CN103090311B - Lens, light-emitting diode (LED) backlight module and display device - Google Patents
Lens, light-emitting diode (LED) backlight module and display device Download PDFInfo
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- CN103090311B CN103090311B CN201310021469.9A CN201310021469A CN103090311B CN 103090311 B CN103090311 B CN 103090311B CN 201310021469 A CN201310021469 A CN 201310021469A CN 103090311 B CN103090311 B CN 103090311B
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Abstract
The invention provides a lens, a light-emitting diode backlight module and a display device, and is applied in the technical field of optics. The lens receives light rays radiated from a light source through a light-in surface, when the light rays radiated from the light source enter into the lens, a part of the light rays directly reflects out from a certain light-out surface, the other part of the light rays reflect to other light-out surfaces or bottom surfaces through a certain light-out surface, then reflect to other light-out surfaces through other light-out surfaces or bottom surfaces, and at last reflect out from the other light-out surface. Accordingly, the light rays radiated from the light source are scattered in the lens and are enabled to reflect out from different light-out surfaces, and thus light-out areas are enlarged and uniformity is good. Therefore, the lens is suitable for various LED backlight module and display devices.
Description
Technical field
The invention belongs to optical technical field, particularly relate to a kind of lens, LED-backlit module and display unit.
Background technology
Light emitting diode (LED) luminescence has single direction, light intensity distributions narrow scope, and lens need be adopted to carry out luminous intensity distribution.But LED to send light long-pending less after existing lens outgoing, and even not, application requirement cannot be met.For this reason, need light emitting diode (LED) the set arrangement using number more, to reach on ㄧ same level, diverse location point has identical and uniform light intensity distributions, so will cause the cost of great number and the backlight module system of heaviness.
Summary of the invention
The object of the embodiment of the present invention is to provide a kind of lens, and being intended to solve LED, to send light long-pending less after existing lens outgoing, and uniform not problem.
The embodiment of the present invention is achieved in that a kind of lens, has:
One bottom surface;
One in order to receive the incidence surface that light source emits beam;
One is used as the first convex surface of the first exiting surface;
One is used as the first annular chamfer of the second exiting surface;
One is used as the second convex surface of the 3rd exiting surface;
Wherein, described first exiting surface, the second exiting surface are sequentially connected from top to bottom, from the inside to the outside with the 3rd exiting surface; Second exiting surface connects with the 3rd exiting surface formation first stage; Described incidence surface is inner concave arc surface, and tangent line and its rotating shaft of this inner concave arc surface bus intersect the first angle; Described first exiting surface is umbilicate convex surface, and tangent line and its rotating shaft of this convex surface bus intersect the second angle; Described second exiting surface and bottom surface intersect the 3rd angle; Described 3rd exiting surface is convex outward, and the tangent line of this convex outward bus and its rotating shaft intersect the 4th angle.
Another object of the embodiment of the present invention is to provide a kind of LED-backlit module, comprises multiple LED, and described backlight module adopts said lens, and each LED coordinates with described lens.
Another object of the embodiment of the present invention is to provide a kind of display unit, and described display unit adopts said lens.
The light that the embodiment of the present invention is sent by incidence surface reception light source, after the light that light source sends enters lens, wherein some light directly goes out from a certain exiting surface refraction, another part light first reflexes to other exiting surface or bottom surface through a certain exiting surface, by other exiting surface or bottom reflection to other exiting surface, finally go out from the refraction of other exiting surface, the light that light source sends is broken up by such elder generation in lens, each light is made to go out from the different exiting surface refraction of lens again, with this enlarging lighting area, and uniformity is good.Therefore, these lens are applicable to various LED-backlit module and display unit especially.
Accompanying drawing explanation
Fig. 1 is the perspective view of the lens that the embodiment of the present invention provides;
Fig. 2 is the top view of the lens that the embodiment of the present invention provides;
Fig. 3 is the upward view of the lens that the embodiment of the present invention provides;
Fig. 4 is the sectional view (in figure, each line segment is respectively the bus of respective surfaces) of the lens that the embodiment of the present invention provides;
Fig. 5 is the index path with the lens of two stages that the embodiment of the present invention provides;
Fig. 6 is the structural representation with the lens of three stages that the embodiment of the present invention provides.
