WO2018040717A1 - 触控显示面板及其驱动方法以及触控显示装置 - Google Patents

触控显示面板及其驱动方法以及触控显示装置 Download PDF

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Publication number
WO2018040717A1
WO2018040717A1 PCT/CN2017/091141 CN2017091141W WO2018040717A1 WO 2018040717 A1 WO2018040717 A1 WO 2018040717A1 CN 2017091141 W CN2017091141 W CN 2017091141W WO 2018040717 A1 WO2018040717 A1 WO 2018040717A1
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WIPO (PCT)
Prior art keywords
display panel
touch
pressure
electrode
pressure touch
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PCT/CN2017/091141
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English (en)
French (fr)
Inventor
许睿
董学
王海生
吴俊纬
刘英明
丁小梁
李昌峰
王鹏鹏
刘伟
郭玉珍
Original Assignee
京东方科技集团股份有限公司
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Priority to US15/748,479 priority Critical patent/US10579173B2/en
Publication of WO2018040717A1 publication Critical patent/WO2018040717A1/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
    • G06F3/044—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
    • G06F3/0414—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
    • G06F3/0412—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
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • 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
    • 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
    • G06F3/047—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using sets of wires, e.g. crossed wires
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier
    • H01L27/12—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being other than a semiconductor body, e.g. an insulating body
    • H01L27/1214—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
    • H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/40—OLEDs integrated with touch screens
    • 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
    • G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G09G2300/0809—Several active elements per pixel in active matrix panels
    • G09G2300/0819—Several active elements per pixel in active matrix panels used for counteracting undesired variations, e.g. feedback or autozeroing
    • 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
    • G09G3/22—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 using controlled light sources
    • G09G3/30—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 using controlled light sources using electroluminescent panels
    • G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3225—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier
    • H01L27/12—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being other than a semiconductor body, e.g. an insulating body
    • H01L27/1214—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
    • H01L27/124—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs with a particular composition, shape or layout of the wiring layers specially adapted to the circuit arrangement, e.g. scanning lines in LCD pixel circuits

Definitions

  • Embodiments of the present disclosure relate to a touch display panel, a touch display device, and a method of driving the touch display panel.
  • OLED Organic Light Emitting Diode
  • LCDs liquid crystal displays
  • OLED displays have the advantages of low power consumption, low production cost, self-illumination, wide viewing angle and fast response.
  • Organic Light Emitting Diode (OLED) displays have become more and more popular in display fields such as mobile phones, PDAs, and digital cameras.
  • Pressure sensing technology refers to the technology that can be sensed or measured by external forces. Many vendors are looking for the right technology to achieve pressure sensing in the display field, especially in mobile phones or tablets, so that users get a better and richer human-computer interaction experience.
  • Embodiments of the present disclosure provide a touch display panel, a driving method thereof, and a touch display device.
  • the touch display panel comprises: a conductive structure and a display panel.
  • the display panel is disposed on the conductive structure, the display panel includes a base substrate and at least one pressure touch electrode disposed on the base substrate; a space is formed between the conductive structure and the display panel; and the distance between the pressure touch electrode and the conductive structure is Changing, and corresponding to the conductive structure and forming a touch sensing capacitor to sense the touch operation.
  • the touch display panel can realize pressure touch without major changes to a conventional display device (for example, a mobile phone), and can avoid the influence of large assembly tolerance on touch precision, thereby further improving user touch. Experience.
  • At least one embodiment of the present disclosure provides a touch display panel including: a conductive structure; a display panel disposed on the conductive structure, the display panel including a base substrate and the lining At least one pressure touch electrode on the base substrate; the conductive structure and the display surface A space is formed between the boards, and the distance between the pressure touch electrodes and the conductive structure is changed.
  • the pressure touch electrodes and the conductive structures are correspondingly disposed and constitute a touch sensing capacitor to sense a touch operation.
  • the substrate is disposed on a side of the display panel adjacent to the conductive structure, and the at least one pressure touch electrode is directly disposed on the lining On the base substrate.
  • the display panel further includes: an organic light emitting layer; and first and second electrodes disposed on opposite sides of the organic light emitting layer.
  • the display panel further includes: a pixel compensation circuit, the pixel compensation circuit includes: a driving thin film transistor, wherein the driving thin film transistor includes a gate and a fixed electrode, The gate is disposed corresponding to the fixed electrode to form a first storage capacitor, and the pressure touch electrode is disposed corresponding to the gate to form a second storage capacitor, and the second storage capacitor and the first storage The capacitors are connected in parallel.
  • the pressure touch electrode array is arranged on the base substrate and drawn through a wire.
  • the display panel includes a plurality of sub-pixel units, and each of the pressure touch electrodes includes a plurality of sub-pressure touch electrodes arranged in an array, and the sub-pixels The unit is disposed in one-to-one correspondence with the sub-pressure touch electrodes, and a plurality of the sub-pressure touch electrodes of each of the pressure touch electrodes are electrically connected.
  • each of the sub-pressure touch electrodes is a wire frame structure or a grid structure composed of metal wires.
  • an orthographic projection of the sub-pressure touch electrode on the substrate substrate and an orthographic projection of the driving thin film transistor on the substrate substrate are not overlapping.
  • the material of the pressure touch electrode includes a composite layer of aluminum or molybdenum/aluminum/molybdenum.
  • At least one embodiment of the present disclosure provides a touch display device, including: a bottom plate and a touch display panel, wherein the touch display panel is the touch display panel according to any one of the above, wherein the conductive structure is disposed on the bottom plate on.
  • the bottom plate is a middle frame of a mobile phone.
  • At least one embodiment of the present disclosure provides a method for driving a touch display panel, comprising: detecting the touch sense formed by each of the pressure touch electrodes and the conductive structure The capacitance value of the capacitor should be changed to detect the touch operation.
  • the driving method of the touch display panel further includes: when the touch display panel is not in use, inputting a touch signal into the pressure touch electrode, and recording the pressure touch electrode a first charging time T1; when the touch display panel is not in use, inputting a touch signal to the pressure touch electrode, and obtaining a second charging time T2 of the pressure touch electrode; The second charging time T2 is compared with the first charging time T1, and the pressure of the touch operation is determined according to the relationship between the first charging time T1 and the second charging time T2.
