CN105892124B - 一种压力触控式液晶显示装置 - Google Patents

一种压力触控式液晶显示装置 Download PDF

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CN105892124B
CN105892124B CN201610399243.6A CN201610399243A CN105892124B CN 105892124 B CN105892124 B CN 105892124B CN 201610399243 A CN201610399243 A CN 201610399243A CN 105892124 B CN105892124 B CN 105892124B
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李曼
黄耀立
郭星灵
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Wuhan China Star Optoelectronics Technology Co Ltd
TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
Wuhan China Star Optoelectronics Technology Co Ltd
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Priority to PCT/CN2016/093128 priority patent/WO2017210984A1/zh
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    • GPHYSICS
    • G02OPTICS
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    • G02F1/13338Input devices, e.g. touch panels
    • GPHYSICS
    • G02OPTICS
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    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
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    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
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    • G06F3/0414Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using force sensing means to determine a position
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
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    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
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    • G02F1/00Devices 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
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    • G02F1/13Devices 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

本发明提供了一种压力触控式液晶显示装置及其制造方法。该压力触控式液晶显示装置包括:触控面板,其用于接收触控操作;液晶显示模组,其与触控面板相对地设置在触控面板的一侧,所述压力触控式液晶显示装置还包括形成在触控面板的与液晶显示模组相对的表面上的压力触控膜。该压力触控式液晶显示装置的制造方法包括如下步骤:将压力触控膜形成在触控面板的一个表面上;使压力触控膜面对液晶显示模组,将触控面板与液晶显示模组贴合。本发明的压力触控式液晶显示装置及其制造方法有效地解决了目前压感触控结构中的压力触控膜易受背光热损害和压力触控不均匀等问题,良好地提高了压力触控的品质。

