WO2016176929A1 - 背光模块及液晶显示器 - Google Patents

背光模块及液晶显示器 Download PDF

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Publication number
WO2016176929A1
WO2016176929A1 PCT/CN2015/087929 CN2015087929W WO2016176929A1 WO 2016176929 A1 WO2016176929 A1 WO 2016176929A1 CN 2015087929 W CN2015087929 W CN 2015087929W WO 2016176929 A1 WO2016176929 A1 WO 2016176929A1
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WIPO (PCT)
Prior art keywords
backlight module
light guide
guide plate
optical film
light
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PCT/CN2015/087929
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English (en)
French (fr)
Inventor
刘中杰
张彦学
郭伟
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武汉华星光电技术有限公司
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Application filed by 武汉华星光电技术有限公司 filed Critical 武汉华星光电技术有限公司
Priority to US14/782,241 priority Critical patent/US20160327718A1/en
Publication of WO2016176929A1 publication Critical patent/WO2016176929A1/zh

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133608—Direct backlight including particular frames or supporting means
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0055—Reflecting element, sheet or layer
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G02F1/133314—Back frames

Definitions

  • the present invention relates to the field of liquid crystal display technology, and in particular to a backlight module and a liquid crystal display having the same.
  • the market is increasingly pursuing the narrow frame of portable products.
  • the frame of a device requiring a liquid crystal display such as a mobile phone or a tablet computer
  • the frame of the liquid crystal display needs to be narrower and narrower.
  • whether the frame of the backlight module can be narrowly framed determines whether the liquid crystal display can be narrowly framed.
  • the minimum width of the frame of the backlight module can reach 0.65 mm, wherein the width of the plastic frame is 0.2 mm to 0.3 mm.
  • the width of the frame is generally reduced by changing the frame structure or narrowing the length of the tape.
  • This brings three problems: 1.
  • the production of the special frame structure is very good for the existing injection molding technology. The big challenge directly leads to the increase of cost; 2.
  • the narrowing of the length of the light-shielding adhesive will reduce the accuracy of the attachment, which will reduce the reliability of the product; 3.
  • the narrowing of the length of the light-shielding adhesive will result in the light-shielding glue and the optical film.
  • the length of the attachment is narrowed, resulting in reduced shading performance and optical taste of the image backlight module.
  • an object of the present invention is to provide a backlight module including a light guide plate, an optical film, and a light shielding glue, wherein the optical film is disposed on a top surface of the light guide plate. a portion of the light-shielding glue is adhered to the top edge of the optical film, and another portion of the light-shielding glue is adhered to the side of the optical film and the side of the light guide plate and extends to adhere to the The bottom edge of the light guide plate.
  • Another object of the present invention is to provide a liquid crystal display including the backlight module and the liquid crystal panel disposed opposite to each other, and the backlight module provides a display light source to the liquid crystal panel.
  • the light shielding glue has a U shape.
  • the backlight module does not include a plastic frame.
  • the backlight module further includes a back frame, the back frame includes a bottom plate and a side plate at a side end of the bottom plate, and the light guide plate is disposed on the bottom plate to adhere to a side surface of the optical film and The light shielding glue on the side of the light guide plate is pasted with the side plate.
  • the backlight module further includes a reflective sheet disposed between the light shielding glue adhered to the bottom edge of the light guide plate and the bottom plate.
  • the optical film is fixed on the light guide plate by using the light shielding glue, and the light guide plate and the optical film are fixed in the back frame by using the light shielding glue, instead of using the prior art.
  • the light frame and the optical film are fixed in the plastic frame of the back frame. Since the thickness of the light shielding glue is much smaller than the thickness of the plastic frame, the width of the frame of the backlight module can be greatly reduced.
  • FIG. 1 is a partial side view of a liquid crystal display according to an embodiment of the present invention.
  • FIG. 1 is a partial side view of a liquid crystal display according to an embodiment of the present invention.
  • a liquid crystal display includes a liquid crystal panel 100 and a backlight module 200 disposed opposite to each other, wherein the backlight module 200 provides a high brightness display light source to the liquid crystal panel 100 having high resolution to make the liquid crystal
  • the panel 100 displays an image.
  • the present invention is directed to the backlight module 200. Therefore, in order to avoid redundancy, the details of the liquid crystal panel 100 are not described in detail herein. Those skilled in the art may refer to the liquid crystal panel disclosed in the prior art. Structure.
  • a backlight module 200 includes a back frame (or back plate) 210 , a light guide plate 220 , an optical film 230 , and a light shielding paste 240 .
  • the back frame 210 generally includes a bottom plate 211 and side plates 212 respectively located at the four side ends of the bottom plate 211.
  • the light guide plate 220 is disposed on the bottom plate 211 of the back frame 210. In this embodiment, one side 221 of the light guide plate 220 is adjacent to the side plate 212 of the back frame 210.
  • the optical film 230 is disposed above the top surface of the light guide plate 220. In the present embodiment, the number of optical films 230 is not specifically limited.
  • the shading adhesive 240 can be, for example, a black and white shading gel.
  • a portion of the light shielding adhesive 240 is adhered to the top surface edge of the optical film 230, and another portion of the light shielding adhesive 240 is adhered to the side surface 231 of the optical film 230 and the side surface 221 of the light guide plate 220, and another portion of the light shielding adhesive 240 is extended.
  • the light shielding adhesive 240 adhered to the side surface 231 of the optical film 230 and the side surface 221 of the light guide plate 220 is bonded to the side plate 212 of the light guide plate 220.
  • the light guide plate 220 and the optical film 230 can be fixed in the back frame 210, thereby eliminating the plastic frame of the fixed light guide plate and the optical film in the prior art, and the width of the light shielding adhesive 240 is much smaller than that of the plastic frame. The width can thus greatly reduce the frame width of the backlight module 20.
  • the backlight module 200 further includes a reflective sheet 250 disposed between the light guide plate 220 and the bottom plate 211 of the back frame 210, and the reflective sheet 280 extends to the side plate 212 of the back frame 210, that is, The portion of the reflection sheet 280 that extends to the side plate 212 of the back frame 210 is disposed between the light shielding paste 240 adhered to the edge of the light guide plate 220 and the bottom plate 211 of the back frame 210.
  • the reflective sheet 280 can reflect the light reaching the light back into the light guide plate 220, thereby improving the light utilization efficiency of the backlight module 200.
  • the optical film is fixed on the light guide plate by using the light shielding glue, and the light guide plate and the optical film are fixed in the back frame by using the light shielding glue, instead of using the existing In the technology, the light guide plate and the optical film are fixed in the plastic frame of the back frame, and since the thickness of the light shielding glue is much smaller than the thickness of the plastic frame, the width of the frame of the backlight module can be greatly reduced.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Planar Illumination Modules (AREA)
  • Liquid Crystal (AREA)