  • the touch display panel further includes: a pixel compensation circuit, the pixel compensation circuit includes a driving thin film transistor, and the driving thin film transistor includes a gate And a fixed electrode, the gate is disposed corresponding to the fixed electrode to form a first storage capacitor, and the pressure touch electrode is disposed corresponding to the gate to form a second storage capacitor, and the second storage capacitor is
  • the method further includes: applying a turn-on voltage to the gate and the pressure touch electrode to display the touch display panel.
  • the pressure touch electrode array is arranged on the base substrate and is led out by a wire, and the driving method further includes: according to the The position of the pressure touch electrode determines the position at which the touch operation occurs.
  • FIG. 1 is a schematic structural diagram of a touch display panel according to an embodiment of the present disclosure
  • FIG. 1b is a schematic diagram of a touch display panel improving compensation capability according to an embodiment of the present disclosure
  • FIG. 2a is a schematic diagram of a gate connecting a thin film transistor using a variable capacitor according to an embodiment of the present disclosure
  • 2b is a diagram showing relationship between rise time and fall time of an output signal of a thin film transistor and a variable capacitance value when a gate of a thin film transistor is connected using a variable capacitor according to an embodiment of the present disclosure
  • FIG. 3 is a schematic plan view showing a manner of discharging a pressure touch electrode according to an embodiment of the present disclosure
  • FIG. 4 is a schematic plan view of a pressure touch electrode according to an embodiment of the present disclosure.
  • FIG. 5 is a schematic structural diagram of a touch display device according to an embodiment of the present disclosure.
  • the inventor of the present application found that the usual touch display device adds an additional mechanism to the pressure touch in the backlight module of the liquid crystal display panel or the middle frame of the mobile phone.
  • this design requires changes to the structural design of the mobile phone, which is costly and not conducive to thin and light design; and, due to the large tolerance of the frame assembly of the liquid crystal display panel and the backlight module or the mobile phone, the touch of this design The accuracy is not high.
  • Embodiments of the present disclosure provide a touch display panel, a driving method thereof, and a touch display device.
  • the touch display panel comprises: a conductive structure and a display panel.
  • the display panel is disposed on the conductive structure, the display panel includes a base substrate and at least one pressure touch electrode disposed on the base substrate; a space is formed between the conductive structure and the display panel; and the distance between the pressure touch electrode and the conductive structure It can be changed and arranged corresponding to the conductive structure and constitutes a touch sensing capacitor to sense the touch operation.
  • the touch display panel can realize pressure touch without major changes to a conventional display device (for example, a mobile phone), and can avoid the influence of large assembly tolerance on touch precision, thereby further improving user touch. Experience.
  • the embodiment provides a touch display panel.
  • the touch display panel includes a guide.
  • the display panel 100 is disposed on the conductive structure 122.
  • the display panel 100 includes a base substrate 101 and at least one pressure touch electrode 121 disposed on the base substrate 101.
  • a space is formed between the conductive structure 122 and the display panel 100.
  • the distance between the touch control electrode 121 and the conductive structure 122 may be changed by a touch operation. For example, when the display panel 100 is subjected to the pressure of the touch operation, the display panel 100 may be deformed, and the touched portion moves to the conductive structure 122 to change the pressure.
  • the distance between the touch electrode 121 and the conductive structure 122 is determined, and the touch control electrode 121 is disposed corresponding to the conductive structure 122 and constitutes the touch sensing capacitor 124 to sense the touch operation.
  • the conductive structure may be a metal layer.
  • the conductive structure may also be a conductive oxide, such as indium tin oxide (ITO).
  • ITO indium tin oxide
  • the touch display panel provided in this embodiment, when a touch operation occurs, for example, a finger presses the display panel, the distance between the pressure touch electrode and the conductive structure is changed, and at this time, the pressure touch electrode and The capacitance value of the touch sensing capacitor formed by the conductive structure is changed, and the touch operation can be sensed by detecting the change of the capacitance value, and the pressure of the touch operation can be sensed, thereby implementing the pressure touch.
  • the pressure touch electrode is disposed on the base substrate, it can be fabricated together with the display panel, and the display device (for example, a mobile phone) using the touch display panel provided by the embodiment can be modified without being changed. The pressure touch is realized, and on the other hand, the influence of the large assembly tolerance on the touch precision can be avoided, thereby further improving the user's touch experience.
  • the touch display panel further includes a spacer 123 disposed between the conductive structure 122 and the display panel 100 for supporting conductive A space formed between the structure 122 and the display panel 100. Therefore, the spacer 123 can support the space formed between the conductive structure 122 and the display panel 100 on the one hand and can be quickly recovered after being touch-deformed, and on the other hand, can increase between the conductive structure 122 and the display panel 100.
  • the distance of the touch sensing capacitor 124 formed by the pressure touch electrode 121 and the conductive structure 122 is increased to provide a richer pressure recognition level.
  • the base substrate 101 is disposed on a side of the display panel 100 adjacent to the conductive structure 122, and the pressure touch electrode 121 is directly disposed on the substrate.
  • the substrate 101 On the substrate 101. Therefore, there is no interference between the pressure touch electrode 121 and the conductive structure 122, so that the accuracy of the touch can be further improved.
  • the pressure touch electrode 121 since the pressure touch electrode 121 is directly disposed on the base substrate 101, the pressure touch electrode 121 has less influence on the electrodes, wires or electronic devices in the display panel 100.
  • the display surface The board 100 is an Organic Light Emitting Diode (OLED) display panel.
  • the display panel 100 includes an organic light emitting layer 108 and first and second electrodes 107 and 109 disposed on both sides of the organic light emitting layer 108.
  • An organic light emitting diode (OLED) display panel is driven by a current, and is usually controlled by a combination of a thin film transistor (TFT) and a storage capacitor to output different current values, thereby controlling an organic light emitting diode (Organic Light).
  • TFT thin film transistor
  • Emitting Diode, OLED displays the gray scale of the panel for display.
  • the display panel 100 is an Organic Light Emitting Diode (OLED) display panel, it is driven by current, relative to the liquid crystal driven by voltage.
  • OLED Organic Light Emitting Diode
  • the voltage on the pressure touch electrode 121 has less influence on the display driving circuit, so that the touch display panel provided by the embodiment has better display effect and more practicality.
