CN116486748A - Pixel driving circuit, display panel and driving method - Google Patents

Pixel driving circuit, display panel and driving method Download PDF

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Publication number
CN116486748A
CN116486748A CN202310468895.0A CN202310468895A CN116486748A CN 116486748 A CN116486748 A CN 116486748A CN 202310468895 A CN202310468895 A CN 202310468895A CN 116486748 A CN116486748 A CN 116486748A
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China
Prior art keywords
driving
switch
control
light
driving switch
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CN202310468895.0A
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Chinese (zh)
Inventor
周满城
张元平
叶利丹
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HKC Co Ltd
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HKC Co Ltd
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Priority to CN202310468895.0A priority Critical patent/CN116486748A/en
Publication of CN116486748A publication Critical patent/CN116486748A/en
Pending 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
    • G09G3/22—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]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3266—Details of drivers for scan electrodes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

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

Abstract

The application discloses a pixel driving circuit, a display panel and a driving method, wherein the pixel driving circuit comprises a plurality of driving switches, and a first driving light-emitting control module and a second driving light-emitting control module which independently work to realize the light-emitting display of a light-emitting device, the control end of the first driving switch is connected with a current line scanning line, and the input end of the first driving switch is connected with a data line; the control end of the second driving switch is connected with a transmitting line, the input end of the second driving switch is connected with the power supply module, and the output end of the second driving switch is connected with the output end of the first driving switch; and the control end of the third driving switch is connected with the scanning line on the upper line, the input end of the third driving switch is connected with the output end of the first level signal, and the output of the third driving switch is connected with the power supply module through the first storage unit. The application has set up two drive light-emitting control modules, and two sets of drive light-emitting control modules work respectively at different moments, have avoided only using a drive light-emitting control module to probably cause work load big, appear ageing easily, problem that life is short.

Description

Pixel driving circuit, display panel and driving method
Technical Field
The present disclosure relates to the field of display technologies, and in particular, to a pixel driving circuit, a display panel, and a driving method.
Background
An OLED (Organic Light-Emitting Diode) screen is receiving a great deal of attention because of its advantages of thinness, flexibility, gorgeous color, high contrast, fast response speed, wide viewing angle, etc., and has a tendency to become a representative of next-generation display, gradually replacing LCD (Liquid Crystal Display) screens.
At present, the main current OLED has a small size, and the circuit driving part (described in a unit of one sub-pixel) of the display area mainly comprises a thin film transistor for controlling whether the OLED emits light, a thin film transistor for controlling the current flowing through the OLED device, and a thin film transistor for controlling and compensating the threshold voltage Vth of the thin film transistor for controlling the current flowing through the OLED device, wherein the thin film transistor for controlling the current flowing through the OLED device is the only device for controlling the current output by voltage, and the device is aged due to long service time, and the characteristics are changed, so that the normal display is affected.
Disclosure of Invention
The application aims to provide a pixel driving circuit, a display panel and a driving method, which aim to reduce the working time of a thin film transistor for controlling the current flowing through an OLED device, so as to avoid ageing caused by long service time of the device and influence the display effect.
The application discloses a pixel driving circuit, which comprises a first driving switch, a second driving switch, a third driving switch, a first driving light-emitting control module, a second driving light-emitting control module and a light-emitting device; the control end of the first driving switch is connected with the current line scanning line, and the input end of the first driving switch is connected with the data line; the control end of the second driving switch is connected with a transmitting line, the input end of the second driving switch is connected with the power supply module, and the output end of the second driving switch is connected with the output end of the first driving switch; the control end of the third driving switch is connected with the scanning line on the upper line, the input end of the third driving switch is connected with the output end of the first level signal, and the output of the third driving switch is connected with the power supply module through the first storage unit;
the first control end of the first driving light-emitting control module is connected with a first scanning control line, the second control end of the first driving light-emitting control module is connected with the power supply module through the first storage unit, the third control end of the first driving light-emitting control module is connected with a first emission control line, and the input end of the first driving light-emitting control module is connected with the output end of the first driving switch; the first control end of the second driving light-emitting control module is connected with a second scanning control line, the second control end is connected with the power supply module through the first storage unit, the third control end is connected with a second emission control line, and the input end is connected with the output end of the first driving switch; the anode of the light emitting device is respectively connected with the output end of the first driving light emitting control module, and the cathode is connected with the output end of the second level signal; the first driving light-emitting control module and the second driving light-emitting control module work independently to realize light-emitting display of the light-emitting device.
Optionally, the first driving light-emitting control module includes a fourth driving switch, a fifth driving switch and a sixth driving switch; the control end of the fourth driving switch is connected with the first scanning control line, and the output end of the fourth driving switch is connected between the first storage unit and the output end of the third driving switch; the control end of the fifth driving switch is connected between the first storage unit and the output end of the third driving switch, the output end of the fifth driving switch is connected between the input ends of the fourth driving switch, and the input end of the fifth driving switch is connected with the output end of the first driving switch; the control end of the fourth driving switch is connected with the first emission control line, the output end of the fourth driving switch is connected with the anode of the light-emitting device, and the input end of the fourth driving switch is respectively connected with the input end of the fifth driving switch; the second driving light-emitting control module comprises a seventh driving switch, an eighth driving switch and a ninth driving switch; the control end of the seventh driving switch is connected with the second scanning control line, and the output end of the seventh driving switch is connected between the first storage unit and the output end of the third driving switch; the control end of the eighth driving switch is connected between the first storage unit and the output end of the third driving switch, the output end of the eighth driving switch is connected between the input ends of the seventh driving switch, and the input end of the eighth driving switch is connected with the output end of the first driving switch; and the control end of the ninth driving switch is connected with the second emission control line, the output end of the ninth driving switch is connected with the anode of the light emitting device, and the input end of the ninth driving switch is respectively connected with the input end of the seventh driving switch and the output end of the eighth driving switch.
