WO2017118161A1 - 像素电路、其驱动方法、显示面板及显示装置 - Google Patents

像素电路、其驱动方法、显示面板及显示装置 Download PDF

Info

Publication number
WO2017118161A1
WO2017118161A1 PCT/CN2016/102997 CN2016102997W WO2017118161A1 WO 2017118161 A1 WO2017118161 A1 WO 2017118161A1 CN 2016102997 W CN2016102997 W CN 2016102997W WO 2017118161 A1 WO2017118161 A1 WO 2017118161A1
Authority
WO
WIPO (PCT)
Prior art keywords
signal
node
control
input
emitting device
Prior art date
Application number
PCT/CN2016/102997
Other languages
English (en)
French (fr)
Inventor
王俪蓉
Original Assignee
京东方科技集团股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 京东方科技集团股份有限公司 filed Critical 京东方科技集团股份有限公司
Priority to US15/540,113 priority Critical patent/US9972245B2/en
Publication of WO2017118161A1 publication Critical patent/WO2017118161A1/zh

Links

Images

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
    • G09G3/3233—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the current through the light-emitting element
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • 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
    • G09G2300/0426—Layout of electrodes and connections
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G09G2300/0809—Several active elements per pixel in active matrix panels
    • G09G2300/0814—Several active elements per pixel in active matrix panels used for selection purposes, e.g. logical AND for partial update
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G09G2300/0809—Several active elements per pixel in active matrix panels
    • G09G2300/0842—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G09G2300/0809—Several active elements per pixel in active matrix panels
    • G09G2300/0842—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor
    • G09G2300/0861—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
    • G09G2300/0866—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 by means of changes in the pixel supply voltage
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0243—Details of the generation of driving signals
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0262—The addressing of the pixel, in a display other than an active matrix LCD, involving the control of two or more scan electrodes or two or more data electrodes, e.g. pixel voltage dependent on signals of two data electrodes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/08—Details of timing specific for flat panels, other than clock recovery
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/04—Maintaining the quality of display appearance
    • G09G2320/043—Preventing or counteracting the effects of ageing
    • G09G2320/045—Compensation of drifts in the characteristics of light emitting or modulating elements
    • 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 disclosure relates to the field of display technologies, and in particular, to a pixel circuit, a driving method thereof, a display panel, and a display device.
  • OLED Organic Light Emitting Diode
  • TFT LCD Thin Film Transistor Liquid Crystal Display
  • the general pixel compensation circuit complicates the pixel structure and increases power consumption.
  • Embodiments of the present disclosure provide a pixel circuit, a driving method thereof, a display panel, and a display device for reducing power consumption of a pixel circuit.
  • An embodiment of the present disclosure provides a pixel circuit, including: a selection module, a writing module, a driving module, and a light emitting device;
  • the first control end of the selection module is connected to the first node, the first input end is connected to the first power signal end, the second control end and the second input end are respectively connected to the second power signal end, the output end and the second end Nodes are connected to each other; the selection module is configured to output the signal of the first power signal end or the signal of the second power signal end to the second under the control of the first node and the second power signal end Node
  • a control end of the driving module is connected to the first node, an input end is connected to the second node, and an output end is connected to an input end of the light emitting device;
  • the driving module is used at the first node Controlling, by the signal input by the second node, driving the light emitting device to emit light;
  • the output end of the light emitting device is connected to the third power signal end;
  • the first control end of the writing module is configured to input a first control signal
  • the second control end is configured to input a second control signal
  • the first input end is connected to the data signal end
  • the second input end is connected to the reference signal end
  • a first output terminal is connected to the first node
  • a second output terminal is connected to an input end of the light emitting device
  • the writing module is configured to transmit the signal of the data signal end under the control of the first control signal Writing to the first node, initializing an input end of the light emitting device by a signal input by the reference signal terminal under the control of the second control signal.
  • the selecting module specifically includes: a first switching transistor and a second switching transistor; wherein
  • a gate of the first switching transistor is connected to the first node, a source is connected to the first power signal end, and a drain is connected to the second node;
  • the gate and the source of the second switching transistor are respectively connected to the second power signal terminal, and the drain is connected to the second node.
  • the writing module specifically includes: a data writing unit and an initializing unit;
  • the control end of the data writing unit is configured to input the first control signal, the input end is connected to the data signal end, and the output end is connected to the first node; the data writing unit is configured to be in the Writing a signal of the data signal end to the first node under control of a first control signal;
  • the control end of the initialization unit is configured to input the second control signal, the input end is connected to the reference signal end, the output end is connected to the input end of the light emitting device, and the initialization unit is used in the second
  • the input of the light-emitting device is initialized by a signal input from the reference signal terminal under the control of the control signal.
  • the data writing unit specifically includes: a third switching transistor;
  • the gate of the third switching transistor is configured to input the first control signal, the source is connected to the data signal end, and the drain is connected to the first node.
  • the The initialization unit specifically includes: a fourth switching transistor;
  • the gate of the fourth switching transistor is configured to input the second control signal, the source is connected to the reference signal end, and the drain is connected to the input end of the light emitting device.
  • the driving module specifically includes: a fifth switching transistor and a capacitor; wherein
  • a gate of the fifth switching transistor is connected to the first node, a drain is connected to the second node, and a source is connected to an input end of the light emitting device;
  • the capacitor is coupled between the first node and an input of the light emitting device.
  • An embodiment of the present disclosure provides a driving method of the above pixel circuit according to an embodiment of the present disclosure, including:
  • the writing module writes the signal of the data signal end to the first node under the control of the first control signal, and performs the input of the light emitting device through the signal input by the reference signal terminal under the control of the second control signal. initialization;
  • the selection module outputs the signal of the first power signal end or the signal of the second power signal end to the second node under the control of the first node and the second power signal end, and the driving module is at the first
  • the light-emitting device is driven to emit light by a signal input by the second node under the control of the node.
  • An embodiment of the present disclosure provides a display panel including the above pixel circuit provided by an embodiment of the present disclosure.
  • An embodiment of the present disclosure provides a display device including the above display panel provided by an embodiment of the present disclosure.
