WO2015176349A1 - 一种扫描驱动电路及液晶显示装置 - Google Patents

一种扫描驱动电路及液晶显示装置 Download PDF

Info

Publication number
WO2015176349A1
WO2015176349A1 PCT/CN2014/080724 CN2014080724W WO2015176349A1 WO 2015176349 A1 WO2015176349 A1 WO 2015176349A1 CN 2014080724 W CN2014080724 W CN 2014080724W WO 2015176349 A1 WO2015176349 A1 WO 2015176349A1
Authority
WO
WIPO (PCT)
Prior art keywords
pull
controllable switch
coupled
module
control
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2014/080724
Other languages
English (en)
French (fr)
Inventor
戴超
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TCL China Star Optoelectronics Technology Co Ltd
Original Assignee
Shenzhen China Star Optoelectronics Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenzhen China Star Optoelectronics Technology Co Ltd filed Critical Shenzhen China Star Optoelectronics Technology Co Ltd
Priority to US14/411,107 priority Critical patent/US9530372B2/en
Publication of WO2015176349A1 publication Critical patent/WO2015176349A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—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
    • 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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0404—Matrix technologies
    • G09G2300/0408—Integration of the drivers onto the display substrate
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/06—Details of flat display driving waveforms
    • 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
    • G09G2310/08—Details of timing specific for flat panels, other than clock recovery

Definitions

  • the present invention relates to the field of displays, and more particularly to a scan driving circuit and a liquid crystal display device.
  • the existing GOA circuit uses the current scan line G(N) of the current GOA circuit to start the work of the next-level GOA circuit, which has a certain influence on G(N), so that there is a signal fluctuation. This has an adverse effect on the operation of the current scan line and the startup of the next stage GOA circuit, and even affects the stability of the entire GOA circuit.
  • the technical problem to be solved by the present invention is to provide a scan driving circuit and a liquid crystal display device which are capable of improving the stability of a GOA circuit.
  • the scan driving circuit includes a pull-up module, a pull-up control module for driving the pull-up module, a pull-down maintaining module, and a reference low-level signal; an output end of the pull-up module is coupled to the current scan line; The output of the pull-up control module and the current scan line are coupled to the reference low level signal by a pull-down maintenance module; the scan drive circuit further includes a pull-down sustain signal coupled to the pull-down maintenance module Control terminal
  • the scan driving circuit further includes a downlink module, and a control end of the downlink module is connected to an output end of the pull-up control module, and is connected to a control end of the pull-up module, and the downlink module is The output outputs the current downlink signal.
  • An input end of the pull-up module is coupled to a clock scanning signal, a control end of the pull-up module is coupled to an output end of the pull-up control module, and a control end of the pull-up control module is coupled to a pull-up control signal;
  • An input of the downlink module is coupled to the clock scan signal.
  • the pull-down maintaining module includes a first pull-down maintaining module and a second pull-down maintaining module; the input ends of the first pull-down maintaining module and the second pull-down maintaining module are coupled to an output end of the pull-up control module
  • the control terminals of the first pull-down maintaining module and the second pull-down maintaining module are coupled to the pull-down sustain signal, and the outputs of the first pull-down maintaining module and the second pull-down maintaining module are coupled to the reference low power Flat signal
  • the scan driving circuit further includes a switch, the switch is connected between the control end of the first pull-down maintaining module and the control end of the second pull-down maintaining module, and the control end of the switch is coupled to the Pulling up the output of the control module;
  • the switch switch When the current scan line is in the working time, the switch switch turns off the first pull-down maintaining module and the second pull-down maintaining module, thereby lowering the output of the pull-up control module, the current scan line and the reference The level signal is disconnected.
  • the pull-down maintaining module includes a first pull-down maintaining module, and the first pull-down maintaining module includes a first pull-down maintaining unit, and driving a first pull-down maintaining control unit of the first pull-down maintaining unit;
  • the first pull-down maintaining unit includes a first controllable switch and a second controllable switch, the pull-down sustain signal includes a first pull-down sustain signal, and the first pull-down sustain signal is maintained by the first pull-down control unit And a control terminal coupled to the first controllable switch and the second controllable switch; an output of the pull-up control module coupled to the reference low level signal by the second controllable switch, the current scan a line coupled to the reference low level signal by the first controllable switch;
  • the downlink module includes a nineteenth controllable switch, and a control end of the nineteenth controllable switch is connected to an output end of the pull-up control module, and is connected to a control end of the pull-up module.
  • An input end of the nineteenth controllable switch is coupled to the clock scan signal, and an output end of the nineteenth controllable switch outputs a current downlink signal;
  • the first pull-down maintaining unit further includes a seventh controllable switch, and a control end of the seventh controllable switch is coupled to the control ends of the first controllable switch and the second controllable switch, and the seventh An input end of the control switch is coupled to an output end of the nineteenth controllable switch, and an output end of the seventh controllable switch is coupled to the reference low level signal;
  • the first pull-down maintaining control unit controls the first controllable switch, the second controllable switch, and the seventh controllable switch to be turned on according to the first pull-down maintaining signal, where the current scan line is in the non-working time, a first controllable switch connects the current scan line with a reference low level signal, the second controllable switch connects an output of the pull up control module with a reference low level signal, and the seventh controllable switch An output end of the nineteenth controllable switch is connected to the reference low level signal;
  • the first pull-down maintaining control unit controls the first controllable switch and the second controllable switch to be disconnected according to the first pull-down maintaining signal, the first controllable switch is Disconnecting a current scan line from a reference low level signal, the second controllable switch disconnecting an output of the pull up control module from a reference low level signal, the seventh controllable switch Disconnecting the output of the nineteenth controllable switch from the reference low level signal.
  • the seventh controllable switch can be set to timely discharge the residual charge of the output end of the nineteenth controllable switch through the reference low level signal, thereby ensuring the stability of the downlink signal, and then improving the operation of the next level scan line.
  • the first pull-down maintenance control unit includes a third controllable switch, a fourth controllable switch, and a fifth controllable switch;
  • the pull-down maintenance signal further includes a second logic opposite to the first pull-down sustain signal Pulling down a sustain signal;
  • the third controllable switch adopts a diode connection, an input end and a control end of the third controllable switch are coupled to the first pull-down sustain signal, and an output end of the third controllable switch a control end coupled to the fourth controllable switch;
  • a control end of the fourth controllable switch coupled to an output of the third controllable switch, an input end of the fourth controllable switch coupled to the a first pull-down sustaining signal, an output end of the fourth controllable switch being coupled to a control end of the first controllable switch and the second controllable switch;
  • a control end of the fifth controllable switch coupled to the a second pull-down sustain signal, an input end of the fifth controllable switch coupled to the first pull-down
  • the pull-down maintaining module further includes a shutdown unit, the shutdown unit includes a sixth controllable switch, and a control end of the sixth controllable switch is coupled to an output end of the pull-up control module, An input end of the sixth controllable switch is coupled to a control end of the fourth controllable switch, and an output end of the sixth controllable switch is coupled to the reference low level signal.
  • the pull-down maintaining module further includes a shutdown unit, the shutdown unit includes a sixth controllable switch, and a control end of the sixth controllable switch is coupled to an output end of the pull-up control module, An input end of the sixth controllable switch is coupled to a control end of the fourth controllable switch, and an output end of the sixth controllable switch is coupled to the second pull-down sustain signal.
  • the shutdown unit includes a sixth controllable switch, and a control end of the sixth controllable switch is coupled to an output end of the pull-up control module, An input end of the sixth controllable switch is coupled to a control end of the fourth controllable switch, and an output end of the sixth controllable switch is coupled to the second pull-down sustain signal.
  • the pull-down maintaining module further includes a second pull-down maintaining module, where the second pull-down maintaining module includes a second pull-down maintaining unit, a second pull-down maintaining control unit that drives the second pull-down maintaining unit, and the pull-down maintaining signal is further
  • the second pull-down sustain signal is opposite to the first pull-down sustain signal;
  • the second pull-down maintaining unit includes an eighth controllable switch and a ninth controllable switch; and the second pull-down sustain signal is coupled by the second pull-down sustain control unit And a control terminal of the eighth controllable switch and the ninth controllable switch;
  • the current scan line is coupled to the reference low level signal by the eighth controllable switch, and an output end of the pull-up control module
  • the first ninth controllable switch is coupled to the reference low level signal;
  • the current scan line is in a non-working time, the first pull-down maintaining unit and the second pull-down maintaining unit are alternately turned on, when the second pull-down is maintained When the unit is turned on, the eighth controllable
  • the first pull-down maintaining unit and the second pull-down maintaining unit are both disconnected, the first controllable switch, the second controllable switch, the eighth controllable switch, and the ninth controllable
  • the switch is turned off, disconnecting the output of the pull-up control module from the reference low level signal, and disconnecting the current scan line from the reference low level signal.
  • the pull-down maintenance module is set to two groups, and the switching operation of the module can be maintained by two sets of pull-downs, so that one of the groups can be in a negative pressure recovery state for half of the time, avoiding the single__group pull-down maintenance module working for too long, wherein the TFT is opened.
  • the state and the off-state potential change causing the pull-down maintenance module to be turned on when the conduction is not good, and when it is necessary to turn off, it cannot be completely turned off, which makes the stability of the GOA circuit better.
  • the second pull-down maintenance control unit further includes a tenth controllable switch, an eleventh controllable switch, and a twelfth controllable switch;
  • the tenth controllable switch adopts a diode connection, and the tenth An input end and a control end of the control switch are coupled to the second pull-down sustain signal, and the output of the tenth controllable switch The end is coupled to the control end of the eleventh controllable switch;
  • the control end of the eleventh controllable switch is coupled to the output end of the tenth controllable switch, and the input end of the eleventh controllable switch And coupled to the second pull-down maintaining signal, an output end of the eleventh controllable switch is coupled to a control end of the eighth controllable switch and the ninth controllable switch; and control of the twelfth controllable switch An end coupled to the first pull-down sustain signal, an input of the twelfth controllable switch coupled to the second pull-down sustain signal, and an output of
  • the tenth controllable switch, the eleventh controllable switch, and the twelfth controllable switch are in accordance with the first pull-down sustain signal when the current scan line is in the non-working time, and the second pull-down maintaining module is turned on. And a second pull-down sustain signal, controlling the eighth controllable switch and the ninth controllable switch to be turned on, connecting an output end of the pull-up control module to a reference low level signal, and the current scan line and the reference Low level signal is connected.
  • the reference low level signal includes a first reference low level signal and a second reference low level signal; a potential of the second reference low level signal is lower than the first reference low level signal, a potential of the low level of the pull-down sustain signal is lower than a potential of the second reference low level; the current scan line is coupled to the second reference low level signal by the eighth controllable switch An output of the pull-up control module is coupled to the first reference low level signal by the ninth controllable switch;
  • the eighth controllable switch and the ninth controllable switch are turned on, and the eighth controllable switch turns the current scan line and The first reference low level signal is in communication, and the ninth controllable switch communicates the output of the pull up control module with the second reference low level signal.
  • the pull-down maintaining module further includes a shutdown unit, the shutdown unit includes a sixth controllable switch, and a thirteenth controllable switch;
  • the reference low level signal includes a first reference low level signal and a second reference low level signal; a potential of the second reference low level signal is lower than the first reference low level signal, and a low level potential of the pull down sustain signal is lower than the second reference low level a flat potential;
  • the current scan line is coupled to the first reference low level signal by the eighth controllable switch, and an output of the pull up control module is coupled to the Second reference low level letter
  • An input end of the thirteenth controllable switch is coupled to the control ends of the eighth controllable switch and the ninth controllable switch, and an output end of the thirteenth controllable switch is coupled to the first reference a level signal or a second reference level signal or a second pull-down sustain signal; and an output of the first controllable switch is coupled to the first reference low level signal, the second controllable switch, seventh An output of the controllable switch
  • the sixth controllable switch and the thirteenth controllable switch assist in lowering the potential of the control end of the fourth controllable switch and the control end of the eleventh controllable switch, which helps to lower the first The control terminals of the control switch and the second controllable switch and the potentials of the control terminals of the eighth controllable switch and the ninth controllable switch, thereby turning off the pull-down maintenance module, so as to prevent the pull-down of the pull-down maintenance module from affecting the output of the GOA circuit.
  • the second pull-down maintaining unit further includes a fourteen controllable switch; the control end of the fourteenth controllable switch is coupled to the control ends of the eighth controllable switch and the ninth controllable switch, An input end of the fourteenth controllable switch is coupled to an output end of the nineteenth controllable switch, and an output end of the fourteenth controllable switch is coupled to the reference low level signal;
  • the pull-down maintaining module further includes a switch, a control end of the switch is coupled to an output end of the pull-up control module, and the switch is disposed at a control end of the first controllable switch and the second controllable switch Between the controllable end of the eighth controllable switch and the ninth controllable switch;
  • the switch When the current scan line is in the working time, the switch is turned on, thereby connecting the first pull-down maintaining unit and the control end of the second pull-down maintaining unit, the first pull-down maintaining unit and the second pull-down maintaining One end of the control terminal of the unit is at a low potential, and the other end of the high potential is pulled low, thereby turning off the pull-down maintaining unit and the second pull-down maintaining unit.
