WO2017161604A1 - 压力触控液晶显示面板及制作方法 - Google Patents

压力触控液晶显示面板及制作方法 Download PDF

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Publication number
WO2017161604A1
WO2017161604A1 PCT/CN2016/078689 CN2016078689W WO2017161604A1 WO 2017161604 A1 WO2017161604 A1 WO 2017161604A1 CN 2016078689 W CN2016078689 W CN 2016078689W WO 2017161604 A1 WO2017161604 A1 WO 2017161604A1
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WIPO (PCT)
Prior art keywords
liquid crystal
force sensing
crystal display
display panel
backlight
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2016/078689
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English (en)
French (fr)
Inventor
黄耀立
贺兴龙
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuhan China Star Optoelectronics Technology Co Ltd
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Wuhan China Star Optoelectronics Technology Co Ltd
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Application filed by Wuhan China Star Optoelectronics Technology Co Ltd filed Critical Wuhan China Star Optoelectronics Technology Co Ltd
Priority to US15/116,803 priority Critical patent/US9995955B2/en
Publication of WO2017161604A1 publication Critical patent/WO2017161604A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • 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
    • G02F1/133528—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
    • 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
    • G02F1/133608—Direct backlight including particular frames or supporting 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
    • 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
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • 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
    • 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
    • G02F1/133317—Intermediate frames, e.g. between backlight housing and front frame
    • 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
    • G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
    • 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

Definitions

  • the present invention relates to the field of touch technologies, and in particular, to a pressure touch liquid crystal display panel and a manufacturing method thereof.
  • the pressure touch liquid crystal display panel 10 includes a touch screen 11 , a liquid crystal panel 12 , a backlight 13 , and a pressure touch panel 14 .
  • the pressure touch panel 14 is disposed under the backlight 13 and includes a force sensing conductive layer 141 and a fixed metal layer 142 (such as a metal middle frame of the pressure touch liquid crystal display panel 10), a force sensing conductive layer 141 and a fixed metal layer 142. A capacitor is formed between them.
  • the force-induced conductive layer 141 is deformed correspondingly due to the pressure between the finger and the touch screen 11, thereby causing a change in the capacitance value of the capacitor, and the conductive layer 141 and the fixed metal layer are induced by the force before and after the pressing.
  • the amount of change in capacitance between 142 and then calculate the pressure.
  • the pressure touch panel 14 of the existing capacitive pressure touch liquid crystal display panel is externally attached to the outside of the liquid crystal panel 12, which increases the overall thickness of the pressure touch liquid crystal display panel, which is disadvantageous for the capacitive pressure touch liquid crystal display.
  • the thin design of the panel In addition, the force sensing metal layer 141 of the pressure touch panel needs to be better attached to the outside of the backlight 13 , so the manufacturing cost of the capacitive pressure touch liquid crystal display panel is also high.
  • the present invention provides a pressure touch liquid crystal display panel that can be thinned and has a low manufacturing cost, and a manufacturing method thereof, to solve the problem that the existing pressure touch liquid crystal display panel and the manufacturing method have a large overall thickness. Making technical problems with higher costs.
  • the embodiment of the invention provides a pressure touch liquid crystal display panel, which comprises:
  • An upper polarizing plate disposed on an upper surface of the liquid crystal panel; configured to filter polarized light of a set polarization state;
  • a touch screen disposed on an upper surface of the upper polarizing plate for receiving a touch signal
  • a force sensing layer disposed on a lower surface of the liquid crystal panel as a first substrate of the force sensing capacitor
  • a lower polarizing plate disposed on a lower surface of the force sensing layer for filtering polarized light of a set polarization state
  • a backlight disposed on a lower surface of the lower polarizer for providing a display light source
  • a backlight metal iron frame disposed outside the backlight and having a set gap with the backlight as a second substrate of the force sensing capacitor;
  • the force sensing layer is a transparent conductive layer; the gap between the backlight metal iron frame and the force sensing layer is 0.1 mm to 2 mm.
  • the force sensing layer has a thickness of 30 nm to 100 nm.
  • the force sensing layer is formed on the lower surface of the liquid crystal panel by sputtering.
