CN202581120U - Light emitting diode (LED) rectangular light spot lens - Google Patents
Light emitting diode (LED) rectangular light spot lens Download PDFInfo
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- CN202581120U CN202581120U CN 201220108475 CN201220108475U CN202581120U CN 202581120 U CN202581120 U CN 202581120U CN 201220108475 CN201220108475 CN 201220108475 CN 201220108475 U CN201220108475 U CN 201220108475U CN 202581120 U CN202581120 U CN 202581120U
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Abstract
The utility model discloses a light emitting diode (LED) rectangular light spot lens, which comprises a bottom surface, wherein a light incidence surface which receives LED light is arranged in the center of the bottom surface; the outer surface of the lens, which is communicated with the bottom surface, is a light emergence surface; the light incidence surface comprises a plurality of spherical surfaces or a plurality of first free curved surfaces which adjust the refraction direction of incident light at different angles according to multi-curvature; and the light emergence surface comprises a plurality of second free curved surfaces which set output light spots to be substantially rectangular according to different surface curvatures. The LED rectangular light spot lens has the advantages that the light incidence surface of the conventional LED lens is changed, and the refraction direction of the incident light is controlled according to different curvatures of different positions on the light incidence surface, so the probability of total reflection is reduced, and light emergence efficiency is improved; and furthermore, by arranging a plurality of second free curved surfaces on the light emergence surface, the output light spots are substantially rectangular, and the illumination uniformity of each point in the light spots is high.
Description
Technical field
The utility model relates to a kind of LED lens of realizing light control, especially a kind of LED rectangular light spot lens.
Background technology
LED is a kind of novel electroluminescent device, is described as the green illumination light source of a new generation, compares with conventional light source; Has higher luminous efficiency, better colour rendering, lower energy consumption; Longer advantages such as service life; And in a lot of fields, all obtained using widely, be the main direction in lighting source market, have huge market potential.
The LED emergent light of present most of packaging technology all is a circular light spot heterogeneous; Such hot spot can't satisfy the demand in the illumination application field of the even rectangular light spots of needs such as road lighting, tunnel illumination, backlight, projecting apparatus, automobile headlamp certainly; Therefore, LED being carried out the secondary optics design is necessary.
Application number is 200920307020.8; Patent name discloses a kind of rectangular light spot formation device of LED street lamp for the Chinese utility model patent document of " rectangular light spot of LED street lamp forms device "; With reference to Fig. 1, this device is used to comprise the LED street lamp of at least one led chip 1 ', sets gradually leaded light seat 2 ' in the place ahead of led chip and goes out light microscopic 3 '; Said leaded light seat 2 ' with go out light microscopic 3 ' and fuse; Go out light microscopic 3 ' and be microscler ellipticity, its end face is parabolic, and left and right sides end face is a non-spherical lens.The light that the LED lamp sends is when going out light microscopic 3 ' outgoing, and the light of the parabolic outgoing through going out light microscopic reflects by miter angle, and the light of the aspheric surface outgoing through going out the light microscopic two ends reflects by 120 degree angles, is going out the hot spot that light microscopic 3 ' front end forms rectangle like this.
The typical implementation that also comprises the similar generation rectangular light spot that is described below:
With reference to Fig. 2, a kind of LED secondary optical lens, said lens have a bottom surface 105, and bottom surface 105 is the plane; There is a concave surface (not shown) in lens bottom surface 105 central authorities, are the plane of light incidence of lens; The beam projecting face 106 of lens passes through with the bottom surface mutually, defines the profile of bottom surface; Beam projecting face 106 is spliced to form by two free form surfaces 101 at least; The main part of lens is by bottom surface 105, plane of light incidence, the beam projecting face 106 common definition spaces that surround of lens; Lens also comprise installation foot or the flat board 103 that is arranged on the bottom surface, and the connection transition face 102 of said two free form surfaces 101 is plane or curved surface.
Above-mentioned two kinds of secondary optical lens, the rectangular light spot of its formation are cost to sacrifice light extraction efficiency all, and more full emission has appearred in light in lens inside, caused the light loss consumption, and light extraction efficiency is not high.
The utility model content
The technical problem that the utility model will solve is: the LED rectangular light spot lens that the good uniformity of each point illumination in a kind of light extraction efficiency height, the rectangular light spot is provided.
In order to solve the problems of the technologies described above, the technical scheme that the utility model adopted is:
A kind of LED rectangular light spot lens; These lens have a bottom surface; Said bottom surface central authorities be provided with one receive LED light plane of light incidence; The outer surface of the lens that connect with the bottom surface is the beam projecting face, and said plane of light incidence is to utilize multiple curvature to regulate a plurality of spheres or a plurality of first free form surfaces of the refractive direction of different angles incident ray, and said beam projecting face comprises that a plurality of its surperficial different curvature of utilizing make second free form surface of output facula near rectangle.
