WO2020191695A1 - 栅极驱动单元、方法、栅极驱动电路、显示面板和装置 - Google Patents

栅极驱动单元、方法、栅极驱动电路、显示面板和装置 Download PDF

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Publication number
WO2020191695A1
WO2020191695A1 PCT/CN2019/080015 CN2019080015W WO2020191695A1 WO 2020191695 A1 WO2020191695 A1 WO 2020191695A1 CN 2019080015 W CN2019080015 W CN 2019080015W WO 2020191695 A1 WO2020191695 A1 WO 2020191695A1
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WIPO (PCT)
Prior art keywords
control
pull
node
gate drive
terminal
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PCT/CN2019/080015
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English (en)
French (fr)
Inventor
刘鹏
刘白灵
李付强
王志冲
冯京
栾兴龙
Original Assignee
京东方科技集团股份有限公司
鄂尔多斯市源盛光电有限责任公司
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Application filed by 京东方科技集团股份有限公司, 鄂尔多斯市源盛光电有限责任公司 filed Critical 京东方科技集团股份有限公司
Priority to EP19858715.6A priority Critical patent/EP3951756A4/en
Priority to PCT/CN2019/080015 priority patent/WO2020191695A1/zh
Priority to US16/650,306 priority patent/US11361703B2/en
Priority to CN201980000405.6A priority patent/CN112470208A/zh
Priority to JP2020561081A priority patent/JP7500907B2/ja
Publication of WO2020191695A1 publication Critical patent/WO2020191695A1/zh

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    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • G09G3/2092Details of a display terminals using a flat panel, the details relating to the control arrangement of the display terminal and to the interfaces thereto
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11CSTATIC STORES
    • G11C19/00Digital stores in which the information is moved stepwise, e.g. shift registers
    • G11C19/28Digital stores in which the information is moved stepwise, e.g. shift registers using semiconductor elements
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00Aspects of the constitution of display devices
    • G09G2300/04Structural and physical details of display devices
    • G09G2300/0421Structural details of the set of electrodes
    • G09G2300/0426Layout of electrodes and connections
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00Command of the display device
    • G09G2310/02Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0224Details of interlacing
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00Command of the display device
    • G09G2310/02Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264Details of driving circuits
    • G09G2310/0267Details of drivers for scan electrodes, other than drivers for liquid crystal, plasma or OLED displays
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00Command of the display device
    • G09G2310/02Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264Details of driving circuits
    • G09G2310/0286Details of a shift registers arranged for use in a driving circuit
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00Command of the display device
    • G09G2310/06Details of flat display driving waveforms
    • G09G2310/061Details of flat display driving waveforms for resetting or blanking
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00Command of the display device
    • G09G2310/08Details of timing specific for flat panels, other than clock recovery
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02Details of power systems and of start or stop of display operation
    • G09G2330/021Power management, e.g. power saving
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • G09G3/22Control 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
    • G09G3/30Control 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
    • G09G3/32Control 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]
    • G09G3/3208Control 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]
    • G09G3/3266Details of drivers for scan electrodes
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • G09G3/34Control 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 by control of light from an independent source
    • G09G3/36Control 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 by control of light from an independent source using liquid crystals
    • G09G3/3611Control of matrices with row and column drivers
    • G09G3/3674Details of drivers for scan electrodes

Definitions

  • the present disclosure relates to the field of display driving technology, and in particular to a gate driving unit, a method, a gate driving circuit, a display panel and a device.
  • GOA Gate On Array
  • the conventional gate driving unit can only drive one row of gate lines, and how many rows of gate lines there are, that is, how many gate driving units are needed for driving.
  • the conventional gate driving unit can only drive one row of gate lines, and how many rows of gate lines there are, that is, how many gate driving units are needed for driving.
  • display products with bilateral driving can solve the problem of inconsistent driving capabilities, but they require gate driving units with the same number of gate lines on both sides to drive, resulting in excessive display panel frame size.
  • the power consumption also increases with the increase in resolution, and the standby time is greatly reduced.
  • the power Reducing the refresh frequency of the display device is an effective way to significantly reduce the power consumption, but reducing the refresh frequency will bring about the occurrence of high flicker.
  • an embodiment of the present disclosure provides a gate driving unit, including a starting end, a first gate driving signal output terminal, and a second gate driving signal output terminal;
  • the pull-up control node control circuit is configured to control and maintain the potential of the pull-up control node as an effective voltage under the control of the start signal input from the start end, and control the pull-up node under the control of the potential of the pull-down node. Pull the potential of the control node as an invalid voltage;
  • a pull-up node control circuit configured to control the potential of the first pull-up node and the potential of the second pull-up node according to the potential of the pull-up control node;
  • the first gate drive signal output circuit is configured to control the communication between the first gate drive signal output terminal and the first clock signal terminal under the control of the electric potential of the first pull-up node. Controlling the resetting of the first gate driving signal output from the first gate driving signal output terminal under the control of the potential of the node;
  • the second gate drive signal output circuit is configured to control the communication between the second gate drive signal output terminal and the second clock signal terminal under the control of the potential of the second pull-up node. Under the control of the potential of the node, controlling to reset the second gate driving signal output from the second gate driving signal output terminal; and,
  • the pull-down node control circuit is configured to control and maintain the potential of the pull-down node under the control of the third clock signal input from the third clock signal terminal and the fourth clock signal input Under the control of the potential of the control node, the potential of the pull-down node is reset.
  • the start end includes the start end of odd-numbered rows and the start end of even-numbered rows;
  • the pull-up control node control circuit is configured to control and maintain the potential of the pull-up control node to be an effective voltage when an effective voltage is input to the start end of the odd-numbered row, and when an effective voltage is input to the start end of the even-numbered row, Controlling and maintaining the potential of the pull-up control node as an effective voltage, and when the potential of the pull-down node is an effective voltage, controlling the potential of the pull-up control node as an invalid voltage.
  • the pull-up control node control circuit includes:
  • control electrode is connected to the start end of the odd-numbered row, the first electrode is connected to the first voltage end, and the second electrode is connected to the pull-up control node;
  • control electrode is connected to the start end of the even-numbered row, the first electrode is connected to the first voltage end, and the second electrode is connected to the pull-up control node;
  • a pull-up control node pull-down transistor a control electrode is connected to the pull-down node, a first electrode is connected to the pull-up control node, and a second electrode is connected to the second voltage terminal;
  • the pull-up control node maintains the capacitance, the first end is connected to the pull-up control node, and the second end is connected to the third voltage end.
  • the starting end includes a forward odd-numbered row starting end, a reverse odd-numbered row starting end, a forward even-numbered row starting end, and a reverse odd-numbered row starting end;
  • the gate driving unit further includes a forward scanning control end And reverse scan control terminal;
  • the pull-up control node control circuit is configured to control when an effective voltage is input from the start end of the positive odd-numbered line under the control of the forward scanning control signal input from the forward scanning control terminal during forward scanning
  • the potential of the pull-up control node is an effective voltage, and when an effective voltage is input to the start end of the even-numbered row, control and maintain the potential of the pull-up control node to be the effective voltage
  • the pull-up control node control circuit is further configured to, during reverse scanning, under the control of the reverse scanning control signal input from the reverse scanning control terminal, when an effective voltage is input at the start end of the reverse odd-numbered row, Controlling the potential of the pull-up control node to be an effective voltage, and controlling and maintaining the potential of the pull-up control node to be the effective voltage when an effective voltage is input at the beginning of the reverse even-numbered row;
  • the pull-up control node control circuit is further configured to control the potential of the pull-up control node to be an invalid voltage when the potential of the pull-down node is an effective voltage.
  • the pull-up control node control circuit includes:
  • a first forward scanning control transistor the control electrode is connected to the forward scanning control terminal, and the first electrode is connected to the start end of the forward odd-numbered row;
  • a second forward scanning control transistor the control electrode is connected to the forward scanning control terminal, and the first electrode is connected to the start end of the forward even-numbered row;
  • the first reverse scan control transistor the control electrode is connected to the reverse scan control terminal, the first electrode is connected to the control electrode of the first pull-up control node control transistor, and the second electrode is connected to the start end of the reverse odd row ;
  • the second reverse scan control transistor the control electrode is connected to the reverse scan control terminal, the first electrode is connected to the control electrode of the second pull-up control node control transistor, and the second electrode is connected to the start end of the reverse even-numbered row ;
  • the first pull-up control node controls the transistor, the control electrode is connected to the second electrode of the first forward scan control transistor, the first electrode is connected to the first voltage terminal, and the second electrode is connected to the pull-up control node ;
  • the second pull-up control node controls the transistor, the control electrode is connected to the second electrode of the second forward scan control transistor, the first electrode is connected to the first voltage terminal, and the second electrode is connected to the pull-up control node ;
  • a pull-up control node pulls down the transistor, a control electrode is connected to the pull-down node, a first electrode is connected to the pull-up control node, and a second electrode is connected to the second voltage terminal;
  • the pull-up control node maintains the capacitance, the first end is connected to the pull-up control node, and the second end is connected to the third voltage end.
  • the gate driving unit described in at least one embodiment of the present disclosure further includes a reset circuit
  • the reset circuit is configured to control the potential of the pull-down node to an effective voltage under the control of a blank area reset signal input from a blank area reset terminal.
  • the pull-up node control circuit includes:
  • the first pull-up node controls the transistor, the control electrode is connected to the first voltage terminal, the first electrode is connected to the first pull-up node, and the second electrode is connected to the pull-up control node; and,
  • the second pull-up node controls the transistor, the control electrode is connected to the first voltage terminal, the first electrode is connected to the second pull-up node, and the second electrode is connected to the pull-up control node.
  • the pull-down node control circuit includes:
  • the first pull-down node controls the transistor, the control electrode and the first electrode are both connected to the third clock signal terminal, and the second electrode is connected to the pull-down node;
  • the second pull-down node controls the transistor, the control electrode and the second electrode are both connected to the fourth clock signal terminal, and the first electrode is connected to the pull-down node;
  • the third pull-down node controls the transistor, the control electrode is connected to the pull-up control node, the first electrode is connected to the pull-down node, and the second electrode is connected to the second voltage terminal; and,
  • the pull-down node maintains the capacitor, the first terminal is connected to the pull-down node, and the second terminal is connected to the fourth voltage terminal.
  • the first gate drive signal output circuit includes a first output transistor and a first output pull-down transistor
  • the control electrode of the first output transistor is connected to the first pull-up node, the first electrode of the first output transistor is connected to the first clock signal terminal, and the second electrode of the first output transistor is connected to The first gate drive signal output terminal is connected;
  • the control electrode of the first output pull-down transistor is connected to the pull-down node, the first electrode of the first output pull-down transistor is connected to the first gate drive signal output terminal, and the first electrode of the first output pull-down transistor The two poles are connected to the second voltage terminal.
  • the second gate drive signal output circuit includes a second output transistor and a second output pull-down transistor
  • the control electrode of the second output transistor is connected to the second pull-up node, the first electrode of the second output transistor is connected to the second clock signal terminal, and the second electrode of the second output transistor is connected to The second gate drive signal output terminal is connected;
  • the control electrode of the second output pull-down transistor is connected to the pull-down node, the first electrode of the second output pull-down transistor is connected to the second gate drive signal output terminal, and the first electrode of the second output pull-down transistor The two poles are connected to the second voltage terminal.
  • the gate driving unit described in at least one embodiment of the present disclosure further includes a touch output control circuit
  • the touch output control circuit is configured to control both the first gate drive signal output terminal and the second gate drive signal output terminal to output under the control of the touch output control signal input from the touch output control terminal Invalid voltage.
  • the gate driving unit described in at least one embodiment of the present disclosure further includes a screen rest control circuit
  • the rest screen control circuit is used for controlling both the first gate drive signal output terminal and the second gate drive signal output terminal to output effective voltages under the control of the rest screen control signal input from the rest screen control terminal.
  • the embodiments of the present disclosure also provide a gate driving method for driving the above-mentioned gate driving unit.
  • the display time of one frame of picture includes a first display period and a second display period.
  • a display period includes a first input period and a first output period that are sequentially set;
  • the second display period includes a second input period and a second output period that are sequentially set; and
  • the gate driving method includes:
  • the pull-up control node control circuit controls the potential of the pull-up control node to be an effective voltage under the control of the start signal, and the pull-up node control circuit controls the node according to the pull-up control node. Control the potential of the first pull-up node and the potential of the second pull-up node to be effective voltages;
  • the pull-up control node control circuit maintains the potential of the pull-up control node at an effective voltage
  • the first clock signal terminal inputs an effective voltage
  • the first gate drive signal output circuit pulls up on the first Controlling the communication between the first gate driving signal output terminal and the first clock signal terminal under the control of the potential of the node, so as to control the first gate driving signal output terminal to output an effective voltage
  • the pull-up control node control circuit maintains the potential of the pull-up control node at an effective voltage
  • the second clock signal terminal inputs an effective voltage
  • the second gate drive signal output circuit performs the second pull-up Under the control of the potential of the node, the communication between the second gate drive signal output terminal and the second clock signal terminal is controlled to control the second gate drive signal output terminal to output an effective voltage
  • the first display period further includes a first output reset period and a first pull-down node control period set after the first output period
  • the second display period further includes
  • the gate driving method further includes:
  • the pull-up control node control circuit maintains the potential of the pull-up control node as a valid voltage, the first clock signal terminal inputs an invalid voltage, and the first gate drive signal output circuit is on the first Controlling the communication between the first gate drive signal output terminal and the first clock signal terminal under the control of the potential of the pull node, so as to control the first gate drive signal output terminal to output an invalid voltage;
  • the third clock signal terminal inputs an effective voltage
  • the pull-down node control circuit controls the pull-down node voltage to be the effective voltage under the control of the third clock signal
  • the first gate drive signal output circuit is Controlling the resetting of the first gate driving signal output from the first gate driving signal output terminal under the control of the potential of the pull-down node
  • the pull-up control node control circuit maintains the potential of the pull-up control node as a valid voltage, the second clock signal terminal inputs an invalid voltage, and the second gate drive signal output circuit is on the second upper Controlling the communication between the second gate drive signal output terminal and the second clock signal terminal under the control of the potential of the pull node, so as to control the second gate drive signal output terminal to output an invalid voltage;
  • the fourth clock signal terminal is input with an effective voltage
  • the pull-down node control circuit controls the pull-down node voltage to be the effective voltage under the control of the fourth clock signal
  • the second gate drive signal output circuit is at all Under the control of the potential of the pull-down node, the second gate driving signal output from the second gate driving signal output terminal is controlled to reset.
  • the first display period further includes a first output cut-off holding period set after the first pull-down node control period
  • the second display period further includes a first output cut-off holding period set at the second pull-down node The second output cut-off holding period after the control period
  • the gate driving method further includes:
  • the pull-down node control circuit maintains the voltage of the pull-down node as an effective voltage, and the first gate drive signal output circuit controls the control of the first gate under the control of the potential of the pull-down node.
  • the first gate drive signal output from the pole drive signal output terminal is reset;
  • the pull-down node control circuit maintains the voltage of the pull-down node as an effective voltage, and the second gate drive signal output circuit controls the second gate under the control of the potential of the pull-down node.
  • the second gate drive signal output from the pole drive signal output terminal is reset.
  • the gate driving method described in at least one embodiment of the present disclosure further includes:
  • the first gate drive signal output circuit is under the control of the potential of the first pull-up node, Control the communication between the first gate drive signal output terminal and the first clock signal terminal to control the first gate drive signal output terminal to output an invalid voltage, and the second gate drive signal output circuit pulls up on the second Controlling the communication between the second gate drive signal output terminal and the second clock signal terminal under the control of the potential of the node to control the second gate drive signal output terminal to output an invalid voltage;
  • the second clock signal terminal is input with an effective voltage
  • the second gate drive signal output circuit controls the second gate drive signal output terminal and the second gate drive signal output circuit under the control of the potential of the second pull-up node. Communication between the second clock signal terminals to control the second gate drive signal output terminal to output an invalid voltage
  • the first clock signal terminal is input with an effective voltage
  • the first gate drive signal output circuit controls the first gate drive signal output terminal and the first gate drive signal output circuit under the control of the potential of the first pull-up node
  • the first clock signal terminals are connected to each other to control the first gate drive signal output terminal to output an invalid voltage
  • the gate driving unit further includes a reset circuit
  • the gate driving method according to at least one embodiment of the present disclosure further includes:
  • the reset circuit controls the potential of the pull-down node to be an effective voltage under the control of the blank area reset signal input from the blank area reset terminal.
  • an embodiment of the present disclosure also provides a gate driving circuit, which includes multiple stages of the above-mentioned gate driving units.
  • the start end includes the start end of odd-numbered rows and the start end of even-numbered rows;
  • the start end of the odd-numbered row of each stage of the gate drive unit is connected to the first gate drive signal output terminal of the adjacent previous-stage gate drive unit.
  • the start end of the even-numbered row is connected to the second gate drive signal output end of the adjacent upper-level gate drive unit;
  • the start end of the odd-numbered row of the first-stage gate driving unit is connected to the first start signal input end, and the start end of the even-numbered row of the first-stage gate driving unit is connected to the second start signal input end.
  • the starting end includes a forward odd-numbered row starting end, a reverse odd-numbered row starting end, a forward even-numbered row starting end, and a reverse odd-numbered row starting end;
  • the gate driving unit further includes a forward scanning control end And reverse scan control terminal;
  • the start end of the positive odd-numbered row of each stage of the gate drive unit is connected to the first gate drive signal output terminal of the adjacent previous-stage gate drive unit, and each stage of gate drive The start end of the positive even-numbered row of the unit is connected to the second gate drive signal output end of the adjacent upper-level gate drive unit;
  • the start end of the positive odd-numbered row of the first-stage gate drive unit is connected to the first forward start signal input end, and the start end of the forward even-numbered row of the first-stage gate drive unit and the second positive start signal input end connection;
  • the start end of the reverse odd-numbered row of each stage of the gate drive unit is connected to the first gate drive signal output terminal of the adjacent next-stage gate drive unit, and each stage of gate drive The start end of the reverse even-numbered row of the unit is connected to the second gate drive signal output end of the adjacent next-stage gate drive unit;
  • the start end of the reverse odd-numbered row of the last-stage gate drive unit is connected to the first reverse start signal input end, and the start end of the reverse even-numbered row of the last-stage gate drive unit and the second reverse start signal input end connection.
  • the first clock signal terminal of the 2n-1 stage gate drive unit is connected to the first clock signal input terminal, and the second clock signal terminal and the second clock signal input terminal of the 2n-1 stage gate drive unit Connected, the first clock signal terminal of the 2n-1 stage gate drive unit is connected to the fifth clock signal input terminal, and the second clock signal terminal of the 2n-1 stage gate drive unit is connected to the sixth clock signal input terminal;
  • the first clock signal terminal of the 2n-th stage gate drive unit is connected to the third clock signal input terminal
  • the second clock signal terminal of the 2n-th stage gate drive unit is connected to the fourth clock signal input terminal
  • the 2n-th stage gate drive unit is connected to the fourth clock signal input terminal.
  • the first clock signal terminal of the unit is connected to the seventh clock signal input terminal
  • the second clock signal terminal of the 2n-th stage gate driving unit is connected to the eighth clock signal input terminal;
  • n is a positive integer.
  • the embodiments of the present disclosure also provide a gate driving method, which is applied to the above-mentioned gate driving circuit, and the display time of one frame of picture includes a first display period and a second display period;
  • Driving methods include:
  • each level of the gate driving unit included in the gate driving circuit gradually outputs an effective voltage through its first gate driving signal output terminal;
  • each level of the gate driving unit included in the gate driving circuit gradually outputs an effective voltage through its second gate driving signal output terminal.
  • the first display period includes M display time periods set in sequence
  • the second display period includes M display time periods set in sequence
  • M is the total number of stages of gate drive units included in the gate drive circuit ;
  • the gate driving method includes: during forward scanning,
  • the m-th stage gate driving unit included in the gate driving circuit outputs an effective voltage through its first gate driving signal output terminal;
  • the m-th stage gate driving unit included in the gate driving circuit outputs an effective voltage through its second gate driving signal output terminal;
  • M is an integer greater than 1, and m is a positive integer less than or equal to M.
  • the first display period includes M display time periods set in sequence
  • the second display period includes M display time periods set in sequence
  • M is the total number of stages of gate drive units included in the gate drive circuit ;
  • the gate driving method includes: in reverse scanning,
  • the M-m+1-th stage gate drive unit included in the gate drive circuit outputs an effective voltage through its first gate drive signal output terminal;
  • the gate driving unit of the M-m+1th stage included in the gate driving circuit outputs an effective voltage through its second gate driving signal output terminal;
  • M is an integer greater than 1, and m is a positive integer less than or equal to M.
  • an embodiment of the present disclosure also provides a display panel, including a display substrate, and further including 2M rows of gate lines and the above-mentioned gate driving circuit provided on the display substrate; M is the gate The total number of stages of gate drive units included in the pole drive circuit;
  • the first gate drive signal output terminal of the m-th stage gate drive unit of the gate drive circuit is connected to the 2m-1th row gate line;
  • the second gate drive signal output terminal of the m-th stage gate drive unit of the gate drive circuit is connected to the 2m-th row gate line;
  • M is an integer greater than 1, and m is a positive integer less than or equal to M.
  • an embodiment of the present disclosure further provides a display panel, including a display substrate, and further including a 2M row of gate lines and two of the above-mentioned gate driving circuits provided on the display substrate; M is all The total number of stages of gate drive units included in the gate drive circuit;
  • the first gate drive signal output terminal of the m-th stage gate drive unit of the first gate drive circuit is connected to the left end of the gate line of the 2m-1th row;
  • the second gate drive signal output terminal of the m-th stage gate drive unit of the first gate drive circuit is connected to the left end of the 2m-th row of gate lines;
  • the first gate drive signal output terminal of the m-th stage gate drive unit of the second gate drive circuit is connected to the right end of the gate line of the 2m-1th row;
  • the second gate driving signal output terminal of the m-th stage gate driving unit of the second gate driving circuit is connected to the right end of the 2m-th row of gate lines;
  • M is an integer greater than 1, and m is a positive integer less than or equal to M.
  • an embodiment of the present disclosure also provides a display device, including the above-mentioned display panel.
  • FIG. 1 is a structural diagram of a gate driving unit according to at least one embodiment of the present disclosure
  • FIG. 2 is a structural diagram of a gate driving unit according to at least one embodiment of the present disclosure
  • FIG. 3 is a structural diagram of a gate driving unit according to at least one embodiment of the present disclosure.
  • FIG. 4 is a structural diagram of a gate driving unit according to at least one embodiment of the present disclosure.
  • FIG. 5 is a structural diagram of a gate driving unit according to at least one embodiment of the present disclosure.
  • FIG. 6 is a structural diagram of a gate driving unit according to at least one embodiment of the present disclosure.
  • FIG. 7 is a structural diagram of a gate driving unit according to at least one embodiment of the present disclosure.
  • FIG. 8 is a structural diagram of a gate driving unit according to at least one embodiment of the present disclosure.
  • FIG. 9 is a circuit diagram of a gate driving unit according to at least one embodiment of the present disclosure.
  • FIG. 10 is a working timing diagram of the gate driving unit according to at least one embodiment of the present disclosure as shown in FIG. 9;
  • FIG. 11 is a structural diagram of a gate driving circuit according to at least one embodiment of the present disclosure.
