CN103375714A - LED Lighting Tubes for Fluorescent Lighting Fixtures - Google Patents

Abstract

An LED lighting light pipe for a fluorescent lighting fixture. The invention provides an LED lighting light pipe, comprising: a translucent housing comprising opposing first and second axial edges defining a gap therebetween; a heat sink having a securing portion, the heat sink configured to couple with the housing such that the heat sink covers the gap of the housing, wherein the heat sink and the housing together define a tubular structure having an interior cavity, the interior cavity comprising a lower cavity half and an upper cavity half, and the securing portion is located in the lower cavity half; a circuit board fixed on the fixing portion of the heat sink in a heat conductive manner; at least one LED light source mounted on the circuit board; and two end caps configured to fit over both ends of the tubular structure. The LED illuminating light tube has an illuminating mode with a relatively wide illuminating angle, can realize efficient and uniform illumination, and has high luminous flux.

Description

LED Lighting Tubes for Fluorescent Lighting Fixtures

technical field

The present invention generally relates to an LED lighting light pipe. More specifically, the present invention relates to an LED lighting light pipe, which has a lighting mode with a relatively wide lighting angle, can realize high-efficiency and uniform lighting, and has high-efficiency luminous flux.

Background technique

Fluorescent tubes are widely used in commercial, industrial and domestic applications due to their low cost and high efficacy. Billions of fluorescent tubes have been installed around the world. However, fluorescent tubes utilize mercury to emit ultraviolet light, a harmful element, which may affect human health. Also, the lifetime of fluorescent tubes is limited to about 15,000 hours or less.

Introduced in the 1960s as a solid-state light source, LEDs (Light Emitting Diodes) offer long life, robust construction, low power consumption, and flexible size, making them increasingly popular. LED lighting tubes for fluorescent lighting fixtures have been developed to replace traditional fluorescent tubes. The length and diameter of these LED lighting light pipes are sized to fit existing fluorescent lighting fixtures.

However, due to the limited characteristics of point light sources and limited lighting angles, the performance of existing LED lighting light pipes cannot meet the following strict requirements for professional lighting: According to general lighting design principles, the lighting source needs to match the lighting luminosity, and the target lighting area should be relatively large. Wide lighting angle provides sufficient light intensity evenly distributed.

US Patent No. 7,049,761 discloses a lighting light pipe, which includes a bulb portion and a circuit board on which LEDs are installed. The circuit board is mounted on an H-shaped structure in cross-section, and the LEDs are all mounted high on the upper half of the bulb portion. The lighting angle of the lighting light pipe is limited to 120 degrees or less, because of the H-shaped structure, the light path of the lower half of the H-shaped structure of the bulb part is very dark.

US patent application 2010/0265732 discloses a lighting light pipe with an LED light source, including a housing, a control circuit, an LED circuit board inside the housing, and LEDs mounted on the LED circuit board. Likewise, the LEDs are all mounted in the upper half of the housing within the lighting light pipe, resulting in a limited angle of illumination as in US Patent No. 7,049,761. In addition, the LEDs are distributed far apart from each other, which results in an uneven distribution of light along the illumination light pipe, and unnaturally bright spots can be clearly observed.

US Patent Application No. 2010/0157608 discloses an LED lighting light pipe, which includes a casing, an aluminum substrate installed in the casing and supporting a plurality of LEDs, and at least two reflective elements respectively arranged on opposite sides of the LEDs. Ribs or similar structures are formed on the inner surface of the housing as reflective elements for diffusing light. A potential disadvantage of this lighting light pipe is that the two reflective elements limit its lighting angle and the thickness of the tubular housing reduces the light output.

US Patent 8115411 discloses an LED lighting system. The lighting angle of the lighting system is increased by using multiple strings of LEDs installed in the lighting light pipe at different angles. This certainly leads to high cost, and the heat dissipation efficiency of the LED is low.

Although there are various LED lighting light pipes in the prior art, the disadvantages of these lighting light pipes are that the lighting angle is relatively narrow and the light distribution is not uniform. Even if a scattering structure is provided on the housing of the lighting light pipe above the LEDs, the light will be scattered near the top scattering area. Therefore, the final lighting angle of the lighting light pipe is still small, and most of the light pipe cannot emit light and form a dark area.

