CN100395616C - Focusing lens and back light module adopting focusing lens - Google Patents
Focusing lens and back light module adopting focusing lens Download PDFInfo
- Publication number
- CN100395616C CN100395616C CNB2004100774757A CN200410077475A CN100395616C CN 100395616 C CN100395616 C CN 100395616C CN B2004100774757 A CNB2004100774757 A CN B2004100774757A CN 200410077475 A CN200410077475 A CN 200410077475A CN 100395616 C CN100395616 C CN 100395616C
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- concentration piece
- light
- array
- guide plate
- fresnel lenses
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Abstract
The present invention discloses a backlight module which comprises a light source, a reflecting sheet, a light guide plate, a diffusion sheet and a light condensing sheet, wherein the light source is positioned at one side of the light guide plate; the reflecting sheet, the light guide plate, the diffusion sheet and the light condensing sheet are orderly placed; the light condensing sheet comprises a light incident surface used for receiving light rays and a light exit surface opposite to the light incident surface; the light exit surface is provided with a Fresnel lens array which is in an integral structure with the light condensing sheet.
Description
[technical field]
The invention relates to a kind of concentration piece and adopt the module backlight of this concentration piece, particularly a kind of module backlight that is used for the concentration piece of LCD and adopts this concentration piece.
[background technology]
Concentration piece is a critical elements in the module backlight, as shown in Figure 1, concentration piece 15 and light source 11, reflector plate 12, light guide plate 13 and diffusion sheet 14 combine and form module 1 backlight, for own and non-luminous liquid crystal panel provide illumination, make liquid crystal panel reach display effect.Concentration piece 15 is a kind of beam condensing units, this concentration piece 15 mainly comprises an incidence surface (not indicating) and an exiting surface (not indicating), its effect is reflected the light after diffusion sheet 14 diffusions, the light that disperses concentrated in the certain angle scope shine liquid crystal panel, thereby improve brightness of illumination.
A kind of prior art concentration piece can be with reference to the international patent application of on August 8th, 1996 bulletin WO96/23649 number, as shown in Figure 2, this concentration piece 20 comprises a substrate 21, on this substrate 21, irritate mould and form several fine 22, and this concentration piece 20 is carried out baking-curing handle with fixing this fine 22, and this concentration piece 20 heat-treated, wherein this heat treated temperature equals the vitrescence transition temperature of resin at least, this thermal treatment makes the vitrescence transition temperature of epoxy material improve about 300K, thereby reduces the influence by this fine 22 formed optically focused odontoid.
But fine 22 of this concentration piece 20 can only be carried out single direction optically focused with light, this fine 22 light is assembled on the line, and these several habitats form a banded uneven caustic surface, thereby its spotlight effect is desirable not to the utmost.
Another kind of prior art concentration piece can be with reference to No. the 01200551st, the Chinese patent of bulletin on November 28 calendar year 2001, and as shown in Figure 3, this concentration piece 35 comprises a substrate 351 and a trickle semi-round ball layer 352.Wherein, this trickle semi-round ball layer 352 is made by epoxy, forms and when still uncured at the filling mould of this trickle semi-round ball layer 352, and these substrate 351 upper surfaces are pasted on the basal surface of this trickle semi-round ball layer 352, forms concentration piece 35.Thereby these trickle semi-round ball layer 352 upper surfaces and substrate 351 basal surfaces form the upper surface 355 and the basal surface 354 of this concentration piece jointly, and the upper surface 355 of this concentration piece 35 has roughness properties and basal surface 354 has smooth property.This trickle semi-round ball layer 352 is to rearrange by being the spherical trickle semi-round ball 353 of semicircle.
Light enters this concentration piece 35 through the basal surface 354 of this concentration piece 35, and by should be trickle during semi-round ball layer 352, these these trickle semi-round ball 353 cambered surfaces of light quilt reflect optically focused, make the light on these concentration piece 35 upper surfaces 355 be preferable brightness.
But this concentration piece 35 is that these substrate 351 upper surfaces are pasted on the basal surface of this trickle semi-round ball layer 352 and form its processing procedure complexity.And light when reflecting optically focused, can be formed the chromatic dispersion aberration by this trickle semi-round ball 353 cambered surfaces at the focus place, cause its spotlight effect ideal not to the utmost.
[summary of the invention]
Not high enough for the concentration piece outgoing light homogeneity that overcomes prior art, as to have chromatic dispersion aberration problem, it is higher to the invention provides a kind of outgoing light homogeneity, and can eliminate the concentration piece of chromatic dispersion aberration.
Not high enough for the module outgoing light homogeneity backlight that overcomes prior art, as to have chromatic dispersion aberration problem, it is higher to the invention provides a kind of outgoing light homogeneity, and can eliminate the module backlight of chromatic dispersion aberration.
The technical scheme that technical solution problem of the present invention is adopted is: a kind of concentration piece is provided, and this concentration piece comprises one in order to the incidence surface of accepting light, an exiting surface relative with this incidence surface, and this exiting surface has array of fresnel lenses.
