CN105972464B

CN105972464B - LED straight tube lamp

Info

Publication number: CN105972464B
Application number: CN201610137135.1A
Authority: CN
Inventors: 江涛; 张跃强; 熊爱明; 李丽琴; 叶奇峰
Original assignee: Jiaxing Super Lighting Electric Appliance Co Ltd
Current assignee: Jiaxing Super Lighting Electric Appliance Co Ltd
Priority date: 2015-03-10
Filing date: 2016-03-10
Publication date: 2024-10-15
Anticipated expiration: 2036-03-10
Also published as: CN205782139U; CN105972464A; CN205640351U

Abstract

The application discloses an LED straight tube lamp, comprising: a lamp tube having two ends; a lamp cap assembly disposed at least one end of the lamp tube; the lamp cap assembly comprises a lamp cap body and at least two conductive pins; the LED lamp comprises a lamp panel, wherein at least one LED light source is arranged on the lamp panel; the power supply module can provide electric energy for the LED light source on the lamp panel, and the power supply module and the at least two conductive pins pass through the protection element; the protection element can disconnect the electrical connection between the power supply module and the at least two conductive pins when the current reaches a preset current; the LED straight tube lamp further comprises a diffusion film, and light generated by the at least one LED light source can pass through the diffusion film.

Description

LED straight tube lamp

Technical Field

The application relates to the field of lighting fixtures, in particular to an LED straight tube lamp.

Background

LED lighting technology is rapidly evolving to replace traditional incandescent and fluorescent lamps. Compared with fluorescent lamps filled with inert gas and mercury, the LED straight tube lamp does not need to be filled with mercury. Therefore, in various lighting systems for home use or workplace use, which are dominated by lighting options such as conventional fluorescent lamps and lamps, LED straight lamps have not unexpectedly become a highly desirable lighting option. Advantages of LED straight tube lamps include increased durability and lifetime, and lower energy consumption. Thus, an LED straight tube lamp would be a cost effective lighting option, taking all factors into account.

The conventional LED straight tube lamp generally includes a lamp tube, a circuit board disposed in the lamp tube and having a light source, and a lamp cap disposed at two ends of the lamp tube, wherein a power module is disposed in the lamp cap, and the light source and the power module are electrically connected (also referred to as an electrical connection and a conductive connection) through the circuit board.

In the conventional LED straight tube lamp, visual graininess often occurs. The LED crystal grains arranged on the circuit board inside the lamp tube belong to point light sources, and the light illumination in the whole lamp tube is uneven because of the characteristics of the point light sources and no proper optical treatment. Therefore, for the observer of the LED straight tube lamp, the whole lamp tube has the effects of granular feel or uneven illumination, the visual comfort is affected, and the visual angle range of emergent light rays is narrowed.

Furthermore, the inventors of the present application have noted that the electronic ballast of an LED lamp will output a high voltage when operating stably, typically up to 600Vrms. For example, when the LED fluorescent lamp tube is replaced with electricity, if one end of the LED fluorescent lamp tube is already connected, the other end of the LED fluorescent lamp tube is not in contact (i.e. a certain distance exists between the conductive pin on the lamp base of the LED fluorescent lamp and the conductive copper sheet of the lamp holder). In this case, the high voltage between the conductive needle and the conductive copper sheet is likely to cause arcing (arc) by the breakdown air, and a large amount of heat is generated at the arc, which results in melting of the conductive needle and the nearby plastic part (base).

Disclosure of Invention

The application provides an LED straight tube lamp to solve the problems.

In order to achieve the above object, the present application provides an LED straight tube lamp, comprising:

a lamp tube having two ends;

A lamp cap assembly disposed at least one end of the lamp tube; the lamp cap assembly comprises at least one lamp cap body connected with the lamp tube and at least two conductive pins;

the lamp panel is accommodated in the lamp tube, and at least one LED light source is arranged on the lamp panel;

a power supply module for supplying power to the LED light source on the lamp panel,

The power supply module is connected with the conductive pin through a protection element; the protection element can disconnect the electrical connection between the power supply module and the conductive pin when the current reaches a preset current and/or the temperature reaches a preset temperature;

the LED straight tube lamp further comprises

And the light generated by the at least one LED light source can pass through the diffusion film.

As a preferred embodiment, the diffusion film comprises

And a diffusion coating coated on the inner peripheral surface or the outer peripheral surface of the lamp tube.

As a preferred embodiment, the diffusion film comprises

And the diffusion coating is coated on the surface of the LED light source.

As a preferred embodiment, the material of the diffusion film includes at least one of calcium carbonate, calcium halophosphate, strontium phosphate, and aluminum oxide.

As a preferred embodiment, the diffusion film comprises a diffusion membrane covered outside the LED light source; the diffusion membrane is not in contact with the LED light source.

As a preferred embodiment, each of the LED light sources is covered with the diffusion film.

As a preferred embodiment, the diffusion film has a thickness of 20 to 30 microns and a light transmittance of 85 to 95%.

As a preferred embodiment, the diffusion film has a thickness of 200 to 300 micrometers and a light transmittance of 92 to 94%.

As a preferred embodiment, the protection element comprises at least two fuses, each of which is connected to each of the conductive pins in a one-to-one correspondence.

In a preferred embodiment, the material of the lamp tube is glass.

As a preferred embodiment, the outer diameter of the cap assembly is substantially equal to the outer diameter of the lamp vessel.

As a preferred embodiment, the inner surface of the lamp tube is a roughened surface with a roughness of 0.1 to 40 microns.

As a preferred implementation mode, the lamp tube and the lamp cap assembly are fixedly connected by adopting silica gel with the heat conductivity coefficient larger than 0.7 w/m.k.

As a preferred implementation mode, the lamp tube is wrapped with a heat shrinkage tube.

As a preferred embodiment, the heat shrinkable tube has a thickness of 20 μm to 200 μm.

As a preferred embodiment, the reflective film is further included; the reflective film is circumferentially arranged on a part of the inner peripheral surface of the lamp tube.

As a preferred embodiment, the ratio of the length of the reflective film along the circumferential direction of the lamp tube to the circumference of the inner circumferential surface of the lamp tube is in the range of 0.3 to 0.5.

As a preferred embodiment, the thickness of the reflective film is 140 micrometers to 350 micrometers.

As a preferred embodiment, the lamp panel is a flexible circuit board.

As a preferred embodiment, the light source module further comprises an adhesive sheet, a lamp panel insulating film and a light source film; the lamp panel is adhered to the inner surface of the lamp tube through the adhesive sheet, and the lamp panel insulating film is coated on the surface of the lamp panel facing the LED light source; the light source film is coated on the surface of the light source.

As a preferred embodiment, the lamp further comprises an adhesive film coated on the outer or inner peripheral surface of the lamp tube, which can adhere the fragments together when the lamp tube is broken.

As a preferred embodiment, the adhesive film has a thickness of 100 micrometers to 140 micrometers.

As a preferred embodiment, the lamp panel includes a metal circuit layer electrically connected to the power module, and the LED light source is disposed on the metal circuit layer.

As a preferred embodiment, the lamp panel further includes a dielectric layer stacked with the metal wiring layer.

As a preferred embodiment, the outer surface of the lamp panel is coated with a circuit protection layer.

As a preferred embodiment, the power module is disposed on a circuit board to form a power module; the power supply assembly is electrically connected with the lamp panel through welding.

As a preferred embodiment, the end of the lamp panel is formed with a free portion; at least one light source bonding pad is arranged on the free part; the output end of the power supply assembly is provided with at least one power supply pad corresponding to the at least one light source pad; one of the light source pad and the power source pad is provided with a through hole.

As a preferred embodiment, the LED light source includes a holder having a recess, and an LED die disposed in the recess.

As a preferred embodiment, the ratio of the length to the width of the LED die ranges from 2:1 to 10:1.

As a preferred embodiment, the bracket has a first side wall extending in the width direction of the lamp tube and a second side wall extending in the length direction of the lamp tube; the first side wall and the second side wall form the groove; the first sidewall is lower than the second sidewall.

As a preferred embodiment, the first side wall has a slope, and the included angle between the slope and the bottom wall of the groove is 105 degrees to 165 degrees.

As a preferred embodiment, the power module includes:

a rectifying circuit coupled to the conductive pin; the rectification circuit is used for rectifying the electric signal to generate a rectified signal; and

A filter circuit coupled to the rectifier circuit; the filtering circuit is used for filtering the rectified signal to generate a filtered signal.

As a preferred embodiment, the power module further includes an anti-flicker circuit coupled to the filter circuit for passing a current greater than a set anti-flicker current value.

As a preferred embodiment, the anti-flicker circuit comprises at least one resistor.

As a preferred embodiment, the rectifying circuit is a full-wave rectifying circuit.

As a preferred embodiment, the filament simulation circuit is further included; the filament simulation circuit is coupled with the conductive needle and is used for detecting whether the LED light source is normally lightened when the power supply module is started.

As a preferred embodiment, the filament simulation circuit comprises at least one capacitor and resistor connected in parallel; the two ends of the capacitor and the resistor are respectively coupled with the conductive pin.

As a preferred embodiment, the power module further comprises an overvoltage protection circuit; the overvoltage protection circuit is coupled to the first filtering output end and the second filtering output end of the filtering circuit, and performs overvoltage protection when the level of the filtered signal is higher than a set overvoltage value.

As a preferred embodiment, the overvoltage protection circuit comprises at least one zener diode.

According to the technical scheme, the LED straight tube lamp provided by the application is provided with the diffusion film for the light generated by at least one LED light source to pass through, so that the visual granular feel of the LED straight tube lamp is reduced, and the visual comfort is improved. Meanwhile, the LED straight tube lamp is provided with a protection element, and overcurrent protection and overtemperature protection can be performed when the protection element is arranged.

Specific embodiments of the invention are disclosed in detail below with reference to the following description and drawings, indicating the manner in which the principles of the invention may be employed. It should be understood that the embodiments of the invention are not limited in scope thereby. The embodiments of the invention include many variations, modifications and equivalents within the spirit and scope of the appended claims.

Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments in combination with or instead of the features of the other embodiments.

It should be emphasized that the term "comprises/comprising" when used herein is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps or components.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained from these drawings without inventive faculty for a person skilled in the art.

FIG. 1 is a perspective view showing an LED straight tube lamp according to an embodiment of the present application;

FIG. 1A is a perspective view showing lamp caps at two ends of a lamp tube of an LED straight tube lamp according to another embodiment of the application having different sizes;

FIG. 2 is an exploded perspective view showing the LED straight tube lamp of FIG. 1;

FIG. 3 is a perspective view showing the front and top of a lamp head assembly of an LED straight tube lamp according to an embodiment of the present application;

FIG. 4 is a plan sectional view showing an internal structure of a lamp tube of an LED straight tube lamp according to an embodiment of the present application along an axial direction, wherein two reflective films extend along a circumferential direction of the lamp tube on two sides of the lamp plate, respectively;

FIG. 5 is a plan sectional view showing an internal structure of a lamp tube of an LED straight tube lamp according to another embodiment of the present application along an axial direction, wherein a reflective film extends along a circumferential direction of the lamp tube only at one side of a lamp plate;

FIG. 6 is a plan sectional view showing the internal structure of a lamp tube of an LED straight tube lamp according to still another embodiment of the present application along the axial direction, wherein the reflective film is located under the lamp plate and extends along the circumference of the lamp tube on both sides of the lamp plate;

FIG. 7 is a plan sectional view showing an internal structure of a lamp tube of an LED straight tube lamp according to still another embodiment of the present application along an axial direction, wherein a reflective film is positioned under a lamp plate and extends along a circumferential direction of the lamp tube only at one side of the lamp plate;

FIG. 8 is a plan sectional view showing an internal structure of a lamp tube of an LED straight tube lamp according to another embodiment of the application along an axial direction, wherein two reflective films are respectively adjacent to two sides of a lamp panel and extend along a circumferential direction of the lamp tube;

FIG. 9 is a plan view, in cross section, showing an LED straight tube lamp according to an embodiment of the present application, wherein the lamp panel is a flexible circuit board and the tail end of the flexible circuit board climbs over the transition portion of the lamp tube and is connected with the output end of the power supply in a welding manner;

FIG. 10 is a plan view, in cross section, showing a flexible circuit board having a double-layer structure of a lamp panel of an LED straight tube lamp according to an embodiment of the present application;

FIG. 11 is a perspective view showing a bonding pad of a flexible circuit board of a lamp panel of an LED straight tube lamp connected with a printed circuit board of a power supply by welding;

FIG. 12 is a plan view showing the pad arrangement of the flexible circuit board of the lamp panel of the LED straight tube lamp according to an embodiment of the application;

FIG. 13 is a plan view showing a flexible circuit board of a lamp panel of an LED straight tube lamp according to another embodiment of the application having 3 pads arranged in a row;

FIG. 14 is a plan view showing a flexible circuit board of a lamp panel of an LED straight tube lamp according to yet another embodiment of the present application having 3 pads arranged in two rows;

FIG. 15 is a plan view showing a flexible circuit board of a lamp panel of an LED straight tube lamp according to yet another embodiment of the present application having 4 bonding pads in a row of bonding pads side by side;

FIG. 16 is a plan view showing a flexible circuit board of a lamp panel of an LED straight tube lamp according to still another embodiment of the present application having 4 pads arranged in two rows;

FIG. 17 is a plan view showing a flexible circuit board having through holes on bonding pads of a lamp panel of an LED straight tube lamp according to an embodiment of the present application;

FIG. 18 is a plan view in cross section showing a soldering process of a bonding pad of the flexible circuit board and a printed circuit board of a power supply using the lamp panel of FIG. 17;

FIG. 19 is a plan view in cross section showing a soldering process of a bonding pad of the flexible circuit board and a printed circuit board of a power supply using the lamp panel of FIG. 17, wherein the hole on the bonding pad is close to the edge of the flexible circuit board;

FIG. 20 is a plan view showing a pad of a flexible circuit board of a lamp panel of an LED straight tube lamp according to an embodiment of the present application having a notch;

FIG. 21 is a plan cross-sectional view showing an enlarged partial cross-section taken along line A-A' in FIG. 20;

FIG. 22 is a perspective view showing a flexible circuit board of a lamp panel of an LED straight tube lamp and a printed circuit board of a power supply combined into a circuit board assembly according to another embodiment of the present application;

FIG. 23 is a perspective view showing another configuration of the circuit board assembly of FIG. 22;

FIG. 24 is a perspective view showing the mounting structure of the light source of the LED straight tube lamp according to an embodiment of the present application;

FIG. 25 is a perspective view showing the power supply in an LED straight tube lamp according to an embodiment of the present application;

FIGS. 26A-26F are schematic diagrams illustrating the structure of a lamp cap according to several embodiments of the present application;

FIG. 27 is a schematic view showing the structure of an illumination lamp according to an embodiment of the present application;

FIG. 28A is a block diagram of an application circuit of a power module of an LED straight tube lamp according to a first preferred embodiment of the present application;

FIG. 28B is a block diagram of an application circuit of a power module of an LED straight tube lamp according to a second preferred embodiment of the present application;

FIG. 28C is a block diagram of an application circuit of a power module of an LED straight tube lamp according to a third preferred embodiment of the present application;

FIG. 28D is a block diagram of an application circuit of a power module of an LED straight tube lamp according to a fourth preferred embodiment of the present application;

FIG. 28E is a block diagram of an application circuit of a power module of an LED straight tube lamp according to a fifth preferred embodiment of the present application;

Fig. 29A is a circuit diagram of a rectifying circuit according to a first preferred embodiment of the present application;

FIG. 29B is a schematic diagram of a rectifying circuit according to a second preferred embodiment of the present application;

FIG. 29C is a schematic diagram of a rectifying circuit according to a third preferred embodiment of the present application;

fig. 29D is a circuit diagram of a rectifying circuit according to a fourth preferred embodiment of the present application;

FIG. 30A is a schematic diagram of an endpoint conversion circuit according to a first preferred embodiment of the present application;

FIG. 30B is a schematic diagram of an endpoint conversion circuit according to a second preferred embodiment of the present application;

FIG. 30C is a schematic diagram of an endpoint conversion circuit according to a third preferred embodiment of the present application;

FIG. 30D is a schematic diagram of a terminal conversion circuit according to a fourth preferred embodiment of the present application;

FIG. 31A is a circuit diagram of an LED module according to a first preferred embodiment of the present application;

FIG. 31B is a circuit diagram of an LED module according to a second preferred embodiment of the present application;

FIG. 31C is a schematic diagram illustrating a wiring of an LED module according to a third preferred embodiment of the present application;

fig. 31D is a schematic diagram of an LED module according to a fourth preferred embodiment of the present application;

FIG. 31E is a schematic diagram of an LED module according to a fifth preferred embodiment of the present application;

FIG. 32A is a block diagram of an application circuit of a power module of an LED straight tube lamp according to a sixth preferred embodiment of the present application;

FIG. 32B is a circuit schematic of an anti-flicker circuit according to a preferred embodiment of the present application;

FIG. 33A is a block diagram of an application circuit of a power module of an LED straight tube lamp according to a seventh preferred embodiment of the present application;

FIG. 33B is a schematic circuit diagram of a filament emulation circuit according to a first preferred embodiment of the present application;

FIG. 33C is a schematic circuit diagram of a filament emulation circuit according to a second preferred embodiment of the present application;

FIG. 33D is a schematic circuit diagram of a filament emulation circuit according to a third preferred embodiment of the present application;

FIG. 33E is a schematic circuit diagram of a filament emulation circuit according to a fourth preferred embodiment of the present application;

FIG. 33F is a schematic circuit diagram of a filament emulation circuit according to a fifth preferred embodiment of the present application;

FIG. 34A is a block diagram of an application circuit of a power module of an LED straight tube lamp according to an eighth preferred embodiment of the present application;

fig. 34B is a circuit diagram of an overvoltage protection circuit according to a preferred embodiment of the application.