Detailed description of the invention
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
The light that the embodiment of the present invention is sent by incidence surface reception light source, after the light that light source sends enters lens, wherein some light directly goes out from a certain exiting surface refraction, another part light first reflexes to other exiting surface or bottom surface through a certain exiting surface, by other exiting surface or bottom reflection to other exiting surface, finally go out from the refraction of other exiting surface, the light that light source sends is broken up by such elder generation in lens, each light is made to go out from the different exiting surface refraction of lens again, with this enlarging lighting area, and uniformity is good.
Be that light source is described in detail realization of the present invention below with LED.
As shown in Fig. 1 ~ 5, the lens that the embodiment of the present invention provides have a bottom surface 10, is used as the 3rd exiting surface 3 the second convex surface in order to the first annular chamfer and that the first convex surface, that the incidence surface 9, receiving light source 8 and emit beam is used as the first exiting surface 1 is used as the second exiting surface 2, and wherein said first exiting surface 1, second exiting surface 2 is sequentially connected from top to bottom, from the inside to the outside with the 3rd exiting surface 3; Second exiting surface 2 connects with the 3rd exiting surface 3 formation first stage; Described incidence surface 9 is inner concave arc surface, and tangent line and its rotating shaft OP of this inner concave arc surface bus intersect the first angle; Described first exiting surface 1 is umbilicate convex surface, and tangent line and its rotating shaft OP of this convex surface bus intersect the second angle; Described second exiting surface 2 intersects the 3rd angle with bottom surface 10; Described 3rd exiting surface 3 is convex outward, and tangent line and its rotating shaft OP of this convex outward bus intersect the 4th angle.The light that LED light source sends is received herein by described incidence surface 9, after described LED light source 8 emits beam and enters lens, wherein some light is (as light P1, P3) directly go out from a certain exiting surface refraction, another part light first reflexes to other exiting surface or bottom surface through a certain exiting surface, by other exiting surface (as light P5) or bottom surface (as light P2, P4) other exiting surface is reflexed to, finally go out from the refraction of other exiting surface, the light that light source 8 sends is broken up by such elder generation in lens, each light is made to go out from the different exiting surface refraction of lens again, with this enlarging lighting area, and uniformity is good.
Usually, described first angle (i.e. the described tangent line of inner concave arc surface bus and the angle of its rotating shaft) reduces from top to bottom.Particularly, the amplitude that reduces is fixed with LED light source uniformity or light source directivity, that is the design of the angle of the tangent line of inner concave arc surface bus and its rotating shaft need consider the parameters such as below LED light source exiting surface angle and height.Generally speaking, LED light source exiting surface angle is larger or uniformity is better, the tangent line of inner concave arc surface bus and the angle of its rotating shaft less.
Described second angle (i.e. the described tangent line of the first convex surface bus and the angle of its rotating shaft) first increases and then decreases from the inside to the outside in the embodiment of the present invention.Particularly, described first convex surface 1 intermediate recess, Depression Centers is a singular point (being equivalent to catastrophe point), the tangent line of this convex surface bus and the angle of its rotating shaft OP progressively reduce along outward direction after central point 90 ° of elder generations sharply increase from the inside to the outside, and it increases with reducing amplitude and light source uniformity and light source, and to launch size relevant.
Aforementioned second exiting surface 2 is less than 45 ° with the angle of bottom surface 10, incident ray can be made like this refraction more easily to occur and more disperse, and depart from rotating shaft, disperse reflection ray by this, avoids light to concentrate, causes central bright spot, thus reach the object of homogenising light.In addition, described 4th angle (the described tangent line of the 3rd exiting surface bus and the angle of its rotating shaft) increases from top to bottom, and evenly launch light by this, its best angle need depending on LED exiting surface size or angle.