The technical scheme that technical solution problem of the present invention is adopted is: a kind of module backlight is provided, it comprises a light source, a reflector plate, a light guide plate, a diffusion sheet and a concentration piece, wherein, this light source is positioned at light guide plate one side, this reflector plate, light guide plate, diffusion sheet and concentration piece are placed successively, this concentration piece comprises one in order to the incidence surface of accepting light, an exiting surface relative with this incidence surface, and this exiting surface has array of fresnel lenses.
Compared to prior art, because the concentration piece exiting surface in the present invention's module backlight has array of fresnel lenses, on this single Fresnel lens can accumulate in light a bit, these several focal points can form a uniform caustic surface, and this single Fresnel lens can be eliminated chromatic dispersion and differ, thereby obtains desirable display effect.
[description of drawings]
Fig. 1 is the planimetric map of prior art module backlight.
Fig. 2 is the concentration piece schematic perspective view that the prior art International Patent Application WO discloses for No. 96/23649.
Fig. 3 is the view of the concentration piece of No. 01200551 announcement of prior art Chinese patent.
Fig. 4 is the schematic perspective view of concentration piece of the present invention.
Fig. 5 is the sectional view that amplify the part of concentration piece of the present invention.
Fig. 6 is the planimetric map of the present invention's module backlight.
[embodiment]
Seeing also Fig. 4, is the schematic perspective view of concentration piece of the present invention.This concentration piece 45 comprises one in order to the incidence surface 454 that receives light, an exiting surface 455 relative with this incidence surface 454, wherein, this exiting surface 455 has array of fresnel lenses 452, this array of fresnel lenses 452 is rearranged by a plurality of Fresnel lenses 453, this Fresnel lens 453 to be big or small identical construction be multistage cylindrical salient point with one heart, this concentration piece incidence surface 454 is shiny surfaces and concentration piece exiting surface 455 is uneven surfaces.
Please together consult Fig. 5, light enters this concentration piece 45 through incidence surface 454, and carry out optically focused by array of fresnel lenses 452, finally by 455 outgoing of concentration piece exiting surface, form the array of optically focused focus, make bright dipping even, thereby improve spotlight effect, and can control light gathering efficiency by the number of Fresnel lens upper surface ladder number.
Common refraction convex lens are little to long wavelength's light refraction angle, and amphi position is assembled focus behind lens; Big to the short wavelength light refraction angle, peri position is assembled focus behind lens, therefore forms aberration on the axle of indigo plant, green, red order at the focus place.And the individual layer diffraction lens is opposite with aforementioned common refraction convex lens, and is big to the angle of diffraction of long wavelength's light, and peri position is assembled focus behind lens; Angle of diffraction to short wavelength light is little, and amphi position is assembled focus behind lens, therefore forms aberration on the red, green, blue axle in proper order at the focus place.The Fresnel lens 453 of concentration piece exiting surface 455 of the present invention is salient points of concentric multistage cylindrical configuration, it is the combination of individual layer diffraction lens and common refraction convex lens, light enters this concentration piece 45 through concentration piece incidence surface 454, during by array of fresnel lenses 452, the chromatic dispersion aberration on the axis calibration of the aberration of reverse order can being cancelled out each other, thus spotlight effect improved.
The material of this concentration piece 45 is the organic resins with high index of refraction, better transparency and transmittance, as polyester (Polyester), polycarbonate (Polycarbonate, PC) and polymethylmethacrylate (Polymethyl Methacrylate, PMMA) etc.
This concentration piece 45 can directly be made on the equipment of making light guide plate, by utilizing electron beam or laser e-beam lithography is directly processed or adopted to the die of making this concentration piece 45, on the die of concentration piece mould, form the array of fresnel lenses structure, together extrude by ejection formation and concentration piece 45.
See also Fig. 6, it is the floor map of the present invention's module backlight, this module 5 backlight comprises a light source 51, one reflector plate 52, one light guide plate 53, one diffusion sheet 54 and a concentration piece 45, wherein, this light source 51 is positioned at light guide plate incidence surface 534 1 sides, this reflector plate 52, light guide plate 53, diffusion sheet 54 and concentration piece 45 are placed successively, this concentration piece 45 comprises one in order to receive the incidence surface 454 of light, one exiting surface 455 relative with this incidence surface 454, this exiting surface 455 has array of fresnel lenses 452, and this array of fresnel lenses 452 is rearranged by a plurality of Fresnel lenses 453.
Light source 51 emits beam and enters light guide plate 53 through light guide plate incidence surface 534, its a part of light directly penetrates through light guide plate exiting surface 535, part light also penetrates through light guide plate exiting surface 535 through more than 52 reflection of reflector plate, the emergent ray of light guide plate 53 enters concentration piece 45 by concentration piece incidence surface 454 after diffusion sheet 54 diffusions, and carry out optically focused by array of fresnel lenses 452, finally by 455 outgoing of concentration piece exiting surface, form the array of optically focused focus, make bright dipping even, thereby improve brightness of illumination.
