CN105185809B - 柔性显示屏的制作方法、柔性玻璃基板及柔性显示屏 - Google Patents
柔性显示屏的制作方法、柔性玻璃基板及柔性显示屏 Download PDFInfo
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Abstract
本发明提供一种柔性显示屏的制作方法、柔性玻璃基板及柔性显示屏。柔性显示屏的制作方法包括以下步骤:在柔性玻璃基板的一侧形成TFT层。在所述柔性玻璃基板的另一侧形成高分子增强层。将所述高分子增强层进行固化。在所述TFT层上形成显示层。在所述柔性玻璃基板的、所述TFT层所在的一侧形成封装层。该柔性玻璃基板的一侧设有高分子增强层。该柔性显示屏包括柔性玻璃基板、TFT层、高分子增强层、显示层和封装层。本发明克服了柔性玻璃基板易碎的缺点,增强了柔性玻璃基板的抗压强度,因此提高了产品的质量。
Description
技术领域
本发明涉及显示技术领域,特别是涉及一种柔性显示屏的制作方法、柔性玻璃基板及柔性显示屏。
背景技术
柔性显示器又称为可卷曲显示器,是采用柔性材料制成的可视面板而构成的可任意弯曲变形的显示装置,其包括电子纸、柔性液晶显示器和柔性有机电致发光OLED(Organic Light-Emitting Diode)显示器件。柔性显示器具有诸多优点:重量轻、体积小、薄型化,携带方便;耐高低温、耐冲击、抗震能力更强,能适应的工作环境更广等优点。
其中,OLED显示器更具备自发光、高亮度、宽视角、高对比度、可挠曲、低能耗等特性,被广泛应用在手机屏幕、电脑显示器、全彩电视等。OLED显示技术采用非常薄的有机材料发光层和柔性基板,当有电流通过时,这些有机材料就会发光。但是由于有机材料易与水氧反应,很少量的水蒸气和氧气就能损害有机发光材料,使器件的发光性能劣化。因此,柔性OLED显示器不仅要求基板具有可弯曲的特点,同时应具有良好的水氧阻隔性。
目前柔性OLED显示器的制作方法一般包括,使用高分子材料的塑料基板,在塑料基板上形成无机薄膜层,并形成TFT及OLED device层,最后使用有机/无机材料堆叠形式形成薄膜封装。该方法的缺点是,大多数的塑料高分子材料基板无法承受高温制程,且需在基板上形成有足够阻水能力的无机薄膜层,增加了制程的难度;另一种方法是,使用柔性玻璃基板,柔性玻璃基板表面特性较塑料基板好,可耐高温,且其本身阻水能力强,无需额外制作无机薄膜层,制程较为简单。但柔性玻璃基板易碎,降低了产品质量,限制了生产的良率及产品的应用。
发明内容
本发明提供一种柔性显示屏的制作方法、柔性玻璃基板及柔性显示屏,能够解决现有技术存在的因柔性玻璃基板易碎而导致产品质量下降的问题。
为解决上述技术问题,本发明采用的一个技术方案是:提供一种柔性显示屏的制作方法,该方法包括以下步骤:在柔性玻璃基板的一侧形成TFT层。在所述柔性玻璃基板的另一侧形成高分子增强层。将所述高分子增强层进行固化。在所述TFT层上形成显示层。在所述柔性玻璃基板的、所述TFT层所在的一侧形成封装层。
其中,所述高分子增强层为PET、PI或者环氧树脂。
其中,所述高分子增强层通过旋涂、溅射、喷涂或者丝网印刷中至少一种方式形成。
其中,所述显示层为OLED层。
其中,所述OLED层包括阳极金属层、有机层和阴极金属层;所述OLED层通过喷墨印刷或者真空蒸镀的方法并以平面成膜或者卷对卷制程形成。
其中,所述封装层的形成方式为面封装或薄膜封装。
为解决上述技术问题,本发明采用的另一个技术方案是:提供一种柔性玻璃基板,所述柔性玻璃基板的一侧设有高分子增强层。
其中,所述高分子增强层为PET、PI或者环氧树脂。
为解决上述技术问题,本发明采用的又一个技术方案是:提供一种柔性显示屏,该柔性显示屏包括TFT层、显示层、封装层以及上述柔性玻璃基板;
