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WO2017071366A1 - 一种内嵌式触摸屏、其驱动方法及显示装置 - Google Patents

一种内嵌式触摸屏、其驱动方法及显示装置 Download PDF

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Publication number
WO2017071366A1
WO2017071366A1 PCT/CN2016/094144 CN2016094144W WO2017071366A1 WO 2017071366 A1 WO2017071366 A1 WO 2017071366A1 CN 2016094144 W CN2016094144 W CN 2016094144W WO 2017071366 A1 WO2017071366 A1 WO 2017071366A1
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WIPO (PCT)
Prior art keywords
pressure sensing
substrate
electrode
detecting
capacitance
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2016/094144
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English (en)
French (fr)
Inventor
杨盛际
董学
薛海林
陈小川
王海生
赵卫杰
刘英明
丁小梁
刘红娟
李昌峰
王鹏鹏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BOE Technology Group Co Ltd
Beijing BOE Optoelectronics Technology Co Ltd
Original Assignee
BOE Technology Group Co Ltd
Beijing BOE Optoelectronics Technology Co Ltd
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Application filed by BOE Technology Group Co Ltd, Beijing BOE Optoelectronics Technology Co Ltd filed Critical BOE Technology Group Co Ltd
Priority to US15/502,601 priority Critical patent/US10216344B2/en
Publication of WO2017071366A1 publication Critical patent/WO2017071366A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412—Digitisers structurally integrated in a display
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/04164—Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/04166—Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0443—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a single layer of sensing electrodes
    • 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
    • H10K50/80—Constructional details
    • H10K50/86—Arrangements for improving contrast, e.g. preventing reflection of ambient light
    • H10K50/865—Arrangements for improving contrast, e.g. preventing reflection of ambient light comprising light absorbing layers, e.g. light-blocking 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
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04105—Pressure sensors for measuring the pressure or force exerted on the touch surface without providing the touch position
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0448—Details of the electrode shape, e.g. for enhancing the detection of touches, for generating specific electric field shapes, for enhancing display quality

Definitions

  • the present disclosure relates to the field of display technologies, and in particular, to an in-cell touch panel, a driving method thereof, and a display device.
  • Pressure sensing technology refers to the technology that can detect external forces. This technology has been used in industrial control, medical and other fields for a long time. At present, the way of implementing pressure sensing in the display field, especially in the field of mobile phones or flat panels, is achieved by adding an additional mechanism to the backlight portion of the liquid crystal display panel or the middle frame portion of the mobile phone. This design requires structural design of the liquid crystal display panel or the mobile phone. Changes were made and the accuracy of the detection of this design was limited due to the large assembly tolerances.
  • Embodiments of the present disclosure provide an in-cell touch panel, a driving method thereof, and a display device, which utilize a pressure sensing detecting electrode and a conductive layer under the substrate substrate by multiplexing a plurality of first electrode plates into one pressure sensing detecting electrode
  • a compact touch function that achieves better detection accuracy, reducing assembly tolerances and process complexity.
  • an embodiment of the present disclosure provides an in-cell touch panel including: a base substrate, an opposite substrate disposed opposite the base substrate, and a matrix on a side of the base substrate facing the opposite substrate a plurality of organic electroluminescent pixel units arranged, and a pixel circuit between the organic electroluminescent pixel unit and the substrate and corresponding to each of the organic electroluminescent pixel units, wherein each of the pixels
  • the circuit includes at least one storage capacitor composed of a first electrode plate and a second electrode plate sequentially located on the base substrate;
  • the in-cell touch panel includes a plurality of the pressure sensing electrodes; the pressure sensing electrodes are located at a conductive layer under the substrate substrate forms a capacitor structure;
  • the in-cell touch panel further includes a method for applying a pressure sensing detection signal to the pressure sensing detecting electrode during a pressure sensing touch phase, and detecting a change in a capacitance value between the pressure sensing detecting electrode and the conductive layer.
  • a pressure sensing detecting chip that determines the magnitude of the pressure at the touch position.
  • the in-cell touch panel provided by the embodiment of the present disclosure further includes: a wire corresponding to each of the pressure sensing electrodes, and a one-to-one correspondence with each of the pressure sensing electrodes Connection point;
  • Each of the conductive connection points is located in a peripheral area of the in-cell touch screen surrounding the display area;
  • the metal traces in the peripheral region and the pressure sensing are detected by the conductive connection points in one-to-one correspondence
  • the chip is electrically connected.
  • the peripheral area has four sides;
  • Each of the conductive connection points is distributed at one side of the peripheral area
  • the conductive connection points are distributed on each side of the peripheral area; and the conductive connection points corresponding to the pressure sensing detecting electrodes are distributed on the side of the peripheral area closest to the pressure sensing detecting electrode At the side.
  • the method further includes: a black matrix layer between the substrate substrate and the opposite substrate;
  • An orthographic projection of each of the wires on the base substrate is located in a region where the black matrix layer is orthographically projected on the substrate.
  • each of the wires is disposed in the same layer as each of the pressure sensing electrodes.
  • each of the organic electroluminescent pixel units includes an anode layer, a light emitting layer and a cathode layer which are sequentially disposed on the base substrate;
  • the cathode layer is divided into a plurality of independent self-capacitance electrodes
  • the in-cell touch panel further includes a capacitance detecting chip for applying a capacitance detecting signal to the self-capacitance electrode during a capacitive touch phase, and determining a touch position by detecting a change in a capacitance value of the self-capacitance electrode.
  • an embodiment of the present disclosure further provides a display device including an in-cell touch panel, wherein the in-cell touch panel includes: a substrate substrate, an opposite substrate disposed opposite to the substrate substrate, and a location a plurality of organic electroluminescent pixel units arranged in a matrix on a side of the opposite substrate facing the opposite substrate, and between the organic electroluminescent pixel unit and the base substrate and each of the a pixel circuit corresponding to the electroluminescent pixel unit, wherein each of the pixel circuits includes at least one storage capacitor composed of a first electrode plate and a second electrode plate sequentially located on the base substrate;
  • the in-cell touch panel includes a plurality of the pressure sensing electrodes; the pressure sensing electrodes are located at a conductive layer under the substrate substrate forms a capacitor structure;
  • the in-cell touch panel further includes a method for applying a pressure sensing detection signal to the pressure sensing detecting electrode during a pressure sensing touch phase, and detecting a change in a capacitance value between the pressure sensing detecting electrode and the conductive layer.
  • a pressure sensing detecting chip that determines the magnitude of the pressure at the touch position.
  • the organic electroluminescent pixel unit includes an anode layer, a light emitting layer and a cathode layer which are sequentially disposed on the base substrate;
  • the cathode layer is divided into a plurality of independent self-capacitance electrodes
  • the in-cell touch panel further includes a capacitance detecting chip for applying a capacitance detecting signal to the self-capacitance electrode during a capacitive touch phase, and determining a touch position by detecting a change in a capacitance value of the self-capacitance electrode.
  • the area occupied by each of the pressure sensing electrodes on the base substrate gradually increases.
