CN100529895C

CN100529895C - Backlight module

Info

Publication number: CN100529895C
Application number: CNB200510101759XA
Authority: CN
Inventors: 舒伟
Original assignee: Innolux Shenzhen Co Ltd; Innolux Display Corp
Current assignee: Innolux Shenzhen Co Ltd; Innolux Corp
Priority date: 2005-11-22
Filing date: 2005-11-22
Publication date: 2009-08-19
Anticipated expiration: 2025-11-22
Also published as: CN1971371A

Abstract

The invention relates to a backlight module pattern assembly that comprises a light source, a light conducting plate and at least one optical membrane, the light conducting plate includes a light-out surface and a light-in surface, the light source is mounted on the side of light-in surface in light conducting plate, the optical membrane is located at the side of light-out surface in light conducting plate, thereinto, the positioning mechanism of the optical membrane is mounted on the light-out surface of the light conducting plate.

Description

Module backlight

[technical field]

The invention relates to a kind of module backlight that is used for LCD.

[background technology]

Because the liquid crystal itself in the panel of LCD is not luminous, thereby, for reaching display effect, need to give the LCD panel that one planar light source device is provided, as module backlight, to realize Presentation Function.

Prior art module backlight comprises light source, light guide plate and framework, light source is the incidence surface setting of relative light guide plate, the transmission direction that the light-guide plate guides light source emits beam, the light that line source or pointolite are transferred turns to the outgoing of uniform in-plane light to illuminate the display panels in the LCD.Framework is used for fixing each assembly of this module backlight.

A kind of module backlight of prior art as shown in Figure 1, this module 1 backlight comprises a glue frame 11, a concentration piece 12, a diffusion sheet 13, a light guide plate 14, a cold cathode fluorescent lamp pipe (Cold Cathode Fluorescent Lamp, CCFL) 15, one lamp tube cover 16, a reflector plate 17 and a chase 18.Wherein, this concentration piece 12 comprises two teats 121, and this two teat 121 is oppositely arranged on concentration piece 12 both sides.This diffusion sheet 13 comprises two teats 131, and this two teat 121 is oppositely arranged on diffusion sheet 13 both sides, and two teats 121 of corresponding concentration piece 12 are provided with.This light guide plate 14 comprises an incidence surface 141.

This cold cathode fluorescent lamp pipe 15 is positioned at incidence surface 141 1 sides of light guide plate 14, and lamp tube cover 16 is around fluorescent tube 15, and this reflector plate 17, light guide plate 14, diffusion sheet 13 and concentration piece 12 are placed in the chase 18 successively.This glue frame 11 and this chase 18 are clasped mutually, and fixedly concentration piece 12 and diffusion sheet 13 do not move it in vertical direction.

See also Fig. 2 and Fig. 3, Fig. 2 is the assembling synoptic diagram of module backlight shown in Figure 1, and Fig. 3 is the enlarged drawing of III part among Fig. 2.In the assembling process of this module 1 backlight for to concentration piece 12 and diffusion sheet 13 positions and fool proof operation, two openings 181 of two teats 131 of two teats 121 of corresponding concentration piece 12 and diffusion sheet 13 are set on the chase 18, and this two opening 181 is oppositely arranged on chase 18 both sides.Each opening 181 comprises two catch 182, and this two catch 182 is oppositely arranged on opening 181 both sides.

When assembling concentration piece 12 and diffusion sheet 13, the teat 121 of concentration piece 12 and the teat 131 of diffusion sheet 13 all fall into corresponding opening 181, and two catch 182 that are oppositely arranged are seized the teat 121 of concentration piece 12 and the teat 131 of diffusion sheet 13 on both sides by the arms, fixedly concentration piece 12 and diffusion sheet 13 do not move in the horizontal direction it.

Yet, in the assembling process of module 1 backlight, for to concentration piece 12 and diffusion sheet 13 positions and fool proof operation, teat 121,131 need be set on concentration piece 12 and the diffusion sheet 13, and also need be provided with on the chase 18 and the opening with catch 182 181 of these teat 121,131 correspondences, these chase 18 designs are complicated, and then the design of entire aphototropism mould 1 is complicated.

[summary of the invention]

For the design of backlight module that overcomes prior art than complicated problems, be necessary to provide a kind of design better simply module backlight.

A kind of module backlight, it comprises a light source, one light guide plate, an at least one blooming piece and a reflector plate, this light guide plate comprises an incidence surface and an exiting surface, this light source is arranged on light guide plate incidence surface side, this blooming piece is positioned at the exiting surface side of light guide plate, wherein, the exiting surface of this light guide plate is provided with the blooming piece detent mechanism, and detent mechanism is arranged on the flange around the light guide plate exiting surface, one flange and the light guide plate exiting surface of contiguous light guide plate incidence surface form a ladder, and this ladder is near this incidence surface one side, and this reflector plate is around this light source, its end places on this ladder, and this ladder positions the attaching of reflector plate.