  • the pull-up control module includes a seventeenth controllable switch; an output end of the seventeenth controllable switch is coupled to a control end of the pull-up module, and a control end of the seventeenth controllable switch Coupled in the upper stage downlink signal, the input end of the seventeenth controllable switch is coupled to the upper level scan line or the upper stage downlink signal;
  • the pull up module includes an eighteenth controllable switch, the tenth The control end of the eight controllable switch is coupled to the output of the pull-up control module, the input of the eighteen controllable switch is coupled to a clock scan signal, and the output of the eighteen controllable switch is coupled to the current a scan line;
  • the scan driving circuit further includes a pull-down module, where the pull-down module includes a twentieth controllable switch and a twenty-first controllable switch, and the twentieth controllable switch and the twenty-first controllable switch a control end coupled to the lower level scan line; an input end of the twentieth controllable
  • a liquid crystal display device comprising a scan driving circuit according to any one of the inventions.
  • the current GOA circuit uses the current scan line G(N) of the current GOA circuit to start the operation of the next-level GOA circuit G(N+2), and since the current scan line is used to drive the gate line, At the same time, as the start signal of the next GOA circuit, this makes the signal unstable, which has a certain influence on the output of the GOA circuit, and then affects the display effect; the present invention is synchronized with the current scan line due to the addition of the downlink module. A downlink signal is generated, and the downlink signal is independently used for starting the next-level GOA circuit, so that the current scan line G(N) can be stably operated, and at the same time, there is a problem in the current scan line G(N). At the time, it will not affect the work of the lower level GOA, enhance The stability of the GOA circuit improves the operation of the GOA circuit
  • FIG. 1 is a schematic diagram of a scan driving circuit of the present invention
  • Embodiment 1 of a scan driving circuit according to the present invention is a schematic diagram of Embodiment 1 of a scan driving circuit according to the present invention
  • Embodiment 2 of a scan driving circuit according to the present invention is a schematic diagram of Embodiment 2 of a scan driving circuit according to the present invention.
  • Embodiment 3 is a schematic diagram of Embodiment 3 of a scan driving circuit of the present invention.
  • Embodiment 4 is a schematic diagram of Embodiment 4 of a scan driving circuit of the present invention.
  • FIG. 6 is a first schematic view of a fifth embodiment of a scan driving circuit according to the present invention.
  • FIG. 7 is a second schematic view of a fifth embodiment of a scan driving circuit according to the present invention.
  • Embodiment 8 is a third schematic diagram of Embodiment 5 of a scan driving circuit according to the present invention.
  • Embodiment 9 is a fourth schematic diagram of Embodiment 5 of a scan driving circuit according to the present invention.
  • FIG. 10 is a first schematic view of a sixth embodiment of a scan driving circuit according to the present invention.
  • FIG. 11 is a second schematic view of a sixth embodiment of a scan driving circuit according to the present invention.
  • FIG. 12 is a third schematic diagram of Embodiment 6 of a scan driving circuit according to the present invention.
  • FIG. 13 is a schematic diagram of Embodiment 7 of a scan driving circuit according to the present invention.
  • FIG. 14 is a first signal waveform diagram of Embodiment 7 of a scan driving circuit of the present invention.
  • FIG. 15 is a second signal waveform diagram of Embodiment 7 of a scan driving circuit according to the present invention.
  • Embodiment 8 of a scan driving circuit according to the present invention.
  • Embodiment 8 of the present invention is a signal waveform diagram of Embodiment 8 of the present invention.
  • Figure 18 is a schematic view of a liquid crystal display device of the present invention.
  • the scan driving circuit 1 includes a pull-up module 200, a pull-up control module 100 for driving the pull-up module 200, a pull-down maintaining module 10, and a reference low level signal.
  • the output end of the pull-up module 200 is coupled to the current scan line G(N)
  • the input end of the pull-up module 200 is coupled to the clock scan signal CK
  • the control end of the pull-up module 200 is coupled to the output of the pull-up control module 100.
  • the terminal Q(N); the control terminal of the pull-up control module 100 is coupled to the pull-up control signal ST(N-2)/G(N-2), and the pull-up control signal includes the upper scan line G(N-2) and the upper stage Down signal STXN-2); the output terminal Q(N) of the pull-up control module 100 and the current scan line G(N) are coupled to the reference low level signal VSS through the pull-down maintaining module 10; wherein the pull-down is maintained
  • the input terminal of the module 10 is coupled to the output terminal Q(N) of the pull-up control module 100, and the output terminal of the pull-down maintaining module 10 is coupled to the reference low level signal VSS.
  • the scan driving circuit further includes a pull-down sustain signal LC, which is maintained by pull-down.
  • the signal LC is coupled to the control terminal of the pull-down maintenance module 10;
  • the scan driving circuit as described above further includes a downlink module 300.
  • the control terminal of the downlink module 300 is connected to the output terminal Q(N) of the pull-up control module 100, and is connected to the control terminal of the pull-up module 200, and is transmitted downstream.
  • the input of the module 300 is coupled to the clock scan signal CK, and the output of the downstream module 300 outputs the current down signal ST(N).
  • the scan driving circuit as described above further includes a pull-down module 400.
  • the input terminals of the pull-down module 400 are respectively coupled to the current scan line G(N) and the output terminal Q(N) of the pull-up control module 100, and the control terminal of the pull-down module 400 is coupled.
  • the output of the pull-down module 400 is coupled to the reference low level signal VSS.
  • the pull-down sustain signal LC as described above is a periodic signal generated by the timing control circuit or other circuits, and the voltage of the pull-down sustain signal LC is lower than the reference low-level signal VSS when it is at a low level (logic 0).
  • the scan driving circuit as described above further includes a storage capacitor Cb.
  • the first end of the storage capacitor Cb is coupled to the output terminal Q(N) of the pull-up control module 100, and the second end of the storage capacitor Cb is coupled to the pull-up.
  • the output of module 200 and pull-down maintain module 10.
  • the current GOA circuit uses the current scan line G(N) of the current GOA circuit to start the operation of the next-level GOA circuit G(N+2), and since the current scan line is used to drive the gate line, At the same time, as the start signal of the next GOA circuit, which makes the signal unstable, for GOA The output of the road has a certain influence, which in turn affects the display effect.
  • the present invention adds a downlink module, and the downlink module generates a downlink signal synchronously with the current scan line, and the downlink signal is independently used for the next-level GOA circuit G (N).
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • the pull-down maintaining module 10 includes a first pull-down maintaining module 600 and a second pull-down maintaining module 700; a first pull-down maintaining module 600 and a second pull-down maintaining module 700.
  • the input end is coupled to the output terminal Q(N) of the pull-up control module 100, and the control terminals of the first pull-down maintaining module 600 and the second pull-down maintaining module 700 are coupled to the pull-down sustain signal LC, the first pull-down maintaining module 600 and
  • the output of the second pull-down maintaining module 700 is coupled to the reference low level signal VSS.
  • the scan driving circuit further includes a switch T55 connected to the control end of the first pull-down maintaining module 600 and the second pull-down maintaining module 700. Between the control terminals, the control end of the switch T55 is coupled to the output terminal Q(N) of the pull-up control module 100;
  • the switch T55 turns off the first pull-down maintaining module 600 and the second pull-down maintaining module 700, so that the output terminal Q(N) of the pull-up control module 100, the current scan The line G(N) is disconnected from the reference low level signal VSS.
  • the switch T55 is configured to turn off the first pull-down maintaining module 600 and the second pull-down maintaining module 700 when the scan line G(N) is in the working time, so as to prevent the pull-down function from still working during the working time, so that Q ( The voltage at point N) does not rise and the GOA circuit fails.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • the first pull-down maintaining module 600 includes a first pull-down maintaining unit 610 and a first driving the first pull-down maintaining unit 610.
  • Pull-down sustain control unit 620 includes a first controllable switch T32 and a second controllable switch T42, the pull-down sustain signal LC includes a first pull-down sustain signal LC1, and the first pull-down sustain signal LC1 passes
  • the first pull-down maintenance control unit 620 is coupled to the first controllable switch T32 and the second controllable switch
  • the control terminal of T42; the current scan line G(N) is coupled to the reference low level signal VSS through the first controllable switch T32, and the output terminal Q(N) of the pull-up control module 100 is coupled to the reference via the second controllable switch T42.
  • Low level signal VSS Low level signal VSS;
  • the downlink module 300 as described above includes a nineteenth controllable switch T22.
  • the control end of the nineteenth controllable switch T22 is connected to the output terminal Q(N) of the pull-up control module 100, and is connected to the pull-up module 200.
  • the control end of the nineteenth controllable switch T22 is coupled to the clock scan signal CK, and the output of the nineteenth controllable switch T22 outputs the current downlink signal ST(N); and the first pull-down maintaining unit 610 further
  • the control end including the seventh controllable switch T72 is coupled to the control ends of the first controllable switch T32 and the second controllable switch T42, and the input end of the seventh controllable switch T72 is coupled to the output end of the nineteenth controllable switch T22
  • the output of the seventh controllable switch ⁇ 2 is coupled to the reference low level signal VSS;
  • the current scan line G(N) is in the non-working time, and the first pull-down maintenance control unit 620 controls the first controllable switch T32, the second controllable switch ⁇ 42, and the seventh controllable switch ⁇ 72 according to the first pull-down maintaining signal LC1.
  • the first controllable switch ⁇ 32 connects the current scan line G(N) with the reference low level signal VSS
  • the second controllable switch T42 connects the output end of the pull-up control module 100 with the reference low level signal VSS.
  • the seventh controllable switch T72 connects the output end of the nineteenth controllable switch T22 with the reference low level signal VSS; the current scan line G(N) is in the working time, and the first pull-down maintenance control unit 620 is based on the first
  • the pull-up maintaining signal LC1 controls the first controllable switch T32 and the second controllable switch T42 to be disconnected, and the first controllable switch T32 disconnects the connection between the current scan line G(N) and the reference low-level signal VSS, and the second The control switch T42 disconnects the output terminal Q(N) of the pull-up control module 100 from the reference low-level signal VSS, and the seventh controllable switch T72 sets the output end of the nineteenth controllable switch T22 with the reference low level.
  • the communication of the signal VSS is broken.
  • the seventh controllable switch T72 is set to timely discharge the residual charge of the output end of the nineteenth controllable switch T22 through the reference low level signal VSS, thereby ensuring the stability of the downlink signal, and then improving the scan line of the next stage. jobs.
  • the first pull-down maintenance control unit 620 as described above includes a third controllable switch T51, a fourth controllable switch ⁇ 53, and a fifth controllable switch ⁇ 54; the pull-down sustain signal LC further includes a logic opposite to the first pull-down sustain signal LC1 The second pull-down sustain signal LC2; the third controllable switch T51 is diode-connected, third The input end and the control end of the controllable switch T51 are coupled to the first pull-down maintaining signal LC1, and the output end of the third controllable switch T51 is coupled to the control end of the fourth controllable switch T53, and can also be coupled to the first controllable switch a control end of the T32 and the second controllable switch T42; a control end of the fourth controllable switch T53 is coupled to the output end of the third controllable switch T51, and an input end of the fourth controllable switch T53 is coupled to the first pull-down sustain signal At the same time, LC1 is coupled to the second pull-down
  • the pull-down maintaining module 10 as described above includes a second pull-down maintaining module 700, and the second pull-down maintaining module 700 includes a second pull-down maintaining unit 710, a second pull-down maintaining control unit 720 that drives the second pull-down maintaining unit 710, and a pull-down sustaining signal LC.
  • a second pull-down sustain signal LC2 that is logically opposite to the first pull-down sustain signal LC1 is further included;
  • the second pull-down maintaining unit 710 includes an eighth controllable switch T33 and a ninth controllable switch T43; and the second pull-down sustain signal LC2 passes through the second
  • the pull-down maintenance control unit 720 is coupled to the control terminals of the eighth controllable switch T33 and the ninth controllable switch T43;
  • the current scan line G(N) is coupled to the reference low level signal VSS through the eighth controllable switch T33, and the pull-up control
  • the output terminal Q(N) of the module 100 is coupled to the reference low level signal VSS through the ninth controllable switch T43;
  • the current scan line G(N) is in the non-working time, the first pull-down maintaining unit 610 and the second pull-down maintaining unit 710 are alternately turned on, and when the second pull-down maintaining unit 710 is turned on, the eighth controllable switch T33 and the The nine controllable switch T43 is turned on, and the output end of the pull-up control module 100 is connected to the reference low level signal VSS, and the current scan line G(N) is connected to the reference low level signal VSS;
  • the first pull-down maintaining unit 610 and the second pull-down maintaining unit 710 are both disconnected, and the first controllable switch T32, the second controllable switch ⁇ 42, and the eighth controllable switch ⁇ 33 Disconnected from the ninth controllable switch ⁇ 43, disconnecting the output terminal Q(N) of the pull-up control module 100 from the reference low level signal VSS, and the current scan line G(N) and the reference low level signal VSS. The disconnection is broken.
