WO2016197525A1 - 像素驱动电路、阵列基板和显示装置 - Google Patents

像素驱动电路、阵列基板和显示装置 Download PDF

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Publication number
WO2016197525A1
WO2016197525A1 PCT/CN2015/093393 CN2015093393W WO2016197525A1 WO 2016197525 A1 WO2016197525 A1 WO 2016197525A1 CN 2015093393 W CN2015093393 W CN 2015093393W WO 2016197525 A1 WO2016197525 A1 WO 2016197525A1
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Prior art keywords
transistor
module
control
pole
signal
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PCT/CN2015/093393
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English (en)
French (fr)
Inventor
盖翠丽
曹昆
张保侠
李永谦
李全虎
王龙彦
尹静文
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京东方科技集团股份有限公司
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Priority to US15/116,624 priority Critical patent/US10276098B2/en
Publication of WO2016197525A1 publication Critical patent/WO2016197525A1/zh

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
    • G09G3/3233—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the current through the light-emitting element
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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]
    • G09G3/3225—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
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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]
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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
    • G09G3/3291—Details of drivers for data electrodes in which the data driver supplies a variable data voltage for setting the current through, or the voltage across, the light-emitting elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier
    • H01L27/12—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being other than a semiconductor body, e.g. an insulating body
    • H01L27/1214—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
    • H01L27/1255—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs integrated with passive devices, e.g. auxiliary capacitors
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • H10K59/123—Connection of the pixel electrodes to the thin film transistors [TFT]
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • H10K59/131—Interconnections, e.g. wiring lines or terminals
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    • 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
    • G09G2300/0421—Structural details of the set of electrodes
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    • 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
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Definitions

  • the present disclosure relates to displaying a pixel driving circuit, an array substrate, and a display device.
  • OLED Organic Light Emitting Diode
  • PMOLEDs passive matrix driving organic light-emitting diodes
  • AMOLEDs active matrix driving organic light-emitting diodes
  • Conventional PMOLEDs need to reduce the driving time of a single pixel as the size of the display device increases. Therefore, it is necessary to increase the transient current, thereby causing an increase in power consumption; at the same time, the operating voltage of the OLED is too high, resulting in a decrease in work efficiency.
  • AMOLED technology each OLED scans the input current progressively through a Thin Film Transistor (TFT) switching circuit, which can well solve the above problem.
  • TFT Thin Film Transistor
  • the TFT switching circuit mostly uses a low temperature polysilicon thin film transistor (LTPS TFT) or an oxide thin film transistor (Oxide TFT).
  • LTPS TFT low temperature polysilicon thin film transistor
  • Oxide TFT oxide thin film transistor
  • LTPS TFTs and Oxide TFTs have higher mobility and more stable characteristics, and are more suitable for use in AMOLED displays.
  • TFT switching circuits fabricated on large-area glass substrates often exhibit non-uniformities in electrical parameters such as threshold voltage and mobility, resulting in inconsistent threshold voltage shifts of the respective TFTs.
  • the threshold voltage of the TFT may drift due to long-time pressurization and high temperature.
  • the threshold drift of the TFTs in different parts of the panel is different, resulting in a difference in display brightness, and image sticking may occur. It also causes the current of the driving diode to be unstable, which leads to a difference in brightness of the OLED display device, and a problem of uneven brightness, which affects the display effect of the display device.
  • Embodiments of the present disclosure provide a pixel driving circuit, an array substrate, and a display device.
  • a first aspect of the present disclosure provides a pixel driving circuit, where the pixel driving circuit includes: a compensation module, a control module, a driving module, and a light emitting module, wherein:
  • the compensation module is connected to the scan signal, the data signal and the reference signal, and the compensation module is further connected to the control module and the driving module, and is configured to receive the data signal and the reference signal under the control of the scan signal, Compensating for a threshold voltage of the driving module under the control of the control module;
  • the control module is connected to the illumination control signal and the power supply signal, and the control module is further connected to the driving module and the illumination module, configured to receive the power signal under the control of the illumination control signal, and control the compensation
  • the module compensates a threshold voltage of the driving module
  • One end of the light emitting module is connected to the driving module, and the other end of the light emitting module is grounded;
  • the driving module is configured to drive the light emitting module to emit light under the control of the control module.
  • the compensation module includes:
  • a gate of the first transistor is connected to a scan signal, a first pole of the first transistor is connected to a data signal, and a second pole of the first transistor is connected to the control module;
  • a gate of the second transistor is connected to a scan signal, a first pole of the second transistor is connected to a reference signal, and a second pole of the second transistor is connected to a second end of the first capacitor;
  • a first end of the second capacitor is connected to a second pole of the second transistor, and a second end of the second capacitor is connected to a second pole of the third transistor;
  • a third transistor a gate of the third transistor is connected to the scan signal, a first pole of the third transistor is connected to the control module and the driving module, and a second pole of the third transistor is The drive modules are connected.
  • control module includes:
  • a fourth transistor a gate of the fourth transistor is connected to the light emission control signal, a first pole of the fourth transistor is connected to the power signal, and a second pole of the fourth transistor is opposite to the driving module Connected to the compensation module;
  • a gate of the sixth transistor is connected to the light emission control signal
  • the first pole of the sixth transistor is connected to the compensation module
  • the second pole of the sixth transistor is connected to the driving module and the light emitting module.
