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WO2022267548A1 - 显示面板及其驱动方法、显示装置 - Google Patents

显示面板及其驱动方法、显示装置 Download PDF

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Publication number
WO2022267548A1
WO2022267548A1 PCT/CN2022/079579 CN2022079579W WO2022267548A1 WO 2022267548 A1 WO2022267548 A1 WO 2022267548A1 CN 2022079579 W CN2022079579 W CN 2022079579W WO 2022267548 A1 WO2022267548 A1 WO 2022267548A1
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WO
WIPO (PCT)
Prior art keywords
active
level
light
reset signal
levels
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2022/079579
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English (en)
French (fr)
Inventor
陈建宇
王仓鸿
龚旭
宋二龙
李春阳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BOE Technology Group Co Ltd
Mianyang BOE Optoelectronics Technology Co Ltd
Original Assignee
BOE Technology Group Co Ltd
Mianyang BOE Optoelectronics Technology Co Ltd
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.)
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Publication date
Application filed by BOE Technology Group Co Ltd, Mianyang BOE Optoelectronics Technology Co Ltd filed Critical BOE Technology Group Co Ltd
Priority to US18/570,649 priority Critical patent/US12283243B2/en
Publication of WO2022267548A1 publication Critical patent/WO2022267548A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • G09G3/2007—Display of intermediate tones
    • G09G3/2014—Display of intermediate tones by modulation of the duration of a single pulse during which the logic level remains constant
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/2007—Display of intermediate tones
    • G09G3/2018—Display of intermediate tones by time modulation using two or more time intervals
    • 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
    • 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
    • G09G2310/00—Command of the display device
    • G09G2310/06—Details of flat display driving waveforms
    • G09G2310/061—Details of flat display driving waveforms for resetting or blanking
    • 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
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G09G2320/064—Adjustment of display parameters for control of overall brightness by time modulation of the brightness of the illumination source

Definitions

  • the present disclosure relates to the field of display technology, and in particular, to a display panel, a driving method thereof, and a display device.
  • OLED display panel is an important display device, which has been widely used in the fields of mobile phones, vehicles, monitors, televisions and public displays, and the market demand for OLED display panels is also increasing. However, the higher the resolution of the OLED display panel, the higher the risk of lateral leakage.
  • the purpose of the present disclosure is to overcome the shortcomings of the above-mentioned prior art, and provide a display panel, a driving method thereof, and a display device.
  • a display panel including a light emitting element and a pixel circuit, and the pixel circuit includes:
  • the enable signal terminal is connected to the light-emitting element and is configured to output an enable signal to the light-emitting element, the enable signal is a pulse width modulation signal, and includes a plurality of intervals of the first effective voltage within one frame of light-emitting duration. level, between two adjacent first active levels is a first inactive level, and the enable signal can drive the light-emitting element to emit light during the first active level period;
  • the reset signal terminal is connected to the light-emitting element and is configured to output a reset signal to the light-emitting element, the reset signal includes at least one second active level and one second inactive level within one frame of light-emitting duration, and the first Two active levels are located in the first inactive level period, the first active level is located in the second inactive level period, and the reset signal can control the The light emitting device is reset.
  • the enable signal includes a plurality of first inactive levels within one frame of lighting duration
  • the reset signal includes at least one second active level within one frame of lighting duration. level, one of the second active levels is within one of the first inactive level periods, and the reset signal can reset the light emitting device during the second active level period.
  • the reset signal includes a plurality of second active levels within one frame of lighting duration, and the number of the second active levels is equal to the number of the first inactive levels equal, each of the second active levels is located in each of the first inactive level periods in one-to-one correspondence, and the reset signal can reset the light emitting device in each of the second active level periods .
  • the second active level of the reset signal includes at least one second active sub-level, and each of the second active sub-levels of each second active level The reset signal is capable of resetting the light-emitting device in each of the second sub-active level periods on average within the same period of the first inactive level.
  • the second active level duration T2 of the reset signal is less than or equal to the first inactive level duration T1 of the enable signal
  • the second active level duration T2 is the total duration of each of the second sub-active levels.
  • the second active level duration T2 of the reset signal accounts for 0.2-99% of the first inactive level duration T1 of the enable signal.
  • the start time of the second active level of the reset signal is at the same time as the corresponding start time of the first inactive level of the enable signal
  • the start time of the second active level is the start time of the first second sub-active level.
  • the voltages of the reset signals in the second active level stages are equal or unequal.
  • the display panel further includes a first power supply terminal and a second power supply terminal respectively connected to two ends of the light-emitting element, and the first power supply terminal is used to supply power to the light-emitting element.
  • the first power supply terminal is used to supply power to the light-emitting element.
  • the second power supply terminal is used to provide a second voltage to the light-emitting element, the first voltage is greater than the second voltage, and the difference between the first voltage and the second voltage is greater than the light-emitting element
  • the threshold voltage of the element
  • the voltage of the reset signal is lower than the second voltage.
  • the difference between the voltage of the reset signal and the second voltage is less than or equal to 10V.
  • a method for driving a display panel including:
  • Light-emitting stage output an enable signal to the light-emitting element, the enable signal is a pulse width modulation signal, including a plurality of intervals of the first active level, and the first invalid level is between two adjacent first active levels level, the enable signal drives the light emitting element to emit light during the first effective level period;
  • the enable signal is a pulse width modulation signal, including a plurality of intervals of the first active level, and the first invalid level is between two adjacent first active levels level, the enable signal drives the light emitting element to emit light during the first effective level period;
  • Reset phase output a reset signal to the light emitting element, the reset signal includes at least one second active level, the second active level is located within the first inactive level period, and the first active level Located within the second inactive level period, the reset signal resets the light emitting device during the second active level period.
