WO2017190383A1 - 具有压力感应触控功能的外挂式触摸显示装置 - Google Patents

具有压力感应触控功能的外挂式触摸显示装置 Download PDF

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Publication number
WO2017190383A1
WO2017190383A1 PCT/CN2016/083074 CN2016083074W WO2017190383A1 WO 2017190383 A1 WO2017190383 A1 WO 2017190383A1 CN 2016083074 W CN2016083074 W CN 2016083074W WO 2017190383 A1 WO2017190383 A1 WO 2017190383A1
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Prior art keywords
touch
capacitive
sensing electrode
capacitive sensing
display device
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PCT/CN2016/083074
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English (en)
French (fr)
Inventor
曹昌
蔡育徵
张洲
马长文
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武汉华星光电技术有限公司
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Priority to US15/301,348 priority Critical patent/US20180088700A1/en
Publication of WO2017190383A1 publication Critical patent/WO2017190383A1/zh

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR 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
    • G02F1/133514—Colour filters
    • 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
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    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133528—Polarisers
    • 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
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR 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
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    • G06F—ELECTRIC DIGITAL DATA PROCESSING
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    • 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; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
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    • 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
    • G06F3/0445—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
    • 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
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G02F1/133314—Back frames
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR 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; CALCULATING OR 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
    • G06F2203/04112—Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
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    • 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
    • G06F3/0447—Position sensing using the local deformation of sensor cells

Definitions

  • the present invention relates to the field of display technologies, and more particularly to an external touch display device having a pressure sensing touch function.
  • touch screens are particularly important.
  • touch sensing technologies mainly capacitive touch screens, which mainly determine the positional information of the finger touches (by obtaining the capacitance changes of the electrodes in the X-axis direction and the Y-axis direction respectively) to accurately calculate Touch the location of the point).
  • capacitive touch screens which mainly determine the positional information of the finger touches (by obtaining the capacitance changes of the electrodes in the X-axis direction and the Y-axis direction respectively) to accurately calculate Touch the location of the point).
  • the ideal touch screen not only needs to be able to sense the plane position information of the touch, but also needs to be able to sense the vertical pressure of the touch (Z-axis direction), thereby realizing the form of traditional interpersonal interaction from two.
  • the dimensional mode is changed to a three-dimensional mode.
  • touch display devices with pressure-sensitive touch functions are mostly implemented by adding a plurality of pressure sensors to a display (such as a liquid crystal display).
  • a display such as a liquid crystal display
  • This design requires a large change to the structural design of the display itself. The structure is more complicated and the process is more difficult.
  • Pressure sensors have limited spatial resolution, which can affect the display quality of the display when multiple pressure sensors are added.
  • the present invention provides an external touch display device with a pressure sensing touch function, which realizes a pressure sensing touch function in a touch display device with a simple structure, thereby reducing cost.
  • An external touch display device with a pressure-sensitive touch function includes a capacitive touch screen and a display module disposed in a stack, the capacitive touch screen is for sensing a touch signal, and the display module includes a display panel that is oppositely disposed And a backlight module and a middle frame for supporting the display panel and the backlight module, wherein the display panel is provided with a plurality of conductive structural layers, wherein one of the plurality of conductive structural layers is used as a first capacitive sensing electrode, the side of the middle frame facing the backlight module further a second capacitive sensing electrode is disposed, the second capacitive sensing electrode and the backlight module have a gap therebetween, and the first capacitive sensing electrode and the second capacitive sensing electrode form a capacitive sensing mechanism for sensing and applying to the The pressure signal on the capacitive touch screen.
  • the display panel includes an array substrate, a common electrode layer is disposed in the array substrate, and the common electrode layer is used as the first capacitive sensing electrode; the public time is displayed within a frame time The electrode layer is used to time-transfer the common voltage signal and the pressure sensing signal.
  • the display panel includes an array substrate.
  • the array substrate is disposed on a side of the backlight module with a first polarizer.
  • the first polarizer is formed of a conductive material, and the first polarizer is used.
  • the display panel includes an array substrate, and the array substrate includes a first polarizer and a first glass substrate in a direction gradually away from the backlight module, and the first polarizer is formed by an insulating material.
  • a first conductive plane is disposed between the first polarizer and the first glass substrate, and the first conductive plane is used as the first capacitive sensing electrode.
  • the material of the first conductive plane is ITO.
  • the material of the second capacitive sensing electrode is ITO.
  • the display panel includes an array substrate and a filter substrate disposed opposite to each other and a liquid crystal layer between the array substrate and the filter substrate.