A kind of module backlight, it comprises a light source, one light guide plate, an at least one blooming piece and a reflector plate, this light guide plate comprises an incidence surface and an exiting surface, this light source is arranged on light guide plate incidence surface side, this blooming piece is positioned at the exiting surface side of light guide plate, wherein, the exiting surface of this light guide plate is provided with the blooming piece detent mechanism, this blooming piece detent mechanism is arranged on the L type flange in light guide plate exiting surface corner, this L type flange comprises two crossing stripe shape flanges, two stripe shape flanges of this incidence surface of vicinity of two L type flanges of contiguous light guide plate incidence surface form a ladder with the light guide plate exiting surface respectively, this ladder is near this incidence surface one side, this reflector plate is around this light source, and its end places on this ladder, and this ladder positions the attaching of reflector plate.

Compared to prior art, because the light guide plate exiting surface of this module backlight is provided with the blooming piece detent mechanism, this blooming piece detent mechanism can position the blooming piece on the light guide plate exiting surface and the fool proof operation, thereby location and fool proof mechanism need not be set on blooming piece and chase, blooming piece and chase design are simpler, and then the design of entire aphototropism mould is also simpler.

[description of drawings]

Fig. 1 is the three-dimensional exploded view of prior art module backlight.

Fig. 2 is the assembling synoptic diagram of module backlight shown in Figure 1.

Fig. 3 is the enlarged drawing of III part among Fig. 2.

Fig. 4 is the three-dimensional exploded view of the present invention's module first embodiment backlight.

Fig. 5 is the assembling synoptic diagram of light guide plate, cold cathode fluorescent lamp pipe and the reflector plate of module backlight shown in Figure 4.

Fig. 6 is the assembling synoptic diagram of module backlight shown in Figure 4.

Fig. 7 is the assembling synoptic diagram of module backlight shown in Figure 4.

Fig. 8 is the schematic perspective view of the light guide plate of the present invention's module second embodiment backlight.

[embodiment]

Seeing also Fig. 4, is the three-dimensional exploded view of first embodiment of the present invention's module backlight.This module 2 backlight comprises a glue frame 21, a concentration piece 22, a diffusion sheet 23, a light guide plate 24, a cold cathode fluorescent lamp pipe 25, a reflector plate 27 and a chase 28.

This light guide plate 24 comprises an incidence surface 241, one and the exiting surface that intersects of this incidence surface 241 242, one and exiting surface 242 opposed bottom surface 243 and and three sides 244 of intersecting, this bottom surface 243.Flange 245 is set around the exiting surface 242 of this light guide plate 24, wherein, one flange 245 of contiguous incidence surface 241 and exiting surface 242 form a ladder 246, and these ladder 246 close these incidence surface 241 1 sides, and the side 244 of the lateral wall of its excess-three flange 245 and light guide plate 24 is same planes.This flange 245 and light guide plate 24 are one-body molded.

This reflector plate 27 has first impression 271 and second impression 272, makes reflector plate 27 along this

first impression

271 and 272 bendings of second impression, and the bending part of reflector plate 27 can center on cold cathode fluorescent lamp pipe 25, serves as lamp tube cover.

This cold cathode fluorescent lamp pipe 25 places incidence surface 241 1 sides of light guide plate 24, and these cold cathode fluorescent lamp pipe 25 emitted lights enter this light guide plate 24 inside through the incidence surface 241 of this light guide plate 24.This diffusion sheet 23 and concentration piece 22 are cascading in exiting surface 242 sides of light guide plate 24, by the diffusion of diffusion sheet 23 and the optically focused effect of concentration piece 22, to improve the quality of output light.This reflector plate 27 is arranged on bottom surface 243 1 sides of light guide plate 24, therefore, can be reentered through the reflection of reflector plate 27 by the light of bottom surface 243 outgoing of light guide plate 24 and to be mapped to light guide plate 24 inside.

See also Fig. 5, Fig. 5 is the assembling synoptic diagram of light guide plate, cold cathode fluorescent lamp pipe and the reflector plate of module backlight shown in Figure 4.In the assembling process of module 2 backlight, at first assemble light guide plate 24, cold cathode fluorescent lamp pipe 25 and reflector plate 27.