  • FIG. 12 is a working timing diagram of the gate driving circuit according to at least one embodiment of the present disclosure during forward scanning
  • FIG. 13 is a working timing diagram of the gate driving circuit in at least one embodiment of the present disclosure during reverse scanning
  • FIG. 14 is a schematic diagram of the connection relationship between two gate driving circuits and multiple rows of gate lines included in the display panel according to at least one embodiment of the present disclosure.
  • the transistors used in all the embodiments of the present disclosure may be triodes, thin film transistors or field effect transistors or other devices with the same characteristics.
  • one of the poles is called the first pole and the other pole is called the second pole.
  • the control electrode when the transistor is a triode, can be a base, the first electrode can be a collector, and the second electrode can be an emitter; or, the control electrode can be a base.
  • the first electrode may be an emitter electrode, and the second electrode may be a collector electrode.
  • the control electrode when the transistor is a thin film transistor or a field effect transistor, the control electrode may be a gate, the first electrode may be a drain, and the second electrode may be a source; or The control electrode may be a gate, the first electrode may be a source, and the second electrode may be a drain.
  • the gate driving unit includes a start terminal STV, a first gate driving signal output terminal OP1, a second gate driving signal output terminal OP2, a pull-up control node control Circuit 11, pull-up node control circuit 12, first gate drive signal output circuit 13, second gate drive signal output circuit 14, and pull-down node control circuit 15;
  • the pull-up control node control circuit 11 is respectively connected to the start terminal STV, the pull-up control node PUCN and the pull-down node PD, and is configured to control and maintain the pull-up under the control of the start signal input by the start terminal STV
  • the potential of the control node PUCN is an effective voltage, and under the control of the potential of the pull-down node PD, the potential of the pull-up control node PUCN is controlled to be an invalid voltage;
  • the pull-up node control circuit 12 is respectively connected to the pull-up control node PUCN, the first pull-up node PU1 and the second pull-up node PU2, and is configured to control the first pull-up node according to the potential of the pull-up control node PUCN The potential of PU1 and the potential of the second pull-up node PU2;
  • the first gate drive signal output circuit 13 is respectively connected to the first pull-up node PU1, the first gate drive signal output terminal OP1, the first clock signal terminal and the pull-down node PD, and is configured to Under the control of the potential of the first pull-up node PU1, the first gate drive signal output terminal OP1 is controlled to communicate with the first clock signal terminal, and under the control of the potential of the pull-down node PD, the control of the The first gate drive signal output by the first gate drive signal output terminal OP1 is reset; the first clock signal terminal CK1 is used to input the first clock signal;
  • the second gate drive signal output circuit 14 is respectively connected to the second pull-up node PU2, the second gate drive signal output terminal OP2, the second clock signal terminal and the pull-down node PD, and is configured to Under the control of the potential of the second pull-up node PU2, the communication between the second gate drive signal output terminal OP2 and the second clock signal terminal is controlled, and under the control of the potential of the pull-down node PD, the control pair Resetting the second gate driving signal output by the second gate driving signal output terminal OP2; and,
  • the pull-down node control circuit 15 is connected to the third clock signal terminal, the fourth clock signal terminal, the pull-down node PD, and the pull-up control node PUCN, respectively, and is configured as the third clock signal and the fourth clock signal input at the third clock signal terminal CK3. Controlling and maintaining the potential of the pull-down node PD under the control of the fourth clock signal input from the clock signal terminal CK4, and resetting the potential of the pull-down node PD under the control of the potential of the pull-up control node PUCN;
  • the second clock signal terminal CK2 is used to input a second clock signal.
  • the display time of one frame is divided into a first display period and a second display period.
  • the first gate drive signal output circuit 13 included in the gate drive unit controls the output of an effective voltage through the first gate drive signal output terminal OP1.
  • the gate The second gate driving signal output circuit 14 included in the driving unit outputs an effective voltage through the second gate driving signal output terminal OP2.
  • the display time of one frame of screen may include a first display period and a second display period that are set in sequence, that is, the first display period is before the second display period, but it is not limited to this;
  • the display time of one frame of picture may include a second display period and a first display period that are sequentially set, that is, the second display period is before the first display period, but it is not limited to this.
  • the effective voltage is a voltage capable of controlling the opening of a transistor whose gate is connected to it.
  • the effective voltage may be a high voltage, but is not limited to this;
  • the effective voltage may be a low voltage, but is not limited to this.
  • the invalid voltage is a voltage that can control a transistor whose gate is connected to it to turn off.
  • the invalid voltage may be a low voltage, but is not limited to this;
  • the invalid voltage can be a high voltage, but is not limited to this.
  • the gate driving unit divides the display time of one frame of screen into two display periods, and controls the output of a gate drive signal during the output period included in one display period.
  • the gate driving unit described in an embodiment realizes alternate output of odd and even rows, which can reduce the refresh frequency to achieve low power consumption and reduce the risk of increasing Flicker (flicker).
  • the gate driving unit described in at least one embodiment of the present disclosure can provide two-level gate driving signal output, which can increase the wiring space of the display panel frame.
  • the first display period includes a first input period, a first output period, a first output reset period, and a first pull-down node that are sequentially set The control time period and the first output cut-off and hold time period;
  • the second display period includes the second input time period, the second output time period, the second output reset time period, the second pull-down node control time period, and the second output that are sequentially set Off-hold time period;
  • the gate driving method further includes:
  • the pull-up control node control circuit 11 controls the potential of the pull-up control node PUCN to be an effective voltage under the control of the start signal
  • the pull-up node control circuit 12 controls the potential of the pull-up control node PUCN to be an effective voltage according to the Pull the potential of the control node PUCN, control the potential of the first pull-up node PU1 and the potential of the second pull-up node PU2 to be effective voltages;
  • the pull-up control node control circuit 11 maintains the potential of the pull-up control node PUCN as an effective voltage
  • the first clock signal terminal inputs an effective voltage
  • the first gate drive signal output circuit 13 is in the first Under the control of the potential of a pull-up node PU1, controlling the communication between the first gate drive signal output terminal OP1 and the first clock signal terminal to control the first gate drive signal output terminal OP1 to output an effective voltage;
  • the pull-up control node control circuit 11 maintains the potential of the pull-up control node PUCN as a valid voltage, the first clock signal terminal inputs an invalid voltage, and the first gate drive signal output circuit 13 Under the control of the potential of the first pull-up node PU1, controlling the communication between the first gate drive signal output terminal OP1 and the first clock signal terminal to control the first gate drive signal output terminal OP1 to output an invalid voltage;
  • the third clock signal terminal inputs an effective voltage
  • the pull-down node control circuit 15 controls the voltage of the pull-down node PD to be the effective voltage under the control of the third clock signal input by CK3, and the first gate
  • the driving signal output circuit 13 controls to reset the first gate driving signal output from the first gate driving signal output terminal under the control of the potential of the pull-down node PD;
  • the pull-down node control circuit 15 maintains the voltage of the pull-down node PD as an effective voltage, and the first gate drive signal output circuit 13 controls the voltage of the pull-down node PD under the control of the potential of the pull-down node PD.
  • the first gate driving signal output by the first gate driving signal output terminal OP1 is reset;
  • the pull-up control node control circuit 11 maintains the potential of the pull-up control node PUCN as an effective voltage, the second clock signal terminal inputs an effective voltage, and the second gate drive signal output circuit 14 is in the first 2. Under the control of the potential of the pull-up node PU2, controlling the communication between the second gate drive signal output terminal OP2 and the second clock signal terminal to control the second gate drive signal output terminal OP2 to output an effective voltage;
  • the pull-up control node control circuit 11 maintains the potential of the pull-up control node PUCN as a valid voltage, the second clock signal terminal inputs an invalid voltage, and the second gate drive signal output circuit 14 Under the control of the potential of the second pull-up node PU2, controlling the communication between the second gate driving signal output terminal OP2 and the second clock signal terminal to control the second gate driving signal output terminal OP2 to output an invalid voltage;
  • the fourth clock signal terminal inputs an effective voltage
  • the pull-down node control circuit 15 controls the voltage of the pull-down node PD to be the effective voltage under the control of the fourth clock signal input by CK4, and the second gate drive
  • the signal output circuit 14 controls to reset the second gate drive signal output from the second gate drive signal output terminal OP2 under the control of the potential of the pull-down node PD;
  • the pull-down node control circuit 15 maintains the voltage of the pull-down node PD as an effective voltage, and the second gate drive signal output circuit 14 controls the voltage of the pull-down node PD under the control of the potential of the pull-down node PD.
  • the second gate driving signal output from the second gate driving signal output terminal OP2 is reset.
  • the start end may include the start end of odd-numbered rows and the start end of even-numbered rows;
  • the pull-up control node control circuit is configured to control and maintain the potential of the pull-up control node to be an effective voltage when an effective voltage is input to the start end of the odd-numbered row, and when an effective voltage is input to the start end of the even-numbered row, Controlling and maintaining the potential of the pull-up control node as an effective voltage, and when the potential of the pull-down node is an effective voltage, controlling the potential of the pull-up control node as an invalid voltage.
  • the start end includes an odd-numbered row start end STV_ODD and an even-numbered row start end STV_EVEN;
  • the pull-up control node control circuit 11 is respectively connected to the odd-numbered line start end STV_ODD, the even-numbered line start end STV_EVEN, and the pull-up control node PUCN for controlling when the odd-numbered line start end STV_ODD inputs a valid voltage And maintain the potential of the pull-up control node PUCN as an effective voltage, and when the even-numbered line start terminal STV_EVEN inputs an effective voltage, control and maintain the potential of the pull-up control node PUCN as the effective voltage.
  • the potential of the PD is a valid voltage
  • the potential of the pull-up control node PUCN is controlled to be an invalid voltage.
  • the pull-up control node control circuit may include:
  • control electrode is connected to the start end of the odd-numbered row, the first electrode is connected to the first voltage end, and the second electrode is connected to the pull-up control node;
  • control electrode is connected to the start end of the even-numbered row, the first electrode is connected to the first voltage end, and the second electrode is connected to the pull-up control node;
  • a pull-up control node pull-down transistor a control electrode is connected to the pull-down node, a first electrode is connected to the pull-up control node, and a second electrode is connected to the second voltage terminal;
  • the pull-up control node maintains the capacitance, the first end is connected to the pull-up control node, and the second end is connected to the third voltage end.
  • the first voltage terminal may be a high voltage terminal
  • the second voltage terminal may be a low voltage terminal
  • the third voltage terminal may be a low voltage terminal, but it is not limited to this.
  • the pull-up control node control circuit 11 includes:
  • the gate is connected to the start terminal STV_ODD of the odd-numbered row, the drain is connected to the high voltage terminal, and the source is connected to the pull-up control node PUCN; the high voltage terminal is used to input a high voltage VGH;
  • the second transistor T02 has a gate connected to the even-numbered row start terminal STV_EVEN, a drain connected to the high voltage terminal, and a source connected to the pull-up control node PUCN;
  • a pull-up control node pull-down transistor T10 the gate is connected to the pull-down node PD, the drain is connected to the pull-up control node PUCN, and the source is connected to the low voltage terminal;
  • the pull-up control node maintains the capacitor C1, the first end is connected to the pull-up control node PUCN, and the second end is connected to the low voltage end;
  • the low voltage terminal is used to input a low voltage VGL.
  • each transistor is an n-type thin film transistor, but it is not limited thereto.
  • the starting end includes a forward odd-numbered row starting end STVF_ODD and a reverse odd-numbered row starting end STVB_ODD 1.
  • the gate driving unit may also include a forward scan control terminal CN and a reverse scan control terminal CNB;
  • the pull-up control node control circuit 11 is respectively connected to the forward scanning control terminal CN, the forward odd-numbered line start terminal SVTF_ODD, the pull-up control node PUCN and the forward even-numbered line start terminal STVF_EVEN, and is configured to Under the control of the forward scanning control signal input from the forward scanning control terminal CN, when the positive odd-numbered line start terminal STVF_ODD inputs an effective voltage, the potential of the pull-up control node PUCN is controlled to be an effective voltage, and when the When an effective voltage is input to the start terminal STVF_EVEN of the positive even-numbered row, controlling and maintaining the potential of the pull-up control node PUCN as the effective voltage;
  • the pull-up control node control circuit 11 is also connected to the reverse scanning control terminal CNB, the reverse odd-numbered line start end STVB_ODD, and the reverse even-numbered line start end STVB_EVEN, respectively, and is configured to perform reverse scanning during reverse scanning. Under the control of the reverse scan control signal input from the control terminal CNB, when the starting end STVB_ODD of the reverse odd-numbered row inputs an effective voltage, the potential of the pull-up control node PUCN is controlled to be the effective voltage, and when the reverse even-numbered When an effective voltage is input to the row start terminal STVB_EVEN, control and maintain the potential of the pull-up control node PUCN as the effective voltage;
  • the pull-up control node control circuit 11 is also connected to the pull-down node PD, and is further configured to control the potential of the pull-up control node PUCN to be an invalid voltage when the potential of the pull-down node PD is an effective voltage.
  • the pull-up control node control circuit may include:
  • a first forward scanning control transistor the control electrode is connected to the forward scanning control terminal, and the first electrode is connected to the start end of the forward odd-numbered row;
  • a second forward scanning control transistor the control electrode is connected to the forward scanning control terminal, and the first electrode is connected to the start end of the forward even-numbered row;
  • the first reverse scan control transistor the control electrode is connected to the reverse scan control terminal, the first electrode is connected to the control electrode of the first pull-up control node control transistor, and the second electrode is connected to the start end of the reverse odd row ;
  • the second reverse scan control transistor the control electrode is connected to the reverse scan control terminal, the first electrode is connected to the control electrode of the second pull-up control node control transistor, and the second electrode is connected to the start end of the reverse even-numbered row ;
  • the first pull-up control node controls the transistor, the control electrode is connected to the second electrode of the first forward scan control transistor, the first electrode is connected to the first voltage terminal, and the second electrode is connected to the pull-up control node ;
  • the second pull-up control node controls the transistor, the control electrode is connected to the second electrode of the second forward scan control transistor, the first electrode is connected to the first voltage terminal, and the second electrode is connected to the pull-up control node ;
  • a pull-up control node pull-down transistor a control electrode is connected to the pull-down node, a first electrode is connected to the pull-up control node, and a second electrode is connected to the second voltage terminal;
  • the pull-up control node maintains the capacitance, the first end is connected to the pull-up control node, and the second end is connected to the third voltage end.
  • the pull-up control node control circuit 11 includes:
  • the first forward scanning control transistor T1 has a gate connected to the forward scanning control terminal CN, and a drain connected to the start end SVTF_ODD of the forward odd-numbered row;
  • the second forward scanning control transistor T3 has a gate connected to the forward scanning control terminal CN, and a drain connected to the start end STVF_EVEN of the forward even-numbered row;
  • the first reverse scan control transistor T2 the gate is connected to the reverse scan control terminal CNB, the drain is connected to the gate of the first pull-up control node control transistor T5, and the source is connected to the start end of the reverse odd row STVB_ODD connection;
  • the second reverse scan control transistor T4 the gate is connected to the reverse scan control terminal CNB, the drain is connected to the gate of the second pull-up control node control transistor T6, and the source is connected to the start end of the reverse even row STVB_EVEN connection;
  • the first pull-up control node controls the transistor T5, the gate is connected to the source of the first forward scan control transistor T3, the drain is connected to the high voltage terminal, and the source is connected to the pull-up control node PUCN;
  • the high voltage terminal is used to input high voltage VGH;
  • the second pull-up control node controls the transistor T6, the gate is connected to the source of the second forward scan control transistor T3, the drain is connected to the high voltage terminal, and the source is connected to the pull-up control node PUCN;
  • a pull-up control node pull-down transistor T10 the gate is connected to the pull-down node PD, the drain is connected to the pull-up control node PUCN, and the second pole is connected to the low voltage terminal;
  • the pull-up control node maintains the capacitor C2, the first end is connected to the pull-up control node PUCN, and the second end is connected to the low voltage end; the low voltage end is used to input the low voltage VGL.
  • the gate driving unit described in at least one embodiment of the present disclosure also Can include a reset circuit 16;
  • the reset circuit 16 is respectively connected to the blank area reset terminal Rst and the pull-down node PD, and is configured to control the potential of the pull-down node PD to an effective voltage under the control of the blank area reset signal input from the blank area reset terminal Rst.
  • Rst inputs an effective voltage
  • the reset circuit 16 controls the potential of PD to be an effective voltage under the control of the blank area reset signal input by Rst to control the potential of PUCN, the first gate drive signal output by OP1 and The second gate drive signal output by OP2 performs noise reduction.
  • the pull-up node control circuit may include:
  • the first pull-up node controls the transistor, the control electrode is connected to the first voltage terminal, the first electrode is connected to the first pull-up node, and the second electrode is connected to the pull-up control node; and,
  • the second pull-up node controls the transistor, the control electrode is connected to the first voltage terminal, the first electrode is connected to the second pull-up node, and the second electrode is connected to the pull-up control node.
  • the pull-down node control circuit may include:
  • the first pull-down node controls the transistor, the control electrode and the first electrode are both connected to the third clock signal terminal, and the second electrode is connected to the pull-down node;
  • the second pull-down node controls the transistor, the control electrode and the second electrode are both connected to the fourth clock signal terminal, and the first electrode is connected to the pull-down node;
  • the third pull-down node controls the transistor, the control electrode is connected to the pull-up control node, the first electrode is connected to the pull-down node, and the second electrode is connected to the second voltage terminal; and,
  • the pull-down node maintains the capacitor, the first terminal is connected to the pull-down node, and the second terminal is connected to the fourth voltage terminal.
  • the fourth voltage terminal may be a low voltage terminal, but is not limited to this.
  • the first gate drive signal output circuit may include a first output transistor and a first output pull-down transistor
  • the control electrode of the first output transistor is connected to the first pull-up node, the first electrode of the first output transistor is connected to the first clock signal terminal, and the second electrode of the first output transistor is connected to The first gate drive signal output terminal is connected;
  • the control electrode of the first output pull-down transistor is connected to the pull-down node, the first electrode of the first output pull-down transistor is connected to the first gate drive signal output terminal, and the first electrode of the first output pull-down transistor The two poles are connected to the second voltage terminal.
  • the second gate drive signal output circuit may include a second output transistor and a second output pull-down transistor
  • the control electrode of the second output transistor is connected to the second pull-up node, the first electrode of the second output transistor is connected to the second clock signal terminal, and the second electrode of the second output transistor is connected to The second gate drive signal output terminal is connected;
  • the control electrode of the second output pull-down transistor is connected to the pull-down node, the first electrode of the second output pull-down transistor is connected to the second gate drive signal output terminal, and the first electrode of the second output pull-down transistor The two poles are connected to the second voltage terminal.
  • the gate driving unit described in at least one embodiment of the present disclosure may further include a touch output Control circuit 17;
  • the touch output control circuit 17 is respectively connected to the touch output control terminal EN_T, the first gate drive signal output terminal OP1 and the second gate drive signal output terminal OP2, and is configured as a touch input at the touch output control terminal EN_T Under the control of the control output control signal, both the first gate drive signal output terminal OP1 and the second gate drive signal output terminal OP2 are controlled to output an invalid voltage.
  • the gate driving unit described in at least one embodiment of the present disclosure may further include a touch output control circuit 17.
  • the touch output control signal input at the touch output control terminal EN_T is Under control, both OP1 and OP2 are controlled to output invalid voltages to avoid false display caused by opening of the gate line on the display panel during the touch time period.
  • the gate driving unit described in at least one embodiment of the present disclosure may further include screen rest control. Circuit 18;
  • the rest screen control circuit 18 is used to control the first gate drive signal output terminal OP1 and the second gate drive signal output terminal to be both OP2 under the control of the screen control signal input from the screen control terminal EN. Output effective voltage.
  • the gate driving unit described in at least one embodiment of the present disclosure may further include a screen rest control circuit 18.
  • the rest screen control circuit 18 controls OP1 under the control of the rest screen control signal.
  • Both OP2 and OP2 output effective voltages to control the gate lines on the display panel to be turned on to release residual charges.
  • the gate driving unit of at least one of the present disclosure includes a start terminal, a first gate driving signal output terminal OP1, a second gate driving signal output terminal OP2, a pull-up control node control circuit 11, Pull-up node control circuit 12, first gate drive signal output circuit 13, second gate drive signal output circuit 14, pull-down node control circuit 15, reset circuit 16, touch output control circuit 17, and screen control circuit 18, among them,
  • the start end includes a forward odd line start end STVF_ODD, a reverse odd line start end STVB_ODD, a forward even line start end STVF_EVEN, and a reverse odd line start end STVB_EVEN;
  • the gate driving unit also includes a forward scan control end CN and reverse scan control terminal CNB;
  • the pull-up control node control circuit 11 includes:
  • the first forward scanning control transistor T1 has a gate connected to the forward scanning control terminal CN, and a drain connected to the start end SVTF_ODD of the forward odd-numbered row;
  • the second forward scanning control transistor T3 has a gate connected to the forward scanning control terminal CN, and a drain connected to the start end STVF_EVEN of the forward even-numbered row;
  • the first reverse scan control transistor T2 the gate is connected to the reverse scan control terminal CNB, the drain is connected to the gate of the first pull-up control node control transistor T5, and the source is connected to the start end of the reverse odd row STVB_ODD connection;
  • the second reverse scan control transistor T4 the gate is connected to the reverse scan control terminal CNB, the drain is connected to the gate of the second pull-up control node control transistor T6, and the source is connected to the start end of the reverse even row STVB_EVEN connection;
  • the first pull-up control node controls the transistor T5, the gate is connected to the source of the first forward scan control transistor T3, the drain is connected to the high voltage terminal, and the source is connected to the pull-up control node PUCN;
  • the high voltage terminal is used to input high voltage VGH;
  • the second pull-up control node controls the transistor T6, the gate is connected to the source of the second forward scan control transistor T3, the drain is connected to the high voltage terminal, and the source is connected to the pull-up control node PUCN;
  • a pull-up control node pull-down transistor T10 the gate is connected to the pull-down node PD, the drain is connected to the pull-up control node PUCN, and the source is connected to the low voltage terminal;
  • the pull-up control node maintains the capacitor C1, the first end is connected to the pull-up control node PUCN, and the second end is connected to the low voltage end; the low voltage end is used to input the low voltage VGL;
  • the pull-up node control circuit 12 includes:
  • the first pull-up node control transistor T11 has a gate connected to the high voltage terminal, a drain connected to the first pull-up node PU1, and a source connected to the pull-up control node PUCN; and,
  • the second pull-up node control transistor T12 has a gate connected to the high voltage terminal, a drain connected to the second pull-up node PU2, and a source connected to the pull-up control node PUCN;
  • the high voltage terminal is used to input a high voltage VGH;
  • the pull-down node control circuit 15 includes:
  • the first pull-down node control transistor T7 has a gate and a drain connected to the third clock signal terminal, and a source connected to the pull-down node PD; the third clock signal terminal CK3 is used to input a third clock signal;
  • the second pull-down node control transistor T8 has a gate and a source connected to the fourth clock signal terminal, and a drain connected to the pull-down node PD; the fourth clock signal terminal CK4 is used to input a fourth clock signal;
  • the third pull-down node control transistor T9 the gate is connected to the pull-up control node PUCN, the drain is connected to the pull-down node PD, and the source is connected to the low voltage terminal;
  • the pull-down node maintains a capacitor C2, the first end is connected to the pull-down node PD, and the second end is connected to the low voltage end;
  • the first gate drive signal output circuit 13 includes a first output transistor T13 and a first output pull-down transistor T15;
  • the gate of the first output transistor T13 is connected to the first pull-up node PU1, the drain of the first output transistor T13 is connected to the first clock signal terminal, and the source of the first output transistor T13
  • the pole is connected to the first gate drive signal output terminal OP1; the first clock signal terminal CK1 is used to input a first clock signal;
  • the gate of the first output pull-down transistor T15 is connected to the pull-down node PD, the drain of the first output pull-down transistor T15 is connected to the first gate drive signal output terminal OP1, and the first output pull-down The source of the transistor T15 is connected to the low voltage terminal.