Therefore, there is a need for an LED lighting light pipe, which can provide uniform lighting along the light pipe at an effective cost, and has an illumination angle of 270 degrees or more, so as to be suitable for various lighting occasions. There is also a need for an LED lighting light pipe, which can improve luminous efficiency and reduce light energy loss.

Contents of the invention

In order to meet the above needs, it is a primary object of the present invention to provide an LED lighting light pipe that produces a high lumen output that is uniformly distributed along the length of the light pipe and that has an illumination angle of 270 degrees or more.

Another object of the present invention is to provide an LED lighting light pipe that uses low power LEDs to obtain a natural and evenly distributed lighting pattern, has high luminous efficiency, and better dissipates heat generated by the LEDs during operation.

Another object of the present invention is to provide an LED lighting light tube for fluorescent lighting fixtures, replacing traditional fluorescent tubes.

These and other objects and advantages of the present invention are achieved by providing an LED lighting light pipe comprising:

a translucent housing comprising opposed first and second axial edges with a gap formed therebetween;

a heat sink having a fixed portion configured to be coupled to the housing such that the heat sink covers the notch of the housing, wherein the heat sink and the housing together define an inner a lumen tubular structure, the lumen comprising a lower lumen and an upper lumen, the fixation portion being located in the lower lumen;

a circuit board heat-conductively fixed on the fixed portion of the heat sink;

at least one LED light source mounted on said circuit board; and

Two end caps are configured to fit over the ends of the tubular structure.

Because the LED light source is installed at a very low position in the inner cavity of the tubular structure and the housing is made of selected materials, the light emitted by the LED lighting light pipe can cover Very wide angles are 270 degrees or more. By selecting a material with an appropriate combination of light scattering, transmissive and reflective properties, the housing can produce uniformly distributed illumination along the length of the light pipe with high luminous efficiency. Preferably, the material has a haze of about 85-99% and a light transmittance of about 55-75%. Advantageously, said material is configured to have a surface roughness of less than 0.8 μm, such as 0.6 μm or 0.7 μm. Said material can be chosen from transparent plastic or glass doped with a diffusing substance selected from powders of aluminum oxide, titanium oxide, silicon dioxide or other new nanotechnological compounds. Preferably, the diffused substance is made into a nanopowder form by nanotechnology.

In a preferred embodiment of the invention, said material is polycarbonate doped with a diffusing substance such as titanium oxide powder. Preferably, the thickness of the shell made of the polycarbonate is about 0.5-1.5 mm, and the polycarbonate has a haze of about 90%-99% and a transparency of about 60%-70%. light rate.

In one embodiment of the present invention, the heat sink is provided with a fixing element along two opposite axial sides of the fixing part, which are used to engage and fix the circuit board, so as to fix the circuit board on the on the radiator. Advantageously, a thermally conductive material, such as thermal oil, is applied between said circuit board and said heat sink.

The first and second axial edges of the housing have first and second inwardly extending flanges, respectively. The radiator spans both ends of the tubular structure. The heat sink is provided with two notches positioned to receive and securely hold the first and second flanges in place. This ensures a firm connection between the housing and the heat sink.

For a better heat dissipation effect, the heat sink has a plurality of fins arranged at intervals on its outer surface.

To enhance heat dissipation, said heat sink is advantageously formed of a thermally conductive material selected from the group comprising aluminium, aluminum alloys, plastics and ceramics.

In another embodiment of the present invention, the circuit board runs through the entire tubular structure between two ends of the tubular structure. The circuit boards include a first circuit board having a bridge rectifier and at least one second circuit board, the components all electrically coupled to each other. One of the end caps has two pin connectors electrically coupled to the first circuit board. The other end cap has two pin connectors forming a short circuit and is electrically insulated from the circuit board. Both end caps are configured to be coupled with a socket of a fluorescent tube.

Preferably, all LED light sources used are arranged in a straight line and mounted on the circuit board.

The circuit board can be made of glass fiber reinforced epoxy laminate FR-4, composite epoxy material CEM-1/CEM2 or metal core printed circuit board (MCPCB). The thickness of the circuit board is preferably 1 mm or less, so that there is good heat conduction between the LED light source installed on one side of the circuit board and the heat sink in contact with the other side of the circuit board .

