WO2017201799A1 - 压力触控显示装置 - Google Patents

压力触控显示装置 Download PDF

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Publication number
WO2017201799A1
WO2017201799A1 PCT/CN2016/087322 CN2016087322W WO2017201799A1 WO 2017201799 A1 WO2017201799 A1 WO 2017201799A1 CN 2016087322 W CN2016087322 W CN 2016087322W WO 2017201799 A1 WO2017201799 A1 WO 2017201799A1
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WO
WIPO (PCT)
Prior art keywords
pressure
backlight module
pressure sensor
shielding layer
display device
Prior art date
Application number
PCT/CN2016/087322
Other languages
English (en)
French (fr)
Inventor
黄耀立
张红森
贺兴龙
Original Assignee
武汉华星光电技术有限公司
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Application filed by 武汉华星光电技术有限公司 filed Critical 武汉华星光电技术有限公司
Priority to US15/122,408 priority Critical patent/US10372252B2/en
Publication of WO2017201799A1 publication Critical patent/WO2017201799A1/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
    • G06F3/0412—Digitisers structurally integrated in a display
    • 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
    • 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
    • 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
    • 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
    • G06F3/046—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by electromagnetic 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
    • 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
    • G02F1/133334—Electromagnetic shields
    • 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
    • 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

Definitions

  • the present invention relates to the field of touch display technologies, and in particular, to a pressure touch display device.
  • the pressure touch (Force Touch) technology mainly uses the pressure sensor (Force Sensor) to sense the pressure change amount according to the deformation of the user's finger pressing the display surface of the mobile phone, thereby implementing the pressure touch; according to the pressure sensing principle, Pressure touch technology can be mainly divided into three categories: piezoelectric, piezoresistive, and capacitive; piezoresistive touch technology is simple in design and lowest in cost, but because piezoresistive touch technology is subject to its physical limitations, such as The mobile phone processor burden caused by the low light transmission rate and the large detection area of the high number of lines, and the piezoresistive touch technology needs to maintain the power supply state, increase the power consumption of the mobile phone, and also cause the aging itself to affect the service life, so It is gradually eliminated; the piezoelectric touch technology completes the touch through voltage driving, and the driving method is similar to the driving method of the liquid crystal display panel, but since it also has the disadvantage of the piezoresistive touch technology, the manufacturing process in the field of mobile phones Not mature enough
  • Capacitive pressure touch technology is widely used due to mature technology, high yield and low cost.
  • the main implementation of capacitive pressure touch technology is to attach the pressure sensor to the mobile phone middle frame or mobile phone liquid crystal display module (LCM).
  • the back side as shown in FIGS. 1A-1C, is mainly attached to the middle frame 140 of the mobile phone (as shown in FIG. 1B) and the backlight attached to the mobile phone according to the position where the pressure sensor 130 is attached.
  • the lower surface of the bottom frame 1210 of the black light (BL) (as shown in FIG. 1A) or the upper surface of the bottom frame 1210 of the backlight module of the mobile phone (as shown in FIG.
  • An object of the present invention is to provide a pressure touch display device, wherein the pressure sensing result is not interfered by the noise electromagnetic signal, and the touch sensitivity is high.
  • the present invention firstly provides a pressure touch display device, comprising: a liquid crystal display panel, a backlight module disposed under the liquid crystal display panel, and a backlight module bottom frame disposed under the backlight module a shielding layer disposed under the bottom frame of the backlight module, a pressure sensor disposed under the shielding layer, and a middle frame disposed under the pressure sensor;
  • the shielding layer is a conductive material
  • a gap is formed between the pressure sensor and the middle frame to form a capacitance between the pressure sensor and the middle frame;
  • the pressure sensor senses a pressure applied to the pressure touch display device by sensing a change in capacitance between the pressure sensor and the middle frame, and the shielding layer is used to shield the noise electromagnetic signal from the liquid crystal display panel to prevent The noise electromagnetic signal interferes with the pressure sensing result of the pressure sensor.
  • the shielding layer is a full-face conductive film or a conductive film with a plurality of hollow patterns.
  • the material of the shielding layer is metal
  • the material of the bottom frame of the backlight module is metal or non-metal
  • the material of the middle frame is metal.
  • the present invention also provides a pressure touch display device, comprising: a liquid crystal display panel, a backlight module disposed under the liquid crystal display panel, a shielding layer disposed under the backlight module, and disposed at the a bottom frame of the backlight module under the shielding layer, a pressure sensor disposed under the bottom frame of the backlight module, and a middle frame disposed under the pressure sensor;
  • the shielding layer is a conductive material
  • a gap is formed between the pressure sensor and the bottom frame of the backlight module to form a capacitance between the pressure sensor and the bottom frame of the backlight module;
  • the pressure sensor senses a pressure applied to the pressure touch display device by sensing a change in capacitance between the pressure sensor and the bottom frame of the backlight module, and the shielding layer is used to shield the noise electromagnetic from the liquid crystal display panel.