  • the second gate drive signal output circuit 14 includes a second output transistor T14 and a second output pull-down transistor T16;
  • the gate of the second output transistor T14 is connected to the second pull-up node PU2, the drain of the second output transistor T14 is connected to the second clock signal terminal, and the source of the second output transistor T14
  • the pole is connected to the second gate drive signal output terminal OP2; the second clock signal terminal CK2 is used to input a second clock signal;
  • the gate of the second output pull-down transistor T16 is connected to the pull-down node PD, the drain of the second output pull-down transistor T16 is connected to the second gate drive signal output terminal OP2, and the second output pulls down
  • the source of the transistor T16 is connected to the low voltage terminal;
  • the reset circuit 16 includes a reset transistor T17;
  • the gate of the reset transistor T17 is connected to the blank area reset terminal Rst, the source of the reset transistor T17 is connected to the pull-down node PD, and the drain of the reset transistor T17 is connected to the low voltage terminal;
  • the touch output control circuit 17 includes a first touch output control transistor T18A and a second touch output control transistor T18B;
  • the gate of the first touch output control transistor T18A is connected to the touch output control terminal EN_T, the source of the first touch output control transistor T18A is connected to the first gate drive signal output terminal OP1, so The drain of the first touch output control transistor T18A is connected to the low voltage terminal;
  • the gate of the second touch output control transistor T18B is connected to the touch output control terminal EN_T, and the source of the second touch output control transistor T18B is connected to the second gate drive signal output terminal OP2 , The drain of the second touch output control transistor T18B is connected to the low voltage terminal;
  • the screen control circuit 18 includes a first screen control transistor T19A and a second screen control transistor T19B;
  • the gate of the first screen control transistor T19A and the source of the first screen control transistor T19A are both connected to the screen control terminal EN, and the drain of the first screen control transistor T19A is connected to the The first gate drive signal output terminal OP1 is connected;
  • the gate of the second screen control transistor T19B and the source of the second screen control transistor T19B are both connected to the screen control terminal EN, and the drain of the second screen control transistor T19B is connected to the The second gate drive signal output terminal OP2 is connected.
  • all the transistors are n-type thin film transistors, but not limited to this.
  • the effective voltage may be a high voltage
  • the invalid voltage may be a low voltage, but it is not limited to this.
  • the first voltage terminal is a high voltage terminal
  • the second voltage terminal, the third voltage terminal, and the fourth voltage terminal are all low voltage terminals. End, but not limited to this.
  • EN_T When at least one embodiment of the present disclosure shown in FIG. 9 is working, during the touch time period, EN_T outputs a high level, and T18A and T18B are both turned on to control both OP1 and OP2 to output low level to control the display panel All pixel units on the above are not working;
  • EN When the screen is abnormally powered off, EN inputs a high level, so that both OP1 and OP2 output high levels to control all gate lines to open to release the residual charge in the pixel unit.
  • At least one embodiment of the present disclosure as shown in FIG. 9 works, during forward scanning, CN inputs a high level, CNB inputs a low level, and both STVB_ODD and STVB_EVEN input a low level, which is the same as the conventional gate drive
  • the difference between the units is that, as shown in FIG. 10, at least one embodiment of the present disclosure divides one frame of picture display time TZ into a first display period Td1 and a second display period Td2, and the first output in the first display period Td1 During the time period, OP1 outputs high voltage, and during the second output time period within the second display period Td2, OP2 outputs high voltage;
  • the first display period Td1 includes a first input period t11, a first output period t12, a first output reset period t13, a first pull-down node control period t14, and a first output cut-off holding period t15 set in this way.
  • the second display period Td2 includes a second input time period t21, a second output time period t22, a second output reset time period t23, a second pull-down node control time period t24, and a second output cut-off holding time period t25 that are sequentially set;
  • a blank time period TB is set before the first display period Td1;
  • CK1 inputs low level. Due to the bootstrap action PU1's potential returns to the high level at t11, T13 remains open, OP1 outputs low level; CK2 inputs low level, OP2 outputs Low level
  • CK3 inputs a high level
  • T7 is turned on to pull up the potential of PD
  • T10, T15 and T16 are turned on to pull down the potential of PUCN to VGL
  • control OP1 and OP2 Both output low level
  • CK3 inputs low and high levels at intervals.
  • control T7 to open to maintain the potential of PD at high level, and maintain the potential of PUCN at VGL, control Both OP1 and OP2 output low level;
  • CK2 inputs low level. Due to the bootstrap action, the potential of PU2 returns to the high level at t21, T14 remains open, OP2 outputs low level; and CK1 inputs low level, OP1 outputs Low level
  • CK4 inputs a high level
  • T8 is turned on to pull up the potential of PD
  • T10, T15 and T16 are turned on to pull down the potential of PUCN to VGL, and control both OP1 and OP2 Output low level
  • CK4 inputs low and high levels at intervals.
  • control T8 to turn on to maintain the potential of PD at high level, and maintain the potential of PUCN at VGL, control Both OP1 and OP2 output low level.
  • the gate driving method is used to drive the above-mentioned gate driving unit.
  • the display time of one frame of picture includes a first display period and a second display period, and the first display period includes sequentially set A first input time period and a first output time period; the second display period includes a second input time period and a second output time period set in sequence; the gate driving method includes:
  • the pull-up control node control circuit controls the potential of the pull-up control node to be an effective voltage under the control of the start signal, and the pull-up node control circuit controls the node according to the pull-up control node. Control the potential of the first pull-up node and the potential of the second pull-up node to be effective voltages;
  • the pull-up control node control circuit maintains the potential of the pull-up control node at an effective voltage
  • the first clock signal terminal inputs an effective voltage
  • the first gate drive signal output circuit pulls up on the first Controlling the communication between the first gate driving signal output terminal and the first clock signal terminal under the control of the potential of the node, so as to control the first gate driving signal output terminal to output an effective voltage
  • the pull-up control node control circuit maintains the potential of the pull-up control node at an effective voltage
  • the second clock signal terminal inputs an effective voltage
  • the second gate drive signal output circuit performs the second pull-up Under the control of the potential of the node, the communication between the second gate drive signal output terminal and the second clock signal terminal is controlled to control the second gate drive signal output terminal to output an effective voltage
  • the gate driving method divides the display time of one frame into a first display period and a second display period.
  • the gate driving The first gate drive signal output circuit included in the unit controls the output of an effective voltage through the first gate drive signal output terminal.
  • the gate drive unit includes a second The gate drive signal output circuit outputs an effective voltage through the second gate drive signal output terminal.
  • the gate driving method described in at least one embodiment of the present disclosure divides the display time of one frame of screen into two display periods, and controls the output of a gate drive signal during the output period included in one display period.
  • the gate driving method described in an embodiment realizes alternate output of odd and even rows, which can reduce the refresh frequency.
  • the pulse width of the clock signal is guaranteed to be consistent with the high refresh frequency, which can achieve low power consumption while reducing the increase in Flicker (flicker) risks of.
  • the gate driving method described in at least one embodiment of the present disclosure can provide two levels of gate driving signal output, which can increase the wiring space of the display panel frame.
  • the first display period may further include a first output reset period and a first pull-down node control period set after the first output period
  • the second display period may also include setting In a second output reset period and a second pull-down node control period after the second output period
  • the gate driving method may further include:
  • the pull-up control node control circuit maintains the potential of the pull-up control node as a valid voltage, the first clock signal terminal inputs an invalid voltage, and the first gate drive signal output circuit is on the first Controlling the communication between the first gate drive signal output terminal and the first clock signal terminal under the control of the potential of the pull node, so as to control the first gate drive signal output terminal to output an invalid voltage;
  • the third clock signal terminal inputs an effective voltage
  • the pull-down node control circuit controls the pull-down node voltage to be the effective voltage under the control of the third clock signal
  • the first gate drive signal output circuit is Controlling the resetting of the first gate driving signal output from the first gate driving signal output terminal under the control of the potential of the pull-down node
  • the pull-up control node control circuit maintains the potential of the pull-up control node as a valid voltage, the second clock signal terminal inputs an invalid voltage, and the second gate drive signal output circuit is on the second upper Controlling the communication between the second gate drive signal output terminal and the second clock signal terminal under the control of the potential of the pull node, so as to control the second gate drive signal output terminal to output an invalid voltage;
  • the fourth clock signal terminal is input with an effective voltage
  • the pull-down node control circuit controls the pull-down node voltage to be the effective voltage under the control of the fourth clock signal
  • the second gate drive signal output circuit is at all Under the control of the potential of the pull-down node, the second gate driving signal output from the second gate driving signal output terminal is controlled to reset.
  • the pull-up control node control circuit maintains the potential of the pull-up control node as a valid voltage, and the first gate drive signal output circuit controls the first gate drive signal output terminal to output invalid Voltage; in the first pull-down node control period, the pull-down node control circuit controls the voltage of the pull-down node to be an effective voltage, and the first gate drive signal output circuit controls the first gate output to the first gate drive signal output terminal
  • the gate drive signal is reset; during the second output reset period, the pull-up control node control circuit maintains the potential of the pull-up control node as an effective voltage, and the second gate drive signal output circuit controls the second gate drive signal output terminal Output invalid voltage; during the second pull-down node control period, the pull-down node control circuit controls the voltage of the pull-down node to be an effective voltage, and the second gate drive signal output circuit controls the second gate drive signal output terminal The gate drive signal is reset.
  • the first display period further includes a first output cut-off holding period set after the first pull-down node control period
  • the second display period further includes a first output cut-off holding period set at the second pull-down node The second output cut-off holding period after the control period
  • the gate driving method further includes:
  • the pull-down node control circuit maintains the voltage of the pull-down node as an effective voltage, and the first gate drive signal output circuit controls the control of the first gate under the control of the potential of the pull-down node.
  • the first gate drive signal output from the pole drive signal output terminal is reset;
  • the pull-down node control circuit maintains the voltage of the pull-down node as an effective voltage, and the second gate drive signal output circuit controls the second gate under the control of the potential of the pull-down node.
  • the second gate drive signal output from the pole drive signal output terminal is reset.
  • the pull-down node control circuit maintains the voltage of the pull-down node as an effective voltage, and the first gate drive signal output circuit controls the first gate drive signal to reset;
  • the pull-down node control circuit maintains the voltage of the pull-down node as an effective voltage, and the second gate drive signal output circuit resets the second gate drive signal.
  • the gate driving method described in at least one embodiment of the present disclosure may further include:
  • the first gate drive signal output circuit is under the control of the potential of the first pull-up node, Control the communication between the first gate drive signal output terminal and the first clock signal terminal to control the first gate drive signal output terminal to output an invalid voltage, and the second gate drive signal output circuit pulls up on the second Controlling the communication between the second gate drive signal output terminal and the second clock signal terminal under the control of the potential of the node to control the second gate drive signal output terminal to output an invalid voltage;
  • the second clock signal terminal is input with an effective voltage
  • the second gate drive signal output circuit controls the second gate drive signal output terminal and the second gate drive signal output circuit under the control of the potential of the second pull-up node. Communication between the second clock signal terminals to control the second gate drive signal output terminal to output an invalid voltage
  • the first clock signal terminal is input with an effective voltage
  • the first gate drive signal output circuit controls the first gate drive signal output terminal and the first gate drive signal output circuit under the control of the potential of the first pull-up node
  • the first clock signal terminals are connected to each other to control the first gate drive signal output terminal to output an invalid voltage
  • the first gate drive signal output circuit controls the first gate drive signal output terminal to output an invalid voltage
  • the second gate drive signal output circuit controls the second gate
  • the second gate drive signal output circuit controls the second gate drive signal output end to output an invalid voltage
  • the first gate drive signal The output circuit controls the first gate drive signal output terminal to output an invalid voltage
  • the gate driving unit may further include a reset circuit
  • the gate driving method according to at least one embodiment of the present disclosure further includes:
  • the reset circuit controls the potential of the pull-down node to be an effective voltage under the control of the blank area reset signal input from the blank area reset terminal.
  • the reset circuit controls the potential of the pull-down node to be an effective voltage to drive the first gate drive signal and the second gate drive The signal is denoised.
  • the gate driving circuit described in at least one embodiment of the present disclosure includes multiple stages of the above-mentioned gate driving units.
  • the start end may include the start end of odd-numbered rows and the start end of even-numbered rows;
  • the start end of the odd-numbered row of each stage of the gate drive unit is connected to the first gate drive signal output terminal of the adjacent previous-stage gate drive unit.
  • the start end of the even-numbered row is connected to the second gate drive signal output end of the adjacent upper-level gate drive unit;
  • the start end of the odd-numbered row of the first-stage gate driving unit is connected to the first start signal input end, and the start end of the even-numbered row of the first-stage gate driving unit is connected to the second start signal input end.
  • the starting end may include a forward odd-numbered row starting end, a reverse odd-numbered row starting end, a forward even-numbered row starting end, and a reverse odd-numbered row starting end;
  • the gate driving unit may also Including forward scanning control terminal and reverse scanning control terminal;
  • the start end of the positive odd-numbered row of each stage of the gate drive unit is connected to the first gate drive signal output terminal of the adjacent previous-stage gate drive unit, and each stage of gate drive The start end of the positive even-numbered row of the unit is connected to the second gate drive signal output end of the adjacent upper-level gate drive unit;
  • the start end of the positive odd-numbered row of the first-stage gate drive unit is connected to the first forward start signal input end, and the start end of the forward even-numbered row of the first-stage gate drive unit and the second positive start signal input end connection;
  • the start end of the reverse odd-numbered row of each stage of the gate drive unit is connected to the first gate drive signal output terminal of the adjacent next-stage gate drive unit, and each stage of gate drive The start end of the reverse even-numbered row of the unit is connected to the second gate drive signal output end of the adjacent next-stage gate drive unit;
  • the start end of the reverse odd-numbered row of the last-stage gate drive unit is connected to the first reverse start signal input end, and the start end of the reverse even-numbered row of the last-stage gate drive unit and the second reverse start signal input end connection.
  • the first clock signal terminal of the 2n-1 stage gate drive unit is connected to the first clock signal input terminal, and the second clock signal terminal and the second clock signal input terminal of the 2n-1 stage gate drive unit Connected, the first clock signal terminal of the 2n-1 stage gate drive unit is connected to the fifth clock signal input terminal, and the second clock signal terminal of the 2n-1 stage gate drive unit is connected to the sixth clock signal input terminal;
  • the first clock signal terminal of the 2n-th stage gate drive unit is connected to the third clock signal input terminal
  • the second clock signal terminal of the 2n-th stage gate drive unit is connected to the fourth clock signal input terminal
  • the 2n-th stage gate drive unit is connected to the fourth clock signal input terminal.
  • the first clock signal terminal of the unit is connected to the seventh clock signal input terminal
  • the second clock signal terminal of the 2n-th stage gate driving unit is connected to the eighth clock signal input terminal;
  • n is a positive integer.
  • the gate driving circuit includes multiple stages of the above-mentioned gate driving units
  • the starting end in the gate driving unit includes a forward odd-numbered row starting end STVF_ODD, a reverse odd-numbered row starting end STVB_ODD, a forward even-numbered row starting end STVF_EVEN, and a reverse odd-numbered row starting end STVB_ODD;
  • OP1 of the odd-numbered gate drive unit is connected to the start end STVF_EVEN of the forward even-numbered row of the adjacent next-stage gate drive unit (even-numbered gate drive unit), and OP2 of the odd-numbered gate drive unit is connected to the adjacent next stage
  • the gate driving unit (even-numbered-stage gate driving unit) is connected to the start end STVF_ODD of the odd-numbered row;
  • OP2 of the even-numbered gate driving unit is opposite to the adjacent upper-stage gate driving unit (odd-stage gate driving unit) Connect to the even-numbered row start end STVB_EVEN, and the OP1 of the even-numbered-stage gate drive unit is connected to the reverse odd-numbered row start end STVB_ODD of the adjacent upper-level gate drive unit (odd-stage gate drive unit);
  • OP1 of the even-numbered gate drive unit is connected to the start end STVF_EVEN of the forward even-numbered row of the adjacent next-stage gate drive unit (odd-numbered gate drive unit), and OP2 of the even-numbered gate drive unit is connected to the adjacent next stage
  • the gate driving unit (odd-stage gate driving unit) is connected to the start end STVF_ODD of the odd-numbered row;
  • OP2 of the odd-numbered gate driving unit is opposite to the adjacent upper-stage gate driving unit (even-numbered gate driving unit) Connect to the even-numbered row start end STVB_EVEN, and the OP1 of the odd-numbered-stage gate drive unit is connected to the reverse odd-numbered row start end STVB_ODD of the adjacent upper-stage gate drive unit (even-numbered gate drive unit);
  • the first clock signal terminal CK1 of the odd-numbered gate drive unit is connected to the first input clock signal terminal CLK1, and the second clock signal terminal CK2 of the odd-numbered gate drive unit is connected to the second input clock signal terminal CLK2.
  • the third clock signal terminal CK3 of the gate driving unit is connected to the fifth input clock signal terminal CLK5, the fourth clock signal terminal CK4 of the odd-numbered gate driving unit is connected to the sixth input clock signal terminal CLK6; the even-numbered gate driving unit
  • the first clock signal terminal CK1 is connected to the third input clock signal terminal CLK3, the second clock signal terminal CK2 of the even-numbered gate drive unit is connected to the fourth input clock signal terminal CLK4, and the third clock of the even-numbered gate drive unit
  • the signal terminal CK3 is connected to the seventh input clock signal terminal CLK7, and the fourth clock signal terminal CK4 of the even stage gate driving unit is connected to the eighth input clock signal terminal CLK8.
  • the start signal of odd-numbered lines is labeled STV_O
  • the start signal of even-numbered lines is labeled STV_E.
  • FIG. 11 a four-stage gate drive unit is schematically shown, where the one labeled S1 is the first-stage gate drive unit, the one labeled S2 is the second-stage gate drive unit, and the one labeled S11 is The eleventh level gate driving unit, and the number S12 is the eleventh level gate driving unit;
  • the signal output terminal, marked Op4 is the second gate drive signal output terminal of S2
  • marked Op21 is the first gate drive signal output terminal of S11
  • marked Op22 is the second gate drive signal output of S11 Terminal
  • the first gate drive signal output terminal labeled Op23 is S12
  • the second gate drive signal output terminal labeled Op24 is S12;
  • Op1 is connected to the first row of gate lines
  • Op2 is connected to the second row of gate lines
  • Op3 is connected to the third row of gate lines
  • Op4 is connected to the fourth row of gate lines
  • Op21 is connected to the twenty-first row of gate lines
  • Op22 is connected to the first The twenty-two rows of gate lines
  • Op23 is connected to the twenty-third row of gate lines
  • Op24 is connected to the twenty-fourth row of gate lines.
  • the first frame image display time TZ1 is divided into a first display period Td1 and a first display period Td1 and a first display period TZ1.
  • the first input clock signal provided by CLK1, the third input clock signal provided by CLK3, the fifth input clock signal provided by CLK5, and the seventh input clock signal provided by CLK7 are clocks Signal
  • the period of the clock signal is T
  • the third input clock signal is delayed by T/4 than the first input clock signal
  • the fifth input clock signal is delayed by T/4 than the third input clock signal
  • the seventh input clock signal is longer than the fifth The input clock signal is delayed by T/4;
  • the first input clock signal provided by CLK1 the third input clock signal provided by CLK3, the fifth input clock signal provided by CLK5, and the seventh input clock signal provided by CLK7 are all Low level
  • the second input clock signal provided by CLK2 In the first display period Td1 and the third display period Td3, the second input clock signal provided by CLK2, the fourth input clock signal provided by CLK4, the sixth input clock signal provided by CLK6, and the eighth input clock signal provided by CLK8 are all Low level
  • the second input clock signal provided by CLK2 and the fourth display period Td4 the second input clock signal provided by CLK2, the fourth input clock signal provided by CLK4, the sixth input clock signal provided by CLK6, and the eighth input clock signal provided by CLK8, the The period of the clock signal is T, the fourth input clock signal is delayed by T/4 than the second input clock signal, the sixth input clock signal is delayed by T/4 than the fourth input clock signal, and the eighth input clock signal is longer than the sixth input clock signal.
  • the gate drive signal output terminal of the odd-numbered stage outputs the gate drive signal from top to bottom, and the gate drive signal output terminal of the even-numbered stage outputs a low level;
  • Td1 and Td3, Op1, Op3,..., Op21, Op23 output high level in turn, Op2, Op4,..., Op22, Op24 all output low level;
  • the gate drive signal output terminal of the even stage outputs the gate drive signal from top to bottom, and the gate drive signal output terminal of the odd stage outputs the low level; that is, in Td1 and Td3, Op2, Op4,..., Op22, Op24 output high level in turn, Op1, Op3,..., Op21, Op23 all output low level.
  • the gate driving circuit when the gate driving circuit according to at least one embodiment of the present disclosure performs forward scanning, in the first display period Td1 and the third display period Td3, the gate driving units of each level are from top to bottom.
  • the corresponding gate drive signal is output step by step through its first gate drive signal output terminal; in the second display period Td2 and the fourth display period Td4, each level of gate drive unit passes through its second gate step by step from top to bottom.
  • the pole drive signal output terminal outputs the corresponding gate drive signal.
  • At least one embodiment of the present disclosure reduces the refresh frequency from 60HZ to 30HZ, which can significantly reduce the power consumption of the display panel.
  • At least one embodiment of the present disclosure implements alternate odd-even output, and the pulse width of CLK is guaranteed to be
  • the refresh rate is the same when the refresh rate is 60HZ.
  • the first half of the frame will display the odd-line/even-line GOA-driven picture, and the second half of the frame will display the even-line/odd-line GOA-driven picture, which can achieve low power consumption.
  • reducing the refresh frequency can reduce the power consumption of the display panel.
  • the existing gate drive that scans all the gate lines sequentially from top to bottom during the display time of one frame is adopted.
  • the display time of one frame is divided into two display periods. The even-numbered grid lines are sequentially scanned in one display cycle, and the odd-numbered grid lines are sequentially scanned in the other display cycle. Since the duration of the display cycle is only It is half of the display time of one frame. After scanning the even-numbered gate lines, the odd-numbered gate lines are sequentially scanned from top to bottom in another display period, so that the multiple rows of pixel circuits connected to the odd-numbered gate lines emit light sequentially. Therefore, flicker can be reduced.
  • the first frame image display time TZ1 is divided into a first display period Td1 and a first display period Td1 and a first display period TZ1.
