CN201583765U

CN201583765U - Lcd

Info

Publication number: CN201583765U
Application number: CN2009203057665U
Authority: CN
Inventors: 黄建日; 孙晓平; 朱燕林
Original assignee: Tianma Microelectronics Co Ltd
Current assignee: Tianma Microelectronics Co Ltd
Priority date: 2009-07-07
Filing date: 2009-07-07
Publication date: 2010-09-15
Anticipated expiration: 2019-07-07

Abstract

The utility model provides an LCD which comprises an LCD panel, a main flexible circuit board attached on the LCD panel and at least an LED light source; and the surface of the main flexible circuit board is provided with at least an LED driving circuit used for driving the LED light source. The LCD has the advantages of high yield and simple procedure.

Description

LCD

Technical field

The utility model relates to a kind of LCD, relates in particular to a kind of LCD that adopts led light source.

Background technology

Because it is low that led light source has energy consumption, therefore the advantage that luminescence efficiency is high more and more is used as Backlight For Liquid Crystal Display Panels.

See also Fig. 1, its be a kind of prior art employing LED-backlit source of disclosing LCD perspective exploded view.This LCD 10 comprises that a display panels 11, is attached at main flexible PCB 12, a blooming piece 13, a light guide plate 14, a reflector plate 15, three led light sources 16, a led drive circuit plate 17 and a framework 18 of this display panels 11.This light guide plate 14 comprises an incidence surface 141, and incidence surface 141 1 sides of this light guide plate 14 are provided with three depressed parts 142 that are used to hold this led light source 16.These led drive circuit plate 17 surfaces are provided with three led drive circuits 171, and comprise one first connecting portion 172.This main flexible PCB 12 comprises one second connecting portion 122, is used for welding with first connecting portion 172.

Again please be simultaneously with reference to Fig. 2 and Fig. 3, wherein Fig. 2 is the schematic perspective view after LCD 10 assemblings shown in Figure 1, Fig. 3 is the diagrammatic cross-section along III-III line among Fig. 2.After the assembling, this framework 18 is accommodated this reflector plate 15, this light guide plate 14, this blooming piece 13 and this display panels 11 that is cascading.These led light source 16 correspondences are arranged at the depressed part 142 of this light guide plate 14, and are provided with respect to this incidence surface 141.This led drive circuit plate 17 is arranged between this reflector plate 15 and this light guide plate 14, and makes this led drive circuit 171 be close to this led light source 16, and this first connecting portion 172 is soldered to second connecting portion 122 of this main flexible PCB 12.This main flexible PCB 12 is bent between this reflector plate 15 and this framework 18, and stretches out from the back side of this framework 18.

Yet, in the process of assembling, owing to need and to be bent between this reflector plate 15 and this framework 18 by main flexible PCB 12, making weld between this first connecting portion 172 and this second connecting portion 122 be easy to generate stress concentrates, cause sealing-off and make led light source not drive, and then make the yield of this LCD 10 reduce.

The utility model content

The purpose of this utility model provides a kind of LCD, and it can improve the yield of LCD.

For solving technical matters of the present utility model, the utility model provides a kind of LCD, it comprises that a display panels, is attached at main flexible PCB and at least one led light source of this display panels, and this main flexible PCB is provided with at least one led drive circuit that is used to drive this led light source.

Compared with prior art, in the LCD of the present utility model, led drive circuit directly is arranged at main flexible PCB surface, thereby avoided main flexible PCB and led drive circuit plate to weld, prevented that the product that causes because of the weld sealing-off is bad, improved the yield of LCD.

Description of drawings

Fig. 1 be a kind of prior art LCD exploded perspective view.

Fig. 2 is the synoptic diagram after the LCD assembling among Fig. 1.

Fig. 3 is the diagrammatic cross-section along III-III line among Fig. 2.

Fig. 4 is the perspective exploded view of the LCD of a kind of better embodiment of the utility model.

Fig. 5 is another angle perspective exploded view of LCD among Fig. 4.

Fig. 6 is the schematic perspective view after the LCD assembling among Fig. 4.

Fig. 7 is the diagrammatic cross-section along VII-VII line among Fig. 6.