  • the signal prevents the noise electromagnetic signal from interfering with the pressure sensing result of the pressure sensor.
  • the shielding layer is a full-face conductive film or a conductive film with a plurality of hollow patterns.
  • the material of the shielding layer is metal
  • the material of the bottom frame of the backlight module is metal
  • the material of the middle frame is metal.
  • the present invention further provides another pressure touch display device, comprising: a liquid crystal display panel, a backlight module disposed under the liquid crystal display panel, a pressure sensor disposed under the backlight module, and the pressure sensor a lower shielding layer, a backlight module bottom frame disposed under the shielding layer, and a middle frame disposed under the bottom frame of the backlight module;
  • the shielding layer is a conductive material
  • a gap is formed between the pressure sensor and the backlight module to form a capacitance between the pressure sensor and the liquid crystal display panel;
  • the pressure sensor senses a pressure applied to the pressure touch display device by sensing a change in capacitance between the pressure sensor and the liquid crystal display panel
  • the shielding layer is configured to shield the noise electromagnetic signal and prevent the noise electromagnetic signal It interferes with the pressure sensing result of the pressure sensor and serves to isolate the middle frame.
  • the shielding layer is a full-face conductive film or a conductive film with a plurality of hollow patterns.
  • the material of the shielding layer is metal
  • the material of the bottom frame of the backlight module is metal or non-metal
  • the material of the middle frame is metal.
  • the present invention provides a pressure touch display device including: a liquid crystal display panel, a backlight module, a backlight module bottom frame, a shielding layer, a pressure sensor, and a middle frame, which are added inside the display device by
  • the shielding layer for shielding the electromagnetic signal of the noise can effectively reduce the interference caused by the noise electromagnetic signal inside the pressure touch display device to the pressure sensing result of the pressure sensor compared with the existing pressure touch display device, so that the pressure The touch sensitivity of the touch display device is improved.
  • FIG. 1A is a schematic structural view of a first pressure touch display device of the prior art
  • 1B is a schematic structural view of a conventional second pressure touch display device
  • 1C is a schematic structural view of a third pressure touch display device of the prior art
  • FIG. 2 is a schematic structural view of a first embodiment of a pressure touch display device according to the present invention.
  • FIG. 3 is a schematic structural view of a second embodiment of a pressure touch display device according to the present invention.
  • FIG. 4 is a schematic structural view of a third embodiment of a pressure touch display device according to the present invention.
  • 5A is a schematic view showing a structure of a shielding layer in a pressure touch display device according to the present invention.
  • 5B is a schematic view showing another structure of a shielding layer in the pressure touch display device of the present invention.
  • FIG. 5C is a schematic diagram showing still another structure of the shielding layer in the pressure touch display device of the present invention.
  • the present invention provides a pressure touch display device, including: a liquid crystal display panel 11 , a backlight module 12 disposed under the liquid crystal display panel 11 , and a backlight module disposed under the backlight module 12 .
  • the shielding layer 2 is a conductive material
  • a gap is formed between the pressure sensor 13 and the middle frame 14 to form a capacitance between the pressure sensor 13 and the middle frame 14;
  • the pressure sensor 13 senses the pressure applied to the pressure touch display device by sensing a change in capacitance between the pressure sensor 13 and the middle frame 14.
  • the liquid crystal display panel 11 and the backlight module 12 are deformed, and the pressure sensor 13 is attached to the backlight module 12 .
  • the pressure sensor 13 is deformed in conformity with the liquid crystal display panel 11 and the backlight module 12, and the gap width between the pressure sensor 13 and the middle frame 14 is changed, thereby changing the capacitance between the pressure sensor 13 and the middle frame 14.
  • the pressure sensor 13 senses the changed capacitance to obtain a pressure applied to the pressure touch display device to realize the pressure sensing function.
  • the shielding layer 2 is a conductive material and has a function of shielding a noise electromagnetic signal.
  • the shielding layer 2 is disposed between the lower surface of the backlight module bottom frame 121 and the pressure sensor 13 and can be used for shielding from the shielding layer.
  • the noise electromagnetic signal of the liquid crystal display panel 11 prevents the noise electromagnetic signal from interfering with the pressure sensing result of the pressure sensor 13, and can effectively improve the touch sensitivity of the pressure touch display device.
  • the material of the shielding layer 2 is metal.
  • the shielding layer 2 may be a full-surface conductive film (as shown in FIG. 5A) or a conductive film with a plurality of hollow patterns 21 (as shown in FIGS. 5B-5C). .
  • the conductive film with a plurality of hollow patterns 21 can save the raw materials and cost while achieving the same shielding noise electromagnetic signal.
  • the shape of the hollow pattern 21 may be various patterns such as a rectangle, a diamond, or a circle.
  • the plurality of hollow patterns 21 are arranged in a matrix such that the conductive film with the plurality of hollow patterns 21 has a grid shape.
  • the material of the backlight module bottom frame 121 is metal or non-metal.
