WO2019071724A1 - Amoled显示装置及其驱动方法 - Google Patents

Amoled显示装置及其驱动方法 Download PDF

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Publication number
WO2019071724A1
WO2019071724A1 PCT/CN2017/111966 CN2017111966W WO2019071724A1 WO 2019071724 A1 WO2019071724 A1 WO 2019071724A1 CN 2017111966 W CN2017111966 W CN 2017111966W WO 2019071724 A1 WO2019071724 A1 WO 2019071724A1
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electrically connected
thin film
film transistor
module
voltage
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PCT/CN2017/111966
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English (en)
French (fr)
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王振岭
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深圳市华星光电半导体显示技术有限公司
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Priority to US15/579,520 priority Critical patent/US10424250B2/en
Publication of WO2019071724A1 publication Critical patent/WO2019071724A1/zh

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    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
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    • 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
    • G09G3/3258—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 voltage across the light-emitting element
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    • 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
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    • 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]
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    • 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
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    • 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]
    • G09G3/3266—Details of drivers for scan electrodes
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    • 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]
    • G09G3/3275—Details of drivers for data electrodes
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/805—Electrodes
    • H10K50/81—Anodes
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
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    • H10K50/80—Constructional details
    • H10K50/805—Electrodes
    • H10K50/82—Cathodes
    • H—ELECTRICITY
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    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
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    • H—ELECTRICITY
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Definitions

  • the present invention relates to the field of display technologies, and in particular, to an AMOLED display device and a driving method thereof.
  • OLED Organic Light Emitting Display
  • OLED Organic Light Emitting Display
  • OLED can be divided into two categories: passive driving and active driving, namely direct addressing and Thin Film Transistor (TFT) matrix addressing.
  • TFT Thin Film Transistor
  • the active drive is also called an Active Matrix (AM) type, and each of the light-emitting units in the AMOLED is independently controlled by TFT addressing.
  • a pixel driving circuit composed of a light emitting unit and a TFT addressing circuit needs to be driven by a load negative voltage (OVSS) through a wire.
  • OVSS load negative voltage
  • a conventional AMOLED display device includes: a substrate 10 , a plurality of sub-pixels arranged in an array on the substrate 10 , and a plurality of strips disposed on the substrate 10 .
  • the OVSS traces 20 are arranged in parallel, and each row of sub-pixels is electrically connected to an OVSS trace 20 and the power supply negative voltage OVSS is supplied from the corresponding OVSS trace 20.
  • the power supply negative voltage OVSS is from the edge of the substrate 10. Both ends of the OVSS trace 20 are input to the OVSS trace 20.
  • the negative supply voltage OVSS is transmitted through the OVSS trace 20 due to the IR drop, and is located in the central region of the substrate 10.
  • the power supply negative voltage OVSS received by the sub-pixel is greater than the power supply negative voltage OVSS received by the sub-pixels located at both ends of the substrate 10. Referring to FIG.
  • the sub-pixel of the AMOLED display device shown in FIG. 1 includes the first thin film transistor T100. a second thin film transistor T200, a capacitor C100, and an organic light emitting diode D100.
  • the gate of the first thin film transistor T100 is connected to the scan signal SCAN, the source is connected to the data signal DATA, and the drain is electrically connected to the second thin film transistor T200.
  • a positive power supply voltage of the gate-drain access, the second thin film transistor T200 OVDD, the source is electrically connected to the anode of the organic light emitting diode D100, and the two ends of the capacitor C100 are electrically connected to the gate and the source of the second thin film crystal T200, respectively, and the cathode of the organic light emitting diode D100 is electrically connected to the corresponding OVSS trace 20
  • the power supply negative voltage OVSS is connected.
  • the voltage will have the same voltage rise, which will cause the voltage trace of the driving thin film transistor to be pinched off.
  • the driving thin film transistor needs to be in a saturation region in its characteristic curve when the panel is displayed, so that the current flowing through the driving thin film transistor and the organic light emitting diode D100 is kept stable, and the driving thin film transistor is located in the characteristic curve thereof.
  • the saturation region the voltage difference between the drain and the source is reduced, that is, the voltage value of the positive voltage OVDD of the power supply is lowered, and the driving power consumption of the AMOLED display device can be reduced.
  • the usual method is to set the maximum grayscale value or maximum according to the image to be output.
  • the minimum drain-source voltage difference of the driving thin film transistor corresponding to the data signal voltage value adjusts the power supply positive voltage OVDD, and does not consider the voltage rise of the power supply negative voltage OVSS due to the IR voltage drop, and is easy to adjust the power supply positive voltage OVDD.
  • the driving thin film transistor of the sub-pixel located in the central region of the substrate 10 is in a linear region of its characteristic curve at the time of display, and thus the display screen is uneven.
  • An object of the present invention is to provide an AMOLED display device which has low display power consumption and high display quality.
  • Another object of the present invention is to provide a driving method of an AMOLED display device, which can reduce the display power consumption of the AMOLED display device and improve the display quality of the AMOLED display device.
  • the present invention first provides an AMOLED display device, including an OLED panel, a detection module electrically connected to the OLED panel, a control module electrically connected to the detection module, and a communication module electrically connected to the control module. a storage module electrically connected to the control module, and a voltage output module electrically connected to the control module and the OLED panel;
  • the OLED panel includes: a substrate, a plurality of sub-pixels disposed on the substrate and arranged in an array, and a plurality of rows of OVSS traces disposed on the substrate; each row of sub-pixels is electrically connected to a row of OVSS traces and corresponding to the OVSS
  • the trace provides a negative voltage of the power supply; at least one sub-pixel located in a central area of the substrate is a detection sub-pixel, and the detection sub-pixel is electrically connected to the detection module;
  • the detecting module is configured to acquire a negative voltage of a power supply input to the OVSS trace corresponding to the detection sub-pixel, obtain a maximum value of a negative power supply voltage of the input detection sub-pixel, and transmit the same to the control module; Receiving a display signal and transmitting to a control module, the display signal including a highest grayscale value or a highest data signal voltage in a picture to be displayed, and a frame synchronization signal;
  • the storage module is configured to store a correspondence between a highest grayscale value or a highest data signal voltage, a power negative voltage, and a minimum power positive voltage in a preset screen to be displayed, the correspondence forming a lookup table;
  • the control module is configured to: According to the highest gray scale value or the highest data signal voltage in the screen to be displayed, and the maximum value of the power supply negative voltage of the input detection sub-pixel, the corresponding minimum power supply positive voltage is obtained from the lookup table of the storage module and the corresponding control signal is generated. And transmitting to the voltage output module
  • the detecting sub-pixel includes a first thin film transistor, a second thin film transistor, a third thin film transistor, a first capacitor, and a first organic light emitting diode;
  • the gate of the first thin film transistor is connected to the scan signal, the source is connected to the data signal, and the drain is electrically connected to the gate of the second thin film transistor; the drain of the second thin film transistor is electrically connected to the voltage output module.
  • a positive voltage of the power source the source is electrically connected to the anode of the first organic light emitting diode;
  • the gate of the third thin film transistor is connected to the sensing signal, and the source is electrically connected to the cathode of the first organic light emitting diode, and the drain is electrically a connection detection module;
  • the two ends of the first capacitor are electrically connected to the gate and the drain of the second thin film transistor respectively;
  • the cathode of the first organic light emitting diode is electrically connected to the corresponding OVSS trace;
  • Each of the sub-pixels except the detection sub-pixel includes a fourth thin film transistor, a fifth thin film transistor, a second capacitor, and a second organic light emitting diode;
  • the gate of the fourth thin film transistor is connected to the scan signal, the source is connected to the data signal, and the drain is electrically connected to the gate of the fifth thin film transistor; the drain of the fifth thin film transistor is electrically connected to the voltage output module.
  • a positive voltage of the power source the source is electrically connected to the anode of the second organic light emitting diode; the two ends of the second capacitor are electrically connected to the gate and the drain of the fifth thin film transistor respectively; and the cathode of the second organic light emitting diode
  • the OVSS trace corresponding to the sexual connection.
  • the sensing signal controls the third thin film transistor to be turned on when the detecting module acquires a negative power supply voltage to which the OVSS trace corresponding to the detection sub-pixel is input.
