CN100403111C - Back light module and liquid crystal dispalying apparatus - Google Patents
Back light module and liquid crystal dispalying apparatus Download PDFInfo
- Publication number
- CN100403111C CN100403111C CNB2004100774884A CN200410077488A CN100403111C CN 100403111 C CN100403111 C CN 100403111C CN B2004100774884 A CNB2004100774884 A CN B2004100774884A CN 200410077488 A CN200410077488 A CN 200410077488A CN 100403111 C CN100403111 C CN 100403111C
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- light
- framework
- light guide
- guide plate
- circuit board
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Abstract
The present invention relates to a liquid crystal display device, which comprises a backlight module and a liquid crystal display panel arranged above the backlight module, wherein the backlight module comprises a frame, a light guide board and a circuit board; the light guide board is arranged in the frame and provided with a light incident surface; the circuit board is provided with a light emitting element which is arranged between the frame and the light incident surface of the light guide surface; an elastic member is arranged on the frame and causes the light emitting element to be butted with the light incident surface of the light guide plate. The liquid crystal display device of the present invention has high and homogeneous light exit brightness.
Description
[technical field]
The invention relates to a kind of liquid crystal indicator, particularly about a kind of module backlight and the liquid crystal indicator that adopts this module backlight.
[background technology]
Liquid crystal indicator generally includes display panels, module backlight and is used for the framework of this display panels of fixing and module backlight.
A kind of liquid crystal indicator of prior art is exposed in No. the 220th, 510, the TaiWan, China patent of on August 21st, 2004 bulletin.With reference to Fig. 1, this liquid crystal indicator 300 comprises a flexible circuit board (Flexible Printed Circuit Board, FPC) 310, one display panels 320, a framework 330, two light-emitting components 340 and light guide plate 400.
This flexible circuit board 310 is connected with this display panels 320, and comprises that a main circuit district 311 and a light source setting area 312, this light source setting area 312 are extension cantilevers from this main circuit district 311.This light-emitting component 340 is arranged on the light source setting area 312 of this flexible circuit board 310.This framework 330 comprises a depressed part 331, and this depressed part 331 has two breach 332.
This liquid crystal indicator 300 can be assembled according to following order.At first, this light guide plate 400 is arranged on this framework 330; Again this light source setting area 312 is arranged in this depressed part 331, and makes this light-emitting component 340 be positioned at this breach 332; Then, main circuit district 311 reflexeds are arranged on the rear side of this framework 330 and light guide plate 400; At last, this display panels 320 is arranged on this framework 330, this light source setting area 312 is interposed between this framework 330 and this display panels 320.
This framework 330 is the glue frame normally, this light-emitting component 340 normally light emitting diode (Light Emitting Diode, LED).
Please refer to Fig. 2 again, be light emitting surface of light emitting diode with the light guide plate incidence surface between distance X and the graph of a relation of the relative emitting brightness Y of light guide plate, wherein the unit of distance X is mm.As can be seen, distance X is big more, and emitting brightness Y is more little relatively, and promptly the light utilization efficiency of light emitting diode is low more.
In addition, also there is influence in the angle between light emitting surface of light emitting diode and the light guide plate incidence surface to the homogeneity of light guide plate emitting brightness.
Because above-mentioned light emitting surface of light emitting diode and the distance between the light guide plate incidence surface and angle are to the emitting brightness of light guide plate and the relation of brightness uniformity, when adopting liquid crystal indicator 300 shown in Figure 1, liquid crystal indicator 300 will there are the following problems for this: at first, because the restriction of existing manufacturing capacity, the size of the breach 332 of this framework 330 can not be held this light-emitting component 340 just, that is to say, after finishing assembling, have certain clearance between this light-emitting component 340 and the light guide plate 400, this gap will influence the emitting brightness of light guide plate 400; In addition, because light-emitting component 340 is arranged on the flexible circuit board 310, this flexible circuit board 310 deforms easily, be under the situation of cantilever shape particularly in this light source setting area 312, this light source setting area 312 especially is difficult to keep the planarization of self, so, will very easily cause the generation of the angle between single light-emitting component 340 exiting surfaces and light guide plate 400 incidence surfaces, this angle will influence the homogeneity of the emitting brightness of light guide plate 400; And, when adopting a plurality of light-emitting component 340, not only can produce angle between these light-emitting component 340 exiting surfaces and light guide plate 400 incidence surfaces, and this angle has nothing in common with each other also, will further influence the homogeneity of the emitting brightness of light guide plate 400.
