CN202361206U - Backlight module and liquid crystal display device - Google Patents

Backlight module and liquid crystal display device Download PDF

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Publication number
CN202361206U
CN202361206U CN2011205102272U CN201120510227U CN202361206U CN 202361206 U CN202361206 U CN 202361206U CN 2011205102272 U CN2011205102272 U CN 2011205102272U CN 201120510227 U CN201120510227 U CN 201120510227U CN 202361206 U CN202361206 U CN 202361206U
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CN
China
Prior art keywords
liquid crystal
module backlight
lgp
crystal panel
attached
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
CN2011205102272U
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Chinese (zh)
Inventor
刘健
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Shanghai AVIC Optoelectronics Co Ltd
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Shanghai AVIC Optoelectronics Co Ltd
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Priority to CN2011205102272U priority Critical patent/CN202361206U/en
Application granted granted Critical
Publication of CN202361206U publication Critical patent/CN202361206U/en
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Expired - Lifetime legal-status Critical Current

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Abstract

The utility model discloses a backlight module which comprises a light guide plate, a light source set, an optical membrane set and a reflective sheet. The light source set is positioned at the side edge of the light guide plate and is attached onto a liquid crystal panel; the optical membrane set is arranged above the light guide plate; the reflective sheet is provided with a body, a side wall and a reflection part; the body is arranged below the light guide plate and covers the light guide plate; the side wall extends upwards from the body; and the reflection part extends inward from the side wall and is attached to the edge of the liquid crystal panel. According to the backlight module, a glue frame, a lower iron frame and an upper iron frame are saved, but the reflective sheet is utilized to fix the light source set and the optical membrane set, so that the cost of a die is saved, the thickness of the backlight module can be reduced and the assembling step is simplified.