  • the reset signal output to the light-emitting element includes a plurality of second active levels within one frame of light-emitting duration, and the number of the second active levels is the same as that of the first The number of inactive levels is equal, and each of the second active levels is located in each of the first inactive level periods in one-to-one correspondence, and the reset signal is activated for each of the second active level periods.
  • the light emitting device is reset.
  • a display device including the above-mentioned display panel.
  • FIG. 1 is a schematic diagram of a pixel circuit according to an embodiment of the present disclosure
  • FIG. 2 is a waveform diagram of a first enabling signal and a reset signal in an embodiment of the present disclosure
  • FIG. 3 is a waveform diagram of a second enabling signal and a reset signal in an embodiment of the present disclosure
  • FIG. 4 is a waveform diagram of a third enabling signal and a reset signal in an embodiment of the present disclosure
  • FIG. 5 is a waveform diagram of a fourth enabling signal and a reset signal in an embodiment of the present disclosure
  • FIG. 6 is a waveform diagram of a fifth enabling signal and a reset signal in an embodiment of the present disclosure
  • Fig. 7 is a schematic diagram of comparison of waveforms of different enabling signals
  • Fig. 8 is a kind of lateral leakage test curve
  • FIG. 9 is another lateral leakage test curve.
  • Example embodiments will now be described more fully with reference to the accompanying drawings.
  • Example embodiments may, however, be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art.
  • the same reference numerals in the drawings denote the same or similar structures, and thus their detailed descriptions will be omitted.
  • the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale.
  • the existing OLED display panel drives the light-emitting element to emit light based on the pixel circuit, and the light-emitting unit is charged when it receives the effective level of the enable signal.
  • the enable signal is a progressive scan, when a single color pixel (such as red) is turned on, as long as another color (such as green) pixel is biased, there will be charge accumulation. When the charge accumulation is large, it may be The phenomenon of leakage current passing occurs. Although the leakage current is usually small, it may also consume pixels of other colors. It has a greater impact on the display of pure colors at low grayscale or low brightness than at high grayscale/high brightness, which will reduce the display. Effect.
  • an embodiment of the present disclosure provides a display panel, which includes a plurality of sub-pixels of different colors, and each sub-pixel includes a light-emitting element and a pixel circuit.
  • FIG. 1 it is a pixel circuit of the display panel.
  • the pixel circuit includes an enabling signal terminal and a reset signal terminal.
  • Figure 2 shows the timing diagram for the enable signal and reset signal.
  • the enable signal end is connected to the light-emitting element, and is configured to output an enable signal to the light-emitting element.
  • the enable signal is a pulse width modulation signal, and includes multiple intervals of the first active level T1 within one frame of light-emitting duration, and two adjacent The interval between the first active levels T1 is a first inactive level T1 ′, and the enable signal can drive the light-emitting element to emit light during the period of the first active level T1 .
  • the reset signal end is connected to the light-emitting element, and is configured so that the light-emitting element outputs a reset signal.
  • the reset signal includes at least one second active level T2 and one second inactive level T2' within one frame of light-emitting time.
  • the second active level T2 is at During the period of the first inactive level T1', the first active level T1 is located in the period of the second inactive level T2', and the reset signal can reset the light emitting device during the period of the second active level T2.
  • the enabling signal of the present disclosure is a pulse width modulation signal (PWM signal), that is, the screen is continuously turned on and off within one frame of light-emitting duration, and the display panel adjusts the light-emitting brightness by adjusting the duty ratio of the PWM signal. That is to say, the light-emitting element emits light during the period of the first active level T1 of the enable signal, and does not emit light during the period of the first invalid level T1'.
  • the reset signal resets the light emitting device when the light emitting element is not emitting light.
  • the reset signal is a row-by-row scan, when resetting the sub-pixels in the same row, on the one hand, it can release the charges accumulated in other sub-pixels, so that the charges can return to the negative and positive levels faster, reducing the risk of side leakage.
  • the reset operation since the reset operation is performed during the period of the first inactive level T1' of the enable signal, it will not affect the lighting of the current pixel.
  • the display panel according to the embodiment of the present disclosure will be described in detail below.
  • the pixel circuit may include: a first transistor T1, a second transistor T2, a driving transistor T3, a fourth transistor T4, a fifth transistor T5, a sixth transistor T6, a seventh transistor T7, and a capacitor C.
  • the first pole of the first transistor T1 is connected to the node N, the second pole is connected to the initialization signal terminal Vinit, and the gate is connected to the reset signal terminal Re;
  • the first pole of the second transistor T2 is connected to the first pole of the driving transistor T3, and the second pole Connect the node N;
  • the gate is connected to the gate drive signal terminal Gate;
  • the gate of the drive transistor T3 is connected to the node N;
  • the first pole of the fourth transistor T4 is connected to the data signal terminal Da, and the second pole is connected to the second pole of the drive transistor T3,
  • the gate is connected to the gate drive signal terminal Gate;
  • the first pole of the fifth transistor T5 is connected to the first power supply terminal VDD, the second pole is connected to the second pole of the drive transistor T3, and the gate is connected to the enable signal terminal EM;
  • the sixth transistor T6 The first pole is connected to the first pole of the driving transistor T3, and the gate is connected to the enable signal terminal EM;
  • the gate of the seventh transistor T7 is
  • the second pole of T6 The pixel circuit may be connected to a light emitting unit OLED for driving the light emitting unit OLED to emit light, and the light emitting unit OLED may be connected between the second pole of the sixth transistor T6 and the second power supply terminal VSS.
  • the transistors T1-T7 may all be N-type transistors.
  • the enable signal EM is a pulse width modulation signal, which includes a plurality of first active levels T1 and a plurality of first inactive levels T1' in one frame of light-emitting phase.
  • the first active level T1 is high level
  • the first inactive level T1' is low level.
