CN113985651A - Uniform light lens and backlight module - Google Patents
Uniform light lens and backlight module Download PDFInfo
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- CN113985651A CN113985651A CN202111214895.5A CN202111214895A CN113985651A CN 113985651 A CN113985651 A CN 113985651A CN 202111214895 A CN202111214895 A CN 202111214895A CN 113985651 A CN113985651 A CN 113985651A
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- 238000007493 shaping process Methods 0.000 description 3
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
- G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133603—Direct backlight with LEDs
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133611—Direct backlight including means for improving the brightness uniformity
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention discloses a uniform light lens and a backlight module, wherein the uniform light lens comprises: the lens comprises a lens body, a light incoming surface and a light outgoing structure, wherein the light incoming surface is arranged on the bottom surface of the lens body; the light emitting structure is arranged on the top surface and the side surface of the lens body. After light enters the lens body from the light inlet face, the light can be deflected through the light outlet structures arranged on the top face and the side faces of the lens body, so that the light is scattered and emitted, the angle distribution and the space distribution of the emergent light are controlled, and the emergent light is uniform.
Description
Technical Field
The invention relates to the technical field of optical elements, in particular to a uniform light lens and a backlight module.
Background
In the field of liquid crystal TV display, LED lamps are widely applied. As a new generation light source, the LED has the advantages of small volume, long service life, good color rendering property, low power consumption and high luminous efficiency, and has a greater application prospect in the fields of large-area flat panel display and portable display. However, the light emitted from the LED light source has a certain angular distribution and a certain spatial distribution, and therefore, in all practical applications at present, a corresponding optical light distribution element, such as a lens, needs to be disposed.
However, the conventional lens can control only the angular distribution or the spatial distribution of the emitted light, and cannot achieve both of them, which results in a poor light uniformizing effect.
Thus, there is a need for improvements and enhancements in the art.
Disclosure of Invention
The present invention provides a uniform light lens and a backlight module, aiming at solving the problem that the lens in the prior art can only control the angle distribution or the spatial distribution of the emergent light, and cannot realize both, thereby resulting in poor light-equalizing effect.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
in a first aspect, the present invention provides a uniform light lens, wherein the uniform light lens includes:
a lens body;
a light incident surface disposed on a bottom surface of the lens body;
the light emitting structure is arranged on the top surface and the side surface of the lens body.
In one implementation, the light exit structure includes: the lens comprises a lens body, a first light-emitting structure and a second light-emitting structure, wherein the first light-emitting structure is arranged on the top surface of the lens body, and the second light-emitting structure is arranged on the side surface of the lens body.
In one implementation manner, the first light emitting structures are provided in plurality and have the same height.
In one implementation, the first light exit structure is provided with a first inclined plane, and an angle between the first inclined plane and the top surface of the lens body is greater than 90 °.
In one implementation manner, a plurality of second light emitting structures are arranged and symmetrically arranged on the left side surface of the lens body and the right side surface of the lens body; the size of the second light-emitting structure is decreased gradually along with the increase of the set height.
In one implementation, the second light exit structure is provided with a second inclined plane, and an angle between the second inclined plane and the side surface of the lens body is greater than 90 °.
In one implementation manner, a concave structure is disposed at a central position of the top surface of the lens body, and the first light emitting structures are symmetrically disposed relative to the concave structure.
In one implementation, the concave structure is a circular arc concave surface or a triangular concave surface; the highest point of the concave surface structure is connected with the lowest point of the first light-emitting structure.
In one implementation, the light incident surface is a dome surface, the dome surface is concave toward the inner side of the lens body, and an LED light source is arranged below the dome surface.
In a second aspect, an embodiment of the present invention further provides a backlight module, where the backlight module includes the uniform light lens according to any one of the above aspects.
