CN100399065C - Optical diffusion plate and backlight module using the optical diffusion plate - Google Patents
Optical diffusion plate and backlight module using the optical diffusion plate Download PDFInfo
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- CN100399065C CN100399065C CNB2006100748889A CN200610074888A CN100399065C CN 100399065 C CN100399065 C CN 100399065C CN B2006100748889 A CNB2006100748889 A CN B2006100748889A CN 200610074888 A CN200610074888 A CN 200610074888A CN 100399065 C CN100399065 C CN 100399065C
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- support portion
- backlight
- optical diffusing
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Abstract
The present invention discloses an optical diffusion plate and a backlight module matched with a liquid crystal display panel, wherein the backlight module mainly comprises a backlight shell body, a reflecting plate, a light-emitting device, an optical diffusion plate and a membrane, and an optical diffusion sheet mainly comprises a diffusion plate body, a first supporting part and a second supporting part. The diffusion plate body has a light-emitting surface, and the first supporting part and the second supporting part respectively arranged at both sides of the diffusion plate body respectively extend to a direction which is far away from the light-emitting surface. The membrane is arranged on the diffusion plate body and positioned between the first supporting part and the second supporting part. The first supporting part and the second supporting part are butted and supported on a liquid crystal display panel.
Description
Technical field
The present invention relates to a kind of optical diffusing plate, and the backlight module that uses this optical diffusing plate; More specifically, the invention relates to optical diffusing plate and the backlight module that a kind of confession and display panels are used.
Background technology
Backlight module is widely used in liquid crystal indicator, computer keyboard, mobile phone button, advertisement plate and other needs on the device of light source, to provide this type of device required planar light source.Particularly the market demand of liquid crystal indicator is grown up significantly in recent years, and for the fluid,matching crystal device reaches apparent requirement on function, the employed backlight module design of liquid crystal indicator also becomes more diversified.
Figure 1 shows that traditional backlight module and display panels synoptic diagram.As shown in Figure 1, backlight module 30 mainly comprises lower house 31, reflecting plate 32, light-emitting device 33, diffuser plate 50, diaphragm 35 and upper shell 37.Light-emitting device 33 is contained in the lower house 31, and reflecting plate 32 then places between lower house 31 and the light-emitting device 33.Be sequentially provided with diffuser plate 50 and diaphragm 35 on the light-emitting device 33.As shown in Figure 1, diffuser plate 50 and diaphragm 35 are simple schistose texture, are stacked in regular turn on the light-emitting device 33.37 of upper shells cover and positioning film 35 and diffuser plate 50, and engage with lower house 31.
Summary of the invention
A purpose of the present invention is to provide a kind of optical diffusing plate, has the function that supports display panels.
Another object of the present invention is to provide a kind of optical diffusing plate, have the function of its upper diaphragm of location.
Another object of the present invention is to provide a kind of optical diffusing plate, can reduce the quantity of backlight module combine component.
Another object of the present invention is to provide a kind of optical diffusing plate, can save the flow process and the time of backlight module assembling.
Another object of the present invention is to provide a kind of backlight module, have less combine component quantity.
Another object of the present invention is to provide a kind of backlight module, can save the flow process and the time of assembling.
Optical diffusing plate of the present invention uses for a backlight module, and this optical diffusing plate comprises: a diffuser plate body, comprise one first end, one second end and be positioned at this first end and this second end between an exiting surface; At least one first support portion is arranged at the side of this diffuser plate body corresponding to this first end integratedly, and extends towards the direction away from this exiting surface; And at least one second support portion, be arranged at the side of this diffuser plate body integratedly, and extend towards direction away from this exiting surface corresponding to this second end.
Backlight module of the present invention for being used with a display panels, comprising: a housing backlight; One light-emitting device is arranged in this housing backlight; One optical diffusing plate is arranged on this light-emitting device, and is connected with this housing backlight, and this optical diffusing plate comprises: a diffuser plate body, comprise one first end, one second end and be positioned at this first end and this second end between an exiting surface; One first support portion is arranged at the side of this diffuser plate body corresponding to this first end integratedly, and extends towards the direction away from this exiting surface; And one second support portion, be arranged at the side of this diffuser plate body integratedly, and extend towards direction away from this exiting surface corresponding to this second end; And at least one diaphragm, be arranged on this optical diffusing plate, and between this first support portion and this second support portion.
