CN105807494A - 背光模组及具有该背光模组的液晶显示器 - Google Patents

背光模组及具有该背光模组的液晶显示器 Download PDF

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CN105807494A
CN105807494A CN201610362488.1A CN201610362488A CN105807494A CN 105807494 A CN105807494 A CN 105807494A CN 201610362488 A CN201610362488 A CN 201610362488A CN 105807494 A CN105807494 A CN 105807494A
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light source
quantum dot
green
dot film
backlight module
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CN105807494B (zh
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程艳
陈仕祥
韩梅
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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 US15/112,525 priority patent/US10185074B2/en
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    • G—PHYSICS
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    • 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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    • G02F1/133603—Direct backlight with LEDs
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    • 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
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    • 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
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    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
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    • 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
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    • 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

本发明一方面提供了一种背光模组，其用于液晶显示器；所述背光模组包括量子点膜、导光板及光源模块，所述光源模块发出的光经所述导光板进入所述量子点膜，所述量子点膜包括有效区和失效区，所述光源模块包括蓝光光源和绿光光源，所述蓝光光源与所述有效区的位置对应，所述绿色光源与所述失效区的位置对应。本发明的还提供了一种具有该背光模组的液晶显示器。本发明提供的背光模组及液晶显示器的量子点膜采用绿色光源弥补因裁切时导致的失效区的失效的缺陷，具有更高的色域转换功能。

