WO2014173020A1 - 栅极驱动电路和阵列基板 - Google Patents

栅极驱动电路和阵列基板 Download PDF

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Publication number
WO2014173020A1
WO2014173020A1 PCT/CN2013/078902 CN2013078902W WO2014173020A1 WO 2014173020 A1 WO2014173020 A1 WO 2014173020A1 CN 2013078902 W CN2013078902 W CN 2013078902W WO 2014173020 A1 WO2014173020 A1 WO 2014173020A1
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WIPO (PCT)
Prior art keywords
module
gate driving
resistor
input port
gate
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PCT/CN2013/078902
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English (en)
French (fr)
Inventor
张郑欣
郑义
Original Assignee
京东方科技集团股份有限公司
北京京东方光电科技有限公司
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Application filed by 京东方科技集团股份有限公司, 北京京东方光电科技有限公司 filed Critical 京东方科技集团股份有限公司
Priority to EP13856062.8A priority Critical patent/EP2991069B1/en
Priority to KR1020147017471A priority patent/KR101583177B1/ko
Priority to JP2016509260A priority patent/JP2016524175A/ja
Priority to US14/361,535 priority patent/US9425611B2/en
Publication of WO2014173020A1 publication Critical patent/WO2014173020A1/zh

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/20—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for electronic equipment
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3674—Details of drivers for scan electrodes
    • G09G3/3677—Details of drivers for scan electrodes suitable for active matrices only
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H1/00—Details of emergency protective circuit arrangements
    • H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
    • H02H3/28—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at two spaced portions of a single system, e.g. at opposite ends of one line, at input and output of apparatus
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264—Details of driving circuits
    • G09G2310/0286—Details of a shift registers arranged for use in a driving circuit
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264—Details of driving circuits
    • G09G2310/0291—Details of output amplifiers or buffers arranged for use in a driving circuit
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/08—Fault-tolerant or redundant circuits, or circuits in which repair of defects is prepared
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/12—Test circuits or failure detection circuits included in a display system, as permanent part thereof

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a gate driving circuit and an array substrate. Background technique
  • the GOA circuit includes a plurality of GOA units, each GOA unit is connected to a pair of inverted clock signals, and the output corresponds to a gate line signal for driving a gate line, and a specific output end of each GOA unit is connected Grid line;
  • the inventors have found that the GOA unit is connected to a pair of inverted clock signals at the same time, the input path of the pair of inverted clock signals is usually close to or even overlap, similar to the capacitor, and the pair of inverted clocks The voltage difference between the signals can reach 20 volts.
  • the high voltage easily causes the similar capacitance formed between the input paths of the inverted clock signals to be broken down, so that the input path of the inverted clock signal is short-circuited, and the short-circuited GOA unit Abnormal operation, which may cause all GOA units to work abnormally, and even cause abnormal operation of the integrated circuit inside the liquid crystal display.
  • the technical problem to be solved by the embodiments of the present invention is to provide a gate driving circuit and an array substrate, which can ensure that the remaining gate driving units can work normally when a fault such as a short circuit occurs in the input path of the clock signal of a certain gate driving unit. .
  • the first aspect of the embodiments of the present invention provides a gate driving circuit including a plurality of gate driving unit groups, each of which is The pole driving unit group includes m gate driving units, the m is an integer greater than 1, and each of the gate driving unit groups outputs a gate driving signal to the same gate line, in the gate driving unit group
  • the m is an integer greater than or equal to 2 and less than or equal to 5.
  • Each of the gate driving units includes a gate driving module, a detecting module, and a control module, wherein the gate driving module includes a first input port and a second input port, and the first input port of the gate driving module Connecting a first clock signal, the second input port of the gate driving module is connected to a second clock signal that is opposite to the first clock signal,
  • the detecting module detects a short circuit between the first input port of the gate driving module and the second input port of the gate driving module, sending a short circuit signal to the control module, where the control module is configured according to the The short circuit signal disconnects the connection of the first input port of the gate driving module with the first clock signal and the connection of the second input port of the gate driving module with the second clock signal.
  • the detection module includes a subtraction submodule and an absolute value submodule.
  • the subtraction sub-module has a first input port and a second input port, a first input port of the subtraction sub-module is connected to a first input port of the gate drive module, and a second input port of the subtraction sub-module is connected a second input port of the gate driving module, a difference between an input signal of the first input port of the gate driving module and a second input port of the gate driving module, and an output of the subtracting submodule End-connecting the absolute value sub-module, and outputting a difference signal to the absolute value sub-module;
  • the output terminal of the absolute value sub-module is connected to the control module, and takes the absolute value of the received difference signal.
  • the short-circuit signal is sent to the control module.
