WO2017210986A1 - 压力触控式液晶显示装置及其制作方法 - Google Patents

压力触控式液晶显示装置及其制作方法 Download PDF

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Publication number
WO2017210986A1
WO2017210986A1 PCT/CN2016/093189 CN2016093189W WO2017210986A1 WO 2017210986 A1 WO2017210986 A1 WO 2017210986A1 CN 2016093189 W CN2016093189 W CN 2016093189W WO 2017210986 A1 WO2017210986 A1 WO 2017210986A1
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Prior art keywords
liquid crystal
crystal display
pressure
display device
touch
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PCT/CN2016/093189
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English (en)
French (fr)
Inventor
李曼
郭星灵
邢振周
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深圳市华星光电技术有限公司
武汉华星光电技术有限公司
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Priority to US15/309,735 priority Critical patent/US20180180918A1/en
Publication of WO2017210986A1 publication Critical patent/WO2017210986A1/zh

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    • 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
    • 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
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362—Active matrix addressed cells
    • G02F1/1368—Active matrix addressed cells in which the switching element is a three-electrode device
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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
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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
    • G06F3/0412—Digitisers structurally integrated in a display
    • G—PHYSICS
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    • 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
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    • 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
    • G06F3/0445—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
    • 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
    • G06F3/044—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
    • 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
    • G02F2202/00—Materials and properties
    • G02F2202/28—Adhesive materials or arrangements
    • 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
    • G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
    • 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
    • G06F2203/04107—Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/04—Display protection
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals

Definitions

  • the invention belongs to the field of touch display, and more particularly to a pressure touch type liquid crystal display device and a manufacturing method thereof.
  • the core component of the pressure touch function is the so-called pressure film, which can usually be printed by a screen printing process with a specific indium tin oxide pattern that implements the pressure touch function. (ITO pattern), as shown in FIG. 1, the pressure touch film 120 can be formed by printing the sensor array 122 on the film substrate 121.
  • the conventional pressure touch liquid crystal display device 100 generally includes a touch panel (TP) 131 , an LCD module 132 , and a backlight module 133 .
  • the touch panel 131 can be bonded to the LCD module 132 by the adhesive 150.
  • the pressure touch film 120 is generally disposed on the upper surface of the middle frame (or middle frame bracket) 110 of the liquid crystal display (LCD) module, and forms a pressure capacitance together with a common voltage (VCOM) electrode in the LCD module.
  • VCOM common voltage
  • the pressure touch type liquid crystal display device of the above structure requires the VCOM ITO 134 in the LCD module 132 as the other electrode of the pressure capacitor.
  • VCOM ITO 134 is required for display and some embedded TP, so there will be signal interference problems.
  • the touch panel portion of the structure and the display portion of the LCD module itself may also have signal interference, affecting the signal-to-noise ratio (SNR) of the TP. Therefore, in view of the above-mentioned problems in the prior art, there is an urgent need to develop a touch technology capable of reducing signal interference.
  • an exemplary embodiment of the present invention provides a pressure touch type liquid crystal display device, which can effectively avoid between pressure touch and display. Signal interference improves the quality of pressure touch.
  • a pressure touch type liquid crystal display device includes a touch panel and a liquid crystal display module, and the liquid crystal display module includes a film stacked in sequence. a transistor substrate, a liquid crystal layer, and a color filter substrate, the pressure touch liquid crystal display device further includes: a pressure touch film formed on a surface of the touch panel facing the liquid crystal display module; and a shielding metal layer disposed at On one surface of the color filter substrate.
  • the touch panel can be adhered to each other by the adhesive disposed on the periphery and the liquid crystal display module, and an air layer can be formed between the touch panel and the liquid crystal display module.
  • the pressure touch film and the shielding metal layer can form a pressure capacitor, and the pressure touch film and the shielding metal layer can respectively constitute two electrodes of the pressure capacitor.
  • the shielding metal layer may be disposed on a surface of the color filter substrate facing the pressure touch film.
  • the shielding metal layer may be disposed on a surface of the color filter substrate facing the liquid crystal layer.
  • a method of manufacturing a pressure touch type liquid crystal display device comprising the steps of: forming a pressure touch film on one surface of the touch panel; a thin film transistor substrate, a liquid crystal layer and a color filter substrate are formed to form a liquid crystal display module; a shielding metal layer is disposed on one surface of the color filter substrate; and the pressure touch film faces the liquid crystal display module and the touch panel is The liquid crystal display modules are attached to each other.
  • the touch panel can be adhered to each other through the adhesive disposed on the periphery and the liquid crystal display module, and an air layer can be formed between the touch panel and the liquid crystal display module.
  • the pressure touch film and the shielding metal layer can form a pressure capacitor, and the pressure touch film and the shielding metal layer can respectively constitute two electrodes of the pressure capacitor.
  • the shielding metal layer may be disposed on a surface of the color filter substrate facing the touch panel.
  • the shielding metal layer is disposed on a surface of the color filter substrate facing the liquid crystal layer.
  • the pressure touch type liquid crystal display device provided by the exemplary embodiment of the present invention can effectively avoid signal interference between the pressure touch and the display, and improve the pressure touch quality of the LCD.
  • the shielding technology layer can be used not only as an electrode of the pressure capacitor but also as a shielding layer, which can well avoid the interference problem between the LCD display signal and the TP signal, thereby ensuring the accuracy of display and touch.
  • FIG. 1 is a schematic view of a pressure touch film
  • FIG. 2 is a schematic view of a pressure touch type liquid crystal display device in the prior art
  • FIG. 3 is a schematic diagram of a pressure touch type liquid crystal display device according to an exemplary embodiment of the present invention.
  • FIG. 4 is a schematic diagram of a pressure touch type liquid crystal display device according to another exemplary embodiment of the present invention.
  • FIG. 3 is a schematic diagram of a pressure touch type liquid crystal display device 300 according to an exemplary embodiment of the present invention.
  • the pressure touch liquid crystal display device 300 includes a liquid crystal display (LCD) module, a shielding metal layer 340, a pressure touch film 350, and a touch panel (TP) 360.
  • the LCD module may include a thin film transistor (TFT) substrate 310, a liquid crystal layer 320, and a color filter (CF) substrate 330 stacked in sequence.
  • the pressure touch film 350 may be formed on the LCD module facing the touch panel 360. a surface (for example, the lower surface shown in Figure 3).
  • the pressure touch film 350 can be formed on the lower surface of the touch panel 360 by a screen printing process.
  • the pressure touch film 350 may be formed of indium tin oxide (ITO).
  • the pressure touch film 350 may be an ITO pattern formed on the lower surface of the touch panel 360 by a screen printing process.
  • the material forming the pressure touch film 350 is not limited thereto, and the pressure touch film 350 may also be formed of other transparent conductive materials.
