CN1570679A - Backlight module and light conducting plate - Google Patents
Backlight module and light conducting plate Download PDFInfo
- Publication number
- CN1570679A CN1570679A CN 03139964 CN03139964A CN1570679A CN 1570679 A CN1570679 A CN 1570679A CN 03139964 CN03139964 CN 03139964 CN 03139964 A CN03139964 A CN 03139964A CN 1570679 A CN1570679 A CN 1570679A
- Authority
- CN
- China
- Prior art keywords
- guide plate
- light guide
- incidence surface
- light
- prism
- 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.)
- Granted
Links
Images
Abstract
This invention relates to light conducting board and its aphototropism mold set, which comprises at least one light surface, a floor, and a light-out surface. The light-in surface receives incidence light and is scatter reflected and reflected by its bottom. The light-out surface conducts them out, wherein, there are paralleling lens to the light-out surface, the circle of distance between which is linearly declined with departing the light-in surface.
Description
[technical field]
The invention relates to a kind of module backlight and light guide plate thereof.
[background technology]
LCD is a kind of non-self-emission display apparatus, because of liquid crystal self does not have the characteristics of luminescence, therefore need provide corresponding backlight module or preceding optical mode group as light source, realizes Presentation Function.
Please refer to Fig. 1, is a kind of module backlight 1 of prior art, and this module 1 backlight comprises a light source 11, a reflecting plate 12, a light guide plate 13, a diffuser plate 14 and a blast sheet 15.This light guide plate 13 roughly is plate shaped, and it comprises an incidence surface 131, a bottom surface 133 and an exiting surface 132.Wherein this light source 11 is provided with respect to the incidence surface 131 of light guide plate 13, and this reflecting plate 12, light guide plate 13, diffuser plate 14, blast sheet 15 stack gradually placement.By the light beam that light source 11 sends, this blast sheet 15 of guiding after light guide plate 13, reflecting plate 12 and diffuser plate 14 effects, these blast sheet 15 surfaces are evenly distributed with many parallel prisms 151, and this prism 151 is with this light beam gathering and penetrate module backlight.But because the component number that this module 1 backlight adopts is more and each element is all discrete, it increases the optical energy loss of light beam interface reflection, reduce this module 1 bright dipping briliancy backlight, and the price of blast sheet 15 is higher, causes this module 1 cost backlight higher.
Please refer to Fig. 2, for overcoming above-mentioned shortcoming, prior art provides another kind of module backlight 2, and this module 2 backlight comprises a light source 21, a reflecting plate 23, one light guide plate 20.Many prism structures 222 of distribution on the exiting surface 202 of this light guide plate 20, the bottom surface 203 of this light guide plate 20 is distributed with lattice point structure 221.Wherein this light source 21 is incidence surface 201 settings with respect to light guide plate 20, this reflecting plate 23 and light guide plate 20 stacked placements.The module backlight 2 of this kind structure can save the blast sheet, but, because the transparency carrier 22 of prism structure that is arranged in parallel 222 and light guide plate 20 is integrally formed, prism structure 222 is evenly distributed on the surface of light guide plate 20, it has only the optically focused effect, but can't change light source near-end and long-range luminance difference, thereby outgoing light homogeneity is relatively poor, influences display effect.
[summary of the invention]
For overcoming the relatively poor defective that influences display effect of light guide plate outgoing light homogeneity in the prior art, the invention provides a kind of light guide plate with higher outgoing light homogeneity.
For overcoming the relatively poor defective that influences display effect of module outgoing light homogeneity backlight in the prior art, the invention provides a kind of module backlight with higher outgoing light homogeneity.
Light guide plate of the present invention comprises at least one incidence surface, one and the exiting surface that intersects of incidence surface and one and this exiting surface opposed bottom surface, and exiting surface has many prisms parallel with incidence surface, and the cycle of the spacing distance between these many prisms is with the linear decrease away from incidence surface.
Module backlight of the present invention comprises a light guide plate and at least one light source, this light guide plate comprises at least one incidence surface, one and the exiting surface that intersects of incidence surface and one and this exiting surface opposed bottom surface, and exiting surface has many prisms parallel with incidence surface, the cycle of the spacing distance between these many prisms, this at least one light source was positioned at incidence surface one side with the linear decrease away from incidence surface.
Compared with prior art, the light guide plate exiting surface of module backlight of the present invention has many prisms parallel with incidence surface, the cycle of these many prisms is with the linear decrease away from incidence surface, strengthen apart from light source prism optically focused effect at a distance, thereby can effectively improve the outgoing light homogeneity of this light guide plate, thereby improve the outgoing light homogeneity of module backlight.
[description of drawings]
Fig. 1 is the three-dimensional exploded view of prior art module backlight.
Fig. 2 is the stereographic map of prior art module backlight.
Fig. 3 is the stereographic map of the present invention's module first embodiment backlight.
Fig. 4 is the side view of module backlight shown in Figure 3.
Fig. 5 is the stereographic map of the present invention's module second embodiment backlight.