Optionally, the pixel driving circuit further includes a tenth driving switch, a control end of the tenth driving switch is connected to the current line scanning line, an output end of the tenth driving switch is connected to an anode of the light emitting device, and an input end of the tenth driving switch is connected to an output end of the third level signal; the output end of the third level signal and the output end of the first level signal receive the same level signal with the same voltage value.
Optionally, the first driving switch, the second driving switch, the third driving switch, the fourth driving switch, the fifth driving switch, the sixth driving switch, the seventh driving switch, the eighth driving switch and the ninth driving switch are all P-type MOS transistors; the light emitting device is an organic light emitting diode, and the first level signal is a low level signal.
Optionally, the pixel driving circuit further includes a switching module, where the switching module is connected to the first driving light emitting control module and the second driving light emitting control module respectively, and controls the first driving light emitting control module and the second driving light emitting control module to work in a time-sharing manner; the switching module comprises a detection unit, wherein the detection unit is used for detecting a frame start signal or electric signals of the first driving light-emitting control module and the second driving light-emitting control module; if the current frame works by using the first driving light-emitting control module, when the next frame start signal is detected, the first driving light-emitting control module is closed, and the second driving light-emitting control module is started to work in the next frame; if the current frame works by using the first driving light-emitting control module, detecting that the electrical signal of the first driving light-emitting control module is abnormal, closing the first driving light-emitting control module, and starting the second driving light-emitting control module to work in the next frame; and if the electric signal of the first driving light-emitting control module is detected to be normal, selecting to continue to use the first driving light-emitting control module or starting the second driving light-emitting control module to work in the next frame.
Optionally, the switching module includes a scan control signal output unit, an emission control signal output unit, a first low voltage output unit, a first set of switch control units, and a second set of switch control units; the first group of switch control units and the second group of switch control units comprise a first control switch and a second control switch; the control ends of the two first control switches are connected with first control signals, the control ends of the two second control switches are connected with second control signals, and the first control signals and the second control signals are generated by the detection unit; the input end of a first control switch of the first group of switch control units is respectively connected with the scanning control signal unit and the emission control signal unit, and the output end of the first control switch of the first group of switch control units is respectively connected with the first scanning control line and the first emission control line; the input end of a second control switch of the first group of switch control units is connected with a first low-voltage output unit, and the output end of the second control switch of the first group of switch control units is respectively connected with the first scanning control line and the first emission control line; the input end of a first control switch of the second group of switch control units is connected with a first low-voltage output unit, and the output end of the first control switch is respectively connected with the second scanning control line and the second emission control line; and the input end of a second control switch of the second group of switch control units is respectively connected with the scanning control signal unit and the emission control signal unit, and the output end of the second control switch of the second group of switch control units is respectively connected with the second scanning control line and the second emission control line.
The application also discloses a display panel, display panel includes a plurality of arbitrary pixel drive circuit above, display panel still includes many scanning lines, many data lines, many transmission control lines and many scanning control lines, every pixel drive circuit includes a plurality of signal input part, a plurality of signal input part respectively with two that correspond scanning line, two transmission control lines, two scanning control lines, one the data line and one the transmission line is connected.
The application also discloses a driving method for driving the pixel driving circuit according to any one of the above, the driving method comprising the steps of:
detecting working states of a first driving light-emitting control module and a second driving light-emitting control module in a pixel driving circuit of a current frame; if the current frame is the first driving light-emitting control module to work, when the pixel driving circuit of the next frame drives, the first driving light-emitting control module is closed, and the second driving light-emitting control module is started to work so as to control the corresponding light-emitting device to emit light for display.
Optionally, detecting the working states of the first driving light-emitting control module and the second driving light-emitting control module in the pixel driving circuit of the current frame; if the current frame is the first driving light-emitting control module to work, when the pixel driving circuit of the next frame drives, the first driving light-emitting control module is closed, and the second driving light-emitting control module is started to work, so that the step of controlling the corresponding light-emitting device to emit light and display comprises the following steps:
Corresponding to the current frame, the scanning line of the previous line outputs a scanning signal, the third driving switch is controlled to be turned on, the first level signal output by the output end of the first level signal resets the first storage unit, the fifth driving switch is turned on, and the output ends of the first driving switch and the second driving switch are reset;
the current line scanning line outputs a scanning signal to control the first driving switch to be turned on, the first scanning control line outputs a first scanning control signal to control the fourth driving switch to be turned on, and the data voltage charges the first storage unit through the first driving switch and the fourth driving switch;
the first emission control line outputs a first emission control signal to control the sixth driving switch to be turned on, and the voltage on the power supply module controls the light emitting device to emit light through the second driving switch, the fifth driving switch and the sixth driving switch;
after the display of the current frame is finished, turning off control signals output by the first scanning line control line and the first emission control line;
corresponding to the next frame, the scanning line of the previous line outputs a scanning signal, the third driving switch is controlled to be turned on, the first level signal output by the output end of the first level signal resets the first storage unit, the eighth driving switch is turned on, and the output ends of the first driving switch and the second driving switch are reset;
The current line scanning line outputs a scanning signal to control the first driving switch to be turned on, the second scanning control line outputs a second scanning control signal to control the seventh driving switch to be turned on, and the data voltage charges the first storage unit through the first driving switch and the seventh driving switch; and
the second emission control line outputs a second emission control signal to control the ninth driving switch to be turned on, and the voltage on the power supply module controls the light emitting device to emit light through the second driving switch, the eighth driving switch and the ninth driving switch.