Description

Module backlight and liquid crystal indicator
Technical field
The utility model relates to LCD and makes the field, particularly relates to a kind of module backlight and liquid crystal indicator.
Background technology
LCD (LCD) is to utilize the variation that is clipped in electric-field intensity on the liquid crystal molecule, and the power that changes the orientation control printing opacity of liquid crystal molecule is come display image.In general, complete display panels module backlight, polaroid, thin film transistor (TFT) (TFT) infrabasal plate and color filter (CF) upper substrate must be arranged and the box formed by two substrates in the layer of liquid crystal molecule of filling constitute.LCDs is passive light-emitting display device, that is to say, crystal liquid substrate itself can not be luminous, need light source be provided by module backlight.Said module backlight is made up of backboard, light source, diffuser plate and various blooming piece usually.
General, module backlight is divided into two kinds of straight-down negative and side-light types according to the position difference of light source.The light source of down straight aphototropism mode set is positioned at the bottom of module backlight; The light utilization of the light source of said down straight aphototropism mode set is higher; Can form the zone that light and shade replaces but directly-down light source is luminous; Therefore need higher diffuser plate of mist degree and bigger lamp box distance to solve this problem, increased the thickness of module backlight.The light source of said side-light type module backlight is positioned at a side of module backlight; The light that light emitted is come out converts line source into area source through LGP; To reach brightness and uniformity requirement; The light utilization of said side-light type module backlight is relatively low, but advantage such as it is simple to have technology, and volume is frivolous.
Please refer to Fig. 1; It is the cross-sectional view of existing a kind of side-light type module backlight; Said module backlight comprises lamp source group 11, following chase 16, reflector plate 12, LGP 13, glue frame 14 and blooming piece 15; Glue frame 14 is assembled in down on the chase 16, and then with optical element, for example reflector plate 12, lamp source group 11, LGP 13, blooming piece 15 are installed in this glue frame 14 fixing.With regard to module backlight, following chase 16 provides the function of module backlight and structural strength thereof, and glue frame 14 then is in order to place and fixing optical element for example reflector plate 12, lamp source group 11, LGP 13, a plurality of blooming piece 15.
At present, most of LCDs adopt CCFL (cold-cathode fluorescent) module backlight, receive the restriction of the CCFL characteristics of luminescence, adopt the LCD TV of CCFL module backlight, and its color reducibility is relatively poor.Along with the development of LED (Light-Emitting Diode) technology, LED is applied to the module backlight of LCDs gradually, and the light source that the LED-backlit module provides has that color reducibility is good, contrast is high, brightness is high and the fireballing advantage of light emitting control.As shown in Figure 2; Application number is that 200920049769.7 one Chinese patent application discloses a kind of module backlight; This module backlight comprises from the back side the extremely positive metal coating housing 1 that makes up successively, reflector plate 2, LGP 3, diffusion sheet 4, following brightening piece 5, goes up brightening piece 6 and anti-dazzling screen 7; Said LGP side is provided with LED light emitting source assembly; Said LED light emitting source assembly is welded with FPC 9 by the lamp string 8 that some LED lamps are cascaded, and also is equiped with glue frame 10 under the said LED light emitting source assembly.
Yet with regard to the overall structure of module backlight, optical element is indispensable, therefore if will reduce cost, must consider to adopt other element to replace original glue frame, makes the structure and the function of it storing that possesses the virgin rubber frame and fixing optical element.Therefore, how utilizing other element to replace the glue frame of module backlight, is relevant dealer's difficult problem to be overcome in fact.
The utility model content
The purpose of the utility model is to provide a kind of module backlight and liquid crystal indicator, to save die cost, reduces module thickness backlight, and simplifies number of assembling steps.
For solving the problems of the technologies described above; The utility model provides a kind of module backlight; Comprise: LGP, light sources, optical diaphragm group and reflector plate, said light sources are positioned at the side of said LGP and are attached on the liquid crystal panel, and said optical diaphragm group is arranged at said LGP top; Said reflector plate has body, sidewall and invayination; Said body is arranged at said LGP below and covers said LGP, and said sidewall extends upward from said body and forms, and said invayination extends internally and is attached at the edge of said liquid crystal panel from said sidewall.
Optional, in described module backlight, said body is attached on the said LGP through double faced adhesive tape or hot-setting adhesive.
Optional, in described module backlight, said invayination is attached at the edge of said liquid crystal panel through double faced adhesive tape or hot-setting adhesive.
Optional, in described module backlight, said light sources is attached at the edge of said liquid crystal panel through double faced adhesive tape or hot-setting adhesive.
Optional, in described module backlight, said light sources is positioned at a side of said LGP.
Optional, in described module backlight, said light sources is positioned at the both sides of said LGP.