Further as preferred embodiment, a plurality of second free form surface symmetric arrays on the said beam projecting face.
Further as preferred embodiment, the connecting portion between said a plurality of second free form surfaces is provided with the attaching parts that are used for transition.
Further as preferred embodiment, said attaching parts be and a plurality of second free form surfaces of the integrated realization of lens between the 3rd free form surface of continuous transition.
Further as preferred embodiment, said attaching parts be and a plurality of second free form surfaces of the integrated realization of lens between the non-free form surface of discontinuous transition.
Further as preferred embodiment, said lens are processed by PC, PMMA, PP, ABS or glass material.
Further as preferred embodiment, the bottom surface of said lens is provided with pilot pin, and said pilot pin is along narrowing down gradually away from the bottom surface direction.
The beneficial effect of the utility model is: the utility model lens have changed the design of traditional LED lens plane of light incidence; Control the refractive direction of incident ray through the different curvature of different parts on plane of light incidence; Thereby reduced the total reflection odds, improved light extraction efficiency; Further, a plurality of second free form surfaces make output facula near rectangle on the beam projecting face, and the illuminance uniformity of each point is good in the hot spot.
Description of drawings
Be described further below in conjunction with the specific embodiment of accompanying drawing the utility model:
Fig. 1 is the structural representation of LED lens in the prior art;
Fig. 2 is another structural representation of LED lens in the prior art;
Fig. 3 is the lateral plan of the utility model lens;
Fig. 4 is the vertical view of the utility model lens.
The specific embodiment
With reference to Fig. 3; A kind of LED rectangular light spot lens; These lens have a bottom surface 2, said bottom surface 2 central authorities be provided with one receive LED light plane of light incidence, the outer surface of the lens that connect with bottom surface 2 is the beam projecting face; Said plane of light incidence is to utilize multiple curvature to regulate a plurality of spheres or a plurality of first free form surfaces 1 of the refractive direction of different angles incident ray, and said beam projecting face comprises that a plurality of its surperficial different curvature of utilizing make second free form surface 3 of output facula near rectangle.The main part of lens is by the common definition space that surrounds of bottom surface 2, plane of light incidence and the beam projecting face of lens.
Further as preferred embodiment; Said lens adopt transparent material to make; For example processed by PC, PMMA, PP, ABS or glass material, lens are processed through injection moulding or Precision Machining, and the plane of light incidence of lens and beam projecting face are through polishing.
In specific embodiment; With reference to Fig. 3; Plane of light incidence is made up of three first free form surfaces 1, and a plurality of first free form surfaces 1 can be regulated the refractive direction of the incident ray of different incidence angles, near the refractive direction of the light beam that the curvature of first free form surface 1 in the middle of being positioned at is with highly regulating the axis; First free form surface 1 that is positioned at both sides can be regulated the refractive direction of the light beam of other parts through the curvature and the selection of height, makes its refraction toward top as far as possible.In practical application, those skilled in the art can be according to the relative position of led light source and lens, and led array selects the height value and the curvature of first free form surface 1 at interval with backlight expection thickness, improves the uniformity that LED-backlit shines.It will be appreciated by those skilled in the art that; Plane of light incidence can also adopt the combination of a plurality of spheres or the face of cylinder and free form surface to adjust the refractive direction of the incident ray at each incoming position place; The number of first free form surface or sphere is not limited by the number shown in Fig. 3, can be for more than three more a plurality of.
Fig. 4 is the vertical view of the utility model lens, and with reference to Fig. 4, the beam projecting face of lens comprises four second free form surfaces 3, and preferably, the connecting portion between four second free form surfaces 3 is provided with the attaching parts that are used for transition.Said attaching parts be and a plurality of second free form surfaces 3 of the integrated realization of lens between the 3rd free form surface 4 of continuous transition.In practical application, the light beam with the light distribution of approximate lambert's type of led light source outgoing gets into lens by first free form surface 1 on the plane of light incidence, and second free form surface 3 is the main emergent face, and the 3rd free form surface 4 is auxilliary exiting surface.Emergent ray can be so that the illuminance uniformity of each point be better in the rectangular light spot through the adjustment of the 3rd free form surface 4.
Preferably, a plurality of second free form surface, 3 symmetric arrays on the said beam projecting face.
Further as preferred embodiment, said attaching parts be and a plurality of second free form surfaces of the integrated realization of lens between the non-free form surface of discontinuous transition.
Certainly, it will be understood by those skilled in the art that on the beam projecting face of lens and can adopt more second free form surface 3 more than four, to form rectangular light spot and to guarantee the uniformity of illuminance of each point in the hot spot.
Preferably, with reference to Fig. 3, the bottom surface 2 of said lens is provided with pilot pin 5, and said pilot pin is structure wide at the top and narrow at the bottom along narrowing down gradually away from bottom surface 2 directions.
