CN100483208C - Light-guiding board and back-light module using same - Google Patents
Light-guiding board and back-light module using same Download PDFInfo
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- CN100483208C CN100483208C CNB200510035878XA CN200510035878A CN100483208C CN 100483208 C CN100483208 C CN 100483208C CN B200510035878X A CNB200510035878X A CN B200510035878XA CN 200510035878 A CN200510035878 A CN 200510035878A CN 100483208 C CN100483208 C CN 100483208C
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- light
- guide plate
- light guide
- module backlight
- passing board
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Abstract
The present invention relates to a light guide board and backlight module adopting said light guide board. Said light guide board includes one light-passing board, said light-passing board including one light income surface, light outgoing surface connected with said light income surface, bottom surface opposite with light outgoing surface, and plurality of mesh point formed on said light-passing board bottom surface, said mesh point being regular hexagon. Said invention also provides backlight module using said light guide board, which can raise backlight module light outgoing uniformity.
Description
[technical field]
The present invention relates to the module backlight of a kind of light guide plate and this light guide plate of employing, relate in particular to a kind of module backlight of light guide plate and this light guide plate of employing of tool network point distribution.
[background technology]
Because the liquid crystal of panel of LCD itself is not had a characteristics of luminescence, thereby, for reaching display effect, need to give the LCD panel that one planar light source device is provided, as module backlight, its role is to area source abundant to panel of LCD supply brightness and that be evenly distributed.
The module backlight of prior art mainly is made up of light source, light guide plate, reflecting plate, diffuser plate and prism plate.This light source can be arranged at light guide plate one side or two opposite sides and with light emission to this light guide plate.The effect of this light guide plate is the transmission direction of direct light line, make light by the even outgoing of the exiting surface of light guide plate, the reflecting plate bottom surface of this light guide plate relatively is provided with, and being reflected into once more by the light of bottom surface of light guide plate outgoing in this light guide plate, improves the utilization factor of light.Diffuser plate sets gradually with the exiting surface of the relative light guide plate of prism plate, so that more even by the distribution of light of light guide plate outgoing, and then the brightness and the homogeneity of raising panel of LCD.
According to the shape of light guide plate, it can be divided into plate shaped light guide plate and wedge shape light guide plate.For increasing the light extraction efficiency and the homogeneity of light guide plate, the one side in light guide plate is provided with V-shaped groove or configuration site usually, and the distance that this V-shaped groove or site distribute on light guide plate has different designs with big I.When light transmission during to V-shaped groove or site, reflection and scattering will take place in light, and to each different directions transmission, finally the exiting surface by light guide plate penetrates.Utilize various densitys, the V-shaped groove that varies in size or site, can make light guide plate luminous evenly.
See also Fig. 1 and Fig. 2, prior art discloses a module 10 backlight, and this module 10 backlight comprises that one has light source 11, that incidence surface and the light guide plate 12, of exiting surface be arranged at these light guide plate 12 incidence surface sides and is arranged at the reflecting plate 15 that diffuser plate 16 that the reflector plate 13 of these light guide plate 12 end faces, relative these light guide plate 12 exiting surfaces be provided with and this light guide plate 12 bottom surfaces relatively are provided with.Wherein, be the light that effectively utilizes light source 11 to be sent, it also is provided with a reflection lampshade 17 in these light source 11 places.In addition, for destroying the total reflection condition of light in light guide plate 12 internal transmission, these light guide plate 12 bottom surfaces are provided with a plurality of circular shaped lattice points 14 that the ranks shape is arranged that are again.This site 14 is arranged into multiple row along the direction with light source 11 axially parallels, and site 14 big or small identical in each row.This site 14 is along being arranged into multirow with the axially vertical directions of light source 11, and the varying in size of site 14 in each row, wherein, near the diameter minimum of the site 14 of light source 11, along with the increase of light source 11 distances, it is big that this site 3 also becomes gradually.
The site 14 of this light guide plate 12 is arranged into multiple row along the direction with light source 11 axially parallels, and the area of the gap that surrounds between its adjacent a plurality of sites 14 (not indicating) is bigger, and promptly the network point distribution density of unit area is lower, and this will cause outgoing light homogeneity lower.And this gap lists at each and is linear concordant arrangement, is applied to display panel, and the gap of the concordant arrangement of each alignment shape may produce a bright line, directly reduce display quality.