  • the subtraction submodule includes:
  • a first resistor a second resistor, a third resistor, a fourth resistor, and a first operational amplifier; a first end of the first resistor is coupled to a first input port of the subtraction sub-module, and a second Connecting an inverting input terminal of the first operational amplifier;
  • the first end of the second resistor is connected to the second input port of the subtraction sub-module, and the second end of the second resistor is connected to the non-inverting input end of the first operational amplifier;
  • a first end of the third resistor is connected to an inverting input end of the first operational amplifier, and a second end of the third resistor is connected to an output end of the first operational amplifier;
  • a first end of the fourth resistor is connected to an inverting input end of the first operational amplifier, and a second end of the fourth resistor is grounded;
  • An inverting input end of the first operational amplifier is connected to a second end of the first resistor, and a non-inverting input end of the first operational amplifier is connected to a second end of the second resistor, where the first operational amplifier
  • the output end is connected to the output end of the subtraction submodule;
  • the resistance of the first resistor is equal to the resistance of the second resistor, and the resistance of the third resistor is equal to the resistance of the fourth resistor.
  • the absolute value submodule includes:
  • the input end of the first diode is connected to the input end of the absolute value sub-module, and the output end of the first diode is connected to the output end of the absolute value sub-module;
  • the first end of the fifth resistor is connected to the input end of the absolute value sub-module, and the second end of the fifth resistor is connected to the inverting input end of the second operational amplifier;
  • the first end of the sixth resistor is connected to the inverting input end of the second operational amplifier, and the second end of the sixth resistor is connected to the output end of the absolute value submodule;
  • An inverting input end of the second operational amplifier is connected to a second end of the fifth resistor, a non-inverting input end of the second operational amplifier is grounded, and an output end of the second operational amplifier is connected to the absolute value The output of the module;
  • the resistance of the fifth resistor is equal to the resistance of the sixth resistor.
  • the control module includes a first switch tube and a second switch tube,
  • the gates of the first switch tube and the second switch tube are connected to the output end of the absolute value submodule
  • the first end of the first switch is connected to the first clock signal, and the second end of the first switch is connected to the first signal input end of the gate drive module;
  • the first end of the second switch tube is connected to the second clock signal, and the second end of the second switch tube is connected to the second signal input end of the gate drive module.
  • the first switching transistor and the second switching transistor are thin film transistors.
  • a second aspect of an embodiment of the present invention provides an array substrate comprising the gate drive circuit of the above claims.
  • the gate driving circuit includes a plurality of gate driving unit groups, each of the gate driving unit groups includes m gate driving units, and the m is greater than An integer of 1, when the one of the gate driving unit groups fails, terminating the operation of the failed gate driving unit.
  • each of the gate driving unit groups includes at least two gate driving units, and each gate driving unit outputs a gate driving signal to the same gate line, The normal operation of the gate line is largely ensured, the reliability of the operation of the gate driving circuit is improved, and the user experience is improved.
  • FIG. 1 is a schematic structural diagram of a gate driving circuit according to an embodiment of the present invention.
  • FIG. 2 is a schematic structural view 1 of a gate driving unit lm according to an embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of a detection module according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of a subtraction submodule according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of an absolute value submodule according to an embodiment of the present invention.
  • FIG. 6 is a schematic structural view 2 of a gate driving unit lm according to an embodiment of the present invention.
  • FIG. 7 is a schematic diagram of signals received by a first signal input terminal a and a second signal input terminal b of a short-circuit front gate driving module according to an embodiment of the present invention
  • FIG. 8 is a schematic diagram of signals received by the first signal input terminal a and the second signal input terminal b of the gate driving module after short circuit in the embodiment of the present invention. detailed description
  • An embodiment of the present invention provides a gate driving circuit. As shown in FIG. 1 , a plurality of gate driving unit groups are included. Each of the gate driving unit groups includes m gate driving units, and the m is greater than 1. An integer of the plurality of gate driving unit groups corresponding to the number of gates, each of the gate driving unit groups outputting a gate driving signal to the same gate line, when the gate driving unit When one gate driving unit in the group fails, the operation of the failed gate driving unit is terminated and the gate driving unit group is maintained by other gate driving units.
  • the m is an integer greater than or equal to 2 and less than or equal to 5.
  • m is less than 2, the function described in the embodiment of the present invention cannot be implemented, and when m is an integer greater than 5, the function of the embodiment of the present invention can be implemented. , but will significantly increase the complexity of the processing and wiring. As can be seen from FIG.
  • the gate driving signals received by any one of the gate lines are commonly provided by the respective gate driving units in the same group, so that when any one of the gate driving units is terminated due to a fault, After the operation, the remaining gate driving units can still continue to work normally, and the possibility that the gate driving units in the same group are simultaneously short-circuited and the like is small, so that the gate lines can continue to receive the normal gate driving signals.
  • the operational reliability of the gate driving circuit is improved, and the user experience is improved.
  • the gate driving circuit includes a plurality of gate driving unit groups, each of the gate driving unit groups includes m gate driving units, and the m is an integer greater than 1.
  • each of the gate driving unit groups fails, the operation of the failed gate driving unit is terminated.
  • each of the gate driving unit groups includes at least two gate driving units, and each gate driving unit outputs a gate driving signal to the same gate line, The normal operation of the gate line is largely ensured, the reliability of the operation of the gate driving circuit is improved, and the user experience is improved.