  • Embodiments of the present disclosure provide a pixel circuit, a driving method thereof, a display panel, and a display device, the pixel circuit including: a selection module, a writing module, a driving module, and a light emitting device; wherein the selecting module is used at the first node and Controlling, by the second power signal terminal, the signal of the first power signal end or the signal of the second power signal end to the second node; the driving module is configured to drive the light emitting device by the signal input by the second node under the control of the first node The illuminating; the writing module is configured to write the signal of the data signal end to the first node under the control of the first control signal, and initialize the input end of the illuminating device by the signal input by the reference signal end under the control of the second control signal . In this way, the signal of the first power signal end or the signal of the second power signal end can be output to the second node through the selection module, so that the driving module can drive the light emitting device to emit light through the signal
  • the power signal for driving the illumination of the light emitting device may be the signal of the first power signal end or the signal of the second power signal end.
  • the selection module outputs the signal of the first power signal end to the signal.
  • a second node driving the light emitting device to emit a signal of the first power signal end;
  • the selecting module inputs the signal of the second power signal end to the second node, thereby driving the light emitting device to emit light
  • the signal of the two power signal terminals can further realize the illumination of the light-emitting device by using the unused power signal under the high-brightness display screen and the low-brightness display screen, which is beneficial to improving the utilization of the power signal and reducing the power consumption of the pixel circuit, thereby Reduce the power consumption of the display panel.
  • FIG. 1 is a schematic structural diagram of a pixel circuit according to an embodiment of the present disclosure
  • FIG. 2 is a schematic structural diagram of a pixel circuit according to an embodiment of the present disclosure
  • FIG. 3 is a schematic diagram of input and output timing of a pixel circuit according to an embodiment of the present disclosure.
  • the embodiment of the present disclosure provides a pixel circuit, as shown in FIG. 1, which may include: a selection module 01, a writing module 02, a driving module 03, and a light emitting device OLED;
  • the first control terminal of the selection module 01 is connected to the first node P1, the first input terminal is connected to the first power signal terminal VDDH, the second control terminal and the second input terminal are connected to the second power signal terminal VDDL, and the output terminal and the The two nodes P2 are connected; the selection module 01 is configured to output the signal of the first power signal terminal VDDH or the signal of the second power signal terminal VDDL to the second node P2 under the control of the first node P1 and the second power signal terminal VDDL. ;
  • the control end of the driving module 03 is connected to the first node P1, the input end is connected to the second node P2, and the output end is connected to the input end of the light emitting device OLED; the driving module 03 is used to pass the control of the first section P1.
  • the signal input by the two-node P2 drives the light-emitting device OLED to emit light;
  • the output end of the light emitting device OLED is connected to the third power signal terminal VSS;
  • the first control end of the writing module 02 is for inputting the first control signal G1, the second control end is for inputting the second control signal G2, the first input end is connected with the data signal end Data, and the second input end is connected with The reference signal terminal Vs is connected, the first output terminal is connected to the first node P1, the second output terminal is connected to the input end of the light emitting device OLED, and the writing module 02 is configured to send the data signal terminal under the control of the first control signal G1.
  • the signal is written to the first node P1, and the input of the light-emitting device OLED is initialized by the signal input from the reference signal terminal Vs under the control of the second control signal G2.
  • the signal of the first power signal end or the signal of the second power signal end may be output to the second node by the selecting module, so that the driving module can drive the light emitting device to emit light through the signal input by the second node.
  • the power signal for driving the illumination of the light emitting device may be the signal of the first power signal end or the signal of the second power signal end.
  • the second node drives the light emitting device to emit a signal of the first power signal end; when the display picture is a low brightness picture, the selecting module outputs the signal of the second power signal end to the second node, thereby driving the light emitting device to emit light
  • the signal of the two power signal terminals can further realize the illumination of the light-emitting device by using the unused power signal under the high-brightness display screen and the low-brightness display screen, which is beneficial to improving the utilization of the power signal and reducing the power consumption of the pixel circuit, thereby Reduce the power consumption of the display panel.
  • the selection module 01 may specifically include: a first switching transistor T1 and a second switching transistor T2; wherein, the gate of the first switching transistor T1 The pole is connected to the first node P1, the source is connected to the first power signal terminal VDDH, and the drain is connected to the second node P2; the gate and the source of the second switching transistor T2 are respectively connected to the second power signal terminal VDDL, and the drain The pole is connected to the second node P2.
  • the second switching transistor is connected in the form of a diode, and the signal of the second power signal terminal (for example, the level provided by the second power signal terminal is VL) can be output to the second node, so the gate and the source of the first switching transistor
  • a switching transistor outputs a signal of the first power signal terminal (for example, a level provided by the first power signal terminal is VH) to the second node, thereby driving the power signal of the light emitting device to emit light as VH; when Va ⁇ VL ⁇ Vth, the first A switching transistor is turned off, the second switching transistor is turned on, and the second switching transistor that is turned on outputs the signal VL of the second power signal terminal to the second node, thereby driving the power signal of the light emitting device to be VL.
  • the writing module 02 may specifically include: a data writing unit 021 and an initializing unit 022; wherein, the control end of the data writing unit 021 For inputting the first control signal G1, the input terminal is connected to the data signal terminal Data, and the output terminal is connected to the first node P1; the data writing unit 021 is configured to signal the data signal terminal Data under the control of the first control signal G1.
  • the control terminal of the initialization unit 022 is for inputting the second control signal G2, the input terminal is connected to the reference signal terminal Vs, and the output terminal is connected to the input end of the light emitting device OLED; the initialization unit 022 is used for The input of the light-emitting device OLED is initialized by the signal input from the reference signal terminal Vs under the control of the two control signals G2.
  • the writing module may include a data writing unit and an initializing unit, and the data writing unit may write the signal of the data signal end to the first under the control of the first control signal.
  • the node, the initialization unit may initialize the input end of the light emitting device by the signal input from the reference signal terminal under the control of the second control signal.
  • the data writing unit 021 may specifically include: a third switching transistor T3; a gate of the third switching transistor T3 is used to input the first
  • the control signal G1 has a source connected to the data signal terminal Data and a drain connected to the first node P1.
  • the third switching transistor can be turned on under the control of the first control signal, and the turned-on third switching transistor turns on the data signal end and the first node, so that the signal of the data signal end can be output to the first node.