In addition, the outgoing light homogeneity of light guide plate 1 whole exiting surface can be improved to a certain extent in the distribution of these light guide plate 12 bottom surfaces in this site 14.Yet because two corners of these light guide plate 12 contiguous light sources 11 belong to the electrode zone of fluorescent tube usually, emitting brightness is extremely low.Thereby be difficult to realize the even fully, consistent of whole light guide plate emitting brightness.
In view of this, providing a kind of is necessity by improving the site design to improve the inhomogeneity light guide plate of whole light guide plate emitting brightness and to adopt the module backlight of this light guide plate in fact.
[summary of the invention]
To a kind of improvement site design be described improving the inhomogeneity light guide plate of whole light guide plate emitting brightness with some embodiment below, and a kind of module backlight that adopts this light guide plate.
For realizing foregoing, a kind of light guide plate is provided, it comprises a light-passing board, this light-passing board comprises an incidence surface, an exiting surface that links to each other with this incidence surface, one and the exiting surface opposed bottom surface; And a plurality of sites that are formed at this light-passing board bottom surface, these a plurality of sites are regular hexagon, and these a plurality of sites are matrix distribution in this bottom surface.
And, a kind of module backlight is provided, it comprises: a light guide plate and a light source, this light guide plate comprises: a light-passing board, this light-passing board comprise one with the close incidence surface of this light source, an exiting surface that links to each other with this incidence surface, one and the exiting surface opposed bottom surface, and a plurality of sites that are formed at this light-passing board bottom surface, these a plurality of sites are regular hexagon, along the direction parallel with incidence surface, these a plurality of sites are arranged into multiple row, and stagger a determining deviation respectively and be alternating expression and distribute in adjacent odd column and even column site.
Compared with prior art, the light guide plate of present embodiment has following advantage: each site of this light guide plate is regular hexagon, therefore the interval area that surrounds between adjacent a plurality of sites is less, the site that is unit area is arranged more tight than circle, thereby better to the scattering of light effect, so outgoing light homogeneity is higher.Further, the present invention has only the light guide plate of single incidence surface, the site is close more from the distribution far away more of this incidence surface, single dot area is big more, scattering power to light is stronger, just can remedy light guide plate and bring out the more weak defective of light intensity, further realize the uniformity coefficient of the whole bright dipping of this light guide plate away from one of incidence surface; It is closeer that the present invention has the network point distribution of light guide plate in being parallel to the middle part bar-shaped zone of incidence surface of two incidence surfaces, the area of single site is bigger, scattering power to light is stronger, just can remedy light guide plate and go out the more weak defective of light intensity, further realize the uniformity coefficient of the whole bright dipping of this light guide plate away from the middle bar-shaped zone of incidence surface.Further, four corners in this bottom surface, along incidence surface axially parallel direction, single dot area is big more the closer to the corner, distribution is close more, can solve the lower problem of four corner emitting brightness that makes light guide plate owing to the electrode influence of fluorescent tube, with the uniformity coefficient of the whole bright dipping of this light guide plate of further raising.
[description of drawings]
Fig. 1 is the side view of the module backlight of prior art.
Fig. 2 is the distribution plan of the site of Fig. 1 module backlight in bottom surface of light guide plate.
Fig. 3 is the side view of the module backlight of first embodiment of the invention.
Fig. 4 is the light guide plate mesh point distribution schematic diagram of Fig. 3 module backlight.
Fig. 5 is the enlarged diagram of the local V of Fig. 4.
Fig. 6 is the side view of the module backlight of second embodiment of the invention.
Fig. 7 is the light guide plate mesh point distribution schematic diagram of Fig. 6 module backlight.
[embodiment]
Below in conjunction with accompanying drawing and a plurality of embodiment light guide plate of the present invention and the module backlight that adopts this light guide plate are described in further detail.
See also Fig. 3, first embodiment of the invention provides a kind of module backlight 20, and this module 20 backlight comprises: a light guide plate (not indicating) and a cold cathode fluorescent lamp 21, this light guide plate comprises a light-passing board 22 and a plurality of site 24.This light-passing board 22 comprise one with the close incidence surface of this cold cathode fluorescent lamp 21 222, an exiting surface that links to each other with this incidence surface 222 224, one and exiting surface 224 opposed bottom surface 226.These a plurality of sites 24 are formed at the bottom surface 226 of this light-passing board 22.
