CN106549021A - 柔性显示基板、柔性显示装置及其修复方法 - Google Patents

柔性显示基板、柔性显示装置及其修复方法 Download PDF

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CN106549021A
CN106549021A CN201611111271.XA CN201611111271A CN106549021A CN 106549021 A CN106549021 A CN 106549021A CN 201611111271 A CN201611111271 A CN 201611111271A CN 106549021 A CN106549021 A CN 106549021A
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flexible display
conductive
repair
display apparatus
conductive material
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CN106549021B (zh
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黄炜赟
徐元杰
刘庭良
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BOE Technology Group Co Ltd
Chengdu BOE Optoelectronics Technology Co Ltd
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BOE Technology Group Co Ltd
Chengdu BOE Optoelectronics Technology Co Ltd
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Priority to PCT/CN2017/091067 priority patent/WO2018099064A1/zh
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Abstract

本发明公开了一种柔性显示基板、柔性显示装置及其修复方法，属于显示技术领域。该柔性显示基板包括：衬底基板，以及设置在所述衬底基板上的多种导电结构；所述多种导电结构中的至少一种导电结构至少包括由自愈导电材料形成的修复层。因此在柔性显示装置的使用过程中，该自愈导电材料形成的修复层可以避免导电结构受损，或者，当导电结构受损时，该导电结构可以通过该自愈导电材料快速修复。

Description

柔性显示基板、柔性显示装置及其修复方法
技术领域
本发明涉及显示技术领域，特别涉及一种柔性显示基板、柔性显示装置及其修复方法。
背景技术
柔性显示装置是指显示面板可弯曲变形的显示装置。主要包括柔性有机电致发光显示装置、柔性电泳显示装置和柔性液晶显示装置等多种类型。
相关技术中，柔性显示装置中的衬底基板(例如阵列基板和彩膜基板)，以及设置在衬底基板上的各种导电结构(例如像素电极、公共电极、薄膜晶体管和信号走线等)一般由可弯曲的柔性材料制成。例如，衬底基板一般由塑胶基板或者薄玻璃制成。导电结构根据其性能的不同，所选用的材料也不同，例如，薄膜晶体管中的有源层一般采用氧化物半导体(如铟镓锌氧化物)或有机物半导体制成。
但是，由于导电结构自身的性能要求，其可选的材料范围较小，因此柔性显示装置中导电结构的柔性往往没有衬底基板的柔性好，衬底基板上的导电结构在柔性显示装置变形的过程中容易受损或失效。
发明内容
为了解决相关技术中柔性显示装置中导电结构容易受损或者失效的问题，本发明提供了一种柔性显示基板、柔性显示装置及其修复方法。所述技术方案如下：
第一方面，提供了一种柔性显示基板，所述柔性显示基板包括：