[summary of the invention]
For the light emitting surface of light emitting diode of the module backlight that overcomes prior art and the distance between the light guide plate incidence surface and angle to the problem that there is influence in the emitting brightness and the brightness uniformity of light guide plate, the invention provides a kind of distance between light emitting surface of light emitting diode and the light guide plate incidence surface and module backlight of angle of reducing.
The present invention also provides a kind of distance between light emitting surface of light emitting diode and the light guide plate incidence surface and liquid crystal indicator of angle of reducing.
Module backlight of the present invention comprises a framework, a light guide plate and a circuit board, this light guide plate is arranged in this framework and has an incidence surface, this framework has a sidewall, has a light-emitting component on this circuit board, this light-emitting component is arranged between the incidence surface of this framework and this light guide plate, wherein, this framework comprises the first projection arm towards framework in and the elastic component that be arranged at this first projection arm on integrally formed with this sidewall, and this elastic component is pressed on this light-emitting component on the incidence surface of this light guide plate.
Liquid crystal indicator of the present invention comprises that a module backlight and is arranged on the display panels of this module backlight top, this module backlight comprises a framework, one light guide plate and a circuit board, this light guide plate is arranged in this framework and has an incidence surface, this framework has a sidewall, has a light-emitting component on this circuit board, this light-emitting component is arranged between the incidence surface of this framework and this light guide plate, wherein, this framework comprises the first projection arm towards framework in and the elastic component that be arranged at this first projection arm on integrally formed with this sidewall, and this elastic component is pressed on this light-emitting component on the incidence surface of this light guide plate.
Compared to prior art, because the framework of module backlight of the present invention has an elastic component, this elastic component can provide elastic acting force that light-emitting component is promoted towards the light guide plate incidence surface in assembling process and after the assembling, reduce the exiting surface of light-emitting component and the distance between the light guide plate incidence surface, and, exiting surface at light-emitting component is under the situation on plane, can make the exiting surface of light-emitting component and light guide plate incidence surface paste neat by this thrust, reduce angle between the exiting surface of light-emitting component and the light guide plate incidence surface, thereby improve the present invention's module backlight and the emitting brightness of liquid crystal indicator and the homogeneity of brightness.
[description of drawings]
Fig. 1 is a kind of floor map of prior art liquid crystal indicator, and this liquid crystal indicator is in a state before the assembling.
Fig. 2 is the graph of a relation of the distance between light emitting surface of light emitting diode and the light guide plate incidence surface and the relative emitting brightness of light guide plate in the module backlight.
Fig. 3 is the three-dimensional exploded view of liquid crystal indicator of the present invention.
Fig. 4 is the stereographic map of the glue frame of liquid crystal indicator of the present invention.
Fig. 5 is the stereographic map at another visual angle of the glue frame of liquid crystal indicator of the present invention.
Fig. 6 is the glue frame of liquid crystal indicator of the present invention and the three-dimensional assembly diagram of light emitting diode and light guide plate.
Fig. 7 is the three-dimensional assembly diagram of liquid crystal indicator of the present invention.
[embodiment]
As shown in Figure 3, be the three-dimensional exploded view of liquid crystal indicator of the present invention.This liquid crystal indicator 100 comprises a display panels 1, a photo-shield strip 2 and a module 5 backlight.
This module 5 backlight comprises on one brightening piece 52 on the diffusion sheet 51,, once brightening piece 53, once diffusion sheet 54, a framework 55, a light guide plate 56, a reflector plate 57 and a secondary circuit board 58.
With reference to Fig. 4 and Fig. 5, this framework 55 has the first side wall 551, second sidewall 552, the 3rd sidewall 553, the 4th sidewall 554 and a back up pad 557.This first side wall 551, second sidewall 552, the 3rd sidewall 553 and the 4th sidewall 554 are formed a receiving space (not indicating), 557 of this back up pads are separated into first receiving space 558 and second receiving space 559 with this receiving space, the ㄩ shape plate that this back up pad 557 self is a hollow, the ㄩ shape opening of this back up pad 557 is to should second sidewall 552.