  • the gate driving unit lm in the first gate driving unit group in FIG. 1 is taken as an example.
  • the gate is as shown in FIG.
  • the pole driving unit lm includes a gate driving module, a detecting module and a control module, wherein the gate driving module includes a first input port a and a second input port b, and the first input port a of the gate driving module is connected
  • the first clock signal CLK, the second input port b of the gate driving module is connected to the second clock signal CLKB that is inverted from the first clock signal CLK.
  • the detecting module detects whether a short circuit is between the first input port a and the second input port b of the gate driving module.
  • the control module controls signals input to the gate drive module. Specifically, when the detecting module detects a short circuit between the first input port a of the gate driving module and the second input port b of the gate driving module, sending a short circuit signal to the control module, where The control module disconnects the connection of the first input port a of the gate driving module with the first clock signal CLK and the second input port b and the second clock signal of the gate driving module according to the short circuit signal CLKB connection.
  • the detection module specifically includes a subtraction submodule and an absolute value submodule.
  • the subtraction sub-module has a first input port c (a first input port c of the detection module) and a second input port d (a first input port d of the detection module), as can be seen in conjunction with FIG. 2, a first input port c of the subtraction sub-module is connected to the first input port a of the gate driving unit, and a second input port d of the subtraction sub-module is connected to the second input port b of the gate driving unit, to the gate
  • the input signal of the first input port a of the driving module and the second input port b of the gate driving module are used as a difference, and the output of the subtracting sub-module is connected to the absolute value sub-module, and the absolute value is taken
  • the value submodule outputs a difference signal.
  • the output end of the absolute value sub-module (ie, the output end g of the detection module in FIG. 2) is connected to the control module, and takes an absolute value of the received difference signal, when the absolute value is less than a preset At the time of the value, a short circuit signal is sent to the control module.
  • the subtraction submodule includes: a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, and a first operational amplifier;
  • the first end of the first resistor R1 is connected to the first input port c of the subtraction sub-module, and the second end of the first resistor R1 is connected to the inverting input end of the first operational amplifier;
  • the second end of the second resistor R2 is connected to the second input port d of the subtraction sub-module, and the second end of the second resistor R2 is connected to the non-inverting input end of the first operational amplifier;
  • the first end of the third resistor R3 is connected to the inverting input end of the first operational amplifier, and the second end of the third resistor R3 is connected to the output end of the first operational amplifier;
  • the first end of the fourth resistor R4 is connected to the inverting input terminal of the first operational amplifier, and the second end of the fourth resistor R4 is grounded.
  • the resistance of the first resistor R1 is equal to the resistance of the second resistor R2, and the resistance of the third resistor R3 is equal to the resistance of the fourth resistor R4.
  • the absolute value submodule includes:
  • a first diode D1 a fifth resistor R5, a sixth resistor R6, and a second operational amplifier, wherein an input end of the first diode D1 is connected to an input end of the absolute value submodule, the first two The output end of the pole tube D1 is connected to the output terminal g of the absolute value submodule;
  • the first end of the fifth resistor R5 is connected to the input terminal of the absolute value sub-module, and the second end of the fifth resistor R5 is connected to the inverting input end of the second operational amplifier;
  • the first end of the sixth resistor R6 is connected to the inverting input end of the second operational amplifier, and the second end of the sixth resistor R6 is connected to the output end of the absolute value submodule;
  • An inverting input end of the second operational amplifier is coupled to a second end of the fifth resistor R5, The non-inverting input of the second operational amplifier is grounded, and the output of the second operational amplifier is connected to the output of the absolute sub-module.
  • the resistance of the fifth resistor R5 is equal to the resistance of the sixth resistor R6.
  • the absolute value sub-module processes the difference signal U1 output by the subtraction sub-module as:
  • the absolute value submodule sends U2 from the output terminal g to the control module.
  • control module includes a first switch tube T1 and a second switch tube T2,
  • the gates of the first switch tube T1 and the second switch tube T2 are connected to the output terminal g of the absolute value submodule.
  • the first end of the first switch tube T1 is connected to the first clock signal CLK, and the second end of the first switch tube is connected to the first signal input end a of the gate drive module;
  • the first end of the second switch tube T2 is connected to the second clock signal CLKB, and the second end of the second switch tube T2 is connected to the second signal input end b of the gate drive module.
  • the signal received by the first signal input terminal a is the first clock signal CLK
  • the signal received by the two signal inputs is the second clock signal CLKB.
  • the high level voltages of the first clock signal CLK and the second clock signal CLKB are both about 12 volts to 15 volts, and the low level voltages are all about -8 volts to 12 volts, then the first clock signal CLK and the second clock signal Electricity u _ R 3 x (CLKB - CLK) between CLKB
  • the first switch tube T1 and the second switch tube T2 of the module are kept in an on state, and the gate drive module can be connected to the first clock signal CLK and the second clock signal CLKB to operate normally.
