WO2015014077A1 - 有机发光二极管像素电路及其驱动方法、显示装置 - Google Patents

有机发光二极管像素电路及其驱动方法、显示装置 Download PDF

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Publication number
WO2015014077A1
WO2015014077A1 PCT/CN2013/089518 CN2013089518W WO2015014077A1 WO 2015014077 A1 WO2015014077 A1 WO 2015014077A1 CN 2013089518 W CN2013089518 W CN 2013089518W WO 2015014077 A1 WO2015014077 A1 WO 2015014077A1
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Prior art keywords
thin film
film transistor
emitting diode
organic light
control line
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Ceased
Application number
PCT/CN2013/089518
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English (en)
French (fr)
Inventor
周全国
祁小敬
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BOE Technology Group Co Ltd
Chengdu BOE Optoelectronics Technology Co Ltd
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BOE Technology Group Co Ltd
Chengdu BOE Optoelectronics Technology Co Ltd
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Priority to US14/369,393 priority Critical patent/US9285938B2/en
Publication of WO2015014077A1 publication Critical patent/WO2015014077A1/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
    • 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 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
    • G06F3/042—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]
    • 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]
    • 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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/18—Timing circuits for raster scan displays
    • 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
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0404—Matrix technologies
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G09G2300/0809—Several active elements per pixel in active matrix panels
    • G09G2300/0819—Several active elements per pixel in active matrix panels used for counteracting undesired variations, e.g. feedback or autozeroing
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • 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
    • 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
    • G09G2300/0852—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor being a dynamic memory with more than one capacitor
    • 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
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0243—Details of the generation of driving signals
    • G09G2310/0251—Precharge or discharge of pixel before applying new pixel voltage
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
    • G09G2360/141—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light conveying information used for selecting or modulating the light emitting or modulating element
    • G09G2360/142—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light conveying information used for selecting or modulating the light emitting or modulating element the light being detected by light detection means within each pixel

Definitions

  • Organic light emitting diode pixel circuit, driving method thereof, and display device
  • the invention belongs to the technical field of touch display, and particularly relates to an organic light emitting diode pixel circuit, a driving method thereof and a display device. Background technique
  • the touch screen panel is the simplest, most convenient and natural human-computer interaction device. It has been widely used in a variety of electronic products, such as mobile phones, notebook computers, digital cameras and so on.
  • 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 on the display panel.
  • the touch device generally includes a touch panel and a protective layer (such as a diamond glass).
  • the touch panel is disposed on the display panel, and the touch panel works by sensing the change of light or pressure by the touch panel.
  • the built-in touch screen technology embeds the function of the touch panel sensing signal into the pixel circuit, and by loading the control circuit, the display screen has the ability to sense the touch signal.
  • the inventors have found that at least the following problems exist in the prior art:
  • the function of sensing the signal of the touch panel is embedded in the pixel circuit, the control circuit is complicated, and the manufacturing process is complicated, which is not conducive to product yield and production efficiency. Improvement.
  • the aperture ratio of the pixels is lowered, which in turn causes the display quality of the display to deteriorate.
  • the technical problem to be solved by the present invention includes that the control circuit and the manufacturing process of the built-in type touch screen in the prior art are complicated, thereby being disadvantageous for improving the product yield and the production efficiency, and providing a control circuit and a manufacturing process are relatively simple.
  • the technical solution adopted to solve the technical problem of the present invention is an organic light emitting diode pixel circuit including a data writing unit, a driving unit, an organic light emitting diode, and a first control a unit, a second control unit, and a touch detection unit; wherein:
  • the first control unit is configured to introduce a power voltage signal into the data writing unit under the control of the scanning signal line during the touch detection phase and the organic light emitting diode lighting phase, and the organic light emitting diode and the driving unit in the organic light emitting diode lighting stage Conduction
  • the data writing unit is configured to introduce a power voltage signal under the control of the first lighting control line during the touch detection phase and the OLED lighting phase, and import the data line signal under the control of the scanning signal line and the second lighting control line. And also used to supply voltage to the driving unit;
  • the touch detection unit is configured to sense a touch under the control of a touch signal level control line during a touch detection phase, and generate a detection signal;
  • the driving unit is configured to convert the detection signal into a touch output signal under the control of a touch signal level control line during a touch detection phase, and output the touch output signal to the driving integrated circuit via the touch detection unit.
  • the driving unit is further configured to provide a driving current for the organic light emitting diode in an illuminating stage of the organic light emitting diode;
  • the second control unit is configured to conduct the driving unit to a ground level in an organic light emitting diode illumination phase under control of a third lighting control line.
  • the anode of the organic light emitting diode is connected to a power source.
  • the data writing unit includes: a first thin film transistor, a third thin film transistor, a fifth thin film transistor, a storage capacitor, and a first capacitor;
  • a gate of the first thin film transistor is connected to the first light emission control line, and a drain of the first thin film transistor is connected to a second end of the storage capacitor;
  • a gate of the third thin film transistor is connected to a scan signal line, a source of the third thin film transistor is connected to a data signal line, and a drain of the third thin film transistor is connected to a first end of the storage capacitor;
  • a gate of the fifth thin film transistor is connected to a second light emission control line, a source of the fifth thin film transistor is connected to a drain of the third thin film transistor, a drain of the fifth thin film transistor is Drive unit connection;
  • the first end of the first capacitor is connected to the first end of the storage capacitor, and the second end of the first capacitor is grounded.
  • the first control unit includes a second thin film transistor, the second The gate of the thin film transistor is connected to the scanning signal line, the source is connected to the cathode of the organic light emitting diode, and the drain is connected to the source of the first thin film transistor in the data writing unit.
  • the driving unit includes a fourth thin film transistor, and a gate of the fourth thin film transistor is connected to a second end of the storage capacitor and a drain of the first thin film transistor of the data writing unit.
  • the source of the fourth thin film transistor is connected to the drain of the second thin film transistor.
  • the second control unit includes a sixth thin film transistor, the drain of the sixth thin film transistor is grounded, the gate of the sixth thin film transistor is connected to the third light emitting control line, and the source of the sixth thin film transistor is The drain of the fifth thin film transistor in the data writing unit is connected.
  • the touch detection unit comprises a photodiode, a seventh thin film transistor, an eighth thin film transistor, and a ninth thin film transistor, wherein:
  • a cathode of the photodiode is connected to a gate of the fourth thin film transistor, and is connected to a second end of the storage capacitor in the data writing unit, an anode of the photodiode and the seventh film
  • the source of the transistor is connected;
  • a drain of the seventh thin film transistor is grounded, and a gate of the seventh thin film transistor is connected to a touch signal level control line;
  • a source of the eighth thin film transistor is connected to a drain of the fourth thin film transistor, a drain of the eighth thin film transistor is connected to a sensor line, and a gate of the eighth thin film transistor is controlled with a touch signal level Line connection
  • a source of the ninth thin film transistor is connected to a power signal line, and a drain of the ninth thin film transistor is connected to a source of the first thin film transistor in the data writing unit, the ninth thin film transistor The gate is connected to the touch signal level control line.
  • the first thin film transistor and the second thin film transistor are P-type thin film transistors
  • the thin film transistor and the ninth thin film transistor are N-type thin film transistors
  • first thin film transistor, the second thin film transistor, and the fourth thin film transistor are N-type thin film transistors
  • the body tube, the seventh thin film transistor, the eighth thin film transistor, and the ninth thin film transistor are P-type thin film transistors.
  • the first to ninth thin film transistors are any one of a polysilicon thin film transistor, a single crystal silicon thin film transistor, an oxide thin film transistor, and an organic thin film transistor.
  • the organic light emitting diode is an upper light emitting type organic light emitting diode.
  • the OLED pixel circuit of the present invention comprises a photodiode, which enables the display screen to have the ability to directly sense the signal generated by the touch, thereby making the control circuit of the pixel simpler, simplifying the process steps, thereby improving production efficiency and products. Yield, the most important is to help reduce production costs.
  • the OLED pixel circuit of the present invention can compensate for the non-uniformity of the threshold voltage of the thin film transistor, thereby improving the picture uniformity of the organic light emitting display.