  • the driving module includes: a fifth transistor, wherein:
  • a gate of the fifth transistor is connected to the compensation module, a first pole of the fifth transistor is connected to the compensation module and the control module, and a second pole of the fifth transistor is connected to the control module Connected to the light emitting module.
  • the light emitting module comprises: an organic light emitting diode, wherein:
  • An input end of the organic light emitting diode is connected to the control module and the driving module, and an output end of the organic light emitting diode is grounded.
  • the first transistor, the second transistor, and the third transistor are both N-type transistors or the same P-type transistors.
  • the fourth transistor and the sixth transistor are both N-type transistors or the same P-type transistors.
  • the fifth transistor is an N-type transistor.
  • an array substrate comprising any one of the pixel driving circuits described in the first aspect.
  • a display device comprising the array substrate of the second aspect.
  • the control module receives the data signal and the reference signal under the control of the scanning signal, and the control module receives the power signal under the control of the lighting control signal to implement control.
  • the module control compensation module compensates the threshold voltage of the driving transistor, solves the problem of current difference caused by the instability of the threshold voltage of the driving transistor, avoids the problem of uneven brightness of the display device, and enhances the display effect of the display device.
  • FIG. 1 is a schematic structural diagram of a pixel driving circuit according to an embodiment of the present disclosure
  • FIG. 2 is a schematic structural diagram of another pixel driving circuit according to an embodiment of the present disclosure.
  • FIG. 3 is an operation timing diagram of a pixel driving circuit according to an embodiment of the present disclosure.
  • FIG. 4 is a schematic structural diagram of an equivalent circuit of a pixel driving circuit in a compensation phase according to an embodiment of the present disclosure
  • FIG. 5 is a schematic structural diagram of an equivalent circuit of a pixel driving circuit in an emission stage according to an embodiment of the present disclosure
  • FIG. 6 is a characteristic diagram of an initial voltage of an organic light emitting diode in a pixel driving circuit of an embodiment of the present disclosure.
  • FIG. 1 illustrates a pixel driving circuit provided by an embodiment of the present disclosure.
  • the pixel driving circuit includes a compensation module 11 , a control module 12 , a driving module 13 , and a light emitting module 14 .
  • the compensation module 11 is connected to the scan signal Scan, the data signal Vdata and the reference signal VREF, and the compensation module 11 is also connected to the control module 12 and the drive module 13.
  • the control module 12 is connected to the illumination control signal EM and the power supply signal ELVDD, and the control module 12 is also connected to the drive module 13 and the illumination module 14.
  • One end of the light emitting module 14 is connected to the driving module 13, and the other end of the light emitting module 14 is grounded.
  • the compensation module 11 is configured to receive the data signal Vdata and the reference signal VREF under the control of the scan signal Scan, and compensate the threshold voltage of the driving module 13 under the control of the control module.
  • the control module 12 is configured to receive the power signal ELVDD under the control of the light emission control signal EM, and control the compensation module to compensate the threshold voltage of the driving module;
  • the driving module 13 is configured to drive the light emitting module 14 to emit light under the control of the control module 12.
  • the pixel driving circuit receives the data signal and the reference signal under the control of the scanning signal by the compensation module, and the control module receives the power signal under the control of the lighting control signal, so that the control module controls the compensation module to the driving transistor.
  • the threshold voltage is compensated to solve the problem of current difference caused by the instability of the threshold voltage of the driving transistor, avoiding the problem of uneven brightness of the display device, and enhancing the display effect of the display device.
  • FIG. 2 is a schematic structural diagram of another pixel driving circuit according to an embodiment of the present disclosure.
  • the compensation module 11 includes a first transistor T1, a second transistor T2, a third transistor T3, a first capacitor C1, and a second capacitor C2.
  • the gate of the first transistor T1 is connected to the scan signal Scan, the first pole of the first transistor T1 is connected to the data signal Vdata, and the second pole of the first transistor T1 is connected to the control module 12.
  • the gate of the second transistor T2 is connected to the scan signal Scan, the first pole of the second transistor T2 is connected to the reference signal VREF, and the second pole of the second transistor T2 is connected to the second end of the first capacitor C1.
  • the first end of the first capacitor C1 is connected to the second pole of the first transistor T1.
  • the first end of the second capacitor C2 is connected to the second pole of the second transistor T2, and the second end of the second capacitor C2 is connected to the second pole of the third transistor T3.
  • the gate of the third transistor T3 is connected to the scan signal Scan, the first pole of the third transistor T3 is connected to the control module 12 and the drive module 13, and the second pole of the third transistor T3 is connected to the drive module 13.
  • control module 12 may include a fourth transistor T4 and a sixth transistor T6.
  • the gate of the fourth transistor T4 is connected to the light emission control signal EM, the first electrode of the fourth transistor T4 is connected to the power supply signal ELVDD, and the second electrode of the fourth transistor T4 is connected to the driving module 13 and the compensation module 11.
  • the gate of the sixth transistor T6 is connected to the light emission control signal EM, the first electrode of the sixth transistor T6 is connected to the compensation module 11, and the second electrode of the sixth transistor T6 is connected to the driving module 13 and the light emitting module 14.
  • the driving module 13 may include a fifth transistor T5.
  • the gate of the fifth transistor T5 is connected to the compensation module 11, the first pole of the fifth transistor T5 is connected to the compensation module 11 and the control module 12, and the second pole of the fifth transistor T5 is connected to the control module 12 and the light-emitting module 14.