其中,所述TFT层设在所述柔性玻璃基板上、与所述高分子增强层所在侧相对的另一侧,所述显示层设在所述TFT层之上,所述封装层设在所述TFT层所在的、所述柔性玻璃基板的一侧。
其中,所述显示层为OLED层。
本发明的有益效果是:区别于现有技术的情况,通过在柔性玻璃基板的一侧形成高分子增强层,由于高分子材料柔韧性强、抗压强度高、机械强度高的特点,从而能缓解柔性玻璃表面由于弯曲所产生的应力集中,克服了柔性玻璃基板易碎的缺点,增强了柔性玻璃基板的抗压强度,因而实现了在利用柔性玻璃好的可耐高温,表面特性好,优异的阻水性等特点的同时又能获得强柔韧性以及高抗压强度,并且还提高了柔性显示屏的封装效能及显示效果,因此提高了产品的质量。此外,本发明在柔性玻璃基板一侧设高分子增强层后,能使后续制程可选择的方式增多。
附图说明
图1是本发明一种柔性显示屏的制作方法第一实施例的流程示意图;
图2是本发明一种柔性显示屏的制作方法第一实施例的制作过程示意图;
图3是本发明一种柔性显示屏的制作方法第二实施例的流程示意图;
图4是本发明一种柔性玻璃基板实施例的截面结构示意图;
图5是本发明一种柔性显示屏实施例的截面结构示意图。
具体实施方式
下面结合附图和具体实施方式对本发明进行详细说明。
请参阅图1和图2,本发明提供了一种柔性显示屏的制作方法,具体包括以下步骤:
S100、在柔性玻璃基板10的一侧形成TFT层11。
柔性玻璃基板10是一种轻薄透明的玻璃,人们可以轻松将其压弯。TFT(Thin FilmTransistor)即薄膜晶体管用于驱动显示屏上的液晶像素点。
S101、在柔性玻璃基板10的另一侧形成高分子增强层12。
玻璃是典型的脆性材料,柔性玻璃虽然可弯曲,但是其抗压强度仍然比较低,表面与内部存在缺陷,在外力与环境介质作用下极易发生裂纹扩展。
高分子材料具有一定的柔韧性,可产生弹性形变,能缓解玻璃表面由于弯曲所产生的应力集中。此外高分子增强层12应具有与玻璃粘附性强,机械强度高,抗压强度高等特点。
因此,在柔性玻璃基板10的一侧形成高分子增强层12,并且使该高分子增强层12一直粘附在柔性玻璃基板10上,从而可以利用高分子的柔韧性来改善柔性玻璃,以增强其抗压强度。
本发明通过先在柔性玻璃基板10的一侧形成TFT层11,然后再在该柔性玻璃基板10的另一侧形成高分子增强层12,避免了TFT高温制程对高分子增强层12的损害,且后续没有高温制程,避免了玻璃基板与高分子层由于膨胀系数不一样导致的二者剥离现象。
举例而言,高分子增强层12可以是PET、PI或者环氧树脂。例如,PET是指聚对苯二甲酸乙二醇酯(polyethylene terephthalate),其具有良好的力学性能,冲击强度高,耐折性好,同时具有优良的耐高、低温性能,气体和水蒸气渗透率低,即拥有优良的阻气、水、油及异味性能,并且透明度高,可阻挡紫外线,光泽性好。因此,使用PET作为高分子增强层12,能提高柔性玻璃的抗压强度的同时,还能提高整个柔性玻璃基板10的防水、耐高温、耐低温的性能,并且还不会影响柔性玻璃本身的透明度和光泽度等特性。PI(Polyimide),即聚酰亚胺,具有耐磨耗、耐高温、高抗冲击性能等优点。环氧树脂具有良好的物理、化学性能,它对金属和非金属材料的表面具有优异的粘接强度,且柔韧性较好。当然,该高分子增强层12还可以是其它具有柔韧性、粘附性强、抗压强度高的高分子材料,而不限于上述的材料。