Detailed Description

In order to make the technical solution of the present application better understood by those skilled in the art, the technical solution of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, shall fall within the scope of the application.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When a component is considered to be "connected" to another component, it can be directly connected to the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 34B, an LED straight tube lamp according to an embodiment of the application is provided. This LED straight tube lamp includes: a lamp tube 1 having two ends; a lamp cap assembly disposed at least one end of the lamp tube; the lamp cap assembly comprises at least one lamp cap body 300 connected with the lamp tube and at least two conductive pins 301; the lamp panel 2 is accommodated in the lamp tube, and is provided with at least one LED light source; the power supply module can provide electric energy for the LED light source on the lamp panel 2, and is connected with the conductive pin through a protection element; the protection element can disconnect the electrical connection between the power supply module and the conductive pin when the current reaches a preset current and/or the temperature reaches a preset temperature; the LED straight tube lamp further comprises a diffusion film 13, and light generated by the at least one LED light source can pass through the diffusion film 13.

Referring to fig. 1 and 2, in an embodiment of the application, an LED straight tube lamp is provided, which includes: the lamp comprises a lamp tube 1, a lamp plate 2 arranged in the lamp tube 1, and two lamp caps 3 respectively arranged at two ends of the lamp tube 1, wherein the lamp cap assembly comprises the two lamp caps 3, and the two lamp caps 3 can be respectively provided with two conductive pins or can be respectively provided with one conductive pin. Of course, in case the lamp vessel 1 is provided with only one lamp cap 3, the lamp cap assembly comprises one lamp cap 3, which lamp cap 3 is provided with two electrically conductive pins.

The sizes of the two lamp caps 3 are the same or different. Referring to fig. 1A, in the embodiment where the sizes of the lamp caps 3 are different, the size of the smaller lamp cap is preferably 30% to 80% of the size of the larger lamp cap. Further, the lamp tube and the lamp cap assembly can be fixed by using high-heat-conductivity silica gel, and the heat conductivity coefficient of the high-heat-conductivity silica gel is more than or equal to 0.7w/m.k (not shown).

Optionally, the tube 1 is a straight tube, and the material of the tube is glass. The outer diameter of the base 3 (base unit) is substantially equal to the outer diameter of the tube of the lamp 1. Of course, the material of the lamp tube 1 may be plastic, and the application is not limited in any way.

Optionally, the lamp tube can also be wrapped by a heat shrinkage tube, and the lamp tube is insulated. Optionally, the thickness of the heat shrink tube ranges from 20 μm to 200 μm, and preferably ranges from 50 μm to 100 μm (not shown).

Optionally, the inner wall of the lamp tube forms a rough surface, and the outer surface of the lamp tube is a smooth surface, that is, the roughness of the inner wall of the lamp tube is larger than that of the outer surface of the lamp tube. The roughness Ra of the inner wall of the lamp tube is 0.1-40 micrometers, preferably 1-20 micrometers. The surface roughness may be formed using a mechanical processing method such as friction between a tool and a surface of a part during processing, plastic deformation of a surface layer metal at chip separation, high-frequency vibration in a process system, or a chemical method such as a chemical etching method. The depth, the density, the shape and the texture of the trace left on the processed surface are different according to different processing methods and workpiece materials, and the luminous design required by the actual LED straight tube lamp can be realized.

Referring to fig. 2 and 3, in other embodiments, a hole 304 for heat dissipation is provided on the lamp cap 3 (lamp cap assembly) according to the present application. Therefore, heat generated by the power supply module inside the lamp cap 3 can be dissipated without causing the inside of the lamp cap 3 to be in a high-temperature state, so that the reliability of components inside the lamp cap 3 is prevented from being reduced. Further, the holes for heat dissipation on the lamp cap 3 are arc-shaped. Further, the holes for heat dissipation on the lamp cap 3 are three arcs with different sizes. Further, the holes for heat dissipation on the lamp cap 3 are three arcs which gradually change from small to large. Further, the hole for heat dissipation on the lamp cap 3 may be any combination of the above arcs.

In other embodiments, the lamp cap includes a power socket (not shown) for mounting the power module.

Referring to fig. 4, the lamp 1 of the present embodiment includes a diffusion film 13 in addition to the lamp panel 2 (or flexible circuit board) that is tightly attached to the lamp 1, and the light generated by the led light source 202 passes through the diffusion film 13 and then passes out of the lamp 1. The diffusion film 13 has a diffusion effect on the light emitted from the LED light source 202, so as long as the light can penetrate the diffusion film 13 and then pass out of the lamp tube 1, the diffusion film 13 can be arranged in various forms, for example: the diffusion film 13 may be coated or covered on the inner peripheral surface of the lamp tube 1, or a diffusion coating (not shown) coated on the surface of the LED light source 202, or a diffusion film covered (or covered) outside the LED light source 202 as a cover.

Referring to fig. 4 again, when the diffusion film 13 is a diffusion film, it may cover the LED light source 202 and is not in contact with the LED light source 202. The general term of the diffusion film is an optical diffusion film or an optical diffusion plate, and one or a combination of several of PS (polystyrene), PMMA (polymethyl methacrylate), PET (polyethylene terephthalate) and PC (polycarbonate) are used for matching diffusion particles to form a composite material. When light passes through the composite material, the diffusion phenomenon can occur, the light can be corrected into a uniform surface light source so as to achieve the effect of optical diffusion, and finally the brightness of the light tube is uniformly distributed.

When the diffusion film 13 is a diffusion coating, its main component may be any one of calcium carbonate, calcium halophosphate, and aluminum oxide, or a combination of any two thereof, or a combination of three thereof. When calcium carbonate is used as a main material and matched with a proper solution, the diffusion coating formed by the calcium carbonate has excellent diffusion and light transmission effects (more than 90% of the opportunity is achieved).

Preferably, the diffusion membrane may be composed of calcium carbonate, strontium phosphate. The diffusion film composed of calcium carbonate and strontium phosphate can enable the LED straight tube lamp to have good beneficial effects of transmittance and diffusivity. Meanwhile, the current diffusion film keeps better transmittance and diffusivity, and the film thickness is usually 200-300 mu m, so that the thickness is large and the cost is high; the diffusion film can obtain better transmittance and diffusivity under the film thickness of 20-30 mu m, and has the advantages of small thickness, simple manufacturing process and cost saving.

In this example, the diffusion coating comprises, when formulated, calcium carbonate, strontium phosphate (e.g., CMS-5000, white powder), a thickener, and ceramic activated carbon (e.g., ceramic activated carbon SW-C, colorless liquid). Specifically, when the diffusion coating uses calcium carbonate as a main material, and is matched with a thickener, ceramic activated carbon and deionized water, the mixture is coated on the inner peripheral surface of the glass lamp tube, and the average thickness of the coating is between 20 and 30 mu m. The diffusion film 13 formed using such a material may have a light transmittance of about 90%, and generally, the light transmittance ranges from about 85% to 96%. In addition, such a diffusion film 13 can also function as an electrical isolation in addition to having the effect of diffusing light, so that when the lamp tube breaks, the risk of electric shock to the user is reduced; meanwhile, the diffusion film 13 can diffuse the light emitted from the LED light source 202 in all directions when the LED light source emits light, so that the light can illuminate the rear of the LED light source 202, namely, the side close to the flexible circuit board, thereby avoiding the formation of a dark space in the lamp tube 1 and improving the lighting comfort of the space. In addition, when selecting diffusion coatings of different material compositions, another possible embodiment may be used, in which the diffusion film thickness ranges from 200 μm to 300 μm, and the light transmittance is controlled between 92% and 94%, with another effect.

In other embodiments, the diffusion coating may also be made of calcium carbonate as the main material, and a small amount of reflective material (such as strontium phosphate or barium sulfate), thickener, ceramic activated carbon and deionized water may be mixed and coated on the inner peripheral surface of the lamp tube, wherein the average thickness of the coating is between 20 μm and 30 μm. The diffusion film aims to diffuse light, and the diffusion phenomenon is that light rays are reflected by particles in microcosmic view, and the particle size of the reflective materials such as strontium phosphate or barium sulfate is far larger than that of calcium carbonate, so that a small amount of reflective materials are added into the diffusion coating, and the diffusion effect of the light rays can be effectively improved.

Of course, in other embodiments, calcium halophosphate or alumina may be selected as the primary material for the diffusion coating, with particles of calcium carbonate having a particle size of between about 2 μm and 4 μm, and particles of calcium halophosphate and alumina having a particle size of between about 4 μm and 6 μm and 1 μm and 2 μm, respectively. Taking calcium carbonate as an example, when the light transmittance requirement range falls between 85% and 92%, the average thickness of the diffusion coating layer with calcium carbonate as the main material is about 20 μm to 30 μm, and under the same light transmittance requirement range (85% to 92%), the average thickness of the diffusion coating layer with calcium halophosphate as the main material falls between 25 μm and 35 μm, and the average thickness of the diffusion coating layer with aluminum oxide as the main material falls between 10 μm and 15 μm. If the light transmittance is required to be higher, for example, 92% or more, the diffusion coating layer using calcium carbonate, calcium halophosphate or aluminum oxide as the main material is required to be thinner.

That is, depending on the application of the lamp 1, the light transmittance is selected to be different, i.e. the main material of the diffusion coating to be applied, the corresponding thickness, etc. are selected. It should be noted that the higher the transmittance of the diffusion film, the more noticeable the user sees the granular feel of the LED light source.

With continued reference to fig. 4, in one embodiment, the inner peripheral surface of the lamp tube 1 may further be provided with a reflective film 12, where the reflective film 12 is disposed around the lamp panel 2 having the LED light source 202, and occupies a part of the inner peripheral surface of the lamp tube 1 in the circumferential direction. As shown in fig. 4, the reflective film 12 extends along the tube circumference on both sides of the lamp panel 2, and the lamp panel 2 is located substantially at the middle position of the reflective film 12 in the circumference direction. The arrangement of the reflective film 12 has effects in two aspects, on the one hand, when the lamp tube 1 is seen from the side (X direction in the drawing), the LED light source 202 is not directly seen due to the blocking of the reflective film 12, thereby reducing visual discomfort caused by the sense of particles; on the other hand, the light emitted by the LED light source 202 passes through the reflection effect of the reflective film 12, so that the divergence angle of the lamp tube can be controlled, so that the light rays irradiate more towards the direction without the reflective film, the LED straight tube lamp obtains the same irradiation effect with lower power, and the energy saving performance is improved.

Specifically, the reflective film 12 is attached to the inner peripheral surface of the lamp tube 1, and an opening 12a corresponding to the lamp panel 2 is formed in the reflective film 12, and the size of the opening 12a should be identical to the lamp panel 2 or slightly larger than the lamp panel 2 for accommodating the lamp panel 2 with the LED light source 202. During assembly, the lamp panel 2 (or flexible circuit board) with the LED light source 202 is disposed on the inner peripheral surface of the lamp tube 1, and then the reflective film 12 is attached to the inner peripheral surface of the lamp tube, wherein the openings 12a of the reflective film 12 are in one-to-one correspondence with the lamp panel 2, so that the lamp panel 2 is exposed out of the reflective film 12.

In one embodiment, the reflectivity of the reflective film 12 is at least greater than 85%, and the reflective effect is better, and generally above 90%, preferably above 95%, to obtain a more desirable reflective effect. The length of the reflective film 12 extending in the circumferential direction of the lamp tube 1 occupies 30% to 50% of the entire circumference of the lamp tube 1, that is, the ratio between the circumferential length of the reflective film 12 and the circumference of the inner circumferential surface of the lamp tube 1 in the circumferential direction of the lamp tube 1 ranges from 0.3 to 0.5. In the present application, the lamp panel 2 is disposed at the middle of the reflective film 12 in the circumferential direction, that is, the reflective films 12 on both sides of the lamp panel 2 have substantially the same area, as shown in fig. 4. The material of the reflecting film can be any one of PET, strontium phosphate and barium sulfate, or any two of them or three of them, the reflecting effect is better, the thickness range is 140-350 μm, and the effect is better, generally 150-220 μm. As shown in fig. 5, in other embodiments, the reflective film 12 may be disposed on only one side of the lamp panel 2, that is, the reflective film 12 contacts one side of the lamp panel 2 in the circumferential direction, and the Zhou Xiangshan side occupies the circumference of the lamp tube 1 by 0.3 to 0.5. Alternatively, as shown in fig. 6 and 7, the reflective film 12 may be formed without forming an opening, the reflective film 12 may be directly attached to the inner peripheral surface of the lamp tube 1 during assembly, and then the lamp panel 2 with the LED light source 202 may be fixed to the reflective film 12, where the reflective film 12 may extend along the circumferential direction of the lamp tube on one side or both sides of the lamp panel 2.

The various types of reflective films 12 and the various types of diffusion films 13 described in the above embodiments may be arbitrarily combined to achieve individual reflection, individual diffusion or both of the optical effects of reflection and diffusion. For example, only the reflection film 12 may be provided, and the diffusion film 13 may not be provided, as shown in fig. 6, 7, and 8.

In other embodiments, the flexible circuit board may have a wider width, and the circuit board itself may function as the reflective film 12 at the widened portion because the surface of the circuit board includes a circuit protection layer of ink material that has a function of reflecting light. Preferably, the ratio of the length of the flexible circuit board extending along the circumferential direction of the lamp tube 2 to the circumference of the inner circumferential surface of the lamp tube 2 is in the range of 0.3 to 0.5. The flexible circuit board can be coated with a circuit protection layer, which can be an ink material, has the function of increasing reflection, and the widened flexible circuit board extends circumferentially from the light source as a starting point, so that the light of the light source can be concentrated by the widened part.

In other embodiments, the inner peripheral surface of the lamp vessel may be entirely coated with the diffusion coating or may be partially coated with the diffusion coating (where the reflective film 12 is present, but in either case, the diffusion coating is preferably applied to the outer surface of the end region of the lamp vessel 1 so as to make the adhesion between the lamp cap 3 and the lamp vessel 1 stronger.

It should be noted that, in the above embodiments of the present application, one of the group consisting of a diffusion coating, a diffusion film, a reflective film and an adhesive film may be selected for the optical treatment of the light emitted from the light source of the present application.

With continued reference to fig. 2, in an embodiment of the present application, the LED straight tube lamp may further include an adhesive sheet 4, a lamp panel insulation film 7, and a light source film 8. The lamp panel 2 is adhered to the inner peripheral surface of the lamp tube 1 by an adhesive sheet 4. The adhesive sheet 4 shown in fig. 2 may be silica gel, and may be in the form of several pieces shown in the drawings, or a long piece. Various forms of adhesive sheet 4, various forms of lamp panel insulating sheet 7 and various forms of light source sheet 8 may be combined with each other to constitute different embodiments of the present application.

The lamp panel insulating film 7 is coated on the surface of the lamp panel 2 facing the LED light source 202, so that the lamp panel 2 is not exposed, thereby playing an insulating role in isolating the lamp panel 2 from the outside. The through hole 71 corresponding to the LED light source 202 is reserved during gluing, and the LED light source 202 is arranged in the through hole 71. The lamp panel insulating film 7 comprises vinyl polysiloxane, hydrogen polysiloxane and aluminum oxide. The thickness of the lamp panel insulating film 7 ranges from 100 μm to 140 μm (micrometers). If it is less than 100. Mu.m, the insulation effect is insufficient, and if it is more than 140. Mu.m, the waste of material is caused.

The light source film 8 is coated on the surface of the LED light source 202. The color of the light source film 8 is transparent to ensure light transmittance. After being coated on the surface of the LED light source 202, the shape of the light source film 8 may be granular, strip-like or sheet-like. Among these parameters of the light source film 8 are refractive index, thickness, etc. The refractive index of the light source film 8 is allowed to be in the range of 1.22 to 1.6, and if the refractive index of the light source film 8 is the open root of the refractive index of the LED light source 202 housing, or the refractive index of the light source film 8 is plus or minus 15% of the open root of the refractive index of the LED light source 202 housing, the light transmittance is good. The light source housing herein refers to a housing that accommodates the LED die (or chip). In this embodiment, the refractive index of the light source film 8 ranges from 1.225 to 1.253. The light source film 8 allows a thickness range of 1.1mm to 1.3mm, and if less than 1.1mm, the LED light source 202 will not be covered, and if more than 1.3mm, the light transmittance will be reduced, and the material cost will be increased.

When in assembly, the light source film 8 is coated on the surface of the light source 202; then, the lamp panel insulating film 7 is coated on one side surface of the lamp panel 2; then the LED light source 202 is fixed on the lamp panel 2; then, the surface of the lamp panel 2 opposite to the LED light source 202 is stuck and fixed on the inner peripheral surface of the lamp tube 1 through the adhesive sheet 4; finally, the lamp cap 3 is fixed at the end region of the lamp tube 1, and the LED light source 202 is electrically connected with the power supply assembly 5. Or as shown in fig. 9, the flexible circuit board 2 is welded with the power component 5 through a free portion 21 (the free portion 21 is one end of the flexible circuit board 2), or the lamp board 2 is electrically connected with the power component 5 by adopting a traditional wire bonding mode, so as to form a complete LED straight tube lamp.

