CN109087894A - 柔性显示器 - Google Patents

柔性显示器 Download PDF

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Publication number
CN109087894A
CN109087894A CN201810782121.4A CN201810782121A CN109087894A CN 109087894 A CN109087894 A CN 109087894A CN 201810782121 A CN201810782121 A CN 201810782121A CN 109087894 A CN109087894 A CN 109087894A
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tft
film transistor
thin film
flexible display
conducting wire
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张福阳
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Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Priority to CN201810782121.4A priority Critical patent/CN109087894A/zh
Priority to US16/336,108 priority patent/US10692897B2/en
Priority to PCT/CN2018/110137 priority patent/WO2020015211A1/zh
Publication of CN109087894A publication Critical patent/CN109087894A/zh
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Abstract

本揭示提供一种柔性显示器，包含：一基板；多个薄膜晶体管，在所述基板上沿着一第一方向间隔排列设置；多个间隔部，在所述基板上沿着所述第一方向间隔排列设置，且每一所述间隔部设置在两相邻的所述薄膜晶体管之间；以及至少一导线，用于电性连接两相邻的所述薄膜晶体管，其中所述至少一导线设置在所述间隔部内。本揭示通过在基板沿着第一方向上，相邻的薄膜晶体管之间使用弧形的导线进行电性连接，进而能有效地防止薄膜晶体管之间的导线断裂。