  • the total duration of one frame of light emission is 16667 ⁇ s, which includes eight first active levels T1 and seven first inactive levels T1', wherein the duration of the first active level T1 is In 2010.4 ⁇ s, the duration of the first inactive level T1' is 72.5 ⁇ s.
  • the gate drive signal Gate and the data signal Da of the sub-pixel are both at an active level within one frame of light-emitting duration, and at this time, each first active level of the light-emitting element within the frame of light-emitting duration Level T1 period can be driven to emit light.
  • the reset signal includes at least one second effective level T2 within the light-emitting duration of the frame.
  • the second active level T2 is a high level
  • the second inactive level T2' is a low level.
  • the reset signal shown in FIG. 2 within one frame of lighting duration, the reset signal includes a second active level T2, and the second active level T2 is located in the first first inactive level T1', also That is to say, the reset signal resets the light-emitting element when the light-emitting element is turned off for the first time within one frame of light-emitting time.
  • the reset signal may also include two or more second active levels T2, each second active level T2 is within a first inactive level T1', and can emit light during the light-emitting period t3. The device undergoes multiple resets to reduce charge buildup.
  • both the reset signal and the enable signal can be provided by the overdrive chip of the GOA circuit arranged around the panel.
  • the reset signal includes a plurality of second active levels T2 within one frame of lighting duration, and the number of the second active levels T2 is equal to the number of the first inactive levels T1', the reset signal
  • Each second active level T2 of the enable signal is one-to-one corresponding to each first inactive level T1' period of the enable signal, and the reset signal can activate the light-emitting device in each first inactive level T1' period of the enable signal Do a reset.
  • the reset signal in a light-emitting period t3, includes seven second active levels T2, and the seven second active levels T2 correspond one-to-one to the seven first inactive levels T1 ', that is to say, the reset signal resets the light-emitting element every time the light-emitting element is turned off in the light-emitting period t3, thereby avoiding leakage of other sub-pixels due to charge accumulation to a greater extent.
  • the durations of the second active levels T2 can be the same or different.
  • the second active level T2 of the reset signal includes at least one second active sub-level, and when the second active level T2 includes multiple second active sub-levels, each second active sub-level is within the same period of the first inactive level T1'.
  • each second active level T2 of the reset signal includes two spaced second sub-active levels, and the two second sub-active levels are located at the same first inactive level of the enable signal within T1'.
  • the reset signal can perform two reset operations on the light emitting device within each period of the second effective level T2 to further release the accumulated charges.
  • one second active level T2 of the reset signal also includes three, four or more second sub-active levels, or only one second sub-active level. When the second active level T2 includes multiple second active sub-levels, the durations of the second active sub-levels may be the same or different.
  • the second active level T2 of the reset signal is within the duration of the first inactive level T1' of the enable signal, that is, the duration T2 of the second active level T2 of the reset signal is less than or equal to the first invalid level T2 of the enable signal
  • the level T1' is long, so that the light-emitting element can be reset without affecting the normal light emission of the light-emitting element.
  • the duration of the second active level T2 is the total duration of each second sub-active level.
  • the duration of the second active level T2 of the reset signal determines the charge release to the light-emitting element. If the time is too short, the charge release may be incomplete, and if the time is too long, it may affect the normal progress of the compensation phase or the light-emitting phase. Therefore, the ratio of the duration T2 of the second active level of the reset signal to the duration of the first inactive level T1' of the enable signal is preferably in the range of 0.2-99%.
  • the duration of the first inactive level T1' of the enable signal is 72.5 ⁇ s
  • the duration of the second active level T2 of the reset signal is 5.2 ⁇ s
  • the duration of the second active level T2 is T2
  • the ratio to the duration of the first inactive level T1' of the enable signal is 7.17%.
  • the start time of the second active level T2 of the reset signal is at the same time as the start time of the corresponding first inactive level T1' of the enable signal.
  • the second active level T2 of the reset signal is high level
  • the first inactive level T1' of the enable signal is low level
  • the rising edge of the reset signal is at the same level as the falling edge of the enable signal.
  • the light-emitting element is reset just after the first active level T1 of the enable signal ends, so that while eliminating the accumulated charge of other sub-pixels, the light-emitting element can also be quickly turned off by the reset signal.
  • the start time of the second active level T2 is the start time of the first second sub-active level That is to say, the light-emitting element is reset for the first time immediately after the first active level T1 of the enable signal ends, and multiple resets are performed successively within the first active level T1 to realize the release of accumulated charges.
  • the voltage of the first power supply terminal VDD is the first voltage
  • the voltage of the second power supply terminal VSS is the second voltage
  • the first voltage is greater than the second voltage
  • the difference between the first voltage and the second voltage is greater than the light emitting element
  • the threshold voltage enables the light-emitting element to be driven to emit light.
  • the voltage of the reset signal is lower than the second voltage, so that a reverse voltage can be applied to the light-emitting element, causing a stronger electric field to force the light-emitting element to discharge, thereby reducing the chance of electric leakage.
  • the difference between the voltage of the reset signal of the present disclosure and the second voltage is less than or equal to 10V, so that an ideal charge discharge effect can be achieved without affecting subsequent normal light emission.
  • the present disclosure only shows a structure of a pixel circuit, and the reset signal terminal and the enable signal terminal of the present disclosure can also be used in other pixel circuit structures, both of which can improve the lateral leakage of the display panel. I won't repeat them one by one.
  • the embodiment of the present disclosure also provides a display panel driving method, including:
  • Light-emitting stage output an enable signal to the light-emitting element, the enable signal is a pulse width modulation signal, including a plurality of intervals of the first active level T1, and the first invalid level between two adjacent first active levels T1 level T1', the enable signal drives the light-emitting element to emit light during the period of the first active level T1.
  • the enable signal is a pulse width modulation signal, including a plurality of intervals of the first active level T1, and the first invalid level between two adjacent first active levels T1 level T1', the enable signal drives the light-emitting element to emit light during the period of the first active level T1.