  • the production process reduces the two layers of indium tin oxide film to effectively improve the light transmittance, thereby improving the display quality of the display.
  • the present invention also provides a display device comprising the above-described organic light emitting diode pixel circuit.
  • the display device of the present invention includes the above-described organic light emitting diode pixel circuit, the overall thickness of the display device is thinner, the weight is lighter, and the production cost is further reduced.
  • the sensitivity of the display sensing touch can be significantly improved by providing the above-described circuit in each sub-pixel, and since the photodiode operates by sensing light changes, a floating touch can be realized on the display screen.
  • the technical solution adopted to solve the technical problem of the present invention is a driving method of the above OLED pixel circuit, which comprises a touch signal detecting phase and a driving organic light emitting diode illuminating phase, wherein:
  • the touch signal detection phase includes:
  • the scan signal line controls the second thin film transistor to be turned on and the third thin film transistor to be turned off
  • the first light emission control line controls the first thin film transistor to be turned on
  • the second light emission control line controls the fifth thin film transistor
  • the third light-emitting control line controls the sixth thin film transistor to be turned off
  • the touch signal level control line controls the touch signal detecting module to be turned off
  • the power signal is transmitted to the second end of the storage capacitor
  • Scanning signal line controls switching of the second thin film transistor and third thin film transistor Open, the data signal line is at a high level, the touch signal level control line controls the touch signal detection module to be turned off, the first illumination control line controls the first thin film transistor to be turned off, and the second illumination control line is controlled The fifth thin film transistor is turned off, the third light emitting control line controls the sixth thin film transistor to be turned off, and the data line signal is transmitted to the first end of the storage capacitor;
  • the scan signal line controls the second thin film transistor to be turned on and the third thin film transistor to be turned off
  • the touch signal level control line controls the touch signal detecting module to be turned on
  • the first light emitting control line controls the first
  • the thin film transistor is turned off
  • the second light emission control line controls the fifth thin film transistor to be turned off
  • the third light emission control line controls the sixth thin film transistor to be turned off
  • the power supply signal is transmitted to the fourth thin film transistor drain, and the current The current through the fourth thin film transistor is transmitted to the driving integrated circuit
  • the touch signal level control line controls the touch signal detecting module to be turned off, and the driving the OLED lighting stage includes:
  • the scan signal line controls the second thin film transistor to be turned on, the third thin film transistor is turned off, the first light emission control line controls the first thin film transistor to be turned on, and the second light emission control line controls the fifth
  • the thin film transistor is turned off, the third light emitting control line controls the sixth thin film transistor to be turned off, the fourth thin film transistor enters a saturation state;
  • the scan signal line controls the second thin film transistor to be turned off, and the third thin film transistor is turned on
  • the first light emission control line controls the first thin film transistor to be turned on, the second light emission control line controls the fifth thin film transistor to be turned on, and the third light emission control line controls the sixth thin film transistor to be turned off.
  • a data line signal is transmitted to the first end of the storage capacitor;
  • the scan signal line controls the second thin film transistor to be turned on, the third thin film transistor is turned off, the first light emission control line controls the first thin film transistor to be turned off, and the second light emission control line controls the fifth thin film The transistor is turned off, the third light emitting control line controls the sixth thin film transistor to be turned on, and the fourth thin film transistor drives the organic light emitting diode to emit light.
  • the driving method of the OLED pixel circuit of the invention has fewer control signals, simple timing, easy implementation of the circuit, and is convenient and practical.
  • FIGS. 1 and 3 are circuit diagrams of a pixel of an organic light emitting diode according to Embodiment 1 of the present invention
  • FIGS. 2 and 4 are timing charts of a pixel circuit for driving an organic light emitting diode according to Embodiment 1 of the present invention
  • FIG. 5 is an equivalent circuit diagram of an initialization phase of a touch detection phase of the OLED pixel circuit of Embodiment 1 of the present invention.
  • FIG. 6 is an equivalent circuit diagram of a data line signal writing phase of a touch detection phase of the OLED pixel circuit of Embodiment 1 of the present invention.
  • FIG. 7 is an equivalent circuit diagram of a signal phase generated by a touch detection in a touch detection phase of an OLED pixel circuit according to Embodiment 1 of the present invention.
  • FIG. 8 is an equivalent circuit diagram of an initialization phase of an organic light emitting diode light emitting phase of an organic light emitting diode pixel circuit according to Embodiment 1 of the present invention
  • FIG. 9 is an equivalent circuit diagram of a data line signal writing phase of an organic light emitting diode of an organic light emitting diode pixel circuit according to Embodiment 1 of the present invention.
  • FIG. 10 is an equivalent circuit diagram of an illuminating phase of an organic light emitting diode of an OLED pixel circuit according to Embodiment 1 of the present invention.
  • T1 first thin film transistor
  • T2 second thin film transistor
  • T3 third thin film transistor
  • T4 fourth thin film transistor
  • T5 fifth thin film transistor
  • T6 sixth thin film transistor
  • T7 a seventh thin film transistor
  • T8 an eighth thin film transistor
  • T9 ninth thin film transistor
  • PD photodiode
  • 0LED organic light emitting diode
  • DD power signal line
  • EM1 first light control line
  • EM2 second light control line
  • EM3 third light control line
  • data data signal line
  • select touch signal level control line
  • Cst storage capacitor
  • C1 first capacitor
  • sensor l ine sensor line.
  • Example 1 The embodiment provides an OLED pixel circuit, including: a data writing unit, a driving unit, an organic light emitting diode, a first control unit, a second control unit, and a touch detecting unit; wherein:
  • the first control unit is configured to introduce a power voltage signal into the data writing unit under the control of the scanning signal line during the touch detection phase and the organic light emitting diode lighting phase, and the organic light emitting diode and the driving unit in the organic light emitting diode lighting stage Conduction
  • the data writing unit is configured to introduce a power voltage signal under the control of the first lighting control line during the touch detection phase and the OLED lighting phase, and import the data line signal under the control of the scanning signal line and the second lighting control line. And also used to supply voltage to the driving unit;
  • the touch detection unit is configured to sense a touch under the control of a touch signal level control line during a touch detection phase, and generate a detection signal;
  • the driving unit is configured to convert the detection signal into a touch output signal under the control of a touch signal level control line during a touch detection phase, and output the touch output signal to the driving integrated circuit via the touch detection unit.
  • the driving unit is further configured to provide a driving current for the organic light emitting diode in an illuminating stage of the organic light emitting diode;
  • the second control unit is configured to conduct the driving unit to a ground level in an organic light emitting diode illumination phase under control of a third lighting control line.
  • the data writing unit includes a first thin film transistor T1, a third thin film transistor T3, a fifth thin film transistor T5, a storage capacitor Cst, and a first capacitor C1; a fourth thin film transistor T4; the first control unit includes a second thin film transistor T2; the second control unit includes a sixth thin film transistor T6; the touch detection unit includes a photodiode PD, a seventh thin film transistor T7, an eighth thin film transistor ⁇ 8, and a ninth Thin film transistor ⁇ 9.
  • the anode of the organic light emitting diode 0LED is connected to the power signal line DD.
  • the organic light emitting diode (OLED) is an upper light emitting type organic light emitting diode; the first end of the storage capacitor Cst is connected to the first end of the first capacitor C1, and the second end of the first capacitor C1 is grounded;
  • a gate of the first thin film transistor T1 is connected to the first light emission control line EM1, and a drain of the first thin film transistor T1 is connected to a second end of the storage capacitor Cst;
  • the gate of the second thin film transistor T2 is connected to the scanning signal line, the source of the second thin film transistor T2 is connected to the cathode of the organic light emitting diode OLED, and the drain of the second thin film transistor T2 is connected to the source of the first thin film transistor T1;
  • the gate of the third thin film transistor T3 is connected to the scanning signal line, the source of the third thin film transistor T3 is connected to the data signal line, and the drain of the third thin film transistor T3 is connected to the first end of the storage capacitor Cst, and the first capacitor is connected at the same time.