See also Fig. 4, be emitting brightness and the homogeneity that improves this light guide plate, these a plurality of sites 24 distribute as follows on the whole: along with the direction of cold cathode fluorescent lamp 21 axially parallels, these a plurality of sites 24 are arranged into multiple row; Edge and cold cathode fluorescent lamp 21 axial vertical directions, these a plurality of sites 24 are arranged into multirow.Stagger a determining deviation respectively and are the alternating expression distribution in adjacent odd column and even column site.The varying in size of this a plurality of sites 24 in each row, and, near the diameter minimum of the site 24 of cold cathode fluorescent lamp 21, along with the increase of cold cathode fluorescent lamp 21 distances, the area of this site 24 also becomes greatly gradually.
Further, for solving the lower problem of four corner emitting brightness that makes light-passing board 22 owing to the electrode influence of cold cathode fluorescent lamp 21, to improve the uniformity coefficient of these light-passing board 22 whole bright dippings, four corners at light-passing board 22, along incidence surface axially parallel direction, the closer to the corner, the area of single site 24 is big more, distribution is close more.In this enforcement, except that light-passing board 22 4 corners, the site size of each row is identical.
See also Fig. 5, the site 24 of present embodiment comprises general printing ink site or contains the printing ink site of scattering diluent that it can be formed at the bottom surface 226 of this light-passing board 22 by the mode of ink printing.Honey comb like regular hexagon design is adopted in the site 24 of present embodiment.These a plurality of sites 24 are the ranks shape and distribute, edge and cold cathode fluorescent lamp 21 axial vertical directions, the spacing X at neighbour node 24 centers of adjacent odd column and even column
PitchSpan be: 0.7746 millimeter＜X
Pitch＜3.873 millimeters; Along with the direction of cold cathode fluorescent lamp 21 axially parallels, the Y of the spacing at same row neighbour node 24 centers
PitchSpan be: 0.5477 millimeter＜Y
Pitch＜2.739 millimeters.The scope of the hexagonal side length L of this site 24 is 0.123～4.81 millimeter, and the areal extent of this site 24 is 0.0398～60.075 square millimeter.The thickness range of this site 24 is 5～20 microns.
The regular hexagon design with preferred optical capacity usage ratio is adopted in the site 24 of present embodiment, the interval area that surrounds between adjacent a plurality of site 24 is less, the site that is unit area is arranged circular for tight, thereby it is better to the scattering of light effect, therefore outgoing light homogeneity is higher, and this design can effectively provide each optimized angle to look effect, reduces optics Newton ring phenomenon.
Please consult Fig. 3 again, be further to improve the emitting brightness homogeneity and the light utilization efficiency of this light guide plate, present embodiment module 20 backlight further comprises: be set in turn in diffusion sheet 27 on the diffusion sheet 25, a light-collecting piece 26 and of exiting surface 224 tops of this light-passing board 22; One is arranged at the reflector plate 28 of the bottom surface 226 of this light-passing board 22; And one near and surround the reflection shield 29 of this light source 21.
See also Fig. 6, second embodiment of the invention provides a kind of module backlight 30, and this module 30 backlight comprises: a light guide plate (not indicating) and a plurality of cold cathode fluorescent lamp 31,31 ' and, this light guide plate comprises: a light-passing board 32 and a plurality of site 34.This light-passing board 32 comprise two relative incidence surfaces 322,322 ', one with the exiting surface 324 of this two incidence surface 322,322 ' link to each other, one and exiting surface 324 opposed bottom surface 326.These a plurality of sites 34 are formed at the bottom surface 326 of this light-passing board 32.Per two cold cathode fluorescent lamp 31,31 ' respectively near these two incidence surfaces 322,322 ', the light that makes two pairs of cold cathode fluorescent lamp 31,31 ' send is respectively by two incidence surfaces 322,322 ' enter light-passing board 32.Two reflection shields 39 respectively near and surround this two pairs of cold cathode fluorescent lamp 31,31 '.Once diffusion sheet 37 is set in turn in exiting surface 324 tops of this light-passing board 32 on diffusion sheet 35, the light-collecting piece 36 and; One reflector plate 38 is arranged at 326 belows, bottom surface of this light-passing board 32.
