CN101358713A - Directly-down back light module unit and LCD using the directly-down back light module unit - Google Patents

Directly-down back light module unit and LCD using the directly-down back light module unit Download PDF

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Publication number
CN101358713A
CN101358713A CNA2007101413355A CN200710141335A CN101358713A CN 101358713 A CN101358713 A CN 101358713A CN A2007101413355 A CNA2007101413355 A CN A2007101413355A CN 200710141335 A CN200710141335 A CN 200710141335A CN 101358713 A CN101358713 A CN 101358713A
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China
Prior art keywords
lamp box
reflector plate
disposed
mode set
down straight
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CNA2007101413355A
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Chinese (zh)
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CN101358713B (en
Inventor
陈炜森
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Chi Mei Optoelectronics Corp
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Chi Mei Optoelectronics Corp
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Abstract

The invention discloses a direct type back light module and an LCD which applies the direct type back light module. The direct type back light module includes a lamphouse, an optical membrane set, a plurality of light sources, a shaping reflector plate and a plurality of locating parts; wherein, the lamphouse is provided with a cut; while the optical membrane set is arranged between the light sources and the bottom part of the lamphouse. The shaping reflector plate is provided with a plurality of reflection inclines; besides, the light sources are respectively arranged between two neighboring reflection inclines. The locating parts are arranged on the bottom part of the lamphouse so as to independently locate the reflection inclines. The shaping reflector plate can reflect the beam emitting to the bottom part of the lamphouse, thereby being capable of further improving the uniformity of the beam provided by the direct type back light module and having better reliability. The display quality of the LCD can be improved.

Description

Down straight aphototropism mode set and the LCD of using this down straight aphototropism mode set
Technical field
The invention relates to a kind of light-emitting component and display unit, and particularly relevant for a kind of down straight aphototropism mode set and the LCD of using this down straight aphototropism mode set.
Background technology
In general LCD, usually comprise the assembly that colour display screen of the same colour shows function, for example be display panels (Liquid crystal display panel), because display panels does not have luminous function, so below display panels, must dispose a module backlight so that an area source to be provided, so that display panels can reach the purpose of demonstration.
Fig. 1 is the generalized section of existing module backlight.Please refer to Fig. 1, existing module 100 backlight is made of a lamp box 110, a plurality of light source 120, a diffusion sheet 130 and a reflector plate 140.Wherein, light source 120 is disposed in the lamp box 110, and diffusion sheet 130 is disposed at the opening 110a place of lamp box 110.In general, reflector plate 140 all is on the bottom surface that directly is disposed in the lamp box 110, and the part light that light source 120 provided can be directly by the diffusion sheet 130 of top outgoing to extraneous, and the light of part directive lamp box 110 bottom surfaces can penetration sheet 140 and reflecting, and the outgoing by diffusion sheet 130 at last so just can promote the utilization rate of light.
What merit attention is, because reflector plate 140 directly is positioned on the bottom surface in the lamp box 110, therefore module 100 backlight makes reflector plate 140 produce displacement because of the collision of external force or by coming off on the bottom surface probably.This can to the reliability of module 100 backlight with and the optical characteristics that presented cause and seriously influence.
In addition, light source 120 all is spot light or line source usually.The brightness irregularities that this is easy to cause module 100 backlight because of the number or the misarrangement of light source 120 module 100 backlight to be presented.Though above-mentioned reflector plate 140 can promote the utilization rate of light, for the uniformity poor effect that promotes brightness that module 100 backlight presents.
Summary of the invention
The purpose of this invention is to provide a kind of down straight aphototropism mode set, to solve not good and its problem such as brightness irregularities that presented of existing module reliability backlight.
Another object of the present invention provides a kind of LCD, and it can use above-mentioned down straight aphototropism mode set, so that better display quality and product yield to be provided.
For reaching above-mentioned or other purposes, the present invention proposes a kind of down straight aphototropism mode set, and it comprises a lamp box, an optical diaphragm group, a plurality of light source, a moulding reflector plate and a plurality of keeper.Wherein, lamp box has an opening, and optical diaphragm group is disposed at opening part.In addition, light source is disposed in the lamp box, and the moulding reflector plate is disposed between light source and the lamp box bottom.This moulding reflector plate has a plurality of reflecting slant, and light source lays respectively between the two adjacent reflecting slant.Above-mentioned keeper is disposed at the lamp box bottom, and difference breasting reflecting slant is with respect to the opposite side of light source, with the location reflecting slant.