衬底基板，以及设置在所述衬底基板上的多种导电结构；
所述多种导电结构中的至少一种导电结构至少包括由自愈导电材料形成的修复层。
可选的，所述至少一种导电结构由所述自愈导电材料形成。
可选的，所述至少一种导电结构中还包括由导电材料形成的导电层，所述导电层与所述修复层叠加设置，且所述导电层位于所述修复层的任一面。
可选的，所述至少一种导电结构中还包括由导电材料形成的导电层，所述修复层包括第一修复层和第二修复层；
所述第一修复层、所述导电层和所述第二修复层依次叠加设置。
可选的，所述导电层由自愈导电材料形成，且所述导电层采用的自愈导电材料与所述修复层采用的自愈导电材料不同。
可选的，形成所述导电层的材料的电阻率小于预设阈值。
可选的，所述自愈导电材料能够通过加压或者加热的方式进行修复。
可选的，所述自愈导电材料包括镍、镍钛合金、镓或者导电凝胶。
可选的，所述导电结构包括像素电极、公共电极电极、金属走线、TFT的栅极、源极、漏极和有源层中的至少一种。
第二方面，提供了一种柔性显示装置，该柔性显示装置包括如第一方面所述的柔性显示基板。
第三方面，提供了一种柔性显示装置的修复方法，用于修复如第二方面所述的柔性显示装置，所述方法包括：
当所述柔性显示装置中的导电结构失效时，根据所述柔性显示装置中的导电结构所采用的自愈导电材料的类型，确定目标修复方式，所述目标修复方式包括加压修复或者加热修复；
采用所述目标修复方式，对所述柔性显示装置进行修复。
可选的，所述柔性显示装置中的导电结构所采用的自愈导电材料包括镍、镍钛合金、镓或者导电凝胶；
所述根据所述柔性显示装置中的导电结构所采用的自愈导电材料的类型，确定目标修复方式，包括：
当所述自愈导电材料为镍或者导电凝胶时，确定所述目标修复方式为加压修复；
当所述自愈导电材料为镍钛合金或者镓时，确定所述目标修复方式为加热修复。
可选的，当所述目标修复方式为加压修复时，所述采用所述目标修复方式，对所述柔性显示装置进行修复，包括：对所述柔性显示装置的两端施加压力，以修复所述柔性显示装置；
当所述目标修复方式为加热修复时，所述采用所述目标修复方式，对所述柔性显示装置进行修复，包括：
采用激光对所述柔性显示装置的失效处进行加热，以修复所述柔性显示装置。
本发明提供的技术方案带来的有益效果是：
本发明提供了一种柔性显示基板、柔性显示装置及其修复方法，该柔性显示基板包括：衬底基板，以及设置在该衬底基板上的多种导电结构；该多种导电结构中的至少一种导电结构至少包括由自愈导电材料形成的修复层。因此在柔性显示装置的使用过程中，该自愈导电材料形成的修复层可以避免导电结构受损，或者当导电结构受损时，该导电结构可以通过该自愈导电材料快速修复。
附图说明
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例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是本发明实施例提供的一种柔性显示基板的结构示意图；
图2是本发明实施例提供的另一种柔性显示基板的结构示意图；
图3是本发明实施例提供的又一种柔性显示基板的结构示意图；
图4-1是本发明实施例提供的一种导电结构的结构示意图；
图4-2是本发明实施例提供的另一种导电结构的结构示意图；
图5-1是本发明实施例提供的一种柔性曲面显示装置的结构示意图；
图5-2是本发明实施例提供的一种柔性双曲面显示装置的结构示意图；
图5-3是本发明实施例提供的一种柔性折叠显示装置的结构示意图；
图5-4是本发明实施例提供的一种柔性卷曲显示装置的结构示意图；
图5-5是本发明实施例提供的一种自由柔性显示装置的结构示意图；
图6是本发明实施例提供的一种柔性显示装置的修复方法的流程图；
图7是本发明实施例提供的一种加压修复的示意图；
图8是本发明实施例提供的一种加热修复的示意图。
具体实施方式
为使本发明的目的、技术方案和优点更加清楚，下面将结合附图对本发明实施方式作进一步地详细描述。
本发明实施例提供了一种柔性显示基板，参考图1，该柔性显示基板包括：