Lens described in the embodiment of the present invention also have the 3rd convex surface or the round table surface that second annular chamfer and being used as the 4th exiting surface 4 is used as the 5th exiting surface 5.Wherein, described 4th exiting surface 4 connects with the 3rd exiting surface 3, and the 4th exiting surface 4 connects with the 5th exiting surface 5 the second stage formed in order to diffusing light; Described 4th exiting surface 4 and the angle of bottom surface 10 are less than the angle of the second exiting surface 2 and bottom surface 10; When described 5th exiting surface 5 is convex outward, the tangent line of this convex outward bus and the angle of its rotating shaft increase from top to bottom.5th exiting surface 5 described herein can also be round table surface, is beneficial to lens shaping.
As shown in Figure 6, long-pending larger for making described light source 8 emit beam after the outgoing of these lens, uniformity is better, establishes to be connected the 3rd stage formed by the 3rd annular chamfer and the 4th convex surface in described lens profile.Wherein said 3rd annular chamfer is used as the 6th exiting surface 6, and described 4th convex surface is used as the 7th exiting surface 7, and described 6th exiting surface 6 connects with the 5th exiting surface 5, and described 6th exiting surface 6 and the angle of bottom surface 10 are less than the angle of the 4th exiting surface 4 and bottom surface 10; When described 7th exiting surface 7 is convex outward, the tangent line of this convex outward bus and the angle of its rotating shaft increase from top to bottom.Light in such lens will disperse more, increase accordingly lighting area, and uniformity strengthens.Certainly, the 7th exiting surface 7 described herein can also be round table surface, is beneficial to lens shaping.
Bottom surface 10 described in the embodiment of the present invention is for having the plane of three-dimensional structure, described three-dimensional structure is specially pyramid, circular cone, Part-spherical, cylinder or prism circle/groove, thus strengthen further light break up effect in lens, promote the uniformity of bright dipping further.If when said light source is LED, can be made into LED-backlit module by multiple LED and the lens that mate with each LED.
This lens material can be made up of following transparent material, as glass, pottery, or polymerizable material, as polytetrafluoroethylene (PTFE) (polytetrafluoroethylene, PTFE), methyl methacrylate (PMMA), PEMA, Merlon, silicone and other polymeric blends, technique can injection moulding or pressing mold be shaped, and is beneficial to these lens so shaping.Wherein, described incidence surface 9 indent, its symmetry axis is lens axis.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. lens, is characterized in that, described lens have:
One bottom surface;
One in order to receive the incidence surface that light source emits beam;
One is used as the first convex surface of the first exiting surface;
One is used as the first annular chamfer of the second exiting surface;
One is used as the second convex surface of the 3rd exiting surface;
Wherein, described first exiting surface, the second exiting surface are sequentially connected from top to bottom, from the inside to the outside with the 3rd exiting surface; Second exiting surface connects with the 3rd exiting surface formation first stage; Described incidence surface is inner concave arc surface, and tangent line and its rotating shaft of this inner concave arc surface bus intersect the first angle; Described first exiting surface is umbilicate convex surface, and tangent line and its rotating shaft of this convex surface bus intersect the second angle; Described second exiting surface and bottom surface intersect the 3rd angle; Described 3rd exiting surface is convex outward, and the tangent line of this convex outward bus and its rotating shaft intersect the 4th angle;
Described first angle reduces from top to bottom, described second angle first increases and then decreases from the inside to the outside, and described 3rd angle is less than 45 °, and described 4th angle increases from top to bottom.
2. lens as claimed in claim 1, it is characterized in that, described lens also have:
One is used as the second annular chamfer of the 4th exiting surface;
One is used as the 3rd convex surface or round table surface of the 5th exiting surface;
Wherein, described 4th exiting surface connects with the 3rd exiting surface, and the 4th exiting surface connects with the 5th exiting surface formation second stage; The angle of described 4th exiting surface and bottom surface is less than the angle of the second exiting surface and bottom surface; When described 5th exiting surface is convex outward, the tangent line of this convex outward bus and the angle of its rotating shaft increase from top to bottom.
3. lens as claimed in claim 2, it is characterized in that, described lens have further:
One is used as the 3rd annular chamfer of the 6th exiting surface;
One is used as the 4th convex surface or round table surface of the 7th exiting surface;
Wherein, described 6th exiting surface connects with the 5th exiting surface, and the 6th exiting surface connects with the 7th exiting surface formation the 3rd stage; The angle of described 6th exiting surface and bottom surface is less than the angle of the 4th exiting surface and bottom surface; When described 7th exiting surface is convex outward, the tangent line of this convex outward bus and the angle of its rotating shaft increase from top to bottom.