Has the advantages that: compared with the prior art, the invention provides a uniform light lens, which comprises: lens body, income plain noodles and light-emitting structure. The light incident surface is arranged on the bottom surface of the lens body; the light emitting structure is arranged on the top surface and the side surface of the lens body. Because the top surface and the side surface of the lens body are both provided with the light emitting structures, after light enters the lens body from the light inlet surface, the light can be deflected through the light emitting structures arranged on the top surface and the side surface of the lens body, so that the light is scattered and emitted, the angle distribution and the space distribution of the emergent light are controlled, and the light is uniform.
Drawings
Fig. 1 is a schematic structural diagram of a uniform light lens according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a light exit path of the uniform light lens according to the embodiment of the invention.
Fig. 3 is a schematic structural diagram of a backlight module according to an embodiment of the invention.
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Detailed Description
In order to make the objects, technical solutions and effects of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the liquid crystal display, the transmittance of the liquid crystal panel for the incident light with a large angle is not high, and the divergence angle of the backlight source needs to be controlled to improve the energy utilization rate. For this reason, a lens is required to achieve the light uniformizing effect. However, the conventional lens has only one free-form surface, and can only control the angular distribution or the spatial distribution of the emitted light, and cannot achieve both of them, which results in a poor light uniformizing effect.
In order to solve the above problem, the present embodiment provides a uniform light lens, as shown in fig. 1 in particular. The uniform light lens includes: the lens comprises a lens body 10, a light incident surface 20 and a light emergent structure 30. The light incident surface 20 is disposed on the bottom surface 101 of the lens body 10; the light-emitting structure 30 is disposed on the top surface 102 and the side surface 103 of the lens body 10. Because the light emitting structures 30 are disposed on the top surface 102 and the side surface 103 of the lens body 10, after light enters the lens body 10 from the light incident surface 20, the light will be deflected by the light emitting structures 30 disposed on the top surface 102 and the side surface 103 of the lens body 10, so that the light is scattered and emitted, the angle distribution and the spatial distribution of the emitted light are controlled, and the light is emitted uniformly.
The lens body 10 of the present embodiment is injection molded from an optical grade transparent PMMA material. In this embodiment, the light emitting structures 30 are provided with two types, including a first light emitting structure 310 and a second light emitting structure 320, the first light emitting structure 310 is disposed on the top surface 102 of the lens body 10, and the second light emitting structure 320 is disposed on the side surface 103 of the lens body 10. As shown in fig. 1, the lens body 10 has a left side surface and a right side surface, and therefore, the second light exiting structure 320 is disposed on both the left side surface and the right side surface of the lens body 10 in the present embodiment.
In one implementation, the first light exiting structures 310 in the present embodiment are provided in a plurality and are uniformly arranged on the top surface 102 of the lens body 10. In addition, in order to facilitate installation and installation of the uniform light lens when the uniform light lens is applied to the backlight module, in the embodiment, the first light exit structures 310 are set to have the same height, that is, the highest points of all the first light exit structures 310 are located on the same horizontal line. Specifically, the first light exit structure 310 of the present embodiment can be configured like a rectangular parallelepiped, so that the first light exit structure 310 has a plurality of side surfaces thereon. The uniform light lens of this embodiment is used to achieve a uniform light effect, and light can be emitted in different directions, so that in this embodiment, the side surfaces of the first light emitting structure 310 need to be adjusted, so that the angle between one or some side surfaces of the first light emitting structure 310 and the top surface 102 of the lens body 10 is different, that is, the side surfaces are arranged in an inclined shape, so that the side surfaces can deflect light at different angles, and light can be emitted at different emission angles.