Backlight module of the present invention mainly comprises housing backlight, reflecting plate, light-emitting device, optical diffusing plate and diaphragm.Reflecting plate and light-emitting device are arranged in the housing backlight in regular turn, and wherein light-emitting device preferably comprises many fluorescent tubes.Optical diffusing plate is arranged on the light-emitting device, and is connected with housing backlight.Diaphragm arrangement is in the optical diffusing plate top.Be provided with display panels on the backlight module, and supported by optical diffusing plate.
Optical diffusing plate mainly comprises diffuser plate body, first support portion and second support portion.The diffuser plate body comprise first end, second end and be positioned at first end and second end between exiting surface.Exiting surface also has a bright dipping zone.First support portion and second support portion are arranged at the side of diffuser plate body corresponding to first end and second end respectively, and extend towards the direction away from exiting surface respectively.First support portion and second support portion are preferable extends along the edge in bright dipping zone respectively.Diaphragm arrangement is on the diffuser plate body, and between first support portion and second support portion.First support portion and the second support portion butt also support display panels.
In preferred embodiment, first support portion and second support portion are outward extended with housing connecting portion backlight respectively.Housing connecting portion backlight connects the upper surface of housing sidewall backlight.In addition, first support portion and second support portion diaphragm location division that stretches out respectively.The diaphragm that is arranged on the exiting surface stretches between diaphragm location division and the diffuser plate body, and the diaphragm location division is able to the displacement of limiting diaphragm thus.
Description of drawings
Fig. 1 is the synoptic diagram of existing backlight module and display panels;
Fig. 2 is the embodiment assembly exploded view of backlight module of the present invention and fluid,matching LCD panel;
Fig. 3 is the embodiment synoptic diagram of optical diffusing plate of the present invention;
Fig. 4 is a diagrammatic cross-section embodiment illustrated in fig. 3;
Fig. 5 is another embodiment synoptic diagram of optical diffusing plate of the present invention;
Fig. 6 is the embodiment diagrammatic cross-section of backlight module of the present invention and fluid,matching LCD panel;
Fig. 7 a is another embodiment diagrammatic cross-section of backlight module and display panels;
Fig. 7 b is another embodiment diagrammatic cross-section of backlight module and display panels;
Fig. 8 a is another embodiment diagrammatic cross-section of backlight module and display panels;
Fig. 8 b is another embodiment diagrammatic cross-section of backlight module and display panels;
Fig. 8 c is another embodiment diagrammatic cross-section of backlight module and display panels;
Fig. 9 comprises the embodiment diagrammatic cross-section of diaphragm location division for optical diffusing plate;
Figure 10 is another embodiment synoptic diagram of optical diffusing plate.
The main element symbol description
10 display panels
15 housings
30 backlight modules
31 lower houses
32 reflecting plates
33 light-emitting devices
50 diffuser plates
35 diaphragms
37 upper shells
100 display panels
150 display panels housings
300 backlight modules
310 housings backlight
311 sidewalls
317 lateral walls
319 teats
320 reflecting plates
330 light-emitting devices
350 diaphragms
500 optical diffusing plates
510 first support portions
520 second support portions
530 the 3rd support portions
540 the 4th support portions
550 diffuser plate bodies
551 first ends
552 second ends
553 the 3rd ends
554 the 4th ends
570 exiting surfaces
575 bright dipping zones
590 spacer portion
600 housing barrier structures
800 fenders
900 housing connecting portions backlight
910 kinks
911 holes
950 diaphragm location divisions
Embodiment
The invention provides a kind of optical diffusing plate, and the backlight module that uses this optical diffusing plate.With preferred embodiment, this backlight module feed flow LCD panel uses.Yet in different embodiment, this backlight module also can need the device of planar light source to use for computer keyboard, mobile phone button, billboard and other.In preferred embodiment, backlight module of the present invention is for being used with display panels, to provide display panels required back light.
In the embodiment shown in Figure 2, backlight module 300 mainly comprises housing 310 backlight, reflecting plate 320, light-emitting device 330, optical diffusing plate 500 and diaphragm 350.Housing 310 backlight is provided as the base of backlight module 300.In preferred embodiment, housing 310 backlight is made of metal.Yet in different embodiment, housing 310 backlight also can be made by the higher plastics of intensity.