  • the display device further includes: a wire corresponding to each of the pressure sensing electrodes, and a conductive connection point corresponding to each of the pressure sensing electrodes; wherein
  • Each of the conductive connection points is located in a peripheral area of the in-cell touch screen surrounding the display area;
  • the metal traces in the peripheral region and the pressure sensing are detected by the conductive connection points in one-to-one correspondence
  • the chip is electrically connected.
  • the peripheral area has four sides;
  • Each of the conductive connection points is distributed at one side of the peripheral area.
  • the peripheral area has four sides;
  • the conductive connection points are distributed on each side of the peripheral area, and the conductive connection points corresponding to the pressure sensing detecting electrodes are distributed on the side of the peripheral area closest to the pressure sensing detecting electrode At the side.
  • the display device further includes: a black matrix layer between the substrate substrate and the opposite substrate;
  • An orthographic projection of each of the wires on the base substrate is located in a region where the black matrix layer is orthographically projected on the substrate.
  • the conductive layer is a supporting backplane of the in-cell touch panel.
  • the embodiment of the present disclosure further provides a driving method of any one of the above-mentioned in-cell touch panels, which includes at least a display phase and a pressure sensitive touch phase in one frame time;
  • the pressure sensing detecting chip applies a pressure sensing detection signal to the pressure sensing detecting electrode, and determines by detecting a change in a capacitance value between the pressure sensing detecting electrode and the conductive layer. The amount of pressure at the touch location.
  • the one-frame time further includes: a capacitive touch phase; wherein,
  • the pressure sensing chip applies a capacitance detection signal to the self capacitance electrode, and determines a touch position by detecting a change in a capacitance value of the self capacitance electrode.
  • the organic electroluminescent pixel unit is in a non-light emitting state.
  • the driving method further includes: applying the capacitance detection signal to a ground electrode corresponding to the self-capacitance electrode.
  • An in-cell touch panel, a driving method thereof and a display device include: a substrate substrate, a counter substrate disposed opposite to the substrate substrate, and a plurality of organic electro-optic arrays arranged on the substrate substrate a luminescence pixel unit and a pixel circuit corresponding to the organic electroluminescence pixel unit, wherein each of the pixel circuits includes at least a first electrode plate and a second electrode plate sequentially disposed on the substrate substrate; by multiplexing the plurality of first electrode plates a pressure sensing detecting electrode and a conductive layer formed under the substrate When the position of the pressure sensing detecting electrode is pressed, the change in the distance between the pressure sensing detecting electrode and the conductive layer causes a change in capacitance between the two, and therefore, the pressure sensing detecting chip is increased in pressure.
  • a pressure sensing detection signal is applied to the pressure sensing detecting electrode, and the pressure of the touch position is determined by detecting a change in the capacitance value between the pressure sensing detecting electrode and the conductive layer, and the pressure sensing function can be realized.
  • the plurality of first electrode plates in the organic electroluminescent display panel of the related art are multiplexed into one pressure sensing detecting electrode, and the pressure sensing detecting electrode and the conductive layer located under the substrate substrate are used to realize the pressure sensitive touch function.
  • the structural design of the display device is less modified, and is not limited by assembly tolerances, which is advantageous for achieving better detection accuracy and saving production costs.
  • FIG. 1 is a schematic top plan view of an in-cell touch panel provided by some embodiments of the present disclosure
  • FIG. 2a is a schematic cross-sectional structural view of an in-cell touch panel provided by some embodiments of the present disclosure
  • FIG. 2b is a second schematic cross-sectional view of an in-cell touch panel provided by some embodiments of the present disclosure
  • 2c is a third schematic cross-sectional view of the in-cell touch panel provided by some embodiments of the present disclosure.
  • FIG. 2 is a schematic diagram of an organic electroluminescent pixel unit in an in-cell touch screen according to some embodiments of the present disclosure
  • FIG. 3 is a graph showing a relationship between charging time and voltage of a pressure sensitive detecting electrode in an in-cell touch panel according to some embodiments of the present disclosure
  • FIG. 4 is a schematic diagram of driving timing of an in-cell touch panel according to some embodiments of the present disclosure.
  • Some embodiments of the present disclosure provide an in-cell touch panel, as shown in FIG. 1 to FIG. 2b, including: a substrate substrate 100, a counter substrate 200 disposed opposite the substrate substrate 100, and a substrate substrate 100 a plurality of organic electroluminescent pixel units 110 arranged in a matrix facing the opposite substrate 200, and a portion between the organic electroluminescent pixel unit 110 and the base substrate 100 and corresponding to the respective organic electroluminescent pixel units 110 a pixel circuit 500, wherein each pixel circuit 500 includes at least one storage capacitor composed of a first electrode plate 120 and a second electrode plate 130 sequentially disposed on the base substrate 100;
  • the adjacent plurality of first electrode plates 120 are multiplexed into one pressure sensing detecting electrode 300; the in-cell touch panel includes a plurality of pressure sensing detecting electrodes 300; and the pressure sensing detecting electrodes 300 are located below the substrate substrate 100.
  • the conductive layer 400 forms a capacitor structure;
  • the in-cell touch panel further includes a pressure sensing detection signal applied to the pressure sensing electrode 300 during the pressure sensing touch phase, and the touch position is determined by detecting a change in the capacitance value between the pressure sensing electrode 300 and the conductive layer 400.
  • Pressure-sensitive pressure sensing chip
  • Some embodiments of the present disclosure provide an in-cell touch panel, including: a substrate substrate, an opposite substrate disposed opposite to the substrate substrate, a plurality of organic electroluminescent pixel units arranged in a matrix on the substrate substrate, and a pixel circuit corresponding to the organic electroluminescent pixel unit, wherein each pixel circuit includes at least a first electrode plate and a second electrode plate sequentially disposed on the base substrate; and multiplexing the plurality of first electrode plates into one pressure sensing detecting electrode And forming a capacitor structure with the conductive layer disposed under the base substrate; when the position of the pressure sensing electrode is pressed, the distance between the pressure sensing electrode and the conductive layer changes to bring about a capacitance between the two.
  • the pressure sensing detecting chip is added, and a pressure sensing signal is applied to the pressure sensing electrode during the pressure sensing phase, and the pressure of the touch position is determined by detecting a change in the capacitance between the pressure sensing electrode and the conductive layer. Size, you can achieve pressure touch function.
  • the plurality of first electrode plates in the organic electroluminescent display panel of the related art are multiplexed into one pressure sensing detecting electrode, and the pressure sensing detecting electrode and the conductive layer located under the substrate substrate are used to realize the pressure sensitive touch function.
  • the structural design of the display device is less modified, and is not limited by assembly tolerances, which is advantageous for achieving better detection accuracy and saving production costs.
  • each of the organic electroluminescent pixel units includes an anode layer, a light emitting layer and a cathode layer sequentially disposed on the substrate, and is a top emission type. That is, the light emitted by the organic electroluminescent pixel unit is emitted from one side of the cathode layer.
  • the spacing between each of the pressure sensing electrodes 300 and the conductive layer 400 forming the capacitor structure is d.
  • C ⁇ S / 4 ⁇ kd
  • ⁇ the dielectric constant of the insulating electrolyte at the spacing d
  • S the pressure sensing detecting electrode 300
  • the facing area of the capacitor structure formed with the conductive layer 400 k is an electrostatic force constant
  • d is the pitch of the pressure sensitive detecting electrode 300 and the conductive layer 400.