  • Reset phase output a reset signal to the light-emitting element, the reset signal includes at least one second active level T2, the second active level T2 is within the period of the first inactive level T1', and the first active level T1 is within the second active level T1' During the period of the inactive level T2', the reset signal resets the light emitting device during the period of the second active level T2.
  • the reset signal output to the light-emitting element includes a plurality of second active levels T2 within one frame of light-emitting duration, and the number of the second active levels T2 is equal to that of the first inactive level T1' The numbers are equal, each second active level T2 is one-to-one corresponding to each first inactive level T1' period, and the reset signal resets the light emitting device in each second active level T2 period.
  • the display panel which will not be repeated here.
  • FIG. 7 it shows a comparative schematic diagram of several different EM signal waveforms.
  • the top is the EM signal waveform diagram of the pulse width modulation signal performing the reset operation of the present disclosure
  • the second is the pulse width modulation without performing the reset operation of the present disclosure.
  • Signal EM signal waveform diagram the third is the traditional EM signal waveform diagram when it is continuously lit during the lighting stage. Comparing the three waveform diagrams, it can be seen that the pulse width modulation signal EM signal waveform diagram of the disclosed reset operation is advanced in phase compared with that without the reset operation, and the advanced time is the duration of the second active level T2 of the reset signal.
  • FIG. 8 and FIG. 9 it is a performance comparison of the lateral leakage of the display panel of the present disclosure.
  • the green sub-pixel is turned on, and the leakage of the red sub-pixel is tested.
  • Figure 8 shows the leakage curves of the two sample tests, the abscissa is the spectrum, and the ordinate is the percentage of lateral leakage.
  • Curve L1' represents the change curve of the lateral leakage percentage with the spectrum when the sub-pixel is reset according to the disclosure in the first test
  • curve L2 represents the lateral leakage when the sub-pixel is not reset according to the disclosure in the second test
  • the curve L2' represents the variation curve of the lateral leakage percentage with the spectrum when the sub-pixel is reset according to the disclosure in the second test
  • the voltage of the reset signal in the two tests is -1V.
  • two sample tests were carried out in the same way, the difference is that the reset signal voltage is 0V and the PWM duty cycle is different, the results are shown in Figure 9.
