CN103969740A - Diffusion lens, light source module and surface light source - Google Patents
Diffusion lens, light source module and surface light source Download PDFInfo
- Publication number
- CN103969740A CN103969740A CN201310038061.2A CN201310038061A CN103969740A CN 103969740 A CN103969740 A CN 103969740A CN 201310038061 A CN201310038061 A CN 201310038061A CN 103969740 A CN103969740 A CN 103969740A
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- incident
- outgoing
- fresnel structure
- pointolite
- concave surface
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Abstract
The invention provides a diffusion lens comprising a first surface and a second surface back to the first surface. An incident negative Fresnel structure is formed on the first surface, and an emergent negative Fresnel structure aligned to the incident negative Fresnel structure is formed on the second surface. The invention further provides a light source module and a surface light source adopting the diffusion lens. The incident negative Fresnel structure can diffuse light rays emitted by point light sources, and the emergent negative Fresnel structure can secondarily diffuse the light rays diffused by the incident negative Fresnel structure, so that diffusion effect is good. The incident negative Fresnel structure and the emergent negative Fresnel structure do not comprise a large-curvature structure and are easy to form, so that ideal diffusion effect is guaranteed.
Description
Technical field
The present invention relates to light source, particularly a kind of diffusion eyeglass, light source module and area source.
Background technology
Advantages such as light emitting diode is low in energy consumption owing to having, long service life and being widely used in display device as light source.Because light emitting diode is that pointolite and directivity are stronger, and existing display device has large-sized display screen mostly, needs large area, uniform area source, and the light that therefore needs the light emitting diode to send spreads, homogenising processing.At present, generally by light emitting diode matrix is set, and the light that a diffusion eyeglass diffusion light emitting diode sends is set on each light emitting diode, to obtain large area, uniform area source.Existing diffusion eyeglass is generally concavees lens, comprises the plane of incidence of indent and the exit facet of indent.In order to obtain good diffusion effect, the curvature of the plane of incidence and exit facet (the particularly plane of incidence) needs enough large, but the more difficult moulding of the deep camber plane of incidence, causes diffusion effect poor.
Summary of the invention
In view of this, be necessary to provide a kind of diffusion eyeglass that improves diffusion effect.
A kind of diffusion eyeglass, it comprise a first surface and one with the opposing second surface of this first surface, this first surface is formed with the negative Fresnel structure of an incident, this second surface is formed with one and bears with this incident the outgoing that Fresnel structure aligns and bear Fresnel structure.
The present invention also provides a kind of light source module.
A kind of light source module, it comprises that a substrate, is arranged at pointolite and this diffusion eyeglass on this substrate.This diffusion eyeglass is arranged on this substrate and covers this pointolite.The negative Fresnel structure of this incident and this pointolite are just right.
The present invention also provides a kind of area source.
A kind of area source, it comprises that a substrate, multiple being arranged in array are arranged at pointolite and multiple this diffusion eyeglass on this substrate.Each diffusion eyeglass is arranged on this substrate and covers a pointolite.The negative Fresnel structure of each incident is just right with corresponding pointolite.
So, the negative Fresnel structure of this incident can spread the light of this pointolite transmitting, and the negative Fresnel structure of this outgoing can be to the light secondary diffusion after the negative Fresnel structure diffusion of this incident, and diffusion effect is good.And the negative Fresnel structure of the negative Fresnel structure of this incident and this outgoing does not comprise the structure that curvature is large, easily moulding, to ensure to obtain desirable diffusion effect.
Brief description of the drawings
Fig. 1 is the schematic perspective view of the area source of preferred embodiments of the present invention.
Fig. 2 is that the area source of Fig. 1 is along the schematic cross-section of II-II.
Fig. 3 is the enlarged diagram of the III part of the area source of Fig. 2.
Main element symbol description
| Area source | 10 |
| Substrate | 100 |
| Pointolite | 200 |
| Diffusion eyeglass | 300 |
| First surface | 310 |
| Second surface | 320 |
| Fresnel structure is born in incident | 312 |
| Incident central protuberance | 314 |
| Incident annular protrusion | 316 |
| Incident center concave surface | 318 |
| Incident inclination concave surface | 31a |
| Microstructure | 31b |
| Fresnel structure is born in outgoing | 322 |
| Outgoing central protuberance | 324 |
| Outgoing annular protrusion | 326 |
| Outgoing center concave surface | 328 |
| Outgoing inclination concave surface | 32a |
| Body | 340 |
| Supporter | 350 |
Following embodiment further illustrates the present invention in connection with above-mentioned accompanying drawing.