  • the force sensing layer and the backlight metal iron frame form a force sensing capacitor.
  • the embodiment of the invention further provides a pressure touch liquid crystal display panel, which comprises:
  • An upper polarizing plate disposed on an upper surface of the liquid crystal panel; configured to filter polarized light of a set polarization state;
  • a touch screen disposed on an upper surface of the upper polarizing plate for receiving a touch signal
  • a force sensing layer disposed on a lower surface of the liquid crystal panel as a first substrate of the force sensing capacitor
  • a lower polarizing plate disposed on a lower surface of the force sensing layer for filtering polarized light of a set polarization state
  • a backlight disposed on a lower surface of the lower polarizer for providing a display light source
  • the backlight metal iron frame is disposed outside the backlight and has a set gap with the backlight as a second substrate of the force sensing capacitor.
  • the force sensing layer is a transparent conductive layer.
  • the force sensing layer is formed on the lower surface of the liquid crystal panel by sputtering.
  • the gap between the backlight metal iron frame and the force sensing layer is 0.1 mm to 2 mm.
  • the force sensing layer has a thickness of 30 nm to 100 nm.
  • the force sensing layer and the backlight metal iron frame form a force sensing capacitor.
  • the embodiment of the invention further provides a method for manufacturing a pressure touch liquid crystal display panel, which comprises:
  • An upper polarizing plate and a touch screen are sequentially disposed on an upper surface of the liquid crystal panel;
  • a lower polarizing plate, a backlight, and a backlight metal iron frame are sequentially disposed on a lower surface of the liquid crystal panel, wherein the backlight metal iron frame and the backlight have a set gap.
  • the method further includes the steps of:
  • a display driving circuit of the liquid crystal panel and a pressure sensing driving circuit of the force sensing layer are provided.
  • the force sensing layer and the backlight metal iron frame form a force sensing capacitor.
  • the force sensing layer is a transparent conductive layer.
  • the force sensing layer is formed on a lower surface of the liquid crystal panel by sputtering.
  • the force sensing layer has a thickness of 30 nm to 100 nm.
  • the gap between the backlight metal iron frame and the force sensing layer is 0.1 mm to 2 mm.
  • the pressure touch liquid crystal display panel and the manufacturing method thereof can further reduce the thickness of the pressure touch liquid crystal display panel by providing a force sensing layer on the lower surface of the liquid crystal panel, and the overall manufacturing cost of the pressure touch liquid crystal display panel is low;
  • the invention solves the technical problem that the overall pressure touch liquid crystal display panel and the manufacturing method have large overall thickness and high production cost.
  • FIG. 1 is a schematic structural view of a conventional capacitive pressure touch liquid crystal display panel
  • FIG. 2 is a schematic structural view of a preferred embodiment of a pressure touch liquid crystal display panel of the present invention
  • FIG. 3 is a flow chart of a preferred embodiment of a method of fabricating a pressure touch liquid crystal display panel of the present invention.
  • FIG. 2 is a schematic structural view of a preferred embodiment of the pressure touch liquid crystal display panel of the present invention.
  • the pressure touch liquid crystal display panel 20 includes a liquid crystal panel 21, an upper polarizing plate 22, a touch screen 23, a force sensing layer 24, a lower polarizing plate 25, a backlight 26, and a backlight metal iron frame 27.
  • the upper polarizing plate 22 is disposed on the upper surface of the liquid crystal panel 21; for filtering the polarized light of the set polarization state; the touch screen 23 is disposed on the upper surface of the upper polarizing plate 22 for receiving the touch signal; and the force sensing layer 24 is disposed on the liquid crystal
  • the lower surface of the panel 21 serves as a first substrate of the force sensing capacitor; the lower polarizing plate 25 is disposed on the lower surface of the force sensing layer 24 for filtering polarized light of a set polarization state; and the backlight 26 is disposed under the lower polarizing plate 25.
  • the surface is used to provide a display light source; the backlight metal iron frame 27 is disposed outside the backlight 26 and has a set gap with the backlight 26 as a second substrate of the force sensing capacitor.
  • the force sensing layer 24 is a transparent conductive layer such as ITO (Indium Tin).