In the present invention, above-mentioned keeper can be a sheet.
In the present invention, above-mentioned keeper and the lamp box bottom structure that can be formed in one.
In the present invention, above-mentioned keeper can be formed by lamp box bottom punch forming.
In the present invention, above-mentioned reflecting slant can be the strip inclined-plane.
In the present invention, above-mentioned strip inclined-plane can constitute chevron or trapezoidal.
In the present invention, above-mentioned down straight aphototropism mode set more comprises at least one alignment pin, and it is disposed at the lamp box bottom, and passes the moulding reflector plate.
In the present invention, above-mentioned alignment pin can have one first positioning convex and one second positioning convex, in order to clamping moulding reflector plate.
In the present invention, above-mentioned alignment pin comprises a base and an external member.Wherein, base is disposed at lamp box bottom, and the top of base has a projection and passes the moulding reflector plate.In addition, external member is placed on the projection of base top, and with the common clamping moulding of base reflector plate.
In the present invention, above-mentioned alignment pin can be attached to the lamp box bottom by screw.
In the present invention, above-mentioned optical diaphragm group can comprise diffusion sheet, brightening piece and prismatic lens at least one of them.
In the present invention, above-mentioned down straight aphototropism mode set more comprises an adhesive tape, and it is disposed between moulding reflector plate and the lamp box bottom.
The invention provides a kind of display panels, it comprises an above-mentioned down straight aphototropism mode set and a display panels.Wherein, display panels is disposed at by the down straight aphototropism mode set corresponding to the opening of lamp box.
The invention provides a kind of down straight aphototropism mode set, comprise a lamp box, an optical diaphragm group, a plurality of light source, a moulding reflector plate and at least one alignment pin.Wherein, lamp box has an opening, and optical diaphragm group is disposed at opening part.In addition, light source is disposed in the lamp box, and the moulding reflector plate is disposed between light source and the lamp box bottom.Above-mentioned moulding reflector plate has a plurality of reflecting slant, and light source lays respectively between the two adjacent reflecting slant.In addition, alignment pin is disposed at the lamp box bottom, and passes the moulding reflector plate.In addition, alignment pin comprises a base and an external member.Wherein, base is disposed at lamp box bottom, and the top of base has a projection and pass the moulding reflector plate, and external member is placed on the projection of base top, and with the common clamping moulding of base reflector plate.
In the present invention, above-mentioned reflecting slant can be the strip inclined-plane.
In the present invention, above-mentioned strip inclined-plane can constitute chevron or trapezoidal.
In the present invention, the side of above-mentioned alignment pin can have one first positioning convex and one second positioning convex, in order to clamping moulding reflector plate.
In the present invention, above-mentioned alignment pin can be attached to the lamp box bottom by screw.
In the present invention, above-mentioned optical diaphragm group can comprise diffusion sheet, brightening piece and prismatic lens at least one of them.
In the present invention, above-mentioned down straight aphototropism mode set more comprises an adhesive tape, and it is disposed between moulding reflector plate and the lamp box bottom.
The invention provides a kind of LCD, it comprises above-mentionedly only alignment pin being arranged and do not have the down straight aphototropism mode set and a display panels of keeper.Wherein, display panels is disposed at by the down straight aphototropism mode set corresponding to the opening of lamp box.
Because of the moulding reflector plate is arranged, and the moulding reflector plate has a plurality of reflecting slant between the bottom of down straight aphototropism mode set of the present invention and the light source.Therefore, the moulding reflector plate can be with the light reflection of directive lamp box bottom, and reflecting slant can be with the uniform scattering of light, and then can promote the uniformity of light that down straight aphototropism mode set provides.In addition, the moulding reflector plate can by keeper or alignment pin at least one of them and firmly be positioned in the lamp box, therefore down straight aphototropism mode set of the present invention has good reliability.Module backlight of the present invention also can provide more uniform light to display panels, to promote the display quality of LCD.