  • the light emitting module 14 may include an organic light emitting diode OLED.
  • the input end of the organic light emitting diode OLED is connected to the control module 12 and the driving module 13, and the output end of the organic light emitting diode OLED is grounded to VSS.
  • the second pole of the first transistor may be connected to the first pole of the sixth transistor; the first pole of the third transistor may be connected to the second pole of the fourth transistor; the first pole of the fifth transistor The second pole of the fifth transistor may be connected to the input end of the organic light emitting diode; the second pole of the sixth transistor may be connected to the fifth transistor Two pole connection.
  • the first transistor T1, the second transistor T2, and the third transistor T3 in the compensation module 11 may belong to the same type of transistor.
  • T1, T2, and T3 may be either N-type transistors or P-type transistors.
  • the fourth transistor T4 and the sixth transistor T6 in the control module 12 may belong to the same type of transistor.
  • T4 and T6 can be either N-type transistors or P-type transistors.
  • the fifth transistor T5 may be an N-type transistor.
  • the transistors used in all embodiments of the present disclosure may be thin film transistors or field effect transistors or other devices having the same characteristics. Since the sources and drains of the transistors used herein are symmetrical, the source and the drain are interchangeable. of. In the embodiment of the present disclosure, in order to distinguish the two poles of the transistor except the gate, one of the poles is referred to as a source and the other pole is referred to as a drain. Further, the transistor employed in the embodiment of the present disclosure includes two types of a P-type transistor and an N-type transistor.
  • the first transistor T1, the second transistor T2, the third transistor T3, the fourth transistor T4, the fifth transistor T5, and the sixth transistor T6 are all N-type transistors, and the fifth transistor T5 is a driving transistor as an example.
  • the first end of the first capacitor C1 is defined as node a
  • the first end of the second capacitor C1 and the second end of the second capacitor C2 are defined as node E
  • the second capacitor C2 is second.
  • the end is defined as node b
  • the input of the organic light emitting diode is defined as node c.
  • the operation timing chart of the pixel driving circuit is as shown in FIG.
  • the working process of the pixel driving circuit may include three phases: a reset phase, a compensation phase, and an illumination phase. The following is a detailed description of each working phase of the pixel driving circuit;
  • the reset is as shown in FIG. 3.
  • the scan signal Scan and the light emission control signal EM are both at a high level.
  • the equivalent circuit diagram of the pixel-driven circuit in the reset stage in the embodiment of the present disclosure is as shown in FIG. 2, at this time, the first transistor T1, the second transistor T2, the third transistor T3, the fourth transistor T4, and the driving transistor T5.
  • the sixth transistor T6 is both turned on, the voltage of the first end of the first capacitor C1, that is, the voltage of the node a is the voltage Vdata of the data signal, and the voltage of the first end of the first capacitor C1 and the first end of the second capacitor C2 is the node E.
  • the voltage is the voltage VREF of the reference signal, and the voltage of the second terminal of the second capacitor C2, that is, the voltage of the node b is the power signal voltage ELVDD. Therefore, the voltage across the first capacitor C1 and the second capacitor C2 and the gate voltage of the driving transistor T5 are reset, so that the working process of the next cycle is not affected by the voltage signal generated during the previous cycle of operation, avoiding There is a problem with the afterimage.
  • the scan signal Scan is at a high level.
  • the illumination control signal EM is at a low level.
  • the equivalent circuit diagram of the pixel-driven circuit in the compensation stage in the embodiment of the present disclosure is as shown in FIG. 4, at this time, the first transistor T1, the second transistor T2, the third transistor T3, and the driving transistor T5 are both turned on; The four transistors T4 and the sixth transistor T6 are both turned off.
  • the driving transistor T5 is equivalent to the PN junction, because the voltage of the node c is Voled0, and the voltage of the node b becomes Voled0+Vth; wherein, Voled0 is the initial voltage of the organic light emitting diode, and Vth is The threshold voltage of the driving transistor. Therefore, at the end of the compensation phase, the voltage of the first terminal of the first capacitor C1, that is, the voltage of the node a is Vdata, and the voltage of the second terminal of the first capacitor C1 and the first terminal of the second capacitor C2, that is, the voltage of the node E is VREF. The voltage at the second end of the second capacitor C2, that is, the voltage at the node b is Voled0+Vth. At this time, the voltage difference between the first capacitor C1 is Vdata-VREF, and the voltage difference between the second capacitor C2 is VREF-Voled0-Vth.
  • the scan signal Scan is at a low level
  • the light-emission control signal EM is at a high level.
  • the first transistor T1, the second transistor T2, and the third transistor T3 are all turned off; the fourth transistor T4, the driving The transistor T5 and the sixth transistor T6 are both turned on; the driving transistor T5 drives the organic light emitting diode OLED to emit light, and the voltage of the node c is Voled1; wherein Voled1 is the operating voltage of the organic light emitting diode; thus, the voltage of the node a becomes Voled1. Due to the bootstrap effect of the first capacitor C1 and the second capacitor C2, the voltage difference between the first capacitor C1 and the second capacitor C2 remains unchanged, and the voltage difference across the first capacitor C1 in the compensation phase is Vdata.
  • the current value flowing through the driving transistor T5 after the light emitting phase is only related to the initial voltage of the organic light emitting diode and the voltage of the data signal, and
  • the threshold voltage of the driving transistor is not related to the operating voltage of the organic light emitting diode. Therefore, the influence of the threshold voltage on the current flowing through the organic light emitting diode is eliminated. At the same time, the influence of the instability of the operating voltage Voled1 of the OLED on the current due to the non-uniformity of the organic light emitting diode can be avoided, and the problem of current difference is avoided.
