WO2019095505A1 - 一种像素驱动电路、驱动方法及显示面板 - Google Patents

一种像素驱动电路、驱动方法及显示面板 Download PDF

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WO2019095505A1
WO2019095505A1 PCT/CN2017/117757 CN2017117757W WO2019095505A1 WO 2019095505 A1 WO2019095505 A1 WO 2019095505A1 CN 2017117757 W CN2017117757 W CN 2017117757W WO 2019095505 A1 WO2019095505 A1 WO 2019095505A1
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Prior art keywords
capacitor
switching transistor
driving circuit
control signal
switch tube
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French (fr)
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金羽锋
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Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Priority to US15/742,286 priority Critical patent/US20190156748A1/en
Publication of WO2019095505A1 publication Critical patent/WO2019095505A1/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
    • G09G3/3258—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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/021—Power management, e.g. power saving

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a pixel driving circuit, a driving method, and a display panel.
  • the pixel driving circuit can be used to provide a driving circuit for the display panel.
  • the current OLED is more and more recognized by consumers because of its wide color gamut, high contrast, energy saving, and foldability, and is widely used in various fields. kind of occasion.
  • OLED due to the characteristics of the OLED itself, its driving circuit needs to be able to provide a fine driving voltage.
  • the existing driving circuits of OLEDs require a large input driving voltage to drive, and the excessive input driving voltage easily leads to inconvenience in controlling the accuracy of the actual driving voltage, and at the same time causes a problem of large energy consumption of the OLED.
  • the present invention provides a pixel driving circuit, a driving method, and a display panel to solve the problem that the actual driving voltage accuracy is low due to an excessive input driving voltage range of the pixel driving circuit of the prior art.
  • the driving circuit includes: a first switching tube, a second switching tube and a third switching tube, a first capacitor and a second capacitor, and a light emitting device; the control end of the first switching tube is connected to the first control signal, and the input end is connected to the data a signal, the output end is electrically connected to the first end of the first capacitor and the control end of the third switch tube; the control end of the second switch tube is connected to the second control signal, the input end is connected to the data signal, and the output end is electrically connected to the first capacitor The second end and the first end of the second capacitor; the input end of the third switch tube is connected to the positive voltage of the power source, the output end is electrically connected to the second end of the second capacitor and the first end of the light emitting device; the second end of the light emitting device The terminal is electrically connected to the negative voltage of the power supply.
  • the present invention provides a driving method of a pixel driving circuit.
  • the pixel drive circuit is the above pixel drive circuit.
  • the driving method comprises: in the first stage, the first control signal provides a high potential, the first switching transistor is turned on, the second control signal provides a low potential, and the second switching transistor is turned off; in the second phase, the first control signal provides a low potential The first switching transistor is turned off; the second control signal provides a high potential, and the second switching transistor is turned on; in the third phase, the first control signal provides a low potential, the first switching transistor is turned off; the second control signal provides a low potential, The second switch is cut off.
  • the present application proposes a display panel.
  • the display panel includes the above Pixel drive circuit.
  • the pixel driving circuit of the present application includes a first switching transistor, a second switching transistor, and a third switching transistor, a first capacitor and a second capacitor, and a light emitting device; the control end of the first switching transistor is connected to the first control signal, and the input end The data signal is connected, the output end is electrically connected to the first end of the first capacitor and the control end of the third switch tube; the control end of the second switch tube is connected to the second control signal, the input end is connected to the data signal, and the output end is electrically connected a second end of the first capacitor and a first end of the second capacitor; an input end of the third switch tube is connected to the positive voltage of the power source, and the output end is electrically connected to the second end of the second capacitor and the first end of the light emitting device; The second end is electrically connected to the negative voltage of the power supply.