See also Fig. 7, these a plurality of sites 34 distribute as follows on the whole: these a plurality of sites 34 are the ranks shape and distribute, and stagger a determining deviation respectively with the even column site and be the alternating expression distribution with the odd column of incidence surface 322,322 ' parallel and adjacent.Be parallel to incidence surface 322,322 ' the middle part bar-shaped zone in site 34 compare the site 34 distribution comparatively denses at other place, the area of site 34 that the area of single site 34 is compared other limit is bigger.In this bar-shaped zone, it is that maximum, single site 34 areas also are maximum with site 34 distribution densities near this place, bar-shaped zone two ends again that site 34 distributes.And at four corners of light-passing board 32, along incidence surface axially parallel direction, the area of single site 34 is big more the closer to the corner, distribution is close more.
In the present embodiment, this light-passing board 32 is 17 inches a flat board, and these a plurality of sites 34 are regular hexagon.Vertical range between the center of adjacent a plurality of site 34 meets the following conditions: X
Pitch: Y
Pitch=(3)
0.5: (3/2), wherein, X
PitchThe spacing of representing neighbour node 34 centers of adjacent odd column and even column; Y
PitchThe spacing of representing same row neighbour node 34 centers.The scope of the length of side L of this site 34 is 0.6196～0.9617 millimeter, and the scope of dot area is 0.9974～2.403 square millimeter.
The light-passing board 32 of present embodiment 326 does not have when site 34 is set in its bottom surface, in it light derive intensity be with away from incidence surface 322,322 ' middle bar-shaped zone the most weak, be close to the incidence surface 322,322 of light-passing board 32 ' locate stronger.Therefore, when the bottom surface 326 at this light-passing board 32 is provided with the site 34 that distributes according to present embodiment,, just can realize the uniformity coefficient of the whole bright dipping of this light guide plate because site 34 sizes and/or distribution density and light are derived the relation on year-on-year basis of intensity.
In addition, the light guide plate of the module backlight 30 of present embodiment comprise except that two incidence surfaces 322,322 ' two sides, this module 30 backlight can comprise further that two reflector plates (figure does not show) are arranged at respectively near these two sides, to prevent that light is from the outgoing of the two sides of this light guide plate.Certainly, also can select to adopt the mode of directly plating highly reflecting films to realize reflection function in these two sides.
Be understandable that light guide plate of the present invention is with transparent material, make as acroleic acid resin, polycarbonate, polyethylene resin or glass etc.Light guide plate of the present invention is not limited to plate shaped, also can be wedge shape.Two cold cathode fluorescent lamp that light source of the present invention also is not limited to be oppositely arranged substitute one of in also available single cold cathode fluorescent lamp, single light emitting diode pointolite, a plurality of light emitting diode pointolite.
Be understandable that, light guide plate of the present invention comprises that also four corners do not carry out the design that increasing is encrypted in the site in the bottom surface: at the light guide plate of single incidence surface, network point distribution is: the site size of each row is identical, these a plurality of sites vary in size in each row, and these a plurality of sites are close more from the distribution far away more of this incidence surface, and single dot area is big more.At the light guide plate of two incidence surfaces, network point distribution is: the site size of each row is identical, is parallel to the network point distribution comparatively dense that other place is compared in site in the middle part bar-shaped zone of incidence surface, and the area of site that the area of single site is compared other limit is bigger.
Each site of light guide plate of the present invention is regular hexagon, and therefore the interval area that surrounds between adjacent a plurality of sites is less, i.e. the site of unit area arrangement circle is closely, thereby better to the scattering of light effect, so outgoing light homogeneity is higher.Further, the present invention has only the light guide plate of single incidence surface, the site is close more from the distribution far away more of this incidence surface, single dot area is big more, scattering power to light is stronger, just can remedy light guide plate and bring out the more weak defective of light intensity, further realize the uniformity coefficient of the whole bright dipping of this light guide plate away from one of incidence surface; It is closeer that the present invention has the network point distribution of light guide plate in being parallel to the middle part bar-shaped zone of incidence surface of two incidence surfaces, the area of single site is bigger, scattering power to light is stronger, just can remedy light guide plate and go out the more weak defective of light intensity, further realize the uniformity coefficient of the whole bright dipping of this light guide plate away from the middle bar-shaped zone of incidence surface.Further, four corners in this bottom surface, along incidence surface axially parallel direction, single dot area is big more the closer to the corner, distribution is close more, can solve the lower problem of four corner emitting brightness that makes light guide plate owing to the electrode influence of fluorescent tube, with the uniformity coefficient of the whole bright dipping of this light guide plate of further raising.
