WO2020113674A1 - Circuit d'attaque de pixel et dispositif d'affichage - Google Patents

Circuit d'attaque de pixel et dispositif d'affichage Download PDF

Info

Publication number
WO2020113674A1
WO2020113674A1 PCT/CN2018/121848 CN2018121848W WO2020113674A1 WO 2020113674 A1 WO2020113674 A1 WO 2020113674A1 CN 2018121848 W CN2018121848 W CN 2018121848W WO 2020113674 A1 WO2020113674 A1 WO 2020113674A1
Authority
WO
WIPO (PCT)
Prior art keywords
thin film
node
film transistor
signal
voltage
Prior art date
Application number
PCT/CN2018/121848
Other languages
English (en)
Chinese (zh)
Inventor
李新吉
Original Assignee
深圳市华星光电半导体显示技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 深圳市华星光电半导体显示技术有限公司 filed Critical 深圳市华星光电半导体显示技术有限公司
Publication of WO2020113674A1 publication Critical patent/WO2020113674A1/fr

Links

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3266—Details of drivers for scan electrodes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • 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]
    • G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
    • G09G3/3258—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the voltage across the light-emitting element
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3275—Details of drivers for data electrodes
    • G09G3/3291—Details of drivers for data electrodes in which the data driver supplies a variable data voltage for setting the current through, or the voltage across, the light-emitting elements