  • the shielding layer 2 performs the function of shielding the electromagnetic signal from the liquid crystal display panel 11; when the material of the backlight module bottom frame 121 is metal, the backlight The module bottom frame 121 can function as a shielding layer to shield the noise electromagnetic signals from the liquid crystal display panel 11 or perform the function of shielding the noise electromagnetic signals from the liquid crystal display panel 11 together with the shielding layer 2 attached thereto.
  • the metal material is preferably iron.
  • the material of the middle frame 14 is metal.
  • the middle frame 14 is used for providing support and protection for components such as the liquid crystal display panel 11, the backlight module 12, the backlight module bottom frame 121, the shielding layer 2, and the pressure sensor 13.
  • the pressure touch display device senses a pressure applied to the pressure touch display device by sensing a change in capacitance between the pressure sensor 13 and the middle frame 14 through the pressure sensor 13 and the backlight module bottom frame 121.
  • a shielding layer 2 having a shielding noise electromagnetic signal is disposed between the surfaces, and the pressure sensing result of the noise electromagnetic signal inside the pressure touch display device can be effectively reduced compared with the existing pressure touch display device. The resulting interference increases the touch sensitivity of the pressure touch display device.
  • the present invention provides another pressure touch display device, including: a liquid crystal display panel 11 , a backlight module 12 disposed under the liquid crystal display panel 11 , and a shielding disposed under the backlight module 12 .
  • a layer 2 a backlight module bottom frame 121 disposed under the shielding layer 2, a pressure sensor 13 disposed under the backlight module bottom frame 121, and a middle frame 14 disposed under the pressure sensor 13;
  • the shielding layer 2 is a conductive material
  • a gap is formed between the pressure sensor 13 and the backlight module bottom frame 121 to form a capacitance between the pressure sensor 13 and the backlight module bottom frame 121;
  • the pressure sensor 13 senses the pressure applied to the pressure touch display device by sensing a change in capacitance between the pressure sensor 13 and the backlight module bottom frame 121.
  • the liquid crystal display panel 11 when external pressure acts on the pressure touch display device from the liquid crystal display panel 11 side, the liquid crystal display panel 11 is deformed, and the backlight module 12 and the backlight module bottom frame 121 are deformed accordingly.
  • the capacitance between the blocks 121 changes, and the pressure sensor 13 senses the changed capacitance to obtain the pressure applied to the pressure touch display device to realize the pressure sensing function.
  • the shielding layer 2 is a conductive material and has a function of shielding a noise electromagnetic signal.
  • the shielding layer 2 is disposed between the upper surface of the backlight module bottom frame 121 and the backlight module 12, and can be used for shielding from the shielding layer.
  • the noise electromagnetic signal of the liquid crystal display panel 11 prevents the noise electromagnetic signal from interfering with the pressure sensing result of the pressure sensor 13, and can effectively improve the touch sensitivity of the pressure touch display device.
  • the material of the shielding layer 2 is metal.
  • the shielding layer 2 may be a full-surface conductive film (as shown in FIG. 5A) or a conductive film with a plurality of hollow patterns 21 (as shown in FIGS. 5B-5C). .
  • the conductive film with a plurality of hollow patterns 21 can save the raw materials and cost while achieving the same shielding noise electromagnetic signal.
  • the shape of the hollow pattern 21 may be various patterns such as a rectangle, a diamond, or a circle.
  • the plurality of hollow patterns 21 are arranged in a matrix such that the conductive film with the plurality of hollow patterns 21 has a grid shape.
  • the material of the backlight module bottom frame 121 is metal.
  • the material of the backlight module bottom frame 121 is metal, preferably iron.
  • the backlight module bottom frame 121 and the shielding layer 2 together function to shield the electromagnetic signal from the liquid crystal display panel 11 to enhance the shielding effect and improve the pressure touch display.
  • the touch sensitivity of the device is not limited.
  • the material of the middle frame 14 is metal.
  • the middle frame 14 is used for providing support and protection for components such as the liquid crystal display panel 11, the backlight module 12, the shielding layer 2, the backlight module bottom frame 121, and the pressure sensor 13.
  • the pressure touch display device senses the pressure applied to the pressure touch display device by sensing the capacitance change between the pressure sensor 13 and the backlight module bottom frame 121, and passes through the backlight module 12 and the backlight module bottom.
  • a shielding layer 2 having a shielding noise electromagnetic signal is disposed between the frames 121. Compared with the existing pressure touch display device, the pressure sensing of the pressure sensor by the noise electromagnetic signal inside the pressure touch display device can be effectively reduced. The resulting interference increases the touch sensitivity of the pressure touch display device.
  • the present invention provides a pressure touch display device, including: a liquid crystal display panel 11 , a backlight module 12 disposed under the liquid crystal display panel 11 , and a pressure disposed under the backlight module 12 .