  • the pitch d is reduced, so that the capacitance formed between the pressure sensing detecting electrode 300 and the conductive layer 400 is increased, and thus the change of the capacitance value can be determined by detecting the change in the capacitance value.
  • the size of the pressure is reduced, so that the capacitance formed between the pressure sensing detecting electrode 300 and the conductive layer 400 is increased, and thus the change of the capacitance value can be determined by detecting the change in the capacitance value.
  • Vt V0+(Vu-V0)*[1-exp(-t/RC)], where Vt is the voltage value on the capacitor at any time t, and V0 is the initial voltage on the capacitor Value, Vu is the termination voltage value after the capacitor is full, and RC is the time constant of the RC circuit.
  • the pressure sensing chip can detect the capacitance structure of the electrode and the conductive layer according to the pressure sensing. The capacitance values of the capacitor structure are different under different touch pressures, resulting in different charging time of the capacitor structure, and detecting the capacitance by detecting the difference of the charging time. Change to determine the magnitude of the pressure.
  • the pressure sensing detecting chip applies a pressure sensing detection signal to the pressure sensing detecting electrode, so that the capacitive structure formed by the pressure sensing detecting electrode and the conductive layer generates a coupling capacitance, which is due to the RC delay of the signal, as shown in FIG. 3 .
  • the horizontal axis represents the time t
  • the vertical axis represents the voltage V across the capacitor structure.
  • the pressure sensing detecting chip can detect the capacitance structure formed by the pressure sensing detecting electrode and the conductive layer.
  • the change of the charging time indirectly feeds back the pressure of the touch position, so that the in-cell touch screen realizes the pressure sensitive touch function.
  • the plurality of first electrode plates in the pixel circuit corresponding to the organic electroluminescent pixel unit are grouped as one pressure sensing detecting electrode.
  • a display phase and a pressure sensitive touch phase time-division driving method are required, and in the specific implementation, the display driving chip and the pressure sensing chip can be integrated into One chip, which can further reduce production costs.
  • the in-cell touch panel generally fixes the frame area surrounding the display area to the outer frame of the display device, when the center area and the edge area of the in-cell touch screen are pressed by the same force, the pressure sensing of the center area is detected. It is easier for the electrode to convert the pressure into a change in the distance between the pressure sensing electrode and the conductive layer, ie the central region is more sensitive to pressure sensing than the edge region. Therefore, in order to make the accuracy of the pressure sensing of the entire display area of the in-cell touch panel relatively uniform, in the specific implementation, the embedded touch screen provided by some embodiments of the present disclosure may be pointed along the central area of the substrate.
  • the direction of the edge region is such that the area occupied by each of the pressure sensing electrodes on the substrate is gradually increased.
  • the capacitance value of the pressure sensitive detecting electrode can be relatively increased, and the change in the capacitance value can be improved.
  • each of the pressure sensing electrodes generally needs to be electrically connected to the pressure sensing chip by a wire corresponding thereto. Therefore, in a specific implementation, in the above-mentioned embedded touch screen provided by some embodiments of the present disclosure, 2a and FIG. 2b, further including: a wire 310 corresponding to each of the pressure sensing electrodes 300, and a conduction connection point 140 corresponding to each of the pressure sensing electrodes 300; wherein each of the conduction points 140
  • the in-cell touch panel is disposed in the peripheral region 160 of the display region 150; each of the pressure sensing electrodes 300 is connected to the conductive connection point 140 through the wire 310, and is located in the peripheral region 160 through the one-to-one correspondence with the conductive connection point 140.
  • metal trace is electrically connected to the pressure sensing chip.
  • each of the pressure sensing electrodes and the pressure sensing chip are electrically connected, and the wire and the metal wires are not affected by the aperture ratio of the in-cell touch panel.
  • metal traces 170, pressure sense detection chip 180, and conductive connection points 140 may be connected as shown in Figure 2c.
  • the peripheral region 160 has four sides, and the conductive connection points 140 are in the peripheral region 160.
  • the side edges are distributed; and the conductive connection points 140 corresponding to the respective pressure sensitive detecting electrodes 300 are distributed at the side edges of the peripheral region 160 which is closest to the pressure sensitive detecting electrodes 300. In this way, the attenuation of the signal in the wire is reduced, and the transmission stability of the signal is improved.
  • each of the conductive connection points 140 is distributed at one side of the peripheral area. In this way, it is only necessary to arrange the wires in one direction, which simplifies the preparation process and improves the production efficiency.
  • the method further includes: A black matrix layer between the substrates; an orthographic projection of each of the wires on the substrate is located in a region where the black matrix layer is orthographically projected on the substrate.
  • the black matrix layer may be specifically disposed on a side of the substrate facing the opposite substrate, or may be disposed on the opposite substrate.
  • One side of the base substrate is not limited herein.
  • each of the wires is disposed in the same layer as each of the pressure sensing electrodes. In this way, it is not necessary to add an additional process for preparing each wire during preparation, and only one patterning process is required to form each wire and each pressure sensing power. Extreme graphics can save on manufacturing costs.
  • the organic electroluminescent pixel unit includes an anode layer 1101, a light emitting layer 1102 and a cathode layer 1103 which are sequentially disposed on the substrate.
  • the cathode layer 1103 is divided into a plurality of mutually independent self-capacitance electrodes 1104;
  • the in-cell touch panel further includes a capacitor detection signal applied to the self-capacitance electrode 1104 during the capacitive touch phase, and by detecting the capacitance value of the self-capacitance electrode.
  • the capacitance detecting chip 190 is changed to determine the touch position.
  • the self-capacitance electrode 1104 and the capacitance detecting chip 190 may be connected as shown in FIG. 2d.
  • the display driving chip and the capacitance detecting for display can also be used.
  • the chip is integrated into one chip, which can further reduce production costs.
  • a pressure sensitive touch function is realized;
  • the cathode layer in the illuminating pixel unit is multiplexed as a self-capacitance electrode, and the capacitive touch function is realized. Therefore, in order to reduce mutual interference during the display phase, the capacitive touch phase, and the pressure-sensitive touch phase, in a specific implementation, a display is required.
  • the phase, the capacitive touch phase and the pressure sensitive touch phase drive mode wherein the capacitance detecting chip applies a capacitance detecting signal to the self-capacitance electrode in the capacitive touch phase, and the pressure sensing detecting chip touches the pressure sensing detecting electrode in the pressure sensing phase A pressure sense detection signal is applied.
  • the display driving chip, the capacitance detecting chip, and the pressure sensing detecting chip for display into one chip, which can further reduce the production cost.
  • some embodiments of the present disclosure further provide a driving method for the in-cell touch panel, which includes at least a display phase and a pressure sensitive touch phase in one frame time;
  • the pressure sensing chip applies a pressure sensing signal to the pressure sensing electrode, and determines the pressure of the touch position by detecting a change in the capacitance between the pressure sensing electrode and the conductive layer.
  • the pressure sensing chip in the pressure sensitive touch phase, applies a pressure sensitive detection signal to the pressure sensing detecting electrode while applying a fixed value voltage signal to the conductive layer.