Definitions

  • the present invention relates to the field of display technology, and in particular, to a pixel driving circuit and a display device.
  • Organic light emitting diode (Organic Light Emitting Display, OLED) display device has self-luminous, low driving voltage, high luminous efficiency, short response time, high definition and contrast, near 180 ° viewing angle, wide use temperature range, can be achieved Many advantages such as flexible display and large-area full-color display are recognized by the industry as the most promising display devices.
  • OLED display devices can be divided into passive matrix OLED (Passive Matrix OLED) according to the driving method
  • AMOLED has pixels arranged in an array, which is an active display type and has high luminous efficacy, and is generally used as a high-definition large-size display device.
  • AMOL ED is a current-driven device. When a current flows through the organic light-emitting diode, the organic light-emitting diode emits light, and the light emission brightness is determined by the current flowing through the organic light-emitting diode itself.
  • Most existing integrated circuits Integrated Circuit, 1C
  • the pixel driving circuit of AMOLED needs to complete the task of converting voltage signals into current signals.
  • a pixel driving circuit commonly seen includes: a first thin film transistor T10, a second thin film transistor T20, a third thin film transistor T30, a fourth thin film transistor T40, a fifth thin film transistor T50, A sixth thin film transistor T60, a storage capacitor C10, and an organic light emitting diode D10, the gate of the first thin film transistor T10 receives the scan signal Gate, the source is electrically connected to the first node A0, and the drain is electrically connected to the second section ABO
  • the gate of the second thin film transistor T20 is electrically connected to the first node AO, the drain receives the power supply high voltage Vdd, and the source is electrically connected to the second node B0;
  • the gate of the third thin film transistor T30 receives the light emitting signal EM, the source receives the data signal Data, the drain is electrically connected to the third node C0; the gate of the fourth thin film transistor T40 receives the light emitting signal EM, the source is electrically connected
  • the object of the present invention is to provide a pixel driving circuit that can adjust the light emission brightness by a high voltage of the power supply, and has a simple structure and is easy to manufacture.
  • An object of the present invention is also to provide a display device capable of adjusting light emission brightness by a high voltage of a power supply, and having a simple structure and easy manufacturing.
  • the present invention provides a pixel driving circuit, including a loading module, a compensation module electrically connected to the loading module, and a light-emitting module electrically connected to the compensation module;
  • the loading module is used to receive a reset signal and a lighting signal, and input an initialization signal to the compensation module under the control of the reset signal, and input a data signal to the compensation module under the control of the lighting signal;
  • the compensation module is used to receive a scan signal, and under the control of the scan signal, receive a high voltage of the power supply to perform a threshold voltage compensation;
  • the light emitting module is used for receiving a light emitting signal, and receiving a high voltage of the power supply and emitting light under the control of the light emitting signal, and the light emitting brightness can be adjusted by changing the magnitude of the high voltage of the power supply.
  • the compensation module includes a first thin film transistor, a second thin film transistor, and a storage capacitor;
  • the gate of the first thin film transistor receives the scan signal, the source is electrically connected to the first node, and the drain is electrically connected to the second node;
  • the gate of the second thin film transistor is electrically connected to the first node, the drain receives the high voltage of the power supply, and the source is electrically connected to the second node;
  • the first end of the storage capacitor is electrically connected to the first node, and the second end is electrically connected to the third node;
  • the loading module is electrically connected to the first node and the third node, and the light emitting module is electrically connected to the second node and the third node.
  • the light emitting module includes: a third thin film transistor, a fourth thin film transistor and an organic light emitting diode; [0017] the gate of the third thin film transistor receives a light emitting signal, the source receives a high voltage power supply, and the drain is electrically Connect the third node;
  • the gate of the fourth thin film transistor receives the light-emitting signal, the source is electrically connected to the second node, and the drain is electrically connected to the anode of the organic light-emitting diode;
  • the cathode of the organic light emitting diode receives a low power supply voltage.
  • the loading module includes: a fifth thin film transistor and a sixth thin film transistor;
  • the gate of the fifth thin film transistor receives the light-emitting signal, the source receives the data signal, and the drain is electrically connected to the third node;
  • the gate of the sixth thin film transistor receives a reset signal, the source receives an initialization signal, and the drain is electrically connected to the first node.
  • the first thin film transistor, the second thin film transistor, the third thin film transistor, the fourth thin film transistor and the sixth thin film transistor are all P -type thin film transistors, and the fifth thin film transistor is an N-type thin film transistor.
  • the working process of the pixel driving circuit includes a loading phase, a compensation phase and a light-emitting phase in sequence;
  • the reset signal is at a low potential, and the scan signal and the light-emitting signal are at a high potential;
  • the scan signal is low potential, the reset signal and the light-emitting signal are high potential;
  • the light-emitting phase In the light-emitting phase, the light-emitting signal is low potential, the scan signal and the reset signal are high Potential.
  • the voltage of the first node is Vint