In addition, those skilled in the art also can do other variation in spirit of the present invention, and certainly, the variation that these are done according to spirit of the present invention all should be included in the present invention's scope required for protection.
Claims (19)
1. light guide plate, it comprises a light-passing board, this light-passing board comprises an incidence surface, an exiting surface that links to each other with this incidence surface, one and the exiting surface opposed bottom surface; And a plurality of sites that are formed at this light-passing board bottom surface, it is characterized in that these a plurality of sites are regular hexagon, along the direction parallel with incidence surface, these a plurality of sites are arranged into multiple row, and adjacent odd column staggers a determining deviation respectively with the even column site and is the alternating expression distribution.
2. light guide plate as claimed in claim 1 is characterized in that these a plurality of sites are close more from the distribution far away more of this incidence surface, and single dot area is big more.
3. light guide plate as claimed in claim 1 is characterized in that this light-passing board comprises two relative incidence surfaces, and the network point distribution that is parallel in the middle part bar-shaped zone of this two relative incidence surface is closeer, single dot area maximum.
4. as claim 2 or 3 described light guide plate, it is characterized in that four corners in this bottom surface, along incidence surface axially parallel direction, the closer to the corner, single dot area is big more, distribution is close more.
5. light guide plate as claimed in claim 1 is characterized in that these a plurality of sites are the ranks shape and distribute, and along being row with incidence surface axially parallel direction, the edge is row with the axial vertical direction of incidence surface, and these a plurality of sites meet the following conditions: 0.7746 millimeter＜X
Pitch＜3.873 millimeters, 0.5477 millimeter＜Y
Pitch＜2.739 millimeters, wherein, X
PitchThe vertical interval of representing the neighbour node center of adjacent odd column and even column, Y
PitchThe vertical interval of representing same row neighbour node center.
6. light guide plate as claimed in claim 1, the length of side that it is characterized in that this site is 0.123～4.81 millimeter.
7. light guide plate as claimed in claim 1, the area that it is characterized in that this site is 0.0398～60.075 square millimeter.
8. light guide plate as claimed in claim 1, the thickness that it is characterized in that this site is 5～20 microns.
9. module backlight, it comprises: a light guide plate and a light source, this light guide plate comprises a light-passing board, this light-passing board comprise one with the close incidence surface of this light source, an exiting surface that links to each other with this incidence surface, one and the exiting surface opposed bottom surface, and a plurality of sites that are formed at this light-passing board bottom surface, it is characterized in that these a plurality of sites are regular hexagon, along the direction parallel with incidence surface, these a plurality of sites are arranged into multiple row, and stagger a determining deviation respectively and be alternating expression and distribute in adjacent odd column and even column site.
10. module backlight as claimed in claim 9 is characterized in that these a plurality of sites are close more from the distribution far away more of this incidence surface, and single dot area is big more.
11. module backlight as claimed in claim 9 is characterized in that this light-passing board comprises two relative incidence surfaces, the network point distribution that is parallel in the middle part bar-shaped zone of this two relative incidence surface is closeer, single dot area maximum.
12. as claim 10 or 11 described modules backlight, it is characterized in that four corners in this bottom surface, along incidence surface axially parallel direction, the closer to the corner, single dot area is big more, distribution is close more.
13. module backlight as claimed in claim 11 is characterized in that this module backlight comprises two light sources, it is mutually close with this two incidence surface respectively, and the light that two light sources are sent enters light-passing board by two incidence surfaces.
14. module backlight as claimed in claim 13 is characterized in that this module backlight comprises two reflection shields, its respectively near and surround this two light source.
15. module backlight as claimed in claim 9 is characterized in that this module backlight comprises diffusion sheet on the diffusion sheet once that is set in turn in this light-passing board exiting surface top, the light-collecting piece and.