  • the gate of the fourth thin film transistor T4 is connected to the second end of the storage capacitor Cst, and is connected to the drain of the first thin film transistor T1, and the source of the fourth thin film transistor T4 is connected to the drain of the second thin film transistor T2;
  • the gate of the fifth thin film transistor T5 is connected to the second light emission control line EM2, the source of the fifth thin film transistor T5 is connected to the drain of the third thin film transistor T3, and the drain of the fifth thin film transistor T5 and the fourth thin film transistor T4. Drain connection
  • the drain of the sixth thin film transistor T6 is grounded, the gate of the sixth thin film transistor T6 is connected to the third light emission control line EM3, and the source of the sixth thin film transistor T6 is connected to the drain of the fifth thin film transistor T5, and is connected to the fourth a drain of the thin film transistor T4;
  • the cathode of the photodiode PD is connected to the gate of the fourth thin film transistor T4, and is connected to the second end of the storage capacitor Cst, and the anode of the photodiode PD is connected to the source of the seventh thin film transistor T7;
  • the drain of the seventh thin film transistor T7 is grounded, and the gate of the seventh thin film transistor T7 is connected to the touch signal level control line;
  • the source of the eighth thin film transistor T8 is connected to the drain of the fourth thin film transistor T4, the drain of the eighth thin film transistor T8 is connected to the sensor line, and the gate of the eighth thin film transistor T8 is connected to the touch signal level control line;
  • the source of the ninth thin film transistor T9 is connected to the power signal line DD, the drain of the ninth thin film transistor T9 is connected to the source of the first thin film transistor T1, and the gate of the ninth thin film transistor T9 is connected to the touch signal level control line. .
  • the first thin film transistor T1 and the second thin film transistor T2 are preferably P-type thin film transistors, third thin film transistors T3, fourth thin film transistors ⁇ 4, fifth thin film transistors ⁇ 5, sixth thin film transistors ⁇ 6, and seventh.
  • the thin film transistor ⁇ 7, the eighth thin film transistor ⁇ 8, and the ninth thin film transistor ⁇ 9 are preferably ⁇ -type thin film transistors.
  • the first thin film transistor ⁇ 1, the second thin film transistor ⁇ 2, and the fourth thin film transistor ⁇ 4 may be selected as a ⁇ -type thin film transistor, a third thin film transistor ⁇ 3, a fifth thin film transistor ⁇ 5,
  • the sixth thin film transistor ⁇ 6, the seventh thin film transistor ⁇ 7, the eighth thin film transistor ⁇ 8, and the ninth thin film transistor ⁇ 9 are selected as ⁇ -type thin film transistors, and the pixel circuit diagram thereof is shown in FIG. 3, and the timing diagram thereof is correspondingly shown in FIG. 4. Shown.
  • the function of turning on or off the thin film transistor it can be realized by changing the level of the control level of the thin film transistor and correspondingly changing the type of the thin film transistor.
  • the fifth thin film transistor is a ⁇ -type thin film transistor, it is turned on under a high level control, and it can also be changed to a ⁇ type thin film transistor and turned on under a low level control.
  • the types of thin film transistors controlled by the same level control signal in a certain unit in this embodiment can be changed, as long as the unit realizes its original function and does not affect other devices to perform their original functions. That is, the object of the present invention can also be achieved in this case.
  • each of the thin film transistors is any one of a polysilicon thin film transistor, a single crystal silicon thin film transistor, an oxide thin film transistor, and an organic thin film transistor.
  • the OLED pixel circuit of the present invention comprises a photodiode, which enables the display screen to have the ability to directly sense the signal generated by the touch, thereby making the control circuit of the pixel simpler, simplifying the process steps, thereby improving production efficiency and products. Yield, the most important is to help reduce production costs.
  • the OLED pixel circuit of the present invention can compensate for the non-uniformity of the threshold voltage of the thin film transistor, thereby improving the picture uniformity of the organic light emitting display.
  • the use of the upper-emitting organic light-emitting diode is advantageous for increasing the aperture ratio of the pixel and reducing the production process of the two-layer indium tin oxide film to effectively improve the light transmittance, thereby improving the display quality of the display.
  • the driving method of the OLED pixel circuit includes a touch signal detecting phase and driving the OLED 0LED illuminating phase, as shown in FIG. 2, the working process is as follows:
  • Phase 1 The touch signal detection phase, which specifically includes:
  • Stage 101 Initialization stage, the equivalent circuit diagram is as shown in FIG. 5, wherein the scanning signal line is low level, the second thin film transistor ⁇ 2 is turned on and the third thin film transistor ⁇ 3 is turned off; the first illuminating control line EM1 is low. Flat, controlling the first thin film transistor T1 to be turned on; The second light-emitting control line EM2 is at a low level, and the fifth thin film transistor T5 is controlled to be turned off; the third light-emitting control line EM3 is at a low level, and the sixth thin film transistor T6 is controlled to be turned off; the touch signal level control line controls the touch signal detecting module. shut down.
  • the power signal is transmitted to the second end of the storage capacitor Cst via the organic light emitting diode OLED, the second thin film transistor T2, and the first thin film transistor T1, and the storage capacitor Cst is charged.
  • the voltage at point B is VDD-Vtholed
  • VDD is the power signal.
  • Line voltage, Vtholed is the turn-on voltage of the OLED OLED.
  • Stage 102 data line signal writing stage, the equivalent circuit diagram is shown in FIG. 6, wherein the scanning signal line is at a high level, controlling the second thin film transistor T2 to be turned off and the third thin film transistor T3 to be turned on; the touch signal level control line When the level is low, the touch signal detection module is turned off; the first light-emitting control line EM1 is at a high level, and the first thin film transistor T1 is controlled to be turned off; the second light-emitting control line EM2 is at a low level, and the fifth thin film transistor T5 is controlled to be turned off.
  • the third light-emitting control line EM3 is at a low level, and controls the sixth thin film transistor T6 to be turned off.
  • Point B is suspended, the data line signal is written to point A via the third thin film transistor T3, the data line signal is transmitted to the first end of the storage capacitor Cst, the voltage at point B is raised to Vdata+VDD-Vtholed, and Vdata is the data line signal voltage.
  • Stage 103 detecting the signal phase generated by the touch, the equivalent circuit diagram is as shown in FIG. 7, wherein the scanning signal line is low level, and the second thin film transistor T2 is turned on and the third thin film transistor T3 is turned off; the touch signal level is The control line is at a high level, and the touch signal detecting module is controlled to be turned on; the first light emitting control line EM1 is at a high level, and the first thin film transistor T1 is controlled to be turned off; the second light emitting control line EM2 is at a low level, and the fifth film is controlled.
  • the transistor T5 is turned off; the third light-emitting control line EM3 is at a low level, and the sixth thin film transistor T6 is controlled to be turned off.
  • the power signal is written to the C point via the ninth thin film transistor T9, the source of the fourth thin film transistor T4 is connected to the C point, the voltage is VDD, and the voltage at the B point is Vdata+VDD-Vtholed 0.
  • the photodiode When the PD is under illumination, the charge on the storage capacitor Cst is greatly reduced due to the leakage current generated by the photodiode PD being illuminated, resulting in a large drop in the voltage at point B, and a decrease in the voltage at point B causes the current flowing through the fourth thin film transistor T4 to decrease. .
  • the photodiode PD If the photodiode PD is under touch (when the light is weak or no light), it will produce less leakage current or no leakage current (ie, generate detection signal) than when the photodiode is under illumination. , correspondingly, through The current of the fourth thin film transistor T4 may become small or not change.
  • the current flowing through the fourth thin film transistor T4 ie, the touch output signal
  • Stage 2 Driving Organic Light Emitting Diodes 0LED Lighting Stage
  • the touch signal level control line controls the touch signal detection module to be turned off, and the stage specifically includes:
  • Phase 201 Precharge phase, the equivalent circuit diagram is as shown in FIG. 8, wherein the scan signal line is low level, and the second thin film transistor T2 is turned on and the third thin film transistor T3 is turned off; the first light emission control line EM1 is low. Level, controlling the first thin film transistor T1 to be turned on; the second light emitting control line EM2 is at a low level, controlling the fifth thin film transistor T5 to be turned off; the third light emitting control line EM3 is at a low level, and controlling the sixth thin film transistor T6 to be turned off.
  • the fourth thin film transistor T4 enters a saturated state and is actually a diode.
  • Stage 202 data line signal writing stage, the equivalent circuit diagram is shown in FIG. 9, wherein the scanning signal line is at a high level, controlling the second thin film transistor T2 to be turned off and the third thin film transistor T3 to be turned on; the first light emitting control line EM1 is low level, and the first thin film transistor T1 is controlled to be turned on; the second light emission control line EM2 is high level, and the fifth thin film transistor T5 is controlled to be turned on; the third light emission control line EM3 is low level, and the sixth thin film is controlled.
  • Transistor T6 is turned off.
  • the fourth thin film transistor T4 is a diode that has entered a saturated state, the data line signal is transmitted to the first end of the storage capacitor Cst, and the voltage drop of the storage capacitor Cst is the threshold voltage Vth4 of the fourth thin film transistor, the fourth film.
  • the gate voltage of the transistor T4 is Vdata+Vth4, and the drain of the fourth thin film transistor T4 is connected to the first end of the storage capacitor Cst, and the voltage thereof is the data line signal voltage Vdata.
  • Stage 203 The illuminating stage of the OLED, the equivalent circuit diagram is shown in FIG. 10, wherein the scanning signal line is at a low level, and the second thin film transistor T2 is turned on and the third thin film transistor T3 is turned off; the first illuminating control line EM1 When the level is high, the first thin film transistor T1 is turned off; the second light emitting control line EM2 is at a low level, and the fifth thin film transistor T5 is controlled to be turned off; the third light emitting control line EM3 is at a high level, and the sixth thin film transistor T6 is controlled. through.
  • Current which can be expressed For:
  • the current is independent of the threshold voltage Vth4 of the fourth thin film transistor T4 and the voltage across the organic light emitting diode OLED, which substantially eliminates the influence of the threshold voltage non-uniformity, the drift, and the non-uniformity of the OLED OLED electrical performance. Therefore, the current flowing through the fourth thin film transistor T4 has uniformity, so that the current flowing through the organic light emitting diode OLED is also uniform, and the organic light emitting diode is a current type light emitting device, whereby the brightness of the organic light emitting diode has uniformity, thereby improving The brightness uniformity of the picture of the organic light-emitting display.
  • the data line signal voltage may be a range, that is, the data line signal voltage within a certain range enables the fourth thin film transistor to drive the organic light emitting diode to emit light.
  • the switching time between the above phase 1 and phase 2 is extremely short, that is, the detection of the touch is generated.
  • the signal and drive of the organic light emitting diode to illuminate to display the desired content is done in a very short time.
  • the driving method of the OLED pixel circuit described above has few control signals, the timing is simple, the circuit is easy to implement, and is convenient and practical.
  • the present embodiment provides a display device including the above-described organic light emitting diode pixel circuit, and of course, a known structure such as a substrate.
  • the display device may be an OLED display device or a 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, or the like using the 0 LED display technology.
  • the display device of the present embodiment includes the above-described organic light emitting diode pixel circuit, the overall thickness of the display device is thinner, the weight is lighter, and the production cost is further reduced.
  • the sensitivity of the display sensing touch can be significantly improved by providing the above-described circuit in each sub-pixel, and since the photodiode operates by sensing the light change, a floating touch can be realized on the display screen.

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Abstract

一种有机发光二极管像素电路及其驱动方法、显示装置，解决现有技术中内置型触摸屏的控制电路和制造工艺较为复杂的问题。有机发光二极管像素电路包括数据写入单元、驱动单元、有机发光二极管（OLED）、第一控制单元、第二控制单元和触摸侦测单元，第一控制单元用于将电源信号导入数据写入单元，将有机发光二极管（OLED）和驱动单元导通；数据写入单元用于导入电源电压信号和数据线电压信号，同时还用于为驱动单元提供电压；触摸侦测单元用于感受触摸，并产生侦测信号；驱动单元用于将侦测信号转变为触控输出信号，并经触摸侦测单元将触控输出信号输出到驱动集成电路，还用于为有机发光二极管（OLED）提供驱动电流；第二控制单元用于将驱动单元与接地电平导通。

Description

有机发光二极管像素电路及其驱动方法、 显示装置
技术领域
本发明属于触摸显示技术领域， 具体涉及有机发光二极管像素 电路及其驱动方法、 显示装置。 背景技术
触摸屏 （touch screen panel ) 是目前最简单、 方便、 自然的 一种人机交互的设备， 已经在各种各样的电子产品中得到了广泛应 用， 如手机， 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 摸屏是在显示面板上面设置一个触摸装置，触摸装置一般包括触摸板 和保护层（如金刚玻璃） ， 触摸板设置在显示面板之上， 触摸屏靠触 摸板感知光线或压力的变化来工作。
内置型触摸屏技术是将触摸板感知信号的功能嵌入到像素电路 中， 通过加载控制电路， 使得显示屏具备感知触摸信号的能力。
发明人发现现有技术中至少存在如下问题： 对于内置型触摸屏， 把触摸板感知信号的功能嵌入到像素电路中， 其控制电路较为复杂， 制造工艺也较为复杂， 不利于产品良率和生产效率的提高。另外， 对 于内置型触摸屏，其像素的开口率会降低，进而导致显示屏显示品质 下降。 发明内容
本发明所要解决的技术问题包括， 针对现有技术中内置型触摸 屏的控制电路和制造工艺较为复杂从而不利于提高产品良率和生产 效率的问题，提供一种控制电路和制造工艺都较为简单的有机发光二 极管像素电路及其驱动方法、 显示装置。
解决本发明技术问题所采用的技术方案是一种有机发光二极管 像素电路包括数据写入单元、驱动单元、有机发光二极管、第一控制 单元、 第二控制单元和触摸侦测单元； 其中：
所述第一控制单元用于在触摸侦测阶段和有机发光二极管发光 阶段在扫描信号线的控制下将电源电压信号导入数据写入单元，并在 有机发光二极管发光阶段将有机发光二极管和驱动单元导通；
所述数据写入单元用于在触摸侦测阶段和有机发光二极管发光 阶段在第一发光控制线控制下导入电源电压信号，并在扫描信号线及 第二发光控制线的控制下导入数据线信号，同时还用于为所述驱动单 元提供电压；
所述触摸侦测单元用于在触摸侦测阶段在触摸信号电平控制线 控制下感测触摸， 并产生侦测信号；
所述驱动单元用于在触摸侦测阶段在触摸信号电平控制线的控 制下将所述侦测信号转变为触控输出信号，并经触摸侦测单元将触控 输出信号输出到驱动集成电路，同时驱动单元还用于在有机发光二极 管发光阶段为所述有机发光二极管提供驱动电流；
所述第二控制单元用于在第三发光控制线的控制下在有机发光 二极管发光阶段将所述驱动单元与接地电平导通。
优选的是， 所述有机发光二极管的阳极与电源连接。
优选的是， 所述数据写入单元包括： 第一薄膜晶体管、 第三薄 膜晶体管、 第五薄膜晶体管、 存储电容和第一电容； 其中，
所述第一薄膜晶体管的栅极与第一发光控制线连接， 所述第一 薄膜晶体管的漏极与所述存储电容的第二端连接；
所述第三薄膜晶体管的栅极与扫描信号线连接， 所述第三薄膜 晶体管的源极与数据信号线连接，所述第三薄膜晶体管的漏极连接所 述存储电容的第一端；
所述第五薄膜晶体管的栅极与第二发光控制线连接， 所述第五 薄膜晶体管的源极与所述第三薄膜晶体管的漏极连接，所述第五薄膜 晶体管的漏极与所述驱动单元连接；
所述第一电容的第一端与存储电容的第一端连接， 所述第一电 容的第二端接地。
优选的是， 所述第一控制单元包括第二薄膜晶体管， 所述第二 薄膜晶体管的栅极与扫描信号线连接，源极与所述有机发光二极管的 阴极连接， 漏极与所述数据写入单元中的第一薄膜晶体管的源极连 接。
优选的是， 所述驱动单元包括第四薄膜晶体管， 所述第四薄膜 晶体管的栅极与所述存储电容的第二端和所述数据写入单元的第一 薄膜晶体管的漏极连接，所述第四薄膜晶体管的源极与所述第二薄膜 晶体管的漏极连接。
优选的是， 所述第二控制单元包括第六薄膜晶体管， 第六薄膜 晶体管的漏极接地， 第六薄膜晶体管的栅极与第三发光控制线连接， 第六薄膜晶体管的源极与所述数据写入单元中的所述第五薄膜晶体 管的漏极连接。
优选的是， 所述触摸侦测单元包括光电二极管、 第七薄膜晶体 管、 第八薄膜晶体管和第九薄膜晶体管， 其中：
所述光电二极管的阴极与所述第四薄膜晶体管的栅极连接， 同 时与所述数据写入单元中的所述存储电容的第二端的连接，所述光电 二极管的阳极与所述第七薄膜晶体管的源极连接；
所述第七薄膜晶体管的漏极接地， 所述第七薄膜晶体管的栅极 与触摸信号电平控制线连接；
所述第八薄膜晶体管的源极与所述第四薄膜晶体管的漏极连 接，所述第八薄膜晶体管的漏极与传感器线连接，所述第八薄膜晶体 管的栅极与触摸信号电平控制线连接；
所述第九薄膜晶体管的源极与电源信号线连接， 所述第九薄膜 晶体管的漏极与所述数据写入单元中的所述第一薄膜晶体管的源极 连接， 所述第九薄膜晶体管的栅极与所述触摸信号电平控制线连接。
优选的是， 所述第一薄膜晶体管和第二薄膜晶体管是 P型薄膜 晶体管， 所述第三薄膜晶体管、 第四薄膜晶体管、 第五薄膜晶体管、 第六薄膜晶体管、第七薄膜晶体管、第八薄膜晶体管、第九薄膜晶体 管是 N型薄膜晶体管；
或所述第一薄膜晶体管、第二薄膜晶体管和第四薄膜晶体管是 N 型薄膜晶体管， 所述第三薄膜晶体管、第五薄膜晶体管、第六薄膜晶 体管、第七薄膜晶体管、第八薄膜晶体管、第九薄膜晶体管是 P型薄 膜晶体管。
优选的是， 所述第一至第九薄膜晶体管为多晶硅薄膜晶体管、 单晶硅薄膜晶体管、氧化物薄膜晶体管、有机薄膜晶体管中的任意一 种。
优选的是， 所述有机发光二极管为上发光型有机发光二极管。 本发明的有机发光二极管像素电路包括光电二极管， 其使得显 示屏具有能够直接感知触摸所产生的信号的能力，从而使得像素的控 制电路更为简单，工艺步骤得到简化，进而提高了生产效率以及产品 良率， 最重要是有利于降低生产成本。 同时， 本发明的有机发光二极 管像素电路能够补偿薄膜晶体管的阈值电压的非均匀性，从而能够提 高有机发光显示器的画面均匀性。另外，生产工艺上减少了两层氧化 铟锡薄膜能有效提高光透过率， 从而能提升显示屏的显示品质。
本发明还提供一种显示装置， 其包括上述的有机发光二极管像 素电路。
本发明的显示装置由于包括上述的有机发光二极管像素电路， 因此显示装置的整体厚度更薄，重量更轻，生产成本也会进一步降低。 通过在每个亚像素中设置上述电路可以明显地提高显示屏感测触摸 的灵敏度，而且由于光电二极管是通过感测光线变化来工作的，所以 能够在显示屏幕上实现浮动触摸。
解决本发明技术问题所采用的技术方案是上述有机发光二极管 像素电路的驱动方法，包括触摸信号侦测阶段和驱动有机发光二极管 发光阶段， 其中：
所述触摸信号侦测阶段包括：
扫描信号线控制所述第二薄膜晶体管导通及第三薄膜晶体管截 止，所述第一发光控制线控制所述第一薄膜晶体管导通，所述第二发 光控制线控制所述第五薄膜晶体管截止，所述第三发光控制线控制所 述第六薄膜晶体管截止，触摸信号电平控制线控制所述触摸信号侦测 模块关闭， 电源信号传输给所述存储电容的第二端；
扫描信号线控制所述第二薄膜晶体管截止及第三薄膜晶体管打 开，数据信号线为高电平，触摸信号电平控制线控制所述触摸信号侦 测模块关闭，所述第一发光控制线控制所述第一薄膜晶体管截止，所 述第二发光控制线控制所述第五薄膜晶体管截止，所述第三发光控制 线控制所述第六薄膜晶体管截止，数据线信号传输给所述存储电容的 第 ~ "端；
扫描信号线控制所述第二薄膜晶体管导通及所述第三薄膜晶体 管截止，触摸信号电平控制线控制所述触摸信号侦测模块导通，所述 第一发光控制线控制所述第一薄膜晶体管截止，所述第二发光控制线 控制所述第五薄膜晶体管截止，所述第三发光控制线控制所述第六薄 膜晶体管截止， 电源信号传输给所述第四薄膜晶体管漏极，流经所述 第四薄膜晶体管的电流传送给驱动集成电路；
所述驱动有机发光二极管发光阶段内， 触摸信号电平控制线控 制所述触摸信号侦测模块关闭，且所述驱动有机发光二极管发光阶段 包括：
扫描信号线控制所述第二薄膜晶体管导通， 所述第三薄膜晶体 管截止，所述第一发光控制线控制所述第一薄膜晶体管导通，所述第 二发光控制线控制所述第五薄膜晶体管截止，所述第三发光控制线控 制所述第六薄膜晶体管截止， 所述第四薄膜晶体管进入饱和状态； 扫描信号线控制所述第二薄膜晶体管截止， 所述第三薄膜晶体 管导通，所述第一发光控制线控制所述第一薄膜晶体管导通，所述第 二发光控制线控制所述第五薄膜晶体管导通，所述第三发光控制线控 制所述第六薄膜晶体管截止，数据线信号传输给所述存储电容的第一 端；
扫描信号线控制所述第二薄膜晶体管导通， 所述第三薄膜晶体 管截止，所述第一发光控制线控制所述第一薄膜晶体管截止，所述第 二发光控制线控制所述第五薄膜晶体管截止，所述第三发光控制线控 制所述第六薄膜晶体管导通，所述第四薄膜晶体管驱动有机发光二极 管发光。
本发明的有机发光二极管像素电路的驱动方法控制信号少， 时 序简单， 电路容易实现， 方便实用。 附图说明
图 1和图 3为本发明的实施例 1的有机发光二极管像素电路图； 图 2和图 4为本发明的实施例 1的驱动有机发光二极管像素电 路的时序图；
图 5为本发明的实施例 1的有机发光二极管像素电路的触摸侦 测阶段的初始化阶段的等效电路图；
图 6为本发明的实施例 1的有机发光二极管像素电路的触摸侦 测阶段的数据线信号写入阶段的等效电路图；
图 7为本发明的实施例 1的有机发光二极管像素电路的触摸侦 测阶段的侦测触摸产生的信号阶段的等效电路图；
图 8为本发明的实施例 1的有机发光二极管像素电路的有机发 光二极管发光阶段的初始化阶段的等效电路图；
图 9为本发明的实施例 1的有机发光二极管像素电路的有机发 光二极管发光阶段的数据线信号写入阶段的等效电路图；
图 10为本发明的实施例 1的有机发光二极管像素电路的有机发 光二极管发光阶段的等效电路图；
其中附图标记为： T1 : 第一薄膜晶体管； T2: 第二薄膜晶体管; T3: 第三薄膜晶体管； T4: 第四薄膜晶体管； T5: 第五薄膜晶体管； T6: 第六薄膜晶体管； T7: 第七薄膜晶体管； T8: 第八薄膜晶体管；
T9: 第九薄膜晶体管； PD :光电二极管； 0LED: 有机发光二极管； DD: 电源信号线； EM1 : 第一发光控制线； EM2: 第二发光控制线； EM3: 第三发光控制线； scan: 扫描信号线； data: 数据信号线； select: 触摸信号电平控制线； Cst: 存储电容； C1 : 第一电容； sensor l ine: 传感器线。 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 附图和具体实施方式对本发明作进一步详细描述。
实施例 1 : 本实施例提供一种有机发光二极管像素电路， 其包括： 数据写入单元、 驱动单元、 有机发光二极管、 第一控制单元、 第二控制单元和触摸侦测单元； 其中：
所述第一控制单元用于在触摸侦测阶段和有机发光二极管发光 阶段在扫描信号线的控制下将电源电压信号导入数据写入单元，并在 有机发光二极管发光阶段将有机发光二极管和驱动单元导通；
所述数据写入单元用于在触摸侦测阶段和有机发光二极管发光 阶段在第一发光控制线控制下导入电源电压信号，并在扫描信号线及 第二发光控制线的控制下导入数据线信号，同时还用于为所述驱动单 元提供电压；
所述触摸侦测单元用于在触摸侦测阶段在触摸信号电平控制线 控制下感测触摸， 并产生侦测信号；
所述驱动单元用于在触摸侦测阶段在触摸信号电平控制线的控 制下将所述侦测信号转变为触控输出信号，并经触摸侦测单元将触控 输出信号输出到驱动集成电路，同时驱动单元还用于在有机发光二极 管发光阶段为所述有机发光二极管提供驱动电流；
所述第二控制单元用于在第三发光控制线的控制下在有机发光 二极管发光阶段将所述驱动单元与接地电平导通。
本实施例中， 如图 1所示， 优选的， 数据写入单元包括第一薄 膜晶体管 Tl、第三薄膜晶体管 Τ3、第五薄膜晶体管 Τ5、存储电容 Cst 和第一电容 C1 ; 驱动单元包括第四薄膜晶体管 T4; 第一控制单元包 括第二薄膜晶体管 T2 ; 第二控制单元包括第六薄膜晶体管 T6; 触摸 侦测单元包括光电二极管 PD、 第七薄膜晶体管 T7、 第八薄膜晶体管 Τ8和第九薄膜晶体管 Τ9。
具体地， 有机发光二极管 0LED的阳极与电源信号线 DD连接。 进一步优选的， 有机发光二极管 0LED为上发光型有机发光二极管； 存储电容 Cst的第一端与第一电容 C1的第一端连接， 第一电容 C1的第二端接地；
第一薄膜晶体管 T1的栅极与第一发光控制线 EM1连接， 第一薄 膜晶体管 T1的漏极与存储电容 Cst的第二端连接； 第二薄膜晶体管 T2的栅极与扫描信号线连接， 第二薄膜晶体管 Τ2 的源极与有机发光二极管 0LED的阴极连接， 第二薄膜晶体管 Τ2 的漏极与第一薄膜晶体管 T1的源极连接；
第三薄膜晶体管 Τ3的栅极与扫描信号线连接， 第三薄膜晶体管 Τ3的源极与数据信号线连接，第三薄膜晶体管 Τ3的漏极连接存储电 容 Cst的第一端， 同时连接第一电容 C1的第一端；
第四薄膜晶体管 T4的栅极与存储电容 Cst的第二端连接， 同时 与第一薄膜晶体管 T1的漏极连接，第四薄膜晶体管 T4的源极与第二 薄膜晶体管 T2的漏极连接；
第五薄膜晶体管 T5的栅极与第二发光控制线 EM2连接， 第五薄 膜晶体管 T5的源极与第三薄膜晶体管 T3的漏极连接，第五薄膜晶体 管 T5的漏极与第四薄膜晶体管 T4的漏极连接；
第六薄膜晶体管 T6的漏极接地， 第六薄膜晶体管 T6的栅极与 第三发光控制线 EM3连接， 第六薄膜晶体管 T6的源极与第五薄膜晶 体管 T5的漏极连接， 同时连接第四薄膜晶体管 T4的漏极；
光电二极管 PD的阴极与第四薄膜晶体管 T4的栅极连接， 同时 与存储电容 Cst的第二端连接， 光电二极管 PD的阳极与第七薄膜晶 体管 T7的源极连接；
第七薄膜晶体管 T7的漏极接地， 第七薄膜晶体管 T7的栅极与 触摸信号电平控制线连接；
第八薄膜晶体管 T8的源极与第四薄膜晶体管 T4的漏极连接， 第八薄膜晶体管 T8的漏极与传感器线连接，第八薄膜晶体管 T8的栅 极与触摸信号电平控制线连接；
第九薄膜晶体管 T9的源极与电源信号线 DD连接， 第九薄膜晶 体管 T9的漏极与第一薄膜晶体管 T1 的源极连接， 第九薄膜晶体管 T9的栅极与触摸信号电平控制线连接。
在本实施例中， 第一薄膜晶体管 T1和第二薄膜晶体管 T2优选 为 P型薄膜晶体管， 第三薄膜晶体管 T3、 第四薄膜晶体管 Τ4、 第五 薄膜晶体管 Τ5、 第六薄膜晶体管 Τ6、 第七薄膜晶体管 Τ7、 第八薄膜 晶体管 Τ8、 第九薄膜晶体管 Τ9优选为 Ν型薄膜晶体管。 需要说明的是， 在本实施例中也可以把第一薄膜晶体管 τι、 第 二薄膜晶体管 Τ2和第四薄膜晶体管 Τ4选定为 Ν型薄膜晶体管，第三 薄膜晶体管 Τ3、 第五薄膜晶体管 Τ5、 第六薄膜晶体管 Τ6、 第七薄膜 晶体管 Τ7、第八薄膜晶体管 Τ8、第九薄膜晶体管 Τ9选定为 Ρ型薄膜 晶体管，此时其像素电路图如图 3所示，相应地其时序图如图 4所示。
显然， 为了实现薄膜晶体管的导通或关断的功能， 可以通过改 变该薄膜晶体管的控制电平的高低和相应地改变该薄膜晶体管的类 型来实现。如第五薄膜晶体管为 Ν型薄膜晶体管时在高电平控制下导 通，也可以把其改变为 Ρ型薄膜晶体管而在低电平控制下导通。遵照 此思路也可以改变本实施例中某个单元中的受同一个电平控制信号 控制的各薄膜晶体管的类型，只要保证该单元实现其原有的功能及不 影响其他器件发挥其原有功能即可，在这种情况下也可以实现本发明 的目的。
优选的， 各薄膜晶体管为多晶硅薄膜晶体管、 单晶硅薄膜晶体 管、 氧化物薄膜晶体管、 有机薄膜晶体管中的任意一种。
本发明的有机发光二极管像素电路包括光电二极管， 其使得显 示屏具有能够直接感知触摸所产生的信号的能力，从而使得像素的控 制电路更为简单，工艺步骤得到简化，进而提高了生产效率以及产品 良率， 最重要是有利于降低生产成本。 同时， 本发明的有机发光二极 管像素电路能够补偿薄膜晶体管的阈值电压的非均匀性，从而能够提 高有机发光显示器的画面均匀性。另外，采用上发光型有机发光二极 管有利于提高像素的开口率以及生产工艺上减少了两层氧化铟锡薄 膜能有效提高光透过率， 从而提升了显示屏的显示品质。
结合图 1，有机发光二极管像素电路的驱动方法包括触摸信号侦 测阶段和驱动有机发光二极管 0LED发光阶段， 如图 2所示， 其工作 过程如下：
阶段 1 : 触摸信号侦测阶段， 其具体包括：
阶段 101 : 初始化阶段， 其等效电路图如图 5所示， 其中扫描信 号线为低电平， 控制第二薄膜晶体管 Τ2 导通及第三薄膜晶体管 Τ3 截止；第一发光控制线 EM1为低电平，控制第一薄膜晶体管 T1导通; 第二发光控制线 EM2为低电平， 控制第五薄膜晶体管 T5截止； 第三 发光控制线 EM3为低电平， 控制第六薄膜晶体管 T6截止； 触摸信号 电平控制线控制触摸信号侦测模块关闭。
从而，电源信号经由有机发光二极管 0LED,第二薄膜晶体管 T2， 第一薄膜晶体管 T1传输给存储电容 Cst的第二端， 对存储电容 Cst 进行充电， B点电压为 VDD-Vtholed，VDD为电源信号线电压， Vtholed 为有机发光二极管 0LED的开启电压。
阶段 102: 数据线信号写入阶段， 其等效电路图如图 6所示， 其 中扫描信号线为高电平， 控制第二薄膜晶体管 T2截止及第三薄膜晶 体管 T3打开； 触摸信号电平控制线为低电平， 控制触摸信号侦测模 块关闭； 第一发光控制线 EM1为高电平， 控制第一薄膜晶体管 T1截 止； 第二发光控制线 EM2为低电平， 控制第五薄膜晶体管 T5截止； 第三发光控制线 EM3为低电平， 控制第六薄膜晶体管 T6截止。 B点 悬空， 数据线信号经由第三薄膜晶体管 T3写入 A点， 数据线信号传 输给存储电容 Cst的第一端， B点电压升高到 Vdata+VDD-Vtholed， Vdata为数据线信号电压。
阶段 103:侦测触摸产生的信号阶段，其等效电路图如图 7所示， 其中扫描信号线为低电平， 控制第二薄膜晶体管 T2导通及第三薄膜 晶体管 T3截止； 触摸信号电平控制线为高电平， 控制触摸信号侦测 模块导通； 第一发光控制线 EM1为高电平， 控制第一薄膜晶体管 T1 截止；第二发光控制线 EM2为低电平，控制第五薄膜晶体管 T5截止； 第三发光控制线 EM3为低电平， 控制第六薄膜晶体管 T6截止。
从而， 电源信号经由第九薄膜晶体管 T9管写入 C点， 第四薄膜 晶体管 T4 的源极与 C 点连接， 其电压为 VDD， B 点电压为 Vdata+VDD-Vtholed0此时， 如果光电二极管 PD处于光照下， 存储电 容 Cst上的电荷由于光电二极管 PD受光照所产生的漏电流而大幅减 少， 导致 B点电压大幅下降， B点电压下降会导致流经第四薄膜晶体 管 T4的电流减小。如果光电二极管 PD处于触摸（此时光线减弱或无 光照）之下， 相对于上述光电二极管处在光照下的情况， 其会产生较 小的漏电流或者没有漏电流（即产生侦测信号）产生， 相应地， 流经 第四薄膜晶体管 T4的电流会小幅变小或者不发生变化。 上述流经第 四薄膜晶体管 T4的电流（也即触控输出信号）经第八薄膜晶体管 T8 并由传感器线传输到驱动集成电路 （图 1中未示出） 进行侦测解析。
阶段 2 : 驱动有机发光二极管 0LED发光阶段
在该阶段内， 触摸信号电平控制线控制触摸信号侦测模块关闭， 该阶段具体包括：
阶段 201 : 预充电阶段， 其等效电路图如图 8所示， 其中扫描信 号线为低电平， 控制第二薄膜晶体管 T2 导通及第三薄膜晶体管 T3 截止；第一发光控制线 EM1为低电平，控制第一薄膜晶体管 T1导通; 第二发光控制线 EM2为低电平， 控制第五薄膜晶体管 T5截止； 第三 发光控制线 EM3为低电平， 控制第六薄膜晶体管 T6截止。 第四薄膜 晶体管 T4进入饱和状态， 实为一个二极体。
阶段 202 : 数据线信号写入阶段， 其等效电路图如图 9所示， 其 中扫描信号线为高电平， 控制第二薄膜晶体管 T2截止及第三薄膜晶 体管 T3导通； 第一发光控制线 EM1为低电平， 控制第一薄膜晶体管 T1导通； 第二发光控制线 EM2为高电平， 控制第五薄膜晶体管 T5导 通； 第三发光控制线 EM3为低电平， 控制第六薄膜晶体管 T6截止。 此时由于第四薄膜晶体管 T4为已进入饱和状态的二极体， 数据线信 号传输给存储电容 Cst的第一端，存储电容 Cst的压降为第四薄膜晶 体管的阈值电压 Vth4，第四薄膜晶体管 T4的栅极电压为 Vdata+Vth4， 第四薄膜晶体管 T4的漏极与存储电容 Cst的第一端相连接， 其电压 为数据线信号电压 Vdata。
阶段 203 : 有机发光二极管发光阶段， 其等效电路图如图 10所 示， 其中扫描信号线为低电平， 控制第二薄膜晶体管 T2导通及第三 薄膜晶体管 T3截止； 第一发光控制线 EM1为高电平， 控制第一薄膜 晶体管 T1截止； 第二发光控制线 EM2为低电平， 控制第五薄膜晶体 管 T5截止； 第三发光控制线 EM3为高电平， 控制第六薄膜晶体管 T6 导通。 此时第四薄膜晶体管 T4 的漏极接地， 其栅极电压仍为 Vdata+Vth4, 即栅源电压 Vgs=Vdata+Vth4, 同时， 流经第四薄膜晶 体管 T4的电流也是流经有机发光二极管 0LED的电流，该电流可表示 为：
I=K (Vgs-Vth4) 2=Κ (Vdata+Vth4-Vth4) 2=Κ (Vdata) 2
由上式可知， 该电流与第四薄膜晶体管 T4的阈值电压 Vth4和 有机发光二极管 0LED两端的电压无关， 基本消除了阈值电压非均匀 性、 漂移以及有机发光二极管 0LED电气性能非均匀性的影响， 因此 流经第四薄膜晶体管 T4的电流具有均匀性， 从而流经有机发光二极 管 0LED电流也具有均匀性， 而有机发光二极管是电流型发光器件， 由此有机发光二极管的亮度具有均匀性，进而提高了有机发光显示屏 的画面的亮度均匀性。
需要说明的是， 在阶段 202中数据线信号电压可以是一个范围， 即在一定范围内的数据线信号电压均能使第四薄膜晶体管驱动有机 发光二极管发光。
还需要说明的是， 在有机发光二极管像素电路工作过程中， 由 于像素电路对输入信号的反应十分迅速， 因此上述阶段 1 和阶段 2 之间的切换时间是极其短暂的，即侦测触摸产生的信号与驱动有机发 光二极管发光从而显示所需内容是在极短的时间内完成的。
上述有机发光二极管像素电路的驱动方法控制信号少， 时序简 单， 电路容易实现， 方便实用。