  • the AMOLED display device further includes a source driving chip electrically connected to the communication module and the OLED panel, and the display signal is transmitted from the source driving chip to the communication module.
  • the AMOLED display device further includes a timing controller electrically connected to the communication module, and a source driving chip electrically connected to the timing controller and the OLED panel, wherein the display signal is controlled by a timing controller Transfer to the communication module.
  • the invention also provides a driving method of an AMOLED display device, comprising the following steps:
  • Step S1 providing the above AMOLED display device
  • Step S2 storing, in the storage module, a highest grayscale value in a preset screen to be displayed or Corresponding relationship between the highest data signal voltage, the negative voltage of the power supply, and the positive voltage of the minimum power supply to form a lookup table;
  • Step S3 The detecting module acquires a negative voltage of the power supply to which the OVSS trace corresponding to the sub-pixel is detected, and obtains a maximum value of the negative voltage of the input detecting sub-pixel; the communication module receives the display signal and transmits the signal to the control module;
  • the display signal includes a highest grayscale value or a highest data signal voltage in the picture to be displayed, and a frame synchronization signal;
  • Step S4 The control module obtains a corresponding minimum power supply positive voltage from the lookup table of the storage module according to the highest grayscale value or the highest data signal voltage in the screen to be displayed and the maximum value of the power supply negative voltage of the input detection subpixel. Generating a corresponding control signal to the voltage output module, and updating the control signal according to the frame synchronization signal;
  • Step S5 the voltage output module generates a corresponding power positive voltage output to the OLED panel according to the control signal.
  • the detecting sub-pixel includes a first thin film transistor, a second thin film transistor, a third thin film transistor, a first capacitor, and a first organic light emitting diode;
  • the gate of the first thin film transistor is connected to the scan signal, the source is connected to the data signal, and the drain is electrically connected to the gate of the second thin film transistor; the drain of the second thin film transistor is electrically connected to the voltage output module.
  • a positive voltage of the power source the source is electrically connected to the anode of the first organic light emitting diode;
  • the gate of the third thin film transistor is connected to the sensing signal, and the source is electrically connected to the cathode of the first organic light emitting diode, and the drain is electrically a connection detection module;
  • the two ends of the first capacitor are electrically connected to the gate and the drain of the second thin film transistor respectively;
  • the cathode of the first organic light emitting diode is electrically connected to the corresponding OVSS trace;
  • Each of the sub-pixels except the detection sub-pixel includes a fourth thin film transistor, a fifth thin film transistor, a second capacitor, and a second organic light emitting diode;
  • the gate of the fourth thin film transistor is connected to the scan signal, the source is connected to the data signal, and the drain is electrically connected to the gate of the fifth thin film transistor; the drain of the fifth thin film transistor is electrically connected to the voltage output module.
  • a positive voltage of the power source the source is electrically connected to the anode of the second organic light emitting diode; the two ends of the second capacitor are electrically connected to the gate and the drain of the fifth thin film transistor respectively; and the cathode of the second organic light emitting diode
  • the OVSS trace corresponding to the sexual connection.
  • the sensing signal controls the third thin film transistor to be turned on.
  • the AMOLED display device further includes a source driving chip electrically connected to the communication module and the OLED panel, and the source driving chip transmits a display signal to the communication module in the step S3.
  • the AMOLED display device further includes timing control electrically connected to the communication module And a source driving chip electrically connected to the timing controller and the OLED panel; and the display signal is transmitted by the timing controller to the communication module in the step S3.
  • the present invention also provides an AMOLED display device, comprising an OLED panel, a detection module electrically connected to the OLED panel, a control module electrically connected to the detection module, a communication module electrically connected to the control module, and a control module a storage module and a voltage output module electrically connected to the control module and the OLED panel;
  • the OLED panel includes: a substrate, a plurality of sub-pixels disposed on the substrate and arranged in an array, and a plurality of rows of OVSS traces disposed on the substrate; each row of sub-pixels is electrically connected to a row of OVSS traces and corresponding to the OVSS
  • the trace provides a negative voltage of the power supply; at least one sub-pixel located in a central area of the substrate is a detection sub-pixel, and the detection sub-pixel is electrically connected to the detection module;
  • the detecting module is configured to acquire a negative voltage of a power supply input to the OVSS trace corresponding to the detection sub-pixel, and obtain a maximum value of a negative power supply voltage of the input detection sub-pixel and transmit the same to the control module;
  • the communication module is configured to receive a display signal and transmit to a control module, where the display signal includes a highest grayscale value or a highest data signal voltage in a picture to be displayed, and a frame synchronization signal;
  • the storage module is configured to store a correspondence between a highest grayscale value or a highest data signal voltage, a power negative voltage, and a minimum power positive voltage in a preset screen to be displayed, and the correspondence relationship forms a lookup table;
  • the control module is configured to obtain a corresponding minimum power positive voltage from a lookup table of the storage module according to a highest grayscale value or a highest data signal voltage in the screen to be displayed and a maximum value of a negative power supply voltage of the input detection subpixel And generating a corresponding control signal for transmission to the voltage output module, and for updating the control signal according to the frame synchronization signal;
  • the voltage output module is configured to generate a corresponding power positive voltage output to the OLED panel according to the control signal
  • the detecting sub-pixel includes a first thin film transistor, a second thin film transistor, a third thin film transistor, a first capacitor, and a first organic light emitting diode;
  • the gate of the first thin film transistor is connected to the scan signal, the source is connected to the data signal, and the drain is electrically connected to the gate of the second thin film transistor; the drain of the second thin film transistor is electrically connected to the voltage output module.
  • a positive voltage of the power source the source is electrically connected to the anode of the first organic light emitting diode;
  • the gate of the third thin film transistor is connected to the sensing signal, and the source is electrically connected to the cathode of the first organic light emitting diode, and the drain is electrically a connection detection module;
  • the two ends of the first capacitor are electrically connected to the gate and the drain of the second thin film transistor respectively;
  • the cathode of the first organic light emitting diode is electrically connected to the corresponding OVSS trace;
  • Each of the sub-pixels except the detection sub-pixel includes a fourth thin film transistor, a fifth thin film transistor, a second capacitor, and a second organic light emitting diode;
  • the gate of the fourth thin film transistor is connected to the scan signal, the source is connected to the data signal, and the drain is electrically connected to the gate of the fifth thin film transistor; the drain of the fifth thin film transistor is electrically connected to the voltage output module.
  • a positive voltage of the power source the source is electrically connected to the anode of the second organic light emitting diode; the two ends of the second capacitor are electrically connected to the gate and the drain of the fifth thin film transistor respectively; and the cathode of the second organic light emitting diode
  • the OVSS trace corresponding to the sexual connection;
  • the sensing signal controls the third thin film transistor to be turned on when the detecting module acquires the negative voltage of the power input to the OVSS trace corresponding to the detecting sub-pixel;
  • the device further includes a source driving chip electrically connected to the communication module and the OLED panel, wherein the display signal is transmitted from the source driving chip to the communication module.
  • the present invention provides an AMOLED display device in which an OLED panel has a plurality of sub-pixels, each row of sub-pixels is electrically connected to an OVSS trace, and at least one sub-pixel located in a central region of the substrate is a detector.
  • the detection module obtains the maximum value of the negative voltage of the input detection sub-pixel
  • the communication module receives the highest grayscale value or the highest data signal voltage in the screen to be displayed, and the control module displays the image according to the need.
  • the highest gray scale value or the highest data signal voltage, and the maximum value of the power supply negative voltage input to the detection sub-pixel find the corresponding minimum power supply positive voltage from the lookup table stored in the storage module, and generate corresponding control signal control
  • the voltage output module outputs a corresponding positive voltage of the power supply to the OLED panel, which can reduce the display power consumption of the AMOLED display device and improve the display quality of the AMOLED display device.
  • the driving method of the AMOLED display device provided by the invention can reduce the display power consumption of the AMOLED display device and improve the display quality of the AMOLED display device.
  • FIG. 1 is a schematic structural view of a conventional AMOLED display device
  • FIG. 2 is a circuit diagram of a sub-pixel of the AMOLED display device shown in FIG. 1;
  • FIG. 3 is a schematic structural view of a first embodiment of an AMOLED display device of the present invention.
  • FIG. 4 is a schematic structural view of an OLED panel of an AMOLED display device of the present invention.