  • FIG. 6 is a characteristic diagram showing an initial voltage of an organic light emitting diode in a pixel driving circuit of an embodiment of the present disclosure.
  • the horizontal axis thereof represents the use time of the organic light emitting diode OLED
  • the vertical axis thereof represents the magnitude of the initial voltage value Voled0 of the organic light emitting diode.
  • the initial voltage Voled0 of the organic light emitting diode gradually becomes larger as the OLERD is used. Therefore, the pixel-driven circuit in the present disclosure can gradually increase the current flowing through the light-emitting diode OLED as the OLED ages, which can well solve the problem of brightness degradation of the display device caused by aging of the OLED, thereby ensuring current stability. In this case, the lifetime of the organic light emitting diode OLED can be increased.
  • the first transistor T1, the second transistor T2, the third transistor T3, the fourth transistor T4, the fifth transistor T5, and the sixth transistor T6 are all N-type transistors as an example, and there is no description.
  • the above-mentioned transistor can only be an N-type transistor.
  • a transistor that satisfies a specific principle can be selected according to specific needs; if the first transistor T1, the second transistor T2, the third transistor T3, the fourth transistor T4, and the fifth
  • the transistor T5 and the sixth transistor T6 are both P-type transistors, and the operation timing chart of the pixel driving circuit is exactly opposite to the timing chart shown in FIG.
  • Other situations can be designed according to specific needs.
  • the pixel driving circuit receives the data signal and the reference signal under the control of the scanning signal by the compensation module, and the control module receives the power signal under the control of the lighting control signal, so that the control module controls the compensation module to the driving transistor.
  • the threshold voltage is compensated to solve the problem of current difference caused by the instability of the threshold voltage of the driving transistor, avoiding the problem of uneven brightness of the display device, and enhancing the display effect of the display device.
  • Embodiments of the present disclosure provide an array substrate including the pixel driving circuit in the above embodiment.
  • the pixel driving circuit part is the same as the above embodiment, and details are not described herein again.
  • the structure of other parts of the array substrate can refer to the prior art, and will not be described in detail herein.