Have one on this second sidewall 552 and lack 5521 and a plurality of first projection arm 555 and the second projection arm 5522 in this framework 55.On this first projection arm 555 shell fragment 556 is set.This first projection arm 555 is linears, and this shell fragment 556 is arcs, and this shell fragment 556 is towards the direction setting vertical with this first projection arm 555.The length of this second projection arm 5522 is less than this first projection arm 555, and, form the gap between itself and the first projection arm 555.
With reference to Fig. 6, this pair circuit board 58 has a plurality of light-emitting components 59 and a conductor strip 581 together.When this pair circuit board 58, light guide plate 56 and framework 55 are assembled, this light guide plate 56 snaps in the ㄩ shape space of these back up pad 557 hollows, these pair circuit board 58 smooth these a plurality of first projection arms 555 are provided with, and a side that makes this pair circuit board 58 is clamped in this second projection arm 5522 and the first projection arm, the 555 formed gaps, this light-emitting component 59 is clamped between this shell fragment 556 and the light guide plate 56, and this conductor strip 581 is stretched out framework 55 by breach 5521.
It should be noted that, because the gap of this shell fragment 556 under undeformed situation still and between the light guide plate 56 is less than the size of light-emitting component 59, when the secondary circuit board 58 of assembling, need earlier shell fragment 556 to be spurred towards the direction away from light guide plate 56, reserve enough receiving spaces, wait this light-emitting component 59 behind the position between this shell fragment 556 and the light guide plate 56, cancel the acting force to shell fragment 556 again, this shell fragment 556 promptly compresses this light-emitting component 59.
Please refer to Fig. 3 again, module 5 backlight of the present invention also needs further reflector plate 57 is being arranged on the package assembly shown in Figure 5 on the bottom surface 563 of this light guide plate 56 when assembling, and at this moment, this reflector plate 57 is housed in second receiving space 559 of this framework 55.The following diffusion sheet 54 of this module 5 backlight, time brightening piece 53, last brightening piece 52 and last diffusion sheet 51 are successively set on the exiting surface 562 of this light guide plate 56, at this moment, this time diffusion sheet 54, time brightening piece 53, last brightening piece 52 and last diffusion sheet 51 are housed in first receiving space 558 of this framework 55.
Please refer to Fig. 7 again, the assembling of liquid crystal indicator 100 of the present invention is display panels 1 to be provided with should go up diffusion sheet 51 tops, and this display panels 1 and last diffusion sheet 51 also need be provided with photo-shield strip 2, to limit the bright dipping zone of module 5 backlight.
Above-mentioned main circuit board, secondary circuit board 58 be flexible circuit board normally, and wherein, to this display panels 1, this pair circuit board 58 is used for electric energy is imported this light-emitting component 59 this main circuit board in order to input signal.This light-emitting component 59 is light emitting diode normally.This framework 55 is the glue frame normally.
Compared to prior art, because the framework 55 of module backlight 5 of the present invention has shell fragment 556, this shell fragment 556 can provide elastic acting force that light-emitting component 59 is promoted towards light guide plate 56 incidence surfaces 561 in assembling process and after the assembling, reduce the distance between light-emitting component 59 exiting surfaces 591 and light guide plate 56 incidence surfaces 561, and, at light-emitting component 59 exiting surfaces 591 is under the situation on plane, it is neat light-emitting component 59 exiting surfaces 591 and light guide plate incidence surface to be pasted by this thrust, reduce angle between light-emitting component 59 exiting surfaces 591 and light guide plate 56 incidence surfaces 561, thereby improve the present invention's module 5 backlight and the emitting brightness of liquid crystal indicator 100 and the homogeneity of brightness.
Claims (9)
1. module backlight, comprise a framework, a light guide plate and a circuit board, this light guide plate is arranged in this framework and has an incidence surface, this framework has a sidewall, has a light-emitting component on this circuit board, this light-emitting component is arranged between the incidence surface of this framework and this light guide plate, it is characterized in that: this framework comprises the first projection arm towards framework in and the elastic component that be arranged at this first projection arm on integrally formed with this sidewall, and this elastic component is pressed on this light-emitting component on the incidence surface of this light guide plate.
