CN205584535U - Lamp - Google Patents
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- CN205584535U CN205584535U CN201620005863.2U CN201620005863U CN205584535U CN 205584535 U CN205584535 U CN 205584535U CN 201620005863 U CN201620005863 U CN 201620005863U CN 205584535 U CN205584535 U CN 205584535U
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The utility model discloses a lamp, including 1 the 1st rectifier circuit, a filter circuit and a LED drive module. A rectifier circuit is used for producing signal after the rectification. Filter circuit has 1 the 1st filtered output end and 1 the 2nd filtered output end, and is used for producing a post -filter signal. LED drive module with filter circuit is coupled, and contains a drive circuit and a LED module, wherein drive circuit has a first drive output and second drive output, and by the configuration in order to receive the post -filter signal and produce one the drive signal, and the LED module is disposed in order to receive drive the signal and give out light, give off light. Lamp also includes a mode switching circuit, is coupled filtered output end and the 2nd filtered output end at least one of them and be coupled first drive output and second drive output at least one of them for the 1st drive mode or 1 the 2nd drive mode are carried out in the decision.
Description
Technical Field
The utility model relates to a lighting apparatus field, concretely relates to lamp.
Background
LED lighting technology is rapidly advancing to replace conventional incandescent and fluorescent lamps. Compared with a fluorescent lamp filled with inert gas and mercury, the LED straight lamp does not need to be filled with mercury. Therefore, LED straight tube lamps have become a highly desirable lighting option unintentionally in various lighting systems for home or work use dominated by lighting options such as conventional fluorescent bulbs and tubes. Advantages of LED straight lamps include improved durability and longevity and lower power consumption. Therefore, a LED straight tube lamp would be a cost effective lighting option, taking all factors into account.
The known LED straight lamp generally includes a lamp tube, a circuit board disposed in the lamp tube and having a light source, and lamp caps disposed at two ends of the lamp tube, wherein a power supply is disposed in the lamp caps, and the light source and the power supply are electrically connected through the circuit board. However, the existing LED straight tube lamp still has some quality problems to be solved.
In the circuit design of the existing LED straight tube lamp, no adequate solution is provided for the compatibility between the compliance with the relevant certification specifications and the driving architecture of the existing fluorescent lamp using the electronic ballast. For example, the fluorescent lamp has no electronic components inside, and is quite simple in terms of meeting the UL certification and EMI specifications of the lighting equipment. However, the LED straight lamp has a lot of electronic components inside the lamp, and it is important to consider the influence caused by the layout among the electronic components, so that it is not easy to conform to the UL certification and EMI specifications.
Commercially available electronic ballasts can be mainly classified into an Instant Start (Instant Start) electronic ballast and a warm Start (Program Start) electronic ballast. The electronic ballast is provided with a resonant circuit, the driving design of the resonant circuit is matched with the load characteristic of the fluorescent lamp, namely the electronic ballast is a capacitive component before the fluorescent lamp is lightened and is a resistive component after the fluorescent lamp is lightened, and a corresponding starting program is provided, so that the fluorescent lamp can be correctly lightened. And the LED is a nonlinear component, and has completely different characteristics from the fluorescent lamp. Therefore, the LED straight tube lamp affects the resonant design of the electronic ballast, which causes compatibility problems. Generally, the preheat-start electronic ballast detects the filament, and the conventional LED driving circuit cannot support the filament, so that the filament cannot be started due to detection failure. In addition, the electronic ballast is equivalently a current source, and when the electronic ballast is used as a power supply of a direct current-to-direct current converter of the LED straight tube lamp, overcurrent overvoltage or undercurrent undervoltage is easily caused, so that electronic components are damaged or the LED straight tube lamp cannot stably provide illumination.
Furthermore, the driving signal for driving the LED is a dc signal, while the driving signal for the fluorescent lamp is a low-frequency and low-voltage ac signal of the commercial power or a high-frequency and high-voltage ac signal of the electronic ballast, and even when the fluorescent lamp is applied to emergency lighting, the battery for emergency lighting is a dc signal. The voltage and frequency range difference between different driving signals is large, and the driving signals can be compatible without simple rectification.
In view of the above problems, there is a need to adjust and use a suitable driving mode of a power supply assembly of an LED lamp according to different application environments or driving systems, so as to improve compatibility of the LED lamp with various driving systems. Therefore, the present disclosure provides a utility model and embodiments thereof, which are described as follows.
SUMMERY OF THE UTILITY MODEL
This abstract describes many embodiments of the invention. The term "present invention" is used merely to describe some embodiments disclosed in this specification (whether or not in the claims), and not a complete description of all possible embodiments. Certain embodiments of various features or aspects described below as "the present invention" may be combined in various ways to form an LED straight tube lamp or a portion thereof.
The utility model provides a new LED straight tube lamp to and its each aspect (and characteristic), in order to solve above-mentioned problem.
A lamp, comprising: a lamp tube for receiving an external driving signal;
the first rectifying circuit is used for rectifying the external driving signal to generate a rectified signal; a filter circuit coupled to the first rectifying circuit, the filter circuit having a first filter output terminal and a second filter output terminal and being configured to filter the rectified signal to generate a filtered signal; an LED driving module coupled to the filter circuit and including a driving circuit and an LED module, wherein the driving circuit has a first driving output terminal and a second driving output terminal and is configured to receive the filtered signal and generate a driving signal, and the LED module is configured to receive the driving signal and emit light; and a mode switching circuit coupled to at least one of the first filter output terminal and the second filter output terminal and to at least one of the first driving output terminal and the second driving output terminal for determining a first driving mode or a second driving mode; in the first driving mode, the filtered signal is input to the driving circuit, and in the second driving mode, the filtered signal is input to and drives the LED module to bypass a component of the driving circuit.
Optionally, the lamp is an LED lamp.
Optionally, the lamp is an LED straight lamp.
Optionally, the mode switching circuit determines to directly input the filtered signal to the driving circuit or directly to the LED module according to the frequency of the external driving signal.
Optionally, the mode switching circuit directly inputs the filtered signal to the LED module when the frequency of the external driving signal is higher than a predetermined mode switching frequency, and directly inputs the filtered signal to the driving circuit when the frequency of the external driving signal is lower than the predetermined mode switching frequency.
A lamp comprises a lamp tube, a first pin, a second pin, a first rectifying circuit, a second rectifying circuit, a filter circuit, an LED driving module and a mode switching circuit; the first pin and the second pin are coupled with the lamp tube and used for receiving an external driving signal; the first rectifying circuit is used for rectifying the external driving signal to generate a rectified signal; the filter circuit is provided with a first filter output end and a second filter output end and is used for filtering the rectified signal to generate a filtered signal; the LED driver module comprises a driver circuit (1530) and an LED module (630), the driver circuit having a first drive output and a second drive output (1522); the mode switching circuit is coupled; at least one of the first filter output terminal and the second filter output terminal; and at least one of the first driving output end and the second driving output end is used for determining to carry out a first driving mode or a second driving mode.
Optionally, the lamp is an LED lamp.
Optionally, the lamp is an LED straight lamp.
Optionally, the driving circuit is a step-down dc-to-dc conversion circuit, which includes a controller and a conversion circuit, and the conversion circuit includes an inductor, a freewheeling diode, and a switch;
the driving circuit is coupled with the first filtering output end and the second filtering output end so as to drive the LED module coupled between the first driving output end and the second driving output end.
Optionally, the driving circuit is a boost dc-dc conversion circuit, which includes a controller and a conversion circuit,
the conversion circuit comprises an inductor, a freewheeling diode and a change-over switch;
one end of the inductor is coupled with the first filtering output end, and the other end of the inductor is coupled with the anode of the current filtering diode and the first end of the change-over switch;
the second end of the change-over switch is coupled with the second filtering output end and the second driving output end; and the cathode of the freewheeling diode is coupled with the first drive output end.
Optionally, the controller is coupled to the control end of the switch, and controls the switch to be turned on or off according to the current detection signal and/or the current detection signal;
when the change-over switch is conducted, the inductor is in an energy storage state;
When the change-over switch is turned off, the inductor is in an energy release state, and the current of the inductor is reduced along with time; the current of the inductor flows to the LED module through the freewheeling diode.
Optionally, the driving circuit is a step-down dc-to-dc conversion circuit,
comprises a controller and a conversion circuit, wherein the controller is connected with the conversion circuit,
the conversion circuit comprises an inductor, a freewheeling diode and a change-over switch;
the driving circuit is coupled to the first filtering output end and the second filtering output end.
Optionally, the anode of the freewheeling diode is coupled to the second filter output terminal, and the cathode of the freewheeling diode is coupled to the switch;
one end of the inductor is coupled with the second end of the change-over switch, and the other end of the inductor is coupled with the first driving output end;
the second driving output end is coupled with the anode of the freewheeling diode.
Optionally, the first end of the switch is coupled to the first filter output end, the second end of the switch is coupled to the negative electrode of the freewheeling diode, and the control end of the switch is coupled to the controller to receive a control signal from the controller so that the state between the first end and the second end is on or off.
Optionally, the driving circuit is a step-down dc-to-dc conversion circuit, which includes a controller and a conversion circuit,
The conversion circuit comprises an inductor, a freewheeling diode and a change-over switch;
the driving circuit is coupled with the first filtering output end and the second filtering output end;
one end of the inductor is coupled with the first filtering output end and the second driving output end, and the other end of the inductor is coupled with the first end of the selector switch;
the second end of the change-over switch is coupled with the second filtering output end, and the control end is coupled with the controller;
the anode of the freewheeling diode is coupled with the connection point of the inductor and the change-over switch, and the cathode of the freewheeling diode is coupled with the first driving output end.
Optionally, the mode switching circuit comprises a mode switch having a first terminal (683), a second terminal (684), and a third terminal (685),
the first terminal is coupled to the second driving output terminal,
the second terminal is coupled to the second filtered output,
the third terminal is coupled to the inductor.
Optionally, the mode switching circuit comprises
A mode switch having a first end, a second end, a third end,
the first terminal is coupled to the second filter output terminal,
the second terminal is coupled to the second driving output terminal and
The third terminal is coupled to a switch of the driving circuit.
Optionally, the mode switching circuit comprises a mode switch,
the mode switch has a first terminal, a second terminal, and a third terminal,
the first terminal is coupled to the first filter output,
the second terminal is coupled to the first driving output terminal and
the third terminal is coupled to the inductor.
Optionally, the mode switching circuit comprises a mode switch,
the mode switch has a first terminal, a second terminal, and a third terminal,
the first terminal is coupled to the first driving output terminal,
the second terminal is coupled to the first filtering output terminal and
the third terminal is coupled with the cathode of the freewheeling diode.
Optionally, the mode switching circuit comprises a mode switch,
the mode switch has a first terminal, a second terminal, and a third terminal,
the first terminal is coupled to the first filter output,
the second terminal is coupled to the first driving output terminal and
the third terminal is coupled to the switch.
Optionally, the mode switching circuit comprises
A mode switch having a first end, a second end, a third end,
The first terminal is coupled to the first filter output,
the second terminal is coupled to the first driving output terminal and
the third terminal is coupled to the inductor.
Optionally, the mode switching circuit comprises a first mode switch and a second mode switch,
the first mode switch has a first terminal, a second terminal, and a third terminal,
the first terminal is coupled to the first driving output terminal,
the second terminal is coupled to the first filtering output terminal and
the third terminal is coupled with the freewheeling diode;
the second mode switch has a first end, a second end and a third end, wherein the first end is coupled to the second driving output end, the second end is coupled to the second filtering output end, and the third end is coupled to the first filtering output end.
Optionally, the mode switching circuit comprises
A first mode switch and a second mode switch,
the first mode switch has a first terminal, a second terminal, and a third terminal,
the first terminal is coupled to the second filter output terminal, the second terminal is coupled to the second driving output terminal, and the third terminal is coupled to the switch;
The second mode switch has a first end, a second end and a third end, the first end is coupled to the first filter output end, the second end is coupled to the first driving output end, and the third end is coupled to the second driving output end.
Alternatively, the mode changing switch, the first mode changing switch, and the second mode changing switch may be single-pole double-throw switches or two semiconductor switches.
Compared with the prior art, the technical scheme of the utility model can have following advantage or still can contain following characteristic:
the lamp panel can adopt a flexible circuit soft board, so that the lamp tube can not keep a straight tube state after being broken, for example, when the lamp tube is broken into two sections, a user can not think that the lamp tube can be used and can mount the lamp tube by himself, and electric shock accidents are avoided.