As shown in Figure 2, housing 310 backlight has sidewall 311, and reflecting plate 320 and light-emitting device 330 then are arranged in the housing 310 backlight in regular turn, and between sidewall 311.Wherein light-emitting device 330 preferably comprises many fluorescent tubes, and arranges in mode arranged side by side.Yet in different embodiment, light-emitting device 330 also can comprise single straight line fluorescent tube or the L shaped fluorescent tube that is arranged at a side.The fluorescent tube of this place speech is preferably cold cathode ray tube, yet also can be the line source that outer electrode fluorescent tube (EEFL) for example waits or be pointolite or other dissimilar various illuminating source of for example light emitting diode etc.
Optical diffusing plate 500 is arranged on the light-emitting device 330, and is connected with housing 310 backlight.In preferred embodiment, optical diffusing plate 500 connects the upper surface of housing 310 sidewalls 311 backlight.Yet in different embodiment, optical diffusing plate 500 also can connect the lateral wall of housing 310 backlight.Its connected mode can comprise be spirally connected, splicing, clamping or other different connected modes.Diaphragm 350 is arranged at optical diffusing plate 500 tops.The diaphragm 350 of this place speech is preferably optical thin film, and it can for example be: brightness enhancement film, light polarizing film etc.
Be provided with display panels 100 and display panels housing 150 on the backlight module 300.Light selfluminous device 330 upwards penetrates, through optical diffusing plate 500 and diaphragm 350, and the display panels 100 that arrives.Display panels 100 is preferably color liquid crystal display panel.Yet in different embodiment, display panels 100 also can comprise monochromatic liquid crystal panel.
Figure 3 shows that the embodiment synoptic diagram of optical diffusing plate 500.As shown in Figure 3, optical diffusing plate 500 mainly comprises diffuser plate body 550, first support portion 510 and second support portion 520.The light that optical diffusing plate 500 mainly penetrates light-emitting device 330 is spread and is even.In preferred embodiment, optical diffusing plate 500 also can have the function that improves front face brightness.
As shown in Figure 3, first support portion 510 and second support portion 520 are arranged at the side of diffuser plate body 550 corresponding to first end 551 and second end 552 respectively.By the cut-open view of Fig. 4 as seen, extend towards the direction away from exiting surface 570 respectively first support portion 510 and second support portion 520.In Fig. 3 and embodiment shown in Figure 4, first support portion 510 and second support portion 520 are respectively rectangular schistose texture, and are extended vertically upward by diffuser plate body 550.Yet in different embodiment, first support portion 510 and second support portion 520 also can be the structure with other section shape, and its bearing of trend also can press from both sides different angles with the diffuser plate body.In addition, first support portion 510 and second support portion, 520 preferable and diffuser plate body 550 one-body molded making.Yet in different embodiment, first support portion 510 and second support portion 520 are connected with diffuser plate body 550 after also can making separately again.Must it should be noted that first support portion 510 is preferable to have formation and the set-up mode identical with second support portion 520.Yet under the consideration of different designs, also can there be different formation and set-up mode in first support portion 510 and second support portion 520.
As shown in Figure 3, exiting surface 570 comprises a bright dipping zone 575 simultaneously, and the light that enters optical diffusing plate 500 is promptly outwards penetrated by bright dipping zone 575.Bright dipping zone 575 is between first support portion 510 and second support portion 520.Extend along the edge in bright dipping zone 575 respectively first support portion 510 and second support portion 520.In this preferred embodiment, the length out of the ordinary of first support portion 510 and second support portion 520 can be equal to or less than the length of side of diffuser plate body 550; First support portion 510 and second support portion 520 can distinctly be formed (for example shown in Figure 3) by continuous single support member, or are formed (for example shown in Figure 5) by discontinuous a plurality of support member.In addition, in Fig. 3 and embodiment shown in Figure 5, first support portion 510 and second support portion 520 are preferably adopted and are symmetrical arranged.Yet in different embodiment, asymmetric settings such as staggered also can be adopted in first support portion 510 and second support portion 520.