  • the first input clock signal provided by CLK1, the third input clock signal provided by CLK3, the fifth input clock signal provided by CLK5, and the seventh input clock signal provided by CLK7 are clocks Signal
  • the period of the clock signal is T
  • the third input clock signal is delayed by T/4 than the first input clock signal
  • the fifth input clock signal is delayed by T/4 than the third input clock signal
  • the seventh input clock signal is longer than the fifth The input clock signal is delayed by T/4;
  • the first input clock signal provided by CLK1 the third input clock signal provided by CLK3, the fifth input clock signal provided by CLK5, and the seventh input clock signal provided by CLK7 are all Low level
  • the second input clock signal provided by CLK2 In the first display period Td1 and the third display period Td3, the second input clock signal provided by CLK2, the fourth input clock signal provided by CLK4, the sixth input clock signal provided by CLK6, and the eighth input clock signal provided by CLK8 are all Low level
  • the second input clock signal provided by CLK2 and the fourth display period Td4 the second input clock signal provided by CLK2, the fourth input clock signal provided by CLK4, the sixth input clock signal provided by CLK6, and the eighth input clock signal provided by CLK8, the The period of the clock signal is T, the fourth input clock signal is delayed by T/4 than the second input clock signal, the sixth input clock signal is delayed by T/4 than the fourth input clock signal, and the eighth input clock signal is longer than the sixth input clock signal.
  • the gate drive signal output terminal of the odd-numbered stage outputs the gate drive signal from bottom to top step by step, and the gate drive signal output terminal of the even-numbered stage outputs a low level; that is, in Td1 And Td3, Op23, Op21,..., Op3, Op1 output high level in turn, Op24, Op22,..., Op4, Op2 all output low level;
  • the gate drive signal output terminal of the even-numbered stage outputs the gate drive signal from bottom to top step by step, and the gate drive signal output terminal of the odd-numbered stage outputs a low level; that is, in Td1 And Td3, Op2, Op4,..., Op22, Op24 output high level in turn, Op1, Op3,..., Op21, Op23 all output low level.
  • the gate driving circuit when the gate driving circuit according to at least one embodiment of the present disclosure is performing reverse scanning, in the first display period Td1 and the third display period Td3, the gate driving units of each level are stepped from bottom to top.
  • the stage outputs the corresponding gate drive signal through its first gate drive signal output terminal; in the second display period Td2 and the fourth display period Td4, the gate drive units of each stage are driven by their second gates from bottom to top.
  • the signal output terminal outputs the corresponding gate drive signal.
  • the gate driving method is applied to the above-mentioned gate driving circuit, and the display time of one frame of picture includes a first display period and a second display period; the gate driving method includes:
  • each level of the gate driving unit included in the gate driving circuit gradually outputs an effective voltage through its first gate driving signal output terminal;
  • each level of the gate driving unit included in the gate driving circuit gradually outputs an effective voltage through its second gate driving signal output terminal.
  • the gate driving method divides the display time of one frame into a first display period and a second display period.
  • the gate driving circuit includes various levels of gates.
  • the driving unit successively outputs an effective voltage through its first gate driving signal output terminal.
  • the gate driving units of each level included in the gate driving circuit successively pass its second gate driving signal output terminal. Output effective voltage.
  • the gate driving method described in at least one embodiment of the present disclosure realizes alternate output of odd and even rows, which can reduce the refresh frequency.
  • the pulse width of the clock signal is guaranteed to be consistent with the high refresh frequency, which can achieve low power consumption and reduce Flicker ( Blinking) increased risk.
  • the gate driving method described in at least one embodiment of the present disclosure can provide two levels of gate driving signal output, which can increase the wiring space of the display panel frame.
  • the first display period may include M display time periods set in sequence
  • the second display period includes M display time periods set in sequence
  • M is the total number of gate drive units included in the gate drive circuit.
  • the number of stages; the gate driving method includes: during forward scanning,
  • the m-th stage gate driving unit included in the gate driving circuit outputs an effective voltage through its first gate driving signal output terminal;
  • the m-th stage gate driving unit included in the gate driving circuit outputs an effective voltage through its second gate driving signal output terminal;
  • M is an integer greater than 1, and m is a positive integer less than or equal to M.
  • the first display period may include M display time periods that are sequentially set, and the second display period may include M display time periods that are sequentially set, where M is the total number of gate drive units included in the gate drive circuit.
  • the number of stages; the gate driving method includes: in reverse scanning,
  • the M-m+1-th stage gate drive unit included in the gate drive circuit outputs an effective voltage through its first gate drive signal output terminal;
  • the gate driving unit of the M-m+1th stage included in the gate driving circuit outputs an effective voltage through its second gate driving signal output terminal;
  • M is an integer greater than 1, and m is a positive integer less than or equal to M.
  • the display panel includes a display substrate, and the display panel further includes a 2M row of gate lines disposed on the display substrate and the aforementioned gate drive circuit; M is the gate drive The total number of stages of gate drive units included in the circuit;
  • the first gate drive signal output terminal of the m-th stage gate drive unit of the gate drive circuit is connected to the 2m-1th row gate line;
  • the second gate drive signal output terminal of the m-th stage gate drive unit of the gate drive circuit is connected to the 2m-th row gate line;
  • M is an integer greater than 1, and m is a positive integer less than or equal to M.
  • the display panel may include one of the gate drive circuits, and the gate drive circuit includes the first gate drive signal output terminal of the m-th stage gate drive unit and the 2m-1th row gate line Connected, the second gate drive signal output terminal of the m-th stage gate drive unit of the gate drive circuit is connected to the 2m-th row gate line, so as to provide the odd-numbered gate line through the first gate drive signal output terminal
  • the gate drive signal is used to provide gate drive signals for the even rows of gate lines through the second gate drive signal output terminal.
  • the display panel includes a display substrate, and the display panel further includes a 2M row of gate lines and two of the above-mentioned gate drive circuits arranged on the display substrate; M is the gate The total number of stages of gate drive units included in the pole drive circuit;
  • the first gate drive signal output terminal of the m-th stage gate drive unit of the first gate drive circuit is connected to the left end of the gate line of the 2m-1th row;
  • the second gate drive signal output terminal of the m-th stage gate drive unit of the first gate drive circuit is connected to the left end of the 2m-th row of gate lines;
  • the first gate drive signal output terminal of the m-th stage gate drive unit of the second gate drive circuit is connected to the right end of the gate line of the 2m-1th row;
  • the second gate driving signal output terminal of the m-th stage gate driving unit of the second gate driving circuit is connected to the right end of the 2m-th row of gate lines;
  • M is an integer greater than 1, and m is a positive integer less than or equal to M.
  • the display panel may include two of the gate driving circuits, the first gate driving signal output terminal of the m-th stage gate driving unit included in the first gate driving circuit and the 2m-th gate driving unit
  • the left end of the first gate line is connected, and the second gate drive signal output end of the m-th stage gate driving unit of the first gate driving circuit is connected to the left end of the 2m-th gate line to pass the first gate
  • the pole drive signal output terminal provides a gate drive signal for the left end of the odd-numbered row of gate lines, and the second gate drive signal output terminal provides a gate drive signal for the left end of the even-numbered row of gate lines;
  • the second gate drive circuit The first gate drive signal output terminal of the gate drive unit of the mth stage included is connected to the right end of the gate line of the 2m-1th row, and the second gate drive unit of the mth stage of the gate drive circuit is The gate drive signal output terminal is connected to the right end of the gate line of the 2m-th row to provide a gate drive signal to the right end
  • the display panel according to at least one embodiment of the present disclosure adopts two gate driving circuits to provide gate driving signals to the two ends of the gate line respectively, which can be applied to large-size and high-resolution display panels;
  • GOA Gate On Array
  • a gate drive circuit arranged on the array substrate in order to avoid GOA (Gate On Array, a gate drive circuit arranged on the array substrate) caused by unilateral driving, the far-end and near-end loads are inconsistent, causing the far-end and near-end pixels Due to different charging capabilities, insufficient charging or charging uniformity can be caused to enhance the stability of GOA output and achieve the same far-end output and near-end output.
  • the display panel according to at least one embodiment of the present disclosure adopts a bilateral drive mode.
  • the gate drive unit included in the gate drive circuit in the display panel can drive two rows of gate lines, Therefore, it can save space, avoid excessively large frame size of the display panel, and realize bilateral output in the wiring space of single-level output.
  • the current development direction of the shape of the display panel is to dissimilate the peripheral R arc angle, the U-shaped groove in the middle and the narrow frame design is required.
  • GOA uses unidirectional scanning, and there are no pixels in the U-shaped groove in the middle, so the pixels on the left and right sides need to be wound. Achieving gate drive will occupy a larger U-shaped groove frame space, and the deeper the U-shaped groove, the larger the frame space required, which makes it difficult to meet the narrow frame requirements.
  • at least one embodiment of the present disclosure is provided with gate driving circuits on both sides of the display panel.
  • the gate driving circuit on the left is connected to the left end of the corresponding row gate line, and the gate driving circuit on the right is connected to the corresponding row gate line. If the right side of the wire is connected, the gate drive can be realized without winding wire, which is beneficial to realize the narrow frame design at the U-shaped groove.