  • the initializing unit 022 may specifically include: a fourth switching transistor T4; and a gate of the fourth switching transistor T4 is configured to input a second control signal.
  • G2 the source is connected to the reference signal terminal Vs, and the drain is connected to the input end of the light emitting device OLED.
  • the fourth switching transistor can be turned on under the control of the second control signal, and the turned-on fourth switching transistor turns on the reference signal end and the input end of the light emitting device, so that the signal of the reference signal end can be output to the light emitting device.
  • the input end of the light-emitting device is initialized, so that the illuminator can be prevented from being in a forward-biased state for a long time, which is beneficial to slow down the aging speed of the light-emitting device.
  • the driving module 03 may specifically include: a fifth switching transistor T5 and a capacitor C; wherein, the gate and the fifth of the fifth switching transistor T5 One node P1 is connected, the drain is connected to the second node P2, and the source and the light are The input end of the device OLED is connected; the capacitor C is connected between the first node P1 and the input end of the light emitting device OLED.
  • the fifth switching transistor can be turned on under the control of the first node, and the fifth switching transistor that is turned on turns the second node and the input end of the light emitting device, and can further drive the light through the power signal input by the second node. The device emits light.
  • the switching transistor mentioned in the above embodiments of the present disclosure may be a thin film transistor (TFT) or a metal oxide semiconductor field effect transistor (MOS) (Metal Oxide Scmiconductor), which is not limited herein. .
  • TFT thin film transistor
  • MOS metal oxide semiconductor field effect transistor
  • the sources and drains of these transistors can be interchanged without specific distinction.
  • a thin film transistor will be described as an example in describing a specific embodiment.
  • the working process of the pixel circuit provided by the embodiment of the present disclosure is described in detail below in conjunction with the pixel circuit and the operation timing provided by the embodiment of the present disclosure.
  • the working process of the pixel circuit provided by the embodiment of the present disclosure is described by taking the pixel circuit shown in FIG. 2 and the input/output timing chart of FIG. 2 as an example. Specifically, two stages t1 to t2 in the input/output timing chart shown in FIG. 3 are selected. In the following description, a high level signal is indicated by 1 and a low level signal is indicated by 0.
  • the third switching transistor T3 and the fourth switching transistor T4 are turned on; the turned-on third switching transistor T3 turns on the data signal terminal Data and the first node P1, so the data signal terminal is turned on.
  • the data input signal Vdata is output to the first node P1; the turned-on fourth switching transistor T4 turns on the reference signal terminal Vs and the input end of the light emitting device OLED, so the signal Vref of the reference signal terminal Vs is output to the input of the light emitting device OLED.
  • the light emitting device OLED is initialized; at this time, the voltage difference across the capacitor C is Vdata-Vref.
  • the t1 phase is the write phase.
  • K is a constant related to the process parameters and geometric dimensions of the fifth switching transistor T5
  • Vgs5 is the voltage difference between the gate and the source of the fifth switching transistor T5.
  • the current for driving the light emitting device OLED to emit light is independent of the signal Vss of the third power signal terminal VSS, so that the influence of the voltage drop of the third power signal terminal VSS on the light emitting brightness of the light emitting device can be eliminated, and the display of the display panel is improved.
  • the t2 phase is the illuminating phase.
  • the aspect ratio of the first switching transistor is larger than the aspect ratio of the second switching transistor, so the threshold voltage of the first switching transistor is smaller than the threshold voltage of the second switching transistor.
  • an embodiment of the present disclosure provides a driving method of the foregoing pixel circuit according to an embodiment of the present disclosure, which may specifically include:
  • the writing module writes the signal of the data signal end to the first node under the control of the first control signal, and initializes the input end of the light emitting device by the signal input by the reference signal terminal under the control of the second control signal.
  • the selection module outputs the signal of the first power signal end or the signal of the second power signal end to the second node under the control of the first node and the second power signal end, and the driving module passes under the control of the first node.
  • the signal input by the second node drives the light emitting device to emit light.
  • the writing of the data and the initialization of the input end of the light emitting device are completed in the writing phase, and the signal of the first power signal terminal or the second power signal is selected in the light emitting phase.
  • the signal of the terminal acts as a power signal for driving the illumination of the illumination device and outputs to the second node
  • the drive module drives the illumination device to emit light through the signal input by the second node under the control of the first node, thereby achieving high brightness display and Low brightness display
  • the unused power signals are used to drive the light-emitting device to emit light, which is beneficial to improving the utilization of the power signal and reducing the power consumption of the pixel circuit, thereby reducing the power consumption of the display panel.
  • an embodiment of the present disclosure provides a display panel including the above pixel circuit provided by an embodiment of the present disclosure. Since the principle of solving the problem of the display panel is similar to that of the pixel circuit, the implementation of the display panel can be referred to the implementation of the pixel circuit described above, and the repeated description is omitted.
  • an embodiment of the present disclosure provides a display device including the above display panel provided by an embodiment of the present disclosure.
  • the display device can be applied to any product or component having a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, and the like. Since the principle of solving the problem is similar to that of the display panel, the implementation of the display device can be referred to the implementation of the above display panel, and the repeated description is omitted.
  • Embodiments of the present disclosure provide a pixel circuit, a driving method thereof, a display panel, and a display device, the pixel circuit including: a selection module, a writing module, a driving module, and a light emitting device; wherein the selecting module is used at the first node and Controlling, by the second power signal end, outputting the signal of the first power signal end or the signal of the second power signal end to the second node; the driving module is configured to drive the light by the signal input by the second node under the control of the first node The device emits light; the writing module is configured to write the signal of the data signal end to the first node under the control of the first control signal, and control the input end of the light emitting device by the signal input by the reference signal terminal under the control of the second control signal initialization. In this way, the signal of the first power signal end or the signal of the second power signal end can be selected by the selection module to be output to the second node, so that the driving module can drive the light emitting device to emit light through the
  • the power signal for driving the illumination of the light emitting device may be the signal of the first power signal end or the signal of the second power signal end.
  • the selection module selects the signal output of the first power signal end. Going to the second node, driving the light emitting device to emit a signal of the first power signal end; when the display picture is a low brightness picture, the selecting module selects to input the signal of the second power signal end to the second node, thereby driving the light emitting device to emit light.

