CN1680849A - Focusing sheet and backlight modules therewith - Google Patents
Focusing sheet and backlight modules therewith Download PDFInfo
- Publication number
- CN1680849A CN1680849A CN 200410026813 CN200410026813A CN1680849A CN 1680849 A CN1680849 A CN 1680849A CN 200410026813 CN200410026813 CN 200410026813 CN 200410026813 A CN200410026813 A CN 200410026813A CN 1680849 A CN1680849 A CN 1680849A
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- CN
- China
- Prior art keywords
- concentration piece
- light
- microlens array
- module backlight
- light source
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Planar Illumination Modules (AREA)
- Liquid Crystal (AREA)
Abstract
A backlight module consists of a light source, a reflecting sheet, light guiding plate, a diffusing sheet and a focusing sheet. It is featured as setting light source at one side of light guiding plate; setting abovesaid sheets and plate in sequence as reflecting, guiding, diffusing and focusing. The focusing sheet includes light incoming surface and light outgoing surface having microlens array unified in one body with focusing 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 and an exiting surface, its effect is reflected the light after diffusion sheet 14 diffusions, the light that disperses is 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 No. the 01200551st, the China's Mainland patent of November 28 calendar year 2001 bulletin, and as shown in Figure 2, this concentration piece 25 comprises a substrate 252 and a trickle semi-round ball layer 251.Wherein, this trickle semi-round ball layer 251 is made by epoxy, forms and when still uncured at the filling mould of this trickle semi-round ball layer 251, and these substrate 252 upper surfaces are pasted on the basal surface of this trickle semi-round ball layer 251, forms concentration piece 25.Thereby these trickle semi-round ball layer 251 upper surfaces and substrate 252 basal surfaces form the upper surface 255 and the basal surface 254 of this concentration piece jointly, and the upper surface 255 of this concentration piece 25 has roughness properties and basal surface 254 has smooth property.This trickle semi-round ball layer 251 is to rearrange by being the spherical trickle semi-round ball 253 of semicircle.
Light enters this concentration piece 25 through the basal surface 254 of this concentration piece 25, and by should be trickle during semi-round ball layer 251, these these trickle semi-round ball 253 cambered surfaces of light quilt reflect optically focused, make the light on these concentration piece 25 upper surfaces 255 be preferable brightness.
But, this light enters substrate 252 and trickle semi-round ball layer 251 through the basal surface 254 of this concentration piece 25, from upper surface 255 outgoing processes, because substrate 252 both sides optical medium differences, be respectively substrate 252 and trickle semi-round ball layer 251, cause a part of light when substrate 252 enters trickle semi-round ball layer 251, to produce reflection, cause the luminous energy loss, reduce the efficiency of light energy utilization, and this concentration piece 25 is that these substrate 252 upper surfaces are pasted on the basal surface of this trickle semi-round ball layer 251 and form its processing procedure complexity.
[summary of the invention]
, processing procedure complicated problems not high enough for the concentration piece efficiency of light energy utilization that overcomes prior art the invention provides that a kind of efficiency of light energy utilization is higher, the simple concentration piece of processing procedure.
For overcoming not high enough, the processing procedure complicated problems of the module efficiency of light energy utilization backlight of prior art, the invention provides that a kind of efficiency of light energy utilization is higher, the simple module backlight of processing procedure.
The technical scheme that technical solution problem of the present invention is adopted is: a kind of concentration piece is provided, this concentration piece comprises one in order to the incidence surface of accepting light, an exiting surface relative with this incidence surface, this exiting surface has microlens array, and this microlens array and this concentration piece are integrative-structures.
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 microlens array, and this microlens array and this concentration piece are integrative-structures.
Compared to prior art, because the concentration piece in the present invention's module backlight can directly be made on the equipment of making light guide plate, the microlens array of concentration piece incidence surface directly is formed on the die of concentration piece mould, together extrudes by ejection formation and concentration piece, its processing procedure is simplified.And this microlens array and concentration piece be integrative-structure, and material is identical, and light source emits beam and enters this concentration piece, and portion can not produce reflection within it, reduces the luminous energy loss, thereby improves the efficiency of light energy utilization of module backlight.
[description of drawings]
Fig. 1 is the sectional view of prior art module backlight.
Fig. 2 is the sectional view of prior art concentration piece.
Fig. 3 is the schematic perspective view of concentration piece of the present invention.
Fig. 4 is the light path synoptic diagram that amplify the part of concentration piece shown in Figure 3.
Fig. 5 is the sectional view of the present invention's module backlight.
[embodiment]
Seeing also Fig. 3, is the schematic perspective view of concentration piece of the present invention.This concentration piece 35 comprises one in order to the incidence surface 354 that receives light, an exiting surface 355 relative with this incidence surface 354, and wherein, this exiting surface 355 has microlens array 351, and this microlens array 351 is rearranged by a plurality of identical large and small hemispheres shape salient points 353.
