CN101520562A - 液晶显示装置 - Google Patents

液晶显示装置 Download PDF

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CN101520562A
CN101520562A CN200810100885A CN200810100885A CN101520562A CN 101520562 A CN101520562 A CN 101520562A CN 200810100885 A CN200810100885 A CN 200810100885A CN 200810100885 A CN200810100885 A CN 200810100885A CN 101520562 A CN101520562 A CN 101520562A
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panel
liquid crystal
optical film
crystal indicator
projection
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CN101520562B (zh
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崔贤植
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BOE Technology Group Co Ltd
Gaochuang Suzhou Electronics Co Ltd
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Beijing BOE Optoelectronics Technology Co Ltd
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    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/133308Support structures for LCD panels, e.g. frames or bezels
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011Light 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
    • G02B6/0081Mechanical 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
    • G02B6/0086Positioning aspects
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    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/133308Support structures for LCD panels, e.g. frames or bezels
    • G02F1/133317Intermediate frames, e.g. between backlight housing and front frame
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336Illuminating devices
    • G02F1/133602Direct backlight
    • G02F1/133608Direct backlight including particular frames or supporting means
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    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336Illuminating devices
    • G02F1/133615Edge-illuminating devices, i.e. illuminating from the side
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
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    • G02OPTICS
    • G02FOPTICAL 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
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    • G02OPTICS
    • G02FOPTICAL 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
    • G02F2201/00Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
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Abstract

本发明涉及一种液晶显示装置,包括背光模组、光学膜层、面板、模框架和外框架,其中,面板和光学膜层之间设置有保护层,保护层用于在面板弯曲时支撑面板;模框架上设有第一凸起和第二凸起,且第一凸起位于面板和保护层之间,第二凸起位于保护层和光学膜层之间。本发明采用在面板和光学膜层之间设置保护层的技术手段,减小了面板受力弯曲时的可弯曲空间,即减小了面板受力时的弯曲度,进而减小了黑矩阵的偏移量,能够减轻在面板弯曲时的漏光现象。同时因为两个凸起的间隔使得保护层两侧留有间隙,能够避免液晶显示装置中面板和光学膜层的摩擦,提高产品的耐久性。

