WO2014101331A1 - 一种广视角液晶显示器及显示方法 - Google Patents

一种广视角液晶显示器及显示方法 Download PDF

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Publication number
WO2014101331A1
WO2014101331A1 PCT/CN2013/071249 CN2013071249W WO2014101331A1 WO 2014101331 A1 WO2014101331 A1 WO 2014101331A1 CN 2013071249 W CN2013071249 W CN 2013071249W WO 2014101331 A1 WO2014101331 A1 WO 2014101331A1
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Prior art keywords
pixel electrode
liquid crystal
sub
pixel
directions
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PCT/CN2013/071249
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English (en)
French (fr)
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李林
胡君文
洪胜宝
张泽鹏
何基强
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信利半导体有限公司
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Priority to US14/758,144 priority Critical patent/US20150338708A1/en
Publication of WO2014101331A1 publication Critical patent/WO2014101331A1/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
    • G02F1/1343—Electrodes
    • G02F1/134309—Electrodes characterised by their geometrical arrangement
    • G02F1/134363—Electrodes characterised by their geometrical arrangement for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]
    • 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
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G02F1/133707—Structures for producing distorted electric fields, e.g. bumps, protrusions, recesses, slits in pixel electrodes
    • 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
    • G02F1/1343—Electrodes
    • G02F1/13439—Electrodes characterised by their electrical, optical, physical properties; materials therefor; method of making
    • 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
    • G02F1/1343—Electrodes
    • G02F1/134309—Electrodes characterised by their geometrical arrangement
    • G02F1/134372—Electrodes characterised by their geometrical arrangement for fringe field switching [FFS] where the common electrode is not patterned