The utility model LED rectangular light spot lens can be single hole or porous form, and during installation, the Kong Weiyu light source is relation one to one.
More than be that preferable enforcement to the utility model specifies; But the utility model is created and is not limited to said embodiment; Those of ordinary skill in the art can also make all equivalent variations or replacement under the prerequisite of the utility model spirit, distortion that these are equal to or replacement all are included in the application's claim institute restricted portion.
Claims (7)
1. LED rectangular light spot lens; These lens have a bottom surface; Said bottom surface central authorities be provided with one receive LED light plane of light incidence; The outer surface of the lens that connect with the bottom surface is the beam projecting face, it is characterized in that: said plane of light incidence is to utilize multiple curvature to regulate a plurality of spheres or a plurality of first free form surfaces of the refractive direction of different angles incident ray, and said beam projecting face comprises that a plurality of its surperficial different curvature of utilizing make second free form surface of output facula near rectangle.
2. a kind of LED rectangular light spot lens according to claim 1 is characterized in that: a plurality of second free form surface symmetric arrays on the said beam projecting face.
3. a kind of LED rectangular light spot lens according to claim 2 is characterized in that: the connecting portion between said a plurality of second free form surfaces is provided with the attaching parts that are used for transition.
4. a kind of LED rectangular light spot lens according to claim 3 is characterized in that: said attaching parts for and a plurality of second free form surfaces of the integrated realization of lens between the 3rd free form surface of continuous transition.
5. a kind of LED rectangular light spot lens according to claim 4 is characterized in that: said attaching parts for and a plurality of second free form surfaces of the integrated realization of lens between the non-free form surface of discontinuous transition.
6. according to each described a kind of LED rectangular light spot lens of claim 1 to 5, it is characterized in that: said lens are processed by PC, PMMA, PP, ABS or glass material.
7. a kind of LED rectangular light spot lens according to claim 6, it is characterized in that: the bottom surface of said lens is provided with pilot pin, and said pilot pin is along narrowing down gradually away from the bottom surface direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220108475 CN202581120U (en) | 2012-03-21 | 2012-03-21 | Light emitting diode (LED) rectangular light spot lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220108475 CN202581120U (en) | 2012-03-21 | 2012-03-21 | Light emitting diode (LED) rectangular light spot lens |
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| Publication Number | Publication Date |
|---|---|
| CN202581120U true CN202581120U (en) | 2012-12-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220108475 Expired - Fee Related CN202581120U (en) | 2012-03-21 | 2012-03-21 | Light emitting diode (LED) rectangular light spot lens |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103148443A (en) * | 2013-01-31 | 2013-06-12 | 中国科学技术大学 | Dual-free-curve thick lens for obtaining uniform parallel light beams and array thereof |
| CN104806974A (en) * | 2014-01-29 | 2015-07-29 | 一诠精密电子工业(中国)有限公司 | Optical element |
| CN104964247A (en) * | 2015-06-16 | 2015-10-07 | 郭萌 | Optical lens |
| WO2017075793A1 (en) * | 2015-11-05 | 2017-05-11 | 格瑞电子（厦门）有限公司 | Led headlamp and method for forming led headlamp light spot |
| CN111140818A (en) * | 2020-01-20 | 2020-05-12 | 江西省绿野汽车照明有限公司 | Automobile-used lighting device and car |
| CN111641817A (en) * | 2014-06-03 | 2020-09-08 | Mtt创新公司 | Method and apparatus for displaying video data and image data |
| WO2021078290A1 (en) * | 2019-10-24 | 2021-04-29 | 深圳市绎立锐光科技开发有限公司 | Light source system |
-
2012
- 2012-03-21 CN CN 201220108475 patent/CN202581120U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103148443A (en) * | 2013-01-31 | 2013-06-12 | 中国科学技术大学 | Dual-free-curve thick lens for obtaining uniform parallel light beams and array thereof |
| CN104806974A (en) * | 2014-01-29 | 2015-07-29 | 一诠精密电子工业(中国)有限公司 | Optical element |
| CN111641817A (en) * | 2014-06-03 | 2020-09-08 | Mtt创新公司 | Method and apparatus for displaying video data and image data |
| CN104964247A (en) * | 2015-06-16 | 2015-10-07 | 郭萌 | Optical lens |
| CN104964247B (en) * | 2015-06-16 | 2017-11-24 | 郭萌 | A kind of optical lens |
| WO2017075793A1 (en) * | 2015-11-05 | 2017-05-11 | 格瑞电子（厦门）有限公司 | Led headlamp and method for forming led headlamp light spot |
| WO2021078290A1 (en) * | 2019-10-24 | 2021-04-29 | 深圳市绎立锐光科技开发有限公司 | Light source system |
| CN111140818A (en) * | 2020-01-20 | 2020-05-12 | 江西省绿野汽车照明有限公司 | Automobile-used lighting device and car |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121205 Termination date: 20140321 |