In this embodiment, the lamp panel 2 is fixed on the inner peripheral surface of the lamp tube 1 by the adhesive sheet 4, so that the lamp panel 2 is attached to the inner peripheral surface of the lamp tube 1, thus increasing the light emitting angle of the whole LED straight tube lamp, and enlarging the viewing angle, and the viewing angle can generally exceed 330 degrees. By coating the lamp panel 2 with the lamp panel insulating film 7 and coating the LED light source 202 with the insulating light source film 8, the insulation treatment of the whole lamp panel 2 is realized, so that even if the lamp tube 1 breaks, electric shock accidents can not occur, and the safety is improved.

Further, an adhesive film (not shown) may be coated on the inner or outer circumferential surface of the lamp tube 1 for isolating the outside and the inside of the lamp tube 1 after the lamp tube 1 is broken. In this embodiment, an adhesive film is coated on the inner peripheral surface of the lamp tube 1.

The composition of the adhesive film may include vinyl terminated silicone oil, hydrogen-containing silicone oil, xylene, and calcium carbonate. Wherein, the dimethylbenzene is an auxiliary material, and when the adhesive film is coated on the inner peripheral surface of the lamp tube 1 and solidified, the dimethylbenzene volatilizes, and the dimethylbenzene mainly has the function of adjusting the viscosity so as to adjust the thickness of the adhesive film.

In one embodiment, the adhesive film has a thickness in the range of 100 μm to 140 μm. If the thickness of the adhesive film is less than 100 mu m, the explosion-proof performance is insufficient, when the glass is broken, the whole lamp tube can be cracked, and if the thickness is more than 140 mu m, the light transmittance can be reduced, and the material cost is increased. If the requirements for explosion-proof performance and light transmittance are relaxed, the thickness range of the adhesive film may be widened to 10 μm to 800 μm.

In this embodiment, since the inside of the lamp tube 1 is coated with the adhesive film, after the glass lamp tube 1 is broken, the adhesive film will adhere the fragments together, and the through holes penetrating the inside and the outside of the lamp tube 1 will not be formed, thereby preventing the user from contacting the charged body inside the lamp tube 11, so as to avoid electric shock accidents, and meanwhile, the adhesive film with the above ratio also has the functions of diffusing light and transmitting light, and improves the light emitting uniformity and the light transmittance of the whole LED straight tube lamp. The adhesive film of this embodiment can be used in combination with the adhesive sheet 4, the lamp panel insulating sheet 7 and the light source sheet 8 described above to constitute various embodiments of the present application. It should be noted that, when the lamp panel 2 is a flexible circuit board, the adhesive film may not be provided.

Further, the lamp panel 2 of the present embodiment adopts a flexible circuit board, so that when the lamp tube 1 is broken, the broken lamp tube 1 cannot be supported to keep in a straight tube state, so as to inform a user that the LED straight tube lamp cannot be used, and avoid electric shock accidents. Therefore, when the flexible circuit soft board is adopted, the electric shock problem caused by the breakage of the glass tube can be relieved to a certain extent. The lamp board 2 is a flexible circuit board and has a single-layer patterned metal circuit layer structure or a double-layer structure of a single-layer patterned metal circuit layer and a dielectric layer.

Referring to fig. 10, in an embodiment, the flexible circuit board as the lamp panel 2 includes a single-layer patterned metal circuit layer 2a with a conductive effect, and the led light source 202 is disposed on the single-layer patterned metal circuit layer 2a and is electrically connected to the power supply through the single-layer patterned metal circuit layer 2 a. The wiring layer having a conductive effect may also be referred to as a conductive layer in this specification. Referring to fig. 10, in the present embodiment, the flexible circuit board may further include a dielectric layer 2b stacked on the single-layer patterned metal circuit layer 2a, wherein the dielectric layer 2b and the single-layer patterned metal circuit layer 2a have the same area, and the single-layer patterned metal circuit layer 2a is disposed on a surface opposite to the dielectric layer 2b for disposing the LED light source 202. The single-layer patterned metal circuit layer 2a is electrically connected to the power component 5 for passing a direct current. The dielectric layer 2b is adhered to the inner peripheral surface of the lamp tube 1 via the adhesive sheet 4 on the surface opposite to the single-layer patterned metal wiring layer 2 a.

In other embodiments, the outer surfaces of the single-layer patterned metal circuit layer 2a and the dielectric layer 2b may be coated with a circuit protection layer, which may be an ink material, having the functions of solder resist and reflection enhancement. Or the flexible circuit board can be a layer structure, namely, only consists of a single-layer patterned metal circuit layer 2a, and then the surface of the single-layer patterned metal circuit layer 2a can be a circuit protection layer coated with the ink material or not. Either a single patterned metal wiring layer 2a structure or a two-layer structure (a single patterned metal wiring layer 2a and a dielectric layer 2 b) can be used together with the circuit protection layer. The circuit protection layer may be provided on one side surface of the flexible circuit board, for example, only on one side having the LED light source 202. It should be noted that the flexible circuit board is of a single-layer patterned metal circuit layer structure 2a or a two-layer structure (a single-layer patterned metal circuit layer 2a and a dielectric layer 2 b), which is obviously more flexible and pliable than the conventional three-layer flexible substrate (two circuit layers with one dielectric layer therebetween), so that the flexible circuit board can be matched with a lamp tube 1 with a special shape (for example, a non-straight tube lamp), and can be tightly attached to the wall of the lamp tube 1. In addition, the flexible circuit flexible board is attached to the wall of the lamp tube in a better configuration, and the smaller the number of layers of the flexible circuit flexible board is, the better the heat dissipation effect is, the lower the material cost is, the more environment-friendly is, and the flexibility effect is also improved.

In other embodiments, the length of the flexible circuit board as the lamp panel 2 is greater than the length of the lamp tube.

With continued reference to fig. 2, the lamp panel 2 is provided with a plurality of (at least one) LED light sources 202, the lamp cap 3 (lamp cap assembly) is provided with a power assembly 5, and the LED light sources 202 are electrically connected with the power assembly 5 through the lamp panel 2. In the embodiments of the present application, the power supply assembly 5 may be a single body (i.e. all power supply modules are integrated in one component) and is disposed in the lamp cap 3 at one end of the lamp tube 1; alternatively, the power supply assembly 5 may be divided into two parts, called a double body (i.e. all power supply modules are respectively arranged in two parts), and the two parts are respectively arranged in the lamp caps 3 at two ends of the lamp tube.

The power supply module can be formed in multiple modes, such as a module after encapsulation molding, specifically, a high-heat-conductivity silica gel (the heat conductivity coefficient is more than or equal to 0.7 w/m.k) is used, and the power supply module is encapsulated and molded through a die to obtain the power supply. Or the power supply component can be formed without pouring sealant, and the exposed power supply module is directly placed into the lamp cap, or the exposed power supply module is wrapped by a traditional heat shrinkage tube and then placed into the lamp cap 3. In other words, in the embodiments of the present application, the power module 5 may be in the form of a single-chip printed circuit board mounted power module as shown in fig. 9, or may be in the form of a single-body module as shown in fig. 25.

Referring to fig. 2 in combination with fig. 25, in one embodiment, one end of the power module 5 has a male pin 51, the other end has a metal pin 52, the end of the lamp panel 2 has a female pin 201, and the lamp cap 3 has a hollow conductive pin 301 for connecting to an external power source as a pin. The male plug 51 of the power supply assembly 5 is inserted into the female plug 201 of the lamp panel 2, and the metal pin 52 is inserted into the hollow conductive pin 301 of the lamp cap 3. The male plug 51 and the female plug 201 correspond to an adapter for electrically connecting the power supply unit 5 and the lamp panel 2. After the metal pins 52 are inserted into the hollow conductive pins 301, the hollow conductive pins 301 are impacted by an external stamping tool, so that the hollow conductive pins 301 are slightly deformed, thereby fixing the metal pins 52 on the power supply assembly 5 and realizing electrical connection. When energized, current passes through the hollow conductive pin 301, the metal pin 52, the male pin 51, and the female pin 201 in order to the lamp panel 2, and through the lamp panel 2 to the LED light source 202. However, the structure of the power supply unit 5 is not limited to the modular form shown in fig. 25. The power module 5 may be a printed circuit board with a power module, and is electrically connected to the lamp panel 2 by the male plug 51 and the female plug 201. In another embodiment, the power source may have a female plug at one end, the lamp panel 2 has a male plug at the end, and the power source is electrically connected to the lamp panel by a female plug and male plug connection method.

In other embodiments, any type of electrical connection between the power module 5 and the lamp panel 2 may be replaced by the conventional wire bonding method for the male plug 51 and the female plug 201, i.e. a conventional metal wire is used to electrically connect one end of the metal wire with the power source and the other end of the metal wire with the lamp panel 2. Further, the metal wire may be covered with an insulating sleeve to protect the user from electric shock. However, the wire bonding connection mode may have a problem of breakage during transportation and is slightly inferior in quality.

In other embodiments, the electrical connection between the power module 5 and the lamp panel 2 may be directly connected by riveting, soldering, welding, or wire bonding. In accordance with the fixing manner of the lamp panel 2, one side surface of the flexible circuit board is adhered and fixed to the inner peripheral surface of the lamp tube 1 by the adhesive sheet 4, and both ends of the flexible circuit board may be optionally fixed or not fixed to the inner peripheral surface of the lamp tube 1.

If both ends of the flexible circuit board are fixed on the inner peripheral surface of the lamp tube 1, it is preferable to provide the female plug 201 on the flexible circuit board, and then insert the male plug 51 of the power module 5 into the female plug 201 to achieve electrical connection.

If the two ends of the lamp panel 2 along the axial direction of the lamp tube 1 are not fixed on the inner peripheral surface of the lamp tube 1, if the wires are connected, the wires are likely to break because the two ends are free in the subsequent moving process and shake easily in the subsequent moving process. Therefore, the connection mode of the lamp panel 2 and the power supply assembly 5 is preferably selected as welding. Specifically, referring to fig. 9, the lamp panel 2 can be directly climbed and welded on the output end of the power supply assembly 5, so that the use of wires is avoided, and the stability of the product quality is improved. At this time, the lamp panel 2 does not need to be provided with a female plug 201, and the output end of the power supply assembly 5 does not need to be provided with a male plug 51.

As shown in fig. 11, a specific method may be to leave a power supply pad a at the output end of the power supply assembly 5, and leave tin on the power supply pad a, so that the thickness of tin on the pad is increased, and welding is convenient, correspondingly, a light source pad b is also left on the end of the lamp panel 2, and the power supply pad a at the output end of the power supply assembly 5 and the light source pad b of the lamp panel 2 are welded together. When the plane where the bonding pad is located is defined as the front surface, the connection between the lamp panel 2 and the power supply unit 5 is most stable by the bonding pads on the front surfaces, but the bonding press head must be pressed against the back surface of the lamp panel 2 during bonding, so that the solder is heated through the lamp panel 2, and the problem of reliability is relatively easy to occur. If, as shown in fig. 17, a hole is formed in the middle of the light source pad b on the front side of the lamp panel 2, and then the light source pad b is stacked on the power source pad a on the front side of the power source assembly 5 with the front side facing upwards for welding, the welding press head can directly heat and melt solder, and the welding press head is easy to realize in practical operation.

As shown in fig. 11, in the above embodiment, the flexible circuit board as the lamp panel 2 is mostly fixed on the inner peripheral surface of the lamp tube 1, only the lamp panel 2 which is not fixed on the inner peripheral surface of the lamp tube 1 at both ends is formed with a free portion 21, and the lamp panel 2 is fixed on the inner peripheral surface of the lamp tube 1. The free portion 21 has the pad b described above. During assembly, the free portion 21 and the welded end of the power supply assembly 5 drive the free portion 21 to shrink toward the inside of the lamp tube 1. The flexible circuit board as the lamp panel 2 may be directly electrically connected to the power module 5 without any free portion through a single-layer patterned metal circuit layer structure or a double-layer structure of a single-layer patterned metal circuit layer and a dielectric layer. In this embodiment, when the lamp panel 2 and the power supply assembly 5 are connected, the surfaces of the pads b and a and the LED light source 202 on the lamp panel face the same direction, and the through hole e as shown in fig. 17 is formed on the pad b on the lamp panel 2, so that the pad b and the pad a are mutually communicated. When the free portion 21 of the lamp panel 2 is deformed by shrinking toward the inside of the lamp tube 1, the solder connection between the printed circuit board of the power module 5 and the lamp panel 2 has a lateral tension on the power module 5. Further, the soldered connection between the printed circuit board of the power module 5 and the lamp panel 2 has a downward pull on the power module 5, compared to the case where the pads a of the power module 5 and the pads b of the lamp panel 2 face each other. This downward pulling force results from the solder in the through hole e to form a more reinforced and secure electrical connection between the power assembly 5 and the lamp panel 2.

As shown in fig. 12, the light source pads b of the lamp panel 2 are two unconnected pads, which are electrically connected with the anode and the cathode of the LED light source 202 respectively, the size of each pad is about 3.5×2mm ², the corresponding pads are also arranged on the printed circuit board of the power component 5, reserved tin is arranged above each pad for facilitating automatic welding of the welding machine, the thickness of tin can be 0.1 to 0.7mm, preferably 0.3 to 0.5mm, and more preferably 0.4 mm. An insulation hole c can be arranged between the two bonding pads to avoid electrical short circuit caused by welding of the two bonding pads together in the welding process, and a positioning hole d can be arranged behind the insulation hole c to enable an automatic welding machine to accurately judge the correct position of the light source bonding pad b.

At least one light source pad b of the lamp panel 2 is electrically connected with the anode and the cathode of the LED light source 202 respectively. In other embodiments, the number of light source pads b may be more than one, such as 2, 3, 4 or more than 4, for compatibility and scalability for subsequent use. When the number of the bonding pads is 1, the two corresponding ends of the lamp panel are respectively and electrically connected with the power supply to form a loop, and the electronic component can be replaced by, for example, an inductor instead of a capacitor to be used as a current stabilizing component. In this specification, the meaning of "inductance" encompasses "inductor", "capacitance" encompasses "capacitor", and the meaning of "resistance" encompasses "resistor". As shown in fig. 13 to 16, when the number of pads is 3, the 3 rd pad may be used as a ground, and when the number of pads is 4, the 4 th pad may be used as a signal input terminal. Correspondingly, the number of the power supply pads a is the same as the number of the light source pads b. When the number of bonding pads is more than 3, the bonding pads can be arranged in a row or two rows, and the bonding pads are arranged at proper positions according to the size of the accommodating area in actual use, so long as the bonding pads are not electrically connected with each other to cause short circuit. In other embodiments, if part of the circuit is fabricated on the flexible circuit board, the light source pads b can be individually one, and the smaller the number of the pads, the more flow is saved in terms of process; the more the number of bonding pads, the more the flexible circuit board and the power output end are electrically connected and fixed.

As shown in fig. 17, in other embodiments, the inside of the light source pad b may have a structure of a soldering perforation e, and the diameter of the soldering perforation e may be 1 to 2mm, preferably 1.2 to 1.8mm, and most preferably 1.5mm, so that the solder for soldering is not easy to pass through when too small. When the power source pad a of the power source assembly 5 is soldered with the light source pad b of the lamp panel 2, the solder for soldering can pass through the soldering perforation e, and then is accumulated above the soldering perforation e to be cooled and condensed, so as to form a solder ball structure g with a diameter larger than that of the soldering perforation e, and the solder ball structure g can function as a nail, besides being fixed through the tin between the power source pad a and the light source pad b, the stability of the electrical connection can be enhanced due to the action of the solder ball structure g.

As shown in fig. 18 to 19, in other embodiments, when the soldering hole e of the light source pad b is less than or equal to 1mm from the edge of the lamp panel 2, solder is deposited on the edge above the hole e through the hole e, and excessive solder flows back down from the edge of the lamp panel 2 and then condenses with the solder on the power source pad a, so that the structure is just like a rivet to firmly pin the lamp panel 2 on the circuit board of the power source assembly 5, and the reliable electrical connection function is provided. As shown in fig. 20 and 21, in other embodiments, the soldering notch f replaces the soldering hole e, the soldering hole of the bonding pad is at the edge, the soldering tin electrically connects and fixes the power source bonding pad a and the light source bonding pad b through the soldering notch f, the tin is easier to climb up the light source bonding pad b to be accumulated around the soldering notch f, more tin forms a solder ball with a diameter larger than the soldering notch f after cooling and condensing, and the fixing capability of the electrical connection structure is enhanced by the solder ball structure. In this embodiment, the solder functions like a C-shaped nail because of the design of the solder gap.

Referring to fig. 22 and 23, in other embodiments, the lamp panel 2 and the power module 5 fixed by soldering may be replaced by a circuit board assembly 25 with a power module 250 mounted thereon. The circuit board assembly 25 has a long circuit board 251 and a short circuit board 253, the long circuit board 251 and the short circuit board 253 are attached to each other and fixed by adhesion, and the short circuit board 253 is located near the periphery of the long circuit board 251. The short circuit board 253 has a power module 25 thereon, and integrally forms a power source. The short circuit board 253 is made of a longer circuit board 251 and is hard so as to support the power module 250.

The long circuit board 251 may be the flexible circuit board or the flexible substrate as the lamp panel 2, and has the single-layer patterned metal circuit layer 2a shown in fig. 10. The single-layer patterned metal circuit layer 2a of the lamp panel 2 and the power module 250 can be electrically connected in different ways according to practical use. As shown in fig. 22, the power module 250 and the long circuit board 251 are both disposed on the same side of the short circuit board 253, and the power module 250 is directly electrically connected to the long circuit board 251. As shown in fig. 23, the power module 250 and the long circuit board 251 are respectively located at two sides of the short circuit board 253, and the power module 250 is electrically connected to the single-layer patterned metal circuit layer 2a of the lamp panel 2 through the short circuit board 253.