Description of drawings
For above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, preferred embodiment cited below particularly, and cooperate appended graphicly, be described in detail below.
Fig. 1 is the generalized section of existing module backlight.
Fig. 2 is a kind of down straight aphototropism mode set generalized section according to the first embodiment of the present invention.
Fig. 3 is the moulding reflector plate schematic diagram according to first embodiment.
Fig. 4 is the alignment pin enlarged diagram according to first embodiment.
Fig. 5 is the down straight aphototropism mode set schematic diagram according to second embodiment.
Fig. 6 is the schematic diagram according to the LCD of the third embodiment of the present invention.
Fig. 7 is the schematic diagram according to the another kind of LCD of the third embodiment of the present invention.
The main element symbol description is as follows among the figure:
100: module backlight
110,210,211: lamp box
110a, 210a, 211a: opening
120,220: light source
130: diffusion sheet
140: reflector plate
200,300: down straight aphototropism mode set
210b: keeper
230: optical diaphragm group
240: the moulding reflector plate
240a: reflecting slant
250: alignment pin
252: base
252a: projection
252b: first positioning convex
254: external member
254a: second positioning convex
256: screw
260: adhesive tape
400: display panels
500,600: LCD
The specific embodiment
First embodiment
Fig. 2 is a kind of down straight aphototropism mode set generalized section according to the first embodiment of the present invention.Please refer to Fig. 2, down straight aphototropism mode set 200 of the present invention comprises a lamp box 210, a plurality of light source 220, an optical diaphragm group 230, a moulding reflector plate 240 and a plurality of keeper 210b.Wherein, lamp box 210 has an opening 210a, and light source 220 is disposed in the lamp box 210, and optical diaphragm group 230 is disposed at opening 210a place.
Generally speaking, optical diaphragm group 230 can comprise diffusion sheet (Diffuser film), brightening piece (Brightness enhanced film, BEF) with prismatic lens (Prism sheet) at least one of them, the light scattering more equably that above-mentioned diffusion sheet can make light source 220 be sent, and brightening piece can promote the brightness that down straight aphototropism mode set 200 is presented.In addition, prismatic lens can promote the correctness of beam projecting direction.Down straight aphototropism mode set 200 of the present invention can according to the optical effect desiring to present and select above-mentioned blooming piece for use.
As shown in Figure 2, moulding reflector plate 240 is disposed between light source 220 and lamp box 210 bottoms.What will specify here is, has a plurality of reflecting slant 240a on the moulding reflector plate 240, and this three-dimensional reflecting slant 240a can be the strip inclined-plane.Fig. 3 is the moulding reflector plate schematic diagram according to first embodiment.Please refer to Fig. 3, the strip inclined-plane of moulding reflector plate 240 of the present invention can constitute chevron or trapezoidal, and for example a is a chevron among Fig. 3, and b is trapezoidal.Can certainly be other three-dimensional shapes, and this do not limited to.
Particularly, above-mentioned light source 220 lays respectively between the reflecting slant 240a of two adjacent solids.Generally speaking, light source 220 can for the cold cathode fluorescent lamp pipe (Cold cathodefluorescent lamp, CCFL) or light emitting diode (LED).If with the cold cathode fluorescent lamp pipe as light source 220, because the more directionless centrality of light that the cold cathode fluorescent lamp pipe is sent, therefore the part light emitted towards lamp box 210 bottoms can be by 240 reflections of moulding reflector plate, and, so just can promote the utilization rate of light at last from optical diaphragm group 230 outgoing of top.What merit attention is that reflecting slant 240a has the strip inclined-plane of chevron (trapezoidal or other three-dimensional shapes).Therefore, the light source 220 between two adjacent reflecting slant 240a, the light that it sent can be gone out toward lateral scattering equably by reflecting slant 240a.
If as light source 220, then can select for use side emitting type light emitting diode (Side emitting type LED), because the light major part that side emitting type light emitting diode is sent concentrates on side direction as light source 220 with light emitting diode.Therefore, light source 220 sends most light and can scatter out equably by the reflecting slant 240a that is positioned at light source 220 both sides solids, and the uniformity of the light that provides of down straight aphototropism mode set 200 of the present invention further is provided.