  • the array substrate receives the data signal and the reference signal under the control of the scan signal by the compensation module in the pixel drive circuit of the array substrate, and the control module is Receiving the power signal under the control of the illumination control signal, the control module control compensation module compensates the threshold voltage of the driving transistor, solves the problem of current difference caused by the instability of the threshold voltage of the driving transistor, and avoids uneven brightness of the display device. The problem is that the display of the display device is enhanced.
  • Embodiments of the present disclosure provide a display device including the array substrate in the above embodiment.
  • the array substrate portion is the same as the above embodiment, and details are not described herein again.
  • the structure of other parts of the display device can refer to the prior art, and will not be described in detail herein.
  • the display device may be a product or a component having a display function, such as a computer display, a television display, a digital photo frame, a mobile phone, a tablet computer, etc., and is not specifically limited in the embodiment of the present disclosure.
  • the display device receives the data signal and the reference signal under the control of the scan signal by the compensation module in the pixel drive circuit of the display device, and the control module receives the power signal under the control of the illumination control signal to implement the control module.
  • the control compensation module compensates the threshold voltage of the driving transistor, solves the problem of current difference caused by the instability of the threshold voltage of the driving transistor, avoids the problem of uneven brightness of the display device, and enhances the display effect of the display device.
  • the foregoing program may be stored in a computer readable storage medium, and the program is executed when executed.
  • the foregoing steps include the steps of the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

Abstract

一种像素驱动电路、阵列基板和显示装置。像素电路包括：补偿模块(11)、控制模块(12)、驱动模块(13)和发光模块(14)。其中补偿模块(11)连接扫描信号(Scan)、数据信号(Vdata)和参考信号(VREF)，补偿模块(11)还与控制模块(12)和驱动模块(13)连接，用于在扫描信号(Scan)控制下接收数据信号(Vdata)和参考信号(VREF)，在控制模块(12)的控制下补偿驱动模块(13)的阈值电压；控制模块(12)连接发光控制信号(EM)和电源信号(ELVDD)，控制模块(12)还与驱动模块(13)和发光模块(14)连接，用于在发光控制信号(EM)控制下接收电源信号(ELVDD)控制补偿模块(11)对驱动模块(13)的阈值电压进行补偿；发光模块(14)一端与驱动模块(13)连接，另一端接地(VSS)；驱动模块(13)在控制模块(12)的控制下驱动发光模块(14)发光。像素驱动电路能够避免出现显示器件亮度不均匀，增强了显示器件的显示效果。

Description

像素驱动电路、阵列基板和显示装置 技术领域
本公开涉及显示一种像素驱动电路、阵列基板和显示装置。
背景技术
有机发光二极管(Organic Light Emitting Diode，简称OLED)作为一种电流型发光器件，因其所具有的自发光、快速响应、宽视角和可制作在柔性衬底上等特点而越来越多地被应用于高性能显示领域当中。OLED按驱动方式可分为无源矩阵驱动有机发光二极管(Passive Matrix Driving OLED，简称PMOLED)和有源矩阵驱动有机发光二极管(Active Matrix Driving OLED，简称AMOLED)两种。传统的PMOLED随着显示装置尺寸的增大，需要降低单个像素的驱动时间，因而需要增大瞬态电流，从而导致功耗上升；同时，会使OLED的工作电压过高，导致工作效率下降。而AMOLED技术中，每个OLED均通过薄膜晶体管(Thin Film Transistor，简称TFT)开关电路逐行扫描输入电流，可以很好地解决上述问题。