高分子增强层12的形成可以通过旋涂、溅射、喷涂或者丝网印刷中至少一种方式形成。其中,旋涂是旋转涂抹法的简称,旋涂法包括配料,高速旋转,挥发成膜三个步骤,通过控制匀胶的时间,转速,滴液量以及所用溶液的浓度、粘度来控制成膜的厚度。溅射工艺具有基体温度低,薄膜质纯,组织均匀密实,牢固性和重现性好等优点。喷涂工艺则是通过喷枪或碟式雾化器,借助于压力或离心力,分散成均匀而微细的雾滴,施涂于被涂物表面的涂装方法,该方法具有生产效率高的特点。丝网印刷则具有版面柔软、压印力小、覆盖力强等优点。实际生产中,可以根据高分子材料的特性、形成的环境、条件等实际情况选择形成高分子增强层12的方式。
S102、将高分子增强层12进行固化。
其中,固化的方式可以是烘烤或UV照射。举例而言,本实施例的高分子增强层12是PET,通过UV照射的方式将其固化在柔性玻璃基板10上。
S103、在TFT层11上形成显示层13。
在本实施例中,显示层13为OLED(Organic Light-Emitting Diode)层,即有机发光二极管层,具体而言,OLED层包括阳极金属层、有机层和阴极金属层。OLED层通过喷墨印刷或者真空蒸镀的方法并以平面成膜或者卷对卷制程形成。具体地,本实施例是采用喷墨印刷的方法以平面成膜的方式将OLED层形成在TFT层11上。喷墨印刷机由系统控制器、喷墨控制器、喷头、承印物驱动机构等组成。有机物则在喷墨控制器的控制下,从喷头的喷嘴喷出喷印在承印物上。当然,若该柔性显示屏电子纸或者柔性液晶显示屏等的时候,该显示层13则会是相应的显示屏上的显示层13。
S104、在柔性玻璃基板10的、TFT层11所在的一侧形成封装层14。
由于柔性玻璃基板10相对与硬质的玻璃基板来说,对水、氧气的阻挡能力较弱,为了延长显示屏的使用寿命,需要在柔性玻璃基板10上进行有效封装。具体而言,封装层14的形成方式为面封装或薄膜封装。其中,薄膜封装为采用无机或有机材料堆叠,封装材料可以是SiNx/SiOC/SiNx,该方法是在低温下沉积具有水气阻挡性能的薄膜,来实现对显示器件的封装。面封装则是在封装盖板上先粘附一层具有高阻水性的固态胶,然后与基板贴合完成封装。
区别于现有技术,本发明通过在柔性玻璃基板的一侧形成高分子增强层,由于高分子材料柔韧性强、抗压强度高、机械强度高的特点,从而能缓解柔性玻璃表面由于弯曲所产生的应力集中,克服了柔性玻璃基板易碎的缺点,增强了柔性玻璃基板的抗压强度,因而实现了在利用柔性玻璃好的可耐高温,表面特性好,优异的阻水性等特点的同时又能获得强柔韧性以及高抗压强度,并且还提高了柔性显示屏的封装效能及显示效果,因此提高了产品的质量。此外,本发明在柔性玻璃基板一侧设高分子增强层后,能使后续制程可选择的方式增多。
请参阅图2和图3,是本发明柔性显示屏的制作方法的另一实施例的流程示意图。具体地,本实施例的制作方法包括以下步骤:
S200、在柔性玻璃基板的一侧形成TFT层。
S201、在柔性玻璃基板的另一侧形成PI增强层。具体地,本实施例通过溅射的方式形成PI增强层。
S202、将PI增强层进行固化。本步骤中,通过烘烤的方式将PI增强层进行固化。固化包括预固化和主固化,其中,预固化温度为90℃-150℃,例如本实施例为100℃,固化时间为1min-4min,例如本实施例为2min。主固化的温度为200℃-270℃,例如230℃,或者本实施例为250℃,主固化时间为25min-33min,本实施例为固化30min。
S203、在TFT层上形成OLED层。本实施例中,OLED层通过真空蒸镀的方式形成,并且使用卷对卷制程的方式形成。
S204、在柔性玻璃基板的、TFT层所在的一侧使用形成封装层。本实施例是使用SiNx/SiOC/SiNx作为材料使用薄膜封装的方式形成封装层。
本发明还提供了一种柔性玻璃基板,请参阅图4,该柔性玻璃基板30的一侧设有高分子增强层32。
具体地,该高分子增强层32为PET、PI或者环氧树脂,该高分子增强层32通过旋涂、溅射、喷涂或者丝网印刷中至少一种方式形成在柔性玻璃基板30上。