Therefore, in one implementation, as shown in fig. 1, the present embodiment provides some side surfaces of the first light exit structure 310 with an inclined shape, that is, the first inclined surface 311. Since the first light exiting structures 310 are provided in plural numbers, the inclination angle of the first inclined surface 311 of each first light exiting structure 310 may be set to be the same or different. No matter whether the inclination angles of the first inclined surfaces 311 are the same or not, since the positions of the first light exit structures 310 are different, light can be emitted from different angles, and uniform light exit is realized. In this embodiment, the inclination angles of the first inclined surfaces 311 of the first light exit structures 310 are set to be different, so that the shapes of the first light exit structures 310 are different. However, in order to better realize light emission and better reflect light, so that the emitted light is emitted, in this embodiment, when the first inclined plane 311 of the first light emitting structure 310 is disposed, it is ensured that the angle between the first inclined plane 311 and the top surface 102 of the lens body 10 is greater than 90 °, as shown in fig. 2, the arrow direction in fig. 2 represents the light emitting path direction, so that the light can be emitted through reflection of the first inclined plane 311, so that the light is emitted in different directions, and the emitted light can be emitted in a certain angle.
In this embodiment, a concave structure 104 is disposed at a central position of the top surface 102 of the lens body 10, and the first light exiting structures 310 are symmetrically disposed with respect to the concave structure 104. In order to uniformly split the light, most of the energy of the lambertian LED light source 40 is concentrated in the LED, and the light emitting angle is within a small angle range, in order to ensure energy dispersion and make the light emitting uniform, the concave structure 104 is disposed on the top surface 102 of the lens body 10. In an implementation manner, the concave structure 104 is configured to be a circular arc or a triangle, and the configuration may be set according to specific requirements, which is not limited in this embodiment. The concave structure 104 of this embodiment is triangular, that is, a triangular groove is formed on the top surface 102 of the lens body 10 to form the concave structure 104. In addition, in the present embodiment, the highest point of the concave structure 104 is connected to the lowest point of the first light exiting structure 310. As can be seen from fig. 1, the first light exiting structure 310 is connected to the concave structure 104, and since the lowest point of the first light exiting structure 310 is on the top surface 102 of the lens body 10, and the concave structure 104 is recessed from the top surface 102 of the lens body 10 to the inner side of the lens body 10, the highest point of the concave structure 104 is on the top surface 102, and therefore, the concave structure 104 is recessed from the lowest point of the first light exiting structure 310 to the inner side of the lens body 10.
In an implementation manner, the first light emitting structure 310 in this embodiment is based on the concave structure 104 is symmetrically disposed, so that the left and right sides of the concave structure 104 are both provided with the first light emitting structure 310, because the first light emitting structure 310 is provided with the first inclined plane 311, and the inclined angles of the first inclined plane 311 are different, the symmetry is disposed after the first light emitting structure 310, light can be reflected by the first inclined plane 311 on the first light emitting structure 310 through the left and right sides of the concave structure 104, so that the light is more uniform, and a better light emitting effect is achieved.
In one implementation manner, the second light exiting structures 320 of the present embodiment are also provided in plural, and since the second light exiting structures 320 are disposed on the side surface 103 of the lens body 10, the second light exiting structures 320 are disposed in the vertical direction. In the present embodiment, the size of the second light extraction structure 320 decreases with increasing height. Specifically, as shown in fig. 1, as the position of the second light exit structure 320 rises, the length of the second light exit structure 320 extending outward decreases, and as the position of the second light exit structure 320 falls, the length of the second light exit structure 320 extending outward increases. That is to say, the higher the second light-emitting structure 320 is, the smaller the size of the second light-emitting structure 320 is, so that it can be ensured that the second light-emitting structure 320 located above does not shield the second light-emitting structure 320 located below, and therefore, the reflection effect of the second light-emitting result located below on light rays is not affected, and the light-emitting effect is ensured.