Optionally, detecting the working states of the first driving light-emitting control module and the second driving light-emitting control module in the pixel driving circuit of the current frame; if the current frame is the first driving light-emitting control module to work, when the pixel driving circuit of the next frame drives, the first driving light-emitting control module is closed, and the second driving light-emitting control module is started to work, so that the step of controlling the corresponding light-emitting device to emit light and display comprises the following steps:
a driving light emitting control module detecting an operation in a pixel driving circuit of a current frame;
If the current frame works by using the first driving light-emitting control module, determining the driving light-emitting control module used by the next frame by detecting a frame start signal or an electric signal of the first driving light-emitting control module;
when the frame starting signal of the next frame is detected, the first driving light-emitting control module is closed, and the second driving light-emitting control module is started to work in the next frame;
if the electric signal of the first driving light-emitting control module is detected to be abnormal, the first driving light-emitting control module is closed, and the second driving light-emitting control module is started to work in the next frame; and if the electric signal of the first driving light-emitting control module is detected to be normal, selecting to continue to use the first driving light-emitting control module or starting the second driving light-emitting control module to work in the next frame.
For the thin film transistor that is only equipped with a control and flows through OLED device electric current size, this application has set up two drive luminescence control modules, two drive luminescence control modules are all including a thin film transistor that is used for controlling and flows through OLED device electric current size, two sets of drive luminescence control modules independently work, can work respectively at different moments, and then the operating pressure of the thin film transistor in two sets of drive modules has been reduced, the length of time of the use that is used for controlling the thin film transistor that flows through OLED device electric current size has been reduced, thereby avoided only using a drive luminescence control module to probably cause work load big, ageing easily appears, the problem of life weak point, not only improved the operating time of the thin film transistor in the drive luminescence module, still further improved display panel's life and display effect.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained from these drawings without inventive faculty for a person skilled in the art. In the drawings:
fig. 1 is a schematic diagram of a pixel driving circuit according to a first embodiment of the present application;
fig. 2 is a schematic structural diagram of a pixel driving circuit according to a second embodiment of the present application;
fig. 3 is a schematic structural diagram of a pixel driving circuit of a third embodiment of the present application;
fig. 4 is a schematic structural diagram of a switching module according to a third embodiment of the present application;
fig. 5 is a schematic structural view of a display panel according to a fourth embodiment of the present application;
FIG. 6 is a flow chart of a driving method of a fifth embodiment of the present application;
FIG. 7 is a schematic diagram of a voltage signal waveform of a fifth embodiment of the present application;
FIG. 8 is a schematic diagram of a voltage signal waveform (including a control signal) of a fifth embodiment of the present application;
Fig. 9 is a flowchart of a driving method of the sixth embodiment of the present application.
100, a pixel driving circuit; 110. a first driving light emitting control module; 120. a second driving light emitting control module; 130. a first storage unit; 140. a power supply module; 150. a switching module; 160. a detection unit; 170. a scan control signal output unit; 180. a transmission control signal output unit; 190. a first low voltage output unit; 200. a light emitting device; 210. a first set of switch control units; 220. a second set of switch control units; 300. a display panel; 310. a scanning line; 320. a data line; 330. a transmission line; 340. a transmission control line; 350. scanning a control line;
t1-a first drive switch; t2-a second drive switch; t3-a third drive switch; t4-fourth drive switch; t5-fifth drive switch; t6-sixth drive switch; t7-seventh drive switch; t8-eighth drive switch; t9-ninth drive switches; t10-tenth drive switch; OLED-light emitting diode; c-capacitance; cr 1-a first control signal; cr 2-a second control signal; tn1/Tn 3-first control switch; tn2/Tn 4-second control switch.
Detailed Description
It should be understood that the terminology, specific structural and functional details disclosed herein are merely representative for purposes of describing particular embodiments, but that the application may be embodied in many alternate forms and should not be construed as limited to only the embodiments set forth herein.
The present application is described in detail below with reference to the attached drawings and alternative embodiments.
As shown in fig. 1, as a first embodiment of the present application, a pixel driving circuit 100 is disclosed, the pixel driving circuit 100 including a first driving switch T1, a second driving switch T2, a third driving switch T3, a first driving light emission control module 110, a second driving light emission control module 120, and a light emitting device 200; the control end of the first driving switch T1 is connected to the current line scanning line 310, and the input end is connected to the data line 320; the control end of the second driving switch T2 is connected with a transmitting line 330, the input end of the second driving switch T2 is connected with the power supply module 140, and the output end of the second driving switch T1 is connected with the output end of the first driving switch T1; the control end of the third driving switch T3 is connected to the previous row of scanning lines 310, the input end is connected to the output end of the first level signal, and the output is connected to the power supply module 140 through the first storage unit 130; the output end of the first level signal outputs a first level signal VINT1 to the input end of the third driving switch T3, the control end of the current row SCAN line 310 outputs a SCAN signal SCAN (n) to the first driving switch T1 to control the on or off of the first driving switch T1, the control end of the previous SCAN line 310 outputs a SCAN signal SCAN (n-1) to the third driving switch T3 to control the on or off of the third driving switch T3, the data line 320 outputs a data signal data to the input end of the first driving switch T1, the power supply module 140 outputs a power supply voltage ELVDD to the source of the second driving switch T2 and the first storage unit 130, and the control end of the transmission line 330 outputs a transmission signal EM (n) to the second driving switch T2 to control the on or off of the second driving switch T2.