  • the distance between the pressure sensing detecting electrode and the conductive layer is changed, thereby causing a change in the capacitance value of the capacitance structure formed between the two, so that the capacitance
  • the charging time changes, so the pressure sensing chip can detect the pressure sensing electrode by detecting
  • the change of the charging time of the capacitor determines the pressure of the touch position, and realizes the pressure sensing function.
  • the organic electroluminescent pixel unit may be in a state of no light emission during the pressure sensing touch phase.
  • the capacitive touch is further included in the driving method of the organic electroluminescent pixel unit.
  • the control phase wherein, in the capacitive touch phase, the capacitance detecting chip applies a capacitance detecting signal to the self-capacitance electrode, and determines the touch position by detecting a change in the capacitance value of the self-capacitance electrode.
  • the capacitance of the self-capacitance electrode to the ground electrode (referring to other electrodes and signal lines on the substrate substrate other than the self-capacitance electrode) is larger, and the accuracy of the capacitive touch is smaller, so
  • the capacitance detecting chip in the capacitive touch phase, not only applies a capacitance detecting signal to the self-capacitance electrode, but also applies the same capacitance detecting signal to the ground electrode corresponding to the self-capacitance electrode, thereby making the self-capacitance
  • the base capacitance of the electrode can theoretically be zero.
  • the driving method provided by some embodiments of the present disclosure is described in detail below by a driving timing chart of one frame time. Only the signal Sensor applied on the pressure sensing detecting electrode in one frame time is applied in FIG. 4, and the conductive layer is applied.
  • the signal Ve is a timing chart of the signal Vss applied from the capacitor electrode and the signal Gate applied on one of the gate electrodes corresponding to the self-capacitance electrode and the signal Data applied on one data line. It should be noted that the present embodiment is intended to better explain the present disclosure, but does not limit the present disclosure.
  • the one-frame time includes: a display phase t1, a capacitive touch phase t2, and a pressure-sensitive touch phase t3;
  • the signal Sensor applied on the pressure sensitive detecting electrode, the signal Ve applied on the conductive layer, the signal Vss applied on the cathode layer, the signal Gate applied on the gate line, and the signal Data applied on the data line are all internal.
  • the signal required for the embedded touch screen to display normally.
  • the signal Vss applied from the self-capacitance electrode, the signal Sensor applied on the pressure sensing electrode, the signal Ve applied on the conductive layer, the signal Gate applied on the gate line, and the signal applied on the data line Data Both are capacitance detection signals.
  • the signal Sensor applied on the pressure sensitive detecting electrode is a pressure sensitive detecting signal, a signal Ve applied on the conductive layer, a signal Vss applied on the cathode layer, a signal Gate applied on the gate line, and a data line.
  • the applied signal Data is a fixed voltage signal.
  • some embodiments of the present disclosure also provide a display device, including the present Some of the disclosed embodiments provide the above-described in-cell touch screen.