  • the first electrode is a cathode
  • the second electrode is an anode
  • the first electrode is an anode
  • the second electrode is a cathode
  • the display panel may also be other types of display panels, such as a liquid crystal display panel or an electronic paper. The embodiments of the present disclosure are not limited herein.
  • the display panel 100 further includes a pixel compensation circuit 150.
  • the pixel compensation circuit 150 is used to eliminate the adverse effect of the drift of the thin film transistor threshold voltage (Vth) on the display effect caused by factors such as insufficient process uniformity.
  • the pixel compensation circuit 150 includes a driving thin film transistor 151 and a fixed electrode 106.
  • the driving thin film transistor 151 and the fixed electrode 106 are disposed on the base substrate 101, and the driving thin film transistor 150 includes the gate electrode 105. As shown in FIG.
  • the gate electrode 105 can be disposed corresponding to the fixed electrode 106 and form a first storage capacitor C1 with the fixed electrode 106 at the display stage of the display panel 100, which can improve the compensation capability of the pixel compensation circuit 150.
  • the gate electrode 105 can also be disposed corresponding to the pressure touch electrode 121 at the same time and constitute a second storage capacitor C2.
  • the second storage capacitor C2 can be connected in parallel with the first storage capacitor C1, thereby further improving the compensation capability of the pixel compensation circuit 150. For example, a capacitance value is increased by applying a voltage of the same potential as the gate to the pressure touch electrode to connect the second storage capacitor in parallel with the first storage capacitor.
  • the capacitance value for pixel compensation When the capacitance value for pixel compensation is increased, its ability to turn on the driving thin film transistor 151 is enhanced, and the rise time of the electric signal passing through the driving thin film transistor 151 can be lowered, thereby further improving the compensation ability of the pixel compensation circuit 150.
  • a clock signal (CLK) is applied to the source of the thin film transistor T3, for example, the clock signal is a square wave signal; a variable capacitor C3 is connected to the gate of the thin film transistor T3, and then the thin film transistor T3 is detected.
  • CLK clock signal
  • the rise time Tr and the fall time Tf of the output signal decreases as the capacitance value of the variable capacitor C3 increases.
  • the fixed electrode 106 may also be referred to as a constant voltage electrode, and is usually loaded with a Vdd (voltage of 3-5 V) signal.
  • the touch display panel provided in this embodiment can be implemented by using a common driving circuit.
  • the specific electronic device of the driving circuit and the connection relationship thereof can be referred to a common design, and the embodiment of the present disclosure is not limited herein.
  • the driving thin film transistor 150 further includes an active layer 153 .
  • the orthographic projection of the pressure touch electrode 121 on the base substrate 101 does not overlap with the orthographic projection of the active layer 153 on the base substrate 101, thereby preventing the voltage on the pressure touch electrode 121 from adversely affecting the active layer 153. .
  • the display panel 100 further includes an insulating layer 102.
  • the insulating layer 102 is disposed on the pressure touch electrode 121 for insulating the pressure touch electrode 121 from electrodes, wires or electronic devices in the display panel (for example, a thin film transistor).
  • the pressure touch electrode can also be disposed in the same layer as the electrode, the wire or the electronic device on the base substrate by appropriately designing the position of the pressure touch electrode; for example,
  • the driving thin film transistor is a top gate thin film transistor
  • the pressure touch electrode and the active layer of the driving thin film transistor may be disposed in the same layer, and insulation is realized by a certain distance
  • the driving thin film transistor is a bottom gate thin film transistor
  • the pressure touch electrode can be disposed in the same layer as the gate of the driving thin film transistor, and insulated by a certain distance. Therefore, the mask process for forming the touch display panel provided by the embodiment can be reduced, and the thickness of the touch display panel provided by the embodiment can be reduced.
  • the driving thin film transistor is a top gate thin film transistor
  • the active layer of the pressure touch electrode and the driving thin film transistor can be disposed in the same layer corresponding to the gate of the driving thin film transistor and constitute the second storage capacitor C2. .
  • the material of the pressure touch electrode may include a composite layer of aluminum or molybdenum/aluminum/molybdenum.
  • the pressure touch electrode is made of metal, the signal delay on the pressure touch electrode is small due to the small resistance, so that a large-sized touch display panel can be prepared.
  • the material of the pressure touch electrode may further include other metal materials such as silver, or a conductive oxide such as indium tin oxide (ITO) or the like.
  • the present embodiment provides a touch display panel.
  • the array of pressure touch electrodes 121 is arranged on the base substrate 101 and led out through the wires 140.
  • the position at which the touch operation occurs can be determined by detecting the position where the pressure touch electrode 121 is located (for example, the first few rows). Therefore, the touch display panel provided in this embodiment can simultaneously realize the position recognition and pressure recognition of the touch operation without providing other touch structures, can simplify the structure of the touch display panel, and can improve the touch experience of the user.
  • the display panel includes a plurality of sub-pixel units 117, and an array of the plurality of sub-pixel units 117 is arranged on the base substrate 101.
  • Each of the pressure touch electrodes 121 includes a plurality of sub-pressure touch electrodes 1210 arranged in an array, and each sub-pressure touch electrode 1210 is disposed in one-to-one correspondence with each sub-pixel unit 117.
  • the plurality of sub-pressure touch electrodes 1210 can be electrically connected through the wires 140 to form one pressure touch electrode 121.
  • the sub-pressure touch electrode 1210 can be designed to be small, and the pressure touch electrode 121 can be designed to be large, so that the effect of the sub-pressure touch electrode 1210 on the one-to-one corresponding sub-pixel unit can be reduced.
  • the capacitance variation of the touch sensing capacitor between the pressure touch electrode 121 and the conductive structure can be increased, thereby providing more pressure recognition levels.
  • each sub-pressure touch electrode 1210 is a wire frame structure or a grid structure composed of metal wires. Since the electronic devices (for example, thin film transistors) in the driving circuit of the organic light emitting diode (OLED) display panel are many and distributed, the sub-pressure touch electrodes 1210 can be arranged as a line composed of metal wires.