  • Embodiments of the present invention also provide a display device, which includes the display module of the above embodiment. Since the display device includes the above display module, it has the same beneficial effects, and the present invention will not repeat them here.
  • the present invention does not specifically limit the application of the display device, which can be any display device with flexible display functions such as televisions, notebook computers, tablet computers, wearable display devices, mobile phones, vehicle displays, navigation, e-books, digital photo frames, advertising light boxes, etc. products or components.
  • the display device can be any display device with flexible display functions such as televisions, notebook computers, tablet computers, wearable display devices, mobile phones, vehicle displays, navigation, e-books, digital photo frames, advertising light boxes, etc. products or components.

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Abstract

一种显示面板及其驱动方法、显示装置，显示面板包括发光元件和像素电路，像素电路包括使能信号端和复位信号端，使能信号为脉冲宽度调制信号，在一帧发光时长内包含多个间隔的第一有效电平，相邻两个第一有效电平之间为第一无效电平，使能信号在第一有效电平时段能够驱动发光元件发光；复位信号在一帧发光时长内包含至少一个第二有效电平和一个第二无效电平，第二有效电平位于第一无效电平时段内，第一有效电平位于第二无效电平时段内，复位信号能够在第二有效电平时段对发光元件进行复位。

Description

显示面板及其驱动方法、显示装置
交叉引用
本公开要求于2021年6月22日提交的申请号为202110690038.6名称为“显示面板及其驱动方法、显示装置”的中国专利申请的优先权，该中国专利申请的全部内容通过引用全部并入本文。
技术领域
本公开涉及显示技术领域，具体而言，涉及一种显示面板及其驱动方法、显示装置。
背景技术
OLED显示面板是一种重要的显示设备，在手机、车载、显示器、电视和公共显示等领域已得到广泛的应用，市场对OLED显示面板需求也越来越大。然而，分辩率越高的OLED显示面板侧向漏电的风险也越高。
公开内容
本公开的目的在于克服上述现有技术的不足，提供一种显示面板及其驱动方法、显示装置。
根据本公开的一个方面，提供一种显示面板，包括发光元件和像素电路，所述像素电路包括：
使能信号端，连接所述发光元件，被配置为向所述发光元件输出使能信号，所述使能信号为脉冲宽度调制信号，在一帧发光时长内包含多个间隔的第一有效电平，相邻两个所述第一有效电平之间为第一无效电平，所述使能信号在所述第一有效电平时段能够驱动所述发光元件发光；
复位信号端，连接所述发光元件，被配置为向所述发光元件输出复位信号，所述复位信号在一帧发光时长内包含至少一个第二有效电平和一个第二无效电平，所述第二有效电平位于所述第一无效电平时段内，所述第一有效电平位于所述第二无效电平时段内，所述复位信号能够在 所述第二有效电平时段对所述发光器件进行复位。
在本公开的一种示例性实施方式中，所述使能信号在一帧发光时长内包含多个所述第一无效电平，所述复位信号在一帧发光时长内包含至少一个第二有效电平，一个所述第二有效电平位于一个所述第一无效电平时段内，所述复位信号能够在所述第二有效电平时段对所述发光器件进行复位。
在本公开的一种示例性实施方式中，所述复位信号在一帧发光时长内包含多个第二有效电平，所述第二有效电平的数量与所述第一无效电平的数量相等，各所述第二有效电平一一对应的位于各所述第一无效电平时段内，所述复位信号能够在每个所述第二有效电平时段都对所述发光器件进行复位。
在本公开的一种示例性实施方式中，所述复位信号的第二有效电平包含至少一个第二子有效电平，每一个所述第二有效电平的各所述第二子有效电平均位于同一个所述第一无效电平的时段内，所述复位信号能够在每个所述第二子有效电平时段对所述发光器件进行复位。
在本公开的一种示例性实施方式中，所述复位信号的第二有效电平时长T2小于或等于所述使能信号的第一无效电平时长T1；
其中，所述第二有效电平包含多个所述第二子有效电平时，所述第二有效电平时长T2为各所述第二子有效电平的总时长。
在本公开的一种示例性实施方式中，所述复位信号的第二有效电平时长T2占所述使能信号的第一无效电平时长T1的0.2-99％。
在本公开的一种示例性实施方式中，所述复位信号的第二有效电平的起始时间与对应的所述使能信号的第一无效电平的起始时间位于同一时间；
其中，所述第二有效电平包含多个所述第二子有效电平时，所述第二有效电平的起始时间为第一个所述第二子有效电平的起始时间。
在本公开的一种示例性实施方式中，各所述第二有效电平阶段的复位信号的电压相等或不相等。
在本公开的一种示例性实施方式中，所述显示面板还包括分别连接与所述发光元件两端的第一电源端和第二电源端，所述第一电源端用于 向所述发光元件提供第一电压，所述第二电源端用于向所述发光元件提供第二电压，所述第一电压大于第二电压，且所述第一电压和第二电压的差值大于所述发光元件的阈值电压；
所述复位信号的电压小于所述第二电压。
在本公开的一种示例性实施方式中，所述复位信号的电压与所述第二电压的差值小于或等于10V。
根据本公开的另一个方面，还提供一种显示面板驱动方法，包括：
发光阶段：向发光元件输出使能信号，所述使能信号为脉冲宽度调制信号，包含多个间隔的第一有效电平，相邻两个所述第一有效电平之间为第一无效电平，所述使能信号在所述第一有效电平时段驱动所述发光元件发光；