16. module backlight as claimed in claim 9 is characterized in that this module backlight comprises that one is arranged at the reflector plate of the below, bottom surface of this light-passing board.
17. module backlight as claimed in claim 9 is characterized in that this light-passing board comprises two sides, this module backlight comprises that two are arranged near the reflector plate in these two sides respectively.
18. module backlight as claimed in claim 9 is characterized in that this light-passing board comprises two sides, this module backlight comprises that one is formed at the highly reflecting films of these two sides.
19. module backlight as claimed in claim 9 is characterized in that this light source comprises at least one cold cathode fluorescent lamp, or at least one light emitting diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510035878XA CN100483208C (en) | 2005-07-06 | 2005-07-06 | Light-guiding board and back-light module using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510035878XA CN100483208C (en) | 2005-07-06 | 2005-07-06 | Light-guiding board and back-light module using same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1892339A CN1892339A (en) | 2007-01-10 |
| CN100483208C true CN100483208C (en) | 2009-04-29 |
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ID=37597369
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200510035878XA Expired - Fee Related CN100483208C (en) | 2005-07-06 | 2005-07-06 | Light-guiding board and back-light module using same |
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| Country | Link |
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| CN (1) | CN100483208C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108562963A (en) * | 2017-12-29 | 2018-09-21 | 重庆市中光电显示技术有限公司 | Light guide plate |
| CN108802891B (en) * | 2018-05-11 | 2020-10-02 | 深圳市帝显电子有限公司 | Instrument panel |
| CN108761626B (en) * | 2018-05-11 | 2020-02-07 | 深圳市帝显电子有限公司 | Light guide structure and backlight module |
| CN108761625B (en) * | 2018-05-11 | 2020-08-11 | 深圳市帝显电子有限公司 | Light guide plate and backlight module |
| CN108614320B (en) * | 2018-05-11 | 2020-08-11 | 深圳市帝显电子有限公司 | Vehicle-mounted display |
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|---|---|---|---|---|
| US5450292A (en) * | 1992-03-16 | 1995-09-12 | Enplas Corporation | Surface light source device |
| US5921651A (en) * | 1995-03-31 | 1999-07-13 | Enplas Corporation | Surface light source device of side light type having diffusing element with improved distribution pattern of light |
| JP2002108227A (en) * | 2000-07-26 | 2002-04-10 | Bridgestone Corp | Front light and liquid crystal display device |
| US6412968B1 (en) * | 1997-08-11 | 2002-07-02 | Enplas Corporation | Surface light source device of side light type, liquid crystal display and light guide plate |
| CN1492264A (en) * | 2002-10-24 | 2004-04-28 | 鸿富锦精密工业（深圳）有限公司 | Light guide plate for back light system |
| CN1508602A (en) * | 2002-12-20 | 2004-06-30 | 鸿富锦精密工业（深圳）有限公司 | Area light source device and light board thereof |
| US20040184257A1 (en) * | 2003-01-29 | 2004-09-23 | Chuan-De Huang | Surface light source unit with scatter enhancing regions |
-
2005
- 2005-07-06 CN CNB200510035878XA patent/CN100483208C/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5450292A (en) * | 1992-03-16 | 1995-09-12 | Enplas Corporation | Surface light source device |
| US5921651A (en) * | 1995-03-31 | 1999-07-13 | Enplas Corporation | Surface light source device of side light type having diffusing element with improved distribution pattern of light |
| US6412968B1 (en) * | 1997-08-11 | 2002-07-02 | Enplas Corporation | Surface light source device of side light type, liquid crystal display and light guide plate |
| JP2002108227A (en) * | 2000-07-26 | 2002-04-10 | Bridgestone Corp | Front light and liquid crystal display device |
| CN1492264A (en) * | 2002-10-24 | 2004-04-28 | 鸿富锦精密工业（深圳）有限公司 | Light guide plate for back light system |
| CN1508602A (en) * | 2002-12-20 | 2004-06-30 | 鸿富锦精密工业（深圳）有限公司 | Area light source device and light board thereof |
| US20040184257A1 (en) * | 2003-01-29 | 2004-09-23 | Chuan-De Huang | Surface light source unit with scatter enhancing regions |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1892339A (en) | 2007-01-10 |
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