CN210688102U - Retro-reflection lighting device - Google Patents
Retro-reflection lighting device Download PDFInfo
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- CN210688102U CN210688102U CN201920444643.3U CN201920444643U CN210688102U CN 210688102 U CN210688102 U CN 210688102U CN 201920444643 U CN201920444643 U CN 201920444643U CN 210688102 U CN210688102 U CN 210688102U
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Abstract
A retro-reflection lighting device with uniform brightness distribution comprises a reflection plate, a light guide plate and an emergent plate, wherein an incident surface of the light guide plate is positioned at the corner of the light guide plate and is provided with an LED light source, a plurality of groups of microprisms distributed from near to far around a concentric curve of the LED light source are distributed on the top surface of the light guide plate, a plurality of groups of light distribution convex edge rings are distributed on the top surface of the emergent plate from near to far in a concentric curve manner, and the microprisms fall in the light distribution convex edge rings in the vertical direction; the LED light source comprises a retro-reflector lens, the center of the bottom surface is upwards sunken to form a light incidence surface, the light emergence surface covers above the bottom surface, a plurality of retro-reflectors are formed on the bottom surface and comprise an incidence surface and a plurality of refraction surfaces surrounding the incidence surface, the incidence surface and the refraction surfaces jointly form a polyhedral structure, a light reflection cavity is formed by surrounding the refraction surfaces, the part of light rays incident from the light incidence surface enters the light reflection cavity through the incidence surface after being reflected by the light emergence surface, and the light rays are refracted for a plurality of times by the refraction surfaces and then are parallel to each other and exit from the return incidence.
Description
Technical Field
The utility model relates to a lighting device.
Background
The existing lighting device such as a street lamp or a desk lamp has uneven brightness distribution and poor lighting effect due to unreasonable internal light emitting structure.
Disclosure of Invention
In order to overcome the above disadvantages, an object of the present invention is to provide a retro-reflective lighting device with smooth transition between light spots.
The utility model provides a retro-reflection lighting device, including reflecting plate, light guide plate, emergent plate, the light guide plate include first emergent face, with first top surface that first emergent face is relative, be located the incident plane that is used for receiving the light beam of side, the incident plane be located the corner of light guide plate, the incident plane on be provided with the LED light source, the reflecting plate be located the top of first top surface, first top surface on distribute and have a plurality of group's microprism, microprism be the concentric curve that encircles the LED light source and distribute from nearly to far away, microprism have first light facing surface and first backlight surface; the emergent plate comprises a second emergent surface and a second top surface opposite to the second emergent surface, the second top surface is positioned below the first emergent surface, a plurality of groups of light distribution convex edge rings are distributed on the second top surface, the light distribution convex edge rings are distributed from near to far in a concentric curve manner, the microprisms fall in the light distribution convex edge rings in the vertical direction, and the light distribution convex edge rings are provided with a second light facing surface and a second backlight surface; the LED light source comprises an LED chip and a retro-reflector lens positioned in the light-emitting direction of the LED chip, the retro-reflector lens comprises a circular bottom surface, a side surface surrounding the bottom surface and a light-emitting surface extending upwards along the side surface, the center of the bottom surface is recessed upwards to form a light incident surface, the light emergent surface covers the upper part of the bottom surface, a plurality of retro-reflectors are formed on the bottom surface, each retro-reflector comprises an incident surface and a plurality of refraction surfaces surrounding the incident surface, the incident surface and the refraction surface jointly form a polyhedral structure, a light reflection cavity is formed by surrounding the refraction surfaces, part of light rays incident from the incident surface enters the light reflection cavity through the incident surface after being reflected on the light emergent surface, and the light rays are refracted for multiple times through the refraction surface and then are emitted out from the return incident surface which is parallel and deviates to the outside.
Preferably, the slope of the concentric curve gradually increases in a clockwise direction.
Preferably, the height of the micro-prisms gradually increases along a direction away from the incident surface, and the pitch of the micro-prisms gradually decreases along a direction away from the incident surface.
Preferably, the first light-facing surface and the first backlight surface form an angle of α, the angle α varies in a range of α 1 to α 2 to α 3 in a direction away from the light incident surface, and α 3 > α 1 > α 2.
Preferably, the second light-facing surface and the second backlight surface form an angle of β, the angle β varies in a range of β 1 to β 2 to β 3 in a direction away from the light incident surface, and β 3 > β 1 > β 2.
Preferably, the refraction surface comprises a main refraction surface and an auxiliary refraction surface, the main refraction surface is opposite to the incident surface, and the auxiliary refraction surface is adjacent to the incident surface.