As shown in fig. 22, in an embodiment, the circuit board assembly 25 omits the case that the lamp panel 2 and the power module 5 are to be fixed by soldering in the previous embodiment, but the long circuit board 251 and the short circuit board 253 are first adhered and fixed, and then the power module 250 and the single-layer patterned metal circuit layer 2a of the lamp panel 2 are electrically connected. In addition, the lamp panel 2 is not limited to one or two layers of circuit boards as described above. The LED light source 202 is disposed on the single-layer patterned metal circuit layer 2a, and is electrically connected to the power module 5 through the single-layer patterned metal circuit layer2 a. As shown in fig. 23, in another embodiment, the circuit board assembly 25 has a long circuit board 251 and a short circuit board 253, the long circuit board 251 may be a flexible circuit board or a flexible substrate of the above-mentioned lamp board 2, the lamp board 2 includes a single-layer patterned metal circuit layer 2a and a dielectric layer 2b, the dielectric layer 2b and the short circuit board 253 are fixedly connected in a splicing manner, and then the single-layer patterned metal circuit layer 2a is attached to the dielectric layer 2b and extends to the short circuit board 253. The above embodiments do not depart from the application scope of the circuit board assembly 25 of the present application.

In the above embodiments, the short circuit board 253 has a length of about 15 mm to 40 mm, preferably 19 mm to 36 mm, and the long circuit board 251 has a length of 800 mm to 2800 mm, preferably 1200 mm to 2400 mm. The ratio of the short circuit board 253 to the long circuit board 251 may be 1:20 to 1:200.

In addition, in the above embodiment, when the lamp panel 2 and the power module 5 are fixed by welding, the end of the lamp panel 2 is not fixed on the inner peripheral surface of the lamp tube 1, and the power module 5 cannot be safely fixed and supported, in other embodiments, if the power module 5 is required to be separately fixed in the lamp cap at the end region of the lamp tube 1, the lamp cap is relatively long, and the effective light emitting area of the lamp tube 1 is reduced.

Referring to fig. 24, in various embodiments of the present application, the LED light source 202 may be further modified to include a bracket 202b having a recess 202a, and an LED die (or chip) 18 disposed in the recess 202 a. The recess 202a may be one or more. The grooves 202a are filled with phosphor that covers the LED die (or chip) 18 to perform the function of color conversion. It is noted that, compared to the square shape with the ratio of the length to the width of the conventional LED die (or chip) being approximately 1:1, the ratio of the length to the width of the LED die (or chip) 18 used in the embodiments of the present application may be 2:1 to 10:1, and the ratio of the length to the width of the LED die (or chip) 18 used in the embodiments of the present application is preferably 2.5:1 to 5:1, and the optimal range is 3:1 to 4.5:1, so that the length direction of the LED die (or chip) 18 is aligned along the length direction of the lamp tube 1, thereby improving the problems of the average current density of the LED die (or chip) 18 and the overall light-emitting shape of the lamp tube 1.

Referring to fig. 24 again, the bracket 202b of at least one LED light source 202 has a first sidewall 15 arranged along the length direction of the lamp and extending along the width direction of the lamp, and a second sidewall 16 arranged along the width direction of the lamp and extending along the length direction of the lamp, wherein the first sidewall 15 is lower than the second sidewall 16, and two first sidewalls 15 and two second sidewalls define a groove 202a. The first side wall 15 "extends along the width direction of the lamp tube 1" so long as the extending trend is substantially the same as the width direction of the lamp tube 1, and is not required to be strictly parallel to the width direction of the lamp tube 1, for example, the first side wall 15 may have a slight angle difference from the width direction of the lamp tube 1, or the first side wall 15 may be in various shapes such as a folded line shape, an arc shape, and a wave shape; the second side wall 16 "extends along the length direction of the lamp tube 1" so long as the extending direction is substantially the same as the length direction of the lamp tube 1, and is not required to be strictly parallel to the length direction of the lamp tube 1, for example, the second side wall 16 may have a slight angle difference from the length direction of the lamp tube 1, or the second side wall 16 may have various shapes such as a fold line shape, an arc shape, and a wave shape. In various embodiments of the present application, a row of light sources may allow the side walls of the rack having one or more light sources therein to be arranged or extended in other ways.

In the embodiments of the present application, the first side wall 15 is lower than the second side wall 16, so that the light can easily spread out over the support 202b, and the uncomfortable feeling of particles can not be generated in the Y direction through the design of the interval with moderate density, in the embodiments of the present application, if the first side wall is not lower than the second side wall, the LED light sources 202 in each row are arranged more closely, so that the particle feeling can be reduced, and the efficiency is improved. On the other hand, when the user views the lamp from the side of the lamp, for example, in the X-direction, the second sidewall 16 may block the user's line of sight from directly seeing the LED light source 202 to reduce the discomfort of the particles.

Referring again to fig. 24, in various embodiments of the present application, the inner surface 15a of the first sidewall 15 may be configured as a slope, and the slope is configured to facilitate the light to be emitted through the slope relative to the inner surface 15a being configured to be perpendicular to the bottom wall. The slope may comprise a plane or an arc or the slope may be a combination of a plane and an arc. When a flat surface is used, the slope of the flat surface is between about 30 degrees and 60 degrees. That is, the angle between the slope in planar form and the bottom wall of groove 202a ranges from 120 degrees to 150 degrees. Preferably, the slope of the plane is between about 15 degrees and 75 degrees, that is, the angle between the slope in the form of a plane and the bottom wall of groove 202a ranges between 105 degrees and 165 degrees.

In the embodiments of the present application, the LED light sources 202 in one lamp tube 1 have a plurality of LED light sources 202, and the plurality of LED light sources 202 may be arranged in one or more columns, and each column of LED light sources 202 is arranged along the axial direction (Y direction) of the lamp tube 1. When the plurality of LED light sources 202 are arranged in a row along the length direction of the lamp, all the second side walls 16 on the same side in the width direction of the lamp are on the same line in the bracket 202b of the plurality of LED light sources 202, i.e. the second side walls 16 on the same side form a wall-like structure to block the user's vision from directly seeing the LED light sources 202. When the plurality of LED light sources 202 are arranged in a plurality of rows along the length direction of the lamp tube 1, and the arrangement direction of the brackets 202b of the LED light sources 202 in the two outermost rows (i.e., the two rows of LED light sources 202 adjacent to the wall of the lamp tube) is not limited, as long as the brackets 202b of the LED light sources 202 in the two outermost rows have two first side walls 15 arranged along the length direction of the lamp tube 1 (Y direction) and two second side walls 16 arranged along the width direction of the lamp tube 1 (X direction), that is, the brackets 202b of the LED light sources 202 in the two outermost rows have a first side wall 15 extending along the width direction of the lamp tube 1 (X direction), and the brackets 202b of the LED light sources 202 in the other rows between the two rows of LED light sources 202 are not limited, for example, and each bracket 202b of the middle row (third row) of LED light sources 202 may have two first side walls 15 arranged along the length direction of the lamp tube 1 (Y direction) and two second side walls 16 arranged along the width direction of the lamp tube 1 (X direction), or each bracket 202b of the two second side walls 202b arranged along the width direction of the lamp tube 1 (X direction) may be prevented from being staggered, for example, the user may feel comfortable when the user can see the two side walls 202b in the directions of the two side walls 202 arranged along the width direction of the lamp tube 1 (X direction) and the second side walls (X direction) and the second side wall 202 b) and the second side wall is not limited. For the two outermost rows of light sources, other arrangements or extensions of the side walls of the rack in which one or more light sources are located are also allowed.

In view of the above, when the plurality of LED light sources 202 are arranged in a row along the length direction of the lamp tube, the second side walls 16 of the brackets 202b of all the LED light sources 202 need to be respectively positioned on the same straight line, i.e. the second side walls 16 on the same side form a wall-like structure, so as to block the user's vision from directly seeing the LED light sources 202. When the plurality of LED light sources 202 are arranged in a plurality of rows along the length direction of the lamp tube, the outermost second sidewalls 16 of the brackets 202b of all the LED light sources 202 of the two rows along the outermost side in the width direction of the lamp tube need to be positioned on two straight lines, respectively, to form a structure similar to a double-sided wall, so as to block the user's vision from directly seeing the LED light sources 202; the arrangement and extension manners of the side walls of the middle one or more columns of LED light sources 202 are not required, and the side walls of the middle one or more columns of LED light sources 202 can be the same as those of the two outermost columns of LED light sources 202, or other different arrangement manners can be adopted.

Various embodiments of the structure of the lamp head assembly with the protection switch of the present application are described in detail below.

In one embodiment, the power module is connected with the at least two conductive pins through a moving mechanism; the moving mechanism can move when the conductive needle is inserted into the lamp holder to establish the electrical connection between the conductive needle and the power supply module, and when the conductive needle is not inserted into the lamp holder, the moving mechanism disconnects the electrical connection between the conductive needle and the power supply module.

Based on the addition of the moving mechanism, when the conductive pin of the LED straight tube lamp is not inserted into the lamp holder, the conductive pin is not electrically connected with the power supply module, and is in a disconnected state; after the moving mechanism moves, the conductive pin and the power supply module can be electrically connected, the safety performance of the LED straight tube lamp can be improved by arranging the moving mechanism, and the moving mechanism can be equal to a safety switch.

The above description shows that the power supply assembly 5 may be formed by multiple choices, for example, the power supply assembly may be a module after encapsulation molding, specifically, a high-thermal-conductivity silica gel (thermal conductivity is greater than or equal to 0.7w/m·k) is used to encapsulate the power supply module through a mold to obtain a power supply, and the power supply obtained by this way has the advantages of high insulation, high heat dissipation and more regular shape, and can be conveniently matched with other structural members. Or the power supply component can be formed without pouring sealant, and the exposed power supply module is directly placed into the lamp cap, or the exposed power supply module is wrapped by a traditional heat shrinkage tube and then placed into the lamp cap 3. In other words, in the embodiments of the present application, the power module 5 may be in the form of a single-chip printed circuit board mounted power module as shown in fig. 9, or may be in the form of a single-body module as shown in fig. 25. The power module may be used as a core component of the power module 5, and therefore, although the following embodiments are described by taking the electrical connection between the power module 5 and the conductive pins as an example, the essence is still to establish the electrical connection between the power module and the conductive pins.

Fig. 26A is a schematic structural diagram of a lamp cap according to an embodiment of the application. Lamp base 3 (lamp base assembly), comprising: the lamp holder body 300, the power supply unit 5, the conductive pin 301 provided at the tip of the lamp holder body 300, the telescopic device 332 (one type of moving mechanism) having one end which can move along the direction of the conductive pin 301 (i.e., the lamp axial direction) extending out of the lamp holder, and the micro switch 334. Wherein, the micro switch is connected between the conductive pin 301 and the power module (power module 5). The expansion device 332 is provided with a stopper 337, and the movement of the expansion device 332 (i.e., the extension of the expansion device 332 from the base body) is controlled by the stopper 337. The telescopic device 332 is provided with 2 telescopic rods 335, one end of each telescopic rod 335 is connected to the telescopic device 332, the other end of each telescopic rod 335 is inserted into the fixed part 336, and one telescopic rod 335 is close to the micro switch 334; the telescopic rod 335 is sleeved with a spring 333. When the lamp cap 3 is properly mounted to the lamp base, the conductive pin 301 is inserted into the lamp base (not shown); the telescopic device 332 moves along the direction opposite to the direction that the conductive needle 301 is inserted into the lamp holder due to the extrusion of the lamp holder, and one telescopic rod 335 close to the micro switch 334 triggers the micro switch 334, so that the conductive needle 301 is connected with the power supply assembly 5.

The micro switch can be arranged on the lamp holders connected with the two sides of the illuminating lamp. Thus, the damage caused by leakage current when an installer installs the illuminating lamp is greatly reduced. And the requirements of security certification can be met.

When the LED straight tube lamp is not attached to the lamp socket (or when the illumination lamp is taken out of the lamp socket), the telescopic device 332 moves to the outside of the base body due to the spring tension. Micro switch 334 resets, and power supply assembly 5 is disconnected from conductive pin 301.

Fig. 26B is a schematic structural diagram of a lamp cap according to another embodiment of the application. A base 3 comprising: the lamp holder body 300, the power supply assembly 5 (not shown), a conductive pin 301a arranged at the top end of the lamp holder, a telescopic device 332 with one end extending out of the lamp holder and capable of moving along the direction of the conductive pin 301a (namely the axial direction of the illuminating lamp) and a micro switch 334; the expansion device 332 is provided with a stop part 337, and the movement amplitude of the expansion device 332 (namely the amplitude of the expansion device 332 extending out of the lamp holder body) is controlled by the stop part 337; the stopper 337 is also provided with a fixing point for the fixing spring 333. The spring 333 is fixed at one end to the fixed point and at the other end to the fixed portion 336. When the base 3 is properly mounted to the lamp holder, the conductive pin 301a is inserted into the lamp holder (not shown); by being pressed by the lamp socket, the telescopic device 332 moves along the direction opposite to the direction of inserting the conductive pin 301a into the lamp socket, and the protrusion 338 on the telescopic device 332 facing the fixing part 336 triggers the micro switch 334, so that the conductive pin 301a is connected with the power supply assembly 5.

The micro switch can be arranged on the lamp holders connected with the two sides of the illuminating lamp. In the above-described embodiment, the telescopic device 332 is intermittently sleeved around the conductive needle 301 a.

When the illumination lamp is not mounted to the lamp socket (or when the illumination lamp is taken out of the lamp socket), the telescopic device 332 moves to the outside of the cap due to the tension of the spring. Micro switch 334 resets, and power supply assembly 5 is disconnected from conductive pin 301 a.

Fig. 26C is a schematic structural diagram of a lamp cap structure according to another embodiment of the application. A base 3 comprising: the lamp holder body 300, the power supply assembly 5 (not shown), a conductive pin 301 arranged at the top end of the lamp holder, a telescopic device 332 with one end extending out of the lamp holder and capable of moving along the direction of the conductive pin 301 (namely the axial direction of the illuminating lamp) and a micro switch 334; the expansion device 332 is provided with a stop part 337, and the movement amplitude of the expansion device 332 (namely the amplitude of the expansion device 332 extending out of the lamp holder body) is controlled by the stop part 337; the micro switch 334 is disposed inside the telescopic device 332 (the telescopic device 332 extends out of the protrusion of the lamp cap), and the micro switch 334 is sandwiched between two springs (the spring 333a and the spring 333 b) with different elastic coefficients. When the lamp cap 3 is properly mounted to the lamp base, the conductive pin 301 is inserted into the lamp base (not shown); the telescopic device 332 moves along the direction opposite to the direction that the conductive needle 301 is inserted into the lamp holder due to the extrusion of the lamp holder, and the micro switch 334 is triggered due to the action of the springs with different elastic coefficients, so that the conductive needle 301 is connected with the power supply assembly 5.

The micro switch can be arranged on the lamp holders connected with the two sides of the illuminating lamp. Thus, the damage caused by leakage current when an installer installs the illuminating lamp is greatly reduced. Because the lighting lamp is correctly installed, the connection between the conductive pin 301 and the power supply assembly 5 is realized only after the micro switch acts.

In the above-described embodiment, the spring 333b has one end connected to the micro switch 334 and the other end fixed to the fixing portion. The springs 333a and 333b can be operated when receiving a very small force. Preferably, spring 333a is subjected to 0.5 to 1N; and spring 333b may operate at a force of 3 to 4N.

When the illumination lamp is not mounted on the lamp socket, the micro switch 334 operates due to the tension of the spring, so that the power supply assembly 5 is disconnected from the conductive pin 301.

Fig. 26D is a schematic structural diagram of a lamp cap structure according to another embodiment of the application. A base 3 comprising: the lamp holder comprises a lamp holder body 300, a power supply assembly 5 (not shown), a conductive needle 301 arranged at the top end of the lamp holder body 300, a telescopic device 332, two opposite and spaced elastic pieces 334a, wherein one end of the telescopic device extends out of the lamp holder body, and the two elastic pieces 334a are respectively and electrically connected with the conductive needle 301 and the power supply module (the power supply assembly 5); the telescopic device 332 is provided with a stop component, and the movement amplitude of the telescopic device 332 (namely the amplitude of the telescopic device 332 extending out of the lamp holder body) is controlled by the stop component; the telescopic device 332 is provided with a telescopic rod 335 (the telescopic rod 335 is at least partially positioned in the lamp holder body 300), and the telescopic rod 335 is provided with a conductive component 338; the spring 333 is sleeved on the telescopic rod 335, one end of which is fixed to the stopper, and the other end of which is fixed to the fixing portion 336. When the lamp cap 3 is properly mounted to the lamp base, the conductive pin 301 is inserted into the lamp base (not shown); the telescopic device 332 moves along the direction opposite to the direction that the conductive pin 301 is inserted into the lamp holder due to the extrusion of the lamp holder, the conductive component 338 is inserted between the elastic sheets 334a, and the two elastic sheets 334a are electrically connected to realize the connection of the conductive pin 301 and the power supply assembly 5.

The lamp of the embodiment of the application is provided with the same lamp cap at both sides. Thus, the damage caused by leakage current when an installer installs the illuminating lamp is greatly reduced. Meanwhile, the requirements of security certification are met.