Abstract

一种像素电路、其驱动方法、显示面板及显示装置，该像素电路包括选择模块（01）、写入模块（02）、驱动模块（03）和发光器件（OLED），当需要显示高亮度画面时，选择模块（01）将第一电源信号端（VDDH）的信号（VH）输出到第二节点（P2），则驱动发光器件（OLED）发光的为第一电源信号端（VDDH）的信号（VH）；当显示画面为低亮度画面时，选择模块（01）将第二电源信号端（VDDL）的信号（VL）输入到第二节点（P2），从而驱动发光器件（OLED）发光的是第二电源信号端（VDDL）的信号（VL），进而可以实现在高亮度显示画面和低亮度显示画面下，分别采用不用的电源信号驱动发光器件（OLED）发光，这样有利于提升电源信号的利用率，降低像素电路的功耗，从而降低了显示面板的功耗。

Description

像素电路、其驱动方法、显示面板及显示装置 技术领域
本公开涉及显示技术领域，尤其涉及一种像素电路、其驱动方法、显示面板及显示装置。
背景技术
随着显示技术的进步，有机发光二极管(Organic Light Emitting Diode，OLED)显示器是当今平板显示器研究领域的热点之一，越来越多的有源矩阵有机发光二极管(Active Matrix Organic Light Emitting Diode，AMOLED)显示面板进入市场。相对于传统的薄膜晶体管液晶显示面板(Thin Film Transistor Liquid Crystal Display,TFT LCD)，AMOLED具有更快的反应速度，更高的对比度以及更广大的视角。
在AMOLED面板设计中，需要解决像素和像素之间的亮度非均匀性，已知可以用于实现补偿阈值电压非均匀性、漂移，从而解决各像素OLED发光非均匀性的像素结构有很多种，然而一般的像素补偿电路，都会使像素结构变得复杂，增加了功耗。
因此，如何降低像素电路的功耗，是本领域技术人员亟待解决的技术问题。
发明内容
本公开实施例提供了一种像素电路、其驱动方法、显示面板及显示装置，用以降低像素电路的功耗。
本公开实施例提供了一种像素电路，包括：选择模块、写入模块、驱动模块和发光器件；其中，
所述选择模块的第一控制端与第一节点相连，第一输入端与第一电源信号端相连，第二控制端和第二输入端分别与第二电源信号端相连，输出端与第二节点相连；所述选择模块用于在所述第一节点和所述第二电源信号端的控制下，将所述第一电源信号端的信号或所述第二电源信号端的信号输出到所述第二节点；
所述驱动模块的控制端与所述第一节点相连，输入端与所述第二节点相连，输出端与所述发光器件的输入端相连；所述驱动模块用于在所述第一节点的控制下，通过所述第二节点输入的信号驱动所述发光器件发光；
所述发光器件的输出端与第三电源信号端相连；
所述写入模块的第一控制端用于输入第一控制信号，第二控制端用于输入第二控制信号，第一输入端与数据信号端相连，第二输入端与参考信号端相连，第一输出端与所述第一节点相连，第二输出端与所述发光器件的输入端相连；所述写入模块用于在所述第一控制信号的控制下将所述数据信号端的信号写入到所述第一节点，在所述第二控制信号的控制下通过所述参考信号端输入的信号对所述发光器件的输入端进行初始化。
在一种可能的实施方式中，本公开实施例提供的上述像素电路中，所述选择模块，具体包括：第一开关晶体管和第二开关晶体管；其中，
所述第一开关晶体管的栅极与所述第一节点相连，源极与所述第一电源信号端相连，漏极与所述第二节点连接；
所述第二开关晶体管的栅极和源极分别与所述第二电源信号端相连，漏极与所述第二节点相连。
在一种可能的实施方式中，本公开实施例提供的上述像素电路中，所述写入模块，具体包括：数据写入单元和初始化单元；其中，
所述数据写入单元的控制端用于输入所述第一控制信号，输入端与所述数据信号端相连，输出端与所述第一节点相连；所述数据写入单元用于在所述第一控制信号的控制下将所述数据信号端的信号写入到所述第一节点；
所述初始化单元的控制端用于输入所述第二控制信号，输入端与所述参考信号端相连，输出端与所述发光器件的输入端相连；所述初始化单元用于在所述第二控制信号的控制下通过所述参考信号端输入的信号对所述发光器件的输入端进行初始化。
在一种可能的实施方式中，本公开实施例提供的上述像素电路中，所述数据写入单元，具体包括：第三开关晶体管；
所述第三开关晶体管的栅极用于输入所述第一控制信号，源极与所述数据信号端相连，漏极与所述第一节点相连。
在一种可能的实施方式中，本公开实施例提供的上述像素电路中，所述 初始化单元，具体包括：第四开关晶体管；
所述第四开关晶体管的栅极用于输入所述第二控制信号，源极与所述参考信号端相连，漏极与所述发光器件的输入端相连。
在一种可能的实施方式中，本公开实施例提供的上述像素电路中，所述驱动模块，具体包括：第五开关晶体管和电容；其中，
所述第五开关晶体管的栅极与所述第一节点相连，漏极与所述第二节点相连，源极与所述发光器件的输入端相连；
所述电容连接于所述第一节点和所述发光器件的输入端之间。
本公开实施例提供了一种本公开实施例提供的上述像素电路的驱动方法，包括：
在写入阶段，写入模块在第一控制信号的控制下将数据信号端的信号写入到第一节点，在第二控制信号的控制下通过参考信号端输入的信号对发光器件的输入端进行初始化；
在发光阶段，选择模块在所述第一节点和第二电源信号端的控制下，将第一电源信号端的信号或所述第二电源信号端的信号输出到第二节点，驱动模块在所述第一节点的控制下，通过所述第二节点输入的信号驱动所述发光器件发光。
本公开实施例提供了一种显示面板，包括本公开实施例提供的上述像素电路。
本公开实施例提供了一种显示装置，包括本公开实施例提供的上述显示面板。
本公开实施例提供了一种像素电路、其驱动方法、显示面板及显示装置，该像素电路包括：选择模块、写入模块、驱动模块和发光器件；其中，选择模块用于在第一节点和第二电源信号端的控制下，将第一电源信号端的信号或第二电源信号端的信号输出到第二节点；驱动模块用于在第一节点的控制下，通过第二节点输入的信号驱动发光器件发光；写入模块用于在第一控制信号的控制下将数据信号端的信号写入到第一节点，在第二控制信号的控制下通过参考信号端输入的信号对发光器件的输入端进行初始化。这样可以通过选择模块将第一电源信号端的信号或第二电源信号端的信号输出到第二节点，从而驱动模块可以通过第二节点输入的信号驱动发光器件发光。
具体地，用于驱动发光器件发光的电源信号可以是第一电源信号端的信号，也可以是第二电源信号端的信号，当需要显示高亮度画面时，选择模块将第一电源信号端的信号输出到第二节点，则驱动发光器件发光的为第一电源信号端的信号；当显示画面为低亮度画面时，选择模块将第二电源信号端的信号输入到第二节点，从而驱动发光器件发光的是第二电源信号端的信号，进而可以实现在高亮度显示画面和低亮度显示画面下，分别采用不用的电源信号驱动发光器件发光，这样有利于提升电源信号的利用率，降低像素电路的功耗，从而降低了显示面板的功耗。