A first control end of the first driving light-emitting control module 110 is connected with a first scanning control line 350, a second control end is connected with the power supply module 140 through the first storage unit 130, a third control end is connected with a first emission control line 340, and an input end is connected with an output end of the first driving switch T1; the first SCAN control line 350 outputs a first SCAN control signal SCAN (n) 1 to a first control end of the first driving light emitting control module 110, the first emission control line 340 outputs a first emission control signal EM (n) 1 to a third control end of the first driving light emitting control module 110, the first control end of the second driving light emitting control module 120 is connected to the second SCAN control line 350, the second control end is connected to the power supply module 140 through the first storage unit 130, the third control end is connected to the second emission control line 340, and the input end is connected to the output end of the first driving switch T1; the second SCAN control line 350 outputs a second SCAN control signal SCAN (n) 2 to the first control terminal of the second driving light emitting control module 120, and the second emission control line 340 outputs a second emission control signal EM (n) 2 to the third control terminal of the second driving light emitting control module 120.
The anode of the light emitting device 200 is connected with the output end of the first driving light emitting control module 110, and the cathode is connected with the output end of the second level signal; the second level signal is ELVSS, where the first driving light-emitting control module 110 and the second driving light-emitting control module 120 independently operate to implement light-emitting display of the light-emitting device 200; the two driving light-emitting control modules respectively comprise a thin film transistor for controlling the current flowing through the OLED device, the two groups of driving light-emitting control modules work independently and can work respectively at different moments, so that the working pressure of the thin film transistors in the two groups of driving modules is reduced, the use time of the thin film transistors for controlling the current flowing through the OLED device is reduced, the problems that the work load is large, ageing is easy to occur and the service life is short due to the fact that only one driving light-emitting control module is used are avoided, the working time of the thin film transistors in the driving light-emitting modules is prolonged, and the service life and the display effect of the display panel 300 are further prolonged.
Specifically, the first driving light-emitting control module 110 includes a fourth driving switch T4, a fifth driving switch T5, and a sixth driving switch T6; the control end of the fourth driving switch T4 is connected to the first scan control line 350, and the output end is connected between the first storage unit 130 and the output end of the third driving switch T3; the control end of the fifth driving switch T5 is connected between the first storage unit 130 and the output end of the third driving switch T3, the output end is connected between the input ends of the fourth driving switch T4, and the input end is connected with the output end of the first driving switch T1; the control end of the fourth driving switch T4 is connected to the first emission control line 340, the output end is connected to the anode of the light emitting device 200, and the input end is connected to the input end of the fourth driving switch T4 and the output end of the fifth driving switch T5, respectively; the second driving light emitting control module 120 includes a seventh driving switch T7, an eighth driving switch T8, and a ninth driving switch T9; the control end of the seventh driving switch T7 is connected to the second scan control line 350, and the output end is connected between the first storage unit 130 and the output end of the third driving switch T3; the control end of the eighth driving switch T8 is connected between the first storage unit 130 and the output end of the third driving switch T3, the output end is connected between the input ends of the seventh driving switch T7, and the input end is connected with the output end of the first driving switch T1; the control end of the ninth driving switch T9 is connected to the second emission control line 340, the output end is connected to the anode of the light emitting device 200, and the input end is connected to the input end of the seventh driving switch T7 and the output end of the eighth driving switch T8, respectively; the two drive luminescence control modules are alternately used, and the drive switches of the two drive luminescence control modules are also alternately used, so that the situation that a group of drive switches are used for a long time and ageing is easier to occur is avoided, only one drive luminescence control module is added at present, m can be theoretically increased, the service life of the drive switch of each drive luminescence control module is increased by m times, ageing can be reduced by m times, and considering that one sub-pixel cannot be infinitely arranged in practice, only one drive luminescence control module is preferably added.
It should be noted that, in the embodiment, the first driving switch T1, the second driving switch T2, the third driving switch T3, the fourth driving switch T4, the fifth driving switch T5, the sixth driving switch T6, the seventh driving switch T7, the eighth driving switch T8 and the ninth driving switch T9 are all P-type MOS transistors; the light emitting device 200 is an organic light emitting diode OLED, and the first level signal is a low level signal, because the OLED light emission is determined by the voltage difference between the cathode and the anode of the OLED, in order to avoid voltage loss, the driving switches used in this embodiment are all P-type MOS transistors, which is not illustrated, the scheme of this embodiment is limited to the use of P-type MOS transistors, and N-type MOS transistors are also suitable after changing the waveform of the corresponding signal.
Considering that the OLED voltage is not triggered by mistake, the pixel driving circuit 100 further includes a tenth driving switch T10, where a control end of the tenth driving switch T10 is connected to the current line scan line 310, an output end is connected to the anode of the light emitting device 200, and an input end is connected to an output end of the third level signal; the output end of the third level signal and the output end of the first level signal receive the same level signal with the same voltage value, and the first level signal is the same voltage value. The first level signal output by the output end of the level signal is VINT1, the third level signal output by the output end of the third level signal is VINT2, the two signals are generally the same voltage, and the same signal line is used for supplying power; in addition, for the VINT2 voltage, the voltage limitation that keeps the OLED voltage from being erroneously triggered during the reset period of the OLED device, and the voltage limitation that the OLED device emits light is that the anode voltage minus the cathode voltage is greater than the threshold voltage of the OLED, and the threshold voltage is a positive voltage, it is known that, in order to ensure that the OLED is not erroneously triggered to be light before the sixth driving switch T6 or the ninth driving switch T9 is turned on, the anode voltage VINT2 may be not greater than the ELVSS cathode voltage, and then vint2=elvss voltage.