2. module backlight as claimed in claim 1 is characterized in that: this first projection arm is a linear, and this elastic component is an arc, and this elastic component is towards the direction setting vertical with this first projection arm.
3. module backlight as claimed in claim 2 is characterized in that: second a projection arm in this framework further is set on the sidewall of this framework, forms the gap between this second projection arm and the first projection arm, a side of this gap clamping circuit board.
4. module backlight as claimed in claim 1 is characterized in that: further comprise a blooming piece, this blooming piece is provided with on the exiting surface of this light guide plate.
5. module backlight as claimed in claim 4 is characterized in that: this blooming piece is diffusion sheet or blast sheet.
6. module backlight as claimed in claim 4 is characterized in that: this blooming piece is made up of diffusion sheet and blast sheet.
7. module backlight as claimed in claim 1 is characterized in that: further comprise a reflector plate, this reflector plate this light guide plate is set with the exiting surface opposed bottom surface on.
8. module backlight as claimed in claim 1 is characterized in that: this circuit board is a flexible circuit board, and this light-emitting component is a light emitting diode.
9. liquid crystal indicator, comprise that a module backlight and is arranged on the display panels of this module backlight top, this module backlight comprises a framework, one light guide plate and a circuit board, this light guide plate is arranged in this framework and has an incidence surface, this framework has a sidewall, has a light-emitting component on this circuit board, this light-emitting component is arranged between the incidence surface of this framework and this light guide plate, it is characterized in that: this framework comprises the first projection arm towards framework in and the elastic component that be arranged at this first projection arm on integrally formed with this sidewall, and this elastic component is pressed on this light-emitting component on the incidence surface of this light guide plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100774884A CN100403111C (en) | 2004-12-10 | 2004-12-10 | Back light module and liquid crystal dispalying apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100774884A CN100403111C (en) | 2004-12-10 | 2004-12-10 | Back light module and liquid crystal dispalying apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1786788A CN1786788A (en) | 2006-06-14 |
| CN100403111C true CN100403111C (en) | 2008-07-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100774884A Expired - Fee Related CN100403111C (en) | 2004-12-10 | 2004-12-10 | Back light module and liquid crystal dispalying apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100403111C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI295398B (en) | 2006-08-11 | 2008-04-01 | Innolux Display Corp | Backlight module and liquid crystal display device usaing the same |
| CN102322601A (en) * | 2011-10-12 | 2012-01-18 | 深圳市华星光电技术有限公司 | Light-emitting diode (LED) backlight module and liquid crystal display device |
| TWI472847B (en) * | 2011-10-27 | 2015-02-11 | Innolux Corp | Display device and backlight module thereof |
| TW201333599A (en) * | 2012-02-08 | 2013-08-16 | Young Lighting Technology Inc | Backlight module |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10334718A (en) * | 1997-06-03 | 1998-12-18 | Nichia Chem Ind Ltd | Plane luminous device |
| JP2002156632A (en) * | 2000-11-20 | 2002-05-31 | Hitachi Ltd | Liquid crystal display device |
| JP2003215546A (en) * | 2002-01-24 | 2003-07-30 | Hitachi Ltd | Liquid crystal display |
| JP2004117435A (en) * | 2002-09-24 | 2004-04-15 | Kawaguchiko Seimitsu Co Ltd | Backlight structure for liquid crystal display panel |
-
2004
- 2004-12-10 CN CNB2004100774884A patent/CN100403111C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10334718A (en) * | 1997-06-03 | 1998-12-18 | Nichia Chem Ind Ltd | Plane luminous device |
| JP2002156632A (en) * | 2000-11-20 | 2002-05-31 | Hitachi Ltd | Liquid crystal display device |
| JP2003215546A (en) * | 2002-01-24 | 2003-07-30 | Hitachi Ltd | Liquid crystal display |
| JP2004117435A (en) * | 2002-09-24 | 2004-04-15 | Kawaguchiko Seimitsu Co Ltd | Backlight structure for liquid crystal display panel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1786788A (en) | 2006-06-14 |
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| C14 | Grant of patent or utility model | ||
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Granted publication date: 20080716 Termination date: 20171210 |