Furthermore, the flexible circuit soft board forms a free part at two ends along the axial direction of the lamp tube respectively, and the free part bends and deforms towards the inside of the lamp tube, so that the convenience of assembly and manufacture can be improved.
Furthermore, the flexible circuit soft board is directly welded at the power output ends of the lamp caps at two ends of the LED straight lamp, and the flexible circuit soft board is not easy to break in the moving process.
Furthermore, the power supply can be electrically communicated with the lamp panel through the assembly of the long and short circuit boards, so that the structure of the lamp panel can be strengthened and the lamp panel is not easy to break.
Furthermore, by using different types of power modules, the flexibility of product design and manufacture can be increased.
Drawings
Fig. 1 is a perspective view showing an LED straight lamp according to an embodiment of the present invention;
fig. 1A is a perspective view showing that the lamp caps at both ends of the lamp tube of the LED straight tube lamp according to another embodiment of the present invention have 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 the lamp cap of a LED straight lamp according to an embodiment of the present invention;
FIG. 4 is a perspective view showing the bottom of the base of the LED straight tube lamp of FIG. 3;
FIG. 5 is a perspective view of another embodiment of the present invention, showing another lamp cap structure of a LED straight lamp;
fig. 6 is a cross-sectional plan view showing that the lamp panel of the LED straight lamp according to an embodiment of the present invention is a flexible circuit board, and the end of the flexible circuit board climbs over the transition portion of the lamp tube and is connected to the output end of the power supply by welding;
fig. 7 is a cross-sectional plan view showing a double-layered structure of a flexible circuit board of a lamp panel of an LED straight lamp according to an embodiment of the present invention;
Fig. 8 is a perspective view showing a bonding pad of a flexible circuit board of a lamp panel of an LED straight lamp according to an embodiment of the present invention, the bonding pad being connected to a printed circuit board of a power supply by soldering;
fig. 9 is a plan view showing a pad configuration of a flexible circuit board of a lamp panel of an LED straight lamp according to an embodiment of the present invention;
fig. 10 is a plan view showing a flexible circuit board of a lamp panel of a LED straight lamp according to another embodiment of the present invention, which has 3 pads arranged side by side in a row;
fig. 11 is a plan view showing a flexible circuit board of a lamp panel of a LED straight lamp according to still another embodiment of the present invention, which has 3 pads arranged in two rows;
fig. 12 is a plan view showing a flexible circuit board of a lamp panel of a LED straight lamp according to another embodiment of the present invention, which has 4 pads arranged in a row;
fig. 13 is a plan view showing that the flexible circuit board of the lamp panel of the LED straight lamp according to still another embodiment of the present invention has 4 parallel bonding pads;
fig. 14 is a plan view showing that holes are formed on the bonding pads of the flexible circuit board of the lamp panel of the LED straight lamp according to an embodiment of the present invention;
FIG. 15 is a cross-sectional plan view illustrating a soldering process of a pad of a flexible circuit board and a printed circuit board of a power supply using the lamp panel of FIG. 14;
FIG. 16 is a cross-sectional plan view illustrating a soldering process of a pad of a flexible printed circuit board using the lamp panel of FIG. 14 and a printed circuit board of a power supply, wherein a hole on the pad is close to an edge of the flexible printed circuit board;
fig. 17 is a plan view showing a pad of a flexible circuit board of a lamp panel of an LED straight lamp according to an embodiment of the present invention, the pad having a notch;
FIG. 18 is a plan sectional view showing a partial enlarged section taken along line A-A' in FIG. 17;
fig. 19 is a perspective view showing that a flexible circuit board of a lamp panel of an LED straight lamp according to another embodiment of the present invention is combined with a printed circuit board of a power supply to form a circuit board assembly;
FIG. 20 is a perspective view illustrating another configuration of the circuit board assembly of FIG. 19;
FIG. 21 is a perspective view of a power supply in a LED straight lamp according to an embodiment of the present invention;
FIG. 22 is a perspective view of another embodiment of the present invention, showing a power supply circuit board vertically soldered to an aluminum rigid circuit board;
FIG. 23 is a perspective view showing a flexible circuit board of a lamp panel having two circuit layers according to another embodiment of the present invention;
fig. 24A is a schematic diagram of an application circuit block of a power supply module of a LED straight tube lamp according to a first preferred embodiment of the present invention;
Fig. 24B is a schematic diagram of an application circuit block of a power supply module of a LED straight tube lamp according to a second preferred embodiment of the present invention;
fig. 24C is a schematic circuit block diagram of an LED lamp according to a first preferred embodiment of the present invention;
fig. 24D is a schematic diagram of an application circuit block of a power supply module of a LED straight tube lamp according to a third preferred embodiment of the present invention;
fig. 24E is a schematic circuit block diagram of an LED lamp according to a second preferred embodiment of the present invention;
fig. 25A is a schematic diagram of an application circuit block of a power supply module of an LED lamp according to a fourth preferred embodiment of the present invention;
fig. 25B is a circuit diagram of a driving circuit according to the first preferred embodiment of the present invention;
fig. 25C is a circuit diagram of a driving circuit according to a second preferred embodiment of the present invention;
fig. 25D is a circuit diagram of a driving circuit according to a third preferred embodiment of the present invention;
fig. 25E is a circuit diagram of a driving circuit according to a fourth preferred embodiment of the present invention;
fig. 26A is a schematic diagram of an application circuit block of a power supply module of an LED lamp according to a fifth preferred embodiment of the present invention;
fig. 26B is a circuit diagram of a mode switching circuit according to the first preferred embodiment of the present invention;
Fig. 26C is a circuit diagram of a mode switching circuit according to a second preferred embodiment of the present invention;
fig. 26D is a circuit diagram of a mode switching circuit according to a third preferred embodiment of the present invention;
fig. 26E is a circuit diagram of a mode switching circuit according to a fourth preferred embodiment of the present invention;
fig. 26F is a circuit diagram of a mode switching circuit according to a fifth preferred embodiment of the present invention;
fig. 26G is a circuit diagram of a mode switching circuit according to a sixth preferred embodiment of the present invention;
fig. 26H is a circuit diagram of a mode switching circuit according to a seventh preferred embodiment of the present invention;
fig. 26I is a circuit diagram of a mode switching circuit according to an eighth preferred embodiment of the present invention;
Detailed Description
The utility model provides a novel LED straight tube lamp on the basis of glass fluorescent tube to solve the problem and the above-mentioned problem of mentioning in the background art. In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below. The following description of the various embodiments of the present invention is provided for illustration only and is not intended to represent all embodiments of the present invention or to limit the present invention to particular embodiments.
Referring to fig. 1 and 2, an embodiment of the present invention provides an LED straight lamp, including: a fluorescent tube 1, a lamp plate 2 that locates in fluorescent tube 1 to and locate two lamp holders 3 at fluorescent tube 1 both ends respectively. The lamp tubes 1 can be plastic lamp tubes or glass lamp tubes, and the sizes of the lamp heads are the same or different. Referring to fig. 1A, in an embodiment where the sizes of the lamp bases are different, preferably, the size of the smaller lamp base is 30% to 80% of the size of the larger lamp base.
In one embodiment, the lamp tube 1 of the LED straight lamp is a glass lamp tube with a reinforced structure, so as to avoid the problems of the conventional glass lamp that the glass lamp is easy to crack and the electric shock accident is caused by electric leakage, and the plastic lamp is easy to age. In the embodiments of the present invention, the glass lamp tube 1 can be reinforced by a chemical method or a physical method.
Referring to fig. 3 and 4, in an embodiment of the present invention, the lamp head 3 of the LED straight lamp includes an insulating tube 302, a heat conducting portion 303 fixed on an outer peripheral surface of the insulating tube 302, and two hollow conductive pins 301 disposed on the insulating tube 302. The heat conducting portion 303 may be a tubular metal ring.
When the LED straight tube lamp is manufactured, after the end region 101 of the lamp tube 1 is inserted into the lamp cap 3, the axial length of the part of the end region 101 of the lamp tube 1 inserted into the lamp cap 3 occupies between one third and two thirds of the axial length of the heat conducting portion 303, which is beneficial: on one hand, the hollow conductive needle 301 and the heat conducting part 303 are ensured to have enough creepage distance, and the hollow conductive needle and the heat conducting part are not easy to be short-circuited when being electrified, so that people are electric shock and danger is caused; on the other hand, due to the insulating effect of the insulating tube 302, the creepage distance between the hollow conductive needle 301 and the heat conducting part 303 is increased, and the test which causes danger due to electric shock when high voltage passes is easier to pass.
Referring to fig. 5 and 22, in another embodiment, a convex pillar 312 is disposed at an end of the lamp cap 3', a hole is disposed at a top end of the convex pillar 312, and a groove 314 having a depth of 0.1 ± 1% mm is disposed at an outer edge of the convex pillar 312 for positioning the conductive pin 53. The conductive pin 53 can be bent over the groove 314 after passing through the hole of the protruding pillar 312 at the end of the lamp cap 3', and then the protruding pillar 312 is covered by a conductive metal cap 311, so that the conductive pin 53 can be fixed between the protruding pillar 312 and the conductive metal cap 311, in this embodiment, the inner diameter of the conductive metal cap 311 is, for example, 7.56 ± 5% mm, the outer diameter of the protruding pillar 312 is, for example, 7.23 ± 5% mm, and the outer diameter of the conductive pin 53 is, for example, 0.5 ± 1% mm, so that the conductive metal cap 311 can directly and tightly cover the protruding pillar 312 without additionally coating adhesive, and thus the electrical connection between the power supply 5 and the conductive metal cap 311 can be completed.
Referring to fig. 2, 3, 12 and 13, in other embodiments, the lamp cap of the present invention is provided with a hole 304 for heat dissipation. Therefore, heat generated by the power supply module in the lamp holder can be dissipated without causing the inside of the lamp holder to be in a high-temperature state, so that the reliability of components in the lamp holder is prevented from being reduced. Further, the hole for heat dissipation on the lamp holder is arc-shaped. Furthermore, the hole for heat dissipation on the lamp holder is three arcs with different sizes. Furthermore, the hole for heat dissipation on the lamp holder is three arcs gradually changing from small to large. Furthermore, the holes for heat dissipation on the lamp cap can be formed by matching the arc shapes and the arc lines at will.
In other embodiments, the light head includes a power socket (not shown) for mounting a power module.
In other embodiments, the width of the flexible circuit board may be widened, and since the surface of the circuit board includes the circuit protection layer made of the ink material, and the ink material has the function of reflecting light, the circuit board itself may perform the function as the reflective film 12 at the widened portion. Preferably, the ratio between the length of the flexible circuit board extending along the circumferential direction of the lamp tube 2 and the circumference of the inner circumferential surface of the lamp tube 2 ranges from 0.3 to 0.5. The flexible circuit soft board can be coated with a circuit protection layer, the circuit protection layer can be made of an ink material and has the function of increasing reflection, the widened flexible circuit soft board extends towards the circumferential direction by taking the light source as a starting point, and the light of the light source can be concentrated by the widened part.
Further, the lamp panel 2 may be any one of a strip-shaped aluminum substrate, an FR4 board, or a flexible circuit board. Since the lamp tube 1 of the present embodiment is a glass lamp tube, if the lamp panel 2 is made of a rigid strip-shaped aluminum substrate or FR4 board, when the lamp tube is broken, for example, cut into two sections, the whole lamp tube can still be kept in a straight tube state, and at this time, a user may think that the LED straight tube lamp can also be used and installed by himself, which is likely to cause an electric shock accident. Because the flexible circuit soft board has the characteristics of strong flexibility and easy bending, and the problem that the flexibility and the bending property of the rigid strip aluminum substrate and the FR4 board are insufficient is solved, the lamp panel 2 of the embodiment adopts the flexible circuit soft board, so that after the lamp tube 1 is broken, the broken lamp tube 1 cannot be supported to keep a straight tube state, so as to inform a user that the LED straight tube lamp cannot be used, and avoid the occurrence of electric shock accidents. Therefore, when the flexible circuit soft board is adopted, the problem of electric shock caused by the broken glass tube can be relieved to a certain extent. The following embodiments are described with flexible circuit board as the lamp panel 2.