As shown in fig. 2, as a second embodiment of the present application, unlike the first embodiment described above, the second driving switch T2 is connected to the first emission control signal line, and the sixth driving switch T6 is connected to the emission line 330, that is, by adjusting the connection of the driving switch of the first embodiment and the corresponding signal line, a pixel driving circuit 100 as shown in fig. 2 can be obtained, and the pixel driving circuit 100 in fig. 2 can achieve the same effect as the pixel driving circuit 100 in fig. 1.
As shown in fig. 3, as a third embodiment of the present application, which is a further refinement and improvement of the first embodiment, the pixel driving circuit 100 further includes a switching module 150, where the switching module 150 is connected to the first driving light emitting control module 110 and the second driving light emitting control module 120, and controls the first driving light emitting control module 110 and the second driving light emitting control module 120 to operate in a time sharing manner; the switching module 150 includes a detecting unit 160, where the detecting unit 160 is configured to detect a frame start signal or electrical signals of the first driving light-emitting control module 110 and the second driving light-emitting control module 120; if the current frame works by using the first driving light-emitting control module 110, when the next frame starting signal is detected, the first driving light-emitting control module 110 is closed, and the second driving light-emitting control module 120 is started to work in the next frame; if the current frame works by using the first driving light-emitting control module 110, and the electrical signal of the first driving light-emitting control module 110 is detected to be abnormal, the first driving light-emitting control module 110 is closed, and the second driving light-emitting control module 120 is started to work in the next frame; if the electrical signal of the first driving light emitting control module 110 is detected to be normal, the first driving light emitting control module 110 is selected to be used continuously, or the second driving light emitting control module 120 is started to work in the next frame.
Further, referring to fig. 4, the switching module 150 includes a scan control signal output unit 170, an emission control signal output unit 180, a first low voltage output unit 190, a first group of switch control units 210, and a second group of switch control units 220; the first set of switch control units 210 and the second set of switch control units 220 each include a first control switch and a second control switch; the control ends of the two first control switches are connected with a first control signal Cr1, the control ends of the two second control switches are connected with a second control signal Cr2, and the first control signal Cr1 and the second control signal Cr2 are generated by the detection unit 160; an input end of a first control switch of the first group of switch control units 210 is respectively connected with the scan control signal unit and the emission control signal unit, and an output end thereof is respectively connected with the first scan control line 350 and the first emission control line 340; an input end of the second control switch of the first group of switch control units 210 is connected to the first low voltage output unit 190, and output ends thereof are respectively connected to the first scan control line 350 and the first emission control line 340; an input end of a first control switch of the second group of switch control units 220 is connected to the first low voltage output unit 190, and output ends thereof are respectively connected to the second scan control line 350 and the second emission control line 340; the input ends of the second control switches of the second set of switch control units 220 are respectively connected to the scan control signal unit and the emission control signal unit, and the output ends thereof are respectively connected to the second scan control line 350 and the second emission control line 340.
As shown in fig. 5, as a fourth embodiment of the present application, the present application further discloses a display panel 300, where the display panel 300 includes a plurality of pixel driving circuits 100 as described in any of the above embodiments, the display panel 300 further includes a plurality of scan lines 310, a plurality of data lines 320, a plurality of emission lines 330, a plurality of emission control lines 340, and a plurality of scan control lines 350, each of the pixel driving circuits 100 includes a plurality of signal input terminals respectively connected to the corresponding two scan lines 310, two emission control lines 340, two scan control lines 350, one of the data lines 320, and one of the emission lines 330, and specifically, referring to the connection in fig. 1, it should be emphasized that each row of pixels corresponds to a set of signal lines including the two scan lines 310, the two emission control lines 340, the two scan control lines 350, one of the data lines 320, and one of the emission lines 330, and all signals in the signal lines are cascade waveforms corresponding to the corresponding scan lines 310.
As a fifth embodiment of the present application, the present application also discloses a driving method for driving the pixel driving circuit described in any one of the above, the driving method comprising the steps of:
S1: detecting working states of a first driving light-emitting control module and a second driving light-emitting control module in a pixel driving circuit of a current frame; if the current frame is the first driving light-emitting control module to work, when the pixel driving circuit of the next frame drives, the first driving light-emitting control module is closed, and the second driving light-emitting control module is started to work so as to control the corresponding light-emitting device to emit light for display.
If a plurality of driving light-emitting control modules are arranged, one driving light-emitting control module is used for a period of time, the other driving light-emitting control module is used for a period of time, and switching is automatically performed, so that the use frequency of a Thin Film Transistor (TFT) device of each driving light-emitting control module is reduced, the aging degree of the TFT device in the corresponding driving light-emitting control module is reduced, the screen is prevented from being used for a long time enough, the device is aged, the device characteristics are changed, the control on current is changed, the output characteristic curve is drifted, and the phenomenon is unrecoverable for a long time when the screen is shut down, so that the service life of a display panel is influenced.