复位阶段：向所述发光元件输出复位信号，所述复位信号包含至少一个第二有效电平，所述第二有效电平位于所述第一无效电平时段内，所述第一有效电平位于所述第二无效电平时段内，所述复位信号在所述第二有效电平时段对所述发光器件进行复位。
在本公开的一种示例性实施方式中，向所述发光元件输出的复位信号在一帧发光时长内包含多个第二有效电平，所述第二有效电平的数量与所述第一无效电平的数量相等，各所述第二有效电平一一对应的位于各所述第一无效电平时段内，所述复位信号在每个所述第二有效电平时段都对所述发光器件进行复位。
根据本公开的再一个方面，还提供一种显示装置，包括以上所述的显示面板。
应当理解的是，以上的一般描述和后文的细节描述仅是示例性和解释性的，并不能限制本公开。
附图说明
此处的附图被并入说明书中并构成本说明书的一部分，示出了符合本公开的实施例，并与说明书一起用于解释本公开的原理。显而易见地，下面描述中的附图仅仅是本公开的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他 的附图。
图1为本公开实施方式的一种像素电路示意图；
图2为本公开实施方式的第一种使能信号和复位信号波形图；
图3为本公开实施方式的第二种使能信号和复位信号波形图；
图4为本公开实施方式的第三种使能信号和复位信号波形图；
图5为本公开实施方式的第四种使能信号和复位信号波形图；
图6为本公开实施方式的第五种使能信号和复位信号波形图；
图7为不同使能信号的波形对比示意图；
图8为一种侧向漏电测试曲线图；
图9为另一种侧向漏电测试曲线图。
具体实施方式
现在将参考附图更全面地描述示例实施方式。然而，示例实施方式能够以多种形式实施，且不应被理解为限于在此阐述的实施方式；相反，提供这些实施方式使得本公开将全面和完整，并将示例实施方式的构思全面地传达给本领域的技术人员。图中相同的附图标记表示相同或类似的结构，因而将省略它们的详细描述。此外，附图仅为本公开的示意性图解，并非一定是按比例绘制。
虽然本说明书中使用相对性的用语，例如“上”“下”来描述图标的一个组件对于另一组件的相对关系，但是这些术语用于本说明书中仅出于方便，例如根据附图中所述的示例的方向。能理解的是，如果将图标的装置翻转使其上下颠倒，则所叙述在“上”的组件将会成为在“下”的组件。当某结构在其它结构“上”时，有可能是指某结构一体形成于其它结构上，或指某结构“直接”设置在其它结构上，或指某结构通过另一结构“间接”设置在其它结构上。
用语“一个”、“一”、“该”、“所述”和“至少一个”用以表示存在一个或多个要素/组成部分/等；用语“包括”和“具有”用以表示开放式的包括在内的意思并且是指除了列出的要素/组成部分/等之外还可存在另外的要素/组成部分/等；用语“第一”、“第二”和“第三”等仅作为标记使用，不是对其对象的数量限制。
现有OLED显示面板基于像素电路对发光元件进行驱动发光，发光单元接收到使能信号的有效电平时被电量。由于使能信号是逐行扫描，当点亮某单色像素(如红色)时，另一个颜色(如绿色)像素只要有偏压施予，就会有电荷累积，当电荷累计较多时可能会出现漏电电流通过的现象，漏电电流虽然通常较小，但也可能会电量其他颜色的像素，在低灰阶或低亮度时对纯色的显示影响比高灰阶/高亮度要大，会降低显示效果。
基于此，本公开实施方式提供一种显示面板，该显示面板包括多个不同颜色的子像素，各子像素包括发光元件和像素电路，参照图1所示，为该显示面板的一种像素电路，该像素电路包括使能信号端和复位信号端。图2所示为使能信号和复位信号的时序图。
使能信号端连接发光元件，被配置为向发光元件输出使能信号，使能信号为脉冲宽度调制信号，在一帧发光时长内包含多个间隔的第一有效电平T1，相邻两个第一有效电平T1之间为第一无效电平T1’，使能信号在第一有效电平T1时段能够驱动发光元件发光。复位信号端连接发光元件，被配置为发光元件输出复位信号，复位信号在一帧发光时长内包含至少一个第二有效电平T2和一个第二无效电平T2’，第二有效电平T2位于第一无效电平T1’时段内，第一有效电平T1位于第二无效电平T2’时段内，复位信号能够在第二有效电平T2时段对发光器件进行复位。
本公开的使能信号为脉冲宽度调制信号(PWM信号)，即在一帧发光时长内不断点亮和熄灭屏幕，显示面板通过调节PWM信号的占空比来调节发光亮度。也就是说，发光元件在使能信号的第一有效电平T1时段发光，在第一无效电平T1’时段不发光。复位信号则在发光元件不发光的时候对发光器件进行复位。由于复位信号是逐行扫描，在对同一行的各子像素进行复位时，一方面可以将其他子像素累积的电荷释放掉，使电荷更快的回到阴阳级，降低侧量漏电的风险。另一方面由于复位操作在使能信号的第一无效电平T1’时段进行，也不会影响当前像素的点亮。
下面对本公开实施方式的显示面板进行详细的说明。
如图1所示，本公开一种7T1C像素电路的电路结构示意图。该像素电路可以包括：第一晶体管T1、第二晶体管T2、驱动晶体管T3、第四晶体管T4、第五晶体管T5、第六晶体管T6、第七晶体管T7、电容C。其中，第一晶体管T1的第一极连接节点N，第二极连接初始化信号端Vinit，栅极连接复位信号端Re；第二晶体管T2第一极连接驱动晶体管T3的第一极，第二极连接节点N；栅极连接栅极驱动信号端Gate；驱动晶体管T3的栅极连接节点N；第四晶体管T4的第一极连接数据信号端Da，第二极连接驱动晶体管T3的第二极，栅极连接栅极驱动信号端Gate；第五晶体管T5的第一极连接第一电源端VDD，第二极连接驱动晶体管T3的第二极，栅极连接使能信号端EM；第六晶体管T6第一极连接驱动晶体管T3的第一极，栅极连接使能信号端EM；第七晶体管T7的栅极连接复位信号端Re，第一极连接初始化信号端Vinit，第二极连接第六晶体管T6的第二极。该像素电路可以连接一发光单元OLED，用于驱动该发光单元OLED发光，发光单元OLED可以连接于第六晶体管T6的第二极和第二电源端VSS之间。其中，晶体管T1-T7可以均为N型晶体管。
使能信号EM为脉冲宽度调制信号，其在一帧发光阶段内包含多个第一有效电平T1和多个第一无效电平T1’，本实施例中，第一有效电平T1为高电平，第一无效电平T1’为低电平。以图2中所示的脉冲信号为例，一帧发光总时长为16667μs，其包含八个第一有效电平T1和七个第一无效电平T1’，其中第一有效电平T1时长为2010.4μs，第一无效电平T1’时长为72.5μs。当需要点亮当前子像素时，该子像素的栅极驱动信号Gate和数据信号Da在一帧发光时长内都为有效电平，此时发光元件在该帧发光时长内的每一个第一有效电平T1时段都能够被驱动发光。