  • the display panel includes multiple rows of gate lines, a first gate driving circuit, and a second gate driving circuit;
  • the first gate drive signal output terminal of the first-stage gate drive unit Sz1 included in the first gate drive circuit is connected to the left end of the first row of gate lines GL1;
  • the second gate drive circuit includes a first
  • the first gate driving signal output terminal of the first-stage gate driving unit Sr1 is connected to the right end of the first row of gate lines GL1;
  • the second gate drive signal output terminal of the first-stage gate drive unit Sz1 included in the first gate drive circuit is connected to the left end of the second row of gate lines GL2; the second gate drive circuit includes the first The second gate driving signal output end of the first-stage gate driving unit Sr1 is connected to the right end of the second row of gate line GL2;
  • the first gate drive signal output terminal of the second-stage gate drive unit Sz2 included in the first gate drive circuit is connected to the left end of the third row of gate lines GL3;
  • the second gate drive circuit includes a second
  • the first gate driving signal output terminal of the first-stage gate driving unit Sr2 is connected to the right end of the third row of gate line GL1;
  • the second gate drive signal output end of the second-stage gate drive unit Sz2 included in the first gate drive circuit is connected to the left end of the fourth row of gate lines GL4;
  • the second gate drive circuit includes a second
  • the second gate driving signal output terminal of the first-stage gate driving unit Sr2 is connected to the right end of the fourth row of gate line GL4;
  • the first gate driving signal output terminal of the eleventh stage gate driving unit Sz11 included in the first gate driving circuit is connected to the left end of the twenty-first row of gate lines GL21;
  • the second gate driving circuit includes The first gate driving signal output terminal of the eleventh stage gate driving unit Sr11 is connected to the right end of the gate line GL21 in the twenty-first row;
  • the second gate drive signal output terminal of the eleventh stage gate drive unit Sz11 included in the first gate drive circuit is connected to the left end of the twenty-second row of gate lines GL22;
  • the second gate drive circuit includes
  • the second gate driving signal output terminal of the eleventh stage gate driving unit Sr11 is connected to the right end of the twenty-second row of gate lines GL22;
  • the first gate drive signal output terminal of the twelfth second-level gate drive unit Sz12 included in the first gate drive circuit is connected to the left end of the twenty-third row of gate lines GL23;
  • the second gate drive circuit includes The first gate driving signal output terminal of the twelfth second-level gate driving unit Sr12 is connected to the right end of the twenty-third row of gate lines GL23;
  • the second gate drive signal output terminal of the twelfth second-level gate drive unit Sz12 included in the first gate drive circuit is connected to the left end of the twenty-fourth row of gate lines GL24; the second gate drive circuit includes The second gate driving signal output terminal of the twelfth second-level gate driving unit Sr12 is connected to the right end of the gate line GL24 in the twenty-fourth row.
  • the first gate driving circuit is arranged on the left side of the display substrate, and the second gate driving circuit is arranged on the right side of the display substrate.
  • the terminal labeled CK1 is the first clock signal terminal
  • the terminal labeled CK2 is the second clock signal terminal
  • the terminal labeled CK3 is the third clock signal terminal
  • the terminal labeled CK4 is the fourth clock signal terminal.
  • CLK1 is the first input clock signal terminal
  • CLK2 is the second input clock signal terminal
  • CLK3 is the third input clock signal terminal
  • CLK4 is the fourth input clock signal terminal
  • the label is CLK5 Is the fifth input clock signal terminal
  • labeled CLK6 is the sixth input clock signal terminal
  • labeled CLK7 is the seventh input clock signal terminal
  • labeled CLK8 is the eighth input clock signal terminal
  • labeled STVF_ODD is The beginning of the forward odd-numbered line, the beginning of the reverse odd-numbered line marked STVB_ODD, the beginning of the forward even-numbered line marked STVF_EVEN, the beginning of the reverse odd-numbered line marked STVB_ODD, and the odd line marked STV_O
  • the start signal, labeled STV_E is the even-numbered row start signal
  • the one labeled OUT1 is the first gate drive signal output terminal
  • the one labeled OUT2 is the second gate drive signal output terminal.
  • the display device includes the above-mentioned display panel.
  • the display device provided by at least one embodiment of the present disclosure may be any product or component with a display function, such as a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital photo frame, and a navigator.
  • a display function such as a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital photo frame, and a navigator.
  • the gate driving unit, method, gate driving circuit, display panel, and device described in at least one embodiment of the present disclosure divide the display time of one frame of picture into two display periods, and the output time period included in one display period Controlling the output of a gate drive signal can achieve alternate odd and even row output, which can reduce the refresh frequency.
  • the pulse width of the clock signal is guaranteed to be consistent with the high refresh frequency, which can achieve low power consumption and reduce the risk of flicker (flicker) increase
  • the gate driving unit described in at least one embodiment of the present disclosure can provide two-level gate driving signal output, which can increase the wiring space of the display panel frame.

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Abstract

一种栅极驱动单元、方法、栅极驱动电路、显示面板和装置。栅极驱动单元包括起始端、第一栅极驱动信号输出端和第二栅极驱动信号输出端,栅极驱动单元还包括上拉控制节点控制电路(11);上拉节点控制电路(12),配置为根据上拉控制节点的电位,控制第一上拉节点的电位和第二上拉节点的电位;第一栅极驱动信号输出电路(13);第二栅极驱动信号输出电路(14);以及下拉节点控制电路(15),配置为在第三时钟信号和第四时钟信号的控制下,控制并维持下拉节点的电位,在上拉控制节点的电位的控制下,对下拉节点的电位进行复位。

Description

栅极驱动单元、方法、栅极驱动电路、显示面板和装置 技术领域
本公开涉及显示驱动技术领域,尤其涉及一种栅极驱动单元、方法、栅极驱动电路、显示面板和装置。
背景技术
移动产品更新换代极快,产品朝着轻薄化、精细化和超长待机的趋势发展,从客户体验角度,对屏幕的边框要求越来越窄,待机时间更长。因此开发出支持窄边框、驱动能力强、和在低频率降低功耗条件下不增大Flicker(闪烁)不良的GOA(Gate On Array,设置于阵列基板上的栅极驱动电路),对于提升显示器件竞争力有极大的作用。
传统的栅极驱动单元只能驱动一行栅线,有多少行栅线,即需要多少个栅极驱动单元进行驱动。尤其对于大尺寸分辨率高的显示面板,为了避免单边驱动造成的栅极驱动单元输出远端和近端负载不一致,进而引起远端与近端像素充电因能力不同造充电不足或者充电均一性的问题,而进行双边驱动的显示产品可以解决驱动能力不一致的问题,但带来两侧各需要与栅线数量相等的栅极驱动单元进行驱动,造成显示面板边框尺寸过大。
并且,由于对显示产品分辨率越来越高,功耗也随着分辨率的增大而增大,待机时间大大减小,为了克服由于分辨率太大导致的待机时间减小,并降低功耗,降低显示器件的刷新频率是显著降低功耗的有效方法,但降低刷新频率会带来闪烁偏高不良的发生。
发明内容
在一个方面中,本公开实施例提供了一种栅极驱动单元,包括起始端、第一栅极驱动信号输出端和第二栅极驱动信号输出端;
上拉控制节点控制电路,配置为在所述起始端输入的起始信号的控制下,控制并维持上拉控制节点的电位为有效电压,并在下拉节点的电位的控制下,控制所述上拉控制节点的电位为无效电压;
上拉节点控制电路,配置为根据所述上拉控制节点的电位,控制第一上拉节点的电位和第二上拉节点的电位;
第一栅极驱动信号输出电路,配置为在所述第一上拉节点的电位的控制下,控制所述第一栅极驱动信号输出端与第一时钟信号端之间连通,在所述下拉节点的电位的控制下,控制对所述第一栅极驱动信号输出端输出的第一栅极驱动信号进行复位;
第二栅极驱动信号输出电路,配置为在所述第二上拉节点的电位的控制下,控制所述第二栅极驱动信号输出端与第二时钟信号端之间连通,在所述下拉节点的电位的控制下,控制对所述第二栅极驱动信号输出端输出的第二栅极驱动信号进行复位;以及,
下拉节点控制电路,配置为在第三时钟信号端输入的第三时钟信号和第四时钟信号端输入的第四时钟信号的控制下,控制并维持所述下拉节点的电位,在所述上拉控制节点的电位的控制下,对所述下拉节点的电位进行复位。
可选的,所述起始端包括奇数行起始端和偶数行起始端;
所述上拉控制节点控制电路配置为当所述奇数行起始端输入有效电压时,控制并维持所述上拉控制节点的电位为有效电压,并当所述偶数行起始端输入有效电压时,控制并维持所述上拉控制节点的电位为有效电压,当所述下拉节点的电位为有效电压时,控制所述上拉控制节点的电位为无效电压。
可选的,所述上拉控制节点控制电路包括:
第一晶体管,控制极与所述奇数行起始端连接,第一极与第一电压端连接,第二极与所述上拉控制节点连接;
第二晶体管,控制极与所述偶数行起始端连接,第一极与第一电压端连接,第二极与所述上拉控制节点连接;
上拉控制节点下拉晶体管,控制极与所述下拉节点连接,第一极与所述上拉控制节点连接,第二极与第二电压端连接;以及,
上拉控制节点维持电容,第一端与所述上拉控制节点连接,第二端与第三电压端连接。
可选的,所述起始端包括正向奇数行起始端、反向奇数行起始端、正向偶数行起始端和反向奇数行起始端;所述栅极驱动单元还包括正向扫描控制 端和反向扫描控制端;
所述上拉控制节点控制电路配置为在正向扫描时,在所述正向扫描控制端输入的正向扫描控制信号的控制下,当所述正向奇数行起始端输入有效电压时,控制所述上拉控制节点的电位为有效电压,并当所述正向偶数行起始端输入有效电压时,控制并维持所述上拉控制节点的电位为有效电压;
所述上拉控制节点控制电路还配置为在反向扫描时,在所述反向扫描控制端输入的反向扫描控制信号的控制下,当所述反向奇数行起始端输入有效电压时,控制所述上拉控制节点的电位为有效电压,并当所述反向偶数行起始端输入有效电压时,控制并维持所述上拉控制节点的电位为有效电压;
所述上拉控制节点控制电路还配置为当所述下拉节点的电位为有效电压时,控制所述上拉控制节点的电位为无效电压。
可选的,所述上拉控制节点控制电路包括:
第一正向扫描控制晶体管,控制极与所述正向扫描控制端连接,第一极与所述正向奇数行起始端连接;
第二正向扫描控制晶体管,控制极与所述正向扫描控制端连接,第一极与所述正向偶数行起始端连接;
第一反向扫描控制晶体管,控制极与所述反向扫描控制端连接,第一极与第一上拉控制节点控制晶体管的控制极连接,第二极与所述反向奇数行起始端连接;
第二反向扫描控制晶体管,控制极与所述反向扫描控制端连接,第一极与第二上拉控制节点控制晶体管的控制极连接,第二极与所述反向偶数行起始端连接;
第一上拉控制节点控制晶体管,控制极与所述第一正向扫描控制晶体管的第二极连接,第一极与所述第一电压端连接,第二极与所述上拉控制节点连接;
第二上拉控制节点控制晶体管,控制极与所述第二正向扫描控制晶体管的第二极连接,第一极与所述第一电压端连接,第二极与所述上拉控制节点连接;
上拉控制节点下拉晶体管,控制极与所述下拉节点连接,第一极与所述 上拉控制节点连接,第二极与第二电压端连接;以及,
上拉控制节点维持电容,第一端与所述上拉控制节点连接,第二端与第三电压端连接。
可选的,本公开至少一实施例所述的栅极驱动单元还包括复位电路;
所述复位电路配置为在空白区复位端输入的空白区复位信号的控制下,控制所述下拉节点的电位为有效电压。
可选的,所述上拉节点控制电路包括:
第一上拉节点控制晶体管,控制极与第一电压端连接,第一极与所述第一上拉节点连接,第二极与所述上拉控制节点连接;以及,
第二上拉节点控制晶体管,控制极与所述第一电压端连接,第一极与所述第二上拉节点连接,第二极与所述上拉控制节点连接。
可选的,所述下拉节点控制电路包括:
第一下拉节点控制晶体管,控制极和第一极都与所述第三时钟信号端连接,第二极与所述下拉节点连接;
第二下拉节点控制晶体管,控制极和第二极都与所述第四时钟信号端连接,第一极与所述下拉节点连接;
第三下拉节点控制晶体管,控制极与所述上拉控制节点连接,第一极与所述下拉节点连接,第二极与第二电压端连接;以及,
下拉节点维持电容,第一端与所述下拉节点连接,第二端与第四电压端连接。
可选的,所述第一栅极驱动信号输出电路包括第一输出晶体管和第一输出下拉晶体管;
所述第一输出晶体管的控制极与所述第一上拉节点连接,所述第一输出晶体管的第一极与所述第一时钟信号端连接,所述第一输出晶体管的第二极与所述第一栅极驱动信号输出端连接;
所述第一输出下拉晶体管的控制极与所述下拉节点连接,所述第一输出下拉晶体管的第一极与所述第一栅极驱动信号输出端连接,所述第一输出下拉晶体管的第二极与第二电压端连接。
可选的,所述第二栅极驱动信号输出电路包括第二输出晶体管和第二输 出下拉晶体管;
所述第二输出晶体管的控制极与所述第二上拉节点连接,所述第二输出晶体管的第一极与所述第二时钟信号端连接,所述第二输出晶体管的第二极与所述第二栅极驱动信号输出端连接;
所述第二输出下拉晶体管的控制极与所述下拉节点连接,所述第二输出下拉晶体管的第一极与所述第二栅极驱动信号输出端连接,所述第二输出下拉晶体管的第二极与第二电压端连接。
可选的,本公开至少一实施例所述的栅极驱动单元还包括触控输出控制电路;
所述触控输出控制电路配置为在触控输出控制端输入的触控输出控制信号的控制下,控制所述第一栅极驱动信号输出端和所述第二栅极驱动信号输出端都输出无效电压。
可选的,本公开至少一实施例所述的栅极驱动单元还包括息屏控制电路;
所述息屏控制电路用于在息屏控制端输入的息屏控制信号的控制下,控制所述第一栅极驱动信号输出端和所述第二栅极驱动信号输出端都输出有效电压。
在第二个方面中,本公开实施例还提供了一种栅极驱动方法,用于驱动上述的栅极驱动单元,一帧画面显示时间包括第一显示周期和第二显示周期,所述第一显示周期包括依次设置的第一输入时间段和第一输出时间段;所述第二显示周期包括依次设置的第二输入时间段和第二输出时间段;所述栅极驱动方法包括:
在第一输入时间段和第二输入时间段,上拉控制节点控制电路在起始信号的控制下,控制上拉控制节点的电位为有效电压,上拉节点控制电路根据所述上拉控制节点的电位,控制第一上拉节点的电位和第二上拉节点的电位为有效电压;
在第一输出时间段,上拉控制节点控制电路维持所述上拉控制节点的电位为有效电压,第一时钟信号端输入有效电压,第一栅极驱动信号输出电路在所述第一上拉节点的电位的控制下,控制所述第一栅极驱动信号输出端与第一时钟信号端之间连通,以控制第一栅极驱动信号输出端输出有效电压;
在第二输出时间段,上拉控制节点控制电路维持所述上拉控制节点的电位为有效电压,第二时钟信号端输入有效电压,第二栅极驱动信号输出电路在所述第二上拉节点的电位的控制下,控制所述第二栅极驱动信号输出端与第二时钟信号端之间连通,以控制第二栅极驱动信号输出端输出有效电压。
可选的,所述第一显示周期还包括设置于所述第一输出时间段之后的第一输出复位时间段和第一下拉节点控制时间段,所述第二显示周期还包括设置于所述第二输出时间段之后的第二输出复位时间段和第二下拉节点控制时间段,所述栅极驱动方法还包括:
在第一输出复位时间段,上拉控制节点控制电路维持所述上拉控制节点的电位为有效电压,第一时钟信号端输入无效电压,第一栅极驱动信号输出电路在所述第一上拉节点的电位的控制下,控制所述第一栅极驱动信号输出端与第一时钟信号端之间连通,以控制第一栅极驱动信号输出端输出无效电压;
在第一下拉节点控制时间段,第三时钟信号端输入有效电压,下拉节点控制电路在第三时钟信号的控制下,控制下拉节点的电压为有效电压,第一栅极驱动信号输出电路在所述下拉节点的电位的控制下,控制对所述第一栅极驱动信号输出端输出的第一栅极驱动信号进行复位;
在第二输出复位时间段,上拉控制节点控制电路维持所述上拉控制节点的电位为有效电压,第二时钟信号端输入无效电压,第二栅极驱动信号输出电路在所述第二上拉节点的电位的控制下,控制所述第二栅极驱动信号输出端与第二时钟信号端之间连通,以控制第二栅极驱动信号输出端输出无效电压;
在第二下拉节点控制时间段,第四时钟信号端输入有效电压,下拉节点控制电路在第四时钟信号的控制下,控制下拉节点的电压为有效电压,第二栅极驱动信号输出电路在所述下拉节点的电位的控制下,控制对所述第二栅极驱动信号输出端输出的第二栅极驱动信号进行复位。
可选的,所述第一显示周期还包括设置于所述第一下拉节点控制时间段之后的第一输出截止保持时间段,所述第二显示周期还包括设置于所述第二下拉节点控制时间段之后的第二输出截止保持时间段;所述栅极驱动方法还 包括:
在第一输出截止保持时间段,下拉节点控制电路维持所述下拉节点的电压为有效电压,第一栅极驱动信号输出电路在所述下拉节点的电位的控制下,控制对所述第一栅极驱动信号输出端输出的第一栅极驱动信号进行复位;
在第二输出截止保持时间段,下拉节点控制电路维持所述下拉节点的电压为有效电压,第二栅极驱动信号输出电路在所述下拉节点的电位的控制下,控制对所述第二栅极驱动信号输出端输出的第二栅极驱动信号进行复位。
可选的,本公开至少一实施例所述的栅极驱动方法还包括:
在第一输入时间段和第二输入时间段,第一时钟信号端和第二时钟信号端输入无效电压,第一栅极驱动信号输出电路在所述第一上拉节点的电位的控制下,控制所述第一栅极驱动信号输出端与第一时钟信号端之间连通,以控制第一栅极驱动信号输出端输出无效电压,第二栅极驱动信号输出电路在所述第二上拉节点的电位的控制下,控制所述第二栅极驱动信号输出端与第二时钟信号端之间连通,以控制第二栅极驱动信号输出端输出无效电压;
在第一输出时间段,第二时钟信号端输入有效电压,第二栅极驱动信号输出电路在所述第二上拉节点的电位的控制下,控制所述第二栅极驱动信号输出端与第二时钟信号端之间连通,以控制第二栅极驱动信号输出端输出无效电压;