[embodiment]
Please cooperate with reference to Fig. 3 and Fig. 4, be respectively the stereographic map and the side view of the present invention's module first embodiment backlight.This module 3 backlight comprises a light guide plate 30 and a light source 31, and this light guide plate 30 comprises the bottom surface 303 that an incidence surface 301, one and this incidence surface 301 intersect vertically, and an exiting surface 302 relative with this bottom surface 303.This light source 31 is provided with respect to light guide plate 30 incidence surfaces 301.This incidence surface 301 receives the light beam that is sent from light source 31, and this bottom surface 303 is a plurality of sites 311 of distribution evenly, and it is derived by exiting surface 302 this beam divergence, reflection back guiding exiting surface 302 with this light beam.This exiting surface 302 is provided with many stripe prisms 312 parallel with incidence surface 301.The drift angle angle of this stripe prisms 312 is 60-120 degree, highly is 15-25 μ m, still, when the drift angle angle of stripe prisms 312 is 90 degree, the best when highly being 20 μ m; The prism sum of this stripe prisms 312 is Integer N, and the N value is complied with a function calculation:
N＝R/220
Wherein, R is the total length of light guide plate 30 along incidence surface 301 directions, and the stripe prisms minute surface of close incidence surface is the 1st, is the 2nd successively, the 3rd ... be the N bar away from the person extremely, the period T of n bar prism
nComply with a function:
T
n＝T
0-a(n-1)
Wherein, n=1,2 ..., N, T
0=400 μ m, a=360 μ m/ (N-1).Because fixedly the light harvesting effect and the cycle of the stripe prisms of drift angle and level altitude are the approximately linear inversely prroportional relationship, so, prism comparatively dense light action is stronger at a distance apart from light source, on the contrary, a little less than light source prism light harvesting effect more nearby, therefore the luminance difference of light guide plate can be eliminated, thereby the outgoing light homogeneity of light guide plate can be effectively improved apart from light source near-end and far-end.In addition, this prism 312 can be with exit direction away from past exiting surface 302 centre convergences of the light beam at light guide plate 30 exiting surfaces 302 centers, (Modulation Transfer Function MTF), thereby also can improve the bright dipping briliancy of light guide plate effectively to improve the optics transmissibility factor of light guide plate 30.
The material that these a plurality of sites 311 are adopted is high diverging light material, and its shape can be circular, square or rhombus, can be uniformly distributed in the bottom surface 303 of light guide plate 30, also can be along increasing its size or distribution density gradually away from incidence surface 301.
Please refer to Fig. 5, is the stereographic map of the present invention's module second embodiment backlight.This module 4 backlight comprises a light guide plate 40 and a light source 41, and this light guide plate 40 comprises the bottom surface 403 that an incidence surface 401, one and this incidence surface 401 tilt to intersect, and an exiting surface 402 relative with this bottom surface 403.This light source 41 is provided with respect to light guide plate 40 incidence surfaces 401.A plurality of sites 411 that evenly distribute, this bottom surface 403, this incidence surface 401 receives the light beam that is sent from light source 41, and derive by exiting surface 402 this beam divergence, reflection back guiding exiting surface 402 this bottom surface 403 with this light beam.This exiting surface 402 is provided with many stripe prisms 412 parallel with incidence surface 401.
The drift angle degree of this prism 412 is 60-120 degree, highly is 15-25 μ m, and when the drift angle degree of stripe prisms 412 are 90 degree, the best when highly being 20 μ m; The sum of this stripe prisms 412 is Integer N, and the N value is complied with a function calculation:
N＝R/220
Wherein, R is the total length of light guide plate 40 along incidence surface 401 directions, and the stripe prisms minute surface of close incidence surface is the 1st, is the 2nd successively, the 3rd ... be the N bar away from the person extremely.The period T of n bar prism
nComply with a function:
T
n＝T
0-a(n-1)
Wherein, n=1,2 ..., N, T
0=400 μ m, a=360 μ m/ (N-1).
Claims (10)
1. light guide plate, comprise at least one incidence surface, one and the exiting surface that intersects of incidence surface and one and this exiting surface opposed bottom surface, and exiting surface has many prisms parallel with incidence surface, it is characterized in that: the cycle of the spacing distance between these many prisms is with the linear decrease away from incidence surface.
2. light guide plate as claimed in claim 1 is characterized in that: the prism vertex angle angle of this prism is the 60-120 degree, highly is 15-25 μ m.
3. light guide plate as claimed in claim 2 is characterized in that: the prism vertex angle degree of this prism is 90 degree, highly is 20 μ m.
4. light guide plate as claimed in claim 1 is characterized in that: the sum of these many prisms is Integer N:
N＝R/220
Wherein, R is the total length that light guide plate is counted by incidence surface, and the prism of close incidence surface is the 1st, is the 2nd successively, the 3rd ... to being the N bar away from the person, the cycle of n bar prism is T
n:
T
n＝T
0-a(n-1)
Wherein, n=1,2 ..., N, T
0=400 μ m, a=360 μ m/ (N-1).
5. light guide plate as claimed in claim 1 is characterized in that: this bottom surface is vertically intersected on incidence surface.