  • the pull-down maintenance module is set in two groups, and the switching operation of the module can be maintained by two sets of pull-downs, so that one of the groups can be Half of the time is in the negative pressure recovery state, avoiding the single _ _ group pull-down maintenance module working too long, and the TFT's on-state and off-state potential changes, causing the pull-down maintenance module to be turned on when the conduction is not smooth, and When it is necessary to turn off, it cannot be completely turned off.
  • the second pull-down maintenance control unit 720 as described above includes a tenth controllable switch T61, an eleventh controllable switch ⁇ 63 and a twelfth controllable switch ⁇ 64; the tenth controllable switch T61 adopts a diode connection method, and the tenth controllable The input end and the control end of the switch T61 are coupled to the second pull-down sustain signal LC2, and the output end of the tenth controllable switch T61 is coupled to the control end of the eleventh controllable switch ⁇ 63, which can be coupled to the eighth controllable switch ⁇ 33 and a control end of the nine controllable switch ⁇ 43; a control end of the eleventh controllable switch ⁇ 63 is coupled to an output end of the tenth controllable switch T61, and an input end of the eleventh controllable switch ⁇ 63 is coupled to the second pull-down sustain signal LC2, At the same time, coupled to the first pull-down maintaining signal LC1, the output end of the eleventh control
  • the tenth controllable switch T61, the eleventh controllable switch ⁇ 63 and the twelfth controllable switch ⁇ 64 are according to the first pulldown.
  • the sustain signal LC1 and the second pull-down sustain signal LC2 control the eighth controllable switch ⁇ 33 and the ninth controllable switch ⁇ 43 to be turned on, and connect the output terminal of the pull-up control module 100 with the reference low-level signal VSS, the current scan line G (N) is in communication with the reference low level signal VSS.
  • the pull-down maintenance module 10 as described above includes a shutdown unit 900 including control of a sixth controllable switch T52 and a thirteenth controllable switch T62, a sixth controllable switch T52 and a thirteenth controllable switch T62 The end is coupled to the output terminal Q(N) of the pull-up control module 100, the input end of the sixth controllable switch T52 is coupled to the control end of the fourth controllable switch T53, and the input end of the thirteenth controllable switch is coupled to the tenth The control end of the controllable switch T63; the output end of the sixth controllable switch T52 is coupled to the reference low level signal VSS or the second pull down sustain signal LC2, and the output end of the thirteenth controllable switch T62 is coupled to the reference low level Signal VSS or first pull-down sustain signal LC1.
  • T52 and T62 assisted to pull down the fourth controllable opening Turning off the potential at the control terminal S(N) of T53 and the control terminal T(N) of the eleventh controllable switch T63, which helps to pull down the control terminals of the first controllable switch ⁇ 32 and the second controllable switch ⁇ 42 ⁇ ( ⁇ ) and the potential of the control terminal ⁇ ( ⁇ ) of the eighth controllable switch ⁇ 33 and the ninth controllable switch ⁇ 43, thereby turning off the pull-down sustaining module, so as to prevent the pull-down of the pull-down maintaining module from affecting the output of the GOA circuit.
  • the control terminals of the first controllable switch, the second controllable switch, the eight controllable switch, and the ninth controllable switch Since the low level of the first pull-down sustain signal LC1 is lower than the first reference low level signal, the control terminals of the first controllable switch, the second controllable switch, the eight controllable switch, and the ninth controllable switch The potential difference Vgs ⁇ 0 between the output and the output terminal is in a more negative off state, which can better prevent leakage.
  • the second pull-down maintaining unit 710 as described above includes a fourteenth controllable switch T73; the control end of the fourteenth controllable switch T73 is coupled to the control end of the eighth controllable switch T33 and the ninth controllable switch T43, tenth
  • the input end of the four controllable switch T73 is coupled to the output end of the nineteenth controllable switch T22, and the output end of the fourteenth controllable switch is coupled to the reference low level signal VSS;
  • the current scan line G(N) is in the working time, the second pull-down maintaining unit 710 is turned off, the fourteenth controllable switch T73 is turned off, and the output end of the nineteenth controllable switch T22 and the reference low level signal VSS are Disconnected.
  • the pull-down maintaining module 10 as described above includes a balancing unit 800.
  • the balancing unit 800 includes a switching switch T55.
  • the control end of the switching switch T55 is coupled to the output terminal Q(N) of the pull-up control module 100, and the switching switch T55 is disposed at the first
  • the control end of the control switch T32 and the second controllable switch T42 is between the controllable end of the eighth controllable switch T33 and the ninth controllable switch T43;
  • the switch T55 When the current scan line G(N) is in the working time, the switch T55 is turned on, thereby connecting the control terminals of the first pull-down maintaining unit 610 and the second pull-down maintaining unit 710, the first pull-down maintaining unit 610 and the second The other end of the control terminal of the pull-down maintaining unit 710 is at a low potential, and the other end of the high potential is pulled low, thereby turning off the first pull-down maintaining unit 610 and the second pull-down maintaining unit 710.
  • the switch T55 Setting the switch T55 to balance the potential at both ends, during operation, especially at T52 and T62
  • the potential of the P ( N ) point can be pulled down to the potential of the K (N) point by the switch T55, and the first controllable switch T32, the second controllable switch ⁇ 42, and the eighth controllable switch ⁇ 33
  • the ninth controllable switch ⁇ 43 is turned off to avoid affecting the signals at G(N) and Q(N) due to the incomplete turn-off of the TFT, thereby affecting the output of the GOA circuit.
  • the pull-up control module 100 as described above includes a seventeenth controllable switch T11; the output end of the seventeenth controllable switch T11 is coupled to the control end of the pull-up module 200, and the control end of the seventeenth controllable switch T11 is coupled to The upper stage downlink signal ST(N-2), the input end of the seventeenth controllable switch T11 is coupled to the upper scanning line G(N-2) or the upper stage downlink signal STXN-2); the pull-up module 200 includes the eighteenth The controllable switch T21, the control end of the eighteenth controllable switch T21 is coupled to the output terminal Q(N) of the pull-up control module 100, and the input end of the eighteenth controllable switch T21 is coupled to the clock scan signal CK, the eighteenth The output of the controllable switch T21 is coupled to the current scan line G(N); the scan drive circuit further includes a pull-down module 400, and the pull-down module 400 includes a twentieth controllable switch T31 and a
  • the reference low level signal VSS as described above includes the first reference low level signal VSS 1 and the second reference low level signal VSS2; the potential of the second reference low level signal VSS2 is lower than the first reference low level signal VSS1 When the low level of the pull-down sustain signal LC is lower than the potential of the second reference low level VSS2; the current scan line G(N) is coupled to the first reference low level signal VSS1 through the eighth controllable switch T33, and the pull-up control
  • the output terminal Q(N) of the module 100 is coupled to the second reference low level signal VSS2 through the ninth controllable switch T43; in addition, the input end of the sixth controllable switch T52 is coupled to the control end of the fourth controllable switch T53.
  • the input end of the sixth controllable switch T52 can also be coupled to the first controllable switch T32 and the second controllable
  • the control end of the thirteenth controllable switch T62 is coupled to the control end of the eleventh controllable switch T63.
  • the input end of the thirteenth controllable switch T62 can also be coupled to the eighth The control terminal of the control switch and the ninth controllable switch;
  • the output of the sixth controllable switch T52 is coupled to the second pull-down sustain signal LC2 or the second reference low-level signal VSS2, of course, the output of the sixth controllable switch T52
  • the first reference low level signal VSS1 can also be coupled to the second reference level signal VSS2 or the first pull down sustain signal LC1.
  • the thirteenth controllable switch The output of T62 can also be coupled to the first reference low level signal VSS1; and the outputs of the first controllable switch T32 and the eighth controllable switch T33 are coupled to the first reference low level signal VSS1, the second controllable The outputs of the switch T42, the seventh controllable switch ⁇ 72, the ninth controllable switch ⁇ 43, and the fourteenth controllable switch ⁇ 73 are coupled to the second reference low level signal VSS2.
  • a seventh controllable switch T72 and a fourteen controllable switch T73 are added on the basis of adding the downlink module 300.
  • the reason is that the output of the downlink module is affected by factors such as parasitic capacitance. Fluctuation; in particular, if the charge cannot be drained in time during the non-operation of the current scan line, the unstable downlink signal generated during the current scan line operation will affect the driving of the next-level GOA circuit; After the seventh controllable switch T72 and the fourteenth controllable switch T73, the seventh controllable switch ⁇ 2 and the fourteenth controllable switch T73 can pass the reference low level signal in time during the current scan line operation. The residual charge at the output of the module is drained in time to ensure the stability of the downstream signal, which in turn improves the operation of the next-level scan line.
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • the pull-down maintaining module 10 includes a first pull-down maintaining module 600, and the first pull-down maintaining module includes a first-
  • the pull-down maintaining unit 610 drives the first pull-down maintaining control unit 620 of the first pull-down maintaining unit 610; the first pull-down maintaining unit 610 includes a first controllable switch T32 and a second controllable switch T42, and the pull-down maintaining signal LC includes The first pull-down sustain signal LC1, the first pull-down sustain signal LC1 passes the first pull-down dimension
  • the control unit 620 is coupled to the control terminals of the first controllable switch T32 and the second controllable switch T42; the current scan line G(N) is coupled to the reference low level signal VSS through the first controllable switch T32, and the pull-up control module
  • the output terminal Q(N) of 100 is coupled to the reference low level signal VSS through the second controllable switch T
  • the first pull-down maintenance control unit controls the first controllable switch T32 and the second controllable switch T42 to be turned on according to the first pull-down maintaining signal LC1, and the first controllable switch T32 connects the current scan line G(N) with the reference low level signal VSS, and the second controllable switch T42 connects the output terminal Q(N) of the pull-up control module 100 with the reference low level signal VSS;
  • the first controllable switch T32 and the second controllable switch T42 are disconnected, and the first controllable switch T32 connects the current scan line G(N) with the reference low level signal VSS.
  • the communication is disconnected, and the second controllable switch T42 disconnects the communication between the output terminal Q(N) of the pull-up control module 100 and the reference low level signal VSS.
  • the first pull-down maintenance control unit 620 as described above includes a third controllable switch T51, a fourth controllable switch ⁇ 53, and a fifth controllable switch ⁇ 54; the pull-down sustain signal LC further includes a logic opposite to the first pull-down sustain signal LC1
  • the second pull-down sustain signal LC2; the third controllable switch T51 is diode-connected, the input end and the control end of the third controllable switch T51 are coupled to the first pull-down sustain signal LC1, and the output of the third controllable switch T51
  • the control end coupled to the fourth controllable switch ⁇ 53 is further coupled to the control ends of the first controllable switch ⁇ 32 and the second controllable switch ⁇ 42; the control end of the fourth controllable switch ⁇ 53 is coupled to the third controllable switch T51.
  • the output end of the fourth controllable switch ⁇ 53 is coupled to the first pull-down sustain signal LC1, and the output end of the fourth controllable switch ⁇ 53 is coupled to the control end of the first controllable switch ⁇ 32 and the second controllable switch ⁇ 42
  • the control terminal of the fifth controllable switch 54 is coupled to the second pull-down sustain signal LC2, the input of the fifth controllable switch 54 is coupled to the first pull-down sustain signal LC1, and the output of the fifth controllable switch 54 is coupled to The controllable end of the first controllable switch ⁇ 32 and the second controllable switch ⁇ 42.
  • the pull-down maintaining module 10 as described above includes a turn-off unit 900, and the turn-off unit 900 includes a sixth controllable switch ⁇ 52, and the control end of the sixth controllable switch ⁇ 52 is coupled to the output terminal Q(N) of the pull-up control module 100,
  • the input end of the sixth controllable switch T52 is coupled to the control end of the fourth controllable switch T53, and the output end of the sixth controllable switch T52 is coupled to the reference low level signal VSS or the second pull down sustain signal LC2.
  • the pull-down maintaining module 10 as described above includes a second pull-down maintaining module 700, and the second pull-down maintaining module 700 includes a second pull-down maintaining unit 710, a second pull-down maintaining control unit 720 that drives the second pull-down maintaining unit 710, and a pull-down sustaining signal LC.
  • a second pull-down sustain signal LC2 that is logically opposite to the first pull-down sustain signal LC1 is further included;
  • the second pull-down maintaining unit 710 includes an eighth controllable switch T33 and a ninth controllable switch T43; and the second pull-down sustain signal LC2 passes through the second
  • the pull-down maintenance control unit 720 is coupled to the control terminals of the eighth controllable switch T33 and the ninth controllable switch T43;
  • the current scan line G(N) is coupled to the reference low level signal VSS through the eighth controllable switch T33, and the pull-up control
  • the output terminal Q(N) of the module 100 is coupled to the reference low level signal VSS through the ninth controllable switch T43;
  • the first pull-down maintaining unit 610 and the second pull-down maintaining unit 710 are alternately turned on, and when the second pull-down maintaining unit 710 is turned on, the eighth controllable switch T33 and The ninth controllable switch T43 is turned on, and the output terminal Q(N) of the pull-up control module 100 is connected to the reference low level signal VSS, and the current scan line G(N) is connected to the reference low level signal VSS;
  • the first pull-down maintaining unit 610 and the second pull-down maintaining unit 710 are both turned off, the first controllable switch T32, the second controllable switch ⁇ 42, and the eighth controllable switch ⁇ 33 and the ninth controllable switch ⁇ 43 are disconnected, thereby disconnecting the output terminal Q(N) of the pull-up control module 100 from the reference low-level signal VSS, and the current scan line G(N) and the reference low level.