在现有的AMOLED面板中，TFT开关电路多采用低温多晶硅薄膜晶体管(LTPS TFT)或氧化物薄膜晶体管(Oxide TFT)。与一般的非晶硅薄膜晶体管(amorphous-Si TFT)相比，LTPS TFT和Oxide TFT具有更高的迁移率和更稳定的特性，更适合应用于AMOLED显示中。但是由于晶化工艺和制作水平的限制，导致在大面积玻璃基板上制作的TFT开关电路常常在诸如阈值电压、迁移率等电学参数上出现非均匀性，从而使得各个TFT的阈值电压偏移不一致；另外，在长时间加压和高温下也会导致TFT的阈值电压出现漂移，由于显示画面不同，面板各部分TFT的阈值漂移量不同，从而造成显示亮度差异，会出现残影现象。还会导致驱动二极管的电流不稳定，进而导致OLED显示器件的亮度差异，出现亮度不均匀的问题，影响显示器件的显示效果。
发明内容
本公开的实施例提供一种像素驱动电路、阵列基板和显示装置。
本公开的第一方面，提供一种像素驱动电路，所述像素驱动电路包括：补偿模块、控制模块、驱动模块、发光模块，其中：
所述补偿模块连接扫描信号、数据信号和参考信号，所述补偿模块还与所述控制模块和所述驱动模块连接，用于在所述扫描信号的控制下接收所述数据信号和参考信号，在所述控制模块的控制下补偿所述驱动模块的阈值电压；
所述控制模块连接发光控制信号和电源信号，所述控制模块还与所述驱动模块和所述发光模块连接，用于在所述发光控制信号的控制下接收所述电源信号，控制所述补偿模块对所述驱动模块的阈值电压进行补偿；
所述发光模块的一端与所述驱动模块连接，所述发光模块的另一端接地；
所述驱动模块用于在所述控制模块的控制下驱动所述发光模块发光。
可选地，所述补偿模块包括：
第一晶体管，所述第一晶体管的栅极与扫描信号连接，所述第一晶体管的第一极与数据信号连接，所述第一晶体管的第二极与所述控制模块连接；
第二晶体管，所述第二晶体管的栅极与扫描信号连接，所述第二晶体管的第一极与参考信号连接，所述第二晶体管的第二极与第一电容的第二端连接；
第一电容，所述第一电容的第一端与所述第一晶体管的第二极连接；
第二电容，所述第二电容的第一端与所述第二晶体管的第二极连接，所述第二电容的第二端与第三晶体管的第二极连接；
第三晶体管，所述第三晶体管的栅极与所述扫描信号连接，所述第三晶体管的第一极与所述控制模块和所述驱动模块连接，所述第三晶体管的第二极与所述驱动模块连接。
可选地，所述控制模块包括：
第四晶体管，所述第四晶体管的栅极与所述发光控制信号连接，所述第四晶体管的第一极与所述电源信号连接，所述第四晶体管的第二极与所述驱动模块和所述补偿模块连接；
第六晶体管，所述第六晶体管的栅极与所述发光控制信号连接，所 述第六晶体管的第一极与所述补偿模块连接，所述第六晶体管的第二极与所述驱动模块和所述发光模块连接。
可选地，所述驱动模块包括：第五晶体管，其中：
所述第五晶体管的栅极与所述补偿模块连接，所述第五晶体管的第一极与所述补偿模块和所述控制模块连接，所述第五晶体管的第二极与所述控制模块和所述发光模块连接。
可选地，所述发光模块包括：有机发光二极管，其中：
所述有机发光二极管的输入端与所述控制模块和所述驱动模块连接，所述有机发光二极管的输出端接地。
可选地，所述第一晶体管、所述第二晶体管和所述第三晶体管同为N型晶体管或者同为P型晶体管。
可选地，所述第四晶体管和所述第六晶体管同为N型晶体管或者同为P型晶体管。
可选地，所述第五晶体管为N型晶体管。
本公开的第二方面，提供一种阵列基板，所述阵列基板包括第一方面所述的任一像素驱动电路。
本公开的第三方面，提供一种显示装置，所述显示装置包括第二方面所述的阵列基板。
在本公开的实施例提供的像素驱动电路、阵列基板和显示装置中，通过补偿模块在扫描信号的控制下接收数据信号和参考信号，控制模块在发光控制信号的控制下接收电源信号，实现控制模块控制补偿模块对驱动晶体管的阈值电压进行补偿，解决了驱动晶体管阈值电压的不稳定性造成的电流差异的问题，避免出现显示器件亮度不均匀的问题，增强了显示器件的显示效果。
附图说明
图1为本公开的实施例提供的一种像素驱动电路的结构示意图；
图2为本公开的实施例提供的另一种像素驱动电路的结构示意图；
图3为本公开的实施例提供的一种像素驱动电路的工作时序图；
图4为本公开的实施例提供的一种像素驱动电路在补偿阶段的等效电路的结构示意图；
图5为本公开的实施例提供的一种像素驱动电路在发光阶段的等效电路的结构示意图；
图6为本公开的实施例的像素驱动电路中的有机发光二极管的初始电压的特征曲线图。
具体实施方式
下面将结合附图，对本公开实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本公开一部分实施例，而不是全部的实施例。基于本公开中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本公开保护的范围。
图1示出了本公开的实施例提供的一种像素驱动电路。参照图1所示，该像素驱动电路包括：补偿模块11、控制模块12、驱动模块13、发光模块14。
在图1所示电路中，补偿模块11连接扫描信号Scan、数据信号Vdata和参考信号VREF，补偿模块11还与控制模块12和驱动模块13连接。
控制模块12连接发光控制信号EM和电源信号ELVDD，控制模块12还与驱动模块13和发光模块14连接。
发光模块14的一端与驱动模块13连接，发光模块14的另一端接地。
补偿模块11用于在扫描信号Scan的控制下接收数据信号Vdata和参考信号VREF，在所述控制模块的控制下补偿驱动模块13的阈值电压。
控制模块12用于在发光控制信号EM的控制下接收电源信号ELVDD，控制所述补偿模块对所述驱动模块的阈值电压进行补偿；
驱动模块13用于在控制模块12的控制下驱动发光模块14发光。
本公开的实施例提供的像素驱动电路，通过补偿模块在扫描信号的控制下接收数据信号和参考信号，控制模块在发光控制信号的控制下接收电源信号，实现控制模块控制补偿模块对驱动晶体管的阈值电压进行补偿，解决了驱动晶体管阈值电压的不稳定性造成的电流差异的问题，避免出现显示器件亮度不均匀的问题，增强了显示器件的显示效果。
图2示出本公开的实施例提供的另一种像素驱动电路的结构示意图。如图2中所示，补偿模块11包括：第一晶体管T1、第二晶体管T2、第三晶体管T3、第一电容C1和第二电容C2。
在图2所示电路中，第一晶体管T1的栅极与扫描信号Scan连接，第一晶体管T1的第一极与数据信号Vdata连接，第一晶体管T1的第二极与控制模块12连接。
第二晶体管T2的栅极与扫描信号Scan连接，第二晶体管T2的第一极与参考信号VREF连接，第二晶体管T2的第二极与第一电容C1的第二端连接。