Embodiment

Please consult Fig. 4 and Fig. 5 simultaneously, Fig. 4 is the perspective exploded view of the LCD of the utility model one embodiment, and Fig. 5 is another angle perspective exploded view of LCD shown in Figure 4.This LCD 20 comprises that a display panels 21, is attached at main flexible PCB 22, a blooming piece 23, a light guide plate 24, a reflector plate 25, three led light sources 26 and a framework 27 of this display panels 21.This light guide plate 24 comprises an incidence surface 241 and a bottom surface 245, and incidence surface 241 1 sides of this light guide plate 24 are provided with three depressed parts 242 that are used to hold this led light source 26, and the bottom surface 245 of this light guide plate 24 is provided with two reference columns 243.This main flexible PCB 22 be provided with three led drive circuits 221 and with this two reference column 243 with respect to 2 first pilot holes 223.This blooming piece 23 can be a diffusion sheet, also can be the blast sheet.One side of this reflector plate 25 is provided with three breach 252 and two second pilot holes 253 corresponding to this reference column 243 corresponding to this depressed part 242.This framework 27 comprises a bottom surface 271 and a back side 272, and this bottom surface 271 is provided with a two-sided adhesive tape 273 near a side of this led light source 26, and on depressed part 242 next doors of closing on this light guide plate 24 one opening 274 is set.

Again please be simultaneously with reference to Fig. 6 and Fig. 7, wherein Fig. 6 is the synoptic diagram after these LCD 20 assemblings, Fig. 7 is the diagrammatic cross-section along VII-VII line among Fig. 6.After the assembling, this reflector plate 25, this light guide plate 24, this blooming piece 23 and this display panels 21 are contained in this framework 27 successively.These led light source 26 correspondences are arranged at the depressed part 242 of light guide plate 24, and are provided with respect to this incidence surface 241.This main flexible PCB 22 fits with this double sticky tape 273, and stretches out from the back side 272 of this framework 18.Two second pilot holes 253 of two first pilot holes 223 of this main flexible PCB 27 and this reflector plate are sheathed on respectively on two reference columns 243 of this light guide plate 24, thereby make led drive circuit 221 and these led light source 26 corresponding applyings on this main flexible PCB 22.

Compared with prior art, in the LCD 20 of the present utility model, led drive circuit 221 is arranged on this main flexible PCB 22, thereby avoided main flexible PCB and led drive circuit plate to weld, prevented that the product that causes because of the weld sealing-off is bad, improved the yield of LCD; Simultaneously, owing to saved this step of welding, thus make processing procedure simpler; In addition, owing to be provided with double sticky tape, make winner's flexible PCB and light guide plate fit tightlyer in the bottom surface of framework.

It below only is preferred embodiment of the present utility model, be not that the utility model is done any pro forma restriction, though the utility model discloses as above with preferred embodiment, yet be not in order to limit the utility model, any those skilled in the art, in not breaking away from the technical solutions of the utility model scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solutions of the utility model, according to technical spirit of the present utility model to any simple modification that above embodiment did, equivalent variations and modification all still belong in the scope of technical solutions of the utility model.

Claims

1. LCD, it comprises that a display panels, is attached at main flexible PCB and at least one led light source of this display panels, it is characterized in that this main flexible PCB surface is provided with at least one led drive circuit that is used to drive this led light source.

2. LCD as claimed in claim 1 is characterized in that, further comprises a light guide plate, and this light guide plate comprises an incidence surface, and this light source is provided with respect to this incidence surface, and this led drive circuit and this led light source fit.

3. LCD as claimed in claim 2, it is characterized in that this light guide plate comprises a bottom surface, its bottom surface is provided with reference column, this reflector plate and this main flexible PCB are respectively equipped with pilot hole, and the pilot hole of this reflector plate and this main flexible PCB correspondence respectively is sheathed on this reference column.

4. LCD as claimed in claim 2 is characterized in that, this light guide plate incidence surface one side is provided with at least one depressed part that is used to hold this led light source.

5. LCD as claimed in claim 4 is characterized in that, further comprises a reflector plate, and it closes on the led light source side and is provided with and the corresponding breach of the depressed part of light guide plate.

6. LCD as claimed in claim 3 is characterized in that, further comprises at least one blooming piece, and it closes on the exiting surface setting of this light guide plate.

7. LCD as claimed in claim 6 is characterized in that, further comprises a framework, and this light guide plate, this blooming piece and this display panels stack gradually and be contained in this framework.