  • the capacitive touch screen includes a touch driving electrode and a touch sensing electrode disposed in different layers, and the touch driving electrodes and the touch sensing electrodes are used to sense a touch signal applied on the capacitive touch screen.
  • the invention provides an external touch display device with a pressure sensing touch function, which comprises a capacitive touch screen and a display module arranged in a stack, the capacitive touch screen comprising a touch layer for sensing a touch signal arranged in different layers.
  • the display module includes a display panel, wherein the capacitive touch screen and the display module have a gap, the display panel includes a filter substrate, and the filter substrate is gradually separated from the
  • the direction of the capacitive touch screen includes a second polarizer and a second glass substrate, the second polarizer is formed of an insulating material, and a second conductive plane is disposed between the second polarizer and the second glass substrate.
  • the second conductive plane and the touch drive electrode form a capacitive sensing mechanism for sensing a pressure signal applied to the capacitive touch screen.
  • the material of the second conductive plane is ITO.
  • the external touch with the pressure sensing touch function provided by the embodiment of the present invention Touching the display device, on the basis of the existing two-dimensional touch function external touch display device, by providing a second capacitive sensing electrode between the middle frame and the backlight module, and using a conductive structure layer in the display panel
  • the first capacitive sensing electrode As the first capacitive sensing electrode, the first capacitive sensing electrode and the second capacitive sensing electrode form a capacitive sensing mechanism for sensing a pressure signal applied to the capacitive touch screen, thereby realizing a three-dimensional touch function, and the structure is simple and easy Realized, low production costs.
  • the material of the added second capacitive sensing electrode is transparent conductive ITO, and is disposed on the back surface of the backlight module, and realizes the three-dimensional touch function without affecting the display quality of the existing liquid crystal display device.
  • Embodiment 1 is a schematic structural diagram of an external touch display device in Embodiment 1 of the present invention.
  • FIG. 2 is a schematic structural diagram of an external touch display device according to Embodiment 2 of the present invention.
  • Embodiment 3 is a schematic structural diagram of an external touch display device in Embodiment 3 of the present invention.
  • Embodiment 4 is a schematic structural view of an external touch display device in Embodiment 4 of the present invention.
  • the embodiment provides an external touch display device with a pressure sensing touch function.
  • the external touch display device includes a capacitive touch screen 1 and a display module 2 arranged in a stack.
  • the capacitive touch screen 1 includes a touch driving electrode 11 and a touch sensing electrode 12 disposed in different layers, and the touch driving electrode 11 and the touch sensing electrode 12 are used to sense a touch signal applied to the capacitive touch screen 1 .
  • the display module 2 includes a display panel 2a and a backlight module 2b disposed opposite to each other, and a middle frame 2c for supporting the display panel 2a and the backlight module 2b.
  • the backlight module 2b provides display light.
  • the display panel 2a is sourced to cause the display panel 2a to display an image.
  • the display panel 2a includes an array substrate 21 and a filter substrate 22 disposed opposite to each other, and a liquid crystal layer 23 between the array substrate 21 and the filter substrate 22.
  • the array substrate 21 includes a first glass substrate 211 , and the first glass substrate 211 is sequentially disposed with a pixel electrode layer 212 and a common electrode layer 213 adjacent to one side of the liquid crystal layer 23 .
  • a first polarizer 214 is disposed on a side of the first glass substrate 211 adjacent to the backlight module 2b; wherein the pixel electrode layer 212 and the common electrode layer 213 are insulated from each other (the insulating structure is not shown in the drawing) a conductive structure layer, the pixel electrode layer 212 comprising a plurality of pixel electrodes arranged in an array.
  • the filter substrate 22 includes a second glass substrate 221 and a color photoresist layer 222 disposed on a side of the second glass substrate 222 adjacent to the liquid crystal layer 23, wherein
  • the color photoresist layer 222 includes a red photoresist R, a green photoresist G, and a blue photoresist B.
  • the second glass substrate 221 is disposed on a side of the capacitive touch screen 1 with a second polarizer 223. Further, the array substrate 21 is further provided with a data line, a scan line, a thin film transistor array and the like, and the filter substrate 22 is further provided with a black matrix or the like.
  • a second capacitive sensing electrode 3 , the second capacitive sensing electrode 3 and the backlight module 2 b are further disposed on a side of the middle frame 2 c facing the backlight module 2 b .
  • the common electrode layer 213 is used as the first capacitive sensing electrode 4a, and the first capacitive sensing electrode 4a and the second capacitive sensing electrode 3 constitute a capacitive sensing mechanism C1.