Referring to fig. 7, the flexible circuit board as the lamp panel 2 includes a circuit layer 2a with a conductive effect, and the light source 202 is disposed on the circuit layer 2a and electrically connected to a power source through the circuit layer 2 a. The circuit layer having a conductive effect in this specification may also be referred to as a conductive layer. Referring to fig. 7, in the embodiment, the flexible circuit board may further include a dielectric layer 2b stacked on the circuit layer 2a, the areas of the dielectric layer 2b and the circuit layer 2a are equal, and the surface of the circuit layer 2a opposite to the surface of the dielectric layer 2b is used for disposing the light source 202. The circuit layer 2a is electrically connected to a power source 5 for passing a dc current. The dielectric layer 2b is bonded to the inner circumferential surface of the lamp tube 1 via an adhesive sheet 4 on the surface opposite to the wiring layer 2 a. The wiring layer 2a may be a metal layer or a power layer with wires (e.g., copper wires) disposed thereon.
In other embodiments, the outer surfaces of the circuit layer 2a and the dielectric layer 2b may be covered with a circuit protection layer, which may be an ink material having functions of solder resistance and reflection increase. Or, the flexible circuit board may be a layer structure, that is, only one circuit layer 2a is formed, and then a circuit protection layer made of the above-mentioned ink material is coated on the surface of the circuit layer 2 a. Either a one-layer wiring layer 2a structure or a two-layer structure (a wiring layer 2a and a dielectric layer 2b) can be used with the circuit protection layer. The circuit protection layer may be disposed on one side of the flexible circuit board, for example, only one side having the light source 202. It should be noted that the flexible circuit board is a one-layer circuit layer structure 2a or a two-layer structure (a circuit layer 2a and a dielectric layer 2b), which is significantly more flexible and flexible than a common three-layer flexible substrate (a dielectric layer sandwiched between two circuit layers), and therefore, the flexible circuit board can be matched with a lamp tube 1 having a special shape (e.g., a non-straight tube lamp) to closely attach the flexible circuit board to the wall of the lamp tube 1. In addition, the flexible circuit soft board is closely attached to the tube wall of the lamp tube, so that the better the configuration is, the smaller the number of layers of the flexible circuit soft 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.
Certainly, the utility model discloses a flexible formula circuit soft board is not limited to one deck or two-layer circuit board only, and in other embodiments, flexible formula circuit soft board includes multilayer circuit layer 2a and multilayer dielectric layer 2b, and dielectric layer 2b can crisscross the superpose according to the preface with circuit layer 2a and locate circuit layer 2a and the one side that light source 202 carried on the back mutually, and light source 202 locates multilayer circuit layer 2 a's the top one deck, through circuit layer 2 a's the top one deck and power electrical connectivity. In other embodiments, the flexible circuit board as the lamp panel 2 has a length greater than that of the lamp tube.
Referring to fig. 23, in an embodiment, a flexible circuit board as a lamp panel 2 includes, in order from top to bottom, a first circuit layer 2a, a dielectric layer 2b and a second circuit layer 2c, the thickness of the second circuit layer 2c is greater than that of the first circuit layer 2a, the length of the lamp panel 2 is greater than that of the lamp tube 1, wherein the lamp panel 2 is not provided with a light source 202 and protrudes from an end region of the lamp tube 1, the first circuit layer 2a and the second circuit layer 2c are electrically connected through two through holes 203 and 204, but the through holes 203 and 204 are not connected to each other to avoid short circuit.
In this way, since the second circuit layer 2c has a larger thickness, the first circuit layer 2a and the dielectric layer 2b can be supported, and the lamp panel 2 is not easily deflected or deformed when attached to the inner wall of the lamp tube 1, thereby improving the manufacturing yield. In addition, first circuit layer 2a and second circuit layer 2c are electric to be linked together for circuit layout on first circuit layer 2a can extend to second circuit layer 2c, makes circuit layout on lamp plate 2 more many units. Moreover, the wiring of original circuit layout becomes the bilayer from the individual layer, and the circuit layer individual layer area on lamp plate 2, the ascending size in width direction promptly can further reduce, lets the batch carry out the lamp plate quantity of solid brilliant can increase, promotes productivity ratio.
Furthermore, the first circuit layer 2a and the second circuit layer 2c, which are not provided with the light source 202 and protrude from the end region of the lamp 1, on the lamp panel 2 can also be directly used to implement the circuit layout of the power module, so that the power module can be directly configured on the flexible circuit board.
Referring to fig. 2, the lamp panel 2 is provided with a plurality of light sources 202, the lamp head 3 is provided with a power supply 5 therein, and the light sources 202 and the power supply 5 are electrically connected through the lamp panel 2. In each embodiment of the present invention, the power supply 5 can be a single body (i.e. all power supply modules are integrated in one component), and is disposed in the lamp head 3 at one end of the lamp tube 1; alternatively, the power supply 5 may be divided into two parts, which are called dual bodies (i.e. all power supply modules are respectively disposed in two parts), and the two parts are respectively disposed in the lamp caps 3 at two ends of the lamp tube. If only one end of the lamp tube 1 is processed by the strengthening part, the power supply is preferably selected as a single body and is arranged in the lamp head 3 corresponding to the strengthened tail end region 101.
The power supply can be formed in multiple ways regardless of single or double bodies, for example, the power supply can be a module after encapsulation molding, specifically, a high-thermal-conductivity silica gel (the thermal conductivity coefficient is more than or equal to 0.7w/m · k) is used, and the power supply module is encapsulated and molded through a mold to obtain the power supply. Or, the power supply may be formed without potting adhesive, and the exposed power supply module is directly placed inside the lamp holder, or the exposed power supply module is wrapped by a conventional heat shrink tube and then placed inside the lamp holder 3. In other words, in the embodiments of the present invention, the power supply 5 may be in the form of a single printed circuit board carrying the power module as shown in fig. 7, or may be in the form of a single module as shown in fig. 21.
Referring to fig. 2 in combination with fig. 21, in an embodiment, one end of the power supply 5 has a male plug 51, the other end has a metal pin 52, the end of the lamp panel 2 has a female plug 201, and the lamp cap 3 has a hollow conductive pin 301 for connecting an external power supply. The male plug 51 of the power supply 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 holder 3. At this time, the male plug 51 and the female plug 201 are equivalent to an adapter and used for electrically connecting the power supply 5 and the lamp panel 2. After the metal pin 52 is inserted into the hollow conductive pin 301, the hollow conductive pin 301 is impacted by an external punching tool, so that the hollow conductive pin 301 is slightly deformed, the metal pin 52 on the power supply 5 is fixed, and the electrical connection is realized. When the lamp is powered on, the current passes through the hollow conductive pin 301, the metal pin 52, the male plug 51 and the female plug 201 in sequence to reach the lamp panel 2, and then reaches the light source 202 through the lamp panel 2. However, the structure of the power supply 5 is not limited to the modularized design shown in fig. 21. The power supply 5 may be a printed circuit board carrying a power module, and is electrically connected to the lamp panel 2 by the male plug 51 and the female plug 201.
In other embodiments, the electrical connection between the power source 5 and the lamp panel 2 may be any type of conventional wire bonding method instead of 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 to the power source and the other end of the metal wire to the lamp panel 2. Further, the metal wire can be covered with an insulating sleeve to protect the user from electric shock. However, the wire bonding method may have a problem of breakage during transportation, and the quality is slightly poor.
In other embodiments, the power source 5 and the lamp panel 2 may be directly connected by riveting, soldering, or wire bonding. In accordance with the fixing manner of the lamp panel 2, one side surface of the flexible circuit board is fixed to the inner circumferential surface of the lamp tube 1 by an adhesive sheet 4, and both ends of the flexible circuit board may be fixed to the inner circumferential surface of the lamp tube 1 or not.
If both ends of the flexible circuit board are fixed to the inner circumferential surface of the lamp tube 1, it is preferable to provide the female socket 201 on the flexible circuit board and then insert the male socket 51 of the power supply 5 into the female socket 201 to electrically connect.
If the lamp panel 2 is not fixed on the inner circumferential surface of the lamp tube 1 along the two axial ends of the lamp tube 1, if the lamp panel is connected by the wire, the wire may be broken because the two ends are free and the wire is easily shaken in the subsequent moving process. Therefore, the connection mode of the lamp panel 2 and the power supply 5 is preferably welding. Specifically, referring to fig. 6, the lamp panel 2 can be directly soldered to the output terminal of the power supply 5 after climbing over the transition area 103 of the reinforcement structure, so that the use of a wire is eliminated, and the stability of the product quality is improved. At this time, the lamp panel 2 does not need to be provided with the female plug 201, and the output end of the power supply 5 does not need to be provided with the male plug 51.
As shown in fig. 8, a specific implementation may be to leave a power supply pad a at the output end of the power supply 5, and leave tin on the power supply pad a, so that the thickness of tin on the pad is increased, which is convenient for welding, and correspondingly, leave a light source pad b on the end portion of the lamp panel 2, and weld the power supply pad a at the output end of the power supply 5 and the light source pad b of the lamp panel 2 together. If the plane on which the pads are located is defined as the front surface, the connection between the lamp panel 2 and the power supply 5 is most stable due to the abutting of the pads on the front surfaces, but when soldering, the soldering pressure head typically presses the back surface of the lamp panel 2, and the solder is heated through the lamp panel 2, which is more likely to cause a reliability problem. If a hole is formed in the middle of the light source pad b on the front surface of the lamp panel 2 and the light source pad b is overlaid on the power source pad a on the front surface of the power source 5 to be welded with the front surface facing upwards as shown in fig. 14, the welding pressure head can directly heat and melt the soldering tin, and the practical operation is easy to realize.
As shown in fig. 8, in the above embodiment, most of the flexible circuit board as the lamp panel 2 is fixed on the inner circumferential surface of the lamp 1, only two ends of the flexible circuit board are not fixed on the inner circumferential surface of the lamp 1, the lamp panel 2 not fixed on the inner circumferential surface of the lamp 1 forms a free portion 21, and the lamp panel 2 is fixed on the inner circumferential surface of the lamp 1. The free portion 21 has the pad b described above. During assembly, the free portion 21 is drawn toward the inside of the lamp tube 1 by the end of the free portion 21 welded to the power source 5. It should be noted that, when the flexible circuit board as the lamp panel 2 has a structure in which two circuit layers 2a and 2c sandwich a dielectric layer 2b as shown in fig. 23, the lamp panel 2 is not provided with the light source 202 and protrudes from the end region of the lamp tube 1 to serve as the free portion 21, so that the free portion 21 realizes the connection of the two circuit layers and the circuit layout of the power module.
In this embodiment, when the lamp panel 2 and the power supply 5 are connected, the pads b and a and the surface of the lamp panel where the light source 202 is located face in the same direction, and the through hole e shown in fig. 14 is formed in the pad b on the lamp panel 2, so that the pad b and the pad a are communicated with each other. When the free portion 21 of the lamp panel 2 contracts and deforms toward the inside of the lamp tube 1, the printed circuit board of the power supply 5 and the welding connection portion between the lamp panel 2 have a lateral pulling force on the power supply 5. Further, the soldering connection between the printed circuit board of the power supply 5 and the lamp panel 2 has a downward pull on the power supply 5, compared to the case where the pad a of the power supply 5 and the pad b of the lamp panel 2 face each other. This downward force is applied from the solder in the through hole e to form a more strengthened and firm electrical connection between the power source 5 and the lamp panel 2.
As shown in FIG. 9, the light source pads b of the lamp panel 2 are two unconnected pads, which are electrically connected to the positive and negative electrodes of the light source 202, respectively, and the size of the pad is about 3.5 × 2mm2The printed circuit board of the power supply 5 also has a corresponding pad, and tin is reserved above the pad for automatic soldering of a soldering machine, wherein the thickness of the tin can be 0.1 to 0.7mm, preferably 0.3 to 0.5mm, and most preferably 0.4 mm. An insulation hole c can be arranged between the two bonding pads, so that the two bonding pads are prevented from being electrically short-circuited due to welding of soldering tin in the welding process, and a positioning hole d can be arranged behind the insulation hole c and used for enabling an automatic welding machine to correctly judge the correct position of the light source bonding pad b.