  • the frame structure (for example, as shown in FIG. 4, the sub-pressure touch electrodes are two electrically connected wire frame structures) or the grid structure can avoid electrodes, wires or electrons in the sub-pixel unit 117 disposed in one-to-one correspondence therewith. The device further reduces the influence of the pressure touch electrode on the driving circuit in the display panel.
  • the wire frame structure or the grid structure formed by the sub-pressure touch electrode 1210 is a metal wire. It can be used to make large-size touch display panels while maintaining a high aperture ratio.
  • the black dots in the sub-pixel unit 117 represent electronic devices in the OLED display panel driving circuit, such as driving thin film transistors, etc.
  • the orthographic projection of the sub-pressure touch electrodes 1210 on the substrate 101 can be The orthographic projections of the driving thin film transistors on the base substrate 101 do not overlap, so that the voltage on the sub-pressure touch electrodes can be prevented from adversely affecting the active layer of the driving thin film transistors.
  • the present embodiment provides a touch display device.
  • the display device includes a bottom plate 130 and a touch display panel 200 .
  • the touch display panel 200 is the touch display panel described in any of the above, and the conductive structure 122 is disposed on the bottom plate 130.
  • the touch display device can be any product or component having a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, and the like.
  • the touch display device includes the touch display panel described in any of the above, so that the touch display device has the beneficial effects corresponding to the beneficial effects of the touch display panel, which is not described herein.
  • the bottom plate when the touch display device provided in this embodiment is a mobile phone, the bottom plate may be a middle frame of the mobile phone.
  • the conductive structure may be a metal disposed on the middle frame.
  • the embodiment of the present disclosure is not limited thereto.
  • the touch panel of the touch display device provided in this embodiment uses a liquid crystal display panel
  • the bottom plate may be a backlight module.
  • the conductive structure may be a metal frame that is coated on the outer side of the backlight module, or may be specifically a metal patch that is attached to the back surface of the backlight module.
  • the embodiment of the present disclosure is not limited herein.
  • the present invention provides a driving method for a touch display panel, which is used in the above touch display panel.
  • the driving method includes: detecting a touch sensing capacitor formed by each pressure touch electrode and a conductive structure during a touch time period. A change in capacitance value to detect touch operations.
  • the driving method can detect the occurrence of a touch operation by detecting a change in the capacitance value.
  • the method further includes steps 401-403.
  • Step 401 When the touch display panel is not in use, input a touch signal to the pressure touch electrode, and record the first charging time T1 of the pressure touch electrode;