Definitions

  • the present invention relates to the field of liquid crystal display technology, and in particular to a wide viewing angle liquid crystal display and a display method.
  • IFTs Thin Film Transistors
  • the TFT means that each liquid crystal pixel on the wide viewing angle liquid crystal display is driven by a thin film transistor integrated therein, so that the screen information can be displayed with high brightness and high contrast.
  • the common electrode is hollowed out corresponding to each pixel electrode, and there is no ITO in the hollowed out portion, and the ITO groove is arranged at intervals.
  • the ITO grooves are arranged in parallel, so that The planar electric field formed by the common electrode and the pixel electrode has a single direction. Therefore, the driven liquid crystal molecules are in a single domain mode, that is, the liquid crystal molecular orientation design in a single pixel is singular. In this single-domain mode, when the liquid crystal molecules are aligned and viewed at different angles, the liquid crystal molecules refract differently in different directions of light, thereby causing color shift.
  • an embodiment of the present invention provides a wide viewing angle liquid crystal display and a display method for improving a color shift problem generated when a wide viewing angle liquid crystal display is displayed.
  • An embodiment of the present invention provides a wide viewing angle liquid crystal display, including a first substrate, a liquid crystal molecule, a common electrode, a pixel electrode, a protective layer, a second substrate, a Gate line, and a Source line, wherein, in each pixel electrode Two or more types of ITO grooves are provided on the corresponding common electrodes at intervals.
  • the pixel shape may be a diamond shape.
  • a second aspect of the embodiments of the present invention provides a wide viewing angle display method, including:
  • the ITO trenches of two or more directions are obtained by gap-spaced on the common electrode corresponding to each of the pixel electrodes.
  • the arrangement of the conventional single comb-like ITO groove is changed, so that the common electrode and the pixel electrode are formed.
  • the electric field in the direction drives the multi-domain display of the liquid crystal molecules, the orientation of the liquid crystal molecules is omnidirectional, and the transmittance of the liquid crystal molecules at different angles is improved, thereby effectively improving the color shift problem of the wide viewing angle liquid crystal display.
  • FIG. 1 is an ITO layout diagram of a common electrode on a corresponding pixel electrode in the prior art
  • FIG. 2 is a view showing an ITO arrangement of a common electrode on a corresponding pixel electrode according to an embodiment of the present invention
  • FIG. 3 is another ITO arrangement diagram of a common electrode on a corresponding pixel electrode according to an embodiment of the present invention
  • FIG. 5 is another ITO layout diagram of the common electrode on the corresponding pixel electrode in the embodiment of the present invention.
  • the embodiment of the invention provides a wide viewing angle liquid crystal display and a display method for improving the color shift problem generated when the wide viewing angle liquid crystal display is displayed, and can be applied to a mobile phone, a notebook display screen, a television display screen, a GPS display screen, etc. It can be understood by those skilled in the art that it can also be used on other devices that use a wide viewing angle liquid crystal display, which is not limited herein.
  • Embodiments of the present invention provide a wide viewing angle liquid crystal display including a first substrate, a liquid crystal molecule, a common electrode, a pixel electrode, a protective layer, a second substrate, a Gate line, and a Source line, wherein, corresponding to each pixel electrode Two or more ITO grooves are provided on the common electrode at intervals.
  • each of the pixel electrodes includes a red sub-pixel electrode, a green sub-pixel electrode, and a blue sub-pixel electrode; for black and white display, each pixel electrode includes a monochromatic sub-pixel electrode.
  • At least two or more kinds of ITO trenches are provided at intervals on the common electrode corresponding to each sub-pixel, and the pixel electrode may be changed into a diamond shape.
  • the Gate line and the Source line are arranged in a Z-shape or an N-shape in the pixel interval.
  • 1 represents an ITO trench
  • the ITO trench is formed by hollowing out the ITO on the common electrode of the pixel electrode in the pixel display region, and the ITO trench has at least two different directions. 2 denotes a sub-pixel electrode.
  • the patterns in the adjacent three small diamonds may be a red sub-pixel electrode, a green sub-pixel electrode and a blue sub-pixel electrode, respectively; It is shown that the graphics in any of the small diamonds are monochromatic sub-pixel electrodes.
  • R in FIG. 2 represents a red sub-pixel electrode
  • G represents a green sub-pixel electrode
  • B represents a blue sub-pixel electrode.
  • the shape of the pixel is changed to a diamond shape, and the design method in which the pixel shape is conventionally rectangular is changed, and the practical area in which the liquid crystal molecules are inverted can be ensured to obtain a higher transmittance of the liquid crystal display.
  • the liquid crystal molecules after power-on, can form a multi-domain display, improve the color shift problem caused by the display of the wide viewing angle liquid crystal display, further improve the aperture ratio, and effectively improve the display effect of the wide viewing angle liquid crystal display.
  • the embodiment of the invention further provides a wide viewing angle display method, which comprises: at least two or more kinds of ITO slots are obtained by gaping on a common electrode corresponding to each pixel electrode to obtain two or two types.
  • the planar electric field in the above direction can also realize multi-domain display of liquid crystal molecules by changing the shape of the pixel.
  • each of the pixel electrodes includes a red sub-pixel electrode, a green sub-pixel electrode, and a blue sub-pixel electrode; for black and white display, each pixel electrode includes a monochrome sub-pixel electrode, and then the ITO trenches in at least two directions are obtained by gap-spaced on the common electrode corresponding to each of the pixel electrodes, and specifically, at least two directions of ITO trenches are provided at intervals on the common electrode corresponding to each of the sub-pixels. .
  • the conventional single comb-like common electrode arrangement is changed, and the shape of the pixel is changed to ensure the liquid crystal molecules.
  • the actual flip area ensures a high aperture ratio, compensates from different viewing angles, reduces the fluctuation of liquid crystal molecules to light refraction at an oblique angle, and thus effectively improves the color shift problem.
  • the ITO arrangement on the common electrode corresponding to the pixel electrode in the embodiment of the present invention is shown in FIG. 2 to FIG. 5, but is not limited to the four arrangement modes, and other implementations of the present invention can be achieved.
  • the arrangement of the examples is in the technical scope of the present invention and is not limited herein.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Geometry (AREA)
  • Liquid Crystal (AREA)

Abstract

本发明实施例公开了一种广视角液晶显示器及显示方法，用于改善广视角液晶显示器显示时产生的色偏问题，可以通过在对应像素电极的公共电极上掏空设置两种或两种以上方向的ITO掏槽，使得液晶分子能够多畴显示，从不同视角进行补偿，减小倾斜角度下液晶分子对光折射的波动，从而改善广视角液晶显示器的显示效果。