  • a sensor 13 a shielding layer 2 disposed under the pressure sensor 13 , a backlight module bottom frame 121 disposed under the shielding layer 2 , and a middle frame 14 disposed under the backlight module bottom frame 121 ;
  • the shielding layer 2 is a conductive material
  • a gap is provided between the pressure sensor 13 and the backlight module 12 to make the pressure sensor Forming a capacitance between the liquid crystal display panel 11 and the liquid crystal display panel 11;
  • the pressure sensor 13 senses the pressure applied to the pressure touch display device by sensing a change in capacitance between the pressure sensor 13 and the liquid crystal display panel 11.
  • the liquid crystal display panel 11 and the backlight module 12 are deformed to make a gap between the pressure sensor 13 and the backlight module 12.
  • the width is changed to further change the capacitance between the pressure sensor 13 and the liquid crystal display panel 11, and the pressure sensor 13 senses the changed capacitance to obtain the pressure applied to the pressure touch display device to realize the pressure sensing function.
  • the shielding layer 2 is a conductive material and has a function of shielding a noise electromagnetic signal.
  • the shielding layer 2 is disposed between the upper surface of the backlight module bottom frame 121 and the pressure sensor 13 for shielding noise.
  • the electromagnetic signal prevents the noise electromagnetic signal from interfering with the pressure sensing result of the pressure sensor 13, and can effectively improve the touch sensitivity of the pressure touch display device; and at the same time, the shielding layer 2 can isolate the middle frame 14 to make the middle frame The capacitance between the 14 and the pressure sensor 13 does not change, and the touch sensitivity of the pressure touch display device can be further improved.
  • the material of the shielding layer 2 is metal.
  • the shielding layer 2 may be a full-surface conductive film (as shown in FIG. 5A) or a conductive film with a plurality of hollow patterns 21 (as shown in FIGS. 5B-5C). .
  • the conductive film with a plurality of hollow patterns 21 can save the raw materials and cost while achieving the same shielding noise electromagnetic signal.
  • the shape of the hollow pattern 21 may be various patterns such as a rectangle, a diamond, or a circle.
  • the plurality of hollow patterns 21 are arranged in a matrix such that the conductive film with the plurality of hollow patterns 21 has a grid shape.
  • the material of the backlight module bottom frame 121 is metal or non-metal.
  • the shielding layer 2 performs the function of shielding the noise electromagnetic signal and isolating the middle frame 14; when the material of the backlight module bottom frame 121 is metal
  • the backlight module bottom frame 121 can be used as a shielding layer to complete the function of shielding the electromagnetic signal of the noise, or together with the shielding layer 2 attached thereto to complete the function of shielding the electromagnetic signal of the noise.
  • the material of the backlight module bottom frame 121 is metal
  • the material of the backlight module bottom frame 121 is preferably iron.
  • the material of the middle frame 14 is metal.
  • the middle frame 14 is used for providing support and protection for components such as the liquid crystal display panel 11, the backlight module 12, the pressure sensor 13, the shielding layer 2, and the backlight module bottom frame 121.
  • the pressure touch display device senses the pressure applied to the pressure touch display device by sensing a change in capacitance between the pressure sensor 13 and the backlight module 12, and passes the pressure sensing Between the upper surface of the backlight module and the upper surface of the backlight module 121, a shielding layer 2 for shielding noise electromagnetic signals is disposed. Compared with the existing pressure touch display device, the noise inside the pressure touch display device can be effectively reduced. The interference caused by the electromagnetic signal to the pressure sensing result of the pressure sensor improves the touch sensitivity of the pressure touch display device.
  • the present invention provides a pressure touch display device including: a liquid crystal display panel, a backlight module, a backlight module bottom frame, a shielding layer, a pressure sensor, and a middle frame, which are provided with a shielding inside the display device.
  • the shielding layer of the noise electromagnetic signal can effectively reduce the interference caused by the noise electromagnetic signal inside the pressure touch display device to the pressure sensing result of the pressure sensor, and make the pressure touch The touch sensitivity of the control display device is improved.