Preferably, the included angle between the refraction surfaces is larger than the total reflection angle.
Preferably, the retro-reflectors are distributed in a central symmetry manner and are inclined outward as a whole.
Preferably, the inner surface of the light incident surface is provided with a plurality of annular groove lines, and the annular groove lines are distributed along the height direction of the light incident surface.
Preferably, the center of the light emitting surface is recessed downwards towards the light incident surface and is located on the same central line with the central point of the light incident surface, the center of the light emitting surface is recessed towards the light incident surface so that incident light in a region near the central point reaches a total reflection condition, and incident light in the rest regions of the light emitting surface reaches a refraction and emergence condition.
Owing to adopted above technical scheme, the utility model discloses inside light-emitting is rational in infrastructure, luminance distribution is even, illuminating effect is better.
Drawings
Fig. 1 is a perspective view of a retro-reflective lighting device according to the present invention;
fig. 2 is a top view of a light guide plate of a retro-reflective lighting device according to the present invention;
fig. 3 is an optical schematic diagram of a retro-reflective lighting device according to the present invention;
fig. 4 is a schematic perspective view of a retro-reflector lens according to the present invention;
fig. 5 is a schematic front view of a retro-reflector lens according to the present invention;
fig. 6 is an enlarged partial view of a retro-reflector lens according to the present invention;
fig. 7 is a schematic view of the working principle of a retro-reflector lens according to the present invention;
fig. 8 is a comparison diagram of the illuminance distribution of the present embodiment.
Detailed Description
The following detailed description of the preferred embodiments of the present invention will be provided in conjunction with the accompanying drawings, so as to enable those skilled in the art to more easily understand the advantages and features of the present invention, and thereby define the scope of the invention more clearly and clearly.
Referring to fig. 1 to 3, fig. 1 is a perspective view of a retro-reflective lighting device according to the present invention, fig. 2 is a top view of a light guide plate of a retro-reflective lighting device according to the present invention, and fig. 3 is an optical schematic diagram of a retro-reflective lighting device according to the present invention. The utility model discloses a retro-reflection lighting device, including reflecting plate 22, light guide plate 9, outgoing plate 10.
The light guide plate 9 comprises a first emergent surface 11, a first top surface 12 opposite to the first emergent surface 11 and an incident surface 13 located on the side and used for receiving light beams, the incident surface 13 is located at the corner of the light guide plate 9, an LED light source is arranged on the incident surface 13, a reflecting plate 22 is located above the first top surface 12, a plurality of groups of micro prisms 14 are distributed on the first top surface 12, the micro prisms 14 are distributed from near to far in a concentric curve mode around the LED light source, the micro prisms 14 are provided with a first light facing surface 15 and a first backlight surface 16, the LED light source comprises an LED chip 7 and a retro-reflector lens located in the light emitting direction of the LED chip 7, the first light facing surface 15 and the first backlight surface 16 form a α angle, an α angle changes in a range from α 1 to α 2 to α 3 along the direction far away from the light incident surface, and α 3 is more than α 1 and more than α 2.
The emergent plate 10 comprises a second emergent surface 17 and a second top surface 18 opposite to the second emergent surface 17, the second top surface 18 is positioned below the first emergent surface 11, a plurality of groups of light distribution convex edge rings 19 are distributed on the second top surface 18, the light distribution convex edge rings 19 are distributed from near to far in a concentric curve mode, the micro prisms 14 fall in the light distribution convex edge rings 19 in the vertical direction, the light distribution convex edge rings 19 are provided with a second light facing surface 20 and a second backlight surface 21, the second light facing surface 20 and the second backlight surface 21 form a β angle, the β angle changes in the range from β 1 to β 2 to β 3 along the direction far away from the light facing surface, and β 3 is more than β 1 and more than β 2.
At the same position in the clockwise direction, the track of the concentric curve including the light-facing surface angle of the first light-facing surface 15 is uniform, and the slope of the concentric curve gradually increases in the clockwise direction. The height of the microprisms 14 gradually increases in a direction away from the incident surface, and the pitch of the microprisms 14 gradually decreases in a direction away from the incident surface. The light entering the light guide plate 9 through the incident surface 13 is separated on the first backlight surface 16, a part of the light is reflected by the S1 and enters the emergent plate 10, is refracted by the second backlight surface 21 and then exits from the second emergent surface 17, the other part of the light is transmitted by the S2 and then enters from the first light facing surface 15 after being reflected by the reflector 22, is refracted by the second light facing surface 20 and then exits from the second emergent surface 17, because the micro light distribution prism 14 falls in the convex edge ring 19 in the vertical direction, the light at the same position can be reused, the light fluxes superposed at two sides are equal at each position, and the light effect is uniform.
