CN102375276A - 液晶显示面板 - Google Patents

液晶显示面板 Download PDF

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CN102375276A
CN102375276A CN2011102283228A CN201110228322A CN102375276A CN 102375276 A CN102375276 A CN 102375276A CN 2011102283228 A CN2011102283228 A CN 2011102283228A CN 201110228322 A CN201110228322 A CN 201110228322A CN 102375276 A CN102375276 A CN 102375276A
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electrode
pixel
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pixel area
display panels
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CN102375276B (zh
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安亨哲
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TCL China Star Optoelectronics Technology Co Ltd
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Samsung Mobile Display Co Ltd
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    • G—PHYSICS
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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
    • 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
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
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    • G02F1/134363—Electrodes characterised by their geometrical arrangement for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
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    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
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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
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Abstract

一种液晶显示面板，具有提高的侧面可视性。所述液晶显示面板包括：包括形成在像素区上的像素电极的第一基板，所述像素区包括第一子像素区和第二子像素区；以及联接到所述第一基板的第二基板，其中在所述第一基板与所述第二基板之间容纳有液晶层，所述第二基板包括在与所述像素区对应的区域上形成的公共电极，其中所述像素电极包括：形成在所述第一子像素区上的第一子像素电极；形成在所述第二子像素区上的第二子像素电极；以及形成在所述第一子像素区与所述第二子像素区之间的接触电极，并且其中所述第一子像素电极与所述接触电极彼此分隔开预定的距离。

Description

液晶显示面板
相关专利申请的交叉引用
本申请要求2010年8月10日在韩国知识产权局递交的韩国专利申请No.10-2010-0076966的权益，该申请的公开内容通过引用整体合并于此。