  • the voltage of the third node is Vdata
  • Vint is the voltage of the initialization signal
  • Vdata is the voltage of the data signal
  • the voltage of the first node is -lWIi] :
  • the voltage of the second node is Vdd
  • the voltage of the third node is Vdata
  • Vth is the threshold voltage of the second thin film transistor
  • Vdd is the high voltage of the power supply
  • Vdata is the voltage of the data signal.
  • the voltage of the first node is The voltage of the second node is Vdd
  • the voltage of the third node is Vdd
  • vth is the threshold voltage of the second thin film transistor
  • Vdd is the high voltage of the power supply
  • Vdata is the voltage of the data signal.
  • the present invention also provides a display device including the above pixel driving circuit.
  • the present invention provides a pixel driving circuit, including a loading module, a compensation module electrically connected to the loading module, and a light-emitting module electrically connected to the compensation module;
  • the loading module is used to receive a reset signal and a light-emitting signal, and input an initialization signal to the compensation module under the control of the reset signal, and a data signal to the compensation module under the control of the light-emitting signal;
  • the compensation module is used to receive a scan signal, and Under the control of the scan signal, the high voltage of the power supply is received to perform the compensation of the threshold voltage;
  • the pixel driving circuit can not only effectively compensate the threshold power supply, but also adjust the light emission brightness through the high voltage of the power supply, and has a simple structure and is easy to manufacture.
  • the invention also provides a display device which can adjust the light-emitting brightness by the high voltage of the power supply, and has a simple structure and is easy to manufacture.
  • FIG. 1 is a circuit diagram of a conventional pixel driving circuit
  • FIG. 2 is a schematic diagram of a pixel driving circuit of the present invention.
  • FIG. 3 is a circuit diagram of a pixel driving circuit of the present invention.
  • FIG. 4 is a working waveform diagram of the pixel driving circuit of the present invention.
  • the present invention provides a pixel driving circuit, including a loading module 1, a compensation module 2 electrically connected to the loading module 1, and an electrical connection to the compensation module 2
  • the loading module 1 is configured to receive a reset signal Reset and a light-emitting signal EM, and input an initialization signal Int to the compensation module 2 under the control of the reset signal Reset, and input data to the compensation module 2 under the control of the light-emitting signal EM Signal Data;
  • the compensation module 2 is configured to receive a scanning signal Gate, and receive a power supply high voltage Vdd under the control of the scanning signal Gate to perform threshold voltage compensation;
  • the light-emitting module 3 is used to receive the light-emitting signal EM, and under the control of the light-emitting signal EM to receive the power supply high voltage Vdd and emit light, and the light emission brightness can be adjusted by changing the size of the power supply high voltage Vdd.
  • the compensation module 2 includes a first thin film transistor T1, a second thin film transistor T2 and a storage capacitor C1;
  • the gate of the first thin film transistor T1 receives the scan signal Gate, the source is electrically connected to the first node A, and the drain is electrically connected to the second node B;
  • the gate of the second thin film transistor T2 is electrically connected to the first node A, and the drain receives the power supply high voltage Vdd
  • the source is electrically connected to the second node B;
  • the first end of the storage capacitor C1 is electrically connected to the first node A, and the second end is electrically connected to the third node C;
  • the loading module 1 is electrically connected to the first node A and the third node C, and the light emitting module 3 is electrically connected to the second node B and the third node C.
  • the light emitting module 3 includes: a third thin film transistor T3, a fourth thin film transistor T4 and an organic light emitting diode D1;
  • the gate of the third thin film transistor T3 receives the light emitting signal EM, the source receives the high voltage of the power supply, and the drain is electrically connected to the third node C;
  • the gate of the fourth thin film transistor T4 receives the light emitting signal EM, the source is electrically connected to the second node B, and the drain is electrically connected to the anode of the organic light emitting diode D1;
  • the cathode of the organic light emitting diode D1 receives a power supply voltage Vss.
  • the loading module 1 includes: a fifth thin film transistor T5 and a sixth thin film transistor T6; [0054] The gate of the fifth thin film transistor T5 receives the light emitting signal EM, the source receives the data signal Data, and the drain is electrically connected to the third node C;
  • the gate of the sixth thin film transistor T6 receives a reset signal Reset, the source receives an initialization signal Int, and the drain is electrically connected to the first node A.
  • the electroluminescent element D1 is an organic light emitting diode
  • the fifth thin-film transistor T5 and the sixth thin-film transistor T6 are amorphous silicon thin-film transistors, deuterium polysilicon thin-film transistors, or metal oxide semiconductor thin-film transistors.
  • the first thin film transistor T1, the second thin film transistor T2, the third thin film transistor T3 , the fourth thin film transistor T4 and the sixth thin film transistor T6 are all P-type thin film transistors, It is turned on in a deuterium level state and turned off in a high level state.
  • the fifth thin film transistor T5 is an N-type thin film transistor, which is turned on in a high state state and turned off in a deuterium level state.
  • the reset signal Reset, the scanning signal Gate, and the light emitting signal EM are all provided by an external timing controller.
  • the working process of the pixel driving circuit includes a loading stage 10, a compensation stage 20 and a light-emitting stage 30 in sequence;
  • the reset signal Reset is at a low potential
  • the scan signal Gate and the light emitting signal EM are at a high potential