  • the 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.
  • Other indispensable components of the display device are understood by those skilled in the art, and are not described herein, nor should they be construed as limiting the disclosure.
  • the conductive layer is a supporting back plate of the in-cell touch panel.
  • the supporting backplane may be a metal frame that is coated on the outer side of the in-cell touch panel, or may be a metal patch that is applied under the base substrate of the in-cell touch panel, and is not described herein.
  • the support backplane may also be a mobile phone middle frame provided with a conductive material.
  • Some embodiments of the present disclosure provide an in-cell touch panel, a driving method thereof, and a display device, including: a substrate substrate, an opposite substrate disposed opposite to the substrate substrate, and a plurality of matrixes arranged on the substrate substrate An electroluminescence pixel unit and a pixel circuit corresponding to the organic electroluminescence pixel unit, wherein each pixel circuit includes at least a first electrode plate and a second electrode plate sequentially disposed on the substrate substrate; It is used as a pressure sensing electrode and forms a capacitor structure with a conductive layer disposed under the substrate; when the pressure sensing electrode is pressed, the distance between the pressure sensing electrode and the conductive layer changes.
  • the pressure sensing detection chip is added to apply a pressure sensing signal to the pressure sensing electrode during the pressure sensing phase, and the capacitance value between the electrode and the conductive layer is detected by detecting the pressure sensing.
  • the pressure sensitive touch function can be realized.
  • the plurality of first electrode plates in the organic electroluminescent organic electroluminescent display panel of the related art are multiplexed into one pressure sensing detecting electrode, and the pressure sensing electrode and the conductive layer under the substrate substrate are used to realize the pressure sensing touch.
  • the control function has little change to the structural design of the display device, and is not limited by the assembly tolerance, which is advantageous for achieving better detection accuracy and saving production cost.

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Abstract

一种内嵌式触摸屏、其驱动方法及显示装置，通过将多个第一电极板（120）复用为一个压感检测电极（300），并与设置在衬底基板（100）下方的导电层（400）形成电容结构；当压感检测电极（300）所在位置被按压时，压感检测电极（300）与导电层（400）之间的距离产生变化随之带来两者之间电容的变化。

Description

一种内嵌式触摸屏、其驱动方法及显示装置
相关申请的交叉引用
本申请主张在2015年10月26日在中国提交的中国专利申请号No.201510702597.9的优先权，其全部内容通过引用包含于此。
技术领域
本公开涉及显示技术领域，特别涉及一种内嵌式触摸屏、其驱动方法及显示装置。
背景技术
压力感应技术是指对外部受力能够实施探测的技术，这项技术很久前就运用在工控，医疗等领域。目前，在显示领域尤其是手机或平板领域实现压力感应的方式是在液晶显示面板的背光部分或者手机的中框部分增加额外的机构来实现，这种设计需要对液晶显示面板或者手机的结构设计做出改动，而且由于装配公差较大，这种设计的探测准确性也受到了限制。
因此，如何在显示面板硬件改动较小的情况下实现探测精度较高的压力感应，是本领域技术人员亟需解决的问题。
发明内容
本公开实施例提供一种内嵌式触摸屏、其驱动方法及显示装置，通过将多个第一电极板复用为一个压感检测电极，利用压感检测电极和位于衬底基板下方的导电层，实现了更好的探测精度的压感触控功能，降低了装配公差与工艺流程的复杂程度。
因此，本公开实施例提供一种内嵌式触摸屏，包括：衬底基板、与所述衬底基板相对设置的对向基板、位于所述衬底基板面向所述对向基板一侧的呈矩阵排列的多个有机电致发光像素单元、以及位于所述有机电致发光像素单元与所述衬底基板之间且与各所述有机电致发光像素单元对应的像素电路，其中各所述像素电路至少包括一个由依次位于所述衬底基板上的第一电极板和第二电极板组成的存储电容；
以相邻的多个所述第一电极板为一组复用为一个压感检测电极；所述内嵌式触摸屏包括多个所述压感检测电极；所述压感检测电极与位于所述衬底基板下方的导电层形成电容结构；
所述内嵌式触摸屏还包括用于在压感触控阶段对所述压感检测电极施加压感检测信号，并通过检测所述压感检测电极与所述导电层之间的电容值的变化来判断触控位置的压力大小的压感检测芯片。
可选的，在本公开实施例提供的上述内嵌式触摸屏中，沿所述衬底基板的中心区域指向边缘区域的方向，各所述压感检测电极所在区域在所述衬底基板上的所占面积逐渐变大。
可选的，在本公开实施例提供的上述内嵌式触摸屏中，还包括：与各所述压感检测电极一一对应的导线，以及与各所述压感检测电极一一对应的导通连接点；其中，
各所述导通连接点位于所述内嵌式触摸屏围绕显示区域的周边区域内；
各所述压感检测电极通过所述导线与所述导通连接点连接后，通过与所述导通连接点一一对应的且位于所述周边区域内的金属走线与所述压感检测芯片电性连接。