实施例 2:
本实施例提供一种显示装置， 其包括上述的有机发光二极管像 素电路，当然还包括如基板等已知的结构。所述显示装置可以为 0LED 显示装置或者使用 0LED显示技术的手机、 平板电脑、 电视机、 显示 器、 笔记本电脑、 数码相框、 导航仪等具有显示功能的产品或部件。
本实施例的显示装置由于包括上述的有机发光二极管像素电 路， 因此显示装置的整体厚度更薄， 重量更轻， 生产成本也会进一步 降低。通过在每个亚像素中设置上述电路可以明显地提高显示屏感测 触摸的灵敏度， 而且由于光电二极管是通过感测光线变化来工作的， 所以能够在显示屏幕上实现浮动触摸。 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。
本发明的实施例可以省略上述技术特征中的一些技术特征， 仅 解决现有技术中存在的部分技术问题。而且，所公开的技术特征可以 进行任意组合。 本发明的范围由所附权利要求及其等价表述来限定， 本领域其他技术人员可以对所附权利要求中所公开的技术方案进行 各种变型和组合。

Claims

权利要求
1. 一种有机发光二极管像素电路， 包括数据写入单元、 驱动单 元、有机发光二极管、第一控制单元、第二控制单元和触摸侦测单元， 其中，
所述第一控制单元用于在触摸侦测阶段和有机发光二极管发光 阶段在扫描信号线的控制下将电源电压信号导入数据写入单元，并在 有机发光二极管发光阶段将有机发光二极管和驱动单元导通，
所述数据写入单元用于在触摸侦测阶段和有机发光二极管发光 阶段在第一发光控制线控制下导入电源电压信号，并在扫描信号线及 第二发光控制线的控制下导入数据线信号，同时还用于为所述驱动单 元提供电压，
所述触摸侦测单元用于在触摸侦测阶段在触摸信号电平控制线 控制下感测触摸， 并产生侦测信号，
所述驱动单元用于在触摸侦测阶段在触摸信号电平控制线的控 制下将所述侦测信号转变为触控输出信号，并经触摸侦测单元将触控 输出信号输出到驱动集成电路，同时驱动单元还用于在有机发光二极 管发光阶段为所述有机发光二极管提供驱动电流，
所述第二控制单元用于在第三发光控制线的控制下在有机发光 二极管发光阶段将所述驱动单元与接地电平导通。
2. 根据权利要求 1所述的有机发光二极管像素电路， 其中， 所 述有机发光二极管的阳极与电源连接。
3. 根据权利要求 2所述的有机发光二极管像素电路， 其中， 所 述数据写入单元包括： 第一薄膜晶体管、第三薄膜晶体管、第五薄膜 晶体管、 存储电容和第一电容， 其中，
所述第一薄膜晶体管的栅极与第一发光控制线连接， 所述第一 薄膜晶体管的漏极与所述存储电容的第二端连接，
所述第三薄膜晶体管的栅极与扫描信号线连接， 所述第三薄膜 晶体管的源极与数据信号线连接，所述第三薄膜晶体管的漏极连接所 述存储电容的第一端，
所述第五薄膜晶体管的栅极与第二发光控制线连接， 所述第五 薄膜晶体管的源极与所述第三薄膜晶体管的漏极连接，所述第五薄膜 晶体管的漏极与所述驱动单元连接，
所述第一电容的第一端与存储电容的第一端连接， 所述第一电 容的第二端接地。
4. 根据权利要求 3所述的有机发光二极管像素电路， 其中， 所 述第一控制单元包括第二薄膜晶体管，所述第二薄膜晶体管的栅极与 扫描信号线连接，源极与所述有机发光二极管的阴极连接，漏极与所 述数据写入单元中的第一薄膜晶体管的源极连接。
5. 根据权利要求 4所述的有机发光二极管像素电路， 其中， 所 述驱动单元包括第四薄膜晶体管，所述第四薄膜晶体管的栅极与所述 存储电容的第二端和所述数据写入单元的第一薄膜晶体管的漏极连 接， 所述第四薄膜晶体管的源极与所述第二薄膜晶体管的漏极连接。
6. 根据权利要求 5所述的有机发光二极管像素电路， 其中， 所 述第二控制单元包括第六薄膜晶体管， 第六薄膜晶体管的漏极接地， 第六薄膜晶体管的栅极与第三发光控制线连接，第六薄膜晶体管的源 极与所述数据写入单元中的所述第五薄膜晶体管的漏极连接。
7. 根据权利要求 6所述的有机发光二极管像素电路， 其中， 所 述触摸侦测单元包括光电二极管、第七薄膜晶体管、第八薄膜晶体管 和第九薄膜晶体管， 其中，
所述光电二极管的阴极与所述第四薄膜晶体管的栅极连接， 同 时与所述数据写入单元中的所述存储电容的第二端的连接，所述光电 二极管的阳极与所述第七薄膜晶体管的源极连接，
所述第七薄膜晶体管的漏极接地， 所述第七薄膜晶体管的栅极 与触摸信号电平控制线连接，
所述第八薄膜晶体管的源极与所述第四薄膜晶体管的漏极连 接，所述第八薄膜晶体管的漏极与传感器线连接，所述第八薄膜晶体 管的栅极与触摸信号电平控制线连接，
所述第九薄膜晶体管的源极与电源信号线连接， 所述第九薄膜 晶体管的漏极与所述数据写入单元中的所述第一薄膜晶体管的源极 连接， 所述第九薄膜晶体管的栅极与所述触摸信号电平控制线连接。
8. 根据权利要求 7所述的有机发光二极管像素的电路， 其中， 所述第一薄膜晶体管和第二薄膜晶体管是 P型薄膜晶体管，所述第三 薄膜晶体管、 第四薄膜晶体管、 第五薄膜晶体管、 第六薄膜晶体管、 第七薄膜晶体管、第八薄膜晶体管、第九薄膜晶体管是 N型薄膜晶体 管， 或者
所述第一薄膜晶体管、 第二薄膜晶体管和第四薄膜晶体管是 N 型薄膜晶体管， 所述第三薄膜晶体管、第五薄膜晶体管、第六薄膜晶 体管、第七薄膜晶体管、第八薄膜晶体管、第九薄膜晶体管是 P型薄 膜晶体管。
9. 根据权利要求 2至 8中任意一项所述的有机发光二极管像素 电路，其中，所述第一薄膜晶体管至第九薄膜晶体管为多晶硅薄膜晶 体管、单晶硅薄膜晶体管、氧化物薄膜晶体管、有机薄膜晶体管中的 任意一种。
10. 根据权利要求 1所述的有机发光二极管像素电路， 其中， 所述有机发光二极管为上发光型有机发光二极管。
11. 一种显示装置， 其特征在于， 包括权利要求 1至 10任意一 项所述的有机发光二极管像素电路。
12. 一种有机发光二极管像素电路的驱动方法， 所述有机发光 二极管像素电路如权利要求 7所述，所述方法包括触摸信号侦测阶段 和驱动有机发光二极管发光阶段， 其中：
所述触摸信号侦测阶段包括：
扫描信号线控制所述第二薄膜晶体管导通及第三薄膜晶体管截 止，所述第一发光控制线控制所述第一薄膜晶体管导通，所述第二发 光控制线控制所述第五薄膜晶体管截止，所述第三发光控制线控制所 述第六薄膜晶体管截止，触摸信号电平控制线控制所述触摸信号侦测 模块关闭， 电源信号传输给所述存储电容的第二端；
扫描信号线控制所述第二薄膜晶体管截止及第三薄膜晶体管打 开，数据信号线置高电平，触摸信号电平控制线控制所述触摸信号侦 测模块关闭，所述第一发光控制线控制所述第一薄膜晶体管截止，所 述第二发光控制线控制所述第五薄膜晶体管截止，所述第三发光控制 线控制所述第六薄膜晶体管截止，数据线信号传输给所述存储电容的 第 ~ "端；
扫描信号线控制所述第二薄膜晶体管导通及所述第三薄膜晶体 管截止，触摸信号电平控制线控制所述触摸信号侦测模块导通，所述 第一发光控制线控制所述第一薄膜晶体管截止，所述第二发光控制线 控制所述第五薄膜晶体管截止，所述第三发光控制线控制所述第六薄 膜晶体管截止， 电源信号传输给所述第四薄膜晶体管漏极，流经所述 第四薄膜晶体管的电流传送给驱动集成电路；
所述驱动有机发光二极管发光阶段内， 触摸信号电平控制线控 制所述触摸信号侦测模块关闭，且所述驱动有机发光二极管发光阶段 包括：
扫描信号线控制所述第二薄膜晶体管导通， 所述第三薄膜晶体 管截止，所述第一发光控制线控制所述第一薄膜晶体管导通，所述第 二发光控制线控制所述第五薄膜晶体管截止，所述第三发光控制线控 制所述第六薄膜晶体管截止， 所述第四薄膜晶体管进入饱和状态； 扫描信号线控制所述第二薄膜晶体管截止， 所述第三薄膜晶体 管导通，所述第一发光控制线控制所述第一薄膜晶体管导通，所述第 二发光控制线控制所述第五薄膜晶体管导通，所述第三发光控制线控 制所述第六薄膜晶体管截止，数据线信号传输给所述存储电容的第一 端；
扫描信号线控制所述第二薄膜晶体管导通， 所述第三薄膜晶体 管截止，所述第一发光控制线控制所述第一薄膜晶体管截止，所述第 二发光控制线控制所述第五薄膜晶体管截止，所述第三发光控制线控 制所述第六薄膜晶体管导通，所述第四薄膜晶体管驱动有机发光二极 管发光。
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