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CN106227376B - 一种压力触控结构 - Google Patents

一种压力触控结构 Download PDF

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CN106227376B
CN106227376B CN201610548514.XA CN201610548514A CN106227376B CN 106227376 B CN106227376 B CN 106227376B CN 201610548514 A CN201610548514 A CN 201610548514A CN 106227376 B CN106227376 B CN 106227376B
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pressure
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shielding metal
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CN106227376A (zh
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李曼
邢振周
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 US15/310,434 priority patent/US20180181228A1/en
Priority to PCT/CN2016/099073 priority patent/WO2018010292A1/zh
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Abstract

本发明提供了一种压力触控结构，所述压力触控结构包括触摸层、显示层以及压力感应层，所述触摸层、所述显示层和所述压力感应层依次层叠设置，所述压力触控结构还包括单独的屏蔽金属层。

Description

一种压力触控结构
技术领域
本发明涉及压力触控结构，尤其涉及一种能够屏蔽掉显示层在显示时沿垂直方向产生的电场的压力触控结构。
背景技术
随着智能手机、平板的发展，目前压力触控(Force touch)功能成为继多点触摸(Multi-Touch)之后另一项人机交流的技术，但是仍然存在许多亟待改进的问题，例如，压力触控结构可能容易受到移动装置其它信号的干扰，从而影响其对压感信号感测的准确度。
发明内容
为克服现有技术的不足，本发明提供一种压力触控结构。
根据本发明的一方面，提供一种压力触控结构，所述压力触控结构包括触摸层、显示层以及压力感应层，所述触摸层、所述显示层和所述压力感应层依次层叠设置，所述压力触控结构还包括单独的屏蔽金属层。
优选地，所述压力感应层包括绝缘电介质层和压力感应薄膜。
优选地，所述绝缘电介质层为空气间隙层。
优选地，所述显示层为液晶显示器面板。
优选地，当所述屏蔽金属层设置在所述液晶显示器面板的背光模组和所述空气间隙层之间时，所述屏蔽金属层为不透明的导电层。
优选地，所述不透明的导电层为以下金属中的一种或多种：钼、铝、铜、金和银。
优选地，当所述屏蔽金属层设置在所述液晶显示器面板的后玻璃板和所述液晶显示器面板的背光模组之间时，所述屏蔽金属层为透明的导电层。
优选地，所述透明的导电层为掺锡氧化铟薄膜。
优选地，所述显示层是基于平面转换显示模式的。
本发明不仅可以屏蔽掉显示层在显示时沿垂直方向的电场，还可同时提升触控装置显示和触控的精准度。
附图说明
图1示出了根据本发明的示例性实施例的显示层在显示时产生的电场的示意图；
图2示出了根据本发明的示例性实施例的压力触控结构的结构示意图；
图3示出了根据本发明的示例性实施例的设置屏蔽金属层的压力触控结构的结构示意图；
图4示出了根据本发明的示例性实施例的另一设置屏蔽金属层的压力触控结构的结构示意图。
具体实施方式
以下，参照附图来详细说明本发明的实施例。
图1示出了根据本发明的示例性实施例的显示层在显示时产生的电场103的示意图。
参照图1，图中所示为压力触控结构中的液晶显示器面板，当然，也可以是其它的显示面板(例如，OLED面板)。图中所示的点划线为液晶显示器面板在显示时在其前玻璃板(CF GLASS)101和后玻璃板(TFT GLASS)102之间所产生的电场103。这样的电场对于基于平面转换显示技术的液晶显示器而言通常会产生两个方向的电场，即，一个垂直于平行于面板方向的电场，一个平行于面板方向的电场，其中，垂直于平行于面板方向的电场对于液晶显示器在平面转换显示模式(例如，IPS平面转换模式或FFS平面转换模式)会产生信号干扰。
图2示出了根据本发明的示例性实施例的压力触控结构200的结构示意图。
参照图2，本发明的示例性实施例提供了一种压力触控结构200，从图中可以看出，触控装置200由触摸层210、显示层220以及压力感应层230三个部分依次叠加在一起构成。在本实施例中，触摸层210可由触摸屏(Touch Panel，简称TP)构成。显示层220可由液晶显示器(Liquid Crystal Display，简称LCD)面板构成，图中所示LCD面板除了包括前玻璃板(CF GLASS)、液晶层、VCOM电极104和后玻璃板(TFT GLASS)之外，其底部还包括一层背光模组(Backlight Module，简称BLM)105。压力感应层230可由一层绝缘电介质层106和压力感应薄膜(Force film)107构成，在一个可选的实施例中，绝缘电介质层可以是空气间隙层，除此之外，也可以采用其它合适的绝缘电介质层来实现。具体实施时，可采用框胶(OCA)将整个触控装置200贴合在手机等移动设备的中框(Metal Frame)108的上面，以实现压力触控的显示。
当触控装置200通过图中所示的IC和FPC上电时，触控装置200可在显示层220中的VCOM电极104和压力感应薄膜107之间形成压感电容C，其中，显示层220中的VCOM电极104为压感电容C的一个电极，压力感应薄膜107为压感电容C的另一个电极。
具体实施时，当用户手指以不同大小的压力去触摸触控装置200的触摸层210时，由于压力感应层230的压力感应薄膜的形变程度不同，引起压感电容C的间距大小的不同，进而引起压力电容量的变化，此时，可将电容的变化转化成电信号的变化传递到图中所示触控IC的处理器中，处理器由此定位用户手指的压力触摸的位置和信号，最终发出特定的指令，以便让手机等移动触摸设备执行特定的动作。
然而，图1所示电场103的垂直于平行于面板方向的电场会对本实施例中的压力触控结构200所感测到的压感信号产生干扰，进而对触控装置200的显示和触控的精准度造成不良影响。
为避免受到图1所示电场103的垂直于平行于面板方向的电场的影响，可考虑在触控装置200中屏蔽掉该垂直于平行于面板方向的电场。在一个可选的实施例中，可在显示层220和压力感应层230之间设置一屏蔽金属层，当触控装置200通过图中所示的IC和FPC上电时，该屏蔽金属层与压力感应层230的压力感应薄膜之间形成压力电容来感测手指在所述触摸层上的压力变化，同时，该屏蔽金属层还可屏蔽掉显示层220在显示时沿垂直方向产生的电场对压力感应层230所造成的信号干扰。
以下对在压力触控结构中设置屏蔽金属层的实施作了进一步的详细描述。
图3示出了根据本发明的示例性实施例的设置屏蔽金属层的压力触控结构300的结构示意图；
参照图3，本发明的示例性实施例提供了一种设置屏蔽金属层的压力触控结构300，从图中可以看出，触控装置300由触摸层310、显示层320、屏蔽金属层(Shielding ITO)330以及压力感应层340四个部分依次叠加在一起构成。其中，屏蔽金属层330设置在显示层320的背光模组105和压力感应层340的空气间隙层106之间。
当触控装置300通过图中所示的IC和FPC上电时，触控装置300可在屏蔽金属层330和压力感应薄膜107之间形成压感电容C，其中，屏蔽金属层330为压感电容C的一个电极，压力感应薄膜107为压感电容C的另一个电极。采用这样的实施方式，不仅可以屏蔽掉显示层320中的垂直方向的电场，还可同时提升触控装置显示和触控的精准度。
此外，为获得更好的显示和压力触控效果，在本实施例中，屏蔽金属层430可采用不透明的导电层，该不透明的导电层可以是钼、铝、铜、金和银等导电金属中一种或其组合。
图4示出了根据本发明的示例性实施例的另一设置屏蔽金属层的压力触控结构400的结构示意图。
参照图4，本发明的示例性实施例提供了一种设置屏蔽金属层的压力触控结构400，从图中可以看出，触控装置400由触摸层410、显示层420、屏蔽金属层430以及压力感应层440四个部分依次叠加在一起构成。其中，屏蔽金属层430设置在显示层420的后玻璃板102和显示层420的背光模组105之间。
类似地，当触控装置400通过图中所示的IC和FPC上电时，触控装置400可在屏蔽金属层430和压力感应薄膜107之间形成压感电容C，其中，屏蔽金属层430为压感电容C的一个电极，压力感应薄膜107为压感电容C的另一个电极。采用这样的实施方式，同样可以屏蔽掉显示层320中的垂直方向的电场，并提升触控装置显示和触控的精准度。
类似地，为获得更好的显示和压力触控效果，在本实施例中，屏蔽金属层430可采用透明的导电层，例如，掺锡氧化铟(ITO)薄膜。
从上述各个实施过程中可以看出，与现有的压力触控结构相比，改进后的整个压力触控结构进一步包括一设置在所述显示层和所述压力感应层之间的屏蔽金属层，这样在通电时，屏蔽金属层与压力感应层的压力感应薄膜之间形成压力电容，以感测手指在所述触摸层上的压力变化，并屏蔽掉所述显示层在显示时沿垂直方向产生的电场。
以上虽然已参照优选实施例为和描述了本发明，但本领域技术人员应该理解，在不脱离由权利要求限定的本发明的精神和范围的情况下，可以对这些实施例进行各种改变和变换。