As shown in fig. 6, the step S1 includes:
s11: corresponding to the current frame, the scanning line of the previous line outputs a scanning signal, the third driving switch is controlled to be turned on, the first level signal output by the output end of the first level signal resets the first storage unit, the fifth driving switch is turned on, and the output ends of the first driving switch and the second driving switch are reset;
S12: the current line scanning line outputs a scanning signal to control the first driving switch to be turned on, the first scanning control line outputs a first scanning control signal to control the fourth driving switch to be turned on, and the data voltage charges the first storage unit through the first driving switch and the fourth driving switch;
s13: the first emission control line outputs a first emission control signal to control the sixth driving switch to be turned on, and the voltage on the power supply module controls the light emitting device to emit light through the second driving switch, the fifth driving switch and the sixth driving switch;
s14: after the display of the current frame is finished, turning off control signals output by the first scanning line control line and the first emission control line;
s15: corresponding to the next frame, the scanning line of the previous line outputs a scanning signal, the third driving switch is controlled to be turned on, the first level signal output by the output end of the first level signal resets the first storage unit, and the eighth driving switch is turned on to reset the output ends of the first driving switch and the second driving switch;
s16: the current line scanning line outputs a scanning signal to control the first driving switch to be turned on, the second scanning control line outputs a second scanning control signal to control the seventh driving switch T7 to be turned on, and the data voltage charges the first storage unit through the first driving switch and the seventh driving switch; and
S17: the transmitting line 330 outputs a transmitting signal to control the second driving switch to be turned on, the second transmitting control line outputs a second transmitting control signal to control the ninth driving switch to be turned on, and the voltage on the power supply module controls the light emitting device to emit light through the second driving switch, the eighth driving switch and the ninth driving switch.
Referring to fig. 1, 6 and 7, a second driving control light emitting module is newly added, wherein the second driving control light emitting module includes a seventh driving switch T7, an eighth driving switch T8 and a ninth driving switch T9, and functions the same as the fourth driving switch T4, the fifth driving switch T5 and the sixth driving switch T6 in the first driving control light emitting module respectively, and specific control time sequences are implemented as follows:
SCAN (n) 1& em (n) 1 and SCAN (n) 2& em (n) 2 are used alternately; SCAN (n) 1& EM (n) 1 and SCAN (n) 2& EM (n) 2 are alternately equal to SCAN (n) & EM (n), and specific waveforms are shown in fig. 7;1frame (within a frame), SCAN (n) 1& em (n) 1 controls the corresponding fourth, fifth and sixth driving switches T4, T5, T6 to operate, the fifth driving switch T5 being used and the eighth driving switch T8 being closed; the next frame, SCAN (n) 2& em (n) 2, controls the operation of the corresponding seventh, eighth and ninth drive switches T7, T8, T9, the eighth drive switch T8 being used and the fifth drive switch T5 being closed.
Further, in order to realize a plurality of control timing waveforms required by implementation, a means for realizing, but not limited to, sequential logic of SCAN (n)/EM (n) and SCAN (n) 1/EM (n) 1, and SCAN (n) 2/EM (n) 2 is provided; the original SCAN (n)/EM (n) (SCAN and EM are needed and must be separated, and because the two are designed consistently, only one diagram is used for representing) output end, the change shown in figure 8 is made, tn 1-4 switches are newly added, and a closing voltage input end is added, namely if the TFT in the background 1 is PMOS, the voltage is VGH, and if the TFT in the background 1 is NMOS, the voltage is VGL;
referring to fig. 1, 4, 7 and 8, a first control signal Cr1 and a second control signal Cr2 are newly added to each row, and if the waveforms of fig. 7 need to be outputted, cr1 and Cr2 need to be switched once in one frame; i.e. in the first frame, cr1 is low and Cr2 is high, then Tn1& Tn3 are open and Tn2& Tn4 are closed; then SCAN (n) 1/EM (n) 1 is equal to SCAN (n) and EM (n), SCAN (n) 2/EM (n) 2 is low; in the second frame, cr1 is high, cr2 is low, tn2& Tn4 is open, tn1& Tn3 is closed; then SCAN (n) 2/EM (n) 2 is equal to SCAN (n) and EM (n), SCAN (n) 1/EM (n) 1 is low.
As shown in fig. 9, as a sixth embodiment of the present application, unlike the above-described embodiment, the driving method or step S1 includes the steps of:
S191: a driving light emitting control module detecting an operation in a pixel driving circuit of a current frame;
s192: if the current frame works by using the first driving light-emitting control module, determining the driving light-emitting control module used by the next frame by detecting a frame start signal or an electric signal of the first driving light-emitting control module;
s193: when the frame starting signal of the next frame is detected, the first driving light-emitting control module is closed, and the second driving light-emitting control module is started to work in the next frame;
s194: if the electric signal of the first driving light-emitting control module is detected to be abnormal, the first driving light-emitting control module is closed, and the second driving light-emitting control module is started to work in the next frame; and if the electric signal of the first driving light-emitting control module is detected to be normal, selecting to continue to use the first driving light-emitting control module or starting the second driving light-emitting control module to work in the next frame.
Unlike the fifth embodiment described above, the present embodiment is not limited to the alternate use of the driving light emitting control modules for two frames, but may be one in which one driving light emitting control module continuously operates for 1 frame, 2 frames or more, and when the electric signal value, such as the current value or the voltage value, exceeds a preset value at the time of discovery of operation, the workload of the driving light emitting control module is reduced, and after a period of time, the driving light emitting control module having abnormality detected before is activated is restarted.
Regarding the detection of the electric signal of the driving light-emitting control module, the current or voltage is generally tested at the joint of the specific area, when the detected value exceeds the preset value, the driving light-emitting control module is stopped when the next detection still has abnormality, the driving light-emitting control module stops working again, and the time of stopping working is longer than the last time, so that better recovery can be realized; in addition, before the driving light-emitting control module is switched, the driving light-emitting control module which needs to work soon can be detected by an electric signal, and if the electric signal is detected, the driving light-emitting control module which does not work possibly has a partial short circuit problem, so that the switching is not performed.