  • the communication of the signal VSS is broken.
  • the pull-down maintenance module is set to two groups, and the switching operation of the module can be maintained by two sets of pull-downs, so that one of the groups can be in a negative pressure recovery state for half of the time, avoiding the single__group pull-down maintenance module working for too long, and the opening of the module
  • the state and the off-state potential change causing the pull-down maintenance module to be turned on when the conduction is not good, and when it needs to be turned off, it cannot be completely turned off.
  • the second pull-down maintenance control unit 720 as described above includes a tenth controllable switch T61, an eleventh controllable switch ⁇ 63 and a twelfth controllable switch ⁇ 64; the tenth controllable switch T61 adopts a diode connection method, and the tenth controllable The input end and the control end of the switch T61 are coupled to the second pull-down sustain signal LC2, and the output end of the tenth controllable switch T61 is coupled to the control end of the eleventh controllable switch ⁇ 63, which can be coupled to the eighth controllable switch ⁇ 33 and a control end of the nine controllable switch ⁇ 43; a control end of the eleventh controllable switch ⁇ 63 is coupled to an output end of the tenth controllable switch T61, and an input end of the eleventh controllable switch ⁇ 63 is coupled to the second pull-down sustain signal LC2, the output end of the eleventh controllable switch ⁇ 63 is coupled to the control ends of the eighth controll
  • the tenth controllable switch T61, the eleventh controllable switch ⁇ 63 and the twelfth controllable switch ⁇ 64 are according to the first pulldown.
  • the sustain signal LC1 and the second pull-down sustain signal LC2 control the eighth controllable switch ⁇ 33 and the ninth controllable switch ⁇ 43 to be turned on, and connect the output terminal Q(N) of the pull-up control module 100 to the reference low-level signal VSS.
  • the current scan line G(N) is also connected to the reference low level signal VSS.
  • the pull-down maintaining module 10 as described above includes a balancing unit 800.
  • the balancing unit 800 includes a switching switch T55.
  • the control end of the switching switch T55 is coupled to the output terminal Q(N) of the pull-up control module 100, and the switching switch T55 is disposed at the first
  • the control end of the control switch T32 and the second controllable switch T42 is between the controllable end of the eighth controllable switch T33 and the ninth controllable switch T43;
  • the switch T55 When the current scan line G(N) is in the working time, the switch T55 is turned on, thereby connecting the control terminals of the first pull-down maintaining unit 610 and the second pull-down maintaining unit 710, the first pull-down maintaining unit 610 and the second pull-down.
  • the other end of the control terminal of the maintaining unit 710 is at a low potential, and the other end of the high potential is pulled low, thereby turning off the first pull-down maintaining unit 610 and the second pull-down maintaining unit 710.
  • the potential of the P ( N ) point can be pulled down to the K (N) point by the switch T55
  • the potential of the first controllable switch T32, the second controllable switch ⁇ 42, the eighth controllable switch ⁇ 33, and the ninth controllable switch ⁇ 43 are turned off to prevent the G(N) and Q(N) from being completely turned off by the TFT.
  • the signal at the ) affects the output of the GOA circuit.
  • the pull-down maintaining module 10 as described above includes a thirteenth controllable switch T62; the control end of the thirteenth controllable switch T62 is coupled to the output terminal Q(N) of the pull-up control module 100, and the thirteenth controllable switch T62 The input end is coupled to the control end of the eleventh controllable switch T63, the output end of the thirteenth controllable switch T62 is coupled to the reference low level signal VSS; the output end of the thirteenth controllable switch T62 can also be coupled to the first end Pull down dimension Hold the signal LCI.
  • T52 and ⁇ 62 assist in pulling down the potential of the control terminal S(N) of the fourth controllable switch ⁇ 53 and the control terminal T(N) of the eleventh controllable switch T63 to help lower the first
  • the control terminal ⁇ 32 and the control terminal ⁇ ( ⁇ ) of the second controllable switch ⁇ 42 and the potential of the control terminal ⁇ ( ⁇ ) of the eighth controllable switch ⁇ 33 and the ninth controllable switch ⁇ 43 are turned off, thereby turning off the pull-down maintenance module to prevent pull-down
  • the pull-down function of the maintenance module affects the output of the GOA circuit, and since the low level of the first pull-down sustain signal LC1 is lower than the first reference low level signal, the first controllable switch, the second controllable switch,
  • the potential difference Vgs ⁇ 0 between the control terminal and the output terminal of the eight controllable switch and the ninth controllable switch is in a more negative off state, which can better prevent leakage.
  • the first pull-down sustain signal LC1 and the second pull-down sustain signal LC2 as described above are not only the low-level potential is smaller than the reference low-level signal but also the low-frequency signal, the first pull-down sustain signal LC1 and the second pull-down sustain signal LC2
  • the signal switching time selects the blank time between each frame of the screen ( Blacnking Time)b
  • the pull-up control module 100 as described above includes a seventeenth controllable switch Til, and an output end of the seventeenth controllable switch Til is coupled to the control end of the pull-up module 200;
  • the pull-up control signal includes the upper-level scan line G (N- 2) and the superior downlink signal STXN-2), the control end of the seventeenth controllable switch T11 is coupled to the upper downlink signal ST(N-2), and the input terminal is coupled to the upper scanning line G(N-2);
  • the pull module 200 includes an eighteenth controllable switch T21.
  • the control end of the eighteenth controllable switch T21 is coupled to the output terminal Q(N) of the pull-up control module 100, and the input end of the eighteen controllable switch T21 is coupled to the clock.
  • the scan signal CK, the output end of the eighteen controllable switch T21 is coupled to the current scan line G(N);
  • the scan drive circuit further includes a storage capacitor Cb, and the first end of the storage capacitor Cb is coupled to the pull-up control module 100.
  • the output terminal Q(N) and the second end of the storage capacitor Cb are coupled to the output end of the pull-up module 200.
  • the pull-down module 400 as described above includes a twentieth controllable switch T31 and a twenty-first controllable switch T41, and the control ends of the twentieth controllable switch T31 and the twenty-first controllable switch T41 are coupled to the lower scan line G. (N+2); the input end of the twentieth controllable switch T31 is coupled to the current scan line G(N), and the output end of the twentieth controllable switch T31 is coupled to the reference low level signal VSS; The input end of the control switch T41 is coupled to the output end of the pull-up control module 100, and the output end of the twenty-first controllable switch T41 is coupled to the base Quasi-low level signal vss.
  • the scan driving circuit as described above includes a downlink module 300.
  • the control terminal of the downlink module 300 is coupled to the output terminal Q(N) of the pull-up control module 100, and is coupled to the control terminal of the pull-up module 200, and the downstream module.
  • the input of the 300 is coupled to the clock scan signal CK, and the output of the downlink module 300 outputs the current down signal ST(N).
  • the downlink module 300 as described above includes a nineteenth controllable switch T22.
  • the control end of the nineteenth controllable switch T22 is coupled to the output terminal Q(N) of the pull-up control module 100, and is coupled to the pull-up module 200.
  • the control end of the nineteenth controllable switch T22 is coupled to the clock scan signal CK, and the output of the nineteenth controllable switch T22 outputs the current downlink signal ST(N). If the signal at G(N) is used for the driving of the gate line and the driving signal of the next level of GOA, the signal on both sides will be unstable, affecting the output of the GOA circuit, and if a certain gate line is bad. If the line is used, it will have a major impact on the operation of the entire GOA circuit. Therefore, the downlink module 300 is added as one of the driving or driving of the next-level GOA, so that when a bad line occurs in a certain gate line, it will not The GOA circuit has an impact.
  • Embodiment 4 is a diagrammatic representation of Embodiment 4:
  • FIG. 5 is a schematic diagram of Embodiment 4 of the present invention, and FIG. 5 is a developed view of FIG. 1 , wherein the reference low level signal VSS includes a first reference low level signal VSS 1 and a potential lower than the first reference low level signal.
  • the second reference low level signal VSS2 is higher than the pull-down sustain signal.
  • the pull-down maintaining module 10 includes a first pull-down maintaining module 600, and the first pull-down maintaining module includes a first pull-down maintaining unit 610 that drives the first pull-down maintaining unit 610.
  • the signal LC1 is coupled to the control terminals of the first controllable switch T32 and the second controllable switch T42 via a first pull-down maintenance control unit 620;
  • the current scan line G(N) is coupled to the first reference low through the first controllable switch T32 Level signal VSS 1, the output terminal Q (N) of the pull-up control module 100 is coupled to the second reference low level signal VSS2 through the second controllable switch T42;
  • the first pull-down maintenance control unit controls the first controllable switch T32 and the second controllable switch T42 to be turned on according to the first pull-down maintaining signal LC1, and the first controllable switch T32 connects the current scan line G(N)
  • the first controllable switch T32 and the second controllable switch T42 are disconnected, and the first controllable switch T32 connects the current scan line G(N) with the first reference low level signal.
  • the communication of VSS1 is disconnected, and the second controllable switch T42 disconnects the communication between the output terminal Q(N) of the pull-up control module 100 and the second reference low-level signal VSS2.
  • the first pull-down maintenance control unit 620 as described above includes a third controllable switch T51, a fourth controllable switch ⁇ 53, and a fifth controllable switch ⁇ 54; the pull-down sustain signal LC further includes a logic opposite to the first pull-down sustain signal LC1
  • the second pull-down sustain signal LC2; the third controllable switch T51 is diode-connected, the input end and the control end of the third controllable switch T51 are coupled to the first pull-down sustain signal LC1, and the output of the third controllable switch T51
  • the control end coupled to the fourth controllable switch ⁇ 53 is further coupled to the control ends of the first controllable switch ⁇ 32 and the second controllable switch ⁇ 42; the control end of the fourth controllable switch ⁇ 53 is coupled to the third controllable switch T51.
  • the output end of the fourth controllable switch ⁇ 53 is coupled to the first pull-down sustain signal LC1, and the output end of the fourth controllable switch ⁇ 53 is coupled to the control end of the first controllable switch ⁇ 32 and the second controllable switch ⁇ 42
  • the control terminal of the fifth controllable switch 54 is coupled to the second pull-down sustain signal LC2, the input of the fifth controllable switch 54 is coupled to the first pull-down sustain signal LC1, and the output of the fifth controllable switch 54 is coupled to a controllable end of the first controllable switch ⁇ 32 and the second controllable switch ⁇ 42;
  • the first controllable switch T32 and the second controllable switch T42 are turned on, and the first reference is low.
  • the flat signal VSS 1 pulls the potential of the current scan line G(N) low through the first controllable switch, and the second reference low level signal VSS2 pulls up the output terminal Q(N) of the control module 100 through the second controllable switch
  • the potential is pulled low; during the current scan line G (N) working time, the first controllable switch T32 and the second controllable switch T42 are turned off, thereby turning the second reference low level signal VSS2 and the output of the pull-up control module 100
  • the communication of the terminal Q(N) is broken, and the communication of the first reference low level signal VSS1 and the current scanning line G(N) is disconnected.
  • the pull-down maintaining module 10 as described above further includes a sixth controllable switch T52.
  • the control end of the sixth controllable switch T52 is coupled to the output terminal Q(N) of the pull-up control module 100, and the input end of the sixth controllable switch T52.
  • the output of the sixth controllable switch T52 is coupled to the second reference low level signal VSS2 or the second pull down sustain signal LC2.
  • the pull-down maintaining module 10 as described above includes a second pull-down maintaining module 700, and the second pull-down maintaining module 700 includes a second pull-down maintaining unit 710, a second pull-down maintaining control unit 720 that drives the second pull-down maintaining unit 710, and a pull-down sustaining signal LC.
  • a second pull-down sustain signal LC2 that is logically opposite to the first pull-down sustain signal LC1 is further included;
  • the second pull-down maintaining unit 710 includes an eighth controllable switch T33 and a ninth controllable switch T43; and the second pull-down sustain signal LC2 passes through the second
  • the pull-down maintenance control unit 720 is coupled to the control terminals of the eighth controllable switch T33 and the ninth controllable switch T43;
  • the current scan line G(N) is coupled to the first reference low level signal VSS1 through the eighth controllable switch T33.
