CN108169943B - 液晶显示器 - Google Patents

液晶显示器 Download PDF

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CN108169943B
CN108169943B CN201810090389.1A CN201810090389A CN108169943B CN 108169943 B CN108169943 B CN 108169943B CN 201810090389 A CN201810090389 A CN 201810090389A CN 108169943 B CN108169943 B CN 108169943B
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liquid crystal
sub
light
pixels
emitting part
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CN108169943A (zh
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查国伟
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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 US16/069,287 priority patent/US11024239B2/en
Priority to PCT/CN2018/083906 priority patent/WO2019148665A1/zh
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Abstract

本发明公开了一种液晶显示器，其包括：液晶面板，包括多个光电探测器、与多个光电探测器对应的多个第一子像素以及多个第二子像素，每个光电探测器和与其对应的至少一个第一子像素的开口区部分重叠；背光模块，与所述液晶面板相对设置，所述背光模块包括第一发光部和第二发光部，所述第一发光部与所述多个第一子像素相对，所述第二发光部与所述多个第二子像素相对，所述第一发光部的发光亮度大于所述第二发光部的发光亮度。本发明通过提升背光模块的与液晶面板的多个第一子像素相对的第一发光部的发光亮度来弥补第一子像素的穿透率的损失，从而使液晶面板的显示亮度均匀。