At least one light source bonding pad b of the lamp panel is electrically connected with the anode and the cathode of the light source 202 respectively. In other embodiments, the number of the light source pads b may be more than one, such as 2, 3, 4 or more than 4, in order to achieve compatibility and expandability for subsequent use. When there are only 1 bonding pad, the two corresponding ends of the lamp panel are electrically connected with the power supply respectively to form a loop, and at the moment, an electronic component replacing mode, such as an inductor replacing a capacitor, is used as a current stabilizing component. In this specification, "inductance" is meant to encompass "inductor", "capacitance" is meant to encompass "capacitor", and "resistance" is meant to encompass "resistor". As shown in fig. 10 to 13, when the number of pads is 3, the 3 rd pad can be used as a ground, and when the number of pads is 4, the 4 th pad can be used as a signal input terminal. Accordingly, the number of the power source pads a is the same as that of the light source pads b. When the number of the bonding pads is more than 3, the bonding pads can be arranged in a row or in two rows, and the bonding pads are arranged at proper positions according to the size of the accommodating area in practical use as long as the bonding pads are not electrically connected with each other to cause short circuit. In other embodiments, if a part of the circuit is fabricated on the flexible circuit board, the number of the light source bonding pads b can be one, and the fewer the number of the bonding pads, the more the process is saved; the more the number of the bonding pads is, the more the electric connection fixation between the flexible circuit soft board and the power output end is enhanced.
As shown in fig. 14, in other embodiments, the inner portion of the light source pad b may have a structure of a solder through hole e, and the diameter of the solder through hole e may be 1 to 2mm, preferably 1.2 to 1.8mm, and most preferably 1.5mm, and if it is too small, the solder tin is not easy to pass through. When power supply 5's power pad a and the light source pad b of lamp plate 2 weld together, the tin of welding usefulness can pass welding perforation e, then pile up and cool off and condense above welding perforation e, form and have the solder ball structure g that is greater than welding perforation e diameter, this solder ball structure g can play like the function of nail, except that seeing through the tin between power supply pad a and the light source pad b fixed, can strengthen electric connection's firm the deciding because of solder ball structure g's effect even more.
As shown in fig. 15 to 16, in other embodiments, when the distance between the soldering through hole e of the light source pad b and the edge of the lamp panel 2 is less than or equal to 1mm, the soldering tin passes through the hole e and accumulates at the edge above the hole, the excessive tin also flows back downward from the edge of the lamp panel 2, and then condenses together with the tin on the power source pad a, which is configured like a rivet to firmly pin the lamp panel 2 on the circuit board of the power source 5, thereby having a reliable electrical connection function. As shown in fig. 17 and 18, in other embodiments, the solder gap f replaces the solder through hole e, the solder through hole of the pad is at the edge, the solder tin is used to electrically connect and fix the power pad a and the light source pad b through the solder gap f, the tin is easier to climb onto the light source pad b and accumulate around the solder gap f, after cooling and condensation, more tin forms a solder ball with a diameter larger than the solder gap f, and the solder ball structure enhances the fixing capability of the electrical connection structure. In this embodiment, the solder tin functions like a C-nail because of the design of the solder gap.
The structure of the present embodiment can be achieved by forming the bonding through-hole of the bonding pad first, or by directly punching the bonding through-hole with a bonding head or a thermal head during the bonding process. The surface of the welding pressure head contacted with the soldering tin can be a plane, a concave surface, a convex surface or the combination of the planes, the concave surfaces and the convex surfaces; the welding pressure head is used for limiting the surface of an object to be welded, such as the lamp panel 2, to be in a strip shape or a grid shape, the surface in contact with the soldering tin does not completely cover the through hole, the soldering tin can be ensured to penetrate out of the through hole, and when the soldering tin penetrates out of the welding through hole and is accumulated around the welding through hole, the concave part can provide a containing position for the soldering ball. In other embodiments, the flexible circuit board as the lamp panel 2 has a positioning hole, so that the power pad a and the light source pad b can be accurately positioned through the positioning hole during welding.
Referring to fig. 9, the printed circuit boards of the lamp panel 2 and the power supply 5 also have corresponding pads, and tin is reserved above the pads for facilitating automatic soldering of the soldering machine, generally speaking, the lamp panel 2 can be firmly soldered on the printed circuit board of the power supply 5 if the thickness of tin is preferably 0.3 to 0.5 mm.
Referring to fig. 19 and 20, in another embodiment, the lamp panel 2 and the power supply 5 fixed by soldering may be replaced by a circuit board assembly 25 mounted with a power supply module 250. 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 adhered 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 integrally forming a power source. The short circuit board 253 is made of a hard material and the longer circuit board 251 is made of a hard material, 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 circuit layer 2a shown in fig. 7. The circuit layer 2a of the lamp panel 2 and the power module 250 may be electrically connected in different manners according to actual use conditions. As shown in fig. 19, the power module 250 and the circuit layer 2a on the long circuit board 251, which is electrically connected to the power module 250, are both located 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. 20, the power module 250 and the circuit layer 2a on the long circuit board 251, which is electrically connected to the power module 250, are respectively located at two sides of the short circuit board 253, and the power module 250 penetrates through the short circuit board 253 and is electrically connected to the circuit layer 2a of the lamp panel 2.
As shown in fig. 19, in an embodiment, the circuit board assembly 25 omits the case that the lamp panel 2 and the power supply 5 are fixed by soldering in the foregoing embodiments, but first the long circuit board 251 and the short circuit board 253 are fixed by bonding, and then the power supply module 250 is electrically connected to the circuit layer 2a of the lamp panel 2. The lamp panel 2 is not limited to the one-layer or two-layer circuit board, and may further include another circuit layer 2c as shown in fig. 23. The light source 202 is provided on the wiring layer 2a, and is electrically connected to the power source 5 through the wiring layer 2 a. As shown in fig. 20, 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 can be a flexible circuit board or a flexible substrate of the lamp panel 2, the lamp panel 2 includes a 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 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 invention.
In the above embodiments, the length of the short circuit board 253 is about 15 mm to 40 mm, preferably 19 mm to 36 mm, and the length of the long circuit board 251 may be 800 mm to 2800 mm, preferably 1200 mm to 2400 mm. The ratio of short circuit board 253 to long circuit board 251 may be 1:20 to 1: 200.
In addition, in the above-mentioned embodiment, when the lamp panel 2 and the power supply 5 are fixed by welding, the end of the lamp panel 2 is not fixed on the inner circumferential surface of the lamp 1, and the power supply 5 cannot be safely and fixedly supported, and in other embodiments, if the power supply 5 needs to be separately fixed in the socket at the end region of the lamp 1, the socket is relatively long and the effective light emitting area of the lamp 1 is compressed.
Referring to fig. 22, in an embodiment, the lamp panel is an aluminum hard circuit board 22, and since the end portion of the lamp panel can be fixed to the end region of the lamp tube 1, and the power source 5 is fixed above the end portion of the hard circuit board 22 by welding in a manner perpendicular to the hard circuit board 22, the implementation of the welding process is facilitated, and the lamp head 3 does not need to have a space enough to bear the total length of the power source 5, so that the effective light emitting area of the lamp tube can be increased. In addition, in the above embodiment, in addition to the power module, a separate soldering metal wire is required to be installed on the power source 5 to electrically connect with the hollow conductive pin 301 of the lamp cap 3. In this embodiment, the conductive pin 53 can be directly used on the power supply 5 to electrically connect with the lamp cap 3, and no additional wires need to be soldered, which is more beneficial to the simplification of the manufacturing process.
The routing of the LED module in the lamp panel (e.g., including the flexible circuit board) may also change more than one wire to the second layer of circuit layer, so as to form a routing structure with two layers of circuit layers. It should be noted that the thickness of the second circuit layer of the flexible circuit board with two conductive layers or circuit layers is preferably thicker than that of the first circuit layer, so as to reduce the line loss (voltage drop) on the conductive lines in the second circuit layer. Moreover, compared with the flexible circuit board with a single conductive layer, the width of the flexible circuit board can be reduced by moving some wires to the second layer. On the same jig, the number of the narrower substrates to be discharged is greater than that of the wider substrates, so that the production efficiency of the LED module can be improved. Moreover, the flexible circuit board with two conductive layers is relatively easy to maintain its shape, so as to increase the reliability of production, for example: and the accuracy of the welding position during the welding of the LED assembly.
As the deformation of above-mentioned scheme, the utility model also provides a LED straight tube lamp, this LED straight tube lamp's the at least partial electronic component of power supply module sets up on the lamp plate: i.e. using PEC (printed electronic Circuits), techniques to print or embed at least part of the electronic components on the lamp panel.
In one embodiment of the present invention, the electronic components of the power supply module are all disposed on the lamp panel. The manufacturing process comprises the following steps: preparing a substrate (preparing a flexible printed circuit board) → spraying and printing metal nano ink → spraying and printing a passive component/an active device (a power supply component) → drying/sintering → spraying and printing an interlayer connection bump → spraying and printing insulating ink → spraying and printing metal nano ink → spraying and printing the passive component and the active device (the included multilayer board is formed by analogy in sequence) → spraying a surface soldering pad → spraying a solder resist to solder the LED component.
In the above-mentioned this embodiment, if when all set up the electronic component of power supply module on the lamp plate, only need pass through the pin of welding wire connection LED straight tube lamp at the both ends of lamp plate, realize the electrical connection of pin and lamp plate. Thus, no substrate is needed for the power supply assembly, and the design of the lamp cap can be further optimized. Preferably, the power supply assembly is arranged at both ends of the lamp panel, so that the influence of heat generated by the work of the power supply assembly on the LED assembly is reduced as much as possible. This embodiment improves the overall reliability of the power module by reducing welding.
If part electronic component prints on the lamp plate (such as resistance, electric capacity), and with big device like: electronic components such as an inductor, an electrolytic capacitor and the like are arranged in the lamp holder. The lamp panel is manufactured in the same way as above. Like this through with part electronic component, set up on the lamp plate, reasonable overall arrangement power supply module optimizes the design of lamp holder.
As a variation of the above, the electronic components of the power supply module may be embedded in the lamp panel. Namely: and embedding the electronic component on the flexible lamp panel in an embedding mode. Preferably, the method can be realized by adopting a method including a resistance type/capacitance type Copper Clad Laminate (CCL) or printing ink related to screen printing and the like; or the method of embedding the passive component is realized by adopting an ink-jet printing technology, namely, the ink-jet printer directly sprays and prints the conductive ink and the related functional ink which are taken as the passive component onto the set position in the lamp panel. As a variation of the above scheme, the passive component may also be an inkjet printer that directly prints the conductive ink and the related functional ink as the passive component onto the lamp panel). And then, carrying out UV light treatment or drying/sintering treatment to form the lamp panel embedded with the passive component. The electronic component embedded in the lamp panel comprises a resistor, a capacitor and an inductor; in other embodiments, active components are also suitable. The power supply components are rationally distributed by such a design to optimize the design of the lamp cap (this embodiment saves valuable printed circuit board surface space, reduces the size and weight and thickness of the printed circuit board due to the partial use of embedded resistors and capacitors; at the same time, the reliability of the power supply components is also improved due to the elimination of solder joints for these resistors and capacitors (which are the most prone to failure introduction on the printed circuit board).
Referring to fig. 19 and 20, the short circuit board 253 is divided into a first short circuit board and a second short circuit board connected to both ends of the long circuit board 251, and the electronic components of the power module are respectively mounted on the first short circuit board and the second short circuit board of the short circuit board 253. The length dimensions of the first short circuit board and the second short circuit board may be approximately the same or may not be the same. Generally, the length dimension of the first short circuit board (the right side circuit board of the short circuit board 253 of fig. 19 and the left side circuit board of the short circuit board 253 of fig. 20) is 30% to 80% of the length dimension of the second short circuit board. More preferably, the length of the first short circuit board is 1/3-2/3 of the length of the second short circuit board. In this embodiment, the length dimension of the first short circuit board is approximately half of the length dimension of the second short circuit board. The second short circuit board has a size of 15mm to 65mm (depending on the application). The first short circuit board is arranged in the lamp holder at one end of the LED straight tube lamp, and the second short circuit board is arranged in the lamp holder at the other opposite end of the LED straight tube lamp.
If an external driving power source is adopted to drive the LED straight lamp to emit light, the length of the lamp holder can be shortened. In order to ensure that the overall length of the LED lamp meets the specification, the shortened length of the lamp cap is complemented by the length of the lengthened lamp tube. Because the length of the lamp tube is prolonged, the length of the lamp panel attached in the lamp tube is correspondingly prolonged. Under the same illumination condition, the interval between the LED components of pasting on the lamp plate of fluorescent tube inner wall can corresponding increase, because the interval between the LED components increases, can improve the radiating efficiency like this, reduce the temperature when the LED component operates, and can prolong the life-span of LED component.
The circuit design and application of power supply assembly 250 is described next.