在第二输出时间段,第一时钟信号端输入有效电压,第一栅极驱动信号输出电路在所述第一上拉节点的电位的控制下,控制所述第一栅极驱动信号输出端与第一时钟信号端之间连通,以控制第一栅极驱动信号输出端输出无效电压。
可选的,所述栅极驱动单元还包括复位电路,本公开至少一实施例所述的栅极驱动方法还包括:
在两显示周期之间设置的空白时间段,所述复位电路在空白区复位端输入的空白区复位信号的控制下,控制下拉节点的电位为有效电压。
在第三个方面中,本公开实施例还提供了一种栅极驱动电路,包括多级上述的栅极驱动单元。
可选的,所述起始端包括奇数行起始端和偶数行起始端;
除了第一级栅极驱动单元,每一级栅极驱动单元的奇数行起始端与相邻上一级栅极驱动单元的第一栅极驱动信号输出端连接,每一级栅极驱动单元的偶数行起始端与相邻上一级栅极驱动单元的第二栅极驱动信号输出端连接;
第一级栅极驱动单元的奇数行起始端与第一起始信号输入端连接,第一级栅极驱动单元的偶数行起始端与第二起始信号输入端连接。
可选的,所述起始端包括正向奇数行起始端、反向奇数行起始端、正向偶数行起始端和反向奇数行起始端;所述栅极驱动单元还包括正向扫描控制端和反向扫描控制端;
除了第一级栅极驱动单元,每一级栅极驱动单元的正向奇数行起始端与相邻上一级栅极驱动单元的第一栅极驱动信号输出端连接,每一级栅极驱动单元的正向偶数行起始端与相邻上一级栅极驱动单元的第二栅极驱动信号输出端连接;
第一级栅极驱动单元的正向奇数行起始端与第一正向起始信号输入端连接,第一级栅极驱动单元的正向偶数行起始端与第二正向起始信号输入端连接;
除了最后一级栅极驱动单元,每一级栅极驱动单元的反向奇数行起始端与相邻下一级栅极驱动单元的第一栅极驱动信号输出端连接,每一级栅极驱动单元的反向偶数行起始端与相邻下一级栅极驱动单元的第二栅极驱动信号输出端连接;
最后一级栅极驱动单元的反向奇数行起始端与第一反向起始信号输入端连接,最后一级栅极驱动单元的反向偶数行起始端与第二反向起始信号输入端连接。
可选的,第2n-1级栅极驱动单元的第一时钟信号端与第一时钟信号输入端连接,第2n-1级栅极驱动单元的第二时钟信号端与第二时钟信号输入端连接,第2n-1级栅极驱动单元的第一时钟信号端与第五时钟信号输入端连接,第2n-1级栅极驱动单元的第二时钟信号端与第六时钟信号输入端连接;
第2n级栅极驱动单元的第一时钟信号端与第三时钟信号输入端连接,第2n级栅极驱动单元的第二时钟信号端与第四时钟信号输入端连接,第2n级栅极驱动单元的第一时钟信号端与第七时钟信号输入端连接,第2n级栅极驱 动单元的第二时钟信号端与第八时钟信号输入端连接;
n为正整数。
在第四个方面中,本公开实施例还提供了一种栅极驱动方法,应用于上述的栅极驱动电路,一帧画面显示时间包括第一显示周期和第二显示周期;所述栅极驱动方法包括:
在第一显示周期,所述栅极驱动电路包括的各级栅极驱动单元逐级通过其第一栅极驱动信号输出端输出有效电压;
在第二显示周期,所述栅极驱动电路包括的各级栅极驱动单元逐级通过其第二栅极驱动信号输出端输出有效电压。
可选的,第一显示周期包括依次设置的M个显示时间段,第二显示周期包括依次设置的M个显示时间段,M为所述栅极驱动电路包括的栅极驱动单元的总级数;所述栅极驱动方法包括:在正向扫描时,
在所述第一显示周期中的第m个显示时间段,所述栅极驱动电路包括的第m级栅极驱动单元通过其第一栅极驱动信号输出端输出有效电压;
在所述第二显示周期中的第m个显示时间段,所述栅极驱动电路包括的第m级栅极驱动单元通过其第二栅极驱动信号输出端输出有效电压;
M为大于1的整数,m为小于或等于M的正整数。
可选的,第一显示周期包括依次设置的M个显示时间段,第二显示周期包括依次设置的M个显示时间段,M为所述栅极驱动电路包括的栅极驱动单元的总级数;所述栅极驱动方法包括:在反向扫描时,
在所述第一显示周期中的第m个显示时间段,所述栅极驱动电路包括的第M-m+1级栅极驱动单元通过其第一栅极驱动信号输出端输出有效电压;
在所述第二显示周期中的第m个显示时间段,所述栅极驱动电路包括的第M-m+1级栅极驱动单元通过其第二栅极驱动信号输出端输出有效电压;
M为大于1的整数,m为小于或等于M的正整数。
在第五个方面中,本公开实施例还提供了一种显示面板,包括显示基板,还包括设置于所述显示基板上的2M行栅线和上述的栅极驱动电路;M为所述栅极驱动电路包括的栅极驱动单元的总级数;
所述栅极驱动电路的第m级栅极驱动单元的第一栅极驱动信号输出端与 第2m-1行栅线连接;
所述栅极驱动电路的第m级栅极驱动单元的第二栅极驱动信号输出端与第2m行栅线连接;
M为大于1的整数,m为小于或等于M的正整数。
在第六个方面中,本公开实施例还提供了一种显示面板,包括显示基板,还包括设置于所述显示基板上的2M行栅线和两个上述的栅极驱动电路;M为所述栅极驱动电路包括的栅极驱动单元的总级数;
第一个所述栅极驱动电路的第m级栅极驱动单元的第一栅极驱动信号输出端与第2m-1行栅线的左端连接;
第一个所述栅极驱动电路的第m级栅极驱动单元的第二栅极驱动信号输出端与第2m行栅线的左端连接;
第二个所述栅极驱动电路的第m级栅极驱动单元的第一栅极驱动信号输出端与第2m-1行栅线的右端连接;
第二个所述栅极驱动电路的第m级栅极驱动单元的第二栅极驱动信号输出端与第2m行栅线的右端连接;
M为大于1的整数,m为小于或等于M的正整数。
在第七个方面中,本公开实施例还提供了一种显示装置,包括上述的显示面板。
附图说明
图1是本公开的至少一实施例所述的栅极驱动单元的结构图;
图2是本公开的至少一实施例所述的栅极驱动单元的结构图;
图3是本公开的至少一实施例所述的栅极驱动单元的结构图;
图4是本公开的至少一实施例所述的栅极驱动单元的结构图;
图5是本公开的至少一实施例所述的栅极驱动单元的结构图;
图6是本公开的至少一实施例所述的栅极驱动单元的结构图;
图7是本公开的至少一实施例所述的栅极驱动单元的结构图;
图8是本公开的至少一实施例所述的栅极驱动单元的结构图;
图9是本公开的至少一实施例所述的栅极驱动单元的电路图;
图10是本公开如图9所示的至少一实施例所述的栅极驱动单元的工作时序图;
图11是本公开的至少一实施例所述的栅极驱动电路的结构图;
图12是本公开的至少一实施例所述的栅极驱动电路在正向扫描时的工作时序图;
图13是本公开的至少一实施例所述的栅极驱动电路在反向扫描时的工作时序图;
图14是本公开的至少一实施例所述的显示面板包括的两个栅极驱动电路与多行栅线的连接关系示意图。
具体实施方式
下面将结合本公开实施例中的附图,对本公开实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本公开一部分实施例,而不是全部的实施例。基于本公开中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本公开保护的范围。
本公开所有实施例中采用的晶体管均可以为三极管、薄膜晶体管或场效应管或其他特性相同的器件。在本公开实施例中,为区分晶体管除控制极之外的两极,将其中一极称为第一极,另一极称为第二极。
在实际操作时,当所述晶体管为三极管时,所述控制极可以为基极,所述第一极可以为集电极,所述第二极可以发射极;或者,所述控制极可以为基极,所述第一极可以为发射极,所述第二极可以集电极。
在实际操作时,当所述晶体管为薄膜晶体管或场效应管时,所述控制极可以为栅极,所述第一极可以为漏极,所述第二极可以为源极;或者,所述控制极可以为栅极,所述第一极可以为源极,所述第二极可以为漏极。
如图1所示,本公开的至少一实施例所述的栅极驱动单元包括起始端STV、第一栅极驱动信号输出端OP1、第二栅极驱动信号输出端OP2、上拉控制节点控制电路11、上拉节点控制电路12、第一栅极驱动信号输出电路13、第二栅极驱动信号输出电路14和下拉节点控制电路15;
所述上拉控制节点控制电路11分别与起始端STV、所述上拉控制节点 PUCN和下拉节点PD连接,配置为在所述起始端STV输入的起始信号的控制下,控制并维持上拉控制节点PUCN的电位为有效电压,并在下拉节点PD的电位的控制下,控制所述上拉控制节点PUCN的电位为无效电压;
所述上拉节点控制电路12分别与上拉控制节点PUCN、第一上拉节点PU1和第二上拉节点PU2连接,配置为根据所述上拉控制节点PUCN的电位,控制第一上拉节点PU1的电位和第二上拉节点PU2的电位;
所述第一栅极驱动信号输出电路13分别与所述第一上拉节点PU1、所述第一栅极驱动信号输出端OP1、第一时钟信号端和下拉节点PD连接,配置为在所述第一上拉节点PU1的电位的控制下,控制所述第一栅极驱动信号输出端OP1与第一时钟信号端之间连通,在所述下拉节点PD的电位的控制下,控制对所述第一栅极驱动信号输出端OP1输出的第一栅极驱动信号进行复位;所述第一时钟信号端CK1用于输入第一时钟信号;
所述第二栅极驱动信号输出电路14分别与所述第二上拉节点PU2、所述第二栅极驱动信号输出端OP2、第二时钟信号端和所述下拉节点PD连接,配置为在所述第二上拉节点PU2的电位的控制下,控制所述第二栅极驱动信号输出端OP2与第二时钟信号端之间连通,在所述下拉节点PD的电位的控制下,控制对所述第二栅极驱动信号输出端OP2输出的第二栅极驱动信号进行复位;以及,
所述下拉节点控制电路15分别与第三时钟信号端、第四时钟信号端、下拉节点PD和上拉控制节点PUCN连接,配置为在第三时钟信号端CK3输入的第三时钟信号和第四时钟信号端CK4输入的第四时钟信号的控制下,控制并维持所述下拉节点PD的电位,在所述上拉控制节点PUCN的电位的控制下,对所述下拉节点PD的电位进行复位;
所述第二时钟信号端CK2用于输入第二时钟信号。
在本公开的至少一实施例所述的栅极驱动单元工作时,将一帧画面显示时间划分为第一显示周期和第二显示周期,在第一显示周期包括的第一输出时间段,所述栅极驱动单元包括的第一栅极驱动信号输出电路13控制通过所述第一栅极驱动信号输出端OP1输出有效电压,在第二显示周期包括的第二输出时间段,所述栅极驱动单元包括的第二栅极驱动信号输出电路14通过所 述第二栅极驱动信号输出端OP2输出有效电压。
可选的,一帧画面显示时间可以包括依次设置的第一显示周期和第二显示周期,也即第一显示周期在前,第二显示周期在后,但不以此为限;
可选的,一帧画面显示时间可以包括依次设置的第二显示周期和第一显示周期,也即第二显示周期在前,第一显示周期在后,但不以此为限。
可选的,所述有效电压为能够控制栅极接入其的晶体管打开的电压,例如,当该晶体管为n型晶体管时,所述有效电压可以为高电压,但不以此为限;当该晶体管为p型晶体管时,所述有效电压可以为低电压,但不以此为限。
可选的,所述无效电压为能够控制栅极接入其的晶体管关断的电压,例如,当该晶体管为n型晶体管时,所述无效电压可以为低电压,但不以此为限;当该晶体管为p型晶体管时,所述无效电压可以为高电压,但不以此为限。
本公开的至少一实施例所述的栅极驱动单元将一帧画面显示时间划分为两个显示周期,在一所述显示周期包括的输出时间段控制输出一个栅极驱动信号,本公开的至少一实施例所述的栅极驱动单元实现奇偶行交替输出,可降低刷新频率,以实现低功耗的同时,降低Flicker(闪烁)增大的风险。并且,本公开的至少一实施例所述的栅极驱动单元能够提供两级栅极驱动信号输出,能够增大显示面板边框的布线空间。
在本公开的至少一实施例所述的栅极驱动单元工作时,第一显示周期包括依次设置的第一输入时间段、第一输出时间段、第一输出复位时间段、第一下拉节点控制时间段和第一输出截止保持时间段;第二显示周期包括依次设置的第二输入时间段、第二输出时间段、第二输出复位时间段、第二下拉节点控制时间段和第二输出截止保持时间段;所述栅极驱动方法还包括:
在第一输入时间段和第二输入时间段,上拉控制节点控制电路11在起始信号的控制下,控制上拉控制节点PUCN的电位为有效电压,上拉节点控制电路12根据所述上拉控制节点PUCN的电位,控制第一上拉节点PU1的电位和第二上拉节点PU2的电位为有效电压;
在第一输出时间段,上拉控制节点控制电路11维持所述上拉控制节点 PUCN的电位为有效电压,第一时钟信号端输入有效电压,第一栅极驱动信号输出电路13在所述第一上拉节点PU1的电位的控制下,控制所述第一栅极驱动信号输出端OP1与第一时钟信号端之间连通,以控制第一栅极驱动信号输出端OP1输出有效电压;
在第一输出复位时间段,上拉控制节点控制电路11维持所述上拉控制节点PUCN的电位为有效电压,第一时钟信号端输入无效电压,第一栅极驱动信号输出电路13在所述第一上拉节点PU1的电位的控制下,控制所述第一栅极驱动信号输出端OP1与第一时钟信号端之间连通,以控制第一栅极驱动信号输出端OP1输出无效电压;
在第一下拉节点控制时间段,第三时钟信号端输入有效电压,下拉节点控制电路15在CK3输入的第三时钟信号的控制下,控制下拉节点PD的电压为有效电压,第一栅极驱动信号输出电路13在所述下拉节点PD的电位的控制下,控制对所述第一栅极驱动信号输出端输出的第一栅极驱动信号进行复位;
在第一输出截止保持时间段,下拉节点控制电路15维持所述下拉节点PD的电压为有效电压,第一栅极驱动信号输出电路13在所述下拉节点PD的电位的控制下,控制对所述第一栅极驱动信号输出端OP1输出的第一栅极驱动信号进行复位;
在第二输出时间段,上拉控制节点控制电路11维持所述上拉控制节点PUCN的电位为有效电压,第二时钟信号端输入有效电压,第二栅极驱动信号输出电路14在所述第二上拉节点PU2的电位的控制下,控制所述第二栅极驱动信号输出端OP2与第二时钟信号端之间连通,以控制第二栅极驱动信号输出端OP2输出有效电压;
在第二输出复位时间段,上拉控制节点控制电路11维持所述上拉控制节点PUCN的电位为有效电压,第二时钟信号端输入无效电压,第二栅极驱动信号输出电路14在所述第二上拉节点PU2的电位的控制下,控制所述第二栅极驱动信号输出端OP2与第二时钟信号端之间连通,以控制第二栅极驱动信号输出端OP2输出无效电压;
在第二下拉节点控制时间段,第四时钟信号端输入有效电压,下拉节点 控制电路15在CK4输入的第四时钟信号的控制下,控制下拉节点PD的电压为有效电压,第二栅极驱动信号输出电路14在所述下拉节点PD的电位的控制下,控制对所述第二栅极驱动信号输出端OP2输出的第二栅极驱动信号进行复位;
在第二输出截止保持时间段,下拉节点控制电路15维持所述下拉节点PD的电压为有效电压,第二栅极驱动信号输出电路14在所述下拉节点PD的电位的控制下,控制对所述第二栅极驱动信号输出端OP2输出的第二栅极驱动信号进行复位。
可选的,所述起始端可以包括奇数行起始端和偶数行起始端;
所述上拉控制节点控制电路配置为当所述奇数行起始端输入有效电压时,控制并维持所述上拉控制节点的电位为有效电压,并当所述偶数行起始端输入有效电压时,控制并维持所述上拉控制节点的电位为有效电压,当所述下拉节点的电位为有效电压时,控制所述上拉控制节点的电位为无效电压。
如图2所示,在图1所示的本公开的至少一实施例所述的栅极驱动单元的基础上,所述起始端包括奇数行起始端STV_ODD和偶数行起始端STV_EVEN;
所述上拉控制节点控制电路11分别与所述奇数行起始端STV_ODD和所述偶数行起始端STV_EVEN和上拉控制节点PUCN连接,用于当所述奇数行起始端STV_ODD输入有效电压时,控制并维持所述上拉控制节点PUCN的电位为有效电压,并当所述偶数行起始端STV_EVEN输入有效电压时,控制并维持所述上拉控制节点PUCN的电位为有效电压,当所述下拉节点PD的电位为有效电压时,控制所述上拉控制节点PUCN的电位为无效电压。
具体的,所述上拉控制节点控制电路可以包括:
第一晶体管,控制极与所述奇数行起始端连接,第一极与第一电压端连接,第二极与所述上拉控制节点连接;
第二晶体管,控制极与所述偶数行起始端连接,第一极与第一电压端连接,第二极与所述上拉控制节点连接;
上拉控制节点下拉晶体管,控制极与所述下拉节点连接,第一极与所述上拉控制节点连接,第二极与第二电压端连接;以及,
上拉控制节点维持电容,第一端与所述上拉控制节点连接,第二端与第三电压端连接。
在具体实施时,所述第一电压端可以为高电压端,所述第二电压端可以为低电压端,所述第三电压端可以为低电压端,但不以此为限。
如图3所示,在图2所示的本公开的至少一实施例所述的栅极驱动单元的基础上,所述上拉控制节点控制电路11包括:
第一晶体管T01,栅极与所述奇数行起始端STV_ODD连接,漏极与高电压端连接,源极与所述上拉控制节点PUCN连接;所述高电压端用于输入高电压VGH;
第二晶体管T02,栅极与所述偶数行起始端STV_EVEN连接,漏极与所述高电压端连接,源极与所述上拉控制节点PUCN连接;
上拉控制节点下拉晶体管T10,栅极与所述下拉节点PD连接,漏极与所述上拉控制节点PUCN连接,源极与低电压端连接;以及,
上拉控制节点维持电容C1,第一端与所述上拉控制节点PUCN连接,第二端与所述低电压端连接;
所述低电压端用于输入低电压VGL。
在图3所示的本公开的至少一实施例中,各晶体管都为n型薄膜晶体管,但不以此为限。
如图4所示,在图1所示的本公开的至少一实施例所述的栅极驱动单元的基础上,所述起始端包括正向奇数行起始端STVF_ODD、反向奇数行起始端STVB_ODD、正向偶数行起始端STVF_EVEN和反向奇数行起始端STVB_EVEN;所述栅极驱动单元还可以包括正向扫描控制端CN和反向扫描控制端CNB;
所述上拉控制节点控制电路11分别与正向扫描控制端CN、正向奇数行起始端SVTF_ODD、上拉控制节点PUCN和正向偶数行起始端STVF_EVEN连接,配置为在正向扫描时,在所述正向扫描控制端CN输入的正向扫描控制信号的控制下,当所述正向奇数行起始端STVF_ODD输入有效电压时,控制所述上拉控制节点PUCN的电位为有效电压,并当所述正向偶数行起始端STVF_EVEN输入有效电压时,控制并维持所述上拉控制节点PUCN的电位 为有效电压;
所述上拉控制节点控制电路11还分别与反向扫描控制端CNB、反向奇数行起始端STVB_ODD和反向偶数行起始端STVB_EVEN连接,配置为在反向扫描时,在所述反向扫描控制端CNB输入的反向扫描控制信号的控制下,当所述反向奇数行起始端STVB_ODD输入有效电压时,控制所述上拉控制节点PUCN的电位为有效电压,并当所述反向偶数行起始端STVB_EVEN输入有效电压时,控制并维持所述上拉控制节点PUCN的电位为有效电压;
所述上拉控制节点控制电路11还与所述下拉节点PD连接,还配置为当所述下拉节点PD的电位为有效电压时,控制所述上拉控制节点PUCN的电位为无效电压。
可选的,所述上拉控制节点控制电路可以包括:
第一正向扫描控制晶体管,控制极与所述正向扫描控制端连接,第一极与所述正向奇数行起始端连接;
第二正向扫描控制晶体管,控制极与所述正向扫描控制端连接,第一极与所述正向偶数行起始端连接;
第一反向扫描控制晶体管,控制极与所述反向扫描控制端连接,第一极与第一上拉控制节点控制晶体管的控制极连接,第二极与所述反向奇数行起始端连接;
第二反向扫描控制晶体管,控制极与所述反向扫描控制端连接,第一极与第二上拉控制节点控制晶体管的控制极连接,第二极与所述反向偶数行起始端连接;
第一上拉控制节点控制晶体管,控制极与所述第一正向扫描控制晶体管的第二极连接,第一极与所述第一电压端连接,第二极与所述上拉控制节点连接;
第二上拉控制节点控制晶体管,控制极与所述第二正向扫描控制晶体管的第二极连接,第一极与所述第一电压端连接,第二极与所述上拉控制节点连接;
上拉控制节点下拉晶体管,控制极与所述下拉节点连接,第一极与所述上拉控制节点连接,第二极与第二电压端连接;以及,
上拉控制节点维持电容,第一端与所述上拉控制节点连接,第二端与第三电压端连接。
如图5所示,在图4所示的本公开的至少一实施例所述的栅极驱动单元的基础上,所述上拉控制节点控制电路11包括:
第一正向扫描控制晶体管T1,栅极与所述正向扫描控制端CN连接,漏极与所述正向奇数行起始端SVTF_ODD连接;
第二正向扫描控制晶体管T3,栅极与所述正向扫描控制端CN连接,漏极与所述正向偶数行起始端STVF_EVEN连接;
第一反向扫描控制晶体管T2,栅极与所述反向扫描控制端CNB连接,漏极与第一上拉控制节点控制晶体管T5的栅极连接,源极与所述反向奇数行起始端STVB_ODD连接;
第二反向扫描控制晶体管T4,栅极与所述反向扫描控制端CNB连接,漏极与第二上拉控制节点控制晶体管T6的栅极连接,源极与所述反向偶数行起始端STVB_EVEN连接;
第一上拉控制节点控制晶体管T5,栅极与所述第一正向扫描控制晶体管T3的源极连接,漏极与高电压端连接,源极与所述上拉控制节点PUCN连接;所述高电压端用于输入高电压VGH;
第二上拉控制节点控制晶体管T6,栅极与所述第二正向扫描控制晶体管T3的源极连接,漏极与所述高电压端连接,源极与所述上拉控制节点PUCN连接;
上拉控制节点下拉晶体管T10,栅极与所述下拉节点PD连接,漏极与所述上拉控制节点PUCN连接,第二极与低电压端连接;以及,
上拉控制节点维持电容C2,第一端与所述上拉控制节点PUCN连接,第二端与低电压端连接;所述低电压端用于输入低电压VGL。
在具体实施时,如图6所示,在图1所示的本公开的至少一实施例所述的栅极驱动单元的基础上,本公开的至少一实施例所述的栅极驱动单元还可以包括复位电路16;
所述复位电路16分别与空白区复位端Rst和下拉节点PD连接,配置为在空白区复位端Rst输入的空白区复位信号的控制下,控制所述下拉节点PD 的电位为有效电压。
在空白时间段,Rst输入有效电压,复位电路16在Rst输入的空白区复位信号的控制下,控制PD的电位为有效电压,以控制对PUCN的电位、OP1输出的第一栅极驱动信号和OP2输出的第二栅极驱动信号进行放噪。
可选的,所述上拉节点控制电路可以包括:
第一上拉节点控制晶体管,控制极与第一电压端连接,第一极与所述第一上拉节点连接,第二极与所述上拉控制节点连接;以及,
第二上拉节点控制晶体管,控制极与所述第一电压端连接,第一极与所述第二上拉节点连接,第二极与所述上拉控制节点连接。
具体的,所述下拉节点控制电路可以包括:
第一下拉节点控制晶体管,控制极和第一极都与所述第三时钟信号端连接,第二极与所述下拉节点连接;
第二下拉节点控制晶体管,控制极和第二极都与所述第四时钟信号端连接,第一极与所述下拉节点连接;
第三下拉节点控制晶体管,控制极与所述上拉控制节点连接,第一极与所述下拉节点连接,第二极与第二电压端连接;以及,
下拉节点维持电容,第一端与所述下拉节点连接,第二端与第四电压端连接。
可选的,所述第四电压端可以为低电压端,但不以此为限。
可选的,所述第一栅极驱动信号输出电路可以包括第一输出晶体管和第一输出下拉晶体管;
所述第一输出晶体管的控制极与所述第一上拉节点连接,所述第一输出晶体管的第一极与所述第一时钟信号端连接,所述第一输出晶体管的第二极与所述第一栅极驱动信号输出端连接;
所述第一输出下拉晶体管的控制极与所述下拉节点连接,所述第一输出下拉晶体管的第一极与所述第一栅极驱动信号输出端连接,所述第一输出下拉晶体管的第二极与第二电压端连接。
可选的,所述第二栅极驱动信号输出电路可以包括第二输出晶体管和第二输出下拉晶体管;
所述第二输出晶体管的控制极与所述第二上拉节点连接,所述第二输出晶体管的第一极与所述第二时钟信号端连接,所述第二输出晶体管的第二极与所述第二栅极驱动信号输出端连接;
所述第二输出下拉晶体管的控制极与所述下拉节点连接,所述第二输出下拉晶体管的第一极与所述第二栅极驱动信号输出端连接,所述第二输出下拉晶体管的第二极与第二电压端连接。
如图7所示,在图6所示的本公开的至少一实施例所述的栅极驱动单元的基础上,本公开的至少一实施例所述的栅极驱动单元还可以包括触控输出控制电路17;
所述触控输出控制电路17分别与触控输出控制端EN_T、第一栅极驱动信号输出端OP1和第二栅极驱动信号输出端OP2连接,配置为在触控输出控制端EN_T输入的触控输出控制信号的控制下,控制所述第一栅极驱动信号输出端OP1和所述第二栅极驱动信号输出端OP2都输出无效电压。
在具体实施时,本公开的至少一实施例所述的栅极驱动单元还可以包括触控输出控制电路17,在触控时间段,在触控输出控制端EN_T输入的触控输出控制信号的控制下,控制OP1和OP2都输出无效电压,以避免在触控时间段显示面板上的栅线打开而导致的误显示。
如图8所示,在图7所示的本公开的至少一实施例所述的栅极驱动单元的基础上,本公开的至少一实施例所述的栅极驱动单元还可以包括息屏控制电路18;
所述息屏控制电路18用于在息屏控制端EN输入的息屏控制信号的控制下,控制所述第一栅极驱动信号输出端OP1和所述第二栅极驱动信号输出端都OP2输出有效电压。
可选的,本公开的至少一实施例所述的栅极驱动单元还可以包括息屏控制电路18,在息屏时,所述息屏控制电路18在息屏控制信号的控制下,控制OP1和OP2都输出有效电压,以控制显示面板上的栅线都打开,以释放残留的电荷。
如图9所示,本公开的至少一所述的栅极驱动单元包括起始端、第一栅极驱动信号输出端OP1、第二栅极驱动信号输出端OP2、上拉控制节点控制 电路11、上拉节点控制电路12、第一栅极驱动信号输出电路13、第二栅极驱动信号输出电路14、下拉节点控制电路15、复位电路16、触控输出控制电路17和息屏控制电路18,其中,
所述起始端包括正向奇数行起始端STVF_ODD、反向奇数行起始端STVB_ODD、正向偶数行起始端STVF_EVEN和反向奇数行起始端STVB_EVEN;所述栅极驱动单元还包括正向扫描控制端CN和反向扫描控制端CNB;
所述上拉控制节点控制电路11包括:
第一正向扫描控制晶体管T1,栅极与所述正向扫描控制端CN连接,漏极与所述正向奇数行起始端SVTF_ODD连接;
第二正向扫描控制晶体管T3,栅极与所述正向扫描控制端CN连接,漏极与所述正向偶数行起始端STVF_EVEN连接;
第一反向扫描控制晶体管T2,栅极与所述反向扫描控制端CNB连接,漏极与第一上拉控制节点控制晶体管T5的栅极连接,源极与所述反向奇数行起始端STVB_ODD连接;
第二反向扫描控制晶体管T4,栅极与所述反向扫描控制端CNB连接,漏极与第二上拉控制节点控制晶体管T6的栅极连接,源极与所述反向偶数行起始端STVB_EVEN连接;
第一上拉控制节点控制晶体管T5,栅极与所述第一正向扫描控制晶体管T3的源极连接,漏极与高电压端连接,源极与所述上拉控制节点PUCN连接;所述高电压端用于输入高电压VGH;
第二上拉控制节点控制晶体管T6,栅极与所述第二正向扫描控制晶体管T3的源极连接,漏极与所述高电压端连接,源极与所述上拉控制节点PUCN连接;
上拉控制节点下拉晶体管T10,栅极与所述下拉节点PD连接,漏极与所述上拉控制节点PUCN连接,源极与低电压端连接;以及,
上拉控制节点维持电容C1,第一端与所述上拉控制节点PUCN连接,第二端与低电压端连接;所述低电压端用于输入低电压VGL;
所述上拉节点控制电路12包括:
第一上拉节点控制晶体管T11,栅极与高电压端连接,漏极与第一上拉节点PU1连接,源极与所述上拉控制节点PUCN连接;以及,
第二上拉节点控制晶体管T12,栅极与所述高电压端连接,漏极与所述第二上拉节点PU2连接,源极与所述上拉控制节点PUCN连接;