  • the output terminal Q(N) of the pull control module 100 is coupled to the second reference low level signal VSS2 through the ninth controllable switch T43;
  • the first pull-down maintaining unit 610 and the second pull-down maintaining unit 710 are alternately turned on, and when the second pull-down maintaining unit 710 is turned on, the eighth controllable switch T33 and The ninth controllable switch T43 is turned on, and the output terminal Q(N) of the pull-up control module 100 is connected to the second reference low level signal VSS2, and the current scan line G(N) and the first reference low level signal VSS1 are connected. Connected
  • the first pull-down maintaining unit 610 and the second pull-down maintaining unit 710 are both turned off, the first controllable switch T32, the second controllable switch ⁇ 42, and the eighth controllable switch The ⁇ 33 and the ninth controllable switch ⁇ 43 are disconnected, thereby disconnecting the output terminal Q(N) of the pull-up control module 100 from the second reference low-level signal VSS2, and the current scan line G(N) and the first The communication of the reference low level signal VSS1 is turned off.
  • the pull-down maintenance module is set to two groups, and the switching operation of the module can be maintained by two sets of pull-downs, so that one of the groups can be in a negative pressure recovery state for half of the time, avoiding the single__group pull-down maintenance module working for too long, wherein the TFT is opened.
  • the second pull-down maintenance control unit 720 as described above includes a tenth controllable switch T61, an eleventh controllable switch ⁇ 63 and a twelfth controllable switch ⁇ 64; the tenth controllable switch T61 adopts a diode connection method, and the tenth The input end and the control end of the control switch T61 are coupled to the second pull-down maintaining signal LC2, and the output end of the tenth controllable switch T61 is coupled to the control end of the eleventh controllable switch T63 and can be coupled to the eighth controllable switch T33 and a control end of the ninth controllable switch T43; a control end of the eleventh controllable switch T63 is coupled to an output end of the tenth controllable switch T61, and an input end of the eleventh controllable switch T63 is coupled to the second pull-down sustain signal LC2 The output end of the eleventh controllable switch T63 is coupled to the control end of the eight controllable switch T33 and the ninth controll
  • the current scan line G(N) is in the non-working time
  • the tenth controllable switch T61, the eleventh controllable switch ⁇ 63 and the twelfth controllable switch ⁇ 64 are according to the first pulldown.
  • the sustain signal LC1 and the second pull-down sustain signal LC2 control the eighth controllable switch ⁇ 33 and the ninth controllable switch ⁇ 43 to be turned on, and the output terminal Q(N) of the pull-up control module 100 and the second reference low-level signal VSS2 Connected, the current scan line is further connected to the first reference low level signal VSS1.
  • the pull-down maintaining module 10 as described above further includes a balancing unit 800, the balancing unit 800 includes a switching switch T55, the control end of the switching switch T55 is coupled to the output terminal Q(N) of the pull-up control module 100, and the switching switch T55 is disposed at the first The control end of the controllable switch T32 and the second controllable switch T42 is between the controllable end of the eighth controllable switch T33 and the ninth controllable switch T43;
  • the switch T55 When the current scan line G(N) is in the working time, the switch T55 is turned on, thereby connecting the control terminals of the first pull-down maintaining unit 610 and the second pull-down maintaining unit 710, the first pull-down maintaining unit 610 and the second pull-down.
  • the other end of the control terminal of the maintaining unit 710 is at a low potential, and the other end of the high potential is pulled low, thereby turning off the first pull-down maintaining unit 610 and the second pull-down maintaining unit 710.
  • the potential of the P ( N ) point can be pulled down to the K (N) point by the switch T55
  • the potential of the first controllable switch T32, the second controllable switch ⁇ 42, the eighth controllable switch ⁇ 33, and the ninth controllable switch ⁇ 43 are turned off to prevent the G(N) and Q(N) from being completely turned off by the TFT.
  • the signal at the ) affects the output of the GOA circuit.
  • the pull-down maintaining module 10 as described above includes a thirteenth controllable switch T62; the control end of the thirteenth controllable switch T62 is coupled to the output terminal Q(N) of the pull-up control module 100, and the thirteenth controllable switch T62 The input end is coupled to the control end of the eleventh controllable switch T63, the output end of the thirteenth controllable switch T62 is coupled to the second reference low level signal VSS2; the output of the thirteenth controllable switch T62 can also be coupled to The first pull-down sustain signal LC1.
  • T52 and T62 assist in pulling down the potential at the control terminal S(N) of the fourth controllable switch T53 and the control terminal T(N) of the eleventh controllable switch T63, which helps to pull down the first
  • the control terminal ⁇ 32 and the control terminal ⁇ ( ⁇ ) of the second controllable switch ⁇ 42 and the potential of the control terminal ⁇ ( ⁇ ) of the eighth controllable switch ⁇ 33 and the ninth controllable switch ⁇ 43 are turned off, thereby turning off the pull-down maintenance module, so as to avoid Pull-down of the pull-down maintenance module affects the output of the GOA circuit; and since the second reference low level signal VSS2 and the low level of the first pull-down sustain signal LC1 are lower than the first reference low level signal,
  • the potential difference Vgs ⁇ 0 between the control terminal and the output terminal of the controllable switch, the second controllable switch, the eight controllable switch and the ninth controllable switch is in a more negative off state, which can better prevent leakage.
  • the first pull-down sustain signal LC1 and the second pull-down sustain signal LC2 as described above are not only the low-level potential is smaller than the reference low-level signal but also the low-frequency signal, the first pull-down sustain signal LC1 and the second pull-down sustain signal LC2
  • the signal switching time selects the blank time between each frame of the screen ( Blacnking Time)b
  • the pull-up control module 100 as described above includes a seventeenth controllable switch Ti l , the output end of the seventeenth controllable switch Ti l is coupled to the control end of the pull-up module 200; the pull-up control signal includes the upper-level scan line G ( N-2) and the superior downlink signal STXN-2), the control end of the seventeenth controllable switch T11 is coupled to the upper downlink signal ST(N-2), and the input terminal is coupled to the upper scanning line G(N-2)
  • the pull-up module 200 includes an eighteenth controllable switch T21, and the control end of the eighteenth controllable switch T21 is coupled to the output terminal Q(N) of the pull-up control module 100, and the input end of the eighteen controllable switch T21 is coupled.
  • the output end of the eighteen controllable switch T21 is coupled to the current scan line G(N); the scan drive circuit further includes a storage capacitor Cb, and the first end of the storage capacitor Cb is coupled to the pull-up control module.
  • the output terminal Q(N) of 100 and the second end of the storage capacitor Cb are coupled to the output terminal of the pull-up module 200.
  • the pull-down module 400 as described above includes a twentieth controllable switch T31 and a twenty-first controllable switch T41, The control end of the twentieth controllable switch T31 and the twenty-first controllable switch T41 is coupled to the lower scan line G(N+2); the input end of the twentieth controllable switch T31 is coupled to the current scan line G(N) The output end of the twentieth controllable switch T31 is coupled to the reference low level signal VSS; the input end of the twenty-first controllable switch T41 is coupled to the output end of the pull-up control module 100, and the twenty-first controllable switch T41 The output is coupled to a reference low level signal VSS.
  • Embodiment 5 is a diagrammatic representation of Embodiment 5:
  • FIG. 6 is a first schematic diagram of Embodiment 5 of the present invention.
  • the present embodiment is based on the different settings of the third embodiment and the fourth embodiment of the pull-down maintenance module 10.
  • the main difference is that the first pull-down maintenance control unit 620 includes The third controllable switch T51 and the fifth controllable switch T54, the second pull-down maintenance control unit 720 includes a tenth controllable switch T61 and a twelfth controllable switch T64; a third controllable switch T51 and a tenth controllable switch T61 Using the diode connection method, the control end and the input end of the third controllable switch T51 are coupled to the first pull-down sustain signal LC1, and the control end and the input end of the tenth controllable switch T61 are coupled to the second pull-down sustain signal LC2; The output end of the three controllable switch T51 is coupled to the control end ⁇ ( ⁇ ) of the first controllable switch T32 and the second controllable switch T42
  • the pull-down maintaining module 10 as described above further includes a balancing unit 800, the balancing unit 800 includes a switching switch T55, the control end of the switching switch T55 is coupled to the output terminal Q(N) of the pull-up control module 100, and the switching switch T55 is disposed at the first The control end of the controllable switch T32 and the second controllable switch T42 is between the controllable end of the eighth controllable switch T33 and the ninth controllable switch T43.
  • the switch T55 is set to balance the potential of both ends thereof.
  • the sixth controllable switch T52 and the thirteenth controllable switch T62, P(N) are not provided here.
  • the potential of the point can still be pulled down to the potential of K(N) point by the switch T55, and the first controllable switch T32, the second controllable switch ⁇ 42, the eighth controllable switch ⁇ 33 and the ninth controllable switch ⁇ 43 is turned off to avoid the G(N) due to the TFT not being completely turned off. And the signal at Q(N) affects the output of the GOA circuit.
  • FIG. 7 is a second schematic diagram of Embodiment 5 of the present invention, and FIG. 7 is a modification based on FIG. 6.
  • the main difference is that the first pull-down maintenance control unit 620 further includes a fourth controllable switch T53, and the second pull-down is maintained.
  • the control unit 720 includes an eleventh controllable switch T63; the control end of the fourth controllable switch T53 is coupled to the output end of the third controllable switch T51, and the output end of the fourth controllable switch T53 is coupled to the third controllable switch
  • the output end of the T51 and the controllable end of the first controllable switch T32 and the second controllable switch ⁇ 42, the input end of the fourth controllable switch ⁇ 53 is respectively coupled to the first pull-down maintaining signal LC1 and the second pull-down maintaining signal LC2;
  • the control end of the eleven controllable switch ⁇ 63 is coupled to the output end of the tenth controllable switch T61, and the output ends of the eleventh controllable switch ⁇ 63 are respectively coupled to the output end of the tenth controllable switch T61 and the eighth controllable
  • the control terminal of the switch ⁇ 33 and the ninth controllable switch ⁇ 43, the input terminals of the eleventh controllable switch ⁇ 63 are respectively coupled to the
  • FIG 8 is a third schematic diagram of Embodiment 5 of the present invention.
  • the present embodiment is based on the improvement of Embodiment 4, the main difference is that the pull-down maintaining module 10 includes a sixth controllable switch T52 and a thirteenth controllable switch T62;
  • the control end of the sixth controllable switch T52 is coupled to the output terminal Q(N) of the pull-up control module 100, and the input end of the sixth controllable switch T52 is coupled to the control of the first controllable switch T32 and the second controllable switch T42.
  • the output end of the sixth controllable switch T52 is coupled to the reference low level signal; the control end of the thirteenth controllable switch T62 is coupled to the output terminal Q(N) of the pull-up control module 100, tenth
  • the input end of the three controllable switch T62 is coupled to the eighth controllable switch T33 and the control end ⁇ ( ⁇ ) of the ninth controllable switch T43, and the output end of the thirteenth controllable switch T62 is coupled to the reference low level signal VSSo
  • the sixth controllable switch T52 and the thirteenth controllable switch T62 assist in pulling down the potentials at P(N) and K(N), thereby turning off the pull-down maintenance module, so as not to pull down the pull-down function of the module to the GOA.
  • the output of the circuit has an effect.
  • FIG. 9 is a fourth schematic diagram of Embodiment 5 of the present invention, and FIG. 9 is a change based on FIG. 7.
  • the pull-down maintenance module 10 includes a sixth controllable switch T52 and a thirteenth controllable switch T62;
  • the control end of the controllable switch T52 is coupled to the output terminal Q(N) of the pull-up control module 100, and the input end of the sixth controllable switch T52 is coupled to the control terminal S(N) of the fourth controllable switch T53.
  • Control switch T52 The output end is coupled to the reference low level signal; the control end of the thirteenth controllable switch T62 is coupled to the output terminal Q(N) of the pull-up control module 100, and the input end of the thirteenth controllable switch T62 is coupled to the eleventh The control terminal T(N) of the control switch T63, the output end of the thirteenth controllable switch ⁇ 62 is coupled to the reference low level signal VSSo.
  • the reference low level signal VSS described in this embodiment includes the first reference low level signal VSS1. And a second reference low level signal VSS2.
  • Embodiment 10 is a first schematic diagram of Embodiment 6 of the present invention.
  • the main difference between FIG. 10 and Embodiment 1 to Embodiment 5 is that both the control end and the input end of the pull-up control module 100 are coupled to the upper downlink signal ST (N-2). ). It is possible to prevent the upper scanning line G(N-2) from affecting the output of the subsequent GOA circuit.
  • FIG. 11 is a second schematic diagram of Embodiment 6 of the present invention.
  • the main difference between FIG. 11 and FIG. 10 is that the control end of the twentieth controllable switch T31 in the pull-down module 400 is coupled to the lower-level scan line G(N+2) or the lower level.
  • the signal ST(N+2) is transmitted downstream, and the control investigation of the twenty-first controllable switch T41 is coupled to the lower-level downlink signal.
  • FIG. 12 is a third schematic diagram of Embodiment 6 of the present invention, and FIG. 12 is different from FIG. 11 in that the output end of the seventh controllable switch ⁇ 2 is coupled to the second pull-down sustain signal LC2, and the fourteenth controllable switch is coupled to the A pull-down sustain signal LC1.