According to the present invention, the LED control circuit including the driver and other electronic components are not placed inside the light pipe, but instead they are installed inside the lighting fixture. This arrangement keeps the control circuit away from high temperatures caused by thermal energy generated by the plurality of LED light sources during normal operation, thus increasing its reliability and durability.

Compared with the existing LED lighting light pipe in the prior art, the LED lighting light pipe of the present invention is constructed so that all LED light sources are arranged in a straight line and installed at a very low position in the lower half cavity of the cross section of the light pipe . This increases the total illuminated surface area on the housing, especially on the lower cavity. Another feature of the LED lighting light pipe of the present invention is that the material of the casing is selected so that the light emitted from the LED light source is transmitted, scattered and reflected in the casing, resulting in more uniform light intensity and a larger lighting angle. By choosing materials and controlling the thickness of the housing, a portion of the light can be redirected through the housing, reducing light energy loss. Because the light output is effectively increased, it is possible to use low power LEDs, which allows the use of smaller sized heat sinks.

In order to better understand the present invention, the present invention and its embodiments will be described in detail with reference to the accompanying drawings.

Description of drawings

Figure 1 is a perspective view of an LED lighting light pipe constructed in accordance with an embodiment of the present invention.

Fig. 2 is an exploded view of the LED lighting light pipe in Fig. 1 .

FIG. 3 is a top view of the LED lighting light pipe in FIG. 1 .

FIG. 4 is a bottom view of the LED lighting light pipe in FIG. 1 .

FIG. 5 is a side view of the LED lighting light pipe in FIG. 1 .

Fig. 6 is a sectional view along line A-A in Fig. 5 .

FIG. 7 is an end side view of the LED lighting light pipe of FIG. 1 .

FIG. 8 shows light emission through the housing of the LED lighting light pipe in FIG. 1 , wherein the light emission includes transmitted light emission, scattered light emission, reflected light emission and backflow light emission.

FIG. 9A is a schematic diagram of the lighting pattern of a traditional T8 LED lighting light pipe measured under free lighting conditions.

Fig. 9B is a schematic diagram of the lighting mode of the T8 LED lighting light pipe of the present invention measured under the condition of free lighting.

9C is a schematic diagram of the lighting pattern of a conventional T8 LED lighting light pipe measured under the condition of emitting light in a wide-angle specular reflector fluorescent lighting fixture.

9D is a schematic diagram of the lighting mode of the T8 LED lighting light pipe of the present invention measured under the condition of emitting light in a wide-angle specular reflector fluorescent lighting fixture.

FIG. 10A is a circuit diagram of a first PCB used in the LED lighting light pipe in FIG. 1 .

FIG. 10B is a circuit diagram of a second PCB used in the LED lighting light pipe in FIG. 1 .

FIG. 11 is a schematic diagram of the electrical connections of the PCBs in the LED lighting light pipe in FIG. 1 .

12A and 12B are schematic diagrams of the electrical connection between the LED lighting light pipe and the power supply in FIG. 1 , showing that the lighting light pipe can be connected in any one of two directions.

Detailed ways

While the present invention has been illustrated and described in terms of preferred embodiments, the LED lighting light pipe of the present invention can be made from many different materials in a variety of configurations, sizes and forms.

Referring now to the drawings, FIGS. 1 to 7 provide an LED lighting light pipe 100 constructed in accordance with a preferred embodiment of the present invention. The length and diameter of the LED lighting light pipe 100 are made to be suitable for replacing traditional fluorescent tubes in fluorescent lighting fixtures. In this embodiment, the LED lighting light pipe 100 includes a casing 10 , a heat sink 20 , a circuit board 30 , a plurality of LED light sources 40 and two end caps 50 . The LED lighting light pipe also includes a control circuit (not shown) for controlling the LED light source. The control circuit is mounted outside the LED lighting light pipe 100 but fixed in the fluorescent lighting fixture (see FIGS. 12A and 12B ). This arrangement of the control circuit not only prevents the control circuit from being affected by high temperature caused by the heat generated by the LED light source, but also ensures that the light emission of the LED light source through the light pipe will not be affected by the control circuit Blocking, unlike the LED lighting light pipe in the prior art, the control circuit is arranged in the light pipe. The control circuit is not the main point of the present invention, so it will not be described in detail here.