所述高电压端用于输入高电压VGH;
所述下拉节点控制电路15包括:
第一下拉节点控制晶体管T7,栅极和漏极都与所述第三时钟信号端连接,源极与下拉节点PD连接;所述第三时钟信号端CK3用于输入第三时钟信号;
第二下拉节点控制晶体管T8,栅极和源极都与所述第四时钟信号端连接,漏极与所述下拉节点PD连接;所述第四时钟信号端CK4用于输入第四时钟信号;
第三下拉节点控制晶体管T9,栅极与所述上拉控制节点PUCN连接,漏极与所述下拉节点PD连接,源极与所述低电压端连接;以及,
下拉节点维持电容C2,第一端与所述下拉节点PD连接,第二端与所述低电压端连接;
所述第一栅极驱动信号输出电路13包括第一输出晶体管T13和第一输出下拉晶体管T15;
所述第一输出晶体管T13的栅极与所述第一上拉节点PU1连接,所述第一输出晶体管T13的漏极与所述第一时钟信号端连接,所述第一输出晶体管T13的源极与所述第一栅极驱动信号输出端OP1连接;所述第一时钟信号端CK1用于输入第一时钟信号;
所述第一输出下拉晶体管T15的栅极与所述下拉节点PD连接,所述第一输出下拉晶体管T15的漏极与所述第一栅极驱动信号输出端OP1连接,所述第一输出下拉晶体管T15的源极与所述低电压端连接。
所述第二栅极驱动信号输出电路14包括第二输出晶体管T14和第二输出下拉晶体管T16;
所述第二输出晶体管T14的栅极与所述第二上拉节点PU2连接,所述第二输出晶体管T14的漏极与所述第二时钟信号端连接,所述第二输出晶体管T14的源极与所述第二栅极驱动信号输出端OP2连接;所述第二时钟信号端 CK2用于输入第二时钟信号;
所述第二输出下拉晶体管T16的栅极与所述下拉节点PD连接,所述第二输出下拉晶体管T16的漏极与所述第二栅极驱动信号输出端OP2连接,所述第二输出下拉晶体管T16的源极与所述低电压端连接;
所述复位电路16包括复位晶体管T17;
所述复位晶体管T17的栅极与空白区复位端Rst连接,所述复位晶体管T17的源极与所述下拉节点PD连接,所述复位晶体管T17的漏极与低电压端连接;
所述触控输出控制电路17包括第一触控输出控制晶体管T18A和第二触控输出控制晶体管T18B;
所述第一触控输出控制晶体管T18A的栅极与触控输出控制端EN_T连接,所述第一触控输出控制晶体管T18A的源极与所述第一栅极驱动信号输出端OP1连接,所述第一触控输出控制晶体管T18A的漏极与低电压端连接;
所述第二触控输出控制晶体管T18B的栅极与所述触控输出控制端EN_T连接,所述第二触控输出控制晶体管T18B的源极与所述第二栅极驱动信号输出端OP2连接,所述第二触控输出控制晶体管T18B的漏极与所述低电压端连接;
所述息屏控制电路18包括第一息屏控制晶体管T19A和第二息屏控制晶体管T19B;
所述第一息屏控制晶体管T19A的栅极和所述第一息屏控制晶体管T19A的源极都与所述息屏控制端EN连接,所述第一息屏控制晶体管T19A的漏极与所述第一栅极驱动信号输出端OP1连接;
所述第二息屏控制晶体管T19B的栅极和所述第二息屏控制晶体管T19B的源极都与所述息屏控制端EN连接,所述第二息屏控制晶体管T19B的漏极与所述第二栅极驱动信号输出端OP2连接。
在图9所示的本公开的至少一实施例中,所有的晶体管都为n型薄膜晶体管,但不以此为限。如图9所示的栅极驱动单元的具体实施例在工作时,有效电压可以为高电压,无效电压可以为低电压,但不以此为限。
在图9所示的本公开的至少一实施例中,所述第一电压端为高电压端, 所述第二电压端、所述第三电压端和所述第四电压端都为低电压端,但不以此为限。
如图9所示的本公开的至少一实施例在工作时,在触控时间段,EN_T输出高电平,T18A和T18B都打开,以控制OP1和OP2都输出低电平,以控制显示面板上所有的像素单元都不工作;
在异常掉电息屏时,EN输入高电平,使得OP1和OP2都输出高电平,以控制所有栅线打开,以释放像素单元中残留的电荷。
如图9所示的本公开的至少一实施例在工作时,在正向扫描时,CN输入高电平,CNB输入低电平,STVB_ODD和STVB_EVEN都输入低电平,与常规的栅极驱动单元的区别在于,如图10所示,本公开的至少一实施例将一帧画面显示时间TZ划分为第一显示周期Td1和第二显示周期Td2,在第一显示周期Td1内的第一输出时间段,OP1输出高电压,在第二显示周期Td2内的第二输出时间段,OP2输出高电压;
第一显示周期Td1包括以此设置的第一输入时间段t11、第一输出时间段t12、第一输出复位时间段t13、第一下拉节点控制时间段t14和第一输出截止保持时间段t15;第二显示周期Td2包括依次设置的第二输入时间段t21、第二输出时间段t22、第二输出复位时间段t23、第二下拉节点控制时间段t24和第二输出截止保持时间段t25;在所述第一显示周期Td1之前设置有空白时间段TB;
在空白时间段TB,Rst输入高电平,T17打开,以将PD的电位拉高;
在第一显示周期Td1,
在第一输入时间段t11,STVF_ODD输入高电平,STV_EVEN输入低电平,T1打开,T5的栅极接入高电平,T5打开,以将PUCN的电位拉高为VGH;T11和T12打开,PU1的电位和PU2的电位都变为高电平,T13和T14都打开,CK1输入低电平,CK2输入低电平,OP1输出低电平,OP2输出低电平;T9打开,以拉低PD的电位为VGL;C1保持PUCN的电位为高电平;
在第一输出时间段t12,STVF_ODD输入低电平,STV_EVEN输入低电平,CK1输入高电平,由于自举作用PU1的电位进一步升高,T13打开,OP1输出高电平,PUCN的电位和PU2的电位保持为t11时刻的高电平,T9打开, PD的电位维持为VGL;并CK2输入低电平,OP2输出低电平;
在第一输出复位时间段t13,CK1输入低电平,由于自举作用PU1的电位恢复到t11时刻的高电平,T13依然打开,OP1输出低电平;并CK2输入低电平,OP2输出低电平;
在第一下拉节点控制时间段t14,CK3输入高电平,T7打开,以将PD的电位拉高,T10、T15和T16打开,以将PUCN的电位拉低为VGL,并控制OP1和OP2都输出低电平;
在第一输出截止保持时间段t15,CK3间隔输入低电平、高电平,当CK3输入高电平时,控制T7打开,以维持PD的电位为高电平,维持PUCN的电位为VGL,控制OP1和OP2都输出低电平;
在第二显示周期Td2,
在第二输入时间段t21,STVF_ODD输入低电平,STV_EVEN输入高电平,T3打开,T6的栅极接入高电平,T6打开,以将PUCN的电位拉高为VGH;T11和T12打开,PU1的电位和PU2的电位都变为高电平,T13和T14都打开,CK1输入低电平,CK2输入低电平,OP1输出低电平,OP2输出低电平;T9打开,以拉低PD的电位为VGL;C1保持PUCN的电位为高电平;
在第二输出时间段t22,STVF_ODD输入低电平,STV_EVEN输入低电平,CK2输入高电平,由于自举作用PU2的电位进一步升高,T14打开,OP2输出高电平,PUCN的电位和PU1的电位保持为t11时刻的高电平,T9打开,PD的电位维持为VGL;并CK1输入低电平,OP1输出低电平;
在第二输出复位时间段t23,CK2输入低电平,由于自举作用PU2的电位恢复到t21时刻的高电平,T14依然打开,OP2输出低电平;并CK1输入低电平,OP1输出低电平;
在第二下拉节点控制时间段t24,CK4输入高电平,T8打开,以将PD的电位拉高,T10、T15和T16打开,以将PUCN的电位拉低为VGL,并控制OP1和OP2都输出低电平;
在第二输出截止保持时间段t25,CK4间隔输入低电平、高电平,当CK4输入高电平时,控制T8打开,以维持PD的电位为高电平,维持PUCN的电位为VGL,控制OP1和OP2都输出低电平。
本公开的至少一实施例所述的栅极驱动方法用于驱动上述的栅极驱动单元,一帧画面显示时间包括第一显示周期和第二显示周期,所述第一显示周期包括依次设置的第一输入时间段和第一输出时间段;所述第二显示周期包括依次设置的第二输入时间段和第二输出时间段;所述栅极驱动方法包括:
在第一输入时间段和第二输入时间段,上拉控制节点控制电路在起始信号的控制下,控制上拉控制节点的电位为有效电压,上拉节点控制电路根据所述上拉控制节点的电位,控制第一上拉节点的电位和第二上拉节点的电位为有效电压;
在第一输出时间段,上拉控制节点控制电路维持所述上拉控制节点的电位为有效电压,第一时钟信号端输入有效电压,第一栅极驱动信号输出电路在所述第一上拉节点的电位的控制下,控制所述第一栅极驱动信号输出端与第一时钟信号端之间连通,以控制第一栅极驱动信号输出端输出有效电压;
在第二输出时间段,上拉控制节点控制电路维持所述上拉控制节点的电位为有效电压,第二时钟信号端输入有效电压,第二栅极驱动信号输出电路在所述第二上拉节点的电位的控制下,控制所述第二栅极驱动信号输出端与第二时钟信号端之间连通,以控制第二栅极驱动信号输出端输出有效电压。
本公开的至少一实施例所述的栅极驱动方法将一帧画面显示时间划分为第一显示周期和第二显示周期,在第一显示周期包括的第一输出时间段,所述栅极驱动单元包括的第一栅极驱动信号输出电路控制通过所述第一栅极驱动信号输出端输出有效电压,在第二显示周期包括的第二输出时间段,所述栅极驱动单元包括的第二栅极驱动信号输出电路通过所述第二栅极驱动信号输出端输出有效电压。
本公开的至少一实施例所述的栅极驱动方法将一帧画面显示时间划分为两个显示周期,在一所述显示周期包括的输出时间段控制输出一个栅极驱动信号,本公开的至少一实施例所述的栅极驱动方法实现奇偶行交替输出,可降低刷新频率,然而时钟信号的脉冲宽度保证与高刷新频率时一致,可以实现低功耗的同时,降低Flicker(闪烁)增大的风险。并且,本公开的至少一实施例所述的栅极驱动方法能够提供两级栅极驱动信号输出,能够增大显示面板边框的布线空间。
可选的,所述第一显示周期还可以包括设置于所述第一输出时间段之后的第一输出复位时间段和第一下拉节点控制时间段,所述第二显示周期还可以包括设置于所述第二输出时间段之后的第二输出复位时间段和第二下拉节点控制时间段,所述栅极驱动方法还可以包括:
在第一输出复位时间段,上拉控制节点控制电路维持所述上拉控制节点的电位为有效电压,第一时钟信号端输入无效电压,第一栅极驱动信号输出电路在所述第一上拉节点的电位的控制下,控制所述第一栅极驱动信号输出端与第一时钟信号端之间连通,以控制第一栅极驱动信号输出端输出无效电压;
在第一下拉节点控制时间段,第三时钟信号端输入有效电压,下拉节点控制电路在第三时钟信号的控制下,控制下拉节点的电压为有效电压,第一栅极驱动信号输出电路在所述下拉节点的电位的控制下,控制对所述第一栅极驱动信号输出端输出的第一栅极驱动信号进行复位;
在第二输出复位时间段,上拉控制节点控制电路维持所述上拉控制节点的电位为有效电压,第二时钟信号端输入无效电压,第二栅极驱动信号输出电路在所述第二上拉节点的电位的控制下,控制所述第二栅极驱动信号输出端与第二时钟信号端之间连通,以控制第二栅极驱动信号输出端输出无效电压;
在第二下拉节点控制时间段,第四时钟信号端输入有效电压,下拉节点控制电路在第四时钟信号的控制下,控制下拉节点的电压为有效电压,第二栅极驱动信号输出电路在所述下拉节点的电位的控制下,控制对所述第二栅极驱动信号输出端输出的第二栅极驱动信号进行复位。
可选的,在第一输出复位时间段,上拉控制节点控制电路维持所述上拉控制节点的电位为有效电压,第一栅极驱动信号输出电路控制第一栅极驱动信号输出端输出无效电压;在第一下拉节点控制时间段,下拉节点控制电路控制下拉节点的电压为有效电压,第一栅极驱动信号输出电路控制对所述第一栅极驱动信号输出端输出的第一栅极驱动信号进行复位;在第二输出复位时间段,上拉控制节点控制电路维持所述上拉控制节点的电位为有效电压,第二栅极驱动信号输出电路控制第二栅极驱动信号输出端输出无效电压;在 第二下拉节点控制时间段,下拉节点控制电路控制下拉节点的电压为有效电压,第二栅极驱动信号输出电路控制对所述第二栅极驱动信号输出端输出的第二栅极驱动信号进行复位。
可选的,所述第一显示周期还包括设置于所述第一下拉节点控制时间段之后的第一输出截止保持时间段,所述第二显示周期还包括设置于所述第二下拉节点控制时间段之后的第二输出截止保持时间段;所述栅极驱动方法还包括:
在第一输出截止保持时间段,下拉节点控制电路维持所述下拉节点的电压为有效电压,第一栅极驱动信号输出电路在所述下拉节点的电位的控制下,控制对所述第一栅极驱动信号输出端输出的第一栅极驱动信号进行复位;
在第二输出截止保持时间段,下拉节点控制电路维持所述下拉节点的电压为有效电压,第二栅极驱动信号输出电路在所述下拉节点的电位的控制下,控制对所述第二栅极驱动信号输出端输出的第二栅极驱动信号进行复位。
在具体实施时,在一输出截止保持时间段,下拉节点控制电路维持所述下拉节点的电压为有效电压,第一栅极驱动信号输出电路控制对第一栅极驱动信号进行复位;在第二输出截止保持时间段,下拉节点控制电路维持所述下拉节点的电压为有效电压,第二栅极驱动信号输出电路对第二栅极驱动信号进行复位。
可选的,本公开的至少一实施例所述的栅极驱动方法还可以包括:
在第一输入时间段和第二输入时间段,第一时钟信号端和第二时钟信号端输入无效电压,第一栅极驱动信号输出电路在所述第一上拉节点的电位的控制下,控制所述第一栅极驱动信号输出端与第一时钟信号端之间连通,以控制第一栅极驱动信号输出端输出无效电压,第二栅极驱动信号输出电路在所述第二上拉节点的电位的控制下,控制所述第二栅极驱动信号输出端与第二时钟信号端之间连通,以控制第二栅极驱动信号输出端输出无效电压;
在第一输出时间段,第二时钟信号端输入有效电压,第二栅极驱动信号输出电路在所述第二上拉节点的电位的控制下,控制所述第二栅极驱动信号输出端与第二时钟信号端之间连通,以控制第二栅极驱动信号输出端输出无效电压;
在第二输出时间段,第一时钟信号端输入有效电压,第一栅极驱动信号输出电路在所述第一上拉节点的电位的控制下,控制所述第一栅极驱动信号输出端与第一时钟信号端之间连通,以控制第一栅极驱动信号输出端输出无效电压。
可选的,在第一输入时间段和第二输入时间段,第一栅极驱动信号输出电路控制第一栅极驱动信号输出端输出无效电压,第二栅极驱动信号输出电路控制第二栅极驱动信号输出端输出无效电压;在第一输出时间段,第二栅极驱动信号输出电路控制第二栅极驱动信号输出端输出无效电压;在第二输出时间段,第一栅极驱动信号输出电路控制第一栅极驱动信号输出端输出无效电压。
可选的,所述栅极驱动单元还可以包括复位电路,本公开的至少一实施例所述的栅极驱动方法还包括:
在两显示周期之间设置的空白时间段,所述复位电路在空白区复位端输入的空白区复位信号的控制下,控制下拉节点的电位为有效电压。
在具体实施时,在空白时间段,复位电路在空白区复位端输入的空白区复位信号的控制下,控制下拉节点的电位为有效电压,以对第一栅极驱动信号和第二栅极驱动信号进行放噪。
本公开的至少一实施例所述的栅极驱动电路包括多级上述的栅极驱动单元。
可选的,所述起始端可以包括奇数行起始端和偶数行起始端;
除了第一级栅极驱动单元,每一级栅极驱动单元的奇数行起始端与相邻上一级栅极驱动单元的第一栅极驱动信号输出端连接,每一级栅极驱动单元的偶数行起始端与相邻上一级栅极驱动单元的第二栅极驱动信号输出端连接;
第一级栅极驱动单元的奇数行起始端与第一起始信号输入端连接,第一级栅极驱动单元的偶数行起始端与第二起始信号输入端连接。
根据另一种具体实施方式,所述起始端可以包括正向奇数行起始端、反向奇数行起始端、正向偶数行起始端和反向奇数行起始端;所述栅极驱动单元还可以包括正向扫描控制端和反向扫描控制端;
除了第一级栅极驱动单元,每一级栅极驱动单元的正向奇数行起始端与 相邻上一级栅极驱动单元的第一栅极驱动信号输出端连接,每一级栅极驱动单元的正向偶数行起始端与相邻上一级栅极驱动单元的第二栅极驱动信号输出端连接;
第一级栅极驱动单元的正向奇数行起始端与第一正向起始信号输入端连接,第一级栅极驱动单元的正向偶数行起始端与第二正向起始信号输入端连接;
除了最后一级栅极驱动单元,每一级栅极驱动单元的反向奇数行起始端与相邻下一级栅极驱动单元的第一栅极驱动信号输出端连接,每一级栅极驱动单元的反向偶数行起始端与相邻下一级栅极驱动单元的第二栅极驱动信号输出端连接;
最后一级栅极驱动单元的反向奇数行起始端与第一反向起始信号输入端连接,最后一级栅极驱动单元的反向偶数行起始端与第二反向起始信号输入端连接。
可选的,第2n-1级栅极驱动单元的第一时钟信号端与第一时钟信号输入端连接,第2n-1级栅极驱动单元的第二时钟信号端与第二时钟信号输入端连接,第2n-1级栅极驱动单元的第一时钟信号端与第五时钟信号输入端连接,第2n-1级栅极驱动单元的第二时钟信号端与第六时钟信号输入端连接;
第2n级栅极驱动单元的第一时钟信号端与第三时钟信号输入端连接,第2n级栅极驱动单元的第二时钟信号端与第四时钟信号输入端连接,第2n级栅极驱动单元的第一时钟信号端与第七时钟信号输入端连接,第2n级栅极驱动单元的第二时钟信号端与第八时钟信号输入端连接;
n为正整数。
如图11所示,本公开的至少一实施例所述的栅极驱动电路包括多级上述的栅极驱动单元;
所述栅极驱动单元中的起始端包括正向奇数行起始端STVF_ODD、反向奇数行起始端STVB_ODD、正向偶数行起始端STVF_EVEN和反向奇数行起始端STVB_ODD;
奇数级栅极驱动单元的OP1与相邻下一级栅极驱动单元(偶数级栅极驱动单元)的正向偶数行起始端STVF_EVEN连接,奇数级栅极驱动单元的OP2 与相邻下一级栅极驱动单元(偶数级栅极驱动单元)的正向奇数行起始端STVF_ODD连接;偶数级栅极驱动单元的OP2与相邻上一级栅极驱动单元(奇数级栅极驱动单元)的反向偶数行起始端STVB_EVEN连接,偶数级栅极驱动单元的OP1与相邻上一级栅极驱动单元(奇数级栅极驱动单元)的反向奇数行起始端STVB_ODD连接;
偶数级栅极驱动单元的OP1与相邻下一级栅极驱动单元(奇数级栅极驱动单元)的正向偶数行起始端STVF_EVEN连接,偶数级栅极驱动单元的OP2与相邻下一级栅极驱动单元(奇数级栅极驱动单元)的正向奇数行起始端STVF_ODD连接;奇数级栅极驱动单元的OP2与相邻上一级栅极驱动单元(偶数级栅极驱动单元)的反向偶数行起始端STVB_EVEN连接,奇数级栅极驱动单元的OP1与相邻上一级栅极驱动单元(偶数级栅极驱动单元)的反向奇数行起始端STVB_ODD连接;
并且,奇数级栅极驱动单元的第一时钟信号端CK1与第一输入时钟信号端CLK1连接,奇数级栅极驱动单元的第二时钟信号端CK2与第二输入时钟信号端CLK2连接,奇数级栅极驱动单元的第三时钟信号端CK3与第五输入时钟信号端CLK5连接,奇数级栅极驱动单元的第四时钟信号端CK4与第六输入时钟信号端CLK6连接;偶数级栅极驱动单元的第一时钟信号端CK1与第三输入时钟信号端CLK3连接,偶数级栅极驱动单元的第二时钟信号端CK2与第四输入时钟信号端CLK4连接,偶数级栅极驱动单元的第三时钟信号端CK3与第七输入时钟信号端CLK7连接,偶数级栅极驱动单元的第四时钟信号端CK4与第八输入时钟信号端CLK8连接。
在图11中,标号为STV_O的为奇数行起始信号,标号为STV_E为偶数行起始信号。
在图11中,示意性的示出四级栅极驱动单元,其中,标号为S1的为第一级栅极驱动单元,标号为S2的为第二级栅极驱动单元,标号为S11的为第十一级栅极驱动单元,标号为S12的为第十二级栅极驱动单元;
并在图11中,标号为Op1的为S1的第一栅极驱动信号输出端,标号为Op2的为S1的第二栅极驱动信号输出端,标号为Op3的为S2的第一栅极驱动信号输出端,标号为Op4的为S2的第二栅极驱动信号输出端;标号为Op21 的为S11的第一栅极驱动信号输出端,标号为Op22的为S11的第二栅极驱动信号输出端,标号为Op23的为S12的第一栅极驱动信号输出端,标号为Op24的为S12的第二栅极驱动信号输出端;
Op1与第一行栅线连接,Op2与第二行栅线连接,Op3与第三行栅线连接,Op4与第四行栅线连接,Op21与第二十一行栅线连接,Op22与第二十二行栅线连接,Op23与第二十三行栅线连接,Op24与第二十四行栅线连接。
如图12所示,如图11所示的本公开的至少一实施例所述的栅极驱动电路在进行正向扫描时,将第一帧画面显示时间TZ1划分为第一显示周期Td1和第二显示周期Td2,将第二帧画面显示时间TZ2划分为第三显示周期Td3和第四显示周期Td4;
在第一显示周期Td1和第三显示周期Td3,CLK1提供的第一输入时钟信号、CLK3提供的第三输入时钟信号、CLK5提供的第五输入时钟信号和CLK7提供的第七输入时钟信号为时钟信号,该时钟信号的周期为T,第三输入时钟信号比第一输入时钟信号延迟T/4,第五输入时钟信号比第三输入时钟信号延迟T/4,第七输入时钟信号比第五输入时钟信号延迟T/4;
在第二显示周期Td2和第四显示周期Td4,CLK1提供的第一输入时钟信号、CLK3提供的第三输入时钟信号、CLK5提供的第五输入时钟信号和CLK7提供的第七输入时钟信号都为低电平;
在第一显示周期Td1和第三显示周期Td3,CLK2提供的第二输入时钟信号、CLK4提供的第四输入时钟信号、CLK6提供的第六输入时钟信号和CLK8提供的第八输入时钟信号都为低电平;
在第二显示周期Td2和第四显示周期Td4,CLK2提供的第二输入时钟信号、CLK4提供的第四输入时钟信号、CLK6提供的第六输入时钟信号和CLK8提供的第八输入时钟信号,该时钟信号的周期为T,第四输入时钟信号比第二输入时钟信号延迟T/4,第六输入时钟信号比第四输入时钟信号延迟T/4,第八输入时钟信号比第六输入时钟信号延迟T/4;
并如图12所示,如图11所示的本公开的至少一实施例所述的栅极驱动电路在进行正向扫描时,
在第一显示周期Td1和第三显示周期Td3,奇数级栅极驱动信号输出端 从上至下逐级输出栅极驱动信号,偶数级栅极驱动信号输出端输出低电平;也即,在Td1和Td3,Op1、Op3、…、Op21、Op23依次输出高电平,Op2、Op4、…、Op22、Op24都输出低电平;
在第二显示周期Td2和第四显示周期Td4,偶数级栅极驱动信号输出端从上至下逐级输出栅极驱动信号,奇数级栅极驱动信号输出端输出低电平;也即,在Td1和Td3,Op2、Op4、…、Op22、Op24依次输出高电平,Op1、Op3、…、Op21、Op23都输出低电平。
如图11所示的本公开的至少一实施例所述的栅极驱动电路在进行正向扫描时,在第一显示周期Td1和第三显示周期Td3,各级栅极驱动单元从上至下逐级通过其第一栅极驱动信号输出端输出相应的栅极驱动信号;在第二显示周期Td2和第四显示周期Td4,各级栅极驱动单元从上至下逐级通过其第二栅极驱动信号输出端输出相应的栅极驱动信号。
如图12所示,本公开的至少一实施例将刷新频率由60HZ降低到30HZ,可以明显降低显示面板的功耗,本公开的至少一实施例实现奇偶交替输出,CLK的脉冲宽度保证为与刷新频率为60HZ时相同,前半帧画面显示时间奇数行/偶数行GOA驱动画面,后半帧画面显示时间偶数行/奇数行GOA驱动画面,可以在实现低功耗。
在具体实施时,降低刷新频率即可降低显示面板的功耗,然而如果在降低刷新频率的前提下还是采用现有的在一帧画面显示时间从上至下依次扫描所有栅线的栅极驱动方案,则会由于一帧画面显示时间的增长,而导致在扫描至显示面板下方的栅线时,显示面板上方的栅线驱动的像素电路的亮度不能维持,从而导致闪烁增大;而本公开的至少一实施例将一帧画面显示时间分为两个显示周期,在一个显示周期内依次扫描偶数行栅线,在另一个显示周期内依次扫描奇数行栅线,由于显示周期持续的时间仅为一帧画面显示时间的一半,在扫描完偶数行栅线后,在另一显示周期继续从上至下依次扫描奇数行栅线,使得与奇数行栅线连接的多行像素电路依次发光,从而能够降低闪烁。
如图13所示,如图11所示的本公开的至少一实施例所述的栅极驱动电路在进行正向扫描时,将第一帧画面显示时间TZ1划分为第一显示周期Td1 和第二显示周期Td2,将第二帧画面显示时间TZ2划分为第三显示周期Td3和第四显示周期Td4;
在第一显示周期Td1和第三显示周期Td3,CLK1提供的第一输入时钟信号、CLK3提供的第三输入时钟信号、CLK5提供的第五输入时钟信号和CLK7提供的第七输入时钟信号为时钟信号,该时钟信号的周期为T,第三输入时钟信号比第一输入时钟信号延迟T/4,第五输入时钟信号比第三输入时钟信号延迟T/4,第七输入时钟信号比第五输入时钟信号延迟T/4;
在第二显示周期Td2和第四显示周期Td4,CLK1提供的第一输入时钟信号、CLK3提供的第三输入时钟信号、CLK5提供的第五输入时钟信号和CLK7提供的第七输入时钟信号都为低电平;
在第一显示周期Td1和第三显示周期Td3,CLK2提供的第二输入时钟信号、CLK4提供的第四输入时钟信号、CLK6提供的第六输入时钟信号和CLK8提供的第八输入时钟信号都为低电平;
在第二显示周期Td2和第四显示周期Td4,CLK2提供的第二输入时钟信号、CLK4提供的第四输入时钟信号、CLK6提供的第六输入时钟信号和CLK8提供的第八输入时钟信号,该时钟信号的周期为T,第四输入时钟信号比第二输入时钟信号延迟T/4,第六输入时钟信号比第四输入时钟信号延迟T/4,第八输入时钟信号比第六输入时钟信号延迟T/4;
并如图13所示,如图11所示的本公开的至少一实施例所述的栅极驱动电路的在进行反向扫描时,
在第一显示周期Td1和第三显示周期Td3,奇数级栅极驱动信号输出端从下至上逐级输出栅极驱动信号,偶数级栅极驱动信号输出端输出低电平;也即,在Td1和Td3,Op23、Op21、…、Op3、Op1依次输出高电平,Op24、Op22、…、Op4、Op2都输出低电平;
在第二显示周期Td2和第四显示周期Td4,偶数级栅极驱动信号输出端从下至上逐级输出栅极驱动信号,奇数级栅极驱动信号输出端输出低电平;也即,在Td1和Td3,Op2、Op4、…、Op22、Op24依次输出高电平,Op1、Op3、…、Op21、Op23都输出低电平。
如图11所示的本公开的至少一实施例所述的栅极驱动电路在进行反向 扫描时,在第一显示周期Td1和第三显示周期Td3,各级栅极驱动单元从下至上逐级通过其第一栅极驱动信号输出端输出相应的栅极驱动信号;在第二显示周期Td2和第四显示周期Td4,各级栅极驱动单元从下至上逐级通过其第二栅极驱动信号输出端输出相应的栅极驱动信号。
本公开的至少一实施例所述的栅极驱动方法,应用于上述的栅极驱动电路,一帧画面显示时间包括第一显示周期和第二显示周期;所述栅极驱动方法包括:
在第一显示周期,所述栅极驱动电路包括的各级栅极驱动单元逐级通过其第一栅极驱动信号输出端输出有效电压;
在第二显示周期,所述栅极驱动电路包括的各级栅极驱动单元逐级通过其第二栅极驱动信号输出端输出有效电压。
本公开的至少一实施例所述的栅极驱动方法将一帧画面显示时间划分为第一显示周期和第二显示周期,在第一显示周期,所述栅极驱动电路包括的各级栅极驱动单元逐级通过其第一栅极驱动信号输出端输出有效电压,在第二显示周期,所述栅极驱动电路包括的各级栅极驱动单元逐级通过其第二栅极驱动信号输出端输出有效电压。