6. light guide plate as claimed in claim 1 is characterized in that: this bottom surface and incidence surface tilt to intersect.
7. light guide plate as claimed in claim 1 is characterized in that: this bottom surface is a plurality of sites of distribution evenly.
8. light guide plate as claimed in claim 1 is characterized in that: a plurality of sites that distribute, this bottom surface, the distribution of this site is along becoming close gradually away from the incidence surface direction.
9. light guide plate as claimed in claim 1 is characterized in that: a plurality of sites that distribute, this bottom surface, the volume of this site is along becoming big gradually away from the incidence surface direction.
10. module backlight, it comprises a light guide plate and at least one light source, and this light guide plate has incidence surface, and this at least one light source is arranged at this incidence surface one side, it is characterized in that: this light guide plate is any described light guide plate in the claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031399649A CN100351655C (en) | 2003-07-26 | 2003-07-26 | Backlight module and light conducting plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031399649A CN100351655C (en) | 2003-07-26 | 2003-07-26 | Backlight module and light conducting plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1570679A true CN1570679A (en) | 2005-01-26 |
| CN100351655C CN100351655C (en) | 2007-11-28 |
Family
ID=34470784
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031399649A Expired - Fee Related CN100351655C (en) | 2003-07-26 | 2003-07-26 | Backlight module and light conducting plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100351655C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100416369C (en) * | 2005-10-13 | 2008-09-03 | 长兴化学工业股份有限公司 | Light-focusing plate |
| CN104181721A (en) * | 2013-05-27 | 2014-12-03 | 乐金显示有限公司 | Display device |
| CN105891939A (en) * | 2016-06-20 | 2016-08-24 | 倪中生 | Novel injection molding light guide plate and machining process thereof |
| CN114089464A (en) * | 2022-01-20 | 2022-02-25 | 扬昕科技(苏州)有限公司 | Light guide plate with gradual change microstructure and light source module thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3263460B2 (en) * | 1992-09-02 | 2002-03-04 | シャープ株式会社 | Backlight device |
| JP3006306B2 (en) * | 1992-09-16 | 2000-02-07 | インターナショナル・ビジネス・マシーンズ・コーポレイション | Optical film and liquid crystal display device using the optical film |
| JP3582544B2 (en) * | 1995-06-20 | 2004-10-27 | 大日本印刷株式会社 | Lens sheet, surface light source and display device |
| JP3257457B2 (en) * | 1997-07-31 | 2002-02-18 | 株式会社日立製作所 | Liquid crystal display |
| JP2001033783A (en) * | 1999-05-17 | 2001-02-09 | Matsushita Electric Ind Co Ltd | Liquid crystal display element and liquid crystal display device utilizing the same |
-
2003
- 2003-07-26 CN CNB031399649A patent/CN100351655C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100416369C (en) * | 2005-10-13 | 2008-09-03 | 长兴化学工业股份有限公司 | Light-focusing plate |
| CN104181721A (en) * | 2013-05-27 | 2014-12-03 | 乐金显示有限公司 | Display device |
| US9482900B2 (en) | 2013-05-27 | 2016-11-01 | Lg Display Co., Ltd. | Display device |
| CN104181721B (en) * | 2013-05-27 | 2017-07-14 | 乐金显示有限公司 | Display device |
| CN105891939A (en) * | 2016-06-20 | 2016-08-24 | 倪中生 | Novel injection molding light guide plate and machining process thereof |
| CN114089464A (en) * | 2022-01-20 | 2022-02-25 | 扬昕科技(苏州)有限公司 | Light guide plate with gradual change microstructure and light source module thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100351655C (en) | 2007-11-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100462797C (en) | Light guiding plate | |
| US8287172B2 (en) | Planar illumination device | |
| CN1773345A (en) | Light conducting plate and back light module | |
| CN1779518A (en) | Light-conducting board and backlight mould set | |
| CN1912703A (en) | Direct light backlight mould set and its transmitting plate | |
| CN1570720A (en) | Backlight source device and liquid crystal display | |
| CN1580901A (en) | Back light assembly and its light guide board | |
| CN100351655C (en) | Backlight module and light conducting plate | |
| CN2604706Y (en) | Back light module block | |
| CN104006353A (en) | Reflection piece, light source module and display device | |
| CN1266411C (en) | Light board device | |
| CN2852185Y (en) | Prism sheet and prism sheet set | |
| CN1580900A (en) | Back light assembly | |
| CN1504776A (en) | Light conducting element | |
| CN1508601A (en) | Back light system | |
| CN1949048A (en) | Backlight module and light guiding plate thereof | |
| CN1542465A (en) | Backlight module and light conducting plate | |
| CN1612017A (en) | Back light module assembly and its light guide board | |
| CN1627152A (en) | Light guiding plate | |
| CN1580899A (en) | Back light module and its light guide board | |
| CN1291248C (en) | Light conducting board and area source apparatus | |
| CN2586983Y (en) | Back light system | |
| CN1619375A (en) | Back light module | |
| CN1614470A (en) | Light conductive board | |
| CN2613768Y (en) | Lighting guiding board and area source |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071128 Termination date: 20160726 |