4. the lens as described in claim 1,2 or 3, is characterized in that, described bottom surface is the plane with three-dimensional structure, and described three-dimensional structure is pyramid, circular cone, Part-spherical, cylinder or prism circle/groove.
5. a LED-backlit module, comprises multiple LED, it is characterized in that, described backlight module adopts the lens according to any one of Claims 1 to 4, and each LED coordinates with described lens.
6. a display unit, is characterized in that, described display unit adopts lens as claimed in claim 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310021469.9A CN103090311B (en) | 2013-01-21 | 2013-01-21 | Lens, light-emitting diode (LED) backlight module and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310021469.9A CN103090311B (en) | 2013-01-21 | 2013-01-21 | Lens, light-emitting diode (LED) backlight module and display device |
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| Publication Number | Publication Date |
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| CN103090311A CN103090311A (en) | 2013-05-08 |
| CN103090311B true CN103090311B (en) | 2015-02-18 |
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| CN201310021469.9A Active CN103090311B (en) | 2013-01-21 | 2013-01-21 | Lens, light-emitting diode (LED) backlight module and display device |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102108204B1 (en) * | 2013-08-26 | 2020-05-08 | 서울반도체 주식회사 | Lens and light emitting module for surface illumination |
| 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 |
| TW201518656A (en) * | 2013-11-14 | 2015-05-16 | Ind Tech Res Inst | Light-emitting device package |
| CN103994396B (en) * | 2014-05-14 | 2017-07-11 | 郑睿韬 | A kind of bis- refraction-reflection lens of LED for downward back radiant |
| CN104501090B (en) * | 2014-12-15 | 2017-09-29 | 欧普照明股份有限公司 | A kind of lens |
| CN106291896B (en) | 2015-06-05 | 2019-12-20 | 瑞仪光电(苏州)有限公司 | Optical lens and backlight module |
| CN105135922A (en) * | 2015-08-28 | 2015-12-09 | 中山市绿涛电子科技有限公司 | Radiator |
| JP2017083692A (en) * | 2015-10-29 | 2017-05-18 | 船井電機株式会社 | Diffusion lens and display device |
| WO2021072822A1 (en) * | 2019-10-18 | 2021-04-22 | 南昌欧菲生物识别技术有限公司 | Lens and optical system |
| CN111810874B (en) * | 2020-07-31 | 2022-11-25 | 特能热交换科技（中山）有限公司 | Outdoor projection lamp |
| CN113446530A (en) * | 2021-07-12 | 2021-09-28 | 深圳市中孚能电气设备有限公司 | Lamp holder and miner's lamp |
| CN115264414B (en) * | 2022-05-31 | 2023-08-04 | 大连工业大学 | Combined compact LED lens |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4993434B2 (en) * | 2005-11-18 | 2012-08-08 | スタンレー電気株式会社 | White LED lighting device |
| CN101995592B (en) * | 2009-08-11 | 2012-08-08 | 财团法人工业技术研究院 | Total reflection optical device |
| CN102818216B (en) * | 2012-06-05 | 2014-08-06 | 佛山市国星光电股份有限公司 | Large-angle lens and large-angle light-emergent LED (Light Emitting Diode) light source module |
| CN202660408U (en) * | 2012-07-19 | 2013-01-09 | 陈旺松 | Single light-emitting diode (LED) secondary optical lens lamp |
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Inventor after: You Junping Inventor after: Ruan Shichen Inventor after: Shen Sikuan Inventor before: Shen Sikuan Inventor before: Ruan Shichen |
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Address after: 2306, east block, Skyworth semiconductor design building, 18 Gaoxin South 4th Road, high tech Zone community, Yuehai street, Nanshan District, Shenzhen, Guangdong 518000 Patentee after: Shenzhen Kukai Network Technology Co.,Ltd. Address before: Room 803, block a, Skyworth building, Gaoxin South 1st Road, Nanshan District, Shenzhen, Guangdong 518000 Patentee before: Shenzhen Coocaa Network Technology Co.,Ltd. |