Abstract

一种背光模块（200）和一种具有该背光模块（200）的液晶显示器，所述背光模块（200）包括导光板（220）、光学膜片（230）以及遮光胶（240），所述光学膜片（230）设置于所述导光板（220）的顶面上，所述遮光胶（240）的一部分粘附于所述光学膜片（230）的顶面边缘处，所述遮光胶（240）的另一部分粘附于所述光学膜片（230）的侧面和所述导光板（220）的侧面并延伸粘附至所述导光板（220）的底面边缘处。所述背光模块（200）中利用遮光胶（240）将光学膜片（230）固定在导光板（220）上，并且利用遮光胶（240）将导光板（220）和光学膜片（230）固定在背框（210）中，而不采用现有技术中的将导光板（220）和光学膜片（230）固定在背框（210）中的胶框，由于遮光胶（240）的厚度远小于胶框的厚度，因此可大幅度降低背光模块（200）的边框的宽度。

Description

背光模块及液晶显示器 技术领域
本发明属于液晶显示技术领域，具体地讲，涉及一种背光模块及具有该背光模块的液晶显示器。
背景技术
目前，市场越来越追求便携式产品的窄边框化，例如现在的手机、平板电脑等需要液晶显示器的设备的边框越做越窄，因此液晶显示器的边框也需要越做越窄。在整个液晶显示器中，背光模块的边框是否能够窄边框化决定了液晶显示器是否能够窄边框化。
在现有技术中，背光模块的边框的最小宽度可达0.65mm，其中，胶框的宽度为0.2mm至0.3mm。目前，一般通过更改胶框结构或将遮光胶贴附长度变窄来减小边框的宽度，但这样会带来三个问题：1、特殊胶框结构的制作对现有的注塑冲压技术有很大的挑战，直接导致成本增加；2、遮光胶贴附长度变窄会带来贴附精度降低，从而使产品可靠性降低；3、遮光胶贴附长度变窄会导致遮光胶与光学膜片贴附的长度变窄，从而导致遮光性能降低，影像背光模块的光学品味。
发明内容
为了解决上述现有技术存在的问题，本发明的目的在于提供一种背光模块，其包括导光板、光学膜片以及遮光胶，所述光学膜片设置于所述导光板的顶面上，所述遮光胶的一部分粘附于所述光学膜片的顶面边缘处，所述遮光胶的另一部分粘附于所述光学膜片的侧面和所述导光板的侧面并延伸粘附至所述导光板的底面边缘处。
本发明的另一目的还在于提供一种液晶显示器，包括相对设置的所述背光模块及液晶面板，所述背光模块向所述液晶面板提供显示光源。
进一步地，所述遮光胶呈U型形状。
进一步地，所述背光模块不包括胶框。
进一步地，述背光模块还包括背框，所述背框包括底板及位于所述底板侧端的侧板，所述导光板设置于所述底板之上，粘附于所述光学膜片的侧面和所述导光板的侧面的遮光胶与所述侧板粘贴。
进一步地，所述背光模块还包括反射片，所述反射片设置在粘附于所述导光板的底面边缘处的遮光胶与所述底板之间。
本发明的有益效果：本发明的背光模块中利用遮光胶将光学膜片固定在导光板上，并且利用遮光胶将导光板和光学膜片固定在背框中，而不采用现有技术中的将导光板和光学膜片固定在背框中的胶框，由于遮光胶的厚度远小于胶框的厚度，因此可大幅度降低背光模块的边框的宽度。
附图说明
通过结合附图进行的以下描述，本发明的实施例的上述和其它方面、特点和优点将变得更加清楚，附图中：
图1是根据本发明的实施例的液晶显示器的局部侧视图。
具体实施方式