Reflector plate 27 location is attached to the bottom surface 243 of light guide plate 24, at this moment, reflector plate 27 have first impression 271 and second impression 272 part can extend bottom surface 243.Reflector plate 27 is bent along this first impression 271, and cold cathode fluorescent lamp pipe 25 placed on the reflector plate 27 that is extended by bottom surface 243, again reflector plate 27 is bent along this second impression 272, the bending part that makes reflector plate 27 is around cold cathode fluorescent lamp pipe 25, at last the end of vicinity second impression 272 of reflector plate 27 is placed on the ladder 246 that flange 245 and exiting surface 242 form, and attach.

Because of the flange 245 and exiting surface 242 formation one ladder 246 of light guide plate 24, the attaching of 246 pairs of reflector plates 27 of this ladder positions.

Seeing also Fig. 6 and Fig. 7, is the assembling synoptic diagram of module backlight shown in Figure 4.The light guide plate 24, cold cathode fluorescent lamp pipe 25 and the reflector plate 27 that assemble are placed in the chase 28, and diffusion sheet 23 and concentration piece 22 are placed in the receiving space that four flanges 245 on the exiting surface 242 of light guide plate 24 surround, buckle glue frame 21 at last, this glue frame 21 and this chase 28 are clasped mutually and finish the assembling of module 2 backlight.

Four flanges 245 on the exiting surface 242 of this light guide plate 24 surround a receiving space, are used for the blooming piece on the exiting surface 242 is positioned and the fool proof operation, and it is not moved in the horizontal direction.

Seeing also Fig. 8, is the schematic perspective view of the light guide plate of the present invention's module second embodiment backlight.The light guide plate 24 that is different from the module backlight 2 of first embodiment, four corners of the exiting surface 842 of this light guide plate 84 are provided with L type flange 845, and each L type flange 845 comprises two bar shaped flanges 8451.Wherein, two bar shaped flanges 8451 of this incidence surface 841 of vicinity of two L type flanges 845 of contiguous incidence surface 841 form a ladder 846 with exiting surface 842 respectively, and this ladder 846 is near these incidence surface 841 1 sides, and the side 844 of the lateral wall of all the other flanges 845 and light guide plate 84 is same planes.

Four L type flanges 845 on the exiting surface 842 of this light guide plate 84 surround a receiving space, are used for the blooming piece on the exiting surface 842 is positioned and the fool proof operation, and it is not moved in the horizontal direction.

Claims

1. module backlight, it comprises a light source, one light guide plate, an at least one blooming piece and a reflector plate, this light guide plate comprises an incidence surface and an exiting surface, this light source is arranged on light guide plate incidence surface side, this blooming piece is positioned at the exiting surface side of light guide plate, wherein, the exiting surface of this light guide plate is provided with the blooming piece detent mechanism, and detent mechanism is arranged on the flange around the light guide plate exiting surface, it is characterized in that: a flange and the light guide plate exiting surface of contiguous light guide plate incidence surface form a ladder, and this ladder is near this incidence surface one side, and this reflector plate is around this light source, its end places on this ladder, and this ladder positions the attaching of reflector plate.

2. module backlight as claimed in claim 1 is characterized in that: this light guide plate further comprises three sides of intersecting with exiting surface.

3. module backlight as claimed in claim 2 is characterized in that: the lateral wall of three flanges of contiguous light guide plate side is same plane with the side of correspondence respectively.

4. module backlight as claimed in claim 1 is characterized in that: this reflector plate has first impression and second impression, and the end of contiguous second impression of this reflector plate places on this ladder.

5. module backlight as claimed in claim 1 is characterized in that: this blooming piece detent mechanism and this light guide plate are one-body molded.

6. module backlight, it comprises a light source, one light guide plate, an at least one blooming piece and a reflector plate, this light guide plate comprises an incidence surface and an exiting surface, this light source is arranged on light guide plate incidence surface side, this blooming piece is positioned at the exiting surface side of light guide plate, wherein, the exiting surface of this light guide plate is provided with the blooming piece detent mechanism, this blooming piece detent mechanism is arranged on the L type flange in light guide plate exiting surface corner, it is characterized in that: this L type flange comprises two crossing stripe shape flanges, two stripe shape flanges of this incidence surface of vicinity of two L type flanges of contiguous light guide plate incidence surface form a ladder with the light guide plate exiting surface respectively, this ladder is near this incidence surface one side, this reflector plate is around this light source, and its end places on this ladder, and this ladder positions the attaching of reflector plate.

7. module backlight as claimed in claim 6 is characterized in that: this reflector plate has first impression and second impression, and the end of contiguous second impression of this reflector plate places on this ladder.

8. module backlight as claimed in claim 6 is characterized in that: the lateral wall of three flanges of contiguous light guide plate side is same plane with the side of correspondence respectively.

9. module backlight as claimed in claim 6 is characterized in that: this blooming piece detent mechanism and this light guide plate are one-body molded.