Description

一种压力触控式液晶显示装置
技术领域
本发明属于液晶显示器技术领域。具体地说,本发明涉及一种压力触控式液晶显示装置以及该压力触控式液晶显示装置的制造方法。
背景技术
随着例如手机等电子设备逐渐智能化,作为全新触控技术的压力触控技术已逐渐走入日常生活。通过压力触控技术所实现的功能在于,电子设备可以较容易地感知轻压以及重压的力度,并以此调出不同的对应功能。实现压力触控功能的核心构件在于所谓的压力触控膜(force film),这层薄膜上通常是例如用丝网印刷的工艺打印上特定的压力触控的氧化铟锡图案(ITO pattern),如图1 所示,可通过在薄膜基板110上印刷传感器阵列120来形成压力触控薄膜。
目前的压力触控结构以电容式居多,即压力触控膜与液晶显示模组中某个金属层(例如中框)形成一个电容,该电容中间需具有易形变的绝缘介质(例如空气等)。当手指按压时,压力触控膜产生形变,由电容的计算公式C=ε×A /d(ε为电容中间绝缘介质的介电常数,A为电容的上下基板的重叠面积,d 为上下基板的间距),可知,间距d变化了,电容C也会相应地变化,而例如手机等的电子设备会将电容C的变化直接转换成电信号的变化,电信号的变化最终会传到对应的处理器中,由处理器定位到特定的位置并发出命令执行相应的功能。
目前,压力触控膜通常位于液晶(LCD)显示模组的背光模组(BLM)的下表面,与中框形成压力电容。图2示出了具有这种压力触控膜的LCD结构的示例,如图2所示,触摸屏210通过胶粘剂220(例如,透明光学胶OCA)与 LCD显示模组250粘合(这里,LCD显示模组250包括LCD模块230和背光模块(BLM)240,下面简称为LCM),压力触控膜260贴合在BLM240的下表面上,作为电容的上电极,与作为下电极的下部中框270形成压力电容。由于中框通常具有较多的凹凸不平的槽,因此在进行压力触控时会导致压力触控不均匀。此外,压力触控膜距离背光模组较近,容易导致压力触控膜发烫以致被损坏。
发明内容
发明人针对上述技术问题做出了本发明,本发明提供了一种压力触控式液晶显示装置及其制造方法,其能够形成良好的压力触控结构,提高压力触控式液晶显示装置的压感触控品质。
根据本发明的示例性实施方式的第一方面,一种压力触控式液晶显示装置,包括:触控面板,其用于接收触控操作;其与触控面板相对地设置在触控面板的一侧,其中,所述压力触控式液晶显示装置还包括形成在触控面板的与液晶显示模组相对的表面上的压力触控膜。
根据本发明的示例性实施方式的第二方面,所述触控面板通过设置在其外周缘的胶粘剂与所述液晶显示模组相互贴合,并在所述触控面板和所述液晶显示模组之间形成有空气层。
根据本发明的示例性实施方式的第三方面,其特征在于,所述液晶显示模组包括依次叠置的彩膜基板、液晶层、公共电压信号电极、阵列基板和背光模组,在所述压力触控膜和公共电压信号电极之间形成压感电容,所述压力触控膜和所述公共电压信号电极分别构成所述压感电容的两个电极。
根据本发明的示例性实施方式的第四方面,所述压力触控膜通过丝网印刷工艺形成在所述触控面板的所述表面上。
根据本发明的示例性实施方式的第五方面,所述压力触控膜为通过丝网印刷工艺形成在所述触控面板的所述表面上的氧化铟锡图案。
根据本发明的示例性实施方式的第六方面,所述液晶显示装置为扭曲向列型液晶显示装置、垂直配向型液晶显示装置或平面电场型液晶显示装置。
根据本发明的示例性实施方式的第七方面,一种压力触控式液晶显示装置的制造方法,其中,包括如下步骤:将压力触控膜形成在触控面板的一个表面上;使压力触控膜面对液晶显示模组,将触控面板与液晶显示模组贴合。
根据本发明的示例性实施方式的第八方面,所述液晶显示模组包括彩膜基板、液晶层、公共电压信号电极和阵列基板和背光模组,在所述压力触控膜和所述公共电压信号电极之间形成压感电容,所述压力触控膜和所述公共电压信号电极分别构成所述压感电容的两个电极。
根据本发明的示例性实施方式的第九方面,所述触控面板通过在其外周缘涂覆的胶粘剂与所述液晶显示模组相互贴合,并在所述触控面板和所述液晶显示模组之间形成有空气层。
根据本发明的示例性实施方式的第十方面,所述压力触控膜通过丝网印刷形成在所述触控面板的所述一个表面。
根据本发明的压力触控式液晶显示装置及其制造方法,有效地解决了目前压感触控结构中的压力触控膜易受背光热损害和压力触控不均匀等问题,良好地提高了压力触控的品质。
将在接下来的描述中部分阐述本发明另外的方面和/或优点,还有一部分通过描述将是清楚的,或者可以经过本发明的实施而得知。
附图说明
通过下面结合附图进行的对实施例的描述,本发明的上述和/或其它目的和优点将会变得更加清楚,其中:
图1示出了压力触控膜的结构示意图;
图2示出了现有技术的压力触控式液晶显示装置;
图3示出根据本发明的实施方式的压力触控式液晶显示装置的压力触控结构配置;以及
图4示出了触控面板和液晶显示模组的贴合过程的示意图。
具体实施方式
现将详细描述本发明的示例性实施例,所述实施例的示例在附图中示出,其中,相同的标号指示相同的部分。以下将通过参照附图来说明所述实施例,以便解释本发明。
图3示出根据本发明的实施方式的压力触控式液晶显示装置的压力触控结构配置。图4示出了触控面板和液晶显示模组的贴合过程的示意图。
如图3所示,根据本发明的压力触控式液晶显示装置可包括:触控面板 (touchpanel)320,其用于接收触控操作;压力触控膜(force film)330,其形成或设置在触控面板320的下表面(后表面)上;以及LCM 350,设置在压力触控膜320的下侧,通过胶粘剂(例如OCA胶或COR胶)340与压力触控膜 330结合。
如前面所提到的,LCM 350可以包括顺序叠置的彩膜基板(CF Glass)351、液晶层(未示出)、公共电压信号电极(VOCM ITO)353、阵列基板(薄膜晶体管阵列基板(简称为TFT基板))354以及背光模组(未示出)等。在触控面板320的外侧,还可设置玻璃基板310,用于保护触控面板320。在彩膜基板 351上形成有RGB(Red、Green、Blue)色组352。
图4示出了将触控面板320通过其外周缘的一圈胶粘剂340与LCM 350进行贴合的过程。在这样的贴合过程中,通常会在触控面板320与LCM 350之间留有很薄的一层空气层,如此便可利用这层空气层来形成压力触控所需的电容。压力触控膜330制作在触摸面板320的下表面上,可以作为电容的上电极,而 LCM 350中的VCOM ITO 353可作为电容的下电极,从而形成压力触控结构。
当手指等以不同大小的压力去触摸触控面板320时,压力触控膜330会发生不同程度的形变。根据形变程度不同,引起压感电容的间距大小的不同,进而引起压感电容量的变化。电容的变换转化成电信号的变化传递到触控IC的处理器中,处理器由此定位压力触摸的位置和信号,最终发出特定的指令,使电子装置的屏幕执行特定的动作。
在上面的实施例中,所采用的胶粘剂不限于OCA胶或COR胶,只要胶的粘合性强、满足触控面板与液晶显示模组粘合所需的粘合强度且不影响光学透过率,也可以使用其他类型的胶。
如图4所示,进一步详细说明本发明的压力触控式液晶显示装置的制造方法,首先通过丝网印刷等工艺将压力触控膜形成在OGS型触控面板的一个表面上;然后,使液晶显示模组面对所述压力触控膜,利用在触控面板的外周缘涂覆的例如透明光学胶等使触控面板与液晶显示模组彼此结合,于是在触控面板和液晶显示模组之间形成了空气层。
在操作本发明的压力触控式液晶显示装置时,当手指以不同大小的压力触摸液晶显示装置的屏幕时,随着压力的不同,导致压力触控膜的形变程度不同,引起上述压感电容的上下电极之间的大小的不同,进而使得压感电容的电容量发生变化。
上述电容的变化将被转化成电信号的变化,电信号的变化被传递到触控集成电路(IC)的处理中,处理器由此定位压力触摸的位置和信号,以此发出特定的指定,最终使得压力触控式液晶显示装置(例如手机等)执行特定的动作。
本发明的压力触控式液晶显示装置中的液晶显示屏(LCD)可以为扭曲向列型(简称TN型)液晶显示屏或垂直排列型(简称VA型)液晶显示屏。此外,上述液晶显示屏(LCD)也可以为平面转换(In-Plane Switching,简称为IPS) 型和边缘场切换(Fringe fieldswitching,简称为FFS)型等的液晶显示屏。
此外,本发明的压力触控式液晶显示装置中的压力触控结构还可应用于有机显示装置。也就是说,本发明的液晶显示装置可替换为有机显示装置。
在本发明的液晶显示装置中,由于压力触控膜设置在触控面板的下表面上,与背光模块隔开,从而避免了压力触控膜易受背光热损坏的问题。此外,由于压力触控电容形成在触控面板和LCD显示模块之间,而不是像现有技术那样利用中框作为电容的下电极,从而解决了触控不均匀的问题,良好提升了压力触控的品质。
此外,需要说明的是,本发明的压力触控结构配置可应用于中小型尺寸产品的触控技术中,从而良好提升压感触控品质,改善用户体验,其中中小型尺寸产品诸如为智能手机、平板电脑、穿戴式智能手表等。
本发明的以上实施例仅仅是示例性的,而本发明并不受限于此。本领域技术人员应该理解:在不脱离本发明的原理和精神的情况下,可对这些实施例进行改变,其中,本发明的范围在权利要求及其等同物中限定。