Claims (8)
1. concentration piece, it comprises incidence surface and the exiting surface that is oppositely arranged, and it is characterized in that: this concentration piece exiting surface has array of fresnel lenses.
2. concentration piece as claimed in claim 1 is characterized in that: this array of fresnel lenses is rearranged for concentric multistage cylindrical salient point by a plurality of big or small identical construction.
3. concentration piece as claimed in claim 1 is characterized in that: this array of fresnel lenses and concentration piece are structure as a whole.
4. concentration piece as claimed in claim 1 is characterized in that: the material of this concentration piece is polyester, polycarbonate or polymethylmethacrylate.
5. module backlight, it comprises a light source, a reflector plate, a light guide plate, a diffusion sheet and a concentration piece, wherein, this light source is positioned at light guide plate one side, this reflector plate, light guide plate, diffusion sheet and concentration piece are placed successively, this concentration piece comprises incidence surface and the exiting surface that is oppositely arranged, and it is characterized in that: this concentration piece exiting surface has array of fresnel lenses.
6. module backlight as claimed in claim 5 is characterized in that: this array of fresnel lenses is rearranged for concentric multistage cylindrical salient point by a plurality of big or small identical construction.
7. module backlight as claimed in claim 5 is characterized in that: this array of fresnel lenses and this concentration piece are integrative-structures.
8. module backlight as claimed in claim 5 is characterized in that: the material of this concentration piece is polyester, polycarbonate or polymethylmethacrylate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100774757A CN100395616C (en) | 2004-12-11 | 2004-12-11 | Focusing lens and back light module adopting focusing lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100774757A CN100395616C (en) | 2004-12-11 | 2004-12-11 | Focusing lens and back light module adopting focusing lens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1786787A CN1786787A (en) | 2006-06-14 |
| CN100395616C true CN100395616C (en) | 2008-06-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100774757A Expired - Fee Related CN100395616C (en) | 2004-12-11 | 2004-12-11 | Focusing lens and back light module adopting focusing lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100395616C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101937627A (en) * | 2010-06-21 | 2011-01-05 | 应骏 | Display panel and image correction method thereof |
| CN108649092A (en) * | 2018-06-28 | 2018-10-12 | 华侨大学 | A kind of concentrating solar battery of integrated fractal ring |
| CN111142259A (en) * | 2019-12-21 | 2020-05-12 | 江苏泽景汽车电子股份有限公司 | Reflective cup and splicing type Fresnel lens combined HUD backlight system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000266950A (en) * | 1999-03-16 | 2000-09-29 | Fuji Xerox Co Ltd | Optical wave-guide |
| CN2462424Y (en) * | 2001-01-12 | 2001-11-28 | 唐世杰 | Diffusing lens |
| CN1333885A (en) * | 1999-01-13 | 2002-01-30 | 3M创新有限公司 | Fresnel lens for projection screens |
| JP2002056713A (en) * | 2000-08-08 | 2002-02-22 | Nippon Leiz Co Ltd | Surface light source device |
| CN1444057A (en) * | 2002-03-11 | 2003-09-24 | 伊斯曼柯达公司 | Composite polymer lens for forming visible light diffusion on surface |
| US20040136172A1 (en) * | 2001-09-10 | 2004-07-15 | 3M Innovative Properties Company | Backlighting transmissive displays |
-
2004
- 2004-12-11 CN CNB2004100774757A patent/CN100395616C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1333885A (en) * | 1999-01-13 | 2002-01-30 | 3M创新有限公司 | Fresnel lens for projection screens |
| JP2000266950A (en) * | 1999-03-16 | 2000-09-29 | Fuji Xerox Co Ltd | Optical wave-guide |
| JP2002056713A (en) * | 2000-08-08 | 2002-02-22 | Nippon Leiz Co Ltd | Surface light source device |
| CN2462424Y (en) * | 2001-01-12 | 2001-11-28 | 唐世杰 | Diffusing lens |
| US20040136172A1 (en) * | 2001-09-10 | 2004-07-15 | 3M Innovative Properties Company | Backlighting transmissive displays |
| CN1444057A (en) * | 2002-03-11 | 2003-09-24 | 伊斯曼柯达公司 | Composite polymer lens for forming visible light diffusion on surface |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1786787A (en) | 2006-06-14 |
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Effective date of registration: 20171010 Address after: 200331 room 155-2, ginkgo Road, Shanghai, Putuo District, China, 4 Patentee after: Shanghai State Intellectual Property Services Co.,Ltd. Address before: 518109 Guangdong city of Shenzhen province Baoan District Longhua Town Industrial Zone tabulaeformis tenth East Ring Road No. 2 two Co-patentee before: HON HAI PRECISION INDUSTRY Co.,Ltd. Patentee before: HONG FU JIN PRECISION INDUSTRY (SHENZHEN) Co.,Ltd. |
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