  • ITO Indium Tin
  • the Oxides indium tin oxide layer can be formed on the lower surface of the liquid crystal panel 21 by sputtering, and the force sensing layer 24 has a thickness of 30 nm to 100 nm.
  • the force sensing layer 24 is designed as a transparent conductive layer, which does not affect the normal display operation of the liquid crystal panel 21, and the thickness of the force sensing layer 24 is small, and the thickness of the pressure touch liquid crystal display panel 20 is less affected.
  • the force sensing layer 24 and the backlight metal iron frame 27 form a force sensing capacitance.
  • the touch screen 23 receives the pressure signal and causes a force.
  • the sensing layer 24 is deformed, causing the distance between the force sensing layer 24 and the backlight metal iron frame 27 to change, thereby causing a change in the capacitance value of the force sensing capacitor; and collecting the capacitance between the force sensing layer 24 and the backlight metal iron frame 27 before and after pressing.
  • the force sensing layer 24 of the pressure touch liquid crystal display panel 20 of the preferred embodiment is disposed in the panel structure, and the overall thickness of the pressure touch liquid crystal display panel 20 is small, and the force sensing layer 24 and the liquid crystal panel 21 are not required. Because of the bonding operation, the pressure touch liquid crystal display panel 20 can be thinned and the manufacturing cost is low.
  • the pressure touch liquid crystal display panel of the preferred embodiment can further reduce the thickness of the pressure touch liquid crystal display panel by providing a force sensing layer on the lower surface of the liquid crystal panel, and the overall manufacturing cost of the pressure touch liquid crystal display panel is low.
  • FIG. 3 is a flow chart of a preferred embodiment of a method for fabricating a pressure touch liquid crystal display panel of the present invention.
  • the manufacturing method of the pressure touch liquid crystal display panel comprises:
  • Step S301 providing a liquid crystal panel
  • Step S302 forming a transparent conductive layer on the lower surface of the liquid crystal panel
  • Step S303 performing a pattern processing on the transparent conductive layer to form a force sensing layer
  • Step S304 sequentially setting an upper polarizing plate and a touch screen on the upper surface of the liquid crystal panel
  • Step S305 sequentially setting a lower polarizing plate, a backlight, and a backlight metal iron frame on the lower surface of the liquid crystal panel, wherein the backlight metal iron frame and the backlight have a set gap;
  • Step S306 setting a display driving circuit of the liquid crystal panel and a pressure sensing driving circuit of the force sensing layer.
  • a liquid crystal panel is provided, which may be a thinned liquid crystal panel.
  • the thickness of the liquid crystal panel may be about 0.4 mm.
  • the liquid crystal panel may not be thinned; Go to step S302.
  • a transparent conductive layer such as ITO (Indium Tin) is sputtered on the outer surface of the array substrate of the liquid crystal panel.
  • the Oxides indium tin oxide layer preferably has a thickness of 30 nm to 100 nm. Then it proceeds to step S303.
  • step S303 the transparent conductive layer sputtered in step S302 is patterned to form a force sensing layer having a shape of a touch electrode. Then it proceeds to step S304.
  • step S304 an upper polarizing plate and a touch panel are sequentially disposed on the upper surface of the liquid crystal panel on which the force sensing layer is formed. Then it proceeds to step S305.
  • step S305 a lower polarizing plate, a backlight, and a backlight metal iron frame are sequentially disposed on a lower surface of the liquid crystal panel on which the force sensing layer is formed, wherein the backlight metal iron frame and the backlight have a set gap; thus the force sensing layer and the backlight The metal iron frame can form a force sensing capacitor. Then it proceeds to step S306.
  • a display driving circuit of the liquid crystal panel and a pressure sensing driving circuit of the force sensing layer are provided. If using a flexible circuit board (FPC, Flexible Printed Circuit) connects the force sensing electrode of the force sensing layer with an external force sensing chip, and connects the pixel electrode of the liquid crystal panel with the external display driving chip by using a flexible circuit board.
  • FPC Flexible Printed Circuit
  • the manufacturing process of the pressure touch liquid crystal display panel of the preferred embodiment is completed.