  • the actual driving voltage to the light emitting device can be improved by controlling the on and off of the first switching transistor and the second switching transistor in the pixel driving circuit of the present application, and utilizing the capacitive coupling characteristics of the first capacitor and the second capacitor. Therefore, the driving of the light emitting device can be realized by inputting a small driving voltage, and the actual driving voltage accuracy can be improved accordingly, and the power consumption can be reduced.
  • FIG. 1 is a schematic diagram showing the circuit structure of an embodiment of a pixel driving circuit of the present application
  • FIG. 2 is a schematic circuit diagram of another embodiment of a pixel driving circuit of the present application.
  • FIG. 3 is a signal timing diagram of an embodiment of the pixel driving circuit shown in FIG. 2;
  • FIG. 4 is a schematic flow chart of an embodiment of a driving method of a pixel driving circuit of the present application
  • FIG. 5 is a schematic structural view of an embodiment of a display panel of the present application.
  • FIG. 1 is a schematic diagram showing the circuit structure of an embodiment of a pixel driving circuit of the present application.
  • the pixel driving circuit of this embodiment includes a first switching transistor T 1 , a first capacitor Cs 1 , a second switching transistor T 2 , a second capacitor Cs 2 , a third switching transistor T 3 , and a light emitting device OLED.
  • the control end of the first switch T 1 is connected to the first control signal G 1 , that is, connected to the first drive line Gate 1 ; the input end is connected to the data signal V data , that is, connected to the data line Data; a first terminal of a capacitor Cs and a third switch control terminal T 3 of the tube.
  • the control end of the second switch tube T 2 is connected to the second control signal G 2 and is connected to the second drive line Gate 2; the input end is connected to the data signal V data , that is, connected to the data line Data; the output end is electrically connected to the first capacitor Cs The second end of 1 and the first end of the second capacitor Cs 2 .
  • the input end of the third switch T 3 is connected to the power positive voltage V DD , and the output end is electrically connected to the second end of the second capacitor Cs 2 and the first end of the light emitting device OLED.
  • the second end of the light emitting device OLED is electrically connected to the power supply negative voltage V SS .
  • the capacitive coupling characteristics of the first capacitor Cs 1 and the second capacitor Cs 2 are utilized to improve the actual operation of the light emitting device OLED. Drive voltage.
  • the first switch tube T 1 is turned on, the second switch tube T 2 is turned off, the voltage at the point P 1 is V data , and the voltage at the point P 2 is Then controls the first switching transistor T 1 is turned off, the second switching transistor T 2 is turned on, at this time since the second capacitance Cs of the capacitive coupling characteristics of the first capacitor Cs. 1 and 2, so that the voltage at the lift P 1 is Finally, the first switch tube T 1 is turned off, and the second switch tube T 2 is turned off. At this time, the OLED is lit and the driving voltage is
  • the driving circuit of the embodiment can increase the actual input driving voltage, and the driving of the light emitting device can be realized by using a smaller input driving voltage, thereby correspondingly improving the accuracy of the actual driving voltage and reducing the power consumption.
  • FIG. 2 is a schematic circuit diagram of another embodiment of the pixel driving circuit of the present application.
  • the pixel driving circuit of this embodiment is similar to the embodiment shown in FIG. 1 , and includes a first switching transistor T 1 , a first capacitor Cs 1 , a second switching transistor T 2 , a second capacitor Cs 2 , a third switching transistor T 3 , and
  • the OLED of the OLED device is similar to the embodiment shown in FIG. 1 and will not be described again.
  • the driving circuit further includes a fourth switching tube T 4 , the control end of the fourth switching tube is connected to the reference control signal G 3 , the input terminal is connected to the reference voltage V ref , and the reference voltage V ref is a constant voltage, and the output is The terminal is electrically connected to the second end of the second capacitor Cs 2 .
  • the first switching transistor T 1 , the second switching transistor T 2 , the third switching transistor T 3 , and the fourth switching transistor T 4 are thin film transistors, and the thin film transistor may be a low temperature polysilicon thin film transistor, an oxide.