本发明还提供了一种柔性显示屏,请参阅图5,该柔性显示屏包括TFT层41、显示层43、封装层44以及柔性玻璃基板40,其中,柔玻璃基板的一侧设有高分子增强层42。
其中,TFT层41设在柔性玻璃基板40上、与述高分子增强层42所在侧相对的另一侧,显示层43设在TFT层41之上,封装层44设在TFT层41所在的、柔性玻璃基板40的一侧。
具体地,该高分子增强层42为PET、PI或者环氧树脂,该高分子增强层42通过旋涂、溅射、喷涂或者丝网印刷中至少一种方式形成在柔性玻璃基板40上。在本实施例中,显示层43为OLED层。
以上所述仅为本发明的实施方式,并非因此限制本发明的专利范围,凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换,或直接或间接运用在其他相关的技术领域,均同理包括在本发明的专利保护范围内。
Claims (8)
1.一种柔性显示屏的制作方法,其特征在于,包括以下步骤:
在柔性玻璃基板的一侧形成TFT层;
在所述柔性玻璃基板的另一侧形成高分子增强层,以避免TFT高温制程对所述高分子增强层的损害以及所述柔性玻璃基板与所述高分子增强层由于膨胀系数不一样导致的二者剥离现象;
将所述高分子增强层进行固化;
在所述TFT层上形成显示层;
在所述柔性玻璃基板的、所述TFT层所在的一侧形成封装层。
2.根据权利要求1所述的方法,其特征在于,所述高分子增强层为PET、PI或者环氧树脂。
3.根据权利要求2所述的方法,其特征在于,所述高分子增强层通过旋涂、溅射、喷涂或者丝网印刷中至少一种方式形成。
4.根据权利要求3所述的方法,其特征在于,所述显示层为OLED层。
5.根据权利要求4所述的方法,其特征在于,所述OLED层包括阳极金属层、有机层和阴极金属层;所述OLED层通过喷墨印刷或者真空蒸镀的方法并以平面成膜或者卷对卷制程形成。
6.根据权利要求5所述的方法,其特征在于,所述封装层的形成方式为面封装或薄膜封装。
7.一种柔性显示屏,其特征在于,包括TFT层、显示层、封装层以及柔性玻璃基板,所述柔性玻璃基板的一侧设有高分子增强层;
其中,所述TFT层设在所述柔性玻璃基板上、与所述高分子增强层所在侧相对的另一侧,所述显示层设在所述TFT层之上,所述封装层设在所述TFT层所在的、所述柔性玻璃基板的一侧,其中,所述TFT层先设置在所述柔性玻璃基板上,所述高分子增强层再设置在所述柔性玻璃基板上,以避免TFT高温制程对所述高分子增强层的损害以及所述柔性玻璃基板与所述高分子增强层由于膨胀系数不一样导致的二者剥离现象。
8.根据权利要求7所述的柔性显示屏,其特征在于,所述显示层为OLED层。
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CN106448481A (zh) * | 2016-10-21 | 2017-02-22 | 昆山国显光电有限公司 | 一种显示器及其制备方法 |
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CN113169148A (zh) * | 2018-12-19 | 2021-07-23 | 深圳市柔宇科技股份有限公司 | 一种柔性模组的制作方法及柔性模组 |
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CN111787143A (zh) * | 2020-06-30 | 2020-10-16 | 萍乡伊博智能科技有限公司 | 一种玻璃手机后盖板加工方法 |
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