It should be noted that, the limitation of each step in the present solution is not to be considered as limiting the sequence of steps on the premise of not affecting the implementation of the specific solution, and the steps written in the previous step may be executed before, may be executed after, or may even be executed simultaneously, so long as the implementation of the present solution is possible, all should be considered as falling within the protection scope of the present application.
It should be noted that, the inventive concept of the present application may form a very large number of embodiments, but the application documents have limited space and cannot be listed one by one, so that on the premise of no conflict, the above-described embodiments or technical features may be arbitrarily combined to form new embodiments, and after the embodiments or technical features are combined, the original technical effects will be enhanced.
The foregoing is a further detailed description of the present application in connection with specific alternative embodiments, and it is not intended that the practice of the present application be limited to such descriptions. It should be understood that those skilled in the art to which the present application pertains may make several simple deductions or substitutions without departing from the spirit of the present application, and all such deductions or substitutions should be considered to be within the scope of the present application.

Claims (10)

1. A pixel driving circuit, comprising:
the control end of the first driving switch is connected with the current line scanning line, and the input end of the first driving switch is connected with the data line;
the control end of the second driving switch is connected with the transmitting line, the input end of the second driving switch is connected with the power supply module, and the output end of the second driving switch is connected with the output end of the first driving switch;
the control end of the third driving switch is connected with the scanning line on the previous line, the input end of the third driving switch is connected with the output end of the first level signal, and the output of the third driving switch is connected with the power supply module through the first storage unit;
the first driving light-emitting control module is connected with a first scanning control line through the first storage unit, the second control end is connected with the power supply module through the first storage unit, the third control end is connected with a first emission control line, and the input end is connected with the output end of the first driving switch;
The first control end of the second driving light-emitting control module is connected with a second scanning control line, the second control end of the second driving light-emitting control module is connected with the power supply module through the first storage unit, the third control end of the second driving light-emitting control module is connected with a second emission control line, and the input end of the third driving light-emitting control module is connected with the output end of the first driving switch; and
the anode of the light-emitting device is respectively connected with the output end of the first driving light-emitting control module, and the cathode of the light-emitting device is connected with the output end of the second level signal;
the first driving light-emitting control module and the second driving light-emitting control module work independently to realize light-emitting display of the light-emitting device.
2. The pixel driving circuit according to claim 1, wherein the first driving light emitting control module includes a fourth driving switch, a fifth driving switch, and a sixth driving switch;
the control end of the fourth driving switch is connected with the first scanning control line, and the output end of the fourth driving switch is connected between the first storage unit and the output end of the third driving switch;
the control end of the fifth driving switch is connected between the first storage unit and the output end of the third driving switch, the output end of the fifth driving switch is connected between the input ends of the fourth driving switch, and the input end of the fifth driving switch is connected with the output end of the first driving switch;
The control end of the fourth driving switch is connected with the first emission control line, the output end of the fourth driving switch is connected with the anode of the light-emitting device, and the input end of the fourth driving switch is respectively connected with the input end of the fifth driving switch;
the second driving light-emitting control module comprises a seventh driving switch, an eighth driving switch and a ninth driving switch;
the control end of the seventh driving switch is connected with the second scanning control line, and the output end of the seventh driving switch is connected between the first storage unit and the output end of the third driving switch;
the control end of the eighth driving switch is connected between the first storage unit and the output end of the third driving switch, the output end of the eighth driving switch is connected between the input ends of the seventh driving switch, and the input end of the eighth driving switch is connected with the output end of the first driving switch;
and the control end of the ninth driving switch is connected with the second emission control line, the output end of the ninth driving switch is connected with the anode of the light emitting device, and the input end of the ninth driving switch is respectively connected with the input end of the seventh driving switch and the output end of the eighth driving switch.
3. A pixel driving circuit according to claim 1 or 2, further comprising a tenth driving switch, a control terminal of the tenth driving switch being connected to a current line, an output terminal being connected to an anode of the light emitting device, and an input terminal being connected to an output terminal of a third level signal;
The output end of the third level signal and the output end of the first level signal receive the same level signal with the same voltage value.
4. The pixel driving circuit according to claim 2, wherein the first driving switch, the second driving switch, the third driving switch, the fourth driving switch, the fifth driving switch, the sixth driving switch, the seventh driving switch, the eighth driving switch and the ninth driving switch are P-type MOS transistors;
the light emitting device is an organic light emitting diode, and the first level signal is a low level signal.
5. The pixel driving circuit according to claim 1, further comprising a switching module connected to the first driving light emission control module and the second driving light emission control module, respectively, for controlling the first driving light emission control module and the second driving light emission control module to operate in a time-sharing manner;
the switching module comprises a detection unit, wherein the detection unit is used for detecting a frame start signal or electric signals of the first driving light-emitting control module and the second driving light-emitting control module;
if the current frame works by using the first driving light-emitting control module, when the next frame start signal is detected, the first driving light-emitting control module is closed, and the second driving light-emitting control module is started to work in the next frame;
If the current frame works by using the first driving light-emitting control module, detecting that the electrical signal of the first driving light-emitting control module is abnormal, closing the first driving light-emitting control module, and starting the second driving light-emitting control module to work in the next frame; and if the electric signal of the first driving light-emitting control module is detected to be normal, selecting to continue to use the first driving light-emitting control module or starting the second driving light-emitting control module to work in the next frame.