Description

柔性显示器
技术领域
本揭示涉及一种显示器，特别是涉及一种具有可拉伸和可压缩特性的柔性显示器。
背景技术
随着显示技术的发展，液晶显示器(Liquid Crystal Display，LCD)等平面显示装置因具有高画质、省电、薄型及应用范围广等优点，而被广泛地应用于手机、电视、个人数字助理、数字相机、笔记本电脑、计算机等各种消费性电子产品中。
近年来，柔性显示装置具有轻薄、便携、可弯折等优点，越来越受到人们的青睐。现有的柔性显示面板由于受到结构、材料、设备等方面的限制，主要的发展重点集中在显示面板的可弯曲和可折叠性上。为了提升显示装备具有更多的可操作性和更生动性来增加用户的体验乐趣，显示器需要的不仅是弯折特性，可拉伸和可压缩特性也非常重要。
在现有的具有可拉伸和可压缩特性的柔性显示器中，是通过将柔性材料覆盖在显示基板上的各种显示元件以进行封装，进而保护这些元件避免受损。然而，通过柔性材料虽然可保护原先的显示元件，却无法在弯折或拉伸面板时，确保连接显示元件(例如薄膜晶体管)的导线不会因柔性显示装置的拉伸、压缩和弯折而断裂。
有鉴于此，有必要提出一种柔性显示器，以解决现有技术中存在的问题。
发明内容
为解决上述现有技术的问题，本揭示的目的在于提供一种具有可拉伸和可压缩特性的柔性显示器。通过改变传统的柔性基板的结构，实现柔性显示器更广泛的变形模式。
为达成上述目的，本揭示提供一种柔性显示器，其特征在于，所述柔性显示器包含：一基板；多个薄膜晶体管，在所述基板上沿着一第一方向间隔排列设置；多个间隔部，在所述基板上沿着所述第一方向间隔排列设置，且每一所述间隔部设置在两相邻的所述薄膜晶体管之间，以及至少一导线，用于电性连接两相邻的所述薄膜晶体管，其中所述至少一导线设置在所述间隔部内。
本揭示其中之一优选实施例中，所述间隔部与所述多个薄膜晶体管的顶面在同一水平面上。
本揭示其中之一优选实施例中，所述至少一导线的长度大于两相邻的所述薄膜晶体管之间的间距。
本揭示其中之一优选实施例中，两相邻的所述薄膜晶体管之间的所述间距介于100纳米至1000纳米之间。
本揭示其中之一优选实施例中，所述至少一导线的所述长度介于150纳米至1500纳米之间。
本揭示其中之一优选实施例中，所述间隔部的材料包含聚酰亚胺。
本揭示其中之一优选实施例中，所述至少一导线包含一第一导线，用于电性连接两相邻的所述薄膜晶体管的第一金属层。
本揭示其中之一优选实施例中，所述第一金属层包含所述薄膜晶体管的栅极。
本揭示其中之一优选实施例中，所述至少一导线包含一第二导线，用于电性连接两相邻的所述薄膜晶体管的第二金属层。
本揭示其中之一优选实施例中，所述第二金属层包含所述薄膜晶体管的源极和漏极。
本揭示其中之一优选实施例中，所述薄膜晶体管包含：P型低温多晶硅层，设置在所述基板上；栅极绝缘层，设置在所述P型低温多晶硅层上；第一金属层，设置在所述栅极绝缘层上；层间绝缘层，设置在所述第一金属层上；以及第二金属层，设置在所述层间绝缘层上，并且经由贯穿所述栅极绝缘层和所述层间绝缘层的过孔与所述P型低温多晶硅层接触。
本揭示其中之一优选实施例中，所述至少一导线呈弧形弯曲。
相较于先前技术，本揭示通过将薄膜晶体管之间采用间隔部填充，因此柔性显示器进行弯折时，应力会集中在间隔部，从而防止了薄膜晶体管因为折弯而发生特性改变或断裂的风险。再者，本揭示通过沿着基板X方向，相邻的薄膜晶体管之间使用弧形的导线进行电性连接，并且导线设置在间隔部内而不会位在薄膜晶体管的上方位置，藉此设计能有效地防止薄膜晶体管之间的导线断裂。
附图说明
图1显示本揭示的优选实施例的柔性显示器的立体剖面示意图；
图2显示图1的柔性显示器的薄膜晶体管的结构示意图；以及
图3显示图1的柔性显示器的A部分的放大示意图，显示导线和薄膜晶体管的连接关系。
具体实施方式
为了让本揭示的上述及其他目的、特征、优点能更明显易懂，下文将特举本揭示优选实施例，并配合所附图式，作详细说明如下。
请参照图1，其显示本揭示的优选实施例的柔性显示器1的立体剖面示意图。柔性显示器1为一种包含基于现有柔性显示技术下的新型柔性薄膜晶体管显示面板。基于该技术下制作的柔性显示面板不仅可实现弯曲、折叠的性能，更具有可拉伸可压缩的能力。柔性显示器1包含基板10、间隔部20、多个薄膜晶体管30、和导线41、42。基板10是选自于一种可弯折和拉伸的柔性基板。多个薄膜晶体管30设置在基板10上，并且沿着基板10第一方向(X方向)间隔排列设置。多个间隔部20同样设置在基板10上，并且沿着基板10X方向间隔排列设置。每一间隔部20设置在两相邻的薄膜晶体管30之间。可选地，在制作时是先在基板10上形成以阵列排列的多个薄膜晶体管30，并且相邻的两个薄膜晶体管30彼此间隔设置。接着，在相邻的两个薄膜晶体管30的间隔中填充有机材料以形成间隔部20，其中所述有机材料优选包含聚酰亚胺。
如图1所示，间隔部20的顶面S1与多个薄膜晶体管30的顶面S2在同一水平面上。也就是说，间隔部20的材料仅仅会填充在相邻的两个薄膜晶体管30的间隔中，而不会覆盖在薄膜晶体管30的上方。另外，导线41、42设置在间隔部20内，用于电性连接两相邻的薄膜晶体管30，其中导线41、42之具体设计将详述于后。
请参照图2，其显示图1的柔性显示器1的薄膜晶体管30的结构示意图。薄膜晶体管30包含P型低温多晶硅层31、栅极绝缘层32、第一金属层33、层间绝缘层34、和第二金属层35。P型低温多晶硅层31形成在基板10上。可选地，在制作时，先在基板10上形成完全地覆盖住基板10的多晶硅层。接着，对多晶硅层进行图形化处理以形成多个间隔排列的子区块，接着再对上述子区块进行P型参杂，进而得到作为源极接触区和漏极接触区的P型低温多晶硅层31。
如图2所示，栅极绝缘层32设置在P型低温多晶硅层31上，并且覆盖住基板10以及P型低温多晶硅层31。第一金属层33设置在栅极绝缘层32上，并且第一金属层33是经由图形化处理后而获得，其是作为薄膜晶体管30的栅极。层间绝缘层34设置在第一金属层33上。具体来说，层间绝缘层34会覆盖住栅极绝缘层32和第一金属层33。在形成层间绝缘层34之后，会对栅极绝缘层32与层间绝缘层34进行图形化处理，以得到贯穿栅极绝缘层32与层间绝缘层34的过孔H。过孔H可将对应于所述源极接触区和漏极接触区的P型低温多晶硅层31的位置曝露出来。第二金属层35设置在层间绝缘层34上，并且第二金属层35是经由图形化处理后而获得，其是作为薄膜晶体管30的源极和漏极，其中源极和漏极分别经由各自的过孔H与所述源极接触区和漏极接触区接触。
请参照图3，其显示图1的柔性显示器1的A部分的放大示意图，显示导线41、42和薄膜晶体管30的连接关系。位在间隔部20内的导线包含第一导线41和第二导线42。第一导线41用于电性连接两相邻的薄膜晶体管30的第一金属层33，即用于电性连接两相邻的薄膜晶体管30的栅极。又，第二导线42用于电性连接两相邻的薄膜晶体管30的第二金属层35，即用于电性连接两相邻的薄膜晶体管30的源极和漏极。应当注意的是，第一导线41和第二导线42的长度大于两相邻的薄膜晶体管30之间的间距D。具体来说，第一导线41和第二导线42呈弧形弯曲，并且第一导线41和第二导线42的弧度、宽度、和长度是随着X方向上两相邻的薄膜晶体管30的间距D大小而变化，也会随着所用基板10或间隔部20的材料而变化。可选地，两相邻的薄膜晶体管30之间的间距D介于100纳米至1000纳米之间，以及第一导线41和第二导线42的长度介于150纳米至1500纳米之间。由于基板10或间隔部20是可拉伸和压缩变形的，而薄膜晶体管30可变形性有限，因此所制备的柔性显示器1不但具有可拉伸和压缩变形的特性，还同时保证了薄膜晶体管30结构的稳定性。
综上所述，本揭示通过将薄膜晶体管30之间采用间隔部20填充，因此柔性显示器1进行弯折时，应力会集中在间隔部20，从而防止了薄膜晶体管30因为折弯而发生特性改变或断裂的风险。再者，本揭示通过沿着基板10X方向上，相邻的薄膜晶体管30之间使用弧形的导线41、42进行电性连接，并且导线41、42设置在间隔部20内而不会位在薄膜晶体管30的上方位置，藉此设计能有效地防止薄膜晶体管30之间的导线41、42断裂。
以上仅是本揭示的优选实施方式，应当指出，对于所属领域技术人员，在不脱离本揭示原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本揭示的保护范围。