  • the pressure touch liquid crystal display panel refer to the related description in the preferred embodiment of the pressure touch liquid crystal display panel described above.
  • the pressure touch liquid crystal display panel and the manufacturing method thereof can further reduce the thickness of the pressure touch liquid crystal display panel by providing a force sensing layer on the lower surface of the liquid crystal panel, and the overall manufacturing cost of the pressure touch liquid crystal display panel is low;
  • the invention solves the technical problem that the overall pressure touch liquid crystal display panel and the manufacturing method have large overall thickness and high production cost.

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

Abstract

一种压力触控液晶显示面板（20），其包括液晶面板（21）、上偏光板（22）、触摸屏（23）、力感应层（24）、下偏光板（25）、背光源（26）以及背光金属铁框（27）；上偏光板（22）设置在液晶面板（21）的上表面；触摸屏（23）设置在上偏光板（22）的上表面；力感应层（24）设置在液晶面板（21）的下表面；下偏光板（25）设置在力感应层（24）的下表面；背光源（26）设置在下偏光板（25）的下表面；背光金属铁框（27）设置在背光源（26）的外侧。

Description

压力触控液晶显示面板及制作方法 技术领域
本发明涉及触控技术领域，特别涉及一种压力触控液晶显示面板及制作方法。
 背景技术
图1为现有的电容式压力触控液晶显示面板的结构示意图，该压力触控液晶显示面板10包括触摸屏11、液晶面板12、背光源13以及压力触控面板14。其中压力触控面板14设置在背光源13的下方，包括力感应导电层141以及固定金属层142（如压力触控液晶显示面板10的金属中框），力感应导电层141和固定金属层142之间形成电容。
当手指按压到触摸屏11时，由于手指与触摸屏11之间的压力导致力感应导电层141发生相应的形变，从而导致电容的电容值发生变化，通过采集按压前后力感应导电层141与固定金属层142之间电容值变化量，进而推算出压力大小。
但是现有的电容式压力触控液晶显示面板的压力触控面板14都是外挂于液晶面板12的外侧，这样会增加压力触控液晶显示面板的整体厚度，不利于电容式压力触控液晶显示面板的薄型化设计。此外压力触控面板的力感应金属层141需要较好的贴合在背光源13的外侧，因此该电容式压力触控液晶显示面板的制作成本也较高。
故，有必要提供一种压力触控液晶显示面板及制作方法，以解决现有技术所存在的问题。
 技术问题
有鉴于此，本发明提供一种可进行薄型化设计且制作成本较低的压力触控液晶显示面板及制作方法；以解决现有的压力触控液晶显示面板及制作方法的整体厚度较大且制作成本较高的技术问题。
 技术解决方案
本发明实施例提供一种压力触控液晶显示面板，其包括：
液晶面板，
上偏光板，设置在所述液晶面板的上表面；用于过滤设定偏振态的偏振光；
触摸屏，设置在所述上偏光板的上表面，用于接收触控信号；
力感应层，设置在所述液晶面板的下表面，作为力感应电容的第一基板；