  • the data signal Data is written to the third node C for initialization
  • the signal In t is written into the first node A
  • the initialization signal is an Int-level signal.
  • the scan signal Gate is at a low potential
  • the reset signal Reset and the light-emitting signal EM are at a high potential
  • the power supply high voltage Vdd is written to the second node B
  • the third node continues to write the data signal Data, so that the voltage of the first node A becomes the absolute value of the power supply high voltage Vdd and the threshold voltage of the second thin film transistor T2 (the threshold voltage of the P-type thin film transistor is negative) difference.
  • the light-emitting signal EM is at a low potential
  • the scan signal Gate and the reset signal Reset are at a high potential
  • the power supply high voltage Vdd is written to the third node C, so that The voltage of the first node A changes accordingly, and drives the organic light emitting diode D1 to emit light.
  • the reset signal Reset is a low potential
  • the scan signal Gate and the light-emitting signal EM are a high potential
  • the sixth thin film transistor T6 and the fourth thin film transistor T4 is turned on
  • the first thin film transistor T1, the third thin film transistor T3, and the fifth thin film transistor T5 are turned off
  • the initialization signal Int is written into the first node A through the turned on fourth thin film transistor T4, so that the first node A
  • the data signal Data is written into the third node C through the turned-on sixth thin film transistor T6, so that the voltage of the third node C becomes Vdata, where Vint is the voltage of the initialization signal Int, and Vdata is the data signal Dat a Voltage, and Vint is the voltage level.
  • the scan signal Gate is at a low potential
  • the reset signal Reset and the light-emitting signal EM are at a high potential
  • the first node A is at a low level
  • the sixth thin film transistor T6 the second The thin film transistor T2 and the third thin film transistor T3 are turned on
  • the first thin film transistor T1 the fourth thin film transistor T4 and the fifth thin film transistor T5 are turned off
  • the data signal Data continues to be written into the third through the turned on sixth thin film transistor T6 Node C, so that the voltage of the third node C continues to be Vdata
  • the power supply high voltage Vdd charges the first node A through the second thin film transistor T2 and the third thin film transistor T3, until the first node A and the second node
  • the difference of B is equal to the threshold voltage of the second thin film transistor T2, that is, the voltage of the first node A is complement
  • the voltage of the second node B is Vdd
  • the voltage stored by the storage capacitor C1 is Vdd-1Vth1-Vdata
  • the voltage of the third node C is Vdata, where Vth is the threshold voltage of the second thin film transistor T2;
  • the light-emitting signal EM is low; the potential, the scan signal Gate and the reset signal Re set are high potential, the first thin-film transistor T1, the second thin-film transistor T2 and the fifth thin-film transistor T5 conduct On, the third thin film transistor T3, the fourth thin film transistor T4, and the sixth thin film transistor T6 are turned off, and the power supply high voltage Vdd is written into the third node C through the turned-on fifth thin film transistor T5, under the action of the storage capacitor C1
  • the voltage of the first node A changes with the change of the third node C to keep the voltage stored in the storage capacitor C1 unchanged, that is, the voltage of the first node A is
  • the voltage of the second node B is Vdd
  • the voltage of the third node C is Vdd
  • the current flowing through the organic light emitting diode D1 is:
  • H is the carrier mobility of the second thin film transistor T2
  • Cox is the gate oxide layer capacitance of the second thin film transistor T2
  • W/L is the channel width-to-length ratio of the second thin film transistor T2
  • I is The current flowing through the organic light emitting diode D1, Vgs, is the voltage difference between the gate and the source of the second thin film transistor T2.
  • the current I flowing through the organic light emitting diode D1 has nothing to do with the threshold voltage Vth of the second thin film transistor T2, so that the problem of poor display of the screen caused by the change in the threshold voltage Vth of the second thin film transistor T2 can be eliminated ,
  • the current I flowing through the organic light emitting diode D1 is simultaneously affected by the power supply high voltage Vdd and the voltage Vdata of the data signal Data, so the current I flowing through the organic light emitting diode D1 can be changed by changing the voltage of the power high voltage Vdd and the data signal Data Vdata is changed, so that the brightness of the organic light-emitting diode D1 can be adjusted by changing the size of the power supply high voltage Vdd, and the flexibility of brightness adjustment can be improved.
  • no additional signal lines are required, and the process is more difficult.
  • the present invention also provides a display device including the above pixel driving circuit.
  • the present invention provides a pixel driving circuit, including a loading module, a compensation module electrically connected to the loading module, and a light-emitting module electrically connected to the compensation module;
  • the input module is used to receive the reset signal and the light-emitting signal, and input the initialization signal to the compensation module under the control of the reset signal, and input the data signal to the compensation module under the control of the light-emitting signal;
  • the compensation module is used to receive the scan signal, and Under the control of the scanning signal, the high voltage of the power supply is received to perform the compensation of the threshold voltage;
  • the light emitting module is used to receive the light emitting signal and receive the high voltage of the power supply and emit light under the control of the light emitting signal, and the brightness of the light can be changed by changing the size of the high voltage
  • the pixel driving circuit can not only effectively compensate the threshold power supply, but also adjust the light emission brightness through the high voltage of the power supply, and has a simple structure and is easy to manufacture.
  • the invention also provides a