第一电容C1的第一端与第一晶体管T1的第二极连接。
第二电容C2的第一端与第二晶体管T2的第二极连接，第二电容C2的第二端与第三晶体管T3的第二极连接。
第三晶体管T3的栅极与扫描信号Scan连接，第三晶体管T3的第一极与控制模块12和驱动模块13连接，第三晶体管T3的第二极与驱动模块13连接。
进一步地，如图2中所示，控制模块12可包括：第四晶体管T4和第六晶体管T6。
第四晶体管T4的栅极与发光控制信号EM连接，第四晶体管T4的第一极与电源信号ELVDD连接，第四晶体管T4的第二极与驱动模块13和补偿模块11连接。
第六晶体管T6的栅极与发光控制信号EM连接，第六晶体管T6的第一极与补偿模块11连接，第六晶体管T6的第二极与驱动模块13和发光模块14连接。
进一步地，如图2中所示，驱动模块13可包括：第五晶体管T5。
第五晶体管T5的栅极与补偿模块11连接，第五晶体管T5的第一极与补偿模块11和控制模块12连接，第五晶体管T5的第二极与控制模块12和发光模块14连接。
如图2中所示，发光模块14可包括：有机发光二极管OLED。
有机发光二极管OLED的输入端与控制模块12和驱动模块13连接，有机发光二极管OLED的输出端接地VSS。
如图2中所示，第一晶体管的第二极可以与第六晶体管的第一极连接；第三晶体管的第一极可以与第四晶体管的第二极连接；第五晶体管的第一极可以与第四晶体管的第二极连接，第五晶体管的第二极与有机发光二极管的输入端连接；第六晶体管的第二极可以与第五晶体管的第 二极连接。
示例性地，补偿模块11中的第一晶体管T1、第二晶体管T2和第三晶体管T3可以属于同一类型的晶体管。例如，T1、T2和T3可以同为N型的晶体管或者同为P型的晶体管。
控制模块12中的第四晶体管T4和第六晶体管T6可以属于同一类型的晶体管。例如，T4和T6可以同为N型晶体管或者同为P型晶体管。
第五晶体管T5可以为N型晶体管。
本公开所有实施例中采用的晶体管可以为薄膜晶体管或场效应管或其他特性相同的器件，由于这里采用的晶体管的源极、漏极是对称的，所以其源极、漏极是可以互换的。在本公开实施例中，为区分晶体管除栅极之外的两极，将其中一极称为源极，另一极称为漏极。此外本公开实施例所采用的晶体管包括P型晶体管和N型晶体管两种。
下面以第一晶体管T1、第二晶体管T2、第三晶体管T3、第四晶体管T4、第五晶体管T5和第六晶体管T6都为N型的晶体管，第五晶体管T5为驱动晶体管为例进行说明。如图2所示，为方便理解将第一电容C1第一端定义为节点a，第一电容C1第二端和第二电容C2的第一端定义为节点E，第二电容C2的第二端定义为节点b，有机发光二极管输入端定义为节点c。此时，像素驱动电路的工作时序图如图3中所示。该像素驱动电路的工作过程可以包括三个阶段：复位阶段、补偿阶段和发光阶段，以下对该像素驱动电路的各个工作阶段进行详细的说明；
复位如图3所示，在第一阶段即复位阶段中，扫描信号Scan和发光控制信号EM均为高电平。本公开实施例中的像素驱动的电路在复位阶段的等效电路图如图2中所示，此时，第一晶体管T1、第二晶体管T2、第三晶体管T3、第四晶体管T4、驱动晶体管T5和第六晶体管T6均导通，第一电容C1第一端的电压即节点a的电压为数据信号的电压Vdata，第一电容C1第二端和第二电容C2第一端的电压即节点E的电压为参考信号的电压VREF，第二电容C2第二端的电压即节点b的电压为电源信号电压ELVDD。因此，第一电容C1和第二电容C2两端的电压和驱动晶体管T5的栅极电压实现了复位，使得下一周期的工作过程不受上一周期的工作过程中产生的电压信号的影响，避免出现残像的问题。
在第二阶段即补偿阶段中，如图3所示，扫描信号Scan为高电平， 发光控制信号EM为低电平。本公开实施例中的像素驱动的电路在补偿阶段的等效电路图如图4中所示，此时，第一晶体管T1、第二晶体管T2、第三晶体管T3和驱动晶体管T5均导通；第四晶体管T4和第六晶体管T6均关闭。由于第三晶体管T3导通，因此驱动晶体管T5相当于PN结，因为节点c的电压为Voled0，此时节点b的电压变为Voled0+Vth；其中，Voled0为有机发光二极管的初始电压，Vth为驱动晶体管的阈值电压。因此，在补偿阶段结束时，第一电容C1第一端的电压即节点a的电压为Vdata，第一电容C1第二端和第二电容C2第一端的电压即节点E的电压为VREF，第二电容C2第二端的电压即节点b的电压为Voled0+Vth。此时，第一电容C1两端的电压差值为Vdata-VREF，第二电容C2两端的电压差值为VREF-Voled0-Vth。
在第三阶段即发光阶段中，如图3所示，扫描信号Scan为低电平，发光控制信号EM为高电平。本公开实施例中的像素驱动的电路在发光阶段的等效电路图如图5中所示，此时，第一晶体管T1、第二晶体管T2和第三晶体管T3均关闭；第四晶体管T4、驱动晶体管T5和第六晶体管T6均导通；驱动晶体管T5驱动有机发光二极管OLED发光，节点c的电压为Voled1；其中，Voled1为有机发光二极管的工作电压；因而，节点a的电压变为Voled1。由于第一电容C1和第二电容C2的自举效应的存在，第一电容C1和第二电容C2两端的电压差值保持不变，同时在补偿阶段第一电容C1两端的电压差值为Vdata-VREF，因此节点E的电压为Voled1+VREF-Vdata；而在补偿阶段第二电容C2两端的电压差值为VREF-Voled0-Vth，因此节点b的电压为Voled1+Voled0+Vth-Vdata；最终，驱动晶体管T5上的过驱动电压为Voled1+Voled0+Vth-Vdata-Voled1-Vth；因此，节流驱动晶体管T5的电流为：
Figure PCTCN2015093393-appb-000001
如此，可以很明显的得到，经过发光阶段之后流经驱动晶体管T5的电流值只与有机发光二极管的初始电压和数据信号的电压有关系，而与 驱动晶体管的阈值电压和有机发光二极管的工作电压没有关系。因此，消除了阈值电压对流经有机发光二极管的电流的影响。同时，可以避免因为有机发光二极管的非均匀性引起OLED的工作电压Voled1的不稳定对电流的影响，避免了电流差异的问题。
进一步，图6示出本公开的实施例的像素驱动电路中的有机发光二极管的初始电压的特征曲线图。如图6中所示，其横轴表示有机发光二极管OLED的使用时间，其纵轴表示有机发光二极管的初始电压值Voled0的大小。有机发光二极管的初始电压Voled0随着OLERD使用时间逐渐变大。因此，本公开中的像素驱动的电路可以随着OLED的老化，流经发光二极管OLED的电流逐渐增大，可以很好的解决OLED的老化造成的显示器件亮度衰减的问题，进而在保证电流稳定的情况下可以增加有机发光二极管OLED的使用寿命。