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

Abstract

一种压力触控显示装置，包括：液晶显示面板(11)、背光模组(12)、背光模组底框(121)、屏蔽层(2)、压力传感器(13)及中框(14)，通过在显示装置内部添加具有屏蔽杂讯电磁信号作用的屏蔽层(2)，相比于现有的压力触控显示装置，能够有效减弱压力触控显示装置内部的杂讯电磁信号对压力传感器(13)的压力感测结果造成的干扰，使压力触控显示装置的触控灵敏度提高。

Description

压力触控显示装置 技术领域
本发明涉及触控显示技术领域，尤其涉及一种压力触控显示装置。
背景技术
随着智能手机的飞速发展，基本取代了传统的非智能手机，手机屏幕的尺寸也越来越大，手机的操作模式也从传统的按键操作模式向触控操作模式转变，随之而来是压力触控技术的迅速发展。
压力触控(Force Touch)技术主要根据用户手指按压手机显示屏幕表面产生的形变，利用压力传感器(Force Sensor)来感测压力变化量的大小，进而实现压力触控；根据压力感测原理不同，压力触控技术主要可分为三类：压电式、压阻式、电容式；压阻式触控技术设计简单，成本最低，但由于压阻式触控技术受制于其物理局限性，如透光率较低、高线数的大侦测面积造成的手机处理器负担，并且压阻式触控技术需要保持通电状态，增加手机耗电量，也使本身容易老化而影响使用寿命，所以被逐渐淘汰；压电式触控技术通过电压驱动来完成触控，驱动方式类似于液晶显示面板的驱动方式，但由于自身也具有压阻式触控技术的缺点，在手机领域中的制作工艺不够成熟，也未被广泛使用。
电容式压力触控技术因工艺成熟、良品率高及成本较低而被广泛使用，电容式压力触控技术主要实现方式是将压力传感器紧贴于手机中框或手机液晶显示模组(LCM)背面，如图1A-1C所示，根据压力传感器130贴附的位置不同，主要有三种贴附方式：贴附于手机的中框140上(如图1B所示)、贴附于手机的背光模组(Black Light，BL)底框1210的下表面(如图1A所示)或者贴附于手机的背光模组底框1210的上表面(如图1C所示)，以上三种方法虽然可以实现电容式压力触控的效果，但是由于手机内部会有其他各种电磁信号，大部分电信号对于压力传感器来说都属于杂讯电磁信号，会对压力传感器的压力感测结果造成干扰，降低压力触控的灵敏度，影响用户的体验效果。
发明内容
本发明的目的在于提供一种压力触控显示装置，其压力感测结果不受杂讯电磁信号干扰，触控灵敏度高。
为实现上述目的，本发明首先提供一种压力触控显示装置，包括：液晶显示面板、设于所述液晶显示面板下方的背光模组、设于所述背光模组下方的背光模组底框、设于所述背光模组底框下方的屏蔽层、设于所述屏蔽层下方的压力传感器及设于所述压力传感器下方的中框；
所述屏蔽层为导电材料；
所述压力传感器与中框之间设有间隙，使所述压力传感器与中框之间形成电容；
所述压力传感器通过感测压力传感器与中框之间的电容变化对施加到压力触控显示装置上的压力进行感测，所述屏蔽层用于屏蔽来自液晶显示面板的杂讯电磁信号，防止杂讯电磁信号对压力传感器的压力感测结果造成干扰。
所述屏蔽层为一整面的导电薄膜或者带多个镂空图案的导电薄膜。
所述屏蔽层的材料为金属；
所述背光模组底框的材料为金属或非金属；
所述中框的材料为金属。
本发明还提供一种压力触控显示装置，其特征在于，包括：液晶显示面板、设于所述液晶显示面板下方的背光模组、设于所述背光模组下方的屏蔽层、设于所述屏蔽层下方的背光模组底框、设于所述背光模组底框下方的压力传感器及设于所述压力传感器下方的中框；
所述屏蔽层为导电材料；
所述压力传感器与背光模组底框之间设有间隙，使所述压力传感器与背光模组底框之间形成电容；
所述压力传感器通过感测压力传感器与背光模组底框之间的电容变化对施加到压力触控显示装置上的压力进行感测，所述屏蔽层用于屏蔽来自液晶显示面板的杂讯电磁信号，防止杂讯电磁信号对压力传感器的压力感测结果造成干扰。
所述屏蔽层为一整面的导电薄膜或者带多个镂空图案的导电薄膜。
所述屏蔽层的材料为金属；
所述背光模组底框的材料为金属；
所述中框的材料为金属。
本发明还提供另一种压力触控显示装置，包括：液晶显示面板、设于所述液晶显示面板下方的背光模组、设于所述背光模组下方的压力传感器、设于所述压力传感器下方的屏蔽层、设于所述屏蔽层下方的背光模组底框及设于所述背光模组底框下方的中框；
所述屏蔽层为导电材料；
所述压力传感器与背光模组之间设有间隙，使所述压力传感器与液晶显示面板之间形成电容；
所述压力传感器通过感测压力传感器与液晶显示面板之间的电容变化对施加到压力触控显示装置上的压力进行感测，所述屏蔽层用于屏蔽杂讯电磁信号，防止杂讯电磁信号对压力传感器的压力感测结果造成干扰，同时起到隔离中框的作用。