  • FIG. 5 is a circuit diagram of a detection sub-pixel of an AMOLED display device of the present invention.
  • FIG. 6 is a circuit diagram of a sub-pixel of an AMOLED display device of the present invention except for detecting sub-pixels;
  • FIG. 7 is a schematic structural view of a second embodiment of an AMOLED display device of the present invention.
  • FIG. 8 is a flowchart of a driving method of an AMOLED display device of the present invention.
  • the present invention provides an AMOLED display device.
  • FIG. 3 it is a schematic structural diagram of a first embodiment of an AMOLED display device according to the present invention.
  • the AMOLED display device of the present invention includes an OLED panel 100 and an electrical connection with the OLED panel 100.
  • the test module 200, the control module 300 electrically connected to the detection module 200, the communication module 400 electrically connected to the control module 300, the storage module 500 electrically connected to the control module 300, and the control module 300 and the OLED panel 100 A voltage output module 600 that is electrically connected.
  • the OLED panel 100 includes a substrate 110, a plurality of sub-pixels 120 disposed on the substrate 110 and arranged in an array, and a plurality of rows of OVSS traces 130 disposed on the substrate 110; each row of sub-pixels 120 is electrically connected to a row of OVSS traces 130 and is provided with a power supply negative voltage OVSS by a corresponding OVSS trace 130; at least one sub-pixel 120 located in a central region of the substrate 110 is a detection sub-pixel 121, and the detection sub-pixel 121
  • the detection module 200 is electrically connected.
  • the detection sub-pixels 121 may also be multiple.
  • the detecting sub-pixel 121 includes a first thin film transistor T1, a second thin film transistor T2, a third thin film transistor T3, a first capacitor C1, and a first organic light emitting diode D1;
  • the gate of the first thin film transistor T1 is connected to the scan signal Scan, the source is connected to the data signal Data, the drain is electrically connected to the gate of the second thin film transistor T2, and the second thin film transistor T2 is a driving thin film transistor.
  • the drain electrical connection voltage output module 600 is connected to the power supply positive voltage OVDD, the source is electrically connected to the anode of the first organic light emitting diode D1; the gate of the third thin film transistor T3 is connected to the sensing signal SEN, the source Electrically connecting the cathode of the first OLED D1, the drain is electrically connected to the detecting module 200; the two ends of the first capacitor C1 are electrically connected to the gate and the drain of the second thin film transistor T2, respectively;
  • the cathode of an organic light emitting diode D1 is electrically connected to the corresponding OVSS trace 130.
  • each sub-pixel 120 except the detection sub-pixel 121 includes a fourth thin film transistor T4, a fifth thin film transistor T5, a second capacitor C2, and a second organic light-emitting diode D2;
  • the gate of the fourth thin film transistor T4 is connected to the scan signal Scan, and the source is connected to the data signal.
  • Data the drain is electrically connected to the gate of the fifth thin film transistor T5;
  • the fifth thin film transistor T5 is a driving thin film transistor, and the drain is electrically connected to the voltage output module 600 to be connected to the power supply positive voltage OVDD, and the source is electrically connected.
  • the detection module 200 is configured to acquire a power supply negative voltage OVSS input to the OVSS trace 130 corresponding to the detection sub-pixel 121, and obtain a maximum value of the power supply negative voltage OVSS of the input detection sub-pixel 121 and transmit the control to the control.
  • Module 300 is configured to acquire a power supply negative voltage OVSS input to the OVSS trace 130 corresponding to the detection sub-pixel 121, and obtain a maximum value of the power supply negative voltage OVSS of the input detection sub-pixel 121 and transmit the control to the control.
  • Module 300 is configured to acquire a power supply negative voltage OVSS input to the OVSS trace 130 corresponding to the detection sub-pixel 121, and obtain a maximum value of the power supply negative voltage OVSS of the input detection sub-pixel 121 and transmit the control to the control. Module 300.
  • the maximum value of the power supply negative voltage OVSS of the input detection sub-pixel 121 is the value of the power supply negative voltage OVSS input to the one detection sub-pixel 121.
  • the detecting module 200 acquires the analog power conversion after detecting the negative power supply voltage OVSS input to the OVSS trace 130 corresponding to the sub-pixel 121, and detects the power of the input sub-pixel 121 in the form of a digital signal.
  • the maximum value of the voltage OVSS is transmitted to the control module 300.
  • the sensing signal SEN controls the third thin film transistor T3 to be turned on.
  • the communication module 400 is configured to receive a display signal and transmit it to the control module 300, where the display signal includes a highest grayscale value or a highest data signal voltage in a picture to be displayed, and a frame synchronization signal.
  • the storage module 500 is configured to store a correspondence between a highest grayscale value or a highest data signal voltage, a power negative voltage OVSS, and a minimum power positive voltage in a preset screen to be displayed, and the correspondence forms a lookup table.
  • the correspondence between the highest grayscale value or the highest data signal voltage, the power supply negative voltage OVSS, and the minimum power supply positive voltage in the preset picture to be displayed is a characteristic curve of the driving thin film transistor passing through the plurality of sub-pixels 120.
  • the minimum power supply positive voltage is such that under a certain gray scale value or the highest data signal voltage and a certain power source negative voltage, the driving thin film transistor in the sub-pixel 120 can be ensured to operate in saturation of its characteristic curve.
  • the control module 300 is configured to obtain a corresponding value from the lookup table of the storage module 500 according to the highest grayscale value or the highest data signal voltage in the screen to be displayed and the maximum value of the power supply negative voltage OVSS of the input detection sub-pixel 121.
  • the minimum power positive voltage and corresponding control signals are transmitted to the voltage output module 600 and used to update the control signals in accordance with the frame synchronization signals.
  • the voltage output module 600 is configured to generate a corresponding positive power supply according to the control signal.
  • the voltage OVDD is output to the OLED panel 100.
  • the AMOLED display device further includes a source driving chip 700 electrically connected to the communication module 400 and the OLED panel 100, and the display signal is It is transmitted from the source driving chip 700 to the communication module 400.
  • FIG. 7 is a second embodiment of the present invention.
  • the embodiment utilizes a timing controller 700 ′ electrically connected to the communication module 400 , and the timing controller 700 ′ and the OLED.
  • the source driver chip 800 ′ that is electrically connected to the panel 100 replaces the source driver 700 that is electrically connected to the communication module 400 and the OLED panel 100 in the first embodiment, and the display signal is transmitted to the communication module by the timing controller 700 ′.
  • 400, the rest are the same as the first embodiment, and details are not described herein again.
  • the AMOLED display device of the present invention has the cathode of the first organic light emitting diode D1 and the corresponding OVSS trace 130 by using at least one sub-pixel 120 in the central region of the substrate 110 as the detection sub-pixel 121.
  • the connection point access detection module 200 obtains the power supply negative voltage OVSS of the input detection sub-pixel 121 by using the detection mode 200, and obtains the maximum value of the power supply negative voltage OVSS of the input detection sub-pixel, and the communication module 400 receives the display required to be displayed.
  • the control module 300 stores the highest grayscale value or the highest data signal voltage in the screen to be displayed, and the maximum value of the power supply negative voltage OVSS of the input detection subpixel.
  • the search table stored in the module 500 searches for a corresponding minimum positive power supply positive voltage that enables the driving thin film transistors of the plurality of sub-pixels 120 to operate in a saturation region of the characteristic curve thereof, and generates a corresponding control signal, and the control voltage output module 600 outputs the corresponding The positive power supply voltage OVDD, that is, the corresponding minimum power supply positive voltage, is applied to the OLED panel 100 to ensure driving of all sub-pixels 120 of the AMOLED.
  • the thin film transistor in the saturation region are characteristic while reducing the driving voltage of each sub-pixel 120, thus ensuring the quality of the display AMOLED display device premise of reducing the power consumption of the display device of an AMOLED display.
  • the present invention further provides a driving method of an AMOLED display device, including the following steps:
  • Step S1 please refer to FIG. 3 or FIG. 7 , and in conjunction with FIG. 4 to FIG. 6 , the above-mentioned AMOLED display device is provided, and the structure of the AMOLED display device is not repeatedly described herein.
  • Step S2 storing, in the storage module 500, a correspondence between the highest grayscale value or the highest data signal voltage, the power negative voltage OVSS, and the minimum power positive voltage in the preset screen to be displayed, to form a lookup table.