衬底基板10，以及设置在该衬底基板10上的多种导电结构。该多种导电结构可以包括TFT中的栅极、源极、漏极和有源层以及像素电极、公共电极和金属走线中的至少一种。
该多种导电结构中的至少一种导电结构20至少包括由自愈导电材料形成的修复层201。示例的，如图1所示，该衬底基板10上设置的像素电极或者公共电极20中可以包括一层由自愈导电材料形成的修复层201。
需要说明的是，本发明实施例中的自愈导电材料是指受损后能够自我修复且具有导电性能的材料。该自愈导电材料拥有结构上自愈合的能力，能够修复(例如通过加压或者加热的方式修复)由于长期机械使用造成的损伤。柔性显示装置中每种导电结构根据其性能的不同，其所采用的自愈导电材料的导电性也有所不同。示例的，金属走线、像素电极和公共电极需要采用导电性能较好的自愈导电材料，比如金属自愈材料；而对TFT中的有源层，则可以采用半导体自愈导电材料，比如金属氧化物自愈材料。
综上所述，本发明实施例提供了一种柔性显示基板，由于该柔性显示基板中的导电结构可以包括由自愈导电材料形成的修复层，因此在柔性显示装置的使用过程中，该自愈导电材料形成的修复层可以避免导电结构受损，或者，当导电结构受损时，该导电结构可以通过该自愈导电材料快速修复。
可选的，在本发明实施例中，设置在衬底基板上的多种导电结构中的每种导电结构都可以至少包括由自愈导电材料形成的修复层。若每种导电结构中都设置有该修复层，则可以极大降低柔性显示装置中的导电结构失效的概率，提高该柔性显示装置工作时的稳定性。
作为本发明实施例一种可选的实现方式，该多种导电结构中的至少一种导电结构可以由该自愈导电材料形成。也即是，该导电结构仅包括由自愈导电材料形成的修复层。示例的，如图2所示，假设该导电结构为设置在衬底基板10上的TFT 20中的各个导电层(例如栅极、源极、漏极和有源层)，则该TFT 20中的各个导电层可以直接由自愈导电材料形成。
直接由自愈导电材料形成柔性显示装置中的导电结构，可以避免增加柔性显示装置的厚度。并且，由于该自愈导电材料具有自愈性能，能够通过加热或者加压的方式进行修复，从而可以提高该导电结构受损后的修复效率。此外，若导电结构中采用的自愈导电材料能够通过施加压力的方式进行修复，则在柔性显示装置的使用过程中，随着用户不断弯折该柔性显示装置，可以使得其中受损的导电结构在压力作用下自动修复，从而有效降低了导电结构失效的概率。
作为本发明实施例另一种可选的实现方式，参考图1，该多种导电结构中的至少一种导电结构20中还可以包括由导电材料形成的导电层202，该导电层202与该修复层201叠加设置。也即是，该导电结构为双层结构，且该导电层202可以位于该修复层201的任一面。具体的，该导电层202可以设置在该修复层201的上方(即修复层201远离衬底基板10的一侧)，或者如图1所示，该修复层201也可以设置在导电层202的上方(即导电层202远离衬底基板10的一侧)，本发明实施例对该导电层和修复层的位置关系不做限定。
其中，该导电层可以由普通的导电材料制成，例如，像素电极或者公共电极中的导电层可以由氧化铟锡(英文：Indium-Tin Oxide；简称：ITO)制成。
进一步的，参考图3，该至少一种导电结构20可以包括依次叠加设置的第一修复层201、导电层202和第二修复层203。该设置在导电层202两侧的修复层可以起到保护导电层202的作用，降低导电层202受损的概率。示例的，如图4-1所示，假设用户使用柔性显示装置时，沿图4-1中所示的M1和M2方向弯折该柔性显示装置，则该柔性显示装置的导电结构中受拉应力F1一侧的第二修复层203会产生裂纹，该裂纹的深度与柔性显示装置的弯曲程度有关。当弯曲力矩进一步增加时，裂纹会沿着第二修复层203与导电层202的交界面延伸，而不会损坏中间的导电层202，从而可以避免该导电结构受损或者失效。
进一步的，若用户在使用柔性显示装置中的过程中，又沿图4-2中所示的M1和M2方向弯折该柔性显示装置，则该导电结构中原来产生有裂纹的第二修复层203由于此时受到了压应力F2，该裂纹会在该压应力F2的作用下自动修复，而受拉应力F1一侧的第一修复层201会产生裂纹，但依旧不会损坏该导电层202，导电结构能够正常工作。如此往复弯折，可以保证在柔性显示装置正常使用的过程中，断裂的修复层可以不断自愈，以达到保护该导电层的效果。