所述屏蔽层为一整面的导电薄膜或者带多个镂空图案的导电薄膜。
所述屏蔽层的材料为金属；
所述背光模组底框的材料为金属或者非金属；
所述中框的材料为金属。
本发明的有益效果：本发明提供的一种压力触控显示装置，包括：液晶显示面板、背光模组、背光模组底框、屏蔽层、压力传感器及中框，通过在显示装置内部添加具有屏蔽杂讯电磁信号作用的屏蔽层，相比于现有的压力触控显示装置，能够有效减弱压力触控显示装置内部的杂讯电磁信号对压力传感器的压力感测结果造成的干扰，使压力触控显示装置的触控灵敏度提高。
附图说明
为了能更进一步了解本发明的特征以及技术内容，请参阅以下有关本发明的详细说明与附图，然而附图仅提供参考与说明用，并非用来对本发明加以限制。
附图中，
图1A为现有的第一种压力触控显示装置的结构示意图；
图1B为现有的第二种压力触控显示装置的结构示意图；
图1C为现有的第三种压力触控显示装置的结构示意图；
图2为本发明的压力触控显示装置的第一实施例的结构示意图；
图3为本发明的压力触控显示装置的第二实施例的结构示意图；
图4为本发明的压力触控显示装置的第三实施例的结构示意图；
图5A为本发明的压力触控显示装置中的屏蔽层的一种结构的示意图；
图5B为本发明的压力触控显示装置中的屏蔽层的另一种结构的示意图；
图5C为本发明的压力触控显示装置中的屏蔽层的又一种结构的示意图。
具体实施方式
为更进一步阐述本发明所采取的技术手段及其效果，以下结合本发明的优选实施例及其附图进行详细描述。
请参阅图2，本发明提供一种压力触控显示装置，包括：液晶显示面板11、设于所述液晶显示面板11下方的背光模组12、设于所述背光模组12下方的背光模组底框121、设于所述背光模组底框121下方的屏蔽层2、设于所述屏蔽层2下方的压力传感器13、设于所述压力传感器13下方的中框14；
所述屏蔽层2为导电材料；
所述压力传感器13与中框14之间设有间隙，使所述压力传感器13与中框14之间形成电容；
所述压力传感器13通过感测压力传感器13与中框14之间的电容变化对施加到压力触控显示装置上的压力进行感测。
具体的，当有外部压力从液晶显示面板11一侧作用在该压力触控显示装置上时，液晶显示面板11及背光模组12会产生形变，由于压力传感器13贴附在背光模组12的下方，使压力传感器13产生同液晶显示面板11及背光模组12一致的形变，改变压力传感器13与中框14之间的间隙宽度，进而使压力传感器13与中框14之间的电容发生变化，压力传感器13对变化的电容进行感测，得出施加在压力触控显示装置上的压力，实现压力感测功能。
需要说明的是，所述屏蔽层2为导电材料，具有屏蔽杂讯电磁信号的作用，该屏蔽层2设于背光模组底框121的下表面与压力传感器13之间，能够用于屏蔽来自液晶显示面板11的杂讯电磁信号，防止杂讯电磁信号对压力传感器13的压力感测结果造成干扰，能够有效地提升压力触控显示装置的触控灵敏度。
优选的，所述屏蔽层2的材料为金属。
进一步的，请参阅图5A至图5C，所述屏蔽层2可以为一整面的导电薄膜(如图5A所示)或者带多个镂空图案21的导电薄膜(如图5B-5C所示)。与一整面的导电薄膜相比，带多个镂空图案21的导电薄膜能够在实现相同的屏蔽杂讯电磁信号作用的同时，节约原料及成本。
进一步的，所述镂空图案21的形状可以为矩形、菱形或圆形等各种图案。优选的，所述带多个镂空图案21的导电薄膜中，多个镂空图案21呈矩阵排列，使得所述带多个镂空图案21的导电薄膜呈网格状。
具体的，所述背光模组底框121的材料为金属或者非金属。
特别的，当背光模组底框121的材料为非金属时，由屏蔽层2完成屏蔽来自液晶显示面板11的杂讯电磁信号的功能；当背光模组底框121的材料为金属时，背光模组底框121可作为屏蔽层完成屏蔽来自液晶显示面板11的杂讯电磁信号的功能，或与贴附其上的屏蔽层2共同完成屏蔽来自液晶显示面板11的杂讯电磁信号的功能。
进一步的，所述背光模组底框121的材料为金属时，所述金属材料优选为铁。
具体的，所述中框14的材料为金属。
具体的，所述中框14用于对其上的液晶显示面板11、背光模组12、背光模组底框121、屏蔽层2、及压力传感器13等组件提供支撑和保护。
上述压力触控显示装置，通过感测压力传感器13与中框14之间的电容变化对施加到压力触控显示装置上的压力进行感测，通过在压力传感器13与背光模组底框121下表面之间设置具有屏蔽杂讯电磁信号作用的屏蔽层2，相比于现有的压力触控显示装置，能够有效减弱压力触控显示装置内部的杂讯电磁信号对压力传感器的压力感测结果造成的干扰，使压力触控显示装置的触控灵敏度提高。