As shown in Figure 6, diaphragm 350 is arranged on the diffuser plate body 550, and between first support portion 510 and second support portion 520.First support portion 510 and second support portion, 520 butts also support display panels 100.In this embodiment, be provided with fender 800 on first support portion 510 and second support portion 520, that is first support portion 510 and second support portion 520 contact with liquid crystal display face 100 by fender 800.When backlight module 300 or display panels 100 were subjected to external force, fender 800 can reduce the injury of the 520 pairs of display panels 100 in first support portion 510 and second support portion.Fender 800 is preferably by flexible materials of tool such as shock-absorbing rubber, foams made.
In the embodiment shown in fig. 6, first support portion 510 and second support portion 520 are outward extended with housing connecting portion 900 backlight respectively.As shown in Figure 6, housing connecting portion 900 backlight stretches out from the stage casing part of first support portion 510, and parallel with diffuser plate body 550.Housing connecting portion backlight 900 is preferable one-body molded with the diffuser plate body 550 and first support portion 510.Yet in different embodiment, housing connecting portion 900 backlight also can be connected with first support portion 510 separately.
As shown in Figure 6, housing connecting portion 900 backlight connects the upper surface of housing 310 sidewalls 311 backlight.Its connected mode preferably adopts the screw interlocking, yet also can be modes such as splicing or clamping.In the embodiment shown in Fig. 7 a, housing connecting portion 900 backlight stretches out from first support portion 510, and and then bends downwards to form kink 910.Kink 910 connects the lateral wall 317 of housing 310 backlight.Its connected mode is preferably established a holes 911 on kink 910, and the teat 319 that fastens with holes is set on the outside surface of lateral wall 317, to form the clamping state of kink 910 and lateral wall 317.Yet in different embodiment, the set-up mode of holes 911 and teat 319 also can be exchanged, that is, on kink 910, form teat, on lateral wall, form corresponding holes; In addition, also can adopt different connected modes such as screw closure or splicing.In the embodiment shown in Fig. 7 b, kink 910 is upwards to be bent by housing connecting portion 900 backlight to form.This moment, kink 910 can be used as the housing barrier structure, for the inside pressure of opposing display panels housing 150.
In embodiment as shown in Figure 6, first support portion 510 directly joins with first end 551.Yet in another embodiment shown in Fig. 8 a, first support portion 510 and 551 at first end have a spacer portion 590.In other words, this spacer portion 590 can be considered to stretch out from the bottom of first support portion 510 and forms.In this embodiment, spacer portion 590 can be used as the connecting portion that is connected with housing 310 backlight.In the embodiment shown in Fig. 8 b, first end 551 also can be directed upwardly along vertical exiting surface 570 and extend housing barrier structure 600, for the inside pressure of opposing display panels housing 150.
Fig. 8 c is depicted as another embodiment of the present invention.In this embodiment, when first support portion 510 directly joins with first end 551, also can directly join with the direct upper surface in the bottom surface of diffuser plate body 550 with housing 310 sidewalls 311 backlight.In this embodiment, diffuser plate body 550 engages for using double faced adhesive tape with the preferable connected mode of housing 310 sidewalls 311 upper surfaces backlight.
In embodiment as shown in Figure 9, optical diffusing plate 500 further comprises diaphragm location division 950.Diaphragm location division 950 respectively from first support portion 510 and second support portion 520 extend internally.Diaphragm 350 edges that are arranged on the exiting surface 570 can stretch between diaphragm location division 950 and the diffuser plate body 550, and diaphragm location division 950 is able to the displacement of limiting diaphragm 350 thus.In addition, the concavo-convex distribution that the edge of diaphragm 350 also can corresponding diaphragm location division 950 and designing is to form the edge at concavo-convex interval.Diaphragm location division 950 preferably is parallel to exiting surface 570; Yet in different embodiment, diaphragm location division 950 also can press from both sides different angles with exiting surface 570.
As shown in Figure 9, diaphragm location division 950 is preferably bent inwards by first support portion 510 or second support portion 520 and forms; Yet in different embodiment, diaphragm location division 950 also can be from first support portion 510 or the stage casing part of second support portion 520 extend internally and form.Diaphragm location division 950 is preferably one-body molded with first support portion 510 or second support portion 520; Yet in different embodiment, diaphragm location division 950 also can external mode be connected in first support portion 510 or second support portion 520.