Description

一种广视角液晶显示器及显示方法
本申请要求于 2012 年 12 月 31 日提交中国专利局、 申请号为 201210594508.X, 发明名称为 "一种广视角液晶显示器及显示方法" 的中国专 利申请的优先权， 其全部内容通过引用结合在本申请中。
技术领域
本发明涉及液晶显示技术领域，具体涉及一种广视角液晶显示器及显示方 法。
背景技术
薄膜场效应晶体管（ Thin Film Transistor, 筒称 IFT )在现在生活中有着越 来越多的使用， 如手机显示屏、 GPS显示屏、 电脑显示屏、 MP3显示屏等。
TFT是指广视角液晶显示器上的每一个液晶像素点都是由集成在其后的薄膜 晶体管来驱动， 从而可以高速亮度高对比度显示屏幕信息。
在现有 TFT广视角液晶显示器中， 公共电极对应每个像素电极进行掏空 处理， 被掏空处没有 ITO, 形成间隔排列的 ITO掏槽， 如图 1所示， ITO掏槽 平行排列， 使得公共电极和像素电极所形成的平面电场方向单一。 因此， 被驱 动的液晶分子为单畴模式， 即单个像素内液晶分子取向设计具有单一性。 而在 这种单畴模式下， 当液晶分子排列定向后， 在不同角度观看时， 由于液晶分子 对不同方向光线的折射不同， 从而产生色偏。
发明内容
针对上述缺陷， 本发明实施例提供了一种广视角液晶显示器及显示方法， 用于改善广视角液晶显示器显示时产生的色偏问题。
本发明实施例一方面提供了一种广视角液晶显示器， 包括第一基板、液晶 分子、 公共电极、 像素电极、 保护层、 第二基板、 Gate线、 Source线， 其中， 在与每个像素电极对应的公共电极上间隔掏空设置两种或两种以上方向的 ITO掏槽。
优选地， 所述像素形状可为菱形。
本发明实施例第二方面提供了一种广视角显示方法， 包括：
在与每个像素电极对应的公共电极上间隔掏空得到两种或两种以上方向 的 ITO掏槽。 从以上技术方案可以看出， 本发明实施例具有以下优点：
本发明实施例通过在对应像素电极的公共电极上间隔掏空设置两种或两 种以上方向的 ITO掏槽， 改变传统上单一的梳子状 ITO掏槽排列方式， 使得 公共电极和像素电极形成多种方向的电场， 进而驱动液晶分子多畴显示， 液晶 分子取向具有多向性，提高液晶分子在不同角度的透光率，从而有效改善广视 角液晶显示器的色偏问题。
附图说明
为了更清楚地说明本发明实施例的技术方案，下面将对本发明实施例中所 需要使用的附图作筒单地介绍，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为现有技术中对应像素电极上的公共电极的 ITO排布图；
图 2为本发明实施例中对应像素电极上的公共电极的 ITO排布图； 图 3为本发明实施例中对应像素电极上的公共电极的另一 ITO排布图； 图 4为本发明实施例中对应像素电极上的公共电极的另一 ITO排布图； 图 5为本发明实施例中对应像素电极上的公共电极的另一 ITO排布图。
具体实施方式
下面将结合本发明实施例的附图， 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作出创造 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。
本发明实施例提供了一种广视角液晶显示器及显示方法，用于改善广视角 液晶显示器显示时产生的色偏问题， 可以应用于手机、 笔记本显示屏、 电视显 示屏、 GPS显示屏等， 本领域的技术人员可以理解， 还可以使用在其它使用广 视角液晶显示器的设备上， 在此不作限定。
本发明实施例提供了一种广视角液晶显示器， 包括第一基板、 液晶分子、 公共电极、 像素电极、 保护层、 第二基板、 Gate 线、 Source 线， 其中， 在与 每个像素电极对应的公共电极上间隔掏空设置两种或两种以上方向的 ITO掏 槽。 具体地， 对于彩色显示， 每个所述像素电极包括红色子像素电极、 绿色子 像素电极和蓝色子像素电极； 对于黑白显示，每个像素电极包括单色子像素电 极。在与每个子像素对应的公共电极上间隔掏空设置至少两种或两种以上方向 的 ITO掏槽， 还可以加以将像素电极改成菱形。 而所述 Gate线、 Source线在 像素区间对应呈 Z形或 N形排布。 请参阅图 2~图 5, 其中， 1表示 ITO掏槽， ITO掏槽是在像素显示区， 对应像素电极的公共电极上将 ITO掏空而成， ITO 掏槽至少具有两种不同方向。 2表示子像素电极， 在每一层像素显示区上， 对 于为彩色显示，相邻三个小菱形中的图形可以分别是红色子像素电极、绿色子 像素电极和蓝色子像素电极； 对于黑白显示，任意一个小菱形中的图形均是单 色子像素电极。 假设图 2对应为彩色显示， 那么图 2中 R表示为红色子像素 电极， G表示为绿色子像素电极， B表示为蓝色子像素电极。 通过两种或两种 以上的不同方向的 ITO掏槽设计， 能够得到两种或两种以上方向的平面电场， 可以实现液晶分子的多畴显示效果。在图 2和图 3所示中，像素形状加以改变 为菱形， 改变传统上像素形状为矩形的设计方式， 能够保证液晶分子翻转的实 用面积以获取液晶显示器更高的透光率。 在本发明实施例中， 加电后， 液晶分 子能够形成多畴显示， 改善广视角液晶显示器显示产生的色偏问题，且进一步 提高了开口率， 有效提高广视角液晶显示器的显示效果。
本发明实施例还提供了一种广视角显示方法，包括在与每个像素电极对应 的公共电极上间隔掏空得到至少两种或两种以上方向的 ITO掏槽， 以得到两 种或两种以上方向的平面电场，还可以通过加以改变像素形状， 实现液晶分子 的多畴显示。 可以理解地是， 对于彩色显示， 每个所述像素电极包括红色子像 素电极、 绿色子像素电极和蓝色子像素电极； 对于黑白显示， 每个像素电极包 括单色子像素电极，进而所述在与每个像素电极对应的公共电极上间隔掏空得 到至少两种方向的 ITO掏槽， 具体还可以是在与每个子像素对应的公共电极 上间隔掏空设置至少两种方向的 ITO掏槽。
本发明实施例通过在对应像素电极的公共电极上间隔掏空设置至少两种 方向的 ITO掏槽， 改变传统上单一的梳子状公共电极排布， 并且通过加以改 变像素的形状， 保证液晶分子的实际翻转面积， 保证高开口率， 从不同视角进 行补偿， 减小倾斜角度下液晶分子对光折射的波动， 进而有效改善色偏问题。 本领域技术人员可以理解， 图 2~图 5所示仅为本发明实施例中对应像素 电极的公共电极上的 ITO排布方式， 但不仅限于这 4种排布方式， 其它能达 到本发明实施例目的排布方式均属于本发明的技术范畴， 在此不作限定。
以上对本发明所提供的一种广视角液晶显示器及显示方法进行了详细介 绍， 对于本领域的一般技术人员， 依据本发明实施例的思想， 在具体实施方式 及应用范围上均会有改变之处， 综上所述， 本说明书内容不应理解为对本发明 的限制。