Claims (12)

1.一种柔性显示器，其特征在于，所述柔性显示器包含：
一基板；
多个薄膜晶体管，在所述基板上沿着一第一方向间隔排列设置；
多个间隔部，在所述基板上沿着所述第一方向间隔排列设置，且每一所述间隔部设置在两相邻的所述薄膜晶体管之间；以及
至少一导线，用于电性连接两相邻的所述薄膜晶体管，其中所述至少一导线设置在所述间隔部内。
2.如权利要求1的柔性显示器，其特征在于，所述间隔部与所述多个薄膜晶体管的顶面在同一水平面上。
3.如权利要求1的柔性显示器，其特征在于，所述至少一导线的长度大于两相邻的所述薄膜晶体管之间的间距。
4.如权利要求3的柔性显示器，其特征在于，两相邻的所述薄膜晶体管之间的所述间距介于100纳米至1000纳米之间。
5.如权利要求3的柔性显示器，其特征在于，所述至少一导线的所述长度介于150纳米至1500纳米之间。
6.如权利要求1的柔性显示器，其特征在于，所述间隔部的材料包含聚酰亚胺。
7.如权利要求1的柔性显示器，其特征在于，所述至少一导线包含一第一导线，用于电性连接两相邻的所述薄膜晶体管的第一金属层。
8.如权利要求7的柔性显示器，其特征在于，所述第一金属层包含所述薄膜晶体管的栅极。
9.如权利要求1的柔性显示器，其特征在于，所述至少一导线包含一第二导线，用于电性连接两相邻的所述薄膜晶体管的第二金属层。
10.如权利要求9的柔性显示器，其特征在于，所述第二金属层包含所述薄膜晶体管的源极和漏极。
11.如权利要求1的柔性显示器，其特征在于，所述薄膜晶体管包含：
P型低温多晶硅层，设置在所述基板上；
栅极绝缘层，设置在所述P型低温多晶硅层上；
第一金属层，设置在所述栅极绝缘层上；
层间绝缘层，设置在所述第一金属层上；以及
第二金属层，设置在所述层间绝缘层上，并且经由贯穿所述栅极绝缘层和所述层间绝缘层的过孔与所述P型低温多晶硅层接触。
12.如权利要求1的柔性显示器，其特征在于，所述至少一导线呈弧形弯曲。
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