Description

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，涉及一种液晶显示器。
背景技术
进入现代社会，人与显示器的交互成为人们获取与分享信息的重要途径，其中液晶显示器由于良好的画面再现性成为目前显示器的主流，这是因为液晶显示器在分辨率、帧率、色域、色偏、对比度、可视角、串扰、闪烁等规格方面已经逐渐满足了人眼对于显示画质的视觉需求。
移动终端显示技术近年来最新的突破方向则是更加注重新交互技术的集成与视觉美学性的提升，其中一个重要的方向便是高屏占比的全面屏显示技术，其关键的突破在于显示面板的上下左右边框(border)的压缩、摄像头及探测器异形切割、面内指纹识别等。目前较为常用的方式是采用正面指纹识别技术，传统的指纹识别技术采用与主页键(Home键)一体的方案，但是全面屏技术的要求使得面内指纹识别成为目前的当务之急。目前主流的指纹识别技术方案主要三种：电容指纹识别、超声波指纹识别、光学式指纹识别，其中光学式指纹识别由于能够穿透较厚的盖板玻璃成为目前最接近量产的方案。
光学式指纹识别应用于液晶显示技术中成为目前大家研究突破的重点方向，其中一个重要难点在于液晶显示器的面内识别区域需要设置光电探测器，这样不可避免的会影响到该面内识别区域的穿透率和灰阶亮度，从而导致液晶显示器整面显示不均匀的现象。
发明内容
为了解决上述现有技术存在的技术问题，本发明的目的在于提供一种使具有光学探测器的液晶面板显示均匀的液晶显示器。
根据本发明的一方面，提供了一种液晶显示器，其包括：液晶面板，包括多个光电探测器、与多个光电探测器对应的多个第一子像素以及多个第二子像素，每个光电探测器和与其对应的至少一个第一子像素的开口区部分重叠；背光模块，与所述液晶面板相对设置，所述背光模块包括第一发光部和第二发光部，所述第一发光部与所述多个第一子像素相对，所述第二发光部与所述多个第二子像素相对，所述第一发光部的发光亮度大于所述第二发光部的发光亮度。
进一步地，所述第一发光部的发光亮度与所述第二发光部的发光亮度的比值等于所述多个第二子像素的穿透率与所述多个第一子像素的穿透率的比值。
进一步地，所述第一发光部包括多个第一LED，所述第二发光部包括多个第二LED，所述第一LED的驱动电流大于所述第二LED的驱动电流。
进一步地，所述背光模块还包括：LED驱动器，用于分别向所述第一LED和所述第二LED提供驱动电流；电流功放电路，设置于所述LED驱动器和所述第一LED之间，所述电流功放电路用于将所述LED驱动器提供给所述第一LED的驱动电流进行放大。
进一步地，所述第一LED和所述第二LED通过设置于绑定区的绑定电极连接到所述LED驱动器。
进一步地，所述第一发光部的所述第一LED的排布方式与所述第二发光部的所述第二LED的排布方式相同。
进一步地，所述第一LED和所述第一子像素一一对应相对，所述第二LED和所述第二子像素一一对应相对。
进一步地，所述第一LED和所述第二LED均为Micro LED。
进一步地，所述多个光电探测器阵列排布。
进一步地，所述光电探测器包括指纹识别光电探测器。
本发明的有益效果：本发明通过提升背光模块的与液晶面板的多个第一子像素相对的第一发光部的发光亮度来弥补第一子像素的穿透率的损失，从而使液晶面板的显示亮度均匀。
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面板的结构示意图；
图2是根据本发明的另一实施例的光电探测器与第一子像素的对位示意图；
图3是根据本发明的实施例的背光模块的结构示意图。
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，为了清楚起见，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表示相同的元器件。
将理解的是，尽管在这里可使用术语“第一”、“第二”等来描述各种元件，但是这些元件不应受这些术语的限制。这些术语仅用于将一个元件与另一个元件区分开来。
图1是根据本发明的实施例的液晶面板的结构示意图。
参照图1，根据本发明的实施例的液晶面板100包括多个第一子像素110、多个第二子像素120和多个光电探测器130。
具体地，多个第一子像素110和多个第二子像素120阵列排布。在本实施例中，将多个第一子像素110所在区域定义为面内识别区域A1，而将多个第二子像素120所在区域定义为位于面内识别区域A1之外的非识别区域A2。
多个第一子像素110与多个光电探测器130对应。也就是说，多个光电探测器130位于面内识别区域A1。具体地，第一子像素110通常包括开口区111和器件区112；其中开口区111通常可以使背光模块提供的背光穿射过去，而器件区112由于设置薄膜晶体管等器件，因此器件区112无法使背光模块提供的背光穿射过去。需要说明的是，第二子像素120具有与第一子像素110相同的像素结构。
进一步地，在本实施例中，光电探测器130和第一子像素110一一对应，一个光电探测器130和其对应的一个第一子像素110的开口区111部分重叠。这样，这个光电探测器130会影响与其具有重叠部分的第一子像素110的开口区111的穿透率，从而使该第一子像素110的开口区111的穿透率下降。
如此，每个第一子像素110的开口区111和其对应的一个光电探测器130部分重叠，从而会导致面内识别区域A1的显示亮度低于非识别区域A2的显示亮度，进而造成液晶面板100的显示不均匀。
作为本发明的另一实施例，参照图2，每个光电探测器130还可以对应两个第一子像素110，这样，每个光电探测器130和其对应的两个第一子像素110的开口区111分别部分重叠。当然，应当理解的是，可以根据实际需求使每个光电探测器130对应三个或者更多个第一子像素110。
一般而言，液晶面板100通常由阵列基板(未示出)和彩膜基板(未示出)构成。在本发明的实施例中，光电探测器130可以设置于阵列基板上，或者光电探测器130还可以设置于彩膜基板上，只要是光电探测器130和其对应的第一子像素110的开口区111在空间上具有重叠部分即可，也就是说，光电探测器130在其对应的第一子像素110上的投影位于其对应的第一子像素110的开口区111以内即可。
众所周知，液晶面板100并不发光，因此其显示必需借用与其相对的背光模块提供的背光而进行显示。为了解决液晶面板100的显示不均匀，本实施例还提供了一种背光模块。
此外，在本实施例中，面内识别区域A1内的多个光电探测器130阵列排布，但本发明并不限制于此。进一步地，光电探测器130包括指纹识别光电探测器，但本发明并不限制于此。这样，面内识别区域A1被构造为指纹识别区域。
图3是根据本发明的实施例的背光模块的结构示意图。
参照图3，根据本发明的实施例的背光模块200可以与图1所示的液晶面板100相对设置，以向液晶面板100提供显示背光。背光模块200包括第一发光部210和第二发光部220。第一发光部210与面内识别区域A1相对设置，即第一发光部210与多个第一子像素110相对设置；第二发光部220与非识别区域A2相对设置，即第二发光部220与多个第二子像素120相对设置。
为了解决液晶面板100的面内识别区域A1与非识别区域A2的显示亮度不均匀的问题，可以使第一发光部210的发光亮度大于第二发光部220的发光亮度，这样可以补偿由于第一子像素110的开口区111被光电探测器130遮挡而使面内识别区域A1的显示亮度下降的部分，从而使面内识别区域A1的显示亮度与非识别区域A2的显示亮度一致，进而使液晶面板100显示均匀。
进一步地，可以事先量测确定多个第二子像素120的穿透率(或者平均穿透率)，即非识别区域A2的穿透率(或者平均穿透率)，并且事先量测确定多个第一子像素110的穿透率(或者平均穿透率)，即面内识别区域A1的穿透率(或者平均穿透率)，使第一发光部210的发光亮度与第二发光部220的发光亮度的比值等于多个第二子像素120的穿透率与多个第一子像素110的穿透率的比值，这样可以使面内识别区域A1的显示亮度与非识别区域A2的显示亮度一致，从而可以通过第一发光部210与第二发光部220的发光亮度的差异来弥补面内识别区域A1与非识别区域A2因不同的穿透率而出现的显示亮度差异。
此外，为了调节第一发光部210和第二发光部220的发光亮度，第一发光部210包括多个第一LED211，第二发光部220包括多个第二LED221。这里，第一LED211和第二LED221相同。第一发光部210中的多个第一LED211的排布方式与第二发光部220中的多个第二LED221的排列方式相同。
进一步地，第一发光部210中的多个第一LED211阵列排布，并且第二发光部220中的多个第二LED221阵列排布。也就是说，多个第一LED211和多个第二LED221阵列排布。
在本实施例中，第一LED211和第二LED221均是微型LED，即Micro LED，但本发明并不限制于此。这样，第一LED211可以与第一子像素110一一对应相对，即一个第一LED211对应相对一个第一子像素110；且第二LED221可以与第二子像素120一一对应相对，即一个第二LED221对应相对一个第二子像素120。
为了使第一发光部210的发光亮度大于第二发光部220的发光亮度，在本实施例中，使第一LED211的驱动电流大于第二LED221的驱动电流。
在本实施例中，背光模块200还包括：LED驱动器230，其中LED驱动器230向第一LED211和第二LED221提供驱动电流。进一步地，LED驱动器230通过设置于绑定区A3的绑定电极，即阳极B1和阴极B2连接到第一LED211和第二LED221。
通常而言，LED驱动器230通过绑定电极向第一LED211和LED221提供相同的驱动电流。但是在本实施例中，为了使第一LED211的驱动电流大于第二LED221的驱动电流，背光模块200还包括电流功放电路240，该电流功放电路240设置于阳极B1和第一LED211之间，该电流功放电路240用于将LED驱动器230提供给第一LED211的驱动电流进行放大。
综上所述，根据本发明的实施例，通过提升背光模块的与液晶面板的多个第一子像素相对的第一发光部的发光亮度来弥补第一子像素的穿透率的损失，从而使液晶面板的显示亮度均匀。
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 (9)