  • the correspondence between the highest grayscale value or the highest data signal voltage, the power supply negative voltage OVSS, and the minimum power supply positive voltage in the preset picture to be displayed is a characteristic curve of the driving thin film transistor passing through the plurality of sub-pixels 120. Obtained, the minimum power supply positive voltage is at a certain Under the condition of a highest gray scale value or the highest data signal voltage and a certain power supply negative voltage, it is possible to ensure that the driving thin film transistor in the sub-pixel 120 operates at a power supply positive voltage having a minimum voltage value in a saturation region of its characteristic curve.
  • Step S3 The detection module 200 acquires the power supply negative voltage OVSS input to the OVSS trace 130 corresponding to the detection sub-pixel 121, and obtains the maximum value of the power supply negative voltage OVSS of the input detection sub-pixel 121; the communication module 400 receives the display signal. And transmitted to the control module 300; the display signal includes the highest grayscale value or the highest data signal voltage in the picture to be displayed, and the frame synchronization signal.
  • the AMOLED display device when the AMOLED display device includes the source driving chip 700 electrically connected to the communication module 400 and the OLED panel 100, the source driving chip is in the step S3.
  • the 700 transmits a display signal to the communication module 400.
  • the AMOLED display device when the AMOLED display device includes a timing controller 700' electrically connected to the communication module 400, and a source electrically connected to the timing controller 700' and the OLED panel 100, The driving chip 800' is transmitted; the display signal is transmitted from the timing controller 700' to the communication module 400 in the step S3.
  • the sensing signal SEN controls the third thin film transistor T3 to be turned on. .
  • the detecting module 200 acquires the analog power conversion after detecting the negative power supply voltage OVSS input to the OVSS trace 130 corresponding to the sub-pixel 121, and detects the power of the input sub-pixel 121 in the form of a digital signal.
  • the maximum value of the voltage OVSS is transmitted to the control module 300.
  • Step S4 The control module 300 obtains a corresponding minimum from the lookup table of the storage module 500 according to the highest grayscale value or the highest data signal voltage in the screen to be displayed and the maximum value of the power supply negative voltage OVSS of the input detection subpixel 121.
  • the power supply positive voltage and generates a corresponding control signal is transmitted to the voltage output module 600 while updating the control signal according to the frame synchronization signal.
  • Step S5 the voltage output module 600 generates a corresponding power supply positive voltage OVDD to output to the OLED panel 100 according to the control signal.
  • the access detection module 200 obtains the power supply negative voltage OVSS of the input detection sub-pixel 121 by using the detection mode 200, and obtains the maximum value of the power supply negative voltage OVSS of the input detection sub-pixel, and the communication module 400 receives the picture to be displayed.
  • the control module 300 stores the maximum grayscale value or the highest data signal voltage in the screen to be displayed, and the maximum value of the power supply negative voltage OVSS of the input detection subpixel.
  • the search table stored in the storage module 500 searches for a corresponding minimum positive power supply voltage that enables the driving thin film transistors of the plurality of sub-pixels 120 to operate in a saturation region of the characteristic curve thereof to generate a corresponding control signal, and controls the output of the voltage output module 600.