Claims

权 利 要 求
1、 一种广视角液晶显示器， 包括第一基板、 液晶分子、 公共电极、 像素 电极、 保护层、 第二基板、 Gate线、 Source 线， 其中， 其特征在于， 在与每 个像素电极对应的公共电极上间隔掏空设置两种或两种以上方向的 ITO掏槽。
2、 根据权利要求 1所述的广视角液晶显示器， 其特征在于， 对于彩色显 示，每个所述像素电极包括红色子像素电极、绿色子像素电极和蓝色子像素电 极； 对于黑白显示， 每个像素电极包括单色子像素电极， 具体地， 在与每个子 像素对应的公共电极上间隔掏空设置至少两种或两种以上方向的 ιτθ掏槽。
3、 根据权利要求 1或 2所述的广视角液晶显示器， 其特征在于， 所述像 素形状可为菱形，所述 Gate线、 Source线在像素区间对应呈 Z形或 N形排布。
4、 一种广视角显示方法， 其特征在于， 包括：
在与每个像素电极对应的公共电极上间隔掏空得到两种或两种以上方向 的 ITO掏槽， 以得到两种或两种以上方向的平面电场。
5、 根据权利要求 4所述的方法， 其特征在于， 每个所述像素电极包括红 色子像素电极、绿色子像素电极和蓝色子像素电极， 或者每个像素电极包括黑 色子像素电极和白色子像素电极，进而所述在与每个像素电极对应的公共电极 上间隔掏空得到两种或两种以上方向的 ITO掏槽， 以得到两种或两种以上方 向的平面电场， 具体包括：
在与每个子像素对应的公共电极上间隔掏空设置两种或两种以上方向的 ITO掏槽， 以得到两种或两种以上方向的平面电场。
6、 根据权利 4或 5所述的方法， 其特征在于， 所述像素形状可为菱形。
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