The housing 10 has a substantially omega-shaped cross-section. The housing comprises opposed first and second axial edges 11, 12 with a gap 13 formed therebetween. First and second flanges 14, 15 extend axially inwardly from said first and second axial edges 11, 12, respectively. Although the illustrated housing 10 is omega-shaped, housings having square, triangular or other cross-sectional shapes may also be used. The housing is made of materials with light scattering, reflection and transmission properties for providing uniform light distribution and increasing the illumination angle of light distribution. This will be described in detail below.

The radiator 20 is configured to be coupled with the casing 10 such that the radiator 20 completely covers the notch 13 of the casing 10, thereby defining a tubular structure. As shown in FIGS. 2 to 6 , the radiator 20 spans both ends of the tubular structure. The heat sink 20 includes: two notches 21, 22, their positions correspond to the flanges 14, 15 of the housing 10; The circuit board 30 of the LED light source 40 . By clamping the flanges 14, 15 in the notches 21, 22, the housing 10 and the heat sink 20 can be securely fixed together, thereby defining a tubular structure having an internal cavity. Of course, the housing 10 and the heat sink 20 can be fixed together using known techniques such as snap-fitting or fasteners. The lumen of the tubular structure consists of two parts bisected along the horizontal central axis B-B: an upper lumen 16 and a lower lumen 17 . The dimensions of the heat sink 20 are such that the fixed part 23 is located in the lower half-cavity 17, which allows more than half of the surface of the housing 10 to emit light. In this embodiment, the height of the heat sink 20 is such that the fixed portion 23 is located close to the bottom of the tubular structure, allowing a large portion of the tubular structure (eg more than 60% of the surface of the tubular structure) to emit light .

Fastening elements formed as slots 24 are provided along opposite two axial sides of the fastening portion 23 . The size and shape of the slot 24 is such that it snugly engages the circuit board 30, while the LED light source 40 mounted on the circuit board 30 is exposed in the center. A layer of heat conduction material such as heat conduction oil is applied between the circuit board 30 and the fixed portion 23 of the heat sink 20 to obtain better heat conduction effect. Of course, the circuit board 30 can be fixed on the heat sink 20 by using techniques known in the art to form better heat conduction and heat dissipation performance between them. For example, the circuit board 30 can be attached to the heat sink 20 by viscous thermal oil or glue. In addition, the heat sink 20 has a plurality of cooling fins 25 parallel to the axis of the tubular structure arranged at intervals on its outer surface. The disposition of the heat sink 25 further promotes the dissipation of heat generated by the LED light source 40 . The heat sink 20 also includes screw holes 26 at two ends thereof, and the positions of the screw holes 26 correspond to the screw holes 52 of the end cover 50 .

Preferably, said heat sink 20 is formed of a thermally conductive material selected from the group comprising metals such as aluminum and aluminum alloys, plastics and ceramics. The material of the heat sink 20 preferably has high mechanical strength so that the tubular structure formed by coupling the heat sink and the housing together remains rigid over a required length.

The circuit board 30 is formed by electrically connecting a first printed circuit board (PCB) 31 and a plurality of second printed circuit boards (PCB) 32 . The first and second PCBs may be connected by electrical connectors 34 (see FIG. 11 ). The first PCB 31 is configured to include a bridge rectifier 33 so that the lighting light pipe is insensitive to the polarity of the DC current provided by the control circuit, so that the lighting light pipe 100 can be oriented in either direction Operationally mounted on the fluorescent lighting fixture. The second PCB 32 does not have a rectifier. Alternatively, the circuit board 30 may be integral and include a bridge rectifier at one end. The circuit board 30 includes: an LED mounting surface on which the LED light source 40 is mounted; and a heat transfer surface opposite to the LED mounting surface, for promoting heat transfer from the LED light source 40 to the heat sink 20 . The circuit board 30 may be a conventional FR4 or CEM type, or a Metal Core Printed Circuit Board (MCPCB) for better thermal management. As mentioned above, the circuit board 30 slides into the slot 24 of the heat sink and is held in place.