下偏光板，设置在所述力感应层的下表面，用于过滤设定偏振态的偏振光；
背光源，设置在所述下偏光板的下表面，用于提供显示光源；以及
背光金属铁框，设置在所述背光源的外侧，与所述背光源具有设定间隙，作为力感应电容的第二基板；
其中所述力感应层为透明导电层；所述背光金属铁框与所述力感应层的间隙为0.1mm至2mm。
在本发明所述的压力触控液晶显示面板中，所述力感应层的厚度为30nm至100nm。
在本发明所述的压力触控液晶显示面板中，通过溅镀的方式在所述液晶面板的下表面形成所述力感应层。
在本发明所述的压力触控液晶显示面板中，所述力感应层和所述背光金属铁框形成力感应电容。
本发明实施例还提供一种压力触控液晶显示面板，其包括：
液晶面板，
上偏光板，设置在所述液晶面板的上表面；用于过滤设定偏振态的偏振光；
触摸屏，设置在所述上偏光板的上表面，用于接收触控信号；
力感应层，设置在所述液晶面板的下表面，作为力感应电容的第一基板；
下偏光板，设置在所述力感应层的下表面，用于过滤设定偏振态的偏振光；
背光源，设置在所述下偏光板的下表面，用于提供显示光源；以及
背光金属铁框，设置在所述背光源的外侧，与所述背光源具有设定间隙，作为力感应电容的第二基板。
在本发明所述的压力触控液晶显示面板中，所述力感应层为透明导电层。
在本发明所述的压力触控液晶显示面板中，通过溅镀的方式在所述液晶面板的下表面形成所述力感应层。
在本发明所述的压力触控液晶显示面板中，所述背光金属铁框与所述力感应层的间隙为0.1mm至2mm。
在本发明所述的压力触控液晶显示面板中，所述力感应层的厚度为30nm至100nm。
在本发明所述的压力触控液晶显示面板中，所述力感应层和所述背光金属铁框形成力感应电容。
本发明实施例还提供一种压力触控液晶显示面板的制作方法，其包括：
提供一液晶面板；
在所述液晶面板的下表面形成一透明导电层；
对所述透明导电层进行图形化处理，形成力感应层；
在所述液晶面板的上表面依次设置上偏光板以及触摸屏；以及
在所述液晶面板的下表面依次设置下偏光板、背光源以及背光金属铁框，其中所述背光金属铁框与所述背光源具有设定间隙。
在本发明所述的压力触控液晶显示面板的制作方法中，在所述液晶面板的下表面依次设置下偏光板、背光源以及背光金属铁框的步骤之后还包括步骤：
设置所述液晶面板的显示驱动电路以及所述力感应层的压力感应驱动电路。
在本发明所述的压力触控液晶显示面板的制作方法中，所述力感应层和所述背光金属铁框形成力感应电容。
在本发明所述的压力触控液晶显示面板的制作方法中，所述力感应层为透明导电层。
在本发明所述的压力触控液晶显示面板的制作方法中，通过溅镀的方式在所述液晶面板的下表面形成所述力感应层。
在本发明所述的压力触控液晶显示面板的制作方法中，所述力感应层的厚度为30nm至100nm。
在本发明所述的压力触控液晶显示面板的制作方法中，所述背光金属铁框与所述力感应层的间隙为0.1mm至2mm。
 有益效果
本发明的压力触控液晶显示面板及制作方法通过在液晶面板下表面设置力感应层，可进一步减小压力触控液晶显示面板的厚度，且压力触控液晶显示面板的整体制作成本较低；解决了现有的压力触控液晶显示面板及制作方法的整体厚度较大且制作成本较高的技术问题。
 附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面对实施例中所需要使用的附图作简单的介绍。下面描述中的附图仅为本发明的部分实施例，对于本领域普通技术人员而言，在不付出创造性劳动的前提下，还可以根据这些附图获取其他的附图。
图1为现有的电容式压力触控液晶显示面板的结构示意图；
图2为本发明的压力触控液晶显示面板的优选实施例的结构示意图；
图3为本发明的压力触控液晶显示面板的制作方法的优选实施例的流程图。
 本发明的最佳实施方式
请参照附图中的图式，其中相同的组件符号代表相同的组件。以下的说明是基于所例示的本发明具体实施例，其不应被视为限制本发明未在此详述的其它具体实施例。
请参照图2，图2为本发明的压力触控液晶显示面板的优选实施例的结构示意图。该压力触控液晶显示面板20包括液晶面板21、上偏光板22、触摸屏23、力感应层24、下偏光板25、背光源26以及背光金属铁框27。