Claims (9)

1.一种压力触控结构，包括：
触摸层；
显示层；以及
压力感应层，
所述触摸层、所述显示层和所述压力感应层依次层叠设置；
其特征在于，所述压力触控结构还包括单独的屏蔽金属层，所述屏蔽金属层设置于所述显示层和所述压力感应层之间，或者所述屏蔽金属层设置于所述显示层之中，其中，所述屏蔽金属层与所述压力感应层之间形成压力电容，以感测所述触摸层上的压力变化，并屏蔽掉所述显示层在显示时沿垂直方向产生的电场。
2.如权利要求1所述的压力触控结构，其特征在于，所述压力感应层包括绝缘电介质层和压力感应薄膜。
3.如权利要求2所述的压力触控结构，其特征在于，所述绝缘电介质层为空气间隙层。
4.如权利要求3所述的压力触控结构，其特征在于，所述显示层为液晶显示器面板。
5.如权利要求4所述的压力触控结构，其特征在于，当所述屏蔽金属层设置在所述液晶显示器面板的背光模组和所述空气间隙层之间时，所述屏蔽金属层为不透明的导电层。
6.如权利要求5所述的压力触控结构，其特征在于，所述不透明的导电层为以下金属中的一种或多种：钼、铝、铜、金和银。
7.如权利要求4所述的压力触控结构，其特征在于，当所述屏蔽金属层设置在所述液晶显示器面板的后玻璃板和所述液晶显示器面板的背光模组之间时，所述屏蔽金属层为透明的导电层。
8.如权利要求7所述的压力触控结构，其特征在于，所述透明的导电层为掺锡氧化铟薄膜。
9.如权利要求1-8任一项所述的压力触控结构，其特征在于，所述显示层是基于平面转换显示模式的。
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