The LED light source 40 can be LED, LED package or LED array. All LED light sources 40 may be connected in series and/or in parallel, but they are axially mounted on the circuit board 30 in a straight line. In terms of the heat dissipation capability of the heat sink and the light output efficiency of the lighting light pipe, the linear arrangement of the LED light sources is cost-effective. The number of LED light sources 40 installed in the lighting light pipe 100 is selected to suit the actual needs and the power required by a particular application. For example, a row of 144 LEDs with a total consumption of 33W obtains an output of 3000 lumens at a color temperature of 4000K.

10A and 10B represent circuit diagrams of the LED light sources installed on the first PCB 31 and the second PCB 32, respectively. The LED light source 40 can be installed on the first PCB 31 and the second PCB 32 by welding, snap-fit connection or other known methods. Due to the improved light emission for reasons discussed below, the light output of the LED lighting light pipe 100 can be enhanced in luminous efficiency compared to existing LED lighting light pipes of the prior art, and it was found that the LED lighting light The luminous flux of the tube 100 is greater. Therefore, the LED lighting light pipe 100 can use a low-power LED light source to provide a natural and evenly distributed lighting pattern. This saves energy and enables the use of smaller sized heat sinks.

End caps 50 are provided adapted to be fitted at both ends of the tubular structure defined by said housing 10 and said heat sink 20 . Fig. 7 is an end side view of the end cap 50, which is a G13 end cap suitable for coupling with a conventional fluorescent lighting fixture. It can be understood that the end cap can have other structures. In this embodiment, each end cap 50 includes two plug connectors 51 and screw holes 52 for connecting with the socket of the fluorescent tube. The two plug connectors 51 of one of the end caps 50 are electrically connected to the rectifier 33 of the first PCB 31 for providing power to the LED light source 40. The two pin connectors 51 of the other end cover 50 together form a short circuit structure and are electrically insulated from the second PCB 32. With this wiring arrangement, no matter in which direction the LED lighting light pipe 100 is inserted into the socket of the fluorescent tube, the LED lighting light pipe 100 can keep working normally, which is more clearly shown in FIGS. 12A and 12B . As shown in the figure, the LED lighting light pipe 100 can be installed on the lamp holder without distinguishing the polarity of the LED light source 40 . The end cover 50 and the heat sink 20 can be fixed together by self-tapping screws 53 passing through the screw holes 52 of the end cover 50 and the screw holes 26 of the heat sink 20 . The end cap 50 may be made of plastic, metal, or a combination thereof.

Preferably, the inner surface of the housing 10 and the exposed surface of the circuit board 30 are made reflective, so as to enhance light reflection in the inner cavity of the lighting light pipe. For example, these surfaces can be configured as white reflective surfaces.

Assembling the LED lighting light pipe 100 includes: electrically connecting the first and second PCBs to form the circuit board 30 on which the LED light source is mounted; fixing the circuit board 30 on the radiator 20 ; coupling the housing 10 and the heat sink 20 ; and, installing the end caps 50 on both ends of the tubular structure, thereby forming a solid integrated lighting light pipe structure.

A feature of the invention is the choice of material for said housing 10 . By selecting a material with an appropriate combination of light scattering, light transmissive and light reflective properties, the housing can increase the illumination angle of light emitted from the LED light source to 270 degrees or more, and also enable uniform light distribution. Specifically, the selected material should allow the light emitted from the LED light source to pass through the housing 10 in the form of light transmission, light scattering, light reflection and light return.

The degree to which a material scatters and transmits light is called "haze." The haze can be controlled by the doping degree of the micro-diffusion species in the material, such as titanium oxide powder. The higher the doping, the more light is scattered to adjacent areas and the less light is transmitted directly through the material, resulting in higher light attenuation and lower light output, in this case low transmission and high haze conditions . Conversely, if there is too little dopant, more light escapes from the material and the scattering effect of the material is worse, leading to observed bright spots and non-uniform light distribution along the length of the illuminated light pipe, which is a case of high transmission and low fog conditions.

In order to achieve uniform light distribution and efficient light extraction as described above, the material of the housing 10 should be properly selected. Said housing 10 may be made of polycarbonate, acrylic/plexiglass, glass or other suitable transparent material doped with diffusing substances such as titanium oxide, aluminum oxide, silicon dioxide, etc. to obtain the fog required according to the invention degree and transmittance. In a preferred embodiment, the material of the housing 10 is polycarbonate doped with titanium oxide, its haze is about 90%-99%, preferably 96%-99%, and the transmittance is about 60% %-70%.