  • the corresponding positive power supply voltage OVDD that is, the corresponding minimum positive power supply positive voltage
  • OVDD the corresponding minimum positive power supply positive voltage
  • the OLED panel of the present invention has a plurality of sub-pixels, each row of sub-pixels is electrically connected to an OVSS trace, and at least one sub-pixel located in a central region of the substrate is a detection sub-pixel.
  • the detection module obtains the maximum value of the power supply negative voltage of the input detection sub-pixel
  • the communication module receives the highest gray level value or the highest data signal voltage in the picture to be displayed
  • the control module displays the highest gray level in the picture according to the need.
  • the value or the highest data signal voltage, and the maximum value of the power supply negative voltage input to the detection sub-pixel find the corresponding minimum power supply positive voltage from the look-up table stored in the storage module, and generate a corresponding control signal to control the voltage output module output.
  • Corresponding positive voltage of the power supply to the OLED panel can reduce the display power consumption of the AMOLED display device and improve the display quality of the AMOLED display device.
  • the driving method of the AMOLED display device of the present invention can reduce the display power consumption of the AMOLED display device and improve the display quality of the AMOLED display device.

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Abstract

本发明提供一种AMOLED显示装置及其驱动方法。本发明的AMOLED显示装置的OLED面板具有多个子像素，每一行子像素对应电性连接一OVSS走线，至少一个位于基板中心区域的子像素为侦测子像素，驱动时，利用侦测模块得到输入侦测子像素的电源负电压的最大值，通信模块接收需要显示的画面中的最高灰阶值或最高数据信号电压，控制模块根据需要显示的画面中的最高灰阶值或最高数据信号电压、以及输入侦测子像素的电源负电压的最大值，从存储模块中存储的查找表中查找得到对应的最小电源正电压，并产生对应的控制信号控制电压输出模块输出对应的电源正电压至OLED面板，能够降低AMOLED显示装置的显示功耗，同时提升AMOLED显示装置的显示品质。

Description

AMOLED显示装置及其驱动方法 技术领域
本发明涉及显示技术领域，尤其涉及一种AMOLED显示装置及其驱动方法。
背景技术
有机发光二极管(Organic Light Emitting Display，OLED)显示装置具有自发光、驱动电压低、发光效率高、响应时间短、清晰度与对比度高、近180°视角、使用温度范围宽，可实现柔性显示与大面积全色显示等诸多优点，被业界公认为是最有发展潜力的显示装置。
OLED按照驱动方式可以分为无源驱动和有源驱动两大类，即直接寻址和薄膜晶体管(Thin Film Transistor，TFT)矩阵寻址两类。其中，有源驱动也称为有源矩阵(Active Matrix，AM)型，AMOLED中的每个发光单元都由TFT寻址独立控制。发光单元和TFT寻址电路组成的像素驱动电路需要通过导线对其加载电源负电压(OVSS)进行驱动。
随着时代及技术的进步，大尺寸、高分辨率的AMOLED显示装置逐渐发展起来，相应的，大尺寸AMOLED显示装置也需要较大尺寸的面板及较多数量的像素，面板导线长度将越来越长，导线电阻也越大。不可避免的，电源负电压会在导线上产生IR压降(IR Drop)，导线的电阻值使得每一个像素驱动电路获得的电源负电压不同。具体地，请参阅图1，现有的一种AMOLED显示装置包括：基板10、设于所述基板10上的呈阵列式排布的多个子像素、以及设于所述基板上10的多条平行间隔排列的OVSS走线20，每一行子像素对应电性连接一条OVSS走线20并由对应的OVSS走线20提供电源负电压OVSS，所述电源负电压OVSS从位于基板10边缘的所述OVSS走线20的两端输入到所述OVSS走线20中，当AMOLED显示装置正常显示时，由于IR压降的影响，电源负电压OVSS经OVSS走线20传输后，位于基板10中心区域的子像素接收到的电源负电压OVSS要大于位于基板10两端位置的子像素接收到的电源负电压OVSS，请参阅图2，图1所示的AMOLED显示装置的子像素包括第一薄膜晶体管T100、第二薄膜晶体管T200、电容C100、及有机发光二极管D100，第一薄膜晶体管T100的栅极接入扫描信号SCAN，源极接入数据信号DATA，漏极电性连接第二薄膜晶体管T200的栅极，第二薄膜晶体管T200的漏极接入电源正电压 OVDD，源极电性连接有机发光二极管D100的阳极，电容C100的两端分别电性连接第二薄膜晶体T200的栅极及源极，有机发光二极管D100的阴极电性连接对应的OVSS走线20接入电源负电压OVSS，当位于基板10中心区域的子像素接收到由于IR压降被抬升的电源负电压OVSS后，由于电容的耦合效应，作为驱动薄膜晶体管的第二薄膜晶体管T200栅极的电压会有相同的电压抬升，使驱动薄膜晶体管的欲夹断点电压轨迹出现偏移。现有技术中，驱动薄膜晶体管在面板显示时需要处于其特性曲线中的饱和区，以使流过驱动薄膜晶体管及有机发光二极管D100的电流保持稳定，在使驱动薄膜晶体管位于其特性曲线中的饱和区的前提下降低其漏源极电压差，也即降低电源正电压OVDD的电压值，能够降低AMOLED显示装置的驱动功耗，通常的做法为，根据待输出画面中最大灰阶值或最大数据信号电压值所对应的驱动薄膜晶体管的最小漏源极电压差来调整电源正电压OVDD，并没有考虑由于IR压降导致的电源负电压OVSS的电压抬升，则在调整电源正电压OVDD时容易使位于基板10中心区域的子像素的驱动薄膜晶体管在显示时处于其特性曲线的线性区，进而出现显示画面不均匀的现象。
发明内容
本发明的目的在于提供一种AMOLED显示装置，具有较低的显示功耗，且显示品质高。
本发明的另一目的在于提供一种AMOLED显示装置的驱动方法，能够降低AMOLED显示装置的显示功耗，提升AMOLED显示装置的显示品质。
为实现上述目的，本发明首先提供一种AMOLED显示装置，包括OLED面板、与OLED面板电性连接的侦测模块、与侦测模块电性连接的控制模块、与控制模块电性连接的通信模块、与控制模块电性连接的存储模块、及与控制模块及OLED面板均电性连接的电压输出模块；
所述OLED面板包括：基板、设于基板上且阵列排布的多个子像素、及设于基板上的多行OVSS走线；每一行子像素对应电性连接一行OVSS走线并由对应的OVSS走线提供电源负电压；至少一个位于基板的中心区域的子像素为侦测子像素，所述侦测子像素与侦测模块电性连接；
所述侦测模块用于获取侦测子像素对应的OVSS走线向其输入的电源负电压，得到输入侦测子像素的电源负电压的最大值并传输至控制模块；所述通信模块用于接收显示信号并传输至控制模块，该显示信号包括需要显示的画面中的最高灰阶值或最高数据信号电压、以及帧同步信号；所述 存储模块用于存储预设的需要显示的画面中的最高灰阶值或最高数据信号电压、电源负电压、以及最小电源正电压的对应关系，该对应关系形成查找表；所述控制模块用于根据需要显示的画面中的最高灰阶值或最高数据信号电压、及输入侦测子像素的电源负电压的最大值，从存储模块的查找表得到对应的最小电源正电压并产生对应的控制信号传输至电压输出模块，并用于根据帧同步信号更新所述控制信号；所述电压输出模块用于根据控制信号产生对应的电源正电压输出至OLED面板。