需要说明的是，为了进一步增大有机发光二极管的电流，提高显示器件的显示亮度，本公开中示例性地可以采用能够提供负值的数据信号。当然，本公开实施例中只是以第一晶体管T1、第二晶体管T2、第三晶体管T3、第四晶体管T4、第五晶体管T5和第六晶体管T6都为N型晶体管为例进行说明，并没有限定上述晶体管只能是N型晶体管，在实际的应用中可以根据具体的需要选择满足具体原理的晶体管；若第一晶体管T1、第二晶体管T2、第三晶体管T3、第四晶体管T4、第五晶体管T5和第六晶体管T6均为P型晶体管，则像素驱动电路的工作时序图与图3中所示的时序图正好相反。其它情况可以根据具体的需求进行设计。
本公开的实施例提供的像素驱动电路，通过补偿模块在扫描信号的控制下接收数据信号和参考信号，控制模块在发光控制信号的控制下接收电源信号，实现控制模块控制补偿模块对驱动晶体管的阈值电压进行补偿，解决了驱动晶体管阈值电压的不稳定性造成的电流差异的问题，避免出现显示器件亮度不均匀的问题，增强了显示器件的显示效果。
本公开的实施例提供一种阵列基板，包括上述实施例中的像素驱动电路。其中，像素驱动电路部分同上述实施例，在此不再赘述。另外，阵列基板其他部分的结构可以参考现有技术，对此本文不再详细描述。
本公开的实施例提供的阵列基板，通过在阵列基板的像素驱动电路中补偿模块在扫描信号的控制下接收数据信号和参考信号，控制模块在 发光控制信号的控制下接收电源信号，实现控制模块控制补偿模块对驱动晶体管的阈值电压进行补偿，解决了驱动晶体管阈值电压的不稳定性造成的电流差异的问题，避免出现显示器件亮度不均匀的问题，增强了显示器件的显示效果。
本公开的实施例提供一种显示装置，包括上述实施例中的阵列基板。其中，阵列基板部分同上述实施例，在此不再赘述。另外，显示装置其他部分的结构可以参考现有技术，对此本文不再详细描述。该显示装置可以为电脑显示器、电视显示屏、数码相框、手机、平板电脑等具有显示功能的产品或者部件，本公开实施例中不做具体的限制。
本公开的实施例提供的显示装置，通过在显示装置的像素驱动电路中补偿模块在扫描信号的控制下接收数据信号和参考信号，控制模块在发光控制信号的控制下接收电源信号，实现控制模块控制补偿模块对驱动晶体管的阈值电压进行补偿，解决了驱动晶体管阈值电压的不稳定性造成的电流差异的问题，避免出现显示器件亮度不均匀的问题，增强了显示器件的显示效果。
本领域普通技术人员可以理解：实现上述方法实施例的全部或部分步骤可以通过程序指令相关的硬件来完成，前述的程序可以存储于一计算机可读取存储介质中，该程序在执行时，执行包括上述方法实施例的步骤；而前述的存储介质包括：ROM、RAM、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本公开的具体实施方式，但本公开的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本公开揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本公开的保护范围之内。因此，本公开的保护范围应以所述权利要求的保护范围为准。
本申请要求于2015年6月10日递交的中国专利申请第201510317207.6号的优先权，在此全文引用该中国专利申请公开的内容作为本申请的一部分。

Claims (10)

  1. 一种像素驱动电路，包括：补偿模块、控制模块、驱动模块、发光模块，其中：
    所述补偿模块连接有扫描信号、数据信号和参考信号，所述补偿模块还与所述控制模块和所述驱动模块连接，用于在所述扫描信号的控制下接收所述数据信号和参考信号，在所述控制模块的控制下补偿所述驱动模块的阈值电压；
    所述控制模块连接有发光控制信号和电源信号，所述控制模块还与所述驱动模块和所述发光模块连接，用于在所述发光控制信号的控制下接收所述电源信号，控制所述补偿模块对所述驱动模块的阈值电压进行补偿；
    所述发光模块的一端与所述驱动模块连接，所述发光模块的另一端接地；
    所述驱动模块用于在所述控制模块的控制下驱动所述发光模块发光。
  2. 根据权利要求1所述的像素驱动电路，其中，所述补偿模块包括：
    第一晶体管，所述第一晶体管的栅极与扫描信号连接，所述第一晶体管的第一极与数据信号连接，所述第一晶体管的第二极与所述控制模块连接；
    第二晶体管，所述第二晶体管的栅极与扫描信号连接，所述第二晶体管的第一极与参考信号连接，所述第二晶体管的第二极与第一电容的第二端连接；
    第一电容，所述第一电容的第一端与所述第一晶体管的第二极连接；
    第二电容，所述第二电容的第一端与所述第二晶体管的第二极连接，所述第二电容的第二端与第三晶体管的第二极连接；
    第三晶体管，所述第三晶体管的栅极与所述扫描信号连接，所述第 三晶体管的第一极与所述控制模块和所述驱动模块连接，所述第三晶体管的第二极与所述驱动模块连接。
  3. 根据权利要求1所述的像素驱动电路，其中，所述控制模块包括：
    第四晶体管，所述第四晶体管的栅极与所述发光控制信号连接，所述第四晶体管的第一极与所述电源信号连接，所述第四晶体管的第二极与所述驱动模块和所述补偿模块连接；
    第六晶体管，所述第六晶体管的栅极与所述发光控制信号连接，所述第六晶体管的第一极与所述补偿模块连接，所述第六晶体管的第二极与所述驱动模块和所述发光模块连接。
  4. 根据权利要求1所述的像素驱动电路，其中，所述驱动模块包括：第五晶体管，其中：
    所述第五晶体管的栅极与所述补偿模块连接，所述第五晶体管的第一极与所述补偿模块和所述控制模块连接，所述第五晶体管的第二极与所述控制模块和所述发光模块连接。
  5. 根据权利要求1所述的像素驱动电路，其中，所述发光模块包括：有机发光二极管，其中：
    所述有机发光二极管的输入端与所述控制模块和所述驱动模块连接，所述有机发光二极管的输出端接地。
  6. 根据权利要求2所述的像素驱动电路，其中，所述第一晶体管、所述第二晶体管和所述第三晶体管同为N型晶体管或者同为P型晶体管。
  7. 根据权利要求3所述的像素驱动电路，其中，所述第四晶体管和所述第六晶体管同为N型晶体管或者同为P型晶体管。
  8. 根据权利要求4所述的像素驱动电路，其中，所述第五晶体管为N型晶体管。
  9. 一种阵列基板，包括权利要求1～8任一所述的像素驱动电路。
  10. 一种显示装置，包括权利要求9所述的阵列基板。
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