FIG. 8 is a schematic diagram of light passing through the housing 10 . The thick line represents a part of the light 61 directly emitted from the LED light source 40 , a part of the light 61 passes through the housing 10 to form the main light emission. The thin line represents the portion of light 62 that is first reflected from the housing 10 and then passes through the lower cavity 16 of the housing 10, which facilitates increasing the illumination angle beyond 270 degrees.

As mentioned above, the inner surface of the housing 10 is highly reflective. Most of the incident light generated by the LED light source 40 is reflected back into the inner cavity of the lighting light pipe. The reflected light may leave the housing 10 from a different angle or direction than the coverage of the main light emission of the LED determined by the transmitted light 61 (less than 120 degrees). The reflected light can also generate secondary reflow reflection on the reflective inner surface of the housing 10 , the exposed reflective surface of the heat sink 20 and the circuit board 30 , and a part of reflow light 63 is obtained. Although the return light 63 is not as bright as the transmitted light 61 and the directly reflected light 62, it not only extends the light to a lower angular position very close to the bottom of the tubular structure, but also enhances the illuminating light. The light output of the tube 100. The inner surface of the housing 10 can be constructed to have a surface roughness of less than 0.8 μm to enhance reflection and reflow of light.

Another part of the light emission of the housing 10 is scattered light 64 as indicated by the dashed lines in FIG. 8 . The scattered light can be obtained by selecting a material with light scattering properties, and the material has a controllable diffusion index, so that the light is emitted at a wider illumination angle. It can be seen from FIG. 8 that the diffused light 64 can diffuse the light uniformly and extract the light more effectively in a wider illumination angle.

The thickness of the housing also affects its transmittance. With the same level of diffuse doping, thinner housings are more cost-effective, as less material is used but a higher maximum light output is obtained. However, the thinner the diffuser is, the weaker the structure of the lighting light pipe will affect its mechanical strength. In one embodiment of the present invention, the diameter of the illumination light pipe is 1 inch, and the thickness of the housing 30 is 0.5 to 1.5 mm, preferably 1.0 mm.

Please refer now to Figures 9A to 9D. These figures represent the lighting patterns of the conventional T8 LED lighting light pipe and the LED lighting light pipe 100 measured under free lighting conditions and lighting conditions installed in a wide-angle mirror reflector fluorescent lighting fixture, wherein the LED lighting The housing 100 of the light pipe is made of polycarbonate doped with titanium oxide and has better haze and transmittance as described above. The term "free light" refers to the condition where the light pipe is not coupled to conduct under any light pipe lighting fixture. The term "lighting in a wide-angle specular reflector fluorescent lighting fixture" refers to the situation where a light pipe conducts after being coupled to a light pipe lighting fixture with a wide-angle specular reflector. In these figures, the inner curve is measured when viewing the lighting light pipe from its end cap, and the outer curve is measured when viewing the lighting light pipe along its axis.

Figures 9A and 9C illustrate the lighting patterns obtained using conventional T8 LED lighting light pipes of the prior art. 9B and 9D illustrate the lighting patterns obtained using the T8 LED lighting light pipe 100 of the present invention. It can be seen that no matter viewing the lighting light pipe from the end cap of the lighting light pipe or along the axis of the lighting light pipe, the lighting coverage obtained by using the LED lighting light pipe 100 is greater than that obtained by using the conventional LED lighting light pipe scope. This shows that the LED lighting light pipe of the present invention has a wider lighting angle than the conventional LED lighting light pipe.

Therefore, the present invention provides an LED lighting light pipe for a fluorescent tube lighting fixture, which can uniformly distribute light and extract light more efficiently at a wider lighting angle of 270 degrees or more, instead of a conventional fluorescent tube. . The LED lighting light pipe improves light efficiency and has higher luminous flux. This is because the LED light source is placed close to the bottom of the light pipe and the housing material is chosen to have the required light scattering, light transmission and light reflection properties.

Although the essence of the present invention has been fully described according to some preferred embodiments, the present invention should not be limited to the structures and functions of the described embodiments and drawings. It is recognized that detailed variations can be made to the invention without altering, changing or modifying the basic principles of the invention. Many modifications and improvements that can be easily obtained by combining the common knowledge of the skilled person without departing from the scope of the present invention should belong to the scope of the present invention.