所述侦测子像素包括第一薄膜晶体管、第二薄膜晶体管、第三薄膜晶体管、第一电容、及第一有机发光二极管；
所述第一薄膜晶体管的栅极接入扫描信号，源极接入数据信号，漏极电性连接第二薄膜晶体管的栅极；所述第二薄膜晶体管的漏极电性连接电压输出模块接入电源正电压，源极电性连接第一有机发光二极管的阳极；所述第三薄膜晶体管的栅极接入感测信号，源极电性连接第一有机发光二极管的阴极，漏极电性连接侦测模块；所述第一电容的两端分别电性连接第二薄膜晶体管的栅极和漏极；所述第一有机发光二极管的阴极电性连接对应的OVSS走线；
除侦测子像素外的每一子像素均包括第四薄膜晶体管、第五薄膜晶体管、第二电容、及第二有机发光二极管；
所述第四薄膜晶体管的栅极接入扫描信号，源极接入数据信号，漏极电性连接第五薄膜晶体管的栅极；所述第五薄膜晶体管的漏极电性连接电压输出模块接入电源正电压，源极电性连接第二有机发光二极管阳极；所述第二电容的两端分别电性连接第五薄膜晶体管的栅极和漏极；所述第二有机发光二极管的阴极电性连接对应的OVSS走线。
在侦测模块获取侦测子像素对应的OVSS走线向其输入的电源负电压时，所述感测信号控制第三薄膜晶体管导通。
可选地，所述AMOLED显示装置还包括与所述通信模块及OLED面板均电性连接的源极驱动芯片，所述显示信号由源极驱动芯片传输至通信模块。
可选地，所述AMOLED显示装置还包括与所述通信模块电性连接的时序控制器、及与时序控制器及OLED面板均电性连接的源极驱动芯片，所述显示信号由时序控制器传输至通信模块。
本发明还提供一种AMOLED显示装置的驱动方法，包括如下步骤：
步骤S1、提供上述的AMOLED显示装置；
步骤S2、在存储模块中存储预设的需要显示的画面中的最高灰阶值或 最高数据信号电压、电源负电压、以及最小电源正电压的对应关系，形成查找表；
步骤S3、侦测模块获取侦测子像素对应的OVSS走线向其输入的电源负电压，得到输入侦测子像素的电源负电压的最大值；通信模块接收显示信号并传输至控制模块；该显示信号包括需要显示的画面中的最高灰阶值或最高数据信号电压、以及帧同步信号；
步骤S4、控制模块根据需要显示的画面中的最高灰阶值或最高数据信号电压、及输入侦测子像素的电源负电压的最大值，从存储模块的查找表得到对应的最小电源正电压并产生对应的控制信号传输至电压输出模块，同时根据帧同步信号更新所述控制信号；
步骤S5、电压输出模块根据控制信号产生对应的电源正电压输出至OLED面板。
所述侦测子像素包括第一薄膜晶体管、第二薄膜晶体管、第三薄膜晶体管、第一电容、及第一有机发光二极管；
所述第一薄膜晶体管的栅极接入扫描信号，源极接入数据信号，漏极电性连接第二薄膜晶体管的栅极；所述第二薄膜晶体管的漏极电性连接电压输出模块接入电源正电压，源极电性连接第一有机发光二极管的阳极；所述第三薄膜晶体管的栅极接入感测信号，源极电性连接第一有机发光二极管的阴极，漏极电性连接侦测模块；所述第一电容的两端分别电性连接第二薄膜晶体管的栅极和漏极；所述第一有机发光二极管的阴极电性连接对应的OVSS走线；
除侦测子像素外的每一子像素均包括第四薄膜晶体管、第五薄膜晶体管、第二电容、及第二有机发光二极管；
所述第四薄膜晶体管的栅极接入扫描信号，源极接入数据信号，漏极电性连接第五薄膜晶体管的栅极；所述第五薄膜晶体管的漏极电性连接电压输出模块接入电源正电压，源极电性连接第二有机发光二极管阳极；所述第二电容的两端分别电性连接第五薄膜晶体管的栅极和漏极；所述第二有机发光二极管的阴极电性连接对应的OVSS走线。
所述步骤S3中，在侦测模块获取侦测子像素对应的OVSS走线向其输入的电源负电压时，所述感测信号控制第三薄膜晶体管导通。
所述AMOLED显示装置还包括与所述通信模块及OLED面板均电性连接的源极驱动芯片，所述步骤S3中由所述源极驱动芯片向通信模块传输显示信号。
所述AMOLED显示装置还包括与所述通信模块电性连接的时序控制 器、及与时序控制器及OLED面板均电性连接的源极驱动芯片；所述步骤S3中由所述时序控制器向通信模块传输显示信号。
本发明还提供一种AMOLED显示装置，包括OLED面板、与OLED面板电性连接的侦测模块、与侦测模块电性连接的控制模块、与控制模块电性连接的通信模块、与控制模块电性连接的存储模块、及与控制模块及OLED面板均电性连接的电压输出模块；
所述OLED面板包括：基板、设于基板上且阵列排布的多个子像素、及设于基板上的多行OVSS走线；每一行子像素对应电性连接一行OVSS走线并由对应的OVSS走线提供电源负电压；至少一个位于基板的中心区域的子像素为侦测子像素，所述侦测子像素与侦测模块电性连接；
所述侦测模块用于获取侦测子像素对应的OVSS走线向其输入的电源负电压，得到输入侦测子像素的电源负电压的最大值并传输至控制模块；
所述通信模块用于接收显示信号并传输至控制模块，该显示信号包括需要显示的画面中的最高灰阶值或最高数据信号电压、以及帧同步信号；
所述存储模块用于存储预设的需要显示的画面中的最高灰阶值或最高数据信号电压、电源负电压、以及最小电源正电压的对应关系，该对应关系形成查找表；
所述控制模块用于根据需要显示的画面中的最高灰阶值或最高数据信号电压、及输入侦测子像素的电源负电压的最大值，从存储模块的查找表得到对应的最小电源正电压并产生对应的控制信号传输至电压输出模块，并用于根据帧同步信号更新所述控制信号；
所述电压输出模块用于根据控制信号产生对应的电源正电压输出至OLED面板；
其中，所述侦测子像素包括第一薄膜晶体管、第二薄膜晶体管、第三薄膜晶体管、第一电容、及第一有机发光二极管；
所述第一薄膜晶体管的栅极接入扫描信号，源极接入数据信号，漏极电性连接第二薄膜晶体管的栅极；所述第二薄膜晶体管的漏极电性连接电压输出模块接入电源正电压，源极电性连接第一有机发光二极管的阳极；所述第三薄膜晶体管的栅极接入感测信号，源极电性连接第一有机发光二极管的阴极，漏极电性连接侦测模块；所述第一电容的两端分别电性连接第二薄膜晶体管的栅极和漏极；所述第一有机发光二极管的阴极电性连接对应的OVSS走线；
除侦测子像素外的每一子像素均包括第四薄膜晶体管、第五薄膜晶体管、第二电容、及第二有机发光二极管；
所述第四薄膜晶体管的栅极接入扫描信号，源极接入数据信号，漏极电性连接第五薄膜晶体管的栅极；所述第五薄膜晶体管的漏极电性连接电压输出模块接入电源正电压，源极电性连接第二有机发光二极管阳极；所述第二电容的两端分别电性连接第五薄膜晶体管的栅极和漏极；所述第二有机发光二极管的阴极电性连接对应的OVSS走线；
其中，在侦测模块获取侦测子像素对应的OVSS走线向其输入的电源负电压时，所述感测信号控制第三薄膜晶体管导通；
还包括与所述通信模块及OLED面板均电性连接的源极驱动芯片，所述显示信号由源极驱动芯片传输至通信模块。
本发明的有益效果：本发明提供的一种AMOLED显示装置，其OLED面板具有多个子像素，每一行子像素对应电性连接一OVSS走线，至少一个位于基板中心区域的子像素为侦测子像素，驱动时，利用侦测模块得到输入侦测子像素的电源负电压的最大值，通信模块接收需要显示的画面中的最高灰阶值或最高数据信号电压，控制模块根据需要显示的画面中的最高灰阶值或最高数据信号电压、以及输入侦测子像素的电源负电压的最大值，从存储模块中存储的查找表中查找得到对应的最小电源正电压，并产生对应的控制信号控制电压输出模块输出对应的电源正电压至OLED面板，能够降低AMOLED显示装置的显示功耗，同时提升AMOLED显示装置的显示品质。本发明提供的一种AMOLED显示装置的驱动方法，能够降低AMOLED显示装置的显示功耗，同时提升AMOLED显示装置的显示品质。
附图说明
为了能更进一步了解本发明的特征以及技术内容，请参阅以下有关本发明的详细说明与附图，然而附图仅提供参考与说明用，并非用来对本发明加以限制。
附图中，
图1为现有的一种AMOLED显示装置的结构示意图；
图2为图1所示的AMOLED显示装置的一子像素的电路图；
图3为本发明的AMOLED显示装置的第一实施例的结构示意图；
图4为本发明的AMOLED显示装置的OLED面板的结构示意图；
图5为本发明的AMOLED显示装置的侦测子像素的电路图；
图6为本发明的AMOLED显示装置的除侦测子像素外的子像素的电路图；
图7为本发明的AMOLED显示装置的第二实施例的结构示意图；
图8为本发明的AMOLED显示装置的驱动方法的流程图。
具体实施方式
为更进一步阐述本发明所采取的技术手段及其效果，以下结合本发明的优选实施例及其附图进行详细描述。
本发明提供一种AMOLED显示装置，请参阅图3，为本发明的AMOLED显示装置的第一实施例的结构示意图，本发明的AMOLED显示装置包括OLED面板100、与OLED面板100电性连接的侦测模块200、与侦测模块200电性连接的控制模块300、与控制模块300电性连接的通信模块400、与控制模块300电性连接的存储模块500、及与控制模块300及OLED面板100均电性连接的电压输出模块600。
其中，请参阅图4，所述OLED面板100包括：基板110、设于基板110上且阵列排布的多个子像素120、及设于基板上110的多行OVSS走线130；每一行子像素120对应电性连接一行OVSS走线130并由对应的OVSS走线130提供电源负电压OVSS；至少一个位于基板110的中心区域的子像素120为侦测子像素121，所述侦测子像素121与侦测模块200电性连接。
