WO2015003465A1 - 一种触摸显示驱动电路、驱动方法及显示装置 - Google Patents

一种触摸显示驱动电路、驱动方法及显示装置 Download PDF

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Publication number
WO2015003465A1
WO2015003465A1 PCT/CN2013/089555 CN2013089555W WO2015003465A1 WO 2015003465 A1 WO2015003465 A1 WO 2015003465A1 CN 2013089555 W CN2013089555 W CN 2013089555W WO 2015003465 A1 WO2015003465 A1 WO 2015003465A1
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WIPO (PCT)
Prior art keywords
unit
switch tube
node
driving
touch
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Application number
PCT/CN2013/089555
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English (en)
French (fr)
Inventor
周全国
祁小敬
Original Assignee
京东方科技集团股份有限公司
成都京东方光电科技有限公司
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Application filed by 京东方科技集团股份有限公司, 成都京东方光电科技有限公司 filed Critical 京东方科技集团股份有限公司
Priority to US14/361,897 priority Critical patent/US9448676B2/en
Publication of WO2015003465A1 publication Critical patent/WO2015003465A1/zh

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Classifications

    • 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
    • G06F3/04166—Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G—PHYSICS
    • 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
    • G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
    • G06F3/04184—Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally
    • 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
    • G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
    • 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]
    • 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
    • G09G3/3233—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 with pixel circuitry controlling the current through the light-emitting element
    • 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
    • G09G2300/0842—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor
    • G09G2300/0861—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor with additional control of the display period without amending the charge stored in a pixel memory, e.g. by means of additional select electrodes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2354/00—Aspects of interface with display user

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a touch display driving circuit, a driving method, and a display device. Background technique
  • Touch screens are gaining more and more attention in the consumer electronics market.
  • the touch screen as a human-computer interaction interface has been widely used in portable electronic devices, such as mobile phone screens, notebook computers, digital cameras and the like.
  • Touch screens can be divided into two categories according to technology: external (intern) touch screen and built-in (in-cel l) touch screen.
  • the external touch screen is provided with a touch device outside the display surface of the display panel.
  • the external touch screen has been widely used in mobile applications such as mobile phones.
  • the external touch screen has a high cost and a large thickness.
  • consumer electronic products such as mobile phones and tablet computers require smaller size, thinner thickness and lighter weight, and the built-in type touch screen can solve the above two disadvantages because it is integrated in the display panel.
  • AMOLED Active Matrix Organic Light Emitting Diode
  • the pixel display device of the AMOLED is an Organic Light-Emitting Diode (hereinafter referred to as 0LED).
  • 0LED Organic Light-Emitting Diode
  • the AMOLED can emit light by driving a thin film transistor to generate a driving current in a saturated state, and the driving current drives the 0 LED to emit light.
  • AMOLED driver circuits typically use a conventional 2T1C circuit that includes two thin film transistors and one storage capacitor.
  • the inventors have found that at least the following problems exist in the prior art:
  • the conventional 2T1C circuit can only perform OLED driving display, and has no built-in touch function, and cannot integrate the built-in type touch detection and the OLED driving display, and the display screen is added. thickness. Summary of the invention
  • the invention provides a touch display driving circuit, a driving method and a display device, which can realize integration of touch detection and pixel display, and reduce the thickness of the display screen.
  • the present invention provides a touch display driving circuit including: a data writing control unit, a storage unit, a touch sensing unit, a driving compensation control unit, a driving unit, an illumination control unit, and a light emitting unit. a unit; wherein the data write control unit is configured to control a voltage signal of the data line to be written into the storage unit;
  • the storage unit is configured to supply a voltage to the driving unit
  • the illumination control unit is configured to control the illumination of the illumination unit
  • the driving unit is configured to provide a touch detection current during a touch detection phase, and provide a driving current of the light emitting unit during a light emitting phase;
  • the driving compensation control unit is configured to compensate a voltage value of the storage unit
  • the touch sensing unit is configured to output the touch detection current during a touch detection phase, and change a voltage value of the storage unit when no touch occurs in the touch detection phase.
  • the data writing control unit is connected to the storage unit by using a second node; the storage unit is connected to the driving unit by using a first node; and the driving unit is controlled by the fourth node and the lighting a unit connection; the illumination control unit is connected to the illumination unit through the fifth node; the drive compensation control unit is respectively connected to the two ends of the storage unit by the first node and the second node; The control unit is connected to the driving unit through the first node and the fourth node respectively; the touch sensing unit passes through the third node, the first node, the fourth node, and the Drive unit connection.
  • the data writing control unit includes a sixth switch tube, the gate of the sixth switch tube is connected to the scan line, and the first pole of the sixth switch tube is connected to the data line, the sixth A second pole of the switch tube is coupled to the second node.
  • the storage unit includes a storage capacitor, a first end of the storage capacitor is connected to the second node, and a second end of the storage capacitor is connected to the first node.
  • the driving unit includes a driving transistor, and a gate of the driving transistor The pole is connected to the first node, the first pole of the driving transistor is connected to the third node, and the second pole of the driving transistor is connected to the fourth node.
  • the illumination control unit includes a first switch tube, a gate of the first switch tube is connected to a third control line, and a first pole of the first switch tube is connected to the fourth node.
  • the second pole of the first switch tube is connected to the fifth node.
  • the light emitting unit comprises an organic light emitting diode, one end of the organic light emitting diode is connected to the fifth node, and the other end of the organic light emitting diode is connected to the second power source.
  • the driving compensation control unit includes a fourth switching tube and a seventh switching tube; a gate of the fourth switching tube is connected to a second control line, and a first pole of the fourth switching tube is a first node is connected; a second pole of the fourth switch is connected to the fourth node; a gate of the seventh switch is connected to the second control line, and the first switch is first The pole is connected to the second node, and the second pole of the seventh switch is connected to the second power source.
  • the touch sensing unit includes: a photodiode, a third switch tube, and a fifth switch tube;
  • the first pole of the photodiode is connected to the first power source and the third node, and the second pole of the photodiode is connected to the first pole of the fifth switch tube;
  • a gate of the fifth switch tube is connected to the first control line, and a second pole of the fifth switch tube is connected to the first node;
  • a gate of the third switch tube is connected to the first control line, a first pole of the third switch tube is connected to the fourth node, and a second pole of the third switch tube and a read line connection.
  • the present invention provides a display device comprising the above touch display driving circuit.
  • the present invention provides a touch display driving method based on a touch display driving circuit, the touch display driving circuit including: a data writing control unit, a storage unit, a touch sensing unit, and a driving compensation a control unit, a driving unit, an illumination control unit, and a lighting unit;
  • the touch display driving method includes: a touch detection phase: the drive compensation control unit initializes the storage unit; the data write control unit writes a voltage signal of the data line to the storage unit; and the illumination control unit disconnects the illumination unit and the a connection of the driving unit, the touch sensing unit changes a voltage of the storage unit when no touch occurs, and the driving unit provides a touch detection current according to a voltage value of the storage unit, the touch sensing The unit outputs the touch detection current;
  • the driving compensation control unit initializing the storage unit; the data writing control unit writing a voltage signal of the data line to the storage unit; the lighting control unit causing the lighting unit and the driving unit Connected, the driving unit provides a driving current of the light emitting unit according to a voltage value of the storage unit.
  • the data writing control unit includes a sixth switching tube, a first pole of the sixth switching tube is connected to the data line, and a second pole of the sixth switching tube is connected to the second node;
  • the storage unit includes a storage capacitor, a first end of the storage capacitor is connected to the second node, and a second end of the storage capacitor is connected to the first node;
  • the driving unit includes a driving transistor, a gate of the driving transistor is connected to the first node, a first pole of the driving transistor is connected to a third node, and a second pole of the driving transistor is connected to a fourth node ;
  • the light-emitting control unit includes a first switch tube, a first pole of the first switch tube is connected to the fourth node, and a second pole of the first switch tube is connected to a fifth node; An organic light emitting diode, one end of the organic light emitting diode is connected to the fifth node, and the other end of the organic light emitting diode is connected to a second power source;
  • the driving compensation control unit includes a fourth switching tube and a seventh switching tube; a first pole of the fourth switching tube is connected to the first node, and a second pole of the fourth switching tube is opposite to the fourth a node is connected; a first pole of the seventh switch tube is connected to the second node, and a second pole of the seventh switch tube is connected to a second power source;
  • the touch sensing unit includes a photodiode, a third switching transistor, and a fifth switching transistor; the first pole of the photodiode is connected to the first power source and the third node, and the second pole of the photodiode is a first pole of the fifth switch tube; the fifth switch tube a second pole is connected to the first node; a first pole of the third switch tube is connected to the fourth node, and a second pole of the third switch tube is connected to the read line;
  • the touch detection phase specifically includes:
  • a touch sensing initialization phase the fourth switch tube and the seventh switch tube are turned on, the second power source charges the first end of the storage capacitor through the seventh switch tube, the driving transistor is turned on, and the first power source passes The driving transistor and the fourth switching transistor charge the second end of the storage capacitor until the driving transistor is turned off;
  • a touch sensing data writing phase the sixth switching transistor is turned on, and a voltage signal of the data line is written to the second end of the storage capacitor through the first end of the storage capacitor and the storage capacitor;
  • a touch detection phase the first switch tube is turned off, the third switch tube and the fifth switch tube are turned on, and leakage current of the photodiode is reduced by the fifth switch tube when the touch is not applied
  • the voltage of the second end of the driving transistor is detected by the read line by the third switching tube;
  • the lighting stage specifically includes:
  • Driving display initialization phase the fourth switch tube and the seventh switch tube are turned on, the second power source charges the first end of the storage capacitor through the seventh switch tube, and the driving transistor is turned on, the first power source Charging the second end of the storage capacitor through the driving transistor and the fourth switching transistor until the driving transistor is turned off;
  • the sixth switch is turned on, and the voltage signal of the data line is written into the second end of the storage capacitor through the first end of the storage capacitor and the storage capacitor;
  • a pixel display stage the first switch tube is turned on, the third switch tube and the fifth switch tube are turned off, and a current of the drive transistor drives the organic light emitting diode to emit light through the first switch tube.
  • the gate of the sixth switch tube is connected to the scan line; the gate of the first switch tube is connected to the third control line;
  • the gate of the fourth switch tube and the gate of the seventh switch tube are both connected to the second control line;
  • a gate of the fifth switch tube and a gate of the third switch tube are the same as the first a control line connection
  • the first switch tube, the third switch tube, the fourth switch tube, the fifth switch tube, the sixth switch tube, the seventh switch tube, and the driving transistor are all P-type thin film transistors
  • the first power source is at a high level, and the second power source is at a low level;
  • the touch detection phase specifically includes:
  • the scan line, the data line, the first control line, and the third control line provide a high level, and the second control line provides a low level;
  • the first control line, the second control line, and the third control line provide a high level, and the scan line and the data line provide a low level;
  • the scan line, the data line, the second control line, and the third control line provide a high level, and the first control line provides a low level;
  • the illuminating phase specifically includes:
  • Driving display initialization phase the scan line, the data line, the first control line, and the third control line provide a high level, and the second control line provides a low level;
  • Driving display data writing phase the first control line, the second control line, and the third control line provide a high level, and the scan line and the data line provide a low level;
  • Pixel display phase The scan line, the data line, the first control line, and the second control line provide a high level, and the third control line provides a low level.
  • the present invention provides a touch display driving circuit, a driving method, and a display device.
  • the touch display driving circuit includes: a data writing control unit, a storage unit, a touch sensing unit, a driving compensation control unit, a driving unit, and an illumination control unit.
  • the data write control unit is configured to control a voltage signal of the data line to be written into the memory unit;
  • the memory unit is configured to supply a voltage to the driving unit;
  • the light emission control unit is configured to control the
  • the driving unit is configured to provide a touch detection current during a touch detection phase, and provide a driving current of the light emitting unit in a light emitting phase;
  • the driving compensation control unit is configured to use a voltage value of the storage unit
  • the touch sensing unit is configured to output the touch detection current during the touch detection phase, and change the voltage value of the storage unit when no touch occurs in the touch detection phase.
  • FIG. 1 is a schematic structural diagram of a touch display driving circuit according to an embodiment of the present invention.
  • FIG. 2 is a schematic diagram of an input voltage of a touch display driving circuit according to an embodiment of the present invention
  • FIG. 3 is an equivalent circuit diagram of a touch sensing initialization phase of a touch display driving circuit according to an embodiment of the present invention
  • FIG. 4 is an equivalent circuit diagram of a touch sensing circuit writing phase of a touch display driving circuit according to an embodiment of the present invention
  • FIG. 5 is an equivalent circuit diagram of a touch detection driving phase of a touch display driving circuit according to an embodiment of the present invention.
  • FIG. 6 is an equivalent circuit diagram of a display display initialization phase of a touch display driving circuit according to an embodiment of the present invention.
  • FIG. 7 is an equivalent circuit diagram of a touch display driving circuit driving display data writing stage in an embodiment of the present invention.
  • FIG. 8 is an equivalent circuit diagram showing a pixel display phase of a touch display driving circuit according to an embodiment of the present invention. detailed description
  • FIG. 1 is a schematic structural diagram of a touch display driving circuit according to an embodiment of the present invention.
  • the touch display driving circuit includes: a data writing control unit, a storage unit, a touch sensing unit, and a driving compensation control.
  • the data write control unit is configured to control a voltage signal of the data line to be written into the storage unit;
  • the storage unit is configured to supply a voltage to the driving unit;
  • the illumination control unit is configured to control the illumination unit
  • the driving unit is configured to provide a touch detection current during the touch detection phase, and provide a driving current of the light emitting unit in the light emitting phase;
  • the driving compensation control unit is configured to compensate the voltage value of the storage unit;
  • the touch sensing unit is used for Outputting a touch detection current during the touch detection phase, and changing the storage unit when no touch occurs in the touch detection phase Voltage value.
  • the data writing control unit is connected to the storage unit through the second node B; the storage unit is connected to the driving unit through the first node A; the driving unit is connected to the lighting control unit through the fourth node of the node; and the fifth node is passed through the lighting control unit E is connected to the illuminating unit; the driving compensation control unit is connected to the two ends of the storage unit through the first node VIII and the second node B respectively; the driving compensation control unit passes through the first node VIII, the fourth node D and the driving unit respectively.
  • the touch sensing unit is connected to the driving unit through the third node C, the first node eight, and the fourth node D, respectively.
  • the data write control unit includes a sixth switch tube T6; the storage unit includes a storage capacitor Cst; the drive unit includes a drive transistor T2; the light emission control unit includes a first switch tube T1; and the light emitting unit includes an organic light emitting diode
  • the driving compensation control unit includes a fourth switching tube T4 and a seventh switching tube T7.
  • the touch sensing unit includes: a photodiode, a third switching tube T3, and a fifth switching tube T5.
  • the photodiode is a PD (photodiode).
  • the gate of the sixth switch T6 is connected to the scan line, the first pole of the sixth switch T6 is connected to the data line, and the second pole of the sixth switch T6 is connected to the second node; One end is connected to the second node B, and the second end of the storage capacitor Cst is connected to the first node A; the gate of the driving transistor T2 is connected to the first node A, and the first pole of the driving transistor T2 is connected to the third node C, The second pole of the driving transistor T2 is connected to the fourth node D; the gate of the first switching transistor T1 is connected to the third control line, the first pole of the first switching transistor T1 is connected to the fourth node D, and the first switching transistor T1 The second pole is connected to the fifth node E; one end of the organic light emitting diode D1 is connected to the fifth node E, the other end of the organic light emitting diode D1 is connected to the second power source VSS; and the gate and the seventh switch of the fourth switch tube T4 The gate of
  • the second pole of the seventh switching transistor T7 is connected to the second power source VSS.
  • the first pole of the photodiode PD is connected to the first power source VDD and the third node C, and the second pole of the photodiode PD is The first pole of the fifth switch tube T5 is connected, the gate of the fifth switch tube T5 is connected to the first control line, the second pole of the fifth switch tube ⁇ 5 is connected to the first node ;; the gate of the third switch tube T3 is The first control line is connected, the first pole of the third switch T3 is connected to the fourth node D, and the second pole of the third switch T3 is connected to the read line.
  • the voltage provided by the first power source is VDD
  • the voltage provided by the second power source is the reference voltage VSS.
  • the voltage VDD of the first power source is a high level
  • the reference voltage is The voltage VSS of the two power sources is a low level
  • the first pole of the driving transistor T2 is connected to the first power source VDD
  • the cathode of the photodiode PD is connected to the first power source VDD
  • the cathode of the organic light emitting diode D1 is connected to the second power source VSS.
  • the first switching transistor T1, the third switching transistor ⁇ 3, the fourth switching transistor ⁇ 4, the fifth switching transistor ⁇ 5, the sixth switching transistor ⁇ 6, the seventh switching transistor ⁇ 7, and the driving transistor ⁇ 2 are ⁇ -type thin film transistors.
  • the ⁇ -type thin film transistor means that when the gate is at a low level, the first pole and the second pole of the thin film transistor are turned on (ie, the thin film transistor is turned on); and when the gate is at a high level, the thin film transistor is turned on The insulation between the one pole and the second pole (ie, the thin film transistor is turned off).
  • FIG. 2 is a schematic diagram of the input voltage of the touch display driving circuit in the embodiment, which can be divided into two major stages: a touch detection phase and an illumination phase, and each phase is further divided into three small phases, wherein: For the touch sensing initialization phase, b is the touch sensing data writing phase, c is the touch detection phase, d is the driving display initialization phase, e is the driving display data writing phase, and f is the pixel display phase.
  • FIG. 3 is an equivalent circuit diagram of a touch sensing initialization phase of the touch display driving circuit in the embodiment. As shown in FIG. 2 and FIG.
  • the voltage supplied by the data line and the scan line is at a high level
  • the voltage supplied by the first control line is a high level
  • the voltage supplied by the second control line is Low level
  • the voltage provided by the third control line is high level
  • the first switch tube T1, the third switch tube ⁇ 3, the fifth switch tube ⁇ 5 and the sixth switch tube ⁇ 6 are closed, and the fourth switch tube ⁇ 4 and The seventh switch tube 7 is turned on. Therefore, the equivalent circuit diagram of the touch display driving circuit in FIG. 1 is as shown in FIG. 3.
  • the voltage supplied from the second power source VSS charges the second node through the seventh switch tube ,7.
  • FIG. 4 is an equivalent circuit diagram of the touch sensing circuit writing phase of the touch display driving circuit in the embodiment, and as shown in FIG. 2 and FIG. 4, during the data writing phase b of the touch sensing phase, the data line and the scanning
  • the voltage supplied by the line is low level
  • the voltage provided by the first control line is high level
  • the voltage provided by the second control line is high level
  • the voltage provided by the third control line is high level
  • the first The switch tube T1, the third switch tube ⁇ 3, the fourth switch tube ⁇ 4, the fifth switch tube ⁇ 5 and the seventh switch tube ⁇ 7 are closed, and the sixth switch tube ⁇ 6 is turned on. Therefore, the equivalent circuit of the touch display drive circuit in FIG. As shown in FIG.
  • the voltages supplied from the data lines and the scan lines are written into the first node A via the sixth switch ⁇ 6 and the storage capacitor Cst.
  • the first node A is suspended, no charge transfer, and the first node A voltage
  • FIG. 5 is a schematic diagram of an equivalent circuit of the touch detection driving circuit in the touch detection phase of the present embodiment.
  • the voltages provided by the data lines and the scan lines are at a high level.
  • the voltage provided by the first control line is a low level
  • the voltage provided by the second control line is a high level
  • the voltage provided by the third control line is a high level.
  • the first switching tube T1 and the fourth switching tube ⁇ 4, the sixth switch tube ⁇ 6 and the seventh switch tube ⁇ 7 are closed, the third switch tube ⁇ 3 and the fifth switch tube ⁇ 5 are turned on, therefore, the equivalent circuit diagram of the touch display drive circuit in FIG. 1 is as shown in FIG.
  • the voltage of a node ⁇ remains unchanged, which is V ⁇ V ⁇ VDD - V ⁇ .
  • the touch detection current is output from the first power supply VDD through the driving transistor T2 and the third switching transistor ⁇ 3 by the read line, and its size is affected by
  • the voltage on the gate of the driving transistor ⁇ 2 ie, the storage capacitor Cst voltage
  • the storage capacitor Cst voltage is controlled; wherein, if no touch occurs, external light can be irradiated onto the photodiode PD, and the photodiode PD generates a large leakage current when irradiated with light.
  • storage capacitor Cst The charge is rapidly reduced due to the leakage of the photodiode PD due to illumination, causing the voltage of the first node A to drop drastically, and the voltage drop of the first node A further causes the current flowing through the driving transistor T2 (touch detection current) to rapidly decrease; If there is a touch, the external light is blocked by the touch (for example, a finger), and cannot be irradiated onto the photodiode PD.
  • the photodiode PD has no current (or has a very small dark current, but can be regarded as no current). The charge on the storage capacitor Cst does not change.
  • the voltage of the first node A also does not change, and the current flowing through the driving transistor T2 (touch detection current) remains stable; therefore, the touch detection current flowing through the reading line is detected and analyzed by an external driving circuit (analysis of whether or not Significantly reduced), you can determine whether a touch has occurred.
  • FIG. 6 is a schematic diagram of an equivalent circuit of the display display initialization phase of the touch display driving circuit in the embodiment, as shown in FIG. 2 and FIG. 6, in the driving display initialization phase d, the voltage supplied by the data line and the scan line is a high level, The voltage provided by one control line is a high level, the voltage provided by the second control line is a low level, and the voltage provided by the third control line is a high level.
  • the first switching tube T1 and the third switching tube ⁇ 3 The fifth switch tube ⁇ 5 and the sixth switch tube ⁇ 6 are closed, and the fourth switch tube ⁇ 4 and the seventh switch tube ⁇ 7 are turned on.
  • the drive transistor ⁇ 2 is a diode
  • the equivalent circuit diagram of the touch display drive circuit in FIG. 6 shows that the voltage supplied from the second power source VSS charges the second node ⁇ through the seventh switch ⁇ 7, the first node ⁇ generates a coupling voltage, so that the driving transistor T2 is turned on, the first power source VDD passes the driving transistor T2 and the fourth The switch tube T4 charges the first node A.
  • FIG. 7 is a schematic diagram showing an equivalent circuit of a display data writing phase of the touch display driving circuit in the present embodiment.
  • the driving display data writing phase e the voltages supplied by the data lines and the scanning lines are Low level, the voltage provided by the first control line is high level, the voltage provided by the second control line is high level, and the voltage provided by the third control line is high level, at this time, the first switching tube Tl, the third The switch tube ⁇ 3, the fourth switch tube ⁇ 4, the fifth switch tube ⁇ 5 and the seventh switch tube ⁇ 7 are closed, and the sixth switch tube ⁇ 6 is turned on.
  • the equivalent circuit diagram of the touch display drive circuit in FIG. 1 is as shown in FIG.
  • FIG. 8 is a schematic diagram showing an equivalent circuit of a pixel display phase of the touch display driving circuit in the embodiment.
  • the voltage supplied by the data line and the scan line is a high level
  • the voltage supplied by the first control line is High level
  • the voltage provided by the second control line is high level
  • the voltage provided by the third control line is low level.
  • the third switching tube T3, the fourth switching tube ⁇ 4, the fifth switching tube ⁇ 5, the first Six switch tubes ⁇ 6 and seventh switch tubes ⁇ 7 are closed, first The switching transistor T1 is turned on.
  • the equivalent circuit diagram of the touch display driving circuit in FIG. 1 is as shown in FIG. 8.
  • the gate voltage of the driving transistor T2 is equal to the voltage of the first node A, that is, Vo ⁇ V ⁇ V ⁇ + VDD-V. ⁇
  • the current flowing through the driving transistor T2 at this time is:
  • the driving current flowing through the driving transistor T2 is independent of the threshold voltage of the driving transistor T2, and the driving through the organic light-emitting diode D1 is avoided.
  • the current is affected by the threshold voltage non-uniformity and drift.
  • the driving current flowing through the driving transistor T2 is also independent of the self-opening voltage ⁇ of the organic light emitting diode D1, thereby avoiding the self-opening voltage caused by the degradation of the driving current by the organic light emitting diode D1.
  • the influence of the increase in ⁇ increases the uniformity of the drive current flowing through the organic light emitting diode D1.
  • the driving transistor ⁇ 2 supplies a driving current of the organic light emitting diode D1
  • the driving transistor ⁇ 2 supplies a driving current of the organic light emitting diode D1 according to a voltage value of the storage capacitor Cst.
  • each of the switching transistors is a P-type thin film transistor as an example, but if the two power sources are changed.
  • the voltage, and changing the type of each or all of the thin film transistors for example, using an N-type thin film transistor, the person skilled in the art can also change the specific circuit structure and driving voltage according to the spirit of the embodiment, thereby realizing the present invention.
  • the touch display driving circuit includes: a data writing control unit, a storage unit, a touch sensing unit, a driving compensation control unit, a driving unit, an illumination control unit, and a lighting unit; wherein, the data The write control unit is configured to control the voltage signal of the data line to be written into the storage unit; the storage unit is configured to supply a voltage to the driving unit; the illumination control unit is configured to control the illumination of the illumination unit; and the driving unit is configured to provide the touch detection during the touch detection phase Current, and providing driving current of the light emitting unit in the light emitting phase; the driving compensation control unit is configured to compensate the voltage value of the storage unit; the touch sensing unit is configured to output the touch detection current in the touch detection phase, and is in the touch The voltage value of the memory cell is changed when no touch occurs in the detection phase, which can realize integration of touch detection and pixel display, and reduce the thickness of the display screen.
  • the structures of the first pole and the second pole are the same.
  • the first pole can serve as a source, and accordingly, the second pole acts as a drain; or, the first pole can serve as a drain, and correspondingly Ground, the second pole acts as the source.
  • the embodiment of the present invention further provides a display device, which includes a touch display driving circuit, and the touch display driving circuit adopts the touch display driving circuit in the above embodiment.
  • a display device which includes a touch display driving circuit
  • the touch display driving circuit adopts the touch display driving circuit in the above embodiment.
  • the display device provided by the embodiment of the present invention includes a touch display driving circuit, and the touch display driving circuit includes: a data writing control unit, a storage unit, a touch sensing unit, a driving compensation control unit, a driving unit, an illumination control unit, and a light emitting unit.
  • the data write control unit is configured to control the voltage signal of the data line to be written into the storage unit;
  • the storage unit is configured to supply a voltage to the driving unit;
  • the illumination control unit is configured to control the illumination of the illumination unit; and
  • the driving unit is used in the touch detection phase Providing a touch detection current, and providing a driving current of the light emitting unit in the light emitting phase;
  • the driving compensation control unit is configured to compensate the voltage value of the storage unit;
  • the touch sensing unit is configured to output the touch detection current in the touch detection phase, And changing the voltage value of the storage unit when no touch occurs in the touch detection phase, which can realize integration of touch detection and pixel display, and reduce the thickness of the display screen.
  • the embodiment of the present invention further provides a touch display driving method, which is based on the touch display driving circuit in the above embodiment, the touch display driving circuit includes: a data writing control unit, a storage unit, and a touch sensing unit. , drive compensation control unit, drive unit, illumination control unit and illumination unit.
  • the touch display driving method includes:
  • Step S101 The touch detection phase: the drive compensation control unit initializes the storage unit; the data write control unit writes the voltage signal of the data line to the storage unit; the illumination control unit disconnects the connection between the illumination unit and the drive unit, and touches
  • the sensing unit changes the voltage of the storage unit when no touch occurs, the driving unit provides a touch detection current according to the voltage value of the storage unit, and the touch sensing unit outputs the touch detection current;
  • Step S102 lighting stage: driving compensation control unit initializing the storage unit; Writing, according to the writing control unit, the voltage signal of the data line to the storage unit; the lighting control unit connects the light emitting unit to the driving unit, and the driving unit provides the driving current of the light emitting unit according to the voltage value of the storage unit, and whether or not there is a touch at this time
  • the touch sensing unit does not change the voltage of the memory unit, and does not allow the touch detection current output.
  • the data write control unit includes a sixth switch tube, the first pole of the sixth switch tube is connected to the data line, and the second pole of the sixth switch tube is connected to the second node;
  • the storage unit includes a storage capacitor and a storage capacitor The first end is connected to the second node, the second end of the storage capacitor is connected to the first node;
  • the driving unit comprises a driving transistor, the gate of the driving transistor is connected to the first node, and the first pole of the driving transistor is connected with the third node The second pole of the driving transistor is connected to the fourth node;
  • the light emitting control unit comprises a first switching transistor, the first pole of the first switching transistor is connected to the fourth node, and the second pole of the first switching transistor is connected to the fifth node;
  • the light emitting unit includes an organic light emitting diode, one end of the organic light emitting diode is connected to the fifth node, and the other end of the organic light emitting diode is connected to the second power source;
  • the driving compensation control unit includes
  • the touch detection phase specifically includes:
  • the touch sensing initialization phase the fourth switch tube and the seventh switch tube are turned on, the second power source charges the first end of the storage capacitor through the seventh switch tube, the driving transistor is turned on, and the first power source passes the driving transistor and the fourth switch The tube charges the second end of the storage capacitor until the drive transistor is turned off;
  • the touch sensing data is written in the stage: the sixth switch is turned on, and the voltage signal of the data line is written to the second end of the storage capacitor through the first end of the storage capacitor and the storage capacitor;
  • Touch detection phase the first switch tube is closed, the third switch tube and the fifth switch tube are turned on, and the leakage current of the photodiode is reduced by the fifth switch tube when the voltage is not touched, and the voltage of the second end of the storage capacitor is reduced, and the current of the driving transistor is driven. Reading detection by the read line through the third switch tube;
  • the lighting stage specifically includes:
  • Driving display initialization phase the fourth switch tube and the seventh switch tube are turned on, the second power source charges the first end of the storage capacitor through the seventh switch tube, the drive transistor is turned on, and the first power source passes the drive transistor and the fourth switch tube Charging the second end of the storage capacitor until the drive transistor is turned off;
  • Driving display data writing phase the sixth switch tube is turned on, the voltage signal of the data line is written to the second end of the storage capacitor through the first end of the storage capacitor and the storage capacitor;
  • Pixel display phase the first switch tube is turned on, the third switch tube and the fifth switch tube are turned off, and the current of the drive transistor drives the organic light emitting diode to emit light through the first switch tube.
  • the gate of the sixth switch tube is connected to the scan line; the gate of the first switch tube is connected to the third control line; the gate of the fourth switch tube and the gate of the seventh switch tube are both second and second a control line connection; a gate of the fifth switch tube and a gate of the third switch tube are all connected to the first control line; the first switch tube, the third switch tube, the fourth switch tube, the fifth switch tube, and the sixth switch.
  • the tube, the seventh switch tube, and the driving transistor are all P-type thin film transistors; the first power source is at a high level, and the second power source is at a low level;
  • the touch detection phase specifically includes:
  • the touch sensing initialization phase the scan line, the data line, the first control line, and the third control line provide a high level, and the second control line provides a low level;
  • the touch sensing data writing phase the first control line, the second control line, and the third control line provide a high level, and the scan line and the data line provide a low level;
  • the touch detection phase the scan line, the data line, the second control line, and the third control line provide a high level, and the first control line provides a low level;
  • the lighting stage specifically includes:
  • Driving display initialization phase the scan line, the data line, the first control line, the third control line provide a high level, and the second control line provides a low level;
  • Driving display data writing phase the first control line, the second control line, and the third control line provide a high level, and the scan line and the data line provide a low level;
  • Pixel display phase The scan line, the data line, the first control line, and the second control line provide a high level, and the third control line provides a low level.
  • the touch display driving method in the embodiment of the present invention may be based on the touch in the above embodiment
  • the touch display driving method is based on the touch display driving circuit, and the touch display driving circuit includes: a data writing control unit, a storage unit, a touch sensing unit, a driving compensation control unit, and a driving a unit, an illumination control unit, and a lighting unit, wherein the data writing control unit is configured to control a voltage signal of the data line to be written into the storage unit; the storage unit is configured to supply a voltage to the driving unit; The driving unit is configured to provide a touch detection current during a touch detection phase, and provide a driving current of the light emitting unit in an illumination stage; the drive compensation control unit is configured to The voltage value of the storage unit is compensated; the touch sensing unit is configured to output the touch detection current during the touch detection phase, and change the voltage value of the storage unit when no touch occurs in the touch detection phase. It can realize touch detection and pixel display integration, reducing the thickness of the display screen.

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Abstract

一种触摸显示驱动电路、驱动方法及显示装置，该触摸显示驱动电路包括：数据写入控制单元（T6）、存储单元（Cst）、触控感测单元（T5，PD，T3）、驱动补偿控制单元（Τ7，Τ4）、驱动单元（Τ2）、发光控制单元（T1）和发光单元（D1）；其中，所述数据写入控制单元（Τ6）用于控制数据线的电压信号写入所述存储单元（Cst）；所述存储单元（Cst）用于为驱动单元（T2）提供电压；所述发光控制单元（T1）用于控制所述发光单元（D1）发光；所述驱动单元（T2）用于在触控检测阶段（a，b，c）提供触控检测电流，并在发光阶段（d，e，f）提供所述发光单元（D1）的驱动电流；所述驱动补偿控制单元（T7，Τ4）用于对所述存储单元（Cst）的电压值进行补偿；所述触控感测单元（T5，PD，T3）用于在触控检测阶段输出所述触控检测电流，并在触控检测阶段（a，b，c）中无触摸发生时改变所述存储单元（Cst）的电压值。该触摸显示驱动电路、驱动方法及显示装置可以实现触摸检测和像素显示一体化，降低显示屏幕的厚度。

Description

一种触摸显示驱动电路、 驱动方法及显示装置
技术领域
本发明涉及显示技术领域， 具体涉及一种触摸显示驱动电路、 驱动方法及显示装置。 背景技术
触摸屏在消费电子产品市场上获得越来越多的关注。 目前触摸 屏作为人机交互的界面已经广泛应用于便携式电子器件中， 如手机 屏， 笔记本电脑， 数码相机等。触摸屏按照技术可以分为两类： 外置 型（external)触摸屏和内置型（in-cel l)触摸屏。 外置型触摸屏是在 显示面板的显示面之外设置一个触摸装置，外置型触摸屏已经广泛用 于手机等移动应用产品中， 然而， 外置型触摸屏成本较高， 并且厚度 较大。当需要将触摸屏做得越来越大的时候，外置型触摸屏的上述两 个缺点就越发显现出来。 当前， 消费类电子产品如手机、平板电脑等 都要求体积更小， 厚度更薄， 重量更轻， 而内置型触摸屏由于整合在 显示面板中， 因此可以很好地解决上述两个缺点。
有源矩阵有机发光二极管面板 （Active Matrix Organic Light Emitting Diode，简称： AMOLED) 的应用越来越重要。 AMOLED的像素 显示器件为有机发光二极管 （Organic Light-Emitting Diode，以下 简称 0LED) ， AMOLED能够发光是通过驱动薄膜晶体管在饱和状态下 产生驱动电流， 该驱动电流驱动 0LED发光。 目前， AMOLED驱动电路 通常采用传统的 2T1C 电路， 该 2T1C 电路包括两个薄膜晶体管和 1 个存储电容。
发明人发现现有技术中至少存在以下问题： 传统的 2T1C电路， 只能进行 0LED驱动显示， 没有内置型触摸的功能， 无法实现内置型 触摸检测和 0LED驱动显示的一体化， 增加了显示屏幕的厚度。 发明内容
本发明提供一种触摸显示驱动电路、 驱动方法及显示装置， 可 以实现触摸检测和像素显示一体化， 降低显示屏幕的厚度。
为实现上述目的， 本发明提供一种触摸显示驱动电路， 该触摸 显示驱动电路包括： 数据写入控制单元、 存储单元、 触控感测单元、 驱动补偿控制单元、 驱动单元、 发光控制单元和发光单元； 其中， 所述数据写入控制单元用于控制数据线的电压信号写入所述存 储单元；
所述存储单元用于为驱动单元提供电压；
所述发光控制单元用于控制所述发光单元发光；
所述驱动单元用于在触控检测阶段提供触控检测电流， 并在发 光阶段提供所述发光单元的驱动电流；
所述驱动补偿控制单元用于对所述存储单元的电压值进行补 偿；
所述触控感测单元用于在触控检测阶段输出所述触控检测电 流， 并在触控检测阶段中无触摸发生时改变所述存储单元的电压值。
可选地， 所述数据写入控制单元通过第二节点与所述存储单元 连接；所述存储单元通过第一节点与所述驱动单元连接；所述驱动单 元通过第四节点与所述发光控制单元连接；所述发光控制单元通过第 五节点与发光单元连接；所述驱动补偿控制单元分别通过所述第一节 点、所述第二节点与所述存储单元的两端连接；所述驱动补偿控制单 元与分别通过所述第一节点、所述第四节点与所述驱动单元连接；所 述触控感测单元分别通过第三节点、所述第一节点、所述第四节点与 所述驱动单元连接。
可选地， 所述数据写入控制单元包括第六开关管， 所述第六开 关管的栅极与扫描线连接， 所述第六开关管的第一极与数据线连接， 所述第六开关管的第二极与所述第二节点连接。
可选地， 所述存储单元包括存储电容， 所述存储电容的第一端 与所述第二节点连接， 所述存储电容的第二端与所述第一节点连接。
可选地， 所述驱动单元包括驱动晶体管， 所述驱动晶体管的栅 极与所述第一节点连接，所述驱动晶体管的第一极与所述第三节点连 接， 所述驱动晶体管的第二极与所述第四节点连接。
可选地， 所述发光控制单元包括第一开关管， 所述第一开关管 的栅极与第三控制线连接，所述第一开关管的第一极与所述第四节点 连接， 所述第一开关管的第二极与所述第五节点连接。
可选地， 所述发光单元包括有机发光二极管， 所述有机发光二 极管的一端与第五节点连接，所述有机发光二极管的另一端与第二电 源连接。
可选地， 所述驱动补偿控制单元包括第四开关管和第七开关管； 所述第四开关管的栅极与第二控制线连接，所述第四开关管的第一极 与所述第一节点连接； 所述第四开关管的第二极与所述第四节点连 接；所述第七开关管的栅极与所述第二控制线连接，所述第七开关管 的第一极与所述第二节点连接，所述第七开关管的第二极与第二电源 连接。
可选地， 所述触控感测单元包括： 光电二极管、 第三开关管和 第五开关管；
所述光电二极管的第一极与第一电源和所述第三节点连接， 所 述光电二极管的第二极与所述第五开关管的第一极连接；
所述第五开关管的栅极与第一控制线连接， 所述第五开关管的 第二极与所述第一节点连接；
所述第三开关管的栅极与所述第一控制线连接， 所述第三开关 管的第一极与所述第四节点连接，所述第三开关管的第二极与读取线 连接。
为实现上述目的， 本发明提供一种显示装置， 包括上述的触摸 显示驱动电路。
为实现上述目的， 本发明提供一种触摸显示驱动方法， 该触摸 显示驱动方法基于触摸显示驱动电路，该触摸显示驱动电路包括：数 据写入控制单元、 存储单元、 触控感测单元、 驱动补偿控制单元、 驱 动单元、 发光控制单元和发光单元；
该触摸显示驱动方法包括： 触控检测阶段： 所述驱动补偿控制单元初始化所述存储单元； 所述数据写入控制单元将数据线的电压信号写入所述存储单元；所述 发光控制单元断开所述发光单元与所述驱动单元的连接，所述触控感 测单元在无触摸发生时改变所述存储单元的电压，所述驱动单元根据 所述存储单元的电压值提供触控检测电流，所述触控感测单元输出所 述触控检测电流；
发光阶段： 所述驱动补偿控制单元初始化所述存储单元； 所述 数据写入控制单元将数据线的电压信号写入所述存储单元；所述发光 控制单元使所述发光单元与所述驱动单元连接，所述驱动单元根据所 述存储单元的电压值提供所述发光单元的驱动电流。
可选地， 所述数据写入控制单元包括第六开关管， 所述第六开 关管的第一极与数据线连接，所述第六开关管的第二极与第二节点连 接；
所述存储单元包括存储电容， 所述存储电容的第一端与所述第 二节点连接， 所述存储电容的第二端与第一节点连接；
所述驱动单元包括驱动晶体管， 所述驱动晶体管的栅极与所述 第一节点连接，所述驱动晶体管的第一极与第三节点连接，所述驱动 晶体管的第二极与第四节点连接；
所述发光控制单元包括第一开关管， 所述第一开关管的第一极 与所述第四节点连接， 所述第一开关管的第二极与第五节点连接； 所述发光单元包括有机发光二极管， 所述有机发光二极管的一 端与所述第五节点连接，所述有机发光二极管的另一端与第二电源连 接；
所述驱动补偿控制单元包括第四开关管和第七开关管； 所述第 四开关管的第一极与所述第一节点连接，所述第四开关管的第二极与 所述第四节点连接； 所述第七开关管的第一极与所述第二节点连接， 所述第七开关管的第二极与第二电源连接；
所述触控感测单元包括光电二极管、第三开关管和第五开关管； 所述光电二极管的第一极与第一电源和所述第三节点连接，所述光电 二极管的第二极与所述第五开关管的第一极连接；所述第五开关管的 第二极与所述第一节点连接；所述第三开关管的第一极与所述第四节 点连接， 所述第三开关管的第二极与读取线连接；
触控检测阶段具体包括：
触摸感测初始化阶段： 所述第四开关管和第七开关管导通， 第 二电源通过所述第七开关管对存储电容的第一端充电，所述驱动晶体 管导通，第一电源通过所述驱动晶体管和第四开关管对所述存储电容 的第二端充电， 直至所述驱动晶体管关闭；
触摸感测数据写入阶段： 所述第六开关管导通， 数据线的电压 信号通过所述存储电容的第一端和所述存储电容写入存储电容的第 二端；
触摸侦测阶段： 所述第一开关管关闭， 所述第三开关管和第五 开关管导通，无触摸时所述光电二极管的漏电流通过所述第五开关管 减小所述存储电容的第二端的电压，所述驱动晶体管的电流通过所述 第三开关管由读取线读出检测；
发光阶段具体包括：
驱动显示初始化阶段： 所述第四开关管和第七开关管导通， 第 二电源通过所述第七开关管对所述存储电容的第一端充电，所述驱动 晶体管导通，第一电源通过所述驱动晶体管和第四开关管对所述存储 电容的第二端充电， 直至所述驱动晶体管关闭；
驱动显示数据写入阶段： 所述第六开关管导通， 数据线的电压 信号通过所述存储电容的第一端和所述存储电容写入所述存储电容 的第二端；
像素显示阶段： 所述第一开关管导通， 所述第三开关管和第五 开关管关闭，所述驱动晶体管的电流通过所述第一开关管驱动所述有 机发光二极管发光。
进一步可选地， 所述第六开关管的栅极与扫描线连接； 所述第一开关管的栅极与第三控制线连接；
所述第四开关管的栅极以及所述第七开关管的栅极均与第二控 制线连接；
所述第五开关管的栅极以及所述第三开关管的栅极均与所述第 一控制线连接；
所述第一开关管、 第三开关管、 第四开关管、 第五开关管、 第 六开关管、 第七开关管、 驱动晶体管均为 P型薄膜晶体管；
所述第一电源为高电平， 所述第二电源为低电平；
所述触控检测阶段具体包括：
触摸感测初始化阶段： 所述扫描线、 数据线、 第一控制线、 第 三控制线提供高电平， 所述第二控制线提供低电平；
触摸感测数据写入阶段： 所述第一控制线、 第二控制线、 第三 控制线提供高电平， 所述扫描线、 数据线提供低电平；
触摸侦测阶段： 所述扫描线、 数据线、 第二控制线、 第三控制 线提供高电平， 所述第一控制线提供低电平；
所述发光阶段具体包括：
驱动显示初始化阶段： 所述扫描线、 数据线、 第一控制线、 第 三控制线提供高电平， 所述第二控制线提供低电平；
驱动显示数据写入阶段： 所述第一控制线、 第二控制线、 第三 控制线提供高电平， 所述扫描线、 数据线提供低电平；
像素显示阶段： 所述扫描线、 数据线、 第一控制线、 第二控制 线提供高电平， 所述第三控制线提供低电平。
本发明提供的一种触摸显示驱动电路、 驱动方法及显示装置， 该触摸显示驱动电路包括： 数据写入控制单元、存储单元、触控感测 单元、 驱动补偿控制单元、 驱动单元、 发光控制单元和发光单元； 其 中，所述数据写入控制单元用于控制数据线的电压信号写入所述存储 单元；所述存储单元用于为驱动单元提供电压；所述发光控制单元用 于控制所述发光单元发光；所述驱动单元用于在触控检测阶段提供触 控检测电流，并在发光阶段提供所述发光单元的驱动电流；所述驱动 补偿控制单元用于对所述存储单元的电压值进行补偿；所述触控感测 单元用于在触控检测阶段输出所述触控检测电流，并在触控检测阶段 中无触摸发生时改变所述存储单元的电压值。本发明的技术方案可以 实现触摸检测和像素显示一体化， 降低显示屏幕的厚度。 附图说明
图 1 为本发明实施例提供的一种触摸显示驱动电路的结构示意 图；
图 2为本发明实施例中触摸显示驱动电路的输入电压的示意图； 图 3 为本发明实施例中触摸显示驱动电路触摸感测初始化阶段 的等效电路图；
图 4为本发明实施例中触摸显示驱动电路触摸感测数据写入阶 段的等效电路图；
图 5 为本发明实施例中触摸显示驱动电路触摸侦测阶段的等效 电路图；
图 6为本发明实施例中触摸显示驱动电路驱动显示初始化阶段 的等效电路图；
图 7 为本发明实施例中触摸显示驱动电路驱动显示数据写入阶 段的等效电路图； 以及
图 8 为本发明实施例中触摸显示驱动电路像素显示阶段的等效 电路图。 具体实施方式
为使本领域技术人员更好地理解本发明的技术方案， 下面结合 附图对本发明提供的一种触摸显示驱动电路、驱动方法及显示装置作 进一步详细描述。
图 1 为本发明实施例提供的一种触摸显示驱动电路的结构示意 图， 如图 1所示， 该触摸显示驱动电路包括： 数据写入控制单元、 存 储单元、 触控感测单元、 驱动补偿控制单元、 驱动单元、 发光控制单 元和发光单元；其中，数据写入控制单元用于控制数据线的电压信号 写入存储单元；存储单元用于为驱动单元提供电压；发光控制单元用 于控制发光单元发光；驱动单元用于在触控检测阶段提供触控检测电 流，并在发光阶段提供发光单元的驱动电流；驱动补偿控制单元用于 对存储单元的电压值进行补偿；触控感测单元用于在触控检测阶段输 出触控检测电流，并在触控检测阶段中无触摸发生时改变存储单元的 电压值。
优选地， 数据写入控制单元通过第二节点 B与存储单元连接； 存储单元通过第一节点 A与驱动单元连接；驱动单元通过节点第四节 点与发光控制单元连接；发光控制单元通过第五节点 E与发光单元连 接； 驱动补偿控制单元分别通过第一节点八、 所述第二节点 B与存储 单元的两端连接； 驱动补偿控制单与分别通过第一节点八、 第四节点 D与驱动单元连接； 触控感测单元分别通过第三节点 C、 第一节点八、 第四节点 D与驱动单元连接。
本实施例中， 优选地， 数据写入控制单元包括第六开关管 T6; 存储单元包括存储电容 Cst ;驱动单元包括驱动晶体管 T2;发光控制 单元包括第一开关管 T1 ; 发光单元包括有机发光二极管 D1 ; 驱动补 偿控制单元包括第四开关管 T4和第七开关管 T7;触控感测单元包括： 光电二极管、 第三开关管 T3和第五开关管 T5。 本实施例中， 光电二 极管为 PD ( photoelectric diode, 简称 PD) 。
具体地， 第六开关管 T6 的栅极与扫描线连接， 第六开关管 T6 的第一极与数据线连接， 第六开关管 T6的第二极与第二节点连接； 存储电容 Cst的第一端与第二节点 B连接，存储电容 Cst的第二端与 第一节点 A连接； 驱动晶体管 T2的栅极与第一节点 A连接， 驱动晶 体管 T2的第一极与第三节点 C连接，驱动晶体管 T2的第二极与第四 节点 D连接； 第一开关管 T1的栅极与第三控制线连接， 第一开关管 T1的第一极与第四节点 D连接，第一开关管 T1的第二极与第五节点 E连接； 有机发光二极管 D1的一端与第五节点 E连接， 有机发光二 极管 D1的另一端与第二电源 VSS连接；第四开关管 T4的栅极与第七 开关管 T7的栅极连接， 且连接第二控制线连接 （即相当于第四开关 管 T4的栅极和第七开关管 T7的栅极均连接第二控制线），第四开关 管 T4的第一极与第一节点 A连接；第四开关管 T4的第二极与所第四 节点 D连接； 第七开关管 T7的栅极与第二控制线连接 （还可连接第 四开关管 T4的栅极） ， 第七开关管 T7的第一极与第二节点 B连接， 第七开关管 T7的第二极与第二电源 VSS连接。光电二极管 PD的第一 极与第一电源 VDD和第三节点 C连接， 光电二极管 PD的第二极与第 五开关管 T5的第一极连接，第五开关管 T5的栅极与第一控制线连接， 第五开关管 Τ5的第二极与第一节点 Α连接；第三开关管 T3的栅极与 第一控制线连接， 第三开关管 T3的第一极与第四节点 D连接， 第三 开关管 T3的第二极与读取线连接。
本实施例中，第一电源提供的电压为 VDD，第二电源提供的电压 为参考电压 VSS , 其中， 优选地， 第一电源的电压 VDD为高电平， 则 相应地，作为参考电压的第二电源的电压 VSS为低电平，且驱动晶体 管 T2的第一极与第一电源 VDD连接，光电二极管 PD的负极与第一电 源 VDD连接， 有机发光二极管 D1的负极与第二电源 VSS连接， 第一 开关管 Tl、 第三开关管 Τ3、 第四开关管 Τ4、 第五开关管 Τ5、 第六开 关管 Τ6、 第七开关管 Τ7和驱动晶体管 Τ2为 Ρ型薄膜晶体管。
其中， Ρ型薄膜晶体管是指， 当其栅极为低电平时薄膜晶体管的 第一极和第二极之间导通（即薄膜晶体管导通）； 而当其栅极为高电 平时薄膜晶体管的第一极和第二极之间绝缘 （即薄膜晶体管关闭） 。
下面结合图 2至图 8所示， 对本实施例中触摸显示驱动电路的 工作过程进行详细描述。图 2为本实施例中触摸显示驱动电路的输入 电压的示意图，从时序上可以分成两个大阶段：触控检测阶段和发光 阶段， 且每个阶段又分为三个小阶段， 其中： a为触摸感测初始化阶 段， b为触摸感测数据写入阶段， c为触摸侦测阶段， d为驱动显示 初始化阶段， e为驱动显示数据写入阶段， f 为像素显示阶段。 图 3 为本实施例中触摸显示驱动电路触摸感测初始化阶段的等效电路图。 如图 2和图 3所示， 在触摸感测初始化阶段&， 数据线和扫描线提供 的电压为高电平，第一控制线提供的电压为高电平，第二控制线提供 的电压为低电平， 第三控制线提供的电压为高电平， 此时， 第一开关 管 Tl、 第三开关管 Τ3、 第五开关管 Τ5和第六开关管 Τ6关闭， 第四 开关管 Τ4和第七开关管 Τ7导通， 因此， 图 1中触摸显示驱动电路的 等效电路示意图如图 3所示，此时第二电源 VSS提供的电压通过第七 开关管 Τ7对第二节点 Β充电， 同时对存储电容 Cst充电， 第一节点 A产生耦合电压， 驱动晶体管 T2导通， 第一电源 VDD对第一节点 A 充电， 驱动晶体管 T2的栅极电压^ ^与第一节点 A电压 相等， 即 VGT = V = VDD-Vth , 其中， 为驱动晶体管 T2的阈值电压， 这时驱动 晶体管 Τ2关闭， 第一电源 VDD停止对第一节点 Α充电。
图 4为本实施例中触摸显示驱动电路触摸感测数据写入阶段的 等效电路示意图，如图 2和图 4所示，在触摸感测阶段的数据写入阶 段 b时，数据线和扫描线提供的电压为低电平，第一控制线提供的电 压为高电平，第二控制线提供的电压为高电平，第三控制线提供的电 压为高电平， 此时， 第一开关管 Tl、第三开关管 Τ3、第四开光管 Τ4、 第五开关管 Τ5和第七开关管 Τ7关闭， 第六开关管 Τ6导通， 因此， 图 1中触摸显示驱动电路的等效电路示意图如图 4所示，数据线和扫 描线提供的电压经第六开关管 Τ6和存储电容 Cst写入第一节点 A， 此时， 第一节点 A悬空， 无电荷转移， 第一节点 A电压增加量等于第 二节点 B 电压增加量， 即 Δ νΒ= ^^， 因此， 第一节点 Α 电压 V^ V^ + VDD - V^ 其中， ^^为数据线提供的电压。
图 5 为本实施例中触摸显示驱动电路触摸侦测阶段的等效电路 示意图， 如图 2和图 5所示， 在触摸侦测阶段 c时， 数据线和扫描线 提供的电压为高电平，第一控制线提供的电压为低电平，第二控制线 提供的电压为高电平， 第三控制线提供的电压为高电平， 此时， 第一 开关管 Tl、 第四开关管 Τ4、 第六开关管 Τ6和第七开关管 Τ7关闭， 第三开关管 Τ3和第五开关管 Τ5导通， 因此， 图 1中触摸显示驱动电 路的等效电路示意图如图 5 所示， 第一节点 Α 电压保持不变， 为 V^ V^ VDD - V^ , 此阶段中， 触控检测电流从第一电源 VDD经驱动 晶体管 T2、 第三开关管 Τ3 由读取线输出， 其大小受驱动晶体管 Τ2 栅极上电压（即存储电容 Cst电压）控制； 其中， 若未发生触摸， 则 外界的光可照射到光电二极管 PD上，光电二极管 PD在受到光的照射 时会产生较大漏电流， 存储电容 Cst上的电荷由于光电二极管 PD受 光照产生的漏电而迅速减少，导致第一节点 A电压大幅下降，第一节 点 A电压下降进一步导致流经驱动晶体管 T2的电流（触控检测电流） 迅速减小； 相应的， 若有触摸时， 则外界的光被触摸（例如手指）挡 住， 不能照射到光电二极管 PD上， 光电二极管 PD中无电流（或有极 小的暗电流， 但可近似视为无电流） ， 存储电容 Cst上的电荷不变， 第一节点 A的电压也不变， 流经驱动晶体管 T2的电流 （触控检测电 流）保持稳定； 因此， 通过外部驱动电路对流经读取线的触控检测电 流进行侦测解析（分析其是否明显减小），即可判断出是否发生触摸。
图 6为本实施例中触摸显示驱动电路驱动显示初始化阶段等效 电路示意图， 如图 2和图 6所示， 在驱动显示初始化阶段 d， 数据线 和扫描线提供的电压为高电平，第一控制线提供的电压为高电平，第 二控制线提供的电压为低电平，第三控制线提供的电压为高电平，此 时， 第一开关管 Tl、 第三开关管 Τ3、 第五开关管 Τ5和第六开关管 Τ6关闭， 第四开关管 Τ4和第七开关管 Τ7导通， 此时驱动晶体管 Τ2 为一个二极管， 图 1 中触摸显示驱动电路的等效电路示意图如图 6 所示， 第二电源 VSS提供的电压通过第七开关管 Τ7对第二节点 Β充 电， 第一节点 Α产生耦合电压， 使得驱动晶体管 T2导通， 第一电源 VDD通过驱动晶体管 T2和第四开关管 T4对第一节点 A进行充电，驱 动晶体管 T2 的栅极电压^ ^与第一节点 A 电压 相等， 即 CT2 = ^ = PDD- 时， 第一电源 VDD停止对第一节点 A充电。
图 7 为本实施例中触摸显示驱动电路驱动显示数据写入阶段的 等效电路示意图， 如图 2和图 7所示， 在驱动显示数据写入阶段 e， 数据线和扫描线提供的电压为低电平，第一控制线提供的电压为高电 平，第二控制线提供的电压为高电平，第三控制线提供的电压为高电 平， 此时第一开关管 Tl、 第三开关管 Τ3、 第四开关管 Τ4、 第五开关 管 Τ5和第七开关管 Τ7关闭， 第六开关管 Τ6导通， 图 1中触摸显示 驱动电路的等效电路示意图如图 7所示，数据线提供的电压通过第六 开关管 Τ6和存储电容 Cst写入第一节点 Α， 第一节点 Α悬空， 无电 荷转移， 第一节点 A 电压增加量等于第二节点 B 电压增加量， 即 d ， 因此， 第一节点 A电压 = ^to + ,- 。
图 8 为本实施例中触摸显示驱动电路像素显示阶段的等效电路 示意图， 如图 2和图 8所示， 数据线和扫描线提供的电压为高电平， 第一控制线提供的电压为高电平， 第二控制线提供的电压为高电平， 第三控制线提供的电压为低电平， 此时， 第三开关管 T3、 第四开关 管 Τ4、 第五开关管 Τ5、 第六开关管 Τ6和第七开关管 Τ7关闭， 第一 开关管 Tl导通， 图 1中触摸显示驱动电路的等效电路示意图如图 8 所示， 驱动晶体管 T2 的栅极电压与第一节点 A 电压相等， 即 Vo^ V^ V^ + VDD- V^ , 此时流过驱动晶体管 T2的电流为：
I
Figure imgf000014_0001
为驱动晶体管连接 T2的栅源电压， 为驱动晶体管 T2的阈值电压， 由上述公式可知， 流过驱动晶体管 T2 的驱动电流与驱动晶体管 T2 的阈值电压 无关， 避免了流过有机发光二极管 D1的驱动电流受到 阈值电压 不均匀和漂移的影响， 同时， 流过驱动晶体管 T2的驱动 电流也与有机发光二极管 D1的自身开启电压 — σω无关，避免了驱动 电流受到有机发光二极管 D1退化导致的自身开启电压 σω升高的影 响， 从而提高了流过有机发光二极管 D1的驱动电流的均匀性。 驱动 晶体管 Τ2提供有机发光二极管 D1的驱动电流， 驱动晶体管 Τ2根据 存储电容 Cst的电压值提供有机发光二极管 D1的驱动电流。
当然， 应当理解， 虽然以上的说明是以第一电源的电压 VDD为 高电平，第二电源的电压 VSS为低电平，各开关管均为 P型薄膜晶体 管作为例子，但如果改变两电源的电压，并改变各部分或全部薄膜晶 体管的类型（例如使用 N型薄膜晶体管）， 则本领域技术人员也可按 照本实施例的精神改变具体的电路结构和驱动电压， 从而实现本发 明。
本实施例提供的触摸显示驱动电路， 该触摸显示驱动电路包括： 数据写入控制单元、 存储单元、 触控感测单元、 驱动补偿控制单元、 驱动单元、发光控制单元和发光单元； 其中， 数据写入控制单元用于 控制数据线的电压信号写入存储单元；存储单元用于为驱动单元提供 电压；发光控制单元用于控制发光单元发光；驱动单元用于在触控检 测阶段提供触控检测电流， 并在发光阶段提供发光单元的驱动电流； 驱动补偿控制单元用于对存储单元的电压值进行补偿；触控感测单元 用于在触控检测阶段输出触控检测电流，并在触控检测阶段中无触摸 发生时改变存储单元的电压值，其可以实现触摸检测和像素显示一体 化， 降低显示屏幕的厚度。
需要说明的是， 本发明实施例中， 在第一开关管 Tl、 第三开关 管 T3、 第四开关管 Τ4、 第五开关管 Τ5、 第六开关管 Τ6、 第七开关管 Τ7和驱动晶体管 Τ2各个晶体管中， 第一极和第二极作为源漏极。 在 所述晶体管中， 第一极和第二极的结构是相同的。实际应用时， 对于 一个晶体管，根据该晶体管在电路中的位置和作用，第一极可作为源 极， 则相应地， 第二极作为漏极； 或者， 第一极可作为漏极， 则相应 地， 第二极作为源极。
本发明实施例还提供一种显示装置， 该显示装置包括触摸显示 驱动电路，该触摸显示驱动电路采用上述实施例中的触摸显示驱动电 路，其具体实施方式请参见上述实施例， 此处不再具体描述。
本发明实施例提供的显示装置包括触摸显示驱动电路， 该触摸 显示驱动电路包括： 数据写入控制单元、 存储单元、 触控感测单元、 驱动补偿控制单元、 驱动单元、 发光控制单元和发光单元； 其中， 数 据写入控制单元用于控制数据线的电压信号写入存储单元；存储单元 用于为驱动单元提供电压；发光控制单元用于控制发光单元发光；驱 动单元用于在触控检测阶段提供触控检测电流，并在发光阶段提供发 光单元的驱动电流；驱动补偿控制单元用于对存储单元的电压值进行 补偿；触控感测单元用于在触控检测阶段输出触控检测电流，并在触 控检测阶段中无触摸发生时改变存储单元的电压值，其可以实现触摸 检测和像素显示一体化， 降低显示屏幕的厚度。
本发明实施例还提供一种触摸显示驱动方法， 该触摸显示驱动 方法基于上述实施例中的触摸显示驱动电路，该触摸显示驱动电路包 括： 数据写入控制单元、存储单元、 触控感测单元、 驱动补偿控制单 元、 驱动单元、 发光控制单元和发光单元。
本实施例中， 该触摸显示驱动方法包括：
步骤 S 101、触控检测阶段：驱动补偿控制单元初始化存储单元; 数据写入控制单元将数据线的电压信号写入存储单元；发光控制单元 断开发光单元与所述驱动单元的连接，触控感测单元在无触摸发生时 改变存储单元的电压，驱动单元根据存储单元的电压值提供触控检测 电流， 触控感测单元输出触控检测电流；
步骤 S 102、 发光阶段： 驱动补偿控制单元初始化存储单元； 数 据写入控制单元将数据线的电压信号写入存储单元；所述发光控制单 元使发光单元与驱动单元连接，驱动单元根据存储单元的电压值提供 发光单元的驱动电流，此时无论是否有触摸，触控感测单元均不改变 存储单元的电压， 且也不允许触控检测电流输出。
具体地， 若数据写入控制单元包括第六开关管， 第六开关管的 第一极与数据线连接，第六开关管的第二极与第二节点连接；存储单 元包括存储电容，存储电容的第一端与第二节点连接，存储电容的第 二端与第一节点连接；驱动单元包括驱动晶体管，驱动晶体管的栅极 与第一节点连接，驱动晶体管的第一极与第三节点连接，驱动晶体管 的第二极与第四节点连接；发光控制单元包括第一开关管，第一开关 管的第一极与第四节点连接， 第一开关管的第二极与第五节点连接； 发光单元包括有机发光二极管，有机发光二极管的一端与第五节点连 接，有机发光二极管的另一端与第二电源连接；驱动补偿控制单元包 括第四开关管和第七开关管； 第四开关管的第一极与第一节点连接， 第四开关管的第二极与第四节点连接；第七开关管的第一极与第二节 点连接，第七开关管的第二极与第二电源连接；触控感测单元包括光 电二极管、第三开关管和第五开关管；光电二极管的第一极与第一电 源和第三节点连接， 光电二极管的第二极与第五开关管的第一极连 接；第五开关管的第二极与第一节点连接；第三开关管的第一极与第 四节点连接， 第三开关管的第二极与读取线连接； 则
触控检测阶段具体包括：
触摸感测初始化阶段： 第四开关管和第七开关管导通， 第二电 源通过第七开关管对存储电容的第一端充电，驱动晶体管导通，第一 电源通过驱动晶体管和第四开关管对存储电容的第二端充电，直至驱 动晶体管关闭；
触摸感测数据写入阶段： 第六开关管导通， 数据线的电压信号 通过存储电容的第一端和存储电容写入存储电容的第二端；
触摸侦测阶段： 第一开关管关闭， 第三开关管和第五开关管导 通，无触摸时光电二极管的漏电流通过第五开关管减小存储电容的第 二端的电压， 驱动晶体管的电流通过第三开关管由读取线读出检测； 而发光阶段具体包括：
驱动显示初始化阶段： 第四开关管和第七开关管导通， 第二电 源通过第七开关管对存储电容的第一端充电，驱动晶体管导通，第一 电源通过驱动晶体管和第四开关管对存储电容的第二端充电，直至驱 动晶体管关闭；
驱动显示数据写入阶段： 第六开关管导通， 数据线的电压信号 通过存储电容的第一端和存储电容写入存储电容的第二端；
像素显示阶段： 第一开关管导通， 第三开关管和第五开关管关 闭， 驱动晶体管的电流通过第一开关管驱动有机发光二极管发光。
更具体地， 若第六开关管的栅极与扫描线连接； 第一开关管的 栅极与第三控制线连接；第四开关管的栅极以及第七开关管的栅极均 与第二控制线连接；第五开关管的栅极以及第三开关管的栅极均与第 一控制线连接；第一开关管、第三开关管、第四开关管、第五开关管、 第六开关管、第七开关管、驱动晶体管均为 P型薄膜晶体管； 第一电 源为高电平， 第二电源为低电平； 则
触控检测阶段具体包括：
触摸感测初始化阶段： 扫描线、 数据线、 第一控制线、 第三控 制线提供高电平， 第二控制线提供低电平；
触摸感测数据写入阶段： 第一控制线、 第二控制线、 第三控制 线提供高电平， 扫描线、 数据线提供低电平；
触摸侦测阶段： 扫描线、 数据线、 第二控制线、 第三控制线提 供高电平， 第一控制线提供低电平；
发光阶段具体包括：
驱动显示初始化阶段： 扫描线、 数据线、 第一控制线、 第三控 制线提供高电平， 第二控制线提供低电平；
驱动显示数据写入阶段： 第一控制线、 第二控制线、 第三控制 线提供高电平， 扫描线、 数据线提供低电平；
像素显示阶段： 扫描线、 数据线、 第一控制线、 第二控制线提 供高电平， 第三控制线提供低电平。
本发明实施例中的触摸显示驱动方法可基于上述实施例中的触 摸显示驱动电路实现，其具体实施方式请参见上述实施例，此处不再 具体描述。
本发明实施例提供的触摸显示驱动方法， 该触摸显示驱动方法 基于触摸显示驱动电路，该触摸显示驱动电路包括：数据写入控制单 元、 存储单元、 触控感测单元、 驱动补偿控制单元、 驱动单元、 发光 控制单元和发光单元，其中，所述数据写入控制单元用于控制数据线 的电压信号写入所述存储单元；所述存储单元用于为驱动单元提供电 压；所述发光控制单元用于控制所述发光单元发光；所述驱动单元用 于在触控检测阶段提供触控检测电流，并在发光阶段提供所述发光单 元的驱动电流；所述驱动补偿控制单元用于对所述存储单元的电压值 进行补偿；所述触控感测单元用于在触控检测阶段输出所述触控检测 电流， 并在触控检测阶段中无触摸发生时改变所述存储单元的电压 值， 其可以实现触摸检测和像素显示一体化， 降低显示屏幕的厚度。
可以理解的是， 以上实施方式仅仅是为了说明本发明的原理而 采用的示例性实施方式，然而本发明并不局限于此。对于本领域内的 普通技术人员而言，在不脱离本发明的精神和实质的情况下，可以做 出各种变型和改进， 这些变型和改进也视为本发明的保护范围。

Claims

权利要求
1. 一种触摸显示驱动电路， 其中， 包括： 数据写入控制单元、 存储单元、 触控感测单元、 驱动补偿控制单元、 驱动单元、 发光控制 单元和发光单元； 其中，
所述数据写入控制单元用于控制数据线的电压信号写入所述存 储单元；
所述存储单元用于为所述驱动单元提供电压；
所述发光控制单元用于控制所述发光单元发光；
所述驱动单元用于在触控检测阶段提供触控检测电流， 并在发 光阶段提供所述发光单元的驱动电流；
所述驱动补偿控制单元用于对所述存储单元的电压值进行补 偿；
所述触控感测单元用于在触控检测阶段输出所述触控检测电 流， 并在触控检测阶段中无触摸发生时改变所述存储单元的电压值。
2. 根据权利要求 1所述的触摸显示驱动电路， 其中，
所述数据写入控制单元通过第二节点与所述存储单元连接； 所 述存储单元通过第一节点与所述驱动单元连接；所述驱动单元通过第 四节点与所述发光控制单元连接；所述发光控制单元通过第五节点与 发光单元连接；所述驱动补偿控制单元分别通过所述第一节点、所述 第二节点与所述存储单元的两端连接；所述驱动补偿控制单元分别通 过所述第一节点、所述第四节点与所述驱动单元连接；所述触控感测 单元分别通过所述第三节点、所述第一节点、所述第四节点与所述驱 动单元连接。
3. 根据权利要求 2所述的触摸显示驱动电路， 其中， 所述数据 写入控制单元包括第六开关管， 所述第六开关管的栅极与扫描线连 接，所述第六开关管的第一极与数据线连接，所述第六开关管的第二 极与所述第二节点连接。
4. 根据权利要求 2所述的触摸显示驱动电路， 其中，
所述存储单元包括存储电容， 所述存储电容的第一端与所述第 二节点连接， 所述存储电容的第二端与所述第一节点连接。
5. 根据权利要求 2所述的触摸显示驱动电路， 其中，
所述驱动单元包括驱动晶体管， 所述驱动晶体管的栅极与所述 第一节点连接，所述驱动晶体管的第一极与所述第三节点连接，所述 驱动晶体管的第二极与所述第四节点连接。
6. 根据权利要求 2所述的触摸显示驱动电路， 其中，
所述发光控制单元包括第一开关管， 所述第一开关管的栅极与 第三控制线连接，所述第一开关管的第一极与所述第四节点连接，所 述第一开关管的第二极与所述第五节点连接。
7. 根据权利要求 2所述的触摸显示驱动电路， 其中，
所述发光单元包括有机发光二极管， 所述有机发光二极管的一 端与所述第五节点连接，所述有机发光二极管的另一端与第二电源连 接。
8. 根据权利要求 2所述的触摸显示驱动电路， 其中，
所述驱动补偿控制单元包括第四开关管和第七开关管； 所述第 四开关管的栅极与所述第二控制线连接，所述第四开关管的第一极与 所述第一节点连接， 所述第四开关管的第二极与所述第四节点连接； 所述第七开关管的栅极与所述第二控制线连接，所述第七开关管的第 一极与所述第二节点连接， 所述第七开关管的第二极与第二电源连 接。
9. 根据权利要求 2所述的触摸显示驱动电路， 其中，
所述触控感测单元包括： 光电二极管、 第三开关管和第五开关 管；
所述光电二极管的第一极与第一电源和所述第三节点连接， 所 述光电二极管的第二极与所述第五开关管的第一极连接；
所述第五开关管的栅极与第一控制线连接， 所述第五开关管的 第二极与所述第一节点连接；
所述第三开关管的栅极与所述第一控制线连接， 所述第三开关 管的第一极与所述第四节点连接，所述第三开关管的第二极与读取线 连接。
10. 一种显示装置， 其中， 包括权利要求 1-9任一项所述的触 摸显示驱动电路。
11. 一种触摸显示驱动方法， 其中， 所述触摸显示驱动方法基 于触摸显示驱动电路，该触摸显示驱动电路包括：数据写入控制单元、 存储单元、 触控感测单元、 驱动补偿控制单元、 驱动单元、 发光控制 单元和发光单元；
该触摸显示驱动方法包括：
触控检测阶段： 所述驱动补偿控制单元初始化所述存储单元； 所述数据写入控制单元将数据线的电压信号写入所述存储单元；所述 发光控制单元断开所述发光单元与所述驱动单元的连接，所述触控感 测单元在无触摸发生时改变所述存储单元的电压，所述驱动单元根据 所述存储单元的电压值提供触控检测电流，所述触控感测单元输出所 述触控检测电流；
发光阶段： 所述驱动补偿控制单元初始化所述存储单元； 所述 数据写入控制单元将数据线的电压信号写入所述存储单元；所述发光 控制单元使所述发光单元与所述驱动单元连接，所述驱动单元根据所 述存储单元的电压值提供所述发光单元的驱动电流。
12. 根据权利要求 11所述的触摸显示驱动方法， 其中， 所述数据写入控制单元包括第六开关管， 所述第六开关管的第 一极与数据线连接， 所述第六开关管的第二极与第二节点连接； 所述存储单元包括存储电容， 所述存储电容的第一端与所述第 二节点连接， 所述存储电容的第二端与第一节点连接；
所述驱动单元包括驱动晶体管， 所述驱动晶体管的栅极与所述 第一节点连接，所述驱动晶体管的第一极与第三节点连接，所述驱动 晶体管的第二极与第四节点连接；
所述发光控制单元包括第一开关管， 所述第一开关管的第一极 与所述第四节点连接， 所述第一开关管的第二极与第五节点连接； 所述发光单元包括有机发光二极管， 所述有机发光二极管的一 端与所述第五节点连接，所述有机发光二极管的另一端与第二电源连 接；
所述驱动补偿控制单元包括第四开关管和第七开关管； 所述第 四开关管的第一极与所述第一节点连接，所述第四开关管的第二极与 所述第四节点连接； 所述第七开关管的第一极与所述第二节点连接， 所述第七开关管的第二极与第二电源连接；
所述触控感测单元包括光电二极管、第三开关管和第五开关管； 所述光电二极管的第一极与第一电源和所述第三节点连接，所述光电 二极管的第二极与所述第五开关管的第一极连接；所述第五开关管的 第二极与所述第一节点连接；所述第三开关管的第一极与所述第四节 点连接， 所述第三开关管的第二极与读取线连接；
触控检测阶段具体包括：
触摸感测初始化阶段： 所述第四开关管和第七开关管导通， 第 二电源通过所述第七开关管对存储电容的第一端充电，所述驱动晶体 管导通，第一电源通过所述驱动晶体管和第四开关管对所述存储电容 的第二端充电， 直至所述驱动晶体管关闭；
触摸感测数据写入阶段： 所述第六开关管导通， 数据线的电压 信号通过所述存储电容的第一端和所述存储电容写入存储电容的第 二端；
触摸侦测阶段： 所述第一开关管关闭， 所述第三开关管和第五 开关管导通，无触摸时所述光电二极管的漏电流通过所述第五开关管 减小所述存储电容的第二端的电压，所述驱动晶体管的电流通过所述 第三开关管由读取线读出检测；
发光阶段具体包括：
驱动显示初始化阶段： 所述第四开关管和第七开关管导通， 第 二电源通过所述第七开关管对所述存储电容的第一端充电，所述驱动 晶体管导通，第一电源通过所述驱动晶体管和第四开关管对所述存储 电容的第二端充电， 直至所述驱动晶体管关闭；
驱动显示数据写入阶段： 所述第六开关管导通， 数据线的电压 信号通过所述存储电容的第一端和所述存储电容写入所述存储电容 的第二端；
像素显示阶段： 所述第一开关管导通， 所述第三开关管和第五 开关管关闭，所述驱动晶体管的电流通过所述第一开关管驱动所述有 机发光二极管发光。
13. 根据权利要求 12所述的触摸显示驱动方法， 其特征在于， 其中，
所述第六开关管的栅极与扫描线连接；
所述第一开关管的栅极与第三控制线连接；
所述第四开关管的栅极以及所述第七开关管的栅极均与第二控 制线连接；
所述第五开关管的栅极以及所述第三开关管的栅极均与所述第 一控制线连接；
所述第一开关管、 第三开关管、 第四开关管、 第五开关管、 第 六开关管、 第七开关管、 驱动晶体管均为 P型薄膜晶体管；
所述第一电源为高电平， 所述第二电源为低电平；
所述触控检测阶段具体包括：
触摸感测初始化阶段： 所述扫描线、 数据线、 第一控制线、 第 三控制线提供高电平， 所述第二控制线提供低电平；
触摸感测数据写入阶段： 所述第一控制线、 第二控制线、 第三 控制线提供高电平， 所述扫描线、 数据线提供低电平； 触摸侦测阶段： 所述扫描线、 数据线、 第二控制线、 第三控制 线提供高电平， 所述第一控制线提供低电平；
所述发光阶段具体包括：
驱动显示初始化阶段： 所述扫描线、 数据线、 第一控制线、 第 三控制线提供高电平， 所述第二控制线提供低电平；
驱动显示数据写入阶段： 所述第一控制线、 第二控制线、 第三 控制线提供高电平， 所述扫描线、 数据线提供低电平；
像素显示阶段： 所述扫描线、 数据线、 第一控制线、 第二控制 线提供高电平， 所述第三控制线提供低电平。
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