Optional, in described module backlight, said optical diaphragm group comprises following diffusion sheet, following brightening piece from the bottom to top, goes up brightening piece and last diffusion sheet.
According to the another side of the utility model, a kind of liquid crystal indicator also is provided, said liquid crystal indicator comprises liquid crystal panel and aforesaid module backlight.
Compared with prior art, the module backlight of the utility model has omitted glue frame, following chase and last chase, but utilizes reflector plate to fix light sources and optical diaphragm group, has saved die cost, and can reduce the thickness of module backlight, simplifies number of assembling steps.
Description of drawings
Fig. 1 is the cross-sectional view of existing a kind of module backlight;
Fig. 2 is the cross-sectional view of existing another kind module backlight;
Fig. 3 is the cross-sectional view of the module backlight of the utility model one embodiment;
Fig. 4 is the assembling sketch map of the module backlight of the utility model one embodiment.
The specific embodiment
Below in conjunction with accompanying drawing and specific embodiment the utility model is done further explain.What need explanation is, accompanying drawing all adopts the form of simplifying very much and all uses non-ratio accurately, only in order to convenient, the purpose of aid illustration the utility model embodiment lucidly.
As shown in Figure 3; The module backlight that the utility model one embodiment provides comprises: LGP 110, light sources 120, optical diaphragm group 130 and reflector plate 140; Said light sources 120 is positioned at the side of said LGP 110 and is attached on the liquid crystal panel 200; Said optical diaphragm group 130 is arranged at said LGP 110 tops, and said reflector plate 140 has body 141, sidewall 142 and invayination 143, and said body 141 is arranged at said LGP 110 belows and covers said LGP 110; Said sidewall 142 extends upward from said body 141 and forms, and said invayination 143 extends internally and is attached at the edge of said liquid crystal panel 200 from said sidewall 142.So, reflector plate 140 promptly capable of using fixes light sources 120 and optical diaphragm group 130, has saved die cost, and can reduce the thickness of module backlight, simplifies number of assembling steps.
Need to prove that said module backlight can omit backboard, said body 141 directly is attached on the said LGP 110 through double faced adhesive tape or hot-setting adhesive, thereby further reduces the thickness of module backlight.
The invayination 143 of said reflector plate 140 can be attached at the edge of said liquid crystal panel 200 through double faced adhesive tape or hot-setting adhesive, and it can be formed by PET polyester or other plastics, and has white or other has the surface of light reflecting effect.Said optical diaphragm group 130 from the bottom to top (by near the direction of LGP 110 to direction away from LGP 110) can comprise down diffusion sheet, down brightening piece, go up brightening piece and last diffusion sheet; Certainly; Also can increase or delete blooming piece according to actual needs accordingly; Because the structure of said optical diaphragm group 130 is a technological means well known to those skilled in the art, so repeat no more.
Said light sources 120 is preferably by PCB (Printed Circuit Board; Printed circuit board (PCB)) and be arranged at LED (the Light Emitting Diode on the PCB; Light emitting diode) form, the light source that the led light source group provides has that color reducibility is good, contrast is high, brightness is high and the fireballing advantage of light emitting control.Said light sources 120 can be positioned at a side of LGP 110, also can as shown in Figure 3ly be positioned at the both sides of LGP 110.Said light sources 120 can be attached at the edge of liquid crystal panel 200 through double faced adhesive tape or hot-setting adhesive, to realize the purpose of fixed light source group 120.
The length of supposing LGP 110 is H1, and the length of liquid crystal panel 200 is H2, and the width of light sources is H3; The length of the viewing area of this liquid crystal indicator is H4, and invayination 143 width are H5, and himself thickness of reflector plate 140 is ignored; So, as shown in Figure 3, be positioned at the both sides of said LGP 110 when said light sources 120; And the invayination 143 of liquid crystal panel 200 left and right sides is symmetrical, then:
H1=H2-2*H3;
H4=H2-2*H5;
Accordingly, if said light sources 120 only is positioned at a side of said LGP 110, then:
H1=H2-H3;
H4=H2-H5。
With reference to figure 3 and Fig. 4; The assembling process of said module backlight is following: at first on liquid crystal panel 200, paste double faced adhesive tape; Then light source assembly 120 is attached on the double faced adhesive tape, then optical diaphragm group 130 and LGP 110 is installed in the back side of said liquid crystal panel 200, assemble reflector plate 140 at last; The reflector plate bucklings that turn over to liquid crystal panel 200 fronts are formed invayination 143; Invayination 143 is attached at the edge of liquid crystal panel 200 through double faced adhesive tape or hot-setting adhesive, can accomplishes whole assembling, whole assembling process is convenient and swift.
According to the another side of the utility model, a kind of liquid crystal indicator also is provided, said liquid crystal indicator comprises liquid crystal panel and aforesaid module backlight, is not described in detail here.
Need to prove that although above embodiment has specified the utility model, those skilled in the art can also carry out various changes and modification to the utility model and not break away from the spirit and the scope of the utility model.Like this, belong within the scope of the utility model claim and equivalent technologies thereof if these of the utility model are revised with modification, then the utility model also is intended to comprise these changes and modification interior.