请参阅图3，本发明提供另一种压力触控显示装置，包括：液晶显示面板11、设于所述液晶显示面板11下方的背光模组12、设于所述背光模组12下方的屏蔽层2、设于所述屏蔽层2下方的背光模组底框121、设于所述背光模组底框121下方的压力传感器13、设于所述压力传感器13下方的中框14；
所述屏蔽层2为导电材料；
所述压力传感器13与背光模组底框121之间设有间隙，使所述压力传感器13与背光模组底框121之间形成电容；
所述压力传感器13通过感测压力传感器13与背光模组底框121之间的电容变化对施加到压力触控显示装置上的压力进行感测。
具体的，当有外部压力从液晶显示面板11一侧作用在该压力触控显示装置上时，液晶显示面板11会产生形变，背光模组12及背光模组底框121随之发生形变，由于压力传感器13与背光模组底框121之间有间隙，压力传感器13不发生形变，使压力传感器13与背光模组底框121之间的间隙宽度改变，进而使压力传感器13与背光模组底框121之间的电容发生变化，压力传感器13对变化的电容进行感测，得出施加在压力触控显示装置上的压力，实现压力感测功能。
需要说明的是，所述屏蔽层2为导电材料，具有屏蔽杂讯电磁信号的作用，该屏蔽层2设于背光模组底框121上表面与背光模组12之间，能够用于屏蔽来自液晶显示面板11的杂讯电磁信号，防止杂讯电磁信号对压力传感器13的压力感测结果造成干扰，能够有效地提升压力触控显示装置的触控灵敏度。
优选的，所述屏蔽层2的材料为金属。
进一步的，请参阅图5A至图5C，所述屏蔽层2可以为一整面的导电薄膜(如图5A所示)或者带多个镂空图案21的导电薄膜(如图5B-5C所示)。与一整面的导电薄膜相比，带多个镂空图案21的导电薄膜能够在实现相同的屏蔽杂讯电磁信号作用的同时，节约原料及成本。
进一步的，所述镂空图案21的形状可以为矩形、菱形或圆形等各种图案。优选的，所述带多个镂空图案21的导电薄膜中，多个镂空图案21呈矩阵排列，使得所述带多个镂空图案21的导电薄膜呈网格状。具体的，所述背光模组底框121的材料为金属。
优选的，所述背光模组底框121的材料为金属，优选为铁。
特别的，在上述压力触控显示装置中，所述背光模组底框121与屏蔽层2共同起到屏蔽来自液晶显示面板11的杂讯电磁信号的作用，增强屏蔽效果，提高压力触控显示装置的触控灵敏度。
具体的，所述中框14的材料为金属。
具体的，所述中框14用于对其上的液晶显示面板11、背光模组12、屏蔽层2、背光模组底框121、及压力传感器13等组件提供支撑和保护。
上述压力触控显示装置，通过感测压力传感器13与背光模组底框121间的电容变化对施加到压力触控显示装置上的压力进行感测，通过在背光模组12与背光模组底框121之间设置具有屏蔽杂讯电磁信号作用的屏蔽层2，相比于现有的压力触控显示装置，能够有效减弱压力触控显示装置内部的杂讯电磁信号对压力传感器的压力感测结果造成的干扰，使压力触控显示装置的触控灵敏度提高。
请参阅图4，本发明提供又一种压力触控显示装置，包括：液晶显示面板11、设于所述液晶显示面板11下方的背光模组12、设于所述背光模组12下方的压力传感器13、设于所述压力传感器13下方的屏蔽层2、设于所述屏蔽层2下方的背光模组底框121、设于所述背光模组底框121下方的中框14；
所述屏蔽层2为导电材料；
所述压力传感器13与背光模组12之间设有间隙，使所述压力传感器 13与液晶显示面板11之间形成电容；
所述压力传感器13通过感测压力传感器13与液晶显示面板11之间的电容变化对施加到压力触控显示装置上的压力进行感测。
具体的，当有外部压力从液晶显示面板11一侧作用在该压力触控显示装置上时，液晶显示面板11及背光模组12会产生形变，使压力传感器13与背光模组12之的间隙宽度改变，进而使压力传感器13与液晶显示面板11之间的电容发生变化，压力传感器13对变化的电容进行感测，得出施加在压力触控显示装置上的压力，实现压力感测功能。
需要说明的是，所述屏蔽层2为导电材料，具有屏蔽杂讯电磁信号的作用，该屏蔽层2设于背光模组底框121的上表面与压力传感器13之间，用于屏蔽杂讯电磁信号，防止杂讯电磁信号对压力传感器13的压力感测结果造成干扰，能够有效地提升压力触控显示装置的触控灵敏度；同时由于屏蔽层2能够对中框14进行隔离，使中框14与压力传感器13之间的电容不发生改变，可进一步提升压力触控显示装置的触控灵敏度。
优选的，所述屏蔽层2的材料为金属。
进一步的，请参阅图5A至图5C，所述屏蔽层2可以为一整面的导电薄膜(如图5A所示)或者带多个镂空图案21的导电薄膜(如图5B-5C所示)。与一整面的导电薄膜相比，带多个镂空图案21的导电薄膜能够在实现相同的屏蔽杂讯电磁信号作用的同时，节约原料及成本。
进一步的，所述镂空图案21的形状可以为矩形、菱形或圆形等各种图案。优选的，所述带多个镂空图案21的导电薄膜中，多个镂空图案21呈矩阵排列，使得所述带多个镂空图案21的导电薄膜呈网格状。