技术领域
本发明的一个或多个方面涉及液晶显示面板，更具体地说，涉及具有提高的侧面可视性的液晶显示面板。
背景技术
一般而言，液晶显示面板包括阵列基板、面对阵列基板的滤色器基板以及形成在阵列基板与滤色器基板之间的液晶层。阵列基板包括作为实现图像的基本单元的多个像素。每个像素包括栅极布线、数据布线、薄膜晶体管(TFT)和像素电极。栅极布线和数据布线分别接收栅极信号和数据信号，并且分别电联接到TFT的栅电极和源电极。像素电极电联接到TFT的漏电极，并且面对形成在滤色器基板上的公共电极，其中液晶层***公共电极与像素电极之间。
与阴极射线管(CRT)显示设备相比，包括液晶显示面板的液晶显示设备可以更薄，但可能具有较窄的视角。
为了克服视角较窄的问题，近来已对具有宽视角的液晶显示设备，例如垂直取向构型(PVA)模式的液晶显示设备、多象限垂直取向构型(M-PVA)模式的液晶显示设备和超级垂直取向构型(S-PVA)模式的液晶显示设备，进行了积极的研究。这些液晶显示设备通过形成液晶分子以不同的方向与图案化的透明电极一起布置在其中的液晶象限来进行制造，因此可以具有较宽的视角。
发明内容
本发明的一个或多个方面提供了具有提高的侧面可视性的液晶显示面板。
根据本发明的一方面，液晶显示面板包括：包括位于像素区上的像素电极的第一基板，所述像素区包括第一子像素区和第二子像素区；以及联接到所述第一基板的第二基板，其中在所述第一基板与所述第二基板之间容纳有液晶层，所述第二基板包括在与所述像素区对应的区域上形成的公共电极，其中所述像素电极包括：位于所述第一子像素区上的第一子像素电极；位于所述第二子像素区上的第二子像素电极；以及位于所述第一子像素区与所述第二子像素区之间的接触电极，并且其中所述第一子像素电极与所述接触电极彼此分隔开预定的距离。
所述第一基板可以进一步包括：栅电极；通过栅绝缘层与所述栅电极绝缘的半导体层；以及电联接到所述半导体层的源电极和漏电极，并且其中所述漏电极延伸到所述第一子像素区。
所述液晶显示面板可以进一步包括位于所述像素电极与所述漏电极之间的钝化层。
可以由所述第一子像素电极、所述钝化层以及延伸到所述第一子像素区的所述漏电极形成联接电容器。
所述液晶显示面板可以进一步包括被形成为与所述像素电极重叠的存储布线。
可以由所述存储布线、所述栅绝缘层层和所述漏电极形成存储电容器。
所述第一子像素电极可以是浮置电极。
可以在所述公共电极的至少一部分中形成第一开口，以便与所述第一子像素电极对应。
所述第一基板可以进一步包括：延伸到所述第一子像素区的漏电极；以及位于所述像素电极与所述漏电极之间的钝化层，其中由所述第一子像素电极的形成所述第一开口的区域、所述钝化层和所述漏电极形成联接电容器。
所述液晶显示面板可以进一步包括用于将所述第二子像素电极与所述接触电极彼此联接的连接电极。
根据本发明的另一方面，液晶显示面板包括：开关器件，形成在第一基板上，并且包括源电极、漏电极和栅电极；第一子像素区，电联接到所述开关器件，并且包括第一液晶电容器和联接电容器；以及第二子像素区，电联接到所述开关器件，并且包括第二液晶电容器，其中充入所述第一子像素区的电压小于充入所述第二子像素区的电压。
所述联接电容器可以串联联接在所述漏电极与所述第一液晶电容器之间。
所述液晶显示面板可以进一步包括位于所述第一子像素区与所述第二子像素区之间的存储电容器。
所述液晶显示面板可以进一步包括：数据布线，电联接到所述源电极；栅极布线，电联接到所述栅电极；以及存储布线，电联接到所述存储电容器的一个端子，并且基本上平行于所述栅极布线延伸的方向而延伸。
所述液晶显示面板可以进一步包括面对所述第一基板的第二基板，其中在所述第二基板上形成有公共电极。
可以在所述公共电极的形成所述联接电容器的区域中形成第一开口。
所述液晶显示面板可以进一步包括：形成在所述第一子像素区上的第一子像素电极；形成在所述第二子像素区上的第二子像素电极；以及形成在所述第一子像素区与所述第二子像素区之间的接触电极，其中所述第一子像素电极与所述接触电极彼此分隔开预定的距离。
所述液晶显示面板可以进一步包括位于所述第一子像素电极与所述漏电极之间的钝化层，其中所述漏电极延伸到所述第一子像素区，并且其中由所述第一子像素电极、所述钝化层以及在所述第一子像素区中延伸的所述漏电极形成所述联接电容器。
附图说明
通过参照附图详细描述本发明的示例性实施例，本发明的上述及其它特征和优点将变得更加明显，附图中：
图1是根据本发明实施例的液晶显示面板的平面图；
图2是沿图1的线A-A′截取的液晶显示面板的截面图；以及