Claims (4)

1.一种压力触控式液晶显示装置,包括:
触控面板,其用于接收触控操作;
液晶显示模组,其与触控面板相对地设置在触控面板的一侧,
其特征在于,所述压力触控式液晶显示装置还包括形成在触控面板的与液晶显示模组相对的表面上的压力触控膜,所述触控面板通过设置在其外周缘的胶粘剂与所述液晶显示模组相互贴合,并在所述触控面板和所述液晶显示模组之间形成有空气层,所述液晶显示模组包括依次叠置的彩膜基板、液晶层、公共电压信号电极、阵列基板和背光模组,在所述压力触控膜和公共电压信号电极之间形成压感电容,所述压力触控膜和所述公共电压信号电极分别构成所述压感电容的两个电极。
2.根据权利要求1所述的压力触控式液晶显示装置,其特征在于,所述压力触控膜通过丝网印刷工艺形成在所述触控面板的所述表面上。
3.根据权利要求1所述的压力触控式液晶显示装置,其特征在于,所述压力触控膜为通过丝网印刷工艺形成在所述触控面板的所述表面上的氧化铟锡图案。
4.根据权利要求1至3中任一项所述的压力触控式液晶显示装置,其特征在于,所述液晶显示装置为扭曲向列型液晶显示装置、垂直配向型液晶显示装置或平面电场型液晶显示装置。
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