  • a pressure signal applied to the capacitive touch screen 1 of the touch display device is sensed.
  • the common electrode layer 213 is multiplexed into the first capacitive sensing electrode 4a, the common electrode layer 213 is used to time-transfer the common voltage signal and the pressure sensing signal in the display time of one frame.
  • the capacitive touch screen 1 is connected with a touch control chip (not shown in the drawing), the display panel 2a is connected with a panel driving chip (not shown in the drawing), and the capacitive sensing mechanism C1 is connected with pressure sensing control.
  • the chip (not shown in the drawing); the touch control chip, the panel driving chip, and the pressure sensing control chip can be integrated into one printed circuit board and connected to corresponding components through a flexible wiring board (FPC).
  • the touch control chip drives the touch drive electrodes 11 and the touch sense electrodes 12 of the capacitive touch screen 1 to sense the position of the touch.
  • the common electrode layer 213 (first capacitive sensing electrode 4a) transmits a common voltage signal, and the display panel 2a displays an image.
  • the common electrode layer 213 (the first capacitive sensing electrode 4a) transmits a pressure sensing signal, and when the touched finger presses the capacitive touch screen 1, the display panel 2a is deformed, and the first capacitive sensing electrode 4a and the second The distance between the capacitance sensing electrodes 3 is reduced, and the capacitance of the first capacitive sensing electrode 4a and the second capacitive sensing electrode 3 constituting the capacitance sensing mechanism C1 changes accordingly, by establishing a mutual relationship between the capacitance change value and the pressure value.
  • the pressure sensing control chip obtains the pressure change signal after obtaining the capacitance change signal, and realizes the pressure sensing touch function, thereby enabling the touch display device to realize the three-dimensional touch function.
  • the touch display device provided by the above embodiment is configured to provide a second capacitive sensing electrode, a second capacitive sensing electrode and a display between the middle frame and the backlight module, based on the external two-dimensional touch function external touch display device.
  • the common electrode layer in the panel constitutes a capacitive sensing mechanism, which can sense the pressure signal applied to the display panel, thereby realizing a three-dimensional touch function, which is simple in structure, easy to implement, and low in production cost.
  • the added second capacitive sensing electrode is disposed on the back surface of the backlight module, and realizes the three-dimensional touch function without affecting the display quality of the existing display device.
  • the first embodiment is different from the first embodiment.
  • the first polarizer 214 is formed by a conductive material, and the first polarizer 214 is used as the first.
  • the capacitive sensing electrode 4b, the first capacitive sensing electrode 4b and the second capacitive sensing electrode 3 form a capacitive sensing mechanism C2, and the capacitive sensing mechanism C2 is connected with a pressure sensing control chip (not shown) for inductive application. a pressure signal on the touch display device.
  • the touch driving chip 11 and the touch sensing electrode 12 of the capacitive touch panel 1 are driven by the touch control chip to sense the position of the touch.
  • the first capacitive sensing electrode 4b and the second capacitive sensing electrode 3 are driven by the pressure sensing control chip.
  • the pressure sensing control chip acquires the capacitance change signal. The pressure information of the pressing can be obtained, and the pressure sensing touch function is realized, so that the touch display device realizes the three-dimensional touch function.
  • the first embodiment is different from the first embodiment.
  • a first conductive plane 215 is disposed between the first polarizer 214 and the first glass substrate 211, and the first conductive layer is disposed. Plane 215 is used as the first capacitive sensing electrode 4c, the first capacitive sensing electrode 4c and the second capacitive sensing electrode 3 constitute a capacitive sensing mechanism C3, and the capacitive sensing mechanism C3 is connected with a pressure sensing control chip (Fig. Not shown) for sensing a pressure signal applied to the touch display device.
  • the first polarizer 214 is formed by an insulating material, and the material of the first conductive plane 215 is indium tin oxide (ITO).
  • the touch driving chip 11 and the touch sensing electrode 12 of the capacitive touch panel 1 are driven by the touch control chip to sense the position of the touch.
  • the first capacitive sensing electrode 4c and the second capacitive sensing electrode 3 are driven by the pressure sensing control chip.
  • the pressure sensing control chip acquires the capacitance change signal. The pressure information of the pressing can be obtained, and the pressure sensing touch function is realized, so that the touch display device realizes the three-dimensional touch function.
  • the difference between the embodiment and the embodiment 1 is that, as shown in FIG. 4, in the embodiment, the touch driving electrode 11 of the capacitive touch screen 1 is multiplexed into the second capacitive sensing electrode 3a. Therefore, the middle frame 2c The second capacitive sensing electrode is no longer provided.