Landscapes

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

Abstract

L'invention concerne un circuit d'attaque de pixel et un dispositif d'affichage. Le circuit d'attaque de pixel comprend un module de chargement (1), un module de compensation (2) connecté électriquement au module de chargement (1), et un module électroluminescent (3) connecté électriquement au module de compensation (2); le module de chargement (1) est configuré pour recevoir un signal de réinitialisation (Reset) et un signal d'émission de lumière (EM), appliquer un signal d'initialisation (Int) au module de compensation (2) sous la commande du signal de réinitialisation (Reset), et appliquer un signal de données (Data) au module de compensation (2) sous la commande du signal d'émission de lumière (EM); le module de compensation (2) est configuré pour recevoir un signal de balayage (Gate), et recevoir une tension d'alimentation haute (Vdd) sous la commande du signal de balayage (Gate), de manière à compenser une tension de seuil; le module électroluminescent (3) est configuré pour recevoir le signal d'émission de lumière (EM), recevoir la tension d'alimentation haute (Vdd) sous la commande du signal d'émission de lumière (EM), et émettre de la lumière, la luminance étant ajustée par modification de l'amplitude de la tension d'alimentation haute (Vdd). Le circuit d'attaque de pixel est capable de compenser efficacement une tension de seuil et d'ajuster la luminance au moyen de la tension d'alimentation haute (Vdd), a une structure simple et est facile à fabriquer.
PCT/CN2018/121848 2018-12-05 2018-12-18 Circuit d'attaque de pixel et dispositif d'affichage WO2020113674A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201811483205.4A CN109346012A (zh) 2018-12-05 2018-12-05 像素驱动电路及显示装置
CN201811483205.4 2018-12-05

Publications (1)

Publication Number Publication Date
WO2020113674A1 true WO2020113674A1 (fr) 2020-06-11

Family

ID=65297512

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2018/121848 WO2020113674A1 (fr) 2018-12-05 2018-12-18 Circuit d'attaque de pixel et dispositif d'affichage

Country Status (2)

Country Link
CN (1) CN109346012A (fr)
WO (1) WO2020113674A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109671394A (zh) * 2019-02-21 2019-04-23 深圳市华星光电半导体显示技术有限公司 Oled像素驱动电路和oled显示器
CN109935205B (zh) * 2019-04-02 2020-12-08 深圳市华星光电半导体显示技术有限公司 像素驱动电路以及像素驱动电路的补偿方法
CN109961738A (zh) * 2019-04-04 2019-07-02 深圳市华星光电半导体显示技术有限公司 像素驱动电路以及显示面板
CN112992040B (zh) * 2021-04-13 2022-11-22 成都天马微电子有限公司 调节电路和显示装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102708789A (zh) * 2011-12-01 2012-10-03 京东方科技集团股份有限公司 像素单元驱动电路和方法、像素单元以及显示装置
US20140118328A1 (en) * 2012-10-25 2014-05-01 Innolux Corporation Pixel driving circuit of an active-matrix organic light-emitting diode and a method of driving the same
CN205004016U (zh) * 2015-08-04 2016-01-27 信利（惠州）智能显示有限公司 一种有机发光二极管的驱动电路
CN106782322A (zh) * 2017-02-14 2017-05-31 深圳市华星光电技术有限公司 Amoled像素驱动电路及amoled像素驱动方法
CN107170412A (zh) * 2017-07-11 2017-09-15 深圳市华星光电半导体显示技术有限公司 一种amoled像素驱动电路及像素驱动方法
CN107591123A (zh) * 2017-09-29 2018-01-16 深圳市华星光电半导体显示技术有限公司 像素驱动电路及有机发光二极管显示器

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101130903B1 (ko) * 2004-08-31 2012-03-28 엘지디스플레이 주식회사 유기전계발광표시장치의 구동회로 및 구동방법
KR101135534B1 (ko) * 2010-02-10 2012-04-13 삼성모바일디스플레이주식회사 화소, 이를 이용한 표시 장치, 및 그들의 구동 방법
CN104157240A (zh) * 2014-07-22 2014-11-19 京东方科技集团股份有限公司 像素驱动电路、驱动方法、阵列基板及显示装置
CN105761664B (zh) * 2014-12-16 2018-06-29 昆山工研院新型平板显示技术中心有限公司 像素电路及其驱动方法和有源矩阵有机发光显示器