Description

液晶显示装置
技术领域
本发明涉及一种液晶显示装置,尤其涉及一种薄膜晶体管液晶显示装置。
背景技术
液晶显示装置是目前常用的平板显示装置之一,以薄膜晶体管液晶显示装置(Thin Film Transistor-Liquid Crystal Display,以下简称TFT-LCD)为例,其一般结构如图1所示,通常包括由下而上设置的背光模组(BlackLight Unit,简称BLU)10、光学膜层(sheet)20、彩膜基板(CF)31和阵列基板(Array)32对盒形成的面板(panel)30,还包括设置在背光模组10、光学膜层20和面板30侧边、起到固定与连接作用的模框架50(mold frame),以及设置在背光模组10、光学膜层20、面板30、模框架50最外层的外框架40。其中的背光模组10一般包括导光板11,设置在导光板11两侧的背光灯12,围绕在背光灯12和导光板11外侧的背光板13。其中的光学膜层20一般由扩散膜、棱镜膜等结构组成,对导光板11射向面板30的光进行处理,各种膜层的组合可统称为光学膜层20。面板30由彩膜基板31和阵列基板32对盒组成,在两基板之间设置液晶层。外框架40是用于支撑液晶显示装置的功能部件,设置在四周。模框架50是采用注塑形式形成的,起固定面板30和连接背光模组10、光学膜层20、面板30的作用,在其上形成有一个凸起,可以保持面板30与光学膜层20之间的间距,此间距一般为1.0mm左右。
在液晶显示装置中,面板30的具体结构如图2所示。在彩膜基板31的内侧设置有黑矩阵(Block Matrix,简称BM)311,用于遮挡阵列基板32上的功能元件;在阵列基板32上,除TFT开关元件之外,通常设置有液晶像素电极(IT0)322阵列、数据线(Data)323、和设置在数据线323与液晶像素电极322之间的挡光条(S/B)324。液晶显示装置在应用过程中,可能从挡光条324和数据线323的间隙中会漏过从导光板射入的光线,如图2所示,产生漏出光线的原因是:彩膜基板上的像素电极(CF IT0)与阵列基板上的像素电极(Array pixel ITO)和数据线之间形成了扭曲电场,而导致旋转位移区域,即缝隙的形成。漏出的光线,大部分会被彩膜基板31上设置的黑矩阵311所遮挡。但是,该技术存在的问题是:当液晶显示装置受到外力作用时,可能使得面板向下凸起弯曲,如图3所示。原本设定在适当位置用于遮光的黑矩阵311将错开一定的距离d2,如图4所示,则挡光条324和数据线323的间隙中漏出的光线会从此错开的缝隙中漏出。面板弯曲程度越大,则黑矩阵311的偏移距离越大,进而漏光现象越严重。产生这种漏光现象后,呈现给观看者的效果就是液晶显示装置表面出现了水波纹(Touch mora)现象。
现有的液晶显示装置结构如图1所示,为了防止接触磨损,通常要在阵列基板32和光学膜层20之间保留一定距离的缝隙,如图1中所示的长度为d1的缝隙,受注塑工艺限制,且为满足避免磨损功能的要求,d1的长度一般设定为1.0毫米左右。这个缝隙的存在将使得面板30的可弯曲度较大,从而使漏光现象和水波纹现象更加严重。
现有技术中,为避免漏光和水波纹现象所采用的一种方案为扩大彩膜基板上设置的黑矩阵的面积,这样使得黑矩阵在偏移一定距离后,仍然能够对应遮挡从挡光条和数据线的间隙中漏出的光。但是这种技术方案引起了另一个问题,就是增加了液晶显示装置上黑矩阵的遮挡面积,减少了可透光的面积,即降低了开口率,使得液晶显示装置的亮度降低,显示效果下降。
发明内容
本发明的目的是提供一种液晶显示装置,以减小在显示图像时出现漏光和水波纹现象的可能,从而改善液晶显示装置的显示效果。
为实现上述目的,本发明提供了一种液晶显示装置,包括背光模组、光学膜层、面板、模框架和外框架,其中,面板和光学膜层之间还设置有保护层,保护层用于在面板弯曲时支撑面板;模框架上设有第一凸起和第二凸起,且第一凸起位于面板和保护层之间,第二凸起位于保护层和光学膜层之间。
由以上技术方案可知,本发明采用在面板和光学膜层之间设置保护层的技术手段,减小了面板受力弯曲时的可弯曲空间,即减小了面板受力时的弯曲度,进而减小了黑矩阵的偏移量,能够减轻在面板弯曲时的漏光现象,从而减少了显示中因漏光出现水波纹现象的可能,改善了显示效果。同时,在面板和光学膜层之间设置保护层,能够避免液晶显示装置中面板和光学膜层的摩擦,提高产品的耐久性。并且相比于现有技术所采用的增大黑矩阵面积的技术手段,本发明的技术方案没有降低液晶显示装置的开口率,对光线透射率和显示亮度基本没有影响。
下面通过具体实施例并结合附图对本发明做进一步的详细描述。
附图说明
图1为现有技术中一种液晶显示装置的结构示意图;
图2为现有技术液晶显示装置中面板的结构示意图;
图3为现有技术中液晶显示装置受力弯曲的状态示意图;
图4为现有技术液晶显示装置中面板弯曲后的状态示意图;
图5为本发明液晶显示装置具体实施例一的结构示意图;
图6为本发明液晶显示装置具体实施例一的弯曲状态示意图;
图7为本发明液晶显示装置具体实施例二的结构示意图。
图中:
10-背光模组        11-导光板          12-背光灯
13-背光板          20-光学膜层        30-面板
31-彩膜基板         311-黑矩阵           32-阵列基板
322-液晶像素电极    323-数据线           324-挡光条
40-外框架           50-模框架            51-上模框架
52-下模框架         510-第一凸起         520-第二凸起
60-保护层
具体实施方式
实施例一
如图5所示为本发明液晶显示装置具体实施例一的结构示意图,该液晶显示装置包括:由下而上设置的背光模组10、光学膜层20和面板30,以及设置在侧边的外框架40,和设置在外框架40与背光模组10、光学膜层20和面板30间隙中的模框架50,并且,在面板30和光学膜层20之间设置有保护层60,该保护层60用于在面板30弯曲时对面板30起支撑作用。
本实施例的液晶显示装置中,背光模组10具体包括:导光板11、设置在导光板11两侧的背光灯12、围绕在背光灯12和导光板11外侧的背光板13。光学膜层20具体由偏振膜,棱镜膜等结构组成。面板30由彩膜基板31和阵列基板32对盒形成,彩膜基板31和阵列基板32之间设置有液晶层,在彩膜基板31、阵列基板32上设置有黑矩阵、像素电极、TFT开关元件等TFT-LCD上的常规部件。
本实施例中,可以适应背光模组10、光学膜层20、保护层60和面板30的结构,在模框架50上设置两个凸起,即第一凸起510和第二凸起520,第一凸起510位于面板30和保护层60之间,第二凸起520位于保护层60和光学膜层20之间。两个凸起在面板30和光学膜层20之间的间隔对应的该段模框架50大约二分之一处,形成一个凹槽,凹槽之中容纳固定保护层60。
在本实施例中,保护层可采用对光线透射率影响小,或称最小限度引起光线传输相位延迟的材质,例如玻璃、聚对苯二甲酸乙二酯(简称PET)、三醋酸纤维素(简称TAC)膜或塑料(plastic)等透明材料。该保护层不仅可以为完整平面的膜层,还可以为格状等形式的膜层,对面板的弯曲能够起到支撑作用即可。较佳的可设置保护层的厚度d3为0.4~0.5毫米,设置保护层与光学膜层之间的间隙距离即第二凸起的厚度d4为0.2~0.3毫米,设置保护层与面板之间的间隙距离即第一凸起的厚度d5为0.2~0.3毫米。
本实施例的液晶显示装置在应用中,当其受力弯曲时,面板的弯曲状态如图6所示。在面板和光学膜层之间设置有保护层,能够减小面板在受力弯曲时的可弯曲空间。当面板受力弯曲时,因为有保护层的支撑,所以减小了面板在受力时的弯曲程度,进而能够减小彩膜基板上黑矩阵的偏移距离,最终达到减少漏光、水波纹现象的出现、改善显示效果的目的。本实施例的技术方案,在保护层两侧通过设置凸起,能够留有适当的间隙,特别是保护层和光学膜层之间留有间距,能够保护光学膜层,避免液晶显示装置中面板和光学膜层的摩擦,减少磨损,提高产品的耐久性。另外,相比于现有技术增加黑矩阵面积来减少漏光量的技术方案,本实施例的技术方案没有增加黑矩阵的面积,也就没有降低液晶显示装置的开口率,对光线透射率和显示亮度基本没有影响。
实施例二
如图7所示为本发明液晶显示装置具体实施例二的结构示意图。本实施例的液晶显示装置与实施例一基本相同,区别在于模框架的结构。在实施例一中,模框架为一个整体,其上形成有第一凸起和第二凸起,保护层卡设在两个凸起之间来进行固定。而在本实施例中,模框架为分别形成但贴合在一起的两个注塑结构,即上模框架51和下模框架52。上模框架51上设置第一凸起510,下模框架52上设置第二凸起520,第一凸起510和第二凸起520用于配合卡设固定保护层60。
在注塑工艺的实际应用中,要在同一模框架上形成两个间隔较小的凸起,其工艺实现上较为困难。注塑材料进入相隔较近的两个间隙形成两个凸起的尺寸有一定的限制,一般允许两凸起的最小间隔为1.0~1.1毫米左右。另一方面,注塑材料形成的每个凸起的最小厚度值可达0.2~0.3毫米左右。采用本实施例的技术方案,可以减小注塑工艺的难度,便于形成间隔较小的两凸起。
最后应说明的是:以上实施例仅用以说明本发明的技术方案,而非对其限制;尽管参照前述实施例对本发明进行了详细的说明,本领域的普通技术人员应当理解:其依然可以对前述各实施例所记载的技术方案进行修改,或者对其中部分技术特征进行等同替换;而这些修改或者替换,并不使相应技术方案的本质脱离本发明各实施例技术方案的精神和范围。

Claims (6)

1、一种液晶显示装置,包括背光模组、光学膜层、面板、模框架和外框架,其特征在于:所述光学膜层和所述面板之间还设置有保护层,所述保护层用于在所述面板弯曲时支撑所述面板;所述模框架上设有第一凸起和第二凸起,且所述第一凸起位于所述面板和所述保护层之间,所述第二凸起位于所述保护层和所述光学膜层之间。
2、根据权利要求1所述的液晶显示装置,其特征在于:所述保护层的材质为玻璃、三醋酸纤维素、聚对苯二甲酸乙二酯或塑料。
3、根据权利要求1所述的液晶显示装置,其特征在于:所述保护层的厚度为0.4~0.5毫米。
4、根据权利要求1所述的液晶显示装置,其特征在于:所述第一凸起的厚度为0.2~0.3毫米。
5、根据权利要求1所述的液晶显示装置,其特征在于:所述第二凸起的厚度为0.2~0.3毫米。
6、根据权利要求1~5所述的任一液晶显示装置,其特征在于:所述模框架包括贴合设置的上模框架和下模框架,所述第一凸起设置在所述上模框架上,所述第二凸起设置在所述下模框架上。
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