Claims (21)

1. a LED illumination light tube comprises:

Translucent housing, described translucent housing comprises the first and second relative axial edge, is formed with a breach between them;

Radiator with standing part, described radiator is configured to and described housing coupling, so that described radiator covers the described breach of described housing, wherein said radiator and described housing limit the tubular structure with inner chamber together, described inner chamber comprises second chamber and first chamber, and described standing part is arranged in described second chamber;

Be fixed on the circuit board on the described standing part of described radiator with heat-conducting mode;

Be installed at least one led light source on the described circuit board; And

Be configured to be fit to be installed in two end caps at the two ends of described tubular structure.

2. LED illumination light tube as claimed in claim 1 is characterized in that, selects transmissive, scattering and catoptrical material to make described housing.

3. LED illumination light tube as claimed in claim 2 is characterized in that, described material has the mist degree of about 85-99% and the light transmittance of about 55-75%.

4. LED illumination light tube as claimed in claim 3 is characterized in that, described material is selected from transparent plastics or the glass that is doped with diffusate.

5. LED illumination light tube as claimed in claim 4 is characterized in that, described diffusate is selected from titanium oxide, aluminium oxide, silica or zinc oxide.

6. LED illumination light tube as claimed in claim 4 is characterized in that, described material is the Merlon that is doped with titanium oxide.

7. LED illumination light tube as claimed in claim 6 is characterized in that, the thickness of the described housing of being made by described Merlon is about the 0.5-1.5 millimeter, and described Merlon has the mist degree of about 90%-99% and the light transmittance of about 60%-70%.

8. LED illumination light tube as claimed in claim 1 is characterized in that, described housing has surface roughness less than the inner surface of 0.8 μ m.

9. such as each described LED illumination light tube of claim 1 to 8, it is characterized in that described radiator respectively arranges a retaining element along two relative axle sides of described standing part, described retaining element is used for the fixing described circuit board of engagement.

10. such as each described LED illumination light tube of claim 1 to 8, it is characterized in that the first and second axial edge of described housing have respectively the first and second flanges that extend internally; Described radiator is crossed over the two ends at described tubular structure; Described radiator is provided with two notches, and the position of described two notches is constructed to hold and firmly fixes described the first and second flanges in position.

11. such as each described LED illumination light tube of claim 1 to 8, it is characterized in that, between described circuit board and described radiator, apply Heat Conduction Material such as conduction oil.

12., it is characterized in that described radiator has a plurality of fin of arranging with interval mode on its outer surface such as each described LED illumination light tube of claim 1 to 8.

13., it is characterized in that described radiator is formed by the Heat Conduction Material that is selected from the group that comprises aluminium, aluminium alloy, plastics and pottery such as each described LED illumination light tube of claim 1 to 8.

14. such as each described LED illumination light tube of claim 1 to 8, it is characterized in that described circuit board runs through whole described tubular structure between the two ends of described tubular structure; Described circuit board comprises first circuit board and at least one second circuit board, described first circuit board and the mutual electric coupling of described second circuit board with bridge rectifier.

15. LED illumination light tube as claimed in claim 14 is characterized in that, one of them described end cap has two pinned couplers with the described rectifier electric coupling of described first circuit board; Another end cap has two pinned couplers that form short circuit, with described second circuit board electric insulation.

16., it is characterized in that described circuit board is FR-4 type, CEM1 type, CEM2 type or metal-core printed circuit board such as each described LED illumination light tube of claim 1 to 8.

17., it is characterized in that described two end caps all are constructed to the lamp socket coupling with fluorescent tube such as each described LED illumination light tube of claim 1 to 8.

18., it is characterized in that described housing is made has reflective inner surface such as each described LED illumination light tube of claim 1 to 8; Described circuit board is made the reflecting surface with exposure.

19. such as each described LED illumination light tube of claim 1 to 8, comprising arranges in a line is installed in a plurality of led light sources on the described circuit board.

20. such as each described LED illumination light tube of claim 1 to 8, it is characterized in that, described led light source be arranged in second chamber of described tubular structure the position near described tubular structure bottom.

21. LED illumination light tube as claimed in claim 20 is characterized in that, the light illumination mode that described LED illumination light tube produces has the light angle greater than 270 degree.

Images