Please together consult Fig. 4, light enters this concentration piece 35 through incidence surface 354, and when light passed through microlens array 351, this light was reflected optically focused by the cambered surface of semisphere salient point 353, finally by 355 outgoing of concentration piece exiting surface.This microlens array 351 can change the transmission direction of light, and the light of oblique incidence toward the vertical direction deviation, is concentrated on outgoing in the certain angle scope with the light of vertical incidence, thereby improves brightness of illumination.This microlens array 351 and concentration piece 35 are integrative-structures, and light source emits beam and enters this concentration piece 35, and portion can not produce reflection within it, reduce the luminous energy loss, thereby improve the efficiency of light energy utilization of module backlight.
The material of this concentration piece 35 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 35 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 35, on the die of concentration piece mould, form the microlens array structure, together extrude by ejection formation and concentration piece 35.As seen, this concentration piece 35 can use the equipment identical with light guide plate to make, and makes simple.
See also Fig. 5, it is the floor map of the present invention's module backlight, this module 5 backlight comprises a light source 51, a reflector plate 52, a light guide plate 53, a diffusion sheet 54 and a concentration piece 35, wherein, this light source 51 is positioned at light guide plate incidence surface 534 1 sides, and this reflector plate 52, light guide plate 53, diffusion sheet 54 and concentration piece 35 are placed successively.
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 35 by concentration piece incidence surface 354 after diffusion sheet 54 diffusions, when light passes through the microlens array 351 of this concentration piece exiting surface 355, this light is reflected optically focused by the cambered surface of this semisphere salient point 353, is finally penetrated by concentration piece exiting surface 355.Because microlens array 351 can change the transmission direction of light, the light of oblique incidence toward the vertical direction deviation, is concentrated on outgoing in the certain angle scope with the light of vertical incidence, thereby improves brightness of illumination.
Concentration piece in the present invention's module backlight can be directly be made on the equipment of making light guide plate, and the microlens array of concentration piece incidence surface directly is formed on the die of concentration piece mould, together extrudes its processing procedure simplification by ejection formation and concentration piece.And this microlens array and concentration piece be integrative-structure, and light source emits beam and enters this concentration piece, and portion can not produce reflection within it, reduces the luminous energy loss, thereby improves the efficiency of light energy utilization of module backlight.
Claims (8)
1. concentration piece, it comprises incidence surface and the exiting surface that is oppositely arranged, this exiting surface has microlens array, it is characterized in that: this microlens array and this concentration piece are integrative-structures.
2. concentration piece as claimed in claim 1 is characterized in that: this microlens array is rearranged by a plurality of identical large and small hemispheres shape salient points.
3. concentration piece as claimed in claim 1 is characterized in that: the material of this concentration piece is polyester, polycarbonate or polymethylmethacrylate.
4. 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 this exiting surface has microlens array, it is characterized in that: this microlens array and this concentration piece are integrative-structures.
5. module backlight as claimed in claim 4 is characterized in that: this light source is a cathode fluorescent tube.
6. module backlight as claimed in claim 4 is characterized in that: this light source is a light-emittingdiode.
7. module backlight as claimed in claim 4 is characterized in that: this microlens array is rearranged by a plurality of identical large and small hemispheres shape salient points.
8. module backlight as claimed in claim 4 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 |
|---|---|---|---|
| CN 200410026813 CN1680849A (en) | 2004-04-08 | 2004-04-08 | Focusing sheet and backlight modules therewith |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410026813 CN1680849A (en) | 2004-04-08 | 2004-04-08 | Focusing sheet and backlight modules therewith |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1680849A true CN1680849A (en) | 2005-10-12 |
Family
ID=35067490
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410026813 Pending CN1680849A (en) | 2004-04-08 | 2004-04-08 | Focusing sheet and backlight modules therewith |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1680849A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100385316C (en) * | 2006-01-05 | 2008-04-30 | 友达光电股份有限公司 | Matric full image backlight module having optical grating point |
| CN101393710B (en) * | 2007-09-21 | 2010-08-25 | 富士迈半导体精密工业（上海）有限公司 | Billboard |
| US20100238378A1 (en) * | 2009-03-18 | 2010-09-23 | Victor Company Of Japan, Ltd. | Optical unit, backlight device, liquid crystal module and liquid crystal display apparatus |
| CN104020600A (en) * | 2014-05-27 | 2014-09-03 | 京东方科技集团股份有限公司 | Display panel and display device |
-
2004
- 2004-04-08 CN CN 200410026813 patent/CN1680849A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100385316C (en) * | 2006-01-05 | 2008-04-30 | 友达光电股份有限公司 | Matric full image backlight module having optical grating point |
| CN101393710B (en) * | 2007-09-21 | 2010-08-25 | 富士迈半导体精密工业（上海）有限公司 | Billboard |
| US20100238378A1 (en) * | 2009-03-18 | 2010-09-23 | Victor Company Of Japan, Ltd. | Optical unit, backlight device, liquid crystal module and liquid crystal display apparatus |
| US8294847B2 (en) * | 2009-03-18 | 2012-10-23 | Victor Company Of Japan, Ltd. | Optical unit, backlight device, liquid crystal module and liquid crystal display apparatus |
| CN104020600A (en) * | 2014-05-27 | 2014-09-03 | 京东方科技集团股份有限公司 | Display panel and display device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |