CN105093682B - 液晶显示器 - Google Patents

液晶显示器 Download PDF

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CN105093682B
CN105093682B CN201510568559.9A CN201510568559A CN105093682B CN 105093682 B CN105093682 B CN 105093682B CN 201510568559 A CN201510568559 A CN 201510568559A CN 105093682 B CN105093682 B CN 105093682B
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light
liquid crystal
crystal display
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green
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CN105093682A (zh
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梁宇恒
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TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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Priority to PCT/CN2015/091723 priority patent/WO2017041345A1/zh
Priority to US14/787,769 priority patent/US9740041B2/en
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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
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Abstract

本发明提供一种液晶显示器，通过在液晶显示面板中设置主要采用量子点材料制作的彩色发光层，提升了液晶显示器的色域表现，同时通过在液晶显示面板的出光侧设置单向导光薄膜，使得所述彩色发光层发出的光线可以透过所述单向导光薄膜往外传播，但是外部的光线被单向导光薄膜阻挡反射，不能传播到彩色发光层激发量子点发光，从而避免了传统的量子点显示器容易受到外部光线激发造成其对比度下降甚至色偏的问题，提升了液晶显示器的显示品质。

Description

液晶显示器
技术领域
本发明涉及液晶显示技术领域，尤其涉及一种液晶显示器。
背景技术
液晶显示装置(LCD，Liquid Crystal Display)具有机身薄、省电、无辐射等众多优点，得到了广泛的应用。如：液晶电视、移动电话、个人数字助理(PDA)、数字相机、计算机屏幕或笔记本电脑屏幕等。通常液晶显示装置包括壳体、设于壳体内的液晶显示面板及设于壳体内的背光模组(Backlight module)。其中，液晶显示面板的结构主要是由一薄膜晶体管阵列基板(Thin Film Transistor Array Substrate，TFT Array Substrate)、一彩色滤光片基板(Color Filter，CF)、以及配置于两基板间的液晶层(Liquid Crystal Layer)所构成，其工作原理是通过在两片玻璃基板上施加驱动电压来控制液晶层的液晶分子的旋转，将背光模组的光线折射出来产生画面。
量子点(Quantum Dots，QDs)材料是指粒径在1～100nm的半导体晶粒，由于量子点材料的粒径尺寸小于或者接近相应体材料的激子波尔半径，产生量子限域效应，其能级结构从体材料的准连续变为量子点材料的离散结构，导致量子点展示出特殊的受激辐射发光的性能。随着量子点的尺寸减小，其能级带隙增加，相应的量子点受激所需要的能量以及量子点受激后回到基态放出的能量都相应的增大，表现为量子点的激发与荧光光谱的“蓝移”现象，通过控制量子点的尺寸，使其发光光谱半高宽窄并可以覆盖整个可见光区域。例如CdSe量子点的尺寸从6.6nm减小至2.0nm，其发光波长从红光区域635nm“蓝移”至蓝光区域的460nm。
量子点材料拥有发光波长可控、半高宽窄的优点，现有的一种量子点材料的应用技术采用由不同发光波长量子点制成的彩色发光层来替代目前液晶显示装置里面的彩色滤光片，可以解决蓝光LED加黄色荧光粉在光谱分布上面的缺陷，提高显示器的色域；但是，由于该彩色发光层一般设置于液晶显示器的靠近外部的位置，外部的自然光会对量子点进行激发，因此在明亮的环境下显示器的对比度下降，且有可能产生色偏的现象。
发明内容
本发明的目的在于提供一种液晶显示器，采用主要由量子点制作的彩色发光层代替传统的彩色滤光片，同时通过在液晶显示面板的出光侧设置单向导光薄膜，使得外部光线不能进入液晶显示面板内激发量子点材料发光，避免量子点被外部光线激发导致的显示器对比度下降和色偏等问题。
为实现上述目的，本发明提供一种液晶显示器，包括液晶显示面板与背光源；所述液晶显示面板包括相对设置的上基板与下基板、及设于所述上基板与下基板之间的液晶层；
所述上基板包括第一基板、设于所述第一基板上方的彩色发光层、设于所述彩色发光层上方的单向导光薄膜、设于所述第一基板下方的上偏光片、及设于所述上偏光片下方的第一配向膜；
所述下基板包括第二基板、设于所述第二基板下方的下偏光片、设于所述第二基板上方的薄膜晶体管层、及设于所述薄膜晶体管层上方的第二配向膜；
所述彩色发光层包括数个红色子像素区域、数个绿色子像素区域、及数个蓝色子像素区域，所述红色子像素区域包含发光波长为610-650nm的红光量子点，所述绿色子像素区域包含发光波长为510-540nm的绿光量子点，所述蓝色子像素区域包含发光波长为410-440nm的蓝光量子点或者所述蓝色子像素区域为透明材料，所述彩色发光层的红、绿、蓝色子像素区域在所述背光源发出的光线的照射下分别发出红、绿、蓝光；
所述彩色发光层发出的光线可以透过所述单向导光薄膜往外传播，但是外部的光线被单向导光薄膜阻挡反射，从而不能传播到彩色发光层激发量子点发光。
所述背光源为蓝光光源或紫外线光源。
所述蓝色子像素区域包含发光波长为410-440nm的蓝光量子点，所述背光源为紫外线光源，所述红色、绿色、蓝色子像素区域中的红光、绿光、蓝光量子点分别在紫外线的激发下发出红、绿、蓝光。
所述蓝色子像素区域为透明材料，所述背光源为蓝光光源，所述红色子像素区域中的红光量子点与所述绿色子像素区域中的绿光量子点分别在蓝光的激发下发出红光与绿光，所述蓝光穿过所述蓝色子像素区域中的透明材料，使蓝色子像素区域发出蓝光。
所述红光量子点、绿光量子点、及蓝光量子点的材料为Ⅱ-Ⅵ族量子点材料、Ⅲ-Ⅴ族量子点材料、Ⅰ-Ⅲ-Ⅵ族量子点材料中的一种或多种。
所述红光量子点、绿光量子点、及蓝光量子点的材料为CdSe、CdS、CdTe、ZnS、ZnSe、CuInS、ZnCuInS中的一种或多种。
所述上偏光片的偏光方向与下偏光片的偏光方向互相垂直或互相平行。
所述液晶显示器还包括黑色矩阵，所述黑色矩阵设置于所述上基板或下基板中、或者在上基板和下基板中均有设置。
所述第一基板与第二基板均为透明基板。
所述单向导光薄膜具有导光面与出光面，所述导光面上设有并排连续的数个凸棱，所述凸棱的顶部设置有尖角反射部，所述尖角反射部的两反射面与所述凸棱的两斜立面贴合，所述出光面为平滑表面；所述导光面靠近彩色发光层设置。
本发明的有益效果：本发明提供的一种液晶显示器，通过在液晶显示面板中设置主要采用量子点材料制作的彩色发光层，提升了液晶显示器的色域表现，同时通过在液晶显示面板的出光侧设置单向导光薄膜，使得所述彩色发光层发出的光线可以透过所述单向导光薄膜往外传播，但是外部的光线被单向导光薄膜阻挡反射，不能传播到彩色发光层激发量子点发光，从而避免了传统的量子点显示器容易受到外部光线激发造成其对比度下降甚至色偏的问题，提升了液晶显示器的显示品质。
附图说明
为了能更进一步了解本发明的特征以及技术内容，请参阅以下有关本发明的详细说明与附图，然而附图仅提供参考与说明用，并非用来对本发明加以限制。
附图中，
图1为本发明的液晶显示器第一实施例的结构示意图；
图2为本发明的液晶显示器第二实施例的结构示意图；
图3为本发明的液晶显示器中的单向导光薄膜的剖面结构示意图。
具体实施方式
为更进一步阐述本发明所采取的技术手段及其效果，以下结合本发明的优选实施例及其附图进行详细描述。
请参阅图1-2，本发明提供一种液晶显示器，其包括液晶显示面板200与背光源100/100’；所述液晶显示面板200包括相对设置的上基板2与下基板1、及设于所述上基板2与下基板1之间的液晶层3；
所述上基板2包括第一基板24、设于所述第一基板24上方的彩色发光层22、设于所述彩色发光层22上方的单向导光薄膜21、设于所述第一基板24下方的上偏光片25、及设于所述上偏光片25下方的第一配向膜26；
所述下基板1包括第二基板12、设于所述第二基板12下方的下偏光片11、设于所述第二基板12上方的薄膜晶体管层13、及设于所述薄膜晶体管层13上方的第二配向膜14；
所述彩色发光层22包括数个红色子像素区域221、数个绿色子像素区域222、及数个蓝色子像素区域223/223’，所述红色子像素区域221包含发光波长为610-650nm的红光量子点，所述绿色子像素区域222包含发光波长为510-540nm的绿光量子点，所述蓝色子像素区域223/223’包含发光波长为410-440nm的蓝光量子点或者所述蓝色子像素区域223/223’为透明材料，所述彩色发光层22的红、绿、蓝色子像素区域221、222、223/223’在所述背光源100/100’发出的光线的照射下分别发出红、绿、蓝光；
所述彩色发光层22发出的光线可以透过所述单向导光薄膜21往外传播，但是外部的光线被单向导光薄膜21阻挡反射，从而不能传播到彩色发光层22激发量子点发光。
具体的，所述背光源100/100’为蓝光光源或紫外线光源。
如图1所示，为本发明液晶显示器的第一实施例，在该实施例中，所述蓝色子像素区域223包含发光波长为410-440nm的蓝光量子点，所述背光源100为紫外线光源，所述红色、绿色、蓝色子像素区域221、222、223中的红光、绿光、蓝光量子点分别在紫外线的激发下发出红、绿、蓝光。
如图2所示，为本发明液晶显示器的第二实施例，在该实施例中，所述蓝色子像素区域223’为透明材料，所述背光源100’为蓝光光源，所述红色子像素区域221中的红光量子点与所述绿色子像素区域222中的绿光量子点分别在蓝光的激发下发出红光与绿光，所述蓝光穿过所述蓝色子像素区域223’中的透明材料，使蓝色子像素区域223’发出蓝光。
优选的，所述透明材料为透明光阻。
具体的，所述红光量子点、绿光量子点、及蓝光量子点的材料为Ⅱ-Ⅵ族量子点材料、Ⅲ-Ⅴ族量子点材料、Ⅰ-Ⅲ-Ⅵ族量子点材料中的一种或多种。
优选的，所述红光量子点、绿光量子点、及蓝光量子点的材料为CdSe、CdS、CdTe、ZnS、ZnSe、CuInS、ZnCuInS中的一种或多种。
具体的，所述上偏光片25的偏光方向与下偏光片11的偏光方向互相垂直或互相平行；当所述上偏光片25的偏光方向与下偏光片11的偏光方向互相垂直时，所述液晶显示器为常暗模式；当所述上偏光片25的偏光方向与下偏光片11的偏光方向互相平行时，所述液晶显示器为常亮模式。
具体的，所述液晶显示器还包括黑色矩阵23，所述黑色矩阵23设置于所述上基板2或下基板1中、或者在上基板2和下基板1中均有设置。
具体的，所述第一基板24与第二基板12均为透明基板。优选的，所述第一基板24与第二基板12均为玻璃基板。
如图3所示，所述单向导光薄膜21具有导光面211与出光面212，所述导光面211上设有并排连续的数个凸棱210，所述凸棱210的顶部设置有尖角反射部2103，所述尖角反射部2103的两反射面与所述凸棱210的两斜立面贴合，所述出光面212为平滑表面。具体的，所述导光面211靠近彩色发光层22设置。
具体的，所述尖角反射部2103为金属反射层，该金属材料可以是铝、银或钛。
具体的，所述单向导光薄膜21的工作原理为：光线由光疏介质照射到所述导光面211上，经导光面211反射和折射进入单向导光薄膜21，由所述出光面212导出，该方向为所述单向导光薄膜21的导光方向；光线由所述出光面212进入单向导光薄膜21，照射到所述导光面211上，经导光面211反射由所述出光面212导出，该方向为所述单向导光薄膜21的阻光方向。所述单向导光薄膜21通过在导光面211的凸棱210顶部设置尖角反射部2103，调整尖角角度，使单向导光薄膜21导光方向的光经过反射层反射进入另一侧，单向导光薄膜21阻光方向的光由于全反射和反射层被反射回来，实现了单向导光。
综上所述，本发明提供的一种液晶显示器，通过在液晶显示面板中设置主要采用量子点材料制作的彩色发光层，提升了液晶显示器的色域表现，同时通过在液晶显示面板的出光侧设置单向导光薄膜，使得所述彩色发光层发出的光线可以透过所述单向导光薄膜往外传播，但是外部的光线被单向导光薄膜阻挡反射，不能传播到彩色发光层激发量子点发光，从而避免了传统的量子点显示器容易受到外部光线激发造成其对比度下降甚至色偏的问题，提升了液晶显示器的显示品质。
以上所述，对于本领域的普通技术人员来说，可以根据本发明的技术方案和技术构思作出其他各种相应的改变和变形，而所有这些改变和变形都应属于本发明后附的权利要求的保护范围。