Fig. 4 is a schematic perspective view of a retro-reflector lens according to the present invention, fig. 5 is a schematic front view of a retro-reflector lens according to the present invention, and fig. 6 is a partial enlarged view of a retro-reflector lens according to the present invention; a retro-reflector lens comprises a circular bottom surface 1, a side surface 2 surrounding the bottom surface 1 and a light-emitting surface 3 extending upwards along the side surface 2, wherein the center of the bottom surface 1 is recessed upwards to form a light-entering surface 4, the light-emitting surface 3 covers the bottom surface 1, a plurality of retro-reflectors 5 are formed on the bottom surface 1, each retro-reflector 5 comprises an incident surface 6 and a plurality of refraction surfaces 7 surrounding the incident surface 6, the incident surface 6 and the refraction surfaces 7 jointly form a polyhedral structure, a light reflection cavity is formed by surrounding the refraction surfaces 7, part of light rays incident from the light-entering surface 4 enters the light reflection cavity through the incident surface 6 after being reflected by the light-emitting surface 3, and the light rays are refracted for multiple times by the refraction surfaces 7 and then exit from the incident surface 6 which.
The included angle between the refraction surfaces 7 is larger than the total reflection angle, the refraction surfaces 7 comprise a main refraction surface and an auxiliary refraction surface, the main refraction surface is opposite to the incident surface 6, and the auxiliary refraction surface is adjacent to the incident surface 6. The refraction surface 7 in this embodiment includes 3 main refraction surfaces, the main refraction surfaces are perpendicular to each other, the incidence surface 6 is provided with a sub-micron structure layer or an anti-reflection medium layer, and the retro-reflectors 5 are distributed with central symmetry and are wholly inclined outward, so that the incident light is wholly deflected outward and refracted out of the light-emitting surface 3.
The inner surface of the light incident surface 4 is provided with a plurality of annular groove lines 8, the annular groove lines 8 are distributed along the height direction of the light incident surface 4, the annular groove lines 8 can be a plurality of independent groove lines or can be an integral spiral line which spirals upwards, in the embodiment, the annular groove lines 8 are arranged at the positions between 1/3 and 2/3 of the light incident surface 4, and the distance between the annular groove lines 8 is gradually reduced from bottom to top.
As a refractive lens, the center of the light emitting surface 3 is recessed downward toward the light incident surface 4 and is located on the same center line with the center point of the light incident surface 4, the center of the light emitting surface 3 is recessed toward the light incident surface 4 so that the incident light in the region near the center point reaches the total reflection condition, and the incident light in the rest region of the light emitting surface 3 reaches the refraction and emission condition.
Fig. 7 is according to the utility model discloses a theory of operation schematic diagram of retro-reflector lens, ray a in this embodiment is emergent after 4 refractions through going into the plain noodles, and ray b, c, d, incide in trough line department, the annular trough line will inwards draw in (refraction angle reduces) in the light part of inciding in trough line department to disturb original light distribution mode, gather together original light distribution in trough line department is whole, produced light intensity offset distributes and the dark ring that forms superposes each other with original regularity, guarantee that holistic light intensity is even. Because the light on the light-emitting surface 3 has a part of reflected light A, the light A enters the incident surface 6 of the retro reflector 5 at a certain incident angle, reflected light B and refracted light C are generated on the incident surface 6, the reflected light B is separated from the refracted light C, the refracted light C is subjected to secondary total reflection in the light reflection cavity microstructure and returns to the incident surface 6, reflected light D and refracted light E are generated on the incident surface 6, and the reflected light D is separated from the refracted light E. It can be seen that the refracted light E direction coincides with the incident light a direction and overall produces a certain offset, which can be achieved by the angular relationship between the refracting surfaces 7. In addition, after the incident surface 6 is added with a submicron structure or covered with other antireflection media, reflected light can be weakened, so that the light intensity of refracted light E is enhanced, and the performance of the retro-reflector is improved. Because the retro-reflector reflects the incident light to the outside for the second time to emit the original reflected light, the dark ring formed by the light intensity offset and the original regular distribution is mutually overlapped, and the light intensity distribution on the whole is ensured to be uniform. Figure 8 is the illumination distribution contrast sketch map of this embodiment, can see out, the utility model discloses change original light distribution mode, eliminated and dazzled the light effect, guarantee to shine the regional interior holistic light distribution of portion all.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to make the person skilled in the art understand the contents of the present invention and implement the present invention, so as not to limit the protection scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention are covered in the protection scope of the present invention.