In embodiment as shown in figure 10, diffuser plate body 550 is the rectangle plate body, the long limit that first end 551 and second end 552 are provided with for subtend, and the minor face that the 3rd end 553 and the 4th end 554 are provided with for subtend.First end 551, second end 552, the 3rd end 553 and the 4th end 554 form four ora terminalis of diffuser plate body 550.
As shown in figure 10, optical diffusing plate 500 further comprises the 3rd support portion 530 and the 4th support portion 540.The 3rd support portion 530 and the 4th support portion 540 are arranged at the side of diffuser plate body 550 corresponding to the 3rd end 553 and the 4th end 554 respectively.Extend towards the direction away from exiting surface 570 respectively the 3rd support portion 530 and the 4th support portion 540.575 in bright dipping zone is between first support portion 510, second support portion 520, the 3rd support portion 530 and the 4th support portion 540.
In preferred embodiment, the 3rd support portion 530 and the 4th support portion 540 are for being symmetrical arranged; Yet in different embodiment, asymmetric set-up modes such as staggered also can be adopted in the 3rd support portion 530 and the 4th support portion 540.In addition, the 3rd support portion 530 preferably has identical generation type and profile construction with first support portion 510 or second support portion 520 with the 4th support portion 540; Yet in different embodiment, the 3rd support portion 530 and the 4th support portion 540 also can be adopted and the different design in first support portion or second support portion 520.
The present invention is described by above-mentioned related embodiment, yet the foregoing description is only for implementing example of the present invention.Must be pointed out that the embodiment that has disclosed does not limit the scope of the invention.On the contrary, being included in the spirit of claim and the modification and impartial setting of scope is included in the scope of the present invention.
Claims (22)
1. an optical diffusing plate uses for a backlight module, and this optical diffusing plate comprises:
One diffuser plate body, comprise one first end, one second end and be positioned at this first end and this second end between an exiting surface;
At least one first support portion is arranged at the side of this diffuser plate body corresponding to this first end integratedly, and extends towards the direction away from this exiting surface; And
At least one second support portion is arranged at the side of this diffuser plate body corresponding to this second end integratedly, and extends towards the direction away from this exiting surface.
2. optical diffusing plate as claimed in claim 1, wherein this first support portion comprises discontinuous a plurality of support member at least.
3. optical diffusing plate as claimed in claim 1, wherein this first support portion and this first end join.
4. optical diffusing plate as claimed in claim 1 wherein has a spacer portion between this first support portion and this first end.
5. optical diffusing plate as claimed in claim 4, wherein this diffuser plate body extends a housing barrier structure from this first end along vertical this exiting surface direction.
6. optical diffusing plate as claimed in claim 1, wherein this first support portion housing connecting portion backlight that stretches out.
7. optical diffusing plate as claimed in claim 6, wherein this housing connecting portion backlight comprises a kink.
8. optical diffusing plate as claimed in claim 1, wherein the top of this first support portion is provided with a fender.
9. optical diffusing plate as claimed in claim 1 further comprises a diaphragm location division, and this diaphragm location division is to extend internally from this first support portion.
10. optical diffusing plate as claimed in claim 9, wherein this diaphragm location division is bent inwards by first support portion and forms.
11. optical diffusing plate as claimed in claim 1, wherein this first end and this second end are the subtend settings, and further comprise:
One the 3rd support portion; And
One the 4th support portion;
Wherein this diffuser plate body comprises one the 3rd end and one the 4th end that subtend is provided with; The 3rd support portion and the 4th support portion are arranged at the side of this diffuser plate body corresponding to the 3rd end and the 4th end respectively, and extend towards the direction away from this exiting surface.
12. a backlight module for being used with a display panels, comprising:
One housing backlight;
One light-emitting device is arranged in this housing backlight;
One optical diffusing plate is arranged on this light-emitting device, and is connected with this housing backlight, and this optical diffusing plate comprises:
One diffuser plate body, comprise one first end, one second end and be positioned at this first end and this second end between an exiting surface;
One first support portion is arranged at the side of this diffuser plate body corresponding to this first end integratedly, and extends towards the direction away from this exiting surface; And
One second support portion is arranged at the side of this diffuser plate body corresponding to this second end integratedly, and extends towards the direction away from this exiting surface; And
At least one diaphragm is arranged on this optical diffusing plate, and between this first support portion and this second support portion.