以下，将参照附图来详细描述本发明的实施例。然而，可以以许多不同的形式来实施本发明，并且本发明不应该被解释为限制于这里阐述的具体实施例。相反，提供这些实施例是为了解释本发明的原理及其实际应用，从而使本领域的其他技术人员能够理解本发明的各种实施例和适合于特定预期应用的各种修改。在附图中，为了清楚器件，夸大了层和区域的厚度。
图1是根据本发明的实施例的液晶显示器的局部侧视图。
参照图1，根据本发明的实施例的液晶显示器包括相对设置的液晶面板100和背光模块200，其中，背光模块200提供高亮度的显示光源给具有高解析度的液晶面板100，以使该液晶面板100显示影像。在本实施例中，由于本发明的发明要点是针对背光模块200，所以为了避免赘述，液晶面板100的具体在此不再详细介绍，本领域的技术人员可参照现有技术中公开的液晶面板的结构。
以下将对根据本发明的实施例的背光模块200进行详细的描述。继续参照图1，根据本发明的实施例的背光模块200包括：背框(或称背板)210、导光板220、光学膜片230、遮光胶240。
在图1中，仅示出了背框210包括的底板211及位于底板211一侧端的侧板212。应当理解的是，背框210通常包括底板211及分别位于底板211的四侧端的侧板212。
导光板220设置于背框210的底板211之上。在本实施例中，导光板220的一侧面221与背框210的侧板212邻近。光学膜片230设置在导光板220的顶面之上。在本实施例中，并不对光学膜片230的数量进行具体限制。
遮光胶240可例如是黑白遮光胶。遮光胶240的一部分粘附于光学膜片230的顶面边缘处，遮光胶240的另一部分粘附于光学膜片230的侧面231和导光板220的侧面221，并且遮光胶240的另一部分延伸粘附至导光板220的底面边缘处。也就是说，本实施例中的遮光胶240整体呈U型形状，其粘附于光学膜片230的顶面边缘处、光学膜片230的侧面231、导光板220的侧面221以及导光板220的底面边缘处，从而将光学膜片230固定在导光板230的顶面上。
进一步地，粘附于光学膜片230的侧面231和导光板220的侧面221的遮光胶240与导光板220的侧板212粘合在一起。这样，即可将导光板220和光学膜片230固定在背框210中，从而省去了现有技术中固定导光板和光学膜片的胶框，而遮光胶240的宽度远小于胶框的宽度，因此可大大减小背光模块20的边框宽度。
根据本发明的实施例的背光模块200还包括反射片250，反射片250置于导光板220与背框210的底板211之间，并且反射片280延伸至背框210的侧板212，也就是说，反射片280延伸至背框210的侧板212的部分设置在粘附于导光板220边缘处的遮光胶240与背框210的底板211之间。该反射片280能够将到达其上的光线反射回导光板220中，从而提高背光模块200的光利用率。
综上所述，根据本发明的实施例，背光模块中利用遮光胶将光学膜片固定在导光板上，并且利用遮光胶将导光板和光学膜片固定在背框中，而不采用现有技术中的将导光板和光学膜片固定在背框中的胶框，由于遮光胶的厚度远小于胶框的厚度，因此可大幅度降低背光模块的边框的宽度。
虽然已经参照特定实施例示出并描述了本发明，但是本领域的技术人员将理解：在不脱离由权利要求及其等同物限定的本发明的精神和范围的情况下，可在此进行形式和细节上的各种变化。