Claims (8)

1. module backlight; It is characterized in that; Comprise: LGP, light sources, optical diaphragm group and reflector plate, said light sources are positioned at the side of said LGP and are attached on the liquid crystal panel, and said optical diaphragm group is arranged at said LGP top; Said reflector plate has body, sidewall and invayination; Said body is arranged at said LGP below and covers said LGP, and said sidewall extends upward from said body and forms, and said invayination extends internally and is attached at the edge of said liquid crystal panel from said sidewall.
2. module backlight as claimed in claim 1 is characterized in that said body is attached on the said LGP through double faced adhesive tape or hot-setting adhesive.
3. module backlight as claimed in claim 1 is characterized in that, said invayination is attached at the edge of said liquid crystal panel through double faced adhesive tape or hot-setting adhesive.
4. module backlight as claimed in claim 1 is characterized in that, said light sources is attached at the edge of said liquid crystal panel through double faced adhesive tape or hot-setting adhesive.
5. like any described module backlight in the claim 1 to 4, it is characterized in that said light sources is positioned at a side of said LGP.
6. like any described module backlight in the claim 1 to 4, it is characterized in that said light sources is positioned at the both sides of said LGP.
7. like any described module backlight in the claim 1 to 4, it is characterized in that said optical diaphragm group comprises following diffusion sheet, following brightening piece from the bottom to top, goes up brightening piece and last diffusion sheet.
8. a liquid crystal indicator is characterized in that, comprises liquid crystal panel and like each described module backlight in the claim 1 to 7.
CN2011205102272U 2011-12-08 2011-12-08 Backlight module and liquid crystal display device Expired - Lifetime CN202361206U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011205102272U CN202361206U (en) 2011-12-08 2011-12-08 Backlight module and liquid crystal display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011205102272U CN202361206U (en) 2011-12-08 2011-12-08 Backlight module and liquid crystal display device

Publications (1)

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CN202361206U true CN202361206U (en) 2012-08-01

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102980098A (en) * 2012-11-22 2013-03-20 京东方科技集团股份有限公司 Backlight module and display device
CN103093700A (en) * 2012-10-18 2013-05-08 友达光电股份有限公司 Display device and manufacturing method thereof
CN104848083A (en) * 2015-04-07 2015-08-19 武汉华星光电技术有限公司 Display device and backlight module thereof
WO2016161667A1 (en) * 2015-04-09 2016-10-13 深圳市华星光电技术有限公司 Backlight module and liquid crystal display
CN108490691A (en) * 2018-05-23 2018-09-04 深圳市南极光电子科技有限公司 A kind of glue frame, backlight module and display device
CN108881761A (en) * 2018-07-18 2018-11-23 深圳创维-Rgb电子有限公司 A kind of backboard, display module and display equipment

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103093700A (en) * 2012-10-18 2013-05-08 友达光电股份有限公司 Display device and manufacturing method thereof
CN103093700B (en) * 2012-10-18 2015-03-18 友达光电股份有限公司 Display device and manufacturing method thereof
TWI481935B (en) * 2012-10-18 2015-04-21 Au Optronics Corp Method for fabricating display device
CN102980098A (en) * 2012-11-22 2013-03-20 京东方科技集团股份有限公司 Backlight module and display device
CN104848083A (en) * 2015-04-07 2015-08-19 武汉华星光电技术有限公司 Display device and backlight module thereof
CN104848083B (en) * 2015-04-07 2017-07-28 武汉华星光电技术有限公司 Display device and its backlight module
US9891373B2 (en) 2015-04-07 2018-02-13 Wuhan China Star Optoelectronics Technology Co., Ltd. Display device and backlight module thereof
WO2016161667A1 (en) * 2015-04-09 2016-10-13 深圳市华星光电技术有限公司 Backlight module and liquid crystal display
CN108490691A (en) * 2018-05-23 2018-09-04 深圳市南极光电子科技有限公司 A kind of glue frame, backlight module and display device
CN108881761A (en) * 2018-07-18 2018-11-23 深圳创维-Rgb电子有限公司 A kind of backboard, display module and display equipment
CN108881761B (en) * 2018-07-18 2021-03-05 深圳创维-Rgb电子有限公司 Backplate, display module assembly and display device

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Granted publication date: 20120801

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