CN105093676A - 用于液晶显示器的背光模块 - Google Patents

用于液晶显示器的背光模块 Download PDF

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CN105093676A
CN105093676A CN201510475617.3A CN201510475617A CN105093676A CN 105093676 A CN105093676 A CN 105093676A CN 201510475617 A CN201510475617 A CN 201510475617A CN 105093676 A CN105093676 A CN 105093676A
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backlight module
light source
plate
sphenoid
liquid crystal
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刘中杰
张彦学
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Wuhan China Star Optoelectronics Technology Co Ltd
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Wuhan China Star Optoelectronics Technology Co Ltd
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Priority to CN201510475617.3A priority Critical patent/CN105093676A/zh
Priority to US14/779,165 priority patent/US20170168207A1/en
Priority to PCT/CN2015/087915 priority patent/WO2017020364A1/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
    • 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
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/002—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces
    • 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
    • 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
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133605—Direct backlight including specially adapted reflectors
    • 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
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/0031—Reflecting element, sheet or layer
    • 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
    • G02B6/0083—Details of electrical connections of light sources to drivers, circuit boards, or the like
    • 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
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    • G02F1/133612—Electrical details

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Abstract

本发明公开一种用于液晶显示器的背光模块，包括：背框(210)，其具有底板(211)及位于底板(211)侧端的侧板(212)；导光板(220)，其设置于底板(211)之上，导光板(220)包括平板体(221)以及沿平板体(221)的一端向上延伸的楔形体(222)；光源(230)，其设置于底板(211)之上且位于楔形体(222)与侧板(212)之间；柔性电路板(240)，其设置于光源(230)和侧板(212)之上且延伸至楔形体(222)上。本发明的背光模块能够在不增加厚度的同时提高出射光亮度，以满足高解析度液晶面板所需。

Description

用于液晶显示器的背光模块
技术领域
本发明属于液晶显示技术领域，具体地讲，涉及一种用于液晶显示器的背光模块。
背景技术
在现有的液晶显示器的背光模块中，通常采用将点光源(诸如发光二极管等)设置在导光板的一侧端。为了获得较好的效果，平板式的导光板的厚度就必须等于或大于LED光源的直径，这样才能保证LED光源发出的光线能够充分地进入导光板中。
市场的发展趋势是追求便携式产品的轻薄化，如现在的手机、平板电脑、笔记本电脑等需要液晶显示器的设备越做越薄，因此液晶显示器的厚度也需要越做越薄。在整个液晶显示器中，除了液晶面板外，背光模块就构成了它的主要厚度。要减小产品的厚度最有效的方法就是将背光模块的厚度做薄。但是，随着便携式产品中液晶面板具有越来越高的解析度，对应的液晶面板的穿透率会降低，这就需要更高亮度的背光模块提供显示光源给液晶面板。
现有技术中提高背光模块亮度的最有效的方法就是选用大功率的LED光源，但这种方法具有明显的缺陷，就是大功率的LED光源的直径会增加，进而在搭载背光模块之后为了满足导光板的厚度等于或大于LED光源的直径，就必须增加导光板的厚度，而在背光模块中，导光板所占厚度比重最大，这将会促使整个背光模块的厚度大大增加。
发明内容
为了解决上述现有技术存在的问题，本发明提供一种能够在不增加厚度的同时提高亮度的背光模块。
根据本发明的一方面，提供了一种用于液晶显示器的背光模块，其包括：背框，其具有底板及位于所述底板侧端的侧板；导光板，其设置于所述底板之上，所述导光板包括平板体以及沿所述平板体的一端向上延伸的楔形体；光源，其设置于所述底板之上且位于所述楔形体与所述侧板之间；柔性电路板，其设置于所述光源和所述侧板之上且延伸至所述楔形体上。
进一步地，所述背光模块还包括黑白遮光胶，所述黑白遮光胶设置于所述柔性电路板和所述楔形体之间。
进一步地，所述背光模块还包括若干光学膜片，所述若干光学膜片设置于所述平板体之上。
进一步地，所述背光模块还包括胶框，所述胶框设置于所述光源与所述侧板之间。
进一步地，所述背光模块还包括反射片，所述反射片设置于所述导光板与所述底板之间。
进一步地，所述楔形体较厚的端面为邻近所述光源的入光端面(222a)，所述楔形体较薄的端面与所述平板体的一端平滑衔接。
进一步地，所述黑白遮光胶的一端抵接所述光源。
进一步地，所述楔形体的厚度与所述黑白遮光胶的厚度之和等于所述光源的直径。
进一步地，所述光学膜片的一端与所述黑白遮光胶的另一端对齐。
进一步地，所述反射片的一端延伸抵接所述侧板，其中，所述光源和所述胶框均设置在所述反射片之上。
本发明的有益效果：本发明的背光模块能够在不增加厚度的同时提高出射光亮度，以满足高解析度液晶面板所需。
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，相同的标号在整个说明书和附图中可用来表示相同的元件。
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的具体结构在此不再详细介绍，本领域的技术人员可参照现有技术中公开的液晶面板的具体结构。
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、光源230和柔性电路板(FPC)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包括平板体221及沿该平板体221一端延伸的楔形体222。该楔形体222较厚的端面为邻近背框210的侧板212的入光端面222a，该楔形体222较薄的端面与平板体221的一端平滑衔接。
光源230可例如是发光二极管(LED)，但本发明并不限制于此，例入光源230也可例如是冷阴极荧光灯管(CCFL)。光源230设置于背框210的底板211之上，并且光源230位于该楔形体222的入光端面222a与背框210的侧板212之间。
柔性电路板240设置于光源230和背框210的侧板212之上，并且柔性电路板240延伸至导光板220的楔形体222上。柔性电路板240通常用于电连接液晶面板100，用于向液晶面板100提供电源以及驱动控制信号等。
为了防止光源230发出的光线从光源230与该楔形体222的入光端面222a之间泄漏出去，根据本发明的实施例的背光模块200还包括黑白遮光胶250。该黑白遮光胶250设置在柔性电路板240与导光板220的楔形体222之间，并且该黑白遮光胶250的一端抵接光源230。在本实施例中，优选地，楔形体222的入光端面222a的厚度与黑白遮光胶250的厚度之和与光源230的直径相等，但本发明并不限制于此，例如，楔形体222的入光端面222a的厚度与黑白遮光胶250的厚度之和也可略大于光源230的直径。
根据本发明的实施例的背光模块200还包括若干光学膜片260。这些光学膜片260可包括增亮膜、扩散膜等，它们能够改善由导光板220的平板体221提供给液晶面板100的光线的品质。这些光学膜片260依次设置于导光板220的平板体221之上。优选地，每一光学膜片260的一端与黑白遮光胶250的另一端对齐，但本发明并不限制于此。
为了更好地将导光板220、光源230等固定在背框210中，根据本发明的实施例的背光模块200还包括胶框270。在图1中，仅示出了胶框270的一部分，这部分胶框270设置在光源230和背框210的侧板212之间。
根据本发明的实施例的背光模块200还包括反射片280。该反射片280设置于导光板220与背框210的底板211之间。优选地，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的部分设置于光源230与底板211之间以及胶框270与底板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。
如上所述，背光模块200与液晶面板100相对设置，具体地，液晶面板100设置于黑白遮光胶250之上。液晶面板100借用经若干光学膜片260改善之后的光线进行影像显示。
综上所述，根据本发明的实施例，能够在不改变背光模块厚度的同时大幅度提高背光模块的亮度。
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 (10)