具体的，所述背光模组底框121的材料为金属或非金属。
特别的，当所述背光模组底框121的材料为非金属时，由屏蔽层2完成屏蔽杂讯电磁信号、及隔离中框14的功能；当背光模组底框121的材料为金属时，背光模组底框121可作为屏蔽层完成屏蔽杂讯电磁信号的功能，或与贴附其上的屏蔽层2共同完成屏蔽杂讯电磁信号的功能。
进一步的，所述背光模组底框121的材料为金属时，所述背光模组底框121的材料优选为铁。
具体的，所述中框14的材料为金属。
具体的，所述中框14用于对其上的液晶显示面板11、背光模组12、压力传感器13、屏蔽层2、及背光模组底框121等组件提供支撑和保护。
上述压力触控显示装置，通过感测压力传感器13与背光模组12间的电容变化对施加到压力触控显示装置上的压力进行感测，通过在压力传感 器13与背光模组底框121上表面之间设置具有屏蔽杂讯电磁信号作用的屏蔽层2，相比于现有的压力触控显示装置，能够有效减弱压力触控显示装置内部的杂讯电磁信号对压力传感器的压力感测结果造成的干扰，使压力触控显示装置的触控灵敏度提高。
综上所述，本发明提供的一种压力触控显示装置，包括：液晶显示面板、背光模组、背光模组底框、屏蔽层、压力传感器及中框，通过在显示装置内部添加具有屏蔽杂讯电磁信号作用的屏蔽层，相比于现有的压力触控显示装置，能够有效减弱压力触控显示装置内部的杂讯电磁信号对压力传感器的压力感测结果造成的干扰，使压力触控显示装置的触控灵敏度提高。
以上所述，对于本领域的普通技术人员来说，可以根据本发明的技术方案和技术构思作出其他各种相应的改变和变形，而所有这些改变和变形都应属于本发明后附的权利要求的保护范围。

Claims (9)

  1. 一种压力触控显示装置，包括：液晶显示面板、设于所述液晶显示面板下方的背光模组、设于所述背光模组下方的背光模组底框、设于所述背光模组底框下方的屏蔽层、设于所述屏蔽层下方的压力传感器及设于所述压力传感器下方的中框；
    所述屏蔽层为导电材料；
    所述压力传感器与中框之间设有间隙，使所述压力传感器与中框之间形成电容；
    所述压力传感器通过感测压力传感器与中框之间的电容变化对施加到压力触控显示装置上的压力进行感测，所述屏蔽层用于屏蔽来自液晶显示面板的杂讯电磁信号，防止杂讯电磁信号对压力传感器的压力感测结果造成干扰。
  2. 如权利要求1所述的压力触控显示装置，其中，所述屏蔽层为一整面的导电薄膜或者带多个镂空图案的导电薄膜。
  3. 如权利要求1所述的压力触控显示装置，其中，所述屏蔽层的材料为金属；
    所述背光模组底框的材料为金属或非金属；
    所述中框的材料为金属。
  4. 一种压力触控显示装置，包括：液晶显示面板、设于所述液晶显示面板下方的背光模组、设于所述背光模组下方的屏蔽层、设于所述屏蔽层下方的背光模组底框、设于所述背光模组底框下方的压力传感器及设于所述压力传感器下方的中框；
    所述屏蔽层为导电材料；
    所述压力传感器与背光模组底框之间设有间隙，使所述压力传感器与背光模组底框之间形成电容；
    所述压力传感器通过感测压力传感器与背光模组底框之间的电容变化对施加到压力触控显示装置上的压力进行感测，所述屏蔽层用于屏蔽来自液晶显示面板的杂讯电磁信号，防止杂讯电磁信号对压力传感器的压力感测结果造成干扰。
  5. 如权利要求4所述的压力触控显示装置，其中，所述屏蔽层为一整面的导电薄膜或者带多个镂空图案的导电薄膜。
  6. 如权利要求4所述的压力触控显示装置，其中，所述屏蔽层的材料 为金属；
    所述背光模组底框的材料为金属；
    所述中框的材料为金属。
  7. 一种压力触控显示装置，包括：液晶显示面板、设于所述液晶显示面板下方的背光模组、设于所述背光模组下方的压力传感器、设于所述压力传感器下方的屏蔽层、设于所述屏蔽层下方的背光模组底框及设于所述背光模组底框下方的中框；
    所述屏蔽层为导电材料；
    所述压力传感器与背光模组之间设有间隙，使所述压力传感器与液晶显示面板之间形成电容；
    所述压力传感器通过感测压力传感器与液晶显示面板之间的电容变化对施加到压力触控显示装置上的压力进行感测，所述屏蔽层用于屏蔽杂讯电磁信号，防止杂讯电磁信号对压力传感器的压力感测结果造成干扰，同时起到隔离中框的作用。
  8. 如权利要求7所述的压力触控显示装置，其中，所述屏蔽层为一整面的导电薄膜或者带多个镂空图案的导电薄膜。
  9. 如权利要求7所述的压力触控显示装置，其中，所述屏蔽层的材料为金属；
    所述背光模组底框的材料为金属或者非金属；
    所述中框的材料为金属。
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