In addition, above-mentioned keeper 210b is disposed at lamp box 210 bottoms, and the side of reflecting slant 240a back to light source 220 lived in breasting respectively.So, keeper 210b can fix moulding reflector plate 240, be shifted to avoid moulding reflector plate 240, and then the optical characteristics that whole down straight aphototropism mode set 200 is presented impacts.In detail, keeper 210b can be sheet or other shapes, and certainly, the profile of keeper 210b is looked closely the profile of moulding reflector plate 240 and decided, as long as keeper 210b can with moulding reflector plate 240 positioning instants can, profile and the number of keeper 210b are not limited at this.
What merit attention is, the profile that keeper 210b can corresponding moulding reflector plate 240, and see through that 210 bottom punch formings form to lamp box.In other words, keeper 210b and the lamp box 210 bottoms structure that can be formed in one.So, no matter the moulding reflector plate 240 of which kind of three-dimensional shape can both be positioned part 210b located and fixed in the bottom of lamp box 210.For the bottom that is positioned lamp box 210 of guaranteeing that further moulding reflector plate 240 can be firm, down straight aphototropism mode set 200 of the present invention can also comprise at least one alignment pin 250.This alignment pin 250 is disposed at lamp box 210 bottoms, and passes moulding reflector plate 240, further to fix moulding reflector plate 240.
Fig. 4 is the alignment pin enlarged diagram according to first embodiment.Please refer to Fig. 4, alignment pin 250 comprises a base 252 and an external member 254.Wherein, base 252 is disposed at lamp box 210 bottoms, and the top of base 252 has the projection 252a that passes moulding reflector plate 240.In addition, external member 254 is sheathed on the projection 252a at base 252 tops, and with base 252 common clamping moulding reflector plates 240.Above-mentioned base 252 can be attached to lamp box 210 bottoms or see through the mode that engages and be fixed in lamp box 210 bottoms by screw 256.In addition, alignment pin 250 can have one first positioning convex 252b and one second positioning convex 254a, sees through the contact area that increases alignment pin 250 and moulding reflector plate 240, and then makes base 252 and external member 254 clamping moulding more firmly reflector plate 240.
Certainly, down straight aphototropism mode set 200 of the present invention can also comprise an adhesive tape 260, and it is disposed between moulding reflector plate 240 and lamp box 210 bottoms, in case major structure type reflector plate 240 is come off by the bottom of lamp box 210.Thus, the reliability of down straight aphototropism mode set 200 of the present invention just can significantly promote.
Second embodiment
The present embodiment and first embodiment are very similar, and both are the main difference part: the down straight aphototropism mode set of present embodiment is to fix the moulding reflector plate and do not use alignment pin with keeper.Fig. 5 is the down straight aphototropism mode set schematic diagram according to second embodiment.Please refer to Fig. 5, down straight aphototropism mode set 300 of the present invention comprises a lamp box 210, a plurality of light source 220, an optical diaphragm group 230 and a moulding reflector plate 240.Wherein, lamp box 211 has an opening 211a, and light source 220 is disposed in the lamp box 211.
In addition, optical diaphragm group 230 is disposed at opening 211a place, and moulding reflector plate 240 is disposed between light source 220 and lamp box 211 bottoms.Above-mentioned moulding reflector plate 240 has a plurality of reflecting slant 240a, and light source 220 lays respectively between the wantonly two adjacent reflecting slant 240a.What merit attention is be formed with keeper 210b on the bottom of lamp box 210, and the side of reflecting slant 240a back to light source 220 to be lived in breasting respectively.So, keeper 210b can fix moulding reflector plate 240, be shifted to avoid moulding reflector plate 240, and then the optical characteristics that whole down straight aphototropism mode set 300 is presented impacts.What merit attention is, the profile that keeper 210b can corresponding moulding reflector plate 240, and see through that 210 bottom punch formings form to lamp box.Change speech, structure that keeper 210b and lamp box 210 bottoms can be formed in one.So, part 210b is positioned the bottom of lamp box 210 accurately and quickly no matter the moulding reflector plate 240 of which kind of three-dimensional shape can both be positioned.