  • a gap H2 is disposed between the capacitive touch panel 1 and the display panel 2a in the display module.
  • a second conductive layer is disposed between the second polarizer 223 and the second glass substrate 221 a plane 224, the second conductive plane 224 is used as the first capacitive sensing electrode 4d, and the first capacitive sensing electrode 4d and the second capacitive sensing electrode 3a constitute a capacitive sensing mechanism C4, the capacitive sensing mechanism C4
  • a pressure sensing control chip (not shown) is coupled for sensing a pressure signal applied to the touch display device.
  • the second polarizer 223 is formed by an insulating material
  • the material of the second conductive plane 224 is indium tin oxide (ITO)
  • the gap H2 may be left blank (in which air) or filled with OCA optics. gum.
  • the touch timing is divided into two parts.
  • the touch control chip drives the touch driving electrode 11 (the second capacitive sensing electrode 3a) of the capacitive touch screen 1 and the touch sensing electrode. 12 inducing the position of the touch;
  • the first capacitive sensing electrode 4d and the touch driving electrode 11 (the second capacitive sensing electrode 3a) are driven by the pressure sensing control chip, and when the touched finger presses the capacitive touch screen 1,
  • the distance between the first capacitive sensing electrode 4d and the second capacitive sensing electrode 3a becomes smaller, and the capacitance of the first capacitive sensing electrode 4d and the second capacitive sensing electrode 3a constituting the capacitive sensing mechanism C4 changes accordingly.
  • the external touch display device with the pressure sensing touch function is provided with a first capacitive sensing electrode and a second capacitive sensing electrode to form a capacitive sensing mechanism, by acquiring a capacitance change signal.
  • the pressure information of the pressing is obtained, and the pressure sensing touch function is realized, so that the touch display device realizes the three-dimensional touch function.