  • an N-type thin film transistor is selected, which includes a gate, a source, and a drain, that is, a control terminal, an input terminal, and an output terminal respectively corresponding to the switching transistor, and the source of the transistor when the gate voltage is low. The drain and drain are turned off, and the source and drain of the transistor are turned on when the gate voltage is high.
  • FIG. 3 is a signal timing diagram of the embodiment of the pixel driving circuit shown in FIG. 2.
  • the V data signal is input, and the reference control signal G 3 is at a high potential, that is, the third switching transistor T 3 is kept turned on, and the voltage at Vs is set to V ref .
  • the first control signal G 1 is set to a high potential
  • the second control signal G 2 is set to a low potential
  • the corresponding first switch tube T 1 is turned on
  • the second switch tube T 2 is turned off
  • the voltage at the point P 1 is V data
  • the voltage at point P 2 is V data
  • the first control signal is set low potential G 1, G 2 of the second control signal is set high, the corresponding first switch transistor T 1 is turned off, the second switching transistor T 2 is turned on, when the voltage at the P 1 of uplifted
  • the first control signal G 1 , the second control signal G 2 , and the reference control signal G 3 are both set to a low potential, and the corresponding first switch tube T 1 , second switch tube T 2 , and third switch Tube T 3 is disconnected. At this point, the OLED lights up and the driving voltage is
  • the important influence factor on the driving voltage in the final result is the numerical ratio of the first capacitor Cs1 and the second capacitor Cs2, and the numerical ratio of the first capacitor Cs1 and the second capacitor Cs2 is increased, which can be greatly increased. Large actual drive voltage.
  • the range of the input driving voltage is reduced, and the fineness of the actual driving voltage is increased.
  • FIG. 4 is a schematic flowchart of a driving method of a pixel driving circuit of the present application.
  • the pixel driving circuit may refer to the circuit diagram shown in FIG. 1 or FIG. 2, and the method includes:
  • FIG. 5 is a schematic structural diagram of an embodiment of a display panel of the present application.
  • the display panel 50 includes the above-described pixel driving circuit, which may be the pixel driving circuit shown in FIGS. 1 and 2, and operates using the driving method shown in FIG.
  • the display panel of this embodiment includes the above-described pixel driving circuit.
  • the pixel driving circuit includes: a first switching tube, a second switching tube and a third switching tube, a first capacitor and a second capacitor, and a light emitting device; the control end of the first switching tube is connected to the first control signal, and the input end is connected a data signal, the output end is electrically connected to the first end of the first capacitor and the control end of the third switch tube; the control end of the second switch tube is connected to the second control signal, the input end is connected to the data signal, and the output end is electrically connected to the first end a second end of the capacitor and a first end of the second capacitor; a positive voltage of the input power of the third switch tube, the output end is electrically connected to the second end of the second capacitor and the first end of the light emitting device; the second end of the light emitting device is electrically Connect the negative voltage of the power supply.