1.一种用于液晶显示器的背光模块，其特征在于，包括：
背框(210)，其具有底板(211)及位于所述底板(211)侧端的侧板(212)；
导光板(220)，其设置于所述底板(211)之上，所述导光板(220)包括平板体(221)以及沿所述平板体(221)的一端向上延伸的楔形体(222)；
光源(230)，其设置于所述底板(211)之上且位于所述楔形体(222)与所述侧板(212)之间；
柔性电路板(240)，其设置于所述光源(230)和所述侧板(212)之上且延伸至所述楔形体(222)上。
2.根据权利要求1所述的背光模块，其特征在于，所述背光模块还包括黑白遮光胶(250)，所述黑白遮光胶(250)设置于所述柔性电路板(240)和所述楔形体(222)之间。
3.根据权利要求2所述的背光模块，其特征在于，所述背光模块还包括若干光学膜片(260)，所述若干光学膜片(260)设置于所述平板体(221)之上。
4.根据权利要求3所述的背光模块，其特征在于，所述背光模块还包括胶框(270)，所述胶框(270)设置于所述光源(230)与所述侧板(212)之间。
5.根据权利要求4所述的背光模块，其特征在于，所述背光模块还包括反射片(280)，所述反射片(280)设置于所述导光板(220)与所述底板(211)之间。
6.根据权利要求1至5任一项所述的背光模块，其特征在于，所述楔形体(222)较厚的端面为邻近所述光源(230)的入光端面(222a)，所述楔形体(222)较薄的端面与所述平板体(221)的一端平滑衔接。
7.根据权利要求2至5任一项所述的背光模块，其特征在于，所述黑白遮光胶(250)的一端抵接所述光源(230)。
8.根据权利要求2至5任一项所述的背光模块，其特征在于，所述楔形体(222)的厚度与所述黑白遮光胶(250)的厚度之和等于所述光源(230)的直径。
9.根据权利要求3至5任一项所述的背光模块，其特征在于，所述光学膜片(260)的一端与所述黑白遮光胶(250)的另一端对齐。
10.根据权利要求5所述的背光模块，其特征在于，所述反射片(280)的一端延伸抵接所述侧板(212)，其中，所述光源(230)和所述胶框(270)均设置在所述反射片(280)之上。
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