In case that the illumination lamp is not mounted to the lamp socket, the power supply assembly 5 is disconnected from the conductive pins 301 due to the tension of the springs.

In the above embodiment, the 2 opposing and spaced apart clips 334a are generally splayed or horn-shaped. Preferably, the spring 334a is made of copper.

Fig. 26E is a schematic structural diagram of a lamp cap structure according to another embodiment of the application. A base 3 comprising: the lamp holder body 300, the power supply assembly 5, a conductive pin 301 arranged at the top end of the lamp holder body 300, a telescopic device 332 with one end capable of moving along the direction of the conductive pin 301 (namely, the axial direction of the illuminating lamp) extending out of the lamp holder body, and an integrally formed elastic sheet 334a with an opening shape; the telescopic device 332 is provided with a stop component, and the movement amplitude of the telescopic device 332 (namely the amplitude of the telescopic device 332 extending out of the lamp holder body) is controlled by the stop component; the telescopic device 332 is provided with a telescopic rod 335, the elastic piece 334a is arranged at the end part of the telescopic rod 335 and is electrically connected with the conductive needle 301, the opening part of the elastic piece 334a faces the direction of the power supply assembly 5, the spring 333 is sleeved on the telescopic rod 335, one end of the spring 333 is fixed on the stop component, and the other end of the spring 333 is fixed on the power supply assembly 5. When the lamp cap 3 is properly mounted to the lamp base, the conductive pin 301 is inserted into the lamp base (not shown); the expansion device 332 moves in the opposite direction to the direction in which the conductive pin 301 is inserted into the lamp socket due to the extrusion of the lamp socket, and the opening of the elastic piece 334a is clamped to a preset connection portion (the connection portion is matched with the opening of the elastic piece) on the power module 5, so that the conductive pin 301 and the power module 5 are electrically connected. In case that the illumination lamp is not mounted to the lamp socket, the power supply assembly 5 is disconnected from the conductive pins 301 due to the tension of the springs.

Fig. 26F is a schematic structural diagram of a lamp cap structure according to another embodiment of the application. A base 3 comprising: the lamp holder body 300, the power supply assembly 5 and the telescopic device 332 which is provided with a conductive needle 301 arranged at the top end of the lamp holder body 300 and one end of which can move along the direction of the conductive needle 301 (namely the axial direction of the illuminating lamp) extends out of the lamp holder body; the telescopic device 332 is provided with a stop component, and the movement amplitude of the telescopic device 332 (namely the amplitude of the telescopic device 332 extending out of the lamp holder body) is controlled by the stop component; the telescopic device 332 is provided with a telescopic rod, and the middle part of one side of the telescopic rod 335, which is close to the power supply assembly 5, adopts a hollow structure; the power supply assembly 5 is provided with a reed which is electrically connected with the conductive needle. When the lamp cap 3 is properly mounted to the lamp base, the conductive pin 301 is inserted into the lamp base (not shown); because the hollow structure reed of the telescopic rod is contacted with the contact on the power supply assembly 5 through the hollow structure, the electric connection between the conductive needle 301 and the power supply assembly 5 is realized. In the case that the illuminating lamp is not mounted on the lamp holder, the telescopic rod is clamped between the reed and the contact due to the tension of the spring, so that the power supply assembly 5 is disconnected from the conductive pin 301.

The lamp holders with the same protection switch are arranged on the two connected sides of the illuminating lamp. Thus, the damage caused by leakage current when an installer installs the illuminating lamp is greatly reduced. Meanwhile, the requirements of security certification are met.

In the above scheme, the telescopic rod 335 adopts a flat strip structure, the middle part of the telescopic rod 335 adopts a hollow structure, and when the illuminating lamp is not mounted on the lamp holder, the end part of the telescopic rod 335 is clamped between the reed and the contact, so that the physical disconnection between the power supply assembly 5 and the conductive needle 301 is realized.

In the above-described solution, the reeds provided on the power module 5 may be provided in the form of a bridge, on the deck of which the reeds are provided facing the contacts, a generally flat, elongated telescopic rod passing through the bridge arch, the ends of which are clamped between the reeds and the contacts. Physically disconnecting the power supply assembly 5 from the conductive pin 301.

In the above-described solution, the length of the extension device 332 extending out of the lamp cap does not exceed the length of the conductive pin of the lamp cap. Preferably, the length of the extension device 332 extending out of the lamp cap is 20% to 95% of the length of the conductive pin of the lamp cap.

As shown in fig. 27, which is a schematic structural diagram of an illumination lamp according to an embodiment of the present application, the illumination lamp 100 includes: lamp 1, lamp cap 3 (to embody the lamp cap design of the present application, the ratio of lamp cap to lamp tube is enlarged, in practice the lamp cap length is about 9.0 mm-70 mm, lamp tube 254 mm-2000 mm (i.e. 1 in.-8 in.)). The lamp holder 3 with a protection switch (a moving mechanism) is respectively arranged at two ends of the lamp tube 1, the conductive pin 301 and the telescopic device 332 are arranged on the lamp holder 3, the micro switch 334 and the lighting circuit 5 module are further arranged in the lamp holder 3, when the illuminating lamp 100 is correctly installed on a lamp holder (not shown), the telescopic device 332 triggers the micro switch 334 to realize the electrical connection between the power supply assembly 5 and the mains supply, and then the LED light source assembly (not shown) in the illuminating lamp 100 is lighted.

Although the above embodiments are described by way of example with respect to the telescopic device as the moving mechanism. However, the movement form of the movement mechanism is not limited to the telescopic movement, and the movement form of the movement mechanism can be expansion and contraction, sliding clamping, plugging and the like, so long as the electric connection between the conductive needle and the power supply module can be realized through movement when the conductive needle is inserted into the lamp holder, and the electric connection between the conductive needle and the power supply module can be disconnected when the conductive needle is not inserted into the lamp holder.

Next, the circuit design and application of the power module 250 will be described.

Fig. 28A is a schematic block diagram of an application circuit of a power module of an LED straight tube lamp according to the first preferred embodiment of the present application. The AC power component 508 is used to provide an AC power signal. The ac power source assembly 508 may be mains power with a voltage range of 100-277V and a frequency of 50 or 60Hz. The lamp driving circuit 505 receives the ac power signal of the ac power module 508 and converts the ac power signal into an ac driving signal as an external driving signal. The lamp driving circuit 505 may be an electronic ballast for converting the mains signal into a high frequency, high voltage ac driving signal. The kind of common electronic ballasts, for example: the LED straight tube lamp of the application is applicable to an instant Start type (INSTANT START) electronic ballast, a preheat Start type (Program Start) electronic ballast, a quick Start type (RAPID START) electronic ballast and the like. The voltage of the alternating current driving signal is more than 300V, and the preferred voltage range is 400-700V; the frequency is greater than 10kHz, with a preferred frequency range of 20k-50kHz. The LED straight tube lamp 500 receives an external driving signal, which is an ac driving signal of the lamp driving circuit 505 in this embodiment, and is driven to emit light. In this embodiment, the LED straight tube lamp 500 is a single-ended power driving structure, and the same end cap of the lamp tube has dual conductive pins as the first pins 501 and the second pins 502 for receiving external driving signals. The first pin 501 and the second pin 502 of the present embodiment are coupled (i.e. electrically connected, directly or indirectly connected) to the lamp driving circuit 505 to receive the ac driving signal.

It should be noted that the lamp driving circuit 505 is an omitted circuit, and is indicated by a dotted line in the drawing. When the lamp driving circuit 505 is omitted, the ac power module 508 is coupled to the first pin 501 and the second pin 502. At this time, the first pin 501 and the second pin 502 receive the ac power signal provided by the ac power component 508 as an external driving signal.

In addition to the single ended power supply application described above, the LED straight tube lamp 500 of the present application may also be applied to a double ended single pin circuit configuration. Fig. 28B is a schematic block diagram of an application circuit of a power module of an LED straight tube lamp according to a second preferred embodiment of the present application. Compared with the lamp shown in fig. 28A, the two end caps of the lamp tube respectively have a single conductive pin, so as to serve as the first pin 501 and the second pin 502 respectively disposed at the two opposite end caps of the lamp tube of the LED straight tube lamp 500 to form two single pins, and the other circuit connections and functions are the same as those of the circuit shown in fig. 28A.

In the present application, the power module may include: a rectifying circuit coupled to the conductive pin; the rectification circuit is used for rectifying the electric signal to generate a rectified signal; and a filter circuit coupled to the rectifier circuit; the filtering circuit is used for filtering the rectified signal to generate a filtered signal. The rectifying circuit may include the first rectifying circuit 510 and/or the second rectifying circuit 540 in the following embodiments, but is not limited to the following embodiments; the filter circuit may include the filter circuit 520 in the following embodiments, but is not limited to the following embodiments.

Next, please refer to fig. 28C, which is a circuit block diagram of an LED straight tube lamp according to a third preferred embodiment of the present application. The power module of the LED straight tube lamp mainly includes a first rectifying circuit 510, a filtering circuit 520, and an LED driving module 530. The first rectifying circuit 510 is coupled to the first pin 501 and the second pin 502 to receive the external driving signal, rectify the external driving signal, and then output the rectified signal from the first rectifying output terminal 511 and the second rectifying output terminal 512. The external driving signal may be an ac driving signal or an ac power signal in fig. 28A and 28B, or even a dc signal without affecting the operation of the LED straight tube lamp. The filtering circuit 520 is coupled to the first rectifying circuit, and is configured to filter the rectified signal; that is, the filtering circuit 520 is coupled to the first rectifying output terminal 511 and the second rectifying output terminal 512 to receive the rectified signal, and filters the rectified signal, and then outputs the filtered signal through the first filtering output terminal 521 and the second filtering output terminal 522. The LED driving module 530 is coupled to the filtering circuit 520 to receive the filtered signal and emit light; that is, the LED driving module 530 is coupled to the first filtered output 521 and the second filtered output 522 to receive the filtered signal, and then drives the LED assembly (not shown) in the LED driving module 530 to emit light. This section is described in detail in the examples below.

It should be noted that, in the present embodiment, the number of the first rectifying output terminal 511, the second rectifying output terminal 512, the first post-filtering output terminal 521, and the second post-filtering output terminal 522 is two, and in actual application, the signal transmission requirements between the circuits of the first rectifying circuit 510, the filtering circuit 520, and the LED driving module 530 are increased or decreased, i.e. the number of the coupling terminals between the circuits may be one or more.

Further, in addition to the embodiments of the power supply module of the LED straight tube lamp shown in fig. 28C and the following power supply modules of the LED straight tube lamp, the embodiments of the power supply module of the LED straight tube lamp shown in fig. 28A and 28B are applicable to a light-emitting circuit structure including two pins for transmitting power, for example: lamp sockets of various lighting lamps such as bulb lamp, PAL lamp, energy saving lamp (PLS lamp, PLD lamp, PLT lamp, PLL lamp, etc.) are applicable.

Fig. 28D is a block diagram of an application circuit of a power module of an LED straight tube lamp according to a fourth preferred embodiment of the present application. The AC power component 508 is used to provide an AC power signal. The lamp driving circuit 505 receives the ac power signal from the ac power module 508 and converts the ac power signal into an ac driving signal. The LED straight tube lamp 500 receives the ac driving signal of the lamp driving circuit 505 and is driven to emit light. In this embodiment, the LED straight tube lamp 500 is a double-ended (each double-pin) power supply, one end cap of the lamp tube has double conductive pins as the first pin 501 and the second pin 502, and the other end cap also has double conductive pins as the third pin 503 and the fourth pin 504. The first pin 501, the second pin 502, the third pin 503 and the fourth pin 504 are coupled to the lamp driving circuit 505 to commonly receive an ac driving signal for driving the LED components (not shown) in the LED straight lamp 500 to emit light. The ac power source module 508 may be a mains supply and the lamp driving circuit 505 may be a ballast or an electronic ballast.

Fig. 28E is a circuit block diagram of an LED straight tube lamp according to a fifth preferred embodiment of the present application. The power module of the LED straight tube lamp mainly includes a first rectifying circuit 510, a filter circuit 520, an LED driving module 530, and a second rectifying circuit 540. The first rectifying circuit 510 is coupled to the first pin 501 and the second pin 502, and is configured to receive and rectify the external driving signal transmitted by the first pin 501 and the second pin 502; the second rectifying circuit 540 is coupled to the third pin 503 and the fourth pin 504, and is configured to receive and rectify the external driving signals transmitted by the third pin 503 and the fourth pin 504. That is, the power module of the LED straight tube lamp may include a first rectifying circuit 510 and a second rectifying circuit 540, which are commonly connected to the first rectifying output terminal 511 and the second rectifying output terminal 512 to output the rectified signal. The filtering circuit 520 is coupled to the first rectifying output terminal 511 and the second rectifying output terminal 512 to receive the rectified signal, and filters the rectified signal, and then outputs the filtered signal through the first filtering output terminal 521 and the second filtering output terminal 522. The LED driving module 530 is coupled to the first filtered output 521 and the second filtered output 522 to receive the filtered signal, and then drives the LED assembly (not shown) in the LED driving module 530 to emit light.

The power module of the LED straight tube lamp of the present embodiment can be applied to the dual-end power architecture of fig. 28D. It should be noted that, since the power module of the LED straight tube lamp of the present embodiment has the first rectifying circuit 510 and the second rectifying circuit 540 at the same time, the power module can also be applied to the single-ended power architecture of fig. 28A and 28B to receive the external driving signal (including the ac power signal, the ac driving signal, etc. in the foregoing embodiments). Of course, besides the present embodiment, the power module of the LED straight tube lamp of the other embodiments can also be applied to the driving structure of the direct current signal.

Fig. 29A is a schematic circuit diagram of a rectifying circuit according to a first preferred embodiment of the present application. The rectifying circuit 610 is a bridge rectifying circuit, and includes a first rectifying diode 611, a second rectifying diode 612, a third rectifying diode 613 and a fourth rectifying diode 614 for full-wave rectifying the received signal. The anode of the first rectifying diode 611 is coupled to the second rectifying output 512, and the cathode is coupled to the second pin 502. The anode of the second rectifying diode 612 is coupled to the second rectifying output 512, and the cathode is coupled to the pin 501. The anode of the third rectifying diode 613 is coupled to the second pin 502, and the cathode is coupled to the first rectifying output 511. The positive electrode of the rectifying diode 614 is coupled to the pin 501, and the negative electrode is coupled to the first rectifying output 511.

When the signals received by the first pin 501 and the second pin 502 are ac signals, the operation of the rectifying circuit 610 is described as follows. When the ac signal is in the positive half wave, the ac signal flows in through the first pin 501, the rectifying diode 614 and the first rectifying output 511 in sequence, and flows out through the second rectifying output 512, the first rectifying diode 611 and the second pin 502 in sequence. When the ac signal is in the negative half-wave, the ac signal flows in after passing through the second pin 502, the third rectifying diode 613 and the first rectifying output 511 in sequence, and flows out after passing through the second rectifying output 512, the second rectifying diode 612 and the pin 501 in sequence. Therefore, no matter the ac signal is in the positive half-wave or the negative half-wave, the positive electrode of the rectified signal of the rectifying circuit 610 is located at the first rectifying output terminal 511, and the negative electrode is located at the second rectifying output terminal 512. According to the above description, the rectified signal outputted from the rectifying circuit 610 is a full-wave rectified signal.

When the first pin 501 and the second pin 502 are coupled to the dc power source to receive the dc signal, the operation of the rectifying circuit 610 is described as follows. When the first pin 501 is coupled to the positive terminal of the dc power supply and the second pin 502 is coupled to the negative terminal of the dc power supply, the dc signal flows in through the first pin 501, the rectifying diode 614 and the first rectifying output 511 in sequence, and flows out through the second rectifying output 512, the first rectifying diode 611 and the second pin 502 in sequence. When the first pin 501 is coupled to the negative terminal of the dc power supply and the second pin 502 is coupled to the positive terminal of the dc power supply, the ac signal flows in through the second pin 502, the third rectifying diode 613 and the first rectifying output 511 in sequence, and flows out through the second rectifying output 512, the second rectifying diode 612 and the first pin 501 in sequence. Similarly, no matter how the dc signal is input through the first pin 501 and the second pin 502, the positive poles of the rectified signal of the rectifying circuit 610 are located at the first rectifying output end 511, and the negative poles are located at the second rectifying output end 512.

Therefore, the rectifying circuit 610 in this embodiment can correctly output the rectified signal no matter whether the received signal is an ac signal or a dc signal.

Fig. 29B is a schematic circuit diagram of a rectifying circuit according to a second preferred embodiment of the present application. The rectifying circuit 710 includes a first rectifying diode 711 and a second rectifying diode 712 for half-wave rectifying the received signal. The positive terminal of the first rectifying diode 711 is coupled to the second pin 502, and the negative terminal is coupled to the first rectifying output 511. The positive terminal of the second rectifying diode 712 is coupled to the first rectifying output terminal 511, and the negative terminal is coupled to the first pin 501. The second rectifying output 512 may be omitted or grounded depending on the application.

The operation of the rectifying circuit 710 is described next.

When the ac signal is in the positive half wave, the signal level of the ac signal input at the first pin 501 is higher than the signal level of the ac signal input at the second pin 502. At this time, the first rectifying diode 711 and the second rectifying diode 712 are in the reverse biased off state, and the rectifying circuit 710 stops outputting the rectified signal. When the ac signal is in the negative half wave, the signal level of the ac signal input at the first pin 501 is lower than the signal level of the ac signal input at the second pin 502. At this time, the first rectifying diode 711 and the second rectifying diode 712 are in a forward-biased conductive state, and the ac signal flows in through the first rectifying diode 711 and the first rectifying output terminal 511, and flows out from the second rectifying output terminal 512 or another circuit or ground terminal of the LED straight tube lamp. According to the above description, the rectified signal output by the rectifying circuit 710 is a half-wave rectified signal.