  • Step 402 Input a touch signal into the pressure touch electrode during the touch time period, and obtain a second charging time T2 of the pressure touch electrode;
  • Step 403 Compare the second charging time T2 with the first charging time T1, and determine the pressure magnitude of the touch operation according to the relationship between the first charging time T1 and the second charging time T2.
  • the relationship between the capacitance value of the touch sensing capacitor formed by the pressure touch electrode and the conductive structure can be determined according to the relationship between the first charging time T1 and the second charging time T2, for example, when the capacitor The value changes greatly, indicating that the deformation caused by the touch operation is large, further indicating that the pressure of the touch operation is relatively large. Therefore, the driving method can indirectly feedback the pressure of the touch operation by the charging time.
  • the touch display panel further includes: a pixel compensation circuit, the pixel compensation circuit includes a driving thin film transistor and a fixed electrode, the driving thin film transistor includes a gate, and the gate and the fixed electrode are correspondingly disposed.
  • the pressure touch electrode is disposed corresponding to the gate to form a second storage capacitor, and the second storage capacitor is connected in parallel with the first storage capacitor.
  • the driving method further includes: to the pressure during the display period The touch electrode applies a voltage of the same potential as the gate to connect the second storage capacitor in parallel with the first storage capacitor, thereby further improving the compensation capability of the pixel compensation circuit.
  • the pressure touch electrode array is arranged on the base substrate and is led out by the wire.
  • the driving method further includes: according to the position of the pressure touch electrode during the touch time period For example, the position of the pressure touch electrode corresponding to the touch sensing capacitor whose capacitance value changes is used to determine the position where the touch operation occurs.

Abstract

一种触控显示面板及其驱动方法以及触控显示装置。该触控显示面板包括：导电结构(122)和显示面板(100)。显示面板(100)设置在导电结构(122)上并且包括衬底基板(101)以及设置在衬底基板(101)上的至少一个压力触控电极(121)；导电结构(122)与显示面板(100)相对设置并形成一空间，压力触控电极(121)与导电结构(122)的距离可改变，压力触控电极(121)和导电结构(122)对应设置并构成触控感应电容(124)以感测触控操作。该触控显示面板可不用对通常的显示装置进行大的改动就可实现压力触控，并且可避免装配公差较大对触控精度的影响，从而可提高触控精度。

Description

触控显示面板及其驱动方法以及触控显示装置
本申请要求于2016年08月30日递交的中国专利申请第201610787036.8号的优先权，在此全文引用上述中国专利申请公开的内容以作为本申请的一部分。
技术领域
本公开的实施例涉及一种触控显示面板、触控显示装置及触控显示面板的驱动方法。
背景技术
目前，有机发光二极管(Organic Light Emitting Diode，OLED)显示器是平板显示器技术领域的研究热点之一。与液晶显示器(Liquid Crystal Display，LCD)相比，有机发光二极管显示器具有低能耗、生产成本低、自发光、宽视角及响应速度快等优点。在手机、PDA、数码相机等显示领域有机发光二极管(Organic Light Emitting Diode，OLED)显示器已经越来越受到欢迎。
压力感应技术是指对外部受力能够感应或测量的技术。许多厂商正在寻求合适的技术方案来在显示领域尤其是手机或平板电脑等领域实现压力感应，从而使用户得到更好的、更丰富的人机交互体验。
发明内容
本公开实施例提供一种触控显示面板及其驱动方法以及触控显示装置。该触控显示面板包括：导电结构以及显示面板。显示面板设置在导电结构上，显示面板包括衬底基板以及设置在衬底基板上的至少一个压力触控电极；导电结构与显示面板之间形成一空间；压力触控电极与导电结构的距离可改变，并且和导电结构对应设置并构成触控感应电容以感测触控操作。该触控显示面板可不用对通常的显示装置(例如，手机)进行大的改动就可实现压力触控，并且可避免装配公差较大对触控精度的影响，从而可进一步提高用户的触控体验。
本公开至少一实施例提供一种触控显示面板，其包括：导电结构；显示面板，所述显示面板设置在所述导电结构之上，所述显示面板包括衬底基板以及设置在所述衬底基板上的至少一个压力触控电极；所述导电结构与所述显示面 板之间形成一空间，所述压力触控电极与所述导电结构的距离可改变，所述压力触控电极和所述导电结构对应设置并构成触控感应电容以感测触控操作。