In one implementation, the second light emitting structure 320 in the present embodiment may be disposed in a shape of a triangular prism, so that the second light emitting structure 320 is provided with the second slope 312. Since the second light emitting structures 320 are provided in plural, the inclination angle of the second inclined surface 312 of each second light emitting structure 320 may be set to be the same or different. No matter whether the inclination angles of the second inclined surfaces 312 are the same or not, since the positions of the second light exit structures 320 are different, light can be emitted from different angles, and uniform light exit is realized. In this embodiment, the inclination angles of the second inclined surfaces 312 of the second light exit structures 320 are different, so that the shapes of the second light exit structures 320 are different. In order to deflect the light so that it is emitted in all directions, the present embodiment provides an angle between the second inclined surface 312 and the side surface of the lens body 10 that is greater than 90 °, as shown in particular in fig. 1 and 2. After light enters the lens body 10, the light is reflected by the second inclined surface 312 of the second light emitting structure 320 disposed on the side surface of the lens body 10, and since angles of the second inclined surface 312 are different, the emitted light is emitted in all directions, so that the light is more uniform.
In one implementation, the light incident surface 20 in the present embodiment is configured as a dome surface, which is concave toward the inner side of the lens body 10 as shown in fig. 1, that is, the present embodiment is formed by digging a dome shape on the bottom surface 101 of the lens body 10, thereby forming the dome surface. The LED light source 40 is arranged below the circular arc surface, and the light incident surface 20 is set to be the circular arc surface in the embodiment, so that the area of the light incident surface 20 is increased, and more light can enter the lens body 10.
It can be seen that in the present embodiment, the first light exit structure 310 is disposed on the top surface 102 of the lens body 10, and the second light exit structure 320 is disposed on the side surface 103 of the lens body 10. Set up first inclined plane 311 on the first light-emitting structure 310, set up second inclined plane 312 on the second light-emitting structure 320, consequently after light gets into lens body 10 from income plain noodles 20, will pass through first inclined plane 311 takes place to deflect with the effect of second inclined plane 312 to make the light dispersion to penetrate, not only changed the exit angle of emergent light, still make the emergent light to penetrate around lens body 10, realize all controlling the angular distribution and the spatial distribution of emergent light, make the emergent light even.
Based on the above embodiments, the present embodiment provides a backlight module, as shown in fig. 3, in the backlight module of the present embodiment, a plurality of uniform light lenses are disposed, and the uniform light lenses are uniformly arranged, and an LED light source 40 is correspondingly disposed below each uniform light lens. Specifically, the backlight module in the present embodiment includes a back plate 50, a reflective sheet 60, and an optical film 70 disposed on the first optical structure of the uniform light lens. Since the backlight module in this embodiment is provided with the uniform light lens, the first light emitting structure 310 is disposed on the top surface 102 of the lens body 10 of the uniform light lens, and the second light emitting structure 320 is disposed on the side surface 103 of the lens body 10. Set up first inclined plane 311 on the first light-emitting structure 310, set up second inclined plane 312 on the second light-emitting structure 320, consequently after light gets into lens body 10 from income plain noodles 20, will pass through first inclined plane 311 takes place to deflect with the effect of second inclined plane 312 to make the light dispersion to penetrate, not only changed the exit angle of emergent light, still make the emergent light to penetrate around lens body 10, realize all controlling the angular distribution and the spatial distribution of emergent light, make the emergent light even. The angle of the light source is controlled, so that the light source can be transmitted towards the similar direction on the light emitting surface. The light source shaping device can be used for shaping the radiation light of light sources such as LEDs and the like, can obtain the required energy spatial distribution on a detection surface, and can completely control the angular distribution of light beam energy at the same time, so that the illumination effect can be maintained within a considerable distance behind the uniform light lens and the array thereof, and the light source shaping device can be used in the fields of special illumination, backlight of liquid crystal display and the like.
In summary, the present invention discloses a uniform light lens and a backlight module, the uniform light lens includes: the lens comprises a lens body, a light incoming surface and a light outgoing structure, wherein the light incoming surface is arranged on the bottom surface of the lens body; the light emitting structure is arranged on the top surface and the side surface of the lens body. After light enters the lens body from the light inlet face, the light can be deflected through the light outlet structures arranged on the top face and the side faces of the lens body, so that the light is scattered and emitted, the angle distribution and the space distribution of the emergent light are controlled, and the emergent light is uniform.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A uniform light lens, comprising:
a lens body;
a light incident surface disposed on a bottom surface of the lens body;
the light emitting structure is arranged on the top surface and the side surface of the lens body.