Description

背光模组及具有该背光模组的液晶显示器
技术领域
本发明涉及液晶显示领域，尤其是涉及一种背光模组及具有该背光模组的液晶显示器。
背景技术
现有的薄膜晶体管液晶显示器(ThinFilmTransistor-LiquidCrystalDisplay，TFT-LCD)的色域水平通常比较低，一般仅在72％左右。目前，为了提高TFT-LCD的色域水平，主要采用量子点(QuantumDot，QD)膜来实现高色域转换，即，将量子点封装于玻璃管中，将玻璃管置于蓝光发光二极管与导光板之间。然而，量子点膜的裁切部位容易有水氧的渗入，量子点在这种含水含氧的环境中易失效，其中，绿色量子点相较于红色量子点的直径较小10000，表面能高，更易与水氧反应失效，从而形成呈紫红色的失效区。对于边框较窄的移动产品而言，裁切部位失效会导致量子点膜无法较好的运用于产品中。
针对上述技术存在的问题，在本领域中希望寻求一种能够弥补量子点膜在裁切时存在的裁切部位失效的缺陷，从而实现量子点膜具有更高的色域转换功能，以解决现有技术中的不足之处。
发明内容
本发明提供一种背光模组，其能够弥补量子点膜在裁切时存在的裁切部位失效的缺陷，使得量子点膜具有更高的色域转换功能。
本发明还提供一种具有所述背光模组的液晶显示器。
本发明一方面提供了一种背光模组，其用于液晶显示器，所述背光模组包括量子点膜、导光板及光源模块，所述光源模块发出的光经所述导光板进入所述量子点膜，所述量子点膜包括有效区和失效区，所述光源模块包括蓝光光源和绿光光源，所述蓝光光源与所述有效区的位置对应，所述绿色光源与所述失效区的位置对应。
其中，所述绿光光源发出的绿光与所述蓝光光源发出的蓝光经由所述导光板进入所述量子点膜，并与所述量子点膜的失效区的红光相互混合而成白光。
其中，所述失效区位于所述有效区的周围，所述蓝光光源位于所述绿光光源之间。
其中，所述光源模块为LED灯条，所述蓝光光源为蓝光LED，所述绿色光源为绿光LED，所述蓝光LED位于所述LED灯条的中间位置，所述绿色LED位于所述LED灯条的两端。
其中，所述量子点膜的上下两个表面还设置有保护层。
本发明另一方面提供了一种液晶显示器，其包括背光模组、依次设置于该背光模组上的晶体管层及面板，所述背光模组包括量子点膜、导光板及光源模块，所述光源模块发出的光经所述导光板进入所述量子点膜，所述量子点膜包括有效区和失效区，所述光源模块包括蓝光光源和绿光光源，所述蓝光光源与所述有效区的位置对应，所述绿色光源与所述失效区的位置对应。
其中，所述液晶显示器还包括反射层，所述反射层设置于所述导光板背对所述量子点膜的一侧。
相较于现有技术，在本发明提供的背光模组中，通过在对应于所述量子点膜的失效区的位置设置所述绿色光源，则该绿光光源发出的绿光与该蓝光光源发出的蓝光、及所述量子点膜的失效区的发出红光相互混合而成白光，从而有效地弥补了因量子点膜在裁切时导致的失效区的失效的缺陷，解决了所述量子点膜边缘失效显示异常的问题，进一步提高了量子点膜的色域转换功能，从而使得该液晶显示器也具有更高的色域显示。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本发明的实施例的液晶显示器的剖面图。
图2为本发明的实施例的量子点膜的平面示意图。
图3为本发明的实施例的背光模组的俯视图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
此外，以下各实施例的说明是参考附加的图示，用以例示本发明可用以实施的特定实施例。本发明中所提到的方向用语，例如，“上”、“下”、“前”、“后”、“左”、“右”、“内”、“外”、“侧面”等，仅是参考附加图式的方向，因此，使用的方向用语是为了更好、更清楚地说明及理解本发明，而不是指示或暗指所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。
在本发明的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸地连接，或者一体地连接；可以是机械连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本发明中的具体含义。
此外，在本发明的描述中，除非另有说明，“多个”的含义是两个或两个以上。若本说明书中出现“工序”的用语，其不仅是指独立的工序，在与其它工序无法明确区别时，只要能实现该工序所预期的作用则也包括在本用语中。另外，本说明书中用“～”表示的数值范围是指将“～”前后记载的数值分别作为最小值及最大值包括在内的范围。在附图中，结构相似或相同的单元用相同的标号表示。
请参阅图1，图1为本发明的实施例的液晶显示器的剖面图。如图1所示，该液晶显示器100包括背光模组10、依次设置于该背光模组10上的薄膜晶体管(ThinFilmTransistor，TFT)基板20及彩色滤光片(ColorFilter)30。
该背光模组10包括量子点膜11、导光板13及光源模块15，其中，所述量子点膜11设置于所述导光板13上，并位于所述TFT基板20背对所述彩色滤光片30的一侧，即，所述量子点膜11位于所述TFT基板20与所述导光板13之间。较佳地，所述彩色滤光片30、所述TFT基板20、所述量子点膜11及所述导光板13从上到下依次层叠设置。该光源模块15位于导光板13的一端，其发出的光经该导光板13进入该量子点膜11，并经由该量子点膜11进入所述彩色滤光片30(如图1中光线传输示意图所示)。
请一并参阅图2，图2为本发明的实施例的量子点膜11的平面示意图。具体为，所述量子点膜11包括有效区111和失效区113。该有效区111为所述量子点膜11的中心区域，定义为该量子点膜11上色域转换效率较高的区域，蓝色光线经过该有效区111发出白光。该失效区113为所述量子点膜11的周缘区域，其位于所述有效区111的周围，定义为该量子点膜11上色域转换效率较低的区域。所述失效区113一般为该量子点膜11的剪裁边缘，蓝色光线经过该失效区113发出红光，即形成呈紫红色的失效区。
请一并参阅图3，图3为本发明的实施例的背光模组10的俯视图。该光源模块15包括蓝光光源151和绿光光源153，在本较佳实施例中，该蓝光光源151的数量为七个，该绿光光源153的数量为两个，其中，所述蓝光光源151位于所述绿光光源153之间，具体地，该蓝光光源151与所述有效区111的所在位置对应，该绿色光源153与所述失效区113的所在位置对应。该蓝色光源151的光线经过该有效区111后发出白光。该绿光光源153发出的绿光与该蓝光光源151发出的蓝光经由所述导光板13后进入所述量子点膜11，并与所述量子点膜11的失效区113的发出红光相互混合而成白光，从而有效地弥补了因所述量子点膜11在裁切时导致所述失效区113失效的缺陷，即，弥补了该量子点膜11的边缘区域因缺少绿色而引起的紫红现象，使得该边缘区域(即失效区113)由紫红色变为与所述有效区111一致的白色，从而解决了所述量子点膜11边缘区域显示异常的问题，进一步提高了所述量子点膜11的色域转换功能。可以理解，在其他实施例中，所述蓝光光源151的数量并不局限为七个，该绿光光源153的数量也局限为两个，二者均还可以为其他数量个，其中，该蓝光光源151与所述有效区111的所在位置对应，该绿色光源153与所述失效区113的所在位置对应。
在本较佳实施例中，该光源模块15可为发光二极管(LightEmittingDiode，LED发光二极管)灯条，该蓝光光源151可为蓝光LED，该绿色光源153为绿光LED。其中，该蓝光LED位于该LED灯条的中间位置，该绿色LED位于该LED灯条的两端。
可以理解，所述量子点膜11的朝向所述薄膜晶体管基板20及所述导光板13的表面还可设置有保护层(图未示)。该保护层一方面可用于使量子点膜11的表面更平整，另一方面使其能够很好地保护量子点膜11，充分保证其色域转换功能。
可以理解，在本发明的实施例中，所述液晶显示器100还包括反射层40，该反射层40设置于所述背光模组10下方。具体地，所述反射层40设置于所述背光模组10的导光板13背对所述量子点膜11的一侧，该反射层40可将露出所述导光板13底面的光线反射回该导光板13中，用来提高光线的使用效率，进一步提高亮度和能效。
本发明实施例提供的背光模组10中，通过在对应于所述量子点膜11的失效区113的位置设置所述绿色光源153，则该绿光光源153发出的绿光与该蓝光光源151发出的蓝光、及所述量子点膜11的失效区113的发出红光相互混合而成白光，从而有效地弥补了因量子点膜11在裁切时导致的失效区113的失效(即，该量子点膜11的边缘区域因缺少绿色而引起的紫红现象)的缺陷，解决了所述量子点膜11边缘失效显示异常的问题，进一步提高了量子点膜11的色域转换功能，从而使得该液晶显示器100也具有更高的色域显示。本发明的背光模组10可应用在多种液晶显示器中，能够实现多种液晶显示器的高色域设计。
在本说明书的描述中，参考术语“一个实施例”、“一些实施例”、“示例”、“具体示例”或“一些示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本发明的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施例或示例。而且，描述的具体特征、结构、材料或特点可以在任何的一个或多个实施例或示例中以合适的方式结合。
以上所揭露的仅为本发明一种较佳实施例而已，当然不能以此来限定本发明之权利范围，本领域普通技术人员可以理解实现上述实施例的全部或部分流程，并依本发明权利要求所作的等同变化，仍属于发明所涵盖的范围。