Embodiment
Refer to Fig. 1-2, the area source 10 of preferred embodiments of the present invention, it comprises that a substrate 100, multiple being arranged in array are arranged at pointolite 200 and the multiple diffusion eyeglass 300 being arranged on this substrate 100 on this substrate 100.Each diffusion eyeglass 300 comprises a first surface 310 and one and the opposing second surface 320 of this first surface 310, this first surface 310 is formed with the negative Fresnel structure 312 of an incident, and this second surface 320 is formed with a negative Fresnel structure 322 of outgoing aliging with the negative Fresnel structure 312 of this incident.Each diffusion eyeglass 300 covers a pointolite 200.The negative Fresnel structure 312 of each incident is just right with corresponding pointolite 200.
So, the negative Fresnel structure 312 of this incident can spread the light that this pointolite 200 is launched, and the negative Fresnel structure 322 of this outgoing can be to the light secondary diffusion after negative Fresnel structure 312 diffusions of this incident, and diffusion effect is good.And the negative Fresnel structure 322 of the negative Fresnel structure 312 of this incident and this outgoing does not comprise the structure that curvature is large, easily moulding, to ensure to obtain desirable diffusion effect.
This substrate 100 can be circuit board, can be electrically connected and be formed with in inside driving, control circuit (not shown) with power supply and the plurality of pointolite 200, for driving and control the plurality of pointolite.
The plurality of pointolite 200 can be face type laser diode, and by emitting beam with the surface that it is just right that Fresnel structure is born in this incident.
This diffusion eyeglass 300 comprises a disc-shaped body 340 and an annular support body 350.This first surface 310 and this second surface 320 are positioned on this body 340.This supporter 350 extends from the edge of this first surface 310 and bears Fresnel structure 312 projections around this incident.This supporter 350 is for supporting this body 340 on this substrate 100 so that this body 340 and these pointolite 200 intervals settings.
This first surface 310 is plane, so can further reduce the moulding difficulty of this diffusion eyeglass 300.
This second surface 320 is the convex surface that curvature is less, so also can further reduce the moulding difficulty of this diffusion eyeglass 300.
The negative Fresnel structure 312 of this incident is positioned at this first surface 310 center, comprise from the extended incident central protuberance 314 of this first surface 310 and one group from around this incident central protuberance 314 and the incident annular protrusion 316 arranging with one heart, this incident central protuberance 314 comprise one with opposing and just right with this pointolite 200 incident center concave surface 318 of this first surface 310, each incident annular protrusion 316 comprises an incident inclination concave surface 31a towards this incident central protuberance 314, this incident center concave surface 318 can scrabble up a concave surface with the plurality of incident inclination concave surface 31a.The negative Fresnel structure 322 of this outgoing is positioned at this second surface 320 center, and coaxial with the negative Fresnel structure 312 of this incident.The negative Fresnel structure 322 of this outgoing comprises from the extended outgoing central protuberance 324 of this first surface 310 and one group from around this outgoing central protuberance 324 and the outgoing annular protrusion 326 arranging with one heart, this outgoing central protuberance 324 comprise one with the opposing outgoing center concave surface 328 of this first surface 310, each outgoing annular protrusion 326 comprises an outgoing inclination concave surface 32a towards this outgoing central protuberance 324, and this outgoing center concave surface 328 can scrabble up a concave surface with the plurality of outgoing inclination concave surface 32a.
Refer to Fig. 3, preferably, this incident center concave surface 318 is formed with microstructure 31b.The radiation direction line sending due to this pointolite 200 is stronger, the light that adopts this microstructure 31b can utilize diffusion phenomenon (atomizing effect) to send this pointolite 200 further spreads, so, can improve concave surface refraction diffusion dynamics and exist not the phenomenon of hot spot.This microstructure 31b can obtain by the technique that sandblasts.