例如，在本公开一实施例提供的触控显示面板中，所述衬底基板设置在所述显示面板靠近所述导电结构的一侧，所述至少一个压力触控电极直接设置在所述衬底基板上。
例如，在本公开一实施例提供的触控显示面板中，所述显示面板还包括：有机发光层以及设置在所述有机发光层两侧的第一电极和第二电极。
例如，在本公开一实施例提供的触控显示面板中，所述显示面板还包括：像素补偿电路，所述像素补偿电路包括：驱动薄膜晶体管，所述驱动薄膜晶体管包括栅极以及固定电极，所述栅极与所述固定电极对应设置以构成第一存储电容，所述压力触控电极与所述栅极对应设置以构成第二存储电容，所述第二存储电容与所述第一存储电容并联。
例如，在本公开一实施例提供的触控显示面板中，所述压力触控电极阵列排布在所述衬底基板上并通过导线引出。
例如，在本公开一实施例提供的触控显示面板中，所述显示面板包括多个子像素单元，各所述压力触控电极包括多个阵列排布的子压力触控电极，所述子像素单元与所述子压力触控电极一一对应设置，各所述压力触控电极中的多个所述子压力触控电极电连接。
例如，在本公开一实施例提供的触控显示面板中，各所述子压力触控电极为金属导线构成的线框结构或网格结构。
例如，在本公开一实施例提供的触控显示面板中，所述子压力触控电极在所述衬底基板上的正投影与所述驱动薄膜晶体管在所述衬底基板上的正投影不重叠。
例如，在本公开一实施例提供的触控显示面板中，所述压力触控电极的材料包括铝或钼/铝/钼的复合层。
本公开至少一实施例提供一种触控显示装置，其包括：底板以及触控显示面板，触控显示面板为上述任一项所述的触控显示面板，所述导电结构设置在所述底板上。
例如，在本公开一实施例提供的触控显示装置中，所述底板为手机中框。
本公开至少一实施例提供一种触控显示面板的驱动方法，用于上述的触控显示面板，包括：检测各所述压力触控电极和所述导电结构构成的所述触控感 应电容的电容值的变化，以检测触控操作。
例如，本公开一实施例提供的触控显示面板的驱动方法还包括：当所述触控显示面板未使用时，将触控信号输入所述压力触控电极，并记录所述压力触控电极的第一充电时间T1；当所述触控显示面板未使用时，将触控信号输入所述压力触控电极，并得到所述压力触控电极的第二充电时间T2；以及将所述第二充电时间T2与所述第一充电时间T1比较，根据所述第一充电时间T1和所述第二充电时间T2的关系确定所述触控操作的压力大小。
例如，在本公开一实施例提供的触控显示面板的驱动方法中，所述触控显示面板还包括：像素补偿电路，所述像素补偿电路包括驱动薄膜晶体管，所述驱动薄膜晶体管包括栅极；以及固定电极，所述栅极与所述固定电极对应设置以构成第一存储电容，所述压力触控电极与所述栅极对应设置以构成第二存储电容，所述第二存储电容与所述第一存储电容并联，所述方法还包括：向所述栅极和所述压力触控电极同时施加开启电压以使所述触控显示面板进行显示。
例如，在本公开一实施例提供的触控显示面板的驱动方法中，所述压力触控电极阵列排布在所述衬底基板上且通过导线引出，所述驱动方法还包括：根据所述压力触控电极的位置判断触控操作发生的位置。
附图说明
为了更清楚地说明本公开实施例的技术方案，下面将对实施例的附图作简单地介绍，显而易见地，下面描述中的附图仅仅涉及本公开的一些实施例，而非对本公开的限制。
图1a为本公开一实施例提供的一种触控显示面板的结构示意图；
图1b为本公开一实施例提供的一种触控显示面板提高补偿能力的原理图；
图2a为本公开一实施例提供的一种使用可变电容连接薄膜晶体管的栅极的示意图；
图2b为本公开一实施例提供的一种在使用可变电容连接薄膜晶体管的栅极的情况下，薄膜晶体管的输出信号的上升时间和下降时间与可变电容电容值的关系图；
图3为本公开一实施例提供的一种压力触控电极排布方式的平面示意图；
图4为本公开一实施例提供的一种压力触控电极的平面示意图；以及
图5为本公开一实施例提供的一种触控显示装置的结构示意图。
具体实施方式
为使本公开实施例的目的、技术方案和优点更加清楚，下面将结合本公开实施例的附图，对本公开实施例的技术方案进行清楚、完整地描述。显然，所描述的实施例是本公开的一部分实施例，而不是全部的实施例。基于所描述的本公开的实施例，本领域普通技术人员在无需创造性劳动的前提下所获得的所有其他实施例，都属于本公开保护的范围。
除非另外定义，本公开使用的技术术语或者科学术语应当为本公开所属领域内具有一般技能的人士所理解的通常意义。本公开中使用的“第一”、“第二”以及类似的词语并不表示任何顺序、数量或者重要性，而只是用来区分不同的组成部分。“包括”或者“包含”等类似的词语意指出现该词前面的元件或者物件涵盖出现在该词后面列举的元件或者物件及其等同，而不排除其他元件或者物件。“连接”或者“相连”等类似的词语并非限定于物理的或者机械的连接，而是可以包括电性的连接，不管是直接的还是间接的。
在研究中，本申请的发明人发现：通常的触控显示装置是在液晶显示面板的背光模组或者手机的中框增加额外的机构来实现压力触控。然而，这种设计需要对手机的结构设计做出改动，成本较高且不利于轻薄化设计；并且，由于液晶显示面板和背光模组或手机中框装配公差较大，这种设计的触控精度不高。
本公开实施例提供一种触控显示面板及其驱动方法以及触控显示装置。该触控显示面板包括：导电结构以及显示面板。显示面板设置在导电结构之上，显示面板包括衬底基板以及设置在衬底基板上的至少一个压力触控电极；导电结构与显示面板之间形成一空间；压力触控电极与导电结构的距离可改变，并且和导电结构对应设置并构成触控感应电容以感测触控操作。该触控显示面板可不用对通常的显示装置(例如，手机)进行大的改动就可实现压力触控，并且可避免装配公差较大对触控精度的影响，从而可进一步提高用户的触控体验。
下面结合附图对本公开实施例提供的触控显示面板及其驱动方法以及触控显示装置进行说明。
实施例一
本实施例提供一种触控显示面板，如图1a所示，该触控显示面板包括导 电结构122以及显示面板100。显示面板100设置在导电结构122上，显示面板100包括衬底基板101以及设置在衬底基板101上的至少一个压力触控电极121。导电结构122和显示面板100之间形成一空间。压力触控电极121与导电结构122的距离可因触控操作而改变，例如，当显示面板100受到触控操作的压力时会发生形变，被触控的部位向导电结构122移动，从而改变压力触控电极121与导电结构122的距离，并且压力触控电极121与导电结构122对应设置并构成触控感应电容124以感测触控操作。
例如，导电结构可为金属层，当然，本公开实施例包括但不限于此，导电结构还可为导电氧化物，例如，氧化铟锡(ITO)。
在本实施例提供的触控显示面板中，当有触控操作发生时，例如，手指按压显示面板，压力触控电极和导电结构的距离因此而发生改变，而此时由压力触控电极和导电结构构成的触控感应电容的电容值发生改变，通过检测这种电容值的改变就可感测触控操作，并且可感测到触控操作的压力，从而可实现压力触控。另外，由于压力触控电极设置在衬底基板上，可与显示面板一起制作，一方面可不用对采用本实施例提供的触控显示面板的显示装置(例如，手机)进行大的改动就可实现压力触控，另一方面可避免装配公差较大对触控精度的影响，从而可进一步提高用户的触控体验。
例如，在本实施例一示例提供的触控显示面板中，如图1a所示，该触控显示面板还包括设置在导电结构122和显示面板100之间的隔垫物123，用于支撑导电结构122和显示面板100之间形成的空间。由此，隔垫物123一方面可以支撑导电结构122和显示面板100之间形成的空间并使之在被触控变形后能够迅速恢复，另一方面可增加导电结构122和显示面板100之间的距离，提高压力触控电极121与导电结构122构成的触控感应电容124的电容变化量，以提供更丰富的压力识别等级。