  • FIG. 13 is a first schematic diagram of Embodiment 7 of the present invention
  • FIG. 14 and FIG. 15 are signal waveform diagrams of a circuit according to Embodiment 7 of the present invention
  • the first pull-down sustain signal LC1 and the second pull-down sustain signal LC2 are The low-frequency signal and the low-frequency signal can avoid fluctuations of the signal caused by the potential change on the GOA circuit when the high-frequency signal is switched between high and low levels.
  • the pulse period for LC1 and LC2 can be made. There is a necessary limitation, and only the potentials of LC1 and LC2 are required to be complementary.
  • the Blanching Time between each frame is preferably selected by the signal switching time, so that the pull-down sustain signal and the pull-up do not occur.
  • the control signal waveform does not match and the GOA circuit is in danger of malfunction or even failure. It is not prone to problems and enhances the stability of the GOA circuit.
  • Figure 14 is a signal waveform diagram of the circuit of Figure 13 of the present invention, which shows a waveform diagram of the case where the duty ratio of the signal is always 40/60, and the clock scan signal is responsible for the high potential generation of the Gate waveform.
  • the number LC is responsible for controlling the high and low potentials of the pull-down sustain circuit part, such as P(N) and K(N). During operation, its potential is pulled to the low potential of LC, that is, T32 and T42 are used for pull-down maintenance.
  • the potential of the control terminal of the TFT is in a more negative state than VSS during operation to ensure the operation of the GOA circuit; the reference low level signal VSS is responsible for providing the low potential of the Gate output signal and pulling down the Q(N), S(N) At T(N) point, when the duty ratio of 40/60 is used, the Gate waveform will be pulled to the low potential CKL of the clock scan signal CK after being turned off. Generally, CKL ⁇ VSS is designed, and then pulled to the reference low voltage.
  • the potential of the flat signal VSS which can generate a third-order drive Gate signal, effectively solves the image of the clock-through effect of the TFT in the pixel display area.
  • STV is the GOA circuit start signal.
  • the GOA start signal STV is responsible for turning on the first stage or the first and second level GOA circuits, and is generally designed to pull down the Q of the last or last two stages.
  • control outputs, input and downlink, and upload signals are generated by the operation of the GOA circuit itself.
  • the Q point will be convex.
  • FIG. 15 is a signal waveform diagram of the circuit of FIG. 13 of the present invention, and FIG. 15 is a variation based on FIG. 14, the main difference being: when the duty ratio of the clock scanning signal CK is 50/50, the biggest difference in waveform is Q.
  • the waveform shape of the point, and the 50/50 duty ratio can improve the leakage behavior of the Q point in the switching gap of the clock scanning signal, and increase the opening time of the Gate.
  • Embodiment 8 is a schematic diagram of Embodiment 8 of the present invention.
  • the main difference is that the output ends of the sixth controllable switch T52 and the thirteenth controllable switch T62 are respectively coupled to the second pull-down maintaining signal LC2.
  • the first pull-down maintaining signal LC1 which can enable the sixth controllable switch T52 and the thirteenth controllable switch T62 to assist, the first controllable switch T32, the second controllable switch ⁇ 42, and the eighth controllable switch ⁇ 33
  • the control terminal of the ninth controllable switch ⁇ 43 is pulled down to a lower potential, thereby making it in a more negative off state, improving leakage.
  • Figure 17 is a signal waveform diagram of the circuit of Figure 16 of the present invention, in which signal waveform diagrams at S(N) and TXN) are added as compared with Figure 15.
  • Example 9 :
  • the liquid crystal display device 2 includes a scan driving circuit 1.
  • the scan driving circuit 1 is disposed at both ends of the liquid crystal display device 2.
  • the scan driving circuit 1 is a scan of the present invention. Drive circuit.

Landscapes

  • Engineering & Computer Science (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)
  • Electronic Switches (AREA)

Abstract

一种扫描驱动电路（1）及液晶显示装置（2）。该扫描驱动电路（1）包括：上拉模块（200）、驱动上拉模块（200）的上拉控制模块（100）、下拉维持模块（10）和基准低电平信号（VSS）；所述扫描驱动电路（1）还包括下传模块（300），所述下传模块（300）的控制端连接于所述上拉控制模块（100）的输出端（Q(N)），同时，连接于所述上拉模块（200）的控制端，所述下传模块（300）的输出端输出当前下传信号（ST(N)）。

Description

一种扫描驱动电路及液晶显示装匿
【技术领域】
本发明涉及显示器领域，更具体的说，涉及一种扫描驱动电路及液晶显示 装置。
【背景技术】
现有的 GOA电路，多使用当前 GOA电路的当前扫描线 G(N)来启动下一级 GOA电路的工作，这给 G(N)带来了一定的影响，使其存在信号波动的情况，这 对当前扫描线的工作和下一级 GOA电路的启动都有不利的影响，甚至影响整个 GOA电路的稳定性。
【发明内容】
本发明所要解决的技术问题是提供一种能够改善 GOA电路稳定性的扫描驱 动电路及液晶显示装置。
本发明的目的是通过以下技术方案来实现的：
一种扫描驱动电路，所述扫描驱动电路包括上拉模块、 驱动上拉模块的上 拉控制模块、 下拉维持模块和基准低电平信号；所述上拉模块的输出端耦合于 当前扫描线；所述上拉控制模块的输出端和当前扫描线通过下拉维持模块耦合 于所述基准低电平信号；所述扫描驱动电路还包括下拉维持信号，所述下拉维 持信号耦合于所述下拉维持模块的控制端；
所述扫描驱动电路还包括下传模块，所述下传模块的控制端连接于所述上 拉控制模块的输出端， 同时，连接于所述上拉模块的控制端，所述下传模块的 输出端输出当前下传信号。
所述上拉模块的输入端耦合于时钟扫描信号，所述上拉模块的控制端耦合 于所述上拉控制模块的输出端；所述上拉控制模块的控制端耦合于上拉控制信 号；所述下传模块的输入端耦合于所述时钟扫描信号。 进一步的，所述下拉维持模块包括第一下拉维持模块和第二下拉维持模块； 所述第一下拉维持模块和第二下拉维持模块的输入端耦合于所述上拉控制模块 的输出端，所述第一下拉维持模块和第二下拉维持模块的控制端耦合于所述下 拉维持信号，所述第一下拉维持模块和第二下拉维持模块的输出端耦合于所述 基准低电平信号；
所述扫描驱动电路还包括切换开关，所述切换开关连接于所述第一下拉维 持模块的控制端和第二下拉维持模块的控制端之间 ，所述切换开关的控制端耦 合于所述上拉控制模块的输出端；
当前扫描线处于工作时间内 ，所述切换开关将所述第一下拉维持模块和第 二下拉维持模块关断，从而将所述上拉控制模块的输出端、 当前扫描线与所述 基准低电平信号的连通断开。
进一步的 ，所述下拉维持模块包括第一下拉维持模块，所述第一下拉维持 模块包括第一下拉维持单元，驱动第一下拉维持单元的第一下拉维持控制单元； 所述第一下拉维持单元包括第一可控开关和第二可控开关，所述下拉维持信号 包括第一下拉维持信号，所述第一下拉维持信号通过所述第一下拉维持控制单 元耦合于所述第一可控开关和第二可控开关的控制端；所述上拉控制模块的输 出端通过所述第二可控开关耦合于所述基准低电平信号，所述当前扫描线通过 所述第一可控开关耦合于所述基准低电平信号；
所述下传模块包括第十九可控开关，所述第十九可控开关的控制端连接于 所述上拉控制模块的输出端， 同时，连接于所述上拉模块的控制端，所述第十 九可控开关的输入端耦合于所述时钟扫描信号，所述第十九可控开关的输出端 输出当前下传信号；
所述第一下拉维持单元还包括第七可控开关，所述第七可控开关的控制端 耦合于所述第一可控开关和第二可控开关的控制端，所述第七可控开关的输入 端耦合于所述第十九可控开关的输出端，所述第七可控开关的输出端耦合于所 述基准低电平信号； 当前扫描线处于非工作时间内 ，所述第一下拉维持控制单元根据第一下拉 维持信号控制所述第一可控开关、 第二可控开关和第七可控开关导通，所述第 一可控开关将所述当前扫描线与基准低电平信号连通，所述第二可控开关将上 拉控制模块的输出端与基准低电平信号连通，所述第七可控开关将所述第十九 可控开关的输出端和所述基准低电平信号连通；