  • the shielding metal layer 340 may be disposed on a side of the color filter substrate 330 facing the pressure touch film 350. That is, the shield metal layer 340 may be disposed on the upper side (ie, the outer side) of the color filter substrate 330.
  • the shield metal layer 340 may be formed of ITO.
  • the material forming the shield metal layer 340 is not limited thereto, and the shield metal layer 340 may also be formed of other transparent conductive materials.
  • the touch panel 360 In the state in which the pressure touch film 350 faces the LCD module, the touch panel 360 is bonded to each other through the adhesive layer 390 disposed on the periphery and the LCD module, and is combined with the touch panel 360.
  • a very thin layer of air (or air gap) is left between the LCD modules. More specifically, an air layer is left between the pressure touch film 350 and the shield metal layer 340, so that the air layer can be utilized to form an insulating medium required for realizing the pressure capacitance.
  • the adhesive 390 is an optical adhesive such as a transparent optical adhesive (OCA adhesive) or a transparent optical resin adhesive (OCR adhesive), but the invention is not limited thereto.
  • OCA adhesive transparent optical adhesive
  • OCR adhesive transparent optical resin adhesive
  • Other types of adhesives may also be used as long as the adhesive has strong adhesion and does not affect the optical transmittance.
  • the pressure touch film 350 and the shield metal layer 340 can form a pressure capacitor.
  • the pressure touch film 350 can serve as an upper electrode of the pressure capacitor
  • the shielding metal layer 340 can serve as a lower electrode of the pressure capacitor
  • an air layer formed therebetween can serve as an insulating dielectric layer in the middle of the pressure and capacitance. This forms a good pressure touch structure.
  • the pressure touch structure has the shield metal layer 340 as a separate electrode of the pressure capacitor, and does not use the common voltage electrode (VCOM ITO) 380 in the LCD module as an electrode of the pressure capacitor, the prior art can be effectively solved.
  • VCOM ITO common voltage electrode
  • the shield metal layer 340 can be used not only as a lower electrode of the pressure capacitor but also as a shield layer to well avoid interference between the LCD display signal and the TP signal, thereby ensuring protection The accuracy of the display and touch.
  • the pressure touch liquid crystal display device 300 may further include a protective cover 370 disposed on the outer side of the touch panel 360 and used to protect the touch panel 360 from the influence and damage caused by the external environment or the like.
  • the protective cover 370 may be a tempered glass cover, a plastic cover, a polymethyl methacrylate (PMMA) cover, or the like.
  • FIG. 4 is a schematic diagram of a pressure touch type liquid crystal display device 300' according to another exemplary embodiment of the present invention.
  • the pressure touch liquid crystal display device 300' of the exemplary embodiment is different from the pressure touch liquid crystal display device 300 described above with reference to FIG. 3 only in that the shielding metal layer 340' is disposed.
  • On the other surface of the color filter substrate 330' facing the liquid crystal layer 320' i.e., the lower surface as shown in Fig. 4.
  • like reference numerals designate like or like elements.
  • reference numerals 350 and 350' both denote pressure touch films
  • reference numerals 340 and 340' both indicate a shield metal layer or the like. In order to make the description more concise, descriptions identical or similar to those described above will be omitted.
  • a method for fabricating a pressure touch liquid crystal display device having the above structure may include the following steps: forming a pressure touch film 350 on one surface of the touch panel 360; and sequentially stacking the films.
  • the transistor substrate 310, the liquid crystal layer 320 and the color filter substrate 330 form an LCD module; a shielding metal layer 340 is disposed on one side of the color filter substrate 330; and the pressure touch film 350 faces the LCD module to move the touch panel
  • the 360 is adhered to each other by the adhesive 390 disposed at the periphery, and an air layer is formed between the touch panel 360 and the LCD module.
  • the shielding metal layer 340 may be disposed on a side of the color filter substrate 330 facing the touch panel 360 (refer to FIG. 3). In another example, the shield metal layer 340' may be disposed on the other side of the color filter substrate 330' facing the liquid crystal layer 320' (refer to Fig. 4).
  • the manufacturing method of the pressure touch type liquid crystal display device may further include: providing a protective cover 370 on the touch panel 360 (ie, the outer side) to protect the touch panel 360 from an external environment such as an impact.
  • the pressure touch type liquid crystal display device as described above realizes the touch function in such a manner that when the finger touches the touch panel 360 with different pressures, the degree of deformation of the pressure touch film 350 is different.
  • the difference in the spacing of the pressure capacitors which in turn causes a change in the pressure capacitance, the change in capacitance is converted into a change in the electrical signal, and the change in the electrical signal is transmitted to the processor of the touch integrated circuit (IC), whereby the processor Positioning the position and signal of the pressure touch, and finally issuing specific instructions for small and medium-sized electronic products (such as smart phones, tablets, wearable smart watches, etc.) to perform specific actions.
  • the pressure touch type liquid crystal display device can effectively solve the problem of signal interference caused by using VCOM ITO as an electrode of the pressure capacitor in the current pressure touch structure, thereby Improve the quality of pressure touch.
  • the shielding metal layer can be used as a shielding layer in addition to an electrode of the pressure capacitor, so as to well avoid the interference problem between the LCD display signal and the TP signal, thereby ensuring the accuracy of display and touch.