The 3rd embodiment
Fig. 6 is the schematic diagram according to the LCD of the third embodiment of the present invention.Please refer to Fig. 6, LCD 500 of the present invention comprises an above-mentioned down straight aphototropism mode set 200 and a display panels 400.Wherein, the structure of down straight aphototropism mode set 200 is clear to be exposed among first embodiment, and display panels 400 is disposed at down straight aphototropism mode set 200 sides corresponding to the opening 210a of lamp box 210.
Please refer to Fig. 7, display panels 400 of the present invention also can be arranged in pairs or groups down straight aphototropism mode set 300 and be formed a LCD 600.Wherein, the structure of module 300 backlight is clear to be exposed among second embodiment, and display panels 400 is disposed at down straight aphototropism mode set 300 sides corresponding to the opening 211a of lamp box 211.Above-mentioned LCD 500 and 600 can be respectively by down straight aphototropism mode set 200 of the present invention and 300 and have preferable optical display properties.
In sum, because of the moulding reflector plate is arranged, and on the moulding reflector plate reflecting slant is arranged between the bottom of down straight aphototropism mode set of the present invention and the light source.Therefore, the light of directive lamp box bottom can be by reflecting slant and scattering equably, the last outgoing by the optical diaphragm group of top.Therefore, down straight aphototropism mode set of the present invention can provide the uniformity preferable light, and then makes LCD of the present invention that the good optical display characteristic be arranged.In addition, the moulding reflector plate with three-dimensional reflecting slant can see through keeper or alignment pin at least one of them and firmly be positioned in the lamp box, therefore down straight aphototropism mode set of the present invention has good reliability.In addition, when assembling moulding reflector plate,, and have bit function owing to the profile of keeper of the present invention for corresponding moulding reflector plate designs.Therefore, the moulding reflector plate can accurately and efficiently be positioned the lamp box bottom by keeper, effectively to avoid the displacement of moulding reflector plate.Therefore, down straight aphototropism mode set of the present invention can provide quality good light source.
Though the present invention discloses as above with preferred embodiment; right its is not in order to qualification the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when can doing a little change and retouching, so protection scope of the present invention is with being as the criterion that claims scope is defined.

Claims (28)

1. a down straight aphototropism mode set is characterized in that, comprising:
One lamp box has an opening;
A plurality of light sources are disposed in the described lamp box;
One optical diaphragm group is disposed at described opening part;
One moulding reflector plate is disposed between described each light source and the described lamp box bottom, and wherein said moulding reflector plate has a plurality of reflecting slant, and described each light source lays respectively between the two adjacent reflecting slant; And
A plurality of keepers are disposed at described lamp box bottom, to locate described each reflecting slant respectively.
2. down straight aphototropism mode set as claimed in claim 1 is characterized in that, described each keeper slabbing.
3. down straight aphototropism mode set as claimed in claim 1 is characterized in that, the structure that described each keeper and described lamp box bottom are formed in one.
4. down straight aphototropism mode set as claimed in claim 3 is characterized in that, described each keeper is to be formed by described lamp box bottom punch forming.
5. down straight aphototropism mode set as claimed in claim 1 is characterized in that, described each reflecting slant is the strip inclined-plane.
6. down straight aphototropism mode set as claimed in claim 5 is characterized in that, described each strip inclined-plane is chevron or trapezoidal.
7. down straight aphototropism mode set as claimed in claim 1 is characterized in that, also comprises at least one alignment pin, is disposed at described lamp box bottom, and passes described moulding reflector plate.
8. down straight aphototropism mode set as claimed in claim 7 is characterized in that, described alignment pin has one first positioning convex and one second positioning convex, in order to the described moulding reflector plate of clamping.
9. down straight aphototropism mode set as claimed in claim 7 is characterized in that, described alignment pin comprises:
One base is disposed at described lamp box bottom, and the top of described base has a projection and passes described moulding reflector plate; And
One external member is placed on the described projection of described base top, and with the described moulding reflector plate of the common clamping of described base.
10. down straight aphototropism mode set as claimed in claim 7 is characterized in that, described alignment pin is to be attached to described lamp box bottom by screw.
11. down straight aphototropism mode set as claimed in claim 1 is characterized in that, also comprises an adhesive tape, is disposed between described moulding reflector plate and the described lamp box bottom.