In a word; those skilled in the art will be appreciated that; above embodiment is only for the present invention is described; and be not used as limitation of the invention; as long as within connotation scope of the present invention, within the appropriate change that above embodiment is done and variation all drop on the scope of protection of present invention.
Claims (10)
1. a diffusion eyeglass, it comprise a first surface and one with the opposing second surface of this first surface, this first surface is formed with the negative Fresnel structure of an incident, this second surface is formed with one and bears with this incident the outgoing that Fresnel structure aligns and bear Fresnel structure.
2. diffusion eyeglass as claimed in claim 1, is characterized in that, the plurality of pointolite is face type laser diode.
3. diffusion eyeglass as claimed in claim 1, is characterized in that, this diffusion eyeglass comprises a disc-shaped body and an annular support body; This first surface and this second surface are positioned on this body; This supporter extends from the edge of this first surface and bears Fresnel structure projection around this incident; This supporter is used for supporting this body on this substrate so that this body and the setting of this pointolite interval.
4. diffusion eyeglass as claimed in claim 1, is characterized in that, this first surface is plane.
5. diffusion eyeglass as claimed in claim 1, is characterized in that, the negative Fresnel structure of this incident is positioned at the center of this first surface, and the negative Fresnel structure of this outgoing is positioned at the center of this second surface, and coaxial with the negative Fresnel structure of this incident.
6. diffusion eyeglass as claimed in claim 1, it is characterized in that, the negative Fresnel structure of this incident comprises from the extended incident central protuberance of this first surface and one group from around this incident central protuberance and the incident annular protrusion arranging with one heart, this incident central protuberance comprise one with the opposing incident center concave surface of this first surface, each incident annular protrusion comprises an incident inclination concave surface towards this incident central protuberance, and this incident center concave surface and the plurality of incident inclination concave surface scrabble up a concave surface.
7. diffusion eyeglass as claimed in claim 6, is characterized in that, this incident center concave surface is formed with microstructure.
8. diffusion eyeglass as claimed in claim 1, it is characterized in that, the negative Fresnel structure of this outgoing comprises from the extended outgoing central protuberance of this first surface and one group from around this outgoing central protuberance and the outgoing annular protrusion arranging with one heart, this outgoing central protuberance comprise one with the opposing outgoing center concave surface of this first surface, each outgoing annular protrusion comprises an outgoing inclination concave surface towards this outgoing central protuberance, and this outgoing center concave surface and the plurality of outgoing inclination concave surface scrabble up a concave surface.
9. a light source module, it comprises that a substrate, is arranged at pointolite and this diffusion eyeglass on this substrate; This diffusion eyeglass is arranged on this substrate and covers this pointolite; The negative Fresnel structure of this incident and this pointolite are just right.
10. an area source, it comprises that a substrate, multiple being arranged in array are arranged at pointolite and multiple this diffusion eyeglass on this substrate; Each diffusion eyeglass is arranged on this substrate and covers a pointolite; The negative Fresnel structure of each incident is just right with corresponding pointolite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310038061.2A CN103969740A (en) | 2013-01-31 | 2013-01-31 | Diffusion lens, light source module and surface light source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310038061.2A CN103969740A (en) | 2013-01-31 | 2013-01-31 | Diffusion lens, light source module and surface light source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103969740A true CN103969740A (en) | 2014-08-06 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310038061.2A Pending CN103969740A (en) | 2013-01-31 | 2013-01-31 | Diffusion lens, light source module and surface light source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103969740A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105824125A (en) * | 2016-05-25 | 2016-08-03 | 西安炬光科技股份有限公司 | Method and device for laser beam expanding |
| CN108105644A (en) * | 2017-12-19 | 2018-06-01 | 深圳市利科达光电有限公司 | A kind of lens arrangement for LED television backlight |
| WO2019119710A1 (en) * | 2017-12-19 | 2019-06-27 | 深圳市利科达光电有限公司 | Lens structure for led television backlight source |
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| CN108105644A (en) * | 2017-12-19 | 2018-06-01 | 深圳市利科达光电有限公司 | A kind of lens arrangement for LED television backlight |
| WO2019119710A1 (en) * | 2017-12-19 | 2019-06-27 | 深圳市利科达光电有限公司 | Lens structure for led television backlight source |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140806 |