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Human Computer Interaction (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mathematical Physics (AREA)
  • Optics & Photonics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Liquid Crystal (AREA)
  • Computer Hardware Design (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

一种压力触控式液晶显示装置（300，300'）及其制作方法。所述装置（300，300'）包括触控面板（360，360'）和液晶显示模组（132），液晶显示模组（132）包括依次叠置的薄膜晶体管基板（310，310'）、液晶层（320，320'）和彩色滤光基板（330，330'），其中，所述压力触控式液晶显示装置（300，300'）还包括：压力触控膜（350，350'），形成在触控面板（360，360'）的面对液晶显示模组（132）的表面上；屏蔽金属层（340，340'），设置在彩色滤光基板（330，330'）的一个表面上。所述压力触控式液晶显示装置（300，300'）能够有效地避免压力触控与显示之间的信号干扰，良好提升压力触控品质。

Description

压力触控式液晶显示装置及其制作方法 技术领域
本发明属于触控显示领域，更具体地说，涉及一种压力触控式液晶显示装置及其制作方法。
背景技术
近年来，随着智能手机、平板电脑、电视等中小型电子产品的发展，用户与电子产品之间的人机交互不再局限于按键或按钮的操作，而是越来越多地需要在显示屏上直接点击或触摸来实现人机交互，触控装置则是直接点击与电子产品进行交互的平台，于是压力触控(force touch)技术便应运而生。实现压力触控功能的核心部件便是所谓的压力触控膜(force film)，这种压力触控膜通常可以是采用丝网印刷的工艺打印上特定的实现压力触控功能的氧化铟锡图案(ITO pattern)，如图1所示，可通过在薄膜基板121上印刷传感器阵列122来形成压力触控薄膜120。
如图2所示，现有的压力触控式液晶显示装置100一般包括触控面板(TP)131、LCD模组132和背光模组133。触控面板131可通过胶黏剂150粘合到LCD模组132。压力触控膜120通常被设置于液晶显示(LCD)模组的中框(或中框支架)110的上表面上，与LCD模组中的公共电压(VCOM)电极共同形成压力电容。
由于上述结构的压力触控式液晶显示装置需要以LCD模组132中的VCOM ITO 134作为压力电容的另一电极。但VCOM ITO 134又是显示和某些嵌入式TP所需要的，因此就会存在信号干扰的问题。另一方面，这种结构的触控面板部分与LCD模组的显示部分本身也会存在信号干扰，影响TP的信噪比(SNR)。因此，鉴于上述现有技术中所存在的不良问题，迫切需要开发一种能够减小信号干扰的触控技术。
发明内容
为克服现有技术中存在的上述不良问题，本发明的示例性实施例提供一种压力触控式液晶显示装置，所述压力触控式液晶显示装置能够有效地避免压力触控与显示之间的信号干扰，提升压力触控品质。
根据本发明的示例性实施例一方面，提供一种压力触控式液晶显示装置，压力触控式液晶显示装置，包括触控面板和液晶显示模组，液晶显示模组包括依次叠置的薄膜晶体管基板、液晶层和彩色滤光基板，所述压力触控式液晶显示装置还包括：压力触控膜，形成在触控面板的面对液晶显示模组的表面上；屏蔽金属层，设置在彩色滤光基板的一个表面上。
优选地，触控面板可通过设置在外围的胶黏剂与液晶显示模组彼此贴合，并且触控面板与液晶显示模组之间可形成有空气层。
优选地，所述压力触控膜和屏蔽金属层可形成压力电容，并且压力触控膜和屏蔽金属层可分别构成所述压力电容的两个电极。
优选地，所述屏蔽金属层可设置在彩色滤光基板的面对压力触控膜的表面上。
优选地，所述屏蔽金属层可设置在彩色滤光基板的面对液晶层的表面上。
根据本发明的示例性实施例另一方面，提供一种压力触控式液晶显示装置的制造方法，所述制造方法包括如下步骤：在触控面板的一个表面上形成压力触控膜；依次叠置薄膜晶体管基板、液晶层和彩色滤光基板，形成液晶显示模组；在彩色滤光基板的一个表面上设置屏蔽金属层；使压力触控膜面对液晶显示模组而将触控面板与液晶显示模组彼此贴合。
优选地，触控面板可通过设置在外围的胶黏剂与液晶显示模组彼此贴合，并在触控面板与液晶显示模组之间可形成空气层。
优选地，所述压力触控膜和屏蔽金属层可形成压力电容，并且压力触控膜和屏蔽金属层可分别构成所述压力电容的两个电极。
优选地，屏蔽金属层可设置在彩色滤光基板的面对触控面板的表面上。
优选地，屏蔽金属层设置在彩色滤光基板的面对液晶层的表面上。
根据本发明的示例性实施例提供的压力触控式液晶显示装置能够有效避免压力触控与显示之间的信号干扰，提升LCD的压力触控品质。另外，屏蔽技术层不仅可以用作压力电容的一个电极，也可作为屏蔽层，良好地避免了LCD显示信号与TP信号之间的干扰问题，从而保证了显示和触控的精准度。
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，一部分将通过描述而变得清楚，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是压力触控膜的示意图；
图2是现有技术中的压力触控式液晶显示装置的示意图；
图3是根据本发明的示例性实施例的压力触控式液晶显示装置的示意图；
图4是根据本发明的另一示例性实施例的压力触控式液晶显示装置的示意图。