Please refer to fig. 24A, which is a schematic diagram of an application circuit block of a power module of a LED straight tube lamp according to a first preferred embodiment of the present invention. The AC power source 508 provides an AC power signal. The AC power source 508 may be a commercial power source with a voltage range of 100 and 277V and a frequency of 50 or 60 Hz. The lamp driving circuit 505 receives an ac power signal from the ac power source 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, and is used to convert the signal of the commercial power into a high-frequency and high-voltage ac driving signal. The types of common electronic ballasts include, for example: instant Start type (Instant Start) electronic ballast, preheating Start type (Program Start) electronic ballast, quick Start type (Rapid Start) electronic ballast etc. the utility model discloses a straight tube LED lamp all is suitable for. The voltage of the AC driving signal is greater than 300V, and the preferred voltage range is 400-700V; the frequency is greater than 10kHz, and the preferred frequency range is 20k-50 kHz. 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 the present embodiment, the LED straight lamp 500 is a single-ended power driving structure, and the lamp head at the same end of the lamp has a first pin 501, a second pin 502, a first pin 501, and a second pin 502 for receiving an external driving signal. The first pin 501 and the second pin 502 of the present embodiment are coupled (i.e., electrically connected, or directly or indirectly connected) to the lamp driving circuit 505 to receive an ac driving signal.
It is noted that the lamp driving circuit 505 is an omitted circuit and is indicated by a dashed line in the drawings. When the lamp driving circuit 505 is omitted, the ac power source 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 508 as the external driving signal.
In addition to the application of the single-ended power supply, the LED straight lamp 500 of the present invention can also be applied to a circuit structure with two ends and a single pin. Fig. 24B is a schematic diagram of an application circuit block of a power supply module of a LED straight tube lamp according to a second preferred embodiment of the present invention. Compared with the circuit shown in fig. 24A, the first pin 501 and the second pin 502 are respectively disposed on the two-end lamp caps of the LED straight lamp 500 opposite to the lamp tube to form two single pins, and the rest of the circuit connections and functions are the same as those of the circuit shown in fig. 24A.
Next, please refer to fig. 24C, which is a schematic circuit block diagram of an LED lamp according to a first preferred embodiment of the present invention. The power supply assembly of the LED lamp mainly includes a first rectifying circuit 510, a filter 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 output the rectified signal through the first rectifying output terminal 511 and the second rectifying output terminal 512. The external driving signal here can be the ac driving signal or the ac power signal in fig. 24A and 24B, and can even be a dc signal without affecting the operation of the LED lamp. The filter circuit 520 is coupled to the first rectifying circuit for filtering the rectified signal; the filter circuit 520 is coupled to the first rectification output terminal 511 and the second rectification output terminal 512 to receive the rectified signal, filter the rectified signal, and output the filtered signal through the first filtered output terminal 521 and the second filtered output terminal 522. The LED driving module 530 is coupled to the filter circuit 520 to receive the filtered signal and emit light; the LED driving module 530 is coupled to the first filtered output end 521 and the second filtered output end 522 to receive the filtered signal, and then drives an LED element (not shown) in the LED driving module 530 to emit light. This section is described in detail in the examples which follow.
It should be noted that in the present embodiment, the number of the first rectification output terminal 511, the second rectification output terminal 512, the first filtered output terminal 521, and the second filtered output terminal 522 are two, and in practical applications, the number of the first rectification output terminal, the second rectification output terminal, the first filtered output terminal 512, and the second filtered output terminal is increased or decreased according to the signal transmission requirement among the first rectification circuit 510, the filtering circuit 520, and the LED driving module 530, that is, the number of the coupling terminals among the circuits may be one or more.
In addition, the power supply module for LED lamp shown in fig. 24C and the following embodiments of the power supply module for LED lamp are applied to the LED straight tube lamp shown in fig. 24A and 24B, and for the light emitting circuit configuration including two pins for transmitting power, for example: the bulb lamp, the PAL lamp, the cannula energy-saving lamp (PLS lamp, PLD lamp, PLT lamp, PLL lamp, etc.) and other different lighting lamps are suitable for the specification of the lamp holder.
Please refer to fig. 24D, which is a schematic diagram of an application circuit block of a power module of a LED straight tube lamp according to a third preferred embodiment of the present invention. The AC power source 508 provides an AC power signal. The lamp driving circuit 505 receives an ac power signal from the ac power source 508 and converts the ac power signal into an ac driving signal. The LED straight lamp 500 receives the ac driving signal from the lamp driving circuit 505 and is driven to emit light. In the present embodiment, the LED straight lamp 500 is a dual-end (each dual-pin) power supply, and one end of the lamp has a first pin 501 and a second pin 502, and the other end has a third pin 503 and a fourth pin 504. The first pin 501, the second pin 502, the third pin 503 and the fourth pin 504 are coupled to the tube driving circuit 505 to commonly receive an ac driving signal, so as to drive an LED element (not shown) in the LED straight tube lamp 500 to emit light. Ac power source 508 may be mains power, and lamp driving circuit 505 may be a ballast or an electronic ballast.
Fig. 24E is a schematic circuit block diagram of an LED lamp according to a second preferred embodiment of the present invention. The power supply assembly of the LED 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 for receiving and rectifying the external driving signal transmitted by the third pin 503 and the fourth pin 504. That is, the power supply component of the LED lamp may include the first rectifying circuit 510 and the second rectifying circuit 540, which output the rectified signal at the first rectifying output terminal 511 and the second rectifying output terminal 512. The filter circuit 520 is coupled to the first rectification output terminal 511 and the second rectification output terminal 512 to receive the rectified signal, filter the rectified signal, and output the filtered signal through the first filtered output terminal 521 and the second filtered output terminal 522. The LED driving module 530 is coupled to the first filtered output end 521 and the second filtered output end 522 to receive the filtered signal, and then drives an LED element (not shown) in the LED driving module 530 to emit light.
The power supply assembly of the LED lamp of the present embodiment can be applied to the double-ended power supply architecture of fig. 24D. It should be noted that, since the power supply assembly of the LED lamp of the present embodiment has both the first rectifying circuit 510 and the second rectifying circuit 540, it can also be applied to the single-ended power supply architecture of fig. 24A, B to receive external driving signals (including the ac power signal, the ac driving signal, etc. in the foregoing embodiments). Of course, besides the present embodiment, the power supply components of the LED lamps of the other embodiments can also be applied to the driving structure of the dc signal.
Please refer to fig. 25A, which is a block diagram illustrating an application circuit of a power supply module of an LED lamp according to a fourth preferred embodiment of the present invention. Compared with fig. 24E, the power supply assembly of the LED lamp of the present embodiment includes the first rectifying circuit 510 and the second rectifying circuit 540, the filter circuit 520, and the LED driving module 530 further includes the driving circuit 1530 and the LED module 630. The driving circuit 1530 is a dc-to-dc conversion circuit, coupled to the first filtering output terminal 521 and the second filtering output terminal 522, for receiving the filtered signal, and performing power conversion to convert the filtered signal into a driving signal, which is output from the first driving output terminal 1521 and the second driving output terminal 1522. The LED module 630 is coupled to the first driving output end 1521 and the second driving output end 1522 for receiving the driving signal to emit light, preferably, the current of the LED module 630 is stabilized at a set current value.
It is noted that the second rectifying circuit 540 is an unnecessary component and may be omitted, and is shown by a dotted line in the figure. That is, the LED driving module 530 in the embodiment shown in fig. 24A and 24C may further include a driving circuit 1530 and an LED module 630 as in the embodiment of fig. 24E. Therefore, the power supply assembly of the LED lamp of the present embodiment can also be applied to the application environment of single-ended power supply and double-ended power supply, for example: the bulb lamp, the PAL lamp and the like are all suitable.
Fig. 25B is a schematic circuit diagram of a driving circuit according to a first preferred embodiment of the present invention. In this embodiment, the driving circuit 1630 is a step-down dc-dc conversion circuit, and includes a controller 1631 and a conversion circuit, where the conversion circuit includes an inductor 1632, a freewheeling diode 1633, a capacitor 1634 and a switch 1635. The driving circuit 1630 is coupled to the first filtering output terminal 521 and the second filtering output terminal 522 to convert the received filtered signal into a driving signal for driving the LED module coupled between the first driving output terminal 1521 and the second driving output terminal 1522.
In the present embodiment, the switch 1635 is a mosfet having a control terminal, a first terminal and a second terminal. The switch 1635 has a first terminal coupled to the anode of the freewheeling diode 1633, a second terminal coupled to the second filtering output terminal 522, and a control terminal coupled to the controller 1631 for controlling the first terminal and the second terminal to be turned on or off. The first driving output terminal 1521 is coupled to the first filtering output terminal 521, the second driving output terminal 1522 is coupled to one end of the inductor 1632, and the other end of the inductor 1632 is coupled to the first end of the switch 1635. The capacitor 1634 is coupled between the first driving output end 1521 and the second driving output end 1522 to stabilize a voltage difference between the first driving output end 1521 and the second driving output end 1522. The negative terminal of the freewheeling diode 1633 is coupled to the first driving output terminal 1521.
The operation of the driving circuit 1630 is described next.
The controller 1631 determines the on/off time of the switch 1635 according to the current detection signal S535 and/or S531, that is, controls the Duty Cycle (Duty Cycle) of the switch 1635 to adjust the magnitude of the driving signal. The current detection signal S535 represents the magnitude of the current flowing through the switch 1635. The current detection signal S535 represents the magnitude of the current flowing through the LED module coupled between the first driving output end 1521 and the second driving output end 1522. According to one of the current detection signals S531 and S535, the controller 1631 can obtain information about the magnitude of the power converted by the conversion circuit. When the switch 1635 is turned on, the current of the filtered signal flows from the first filtering output terminal 521, and flows out from the second filtering output terminal 522 through the capacitor 1634 and the first driving output terminal 1521 to the LED module, the inductor 1632 and the switch 1635. At this time, the capacitor 1634 and the inductor 1632 store energy. When the switch 1635 is turned off, the inductor 1632 and the capacitor 1634 release the stored energy, and the current flows to the first driving output end 1521 through the freewheeling diode 1633, so that the LED module still emits light continuously.
It is noted that the capacitor 1634 is not an essential component and may be omitted, and is shown in dashed lines. In some applications, the inductor can be used to stabilize the LED module current by resisting the change of the current, and the capacitor 1634 can be omitted.
Fig. 25C is a schematic circuit diagram of a driving circuit according to a second preferred embodiment of the present invention. In the present embodiment, the driving circuit 1730 is a boost dc-to-dc conversion circuit, which includes a controller 1731 and a conversion circuit, and the conversion circuit includes an inductor 1732, a freewheeling diode 1733, a capacitor 1734 and a switch 1735. The driving circuit 1730 converts the filtered signals received by the first filtering output terminal 521 and the second filtering output terminal 522 into driving signals to drive the LED module coupled between the first driving output terminal 1521 and the second driving output terminal 1522.
One end of the inductor 1732 is coupled to the first filter output terminal 521, and the other end is coupled to an anode of the current filtering diode 1733 and a first end of the switch 1735. A second terminal of the switch 1735 is coupled to the second filter output 522 and the second driving output 1522. The cathode of the freewheeling diode 1733 is coupled to the first driving output terminal 1521. The capacitor 1734 is coupled between the first driving output end 1521 and the second driving output end 1522.
The controller 1731 is coupled to the control terminal of the switch 1735, and controls the switch 1735 to turn on or off according to the current detection signal S531 and/or the current detection signal S535. When the switch 1735 is turned on, current flows from the first filter output terminal 521, flows through the inductor 1732 and the switch 1735, and then flows out from the second filter output terminal 522. At this time, the current flowing through the inductor 1732 increases with time, and the inductor 1732 is in an energy storage state. Meanwhile, the capacitor 1734 is in a power-off state to continuously drive the LED module to emit light. When the switch 1735 is turned off, the inductor 1732 is in a de-energized state, and the current of the inductor 1732 decreases with time. The current from the inductor 1732 freewheels through the freewheeling diode 1733 to the capacitor 1734 and the LED module. At this time, the capacitor 1734 is in a stored energy state.
It is noted that the capacitor 1734 is an omissible component, shown in dashed lines. When the capacitor 1734 is omitted, when the switch 1735 is turned on, the current of the inductor 1732 does not flow through the LED module, so that the LED module does not emit light; when the switch 1735 is turned off, the current of the inductor 1732 flows through the LED module via the freewheeling diode 1733, so that the LED module emits light. By controlling the light emitting time of the LED module and the magnitude of the current flowing through the LED module, the average brightness of the LED module can be stabilized on a set value, and the same stable light emitting effect can be achieved.