Claims (10)

1.一种背光模组，其用于液晶显示器，其特征在于，所述背光模组包括量子点膜、导光板及光源模块，所述光源模块发出的光经所述导光板进入所述量子点膜，所述量子点膜包括有效区和失效区，所述光源模块包括蓝光光源和绿光光源，所述蓝光光源与所述有效区的位置对应，所述绿色光源与所述失效区的位置对应。
2.如权利要求1所述的背光模组，其特征在于，所述绿光光源发出的绿光与所述蓝光光源发出的蓝光经由所述导光板进入所述量子点膜，并与所述量子点膜的失效区的红光相互混合而成白光。
3.如权利要求1所述的背光模组，其特征在于，所述失效区位于所述有效区的周围，所述蓝光光源位于所述绿光光源之间。
4.如权利要求1所述的背光模组，其特征在于，所述光源模块为LED灯条，所述蓝光光源为蓝光LED，所述绿色光源为绿光LED，所述蓝光LED位于所述LED灯条的中间位置，所述绿色LED位于所述LED灯条的两端。
5.如权利要求1至4任意一项所述的背光模组，其特征在于，所述量子点膜的上下两个表面还设置有保护层。
6.一种液晶显示器，其包括背光模组、依次设置于该背光模组上的薄膜晶体管基板及彩色滤光片，其特征在于，所述背光模组包括量子点膜、导光板及光源模块，所述光源模块发出的光经所述导光板进入所述量子点膜，所述量子点膜包括有效区和失效区，所述光源模块包括蓝光光源和绿光光源，所述蓝光光源与所述有效区的位置对应，所述绿色光源与所述失效区的位置对应。
7.如权利要求6所述的液晶显示器，其特征在于，所述绿光光源发出的绿光与所述蓝光光源发出的蓝光经由所述导光板进入所述量子点膜，并与所述量子点膜的失效区的红光相互混合而成白光。
8.如权利要求6所述的液晶显示器，其特征在于，所述失效区位于所述有效区的周围，所述蓝光光源位于所述绿光光源之间。
9.如权利要求6所述的液晶显示器，其特征在于，所述光源模块为LED灯条，所述蓝光光源为蓝光LED，所述绿色光源为绿光LED，所述蓝光LED位于所述LED灯条的中间位置，所述绿色LED位于所述LED灯条的两端。
10.如权利要求6至9任一项所述的液晶显示器，其特征在于，所述液晶显示器还包括反射层，所述反射层设置于所述导光板背对所述量子点膜的一侧。
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