本公开的至少一实施例所述的栅极驱动方法实现奇偶行交替输出,可降低刷新频率,然而时钟信号的脉冲宽度保证与高刷新频率时一致,可以实现低功耗的同时,降低Flicker(闪烁)增大的风险。并且,本公开的至少一实施例所述的栅极驱动方法能够提供两级栅极驱动信号输出,能够增大显示面板边框的布线空间。
可选的,第一显示周期可以包括依次设置的M个显示时间段,第二显示周期包括可以依次设置的M个显示时间段,M为所述栅极驱动电路包括的栅极驱动单元的总级数;所述栅极驱动方法包括:在正向扫描时,
在所述第一显示周期中的第m个显示时间段,所述栅极驱动电路包括的第m级栅极驱动单元通过其第一栅极驱动信号输出端输出有效电压;
在所述第二显示周期中的第m个显示时间段,所述栅极驱动电路包括的第m级栅极驱动单元通过其第二栅极驱动信号输出端输出有效电压;
M为大于1的整数,m为小于或等于M的正整数。
可选的,第一显示周期可以包括依次设置的M个显示时间段,第二显示周期可以包括依次设置的M个显示时间段,M为所述栅极驱动电路包括的栅极驱动单元的总级数;所述栅极驱动方法包括:在反向扫描时,
在所述第一显示周期中的第m个显示时间段,所述栅极驱动电路包括的第M-m+1级栅极驱动单元通过其第一栅极驱动信号输出端输出有效电压;
在所述第二显示周期中的第m个显示时间段,所述栅极驱动电路包括的第M-m+1级栅极驱动单元通过其第二栅极驱动信号输出端输出有效电压;
M为大于1的整数,m为小于或等于M的正整数。
本公开的至少一实施例所述的显示面板,包括显示基板,所述显示面板还包括设置于所述显示基板上的2M行栅线和上述的栅极驱动电路;M为所述栅极驱动电路包括的栅极驱动单元的总级数;
所述栅极驱动电路的第m级栅极驱动单元的第一栅极驱动信号输出端与第2m-1行栅线连接;
所述栅极驱动电路的第m级栅极驱动单元的第二栅极驱动信号输出端与第2m行栅线连接;
M为大于1的整数,m为小于或等于M的正整数。
可选的,所述显示面板可以包括一个所述栅极驱动电路,所述栅极驱动电路包括的第m级栅极驱动单元的第一栅极驱动信号输出端与第2m-1行栅线连接,所述栅极驱动电路的第m级栅极驱动单元的第二栅极驱动信号输出端与第2m行栅线连接,以通过该第一栅极驱动信号输出端为奇数行栅线提供栅极驱动信号,通过该第二栅极驱动信号输出端为偶数行栅线提供栅极驱动信号。
本公开的至少一实施例所述的显示面板,包括显示基板,所述显示面板还包括设置于所述显示基板上的2M行栅线和两个上述的栅极驱动电路;M为所述栅极驱动电路包括的栅极驱动单元的总级数;
第一个所述栅极驱动电路的第m级栅极驱动单元的第一栅极驱动信号输出端与第2m-1行栅线的左端连接;
第一个所述栅极驱动电路的第m级栅极驱动单元的第二栅极驱动信号输出端与第2m行栅线的左端连接;
第二个所述栅极驱动电路的第m级栅极驱动单元的第一栅极驱动信号输出端与第2m-1行栅线的右端连接;
第二个所述栅极驱动电路的第m级栅极驱动单元的第二栅极驱动信号输出端与第2m行栅线的右端连接;
M为大于1的整数,m为小于或等于M的正整数。
可选的,所述显示面板可以包括两个所述栅极驱动电路,第一个所述栅极驱动电路包括的第m级栅极驱动单元的第一栅极驱动信号输出端与第2m-1行栅线的左端连接,第一个所述栅极驱动电路的第m级栅极驱动单元的第二栅极驱动信号输出端与第2m行栅线的左端连接,以通过该第一栅极驱动信号输出端为奇数行栅线的左端提供栅极驱动信号,通过该第二栅极驱动信号输出端为偶数行栅线的左端提供栅极驱动信号;第二个所述栅极驱动电路包括的第m级栅极驱动单元的第一栅极驱动信号输出端与第2m-1行栅线的右端连接,第二个所述栅极驱动电路的第m级栅极驱动单元的第二栅极驱动信号输出端与第2m行栅线的右端连接,以通过该第一栅极驱动信号输出端为奇数行栅线的右端提供栅极驱动信号,通过该第二栅极驱动信号输出端为偶数行栅线的右端提供栅极驱动信号。
本公开的至少一实施例所述的显示面板通过采用两个所述栅极驱动电路,以分别为栅线的两端提供栅极驱动信号,可以适用于大尺寸高分辨率的显示面板;对于大尺寸高分辨率的显示面板,为了避免单边驱动造成的GOA(Gate On Array,设置于阵列基板上的栅极驱动电路)输出远端和近端负载不一致,进而引起远端与近端像素充电因能力不同造充电不足或者充电均一性的问题,以增强GOA输出稳定性,实现远端输出和近端输出一致。本公开的至少一实施例所述的显示面板采用双边驱动的方式,由于本公开的至少一实施例所述的显示面板中的栅极驱动电路包括的栅极驱动单元能够驱动两行栅线,因此能够节省空间,避免显示面板边框尺寸过大,实现在单级输出的布线空间完成双边输出。
目前显示面板的外形发展方向是异性化周边R圆弧角,中间U型槽并且要求窄边框设计,GOA采用单向扫描,在中间U型槽处无像素,所以左右两边的像素需要通过绕线实现栅极驱动,会占用较大的U型槽边框空间,且U 型槽越深要求的边框空间越大,很难满足窄边框的要求。基于此,本公开的至少一实施例在显示面板的两侧分别设置栅极驱动电路,左侧的栅极驱动电路与相应行栅线的左端连接,右侧的栅极驱动电路与相应行栅线的右侧连接,则能够不需要通过绕线实现栅极驱动,利于实现U型槽处的窄边框设计。
如图14所示,本公开的至少一实施例所述的显示面板包括多行栅线、第一栅极驱动电路和第二栅极驱动电路;
在图14中示出第一行栅线GL1、第二行栅线GL2、第三行栅线GL3、第四行栅线GL4、第二十一行栅线GL21、第二十二行栅线GL22、第二十三行栅线GL23和第二十四行栅线GL24;
所述第一栅极驱动电路包括的第一级栅极驱动单元Sz1的第一栅极驱动信号输出端与第一行栅线GL1的左端连接;所述第二栅极驱动电路包括的第一级栅极驱动单元Sr1的第一栅极驱动信号输出端与第一行栅线GL1的右端连接;
所述第一栅极驱动电路包括的第一级栅极驱动单元Sz1的第二栅极驱动信号输出端与第二行栅线GL2的左端连接;所述第二栅极驱动电路包括的第一级栅极驱动单元Sr1的第二栅极驱动信号输出端与第二行栅线GL2的右端连接;
所述第一栅极驱动电路包括的第二级栅极驱动单元Sz2的第一栅极驱动信号输出端与第三行栅线GL3的左端连接;所述第二栅极驱动电路包括的第二级栅极驱动单元Sr2的第一栅极驱动信号输出端与第三行栅线GL1的右端连接;
所述第一栅极驱动电路包括的第二级栅极驱动单元Sz2的第二栅极驱动信号输出端与第四行栅线GL4的左端连接;所述第二栅极驱动电路包括的第二级栅极驱动单元Sr2的第二栅极驱动信号输出端与第四行栅线GL4的右端连接;
所述第一栅极驱动电路包括的第十一级栅极驱动单元Sz11的第一栅极驱动信号输出端与第二十一行栅线GL21的左端连接;所述第二栅极驱动电路包括的第十一级栅极驱动单元Sr11的第一栅极驱动信号输出端与第二十一行栅线GL21的右端连接;
所述第一栅极驱动电路包括的第十一级栅极驱动单元Sz11的第二栅极驱动信号输出端与第二十二行栅线GL22的左端连接;所述第二栅极驱动电路包括的第十一级栅极驱动单元Sr11的第二栅极驱动信号输出端与第二十二行栅线GL22的右端连接;
所述第一栅极驱动电路包括的第十二级栅极驱动单元Sz12的第一栅极驱动信号输出端与第二十三行栅线GL23的左端连接;所述第二栅极驱动电路包括的第十二级栅极驱动单元Sr12的第一栅极驱动信号输出端与第二十三行栅线GL23的右端连接;
所述第一栅极驱动电路包括的第十二级栅极驱动单元Sz12的第二栅极驱动信号输出端与第二十四行栅线GL24的左端连接;所述第二栅极驱动电路包括的第十二级栅极驱动单元Sr12的第二栅极驱动信号输出端与第二十四行栅线GL24的右端连接。
在具体实施时,所述第一栅极驱动电路设置于所述显示基板的左侧,所述第二栅极驱动电路设置于所述显示基板的右侧。
在图14中,标号为CK1的为第一时钟信号端,标号为CK2的为第二时钟信号端,标号为CK3的为第三时钟信号端,标号为CK4的为第四时钟信号端,标号为CLK1的为第一输入时钟信号端,标号为CLK2的为第二输入时钟信号端,标号为CLK3的为第三输入时钟信号端,标号为CLK4的为第四输入时钟信号端,标号为CLK5的为第五输入时钟信号端,标号为CLK6的为第六输入时钟信号端,标号为CLK7的为第七输入时钟信号端,标号为CLK8的为第八输入时钟信号端,标号为STVF_ODD的为正向奇数行起始端,标号为STVB_ODD的为反向奇数行起始端、标号为STVF_EVEN的为正向偶数行起始端,标号为STVB_ODD的为反向奇数行起始端,标号为STV_O的为奇数行起始信号,标号为STV_E为偶数行起始信号,标号为OUT1的为第一栅极驱动信号输出端,标号为OUT2的为第二栅极驱动信号输出端。
本公开的至少一实施例所述的显示装置包括上述的显示面板。
本公开的至少一实施例所提供的显示装置可以为手机、平板电脑、电视机、显示器、笔记本电脑、数码相框、导航仪等任何具有显示功能的产品或部件。
本公开的至少一实施例所述的栅极驱动单元、方法、栅极驱动电路、显示面板和装置将一帧画面显示时间划分为两个显示周期,在一所述显示周期包括的输出时间段控制输出一个栅极驱动信号能够实现奇偶行交替输出,可降低刷新频率,然而时钟信号的脉冲宽度保证与高刷新频率时一致,可以实现低功耗的同时,降低Flicker(闪烁)增大的风险;并且,本公开的至少一实施例所述的栅极驱动单元能够提供两级栅极驱动信号输出,能够增大显示面板边框的布线空间。
以上所述仅是本公开的优选实施方式,应当指出,对于本技术领域的普通技术人员来说,在不脱离本公开原理的前提下,还可以做出若干改进和润饰,这些改进和润饰也应视本公开的保护范围。

Claims (27)

  1. 一种栅极驱动单元,包括起始端、第一栅极驱动信号输出端、第二栅极驱动信号输出端;
    上拉控制节点控制电路,配置为在所述起始端输入的起始信号的控制下,控制并维持上拉控制节点的电位为有效电压,并在下拉节点的电位的控制下,控制所述上拉控制节点的电位为无效电压;
    上拉节点控制电路,配置为根据所述上拉控制节点的电位,控制第一上拉节点的电位和第二上拉节点的电位;
    第一栅极驱动信号输出电路,配置为在所述第一上拉节点的电位的控制下,控制所述第一栅极驱动信号输出端与第一时钟信号端之间连通,在所述下拉节点的电位的控制下,控制对所述第一栅极驱动信号输出端输出的第一栅极驱动信号进行复位;
    第二栅极驱动信号输出电路,配置为在所述第二上拉节点的电位的控制下,控制所述第二栅极驱动信号输出端与第二时钟信号端之间连通,在所述下拉节点的电位的控制下,控制对所述第二栅极驱动信号输出端输出的第二栅极驱动信号进行复位;以及,
    下拉节点控制电路,配置为在第三时钟信号端输入的第三时钟信号和第四时钟信号端输入的第四时钟信号的控制下,控制并维持所述下拉节点的电位,在所述上拉控制节点的电位的控制下,对所述下拉节点的电位进行复位。
  2. 如权利要求1所述的栅极驱动单元,其中,所述起始端包括奇数行起始端和偶数行起始端;
    所述上拉控制节点控制电路配置为当所述奇数行起始端输入有效电压时,控制并维持所述上拉控制节点的电位为有效电压,并当所述偶数行起始端输入有效电压时,控制并维持所述上拉控制节点的电位为有效电压,当所述下拉节点的电位为有效电压时,控制所述上拉控制节点的电位为无效电压。
  3. 如权利要求2所述的栅极驱动单元,其中,所述上拉控制节点控制电路包括:
    第一晶体管,控制极与所述奇数行起始端连接,第一极与第一电压端连接,第二极与所述上拉控制节点连接;
    第二晶体管,控制极与所述偶数行起始端连接,第一极与第一电压端连接,第二极与所述上拉控制节点连接;
    上拉控制节点下拉晶体管,控制极与所述下拉节点连接,第一极与所述上拉控制节点连接,第二极与第二电压端连接;以及,
    上拉控制节点维持电容,第一端与所述上拉控制节点连接,第二端与第三电压端连接。
  4. 如权利要求1所述的栅极驱动单元,其中,所述起始端包括正向奇数行起始端、反向奇数行起始端、正向偶数行起始端和反向奇数行起始端;所述栅极驱动单元还包括正向扫描控制端和反向扫描控制端;
    所述上拉控制节点控制电路配置为在正向扫描时,在所述正向扫描控制端输入的正向扫描控制信号的控制下,当所述正向奇数行起始端输入有效电压时,控制所述上拉控制节点的电位为有效电压,并当所述正向偶数行起始端输入有效电压时,控制并维持所述上拉控制节点的电位为有效电压;
    所述上拉控制节点控制电路还配置为在反向扫描时,在所述反向扫描控制端输入的反向扫描控制信号的控制下,当所述反向奇数行起始端输入有效电压时,控制所述上拉控制节点的电位为有效电压,并当所述反向偶数行起始端输入有效电压时,控制并维持所述上拉控制节点的电位为有效电压;
    所述上拉控制节点控制电路还配置为当所述下拉节点的电位为有效电压时,控制所述上拉控制节点的电位为无效电压。
  5. 如权利要求4所述的栅极驱动单元,其中,所述上拉控制节点控制电路包括:
    第一正向扫描控制晶体管,控制极与所述正向扫描控制端连接,第一极与所述正向奇数行起始端连接;
    第二正向扫描控制晶体管,控制极与所述正向扫描控制端连接,第一极与所述正向偶数行起始端连接;
    第一反向扫描控制晶体管,控制极与所述反向扫描控制端连接,第一极与第一上拉控制节点控制晶体管的控制极连接,第二极与所述反向奇数行起始端连接;
    第二反向扫描控制晶体管,控制极与所述反向扫描控制端连接,第一极 与第二上拉控制节点控制晶体管的控制极连接,第二极与所述反向偶数行起始端连接;
    第一上拉控制节点控制晶体管,控制极与所述第一正向扫描控制晶体管的第二极连接,第一极与第一电压端连接,第二极与所述上拉控制节点连接;
    第二上拉控制节点控制晶体管,控制极与所述第二正向扫描控制晶体管的第二极连接,第一极与所述第一电压端连接,第二极与所述上拉控制节点连接;
    上拉控制节点下拉晶体管,控制极与所述下拉节点连接,第一极与所述上拉控制节点连接,第二极与第二电压端连接;以及,
    上拉控制节点维持电容,第一端与所述上拉控制节点连接,第二端与第三电压端连接。
  6. 如权利要求1所述的栅极驱动单元,其中,还包括复位电路;
    所述复位电路配置为在空白区复位端输入的空白区复位信号的控制下,控制所述下拉节点的电位为有效电压。
  7. 如权利要求1至6中任一权利要求所述的栅极驱动单元,其中,所述上拉节点控制电路包括:
    第一上拉节点控制晶体管,控制极与第一电压端连接,第一极与所述第一上拉节点连接,第二极与所述上拉控制节点连接;以及,
    第二上拉节点控制晶体管,控制极与所述第一电压端连接,第一极与所述第二上拉节点连接,第二极与所述上拉控制节点连接。
  8. 如权利要求1至6中任一权利要求所述的栅极驱动单元,其中,所述下拉节点控制电路包括:
    第一下拉节点控制晶体管,控制极和第一极都与所述第三时钟信号端连接,第二极与所述下拉节点连接;
    第二下拉节点控制晶体管,控制极和第二极都与所述第四时钟信号端连接,第一极与所述下拉节点连接;
    第三下拉节点控制晶体管,控制极与所述上拉控制节点连接,第一极与所述下拉节点连接,第二极与第二电压端连接;以及,
    下拉节点维持电容,第一端与所述下拉节点连接,第二端与第四电压端 连接。
  9. 如权利要求1至6中任一权利要求所述的栅极驱动单元,其中,所述第一栅极驱动信号输出电路包括第一输出晶体管和第一输出下拉晶体管;
    所述第一输出晶体管的控制极与所述第一上拉节点连接,所述第一输出晶体管的第一极与所述第一时钟信号端连接,所述第一输出晶体管的第二极与所述第一栅极驱动信号输出端连接;
    所述第一输出下拉晶体管的控制极与所述下拉节点连接,所述第一输出下拉晶体管的第一极与所述第一栅极驱动信号输出端连接,所述第一输出下拉晶体管的第二极与第二电压端连接。
  10. 权利要求1至6中任一权利要求所述的栅极驱动单元,其中,所述第二栅极驱动信号输出电路包括第二输出晶体管和第二输出下拉晶体管;
    所述第二输出晶体管的控制极与所述第二上拉节点连接,所述第二输出晶体管的第一极与所述第二时钟信号端连接,所述第二输出晶体管的第二极与所述第二栅极驱动信号输出端连接;
    所述第二输出下拉晶体管的控制极与所述下拉节点连接,所述第二输出下拉晶体管的第一极与所述第二栅极驱动信号输出端连接,所述第二输出下拉晶体管的第二极与第二电压端连接。
  11. 如权利要求1至6中任一权利要求所述的栅极驱动单元,其中,还包括触控输出控制电路;
    所述触控输出控制电路配置为在触控输出控制端输入的触控输出控制信号的控制下,控制所述第一栅极驱动信号输出端和所述第二栅极驱动信号输出端都输出无效电压。
  12. 如权利要求1至6中任一权利要求所述的栅极驱动单元,其中,还包括息屏控制电路;
    所述息屏控制电路用于在息屏控制端输入的息屏控制信号的控制下,控制所述第一栅极驱动信号输出端和所述第二栅极驱动信号输出端都输出有效电压。
  13. 一种栅极驱动方法,用于驱动如权利要求1至12中任一权利要求所述的栅极驱动单元,一帧画面显示时间包括第一显示周期和第二显示周期, 所述第一显示周期包括依次设置的第一输入时间段和第一输出时间段;所述第二显示周期包括依次设置的第二输入时间段和第二输出时间段;所述栅极驱动方法包括:
    在第一输入时间段和第二输入时间段,上拉控制节点控制电路在起始信号的控制下,控制上拉控制节点的电位为有效电压,上拉节点控制电路根据所述上拉控制节点的电位,控制第一上拉节点的电位和第二上拉节点的电位为有效电压;
    在第一输出时间段,上拉控制节点控制电路维持所述上拉控制节点的电位为有效电压,第一时钟信号端输入有效电压,第一栅极驱动信号输出电路在所述第一上拉节点的电位的控制下,控制所述第一栅极驱动信号输出端与第一时钟信号端之间连通,以控制第一栅极驱动信号输出端输出有效电压;
    在第二输出时间段,上拉控制节点控制电路维持所述上拉控制节点的电位为有效电压,第二时钟信号端输入有效电压,第二栅极驱动信号输出电路在所述第二上拉节点的电位的控制下,控制所述第二栅极驱动信号输出端与第二时钟信号端之间连通,以控制第二栅极驱动信号输出端输出有效电压。
  14. 如权利要求13所述的栅极驱动方法,其中,所述第一显示周期还包括设置于所述第一输出时间段之后的第一输出复位时间段和第一下拉节点控制时间段,所述第二显示周期还包括设置于所述第二输出时间段之后的第二输出复位时间段和第二下拉节点控制时间段,所述栅极驱动方法还包括:
    在第一输出复位时间段,上拉控制节点控制电路维持所述上拉控制节点的电位为有效电压,第一时钟信号端输入无效电压,第一栅极驱动信号输出电路在所述第一上拉节点的电位的控制下,控制所述第一栅极驱动信号输出端与第一时钟信号端之间连通,以控制第一栅极驱动信号输出端输出无效电压;
    在第一下拉节点控制时间段,第三时钟信号端输入有效电压,下拉节点控制电路在第三时钟信号的控制下,控制下拉节点的电压为有效电压,第一栅极驱动信号输出电路在所述下拉节点的电位的控制下,控制对所述第一栅极驱动信号输出端输出的第一栅极驱动信号进行复位;
    在第二输出复位时间段,上拉控制节点控制电路维持所述上拉控制节点 的电位为有效电压,第二时钟信号端输入无效电压,第二栅极驱动信号输出电路在所述第二上拉节点的电位的控制下,控制所述第二栅极驱动信号输出端与第二时钟信号端之间连通,以控制第二栅极驱动信号输出端输出无效电压;
    在第二下拉节点控制时间段,第四时钟信号端输入有效电压,下拉节点控制电路在第四时钟信号的控制下,控制下拉节点的电压为有效电压,第二栅极驱动信号输出电路在所述下拉节点的电位的控制下,控制对所述第二栅极驱动信号输出端输出的第二栅极驱动信号进行复位。
  15. 如权利要求14所述的栅极驱动方法,其中,所述第一显示周期还包括设置于所述第一下拉节点控制时间段之后的第一输出截止保持时间段,所述第二显示周期还包括设置于所述第二下拉节点控制时间段之后的第二输出截止保持时间段;所述栅极驱动方法还包括:
    在第一输出截止保持时间段,下拉节点控制电路维持所述下拉节点的电压为有效电压,第一栅极驱动信号输出电路在所述下拉节点的电位的控制下,控制对所述第一栅极驱动信号输出端输出的第一栅极驱动信号进行复位;
    在第二输出截止保持时间段,下拉节点控制电路维持所述下拉节点的电压为有效电压,第二栅极驱动信号输出电路在所述下拉节点的电位的控制下,控制对所述第二栅极驱动信号输出端输出的第二栅极驱动信号进行复位。
  16. 如权利要求13至15中任一权利要求所述的栅极驱动方法,其中,还包括:
    在第一输入时间段和第二输入时间段,第一时钟信号端和第二时钟信号端输入无效电压,第一栅极驱动信号输出电路在所述第一上拉节点的电位的控制下,控制所述第一栅极驱动信号输出端与第一时钟信号端之间连通,以控制第一栅极驱动信号输出端输出无效电压,第二栅极驱动信号输出电路在所述第二上拉节点的电位的控制下,控制所述第二栅极驱动信号输出端与第二时钟信号端之间连通,以控制第二栅极驱动信号输出端输出无效电压;
    在第一输出时间段,第二时钟信号端输入有效电压,第二栅极驱动信号输出电路在所述第二上拉节点的电位的控制下,控制所述第二栅极驱动信号输出端与第二时钟信号端之间连通,以控制第二栅极驱动信号输出端输出无 效电压;
    在第二输出时间段,第一时钟信号端输入有效电压,第一栅极驱动信号输出电路在所述第一上拉节点的电位的控制下,控制所述第一栅极驱动信号输出端与第一时钟信号端之间连通,以控制第一栅极驱动信号输出端输出无效电压。
  17. 如权利要求13至15中任一权利要求所述的栅极驱动方法,其中,所述栅极驱动单元还包括复位电路,所述栅极驱动方法还包括:
    在两显示周期之间设置的空白时间段,所述复位电路在空白区复位端输入的空白区复位信号的控制下,控制下拉节点的电位为有效电压。
  18. 一种栅极驱动电路,包括多级如权利要求1至12中任一权利要求所述的栅极驱动单元。
  19. 如权利要求18所述的栅极驱动电路,其中,所述起始端包括奇数行起始端和偶数行起始端;
    除了第一级栅极驱动单元,每一级栅极驱动单元的奇数行起始端与相邻上一级栅极驱动单元的第一栅极驱动信号输出端连接,每一级栅极驱动单元的偶数行起始端与相邻上一级栅极驱动单元的第二栅极驱动信号输出端连接;
    第一级栅极驱动单元的奇数行起始端与第一起始信号输入端连接,第一级栅极驱动单元的偶数行起始端与第二起始信号输入端连接。
  20. 如权利要求18所述的栅极驱动电路,其中,所述起始端包括正向奇数行起始端、反向奇数行起始端、正向偶数行起始端和反向奇数行起始端;所述栅极驱动单元还包括正向扫描控制端和反向扫描控制端;
    除了第一级栅极驱动单元,每一级栅极驱动单元的正向奇数行起始端与相邻上一级栅极驱动单元的第一栅极驱动信号输出端连接,每一级栅极驱动单元的正向偶数行起始端与相邻上一级栅极驱动单元的第二栅极驱动信号输出端连接;
    第一级栅极驱动单元的正向奇数行起始端与第一正向起始信号输入端连接,第一级栅极驱动单元的正向偶数行起始端与第二正向起始信号输入端连接;
    除了最后一级栅极驱动单元,每一级栅极驱动单元的反向奇数行起始端 与相邻下一级栅极驱动单元的第一栅极驱动信号输出端连接,每一级栅极驱动单元的反向偶数行起始端与相邻下一级栅极驱动单元的第二栅极驱动信号输出端连接;
    最后一级栅极驱动单元的反向奇数行起始端与第一反向起始信号输入端连接,最后一级栅极驱动单元的反向偶数行起始端与第二反向起始信号输入端连接。
  21. 如权利要求19或20所述的栅极驱动电路,其中,第2n-1级栅极驱动单元的第一时钟信号端与第一时钟信号输入端连接,第2n-1级栅极驱动单元的第二时钟信号端与第二时钟信号输入端连接,第2n-1级栅极驱动单元的第一时钟信号端与第五时钟信号输入端连接,第2n-1级栅极驱动单元的第二时钟信号端与第六时钟信号输入端连接;
    第2n级栅极驱动单元的第一时钟信号端与第三时钟信号输入端连接,第2n级栅极驱动单元的第二时钟信号端与第四时钟信号输入端连接,第2n级栅极驱动单元的第一时钟信号端与第七时钟信号输入端连接,第2n级栅极驱动单元的第二时钟信号端与第八时钟信号输入端连接;
    n为正整数。
  22. 一种栅极驱动方法,应用于如权利要求18至21中任一权利要求所述的栅极驱动电路,一帧画面显示时间包括第一显示周期和第二显示周期;所述栅极驱动方法包括:
    在第一显示周期,所述栅极驱动电路包括的各级栅极驱动单元逐级通过其第一栅极驱动信号输出端输出有效电压;
    在第二显示周期,所述栅极驱动电路包括的各级栅极驱动单元逐级通过其第二栅极驱动信号输出端输出有效电压。
  23. 如权利要求22所述的栅极驱动方法,其中,第一显示周期包括依次设置的M个显示时间段,第二显示周期包括依次设置的M个显示时间段,M为所述栅极驱动电路包括的栅极驱动单元的总级数;所述栅极驱动方法包括:在正向扫描时,
    在所述第一显示周期中的第m个显示时间段,所述栅极驱动电路包括的第m级栅极驱动单元通过其第一栅极驱动信号输出端输出有效电压;
    在所述第二显示周期中的第m个显示时间段,所述栅极驱动电路包括的第m级栅极驱动单元通过其第二栅极驱动信号输出端输出有效电压;
    M为大于1的整数,m为小于或等于M的正整数。
  24. 如权利要求22所述的栅极驱动方法,其中,第一显示周期包括依次设置的M个显示时间段,第二显示周期包括依次设置的M个显示时间段,M为所述栅极驱动电路包括的栅极驱动单元的总级数;所述栅极驱动方法包括:在反向扫描时,
    在所述第一显示周期中的第m个显示时间段,所述栅极驱动电路包括的第M-m+1级栅极驱动单元通过其第一栅极驱动信号输出端输出有效电压;
    在所述第二显示周期中的第m个显示时间段,所述栅极驱动电路包括的第M-m+1级栅极驱动单元通过其第二栅极驱动信号输出端输出有效电压;
    M为大于1的整数,m为小于或等于M的正整数。
  25. 一种显示面板,包括显示基板,还包括设置于所述显示基板上的2M行栅线和如权利要求18至21中任一权利要求所述的栅极驱动电路;M为所述栅极驱动电路包括的栅极驱动单元的总级数;
    所述栅极驱动电路的第m级栅极驱动单元的第一栅极驱动信号输出端与第2m-1行栅线连接;
    所述栅极驱动电路的第m级栅极驱动单元的第二栅极驱动信号输出端与第2m行栅线连接;
    M为大于1的整数,m为小于或等于M的正整数。
  26. 一种显示面板,包括显示基板,还包括设置于所述显示基板上的2M行栅线和两个如权利要求18至21中任一权利要求所述的栅极驱动电路;M为所述栅极驱动电路包括的栅极驱动单元的总级数;
    第一个所述栅极驱动电路的第m级栅极驱动单元的第一栅极驱动信号输出端与第2m-1行栅线的左端连接;
    第一个所述栅极驱动电路的第m级栅极驱动单元的第二栅极驱动信号输出端与第2m行栅线的左端连接;
    第二个所述栅极驱动电路的第m级栅极驱动单元的第一栅极驱动信号输出端与第2m-1行栅线的右端连接;
    第二个所述栅极驱动电路的第m级栅极驱动单元的第二栅极驱动信号输出端与第2m行栅线的右端连接;
    M为大于1的整数,m为小于或等于M的正整数。
  27. 一种显示装置,包括如权利要求25所述的显示面板或如权利要求26所述的显示面板。
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