附图说明
图1为本公开实施例提供的像素电路的结构示意图；
图2为本公开实施例提供的像素电路的具体结构示意图；
图3为本公开实施例提供的像素电路的输入输出时序示意图。
具体实施方式
下面结合附图，对本公开实施例提供的像素电路、其驱动方法、显示面板及显示装置的具体实施方式进行详细地说明。
本公开实施例提供了一种像素电路，如图1所示，可以包括：选择模块01、写入模块02、驱动模块03和发光器件OLED；其中，
选择模块01的第一控制端与第一节点P1相连，第一输入端与第一电源信号端VDDH相连，第二控制端和第二输入端与第二电源信号端VDDL相连，输出端与第二节点P2相连；选择模块01用于在第一节点P1和第二电源信号端VDDL的控制下，将第一电源信号端VDDH的信号或第二电源信号端VDDL的信号输出到第二节点P2；
驱动模块03的控制端与第一节点P1相连，输入端与第二节点P2相连，输出端与发光器件OLED的输入端相连；驱动模块03用于在第一节P1点的控制下，通过第二节点P2输入的信号驱动发光器件OLED发光；
发光器件OLED的输出端与第三电源信号端VSS相连；
写入模块02的第一控制端用于输入第一控制信号G1，第二控制端用于输入第二控制信号G2，第一输入端与数据信号端Data相连，第二输入端与 参考信号端Vs相连，第一输出端与第一节点P1相连，第二输出端与发光器件OLED的输入端相连；写入模块02用于在第一控制信号G1的控制下将数据信号端Data的信号写入到第一节点P1，在第二控制信号G2的控制下通过参考信号端Vs输入的信号对发光器件OLED的输入端进行初始化。
本公开实施例提供的上述像素电路，可以通过选择模块将第一电源信号端的信号或第二电源信号端的信号输出到第二节点，从而驱动模块可以通过第二节点输入的信号驱动发光器件发光。具体地，用于驱动发光器件发光的电源信号可以是第一电源信号端的信号，也可以是第二电源信号端的信号，当需要显示高亮度画面时，选择模块将第一电源信号端的信号输出到第二节点，则驱动发光器件发光的为第一电源信号端的信号；当显示画面为低亮度画面时，选择模块将第二电源信号端的信号输出到第二节点，从而驱动发光器件发光的是第二电源信号端的信号，进而可以实现在高亮度显示画面和低亮度显示画面下，分别采用不用的电源信号驱动发光器件发光，这样有利于提升电源信号的利用率，降低像素电路的功耗，从而降低了显示面板的功耗。
在具体实施时，本公开实施例提供的上述像素电路中，如图2所示，选择模块01可以具体包括：第一开关晶体管T1和第二开关晶体管T2；其中，第一开关晶体管T1的栅极与第一节点P1相连，源极与第一电源信号端VDDH相连，漏极与第二节点P2连接；第二开关晶体管T2的栅极和源极分别与第二电源信号端VDDL相连，漏极与第二节点P2相连。
具体地，本公开实施例提供的上述像素电路中，第一节点有信号输入时，令第一节点的电位为Va，由于第二开关晶体管的栅极与源极均与第二电源信号端相连，因此第二开关晶体管以二极管的形式连接，可以将第二电源信号端的信号(例如第二电源信号端提供的电平为VL)输出到第二节点，因此第一开关晶体管的栅极与源极之间的电压差Vgs＝Va-VL，当Va–VL>Vth(Vth为第一开关晶体管的阈值电压)时，第一开关晶体管导通，第二开关晶体管反向截止，导通的第一开关晶体管将第一电源信号端的信号(例如第一电源信号端提供的电平为VH)输出到第二节点，从而驱动发光器件发光的电源信号为VH；当Va–VL<Vth时，第一开关晶体管截止，第二开关晶体管导通，导通的第二开关晶体管将第二电源信号端的信号VL输出到第二节点，从而驱动发光器件发光的电源信号为VL。
在具体实施时，本公开实施例提供的上述像素电路中，如图2所示，写入模块02可以具体包括：数据写入单元021和初始化单元022；其中，数据写入单元021的控制端用于输入第一控制信号G1，输入端与数据信号端Data相连，输出端与第一节点P1相连；数据写入单元021用于在第一控制信号G1的控制下将数据信号端Data的信号写入到第一节点P1；初始化单元022的控制端用于输入第二控制信号G2，输入端与参考信号端Vs相连，输出端与发光器件OLED的输入端相连；初始化单元022用于在第二控制信号G2的控制下通过参考信号端Vs输入的信号对发光器件OLED的输入端进行初始化。
具体地，本公开实施例提供的上述像素电路中，写入模块可以包括数据写入单元和初始化单元，数据写入单元可以在第一控制信号的控制下将数据信号端的信号写入到第一节点，初始化单元可以在第二控制信号的控制下通过参考信号端输入的信号对发光器件的输入端进行初始化。
在具体实施时，本公开实施例提供的上述像素电路中，如图2所示，数据写入单元021可以具体包括：第三开关晶体管T3；第三开关晶体管T3的栅极用于输入第一控制信号G1，源极与数据信号端Data相连，漏极与第一节点P1相连。具体地，第三开关晶体管可以在第一控制信号的控制下导通，导通的第三开关晶体管将数据信号端与第一节点导通，进而可以将数据信号端的信号输出到第一节点。
在具体实施时，本公开实施例提供的上述像素电路中，如图2所示，初始化单元022可以具体包括：第四开关晶体管T4；第四开关晶体管T4的栅极用于输入第二控制信号G2，源极与参考信号端Vs相连，漏极与发光器件OLED的输入端相连。具体地，第四开关晶体管可以在第二控制信号的控制下导通，导通的第四开关晶体管将参考信号端与发光器件的输入端导通，进而可以将参考信号端的信号输出到发光器件的输入端，对发光器件的输入端进行初始化，这样可以防止发光器长时间处于正偏状态，有利于减缓发光器件的老化速度。
在具体实施时，本公开实施例提供的上述像素电路中，如图2所示，驱动模块03可以具体包括：第五开关晶体管T5和电容C；其中，第五开关晶体管T5的栅极与第一节点P1相连，漏极与第二节点P2相连，源极与发光 器件OLED的输入端相连；电容C连接于第一节点P1和发光器件OLED的输入端之间。具体地，第五开关晶体管可以在第一节点的控制下导通，导通的第五开关晶体管将第二节点与发光器件的输入端导通，进而可以通过第二节点输入的电源信号驱动发光器件发光。
需要说明的是本公开上述实施例中提到的开关晶体管可以是薄膜晶体管(TFT，Thin Film Transistor)，也可以是金属氧化物半导体场效应管(MOS，Metal Oxide Scmiconductor)，在此不做限定。在具体实施中，这些晶体管的源极和漏极可以互换，不做具体区分。在描述具体实施例时以薄膜晶体管为例进行说明。