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或相似的部件。以下将通过参照附图来说明所述实施例，以便解释本发明。在此需要说明的是，提供附图仅为了帮助本领域技术人员充分地了解根据本发明的示例性实施例的液晶显示装置的结构及其工作原理，并非意在限制本发明。
图3是根据本发明的示例性实施例的压力触控式液晶显示装置300的示意图。
在本示例中，压力触控式液晶显示装置300包括液晶显示(LCD)模组、屏蔽金属层340、压力触控膜350和触控面板(TP)360。其中，LCD模组可包括依次叠置的薄膜晶体管(TFT)基板310、液晶层320和彩色滤光(CF)基板330，压力触控膜350可形成在触控面板360的面对LCD模组的一个表面 (例如，图3中所示的下表面)上。优选地，压力触控膜350可通过丝网印刷工艺形成在触控面板360的下表面上。在本示例中，压力触控膜350可由氧化铟锡(ITO)形成。即，压力触控膜350可为通过丝网印刷工艺形成在触控面板360的下表面上的ITO图案。然而，形成压力触控膜350的材料不限于此，压力触控膜350也可由其他透明导电材料形成。
在本示例中，屏蔽金属层340可设置于彩色滤光基板330的面对压力触控膜350的一侧。也就是说，屏蔽金属层340可设置于彩色滤光基板330的上侧(即，外侧)。屏蔽金属层340可由ITO形成。然而，形成屏蔽金属层340的材料不限于此，屏蔽金属层340也可由其他透明导电材料形成。
其中，在压力触控膜350面对LCD模组的状态下，将触控面板360通过设置在外围的胶黏剂390与LCD模组通过一次贴合而彼此结合，并且在触控面板360与LCD模组之间留有很薄的一层空气层(或气隙)。更具体地说，在压力触控膜350与屏蔽金属层340之间留有空气层，如此便可利用这层空气层去构成实现压力电容所需的绝缘介质。
这里，胶黏剂390采用光学胶，例如，透明光学胶(OCA胶)或透明光学树脂胶(OCR胶)，但本发明不限于此。也可以采用其他类型的胶黏剂，只要所述胶黏剂的粘合性强且不影响光学透过率即可。
压力触控膜350和屏蔽金属层340可形成压力电容。具体地，参照图3，压力触控膜350可充当压力电容的上电极，屏蔽金属层340可充当压力电容的下电极，两者之间形成的空气层可充当压力电容中间的绝缘介质层，如此便形成一个良好的压力触控结构。
由于这种压力触控结构具有屏蔽金属层340作为压力电容的独立的电极，而不使用LCD模组中的公共电压电极(VCOM ITO)380作为压力电容的一个电极，可有效地解决现有技术中利用VCOM ITO作为压力电容的一个电极所导致的信号干扰的问题，从而有效地避免压力触控与显示之间的信号干扰，提升压力触控式液晶显示装置的压力触控品质。
此外，由于屏蔽金属层340不仅可以用作压力电容的下电极，而且可以用作屏蔽层，以良好地避免LCD显示信号与TP信号之间的干扰问题，从而可保 证显示和触控的精准度。
作为示例，压力触控式液晶显示装置300还可包括保护盖板370，设置在触控面板360的外侧，并用于保护触控面板360免受由外界环境等引起的影响和损坏。在此，保护盖板370可以是强化玻璃盖板、塑料盖板、聚甲基丙烯酸甲酯(PMMA)盖板等。
图4是根据本发明的另一示例性实施例的压力触控式液晶显示装置300’的示意图。
如图4所示，该示例性实施例的压力触控式液晶显示装置300’与上面参照图3所描述的压力触控式液晶显示装置300的不同之处仅在于：屏蔽金属层340’设置在彩色滤光基板330’的面对液晶层320’的另一表面(即，如图4中所示的下表面)上。在图3和图4中，相似的标号指示相同或相似的元件，例如，标号350和350’均代表压力触控膜，标号340和340’均指示屏蔽金属层等。为了使描述更加简洁，将省略与上面所描述的内容相同或相似的描述。
下面将参照图3和图4描述一种制作具有上述结构的压力触控式液晶显示装置的方法可包括如下步骤：在触控面板360的一个表面上形成压力触控膜350；依次叠置薄膜晶体管基板310、液晶层320和彩色滤光基板330，形成LCD模组；在彩色滤光基板330的一侧设置屏蔽金属层340；使压力触控膜350面对LCD模组而将触控面板360通过设置在外围的胶黏剂390与LCD模组彼此贴合，并且在触控面板360与LCD模组之间形成空气层。
在一个示例中，可将屏蔽金属层340设置在彩色滤光基板330的面对触控面板360的一侧(参照图3)。在另一示例中，可将屏蔽金属层340’设置在彩色滤光基板330’的面对液晶层320’的另一侧(参照图4)。
压力触控式液晶显示装置的制作方法还可包括：在触控面板360上(即，外侧)设置保护盖板370，以保护触控面板360免受诸如撞击等外界环境的影响。
如上所述的压力触控式液晶显示装置这样来实现触控功能：当手指以不同大小的压力去触摸触控面板360时，由于压力触控膜350的形变程度不同，引 起压力电容的间距大小的不同，进而引起压力电容量的变化，电容量的变化转化成电信号的变化，电信号的变化传递到触控集成电路(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，让中小型电子产品(诸如智能手机、平板电脑、穿戴式智能手表等)执行特定的动作。
根据以上描述可知，根据本发明的示例性实施例的压力触控式液晶显示装置能够有效地解决目前压力触控结构中利用VCOM ITO作为压力电容的一个电极所导致的信号干扰的问题，从而可提升压力触控的品质。此外，屏蔽金属层除了可作为压力电容的一个电极之外，还可用作屏蔽层，以良好地避免LCD显示信号与TP信号之间的干扰问题，从而保证显示和触控的精准度。
本发明的以上示例性实施例仅仅是作为示例，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 (10)