具体地，在本发明的第一实施例中，侦测子像素121仅有一个，其位于最靠近基板110中心的OVSS走线130的中点。当然，在本发明的其他实施例中，所述侦测子像素121也可为多个。
具体地，请参阅图5，所述侦测子像素121包括第一薄膜晶体管T1、第二薄膜晶体管T2、第三薄膜晶体管T3、第一电容C1、及第一有机发光二极管D1；
所述第一薄膜晶体管T1的栅极接入扫描信号Scan，源极接入数据信号Data，漏极电性连接第二薄膜晶体管T2的栅极；所述第二薄膜晶体管T2为驱动薄膜晶体管，其漏极电性连接电压输出模块600接入电源正电压OVDD，源极电性连接第一有机发光二极管D1的阳极；所述第三薄膜晶体管T3的栅极接入感测信号SEN，源极电性连接第一有机发光二极管D1的阴极，漏极电性连接侦测模块200；所述第一电容C1的两端分别电性连接第二薄膜晶体管T2的栅极和漏极；所述第一有机发光二极管D1的阴极电性连接对应的OVSS走线130。
具体地，请参阅图6，除侦测子像素121外的每一子像素120均包括第四薄膜晶体管T4、第五薄膜晶体管T5、第二电容C2、及第二有机发光二极管D2；
所述第四薄膜晶体管T4的栅极接入扫描信号Scan，源极接入数据信号 Data，漏极电性连接第五薄膜晶体管T5的栅极；所述第五薄膜晶体管T5为驱动薄膜晶体管，其漏极电性连接电压输出模块600接入电源正电压OVDD，源极电性连接第二有机发光二极管D2阳极；所述第二电容C2的两端分别电性连接第五薄膜晶体管T5的栅极和漏极；所述第二有机发光二极管D2的阴极电性连接对应的OVSS走线130。
其中，所述侦测模块200用于获取侦测子像素121对应的OVSS走线130向其输入的电源负电压OVSS，得到输入侦测子像素121的电源负电压OVSS的最大值并传输至控制模块300。
进一步地，当侦测子像素121为一个时，输入侦测子像素121的电源负电压OVSS的最大值即为输入该一个侦测子像素121的电源负电压OVSS的值。
具体地，所述侦测模块200获取了侦测子像素121对应的OVSS走线130向其输入的电源负电压OVSS之后进行模数转换，将数字信号形式的输入侦测子像素121的电源负电压OVSS的最大值传输至控制模块300。
具体地，在侦测模块200获取侦测子像素121对应的OVSS走线130向其输入的电源负电压OVSS时，所述感测信号SEN控制第三薄膜晶体管T3导通。
其中，所述通信模块400用于接收显示信号并传输至控制模块300，该显示信号包括需要显示的画面中的最高灰阶值或最高数据信号电压、以及帧同步信号。
其中，所述存储模块500用于存储预设的需要显示的画面中的最高灰阶值或最高数据信号电压、电源负电压OVSS、以及最小电源正电压的对应关系，该对应关系形成查找表。
具体地，所述预设的需要显示的画面中的最高灰阶值或最高数据信号电压、电源负电压OVSS、以及最小电源正电压的对应关系是通过多个子像素120的驱动薄膜晶体管的特性曲线得到的，所述最小电源正电压为在某一最高灰阶值或最高数据信号电压、以及某一电源负电压的条件下，能够保证子像素120中的驱动薄膜晶体管工作在其特性曲线的饱和区的电压值最小的电源正电压。
其中，控制模块300用于根据需要显示的画面中的最高灰阶值或最高数据信号电压、及输入侦测子像素121的电源负电压OVSS的最大值，从存储模块500的查找表得到对应的最小电源正电压并产生对应的控制信号传输至电压输出模块600，并用于根据帧同步信号更新所述控制信号。
其中，所述电压输出模块600用于根据控制信号产生对应的电源正电 压OVDD输出至OLED面板100。
具体地，请参阅图3，在本发明的第一实施例中，所述AMOLED显示装置还包括与所述通信模块400及OLED面板100均电性连接的源极驱动芯片700，所述显示信号由源极驱动芯片700传输至通信模块400。
请参阅图7，为本发明的第二实施例，与第一实施例的区别在于，该实施例利用与通信模块400电性连接的时序控制器700’、及与时序控制器700’及OLED面板100均电性连接的源极驱动芯片800’替换第一实施中同时与通信模块400及OLED面板100电性连接的源极驱动器700，所述显示信号由时序控制器700’传输至通信模块400，其余均与第一实施例相同，在此不再赘述。
需要说明的是，本发明的AMOLED显示装置，通过将基板110中心区域的至少一个子像素120设为侦测子像素121，将其有第一有机发光二极管D1的阴极与对应的OVSS走线130的交接点接入侦测模块200，利用侦测模200获取输入侦测子像素121的电源负电压OVSS，得到输入侦测子像素的电源负电压OVSS的最大值，通信模块400接收需要显示的画面中的最高灰阶值或最高数据信号电压，控制模块300根据需要显示的画面中的最高灰阶值或最高数据信号电压、以及输入侦测子像素的电源负电压OVSS的最大值，从存储模块500中存储的查找表中查找得到对应的能够使多个子像素120的驱动薄膜晶体管工作于其特性曲线的饱和区中的最小电源正电压而产生对应的控制信号，控制电压输出模块600输出对应的电源正电压OVDD也即对应的最小电源正电压至OLED面板100，保证AMOLED所有子像素120中的驱动薄膜晶体管均工作在特性曲线的饱和区的同时，降低了各个子像素120的驱动电压，从而在保证AMOLED显示装置的显示品质的前提下，降低了AMOLED显示装置的显示功耗。
请参阅图8，基于同一发明构思，本发明还提供一种AMOLED显示装置的驱动方法，包括如下步骤：
步骤S1、请参阅图3或图7，并结合图4至图6，提供上述的AMOLED显示装置，在此不再对AMOLED显示装置的结构做重复性描述。
步骤S2、在存储模块500中存储预设的需要显示的画面中的最高灰阶值或最高数据信号电压、电源负电压OVSS、以及最小电源正电压的对应关系，形成查找表。
具体地，所述预设的需要显示的画面中的最高灰阶值或最高数据信号电压、电源负电压OVSS、以及最小电源正电压的对应关系是通过多个子像素120的驱动薄膜晶体管的特性曲线得到的，所述最小电源正电压为在某 一最高灰阶值或最高数据信号电压、以及某一电源负电压的条件下，能够保证子像素120中的驱动薄膜晶体管工作在其特性曲线的饱和区的电压值最小的电源正电压。
步骤S3、侦测模块200获取侦测子像素121对应的OVSS走线130向其输入的电源负电压OVSS，得到输入侦测子像素121的电源负电压OVSS的最大值；通信模块400接收显示信号并传输至控制模块300；该显示信号包括需要显示的画面中的最高灰阶值或最高数据信号电压、以及帧同步信号。
可选地，请参阅图3，当所述AMOLED显示装置包括与所述通信模块400及OLED面板100均电性连接的源极驱动芯片700时，所述步骤S3中由所述源极驱动芯片700向通信模块400传输显示信号。
可选地，请参阅图7，当所述AMOLED显示装置包括与所述通信模块400电性连接的时序控制器700’、及与时序控制器700’及OLED面板100均电性连接的源极驱动芯片800’；所述步骤S3中由所述时序控制器700’向通信模块400传输显示信号。
具体地，所述步骤S3中，在侦测模块200获取侦测子像素121对应的OVSS走线130向其输入的电源负电压OVSS时，所述感测信号SEN控制第三薄膜晶体管T3导通。
具体地，所述侦测模块200获取了侦测子像素121对应的OVSS走线130向其输入的电源负电压OVSS之后进行模数转换，将数字信号形式的输入侦测子像素121的电源负电压OVSS的最大值传输至控制模块300。
步骤S4、控制模块300根据需要显示的画面中的最高灰阶值或最高数据信号电压、及输入侦测子像素121的电源负电压OVSS的最大值，从存储模块500的查找表得到对应的最小电源正电压并产生对应的控制信号传输至电压输出模块600，同时根据帧同步信号更新所述控制信号。
步骤S5、电压输出模块600根据控制信号产生对应的电源正电压OVDD输出至OLED面板100。
需要说明的是，本发明中，通过将基板110中心区域的至少一个子像素120设为侦测子像素121，将其有第一有机发光二极管D1的阴极与对应的OVSS走线130的交接点接入侦测模块200，利用侦测模200获取输入侦测子像素121的电源负电压OVSS，得到输入侦测子像素的电源负电压OVSS的最大值，通信模块400接收需要显示的画面中的最高灰阶值或最高数据信号电压，控制模块300根据需要显示的画面中的最高灰阶值或最高数据信号电压、以及输入侦测子像素的电源负电压OVSS的最大值，从存 储模块500中存储的查找表中查找得到对应的能够使多个子像素120的驱动薄膜晶体管工作于其特性曲线的饱和区中的最小电源正电压而产生对应的控制信号，控制电压输出模块600输出对应的电源正电压OVDD也即对应的最小电源正电压至OLED面板100，保证AMOLED所有子像素120中的驱动薄膜晶体管均工作在特性曲线的饱和区的同时，降低了各个子像素120的驱动电压，从而在保证AMOLED显示装置的显示品质的前提下，降低了AMOLED显示装置的显示功耗。
综上所述，本发明的AMOLED显示装置，其OLED面板具有多个子像素，每一行子像素对应电性连接一OVSS走线，至少一个位于基板中心区域的子像素为侦测子像素，驱动时，利用侦测模块得到输入侦测子像素的电源负电压的最大值，通信模块接收需要显示的画面中的最高灰阶值或最高数据信号电压，控制模块根据需要显示的画面中的最高灰阶值或最高数据信号电压、以及输入侦测子像素的电源负电压的最大值，从存储模块中存储的查找表中查找得到对应的最小电源正电压，并产生对应的控制信号控制电压输出模块输出对应的电源正电压至OLED面板，能够降低AMOLED显示装置的显示功耗，同时提升AMOLED显示装置的显示品质。本发明的AMOLED显示装置的驱动方法，能够降低AMOLED显示装置的显示功耗，同时提升AMOLED显示装置的显示品质。