下面结合本公开实施例提供的像素电路和工作时序对本公开实施例提供的像素电路的工作过程进行详细描述。以如图2所示的像素电路以及图3所示的图2的输入输出时序图为例，对本公开实施例提供的像素电路的工作过程作以描述。具体地，选取如图3所示的输入输出时序图中的t1～t2两个阶段。下述描述中以1表示高电平信号，0表示低电平信号。
在t1阶段，G1＝1，G2＝1，Data＝Vdata，Vs＝Vref，VDDH＝VH，VDDL＝VL。由于G1＝1和G2＝1，因此第三开关晶体管T3和第四开关晶体管T4导通；导通的第三开关晶体管T3将数据信号端Data与第一节点P1导通，因此将数据信号端Data输入的信号Vdata输出到第一节点P1；导通的第四开关晶体管T4将参考信号端Vs与发光器件OLED的输入端导通，因此参考信号端Vs的信号Vref输出到发光器件OLED的输入端，对发光器件OLED进行初始化；此时电容C两端的电压差为Vdata-Vref。t1阶段为写入阶段。
在t2阶段，G1＝0，G2＝0，Data＝Vdata，Vs＝Vref，VDDH＝VH，VDDL＝VL。由于G1＝0和G2＝0，因此第三开关晶体管T3和第四开关晶体管T4截止；发光器件OLED进入发光阶段，发光器件OLED的输入端的电位由Vref变为Vo+Vss，其中Vo为发光器件OLED的阈值电压，Vss为第三电源信号端VSS的电位；由于电容C的耦合效应，因此电容C另一端的电位即第一节点P1的电位被拉升至Vdata-Vref+Vo+Vss，此时第一开关晶体管T1的Vgs＝Vdata-Vref+Vo+Vss-VL；当显示画面为高亮度画面时，即数据信号端Data输入的信号Vdata较大(也可以设定一个预设数值Vm，即Vdata>Vm)时，第一开关晶体管T1的Vgs＝Vdata-Vref+Vo+Vss-VL>Vth，因此第一开关晶体 管T1导通，导通的第一开关晶体管T1将第一电源信号端VDDH的信号VH输出到第二节点P2，第二开关晶体管T2反向截止，因此驱动发光器件OLED发光的电源信号为第一电源信号端VDDH的信号VH；当显示画面为低亮度画面时，即数据信号端Data输入的信号Vdata较小(即Vdata<Vm)时，第一开关晶体管T1的Vgs＝Vdata-Vref+Vo+Vss-VL<Vth，因此第一开关晶体管T1截止，此时以二极管连接方式连接的第二开关晶体管T2将第二电源信号端VDDL的信号VL输出到第二节点P2，因此驱动发光器件OLED发光的电源信号为第二电源信号端VDDL的信号VL。此时第五开关晶体管T5的Vgs5＝Vdata-Vref+Vo+Vss–Vo-Vss＝Vdata-Vref，驱动发光器件OLED发光的电流为I＝K(Vgs5-Vth)2＝K(Vdata-Vref-Vth)2，其中，K是与第五开关晶体管T5的工艺参数和几何尺寸有关的常数，Vgs5为第五开关晶体管T5的栅极和源极之间的电压差。由此可以看出驱动发光器件OLED发光的电流与第三电源信号端VSS的信号Vss无关，因此可以消除第三电源信号端VSS的电压降对发光器件发光亮度的影响，提高了显示面板的显示均匀性。t2阶段为发光阶段。
需要说明的是，第一开关晶体管的宽长比要比第二开关晶体管的宽长比大，因此第一开关晶体管的阈值电压小于第二开关晶体管的阈值电压。
基于同一发明构思，本公开实施例提供了一种本公开实施例提供的上述像素电路的驱动方法，可以具体包括：
写入阶段，写入模块在第一控制信号的控制下将数据信号端的信号写入到第一节点，在第二控制信号的控制下通过参考信号端输入的信号对发光器件的输入端进行初始化；
在发光阶段，选择模块在第一节点和第二电源信号端的控制下，将第一电源信号端的信号或第二电源信号端的信号输出到第二节点，驱动模块在第一节点的控制下，通过第二节点输入的信号驱动发光器件发光。
具体地，本公开实施例提供的上述像素电路的驱动方法中，在写入阶段完成了数据的写入和发光器件输入端的初始化，在发光阶段实现选择第一电源信号端的信号或第二电源信号端的信号，作为驱动发光器件发光的电源信号并输出到第二节点，进而驱动模块在第一节点的控制下，通过第二节点输入的信号驱动发光器件发光，进而可以实现在高亮度显示画面和低亮度显示 画面下，分别采用不用的电源信号驱动发光器件发光，这样有利于提升电源信号的利用率，降低像素电路的功耗，从而降低了显示面板的功耗。
基于同一发明构思，本公开实施例提供了一种显示面板，包括本公开实施例提供的上述像素电路。由于该显示面板解决问题的原理与像素电路相似，因此该显示面板的实施可以参见上述像素电路的实施，重复之处不再赘述。
基于同一发明构思，本公开实施例提供了一种显示装置，包括本公开实施例提供的上述显示面板。该显示装置可以应用于手机、平板电脑、电视机、显示器、笔记本电脑、数码相框、导航仪等任何具有显示功能的产品或部件。由于该显示装置解决问题的原理与显示面板相似，因此该显示装置的实施可以参见上述显示面板的实施，重复之处不再赘述。
本公开实施例提供了一种像素电路、其驱动方法、显示面板及显示装置，该像素电路包括：选择模块、写入模块、驱动模块和发光器件；其中，选择模块用于在第一节点和第二电源信号端的控制下，选择将第一电源信号端的信号或第二电源信号端的信号输出到第二节点；驱动模块用于在第一节点的控制下，通过第二节点输入的信号驱动发光器件发光；写入模块用于在第一控制信号的控制下将数据信号端的信号写入到第一节点，在第二控制信号的控制下通过参考信号端输入的信号对发光器件的输入端进行初始化。这样可以通过选择模块选择第一电源信号端的信号或第二电源信号端的信号输出到第二节点，从而驱动模块可以通过第二节点输入的信号驱动发光器件发光。
具体地，用于驱动发光器件发光的电源信号可以是第一电源信号端的信号，也可以是第二电源信号端的信号，当需要显示高亮度画面时，选择模块选择将第一电源信号端的信号输出到第二节点，则驱动发光器件发光的为第一电源信号端的信号；当显示画面为低亮度画面时，选择模块选择将第二电源信号端的信号输入到第二节点，从而驱动发光器件发光的是第二电源信号端的信号，进而可以实现在高亮度显示画面和低亮度显示画面下，分别采用不用的电源信号驱动发光器件发光，这样有利于提升电源信号的利用率，降低像素电路的功耗，从而降低了显示面板的功耗。
显然，本领域的技术人员可以对本公开进行各种改动和变型而不脱离本公开的精神和范围。这样，倘若本公开的这些修改和变型属于本公开权利要求及其等同技术的范围之内，则本公开也意图包含这些改动和变型在内。
本申请要求于2016年1月5日递交的中国专利申请第201610005980.3号的优先权，在此全文引用上述中国专利申请公开的内容以作为本申请的一部分。