上偏光板22设置在液晶面板21的上表面；用于过滤设定偏振态的偏振光；触摸屏23设置在上偏光板22的上表面，用于接收触控信号；力感应层24设置在液晶面板21的下表面，作为力感应电容的第一基板；下偏光板25设置在力感应层24的下表面，用于过滤设定偏振态的偏振光；背光源26设置在下偏光板25的下表面，用于提供显示光源；背光金属铁框27设置在背光源26的外侧，与背光源26具有设定间隙，作为力感应电容的第二基板。
在本发明的压力触控液晶显示面板20中，力感应层24为透明导电层，如ITO（Indium Tin Oxides氧化铟锡）层，可通过溅镀的方式在液晶面板21的下表面形成该力感应层24，该力感应层24的厚度为30nm至100nm。力感应层24设计为透明导电层，不会影响到液晶面板21的正常显示操作，且力感应层24的厚度较小，对压力触控液晶显示面板20的厚度影响较小。
本优选实施例的压力触控液晶显示面板20使用时，力感应层24与背光金属铁框27形成力感应电容，当用户在触摸屏23进行按压操作时，触摸屏23接收到压力信号，并引起力感应层24发生形变，造成力感应层24和背光金属铁框27的距离发生变化，进而引起力感应电容的电容值发生变化；通过采集按压前后力感应层24和背光金属铁框27之间电容值变化量，进而推算出压力大小。。
同时本优选实施例的压力触控液晶显示面板20的力感应层24设置在面板结构中，压力触控液晶显示面板20的整体厚度较小，且不需要进行力感应层24和液晶面板21的贴合操作，因此该压力触控液晶显示面板20可进行薄型化设计且制作成本较低。
本优选实施例的压力触控液晶显示面板通过在液晶面板下表面设置力感应层，可进一步减小压力触控液晶显示面板的厚度，且压力触控液晶显示面板的整体制作成本较低。
本发明还提供一种压力触控液晶显示面板的制作方法，请参照图3，图3为本发明的压力触控液晶显示面板的制作方法的优选实施例的流程图。该压力触控液晶显示面板的制作方法包括：
步骤S301，提供一液晶面板；
步骤S302，在液晶面板的下表面形成一透明导电层；
步骤S303，对透明导电层进行图形化处理，形成力感应层；
步骤S304，在液晶面板的上表面依次设置上偏光板以及触摸屏；
步骤S305，在液晶面板的下表面依次设置下偏光板、背光源以及背光金属铁框，其中背光金属铁框与背光源具有设定间隙；
步骤S306，设置液晶面板的显示驱动电路以及力感应层的压力感应驱动电路。
下面详细说明本优选实施例的压力触控液晶显示面板的制作方法的各步骤的具体流程。
在步骤S301中，提供一液晶面板，该液晶面板可为做过薄化的液晶面板，该液晶面板的厚度可为0.4mm左右，当然这里也可为未做过薄化的液晶面板；随后转到步骤S302。
在步骤S302中，在液晶面板的阵列基板的外表面溅镀一层透明导电层，如ITO（Indium Tin Oxides氧化铟锡）层，该透明导电层的厚度优选为30nm至100nm。随后转到步骤S303。
在步骤S303中，对步骤S302溅镀的透明导电层进行图形化处理，形成具有触控电极形状的力感应层。随后转到步骤S304。
在步骤S304中，在制作了力感应层的液晶面板的上表面依次设置上偏光板以及触摸屏。随后转到步骤S305。
在步骤S305中，在制作了力感应层的液晶面板的下表面依次设置下偏光板、背光源以及背光金属铁框，其中背光金属铁框与背光源具有设定间隙；这样力感应层和背光金属铁框可形成力感应电容。随后转到步骤S306。
在步骤S306中，设置液晶面板的显示驱动电路以及力感应层的压力感应驱动电路。如使用柔性电路板（FPC，Flexible Printed Circuit）将力感应层的力感应电极与外部的力感应芯片连接起来，使用柔性电路板将液晶面板的像素电极与外部的显示驱动芯片连接起来。
这样即完成了本优选实施例的压力触控液晶显示面板的制作过程。该压力触控液晶显示面板的具体使用方式请参照上述的压力触控液晶显示面板的优选实施例中的相关描述。
本发明的压力触控液晶显示面板及制作方法通过在液晶面板下表面设置力感应层，可进一步减小压力触控液晶显示面板的厚度，且压力触控液晶显示面板的整体制作成本较低；解决了现有的压力触控液晶显示面板及制作方法的整体厚度较大且制作成本较高的技术问题。