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102708789A (zh) * 2011-12-01 2012-10-03 京东方科技集团股份有限公司 像素单元驱动电路和方法、像素单元以及显示装置
US20140118328A1 (en) * 2012-10-25 2014-05-01 Innolux Corporation Pixel driving circuit of an active-matrix organic light-emitting diode and a method of driving the same
CN205004016U (zh) * 2015-08-04 2016-01-27 信利（惠州）智能显示有限公司 一种有机发光二极管的驱动电路
CN106782322A (zh) * 2017-02-14 2017-05-31 深圳市华星光电技术有限公司 Amoled像素驱动电路及amoled像素驱动方法
CN107170412A (zh) * 2017-07-11 2017-09-15 深圳市华星光电半导体显示技术有限公司 一种amoled像素驱动电路及像素驱动方法
CN107591123A (zh) * 2017-09-29 2018-01-16 深圳市华星光电半导体显示技术有限公司 像素驱动电路及有机发光二极管显示器

Also Published As

Publication number Publication date
CN109346012A (zh) 2019-02-15

Similar Documents

Publication Publication Date Title
US10565929B2 (en) Organic light emitting display
WO2020253646A1 (fr) Circuit d'attaque de pixel et procédé d'attaque associé, et appareil d'affichage
US9947269B2 (en) Organic light emitting display and circuit thereof
WO2020037767A1 (fr) Circuit d'attaque de pixel amoled, procédé d'attaque et panneau d'affichage
WO2019184266A1 (fr) Circuit d'attaque de pixel amoled, procédé d'attaque et terminal
WO2020211688A1 (fr) Circuit et procédé de pilotage de pixel, et panneau d'affichage
WO2016119304A1 (fr) Circuit d'attaque de pixel amoled et son procédé d'attaque
WO2018133144A1 (fr) Système d'attaque de pixels delo à matrice active (deloma) et procédé d'attaque de pixels deloma
WO2018045667A1 (fr) Circuit d'attaque et procédé d'attaque de pixel amoled
WO2016155053A1 (fr) Circuit de pilotage de pixel à diode électroluminescente organique à matrice active (amoled) et procédé de pilotage de pixel
WO2016145693A1 (fr) Circuit de commande de pixels amoled et procédé de commande de pixels
WO2016145692A1 (fr) Circuit de commande de pixels amoled et procédé de commande de pixels
WO2017177500A1 (fr) Circuit d'attaque de pixel à diode électroluminescente organique à matrice active (amoled) et procédé d'attaque de pixel
WO2016123855A1 (fr) Circuit d'attaque de pixels amoled et procédé d'attaque de pixels
WO2017156826A1 (fr) Circuit d'entraînement de pixel à diode électroluminescente organique à matrice active (amoled) et procédé d'entraînement de pixels
CN112489599B (zh) Amoled像素驱动电路、驱动方法及显示面板
WO2018072298A1 (fr) Circuit d'attaque de pixel de diode amoled et procédé d'attaque
WO2016123852A1 (fr) Circuit d'entraînement de pixel à diode électroluminescente organique à matrice active (amoled)
WO2018149008A1 (fr) Circuit d'attaque de pixel amoled et procédé d'attaque de pixel amoled
WO2016155087A1 (fr) Circuit d'attaque de pixel amoled et procédé d'attaque de pixel
WO2018068392A1 (fr) Circuit de pilotage de pixels amoled et procédé de pilotage
WO2017177501A1 (fr) Circuit d'attaque de pixel à diode électroluminescente organique à matrice active et procédé d'attaque de pixel
WO2016150232A1 (fr) Circuit de pixels, procédé de commande associé et dispositif d'affichage
CN108777131B (zh) Amoled像素驱动电路及驱动方法
WO2016123854A1 (fr) Circuit d'attaque de pixel à diode électroluminescente organique à matrice active (amoled) et procédé d'attaque de pixel

Legal Events

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

Ref document number: 18942179

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18942179

Country of ref document: EP

Kind code of ref document: A1