  • the three-dimensional touch function is realized, and the structure is simple and easy to implement, and the production cost is low.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Human Computer Interaction (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Mathematical Physics (AREA)
  • Liquid Crystal (AREA)
  • Position Input By Displaying (AREA)

Abstract

本发明公开了一种具有压力感应触控功能的外挂式触摸显示装置，其包括呈叠层设置的电容触摸屏和显示模组，所述电容触摸屏用于感应触摸信号，所述显示模组包括相对设置的显示面板和背光模组以及中框，所述显示面板中设置有多个导电结构层，其中，所述多个导电结构层的其中之一被用于作为第一电容感应电极，所述中框的朝向所述背光模组的一侧还设置有第二电容感应电极，所述第二电容感应电极与所述背光模组之间具有间隙，所述第一电容感应电极与第二电容感应电极构成电容感应机构，用于感应施加于所述电容触摸屏上的压力信号。本发明提供的外挂式触摸显示装置，使用简单的结构在触摸显示装置中实现压力感应触控功能，降低成本。

Description

具有压力感应触控功能的外挂式触摸显示装置 技术领域
本发明涉及显示技术领域，尤其是一种具有压力感应触控功能的外挂式触摸显示装置。
背景技术
随着移动式电子产品设备技术的发展和进步，触摸屏的使用显得尤为重要。目前有许多不同的触控感应技术，主要为电容式触摸屏，其主要是通过识别手指触摸的平面位置信息(通过获得该点分别在X轴方向电极和Y轴方向电极的电容变化，以精确计算触摸点的位置)。随着人们对触摸技术的要求不断提高，理想中的触摸屏不仅需要能够感应触摸的平面位置信息，还需要能够感应到触摸的垂直压力(Z轴方向)，从而实现传统的人际交互的形式从二维模式转变为三维模式。
但目前，具有压力感应触控功能的触摸显示装置大多是在显示器(如液晶显示器)中额外增加多个压力传感器来实现，这种设计，需要对显示器本身的结构设计做出较大的改动，且结构比较复杂，工艺难度较大。压力传感器具有有限的空间分辨率，当增加多个压力传感器时，会影响显示器的显示品质。
发明内容
有鉴于此，本发明提供了一种具有压力感应触控功能的外挂式触摸显示装置，使用简单的结构在触摸显示装置中实现压力感应触控功能，降低成本。
为了达到上述目的，本发明采用了如下技术方案：
一种具有压力感应触控功能的外挂式触摸显示装置，其包括呈叠层设置的电容触摸屏和显示模组，所述电容触摸屏用于感应触摸信号，所述显示模组包括相对设置的显示面板和背光模组以及用于支撑所述显示面板和背光模组的中框，所述显示面板中设置有多个导电结构层，其中，所述多个导电结构层的其中之一被用于作为第一电容感应电极，所述中框的朝向所述背光模组的一侧还 设置有第二电容感应电极，所述第二电容感应电极与所述背光模组之间具有间隙，所述第一电容感应电极与第二电容感应电极构成电容感应机构，用于感应施加于所述电容触摸屏上的压力信号。
其中，所述显示面板包括阵列基板，所述阵列基板中设置有公共电极层，所述公共电极层被用于作为所述第一电容感应电极；在一帧画面的显示时间内，所述公共电极层用于分时地传递公共电压信号和压力感应信号。
其中，所述显示面板包括阵列基板，所述阵列基板朝向所述背光模组的一侧设置有第一偏光片，所述第一偏光片由导电材料制备形成，所述第一偏光片被用于作为所述第一电容感应电极。
其中，所述显示面板包括阵列基板，所述阵列基板按照逐渐远离所述背光模组的方向依次包括第一偏光片和第一玻璃基板，所述第一偏光片由绝缘材料制备形成，所述第一偏光片和第一玻璃基板之间设置有一第一导电平面，所述第一导电平面被用于作为所述第一电容感应电极。
其中，所述第一导电平面的材料为ITO。
其中，所述第二电容感应电极的材料为ITO。
其中，所述显示面板包括相对设置的阵列基板和滤光基板以及位于所述阵列基板和滤光基板之间的液晶层。
其中，所述电容触摸屏包括异层设置的触摸驱动电极和触摸感应电极，所述触摸驱动电极和触摸感应电极用于感应施加于电容触摸屏上的触摸信号。
本发明提供的另外一种具有压力感应触控功能的外挂式触摸显示装置，其包括呈叠层设置的电容触摸屏和显示模组，所述电容触摸屏包括异层设置的用于感应触摸信号的触摸驱动电极和触摸感应电极，所述显示模组包括显示面板，其中，所述电容触摸屏和显示模组之间具有间隙，所述显示面板包括滤光基板，所述滤光基板按照逐渐远离所述电容触摸屏的方向依次包括第二偏光片和第二玻璃基板，所述第二偏光片由绝缘材料制备形成，所述第二偏光片和第二玻璃基板之间设置有一第二导电平面，所述第二导电平面与所述触摸驱动电极构成电容感应机构，用于感应施加于所述电容触摸屏上的压力信号。