Fig. 29C is a schematic circuit diagram of a rectifying circuit according to a third preferred embodiment of the present application. The rectifying circuit 810 includes a rectifying unit 815 and an endpoint converting circuit 541 for half-wave rectification. In this embodiment, the rectifying unit 815 is a half-wave rectifying circuit, and includes a first rectifying diode 811 and a second rectifying diode 812 for half-wave rectification. The positive terminal of the first rectifying diode 811 is coupled to the second rectifying output terminal 512, and the negative terminal is coupled to the half-wave connection point 819. The positive terminal of the second rectifying diode 812 is coupled to the half-wave connection point 819, and the negative terminal is coupled to the first rectifying output 511. The endpoint conversion circuit 541 is coupled to the half-wave connection point 819, and the first pin 501 and the second pin 502 for transmitting signals received by the first pin 501 and the second pin 502 to the half-wave connection point 819. By the endpoint conversion function of the endpoint conversion circuit 541, the rectifying circuit 810 can provide two input terminals (coupled to the endpoints of the first pin 501 and the second pin 502) and two output terminals (the first rectifying output terminal 511 and the second rectifying output terminal 512).

The operation of the rectifying circuit 810 in some embodiments is described below.

When the ac signal is in the positive half wave, the ac signal flows in after passing through the first pin 501 (or the second pin 502), the endpoint conversion circuit 541, the half wave connection point 819, the second rectifying diode 812 and the first rectifying output 511 in sequence, and flows out from another circuit of the LED straight tube lamp. When the ac signal is in the negative half-wave, the ac signal flows in from another circuit of the LED straight tube lamp, and then flows out through the second rectifying output terminal 512, the first rectifying diode 811, the half-wave connection point 819, the endpoint conversion circuit 541 and the first pin 501 (or the second pin 502).

It is noted that the endpoint conversion circuit 541 may include a resistor, a capacitor, an inductor, or a combination thereof, to have at least one of current/voltage limiting, protection, current/voltage regulation, and the like. For a description of these functions, reference is made to the following description.

In practice, the rectifying unit 815 and the endpoint conversion circuit 541 can be exchanged without affecting the half-wave rectifying function. Fig. 29D is a schematic circuit diagram of a rectifying circuit according to a fourth preferred embodiment of the present application. The positive terminal of the first rectifying diode 811 is coupled to the second pin 502, the negative terminal of the second rectifying diode 812 is coupled to the first pin 501, and the negative terminal of the first rectifying diode 811 and the positive terminal of the second rectifying diode 812 are simultaneously coupled to the half-wave connection point 819. The endpoint conversion circuit 541 is coupled to the half-wave connection point 819, and the first rectifying output 511 and the second rectifying output 512. When the ac signal is in the positive half-wave, the ac signal flows in from another circuit of the LED straight tube lamp, and then flows out through the second rectifying output terminal 512 (or the first rectifying output terminal 511), the half-wave connection point 819 of the endpoint conversion circuit 541, the second rectifying diode 812, and the first pin 501. When the ac signal is in the negative half wave, the ac signal flows in after passing through the second pin 502, the first rectifying diode 811, the half wave connection point 819, the endpoint conversion circuit 541 and the first rectifying output end 511 (or the second rectifying output end 512) in sequence, and flows out from another circuit of the LED straight tube lamp.

It should be noted that the sum endpoint conversion circuit 541 in the embodiment shown in fig. 29C and 29D may be omitted, and thus is shown by a dashed line. After omitting the endpoint conversion circuit 541, the first pin 501 and the second pin 502 are coupled to the half-wave connection point 819 in fig. 29C. After omitting the endpoint conversion circuit 541, the first rectifying output terminal 511 and the second rectifying output terminal 512 are coupled to the half-wave connection point 819 in fig. 29D.

When the first pin 501 and the second pin 502 of the rectifying circuit shown in fig. 29A to 29D are changed to the third pin 503 and the fourth pin 504, the rectifying circuit can be used as the second rectifying circuit 540 shown in fig. 28E.

Next, the selection and combination of the first rectifying circuit 510 and the second rectifying circuit 540 are described with reference to fig. 28C and 28E.

The first rectifying circuit 510 of the embodiment shown in fig. 28C may use the rectifying circuit 610 shown in fig. 29A.

The first rectifying circuit 510 and the second rectifying circuit 540 in the embodiment shown in fig. 28E may use any rectifying circuit in fig. 29A to 29D, and the rectifying circuits in fig. 29C and 29D may omit the endpoint conversion circuit 541 without affecting the rectifying function required for the operation of the LED straight tube lamp. When the first rectifying circuit 510 and the second rectifying circuit 540 are half-wave rectified rectifying circuits shown in fig. 29B to 29D, one of the first rectifying circuit 510 and the second rectifying circuit 540 is responsible for flowing in and the other is responsible for flowing out as the ac signal is in the positive half-wave or the negative half-wave. Furthermore, if the first rectifying circuit 510 and the second rectifying circuit 540 are selected from fig. 29C or 29D, or one of fig. 29C and 29D, the endpoint conversion circuit 541 of one of them has the functions of current/voltage limiting, protection, and current/voltage regulation, and the other endpoint conversion circuit 541 may be omitted.

Fig. 30A is a schematic circuit diagram of an endpoint conversion circuit according to a first preferred embodiment of the present application. The endpoint conversion circuit 641 includes a capacitor 642, one end of the capacitor 642 is coupled to the first pin 501 and the second pin 502, and the other end is coupled to the half-wave connection point 819. Capacitor 642 has an equivalent impedance to the ac signal. The lower the frequency of the ac signal, the greater the equivalent impedance value of the capacitor 642; the higher the frequency of the ac signal, the smaller the equivalent impedance value of the capacitor 642. Therefore, the capacitor 642 in the endpoint conversion circuit 641 of the present embodiment has a high-pass filtering effect. Furthermore, the endpoint conversion circuit 641 is connected in series with the LED components in the LED straight tube lamp, and has the functions of limiting current and limiting voltage on the LED components under the equivalent impedance, so that the LED components can be prevented from being damaged due to the excessively high current and voltage. In addition, by matching the capacitance value of the frequency selective capacitor 642 of the ac signal, the LED module can be further provided with current and voltage adjusting functions.

It is noted that the endpoint conversion circuit 641 may additionally include a capacitor 645 and/or a capacitor 646. One end of the capacitor 645 is coupled to the half-wave connection point 819, and the other end is coupled to the third pin 503. One end of the capacitor 646 is coupled to the half-wave connection point 819, and the other end is coupled to the fourth pin 504. That is, the capacitors 645 and 646 have the half-wave connection point 819 as a common connection terminal, and the capacitor 642 as a current adjusting capacitor is coupled to the common connection terminal and the first pin 501 and the second pin 502. In such a circuit configuration, capacitors 642 and 645 are connected in series between one of the first pin 501 and the second pin 502 and the third pin 503, or capacitors 642 and 646 are connected in series between one of the first pin 501 and the second pin 502 and the fourth pin 504. By means of the equivalent impedance value of the serially connected capacitors, the AC signal is divided. Referring to fig. 28E, according to the ratio of the equivalent impedance values of the capacitors connected in series, the voltage across the capacitor 642 in the first rectifying circuit 510 and the voltage across the filter circuit 520 and the LED driving module 530 can be controlled, so that the current flowing through the LED module 530 is limited within a rated current value, and the filter circuit 520 and the LED driving module 530 are prevented from being damaged by the excessive voltage, thereby protecting the filter circuit 520 and the LED driving module 530.

Fig. 30B is a circuit diagram of an endpoint conversion circuit according to a second preferred embodiment of the present application. The endpoint conversion circuit 741 includes capacitors 743 and 744. One end of the capacitor 743 is coupled to the first pin 501, and the other end is coupled to the half-wave connection point 819. One end of the capacitor 744 is coupled to the second pin 502, and the other end is coupled to the half-wave connection point 819. Compared to the endpoint conversion circuit 641 shown in fig. 30A, the endpoint conversion circuit 741 mainly changes the capacitor 642 into two capacitors 743 and 744. The capacitance values of the capacitors 743 and 744 may be the same or different depending on the signal sizes received by the first pin 501 and the second pin 502.

Similarly, the endpoint conversion circuit 741 may further include a capacitor 745 and/or a capacitor 746 coupled to the third pin 503 and the fourth pin 504, respectively. Thus, any one of the first pin 501 and the second pin 502 and any one of the third pin 503 and the fourth pin 504 have a capacitance connected in series to achieve the voltage division function and the protection function.

Fig. 30C is a schematic circuit diagram of an endpoint conversion circuit according to a third preferred embodiment of the present application. The endpoint conversion circuit 841 includes capacitors 842, 843, and 844. Capacitors 842 and 843 are connected in series between first pin 501 and half-wave connection point 819. Capacitors 842 and 844 are connected in series between the second pin 502 and the half-wave connection point 819. Under such a circuit architecture, any of the capacitors 842, 843, and 844 is shorted, and there is still a capacitor between the first pin 501 and the half-wave connection point 819 pin, and between the second pin 502 and the half-wave connection point 819, and still has a current limiting effect. Therefore, when a user touches the LED straight tube lamp by mistake and gets an electric shock, the electric shock injury of the user caused by the fact that the excessive current flows through the human body can be avoided. The capacitance of capacitors 843, 844 is preferably half the capacitance of capacitor 842.

Similarly, the endpoint conversion circuit 841 may further include a capacitor 845 and/or a capacitor 846 coupled to the third pin 503 and the fourth pin 504, respectively. Thus, any one of the first pin 501 and the second pin 502 and any one of the third pin 503 and the fourth pin 504 have a capacitance connected in series to achieve the voltage division function and the protection function.

The voltage division across capacitors 645 and 646, 745 and 746, and 845 and 846 of the above embodiments is preferably less than 500V, for example: in the range of 100-500V, more preferably below 400V, for example: 300-400V.

The inventors of the present application have noted that the electronic ballast of an LED lamp will output a high voltage when operating stably, typically up to 600Vrms. When the LED fluorescent lamp tube is replaced in a charged mode, if one end of the LED fluorescent lamp tube is connected, the other end of the LED fluorescent lamp tube is not contacted (namely, a distance exists between a conductive needle on a lamp holder of the LED fluorescent lamp and a conductive copper sheet of a lamp holder). In this case, the high voltage between the conductive needle and the conductive copper sheet is likely to cause arcing (arc) by the breakdown air, and a large amount of heat is generated at the arc, which results in melting of the conductive needle and the nearby plastic part (base).

In view of the above, in the present application, the power module is connected to the conductive pin through a protection element; the protection element can disconnect the electrical connection between the power supply module and the conductive pin when the current reaches a preset current and/or the temperature reaches a preset temperature. By the aid of the protection element, overcurrent protection and overtemperature protection can be achieved for the LED straight tube lamp.

As shown in fig. 30D, the at least one protection element may include at least two fuses, each of which is connected to each of the conductive pins in a one-to-one correspondence.

Of course, the protection element is not limited to the current limiting fuse, and the protection element may also be electronic components such as a fuse resistor, a current limiter, a temperature fuse, etc. For example, when the protection element adopts a current limiting fuse, the protection element can take a cutting action when the current exceeds a preset current (such as rated current), so as to protect the LED straight tube lamp. For another example, when the protection element adopts a temperature fuse, the protection element can take a cutting action when the temperature exceeds a preset temperature (such as a rated temperature), so as to protect (a lamp cap of) the LED straight tube lamp.

Fig. 30D is a circuit diagram of an endpoint conversion circuit according to a fourth preferred embodiment of the present application. The endpoint conversion circuit 941 includes fuses 947, 948. The fuse 947 has one end coupled to the first pin 501 and the other end coupled to the half-wave connection point 819. The fuse 948 has one end coupled to the second pin 502 and the other end coupled to the half-wave connection point 819. Therefore, when the current flowing through either the first pin 501 or the second pin 502 is higher than the rated current of the fuses 947 and 948, the fuses 947 and 948 are correspondingly fused to open the circuit, thereby achieving the function of overcurrent protection.

Of course, in the embodiment of the endpoint conversion circuit, the first pin 501 and the second pin 502 are changed to the third pin 503 and the fourth pin 504 (and the third pin 503 and the fourth pin 504 are changed to the first pin 501 and the second pin 502), so that the endpoint conversion circuit can be converted to the second rectifying circuit 540.

The capacitance of the capacitor in the above embodiment of the endpoint conversion circuit preferably falls between 100pF and 100 nF. In addition, the capacitor may be equivalently replaced by two or more capacitors connected in parallel or in series. For example: the capacitors 642, 842 may be replaced by two capacitors in series. The capacitance value of one of the 2 capacitors can be selected from the range of 1.0nF to 2.5nF, preferably 1.5nF; the other is selected from the range of 1.5nF to 3.0nF, preferably 2.2nF.

Fig. 31A is a circuit schematic diagram of an LED module according to a first preferred embodiment of the present application. The positive terminal of the LED module 630 is coupled to the first filter output 521, and the negative terminal is coupled to the second filter output 522. The LED module 630 includes at least one LED unit 632, i.e., the light source in the previous embodiment. The LED units 632 are connected in parallel with each other when two or more are provided. The positive terminal of each LED unit is coupled to the positive terminal of the LED module 630 to be coupled to the first filtering output 521; the negative terminal of each LED unit is coupled to the negative terminal of the LED module 630 to couple to the second filter output 522. The LED unit 632 includes at least one LED assembly 631. When the LED assemblies 631 are plural, the LED assemblies 631 are connected in series, the positive terminal of a first LED assembly 631 is coupled to the positive terminal of the associated LED unit 632, and the negative terminal of the first LED assembly 631 is coupled to the next (second) LED assembly 631. While the positive terminal of the last LED assembly 631 is coupled to the negative terminal of the previous LED assembly 631, and the negative terminal of the last LED assembly 631 is coupled to the negative terminal of the associated LED unit 632.

It should be noted that the LED module 630 can generate the current detection signal S531, which represents the magnitude of the current flowing through the LED module 630, for detecting and controlling the LED module 630.

Fig. 31B is a circuit schematic diagram of an LED module according to a second preferred embodiment of the present application. The positive terminal of the LED module 630 is coupled to the first filter output 521, and the negative terminal is coupled to the second filter output 522. The LED module 630 includes at least two LED units 732, and the positive terminal of each LED unit 732 is coupled to the positive terminal of the LED module 630 and the negative terminal is coupled to the negative terminal of the LED module 630. The LED unit 732 comprises at least two LED assemblies 731, the LED assemblies 731 within the associated LED unit 732 are connected in the same manner as described in fig. 31A, the anode of the LED assembly 731 being coupled to the anode of the next LED assembly 731, while the anode of the first LED assembly 731 is coupled to the anode of the associated LED unit 732, and the cathode of the last LED assembly 731 is coupled to the cathode of the associated LED unit 732. Furthermore, the LED units 732 in the present embodiment are also connected to each other. The anodes of the nth LED assemblies 731 of each LED unit 732 are connected to each other, and the cathodes are also connected to each other. Therefore, the connection between the LED components of the LED module 630 of the present embodiment is a mesh connection.

Similarly, the LED module 630 of the present embodiment can generate the current detection signal S531, which represents the magnitude of the current flowing through the LED module 630, for detecting and controlling the LED module 630.

In practice, the LED units 732 preferably include 15 to 25, more preferably 18 to 22, LED assemblies 731.

Fig. 31C is a schematic diagram illustrating a wiring of an LED module according to a third preferred embodiment of the present application. The connection relationship of the LED module 831 of the present embodiment is the same as that shown in fig. 31B, and three LED units are described here as an example. The positive and negative conductors 834, 835 receive driving signals to provide power to each LED element 831, for example: the positive conductive line 834 is coupled to the first filter output 521 of the filter circuit 520, and the negative conductive line 835 is coupled to the second filter output 522 of the filter circuit 520 to receive the filtered signal. For ease of illustration, the nth of each LED unit is divided into the same LED group 833 in the figure.

The positive lead 834 connects the first (left) positive pole of the three LED assemblies 831 in the leftmost LED unit, i.e., the leftmost LED set 833 as shown, while the negative lead 835 connects the last (right) negative pole of the last LED assembly 831 in the three LED units, i.e., the leftmost LED set 833 as shown. The negative electrode of the first LED component 831, the positive electrode of the last LED component 831, and the positive and negative electrodes of the other LED components 831 of each LED unit are connected through a connecting wire 839.

In other words, the anodes of the three LED elements 831 of the leftmost LED set 833 are connected to each other through the positive electrode lead 834, and the cathodes thereof are connected to each other through the leftmost connection lead 839. The anodes of the three LED elements 831 of the left two LED groups 833 are connected to each other through the leftmost connection wire 839, and the cathodes thereof are connected to each other through the left two connection wires 839. Since the cathodes of the three LED components 831 of the leftmost LED group 833 and the anodes of the three LED components 831 of the left two LED groups 833 are connected to each other through the leftmost connection wire 839, the cathodes of the first LED component and the anodes of the second LED component of each LED unit are connected to each other. And so on to form a mesh connection as shown in fig. 31B.