图3是根据本发明实施例的液晶显示面板的单个像素的等效电路图。
具体实施方式
现在将参照附图更充分地描述本发明，附图中示出本发明的示例性实施例。
图1是根据本发明实施例的液晶显示面板的平面图。图2是沿图1的线A-A′截取的液晶显示面板的截面图。
参见图1和图2，根据本实施例的液晶显示面板包括第一基板100和联接到第一基板100的第二基板200，其中液晶层300容纳在第一基板100与第二基板200之间。
第一基板100包括第一底基板110，第一底基板110包括被限定为第一底基板110的一部分的像素区PA。在这种情况下，像素区PA包括彼此分离的第一子像素区PAS1和第二子像素区PAS2。
栅极布线GL以及与栅极布线GL相交的数据布线DL形成在第一底基板110上。
连接到每条栅极布线GL和每条数据布线DL的开关器件TR以及连接到开关器件TR的像素电极PE形成在像素区PA上。另外，存储布线STL形成在像素区PA上以便与像素电极PE部分重叠。
开关器件TR包括栅电极GE、栅绝缘层120(图2)、半导体层130、源电极SE和漏电极DE。栅电极GE从栅极布线GL突出。栅绝缘层120形成在栅极布线GL和栅电极GE上，如图2所示。半导体层130包括掺有杂质的有源层以及形成在有源层上的欧姆接触层。在这种情况下，半导体层130形成在栅绝缘层120上，以便与栅电极GE对应。源电极SE从数据布线DL突出，并且形成在半导体层130上。漏电极DE与源电极SE分隔开，并且形成在半导体层130上。
接触部分CT形成在漏电极DE的延伸部分中，并且漏电极DE和以下将描述的像素电极PE的接触电极CE通过接触部分CT彼此电连接。如图2所示，接触部分CT包括形成在钝化层140中的接触孔，钝化层140形成在数据布线DL、源电极SE和漏电极DE上。在这种情况下，源电极SE和漏电极DE可以各自包括诸如金属材料、氧化铟锡(ITO)或氧化铟锌(IZO)之类的导电材料。
像素电极PE包括第一子像素电极PES1、第二子像素电极PES2、接触电极CE和连接电极BE。第一子像素电极PES1形成在第一子像素区PAS1上，并且第二子像素电极PES2形成在在第二子像素区PAS2上。在这种情况下，第一子像素电极PES1可以是与第二子像素电极PES2、接触电极CE和连接电极BE分隔开预定距离的浮置型电极。
接触电极CE形成在第一子像素电极PES1与第二子像素电极PES2之间，并且连接电极BE形成在第二子像素电极PES2与接触电极CE之间。另外，开关器件TR形成为与接触电极CE相邻以通过接触部分CT电联接到接触电极CE。
存储布线STL形成在第一子像素区PAS1与第二子像素区PAS2之间的区域上，即形成在与开关器件TR相邻的区域上。存储布线STL形成为与接触电极CE重叠，如图1所示。
如图2所示，第二基板200包括第二底基板210，第二底基板210包括被限定为第二底基板210的一部分并且包括第一子像素区PAS1和第二子像素区PAS2的像素区PA。遮光层(未示出)、滤色器层230、第一上涂覆层(未示出)以及公共电极250形成在第二底基板210上。
遮光层由导电材料形成，并且与栅极布线GL和数据布线DL对应以便遮挡光。可替代地，遮光层可以形成为与栅极布线GL、数据布线DL、开关器件TR和存储布线STL对应。遮光层具有包括铬(Cr)层和氧化铬(CrOx)层的双层结构。
滤色器层230形成在像素区PA上，并且例如，形成在像素区PA的由遮光层限定的部分上。
公共电极250形成在滤色器层230上。也就是说，公共电极250共同形成在像素区PA上形成的像素电极PE(即第一子像素电极PES1和第二子像素电极PES2)、接触电极CE和连接电极BE上，并且公共电压Vcom被施加给公共电极250。公共电极250共同连接到形成在与像素区PA相邻的其它像素区上的其它公共电极。
公共电极250的第一子像素区PAS1和第二子像素区PAS2被部分地去除以形成预定的开口。也就是说，与第一子像素区PAS1对应的第一开口OAS1以及与第二子像素区PAS2对应的第二开口OAS2形成在公共电极250中，如图2所示。例如，第一开口OAS1可以形成为与第一像素区PAS1的中央部分对应，并且第二开口OAS2可以形成为与第二子像素区PAS2的中央部分对应。