其中，所述第二导电平面的材料为ITO。
相比于现有技术，本发明实施例提供的具有压力感应触控功能的外挂式触 摸显示装置，在现有二维触摸功能的外挂式触摸显示装置的基础上，通过在中框和背光模组之间设置第二电容感应电极，并且将显示面板中的一个导电结构层用于作为第一电容感应电极，第一电容感应电极与第二电容感应电极构成电容感应机构，用于感应施加于所述电容触摸屏上的压力信号，从而实现了三维触摸功能，并且其结构简单，易于实现，生产成本低。进一步地，增加的第二电容感应电极的材料为透明导电的ITO，并且是设置在背光模组的背面，在实现三维触摸功能的同时不影响现有液晶显示装置的显示品质。
附图说明
图1是本发明实施例1中的外挂式触摸显示装置的结构示意图；
图2是本发明实施例2中的外挂式触摸显示装置的结构示意图；
图3是本发明实施例3中的外挂式触摸显示装置的结构示意图；
图4是本发明实施例4中的外挂式触摸显示装置的结构示意图。
具体实施方式
下面将结合附图以及具体实施例，对本发明实施例中的技术方案进行详细地描述，显然，所描述的实施例仅仅是本发明一部分实例，而不是全部实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动的前提下所获得的所有其他实施例，都属于本发明保护范围。
在此，还需要说明的是，为了避免因不必要的细节而模糊了本发明，在附图中仅仅示出了与根据本发明的方案密切相关的结构和/或处理步骤，而省略了与本发明关系不大的其他细节。
实施例1
本实施例提供了一种具有压力感应触控功能的外挂式触摸显示装置，如图1所示，所述外挂式触摸显示装置包括呈叠层设置的电容触摸屏1和显示模组2。
其中，所述电容触摸屏1包括异层设置的触摸驱动电极11和触摸感应电极12，所述触摸驱动电极11和触摸感应电极12用于感应施加于电容触摸屏1上的触摸信号。
其中，所述显示模组2包括相对设置的显示面板2a和背光模组2b以及用于支撑所述显示面板2a和背光模组2b的中框2c，所述背光模组2b提供显示光 源给所述显示面板2a，以使所述显示面板2a显示影像。
其中，所述显示面板2a包括相对设置的阵列基板21和滤光基板22以及位于所述阵列基板21和滤光基板22之间的液晶层23。具体地，参阅图1，所述阵列基板21包括第一玻璃基板211，所述第一玻璃基板211靠近于所述液晶层23的一侧依次设置有像素电极层212和公共电极层213，所述第一玻璃基板211靠近于所述背光模组2b的一侧设置有第一偏光片214；其中，所述像素电极层212和公共电极层213为相互绝缘(附图中未示出绝缘结构)的导电结构层，所述像素电极层212包括多个阵列设置的像素电极。所述滤光基板22包括第二玻璃基板221和彩色光阻层222，所述彩色光阻层222设置于所述第二玻璃基板222靠近于所述液晶层23的一侧，其中，所述彩色光阻层222包括红色光阻R、绿色光阻G和蓝色光阻B；所述第二玻璃基板221靠近于所述电容触摸屏1的一侧设置有第二偏光片223。进一步地，所述阵列基板21中还设置有数据线、扫描线以及薄膜晶体管阵列等，所述滤光基板22中还设置有黑色矩阵等。这些结构与本发明所要改进的结构关联性不是很密切，因此附图中没有示出，在此也不再详细说明。
其中，如图1所示，在所述中框2c的朝向所述背光模组2b的一侧还设置有第二电容感应电极3，所述第二电容感应电极3与所述背光模组2b之间具有间隙H1，间隙H1应当要保证触摸显示装置被按压时具有足够的形变空间；其中，第二电容感应电极3的材料为氧化铟锡(ITO)。进一步地，在本实施例中，所述公共电极层213被用于作为第一电容感应电极4a，所述第一电容感应电极4a与所述第二电容感应电极3构成电容感应机构C1，用于感应施加于所述触摸显示装置的电容触摸屏1上的压力信号。其中，由于公共电极层213被复用为第一电容感应电极4a，因此在一帧画面的显示时间内，所述公共电极层213用于分时地传递公共电压信号和压力感应信号。
具体地，所述电容触摸屏1连接有触摸控制芯片(附图中未示)，所述显示面板2a连接有面板驱动芯片(附图中未示)，所述电容感应机构C1连接有压力感应控制芯片(附图中未示)；触摸控制芯片、面板驱动芯片和压力感应控制芯片可以集成到一个印刷电路板中，并通过柔性线路板(FPC)与对应的各个组件连接。触摸控制芯片驱动电容触摸屏1的触摸驱动电极11和触摸感应电极12感应出触摸的位置。并且，在一帧画面的显示时间内：显示时序时，所述公共电极层213(第一电容感应电极4a)传递公共电压信号，显示面板2a显示影像。 触控时序时，所述公共电极层213(第一电容感应电极4a)传递压力感应信号，当触摸的手指按压电容触摸屏1，显示面板2a发生形变，第一电容感应电极4a与所述第二电容感应电极3之间的距离变小，所述第一电容感应电极4a与所述第二电容感应电极3构成电容感应机构C1的电容相应地发生变化，通过建立电容变化值与压力值的相互关联，压力感应控制芯片获取电容变化信号后即可获得按压的压力信息，实现压力感应触控功能，从而使得该触摸显示装置实现了三维触摸功能。