It is noted that the width 836 of the connection wire 839 at the portion connected to the positive electrode of the LED module 831 is smaller than the width 837 of the connection wire connected to the negative electrode of the LED module 831. The area of the negative electrode connection portion is made larger than the area of the positive electrode connection portion. In addition, the width 837 is smaller than the width 838 of the portion of the connection wire 839 where the positive electrode and the negative electrode adjacent to one of the two LED elements 831 are simultaneously connected, so that the area of the portion connected to the positive electrode and the negative electrode simultaneously is larger than the area of the portion connected to the negative electrode only and the area of the portion connected to the positive electrode. Thus, such a cabling arrangement facilitates heat dissipation from the LED assembly.

In addition, the positive lead 834 may further include a positive lead 834a, and the negative lead 835 may further include a negative lead 835a, such that both ends of the LED module have positive and negative connection points. Such a wiring architecture may enable other circuits of the power module of the LED straight tube lamp, such as: the filter circuit 520, the first rectifying circuit 510 and the second rectifying circuit 540 are coupled to the LED module by the positive and negative connection points at either or both ends, increasing the flexibility of the configuration arrangement of the actual circuit.

Fig. 31D is a schematic diagram illustrating a wiring of an LED module according to a fourth preferred embodiment of the present application. The connection relationship of the LED components 931 of the present embodiment is as shown in fig. 31A, and here, three LED units each including 7 LED components are exemplified. The positive and negative conductors 934, 935 receive drive signals to provide power to each LED assembly 931, for example: the positive conductive line 934 is coupled to the first filter output 521 of the filter circuit 520, and the negative conductive line 935 is coupled to the second filter output 522 of the filter circuit 520 to receive the filtered signal. For ease of illustration, seven LED assemblies in each LED unit are divided into the same LED group 932 in the figure.

The positive lead 934 connects the (left) positive electrode of the first (leftmost) LED assembly 931 in each LED group 932. Negative lead 935 connects the (right side) negative poles of the last (rightmost) LED assembly 931 in each LED group 932. In each LED group 932, the negative electrode of the LED component 931 adjacent to the left of the two LED components 931 is connected to the positive electrode of the right LED component 931 through a connection wire 939. Whereby the LED assemblies of the LED group 932 are connected in series in a string.

It is noted that the connection wire 939 is used to connect the negative electrode of one of the two adjacent LED assemblies 931 and the positive electrode of the other. The negative lead 935 is used to connect the negative pole of the last (right-most) LED assembly 931 of each LED group. The positive lead 934 is used to connect the positive electrode of the first (leftmost) LED assembly 931 of each LED group. Therefore, the width and the heat dissipation area for the LED assembly are from large to small in the order. That is, the width 938 of the connecting wire 939 is greatest, the width 937 times the negative wire 935 connects the negative pole of the LED assembly 931, and the width 936 of the positive wire 934 connects the positive pole of the LED assembly 931 is smallest. Thus, such a cabling arrangement facilitates heat dissipation from the LED assembly.

In addition, the positive lead 934 may further include a positive lead 934a, and the negative lead 935 may further include a negative lead 935a, such that both ends of the LED module have positive and negative connection points. Such a wiring architecture may enable other circuits of the power module of the LED straight tube lamp, such as: the filter circuit 520, the first rectifying circuit 510 and the second rectifying circuit 540 are coupled to the LED module by the positive and negative connection points at either or both ends, increasing the flexibility of the configuration arrangement of the actual circuit.

Furthermore, the traces shown in fig. 31C and 31D may be implemented as flexible circuit boards. For example, the flexible circuit board has a single wiring layer, and the positive electrode lead 834, the positive electrode lead 834a, the negative electrode lead 835a, and the connection lead 839 in fig. 31C, and the positive electrode lead 934, the positive electrode lead 934a, the negative electrode lead 935a, and the connection lead 939 in fig. 31D are formed by etching.

Fig. 31E is a schematic diagram illustrating a wiring of an LED module according to a fifth preferred embodiment of the present application. In this embodiment, the wiring of the LED module in fig. 31C is changed from a single-layer wiring layer to a double-layer wiring layer, and the positive electrode lead 834a and the negative electrode lead 835a are mainly changed to a second metal layer. The description is as follows.

The first circuit layer 2a of the flexible circuit board is etched to form the positive conductive wire 834, the negative conductive wire 835 and the connecting conductive wire 839 in fig. 31E, so as to electrically connect the LED components 831, for example: the LED modules are electrically connected in a mesh, and the second circuit layer 2c is etched to form positive and negative leads 834a, 835a to electrically connect (the filter output terminals of) the filter circuit. The positive electrode lead 834 and the negative electrode lead 835 of the first circuit layer 2a of the flexible circuit board have layer connection points 834b and 835b. The positive electrode lead 834a and the negative electrode lead 835a of the second wiring layer 2 have layer connection points 834c and 835c. Layer connection points 834b and 835b are located opposite layer connection points 834c and 835c for electrically connecting positive electrode lead 834 and positive electrode lead 834a, and negative electrode lead 835a. Preferably, the positions of the layer connection points 834b and 835b of the first metal layer are opened to expose the layer connection points 834c and 835c by the formation of an electric layer, and then soldered to electrically connect the positive electrode lead 834 and the positive electrode lead 834a, and the negative electrode lead 835a with each other.

Similarly, the LED module wiring shown in fig. 31D may be modified from the positive electrode lead 934a and the negative electrode lead 935a to a second metal layer to form a double metal layer wiring structure.

It should be noted that the thickness of the second circuit layer of the flexible circuit board with the double-layer conductive layer is preferably thicker than that of the first circuit layer, so that the line loss (voltage drop) on the positive electrode lead and the negative electrode lead can be reduced. In addition, compared with the flexible circuit board with a single metal layer, the flexible circuit board with the double-layer conductive layer has the advantage that the width of the flexible circuit board can be reduced due to the fact that the positive lead and the negative lead at two ends are moved to the second layer. On the same jig, the narrower substrates are discharged more than the wider substrates, so that the production efficiency of the LED module can be improved. The flexible circuit board with double conductive layers is easier to maintain in shape, so as to increase the production reliability, for example: accuracy of the welding position at the time of welding of the LED assembly.

In the present application, the power module may further include an anti-flicker circuit coupled to the filter circuit and configured to flow a current greater than a set anti-flicker current value. The anti-flicker circuit may include, but is not limited to, the anti-flicker circuit 550 in the following embodiments.

Fig. 32A is a schematic block diagram of an application circuit of a power module of an LED straight tube lamp according to a sixth preferred embodiment of the present application. Compared to the embodiment shown in fig. 28E, the present embodiment includes the first rectifying circuit 510, the second rectifying circuit 540, the filtering circuit 520, and the LED driving module 530, and further includes the anti-flicker circuit 550. The anti-flicker circuit 550 is coupled between the filter circuit 520 and the LED driving module 530. The second rectifying circuit 540 is an omitted circuit, and is shown by a dotted line in the figure.

The anti-flicker circuit 550 is coupled to the first filter output 521 and the second filter output 522 to receive the filtered signal and consume a portion of the energy of the filtered signal when at least a specific condition is met, so as to inhibit the occurrence of a lighting interruption of the LED driving module 530 caused by a ripple of the filtered signal. In general, the filter circuit 520 has a filter element such as a capacitor or an inductor, or has a parasitic capacitor and an inductance on the circuit, so as to form a resonant circuit. When the supply of the ac power signal is stopped, the resonant circuit is as follows: after the user turns off the power supply of the LED straight tube lamp, the amplitude of the resonance signal of the LED straight tube lamp is reduced along with time. However, the LED module of the LED straight tube lamp is a unidirectional conduction component and has the lowest on-voltage. When the trough value of the resonance signal is lower than the minimum conduction voltage of the LED module and the crest value is still higher than the minimum conduction voltage of the LED module, the LED module emits light to generate a flickering phenomenon. The anti-flicker circuit is suitable for and can flow a current larger than a set anti-flicker current value at the moment, consumes part of energy of the filtered signal, and is higher than the energy difference between the crest value and the trough value of the resonance signal, so that the flicker phenomenon of light emission of the LED module is restrained. Preferably, when the filtered signal is close to the minimum turn-on voltage of the LED module, the anti-flicker circuit consumes a portion of the energy of the filtered signal that is higher than the energy difference between the peak and trough values of the resonant signal.

Notably, the anti-flicker circuit 550 is more suitable for implementations in which the LED driver module 530 does not include the driver circuit 1530. That is, when the LED driving module 530 includes the LED module 630, the LED module 630 directly drives the light by the filtered signal of the filter circuit. The light emission of the LED module 630 will vary directly reflecting the ripple of the filtered signal. The provision of the anti-flicker circuit 550 will suppress the flickering phenomenon that occurs in the LED straight tube lamp after the LED straight tube lamp is powered off.

Referring to FIG. 32B, a circuit diagram of an anti-flicker circuit according to a preferred embodiment of the present application is shown. The anti-flicker circuit 650 may include at least one resistor, such as: two resistors in series are connected in series between the first filter output 521 and the second filter output 522. In this embodiment, the anti-flicker circuit 650 continues to consume a portion of the energy of the filtered signal. In normal operation, this portion of the energy is much less than the energy consumed by the LED driving module 530. However, when the level of the filtered signal drops near the minimum turn-on voltage of the LED module 630 after the power is turned off, the anti-flicker circuit 650 still consumes a portion of the energy of the filtered signal to reduce intermittent light emission of the LED module 630. In a preferred embodiment, the anti-flicker circuit 650 may be configured to flow a flicker-preventing current greater than or equal to a minimum on-voltage of the LED module 630, and accordingly determine an equivalent flicker-preventing resistance value of the anti-flicker circuit 650.

In the application, the power supply module can also comprise a filament simulation circuit; the filament simulation circuit is coupled with the conductive needle and is used for detecting whether the LED light source is normally lightened when the power supply module is started. The filament simulation circuit can comprise at least one capacitor and resistor which are connected in parallel; the two ends of the capacitor and the resistor are respectively coupled with the conductive pin. The filament emulation circuit may include the filament emulation circuit 1560 in the various embodiments described below, but is not limited thereto.

Fig. 33A is a schematic block diagram of an application circuit of a power module of an LED straight tube lamp according to a seventh preferred embodiment of the application. Compared to the embodiment shown in fig. 28E, the LED straight tube lamp of the present embodiment includes the first rectifying circuit 510, the second rectifying circuit 540, the filtering circuit 520, and the LED driving module 530, and further includes the two filament emulation circuit 1560. Two filament emulation circuits 1560 are respectively coupled between the first pin 501 and the second pin 502 and between the third pin 503 and the fourth pin 504 for improving the compatibility of the lamp driving circuit with filament detection, for example: the electronic ballast with the preheating function.

The lamp driving circuit with filament detection detects whether the filament of the lamp is normal or not without short circuit or open circuit at the beginning of starting. When the lamp filament is judged to be abnormal, the lamp tube driving circuit is stopped and enters a protection state. In order to avoid the abnormal judgment of the LED straight tube lamp by the lamp tube driving circuit, the two filament simulation circuits 1560 can simulate normal filaments, so that the lamp tube driving circuit can normally start to drive the LED straight tube lamp to emit light.

Fig. 33B is a circuit diagram of a filament simulation circuit according to a first preferred embodiment of the present application. Filament emulation circuit 1660 includes a capacitor 1663 and a resistor 1665 connected in parallel, and respective ends of capacitor 1663 and resistor 1665 are coupled to filament emulation terminals 1661 and 1662, respectively. Referring to fig. 33A, filament emulation terminals 1661 and 1662 of the two filament emulation circuit 1660 are coupled to the first pin 501 and the second pin 502, and the third pin 503 and the fourth pin 504. When the lamp driving circuit outputs the detection signal to test whether the filament is normal, the detection signal passes through the capacitor 1663 and the resistor 1665 connected in parallel to make the lamp driving circuit determine that the filament is normal.

It is noted that the capacitance of the capacitor 1663 is small. Therefore, when the lamp driving circuit formally drives the high-frequency ac signal outputted from the LED straight tube lamp, the capacitance (equivalent resistance) of the capacitor 1663 is far smaller than the resistance of the resistor 1665. Thereby, the filament emulation circuit 1660 consumes relatively little power while the LED straight tube lamp is operating normally without affecting the luminous efficiency of the LED straight tube lamp.

Fig. 33C is a schematic circuit diagram of a filament simulation circuit according to a second preferred embodiment of the present application. In the present embodiment, the first rectifying circuit 510 and/or the second rectifying circuit 540 adopt the rectifying circuit 810 shown in fig. 29C, but the end point conversion circuit 541 is omitted, and the filament simulation circuit 1660 replaces the end point conversion circuit 541. That is, the filament simulation circuit 1660 of the present embodiment has both filament simulation and endpoint conversion functions. Referring to fig. 33A, filament emulation terminals 1661 and 1662 of filament emulation circuit 1660 are coupled to first pin 501 and second pin 502 or/and third pin 503 and fourth pin 504. The half-wave connection point 819 of the rectifying unit 815 in the rectifying circuit 810 is coupled to the filament analog end 1662.

Fig. 33D is a schematic circuit diagram of a filament simulation circuit according to a third preferred embodiment of the present application. Compared with the embodiment shown in fig. 33C, the half-wave connection point 819 is instead coupled to the filament analog end 1661, and the filament emulation circuit 1660 of the present embodiment still has both filament emulation and endpoint conversion functions.

Fig. 33E is a circuit diagram of a filament simulation circuit according to a fourth preferred embodiment of the present application. Filament emulation circuit 1760 includes capacitors 1763 and 1764, and resistors 1765 and 1766. Capacitances 1763 and 1764 are connected in series between filament analog ends 1661 and 1662. Resistors 1765 and 1766 are also connected in series between filament analog ends 1661 and 1662, and the junction of resistors 1765 and 1766 is coupled to the junction of capacitors 1763 and 1764. Referring to fig. 33A, filament emulation terminals 1661 and 1662 of the two-filament emulation circuit 1760 are coupled to the first pin 501 and the second pin 502, and the third pin 503 and the fourth pin 504. When the lamp driving circuit outputs the detection signal to test whether the filament is normal, the detection signal passes through the capacitors 1763 and 1764 and the resistors 1765 and 1766 connected in series to make the lamp driving circuit determine that the filament is normal.

It is noted that the capacitances 1763 and 1764 have small values. Therefore, when the lamp driving circuit formally drives the high-frequency ac signal outputted from the LED straight tube lamp, the capacitance of the capacitors 1763 and 1764 connected in series is far smaller than the resistance of the resistors 1765 and 1766 connected in series. Thereby, the filament emulation circuit 1760 consumes relatively little power while the LED straight tube lamp is operating normally without affecting the luminous efficiency of the LED straight tube lamp. Furthermore, any one of the capacitor 1763 or the resistor 1765 is opened or shorted, or any one of the capacitor 1764 or the resistor 1766 is opened or shorted, the detection signal outputted from the lamp driving circuit can still flow between the filament analog terminals 1661 and 1662. Thus, either the capacitor 1763 or the resistor 1765 is open or shorted and/or either the capacitor 1764 or the resistor 1766 is open or shorted, the filament emulation circuit 1760 can still function normally with a relatively high fault tolerance.

In the embodiment of the filament simulation circuit, the current flowing through the filament simulation circuit is preferably less than 1A. The capacitor may be a ceramic capacitor or a metallized polypropylene capacitor, for example: class2 ceramic capacitor, X2 metallized polypropylene capacitor. When the capacitor is an X2 capacitor, the capacitance is smaller than 100nF, and the internal resistance is low. Therefore, the current flowing through the filament simulation circuit 1760 can be reduced to 10-100mA, and the loss is reduced; the heat caused by the internal resistance is small, and the temperature can be more than 70 degrees and even between 50 and 60 degrees.

When the circuit is designed to use the flexible substrate to enable the active and passive components of the LED component and the power module to be respectively or partially provided with the same flexible substrate or different flexible substrates, so as to simplify the structural design of the LED straight tube lamp, the capacitor is preferably an X7R patch ceramic capacitor, and the capacitance value is preferably more than 100nF, and the current flowing through the filament simulation circuit 1760 is 100-1000mA.

Fig. 33F is a circuit diagram of a filament simulation circuit according to a fifth preferred embodiment of the present application. In the present embodiment, the first rectifying circuit 510 and/or the second rectifying circuit 540 adopt the rectifying circuit 810 shown in fig. 29C, but the end point converting circuit 541 is omitted, and the filament simulating circuit 1860 replaces the end point converting circuit 541. That is, the filament simulation circuit 1860 of the present embodiment also has both filament simulation and endpoint conversion functions. The filament emulation circuit 1860 has a negative temperature coefficient of resistance, which is lower when the temperature is high than when the temperature is low. In this embodiment, the filament emulation circuit 1860 includes two negative temperature coefficient resistors 1863 and 1864 connected in series between filament emulation terminals 1661 and 1662. Referring to fig. 33A, filament emulation terminals 1661 and 1662 of filament emulation circuit 1860 are coupled to first pin 501 and second pin 502 or/and third pin 503 and fourth pin 504. The half-wave connection point 819 of the rectifying unit 815 in the rectifying circuit 810 is coupled to the connection point of the negative temperature coefficient resistors 1863 and 1864.

When the lamp driving circuit outputs the detection signal to test whether the filament is normal, the detection signal passes through the negative temperature coefficient resistors 1863 and 1864 to make the lamp driving circuit determine that the filament is normal. And the negative temperature coefficient resistors 1863 and 1864 gradually increase and decrease the resistance value due to the test signal or the preheating process. When the lamp driving circuit formally drives the LED straight tube lamp to emit light, the resistance values of the negative temperature coefficient resistors 1863 and 1864 are reduced to relatively low values, so that the loss of power consumption is reduced.