在这种情况下，第一液晶电容器ClC1(参见图3)由第一子像素电极PES1、液晶层300和公共电极250限定，并且第二液晶电容器ClC2(参见图3)由第二子像素电极PES2、液晶层300和公共电极250限定。存储电容器Cst由存储布线STL、栅绝缘层120和漏电极DE限定。另外，联接电容器Ccp由第一子像素电极PES1、钝化层140和漏电极DE限定。在这种情况下，漏电极DE中用于形成存储电容器Cst和联接电容器Ccp的区域可以具有位于D1-D2平面上的预定区域。同样地，通过在公共电极250中作为死区(deadspace)的第一开口OAS1中形成联接电容器Ccp，根据本实施例的液晶显示面板可以具有提高的孔径比和侧面可视性，这将在下文中进行描述。
如在相关技术的描述中所描述的那样，已对具有极好顶视角、底视角、左视角和右视角的多象限垂直取向构型(M-PVA)模式的液晶显示面板进行了积极研究。然而，在这种M-PVA模式的液晶显示面板中，由于过度的伽马变化，在液晶显示面板的侧面部分周围会出现灰度失真，导致色偏问题，从而降低侧面可视性。为了防止色偏问题，已对将单个像素分成两个或多个子像素并且将不同灰度电压施加给各子像素以在单个像素中混合双灰度级的方法进行了研究。然而，在使用这些方法时，孔径比可能会减小，并且制造成本可能会增加。
从这个观点出发，在根据本实施例的液晶显示面板中，电容器形成在像素电极的开口中，从而在不减小孔径比的情况下提高了侧面可视性。
也就是说，如图1和图2所示，液晶显示面板被配置为使得两个子像素区PAS1和PAS2可以布置在单个像素区PA内。另外，用于形成象限的第一开口OAS1和第二开口OAS2分别形成在第一子像素区PAS1和第二子像素区PAS2中。在这种情况下，在根据本实施例的液晶显示面板中，像素电极PE包括第一子像素电极PES1、第二子像素电极PES2、接触电极CE和连接电极BE，并且第一子像素电极PES1和接触电极CE彼此分离。因此，用于允许给各子像素施加不同电压的联接电容器Ccp可以形成在与第一子像素区PAS1的第一开口OAS1对应的区域中。
也就是说，用于形成存储电容器Cst的漏电极DE延伸到第一子像素区PAS1的第一开口OAS1以用作数据桥。在联接电容器Ccp由漏电极DE和第一子像素电极PES1形成时，钝化层140***漏电极DE和第一子像素电极PES1之间。减少的量与施加给联接电容器Ccp的电压一样多的液晶电压，经由第一子像素电极PES1被施加给第一子像素区PAS1。另一方面，与一般结构类似，由氧化铟锡(ITO)形成的连接电极BE在第二子像素区PAS2中用作数据桥，并且存储电容器Cst和第二子像素电极PES2彼此连接。在这种情况下，不考虑第一子像素区PAS1和第二子像素区PAS2，公共电极250形成在像素区PA的整个表面上，但是像素电极PE被分开以便与第一子像素区PAS1和第二子像素区PAS2对应。
在这种情况下，联接电容器Ccp的电容可以由钝化层140的厚度和用作数据桥的漏电极DE的面积控制。
通过在作为死区的第一开口OAS1中形成串联到像素电压的联接电容器Ccp，在根据本实施例的液晶显示面板中，可以最小化孔径比的损失，并且补偿侧面可视性。
图3是根据本发明实施例的液晶显示面板的单个像素的等效电路图。
参见图3，液晶显示面板的单个像素包括数据布线DL、栅极布线GL、存储布线STL、开关器件TR、第一子像素区PAS1、联接电容器Ccp以及第二子像素区PAS2。
开关器件TR的栅电极电连接到栅极布线GL，开关器件TR的源电极电连接到数据布线DL，并且开关器件TR的漏电极电连接到第一子像素区PAS1。
第一子像素区PAS1包括第一液晶电容器ClC1和联接电容器Ccp。联接电容器Ccp布置在开关器件TR的漏电极与第一液晶电容器ClC1之间。第一液晶电容器ClC1的一个端子电联接到联接电容器Ccp，并且另一端子电联接到施加公共电压Vcom的公共电极250(参见图2)。
第二子像素区PAS2包括第二液晶电容器ClC2和存储电容器Cst。第二液晶电容器ClC2的一个端子电联接到开关器件TR的漏电极，并且另一端子电联接到施加公共电压Vcom的公共电极250(参见图2)。存储电容器Cst并联联接到第二液晶电容器ClC2。存储电容器Cst的一个端子电连接到第二液晶电容器ClC2的端子，并且另一端子电联接到存储布线STL。
在向栅极布线GL施加栅极电压时，开关器件TR接通，并且施加给数据布线DL的数据电压被施加给漏电极。施加给开关器件TR的漏电极的数据电压充入第一子像素区PAS1和第二子像素区域PAS2。在这种情况下，通过联接电容器Ccp充入第一子像素区PAS1的电压小于充入第二子像素区PAS2的电压。也就是说，减小的量与施加给联接电容器Ccp的电压一样多的液晶电压被施加给第一子像素区PAS1。