  1. 一种压力触控式液晶显示装置，包括触控面板和液晶显示模组，液晶显示模组包括依次叠置的薄膜晶体管基板、液晶层和彩色滤光基板，其中，所述压力触控式液晶显示装置还包括：
    压力触控膜，形成在触控面板的面对液晶显示模组的表面上；
    屏蔽金属层，设置在彩色滤光基板的一个表面上。
  2. 根据权利要求1所述的压力触控式液晶显示装置，其中，触控面板通过设置在外围的胶黏剂与液晶显示模组彼此贴合，并且触控面板与液晶显示模组之间形成有空气层。
  3. 根据权利要求2所述的压力触控式液晶显示装置，其中，所述压力触控膜和屏蔽金属层形成压力电容，并且压力触控膜和屏蔽金属层分别构成所述压力电容的两个电极。
  4. 根据权利要求1所述的压力触控式液晶显示装置，其中，所述屏蔽金属层设置在彩色滤光基板的面对压力触控膜的表面上。
  5. 根据权利要求1所述的压力触控式液晶显示装置，其中，所述屏蔽金属层设置在彩色滤光基板的面对液晶层的表面上。
  6. 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：
    在触控面板的一个表面上形成压力触控膜；
    依次叠置薄膜晶体管基板、液晶层和彩色滤光基板，形成液晶显示模组；
    在彩色滤光基板的一个表面上设置屏蔽金属层；
    使压力触控膜面对液晶显示模组而将触控面板与液晶显示模组彼此贴合。
  7. 根据权利要求6所述的压力触控式液晶显示装置的制造方法，其中，触控面板通过设置在外围的胶黏剂与液晶显示模组彼此贴合，并在触控面板与 液晶显示模组之间形成空气层。
  8. 根据权利要求6所述的压力触控式液晶显示装置的制造方法，其中，所述压力触控膜和屏蔽金属层形成压力电容，并且压力触控膜和屏蔽金属层分别构成所述压力电容的两个电极。
  9. 根据权利要求6所述的压力触控式液晶显示装置的制造方法，其中，屏蔽金属层设置在彩色滤光基板的面对触控面板的表面上。
  10. 根据权利要求6所述的压力触控式液晶显示装置的制造方法，其中，屏蔽金属层设置在彩色滤光基板的面对液晶层的表面上。
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109212806A (zh) * 2018-10-08 2019-01-15 新辉开科技（深圳）有限公司 一种动态压力感知的液晶显示模组及其加工方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105892124B (zh) * 2016-06-06 2019-09-17 深圳市华星光电技术有限公司 一种压力触控式液晶显示装置
KR102636492B1 (ko) * 2018-07-30 2024-02-14 삼성디스플레이 주식회사 표시 장치