例如，在本实施例一示例提供的触控显示面板中，如图1a所示，衬底基板101设置在显示面板100靠近导电结构122的一侧，并且压力触控电极121直接设置在衬底基板101上。由此，压力触控电极121与导电结构122之间没有其他电极的干扰，从而可进一步提高触控的准确性。另一方面，由于压力触控电极121直接设置在衬底基板101上，压力触控电极121对显示面板100中的电极、导线或电子器件的影响较小。
例如，在本实施例一示例提供的触控显示面板中，如图1a所示，显示面 板100为有机发光二极管(Organic Light Emitting Diode，OLED)显示面板。该显示面板100包括有机发光层108以及设置在有机发光层108两侧的第一电极107和第二电极109。有机发光二极管(Organic Light Emitting Diode，OLED)显示面板是依靠电流进行驱动，通常通过薄膜晶体管(Thin Film Transistor，TFT)和存储电容的组合来输出不同的电流值，从而控制有机发光二极管(Organic Light Emitting Diode，OLED)显示面板的灰阶以进行显示，因此，当显示面板100为有机发光二极管(Organic Light Emitting Diode，OLED)显示面板时，由于其依靠电流进行驱动，相对于依靠电压驱动的液晶显示面板，压力触控电极121上的电压对其显示驱动电路造成的影响较小，从而使本实施例提供的触控显示面板的显示效果更好，实用性更强。需要说明的是，上述第一电极为阴极，第二电极为阳极，或者，第一电极为阳极，第二电极为阴极。另外，显示面板也可为液晶显示面板或电子纸等其他类型的显示面板，本公开实施例在此不作限制。
例如，在本实施例一示例提供的触控显示面板中，如图1a所示，该显示面板100还包括像素补偿电路150。像素补偿电路150用于消除工艺均一性不足等因素而导致的薄膜晶体管阈值电压(Vth)的漂移对显示效果的不良影响。像素补偿电路150包括驱动薄膜晶体管151和固定电极106。驱动薄膜晶体管151和固定电极106设置在衬底基板101上，并且驱动薄膜晶体管150包括栅极105。如图1b所示，栅极105可与固定电极106对应设置并在该显示面板100的显示阶段与固定电极106构成第一存储电容C1，可提高像素补偿电路150的补偿能力。栅极105还可同时与压力触控电极121对应设置并构成第二存储电容C2，第二存储电容C2可与第一存储电容C1并联，从而进一步提高像素补偿电路150的补偿能力。例如，通过对压力触控电极施加与栅极相同电位的电压以使所述第二存储电容与所述第一存储电容并联，从而增加电容值。当用于像素补偿的电容值增加后，其开启驱动薄膜晶体管151的能力得到增强，可降低通过驱动薄膜晶体管151的电信号的上升时间，从而进一步提高像素补偿电路150的补偿能力。
例如，如图2a所示，向薄膜晶体管T3的源极施加时钟信号(CLK)，例如，该时钟信号为方波信号；在薄膜晶体管T3的栅极连接可变电容C3，然后检测薄膜晶体管T3的输出信号的上升时间Tr和下降时间Tf。如图2b所示，输出信号的上升时间Tr随着可变电容C3电容值的增大而减小。由此可知，在 本实施例提供的触控显示面板中，当压力触控电极与驱动薄膜晶体管的栅极构成的第二存储电容C2与第一存储电容C1并联时，电容值增加。第二存储电容C2与第一存储电容C1并联后的电容开启驱动薄膜晶体管的能力得到增强，从而可降低通过驱动薄膜晶体管的电信号的上升时间，从而进一步提高像素补偿电路的补偿能力。
需要说明的是，固定电极106又可称为恒压电极，通常加载Vdd(3-5V的电压)信号。另外，本实施例提供的触控显示面板可采用通常的驱动电路来实现显示，驱动电路的具体电子器件及其连接关系可参照通常设计，本公开实施例在此不作限制。
例如，在本实施例一示例提供的触控显示面板中，如图1所示，驱动薄膜晶体管150还包括有源层153。压力触控电极121在衬底基板101上的正投影与有源层153在衬底基板101上的正投影不重叠，从而可避免压力触控电极121上的电压对有源层153造成不良影响。
例如，在本实施例一示例提供的触控显示面板中，如图1a所示，该显示面板100还包括绝缘层102。绝缘层102设置压力触控电极121上，用以使压力触控电极121与显示面板中电极、导线或电子器件绝缘(例如，薄膜晶体管)。
例如，在本实施例一示例提供的触控显示面板中，通过合理设计压力触控电极的位置，压力触控电极也可与衬底基板上的电极、导线或电子器件同层设置；例如，当驱动薄膜晶体管为顶栅型薄膜晶体管时，可将压力触控电极与驱动薄膜晶体管的有源层同层设置，通过间隔一定距离来实现绝缘，当驱动薄膜晶体管为底栅型薄膜晶体管时，可将压力触控电极与驱动薄膜晶体管的栅极同层设置，并通过间隔一定距离来实现绝缘。由此，可减少形成本实施例提供的触控显示面板的掩膜工艺，并且可减小本实施例提供的触控显示面板的厚度。需要说明的是，当驱动薄膜晶体管为顶栅型薄膜晶体管时，压力触控电极与驱动薄膜晶体管的有源层同层设置可同时与驱动薄膜晶体管的栅极对应设置并构成第二存储电容C2。
例如，在本实施例一示例提供的触控显示面板中，压力触控电极的材料可包括铝或钼/铝/钼的复合层。当采用金属制作压力触控电极时，由于电阻较小，压力触控电极上的信号延迟较小，从而可制备大尺寸的触控显示面板。当然，本公开实施例包括但不限于此，压力触控电极的材料还可包括其他金属材料，例如银，或者导电氧化物，例如氧化铟锡(ITO)等。
实施例二
在实施例一的基础上，本实施例提供一中触控显示面板，如图3所示，压力触控电极121阵列排布在衬底基板101上并通过导线140引出。由此，可通过检测压力触控电极121所在的位置(例如，第几行第几列)从而判断触控操作发生的位置。因此，本实施例提供的触控显示面板可不设置其他的触控结构便可同时实现触控操作的位置识别和压力识别，可简化触控显示面板的结构，并且可提高用户的触控体验。
例如，在本实施例一示例提供的触控显示面板中，如图4所示，所述显示面板包括多个子像素单元117，多个子像素单元117阵列排布在衬底基板101上。各压力触控电极121包括多个阵列排布的子压力触控电极1210，把并且各子压力触控电极1210与各子像素单元117一一对应设置。由此，可将多个子压力触控电极1210通过导线140电连接从而构成一个压力触控电极121。此时，子压力触控电极1210可设计地较小，而压力触控电极121可设计地较大，从而一方面可减少子压力触控电极1210对其一一对应设置的子像素单元的影响，另一方面也可提高压力触控电极121与导电结构之间触控感应电容的电容变化量，从而提供更多的压力识别等级。
例如，在本实施例一示例提供的触控显示面板中，如图4所示，各子压力触控电极1210为金属导线构成的线框结构或网格结构。由于有机发光二极管(Organic Light Emitting Diode，OLED)显示面板的驱动电路中电子器件(例如，薄膜晶体管)较多，且分布较为分散，可通过将子压力触控电极1210设置为金属导线构成的线框结构(例如，如图4所示，子压力触控电极为两个电连接的线框结构)或网格结构可避开与其一一对应设置的子像素单元117中的电极、导线或电子器件，从而进一步减少压力触控电极对显示面板中驱动电路的影响，另外，在显示面板100为液晶显示面板时，通过将子压力触控电极1210为金属导线构成的线框结构或网格结构，既可在保持较高的开口率又可用于制作大尺寸的触控显示面板。
例如，如图4所示，子像素单元117中的黑点代表OLED显示面板驱动电路中的电子器件，例如驱动薄膜晶体管等，子压力触控电极1210在衬底基板101上的正投影可与驱动薄膜晶体管在衬底基板101上的正投影不重叠，从而可避免子压力触控电极上的电压对驱动薄膜晶体管的有源层造成不良影响。
实施例三