可选的，在本发明实施例中，该导电层202也可以由自愈导电材料形成，且该导电层202所采用的自愈导电材料与该修复层201采用的自愈导电材料不同。由于不同自愈导电材料的修复方式不同，当该受损或者失效的导电结构是由两种自愈导电材料形成时，可以采用针对其中任一种自愈导电材料的修复方式对该导电结构进行修复，提高了对导电结构进行修复时的灵活性。
需要说明的是，在本发明实施例中，形成该导电层的导电材料的电阻率可以小于预设阈值，也即是，该导电层可以由低电阻导电材料制成，避免电流经过该导电结构后的压降过大，影响显示效果。其中，该预设阈值可以为根据实际情况设置的，本发明实施例对该预设阈值的具体数值范围不做限定。
此外，在本发明实施例中，该自愈导电材料可以为能够通过加压或者加热的方式进行修复的金属、金属合金或者金属氧化物。例如可以包括镍、镍钛合金、镓或者导电凝胶等。其中，该导电凝胶可以为导电高分子凝胶。
参考图5-1至图5-5，本发明实施例还提供了一种柔性显示装置，该柔性显示装置可以包括如图1至图3任一所示的柔性显示基板。该柔性显示装置可以为图5-1所示的柔性曲面显示装置、图5-2所示的柔性双曲面显示装置、图5-3所示的柔性折叠显示装置、图5-4所示的柔性卷曲显示装置或者图5-5所示的自由柔性显示装置。其中，图5-1至图5-5中所示的箭头为各个柔性显示装置在使用过程中可能会受到的作用力F的方向。
本发明实施例还提供了一种柔性显示装置的修复方法，用于修复如图5-1至图5-5所示的柔性显示装置，参考图6，该方法可以包括：
步骤301、当柔性显示装置中的导电结构失效时，根据该柔性显示装置中的导电结构所采用的自愈导电材料的类型，确定目标修复方式，该目标修复方式包括加压修复或者加热修复。
在本发明实施例中，由于该多种导电结构是封装在柔性显示装置内部的，导电结构出现裂纹或者完全断裂时，可能无法直接通过肉眼观察到。但该导电结构出现裂纹或者完全断裂时，可能会导致其性能失效，进而使得该柔性显示装置显示异常，即柔性显示装置无法正常显示，或者显示屏上出现亮度异常的点等。当用户观察到柔性显示装置显示异常，或者通过显微镜等辅助器件观察到柔性显示装置内部导电结构受损时，可以根据该柔性显示装置中采用的自愈导电材料的类型，通过目标修复方式对该柔性显示装置进行修复。
具体的，在本发明实施例中，该柔性显示装置中的导电结构所采用的自愈导电材料可以包括镍、镍钛合金、镓或者导电凝胶等。当该导电结构中所采用的自愈导电材料为镍或者导电凝胶时，由于镍和导电凝胶具有在压力作用下自愈的性能，因此可以确定该目标修复方式为加压修复；当该导电结构所采用的自愈导电材料为镍钛合金或者镓时，由于镍钛合金或者镓具有在加热时能够自愈的性能，因此可以确定该目标修复方式为加热修复。
步骤302、采用该目标修复方式，对该柔性显示装置进行修复。
一方面，当该目标修复方式为加压修复时，可以对该柔性显示装置的两端施加一定大小的压力，以修复该柔性显示装置。示例的，图7是本发明实施例提供的一种柔性显示装置的示意图，该柔性显示装置中包括第一衬底基板101(例如阵列基板)和第二衬底基板102(例如彩膜基板)。当该柔性显示装置上出现失效处00时，可以沿图7所示的M1和M2方向弯折该柔性显示装置，此时该柔性显示装置中受损的导电结构中的自愈导电材料可以受到压力，并在该压力作用下自愈，从而修复该柔性显示装置。
需要说明的是，在该压力修复的过程中，若可以通过显微镜等辅助器件观察到柔性显示装置内部受损导电结构的裂纹，则可以根据该裂纹程度调节压力修复过程中所施加的压力大小，并可以根据该裂纹的方向，调节该施加的压力的方向，使该压力方向与该裂纹延伸方向相反。若无法观察到该受损导电结构的裂纹，则可以不断增加该施加的压力的大小，并不断调整该施加的压力的方向，直至该柔性显示装置能够正常显示。该压力修复方式较适用于需重复弯折的柔性折叠显示装置和需重复卷曲的柔性卷曲显示装置。