以上所述，对于本领域的普通技术人员来说，可以根据本发明的技术方案和技术构思作出其他各种相应的改变和变形，而所有这些改变和变形都应属于本发明权利要求的保护范围。

Claims (11)

  1. 一种AMOLED显示装置，包括OLED面板、与OLED面板电性连接的侦测模块、与侦测模块电性连接的控制模块、与控制模块电性连接的通信模块、与控制模块电性连接的存储模块、及与控制模块及OLED面板均电性连接的电压输出模块；
    所述OLED面板包括：基板、设于基板上且阵列排布的多个子像素、及设于基板上的多行OVSS走线；每一行子像素对应电性连接一行OVSS走线并由对应的OVSS走线提供电源负电压；至少一个位于基板的中心区域的子像素为侦测子像素，所述侦测子像素与侦测模块电性连接；
    所述侦测模块用于获取侦测子像素对应的OVSS走线向其输入的电源负电压，得到输入侦测子像素的电源负电压的最大值并传输至控制模块；
    所述通信模块用于接收显示信号并传输至控制模块，该显示信号包括需要显示的画面中的最高灰阶值或最高数据信号电压、以及帧同步信号；
    所述存储模块用于存储预设的需要显示的画面中的最高灰阶值或最高数据信号电压、电源负电压、以及最小电源正电压的对应关系，该对应关系形成查找表；
    所述控制模块用于根据需要显示的画面中的最高灰阶值或最高数据信号电压、及输入侦测子像素的电源负电压的最大值，从存储模块的查找表得到对应的最小电源正电压并产生对应的控制信号传输至电压输出模块，并用于根据帧同步信号更新所述控制信号；
    所述电压输出模块用于根据控制信号产生对应的电源正电压输出至OLED面板。
  2. 如权利要求1所述的AMOLED显示装置，其中，所述侦测子像素包括第一薄膜晶体管、第二薄膜晶体管、第三薄膜晶体管、第一电容、及第一有机发光二极管；
    所述第一薄膜晶体管的栅极接入扫描信号，源极接入数据信号，漏极电性连接第二薄膜晶体管的栅极；所述第二薄膜晶体管的漏极电性连接电压输出模块接入电源正电压，源极电性连接第一有机发光二极管的阳极；所述第三薄膜晶体管的栅极接入感测信号，源极电性连接第一有机发光二极管的阴极，漏极电性连接侦测模块；所述第一电容的两端分别电性连接第二薄膜晶体管的栅极和漏极；所述第一有机发光二极管的阴极电性连接对应的OVSS走线；
    除侦测子像素外的每一子像素均包括第四薄膜晶体管、第五薄膜晶体管、第二电容、及第二有机发光二极管；
    所述第四薄膜晶体管的栅极接入扫描信号，源极接入数据信号，漏极电性连接第五薄膜晶体管的栅极；所述第五薄膜晶体管的漏极电性连接电压输出模块接入电源正电压，源极电性连接第二有机发光二极管阳极；所述第二电容的两端分别电性连接第五薄膜晶体管的栅极和漏极；所述第二有机发光二极管的阴极电性连接对应的OVSS走线。
  3. 如权利要求2所述的AMOLED显示装置，其中，在侦测模块获取侦测子像素对应的OVSS走线向其输入的电源负电压时，所述感测信号控制第三薄膜晶体管导通。
  4. 如权利要求1所述的AMOLED显示装置，还包括与所述通信模块及OLED面板均电性连接的源极驱动芯片，所述显示信号由源极驱动芯片传输至通信模块。
  5. 如权利要求1所述的AMOLED显示装置，还包括与所述通信模块电性连接的时序控制器、及与时序控制器及OLED面板均电性连接的源极驱动芯片，所述显示信号由时序控制器传输至通信模块。
  6. 一种AMOLED显示装置的驱动方法，包括如下步骤：
    步骤S1、提供如权利要求1所述的AMOLED显示装置；
    步骤S2、在存储模块中存储预设的需要显示的画面中的最高灰阶值或最高数据信号电压、电源负电压、以及最小电源正电压的对应关系，形成查找表；
    步骤S3、侦测模块获取侦测子像素对应的OVSS走线向其输入的电源负电压，得到输入侦测子像素的电源负电压的最大值；通信模块接收显示信号并传输至控制模块；该显示信号包括需要显示的画面中的最高灰阶值或最高数据信号电压、以及帧同步信号；
    步骤S4、控制模块根据需要显示的画面中的最高灰阶值或最高数据信号电压、及输入侦测子像素的电源负电压的最大值，从存储模块的查找表得到对应的最小电源正电压并产生对应的控制信号传输至电压输出模块，同时根据帧同步信号更新所述控制信号；
    步骤S5、电压输出模块根据控制信号产生对应的电源正电压输出至OLED面板。
  7. 如权利要求6所述的AMOLED显示装置的驱动方法，其中，所述侦测子像素包括第一薄膜晶体管、第二薄膜晶体管、第三薄膜晶体管、第一电容、及第一有机发光二极管；
    所述第一薄膜晶体管的栅极接入扫描信号，源极接入数据信号，漏极电性连接第二薄膜晶体管的栅极；所述第二薄膜晶体管的漏极电性连接电压输出模块接入电源正电压，源极电性连接第一有机发光二极管的阳极；所述第三薄膜晶体管的栅极接入感测信号，源极电性连接第一有机发光二极管的阴极，漏极电性连接侦测模块；所述第一电容的两端分别电性连接第二薄膜晶体管的栅极和漏极；所述第一有机发光二极管的阴极电性连接对应的OVSS走线；
    除侦测子像素外的每一子像素均包括第四薄膜晶体管、第五薄膜晶体管、第二电容、及第二有机发光二极管；
    所述第四薄膜晶体管的栅极接入扫描信号，源极接入数据信号，漏极电性连接第五薄膜晶体管的栅极；所述第五薄膜晶体管的漏极电性连接电压输出模块接入电源正电压，源极电性连接第二有机发光二极管阳极；所述第二电容的两端分别电性连接第五薄膜晶体管的栅极和漏极；所述第二有机发光二极管的阴极电性连接对应的OVSS走线。
  8. 如权利要求7所述的AMOLED显示装置的驱动方法，其中，所述步骤S3中，在侦测模块获取侦测子像素对应的OVSS走线向其输入的电源负电压时，所述感测信号控制第三薄膜晶体管导通。
  9. 如权利要求6所述的AMOLED显示装置的驱动方法，其中，所述AMOLED显示装置还包括与所述通信模块及OLED面板均电性连接的源极驱动芯片，所述步骤S3中由所述源极驱动芯片向通信模块传输显示信号。
  10. 如权利要求6所述的AMOLED显示装置的驱动方法，其中，所述AMOLED显示装置还包括与所述通信模块电性连接的时序控制器、及与时序控制器及OLED面板均电性连接的源极驱动芯片；所述步骤S3中由所述时序控制器向通信模块传输显示信号。
  11. 一种AMOLED显示装置，包括OLED面板、与OLED面板电性连接的侦测模块、与侦测模块电性连接的控制模块、与控制模块电性连接的通信模块、与控制模块电性连接的存储模块、及与控制模块及OLED面板均电性连接的电压输出模块；
    所述OLED面板包括：基板、设于基板上且阵列排布的多个子像素、及设于基板上的多行OVSS走线；每一行子像素对应电性连接一行OVSS走线并由对应的OVSS走线提供电源负电压；至少一个位于基板的中心区域的子像素为侦测子像素，所述侦测子像素与侦测模块电性连接；
    所述侦测模块用于获取侦测子像素对应的OVSS走线向其输入的电源负电压，得到输入侦测子像素的电源负电压的最大值并传输至控制模块；
    所述通信模块用于接收显示信号并传输至控制模块，该显示信号包括需要显示的画面中的最高灰阶值或最高数据信号电压、以及帧同步信号；
    所述存储模块用于存储预设的需要显示的画面中的最高灰阶值或最高数据信号电压、电源负电压、以及最小电源正电压的对应关系，该对应关系形成查找表；
    所述控制模块用于根据需要显示的画面中的最高灰阶值或最高数据信号电压、及输入侦测子像素的电源负电压的最大值，从存储模块的查找表得到对应的最小电源正电压并产生对应的控制信号传输至电压输出模块，并用于根据帧同步信号更新所述控制信号；
    所述电压输出模块用于根据控制信号产生对应的电源正电压输出至OLED面板；
    其中，所述侦测子像素包括第一薄膜晶体管、第二薄膜晶体管、第三薄膜晶体管、第一电容、及第一有机发光二极管；
    所述第一薄膜晶体管的栅极接入扫描信号，源极接入数据信号，漏极电性连接第二薄膜晶体管的栅极；所述第二薄膜晶体管的漏极电性连接电压输出模块接入电源正电压，源极电性连接第一有机发光二极管的阳极；所述第三薄膜晶体管的栅极接入感测信号，源极电性连接第一有机发光二极管的阴极，漏极电性连接侦测模块；所述第一电容的两端分别电性连接第二薄膜晶体管的栅极和漏极；所述第一有机发光二极管的阴极电性连接对应的OVSS走线；
    除侦测子像素外的每一子像素均包括第四薄膜晶体管、第五薄膜晶体管、第二电容、及第二有机发光二极管；
    所述第四薄膜晶体管的栅极接入扫描信号，源极接入数据信号，漏极电性连接第五薄膜晶体管的栅极；所述第五薄膜晶体管的漏极电性连接电压输出模块接入电源正电压，源极电性连接第二有机发光二极管阳极；所述第二电容的两端分别电性连接第五薄膜晶体管的栅极和漏极；所述第二有机发光二极管的阴极电性连接对应的OVSS走线；
    其中，在侦测模块获取侦测子像素对应的OVSS走线向其输入的电源负电压时，所述感测信号控制第三薄膜晶体管导通；
    还包括与所述通信模块及OLED面板均电性连接的源极驱动芯片，所述显示信号由源极驱动芯片传输至通信模块。
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