当前扫描线处于工作时间内 ，所述第一下拉维持控制单元根据第一下拉维 持信号控制所述第一可控开关和第二可控开关断开，所述第一可控开关将所述 当前扫描线与基准低电平信号的连通断开，所述第二可控开关将所述上拉控制 模块的输出端与基准低电平信号的连通断开，所述第七可控开关将所述第十九 可控开关的输出端与基准低电平信号的连通断开。 设置第七可控开关，能够通 过基准低电平信号及时的将第十九可控开关的输出端的残余电荷及时排净，保 证下传信号的稳定，继而改善下一级扫描线的工作。
进一步的 ，所述第一下拉维持控制单元包括第三可控开关、 第四可控开关 和第五可控开关；所述下拉维持信号还包括与第一下拉维持信号逻辑相反的第 二下拉维持信号；所述第三可控开关采用二极管接法，所述第三可控开关的输 入端和控制端耦合于所述第一下拉维持信号，所述第三可控开关的输出端耦合 于所述第四可控开关的控制端；所述第四可控开关的控制端耦合于所述第三可 控开关的输出端，所述第四可控开关的输入端耦合于所述第一下拉维持信号， 所述第四可控开关的输出端耦合于所述第一可控开关和第二可控开关的控制 端；所述第五可控开关的控制端耦合于所述第二下拉维持信号，所述第五可控 开关的输入端耦合于所述第一下拉维持信号，所述第五可控开关的输出端耦合 于所述第一可控开关和第二可控开关的控制端。
进一步的 ，所述下拉维持模块还包括关断单元，所述关断单元包括第六可 控开关，所述第六可控开关的控制端耦合于所述上拉控制模块的输出端，所述 第六可控开关的输入端耦合于所述第四可控开关的控制端，所述第六可控开关 的输出端耦合于所述基准低电平信号。 进一步的 ，所述下拉维持模块还包括关断单元，所述关断单元包括第六可 控开关，所述第六可控开关的控制端耦合于所述上拉控制模块的输出端，所述 第六可控开关的输入端耦合于所述第四可控开关的控制端，所述第六可控开关 的输出端耦合于所述第二下拉维持信号。
进一步的 ，所述下拉维持模块还包括第二下拉维持模块，所述第二下拉维 持模块包括第二下拉维持单元、 驱动第二下拉维持单元的第二下拉维持控制单 元，所述下拉维持信号还包括与第一下拉维持信号逻辑相反的第二下拉维持信 号；所述第二下拉维持单元包括第八可控开关和第九可控开关；第二下拉维持 信号通过第二下拉维持控制单元耦合于所述第八可控开关和第九可控开关的控 制端；所述当前扫描线通过所述第八可控开关耦合于所述基准低电平信号，所 述上拉控制模块的输出端通过所述第九可控开关耦合于所述基准低电平信号； 当前扫描线处于非工作时间内 ，所述第一下拉维持单元和第二下拉维持单 元交替导通， 当第二下拉维持单元导通时，所述第八可控开关和第九可控开关 导通，将所述上拉控制模块的输出端与基准低电平信号连通，将所述当前扫描 与基准低电平信号连通；
当前扫描线处于工作时间内 ，所述第一下拉维持单元和第二下拉维持单元 均断开，所述第一可控开关、 第二可控开关、 第八可控开关和第九可控开关断 开，将所述上拉控制模块的输出端与基准低电平信号的连通断开，将所述当前 扫描线与基准低电平信号的连通断开。 下拉维持模块设置两组，可以通过两组 下拉维持模块的切换工作，使得其中一组可以有一半的时间处于负压恢复状态， 避免单 _ _组下拉维持模块工作过久，其中的 TFT的开态和关态电位改变，造 成下拉维持模块需要导通的时候导通不畅，而需要关断的时候，无法完全关断， 这使得 GOA电路的稳定性变好。
进一步的 ，所述第二下拉维持控制单元还包括第十可控开关、 第十一可控 开关和第十二可控开关；所述第十可控开关采用二极管接法，所述第十可控开 关的输入端和控制端耦合于所述第二下拉维持信号，所述第十可控开关的输出 端耦合于所述第十一可控开关的控制端；所述第十一可控开关的控制端耦合于 所述第十可控开关的输出端，所述第十一可控开关的输入端耦合于所述第二下 拉维持信号，所述第十一可控开关的输出端耦合于所述第八可控开关和第九可 控开关的控制端； 所述第十二可控开关的控制端耦合于所述第一下拉维持信 号，所述第十二可控开关的输入端耦合于所述第二下拉维持信号，所述第十二 可控开关的输出端耦合于所述第八可控开关和第九可控开关的控制端；
当前扫描线处于非工作时间内 ，所述第二下拉维持模块导通时，所述第十 可控开关、 第十一可控开关和第十二可控开关根据所述第一下拉维持信号和第 二下拉维持信号，控制所述第八可控开关和第九可控开关导通，将所述上拉控 制模块的输出端与基准低电平信号连通，将所述当前扫描线与基准低电平信号 连通。
进一步的 ，所述基准低电平信号包括第一基准低电平信号和第二基准低电 平信号；所述第二基准低电平信号的电位低于所述第一基准低电平信号，所述 下拉维持信号的低电平的电位低于所述第二基准低电平的电位；所述当前扫描 线通过所述第八可控开关耦合于所述第二基准低电平信号，所述上拉控制模块 的输出端通过所述第九可控开关耦合于所述第一基准低电平信号；
当前扫描线处于非工作时间内 ，所述第二下拉维持模块导通时，所述第 八可控开关和第九可控开关导通，所述第八可控开关将所述当前扫描线和第一 基准低电平信号连通，所述第九可控开关将所述上拉控制模块的输出端和所述 第二基准低电平信号连通。
进一步的 ，所述下拉维持模块还包括关断单元，所述关断单元包括第六可 控开关，和第十三可控开关；所述基准低电平信号包括第一基准低电平信号和 第二基准低电平信号；所述第二基准低电平信号的电位低于所述第一基准低电 平信号，所述下拉维持信号的低电平时电位低于所述第二基准低电平的电位； 所述当前扫描线通过所述第八可控开关耦合于所述第一基准低电平信号，所述 上拉控制模块的输出端通过所述第九可控开关耦合于所述第二基准低电平信 号；所述第十三可控开关的输入端耦合于所述第八可控开关和第九可控开关的 控制端，所述第十三可控开关的输出端耦合于所述第一基准电平信号或第二基 准电平信号或第二下拉维持信号；而所述第一可控开关的输出端耦合于所述第 一基准低电平信号，所述第二可控开关、 第七可控开关的输出端耦合于所述第 二基准低电平信号。 在工作期间 ，第六可控开关和第十三可控开关辅助拉低第 四可控开关的控制端和第十一可控开关的控制端处的电位，这有助于拉低第一 可控开关和第二可控开关的控制端以及第八可控开关和第九可控开关的控制端 的电位，从而关断下拉维持模块，以免下拉维持模块的下拉作用对 GOA电路的 输出造成影响。
进一步的 ，所述第二下拉维持单元还包括第十四可控开关；所述第十四可 控开关的控制端耦合于所述第八可控开关和第九可控开关的控制端，所述第十 四可控开关的输入端耦合于所述第十九可控开关的输出端，所述第十四可控开 关的输出端耦合于所述基准低电平信号；
当前扫描线处于非工作时间内 ，所述第二下拉维持单元导通时，所述第十 四可控开关导通，将所述第十九可控开关的输出端和所述基准低电平信号连通； 当前扫描线处于工作时间内 ，所述第二下拉维持单元断开，所述第十四可 控开关断开，将所述第十九可控开关的输出端和所述基准低电平信号的连通断 开。
进一步的 ，所述下拉维持模块还包括切换开关，所述切换开关的控制端耦 合于所述上拉控制模块的输出端，切换开关设置在第一可控开关和第二可控开 关的控制端与第八可控开关和第九可控开关的控制端之间 ；
在当前扫描线处于工作时间内 ，所述切换开关导通，从而将所述第一下拉 维持单元和第二下拉维持单元的控制端连通，所述第一下拉维持单元和第二下 拉维持单元的控制端中处于低电位的一端，将处于高电位的另一端拉低，从而 将所述一下拉维持单元和第二下拉维持单元关断。 设置切换开关起到平衡其两 端电位的作用 ，在工作期间 ，尤其是在第六可控开关和第十三可控开关失效时， 将第一可控开关、 第二可控开关、 第八可控开关和第九可控开关关断，以免由 于起到下拉作用的开关不完全关断对当前扫描线和上拉控制模块的控制端处的 信号造成影响，从而对 GOA电路的输出造成影响。
进一步的 ，所述上拉控制模块包括第十七可控开关；所述第十七可控开关 的输出端耦合于所述上拉模块的控制端，所述第十七可控开关的控制端耦合于 所述上级下传信号，所述第十七可控开关的输入端耦合于上级扫描线或所述上 级下传信号；所述上拉模块包括第十八可控开关，所述第十八可控开关的控制 端耦合于所述上拉控制模块的输出端，所述第十八可控开关的输入端耦合于时 钟扫描信号，所述第十八可控开关的输出端耦合于当前扫描线；所述扫描驱动 电路还包括下拉模块，所述下拉模块包括第二十可控开关和第二十一可控开关， 所述第二十可控开关和第二十一可控开关的控制端耦合于下级扫描线；所述第 二十可控开关的输入端耦合于当前扫描线，所述第二十可控开关的输出端耦合 于所述基准低电平信号；所述第二十一可控开关的输入端耦合于所述上拉控制 模块的输出端，所述第二十一可控开关的输出端耦合于所述基准低电平信号； 所述扫描驱动电路还包括储能电容，所述储能电容的第一端耦合于所述上拉控 制模块的输出端，所述储能电容的第二端分别耦合于所述上拉模块的输出端和 所述下拉维持模块。
一种液晶显示装置，所述液晶显示装置包括本发明任一所述的一种扫描驱 动电路。
经研究发现，现在的 GOA电路多使用当前 GOA电路的当前扫描线 G(N) 来启动下一级 GOA电路 G(N+2)的工作，而由于当前扫描线既用来驱动栅线工 作，同时，又作为下一个 GOA电路的启动信号，这使得该信号不稳定，对 GOA 电路的输出造成一定影响，继而影响显示效果；本发明由于添加了下传模块， 下传模块同步于当前扫描线产生下传信号，该下传信号独立的用于下一级 GOA 电路的启动 ，如此一来可以保证当前扫描线 G(N)能够稳定的工作， 同时，在当 前扫描线 G(N)出现问题的时候，也不会对下级的 GOA的工作造成影响，增强 GOA电路的稳定，改善了 GOA电路的工作
【附图说明】
图 1为本发明一种扫描驱动电路的原理图 ；
图 2为本发明一种扫描驱动电路实施例一的示意图 ；
图 3为本发明一种扫描驱动电路实施例二的示意图 ；
图 4是本发明一种扫描驱动电路实施例三的示意图 ；
图 5是本发明一种扫描驱动电路实施例四的示意图 ；
图 6为本发明一种扫描驱动电路实施例五第一示意图 ；
图 7为本发明一种扫描驱动电路实施例五第二示意图 ；
图 8为本发明一种扫描驱动电路实施例五第三示意图 ；
图 9为本发明一种扫描驱动电路实施例五第四示意图 ；
图 10为本发明一种扫描驱动电路实施例六第一示意图 ；
图 11为本发明一种扫描驱动电路实施例六第二示意图 ；
图 12为本发明一种扫描驱动电路实施例六第三示意图 ；
图 13为本发明一种扫描驱动电路实施例七的示意图 ；
图 14为本发明一种扫描驱动电路实施例七第一信号波形图 ；
图 15为本发明一种扫描驱动电路实施例七第二信号波形图 ；
图 16为本发明一种扫描驱动电路实施例八的示意图 ；
图 17为本发明实施例八的信号波形图 ；
图 18是本发明一种液晶显示装置的示意图。
【具体实施方式】
下面结合附图和较佳的实施例对本发明作进一步说明。
图 1为本发明一种扫描驱动电路的原理图 ，该扫描驱动电路 1包括上拉模块 200、驱动上拉模块 200的上拉控制模块 100、 下拉维持模块 10和基准低电平信 号 VSS；上拉模块 200的输出端耦合于当前扫描线 G(N) ,上拉模块 200的输入 端耦合于时钟扫描信号 CK ,上拉模块 200的控制端耦合于上拉控制模块 100的 输出端 Q(N)；上拉控制模块 100的控制端耦合于上拉控制信号 ST(N-2)/G(N-2) , 上拉控制信号包括上级扫描线 G(N-2)和上级下传信号 STXN-2)；所述上拉控制模 块 100的输出端 Q(N)和当前扫描线 G(N)通过下拉维持模块 10耦合于基准低电 平信号 VSS；其中 ，所述下拉维持模块 10的输入端耦合于上拉控制模块 100的 输出端 Q(N) ,下拉维持模块 10的输出端耦合于基准低电平信号 VSS；所述扫 描驱动电路还包括下拉维持信号 LC ,下拉维持信号 LC耦合于下拉维持模块 10 的控制端；
如上所述的扫描驱动电路还包括下传模块 300 ,下传模块 300的控制端连接 于上拉控制模块 100的输出端 Q(N) ,同时，连接于上拉模块 200的控制端，下 传模块 300的输入端耦合于时钟扫描信号 CK ,下传模块 300的输出端输出当前 下传信号 ST(N)。
如上所述的扫描驱动电路还包括下拉模块 400 ,下拉模块 400的输入端分别 耦合于当前扫描线 G(N)和上拉控制模块 100的输出端 Q(N)，下拉模块 400的控 制端耦合于下级扫描线 G(N+2) ,下拉模块 400的输出端耦合于基准低电平信号 VSS。
如上所述的下拉维持信号 LC 是由时序控制电路或其他电路产生的周期信 号，下拉维持信号 LC处于低电平（ logic 0 )时，其电压低于基准低电平信号 VSS的电压。
如上所述的扫描驱动电路还包括储能电容 Cb，储能电容 Cb的第一端耦合于 上拉控制模块 100的输出端 Q(N) ,储能电容 Cb的第二端分别耦合于上拉模块 200的输出端和下拉维持模块 10。
经研究发现，现在的 GOA电路多使用当前 GOA电路的当前扫描线 G(N)来 启动下一级 GOA电路 G(N+2)的工作，而由于当前扫描线既用来驱动栅线工作， 同时，又作为下一个 GOA电路的启动信号，这使得该信号不稳定，对 GOA电 路的输出造成一定影响，继而影响显示效果；本发明由于添加了下传模块，下 传模块同步于当前扫描线产生下传信号，该下传信号独立的用于下一级 GOA电 路 G(N+2)的启动，如此一来可以保证当前扫描线 G(N)能够稳定的工作，同时， 在当前扫描线 G(N)出现问题的时候，也不会对下级的 GOA的工作造成影响， 增强 GOA电路的稳定，改善了 GOA电路的工作。
实施例一：
图 2为本发明实施例一的示意图 ，结合图 1可知，下拉维持模块 10包括第 一下拉维持模块 600和第二下拉维持模块 700；第一下拉维持模块 600和第二下 拉维持模块 700的输入端耦合于上拉控制模块 100的输出端 Q(N) ,第一下拉维 持模块 600和第二下拉维持模块 700的控制端耦合于下拉维持信号 LC ,第一下 拉维持模块 600和第二下拉维持模块 700的输出端耦合于基准低电平信号 VSS； 扫描驱动电路还包括切换开关 T55 ,切换开关 T55连接于第一下拉维持模块 600的控制端和第二下拉维持模块 700的控制端之间 ，切换开关 T55的控制端耦 合于上拉控制模块 100的输出端 Q(N)；