  • the driving voltage can be greatly increased when the voltage modules are identical, and the input voltage range can be reduced

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Electroluminescent Light Sources (AREA)
  • Control Of El Displays (AREA)

Abstract

一种像素驱动电路、驱动方法及显示面板。驱动电路包括：第一开关管（T1）、第二开关管（T2）和第三开关管（T3），第一电容（Cs1）和第二电容（Cs2），以及发光器件（OLED）；第一开关管（T1）的控制端接入第一控制信号（G1），输入端接入数据信号，输出端电连接第一电容（Cs1）的第一端和第三开关管（T3）的控制端；第二开关管（T2）的控制端接入第二控制信号（G2），输入端接入数据信号（Vdata），输出端电连接第一电容（Cs1）的第二端和第二电容（Cs2）的第一端；第三开关管（T3）的输入端接入电源正电压（VDD），输出端电连接第二电容（Cs2）的第二端和发光器件（OLED）的第一端；发光器件（OLED）的第二端电连接电源负电压（VSS）。采用该驱动电路，能够减小输入驱动电压，提高实际驱动电压的精度。

Description

一种像素驱动电路、驱动方法及显示面板 技术领域
本发明涉及显示技术领域，特别是涉及一种像素驱动电路、驱动方法及显示面板。
背景技术
像素驱动电路能够用于为显示面板提供驱动电路，在显示技术领域，当前OLED以其色域广、对比度高、节能、可折叠性等特点，越来越被消费者认可，被广泛应用于各种场合。
以OLED为例，由于OLED本身的特性，其驱动电路需要能够提供精细的驱动电压。OLED现有的驱动电路均需要较大的输入驱动电压才能实现驱动，而输入驱动电压过大容易导致实际驱动电压的精度不便控制，同时造成OLED能耗较大的问题。
技术解决方案
本发明提供一种像素驱动电路、驱动方法及显示面板，以解决现有技术的像素驱动电路输入驱动电压范围过大所导致的实际驱动电压精度较低的问题。
为解决上述技术问题，本发明提出一种像素驱动电路。驱动电路包括：第一开关管、第二开关管和第三开关管，第一电容和第二电容，以及发光器件；第一开关管的控制端接入第一控制信号，输入端接入数据信号，输出端电连接第一电容的第一端和第三开关管的控制端；第二开关管的控制端接入第二控制信号，输入端接入数据信号，输出端电连接第一电容的第二端和第二电容的第一端；第三开关管的输入端接入电源正电压，输出端电连接第二电容的第二端和发光器件的第一端；发光器件的第二端电连接电源负电压。
为解决上述技术问题，本发明提出一种像素驱动电路的驱动方法。像素驱动电路是如上的像素驱动电路。驱动方法包括：在第一阶段，第一控制信号提供高电位，第一开关管导通，第二控制信号提供低电位，第二开关管截止；在第二阶段，第一控制信号提供低电位，第一开关管截止；第二控制信号提供高电位，第二开关管导通；在第三阶段，第一控制信号提供低电位，第一开关管截止；第二控制信号提供低电位，第二开关管截止。
为实现上述驱动方法，本申请提出一种显示面板。该显示面板包括如上的 像素驱动电路。
本申请的像素驱动电路包括第一开关管、第二开关管和第三开关管，第一电容和第二电容，以及发光器件；第一开关管的控制端接入第一控制信号，输入端接入数据信号，输出端电连接第一电容的第一端和第三开关管的控制端；第二开关管的控制端接入第二控制信号，输入端接入数据信号，输出端电连接第一电容的第二端和第二电容的第一端；第三开关管的输入端接入电源正电压，输出端电连接第二电容的第二端和发光器件的第一端；发光器件的第二端电连接电源负电压。能够通过控制本申请像素驱动电路中的第一开关管和第二开关管的导通断开，并利用第一电容和第二电容的电容耦合特性来提升对发光器件的实际驱动电压。因而输入较小的驱动电压即可实现对发光器件的驱动，相应的可提高实际驱动电压精度，并减小能耗。