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102279687A (zh) * 2010-06-08 2011-12-14 胜华科技股份有限公司 触控面板与其应用的触控式显示装置
US20150253607A1 (en) * 2014-03-06 2015-09-10 Lg Display Co., Ltd. Liquid Crystal Display Device
CN105093725A (zh) * 2015-09-15 2015-11-25 京东方科技集团股份有限公司 阵列基板、显示面板以及显示装置
CN105182588A (zh) * 2015-09-28 2015-12-23 友达光电股份有限公司 一种内嵌式触控面板
CN105278722A (zh) * 2014-07-25 2016-01-27 南京瀚宇彩欣科技有限责任公司 触控面板隐形感测层的雷射图案化设备及雷射图案化网栅
CN105511669A (zh) * 2015-11-30 2016-04-20 信利光电股份有限公司 一种具有压力检测功能的触控屏及电子设备

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101581849B (zh) * 2009-06-23 2011-01-05 友达光电股份有限公司 触控式液晶显示面板及液晶显示面板
TWI560604B (en) * 2014-10-17 2016-12-01 Mstar Semiconductor Inc Touch display device and driving method thereof
KR102456654B1 (ko) * 2014-11-26 2022-10-18 가부시키가이샤 한도오따이 에네루기 켄큐쇼 표시 장치 및 전자 기기
KR102615384B1 (ko) * 2014-12-23 2023-12-19 케임브리지 터치 테크놀로지스 리미티드 압력감지 방식 터치 패널
CN104503630A (zh) * 2015-01-19 2015-04-08 欧浦登（顺昌）光学有限公司 一种全密封触控液晶一体屏及其制造工艺
CN105676509A (zh) * 2016-03-25 2016-06-15 武汉华星光电技术有限公司 压力触控液晶显示面板及制作方法
CN105892124B (zh) * 2016-06-06 2019-09-17 深圳市华星光电技术有限公司 一种压力触控式液晶显示装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102279687A (zh) * 2010-06-08 2011-12-14 胜华科技股份有限公司 触控面板与其应用的触控式显示装置
US20150253607A1 (en) * 2014-03-06 2015-09-10 Lg Display Co., Ltd. Liquid Crystal Display Device
CN105278722A (zh) * 2014-07-25 2016-01-27 南京瀚宇彩欣科技有限责任公司 触控面板隐形感测层的雷射图案化设备及雷射图案化网栅
CN105093725A (zh) * 2015-09-15 2015-11-25 京东方科技集团股份有限公司 阵列基板、显示面板以及显示装置
CN105182588A (zh) * 2015-09-28 2015-12-23 友达光电股份有限公司 一种内嵌式触控面板
CN105511669A (zh) * 2015-11-30 2016-04-20 信利光电股份有限公司 一种具有压力检测功能的触控屏及电子设备

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109212806A (zh) * 2018-10-08 2019-01-15 新辉开科技（深圳）有限公司 一种动态压力感知的液晶显示模组及其加工方法

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