WO2018010292A1 - 一种压力触控结构 - Google Patents

一种压力触控结构 Download PDF

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Publication number
WO2018010292A1
WO2018010292A1 PCT/CN2016/099073 CN2016099073W WO2018010292A1 WO 2018010292 A1 WO2018010292 A1 WO 2018010292A1 CN 2016099073 W CN2016099073 W CN 2016099073W WO 2018010292 A1 WO2018010292 A1 WO 2018010292A1
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WIPO (PCT)
Prior art keywords
layer
pressure
touch structure
display
touch
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Ceased
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PCT/CN2016/099073
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English (en)
French (fr)
Inventor
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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Application filed by Shenzhen China Star Optoelectronics Technology Co Ltd, Wuhan China Star Optoelectronics Technology Co Ltd filed Critical Shenzhen China Star Optoelectronics Technology Co Ltd
Priority to US15/310,434 priority Critical patent/US20180181228A1/en
Publication of WO2018010292A1 publication Critical patent/WO2018010292A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input 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
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412—Digitisers structurally integrated in a display
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input 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
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0414—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using force sensing means to determine a position
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices 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
    • G02F1/01—Devices 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 
    • G02F1/13—Devices 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
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/13338—Input devices, e.g. touch panels
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices 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
    • G02F1/01—Devices 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 
    • G02F1/13—Devices 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
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133509—Filters, e.g. light shielding masks
    • G02F1/133512—Light shielding layers, e.g. black matrix
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input 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
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input 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
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0443—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a single layer of sensing electrodes
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices 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
    • G02F1/01—Devices 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 
    • G02F1/13—Devices 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
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1343—Electrodes
    • G02F1/134309—Electrodes characterised by their geometrical arrangement
    • G02F1/134363—Electrodes characterised by their geometrical arrangement for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04104—Multi-touch detection in digitiser, i.e. details about the simultaneous detection of a plurality of touching locations, e.g. multiple fingers or pen and finger
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04105—Pressure sensors for measuring the pressure or force exerted on the touch surface without providing the touch position
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04107—Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds

Definitions

  • the present invention relates to a pressure touch structure, and more particularly to a pressure touch structure capable of shielding an electric field generated by a display layer in a vertical direction during display.
  • the touch structure may be susceptible to interference from other signals of the mobile device, thereby affecting the accuracy of sensing the pressure sensitive signal.
  • the present invention provides a pressure touch structure.
  • a pressure touch structure includes a touch layer, a display layer, and a pressure sensing layer, and the touch layer, the display layer, and the pressure sensing layer are sequentially stacked.
  • the pressure touch structure further includes a separate shielding metal layer.
  • the pressure sensing layer comprises an insulating dielectric layer and a pressure sensing film.
  • the insulating dielectric layer is an air gap layer.
  • the display layer is a liquid crystal display panel.
  • the shielding metal layer when the shielding metal layer is disposed between the backlight module of the liquid crystal display panel and the air gap layer, the shielding metal layer is an opaque conductive layer.
  • the opaque conductive layer is one or more of the following metals: molybdenum, aluminum, copper, gold, and silver.
  • the shielding metal layer when the shielding metal layer is disposed on the rear glass plate of the liquid crystal display panel and When the backlight module of the liquid crystal display panel is between, the shielding metal layer is a transparent conductive layer.
  • the transparent conductive layer is a tin-doped indium oxide film.
  • the display layer is based on a planar conversion display mode.
  • the invention can not only shield the electric field in the vertical direction of the display layer during display, but also improve the accuracy of the display and touch of the touch device.
  • FIG. 1 shows a schematic diagram of an electric field generated by a display layer when displayed, in accordance with an exemplary embodiment of the present invention
  • FIG. 2 is a schematic structural view of a pressure touch structure according to an exemplary embodiment of the present invention.
  • FIG. 3 is a schematic structural view of a pressure touch structure in which a shielding metal layer is provided, according to an exemplary embodiment of the present invention
  • FIG. 4 is a block diagram showing another structure of a pressure touch structure in which a shielding metal layer is provided, according to an exemplary embodiment of the present invention.
  • FIG. 1 shows a schematic diagram of an electric field 103 generated by a display layer when displayed, in accordance with an exemplary embodiment of the present invention.
  • the liquid crystal display panel in the pressure touch structure is shown.
  • other display panels for example, OLED panels
  • the dotted line shown in the drawing is an electric field 103 generated between the front glass plate (CF GLASS) 101 and the rear glass plate (TFT GLASS) 102 when the liquid crystal display panel is displayed.
  • Such an electric field generally produces an electric field in two directions for a liquid crystal display based on a planar conversion display technology, that is, an electric field perpendicular to a direction parallel to the panel, and an electric field parallel to the panel direction, wherein is perpendicular to the panel.
  • the electric field in the direction causes signal interference to the liquid crystal display in a planar conversion display mode (for example, an IPS plane conversion mode or an FFS plane conversion mode).
  • FIG. 2 shows a schematic structural view of a pressure touch structure 200 according to an exemplary embodiment of the present invention.
  • an exemplary embodiment of the present invention provides a pressure touch structure 200.
  • the touch device 200 is sequentially stacked by the touch layer 210, the display layer 220, and the pressure sensing layer 230.
  • the touch layer 210 may be configured by a touch panel (TP).
  • the display layer 220 may be composed of a liquid crystal display (LCD) panel.
  • the LCD panel shown in the figure includes a front glass plate (CF GLASS), a liquid crystal layer, a VCOM electrode 104, and a rear glass plate (TFT GLASS).
  • the bottom also includes a Backlight Module (BLM) 105.
  • BBM Backlight Module
  • the pressure sensing layer 230 may be composed of a layer of insulating dielectric layer 106 and a pressure sensing film 107.
  • the insulating dielectric layer may be an air gap layer, and other suitable layers may be used.
  • the insulating dielectric layer is implemented.
  • the entire touch device 200 can be attached to the top of the metal frame 108 of the mobile device such as a mobile phone by using an OCC to realize the display of the pressure touch.
  • the touch device 200 When the touch device 200 is powered on by the IC and the FPC shown in the figure, the touch device 200 can form a pressure sensitive capacitor C between the VCOM electrode 104 and the pressure sensing film 107 in the display layer 220, wherein the display layer 220
  • the VCOM electrode 104 is one electrode of the pressure sensitive capacitor C
  • the pressure sensing film 107 is the other electrode of the pressure sensitive capacitor C.
  • the degree of deformation of the pressure sensing film of the pressure sensing layer 230 is different, causing a difference in the pitch of the pressure sensitive capacitor C.
  • a change in the pressure capacitance is caused.
  • the change of the capacitance can be converted into a change of the electrical signal and transmitted to the processor of the touch IC shown in the figure, and the processor thereby locates the position and signal of the pressure touch of the user's finger.
  • specific instructions are issued to allow mobile touch devices such as mobile phones to perform specific actions.
  • the electric field of the electric field 103 shown in FIG. 1 that is perpendicular to the direction of the panel interferes with the pressure sensitive signal sensed by the pressure touch structure 200 in the embodiment, and thus displays and touches the touch device 200. Accuracy has an adverse effect.
  • a shielding metal layer may be disposed between the display layer 220 and the pressure sensing layer 230.
  • a pressure capacitance is formed between the shielding metal layer and the pressure sensing film of the pressure sensing layer 230 to sense the pressure change of the finger on the touch layer, and
  • the shielding metal layer can also shield the signal interference caused by the electric field generated by the display layer 220 in the vertical direction when displayed on the pressure sensing layer 230.
  • FIG. 3 illustrates a schematic structural view of a pressure touch structure 300 in which a shielding metal layer is disposed, according to an exemplary embodiment of the present invention
  • an exemplary embodiment of the present invention provides a pressure touch structure 300 with a shielding metal layer.
  • the touch device 300 is composed of a touch layer 310, a display layer 320, and a shielding metal layer.
  • Four parts of the Shielding ITO) 330 and the pressure sensing layer 340 are sequentially stacked.
  • the shielding metal layer 330 is disposed between the backlight module 105 of the display layer 320 and the air gap layer 106 of the pressure sensing layer 340.
  • the touch device 300 When the touch device 300 is powered by the IC and the FPC shown in the figure, the touch device 300 can form a pressure sensitive capacitor C between the shielding metal layer 330 and the pressure sensing film 107, wherein the shielding metal layer 330 is pressure sensitive.
  • One electrode of the capacitor C, the pressure sensing film 107 is the other electrode of the pressure sensitive capacitor C.
  • the shielding metal layer 430 may adopt an opaque conductive layer, and the opaque conductive layer may be a conductive metal such as molybdenum, aluminum, copper, gold or silver. One or a combination thereof.
  • FIG. 4 shows a schematic structural view of another pressure touch structure 400 provided with a shielding metal layer according to an exemplary embodiment of the present invention.
  • an exemplary embodiment of the present invention provides a pressure touch structure 400 with a shielding metal layer.
  • the touch device 400 is composed of a touch layer 410 , a display layer 420 , and a shielding metal layer 430 . And four parts of the pressure sensing layer 440 are sequentially stacked.
  • the shielding metal layer 430 is disposed between the rear glass plate 102 of the display layer 420 and the backlight module 105 of the display layer 420.
  • the touch device 400 when the touch device 400 is powered by the IC and the FPC shown in the figure, the touch device 400 A pressure sensitive capacitor C can be formed between the shield metal layer 430 and the pressure sensitive film 107.
  • the shield metal layer 430 is one electrode of the pressure sensitive capacitor C
  • the pressure sensing film 107 is the other electrode of the pressure sensitive capacitor C.
  • the shielding metal layer 430 may employ a transparent conductive layer, for example, a tin-doped indium oxide (ITO) film.
  • ITO tin-doped indium oxide
  • the improved entire pressure touch structure further includes a shield metal layer disposed between the display layer and the pressure sensing layer as compared with the existing pressure touch structure. So that when the power is applied, a pressure capacitance is formed between the shielding metal layer and the pressure sensing film of the pressure sensing layer to sense the pressure change of the finger on the touch layer, and the display layer is shielded from the vertical direction when displayed. The electric field produced.

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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 (10)

  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；
    其中，所述压力触控结构还包括单独的屏蔽金属层。
  2. 如权利要求1所述的压力触控结构，其中，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，其中，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，其中，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，其中，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，其中，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，其中，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，其中，所述透明的导电层为掺锡氧化铟薄膜。
  9. 如权利要求1所述的压力触控结构，其中，所述显示层是基于平面转换显示模式的。
  10. 如权利要求4所述的压力触控结构，其中，所述显示层是基于平面转换显示模式的。
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