CN106950769B - 阵列基板、显示装置 - Google Patents

阵列基板、显示装置 Download PDF

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CN106950769B
CN106950769B CN201710166671.9A CN201710166671A CN106950769B CN 106950769 B CN106950769 B CN 106950769B CN 201710166671 A CN201710166671 A CN 201710166671A CN 106950769 B CN106950769 B CN 106950769B
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array substrate
contact hole
alignment film
contact holes
display device
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CN106950769A (zh
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柴立
王茂林
雷兴
董成才
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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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Abstract

本发明涉及液晶显示技术领域，具体涉及一种COA技术的阵列基板及显示装置。本发明的阵列基板，自下而上依次设置有基底层、金属层和色阻层，该阵列基板上还设置有穿过色阻层并与金属层接触的接触孔，接触孔设置为当配向膜液滴滴落在接触孔的正上方时，配向膜液滴能够分散开。这样就不会出现如现有技术中的空气泡，避免了由于配向膜堆积产生的液晶盒间隙变大。从而，在不改造升级现有配向膜设备的情况下，避免了由此产生的显示亮度差异，提升了产品品质。本发明的显示装置由于采用了该阵列基板，提高了该显示装置的亮度均一性。

Description

阵列基板、显示装置
技术领域
本发明涉及液晶显示技术领域，具体涉及一种COA技术的阵列基板及显示装置。
背景技术
薄膜晶体管液晶显示器(TFT-LCD)由于具有体积小、功耗低、无辐射等特点而备受关注，在平板显示领域中占据了主导地位，被广泛地应用到各行各业中。液晶显示器通常由彩膜基板和阵列基板对盒而成，现有技术中，用于显色的色阻通常设置于彩膜基板上，因此在对盒过程中产生的对盒偏差会导致漏光问题。COA技术(Color Filter on Array)是一种将彩色光阻制作在阵列基板上的技术，这种技术产生的阵列基板可以有效地减少由于对盒偏差产生的漏光问题，从而有效地提高像素开口率。
在COA技术的阵列基板上，为了使得ITO与阵列基板中的金属层电接触，就需要在色阻层上设置接触孔，以使得金属层暴露，从而在制作ITO层时，使得金属层通过接触孔与ITO电接触。随着产品设计的多样化，接触孔的布置越来越多。在PI配向膜的制作过程中，由于现有PI配向膜设备的局限性，即现有设备中产生的PI液滴最小为75ng，当PI液滴正中接触孔时，PI液会在接触孔内形成空气泡。如图1a为现有技术中配向膜液滴滴落在B色阻层内接触孔正上方时的截面示意图，图1b为现有技术中沿阵列基板法线方向看，接触孔与柱状隔离子的位置示意图。在图1b中，自左至右依次为R、G、B色阻，在三个色阻中分别设置有接触孔35，副隔离子一般不会与阵列基板向抵触，因此副隔离子在R、G色阻层上的投影为投影15，柱状隔离子63与B色阻层33相抵触。结合图1a和1b，当PI液滴31滴落在B色阻层33与金属层34形成的接触孔35的正上方时，由于接触孔35比较小，PI液滴31无法在接触孔35处分散开，从而在PI液滴31内部形成了空气泡32。在PI预烘烤制程中，随着温度的升高，空气泡32会膨胀爆破，从而导致PI堆积在接触孔35的周围，这样就导致PI堆积处的PI层过厚，如图2所示。在后续制作柱状隔离子过程中，当柱状隔离子对顶到PI层过厚处时，势必会造成此处的液晶盒间隙偏大。如图3所示，柱状隔离子63对顶到PI层堆积处64，导致此处的间隙H比正常显示区H’偏大，从而出现亮度差异，引起亮度斜纹。
发明内容
针对上述现有技术中存在的问题，本发明提出了一种COA技术的阵列基板及显示装置，在不改造升级现有PI配向膜设备的情况下，改善由于PI配向膜堆积导致的亮度差异，提升产品品质。
本发明提出的阵列基板，自下而上依次设置有基底层、金属层和色阻层，所述阵列基板上还设置有穿过所述色阻层并与所述金属层接触的接触孔，所述接触孔设置为当配向膜液滴滴落在所述接触孔的正上方时，所述配向膜液滴能够分散开。
由于配向膜液滴滴落在接触孔的正上方时，配向膜液滴能够分散开，这样就不会出现如现有技术中的空气泡。分散开的配向膜液滴均匀分布在接触孔及其周围，避免了由于配向膜堆积产生的间隙变大，从而避免了由此产生的显示亮度差异，提升了产品品质。
作为对本发明的进一步改进，当沿所述阵列基板的法线方向观测时，接触孔的形状为长圆形。这里的接触孔的形状不同于现有技术中的圆形或方形。长圆形的接触孔有两条相互垂直的轴线，长轴和短轴。当配向膜液滴滴落在接触孔正上方时，虽然配向膜液滴不能沿短轴方向分散，但能够沿长轴方向分散开，均匀分布在接触孔及其周围，避免了配向膜堆积导致的液晶盒间隙变大和由此产生的显示亮度差异。
作为对接触孔的进一步改进，接触孔的形状还可以设置为长方形。长方形的接触孔可以与长圆形的接触孔起到同样的技术效果。
作为对本发明的进一步改进，沿所述阵列基板的法线方向观测，相邻的所述接触孔之间彼此相连。
这样的接触孔仍可以使用现有技术中的方形或圆形，不同的是，相邻的接触孔连接在一起。当配向膜液滴滴落在接触孔的正上方时，由于其与另外的接触孔相连，配向膜液滴会随之向相邻的接触孔方向分散，从而使得配向膜均匀分布在接触孔及其周围。
作为对本发明的进一步改进，沿所述阵列基板的法线方线观测，所述接触孔的形状为圆形，相邻的所述接触孔之间通过沟槽相连。或者，所述接触孔的形状为方形，相邻的所述接触孔之间通过沟槽相连。
相邻的接触孔之间通过沟槽相连，滴落在接触孔处的配向膜液滴沿着沟槽方向分散开，均匀分布在接触孔及沟槽周围。