可选的，在本公开实施例提供的上述内嵌式触摸屏中，所述周边区域具有四个侧边；
各所述导通连接点均分布于所述周边区域的一个侧边处；或，
所述导通连接点在所述周边区域的各侧边均有分布；且与各所述压感检测电极对应的导通连接点分布在与所述压感检测电极距离最近的周边区域的侧边处。
可选的，在本公开实施例提供的上述内嵌式触摸屏中，还包括：位于所述衬底基板与所述对向基板之间的黑矩阵层；
各所述导线在所述衬底基板的正投影位于所述黑矩阵层在所述衬底基板的正投影所在的区域内。
可选的，在本公开实施例提供的上述内嵌式触摸屏中，各所述导线与各所述压感检测电极同层设置。
可选的，在本公开实施例提供的上述内嵌式触摸屏中，各所述有机电致发光像素单元包括依次位于所述衬底基板上的阳极层、发光层与阴极层；
所述阴极层被分割为多个相互独立的自电容电极；
所述内嵌式触摸屏还包括用于在电容触控阶段对所述自电容电极施加电容检测信号，并通过检测所述自电容电极的电容值的变化来确定触控位置的电容检测芯片。
相应地，本公开实施例还提供了一种显示装置，包括内嵌式触摸屏，其中，所述内嵌式触摸屏包括：衬底基板、与所述衬底基板相对设置的对向基板、位于所述衬底基板面向所述对向基板一侧的呈矩阵排列的多个有机电致发光像素单元、以及位于所述有机电致发光像素单元与所述衬底基板之间且与各所述有机电致发光像素单元对应的像素电路，其中各所述像素电路至少包括一个由依次位于所述衬底基板上的第一电极板和第二电极板组成的存储电容；其中，
以相邻的多个所述第一电极板为一组复用为一个压感检测电极；所述内嵌式触摸屏包括多个所述压感检测电极；所述压感检测电极与位于所述衬底基板下方的导电层形成电容结构；
所述内嵌式触摸屏还包括用于在压感触控阶段对所述压感检测电极施加压感检测信号，并通过检测所述压感检测电极与所述导电层之间的电容值的变化来判断触控位置的压力大小的压感检测芯片。
可选的，所述有机电致发光像素单元包括依次位于所述衬底基板上的阳极层、发光层与阴极层；
所述阴极层被分割为多个相互独立的自电容电极；
所述内嵌式触摸屏还包括用于在电容触控阶段对所述自电容电极施加电容检测信号，并通过检测所述自电容电极的电容值的变化来确定触控位置的电容检测芯片。
可选的，沿所述衬底基板的中心区域指向边缘区域的方向，各所述压感检测电极所在区域在所述衬底基板上的所占面积逐渐变大。
可选的，所述显示装置还包括：与各所述压感检测电极一一对应的导线，以及与各所述压感检测电极一一对应的导通连接点；其中，
各所述导通连接点位于所述内嵌式触摸屏围绕显示区域的周边区域内；
各所述压感检测电极通过所述导线与所述导通连接点连接后，通过与所述导通连接点一一对应的且位于所述周边区域内的金属走线与所述压感检测芯片电性连接。
可选的，所述周边区域具有四个侧边；
各所述导通连接点均分布于所述周边区域的一个侧边处。
可选的，所述周边区域具有四个侧边；
所述导通连接点在所述周边区域的各侧边均有分布，且与各所述压感检测电极对应的导通连接点分布在与所述压感检测电极距离最近的周边区域的侧边处。
可选的，所述显示装置还包括：位于所述衬底基板与所述对向基板之间的黑矩阵层；
各所述导线在所述衬底基板的正投影位于所述黑矩阵层在所述衬底基板的正投影所在的区域内。
可选的，在本公开实施例提供的上述显示装置中，所述导电层为所述内嵌式触摸屏的支撑背板。
相应地，本公开实施例还提供了一种上述任一种内嵌式触摸屏的驱动方法，一帧时间中至少包括：显示阶段和压感触控阶段；其中，
在所述压感触控阶段，所述压感检测芯片对所述压感检测电极施加压感检测信号，并通过检测所述压感检测电极与所述导电层之间的电容值的变化来判断触控位置的压力大小。
可选的，在本公开实施例提供的上述驱动方法中，一帧时间中还包括：电容触控阶段；其中，
在所述电容触控阶段，所述压感检测芯片对所述自电容电极施加电容检测信号，并通过检测所述自电容电极的电容值的变化来确定触控位置。
可选的，在所述压感触控阶段，所述有机电致发光像素单元处于不发光状态。
可选的，所述驱动方法还包括：对所述自电容电极对应的地电极施加所述电容检测信号。
本公开实施例提供的内嵌式触摸屏、其驱动方法及显示装置，包括：衬底基板、与衬底基板相对设置的对向基板、位于衬底基板上的呈矩阵排列的多个有机电致发光像素单元以及与有机电致发光像素单元对应的像素电路，其中各像素电路至少包括依次位于衬底基板上的第一电极板和第二电极板；通过将多个第一电极板复用为一个压感检测电极，并与设置在衬底基板下方的导电层形 成电容结构；当压感检测电极所在位置被按压时，压感检测电极与导电层之间的距离产生变化随之带来两者之间电容的变化，因此，增加压感检测芯片，在压感触控阶段对压感检测电极施加压感检测信号，并通过检测压感检测电极与导电层之间的电容值的变化来判断触控位置的压力大小，可以实现压感触控功能。这样将相关技术中的有机电致发光显示面板中的多个第一电极板复用为一个压感检测电极，利用压感检测电极和位于衬底基板下方的导电层实现压感触控功能，对显示装置的结构设计改动较小，不会受到装配公差的限制，有利于实现更好的探测精度，且有利于节省制作成本。
附图说明
图1为本公开的一些实施例提供的内嵌式触摸屏的俯视结构示意图；
图2a为本公开的一些实施例提供的内嵌式触摸屏中的剖面结构示意图之一；
图2b为本公开的一些实施例提供的内嵌式触摸屏中的剖面结构示意图之二；
图2c为本公开的一些实施例提供的内嵌式触摸屏中的剖面结构示意图之三；
图2d为本公开的一些实施例提供的内嵌式触摸屏中的有机电致发光像素单元的示意图；
图3为本公开的一些实施例提供的内嵌式触摸屏中的压感检测电极的充电时间与电压的关系的坐标图；
图4为本公开的一些实施例提供的内嵌式触摸屏的驱动时序示意图。
具体实施方式
下面结合附图，对本公开实施例提供的内嵌式触摸屏、其驱动方法及显示装置的具体实施方式进行详细地说明。
附图中各膜层的厚度和形状不反映真实比例，目的只是示意说明本公开内容。
本公开的一些实施例提供一种内嵌式触摸屏，如图1至图2b所示，包括：衬底基板100、与衬底基板100相对设置的对向基板200、位于衬底基板100 面向对向基板200一侧的呈矩阵排列的多个有机电致发光像素单元110、以及位于有机电致发光像素单元110与衬底基板100之间且与各有机电致发光像素单元110对应的像素电路500，其中各像素电路500至少包括一个由依次位于衬底基板100上的第一电极板120和第二电极板130组成的存储电容；
以相邻的多个第一电极板120为一组复用为一个压感检测电极300；内嵌式触摸屏包括多个压感检测电极300；压感检测电极300与位于衬底基板100下方的导电层400形成电容结构；
内嵌式触摸屏还包括用于在压感触控阶段对压感检测电极300施加压感检测信号，并通过检测压感检测电极300与导电层400之间的电容值的变化来判断触控位置的压力大小的压感检测芯片。
本公开的一些实施例提供的内嵌式触摸屏，包括：衬底基板、与衬底基板相对设置的对向基板、位于衬底基板上的呈矩阵排列的多个有机电致发光像素单元以及与有机电致发光像素单元对应的像素电路，其中各像素电路至少包括依次位于衬底基板上的第一电极板和第二电极板；通过将多个第一电极板复用为一个压感检测电极，并与设置在衬底基板下方的导电层形成电容结构；当压感检测电极所在位置被按压时，压感检测电极与导电层之间的距离产生变化随之带来两者之间电容的变化，因此，增加压感检测芯片，在压感触控阶段对压感检测电极施加压感检测信号，并通过检测压感检测电极与导电层之间的电容值的变化来判断触控位置的压力大小，可以实现压感触控功能。这样将相关技术中的有机电致发光显示面板中的多个第一电极板复用为一个压感检测电极，利用压感检测电极和位于衬底基板下方的导电层实现压感触控功能，对显示装置的结构设计改动较小，不会受到装配公差的限制，有利于实现更好的探测精度，且有利于节省制作成本。
需要说明的是，在本公开的一些实施例提供的上述内嵌式触摸屏中，各有机电致发光像素单元包括依次位于衬底基板上的阳极层、发光层与阴极层，且为顶发射型，即有机电致发光像素单元所发的光由阴极层一侧出射。
具体地，在本公开的一些实施例提供的上述内嵌式触摸屏中，如图1所示，形成电容结构的各压感检测电极300与导电层400之间的间距为d。根据电容公式：C＝εS/4πkd，其中，C为压感检测电极300与导电层400形成的电容结构的电容，ε为处于间距d处的绝缘电解质的介电常数，S为压感检测电极300 与导电层400形成的电容结构的正对面积，k为静电力常数，d为压感检测电极300与导电层400的间距。当压感检测电极300所在位置被按压时，间距d就会减小，这样压感检测电极300与导电层400之间形成的电容就会增大，因此通过检测此电容值的变化就可以确定出压力的大小。
进一步地，根据电容的充电公式：Vt＝V0+(Vu-V0)*[1-exp(-t/RC)]，其中，Vt为任意时间t电容上的电压值，V0为电容上的初始电压值，Vu为电容充满后终止电压值，RC为RC电路的时间常数。压感检测芯片可以根据压感检测电极与导电层形成的电容结构，在不同的触控压力下电容结构的电容值不同，导致电容结构的充电时间不同，通过检测充电时间的差异来检测电容的变化，以确定出压力的大小。具体地，在压感检测阶段，压感检测芯片对压感检测电极施加压感检测信号，使压感检测电极与导电层形成的电容结构产生耦合电容，由于信号的RC延迟作用，如图3所示，其中横轴表示时间t，纵轴表示电容结构两端的电压V，假设在无触控压力时电容结构的充电时间为T1，那么当有触控压力时，压感检测电极与导电层之间的距离就变小，从而使电容结构的电容值C变大，对应的充电时间就会变长为T2，因此压感检测芯片可以通过检测压感检测电极与导电层形成的电容结构的充电时间的变化来间接反馈触控位置的压力大小，从而使内嵌式触摸屏实现压感触控功能。
具体地，由于以与有机电致发光像素单元对应的像素电路中的多个第一电极板为一组作为一个压感检测电极，在本公开的一些实施例提供的上述内嵌式触摸屏中，为了减少显示阶段和压感触控阶段的相互干扰，需要采用显示阶段和压感触控阶段分时驱动的方式，并且，在具体实施时还可以将显示用的显示驱动芯片和压感检测芯片整合为一个芯片，这样可以进一步降低生产成本。
进一步地，由于内嵌式触摸屏一般是将围绕显示区域的边框区域固定于显示装置的外框上，因此，采用相同力度按压内嵌式触摸屏的中心区域和边缘区域时，中心区域的压感检测电极更容易将压力转换为压感检测电极与导电层之间的距离变化，即中心区域比边缘区域对于压力的感应更加敏感。因此，为了使内嵌式触摸屏的整个显示区域压力感应的精准度相对均匀，在具体实施时，在本公开的一些实施例提供的上述内嵌式触摸屏中，可以沿衬底基板的中心区域指向边缘区域的方向，使各压感检测电极所在区域在衬底基板上的所占面积逐渐变大。这样，对于内嵌式触摸屏中压力感应的精准度相对较差的周边区域， 将压感检测电极的面积变大，可以使压感检测电极的电容值相对变大，对于电容值的变化也会有所提高。
进一步地，各压感检测电极一般需要通过与其对应的导线与压感检测芯片实现电性连接，因此，在具体实施时，在本公开的一些实施例提供的上述内嵌式触摸屏中，如图2a和图2b所示，还包括：与各压感检测电极300一一对应的导线310，以及与各压感检测电极300一一对应的导通连接点140；其中，各导通连接点140位于内嵌式触摸屏围绕显示区域150的周边区域160内；各压感检测电极300通过导线310与导通连接点140连接后，通过与导通连接点140一一对应的且位于周边区域160内的金属走线与压感检测芯片电性连接。这样实现了各压感检测电极与压感检测芯片电性连接，并且使导线与金属走线不影响内嵌式触摸屏的开口率。在本公开的一些实施例中，金属走线170、压感检测芯片180和导通连接点140可以如图2c所示的方式连接。
进一步地，在具体实施时，在本公开的一些实施例提供的上述内嵌式触摸屏中，如图2a所示，周边区域160具有四个侧边，导通连接点140在周边区域160的各侧边均有分布；且与各压感检测电极300对应的导通连接点140分布在与压感检测电极300距离最近的周边区域160的侧边处。这样，降低了导线中信号的衰减，提高了信号的传输稳定性。
或者，在具体实施时，在本公开的一些实施例提供的上述内嵌式触摸屏中，如图2b所示，各导通连接点140均分布于周边区域的一个侧边处。这样，只需将导线沿一个方向排布，简化制备工艺，提高生产效率。
进一步地，为了不影响内嵌式触摸屏在显示时光透过率的均一性，在具体实施时，在本公开的一些实施例提供的上述内嵌式触摸屏中，还包括：位于衬底基板与对向基板之间的黑矩阵层；各导线在衬底基板的正投影位于黑矩阵层在衬底基板的正投影的所在区域内。
进一步地，在具体实施时，在本公开的一些实施例提供的上述内嵌式触摸屏中，黑矩阵层具体可以设置在衬底基板面向对向基板的一侧，也可以设置在对向基板面向衬底基板的一侧，在此不作限定。
进一步地，在具体实施时，在本公开的一些实施例提供的上述内嵌式触摸屏中，各导线与各压感检测电极同层设置。这样，在制备时不需要增加额外的制备各导线的工艺，只需要通过一次构图工艺即可形成各导线与各压感检测电 极的图形，能够节省制备成本。
进一步地，如图2d所示，在本公开实施例提供的上述内嵌式触摸屏中，有机电致发光像素单元包括依次位于衬底基板上的阳极层1101、发光层1102与阴极层1103；其中，阴极层1103被分割为多个相互独立的自电容电极1104；内嵌式触摸屏还包括用于在电容触控阶段对自电容电极1104施加电容检测信号，并通过检测自电容电极的电容值的变化来确定触控位置的电容检测芯片190。在本公开的一些实施例中，自电容电极1104与电容检测芯片190可以如图2d所示的方式连接。
具体地，由于将有机电致发光像素单元中的阴极层复用为自电容电极，在本公开的一些实施例提供的上述内嵌式触摸屏中，还可以将显示用的显示驱动芯片和电容检测芯片整合为一个芯片，这样可以进一步降低生产成本。
进一步地，在本公开的一些实施例提供的上述内嵌式触摸屏中，由于将多个第一电极板作为一组复用为一个压感检测电极，实现了压感触控功能；又将有机电致发光像素单元中的阴极层复用为自电容电极，实现了电容触控功能，因此，为了减少显示阶段、电容触控阶段和压感触控阶段的相互干扰，在具体实施时，需要采用显示阶段、电容触控阶段和压感触控阶段分时驱动的方式，其中，电容检测芯片在电容触控阶段对自电容电极施加电容检测信号，压感检测芯片在压感触控阶段对压感检测电极施加压感检测信号。当然，还可以将显示用的显示驱动芯片、电容检测芯片和压感检测芯片整合为一个芯片，这样可以进一步降低生产成本。
基于同一发明构思，本公开的一些实施例还提供了一种上述内嵌式触摸屏的驱动方法，一帧时间中至少包括：显示阶段和压感触控阶段；其中，
在压感触控阶段，压感检测芯片对压感检测电极施加压感检测信号，并通过检测压感检测电极与导电层之间的电容值的变化来判断触控位置的压力大小。
在本公开的一些实施例提供的上述驱动方法中，在压感触控阶段，压感检测芯片对压感检测电极施加压感检测信号，同时对导电层施加固定值电压信号。在此阶段中，当压感检测电极所在位置被按压时，会引起压感检测电极与导电层之间的距离发生变化，从而引起两者之间形成的电容结构的电容值的变化，使电容的充电时间发生变化，因此压感检测芯片可以通过检测压感检测电极的 电容的充电时间的变化来判断触控位置的压力大小，实现压感触控功能。
具体地，为了使压感检测信号的输入对内嵌式触摸屏的正常显示不造成影响，在压感触控阶段可以使有机电致发光像素单元处于不发光的状态。
进一步地，由于将有机电致发光像素单元中的阴极层复用为自电容电极，在具体实施时，在本公开的一些实施例提供的上述驱动方法中，一帧时间中还包括：电容触控阶段；其中，在电容触控阶段，电容检测芯片对自电容电极施加电容检测信号，并通过检测自电容电极的电容值的变化来确定触控位置。
具体地，在电容触控阶段，自电容电极对地电极(指衬底基板上除了自电容电极之外的其它电极和信号线)的电容越大，电容触控的精确度越小，因此为了保证电容触控的精确度，在电容触控阶段，电容检测芯片不仅对自电容电极施加电容检测信号，并且还可以对该自电容电极对应的地电极施加相同的电容检测信号，从而使自电容电极的base电容在理论上可以为0。
下面通过一帧时间的驱动时序图对本公开的一些实施例提供的驱动方法进行详细说明，图4中仅给出了一帧时间内压感检测电极上所施加的信号Sensor，导电层上所施加的信号Ve，自电容电极上所施加的信号Vss以及自电容电极所对应的地电极中的一条栅线上所施加的信号Gate和一条数据线上所施加的信号Data的时序图。需要说明的是，本实施例是为了更好的解释本公开，但不限制本公开。
如图4所示的驱动时序图中，一帧时间中包括：显示阶段t1、电容触控阶段t2和压感触控阶段t3；其中，
在显示阶段t1，压感检测电极上施加的信号Sensor、导电层上施加的信号Ve、阴极层上施加的信号Vss、栅线上施加的信号Gate、以及数据线上施加的信号Data均为内嵌式触摸屏在正常显示时所需的信号。
在电容触控阶段t2，自电容电极上施加的信号Vss、压感检测电极上施加的信号Sensor、导电层上施加的信号Ve、栅线上施加的信号Gate、以及数据线上施加的信号Data均为电容检测信号。