Claims (9)

  1. 一种像素电路，包括：选择模块、写入模块、驱动模块和发光器件；其中，
    所述选择模块的第一控制端与第一节点相连，第一输入端与第一电源信号端相连，第二控制端和第二输入端与第二电源信号端相连，输出端与第二节点相连；所述选择模块被配置为在所述第一节点和所述第二电源信号端的控制下，选择所述第一电源信号端的信号或所述第二电源信号端的信号输出到所述第二节点；
    所述驱动模块的控制端与所述第一节点相连，输入端与所述第二节点相连，输出端与所述发光器件的输入端相连；所述驱动模块被配置为在所述第一节点的控制下，通过所述第二节点输入的信号驱动所述发光器件发光；
    所述发光器件的输出端与第三电源信号端相连；
    所述写入模块的第一控制端用于输入第一控制信号，第二控制端用于输入第二控制信号，第一输入端与数据信号端相连，第二输入端与参考信号端相连，第一输出端与所述第一节点相连，第二输出端与所述发光器件的输入端相连；所述写入模块被配置为在所述第一控制信号的控制下将所述数据信号端的信号写入到所述第一节点，在所述第二控制信号的控制下通过所述参考信号端输入的信号对所述发光器件的输入端进行初始化。
  2. 如权利要求1所述的像素电路，其中，所述选择模块包括：第一开关晶体管和第二开关晶体管；其中，
    所述第一开关晶体管的栅极与所述第一节点相连，源极与所述第一电源信号端相连，漏极与所述第二节点连接；
    所述第二开关晶体管的栅极和源极与所述第二电源信号端相连，漏极与所述第二节点相连。
  3. 如权利要求1或2所述的像素电路，其中，所述写入模块包括：数据写入单元和初始化单元；其中，
    所述数据写入单元的控制端用于输入所述第一控制信号，输入端与所述数据信号端相连，输出端与所述第一节点相连；所述数据写入单元被配置为 在所述第一控制信号的控制下将所述数据信号端的信号写入到所述第一节点；
    所述初始化单元的控制端用于输入所述第二控制信号，输入端与所述参考信号端相连，输出端与所述发光器件的输入端相连；所述初始化单元被配置为在所述第二控制信号的控制下通过所述参考信号端输入的信号对所述发光器件的输入端进行初始化。
  4. 如权利要求3所述的像素电路，其中，所述数据写入单元包括：第三开关晶体管；
    所述第三开关晶体管的栅极用于接收所述第一控制信号，源极与所述数据信号端相连，漏极与所述第一节点相连。
  5. 如权利要求3或4所述的像素电路，其中，所述初始化单元包括：第四开关晶体管；
    所述第四开关晶体管的栅极用于接收所述第二控制信号，源极与所述参考信号端相连，漏极与所述发光器件的输入端相连。
  6. 如权利要求1-5任一项所述的像素电路，其中，所述驱动模块包括：第五开关晶体管和电容；其中，
    所述第五开关晶体管的栅极与所述第一节点相连，漏极与所述第二节点相连，源极与所述发光器件的输入端相连；
    所述电容连接于所述第一节点和所述发光器件的输入端之间。
  7. 一种如权利要求1-6任一项所述的像素电路的驱动方法，包括：
    在写入阶段，写入模块在第一控制信号的控制下将数据信号端的信号写入到第一节点，在第二控制信号的控制下通过参考信号端输入的信号对发光器件的输入端进行初始化；
    在发光阶段，选择模块在所述第一节点和第二电源信号端的控制下，将第一电源信号端的信号或所述第二电源信号端的信号输出到第二节点，驱动模块在所述第一节点的控制下，通过所述第二节点输入的信号驱动所述发光器件发光。
  8. 一种显示面板，包括如权利要求1-6任一项所述的像素电路。
  9. 一种显示装置，包括如权利要求8所述的显示面板。
PCT/CN2016/102997 2016-01-05 2016-10-24 像素电路、其驱动方法、显示面板及显示装置 WO2017118161A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US15/540,113 US9972245B2 (en) 2016-01-05 2016-10-24 Pixel circuit, driving method for the pixel circuit, display panel, and display device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201610005980.3A CN105405399B (zh) 2016-01-05 2016-01-05 一种像素电路、其驱动方法、显示面板及显示装置
CN201610005980.3 2016-01-05

Publications (1)

Publication Number Publication Date
WO2017118161A1 true WO2017118161A1 (zh) 2017-07-13

Family

ID=55470854

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2016/102997 WO2017118161A1 (zh) 2016-01-05 2016-10-24 像素电路、其驱动方法、显示面板及显示装置

Country Status (3)

Country Link
US (1) US9972245B2 (zh)
CN (1) CN105405399B (zh)
WO (1) WO2017118161A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9972245B2 (en) 2016-01-05 2018-05-15 Boe Technology Group Co., Ltd. Pixel circuit, driving method for the pixel circuit, display panel, and display device