复位信号在该帧发光时长内包含至少一个第二有效电平T2。本实施例中，第二有效电平T2为高电平，第二无效电平T2’为低电平。以图2中所示复位信号为例，在一帧发光时长内，复位信号包含一个第二有效电平T2，该第二有效电平T2位于第一个第一无效电平T1’内，也就是说，复位信号在一帧发光时长内发光元件第一次熄灭时对发光元件进行复位。同理，该第二有效电平T2位于第二个、第三个、……、第七个 中的任意一个第一无效电平T1’内，都可以对该行的发光器件进行复位，避免其他子像素因电荷累计而造成漏电。可以理解的是，复位信号还可以包括两个或更多个第二有效电平T2，每个第二有效电平T2位于一个第一无效电平T1’内，可以在发光阶段t3内对发光元件进行多次复位，降低电荷累积。
本公开中，复位信号和使能信号都可以通过设置于面板周边的GOA电路过驱动芯片提供。
例如，在一种实施例中，复位信号在一帧发光时长内包含多个第二有效电平T2，且第二有效电平T2的数量与第一无效电平T1’的数量相等，复位信号的各第二有效电平T2一一对应的位于使能信号的各第一无效电平T1’时段内，复位信号能够在使能信号的每个第一无效电平T1’时段都对发光器件进行复位。以图3中所示信号为例，在一发光阶段t3内，复位信号包含七个第二有效电平T2，七个第二有效电平T2一一对应的位于七个第一无效电平T1’内，也就是说，复位信号在发光阶段t3内发光元件每一次熄灭时都对发光元件进行复位，由此可以更大程度上避免其他子像素因电荷累计而造成漏电。
复位信号在复位阶段t1内包含多个第二有效电平T2时，各第二有效电平T2的时长可以相同，也可以不同。
再一种实施例中，复位信号的第二有效电平T2包含至少一个第二子有效电平，当第二有效电平T2包含多个第二子有效电平时，各第二子有效电平均位于同一个第一无效电平T1’的时段内。如图4所示，复位信号的每一个第二有效电平T2都包含两个间隔的第二子有效电平，两个第二子有效电平位于使能信号的同一个第一无效电平T1’内。复位信号能够在每一个第二有效电平T2时段内，对发光器件进行两次复位操作，进一步释放累积的电荷。可以理解的是，复位信号的一个第二有效电平T2内还包含三个、四个或更多个第二子有效电平，也可以只包含一个第二子有效电平。当第二有效电平T2包含多个第二子有效电平时，各第二子有效电平的时长可以相同，也可以不同。
本公开中，复位信号的第二有效电平T2位于使能信号的第一无效电平T1’时长内，即复位信号的第二有效电平T2时长T2小于或等于使能 信号的第一无效电平T1’时长，由此既可以对发光元件进行复位操作，又不会影响发光元件正常发光。当第二有效电平T2包含多个第二子有效电平时，第二有效电平T2时长为各第二子有效电平的总时长。
进一步地，复位信号的第二有效电平T2时长决定了对发光元件的电荷释放，若时间过短可能导致电荷释放不完全，若时间过长可能影响补偿阶段或发光阶段正常进行。因此，复位信号的第二有效电平时长T2和使能信号的第一无效电平T1’时长的比值优选在0.2-99％范围内。举例而言，以图中所示为例，使能信号的第一无效电平T1’时长为72.5μs，复位信号的第二有效电平T2时长为5.2μs，第二有效电平T2时长T2和使能信号的第一无效电平T1’时长的比值为7.17％。
本公开中，复位信号的第二有效电平T2的起始时间与对应的使能信号的第一无效电平T1’的起始时间位于同一时间。如图5所示，复位信号的第二有效电平T2为高电平，使能信号的第一无效电平T1’为低电平，复位信号的上升沿与使能信号的下降沿位于同一时间，也就是说，发光元件在使能信号第一有效电平T1刚结束时就进行复位，由此在消除其他子像素累计电荷的同时，还可以通过复位信号快速的关断发光元件。
如图6所示，当复位信号的第二有效电平T2包含多个第二子有效电平时，第二有效电平T2的起始时间为第一个第二子有效电平的起始时间，也就是说，发光元件在使能信号第一有效电平T1刚结束时就进行第一次复位，在该第一有效电平T1内先后进行多次复位，实现对累积电荷的释放。
本公开中，第一电源端VDD的电压为第一电压，第二电源端VSS的电压为第二电压，第一电压大于第二电压，且第一电压和第二电压的差值大于发光元件的阈值电压，使得发光元件能够被驱动发光。为了对其进行复位，复位信号的电压小于第二电压，由此可以在发光元件上施加一反向电压，造成较强大的电场强迫发光元件在放电，进而减少漏电机会。
进一步地，本公开的复位信号的电压与第二电压的差值小于或等于10V，由此可以实现理想的释放电荷的效果且不会影响后续正常发光。
需要说明的是，本公开仅示出了一种像素电路的结构，本公开的复 位信号端、使能信号端还能够用于其他像素电路的结构，都可以改善显示面板侧向漏电，本公开不再一一赘述。
本公开实施方式还提供一种显示面板驱动方法，包括：
a)发光阶段：向发光元件输出使能信号，使能信号为脉冲宽度调制信号，包含多个间隔的第一有效电平T1，相邻两个第一有效电平T1之间为第一无效电平T1’，使能信号在第一有效电平T1时段驱动发光元件发光。
b)复位阶段：向发光元件输出复位信号，复位信号包含至少一个第二有效电平T2，第二有效电平T2位于第一无效电平T1’时段内，第一有效电平T1位于第二无效电平T2’时段内，复位信号在第二有效电平T2时段对发光器件进行复位。
在一种实施例中，参考图4，向发光元件输出的复位信号在一帧发光时长内包含多个第二有效电平T2，第二有效电平T2的数量与第一无效电平T1’的数量相等，各第二有效电平T2一一对应的位于各第一无效电平T1’时段内，复位信号在每个第二有效电平T2时段都对发光器件进行复位。具体可参考显示面板的描述，此处不再赘述。
参考图7，示出了几种不同的EM信号波形的对比示意图，最上方为进行本公开复位操作的脉冲宽度调制信号EM信号波形图，第二种为不进行本公开复位操作的脉冲宽度调制信号EM信号波形图，第三种为传统在发光阶段持续点亮时的EM信号波形图。对比三种波形图可看出，进行本公开复位操作的脉冲宽度调制信号EM信号波形图相对于不进行复位操作，相位提前，提前的时间即为复位信号第二有效电平T2的时长。
参考图8和图9，为本公开显示面板侧向漏电的性能比较，该测试为点亮绿色子像素，测试红色子像素的漏电情况。图8中示出了两次样本测试的漏电曲线，横坐标为光谱，纵坐标为侧向漏电百分比，曲线L1表示第一次样本测试中子像素不进行本公开复位时侧向漏电百分比随光谱的变化曲线，曲线L1’表示第一次测试中子像素进行本公开的复位时侧向漏电百分比随光谱的变化曲线，曲线L2表示第二次测试中子像素不进行本公开复位时侧向漏电百分比随光谱的变化曲线，曲线L2’表示第二次测试中子像素进行本公开的复位时侧向漏电百分比随光谱的变化曲 线，这两次测试中复位信号电压均为-1V。另外，按照同样的方式再进行了两次样本测试，区别在于复位信号电压均为0V以及不同的PWM占空比，结果见图9。