在压感触控阶段t3，压感检测电极上施加的信号Sensor为压感检测信号，导电层上施加的信号Ve、阴极层上施加的信号Vss、栅线上施加的信号Gate、以及数据线上施加的信号Data均为固定电压信号。
基于同一发明构思，本公开的一些实施例还提供了一种显示装置，包括本 公开的一些实施例提供的上述内嵌式触摸屏。该显示装置可以为：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。对于该显示装置的其它必不可少的组成部分均为本领域的普通技术人员应该理解具有的，在此不做赘述，也不应作为对本公开的限制。该显示装置的实施可以参见上述封装结构的实施例，重复之处不再赘述。
进一步地，在具体实施时，在本公开提供的上述显示装置中，导电层为内嵌式触摸屏的支撑背板。该支撑背板可以为包覆在内嵌式触摸屏外侧的金属框，也可以为贴敷于内嵌式触摸屏的衬底基板下方的金属贴片，在此不作赘述。当将该内嵌式触摸屏应用于手机时，支撑背板也可以为设置有导电材料的手机中框。
本公开的一些实施例提供的内嵌式触摸屏、其驱动方法及显示装置，包括：衬底基板、与衬底基板相对设置的对向基板、位于衬底基板上的呈矩阵排列的多个有机电致发光像素单元以及与有机电致发光像素单元对应的像素电路，其中各像素电路至少包括依次位于衬底基板上的第一电极板和第二电极板；通过将多个第一电极板复用为一个压感检测电极，并与设置在衬底基板下方的导电层形成电容结构；当压感检测电极所在位置被按压时，压感检测电极与导电层之间的距离产生变化随之带来两者之间电容的变化，因此，增加压感检测芯片，在压感触控阶段对压感检测电极施加压感检测信号，并通过检测压感检测电极与导电层之间的电容值的变化来判断触控位置的压力大小，可以实现压感触控功能。这样将相关技术中的有机电致发光有机电致发光显示面板中的多个第一电极板复用为一个压感检测电极，利用压感检测电极和位于衬底基板下方的导电层实现压感触控功能，对显示装置的结构设计改动较小，不会受到装配公差的限制，有利于实现更好的探测精度，且有利于节省制作成本。
显然，本领域的技术人员可以对本公开进行各种改动和变型而不脱离本公开的精神和范围。这样，倘若本公开的这些修改和变型属于本公开权利要求及其等同技术的范围之内，则本公开也意图包含这些改动和变型在内。

Claims (20)

  1. 一种内嵌式触摸屏，包括：衬底基板、与所述衬底基板相对设置的对向基板、位于所述衬底基板面向所述对向基板一侧的呈矩阵排列的多个有机电致发光像素单元、以及位于所述有机电致发光像素单元与所述衬底基板之间且与各所述有机电致发光像素单元对应的像素电路，其中各所述像素电路至少包括一个由依次位于所述衬底基板上的第一电极板和第二电极板组成的存储电容；其中，
    以相邻的多个所述第一电极板为一组复用为一个压感检测电极；所述内嵌式触摸屏包括多个所述压感检测电极；所述压感检测电极与位于所述衬底基板下方的导电层形成电容结构；
    所述内嵌式触摸屏还包括用于在压感触控阶段对所述压感检测电极施加压感检测信号，并通过检测所述压感检测电极与所述导电层之间的电容值的变化来判断触控位置的压力大小的压感检测芯片。
  2. 如权利要求1所述的内嵌式触摸屏，其中，沿所述衬底基板的中心区域指向边缘区域的方向，各所述压感检测电极所在区域在所述衬底基板上的所占面积逐渐变大。
  3. 如权利要求1所述的内嵌式触摸屏，还包括：与各所述压感检测电极一一对应的导线，以及与各所述压感检测电极一一对应的导通连接点；其中，
    各所述导通连接点位于所述内嵌式触摸屏围绕显示区域的周边区域内；
    各所述压感检测电极通过所述导线与所述导通连接点连接后，通过与所述导通连接点一一对应的且位于所述周边区域内的金属走线与所述压感检测芯片电性连接。
  4. 如权利要求3所述的内嵌式触摸屏，其中，所述周边区域具有四个侧边；
    各所述导通连接点均分布于所述周边区域的一个侧边处。
  5. 如权利要求3所述的内嵌式触摸屏，其中，所述周边区域具有四个侧 边；
    所述导通连接点在所述周边区域的各侧边均有分布，且与各所述压感检测电极对应的导通连接点分布在与所述压感检测电极距离最近的周边区域的侧边处。
  6. 如权利要求3所述的内嵌式触摸屏，还包括：位于所述衬底基板与所述对向基板之间的黑矩阵层；
    各所述导线在所述衬底基板的正投影位于所述黑矩阵层在所述衬底基板的正投影所在的区域内。
  7. 如权利要求3所述的内嵌式触摸屏，其中，各所述导线与各所述压感检测电极同层设置。
  8. 如权利要求1-7任一项所述的内嵌式触摸屏，其中，所述有机电致发光像素单元包括依次位于所述衬底基板上的阳极层、发光层与阴极层；
    所述阴极层被分割为多个相互独立的自电容电极；
    所述内嵌式触摸屏还包括用于在电容触控阶段对所述自电容电极施加电容检测信号，并通过检测所述自电容电极的电容值的变化来确定触控位置的电容检测芯片。
  9. 一种显示装置，包括内嵌式触摸屏，其中，所述内嵌式触摸屏包括：衬底基板、与所述衬底基板相对设置的对向基板、位于所述衬底基板面向所述对向基板一侧的呈矩阵排列的多个有机电致发光像素单元、以及位于所述有机电致发光像素单元与所述衬底基板之间且与各所述有机电致发光像素单元对应的像素电路，其中各所述像素电路至少包括一个由依次位于所述衬底基板上的第一电极板和第二电极板组成的存储电容；其中，
    以相邻的多个所述第一电极板为一组复用为一个压感检测电极；所述内嵌式触摸屏包括多个所述压感检测电极；所述压感检测电极与位于所述衬底基板下方的导电层形成电容结构；
    所述内嵌式触摸屏还包括用于在压感触控阶段对所述压感检测电极施加 压感检测信号，并通过检测所述压感检测电极与所述导电层之间的电容值的变化来判断触控位置的压力大小的压感检测芯片。
  10. 如权利要求9所述的显示装置，其中，所述有机电致发光像素单元包括依次位于所述衬底基板上的阳极层、发光层与阴极层；
    所述阴极层被分割为多个相互独立的自电容电极；
    所述内嵌式触摸屏还包括用于在电容触控阶段对所述自电容电极施加电容检测信号，并通过检测所述自电容电极的电容值的变化来确定触控位置的电容检测芯片。
  11. 如权利要求9所述的显示装置，其中，沿所述衬底基板的中心区域指向边缘区域的方向，各所述压感检测电极所在区域在所述衬底基板上的所占面积逐渐变大。
  12. 如权利要求9所述的显示装置，还包括：与各所述压感检测电极一一对应的导线，以及与各所述压感检测电极一一对应的导通连接点；其中，
    各所述导通连接点位于所述内嵌式触摸屏围绕显示区域的周边区域内；
    各所述压感检测电极通过所述导线与所述导通连接点连接后，通过与所述导通连接点一一对应的且位于所述周边区域内的金属走线与所述压感检测芯片电性连接。
  13. 如权利要求12所述的显示装置，其中，所述周边区域具有四个侧边；
    各所述导通连接点均分布于所述周边区域的一个侧边处。
  14. 如权利要求12所述的显示装置，其中，所述周边区域具有四个侧边；
    所述导通连接点在所述周边区域的各侧边均有分布，且与各所述压感检测电极对应的导通连接点分布在与所述压感检测电极距离最近的周边区域的侧边处。
  15. 如权利要求12所述的显示装置，还包括：位于所述衬底基板与所述 对向基板之间的黑矩阵层；
    各所述导线在所述衬底基板的正投影位于所述黑矩阵层在所述衬底基板的正投影所在的区域内。
  16. 如权利要求9所述的显示装置，其中，所述导电层为所述内嵌式触摸屏的支撑背板。
  17. 一种如权利要求1-8任一项所述的内嵌式触摸屏的驱动方法，其中，一帧时间中至少包括：显示阶段和压感触控阶段；其中，
    在所述压感触控阶段，所述压感检测芯片对所述压感检测电极施加压感检测信号，并通过检测所述压感检测电极与所述导电层之间的电容值的变化来判断触控位置的压力大小。
  18. 如权利要求17所述的驱动方法，其中，一帧时间中还包括：电容触控阶段；其中，
    在所述电容触控阶段，所述电容检测芯片对所述自电容电极施加电容检测信号，并通过检测所述自电容电极的电容值的变化来确定触控位置。
  19. 如权利要求17所述的驱动方法，其中，在所述压感触控阶段，所述有机电致发光像素单元处于不发光状态。
  20. 如权利要求18所述的驱动方法，还包括：对所述自电容电极对应的地电极施加所述电容检测信号。
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