Fig. 25D is a schematic circuit diagram of a driving circuit according to a third preferred embodiment of the present invention. In this embodiment, the driving circuit 1830 is a step-down dc-dc conversion circuit, and includes a controller 1831 and a conversion circuit, and the conversion circuit includes an inductor 1832, a freewheeling diode 1833, a capacitor 1834, and a switch 1835. The driving circuit 1830 is coupled to the first filtering output terminal 521 and the second filtering output terminal 522 for converting the received filtered signal into a driving signal to drive the LED module coupled between the first driving output terminal 1521 and the second driving output terminal 1522.
The switch 1835 has a first terminal coupled to the first filter output terminal 521, a second terminal coupled to the negative terminal of the freewheeling diode 1833, and a control terminal coupled to the controller 1831 for receiving a control signal from the controller 1831 to enable the first terminal and the second terminal to be turned on or off. The anode of freewheeling diode 1833 is coupled to second filtered output 522. The inductor 1832 has one end coupled to the second end of the switch 1835 and the other end coupled to the first driving output terminal 1521. The second driving output 1522 is coupled to the anode of the freewheeling diode 1833. The capacitor 1834 is coupled between the first driving output end 1521 and the second driving output end 1522 for stabilizing a voltage between the first driving output end 1521 and the second driving output end 1522.
The controller 1831 controls the switch 1835 to turn on or off according to the current detection signal S531 and/or the current detection signal S535. When the switch 1835 is turned on, current flows from the first filter output terminal 521, and flows through the switch 1835, the inductor 1832, the first driving output terminal 1521 and the second driving output terminal 1522, and then flows out from the second filter output terminal 522. At this time, the current flowing through the inductor 1832 and the voltage of the capacitor 1834 increase with time, and the inductor 1832 and the capacitor 1834 are in the energy storage state. When the switch 1835 is turned off, the inductor 1832 is in a de-energized state and the current of the inductor 1832 decreases over time. At this time, the current of the inductor 1832 flows through the first and second driving output terminals 1521 and 1522 and the freewheeling diode 1833 and then returns to the inductor 1832 to form a freewheeling.
It is noted that the capacitor 1834 is an omitted component, and is shown in dashed lines. When the capacitor 1834 is omitted, no matter the switch 1835 is turned on or off, the current of the inductor 1832 can flow through the first driving output end 1521 and the second driving output end 1522 to drive the LED module to emit light continuously.
Fig. 25E is a schematic circuit diagram of a driving circuit according to a fourth preferred embodiment of the present invention. In this embodiment, the driving circuit 1930 is a step-down dc-to-dc conversion circuit, and includes a controller 1931 and a conversion circuit, and the conversion circuit includes an inductor 1932, a freewheeling diode 1933, a capacitor 1934, and a switch 1935. The driving circuit 1930 is coupled to the first filtering output end 521 and the second filtering output end 522 to convert the received filtered signal into a driving signal for driving the LED module coupled between the first driving output end 1521 and the second driving output end 1522.
One end of the inductor 1932 is coupled to the first filtering output terminal 521 and the second driving output terminal 1522, and the other end is coupled to the first end of the switch 1935. The second terminal of the switch 1935 is coupled to the second filtering output 522, and the control terminal is coupled to the controller 1931 to be turned on or off according to a control signal of the controller 1931. The freewheeling diode 1933 has an anode coupled to a connection point between the inductor 1932 and the switch 1935 and a cathode coupled to the first driving output 1521. The capacitor 1934 is coupled to the first driving output end 1521 and the second driving output end 1522 to stabilize the driving of the LED module coupled between the first driving output end 1521 and the second driving output end 1522.
The controller 1931 controls the on/off of the switch 1935 according to the current detection signal S531 and/or the current detection signal S535. When the switch 1935 is turned on, current flows in from the first filtering output terminal 521, and flows out from the second filtering output terminal 522 after flowing through the inductor 1932 and the switch 1935. At this time, the current flowing through the inductor 1932 increases with time, and the inductor 1932 is in an energy storage state; the voltage of the capacitor 1934 decreases with time, and the capacitor 1934 is in a de-energized state to maintain the LED module illuminated. When the switch 1935 is turned off, the inductor 1932 is in a de-energized state and the current of the inductor 1932 decreases over time. At this time, the current of the inductor 1932 flows through the freewheeling diode 1933, the first driving output end 1521 and the second driving output end 1522 and then returns to the inductor 1932 to form freewheeling. At this time, the capacitor 1934 is in an energy storage state, and the voltage of the capacitor 1934 increases with time.
It is noted that the capacitor 1934 is an omitted component, and is shown in dashed lines. When the capacitor 1934 is omitted and the switch 1935 is turned on, the current of the inductor 1932 does not flow through the first driving output end 1521 and the second driving output end 1522, so that the LED module does not emit light. When the switch 1935 is turned off, the current of the inductor 1932 flows through the LED module via the freewheeling diode 1933, and the LED module emits light. By controlling the light emitting time of the LED module and the magnitude of the current flowing through the LED module, the average brightness of the LED module can be stabilized on a set value, and the same stable light emitting effect can be achieved.
Fig. 26A is a schematic diagram of an application circuit block of a power supply module of an LED lamp according to a fifth preferred embodiment of the present invention. Compared to the embodiment shown in fig. 25A, the present embodiment includes the first and second rectifying circuits 510 and 540, the filter circuit 520, the LED driving module 530 including the driving circuit 1530 and the LED driving module 630, and further includes the mode switching circuit 580. The mode switching circuit 580 is coupled to at least one of the first filter output terminal 521 and the second filter output terminal 522 and at least one of the first driving output terminal 1521 and the second driving output terminal 1522 for determining whether to perform the first driving mode or the second driving mode. The first driving mode inputs the filtered signal to the driving circuit 1530, and the second driving mode bypasses at least a part of the components of the driving circuit 1530, so that the driving circuit 1530 stops operating and directly inputs the filtered signal to drive the LED module 630. Some components of the bypassed driving circuit 1530 include an inductor or a changeover switch, and the driving circuit 1530 is disabled from power conversion and stops operating. Certainly, if the capacitor of the driving circuit 1530 exists but is not omitted, the capacitor can still be used for filtering the ripple of the filtered signal to achieve the effect of stabilizing the voltage at the two ends of the LED module. When the mode switching circuit 580 determines the first driving mode and inputs the filtered signal into the driving circuit 1530, the driving circuit 1530 converts the filtered signal into a driving signal to drive the LED module 630 to emit light. When the mode switching circuit 580 determines the second driving mode and directly outputs the filtered signal to the LED module 630 to bypass the driving circuit 1530, the equivalent upper filtering circuit 520 is a driving circuit of the LED module 630, and the filtering circuit 520 provides the filtered signal as a driving signal of the LED module to drive the LED module to emit light.
It should be noted that the mode switching circuit 580 may determine the first driving mode or the second driving mode according to a user command or a determination of signals received by the LED lamp through the first pin 501, the second pin 502, the third pin 503 and the fourth pin 504. By means of the mode switching circuit, the power supply assembly of the LED lamp can be adjusted to a proper driving mode corresponding to different application environments or driving systems, and therefore compatibility of the LED lamp is improved. The second rectifying circuit 540 is an omitted circuit, and is indicated by a dotted line.
Fig. 26B is a schematic circuit diagram of a mode switching circuit according to a first preferred embodiment of the present invention. The mode switching circuit 680 includes a mode switching switch 681, and is applied to the driver circuit 1630 shown in fig. 25B. Referring to fig. 26B and fig. 25B, the mode switch 681 has three terminals 683, 684, 685, where the terminal 683 is coupled to the second driving output terminal 1522, the terminal 684 is coupled to the second filtering output terminal 522, and the terminal 685 is coupled to the inductor 1632 of the driving circuit 1630.
When the mode switch circuit 680 determines the first mode, the mode switch 681 turns on the first current path at the terminals 683 and 685 and turns off the second current path at the terminals 683 and 684. At this time, the second driving output terminal 1522 is coupled to the inductor 1632. Therefore, the driving circuit 1630 operates normally, and receives the filtered signal from the first filtering output terminal 521 and the second filtering output terminal 522 and converts the filtered signal into a driving signal to drive the LED module through the first driving output terminal 1521 and the second driving output terminal 1522.
When the mode switch circuit 680 determines the second mode, the mode switch 681 turns on the second current path at the terminals 683 and 684 and turns off the first current path at the terminals 683 and 685. At this time, the second filter output 522 is coupled to the second driving output 1522. Therefore, the driving circuit 1630 stops operating. The filtered signal is inputted from the first and second filter output terminals 521 and 522 and directly outputted from the first and second driving output terminals 1521 and 1522 to drive the LED module, bypassing the inductor 1632 and the switch 1635 of the driving circuit 1630.
Fig. 26C is a schematic circuit diagram of a mode switching circuit according to a second preferred embodiment of the present invention. The mode switching circuit 780 includes a mode switching switch 781 and is applied to the driver circuit 1630 shown in fig. 25B. Referring to fig. 26C and fig. 25B, the mode switch 781 has three terminals 783, 784 and 785, the terminal 783 is coupled to the second filter output terminal 522, the terminal 784 is coupled to the second driving output terminal 1522, and the terminal 785 is coupled to the switch 1635 of the driving circuit 1630.
When the mode switch 780 determines the first mode, the mode switch 781 turns on the first current paths of the terminals 783 and 785 and turns off the second current paths of the terminals 783 and 784. At this time, the second filtering output 522 is coupled to the switch 1635. Therefore, the driving circuit 1630 operates normally, and receives the filtered signal from the first filtering output terminal 521 and the second filtering output terminal 522 and converts the filtered signal into a driving signal to drive the LED module through the first driving output terminal 1521 and the second driving output terminal 1522.
When the mode switch 780 determines the second mode, the mode switch 781 turns on the second current paths of the terminals 783 and 784 and turns off the first current paths of the terminals 783 and 785. At this time, the second filter output 522 is coupled to the second driving output 1522. Therefore, the driving circuit 1630 stops operating. The filtered signal is inputted from the first and second filter output terminals 521 and 522 and directly outputted from the first and second driving output terminals 1521 and 1522 to drive the LED module, bypassing the inductor 1632 and the switch 1635 of the driving circuit 1630.
Fig. 26D is a schematic circuit diagram of a mode switching circuit according to a third preferred embodiment of the present invention. The mode switching circuit 880 includes a mode switch 881, which is suitable for the driving circuit 1730 shown in fig. 25C. Referring to fig. 26D and fig. 25C, the mode switch 881 has three terminals 883, 884 and 885, the terminal 883 is coupled to the first filter output terminal 521, the terminal 884 is coupled to the first driving output terminal 1521, and the terminal 885 is coupled to the inductor 1732 of the driving circuit 1730.
When the mode switching circuit 880 determines the first mode, the mode switching switch 881 turns on the first current path at the terminals 883 and 885 and turns off the second current path at the terminals 883 and 884. At this time, the first filter output terminal 521 is coupled to the inductor 1732. Therefore, the driving circuit 1730 operates normally, and receives the filtered signals from the first filtering output terminal 521 and the second filtering output terminal 522 and converts the filtered signals into driving signals to drive the LED module through the first driving output terminal 1521 and the second driving output terminal 1522.
When the mode switching circuit 880 determines the second mode, the mode switching switch 881 turns on the second current path at the terminals 883 and 884 and turns off the first current path at the terminals 883 and 885. At this time, the first filter output 521 is coupled to the first driving output 1521. Therefore, the driving circuit 1730 stops operating. The filtered signal is inputted from the first and second filter output terminals 521 and 522 and directly outputted from the first and second driving output terminals 1521 and 1522 to drive the LED module, bypassing the inductor 1732 and the freewheeling diode 1733 of the driving circuit 1730.
Fig. 26E is a schematic circuit diagram of a mode switching circuit according to a fourth preferred embodiment of the present invention. The mode switching circuit 980 includes a mode switch 981, which is applied to the driving circuit 1730 shown in fig. 25C. Referring to fig. 26E and fig. 25C, the mode switch 981 has three terminals 983, 984, and 985, the terminal 983 is coupled to the first driving output terminal 1521, the terminal 984 is coupled to the first filtering output terminal 521, and the terminal 985 is coupled to the cathode of the freewheeling diode 1733 of the driving circuit 1730.