13. backlight module as claimed in claim 12, wherein this first support portion comprises discontinuous a plurality of support member at least.
14. backlight module as claimed in claim 12, wherein this first support portion and this first end join.
15. backlight module as claimed in claim 12 wherein has a spacer portion between this first support portion and this first end.
16. backlight module as claimed in claim 15, wherein this diffuser plate body extends a housing barrier structure from this first end along vertical this exiting surface direction.
17. backlight module as claimed in claim 12, this first support portion housing connecting portion backlight that stretches out wherein, this housing connecting portion backlight is connected with a upper surface of this housing backlight.
18. backlight module as claimed in claim 17, wherein this housing connecting portion backlight comprises a kink, and this kink is connected with a lateral wall of this housing backlight.
19. backlight module as claimed in claim 12, wherein the top of this first support portion is provided with a fender.
20. backlight module as claimed in claim 12, wherein this optical diffusing plate comprises a diaphragm location division, and this diaphragm location division extends internally from this first support portion, and this diaphragm stretches between this diaphragm location division and this diffuser plate body.
21. backlight module as claimed in claim 20, wherein this diaphragm location division is bent inwards by first support portion and forms.
22. backlight module as claimed in claim 12, wherein this first end and this second end are the subtend settings, and this optical diffusing plate comprises:
One the 3rd support portion; And
One the 4th support portion;
Wherein this diffuser plate body comprises one the 3rd end and one the 4th end that subtend is provided with; The 3rd support portion and the 4th support portion are arranged at the side of this diffuser plate body corresponding to the 3rd end and the 4th end respectively, and extend towards the direction away from this exiting surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100748889A CN100399065C (en) | 2006-04-25 | 2006-04-25 | Optical diffusion plate and backlight module using the optical diffusion plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100748889A CN100399065C (en) | 2006-04-25 | 2006-04-25 | Optical diffusion plate and backlight module using the optical diffusion plate |
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| Publication Number | Publication Date |
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| CN1831570A CN1831570A (en) | 2006-09-13 |
| CN100399065C true CN100399065C (en) | 2008-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2006100748889A Active CN100399065C (en) | 2006-04-25 | 2006-04-25 | Optical diffusion plate and backlight module using the optical diffusion plate |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI403799B (en) * | 2007-03-20 | 2013-08-01 | Au Optronics Corp | Backlight module |
| CN101377588B (en) * | 2007-08-27 | 2012-06-20 | 奇美电子股份有限公司 | Backlight module and diffusing plate thereof, and planar display using the same |
| WO2013078734A1 (en) * | 2011-12-01 | 2013-06-06 | 青岛海信信芯科技有限公司 | Backlight module and television set |
| CN108254971B (en) * | 2018-01-31 | 2020-09-04 | Oppo广东移动通信有限公司 | Backlight module, electronic device and installation method of backlight module |
| CN108254972B (en) * | 2018-01-31 | 2020-07-03 | Oppo广东移动通信有限公司 | Backlight module, electronic device and installation method of backlight module |
| CN109031744A (en) * | 2018-08-30 | 2018-12-18 | 深圳市华星光电技术有限公司 | Backlight module and the display device for using the backlight module |
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| US20050041411A1 (en) * | 2003-08-20 | 2005-02-24 | Chih-Kang Wu | [back light module] |
| CN1591129A (en) * | 2003-09-01 | 2005-03-09 | 友达光电股份有限公司 | Supporting diffusion plate |
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| JPH04336527A (en) * | 1991-05-14 | 1992-11-24 | Seiko Epson Corp | Liquid crystal display device |
| JPH05257128A (en) * | 1992-03-12 | 1993-10-08 | Hitachi Ltd | Liquid crystal display device |
| JP2001075490A (en) * | 1999-09-02 | 2001-03-23 | Sharp Corp | Holder for liquid crystal panel and liquid crystal display device using same |
| JP2004186080A (en) * | 2002-12-05 | 2004-07-02 | Tama Electric Co Ltd | Backlight device |
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| CN1831570A (en) | 2006-09-13 |
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