如上实施例提供的触摸显示装置，在现有二维触摸功能的外挂式触摸显示装置的基础上，通过在中框和背光模组之间设置第二电容感应电极，第二电容感应电极与显示面板中的公共电极层构成电容感应机构，可以感应施加于显示面板上的压力信号，从而实现了三维触摸功能，其结构简单，易于实现，生产成本低。进一步地，增加的第二电容感应电极是设置在背光模组的背面，在实现三维触摸功能的同时不影响现有显示装置的显示品质。
实施例2
本实施例与实施例1不同的是，如图2所示，本实施例中，所述第一偏光片214由导电材料制备形成，所述第一偏光片214被用于作为所述第一电容感应电极4b，所述第一电容感应电极4b与第二电容感应电极3构成电容感应机构C2，所述电容感应机构C2连接有压力感应控制芯片(附图中未示)，用于感应施加于所述触摸显示装置上的压力信号。
具体地，该触摸显示装置中，由触摸控制芯片驱动电容触摸屏1的触摸驱动电极11和触摸感应电极12感应出触摸的位置。由压力感应控制芯片驱动第一电容感应电极4b和第二电容感应电极3，当触摸的手指按压电容触摸屏1，第一电容感应电极4b与所述第二电容感应电极3之间的距离变小，所述第一电容感应电极4b与第二电容感应电极3构成电容感应机构C2的电容相应地发生变化，通过建立电容变化值与压力值的相互关联，压力感应控制芯片获取电容变化信号后即可获得按压的压力信息，实现压力感应触控功能，从而使得该触摸显示装置实现了三维触摸功能。
实施例3
本实施例与实施例1不同的是，如图3所示，本实施例中，所述第一偏光片214和第一玻璃基板211之间设置有一第一导电平面215，所述第一导电平面 215被用于作为所述第一电容感应电极4c，所述第一电容感应电极4c与第二电容感应电极3构成电容感应机构C3，所述电容感应机构C3连接有压力感应控制芯片(附图中未示)，用于感应施加于所述触摸显示装置上的压力信号。其中，所述第一偏光片214是由绝缘材料制备形成，第一导电平面215的材料为氧化铟锡(ITO)。
具体地，该触摸显示装置中，由触摸控制芯片驱动电容触摸屏1的触摸驱动电极11和触摸感应电极12感应出触摸的位置。由压力感应控制芯片驱动第一电容感应电极4c和第二电容感应电极3，当触摸的手指按压电容触摸屏1，第一电容感应电极4c与所述第二电容感应电极3之间的距离变小，所述第一电容感应电极4c与第二电容感应电极3构成电容感应机构C3的电容相应地发生变化，通过建立电容变化值与压力值的相互关联，压力感应控制芯片获取电容变化信号后即可获得按压的压力信息，实现压力感应触控功能，从而使得该触摸显示装置实现了三维触摸功能。
实施例4
本实施例与实施例1不同的是，如图4所示，本实施例中，所述电容触摸屏1的触摸驱动电极11被复用为第二电容感应电极3a，因此，所述中框2c不再设置有第二电容感应电极。所述电容触摸屏1和显示模组中的显示面板2a之间具有间隙H2，在所述滤光基板22上，位于所述第二偏光片223和第二玻璃基板221之间设置有一第二导电平面224，所述第二导电平面224被用于作为所述第一电容感应电极4d，所述第一电容感应电极4d与第二电容感应电极3a构成电容感应机构C4，所述电容感应机构C4连接有压力感应控制芯片(附图中未示)，用于感应施加于所述触摸显示装置上的压力信号。其中，所述第二偏光片223是由绝缘材料制备形成的，第二导电平面224的材料为氧化铟锡(ITO)，间隙H2中可以是留空(其中为空气)或者是填充有OCA光学胶。
具体地，该触摸显示装置中，触控时序分为两部分，在第一触控时序时，由触摸控制芯片驱动电容触摸屏1的触摸驱动电极11(第二电容感应电极3a)和触摸感应电极12感应出触摸的位置；在第二触控时序时，由压力感应控制芯片驱动第一电容感应电极4d和触摸驱动电极11(第二电容感应电极3a)，当触摸的手指按压电容触摸屏1，第一电容感应电极4d与所述第二电容感应电极3a之间的距离变小，所述第一电容感应电极4d与第二电容感应电极3a构成电容感应机构C4的电容相应地发生变化，通过建立电容变化值与压力值的相互关联， 压力感应控制芯片获取电容变化信号后即可获得按压的压力信息，实现压力感应触控功能，从而使得该触摸显示装置实现了三维触摸功能。
综上所述，本发明实施例提供的具有压力感应触控功能的外挂式触摸显示装置，在结构上设置有第一电容感应电极和第二电容感应电极形成电容感应机构，通过获取电容变化信号获得按压的压力信息，实现压力感应触控功能，从而使得该触摸显示装置实现了三维触摸功能。在不需要大幅度变更现有外挂式触摸显示装置的结构的基础上，实现了三维触摸功能，具有结构简单、易于实现的特点，生产成本低。