另一方面，当该目标修复方式为加热修复时，参考图8，可以采用激光对该柔性显示基板上的失效处00进行加热。使该受损导电结构中的自愈导电材料部分熔化，从而使得裂纹自愈。其中，若可以通过显微镜等辅助器件观察到柔性显示装置内部受损导电结构的裂纹，则可以根据该裂纹程度调节激光加热的能量。若无法观察到该受损导电结构的裂纹，则可以不断增加该激光加热的能量，直至该柔性显示装置能够正常显示。该加热修复方式较适用于柔性曲面显示装置和柔性双曲面显示装置。
需要说明的是，在实际应用中，也可采用其他加热方式对该柔性显示装置的失效处进行加热修复，本发明实施例对加热修复时具体采用的加热方式不做限定。
综上所述，本发明实施例提供了一种柔性显示装置的修复方法，当柔性显示装置中的导电结构失效时，通过加压或者加热的方式即可完成对该柔性显示装置的修复，该修复方法较为简单，修复效率较高。
以上所述仅为本发明的较佳实施例，并不用以限制本发明，凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (13)

1.一种柔性显示基板，其特征在于，所述柔性显示基板包括：
衬底基板，以及设置在所述衬底基板上的多种导电结构；
所述多种导电结构中的至少一种导电结构至少包括由自愈导电材料形成的修复层。
2.根据权利要求1所述的柔性显示基板，其特征在于，
所述至少一种导电结构由所述自愈导电材料形成。
3.根据权利要求1所述的柔性显示基板，其特征在于，
所述至少一种导电结构中还包括由导电材料形成的导电层，所述导电层与所述修复层叠加设置，且所述导电层位于所述修复层的任一面。
4.根据权利要求1所述的柔性显示基板，其特征在于，
所述至少一种导电结构中还包括由导电材料形成的导电层，所述修复层包括第一修复层和第二修复层；
所述第一修复层、所述导电层和所述第二修复层依次叠加设置。
5.根据权利要求3所述的柔性显示基板，其特征在于，
所述导电层由自愈导电材料形成，且所述导电层采用的自愈导电材料与所述修复层采用的自愈导电材料不同。
6.根据权利要求3所述的柔性显示基板，其特征在于，
形成所述导电层的导电材料的电阻率小于预设阈值。
7.根据权利要求1至6任一所述的柔性显示基板，其特征在于，
所述自愈导电材料能够通过加压或者加热的方式进行修复。
8.根据权利要求7所述的柔性显示基板，其特征在于，
所述自愈导电材料包括镍、镍钛合金、镓或者导电凝胶。
9.根据权利要求1至6任一所述的柔性显示基板，其特征在于，
所述导电结构包括像素电极、公共电极、金属走线、薄膜晶体管TFT的栅极、源极、漏极和有源层中的至少一种。
10.一种柔性显示装置，其特征在于，包括如权利要求1至9任一所述的柔性显示基板。
11.一种柔性显示装置的修复方法，其特征在于，用于修复如权利要求10所述的柔性显示装置，所述方法包括：
当所述柔性显示装置中的导电结构失效时，根据所述柔性显示装置中的导电结构所采用的自愈导电材料的类型，确定目标修复方式，所述目标修复方式包括加压修复或者加热修复；
采用所述目标修复方式，对所述柔性显示装置进行修复。
12.根据权利要求11所述的方法，其特征在于，所述柔性显示装置中的导电结构所采用的自愈导电材料包括镍、镍钛合金、镓或者导电凝胶；
所述根据所述柔性显示装置中的导电结构所采用的自愈导电材料的类型，确定目标修复方式，包括：
当所述自愈导电材料为镍或者导电凝胶时，确定所述目标修复方式为加压修复；
当所述自愈导电材料为镍钛合金或者镓时，确定所述目标修复方式为加热修复。
13.根据权利要求11或12所述的方法，其特征在于，
当所述目标修复方式为加压修复时，所述采用所述目标修复方式，对所述柔性显示装置进行修复，包括：
对所述柔性显示装置的两端施加压力，以修复所述柔性显示装置；
当所述目标修复方式为加热修复时，所述采用所述目标修复方式，对所述柔性显示装置进行修复，包括：
采用激光对所述柔性显示装置的失效处进行加热，以修复所述柔性显示装置。
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