Claims (14)

  1. 一种背光模块，其中，包括导光板、光学膜片以及遮光胶，所述光学膜片设置于所述导光板的顶面上，所述遮光胶的一部分粘附于所述光学膜片的顶面边缘处，所述遮光胶的另一部分粘附于所述光学膜的侧面和所述导光板的侧面并延伸粘附至所述导光板的底面边缘处。
  2. 根据权利要求1所述的背光模块，其中，所述遮光胶呈U型形状。
  3. 根据权利要求1所述的背光模块，其中，所述背光模块不包括胶框。
  4. 根据权利要求2所述的背光模块，其中，所述背光模块不包括胶框。
  5. 根据权利要求3所述的背光模块，其中，所述背光模块还包括背框，所述背框包括底板及位于所述底板侧端的侧板，所述导光板设置于所述底板之上，粘附于所述光学膜片的侧面和所述导光板的侧面的遮光胶与所述侧板粘贴。
  6. 根据权利要求4所述的背光模块，其中，所述背光模块还包括背框，所述背框包括底板及位于所述底板侧端的侧板，所述导光板设置于所述底板之上，粘附于所述光学膜片的侧面和所述导光板的侧面的遮光胶与所述侧板粘贴。
  7. 根据权利要求5所述的背光模块，其中，所述背光模块还包括反射片，所述反射片设置在粘附于所述导光板的底面边缘处的遮光胶与所述底板之间。
  8. 一种液晶显示器，包括相对设置的背光模块及液晶面板，所述背光模块向所述液晶面板提供显示光源，其中，所述背光模块包括：导光板、光学膜片以及遮光胶，所述光学膜片设置于所述导光板的顶面上，所述遮光胶的一部分粘附于所述光学膜片的顶面边缘处，所述遮光胶的另一部分粘附于所述光学膜片的侧面和所述导光板的侧面并延伸粘附至所述导光板的底面边缘处。
  9. 根据权利要求8所述的液晶显示器，其中，所述遮光胶呈U型形状。
  10. 根据权利要求9所述的液晶显示器，其中，所述背光模块不包括胶框。
  11. 根据权利要求10所述的液晶显示器，其中，所述背光模块不包括胶框。
  12. 根据权利要求10所述的液晶显示器，其中，所述背光模块还包括背框，所述背框包括底板及位于所述底板侧端的侧板，所述导光板设置于所述底板之上，粘附于所述光学膜片的侧面和所述导光板的侧面的遮光胶与所述侧板粘贴。
  13. 根据权利要求11所述的液晶显示器，其中，所述背光模块还包括背框，所述背框包括底板及位于所述底板侧端的侧板，所述导光板设置于所述底板之上，粘附于所述光学膜片的侧面和所述导光板的侧面的遮光胶与所述侧板粘贴。
  14. 根据权利要求11所述的液晶显示器，其中，所述背光模块还包括反射片，所述反射片设置在粘附于所述导光板的底面边缘处的遮光胶与所述底板之间。
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