由于施加给第一子像素区PAS1和第二子像素区PAS2的电压之差，形成在第一子像素区PAS1与公共电极250(参见图2)之间的液晶分子平放的程度小于形成在第二子像素区PAS2与公共电极250(参见图2)之间的液晶分子平放的程度。因此，透过第一子像素区PAS1的光量和透过第二子像素区PAS2的光量被组合，从而提高了侧面视角，同时维持液晶显示面板的前部的亮度。
在像素区的孔径比不损失的情况下，根据本发明实施例的液晶显示面板的侧面可视性可以得到提高。
尽管已参照本发明的示例性实施例具体示出并描述了本发明，但本领域普通技术人员应当理解，在不背离由所附权利要求所限定的本发明的精神和范围的情况下，可以在这里对形式和细节做出各种改变。

Claims (18)

1.一种液晶显示面板，包括：
包括位于像素区上的像素电极的第一基板，所述像素区包括第一子像素区和第二子像素区；以及
联接到所述第一基板的第二基板，其中在所述第一基板与所述第二基板之间容纳有液晶层，所述第二基板包括在与所述像素区对应的区域上形成的公共电极，
其中所述像素电极包括：
位于所述第一子像素区上的第一子像素电极；
位于所述第二子像素区上的第二子像素电极；以及
位于所述第一子像素区与所述第二子像素区之间的接触电极，并且
其中所述第一子像素电极与所述接触电极彼此分隔开预定的距离。
2.根据权利要求1所述的液晶显示面板，其中所述第一基板进一步包括：栅电极；
通过栅绝缘层与所述栅电极绝缘的半导体层；以及
电联接到所述半导体层的源电极和漏电极，并且
其中所述漏电极延伸到所述第一子像素区。
3.根据权利要求2所述的液晶显示面板，进一步包括位于所述像素电极与所述漏电极之间的钝化层。
4.根据权利要求3所述的液晶显示面板，进一步包括由所述第一子像素电极、所述钝化层以及延伸到所述第一子像素区的所述漏电极形成的联接电容器。
5.根据权利要求3所述的液晶显示面板，进一步包括与所述像素电极重叠的存储布线。
6.根据权利要求5所述的液晶显示面板，进一步包括由所述存储布线、所述栅绝缘层和所述漏电极形成的存储电容器。
7.根据权利要求1所述的液晶显示面板，其中所述第一子像素电极是浮置电极。
8.根据权利要求1所述的液晶显示面板，其中在所述公共电极的至少一部分中形成有第一开口，以与所述第一子像素电极对应。
9.根据权利要求8所述的液晶显示面板，其中所述第一基板进一步包括：
延伸到所述第一子像素区的漏电极；以及
***在所述像素电极与所述漏电极之间的钝化层，
其中由所述第一子像素电极的形成所述第一开口的区域、所述钝化层和所述漏电极形成联接电容器。
10.根据权利要求1所述的液晶显示面板，进一步包括用于将所述第二子像素电极与所述接触电极彼此电联接的连接电极。
11.一种液晶显示面板，包括：
开关器件，形成在第一基板上，并且包括源电极、漏电极和栅电极；
第一子像素区，电联接到所述开关器件，并且包括第一液晶电容器和联接电容器；以及
第二子像素区，电联接到所述开关器件，并且包括第二液晶电容器，
其中充入所述第一子像素区的电压小于充入所述第二子像素区的电压。
12.根据权利要求11所述的液晶显示面板，其中所述联接电容器串联联接在所述漏电极与所述第一液晶电容器之间。
13.根据权利要求11所述的液晶显示面板，进一步包括位于所述第一子像素区与所述第二子像素区之间的存储电容器。
14.根据权利要求13所述的液晶显示面板，进一步包括：
数据布线，电联接到所述源电极；
栅极布线，电联接到所述栅电极；以及
存储布线，电联接到所述存储电容器的一个端子，并且平行于所述栅极布线延伸的方向而延伸。
15.根据权利要求11所述的液晶显示面板，进一步包括：面对所述第一基板的第二基板；以及位于所述第二基板上的公共电极。
16.根据权利要求15所述的液晶显示面板，其中在所述公共电极的形成所述联接电容器的区域中形成第一开口。
17.根据权利要求11所述的液晶显示面板，进一步包括：
位于所述第一子像素区上的第一子像素电极；
位于所述第二子像素区上的第二子像素电极；以及
位于所述第一子像素区与所述第二子像素区之间的接触电极，
其中所述第一子像素电极与所述接触电极彼此分隔开预定的距离。
18.根据权利要求17所述的液晶显示面板，进一步包括位于所述第一子像素电极与所述漏电极之间的钝化层，
其中所述漏电极延伸到所述第一子像素区，并且
其中由所述第一子像素电极、所述钝化层以及在所述第一子像素区中延伸的所述漏电极形成所述联接电容器。
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KR20120014785A (ko) 2012-02-20

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