作为对本发明的阵列基板的进一步改进，该阵列基板还包括设置在所述色阻层上的配向膜。接触孔处的配向膜液滴分散开并均匀分布后，能够使得整个配向膜均匀分布在色阻层上，避免了由于配向膜堆积产生的液晶盒间隙差异和由此产生的显示亮度差异。
进一步，配向膜的成分包含聚酰亚胺树脂。聚酰亚胺树脂是常用的配向膜材料，方便易得。
本发明同时提出了一种显示装置，该显示装置包括相对设置的第一基板和第二基板，第一基板为上述所述的阵列基板。该阵列基板，自下而上依次设置有基底层、金属层和色阻层，所述阵列基板上还设置有穿过所述色阻层并与所述金属层接触的接触孔，所述接触孔设置为当配向膜液滴滴落在所述接触孔的正上方时，所述配向膜液滴能够分散开。从而避免了由于配向膜堆积产生的液晶盒间隙差异，提高了显示装置的亮度均一性。
总之，本发明提出的阵列基板，在不改造升级现有配向膜设备的情况下，通过对接触孔的结构的改进，使得滴落在接触孔的正上方的配向膜液滴能够分散开，均匀分布在接触孔及其周围，避免了由于配向膜堆积产生的液晶盒间隙差异，提高了使用该阵列基板的显示装置的亮度均一性。
附图说明
在下文中将基于实施例并参考附图来对本发明进行更详细的描述。其中：
图1a为现有技术中配向膜液滴滴落在B色阻层内的接触孔上方的截面示意图；
图1b为现有技术中沿阵列基板法线方向看，接触孔与隔离子的位置示意图；
图2为空气泡爆破后导致配向液堆积在接触孔周围的示意图；
图3为现有技术中，柱状隔离子对顶到配向液堆积处的结构示意图；
图4为本发明的阵列基板的接触孔处的剖面结构示意图；
图5为沿阵列基板法线方向观测，实施例一中的接触孔的形状示意图；
图6为沿阵列基板法线方向观测，实施例二中的接触孔的形状示意图；
图7为沿阵列基板法线方向观测，实施例三中的接触孔的形状示意图；
图8为沿阵列基板法线方向观测，实施例四中的接触孔的形状示意图；
图9为本发明的阵列基板的剖面结构示意图；
图10为本发明的显示装置的剖面结构示意图。
在附图中，相同的部件使用相同的附图标记。附图并未按照实际的比例。
具体实施方式
以下将结合附图对本发明的内容作出详细的说明，下文中的“上”“下”“左”“右”均为相对于图示方向，不应理解为对本发明的限制。
图4为本发明的阵列基板的示意图，该阵列基板自下而上依次设置有基底层55、金属层54和色阻层53。为了能够使得ITO层与金属层54电连接，该阵列基板上还设置有穿过色阻层53并与金属层54接触的接触孔52。为了防止滴落在接触孔52的正上方的配向膜液滴由于无法分散而产生气泡，本发明的阵列基板上的接触孔52的结构设置为当配向膜液滴滴落在接触孔52的正上方时，配向膜液滴能够分散开，如图4所示，分散开的配向膜液滴使得配向膜51均匀分布在接触孔52及其周围，避免了配向膜堆积。
下面将对处于B色阻层内的接触孔52的具体结构进行描述，在这里需要说明的是，接触孔52不仅设置在B色阻层内，还可以设置在其他颜色色阻层内。另外，在以下的实施例中，为了详细介绍本发明的内容，只给出了接触孔52的分布示意图，接触孔52的具体分布情况，需要根据实际需要确定。
实施例一：
图5为沿阵列基板法线方向观测，本实施例的位于B色阻层33内的接触孔521的形状示意图。在本实施例中，接触孔521的形状为长圆形，接触孔521具有长轴5211和短轴5212。当配向膜液滴滴落在接触孔521的正上方时，由于短轴5212较短，配向膜液滴无法沿短轴5212方向扩散，但其能够沿长轴5211方向扩散。由于配向膜液滴沿长轴5211方向扩散，从而避免了配向膜液滴内部出现空气泡，同时扩散开的配向膜液滴均匀分布在接触孔及其周围。这样就不会出现配向膜堆积，并避免了由此产生的液晶盒间隙变大和显示亮度差异。
实施例二：
图6为沿阵列基板法线方向观测，本实施例中的位于B色阻层内的接触孔522的形状示意图。在本实施例中，接触孔522的形状为长方形。与实施例一相似的是，接触孔522同样具有长轴5221和短轴5222。配向膜液滴能够沿长轴5221方向扩散，达到与实施例一相同的效果。当然，为了便于接触孔522的制作形成，接触孔522的边角处可以根据需要设置圆角。
实施例三：
图7为本实施例的接触孔523结构示意图。在本实施例中，接触孔523与现有技术中的接触孔相同，不同的是，相邻的接触孔523之间彼此相连。如图7所示，接触孔523与相邻的接触孔523’之间通过沟槽524相连。当配向膜液滴滴落在接触孔523的正上方时，虽然配向膜液滴无法沿接触孔523的周向扩散，但由于沟槽524的设置，使得配向膜液滴沿沟槽524朝向接触孔523’方向扩散，从而使得配向膜液滴分散开，均匀分布在接触孔523及沟槽524周围。
这里的接触孔可以为圆形，也可以为方形，还可以为其它的具体的形状。
实施例四：
图8为本实施例中的接触孔525的结构示意图。在本实施例中，接触孔525的形状为圆形，接触孔525与相邻的另一个接触孔525’相交连接。从而增大了接触孔在相交方向的长度，使得滴落在接触孔525上的配向膜液滴能够扩散至接触孔525’中，从而均匀分布在接触孔525及接触孔525’周围。
当然，相交连接的接触孔还可以为其它类似形状，如六边形等。
实施例五：
本实施例中的阵列基板，接触孔采用如实施例一、实施例二、实施例三或实施例四中的任意一种结构，所以，当配向膜液滴滴落在接触孔上方时，配向膜液滴能够扩散并均匀分布在接触孔的周围。本实施例中的阵列基板，在色阻层的上方还设置有配向膜56，如图9所示。配向膜覆盖整个阵列基板。由于接触孔52及其周围的配向膜51均匀分布，所以整体的配向膜56也是厚度均匀分布的。优选地，配向膜的成分包含聚酰亚胺树脂。
实施例六：
如图10所示，为本发明提出的显示装置的结构示意图。该显示装置包括相对设置的第一基板100和第二基板70，在第一基板100和第二基板70之间设置有柱状隔离子63。其中，第一基板100为本发明提出的阵列基板。第一基板100自下而上依次设置有基底层55、金属层54和色阻层53，同时，在色阻层53上方还设置有配向膜56。由于第一基板100的接触孔52处及周围的配向膜是均匀分布的，所以接触孔52周边的液晶盒间隙M与正常显示区的液晶盒间隙M’是相等的，从而避免了由于液晶盒间隙差异引起的亮度差异，提高了显示装置的亮度均一性。
最后说明的是，以上实施例仅用于说明本发明的技术方案而非限制，尽管参照较佳实施例对本发明进行了详细说明，本领域的普通技术人员应当理解，可以对本发明的技术方案进行修改或者等同替换，而不脱离本发明技术方案的宗旨和范围，其均应涵盖在本发明的权利要求范围当中。