6. The pixel driving circuit according to claim 5, wherein the switching module includes a scan control signal output unit, an emission control signal output unit, a first low voltage output unit, a first group of switch control units, and a second group of switch control units;
the first group of switch control units and the second group of switch control units comprise a first control switch and a second control switch; the control ends of the two first control switches are connected with first control signals, the control ends of the two second control switches are connected with second control signals, and the first control signals and the second control signals are generated by the detection unit;
the input end of a first control switch of the first group of switch control units is respectively connected with the scanning control signal unit and the emission control signal unit, and the output end of the first control switch of the first group of switch control units is respectively connected with the first scanning control line and the first emission control line; the input end of a second control switch of the first group of switch control units is connected with a first low-voltage output unit, and the output end of the second control switch of the first group of switch control units is respectively connected with the first scanning control line and the first emission control line;
The input end of a first control switch of the second group of switch control units is connected with a first low-voltage output unit, and the output end of the first control switch is respectively connected with the second scanning control line and the second emission control line; and the input end of a second control switch of the second group of switch control units is respectively connected with the scanning control signal unit and the emission control signal unit, and the output end of the second control switch of the second group of switch control units is respectively connected with the second scanning control line and the second emission control line.
7. A display panel comprising a plurality of pixel driving circuits according to any one of claims 1 to 6, the display panel further comprising a plurality of scan lines, a plurality of data lines, a plurality of emission control lines, and a plurality of scan control lines, each of the pixel driving circuits comprising a plurality of signal input terminals respectively connected to corresponding two of the scan lines, two of the emission control lines, two of the scan control lines, one of the data lines, and one of the emission lines.
8. A driving method for driving the pixel driving circuit according to any one of claims 1 to 6, characterized in that the driving method comprises the steps of:
Detecting working states of a first driving light-emitting control module and a second driving light-emitting control module in a pixel driving circuit of a current frame; if the current frame is the first driving light-emitting control module to work, when the pixel driving circuit of the next frame drives, the first driving light-emitting control module is closed, and the second driving light-emitting control module is started to work so as to control the corresponding light-emitting device to emit light for display.
9. The driving method as claimed in claim 8, wherein the operation states of the first driving light emitting control module and the second driving light emitting control module in the pixel driving circuit of the current frame are detected; if the current frame is the first driving light-emitting control module to work, when the pixel driving circuit of the next frame drives, the first driving light-emitting control module is closed, and the second driving light-emitting control module is started to work, so that the step of controlling the corresponding light-emitting device to emit light and display comprises the following steps:
corresponding to the current frame, the scanning line of the previous line outputs a scanning signal, the third driving switch is controlled to be turned on, the first level signal output by the output end of the first level signal resets the first storage unit, the fifth driving switch is turned on, and the output ends of the first driving switch and the second driving switch are reset;
The current line scanning line outputs a scanning signal to control the first driving switch to be turned on, the first scanning control line outputs a first scanning control signal to control the fourth driving switch to be turned on, and the data voltage charges the first storage unit through the first driving switch and the fourth driving switch;
the first emission control line outputs a first emission control signal to control the sixth driving switch to be turned on, and the voltage on the power supply module controls the light emitting device to emit light through the second driving switch, the fifth driving switch and the sixth driving switch;
after the display of the current frame is finished, turning off control signals output by the first scanning line control line and the first emission control line;
corresponding to the next frame, the scanning line of the previous line outputs a scanning signal, the third driving switch is controlled to be turned on, the first level signal output by the output end of the first level signal resets the first storage unit, the eighth driving switch is turned on, and the output ends of the first driving switch and the second driving switch are reset;
the current line scanning line outputs a scanning signal to control the first driving switch to be turned on, the second scanning control line outputs a second scanning control signal to control the seventh driving switch to be turned on, and the data voltage charges the first storage unit through the first driving switch and the seventh driving switch; and
The second emission control line outputs a second emission control signal to control the ninth driving switch to be turned on, and the voltage on the power supply module controls the light emitting device to emit light through the second driving switch, the eighth driving switch and the ninth driving switch.
10. The driving method as claimed in claim 8, wherein the operation states of the first driving light emitting control module and the second driving light emitting control module in the pixel driving circuit of the current frame are detected; if the current frame is the first driving light-emitting control module to work, when the pixel driving circuit of the next frame drives, the first driving light-emitting control module is closed, and the second driving light-emitting control module is started to work, so that the step of controlling the corresponding light-emitting device to emit light and display comprises the following steps:
a driving light emitting control module detecting an operation in a pixel driving circuit of a current frame;
if the current frame works by using the first driving light-emitting control module, determining the driving light-emitting control module used by the next frame by detecting a frame start signal or an electric signal of the first driving light-emitting control module;
when the frame starting signal of the next frame is detected, the first driving light-emitting control module is closed, and the second driving light-emitting control module is started to work in the next frame;
If the electric signal of the first driving light-emitting control module is detected to be abnormal, the first driving light-emitting control module is closed, and the second driving light-emitting control module is started to work in the next frame; and if the electric signal of the first driving light-emitting control module is detected to be normal, selecting to continue to use the first driving light-emitting control module or starting the second driving light-emitting control module to work in the next frame.
CN202310468895.0A 2023-04-19 2023-04-19 Pixel driving circuit, display panel and driving method Pending CN116486748A (en)

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CN202310468895.0A CN116486748A (en) 2023-04-19 2023-04-19 Pixel driving circuit, display panel and driving method

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