Claims (9)
1. The utility model provides a retro-reflection lighting device, includes reflecting plate, light guide plate, emergent plate, its characterized in that:
the light guide plate comprises a first emergent surface, a first top surface opposite to the first emergent surface and an incident surface which is positioned on the side and used for receiving light beams, the incident surface is positioned at the corner of the light guide plate, the incident surface is provided with an LED light source, the reflecting plate is positioned above the first top surface, a plurality of groups of micro prisms are distributed on the first top surface, the micro prisms are distributed from near to far in a concentric curve surrounding the LED light source, and the micro prisms are provided with a first light facing surface and a first backlight surface;
the emergent plate comprises a second emergent surface and a second top surface opposite to the second emergent surface, the second top surface is positioned below the first emergent surface, a plurality of groups of light distribution convex edge rings are distributed on the second top surface, the light distribution convex edge rings are distributed from near to far in a concentric curve manner, the microprisms fall in the light distribution convex edge rings in the vertical direction, and the light distribution convex edge rings are provided with a second light facing surface and a second backlight surface;
the LED light source comprises an LED chip and a retro-reflector lens positioned in the light-emitting direction of the LED chip, the retro-reflector lens comprises a circular bottom surface, a side surface surrounding the bottom surface and a light-emitting surface extending upwards along the side surface, the center of the bottom surface is recessed upwards to form a light-entering surface, the light-emitting surface covers above the bottom surface, a plurality of retro-reflectors are formed on the bottom surface, the retro-reflectors comprise incident surfaces and a plurality of refraction surfaces surrounding the incident surfaces, the incident surfaces and the refraction surfaces jointly form a polyhedral structure, a light reflection cavity is formed by surrounding the refraction surfaces, the refraction surfaces comprise main refraction surfaces and auxiliary refraction surfaces, the main refraction surfaces are opposite to the incident surfaces, the main refraction surfaces are vertical to each other, and the auxiliary refraction surfaces are adjacent to the incident surfaces, the incident surface is provided with a submicron structure layer or an anti-reflection medium layer, part of light rays incident from the light incident surface are reflected on the light emergent surface and then enter the light reflection cavity through the incident surface, and the light rays are refracted for multiple times through the refraction surface and then are parallel and return to the incident surface and exit out of the incident surface in an outward offset manner.
2. The retro-reflective lighting device of claim 1, wherein: the slope of the concentric curve gradually increases in the clockwise direction.
3. The retro-reflective lighting device of claim 1, wherein: the height of the micro prisms is gradually increased along the direction far away from the incident surface, and the distance between the micro prisms is gradually reduced along the direction far away from the incident surface.
4. The retro-reflective illumination device of claim 1, wherein said first light-facing surface makes an α angle with said first backlight surface, said α angle varies from α 1 to α 2 to α 3 in a direction away from said light-incident surface, and α 3 > α 1 > α 2.
5. The retro-reflective illumination device of claim 1, wherein said second light-facing surface is at an angle of β degrees with respect to said second backlight surface, said angle β degrees varying in a range of β 1- β 2- β 3 along a direction away from said light-incident surface, and β 3 > β 1 > β 2.
6. The retro-reflective lighting device of claim 1, wherein: the included angle between the refraction surfaces is larger than the total reflection angle.
7. The retro-reflective lighting device of claim 1, wherein: the retro-reflectors are distributed in a central symmetry manner and are integrally inclined towards the outside.
8. The retro-reflective lighting device of claim 1, wherein: the inner surface of the light incident surface is provided with a plurality of annular groove lines, and the annular groove lines are distributed along the height direction of the light incident surface.
9. The retro-reflective lighting device of claim 1, wherein: the center of the light emitting surface is downwards sunken towards the light incident surface and is positioned on the same central line with the central point of the light incident surface, the center of the light emitting surface is sunken towards the light incident surface so that incident rays in the area near the central point reach a total reflection condition, and incident rays in the rest areas of the light emitting surface reach a refraction and emergence condition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920444643.3U CN210688102U (en) | 2019-04-03 | 2019-04-03 | Retro-reflection lighting device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920444643.3U CN210688102U (en) | 2019-04-03 | 2019-04-03 | Retro-reflection lighting device |
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| CN210688102U true CN210688102U (en) | 2020-06-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114609719A (en) * | 2022-01-17 | 2022-06-10 | 达运精密工业股份有限公司 | Display module, backlight module and high-gain light guide plate thereof |
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- 2019-04-03 CN CN201920444643.3U patent/CN210688102U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114609719A (en) * | 2022-01-17 | 2022-06-10 | 达运精密工业股份有限公司 | Display module, backlight module and high-gain light guide plate thereof |
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