Claims (8)

1.一种阵列基板，自下而上依次设置有基底层、金属层和色阻层，其特征在于，所述阵列基板上还设置有穿过所述色阻层并与所述金属层接触的接触孔，将相邻接触孔之间连通，且连通区域中包括长轴方向，使得滴落的配向液可沿着所述长轴方向流动。
2.根据权利要求1所述的阵列基板，其特征在于，沿所述阵列基板的法线方线观测，所述接触孔的形状为长圆形。
3.根据权利要求1所述的阵列基板，其特征在于，沿所述阵列基板的法线方线观测，所述接触孔的形状为长方形。
4.根据权利要求3所述的阵列基板，其特征在于，沿所述阵列基板的法线方线观测，相邻的所述接触孔之间通过沟槽相连。
5.根据权利要求1所述的阵列基板，其特征在于，沿所述阵列基板的法线方线观测，所述接触孔的形状为圆形，相邻的所述接触孔之间通过沟槽相连。
6.根据权利要求1至5任意一项所述的阵列基板，其特征在于，还包括设置在所述色阻层上的配向膜。
7.根据权利要求6所述的阵列基板，其特征在于，所述配向膜的成分包含聚酰亚胺树脂。
8.一种显示装置，其特征在于，包括相对设置的第一基板和第二基板，所述第一基板为权利要求1至7中任意一项所述的阵列基板。
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