结果显示，两次样本无论是否进行本公开复位操作，其漏电情况基本一致，说明该复位方法效果稳定。根据图8曲线可以看出，当点亮绿色子像素时，在不进行复位操作的情况下，红色子像素侧向漏电百分比约为11.66％，进行本公开的-1V的复位操作后，红色子像素侧向漏电百分比降低至约为9％，漏电百分比减少约2.66％。根据图9曲线可以看出，当点亮绿色子像素时，在不进行复位操作的情况下，红色子像素侧向漏电百分比约为16.22％，进行本公开的0V的复位操作后，红色子像素侧向漏电百分比降低至约为13.3％，漏电百分比减少约2.92％。上述测试结果均表明，无论复位信号电压大小是多少，PWM占空比是多少，本公开的复位操作对于改善侧向漏电均有理想的效果。
本发明实施方式还提供一种显示装置，该显示装置包括上述实施方式的显示模组。由于该显示装置包括上述显示模组，因此具有相同的有益效果，本发明在此不再赘述。
本发明对于显示装置的适用不做具体限制，其可以是电视机、笔记本电脑、平板电脑、可穿戴显示设备、手机、车载显示、导航、电子书、数码相框、广告灯箱等任何具有柔性显示功能的产品或部件。
本领域技术人员在考虑说明书及实践这里公开的发明后，将容易想到本公开的其它实施方案。本申请旨在涵盖本公开的任何变型、用途或者适应性变化，这些变型、用途或者适应性变化遵循本公开的一般性原理并包括本公开未公开的本技术领域中的公知常识或惯用技术手段。说明书和实施例仅被视为示例性的，本公开的真正范围和精神由所附的权利要求指出。

Claims (13)

  1. 一种显示面板，其特征在于，包括发光元件和像素电路，所述像素电路包括：
    使能信号端，连接所述发光元件，被配置为向所述发光元件输出使能信号，所述使能信号为脉冲宽度调制信号，在一帧发光时长内包含多个间隔的第一有效电平，相邻两个所述第一有效电平之间为第一无效电平，所述使能信号在所述第一有效电平时段能够驱动所述发光元件发光；
    复位信号端，连接所述发光元件，被配置为向所述发光元件输出复位信号，所述复位信号在一帧发光时长内包含至少一个第二有效电平和一个第二无效电平，所述第二有效电平位于所述第一无效电平时段内，所述第一有效电平位于所述第二无效电平时段内，所述复位信号能够在所述第二有效电平时段对所述发光器件进行复位。
  2. 根据权利要求1所述的显示面板，其特征在于，所述使能信号在一帧发光时长内包含多个所述第一无效电平，所述复位信号在一帧发光时长内包含至少一个第二有效电平，一个所述第二有效电平位于一个所述第一无效电平时段内，所述复位信号能够在所述第二有效电平时段对所述发光器件进行复位。
  3. 根据权利要求2所述的显示面板，其特征在于，所述复位信号在一帧发光时长内包含多个第二有效电平，所述第二有效电平的数量与所述第一无效电平的数量相等，各所述第二有效电平一一对应的位于各所述第一无效电平时段内，所述复位信号能够在每个所述第二有效电平时段都对所述发光器件进行复位。
  4. 根据权利要求3所述的显示面板，其特征在于，所述复位信号的第二有效电平包含至少一个第二子有效电平，每一个所述第二有效电平的各所述第二子有效电平均位于同一个所述第一无效电平的时段内，所述复位信号能够在每个所述第二子有效电平时段对所述发光器件进行复位。
  5. 根据权利要求4所述的显示面板，其特征在于，所述复位信号的第二有效电平时长T2小于或等于所述使能信号的第一无效电平时长T1；
    其中，所述第二有效电平包含多个所述第二子有效电平时，所述第 二有效电平时长T2为各所述第二子有效电平的总时长。
  6. 根据权利要求5所述的显示面板，其特征在于，所述复位信号的第二有效电平时长T2占所述使能信号的第一无效电平时长T1的0.2-99％。
  7. 根据权利要求4所述的显示面板，其特征在于，所述复位信号的第二有效电平的起始时间与对应的所述使能信号的第一无效电平的起始时间位于同一时间；
    其中，所述第二有效电平包含多个所述第二子有效电平时，所述第二有效电平的起始时间为第一个所述第二子有效电平的起始时间。
  8. 根据权利要求1所述的显示面板，其特征在于，各所述第二有效电平阶段的复位信号的电压相等或不相等。
  9. 根据权利要求1所述的显示面板，其特征在于，所述显示面板还包括分别连接与所述发光元件两端的第一电源端和第二电源端，所述第一电源端用于向所述发光元件提供第一电压，所述第二电源端用于向所述发光元件提供第二电压，所述第一电压大于第二电压，且所述第一电压和第二电压的差值大于所述发光元件的阈值电压；
    所述复位信号的电压小于所述第二电压。
  10. 根据权利要求9所述的显示面板，其特征在于，所述复位信号的电压与所述第二电压的差值小于或等于10V。
  11. 一种显示面板驱动方法，其特征在于，包括：
    发光阶段：向发光元件输出使能信号，所述使能信号为脉冲宽度调制信号，包含多个间隔的第一有效电平，相邻两个所述第一有效电平之间为第一无效电平，所述使能信号在所述第一有效电平时段驱动所述发光元件发光；
    复位阶段：向所述发光元件输出复位信号，所述复位信号包含至少一个第二有效电平，所述第二有效电平位于所述第一无效电平时段内，所述第一有效电平位于所述第二无效电平时段内，所述复位信号在所述第二有效电平时段对所述发光器件进行复位。
  12. 根据权利要求11所述的显示面板驱动方法，其特征在于，向所述发光元件输出的复位信号在一帧发光时长内包含多个第二有效电平， 所述第二有效电平的数量与所述第一无效电平的数量相等，各所述第二有效电平一一对应的位于各所述第一无效电平时段内，所述复位信号在每个所述第二有效电平时段都对所述发光器件进行复位。
  13. 一种显示装置，其特征在于，包括权利要求1-10中任一项所述的显示面板。
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CN111951731A (zh) * 2020-08-21 2020-11-17 京东方科技集团股份有限公司 像素单元阵列及其驱动方法、显示面板和显示装置
CN111968574A (zh) * 2020-09-03 2020-11-20 上海天马微电子有限公司 一种显示装置及驱动方法
CN112116897A (zh) * 2020-10-15 2020-12-22 厦门天马微电子有限公司 一种像素驱动电路、显示面板以及驱动方法
CN113436577A (zh) * 2021-06-22 2021-09-24 京东方科技集团股份有限公司 显示面板及其驱动方法、显示装置

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