需要说明的是，在本文中，诸如第一和第二等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来，而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。
显然，本发明的保护范围并不局限于上诉的具体实施方式，本领域的技术人员可以对发明进行各种改动和变型而不脱离本发明的精神和范围。这样，倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内，则本发明也意图包含这些改动和变型在内。

Claims (14)

  1. 一种具有压力感应触控功能的外挂式触摸显示装置，包括呈叠层设置的电容触摸屏和显示模组，所述电容触摸屏用于感应触摸信号，所述显示模组包括相对设置的显示面板和背光模组以及用于支撑所述显示面板和背光模组的中框，所述显示面板中设置有多个导电结构层，其中，所述多个导电结构层的其中之一被用于作为第一电容感应电极，所述中框的朝向所述背光模组的一侧还设置有第二电容感应电极，所述第二电容感应电极与所述背光模组之间具有间隙，所述第一电容感应电极与第二电容感应电极构成电容感应机构，用于感应施加于所述电容触摸屏上的压力信号。
  2. 根据权利要求1所述的外挂式触摸显示装置，其中，所述显示面板包括阵列基板，所述阵列基板中设置有公共电极层，所述公共电极层被用于作为所述第一电容感应电极；在一帧画面的显示时间内，所述公共电极层用于分时地传递公共电压信号和压力感应信号。
  3. 根据权利要求1所述的外挂式触摸显示装置，其中，所述显示面板包括阵列基板，所述阵列基板朝向所述背光模组的一侧设置有第一偏光片，所述第一偏光片由导电材料制备形成，所述第一偏光片被用于作为所述第一电容感应电极。
  4. 根据权利要求1所述的外挂式触摸显示装置，其中，所述第二电容感应电极的材料为ITO。
  5. 根据权利要求1所述的外挂式触摸显示装置，其中，所述显示面板包括相对设置的阵列基板和滤光基板以及位于所述阵列基板和滤光基板之间的液晶层。
  6. 根据权利要求1所述的外挂式触摸显示装置，其中，所述电容触摸屏包括异层设置的触摸驱动电极和触摸感应电极，所述触摸驱动电极和触摸感应电极用于感应施加于所述电容触摸屏上的触摸信号。
  7. 一种具有压力感应触控功能的外挂式触摸显示装置，包括呈叠层设置的电容触摸屏和显示模组，所述电容触摸屏用于感应触摸信号，所述显示模组包括相对设置的显示面板和背光模组以及用于支撑所述显示面板和背光模组的中框，其中，所述显示面板包括阵列基板，所述阵列基板按照逐渐远离所述背光 模组的方向依次包括第一偏光片和第一玻璃基板，所述第一偏光片由绝缘材料制备形成，所述第一偏光片和第一玻璃基板之间设置有一第一导电平面，所述第一导电平面被用于作为第一电容感应电极，所述中框的朝向所述背光模组的一侧还设置有第二电容感应电极，所述第二电容感应电极与所述背光模组之间具有间隙，所述第一电容感应电极与第二电容感应电极构成电容感应机构，用于感应施加于所述电容触摸屏上的压力信号。
  8. [根据细则26改正08.10.2016]　
    根据权利要求7所述的外挂式触摸显示装置，其中，所述第一导电平面的材料为ITO。
  9. [根据细则26改正08.10.2016]　
    根据权利要求7所述的外挂式触摸显示装置，其中，所述第二电容感应电极的材料为ITO。
  10. [根据细则26改正08.10.2016]　
    根据权利要求7所述的外挂式触摸显示装置，其中，所述显示面板包括相对设置的阵列基板和滤光基板以及位于所述阵列基板和滤光基板之间的液晶层。
  11. [根据细则26改正08.10.2016]　
    根据权利要求7所述的外挂式触摸显示装置，其中，所述电容触摸屏包括异层设置的触摸驱动电极和触摸感应电极，所述触摸驱动电极和触摸感应电极用于感应施加于所述电容触摸屏上的触摸信号。
  12. 一种具有压力感应触控功能的外挂式触摸显示装置，包括呈叠层设置的电容触摸屏和显示模组，所述电容触摸屏包括异层设置的用于感应触摸信号的触摸驱动电极和触摸感应电极，所述显示模组包括显示面板，其中，所述电容触摸屏和显示模组之间具有间隙，所述显示面板包括滤光基板，所述滤光基板按照逐渐远离所述电容触摸屏的方向依次包括第二偏光片和第二玻璃基板，所述第二偏光片由绝缘材料制备形成，所述第二偏光片和第二玻璃基板之间设置有一第二导电平面，所述第二导电平面与所述触摸驱动电极构成电容感应机构，用于感应施加于所述电容触摸屏上的压力信号。
  13. [根据细则26改正08.10.2016]　
    根据权利要求12所述的外挂式触摸显示装置，其中，所述第二导电平面的材料为ITO。
  14. [根据细则26改正08.10.2016]　
    根据权利要求12所述的外挂式触摸显示装置，其中，所述显示面板包括相对设置的阵列基板和滤光基板以及位于所述阵列基板和滤光基板之间的液晶层。
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