When the mode switching circuit 980 determines the first mode, the mode switch 981 turns on the first current path at the terminals 983 and 985 and turns off the second current path at the terminals 983 and 984. At this time, the cathode of the freewheeling diode 1733 is coupled to the first filter output 521. Therefore, the driving circuit 1730 operates normally, and receives the filtered signals from the first filtering output terminal 521 and the second filtering output terminal 522 and converts the filtered signals into driving signals to drive the LED module through the first driving output terminal 1521 and the second driving output terminal 1522.
When the mode switching circuit 980 determines the second mode, the mode switch 981 turns on the second current path at the terminals 983 and 984 and turns off the first current path at the terminals 983 and 985. At this time, the first filter output 521 is coupled to the first driving output 1521. Therefore, the driving circuit 1730 stops operating. The filtered signal is inputted from the first and second filter output terminals 521 and 522 and directly outputted from the first and second driving output terminals 1521 and 1522 to drive the LED module, bypassing the inductor 1732 and the freewheeling diode 1733 of the driving circuit 1730.
Fig. 26F is a schematic circuit diagram of a mode switching circuit according to a fifth preferred embodiment of the present invention. The mode switching circuit 1680 includes a mode switching switch 1681 applied to the driving circuit 1830 shown in fig. 25D. Referring to fig. 26F and fig. 25D, the mode switch 1681 has three terminals 1683, 1684, 1685, the terminal 1683 is coupled to the first filter output terminal 521, the terminal 1684 is coupled to the first driving output terminal 1521, and the terminal 1685 is coupled to the switch 1835 of the driving circuit 1830.
When the mode switching circuit 1680 determines the first mode, the mode switching switch 1681 turns on the first current path of the terminals 1683 and 1685 and turns off the second current path of the terminals 1683 and 1684. At this time, the first filter output 521 is coupled to the switch 1835. Therefore, the driving circuit 1830 operates normally, receives the filtered signal from the first filtering output terminal 521 and the second filtering output terminal 522, converts the filtered signal into a driving signal, and drives the LED module through the first driving output terminal 1521 and the second driving output terminal 1522.
When the mode switching circuit 1680 determines the second mode, the mode switching switch 1681 turns on the second current path of the terminals 1683 and 1684 and turns off the first current path of the terminals 1683 and 1685. At this time, the first filter output 521 is coupled to the first driving output 1521. Therefore, the driving circuit 1830 stops operating. The filtered signal is inputted from the first and second filter output terminals 521 and 522 and directly outputted from the first and second driving output terminals 1521 and 1522 to drive the LED module, bypassing the inductor 1832 and the switch 1835 of the driving circuit 1830.
Fig. 26G is a schematic circuit diagram of a mode switching circuit according to a sixth preferred embodiment of the present invention. The mode switching circuit 1780 includes a mode switching switch 1781 and is applied to the driving circuit 1830 shown in fig. 25D. Referring to fig. 26G and fig. 25D, the mode switch 1781 has three terminals 1783, 1784 and 1785, the terminal 1783 is coupled to the first filter output terminal 521, the terminal 1784 is coupled to the first driving output terminal 1521, and the terminal 1785 is coupled to the inductor 1832 of the driving circuit 1830.
When the mode switching circuit 1780 determines the first mode, the mode switching switch 1781 turns on the first current path at the terminals 1783 and 1785 and turns off the second current path at the terminals 1783 and 1784. At this time, the first filter output 521 is coupled to the inductor 1832. Therefore, the driving circuit 1830 operates normally, receives the filtered signal from the first filtering output terminal 521 and the second filtering output terminal 522, converts the filtered signal into a driving signal, and drives the LED module through the first driving output terminal 1521 and the second driving output terminal 1522.
When the mode switching circuit 1780 determines the second mode, the mode switching switch 1781 turns on the second current path at the terminals 1783 and 1784 and turns off the first current path at the terminals 1783 and 1785. At this time, the first filter output 521 is coupled to the first driving output 1521. Therefore, the driving circuit 1830 stops operating. The filtered signal is inputted from the first and second filter output terminals 521 and 522 and directly outputted from the first and second driving output terminals 1521 and 1522 to drive the LED module, bypassing the inductor 1832 and the switch 1835 of the driving circuit 1830.
Fig. 26H is a schematic circuit diagram of a mode switching circuit according to a seventh preferred embodiment of the present invention. The mode switching circuit 1880 includes mode switching switches 1881 and 1882, and is applied to the driver circuit 1930 shown in fig. 25E. Referring to fig. 26H and fig. 25E, the mode switch 1881 has three terminals 1883, 1884, and 1885, the terminal 1883 is coupled to the first driving output terminal 1521, the terminal 1884 is coupled to the first filtering output terminal 521, and the terminal 1885 is coupled to the freewheeling diode 1933 of the driving circuit 1930. The mode switch 1882 has three terminals 1886, 1887, 1888, the terminal 1886 being coupled to the second driving output 1522, the terminal 1887 being coupled to the second filtering output 522 and the terminal 1888 being coupled to the first filtering output 521.
When mode switching circuit 1880 determines the first mode, mode switch 1881 turns on the first current paths at terminals 1883 and 1885 and turns off the second current paths at terminals 1883 and 1884, and mode switch 1882 turns on the third current paths at terminals 1886 and 1888 and turns off the fourth current paths at terminals 1886 and 1887. At this time, the first driving output 1521 is coupled to the freewheeling diode 1933, and the first filtering output 521 is coupled to the second driving output 1522. Therefore, the driving circuit 1930 operates normally, and receives the filtered signal from the first filtering output terminal 521 and the second filtering output terminal 522, and converts the filtered signal into a driving signal to drive the LED module through the first driving output terminal 1521 and the second driving output terminal 1522.
When mode switching circuit 1880 determines the second mode, mode switch 1881 turns on the second current paths of terminals 1883 and 1884 and turns off the first current paths of terminals 1883 and 1885, and mode switch 1882 turns on the fourth current paths of terminals 1886 and 1887 and turns off the third current paths of terminals 1886 and 1888. At this time, the first filter output 521 is coupled to the first driving output 1521, and the second filter output 522 is coupled to the second driving output 1522. Therefore, the driving circuit 1930 stops operating. The filtered signal is input from the first and second filter outputs 521 and 522 and directly driven by the first and second driving outputs 1521 and 1522 to the LED module, bypassing the freewheeling diode 1933 and the switch 1935 of the driving circuit 1930.
Fig. 26I is a schematic circuit diagram of a mode switching circuit according to an eighth preferred embodiment of the present invention. The mode switching circuit 1980 includes mode switching switches 1981 and 1982, and is applied to the driver circuit 1930 shown in fig. 25E. Referring to fig. 26I and fig. 25E, the mode switch 1981 has three terminals 1983, 1984, 1985, the terminal 1983 is coupled to the second filter output 522, the terminal 1984 is coupled to the second driving output 1522, and the terminal 1985 is coupled to the switch 1935 of the driving circuit 1930. The mode switch 1982 has three terminals 1986, 1987, 1988, the terminal 1986 being coupled to the first filter output terminal 521, the terminal 1987 being coupled to the first driving output terminal 1521, and the terminal 1988 being coupled to the second driving output terminal 1522.
When the mode switch circuit 1980 determines the first mode, the mode switch 1981 turns on the first current path at the terminals 1983 and 1985 and turns off the second current path at the terminals 1983 and 1984, and the mode switch 1982 turns on the third current path at the terminals 1986 and 1988 and turns off the fourth current path at the terminals 1986 and 1987. At this time, the second filter output 522 is coupled to the switch 1935, and the first filter output 521 is coupled to the second driving output 1522. Therefore, the driving circuit 1930 operates normally, and receives the filtered signal from the first filtering output terminal 521 and the second filtering output terminal 522, and converts the filtered signal into a driving signal to drive the LED module through the first driving output terminal 1521 and the second driving output terminal 1522.
When the mode switch circuit 1980 determines the second mode, the mode switch 1981 turns on the second current path at the terminals 1983 and 1984 and turns off the first current path at the terminals 1983 and 1985, and the mode switch 1982 turns on the fourth current path at the terminals 1986 and 1987 and turns off the third current path at the terminals 1986 and 1988. At this time, the first filter output 521 is coupled to the first driving output 1521, and the second filter output 522 is coupled to the second driving output 1522. Therefore, the driving circuit 1930 stops operating. The filtered signal is input from the first and second filter outputs 521 and 522 and directly driven by the first and second driving outputs 1521 and 1522 to the LED module, bypassing the freewheeling diode 1933 and the switch 1935 of the driving circuit 1930.
It is noted that the mode switch in the above embodiments may be a single-pole double-throw switch or two semiconductor switches (e.g., mosfets) for switching one of the two current paths on and the other off. The current path is used to provide a conduction path for the filtered signal, so that the current of the filtered signal flows through one of the conduction paths to achieve the function of mode selection. For example, referring to fig. 24A, fig. 24B and fig. 24D, when the tube driving circuit 505 does not exist and the ac power source 508 directly supplies power to the LED straight tube lamp 500, the mode switching circuit may determine the first mode, and the driving circuit converts the filtered signal into the driving signal, so that the level of the driving signal may match the level required by the LED module to correctly drive the LED module to emit light. When the lamp driving circuit 505 exists, the mode switching circuit can determine the second mode, and the filtered signal directly drives the LED module to emit light; or the first mode can be determined, and the driving circuit converts the filtered signal into a driving signal to drive the LED module to emit light.
The utility model discloses LED straight tube lamp is in the realization of each embodiment with as before. It should be noted that, in each embodiment, for the same LED straight lamp, in the features of "flexible circuit board is used as the lamp panel", and "assembly of long and short circuit boards is used as the power supply", one or more technical features may be included.
In addition, the content of the flexible circuit board as the lamp panel may be selected from one or a combination of related technical features in the embodiments.
For example, in the case that the lamp panel is a flexible circuit flexible board, the flexible circuit flexible board is connected to the output terminal of the power supply by wire bonding or the flexible circuit flexible board is welded to the output terminal of the power supply. In addition, the flexible circuit soft board comprises a dielectric layer and a circuit layer which are stacked; the flexible circuit soft board can be coated with a circuit protection layer made of an ink material on the surface, and the function of the reflecting film is realized by increasing the width along the circumferential direction.
For example, in the power supply design, the assembly of the long and short circuit boards may have 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 adhesion, 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 which integrally forms a power supply.
In the design of the power supply module, the external driving signal may be a low-frequency ac signal (e.g., provided by the utility power), a high-frequency ac signal (e.g., provided by the electronic ballast), or a dc signal (e.g., provided by the battery or an external driving power), and may be input to the LED straight tube lamp in a single-end power driving scheme or a double-end power driving scheme. In the driving structure of the double-ended power supply, the external driving signal can be received by using only one end as the single-ended power supply.
When the DC signal is used as the external driving signal, the power supply component of the LED straight tube lamp can omit the rectifying circuit.
In the design of the rectifying circuit of the power supply assembly, a single rectifying unit or a double rectifying unit can be provided. The first rectifying unit and the second rectifying unit in the double rectifying circuits are respectively coupled with pins of lamp caps arranged at two ends of the LED straight lamp. The single rectifying unit is suitable for the driving structure of the single-ended power supply, and the double rectifying units are suitable for the driving structure of the single-ended power supply and the double-ended power supply. And at least one rectifying unit is configured, the driving circuit 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 unit 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 a half-wave rectification circuit and a full-wave rectification circuit.
In the pin design of the LED straight lamp, the LED straight lamp may be a single-ended dual-pin (two pins in total, and no pin at the other end), a single-pin (two pins in total) at both ends, or a dual-pin (four pins in total) at both ends. The structure of single-end double-pin and double-end single-pin can be applied to the design of the rectifier circuit of a single rectifier circuit. Under the framework of double-end double-pin structure, the structure is suitable for the design of a double-rectification circuit, and any one of the double-end double-pin structure or any one of the single-end double-pin structure is used for receiving an external driving signal.
In the filter circuit design of the power supply component, a single capacitance or pi-type filter circuit can be provided to filter the high frequency component in the rectified signal and provide a low ripple DC signal as the filtered signal. The filter circuit may also include an LC filter circuit to present a high impedance for a particular frequency to comply with UL certification current magnitude specifications for the particular frequency. Moreover, the filter circuit further comprises a filter unit coupled between the pin and the rectifying circuit so as to reduce electromagnetic interference caused by the circuit of the LED lamp. When the DC signal is used as an external driving signal, the power supply component of the LED straight tube lamp can omit a filter circuit.