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105976788B (zh) * 2016-07-22 2018-11-06 京东方科技集团股份有限公司 一种像素电路及其驱动方法、显示面板和显示装置
KR102585451B1 (ko) * 2016-12-27 2023-10-06 삼성디스플레이 주식회사 발광 표시 장치
CN107393475A (zh) 2017-08-10 2017-11-24 京东方科技集团股份有限公司 像素驱动电路、像素驱动方法和显示装置
CN108510946B (zh) * 2018-04-19 2019-12-31 京东方科技集团股份有限公司 像素电路、显示面板和显示装置
CN110021262B (zh) * 2018-07-04 2020-12-18 京东方科技集团股份有限公司 像素电路及其驱动方法、像素单元、显示面板
CN110634432B (zh) * 2019-10-25 2023-05-12 京东方科技集团股份有限公司 Oled像素电路、驱动方法、老化检测方法和显示面板
CN111341258B (zh) * 2020-03-25 2021-04-02 上海天马有机发光显示技术有限公司 像素驱动电路及其驱动方法和显示装置
CN111445857B (zh) 2020-04-17 2021-05-14 上海天马有机发光显示技术有限公司 像素驱动电路及其驱动方法和显示装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101019166A (zh) * 2004-08-21 2007-08-15 周庆盈 发光装置显示器电路及其驱动方法
US20140320476A1 (en) * 2013-04-30 2014-10-30 Samsung Display Co., Ltd. Pixel and organic light emitting display device using the same
CN104715726A (zh) * 2015-04-07 2015-06-17 合肥鑫晟光电科技有限公司 像素驱动电路、像素驱动方法和显示装置
CN104809989A (zh) * 2015-05-22 2015-07-29 京东方科技集团股份有限公司 一种像素电路、其驱动方法及相关装置
WO2015183523A1 (en) * 2014-05-30 2015-12-03 Qualcomm Mems Technologies, Inc. Robust driver with multi-level output
CN105405399A (zh) * 2016-01-05 2016-03-16 京东方科技集团股份有限公司 一种像素电路、其驱动方法、显示面板及显示装置

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7256758B2 (en) 2003-06-02 2007-08-14 Au Optronics Corporation Apparatus and method of AC driving OLED
JP2007108381A (ja) 2005-10-13 2007-04-26 Sony Corp 表示装置および表示装置の駆動方法
KR100967142B1 (ko) * 2006-08-01 2010-07-06 가시오게산키 가부시키가이샤 표시구동장치 및 표시장치
US8077118B2 (en) * 2008-03-28 2011-12-13 Casio Computer Co., Ltd. Display apparatus and driving method thereof
TWI425472B (zh) * 2011-11-18 2014-02-01 Au Optronics Corp 像素電路及其驅動方法
KR20140000075A (ko) * 2012-06-22 2014-01-02 삼성디스플레이 주식회사 파워 유닛 및 이를 구비하는 유기 발광 표시 장치
CN103268749B (zh) * 2012-11-21 2015-04-15 上海天马微电子有限公司 一种反相器、amoled补偿电路和显示面板

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101019166A (zh) * 2004-08-21 2007-08-15 周庆盈 发光装置显示器电路及其驱动方法
US20140320476A1 (en) * 2013-04-30 2014-10-30 Samsung Display Co., Ltd. Pixel and organic light emitting display device using the same
WO2015183523A1 (en) * 2014-05-30 2015-12-03 Qualcomm Mems Technologies, Inc. Robust driver with multi-level output
CN104715726A (zh) * 2015-04-07 2015-06-17 合肥鑫晟光电科技有限公司 像素驱动电路、像素驱动方法和显示装置
CN104809989A (zh) * 2015-05-22 2015-07-29 京东方科技集团股份有限公司 一种像素电路、其驱动方法及相关装置
CN105405399A (zh) * 2016-01-05 2016-03-16 京东方科技集团股份有限公司 一种像素电路、其驱动方法、显示面板及显示装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9972245B2 (en) 2016-01-05 2018-05-15 Boe Technology Group Co., Ltd. Pixel circuit, driving method for the pixel circuit, display panel, and display device

Also Published As

Publication number Publication date
CN105405399B (zh) 2019-07-05
CN105405399A (zh) 2016-03-16
US20180005570A1 (en) 2018-01-04
US9972245B2 (en) 2018-05-15

Similar Documents

Publication Publication Date Title
WO2017118161A1 (zh) 像素电路、其驱动方法、显示面板及显示装置
US10497323B2 (en) Pixel circuit, method for driving the same, display panel and display device
CN108470539B (zh) 一种像素电路及其驱动方法、显示面板和显示装置
US10019949B2 (en) Shift register unit, gate driving circuit, display panel and display device
KR101788432B1 (ko) 픽셀 회로, 유기 전계 발광 표시 패널, 표시 장치 및 그 구동 방법
US9886898B2 (en) Pixel driving circuit, driving method for pixel driving circuit and display device
WO2018095031A1 (zh) 像素电路及其驱动方法、以及显示面板
WO2016101504A1 (zh) 一种像素电路、有机电致发光显示面板及显示装置
WO2016187990A1 (zh) 像素电路以及像素电路的驱动方法
CN107818759B (zh) 像素驱动电路及像素驱动方法、阵列基板以及显示装置
WO2016188367A1 (zh) 移位寄存器单元及其驱动方法、栅极驱动电路、显示装置
WO2016026218A1 (zh) 像素电路、有机电致发光显示面板及显示装置
WO2016045256A1 (zh) 像素电路及其发光器件驱动方法和有机电致发光显示面板
US9311849B2 (en) Inverter, AMOLED compensation circuit and display panel
WO2016155206A1 (zh) 像素电路及其驱动方法、阵列基板、显示装置
US20190304364A1 (en) Pixel compensation circuit, method for driving the same, display panel, and display device
WO2017121105A1 (zh) 一种像素电路、驱动方法、显示面板及显示装置
WO2018223694A1 (zh) 有机发光显示面板的补偿方法及相关装置
US9437142B2 (en) Pixel circuit and display apparatus
WO2016155161A1 (zh) Oeld像素电路、显示装置及控制方法
WO2015196730A1 (zh) 像素电路及其驱动方法和显示装置
JP2007316639A (ja) 画素およびディスプレイパネル
WO2014153806A1 (zh) 像素电路及其驱动方法、显示装置
WO2016187991A1 (zh) 像素电路、驱动方法、有机电致发光显示面板及显示装置
CN109949739B (zh) 一种像素电路、驱动方法及显示器

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 15540113

Country of ref document: US

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16883289

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 16883289

Country of ref document: EP

Kind code of ref document: A1

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM1205 DATED 03/07/2019)

122 Ep: pct application non-entry in european phase

Ref document number: 16883289

Country of ref document: EP

Kind code of ref document: A1