2. A uniform light lens as recited in claim 1, wherein the light exit structure comprises: the lens comprises a lens body, a first light-emitting structure and a second light-emitting structure, wherein the first light-emitting structure is arranged on the top surface of the lens body, and the second light-emitting structure is arranged on the side surface of the lens body.
3. The lens of claim 2, wherein the first light extraction structures are disposed in a plurality and have the same height.
4. The uniform light lens according to claim 3, wherein the first light exit structure is provided with a first inclined surface, and an angle between the first inclined surface and the top surface of the lens body is greater than 90 °.
5. The lens of claim 2, wherein the second light exit structures are disposed in plural and symmetrically on a left side surface of the lens body and a right side surface of the lens body; the size of the second light-emitting structure is decreased gradually along with the increase of the set height.
6. A uniform light lens according to claim 5, wherein the second light exit structure is provided with a second inclined surface, and an angle between the second inclined surface and the side surface of the lens body is greater than 90 °.
7. The uniform light lens according to claim 3, wherein a concave structure is disposed at a central position of the top surface of the lens body, and the first light exit structure is symmetrically disposed with respect to the concave structure.
8. The uniform light lens according to claim 7, wherein the concave structure is a circular arc concave surface or a triangular concave surface; the highest point of the concave surface structure is connected with the lowest point of the first light-emitting structure.
9. The uniform light lens of claim 1, wherein the light incident surface is configured as a dome surface, the dome surface is concave toward the inner side of the lens body, and an LED light source is disposed below the dome surface.
10. A backlight module, characterized in that the backlight module comprises the uniform light lens according to any one of claims 1-9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111214895.5A CN113985651A (en) | 2021-10-19 | 2021-10-19 | Uniform light lens and backlight module |
| PCT/CN2021/141043 WO2023065527A1 (en) | 2021-10-19 | 2021-12-24 | Light uniformizing lens and backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111214895.5A CN113985651A (en) | 2021-10-19 | 2021-10-19 | Uniform light lens and backlight module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113985651A true CN113985651A (en) | 2022-01-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111214895.5A Pending CN113985651A (en) | 2021-10-19 | 2021-10-19 | Uniform light lens and backlight module |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN113985651A (en) |
| WO (1) | WO2023065527A1 (en) |
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| CN206741161U (en) * | 2017-05-22 | 2017-12-12 | 东莞市欧科光电科技有限公司 | A kind of LCDs LED lens |
| CN206739209U (en) * | 2017-05-22 | 2017-12-12 | 东莞市欧科光电科技有限公司 | A kind of reflecting LED lens |
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2021
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- 2021-12-24 WO PCT/CN2021/141043 patent/WO2023065527A1/en unknown
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| US20050190564A1 (en) * | 2004-02-26 | 2005-09-01 | Koito Manufacturing Co., Ltd. | Vehicular lamp |
| KR101235345B1 (en) * | 2012-03-14 | 2013-02-20 | (주)애니캐스팅 | Lens for light emitting diode, back light unit and display device including the same |
| CN104456416A (en) * | 2013-09-23 | 2015-03-25 | 鸿富锦精密工业（深圳）有限公司 | Lens and light source module with same |
| CN104566209A (en) * | 2013-10-25 | 2015-04-29 | 鸿富锦精密工业（深圳）有限公司 | Lens combination and light source device using lens combination |
| CN104566216A (en) * | 2014-12-31 | 2015-04-29 | 华侨大学 | Asymmetric LED street lamp lens |
| CN112180638A (en) * | 2020-09-14 | 2021-01-05 | 东莞市谷麦光学科技有限公司 | Optical lens with microstructure and application thereof |
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|---|---|
| WO2023065527A1 (en) | 2023-04-27 |
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