本实施例提供一种触控显示装置，如图5所示，该显示装置包括底板130以及触控显示面板200。触控显示面板200为上述任一项所描述的触控显示面板并且导电结构122设置在底板130上。该触控显示装置可以为：手机、平板电脑、电视机、显示器、笔记本电脑、数码相框、导航仪等任何具有显示功能的产品或部件。由于该触控显示装置包括上述任一项所描述的触控显示面板，因此该触控显示装置具有与其包括的触控显示面板的有益效果对应的有益效果，本实施例在此不再赘述。另外，对于该触控显示装置中的其他结构或部件可参考通常设计，本实施例在此不再赘述。
例如，在本实施例提供的触控显示装置中，当本实施例提供的触控显示装置为手机时，底板可以为手机的中框，此时，导电结构可为设置在中框上的金属图案或与中框为一体结构，本公开实施例在此不作限制。当本实施例提供的触控显示装置的触摸面板采用液晶显示面板时，底板可以是背光模组。并且，该导电结构可为包覆在背光模组外侧的金属框，也可以具体为贴覆于背光模组背面的金属贴片，本公开实施例在此不作限制。
实施例四
本实施例提供一种触控显示面板的驱动方法，用于上述的触控显示面板，该驱动方法包括：在触控时间段，检测各压力触控电极和导电结构构成的触控感应电容的电容值的变化，以检测触控操作。由此，该驱动方法可通过检测电容值得变化来检测到触控操作的发生。
例如，在本实施例一示例提供的驱动方法中，该方法还包括步骤401-403。
步骤401：当触控显示面板未使用时，将触控信号输入压力触控电极，并记录压力触控电极的第一充电时间T1；
步骤402：在触控时间段，将触控信号输入压力触控电极，并得到压力触控电极的第二充电时间T2；以及
步骤403：将第二充电时间T2与第一充电时间T1比较，根据第一充电时间T1和第二充电时间T2的关系确定触控操作的压力大小。
在本实施例提供驱动方法中，根据第一充电时间T1和第二充电时间T2的关系可判断由压力触控电极和导电结构构成的触控感应电容的电容值变化的大小，例如，当电容值变化较大，说明触控操作导致的形变较大，进一步说明触控操作的压力较大。由此，该驱动方法可通过充电时间来间接反馈触控操作的压力大小。
例如，在本实施例一示例提供的驱动方法中，触控显示面板还包括：像素补偿电路，像素补偿电路包括驱动薄膜晶体管和固定电极，驱动薄膜晶体管包括栅极，栅极与固定电极对应设置以构成第一存储电容，压力触控电极与栅极对应设置以构成第二存储电容，第二存储电容与第一存储电容并联，所述驱动方法还包括：在显示时间段，向所述压力触控电极施加与所述栅极相同电位的电压以使所述第二存储电容与所述第一存储电容并联，从而进一步提高像素补偿电路的补偿能力。
例如，在本实施例一示例提供的驱动方法中，压力触控电极阵列排布在衬底基板上并通过导线引出，该驱动方法还包括：在触控时间段，根据压力触控电极的位置，例如，电容值发生变化的触控感应电容所对应的压力触控电极的位置，来判断触控操作发生的位置。
有以下几点需要说明：
(1)本公开实施例附图中，只涉及到与本公开实施例涉及到的结构，其他结构可参考通常设计。
(2)为了清晰起见，在用于描述本公开的实施例的附图中，层或微结构的厚度和尺寸被放大。可以理解，当诸如层、膜、区域或基板之类的元件被称作位于另一元件“上”或“下”时，该元件可以“直接”位于另一元件“上”或“下”，或者可以存在中间元件。
(3)在不冲突的情况下，本公开同一实施例及不同实施例中的特征可以相互组合。
以上所述，仅为本公开的具体实施方式，但本公开的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本公开揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本公开的保护范围之内。因此，本公开的保护范围应以所述权利要求的保护范围为准。

Claims (15)

  1. 一种触控显示面板，包括：
    导电结构；以及
    显示面板，所述显示面板设置在所述导电结构上，所述显示面板包括衬底基板以及设置在所述衬底基板上的至少一个压力触控电极；
    其中，所述导电结构与所述显示面板相对设置并形成一空间，所述压力触控电极与所述导电结构的距离可改变，所述压力触控电极和所述导电结构对应设置并构成触控感应电容以感测触控操作。
  2. 如权利要求1所述的触控显示面板，还包括：
    隔垫物，设置在所述导电结构与所述显示面板之间以支撑所述空间。
  3. 如权利要求1或2所述的触控显示面板，其中，所述衬底基板设置在所述显示面板靠近所述导电结构的一侧，所述至少一个压力触控电极直接设置在所述衬底基板上。
  4. 如权利要求1-3中任一项所述的触控显示面板，其中，所述显示面板还包括：
    有机发光层以及设置在所述有机发光层两侧的第一电极和第二电极。
  5. 如权利要求4所述的触控显示面板，其中，所述显示面板还包括：
    像素补偿电路，所述像素补偿电路包括：
    驱动薄膜晶体管，所述驱动薄膜晶体管包括栅极；以及
    固定电极，
    其中，所述栅极与所述固定电极对应设置以构成第一存储电容，所述压力触控电极与所述栅极对应设置以构成第二存储电容，所述第二存储电容与所述第一存储电容并联。
  6. 如权利要求1-5中任一项所述的触控显示面板，其中，所述压力触控电极阵列排布在所述衬底基板上且通过导线引出。
  7. 如权利要求1-5中任一项所述的触控显示面板，其中，所述显示面板包括多个子像素单元，各所述压力触控电极包括多个阵列排布的子压力触控电极，所述子像素单元与所述子压力触控电极一一对应设置，各所述压力触控电极中的多个所述子压力触控电极电连接。
  8. 如权利要求7所述的触控显示面板，其中，各所述子压力触控电极为 金属导线构成的线框结构或网格结构。
  9. 如权利要求7所述的触控显示面板，其中，所述子压力触控电极在所述衬底基板上的正投影与所述驱动薄膜晶体管在所述衬底基板上的正投影不重叠。
  10. 一种触控显示装置，包括：
    底板；以及
    触控显示面板，
    其中，触控显示面板为权利要求1-9中任一项所述的触控显示面板，所述导电结构设置在所述底板上。
  11. 如权利要求10所述的触控显示装置，其中，所述底板为手机中框。
  12. 一种触控显示面板的驱动方法，用于权利要求1所述的触控显示面板，包括：
    在触控时间段，检测各所述压力触控电极和所述导电结构构成的所述触控感应电容的电容值的变化，以检测触控操作。
  13. 如权利要求12所述的触控显示面板的驱动方法，还包括：
    当所述触控显示面板未使用时，将触控信号输入所述压力触控电极，并记录所述压力触控电极的第一充电时间T1；
    在触控时间段，将触控信号输入所述压力触控电极，并得到所述压力触控电极的第二充电时间T2；以及
    将所述第二充电时间T2与所述第一充电时间T1比较，根据所述第一充电时间T1和所述第二充电时间T2的关系确定所述触控操作的压力大小。
  14. 如权利要求12所述的触控显示面板的驱动方法，所述触控显示面板还包括：像素补偿电路，所述像素补偿电路包括驱动薄膜晶体管，所述驱动薄膜晶体管包括栅极；以及固定电极，所述栅极与所述固定电极对应设置以构成第一存储电容，所述压力触控电极与所述栅极对应设置以构成第二存储电容，所述第二存储电容与所述第一存储电容并联，所述方法还包括：
    在显示时间段，向所述压力触控电极施加与所述栅极相同电位的电压以使所述第二存储电容与所述第一存储电容并联。
  15. 如权利要求12所述的触控显示面板的驱动方法，其中，所述压力触控电极阵列排布在所述衬底基板上且通过导线引出，所述方法包括：
    在触控时间段，根据所述压力触控电极的位置判断触控操作发生的位置。
PCT/CN2017/091141 2016-08-30 2017-06-30 触控显示面板及其驱动方法以及触控显示装置 WO2018040717A1 (zh)

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