In the design of the LED driving module of the power supply module, only the LED module may be included, or both the LED module and the driving circuit may be included. The voltage stabilizing circuit can also be connected with the LED driving module in parallel to ensure that the voltage on the LED driving module is not over-voltage. The voltage regulator circuit may be a clamp circuit, for example: zener diodes, bidirectional voltage regulators, etc. When the rectification circuit comprises a capacitor circuit, a capacitor can be connected between one pin at each end of the two ends and one pin at the other end in pairs so as to perform voltage division with the capacitor circuit to serve as a voltage stabilizing circuit.
In addition, a protection circuit may be additionally added to protect the LED module. The protection circuit can detect the current and/or the voltage of the LED module to correspondingly start corresponding overcurrent or overvoltage protection.
In the design of the auxiliary power module of the power module, the energy storage unit can be a battery or a super capacitor and is connected with the LED module in parallel. The auxiliary power supply module is suitable for the design of an LED driving module comprising a driving circuit.
In the LED module design of the power supply assembly, the LED module may comprise a plurality of strings of LED assemblies (i.e., a single LED chip, or a LED group consisting of a plurality of LED chips of different colors) connected in parallel with each other, and the LED assemblies in each string of LED assemblies may be connected to each other to form a mesh connection.
That is, the above features can be arbitrarily arranged and combined, and used for the improvement of the LED straight tube lamp.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (22)
1. A lamp, comprising:
a lamp (1) for receiving an external driving signal;
a first rectifying circuit (510) for rectifying the external driving signal to generate a rectified signal;
a filter circuit (520) coupled to the first rectifying circuit (510), the filter circuit (520) having a first filter output (521) and a second filter output (522) and being configured to filter the rectified signal to generate a filtered signal;
an LED driver module (530) coupled to the filter circuit (520) and comprising a driver circuit (1530) and an LED module (630), wherein the driver circuit has a first driver output (1521) and a second driver output (1522) and is configured to receive the filtered signal and generate a driving signal, and the LED module (630) is configured to receive the driving signal and emit light; and
a mode switching circuit (580) coupled to at least one of the first filter output terminal (521) and the second filter output terminal (522) and to at least one of the first drive output terminal (1521) and the second drive output terminal (1522) for determining whether to perform a first drive mode or a second drive mode; wherein,
In the first driving mode, the filtered signal is input to the driving circuit (1530), and in the second driving mode, the filtered signal is input to and drives the LED module (630) bypassing a component of the driving circuit (1530).
2. The lamp of claim 1, wherein the lamp is an LED lamp or the lamp is a straight LED lamp.
3. The lamp of claim 1, wherein the mode switching circuit (580) determines to input the filtered signal directly to the driving circuit (1530) or directly to the LED module (630) according to a frequency of the external driving signal.
4. The lamp of claim 1, wherein the mode switching circuit (580) inputs the filtered signal directly to the LED module (630) when the frequency of the external driving signal is higher than a predetermined mode switching frequency, and inputs the filtered signal directly to the driving circuit (1530) when the frequency of the external driving signal is lower than the predetermined mode switching frequency.
5. A lamp, comprising
A lamp tube (1), a first pin and a second pin, a first rectifying circuit (510), a second rectifying circuit (540), a filter circuit (520), an LED driving module (530), and a mode switching circuit (580);
The first pin and the second pin are coupled with the lamp tube and used for receiving an external driving signal;
the first rectifying circuit is used for rectifying the external driving signal to generate a rectified signal;
the filter circuit (520) has a first filter output (521) and a second filter output (522), and is configured to filter the rectified signal to generate a filtered signal;
the LED driver module comprises a driver circuit (1530) and an LED module (630), the driver circuit having a first driver output (1521) and a second driver output (1522); the mode switching circuit (580) is coupled; at least one of said first filtered output (521) and said second filtered output (522); and the number of the first and second groups,
at least one of the first drive output (1521) and the second drive output (1522) is used for determining whether a first drive mode or a second drive mode is performed.
6. The lamp of claim 5, wherein the lamp is an LED lamp or the lamp is a straight LED lamp.
7. The lamp of claim 5,
the driving circuit (1630) is a step-down DC-to-DC conversion circuit, comprising
A controller (1631) and a conversion circuit, wherein the conversion circuit comprises an inductor (1632), a freewheeling diode (1633), and a switch (1635);
the driving circuit (1630) is coupled to the first filter output terminal (521) and the second filter output terminal (522) to drive the LED module coupled between the first driving output terminal (1521) and the second driving output terminal (1522).
8. The lamp of claim 5,
the driving circuit (1730) is a boost DC-to-DC conversion circuit, which includes a controller (1731) and a conversion circuit,
the conversion circuit comprises an inductor (1732), a freewheeling diode (1733), and a switch (1735);
one end of the inductor (1732) is coupled to the first filtering output end (521), and the other end of the inductor is coupled to the anode of the current filtering diode (1733) and the first end of the switch (1735);
a second terminal of the switch (1735) is coupled to the second filter output terminal (522) and the second driving output terminal (1522); the cathode of the freewheeling diode (1733) is coupled to the first driving output terminal (1521).
9. The lamp of claim 8,
the controller (1731) is coupled to a control terminal of the switch (1735), and controls the switch (1735) to turn on or off according to the current detection signal (S531) and/or the current detection signal (S535);
When the switch (1735) is switched on, the inductor (1732) is in an energy storage state;
when the switch (1735) is turned off, the inductor (1732) is in a de-energized state, and the current of the inductor (1732) is reduced along with time; the current of the inductor (1732) freewheels through a freewheeling diode (1733) to the LED module.
10. The lamp of claim 5,
the driving circuit (1830) is a step-down dc-to-dc conversion circuit,
includes a controller (1831) and a switching circuit,
the conversion circuit comprises an inductor (1832), a freewheeling diode (1833), and a switch (1835);
the driving circuit (1830) is coupled to the first filter output terminal (521) and the second filter output terminal (522).
11. The lamp of claim 10,
the anode of the freewheeling diode (1833) is coupled to the second filter output terminal (522) and the cathode is coupled to the switch (1835);
one end of the inductor (1832) is coupled to the second end of the switch (1835), and the other end is coupled to the first driving output terminal (1521);
the second drive output (1522) is coupled to the anode of the freewheeling diode (1833).
12. The lamp of claim 11,
The first end of the switch (1835) is coupled to the first filter output end (521), the second end is coupled to the negative electrode of the freewheeling diode (1833), and the control end is coupled to the controller (1831) to receive a control signal from the controller (1831) so as to enable the first end and the second end to be turned on or off.
13. The lamp of claim 5,
the driving circuit (1930) is a step-down DC-to-DC conversion circuit, which comprises a controller (1931) and a conversion circuit,
the conversion circuit includes an inductor (1932), a freewheeling diode (1933), and a switcher (1935);
the driving circuit (1930) is coupled to the first filtered output (521) and the second filtered output (522);
one end of the inductor (1932) is coupled to the first filtering output end (521) and the second driving output end (1522), and the other end of the inductor is coupled to the first end of the switch (1935);
a second terminal of the switch (1935) is coupled to the second filtered output terminal (522), and a control terminal is coupled to the controller (1931);
the anode of the freewheeling diode (1933) is coupled with the connection point of the inductor (1932) and the switch (1935), and the cathode of the freewheeling diode is coupled with the first drive output end (1521).
14. The lamp of claim 7,
The mode switch circuit (680) includes a mode switch (681), the mode switch (681) having a first terminal (683), a second terminal (684), and a third terminal (685),
the first terminal is coupled to the second drive output (1522),
the second endpoint (684) is coupled to the second filtered output (522),
the third terminal (685) is coupled to the inductor (1632).
15. The lamp of claim 9,
the mode switching circuit comprises
A mode switch (781) having a first end point (783), a second end point (784), a third end point (785),
the first terminal (783) is coupled to the second filtered output (522),
the second terminal (784) is coupled to the second driving output (1522) and
the third terminal (785) is coupled to a switch (1635) of the driving circuit (1630).
16. The lamp of claim 9,
the mode switching circuit (880) comprises a mode switching switch (881),
the mode switch (881) has a first end (883), a second end (884), and a third end (885),
the first end point (883) is coupled to a first filter output (521),
The second terminal (884) is coupled to the first driving output terminal (1521) and
the third terminal (885) is coupled to the inductor (1732).
17. The lamp of claim 9,
the mode switching circuit (980) includes a mode switching switch (981),
the mode switch (981) has a first end (983), a second end (984), a third end (985),
the first terminal (983) is coupled to the first driving output terminal (1521),
the second end point (984) is coupled to the first filter output end (521) and
the third terminal (985) is coupled to a cathode of the freewheeling diode (1733).
18. The lamp of claim 12, wherein the mode switching circuit (1680) comprises a mode switching switch (1681),
the mode switch (1681) has a first terminal (1683), a second terminal (1684), and a third terminal (1685),
the first terminal (1683) is coupled to the first filter output terminal (521),
the second terminal (1684) is coupled to the first driving output terminal (1521) and
the third terminal (1685) is coupled to the switch (1835).
19. The lamp of claim 12,
the mode switching circuit (1780) includes
A mode switching switch (1781), the mode switching switch (1781) having a first endpoint (1783), a second endpoint (1784), a third endpoint (1785),
The first terminal (1783) is coupled to the first filter output terminal (521),
the second terminal (1784) is coupled to the first driving output terminal (1521) and
the third terminal (1785) is coupled to the inductor (1832).
20. The lamp of claim 13, wherein the mode switching circuit (1880) comprises a first mode switch (1881) and a second mode switch (1882),
the first mode switch (1881) having a first endpoint (1883), a second endpoint (1884), a third endpoint (1885),
the first terminal (1883) is coupled to a first driving output (1521),
the second end point (1884) is coupled to the first filter output terminal (521) and
the third end point (1885) is coupled to the freewheeling diode (1933);
the second mode switch (1882) has a first end (1886), a second end (1887), and a third end (1888), the first end (1886) is coupled to the second driving output (1522), the second end (1887) is coupled to the second filtering output (522), and the third end (1888) is coupled to the first filtering output (521).
21. The lamp of claim 13,
the mode switching circuit (1980) comprises
A first mode changeover switch (1981) and a second mode changeover switch (1982),
The first mode switch (1981) has a first terminal (1983), a second terminal (1984), a third terminal (1985),
the first terminal (1983) is coupled to the second filtered output (522), the second terminal (1984) is coupled to the second driven output (1522) and the third terminal (1985) is coupled to the switch (1935);
the second mode switch (1982) has a first terminal (1986), a second terminal (1987), and a third terminal (1988), the first terminal (1986) is coupled to the first filter output (521), the second terminal (1987) is coupled to the first driver output (1521), and the third terminal (1988) is coupled to the second driver output (1522).
22. The lamp of any of claims 5-21, wherein the mode switch, the first mode switch, and the second mode switch are single pole double throw switches or two semiconductor switches.
Applications Claiming Priority (22)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510075925 | 2015-02-12 | ||
| CN2015100759257 | 2015-02-12 | ||
| CN2015101048233 | 2015-03-10 | ||
| CN201510104823 | 2015-03-10 | ||
| CN2015101345865 | 2015-03-26 | ||
| CN201510134586 | 2015-03-26 | ||
| CN2015101367968 | 2015-03-27 | ||
| CN201510136796 | 2015-03-27 | ||
| CN2015103734923 | 2015-06-26 | ||
| CN201510373492 | 2015-06-26 | ||
| CN201510428680 | 2015-07-20 | ||
| CN2015104286801 | 2015-07-20 | ||
| CN201510482944 | 2015-08-07 | ||
| CN2015104829441 | 2015-08-07 | ||
| CN201510486115 | 2015-08-08 | ||
| CN2015104834755 | 2015-08-08 | ||
| CN201510483475 | 2015-08-08 | ||
| CN2015104861150 | 2015-08-08 | ||
| CN2015105555434 | 2015-09-02 | ||
| CN201510555543 | 2015-09-02 | ||
| CN2015105951737 | 2015-09-18 | ||
| CN201510595173 | 2015-09-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205584535U true CN205584535U (en) | 2016-09-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620005863.2U Active CN205584535U (en) | 2015-02-12 | 2016-01-04 | Lamp |
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| Country | Link |
|---|---|
| CN (1) | CN205584535U (en) |
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- 2016-01-04 CN CN201620005863.2U patent/CN205584535U/en active Active
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