12. a down straight aphototropism mode set is characterized in that, comprising:
One lamp box has an opening;
A plurality of light sources are disposed in the described lamp box;
One optical diaphragm group is disposed at described opening part; And
One moulding reflector plate is disposed between described each light source and the described lamp box bottom, and wherein said moulding reflector plate has a plurality of reflecting slant, and described each light source lays respectively between the two adjacent reflecting slant;
At least one alignment pin is disposed at described lamp box bottom, and passes described moulding reflector plate, and described alignment pin comprises:
One base is disposed at described lamp box bottom, and the top of described base has a projection and passes described moulding reflector plate; And
One external member is placed on the described projection of described base top, and with the described moulding reflector plate of the common clamping of described base.
13. down straight aphototropism mode set as claimed in claim 12 is characterized in that, described each reflecting slant is the strip inclined-plane.
14. down straight aphototropism mode set as claimed in claim 13 is characterized in that, described each strip inclined-plane is chevron or trapezoidal.
15. down straight aphototropism mode set as claimed in claim 12 is characterized in that, described alignment pin has one first positioning convex and one second positioning convex, in order to the described moulding reflector plate of clamping.
16. down straight aphototropism mode set as claimed in claim 12 is characterized in that, described alignment pin is to be attached to described lamp box bottom by screw.
17. down straight aphototropism mode set as claimed in claim 12 is characterized in that, also comprises an adhesive tape, is disposed between described moulding reflector plate and the described lamp box bottom.
18. a LCD is characterized in that, comprising:
One direct-type backlight module comprises:
One lamp box has an opening;
A plurality of light sources are disposed in the described lamp box;
One optical diaphragm group is disposed at described opening part;
One moulding reflector plate is disposed between described each light source and the described lamp box bottom, and wherein said moulding reflector plate has a plurality of reflecting slant, and described each light source lays respectively between the two adjacent reflecting slant;
A plurality of keepers are disposed at described lamp box bottom, to locate described each reflecting slant; And
One display panels is disposed at corresponding to the described opening of described lamp box by the described down straight aphototropism mode set.
19. LCD as claimed in claim 18 is characterized in that, described each keeper slabbing.
20. LCD as claimed in claim 18 is characterized in that, described each reflecting slant is the strip inclined-plane.
21. LCD as claimed in claim 20 is characterized in that, described each strip inclined-plane is chevron or trapezoidal.
22. LCD as claimed in claim 18 is characterized in that, also comprises an adhesive tape, is disposed between described moulding reflector plate and the described lamp box bottom.
23. a LCD is characterized in that, comprising:
A kind of down straight aphototropism mode set comprises:
One lamp box has an opening;
A plurality of light sources are disposed in the described lamp box;
One optical diaphragm group is disposed at described opening part; And
One moulding reflector plate is disposed between described each light source and the described lamp box bottom, and wherein said moulding reflector plate has a plurality of reflecting slant, and described each light source lays respectively between the two adjacent reflecting slant;
At least one alignment pin is disposed at described lamp box bottom, and passes described moulding reflector plate, and described alignment pin comprises:
One base is disposed at described lamp box bottom, and the top of described base has a projection and passes described moulding reflector plate;
One external member is placed on the described projection of described base top, and with the described moulding reflector plate of the common clamping of described base; And
One display panels is disposed at corresponding to the described opening of described lamp box by the down straight aphototropism mode set.
24. LCD as claimed in claim 23 is characterized in that, described each reflecting slant is the strip inclined-plane.
25. LCD as claimed in claim 24 is characterized in that, described each strip inclined-plane is chevron or trapezoidal.
26. LCD as claimed in claim 23 is characterized in that, described alignment pin has one first positioning convex and one second positioning convex, in order to the described moulding reflector plate of clamping.
27. LCD as claimed in claim 23 is characterized in that, described alignment pin is to be attached to described lamp box bottom by screw.
28. LCD as claimed in claim 23 is characterized in that, also comprises an adhesive tape, is disposed between described moulding reflector plate and the described lamp box bottom.
CN200710141335.5A 2007-08-01 2007-08-01 Directly-down back light module unit and LCD using the directly-down back light module unit Expired - Fee Related CN101358713B (en)

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