附图说明
图1是本申请像素驱动电路一实施例的电路结构示意图；
图2是本申请像素驱动电路另一实施例的电路结构示意图；
图3是图2所示像素驱动电路实施例的信号时序图；
图4是本申请像素驱动电路的驱动方法一实施例的流程示意图；
图5是本申请显示面板一实施例的结构示意图。
本发明的实施方式
为使本领域的技术人员更好地理解本发明的技术方案，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述。可以理解的是，此处所描述的具体实施例仅用于解释本发明，而非对本发明的限定。另外还需要说明的是，为了便于描述，附图中仅示出了与本发明相关的部分而非全部结构。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
请参阅图1，图1是本申请像素驱动电路一实施例的电路结构示意图。本实施例像素驱动电路包括第一开关管T1、第一电容Cs1、第二开关管T2、第二电容Cs2、第三开关管T3以及发光器件OLED。
其中，第一开关管T1的控制端接入第一控制信号G1，即连接到第一驱动线Gate1；输入端接入数据信号Vdata，即连接到数据线Data；输出端电连接第一电 容Cs1的第一端和第三开关管T3的控制端。
第二开关管T2的控制端接入第二控制信号G2，连接到第二驱动线Gate2；输入端接入数据信号Vdata，即连接到数据线Data；输出端电连接第一电容Cs1的第二端和第二电容Cs2的第一端。
第三开关管T3的输入端接入电源正电压VDD，输出端电连接第二电容Cs2的第二端和发光器件OLED的第一端。
发光器件OLED的第二端电连接电源负电压VSS。
本实施例中，通过控制第一开关管T1和第二开关管T2的导通断开，利用第一电容Cs1和第二电容Cs2的电容耦合特性以提升对发光器件OLED的实际驱动电压。
具体来说，首先控制第一开关管T1导通，第二开关管T2断开，P1点处的电压为Vdata，P2点处的电压为
Figure PCTCN2017117757-appb-000001
然后控制第一开关管T1断开，第二开关管T2导通，此时由于第一电容Cs1和第二电容Cs2的电容耦合特性，使得P1处的电压抬升为
Figure PCTCN2017117757-appb-000002
最后控制第一开关管T1断开，第二开关管T2断开，此时OLED亮起，驱动电压为
Figure PCTCN2017117757-appb-000003
由此在Cs2远大于Cs1时，实际驱动电压可提升一倍，还可根据Cs2和Cs1的电容比例，控制实际驱动电压Vs。基于以上描述可知，本实施例驱动电路能够提升实际入驱动电压，使用较小的输入驱动电压即可实现对发光器件的驱动，相应的可提高实际驱动电压的精度，并减小能耗。
还可参阅图2，图2是本申请像素驱动电路另一实施例的电路示意图。本实施例像素驱动电路与图1所示实施例类似，也包括第一开关管T1、第一电容Cs1、第二开关管T2、第二电容Cs2、第三开关管T3以及发光器件OLED，这些元件的连接方式与图1所示实施例类似，具体不再赘述。
在本实施例中驱动电路进一步包括第四开关管T4，第四开关管的控制端接入参考控制信号G3，输入端接入参考电压Vref，参考电压Vref为一恒定电压，输出端电连接第二电容Cs2的第二端。
在本实施例中，第一开关管他T1、第二开关管T2、第三开关管T3、第四开关管T4均为薄膜晶体管，薄膜晶体管可以是低温多晶硅薄膜晶体管、氧化物半导体薄膜晶体管或非晶硅薄膜晶体管。本实施例中，选用N型薄膜晶体管，其包括栅极、源极以及漏极，即分别对应开关管的控制端、输入端和输出端，在 栅极电压为低电平时，该晶体管的源极和漏极截止，在栅极电压为高电平时，该晶体管的源极和漏极导通。
对本实施例驱动电路的具体驱动方法，请参阅图3，图3是图2所示像素驱动电路实施例的信号时序图。
其中，数据信号Vdata由数据线提供，第一控制信号G1由第一驱动线Gate1提供，第二控制信号G2由第二驱动线Gate2提供，参考控制信号G3由一控制线提供。
在一个行驱动时间里，输入Vdata信号，参考控制信号G3为高电位，即第三开关管T3保持导通，Vs处电压置Vref。
首先第一控制信号G1置高电位，第二控制信号G2置低电位，相应的第一开关管T1导通，第二开关管T2断开，此时P1点处的电压为Vdata，P2点处的电压为
Figure PCTCN2017117757-appb-000004
然后第一控制信号G1置低电位，第二控制信号G2置高电位，相应的第一开关管T1断开，第二开关管T2导通，此时P1处的电压抬升为
Figure PCTCN2017117757-appb-000005
Figure PCTCN2017117757-appb-000006
一个行驱动时间完成后，第一控制信号G1，第二控制信号G2、参考控制信号G3均置低电位，相应的第一开关管T1、第二开关管T2、第三开关管T3均断开。此时OLED亮起，驱动电压为
Figure PCTCN2017117757-appb-000007
对于本实施例驱动电路，当Cs2＝2Cs1时，若输入驱动电压Vdata＝10V时，则可得到实际驱动电压为15V；当Cs2＝1000Cs1时，输入驱动电压等于10V，可以得到19.99V的实际驱动电压。
由上述计算可以知道，在最终的结果中对驱动电压的重要影响因素为第一电容Cs1和第二电容Cs2的数值比例，增大第一电容Cs1和第二电容Cs2的数值比例，可大幅增大实际驱动电压。同时，要得到一定数值的驱动电压，通过控制第一电容Cs1和第二电容Cs2的数值比例实现，减小了输入驱动电压的范围，增加实际驱动电压的精细度。
对于上述驱动电路，采用两个驱动线驱动一个OLED灯。具体过程请参阅图4，图4是本申请像素驱动电路的驱动方法一实施例的流程示意图，其中，该像素驱动电路可以参考图1或图2所示的电路图，该方法包括：
S41：在第一阶段，第一控制信号提供高电位，第一开关管导通，第二控制 信号提供低电位，第二开关管截止。
S42：在第二阶段，第一控制信号提供低电位，第一开关管截止，第二控制信号提供高电位，第二开关管导通。
S43：在第三阶段，第一控制信号提供低电位，第一开关管截止，第二控制信号提供低电位，第二开关管截止。
上述三个阶段的过程与图2所示实施例的驱动过程类似，具体不再赘述。
本申请还提出一种显示面板，请参阅图5，图5是本申请显示面板一实施例的结构示意图。该显示面板50包括上述的像素驱动电路，该像素驱动电路可以是图1及图2所示像素驱动电路，并采用图4所示的驱动方法工作。
本实施例显示面板包括上述的像素驱动电路。像素驱动电路包括：第一开关管、第二开关管和第三开关管，第一电容和第二电容，以及发光器件；第一开关管的控制端接入第一控制信号，输入端接入数据信号，输出端电连接第一电容的第一端和第三开关管的控制端；第二开关管的控制端接入第二控制信号，输入端接入数据信号，输出端电连接第一电容的第二端和第二电容的第一端；第三开关管的输入电源正电压，输出端电连接第二电容的第二端和发光器件的第一端；发光器件的第二端电连接电源负电压。采用该驱动电路，能够在电压模块一致的情况下，使驱动电压大幅增大，也可以减小输入电压范围，增加电压的精细度。本实施例显示面板能耗小，显示效果佳。
以上所述仅为本发明的实施方式，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (16)

  1. 一种像素驱动电路的驱动方法，其中，所述像素驱动电路包括：第一开关管、第二开关管和第三开关管，第一电容和第二电容，以及发光器件；
    所述第一开关管的控制端接入第一控制信号，输入端接入数据信号，输出端电连接所述第一电容的第一端和所述第三开关管的控制端；
    所述第二开关管的控制端接入第二控制信号，输入端接入数据信号，输出端电连接所述第一电容的第二端和所述第二电容的第一端；
    所述第三开关管的输入端接入电源正电压，输出端电连接所述第二电容的第二端和所述发光器件的第一端；
    所述发光器件的第二端电连接电源负电压；
    所述驱动方法包括：
    在第一阶段，所述第一控制信号提供高电位，所述第一开关管导通，所述第二控制信号提供低电位，所述第二开关管截止；
    在第二阶段，所述第一控制信号提供低电位，所述第一开关管截止，所述第二控制信号提供高电位，所述第二开关管导通；
    在第三阶段，所述第一控制信号提供低电位，所述第一开关管截止，所述第二控制信号提供低电位，所述第二开关管截止。
  2. 根据权利要求1所述的驱动方法，其中，所述像素驱动电路进一步包括第四开关管，所述第四开关管的控制端接入参考控制信号，输入端接入参考电压，输出端电连接所述第二电容的第二端；
    所述驱动方法进一步包括：
    在所述第一阶段和所述第二阶段，所述参考控制信号提供高电位，所述第四开关管导通；
    在所述第三阶段，所述参考控制信号提供低电位，所述第四开关管截止。
  3. 一种像素驱动电路，其中，所述驱动电路包括：第一开关管、第二开关管和第三开关管，第一电容和第二电容，以及发光器件；
    所述第一开关管的控制端接入第一控制信号，输入端接入数据信号，输出端电连接所述第一电容的第一端和所述第三开关管的控制端；
    所述第二开关管的控制端接入第二控制信号，输入端接入数据信号，输出 端电连接所述第一电容的第二端和所述第二电容的第一端；
    所述第三开关管的输入端接入电源正电压，输出端电连接所述第二电容的第二端和所述发光器件的第一端；
    所述发光器件的第二端电连接电源负电压。
  4. 根据权利要求3所述的像素驱动电路，其中，所述驱动电路进一步包括第四开关管；
    所述第四开关管的控制端接入参考控制信号，输入端接入参考电压，输出端电连接所述第二电容的第二端。
  5. 根据权利要求4所述的像素驱动电路，其中，所述第一开关管、第二开关管、第三开关管、第四开关管均为薄膜晶体管；所述控制端为栅极、所述输入端为源极，所述输出端为漏极。
  6. 根据权利要求5所述的像素驱动电路，其中，所述薄膜晶体管为低温多晶硅薄膜晶体管、氧化物半导体薄膜晶体管或非晶硅薄膜晶体管。
  7. 根据权利要求4所述的像素驱动电路，其中，所述参考电压为一恒定电压。
  8. 根据权利要求3所述的像素驱动电路，其中，所述第一电容的电容值小于第二电容的电容值。
  9. 根据权利要求3所述的像素驱动电路，其中，所述发光器件为发光二极管。
  10. 一种显示面板，其中，所述显示面板包括像素驱动电路；所述驱动电路包括：第一开关管、第二开关管和第三开关管，第一电容和第二电容，以及发光器件；
    所述第一开关管的控制端接入第一控制信号，输入端接入数据信号，输出端电连接所述第一电容的第一端和所述第三开关管的控制端；
    所述第二开关管的控制端接入第二控制信号，输入端接入数据信号，输出端电连接所述第一电容的第二端和所述第二电容的第一端；
    所述第三开关管的输入端接入电源正电压，输出端电连接所述第二电容的第二端和所述发光器件的第一端；
    所述发光器件的第二端电连接电源负电压。
  11. 根据权利要求10所述的显示面板，其中，所述驱动电路进一步包括第四开关管；
    所述所述第四开关管的控制端接入参考控制信号，输入端接入参考电压，输出端电连接所述第二电容的第二端。
  12. 根据权利要求11所述的显示面板，其中，所述第一开关管、第二开关管、第三开关管、第四开关管均为薄膜晶体管；所述控制端为栅极、所述输入端为源极，所述输出端为漏极。
  13. 根据权利要求12所述的显示面板，其中，所述薄膜晶体管为低温多晶硅薄膜晶体管、氧化物半导体薄膜晶体管或非晶硅薄膜晶体管。
  14. 根据权利要求11所述的显示面板，其中，所述参考电压为一恒定电压。
  15. 根据权利要求10所述的显示面板，其中，所述第一电容的电容值小于第二电容的电容值。
  16. 根据权利要求10所述的显示面板，其中，所述发光器件为发光二极管。
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