综上所述，虽然本发明已以优选实施例揭露如上，但上述优选实施例并非用以限制本发明，本领域的普通技术人员，在不脱离本发明的精神和范围内，均可作各种更动与润饰，因此本发明的保护范围以权利要求界定的范围为准。

Claims (17)

  1. 一种压力触控液晶显示面板，其包括：
    液晶面板，
    上偏光板，设置在所述液晶面板的上表面；用于过滤设定偏振态的偏振光；
    触摸屏，设置在所述上偏光板的上表面，用于接收触控信号；
    力感应层，设置在所述液晶面板的下表面，作为力感应电容的第一基板；
    下偏光板，设置在所述力感应层的下表面，用于过滤设定偏振态的偏振光；
    背光源，设置在所述下偏光板的下表面，用于提供显示光源；以及
    背光金属铁框，设置在所述背光源的外侧，与所述背光源具有设定间隙，作为力感应电容的第二基板；
    其中所述力感应层为透明导电层；所述背光金属铁框与所述力感应层的间隙为0.1mm至2mm。
  2. 根据权利要求1所述压力触控液晶显示面板，其中所述力感应层的厚度为30nm至100nm。
  3. 根据权利要求1所述压力触控液晶显示面板，其中通过溅镀的方式在所述液晶面板的下表面形成所述力感应层。
  4. 根据权利要求1所述压力触控液晶显示面板，其中所述力感应层和所述背光金属铁框形成力感应电容。
  5. 一种压力触控液晶显示面板，其包括：
    液晶面板，
    上偏光板，设置在所述液晶面板的上表面；用于过滤设定偏振态的偏振光；
    触摸屏，设置在所述上偏光板的上表面，用于接收触控信号；
    力感应层，设置在所述液晶面板的下表面，作为力感应电容的第一基板；
    下偏光板，设置在所述力感应层的下表面，用于过滤设定偏振态的偏振光；
    背光源，设置在所述下偏光板的下表面，用于提供显示光源；以及
    背光金属铁框，设置在所述背光源的外侧，与所述背光源具有设定间隙，作为力感应电容的第二基板。
  6. 根据权利要求5所述的压力触控液晶显示面板，其中所述力感应层为透明导电层。
  7. 根据权利要求5所述的压力触控液晶显示面板，其中所述背光金属铁框与所述力感应层的间隙为0.1mm至2mm。
  8. 根据权利要求5所述的压力触控液晶显示面板，其中所述力感应层的厚度为30nm至100nm。
  9. 根据权利要求6所述的压力触控液晶显示面板，其中通过溅镀的方式在所述液晶面板的下表面形成所述力感应层。
  10. 根据权利要求5所述的压力触控液晶显示面板，其中所述力感应层和所述背光金属铁框形成力感应电容。
  11. 一种压力触控液晶显示面板的制作方法，其包括：
    提供一液晶面板；
    在所述液晶面板的下表面形成一透明导电层；
    对所述透明导电层进行图形化处理，形成力感应层；
    在所述液晶面板的上表面依次设置上偏光板以及触摸屏；以及
    在所述液晶面板的下表面依次设置下偏光板、背光源以及背光金属铁框，其中所述背光金属铁框与所述背光源具有设定间隙。
  12. 根据权利要求11所述的压力触控液晶显示面板的制作方法，其中所述在所述液晶面板的下表面依次设置下偏光板、背光源以及背光金属铁框的步骤之后还包括步骤：
    设置所述液晶面板的显示驱动电路以及所述力感应层的压力感应驱动电路。
  13. 根据权利要求11所述的压力触控液晶显示面板的制作方法，其中所述力感应层和所述背光金属铁框形成力感应电容。
  14. 根据权利要求11所述的压力触控液晶显示面板的制作方法，其中所述力感应层为透明导电层。
  15. 根据权利要求14所述的压力触控液晶显示面板的制作方法，其中通过溅镀的方式在所述液晶面板的下表面形成所述力感应层。
  16. 根据权利要求11所述的压力触控液晶显示面板的制作方法，其中所述力感应层的厚度为30nm至100nm。
  17. 根据权利要求11所述的压力触控液晶显示面板的制作方法，其中所述背光金属铁框与所述力感应层的间隙为0.1mm至2mm。
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