The resistance of the filament simulation circuit 1860 is preferably 10 ohm or more at room temperature of 25 ℃ and the resistance of the filament simulation circuit 1860 is reduced to 2 to 10 ohm when the LED straight tube lamp is stably operated; more preferably, the resistance of the filament emulation circuit 1860 is between 3 to 6 ohms when the LED straight tube lamp is operating stably.

In the application, the power supply module can further comprise an overvoltage protection circuit; the overvoltage protection circuit is coupled to the first filtering output end and the second filtering output end of the filtering circuit, and performs overvoltage protection when the level of the filtered signal is higher than a set overvoltage value. The overvoltage protection circuit may include, but is not limited to, an overvoltage protection circuit 1570 in various embodiments described below.

Fig. 34A is a schematic block diagram of an application circuit of a power module of an LED straight tube lamp according to an eighth preferred embodiment of the present application. Compared to the embodiment shown in fig. 28E, the LED straight tube lamp of the present embodiment includes the first rectifying circuit 510, the second rectifying circuit 540, the filtering circuit 520, and the LED driving module 530, and an overvoltage protection circuit 1570 is further added. The overvoltage protection circuit 1570 is coupled to the first filter output 521 and the second filter output 522 to detect the filtered signal and clamp the level of the filtered signal when the level of the filtered signal is higher than a set overvoltage value. Thus, the overvoltage protection circuit 1570 may protect components of the LED driver module 530 from damage due to excessive voltages. The second rectifying circuit 540 is omitted, and is shown by a dotted line in the drawing.

Fig. 34B is a schematic circuit diagram of an overvoltage protection circuit according to a preferred embodiment of the application. The overvoltage protection circuit 1670 includes a zener diode 1671, for example: a Zener Diode (Zener Diode) is coupled to the first filter output 521 and the second filter output 522. The zener diode 1671 is turned on when the voltage difference between the first filter output 521 and the second filter output 522 (i.e., the level of the filtered signal) reaches the breakdown voltage, so that the voltage difference is clamped on the breakdown voltage. The overvoltage protection circuit 1670 may avoid, for example: the momentary start type (INSTANT START) electronic ballast outputs a high ac voltage for a short period of time at the start-up, etc., and the temporary high voltage causes damage to the LED driving module 530. The protection voltage of the overvoltage protection circuit 1670 (or the breakdown voltage of the zener diode 1671) is preferably lower than 500V, for example: in the range of 100-500V, more preferably below 400V, for example: 300-400V.

The implementation of the LED straight tube lamp of the application in various embodiments is as described above. It should be noted that, in each embodiment, for the same LED straight tube lamp, in the characteristics of "the tube and the lamp cap are fixed by using a high thermal conductivity silica gel", "the tube is covered by the heat shrink tube", "the lamp plate adopts the flexible circuit soft board", "the flexible circuit soft board is a single-layer patterned metal circuit layer structure or a double-layer structure of a single-layer patterned metal circuit layer plus a dielectric layer", "the flexible circuit soft board includes a free portion or no free portion for electrical connection", "the inner peripheral surface of the tube is coated with an adhesive film", "the inner peripheral surface of the tube is coated with a diffusion film", "the outer cover of the light source is coated with a diffusion film", "the inner wall of the tube is coated with a reflective film", "the light source has a bracket", "the power source has an assembly of a long and short circuit board", "the lamp tube is provided with a lamp cap with a protection moving structure", "the rectifying circuit", "the filter circuit", "the endpoint conversion circuit", "the anti-flash circuit", "the filament simulation circuit", etc., one or more of the technical features may be included.

In addition, the content of the flexible circuit board, the flexible circuit board is a single-layer patterned metal circuit layer structure or a double-layer structure of a single-layer patterned metal circuit layer and a dielectric layer can be selected from one of the related technical characteristics or a combination thereof in the embodiment, the content of the light tube and the lamp cap fixed by using a high-heat-conductivity silica gel can be selected from one of the related technical characteristics or a combination thereof in the embodiment, the content of the light tube covered by the heat-shrinkable tube can be selected from one of the related technical characteristics or a combination thereof in the embodiment, the content of the light tube inner peripheral surface coated with an adhesive film can be selected from one of the related technical characteristics or a combination thereof in the embodiment, the content of the light tube inner peripheral surface coated with a diffusion film can be selected from one of the related technical characteristics or a combination thereof in the embodiment, the content of the light source outer cover can be selected from one of the related characteristics or a combination thereof in the embodiment, and the content of the light source outer cover can be selected from one of the related characteristics or a combination thereof in the embodiment can be selected from one of the related characteristics of the light source.

For example, in the case that the lamp board is a flexible circuit board, the flexible circuit board is connected with the output end of the power supply through wire bonding or welded with the output end of the power supply. In addition, the flexible circuit soft board is of a single-layer patterned metal circuit layer structure or a double-layer structure of a single-layer patterned metal circuit layer and a dielectric layer; the flexible circuit board comprises a free part and can be directly and electrically connected with a power supply through a single-layer patterned metal circuit layer structure or a double-layer structure of a single-layer patterned metal circuit layer and a dielectric layer without the free part, and the flexible circuit board can be coated with a circuit protection layer of ink material on the surface and realize the function of a reflecting film by increasing the width along the circumferential direction.

For example, in the case where the inner peripheral surface of the lamp tube is coated with a diffusion film, the constituent components of the diffusion coating include at least one of calcium carbonate, calcium halophosphate, and aluminum oxide, and a thickener and ceramic activated carbon. In addition, the diffusion film can also be a diffusion film and is covered outside the light source.

For example, in the case where the inner wall of the lamp tube is coated with a reflective film, the light source may be disposed on the reflective film, in the reflective film opening, or at the side of the reflective film.

For example, in a light source design, the light source includes a holder having a recess, and an LED die disposed in the recess; the bracket is provided with a first side wall and a second side wall, the first side wall is arranged along the length direction of the lamp tube, the second side wall is arranged along the width direction of the lamp tube, and the first side wall is lower than the second side wall.

For example, in a power supply design, an assembly of long and short circuit boards has a long circuit board and a short circuit board, the long circuit board and the short circuit board are attached to each other and fixed by an adhesive manner, and the short circuit board is located near the periphery of the long circuit board. The short circuit board is provided with a power module, and the whole power module forms a power supply.

In the rectifying circuit design of the power module, the power module can be provided with a single rectifying unit or double rectifying units. The first rectifying unit and the second rectifying unit in the double rectifying circuit are respectively coupled with pins of lamp caps arranged at two ends of the LED straight tube lamp. The single rectifying unit is applicable to the driving architecture of the single-ended power supply, and the double rectifying unit is applicable to the driving architecture of the single-ended power supply and the double-ended power supply. And when at least one rectifying unit is arranged, the device can be suitable for the driving environment of low-frequency alternating current signals, high-frequency alternating current signals or direct current signals.

The single rectification circuit may be a half-wave rectification circuit or a full-wave rectification circuit. The double rectification unit can be a double half-wave rectification circuit, a double full-wave rectification circuit or a combination of each of the half-wave rectification circuit and the full-wave rectification circuit.

In the pin design of the LED straight tube lamp, the LED straight tube lamp may be configured of single-ended double pins (two pins in total, no pin at the other end), double-ended single pins (two pins in total), and double-ended double pins (four pins in total). Under the framework of single-end double pins and double-end single pins, the method is applicable to the rectification circuit design of a single rectification circuit. Under the structure of each double-end double-pin, the structure is applicable to the rectification circuit design of the double-rectification circuit, and any pin of each double-end or any single-end double pin is used for receiving external driving signals.

In the filter circuit design of the power module, a single capacitor or pi-type filter circuit can be provided to filter out high frequency components in the rectified signal, and a low ripple DC signal is provided as a filtered signal. The filter circuit may also include an LC filter circuit to present a high impedance to a particular frequency to meet UL certification current size specifications for the particular frequency. Furthermore, the filter circuit may further include a filter unit coupled between the pin and the rectifying circuit to reduce electromagnetic interference caused by the circuit of the LED straight tube lamp. When the direct current signal is used as an external driving signal, the power module of the LED straight tube lamp can omit the filter circuit.

In addition, a protection circuit may be additionally added to protect the LED module. The protection circuit can detect the current or/and the voltage of the LED module to correspondingly start corresponding overcurrent or overvoltage protection.

In the filament simulation circuit design of the power supply module, the filament simulation circuit can be a single parallel capacitor and resistor or a double parallel capacitor and resistor or a negative temperature coefficient circuit. The filament simulation circuit is suitable for the program preheating starting type electronic ballast, can avoid the problem that the program preheating starting type electronic ballast judges that the filament is abnormal, and improves the compatibility of the program preheating starting type electronic ballast. And the filament simulation circuit hardly influences the compatibility of other electronic ballasts such as an instant start type (INSTANT START) electronic ballast, a quick start type (RAPID START) electronic ballast and the like.

Any numerical value recited herein includes all values of the lower and upper values that increment by one unit from the lower value to the upper value, as long as there is a spacing of at least two units between any lower value and any higher value. For example, if it is stated that the number of components or the value of a process variable (e.g., temperature, pressure, time, etc.) is from 1 to 90, preferably from 20 to 80, more preferably from 30 to 70, then the purpose is to explicitly list such values as 15 to 85, 22 to 68, 43 to 51, 30 to 32, etc. in this specification as well. For values less than 1, one unit is suitably considered to be 0.0001, 0.001, 0.01, 0.1. These are merely examples that are intended to be explicitly recited in this description, and all possible combinations of values recited between the lowest value and the highest value are believed to be explicitly stated in the description in a similar manner.

Unless otherwise indicated, all ranges include endpoints and all numbers between endpoints. "about" or "approximately" as used with a range is applicable to both endpoints of the range. Thus, "about 20 to 30" is intended to cover "about 20 to about 30," including at least the indicated endpoints.

All articles and references, including patent applications and publications, disclosed herein are incorporated by reference for all purposes. The term "consisting essentially of …" describing a combination shall include the identified component, ingredient, component or step as well as other components, ingredients, components or steps that do not substantially affect the essential novel features of the combination. The use of the terms "comprises" or "comprising" to describe combinations of components, elements, components or steps herein also contemplates embodiments consisting essentially of such components, elements, components or steps. By using the term "may" herein, it is intended that any attribute described as "may" be included is optional.

Multiple components, ingredients, components or steps can be provided by a single integrated component, ingredient, component or step. Alternatively, a single integrated component, ingredient, part or step may be divided into separate plural components, ingredients, parts or steps. The disclosure of "a" or "an" to describe a component, ingredient, component or step is not to be taken as excluding other components, ingredients, components or steps.

It is to be understood that the above description is intended to be illustrative, and not restrictive. Many embodiments and many applications other than the examples provided will be apparent to those of skill in the art upon reading the above description. The scope of the present teachings should, therefore, be determined not with reference to the above description, but instead should be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. The disclosures of all articles and references, including patent applications and publications, are incorporated herein by reference for the purpose of completeness. The omission of any aspect of the subject matter disclosed herein in the preceding claims is not intended to forego such subject matter, nor should the inventors regard such subject matter as not be considered to be part of the disclosed subject matter.

Claims

1. An LED straight tube lamp, comprising:

the lamp tube is provided with two ends, and the lamp tube is made of glass;

A lamp board accommodated in the lamp tube, at least one LED light source is arranged on the lamp board, the lamp board is a flexible circuit soft board, the end part of the soft board, which is not fixed in the lamp tube, forms a free part, and at least one light source bonding pad is arranged on the free part;

a power supply module capable of providing power to the LED light source on the lamp panel, the power supply module is provided with a power supply pad corresponding to the light source pad, one of the light source pad and the power supply pad is provided with a through hole, the light source pad and the power supply pad are correspondingly welded,

the LED straight tube lamp further comprises

A diffusion film through which light generated by the at least one LED light source can pass;

and the reflecting film is circumferentially arranged on part of the inner circumferential surface of the lamp tube.

2. The LED straight tube lamp of claim 1, wherein: the diffusion film comprises

3. The LED straight tube lamp of claim 1, wherein: the diffusion film comprises

And the diffusion coating is coated on the surface of the LED light source.

4. The LED straight tube lamp of claim 1, wherein: the material of the diffusion film comprises at least one of calcium carbonate, calcium halophosphate, strontium phosphate and aluminum oxide.

5. The LED straight tube lamp of claim 1, wherein: the diffusion membrane comprises a diffusion membrane covered outside the LED light source; the diffusion membrane is not in contact with the LED light source.

6. The LED straight tube lamp of claim 1, wherein: the protection element comprises at least two current limiters or safety resistors, and each current limiter or safety resistor is connected with each conductive needle in a one-to-one correspondence manner.

7. The LED straight tube lamp of claim 1, wherein: the diffusion film has a thickness of 20 to 30 microns and a light transmittance of 85 to 95%.

8. The LED straight tube lamp of claim 1, wherein: the diffusion film has a thickness of 200 to 300 micrometers and a light transmittance of 92 to 94%.

9. The LED straight tube lamp of claim 1, wherein: the protection element comprises at least two fuses, and each fuse is connected with each conductive needle in a one-to-one correspondence manner.

10. The LED straight tube lamp of any of claims 1-9, wherein: the outer diameter of the lamp cap assembly is approximately equal to the outer diameter of the lamp tube.

11. The LED straight tube lamp of any of claims 1-9, wherein: the inner surface of the lamp tube is a rough surface, and the roughness of the inner surface is 0.1-40 microns.

12. The LED straight tube lamp of any of claims 1-9, wherein: the lamp tube is fixedly connected with the lamp cap assembly through silica gel with the heat conductivity coefficient larger than 0.7 w/m.k.

13. The LED straight tube lamp of claim 10, wherein: and the lamp tube is wrapped with a heat shrinkage tube.

14. The LED straight tube lamp of claim 13, wherein: the thickness of the heat shrinkage tube is 20-200 mu m.

15. The LED straight tube lamp of claim 1, wherein: the ratio of the length of the reflective film along the circumferential direction of the lamp tube to the circumference of the inner circumferential surface of the lamp tube is in the range of 0.3 to 0.5.

16. The LED straight tube lamp of claim 15, wherein: the thickness of the reflective film is 140 micrometers to 350 micrometers.

17. The LED straight tube lamp of claim 1, wherein: the lamp panel also comprises an adhesive sheet, a lamp panel insulating film and a light source film; the lamp panel is adhered to the inner surface of the lamp tube through the adhesive sheet, and the lamp panel insulating film is coated on the surface of the lamp panel facing the LED light source; the light source film is coated on the surface of the light source.

18. The LED straight tube lamp of claim 1, wherein: the lamp tube also comprises an adhesive film, wherein the adhesive film is coated on the outer peripheral surface or the inner peripheral surface of the lamp tube and can adhere fragments together when the lamp tube is broken.

19. An LED straight tube lamp as set forth in claim 18, wherein: the adhesive film has a thickness of 100 to 140 micrometers.

20. The LED straight tube lamp of claim 1, wherein: the lamp panel comprises a metal circuit layer electrically connected with the power supply module, and the LED light source is arranged on the metal circuit layer.

21. The LED straight tube lamp of claim 20, wherein: the lamp panel also comprises a dielectric layer overlapped with the metal circuit layer.

22. The LED straight tube lamp of claim 1, wherein: the outer surface of the lamp panel is coated with a circuit protection layer.

23. The LED straight tube lamp of claim 1 or 16, wherein: the power supply module is arranged on the circuit board to form a power supply assembly; the power supply assembly is electrically connected with the lamp panel through welding.

24. The LED straight tube lamp of claim 1, wherein: the LED light source comprises a bracket with a groove and an LED crystal grain arranged in the groove.

25. The LED straight tube lamp of claim 24, wherein: the ratio of the length to the width of the LED die ranges from 2:1 to 10:1.

26. The LED straight tube lamp of claim 25, wherein: the bracket is provided with a first side wall extending along the width direction of the lamp tube and a second side wall extending along the length direction of the lamp tube; the first side wall and the second side wall form the groove; the first sidewall is lower than the second sidewall.

27. The LED straight tube lamp as in claim 26 wherein: the first side wall is provided with a slope, and the included angle between the slope and the bottom wall of the groove is 105-165 degrees.

28. The LED straight tube lamp of claim 1, wherein: the power module includes:

29. The LED straight tube lamp of claim 28, wherein: the power module further comprises an anti-flicker circuit coupled to the filter circuit and configured to flow a current greater than a set anti-flicker current value.

30. The LED straight tube lamp of claim 29, wherein: the anti-flicker circuit comprises at least one resistor.

31. The LED straight tube lamp of claim 28, wherein: the rectification circuit is a full-wave rectification circuit.

32. The LED straight tube lamp of claim 28, wherein: the power supply module further comprises a filament simulation circuit; the filament simulation circuit is coupled with the conductive needle and is used for detecting whether the LED light source is normally lightened when the power supply module is started.

33. The LED straight tube lamp of claim 32, wherein: the filament simulation circuit comprises at least one capacitor and at least one resistor which are connected in parallel; the two ends of the capacitor and the resistor are respectively coupled with the conductive pin.

34. The LED straight tube lamp of claim 28, wherein: the power supply module further comprises an overvoltage protection circuit; the overvoltage protection circuit is coupled to the first filtering output end and the second filtering output end of the filtering circuit, and performs overvoltage protection when the level of the filtered signal is higher than a set overvoltage value.

35. The LED straight tube lamp of claim 34, wherein the overvoltage protection circuit comprises at least one zener diode.