Claims (10)

1.一种液晶显示器，其特征在于，包括液晶显示面板(200)与背光源(100/100’)；所述液晶显示面板(200)包括相对设置的上基板(2)与下基板(1)、及设于所述上基板(2)与下基板(1)之间的液晶层(3)；
所述上基板(2)包括第一基板(24)、设于所述第一基板(24)上方的彩色发光层(22)、设于所述彩色发光层(22)上方的单向导光薄膜(21)、设于所述第一基板(24)下方的上偏光片(25)、及设于所述上偏光片(25)下方的第一配向膜(26)；
所述下基板(1)包括第二基板(12)、设于所述第二基板(12)下方的下偏光片(11)、设于所述第二基板(12)上方的薄膜晶体管层(13)、及设于所述薄膜晶体管层(13)上方的第二配向膜(14)；
所述彩色发光层(22)包括数个红色子像素区域(221)、数个绿色子像素区域(222)、及数个蓝色子像素区域(223/223’)，所述红色子像素区域(221)包含发光波长为610-650nm的红光量子点，所述绿色子像素区域(222)包含发光波长为510-540nm的绿光量子点，所述蓝色子像素区域(223/223’)包含发光波长为410-440nm的蓝光量子点或者所述蓝色子像素区域(223/223’)为透明材料，所述彩色发光层(22)的红、绿、蓝色子像素区域(221、222、223/223’)在所述背光源(100/100’)发出的光线的照射下分别发出红、绿、蓝光；
所述彩色发光层(22)发出的光线可以透过所述单向导光薄膜(21)往外传播，但是外部的光线被单向导光薄膜(21)阻挡反射，从而不能传播到彩色发光层(22)激发量子点发光。
2.如权利要求1所述的液晶显示器，其特征在于，所述背光源(100/100’)为蓝光光源或白光光源或紫外线光源。
3.如权利要求1所述的液晶显示器，其特征在于，所述蓝色子像素区域(223)包含发光波长为510-540nm的蓝光量子点，所述背光源(100)为紫外线光源，所述红色、绿色、蓝色子像素区域(221、222、223)中的红光、绿光、蓝光量子点分别在紫外线的激发下发出红、绿、蓝光。
4.如权利要求1所述的液晶显示器，其特征在于，所述蓝色子像素区域(223’)为透明材料，所述背光源(100’)为蓝光光源，所述红色子像素区域(221)中的红光量子点与所述绿色子像素区域(222)中的绿光量子点分别在蓝光的激发下发出红光与绿光，所述蓝光穿过所述蓝色子像素区域(223’)中的透明材料，使蓝色子像素区域(223’)发出蓝光。
5.如权利要求1所述的液晶显示器，其特征在于，所述红光量子点、绿光量子点、及蓝光量子点的材料为Ⅱ-Ⅵ族量子点材料、Ⅲ-Ⅴ族量子点材料、Ⅰ-Ⅲ-Ⅵ族量子点材料中的一种或多种。
6.如权利要求5所述的液晶显示器，其特征在于，所述红光量子点、绿光量子点、及蓝光量子点的材料为CdSe、CdS、CdTe、ZnS、ZnSe、CuInS、ZnCuInS中的一种或多种。
7.如权利要求1所述的液晶显示器，其特征在于，所述上偏光片(25)的偏光方向与下偏光片(11)的偏光方向互相垂直或互相平行。
8.如权利要求1所述的液晶显示器，其特征在于，所述液晶显示器还包括黑色矩阵(23)，所述黑色矩阵(23)设置于所述上基板(2)或下基板(1)中、或者在上基板(2)和下基板(1)中均有设置。
9.如权利要求1所述的液晶显示器，其特征在于，所述第一基板(24)与第二基板(12)均为透明基板。
10.如权利要求1所述的液晶显示器，其特征在于，所述单向导光薄膜(21)具有导光面(211)与出光面(212)，所述导光面(211)上设有并排连续的数个凸棱(210)，所述凸棱(210)的顶部设置有尖角反射部(2103)，所述尖角反射部(2103)的两反射面与所述凸棱(210)的两斜立面贴合，所述出光面(212)为平滑表面；所述导光面(211)靠近彩色发光层(22)设置。
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