  • the first signal input terminal a and the second signal input terminal b of the gate driving unit are short-circuited, as shown in FIG. 8, the first signal input terminal a receives the first clock signal CLK and the second clock signal CLKB simultaneously. , the level of the received signal is very small, almost zero; similarly, the second clock signal The level of the signal received at input b is also small.
  • the difference between the levels received by the first signal input terminal a and the second signal input terminal b is small, which is insufficient to maintain the conduction state of the first switch tube T1 and the second switch tube T2 in the control module, and control
  • the first switch tube T1 and the second switch tube T2 of the module are turned off, so that the gate driving unit is disconnected from the first clock signal CLK and the second clock signal CLKB, thereby ensuring that the remaining gate driving units are not subjected to the shorted gate.
  • the influence of the pole drive unit ensures that the gate drive circuit can work normally.
  • the first switch tube T1 and the second switch tube T2 are thin film transistors.
  • the first switch tube T1 and the second switch tube are arranged in an embodiment of the invention.
  • T2 is an N-type thin film transistor.
  • Embodiments of the present invention also provide an array substrate including the above-described gate driving circuit.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Liquid Crystal (AREA)
  • Liquid Crystal Display Device Control (AREA)

Abstract

公开了一种栅极驱动电路和阵列基板，涉及显示技术领域，能够在某一个栅极驱动单元的时钟信号的输入通路发生短路等故障时，保证其余栅极驱动单元能够正常工作。该栅极驱动电路，包括多个栅极驱动单元组，每一个栅极驱动单元组包括m个栅极驱动单元，m为大于1的整数，每一个栅极驱动单元组向同一条栅线输出栅极驱动信号，当栅极驱动单元组中的一个栅极驱动单元故障时，终止故障的栅极驱动单元的工作并由其它栅极驱动单元维持栅极驱动单元组工作。

Description

栅极驱动电路和阵列 技术领域
本发明涉及显示技术领域， 尤其涉及一种栅极驱动电路和阵列基板。 背景技术
近些年来液晶显示器的发展呈现出了高集成度， 低成本的发展趋势。 其 中一项非常重要的技术就是阵列基板行驱动 (Gate Driver on Array,筒称 GOA) 的技术量产化的实现。利用 GOA技术将栅极驱动电路集成在液晶显示面板的 阵列基板上， 从而可以省掉原有的集成的栅极驱动电路， 以从材料成本和制 作工艺两方面降低产品成本。这种利用 GOA技术集成在阵列基板上的栅极驱 动电路也称为 GO A 电路。
在现有技术中， GOA电路包括若干个 GOA单元， 每一 GOA单元接入 一对反相的时钟信号， 输出对应驱动一条栅线的栅线信号， 具体的每一 GOA 单元的输出端连接一条栅线； 发明人发现， GOA单元由于同时接入一对反相 的时钟信号， 这一对反相的时钟信号的输入通路通常很靠近甚至交叠， 类似 电容， 并且这一对反相的时钟信号之间的压差可以达到 20伏特， 高压容易导 致反相的时钟信号的输入通路之间形成的类似电容被击穿， 使得反相的时钟 信号的输入通路短路，则该发生短路的 GOA单元工作异常，进而可能导致所 有 GOA单元工作异常， 甚至导致液晶显示器内部的集成电路的工作异常。 发明内容
本发明实施例所要解决的技术问题在于提供一种栅极驱动电路和阵列基 板， 能够在某一个栅极驱动单元的时钟信号的输入通路发生短路等故障时， 保证其余栅极驱动单元能够正常工作。
为解决上述技术问题，本发明实施例的显示技术领域采用如下技术方案： 本发明实施例的第一方面提供了一种栅极驱动电路， 包括多个栅极驱动 单元组，每一个所述栅极驱动单元组包括 m个栅极驱动单元， 所述 m为大于 1 的整数， 每一个所述栅极驱动单元组向同一条栅线输出栅极驱动信号， 当 所述栅极驱动单元组中的一个栅极驱动单元故障时， 终止所述故障的栅极驱 动单元的工作并由其它栅极驱动单元维持所述栅极驱动单元组工作。 所述 m为大于等于 2并且小于等于 5的整数。
每个所述栅极驱动单元包括栅极驱动模块、检测模块和控制模块，其中， 所述栅极驱动模块包括第一输入端口和第二输入端口， 所述栅极驱动模块的 第一输入端口连接第一时钟信号， 所述栅极驱动模块的第二输入端口连接与 所述第一时钟信号反相的第二时钟信号，
当所述检测模块检测到所述栅极驱动模块的第一输入端口和所述栅极驱 动模块的第二输入端口之间短路时， 向所述控制模块发送短路信号， 所述控 制模块根据所述短路信号， 断开所述栅极驱动模块的第一输入端口与第一时 钟信号的连接、和所述栅极驱动模块的第二输入端口与第二时钟信号的连接。
所述检测模块包括减法子模块和取绝对值子模块，
所述减法子模块具有第一输入端口和第二输入端口， 所述减法子模块的 第一输入端口连接所述栅极驱动模块的第一输入端口， 所述减法子模块的第 二输入端口连接所述栅极驱动模块的第二输入端口， 对所述栅极驱动模块的 第一输入端口和所述栅极驱动模块的第二输入端口的输入信号做差值， 所述 减法子模块的输出端连接所述取绝对值子模块， 向所述取绝对值子模块输出 差值信号；
所述取绝对值子模块的输出端连接所述控制模块， 对接收到的所述差值 信号取绝对值， 当所述绝对值小于预设值时， 向所述控制模块发送短路信号。
所述减法子模块包括：
第一电阻、 第二电阻、 第三电阻、 第四电阻和第一运算放大器； 所述第一电阻的第一端连接所述减法子模块的第一输入端口， 所述第一 电阻的第二端连接所述第一运算放大器的反相输入端；
所述第二电阻的第一端连接所述减法子模块的第二输入端口， 所述第二 电阻的第二端连接所述第一运算放大器的同相输入端；
所述第三电阻的第一端连接所述第一运算放大器的反相输入端， 所述第 三电阻的第二端连接所述第一运算放大器的输出端；
所述第四电阻的第一端连接所述第一运算放大器的反相输入端， 所述第 四电阻的第二端接地；
所述第一运算放大器的反相输入端连接所述第一电阻的第二端， 所述第 一运算放大器的同相输入端连接所述第二电阻的第二端， 所述第一运算放大 器的输出端连接所述减法子模块的输出端； 其中， 所述第一电阻的阻值与所述第二电阻的阻值相等， 所述第三电阻 的阻值与所述第四电阻的阻值相等。
所述取绝对值子模块包括：
第一二极管、 第五电阻、 第六电阻和第二运算放大器，
所述第一二极管的输入端连接所述取绝对值子模块的输入端， 所述第一 二极管的输出端连接所述取绝对值子模块的输出端；
所述第五电阻的第一端连接所述取绝对值子模块的输入端， 所述第五电 阻的第二端连接所述第二运算放大器的反相输入端；
所述第六电阻的第一端连接所述第二运算放大器的反相输入端， 所述第 六电阻的第二端连接所述取绝对值子模块的输出端；
所述第二运算放大器的反相输入端连接所述第五电阻的第二端， 所述第 二运算放大器的同相输入端接地， 所述第二运算放大器的输出端连接所述取 绝对值子模块的输出端；
其中， 所述第五电阻的阻值与所述第六电阻的阻值相等。
所述控制模块包括第一开关管和第二开关管，
所述第一开关管和所述第二开关管的栅极连接所述取绝对值子模块的输 出端，
所述第一开关管的第一端连接所述第一时钟信号， 所述第一开关管的第 二端连接所述栅极驱动模块的第一信号输入端；
所述第二开关管的第一端连接所述第二时钟信号， 所述第二开关管的第 二端连接所述栅极驱动模块的第二信号输入端。
所述第一开关管和所述第二开关管为薄膜晶体管。
本发明实施例的第二方面提供了一种阵列基板， 包括权利要求上述的栅 极驱动电路。
在本发明实施例所提供的技术方案中， 所述栅极驱动电路包括多个个栅 极驱动单元组， 每一个所述栅极驱动单元组包括 m个栅极驱动单元， 所述 m 为大于 1的整数， 当所述栅极驱动单元组中的一个栅极驱动单元故障时， 终 止所述故障的栅极驱动单元的工作。 则故障的栅极驱动单元被终止后， 由于 每一个所述栅极驱动单元组中包括至少两个栅极驱动单元， 且各栅极驱动单 元都向同一条栅线输出栅极驱动信号，在很大程度上保证了栅线的正常工作， 提高了该栅极驱动电路的工作的可靠性， 提高了用户的使用体验。 附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案， 下面将对实 施例描述中所需要使用的附图作筒单地介绍， 显而易见地， 下面描述中的附 图仅仅是本发明的一些实施例， 对于本领域普通技术人员来讲， 在不付出创 造性劳动的前提下， 还可以根据这些附图获得其他的附图。
图 1为本发明实施例中的栅极驱动电路的结构示意图；
图 2为本发明实施例中的栅极驱动单元 lm的结构示意图一；
图 3为本发明实施例中的检测模块的结构示意图；
图 4为本发明实施例中的减法子模块的结构示意图；
图 5为本发明实施例中的取绝对值子模块的结构示意图；
图 6为本发明实施例中的栅极驱动单元 lm的结构示意图二；
图 7为本发明实施例中的短路前栅极驱动模块的第一信号输入端 a和第 二信号输入端 b接收到的信号示意图； 以及
图 8为本发明实施例中的短路后栅极驱动模块的第一信号输入端 a和第 二信号输入端 b接收到的信号示意图。 具体实施方式
下面将结合本发明实施例中的附图， 对本发明实施例中的技术方案进行 清楚、 完整地描述， 显然， 所描述的实施例是本发明一部分实施例， 而不是 全部的实施例。 基于本发明中的实施例， 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， 都属于本发明保护的范围。
本发明实施例提供一种栅极驱动电路， 如图 1所示， 包括多个栅极驱动 单元组，每一个所述栅极驱动单元组包括 m个栅极驱动单元， 所述 m为大于 1的整数， 其中， 所述多个栅极驱动单元组与栅极的个数相对应， 每一个所 述栅极驱动单元组向同一条栅线输出栅极驱动信号， 当所述栅极驱动单元组 中的一个栅极驱动单元故障时， 终止所述故障的栅极驱动单元的工作并由其 它栅极驱动单元维持所述栅极驱动单元组工作。
优选地， 所述 m为大于等于 2并小于等于 5的整数， 当 m小于 2时无法 实现本发明实施例所述的功能， m为大于 5的整数时虽然也能够实现本发明 实施例的功能， 但会显著增加加工工艺以及布线的复杂性。 由图 1以及上文的描述可知， 任意一条栅线接收到的栅极驱动信号是由 同一组中的各个栅极驱动单元共同提供的， 所以， 当其中任何一个栅极驱动 单元由于故障被终止工作后， 其余的栅极驱动单元仍然可以继续正常工作， 并且， 同一组中的栅极驱动单元同时发生短路等故障的可能性很小， 使得栅 线可以继续接收到正常的栅极驱动信号， 提高了该栅极驱动电路的工作可靠 性， 提高了用户的使用体验。
在本实施例的技术方案中，所述栅极驱动电路包括多个栅极驱动单元组， 每一个所述栅极驱动单元组包括 m个栅极驱动单元，所述 m为大于 1的整数， 当所述栅极驱动单元组中的一个栅极驱动单元故障时， 终止所述故障的栅极 驱动单元的工作。 则故障的栅极驱动单元被终止后， 由于每一个所述栅极驱 动单元组中包括至少两个栅极驱动单元， 且各栅极驱动单元都向同一条栅线 输出栅极驱动信号， 在很大程度上保证了栅线的正常工作， 提高了该栅极驱 动电路的工作的可靠性， 提高了用户的使用体验。
具体地， 由于任一个栅极驱动单元的结构都相同， 故而以图 1中的第 1 个栅极驱动单元组中的栅极驱动单元 lm为例进行说明， 如图 2所示， 所述 栅极驱动单元 lm包括栅极驱动模块、 检测模块和控制模块， 其中， 所述栅 极驱动模块包括第一输入端口 a和第二输入端口 b,所述栅极驱动模块的第一 输入端口 a连接第一时钟信号 CLK, 所述栅极驱动模块的第二输入端口 b连 接与所述第一时钟信号 CLK反相的第二时钟信号 CLKB。所述检测模块检测 所述栅极驱动模块第一输入端口 a和第二输入端口 b之间是否短路。 所述控 制模块控制输入到所述栅极驱动模块的信号。 具体地， 当所述检测模块检测 到所述栅极驱动模块的第一输入端口 a和所述栅极驱动模块的第二输入端口 b之间短路时， 向所述控制模块发送短路信号， 所述控制模块根据所述短路 信号，断开所述栅极驱动模块的第一输入端口 a与第一时钟信号 CLK的连接、 和所述栅极驱动模块的第二输入端口 b与第二时钟信号 CLKB的连接。
进一步的， 在本实施例的技术方案中， 如图 3所示， 所述检测模块具体 包括减法子模块和取绝对值子模块。
具体地，所述减法子模块具有第一输入端口 c (检测模块的第一输入端口 c )和第二输入端口 d (检测模块的第一输入端口 d ), 结合图 2可看出， 所述 减法子模块的第一输入端口 c连接栅极驱动单元的第一输入端口 a,所述减法 子模块的第二输入端口 d连接栅极驱动单元的第二输入端口 b, 对所述栅极 驱动模块的第一输入端口 a和所述栅极驱动模块的第二输入端口 b的输入信 号做差值， 所述减法子模块的输出端连接所述取绝对值子模块， 向所述取绝 对值子模块输出差值信号。
所述取绝对值子模块的输出端 （即图 2中的检测模块的输出端 g )连接 所述控制模块， 对接收到的所述差值信号取绝对值， 当所述绝对值小于预设 值时， 向所述控制模块发送短路信号。
进一步的， 在本发明的实施例中， 如图 4所示， 所述减法子模块包括： 第一电阻 Rl、 第二电阻 R2、 第三电阻 R3、 第四电阻 R4和第一运算放 大器；
所述第一电阻 R1的第一端连接所述减法子模块的第一输入端口 c , 所述 第一电阻 R1的第二端连接所述第一运算放大器的反相输入端；
所述第二电阻 R2的第一端连接所述减法子模块的第二输入端口 d, 所述 第二电阻 R2的第二端连接所述第一运算放大器的同相输入端；
所述第三电阻 R3的第一端连接所述第一运算放大器的反相输入端，所述 第三电阻 R3的第二端连接所述第一运算放大器的输出端；
所述第四电阻 R4的第一端连接所述第一运算放大器的反相输入端，所述 第四电阻 R4的第二端接地。
其中， 所述第一电阻 R1的阻值与所述第二电阻 R2的阻值相等， 所述第 三电阻 R3的阻值与所述第四电阻 R4的阻值相等。
由于 R1=R2, R3=R4, 由图 4可知， 则减法子模块输出的差值信号 U1 的值为：
_ R3 x (CLKB - CLK)
(_7 同时， 如图 5所示， 所述取绝对值子模块包括：
第一二极管 Dl、 第五电阻 R5、 第六电阻 R6和第二运算放大器， 所述第一二极管 D1的输入端连接所述取绝对值子模块的输入端， 所述 第一二极管 D1的输出端连接所述取绝对值子模块的输出端 g;
所述第五电阻 R5的第一端连接所述取绝对值子模块的输入端，所述第五 电阻 R5的第二端连接所述第二运算放大器的反相输入端；
所述第六电阻 R6的第一端连接所述第二运算放大器的反相输入端，所述 第六电阻 R6的第二端连接所述取绝对值子模块的输出端；
所述第二运算放大器的反相输入端连接所述第五电阻 R5的第二端，所述 第二运算放大器的同相输入端接地， 所述第二运算放大器的输出端连接所述 取绝对值子模块的输出端。
其中， 所述第五电阻 R5的阻值与所述第六电阻 R6的阻值相等。
结合图 5可知， 取绝对值子模块对减法子模块输出的差值信号 U1的处 理为：
当 U1>0时， D1导通， U2=U1;
当 U1<0时， D1截止， U1经过第二运算放大器后， 由于 R5=R6, 贝' J
U2 = = -Vl
R5 之后， 如图 6所示， 所述取绝对值子模块将 U2自输出端 g发送给控制 模块。
进一步的， 在本发明的具体实施方式中， 如图 6所示， 所述控制模块包 括第一开关管 T1和第二开关管 T2,
所述第一开关管 T1和所述第二开关管 T2的栅极连接所述取绝对值子模 块的输出端 g,
所述第一开关管 T1的第一端连接所述第一时钟信号 CLK, 所述第一开 关管的第二端连接所述栅极驱动模块的第一信号输入端 a;
所述第二开关管 T2的第一端连接所述第二时钟信号 CLKB,所述第二开 关管 T2的第二端连接所述栅极驱动模块的第二信号输入端 b。
如图 7所示，在该栅极驱动单元的第一信号输入端 a和第二信号输入端 b 没有发生短路时， 则第一信号输入端 a接收到的信号为第一时钟信号 CLK, 第二信号输入端接收到的信号为第二时钟信号 CLKB。 第一时钟信号 CLK和 第二时钟信号 CLKB的高电平电压均为约 12伏特 ~15伏特，低电平电压均为 约 -8伏特一 12伏特， 则第一时钟信号 CLK与第二时钟信号 CLKB之间的电 u _ R3 x (CLKB - CLK)
压差始终为 20多伏特， 由之前的分析可知， 1 Ri , 当 U1>0 时， U2=U1; 当 U1<0时， U2=-U1 ; 则此时的 U2的电压值能够使得控制模 块的第一开关管 T1和第二开关管 T2保持导通状态， 该栅极驱动模块可以接 入到第一时钟信号 CLK和第二时钟信号 CLKB, 可以正常工作。
当该栅极驱动单元的第一信号输入端 a和第二信号输入端 b短路时， 如 图 8所示，第一信号输入端 a由于同时接收到第一时钟信号 CLK和第二时钟 信号 CLKB, 其接收到的信号的电平很小， 近乎为零； 同理， 第二时钟信号 输入端 b接收到的信号的电平也很小。 则第一信号输入端 a和第二信号输入 端 b分别接收到的电平的差值很小， 不足以保持控制模块中的第一开关管 T1 和第二开关管 T2的导通状态， 控制模块的第一开关管 T1和第二开关管 T2 关断，使得该栅极驱动单元与第一时钟信号 CLK和第二时钟信号 CLKB断开， 保证了其余栅极驱动单元不受到该短路的栅极驱动单元的影响， 保证了该栅 极驱动电路可以正常工作。
优选地， 所述第一开关管 T1和所述第二开关管 T2为薄膜晶体管。
优选地， 在本发明的实施例中， 所述第一开关管 T1和所述第二开关管
T2为 N型薄膜晶体管。
需要说明的是， 为了方便描述， 本发明实施例中仅有一对时钟信号 CLK 和 CLKB, 但本发明也可适用于具有多对时钟信号的栅极驱动电路， 具体实 施方式与前文类似， 在此不再赘述。
本发明实施例还提供了一种阵列基板， 包括上述的栅极驱动电路。
以上所述， 仅为本发明的具体实施方式， 但本发明的保护范围并不局限 于此， 任何熟悉本技术领域的技术人员在本发明揭露的技术范围内， 可轻易 想到变化或替换， 都应涵盖在本发明的保护范围之内。 因此， 本发明的保护 范围应以所述权利要求的保护范围为准。

Claims

权 利 要 求 书
1、 一种栅极驱动电路， 包括多个栅极驱动单元组， 每一个所述栅极驱动 单元组包括 m个栅极驱动单元， 所述 m为大于 1的整数，每一个所述栅极驱 动单元组向同一条栅线输出栅极驱动信号， 当所述栅极驱动单元组中的一个 栅极驱动单元故障时， 终止所述故障的栅极驱动单元的工作并由其它栅极驱 动单元维持所述栅极驱动单元组工作。
2、 根据权利要求 1所述的栅极驱动电路， 其特征在于， 所述 m为大于 等于 2并且小于等于 5的整数。
3、 根据权利要求 1或 2所述的栅极驱动电路， 其特征在于，
每个所述栅极驱动单元包括栅极驱动模块、检测模块和控制模块，其中， 所述栅极驱动模块包括第一输入端口和第二输入端口， 所述栅极驱动模块的 第一输入端口连接第一时钟信号， 所述栅极驱动模块的第二输入端口连接与 所述第一时钟信号反相的第二时钟信号，
当所述检测模块检测到所述栅极驱动模块的第一输入端口和所述栅极驱 动模块的第二输入端口之间短路时， 向所述控制模块发送短路信号， 所述控 制模块根据所述短路信号， 断开所述栅极驱动模块的第一输入端口与第一时 钟信号的连接、和所述栅极驱动模块的第二输入端口与第二时钟信号的连接。
4、根据权利要求 3所述的栅极驱动电路， 其特征在于， 所述检测模块包 括减法子模块和取绝对值子模块，
所述减法子模块具有第一输入端口和第二输入端口， 所述减法子模块的 第一输入端口连接所述栅极驱动模块的第一输入端口， 所述减法子模块的第 二输入端口连接所述栅极驱动模块的第二输入端口， 对所述栅极驱动模块的 第一输入端口和所述栅极驱动模块的第二输入端口的输入信号做差值， 所述 减法子模块的输出端连接所述取绝对值子模块， 向所述取绝对值子模块输出 差值信号；
所述取绝对值子模块的输出端连接所述控制模块， 对接收到的所述差值 信号取绝对值， 当所述绝对值小于预设值时， 向所述控制模块发送短路信号。
5、根据权利要求 4所述的栅极驱动电路， 其特征在于， 所述减法子模块 包括：
第一电阻、 第二电阻、 第三电阻、 第四电阻和第一运算放大器； 所述第一电阻的第一端连接所述减法子模块的第一输入端口， 所述第一 电阻的第二端连接所述第一运算放大器的反相输入端；
所述第二电阻的第一端连接所述减法子模块的第二输入端口， 所述第二 电阻的第二端连接所述第一运算放大器的同相输入端；
所述第三电阻的第一端连接所述第一运算放大器的反相输入端， 所述第 三电阻的第二端连接所述第一运算放大器的输出端；
所述第四电阻的第一端连接所述第一运算放大器的反相输入端， 所述第 四电阻的第二端接地； 以及
所述第一运算放大器的输出端连接所述减法子模块的输出端；
其中， 所述第一电阻的阻值与所述第二电阻的阻值相等， 所述第三电阻 的阻值与所述第四电阻的阻值相等。
6、根据权利要求 5所述的栅极驱动电路， 其特征在于， 所述取绝对值子 模块包括：
第一二极管、 第五电阻、 第六电阻和第二运算放大器，
所述第一二极管的输入端连接所述取绝对值子模块的输入端， 所述第一 二极管的输出端连接所述取绝对值子模块的输出端；
所述第五电阻的第一端连接所述取绝对值子模块的输入端， 所述第五电 阻的第二端连接所述第二运算放大器的反相输入端；
所述第六电阻的第一端连接所述第二运算放大器的反相输入端， 所述第 六电阻的第二端连接所述取绝对值子模块的输出端； 以及
所述第二运算放大器的同相输入端接地， 所述第二运算放大器的输出端 连接所述取绝对值子模块的输出端；
其中， 所述第五电阻的阻值与所述第六电阻的阻值相等。
7、根据权利要求 6所述的栅极驱动电路， 其特征在于， 所述控制模块包 括第一开关管和第二开关管，
所述第一开关管和所述第二开关管的栅极连接所述取绝对值子模块的输 出端，
所述第一开关管的第一端连接所述第一时钟信号， 所述第一开关管的第 二端连接所述栅极驱动模块的第一信号输入端；
所述第二开关管的第一端连接所述第二时钟信号， 所述第二开关管的第 二端连接所述栅极驱动模块的第二信号输入端。
8、根据权利要求 7所述的栅极驱动电路， 其特征在于， 所述第一开关管 和所述第二开关管为薄膜晶体管。
9、根据权利要求 7所述的栅极驱动电路， 其特征在于， 所述第一开关管 和所述第二开关管为 N型薄膜晶体管。
10、 一种阵列基板， 其特征在于， 包括权利要求 1-8任一项所述的栅极 驱动电路。
PCT/CN2013/078902 2013-04-25 2013-07-05 栅极驱动电路和阵列基板 WO2014173020A1 (zh)

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