1.一种液晶显示器，其特征在于，包括：
液晶面板，包括多个光电探测器、与多个光电探测器对应的多个第一子像素以及多个第二子像素，每个光电探测器和与其对应的至少一个第一子像素的开口区部分重叠；
背光模块，与所述液晶面板相对设置，所述背光模块包括第一发光部和第二发光部，所述第一发光部与所述多个第一子像素相对，所述第二发光部与所述多个第二子像素相对，所述第一发光部的发光亮度大于所述第二发光部的发光亮度；
所述第一发光部的发光亮度与所述第二发光部的发光亮度的比值等于所述多个第二子像素的穿透率与所述多个第一子像素的穿透率的比值。
2.根据权利要求1所述的液晶显示器，其特征在于，所述第一发光部包括多个第一LED，所述第二发光部包括多个第二LED，所述第一LED的驱动电流大于所述第二LED的驱动电流。
3.根据权利要求2所述的液晶显示器，其特征在于，所述背光模块还包括：
LED驱动器，用于分别向所述第一LED和所述第二LED提供驱动电流；
电流功放电路，设置于所述LED驱动器和所述第一LED之间，所述电流功放电路用于将所述LED驱动器提供给所述第一LED的驱动电流进行放大。
4.根据权利要求3所述的液晶显示器，其特征在于，所述第一LED和所述第二LED通过设置于绑定区的绑定电极连接到所述LED驱动器。
5.根据权利要求2所述的液晶显示器，其特征在于，所述第一发光部的所述第一LED的排布方式与所述第二发光部的所述第二LED的排布方式相同。
6.根据权利要求2所述的液晶显示器，其特征在于，所述第一LED和所述第一子像素一一对应相对，所述第二LED和所述第二子像素一一对应相对。
7.根据权利要求6所述的液晶显示器，其特征在于，所述第一LED和所述第二LED均为Micro LED。
8.根据权利要求1所述的液晶显示器，其特征在于，所述多个光电探测器阵列排布。
9.根据权利要求1或8所述的液晶显示器，其特征在于，所述光电探测器包括指纹识别光电探测器。
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