当前扫描线 G(N)处于工作时间内 ，切换开关 T55将第一下拉维持模块 600 和第二下拉维持模块 700关断，从而将上拉控制模块 100的输出端 Q(N)、 当前 扫描线 G(N)与基准低电平信号 VSS的连通断开。
切换开关 T55用于在扫描线 G(N)处于工作时间内 ，将第一下拉维持模块 600 和第二下拉维持模块 700关断，避免其下拉作用在工作时间内仍工作，而使得 Q(N)点的电压升不上去而导致 GOA电路失效。
实施例二：
图 3所示为本发明实施例二的示意图 ，图 3是基于图 1的展开图 ，第一下拉 维持模块 600包括第一下拉维持单元 610和驱动第一下拉维持单元 610的第一 下拉维持控制单元 620；第一下拉维持单元 610包括第一可控开关 T32和第二可 控开关 T42 ,下拉维持信号 LC包括第一下拉维持信号 LC1 ,第一下拉维持信号 LC1通过第一下拉维持控制单元 620耦合于第一可控开关 T32和第二可控开关 T42的控制端；当前扫描线 G(N)通过第一可控开关 T32耦合于基准低电平信号 VSS ,上拉控制模块 100的输出端 Q(N)通过第二可控开关 T42耦合于基准低电 平信号 VSS；
如上所述的下传模块 300包括第十九可控开关 T22 ,第十九可控开关 T22的 控制端连接于上拉控制模块 100的输出端 Q(N) , 同时，连接于上拉模块 200的 控制端，第十九可控开关 T22的输入端耦合于时钟扫描信号 CK ,第十九可控开 关 T22的输出端输出当前下传信号 ST ( N )；而第一下拉维持单元 610还包括第 七可控开关 T72的控制端耦合于第一可控开关 T32和第二可控开关 T42的控制 端，第七可控开关 T72的输入端耦合于第十九可控开关 T22的输出端，第七可 控开关 ΊΊ2的输出端耦合于基准低电平信号 VSS；
当前扫描线 G(N)处于非工作时间内 ，第一下拉维持控制单元 620根据第一下 拉维持信号 LC1控制第一可控开关 T32、第二可控开关 Τ42和第七可控开关 Τ72 导通，第一可控开关 Τ32将当前扫描线 G(N)与基准低电平信号 VSS连通，第二 可控开关 T42将上拉控制模块 100的输出端与基准低电平信号 VSS连通，第七 可控开关 T72将第十九可控开关 T22的输出端和基准低电平信号 VSS连通； 当前扫描线 G(N)处于工作时间内 ，第一下拉维持控制单元 620根据第一下拉 维持信号 LC1控制第一可控开关 T32和第二可控开关 T42断开，第一可控开关 T32将当前扫描线 G(N)与基准低电平信号 VSS的连通断开，第二可控开关 T42 将上拉控制模块 100的输出端 Q(N)与基准低电平信号 VSS的连通断开，第七可 控开关 T72将第十九可控开关 T22的输出端与基准低电平信号 VSS的连通断开。 设置第七可控开关 T72 ,能够通过基准低电平信号 VSS及时的将第十九可控开 关 T22的输出端的残余电荷及时排净，保证下传信号的稳定，继而改善下一级 扫描线的工作。
如上所述的第一下拉维持控制单元 620包括第三可控开关 T51、 第四可控开 关 Τ53和第五可控开关 Τ54；下拉维持信号 LC还包括与第一下拉维持信号 LC1 逻辑相反的第二下拉维持信号 LC2；第三可控开关 T51采用二极管接法，第三 可控开关 T51的输入端和控制端耦合于第一下拉维持信号 LC1 ,第三可控开关 T51 的输出端耦合于第四可控开关 T53的控制端，还可以耦合于第一可控开关 T32和第二可控开关 T42的控制端；第四可控开关 T53的控制端耦合于第三可 控开关 T51 的输出端，第四可控开关 T53 的输入端耦合于第一下拉维持信号 LC1 ,同时，耦合于第二下拉维持信号 LC2 ,第四可控开关 T53的输出端耦合于 第一可控开关 T32和第二可控开关 T42的控制端；第五可控开关 T54的控制端 耦合于第二下拉维持信号 LC2 ,第五可控开关 T54的输入端耦合于第一下拉维 持信号 LC1 ,第五可控开关 T54的输出端耦合于第一可控开关 T32和第二可控 开关 T42的控制端。
如上所述的下拉维持模块 10包括第二下拉维持模块 700，第二下拉维持模块 700包括第二下拉维持单元 710、 驱动第二下拉维持单元 710的第二下拉维持控 制单元 720，下拉维持信号 LC还包括与第一下拉维持信号 LC1逻辑相反的第二 下拉维持信号 LC2；第二下拉维持单元 710包括第八可控开关 T33和第九可控 开关 T43；第二下拉维持信号 LC2通过第二下拉维持控制单元 720耦合于第八 可控开关 T33和第九可控开关 T43的控制端； 当前扫描线 G(N)通过第八可控 开关 T33耦合于基准低电平信号 VSS ,上拉控制模块 100的输出端 Q(N)通过第 九可控开关 T43耦合于基准低电平信号 VSS；
当前扫描线 G(N)处于非工作时间内 ，第一下拉维持单元 610和第二下拉维持 单元 710交替导通， 当第二下拉维持单元 710导通时，第八可控开关 T33和第 九可控开关 T43导通，将上拉控制模块 100的输出端与基准低电平信号 VSS连 通，将当前扫描线 G(N)与基准低电平信号 VSS连通；
当前扫描线 G(N)处于工作时间内 ，第一下拉维持单元 610和第二下拉维持单 元 710均断开，第一可控开关 T32、 第二可控开关 Τ42、 第八可控开关 Τ33和第 九可控开关 Τ43 断开，将上拉控制模块 100的输出端 Q(N)与基准低电平信号 VSS的连通断开，将当前扫描线 G(N)与基准低电平信号 VSS的连通断开。下拉 维持模块设置两组，可以通过两组下拉维持模块的切换工作，使得其中一组可 以有一半的时间处于负压恢复状态，避免单 _ _组下拉维持模块工作过久，其 中的 TFT的开态和关态电位改变，造成下拉维持模块需要导通的时候导通不畅， 而在需要关断的时候，无法完全关断的情况。
如上所述的第二下拉维持控制单元 720包括第十可控开关 T61、 第十一可控 开关 Τ63和第十二可控开关 Τ64；第十可控开关 T61采用二极管接法，第十可 控开关 T61的输入端和控制端耦合于第二下拉维持信号 LC2，第十可控开关 T61 的输出端耦合于第十一可控开关 Τ63的控制端 ^可以耦合于第八可控开关 Τ33 和第九可控开关 Τ43的控制端；第十一可控开关 Τ63的控制端耦合于第十可控 开关 T61 的输出端，第十一可控开关 Τ63 的输入端耦合于第二下拉维持信号 LC2 ,同时，耦合于第一下拉维持信号 LC1 ,第十一可控开关 Τ63的输出端耦合 于第八可控开关 Τ33和第九可控开关 Τ43的控制端；第十二可控开关 Τ64的控 制端耦合于第一下拉维持信号 LC1 ,第十二可控开关 Τ64的输入端耦合于第二 下拉维持信号 LC2 ,第十二可控开关 Τ64的输出端耦合于第八可控开关 Τ33和 第九可控开关 Τ43的控制端；
当前扫描线 G(N)处于非工作时间内 ，第二下拉维持模块 700导通时，第十可 控开关 T61、 第十一可控开关 Τ63和第十二可控开关 Τ64根据第一下拉维持信 号 LC1和第二下拉维持信号 LC2 ,控制第八可控开关 Τ33和第九可控开关 Τ43 导通，将上拉控制模块 100的输出端与基准低电平信号 VSS连通，当前扫描线 G(N)与基准低电平信号 VSS连通。
如上所述的下拉维持模块 10包括关断单元 900，关断单元 900包括第六可控 开关 T52和第十三可控开关 T62 ,第六可控开关 T52和第十三可控开关 T62的 控制端耦合于上拉控制模块 100的输出端 Q(N) ,第六可控开关 T52的输入端耦 合于第四可控开关 T53 的控制端，第十三可控开关的输入端耦合于第十一可控 开关 T63的控制端；第六可控开关 T52的输出端耦合于基准低电平信号 VSS或 第二下拉维持信号 LC2 ,第十三可控开关 T62的输出端耦合于基准低电平信号 VSS或第一下拉维持信号 LC1。 在工作期间 ， T52和 T62辅助拉低第四可控开 关 T53的控制端 S(N)和第十一可控开关 T63的控制端 T(N)处的电位，这有助于 拉低第一可控开关 Τ32和第二可控开关 Τ42 的控制端 Ρ(Ν)以及第八可控开关 Τ33和第九可控开关 Τ43的控制端 Κ(Ν)的电位，从而关断下拉维持模块，以免 下拉维持模块的下拉作用对 GOA电路的输出造成影响。而且由于第一下拉维持 信号 LC1的低电平低于第一基准低电平信号， 因而，第一可控开关、 第二可控 开关、 八可控开关和第九可控开关的控制端和输出端的电位差 Vgs < 0 ,即处于 更负的关态，能更好的防止漏电。
如上所述的第二下拉维持单元 710包括第十四可控开关 T73；第十四可控开 关 T73的控制端耦合于第八可控开关 T33和第九可控开关 T43的控制端，第十 四可控开关 T73的输入端耦合于第十九可控开关 T22的输出端，第十四可控开 关的输出端耦合于基准低电平信号 VSS；
当前扫描线 G(N)处于非工作时间内 ，第二下拉维持单元 710导通时，第十四 可控开关 T73导通，将第十九可控开关 T22的输出端和基准低电平信号 VSS连 通；
当前扫描线 G(N)处于工作时间内 ，第二下拉维持单元 710断开，第十四可控 开关 T73断开，将第十九可控开关 T22的输出端和基准低电平信号 VSS的连通 断开。
如上所述的下拉维持模块 10包括平衡单元 800，平衡单元 800包括切换开关 T55 ,切换开关 T55的控制端耦合于上拉控制模块 100的输出端 Q(N) ,切换开 关 T55设置在第一可控开关 T32和第二可控开关 T42的控制端与第八可控开关 T33和第九可控开关 T43的控制端之间 ；
在当前扫描线 G(N)处于工作时间内 ，切换开关 T55导通，从而将第一下拉 维持单元 610和第二下拉维持单元 710的控制端连通，第一下拉维持单元 610 和第二下拉维持单元 710 的控制端中处于低电位的一端，将处于高电位的另一 端拉低，从而将第一下拉维持单元 610和第二下拉维持单元 710关断。 设置切 换开关 T55起到平衡其两端电位的作用 ，在工作期间 ，尤其是在 T52和 T62失 效时， P ( N )点的电位可以通过切换开关 T55将其电位拉低至 K(N)点的电位， 将第一可控开关 T32、 第二可控开关 Τ42、 第八可控开关 Τ33和第九可控开关 Τ43关断，以免由于 TFT不完全关断对 G(N)和 Q(N)处的信号造成影响，从而对 GOA电路的输出造成影响。
如上所述的上拉控制模块 100包括第十七可控开关 T11；第十七可控开关 T11 的输出端耦合于上拉模块 200的控制端，第十七可控开关 T11的控制端耦合于 上级下传信号 ST(N-2)，第十七可控开关 T11的输入端耦合于上级扫描线 G(N-2) 或上级下传信号 STXN-2)；上拉模块 200包括第十八可控开关 T21 ,第十八可控 开关 T21的控制端耦合于上拉控制模块 100的输出端 Q(N)，第十八可控开关 T21 的输入端耦合于时钟扫描信号 CK，第十八可控开关 T21的输出端耦合于当前扫 描线 G(N)；扫描驱动电路还包括下拉模块 400 ,下拉模块 400包括第二十可控 开关 T31和第二十一可控开关 T41 ,第二十可控开关 T31和第二十一可控开关 T41的控制端耦合于下级扫描线 G(N+2)；第二十可控开关 T31的输入端耦合于 当前扫描线 G(N) ,第二十可控开关 T31的输出端耦合于基准低电平信号 VSS； 第二十一可控开关 T41的输入端耦合于上拉控制模块 100的输出端去 Q ( N ) , 第二十一可控开关 T41的输出端耦合于基准低电平信号 VSS；扫描驱动电路还 包括储能电容 Cb ,储能电容 Cb 的第一端耦合于上拉控制模块 100 的输出端 Q(N)，储能电容 Cb的第二端分别耦合于上拉模块 200的输出端和下拉维持模块 10。
如上所述的基准低电平信号 VSS包括第一基准低电平信号 VSS 1和第二基准 低电平信号 VSS2 ；第二基准低电平信号 VSS2的电位低于第一基准低电平信号 VSS1 ,下拉维持信号 LC的低电平时电位低于第二基准低电平 VSS2的电位； 当前扫描线 G(N)通过第八可控开关 T33耦合于第一基准低电平信号 VSS1 ,上 拉控制模块 100的输出端 Q(N)通过第九可控开关 T43耦合于第二基准低电平信 号 VSS2；另外，第六可控开关 T52的输入端耦合于第四可控开关 T53的控制端， 当然，第六可控开关 T52的输入端还可以耦合于第一可控开关 T32和第二可控 开关 T42的控制端，第十三可控开关 T62的输入端耦合于所述第十一可控开关 T63的控制端，当然，第十三可控开关 T62的输入端还可以耦合于第八可控开 关和第九可控开关的控制端；第六可控开关 T52的输出端耦合于第二下拉维持 信号 LC2或第二基准低电平信号 VSS2 , 当然，第六可控开关 T52的输出端也 可以耦合于第一基准低电平信号 VSS 1，第十三可控开关 T62的输出端耦合于第 二基准电平信号 VSS2或第一下拉维持信号 LC1 , 当然，第十三可控开关 T62 的输出端也可以耦合于第一基准低电平信号 VSS1；而第一可控开关 T32和第八 可控开关 T33的输出端耦合于第一基准低电平信号 VSS 1 ,第二可控开关 T42、 第七可控开关 Τ72、 第九可控开关 Τ43和第十四可控开关 Τ73的输出端耦合于 第二基准低电平信号 VSS2。
本实施例在添加下传模块 300的基础上添加了第七可控开关 T72和第十四可 控开关 T73，原因是，下传模块的输出端由于寄生电容等因素的影响，产生的信 号存在波动情况；特别的若是其中的电荷无法在当前扫描线非工作期间及时排 净的话，当前扫描线工作期间产生的不稳定的下传信号，会对下一级 GOA电路 的驱动造成影响；而添加了第七可控开关 T72和第十四可控开关 T73以后，第 七可控开关 ΊΊ2和第十四可控开关 T73在当前扫描线工作期间 ，能够通过基准 低电平信号及时的将下传模块输出端的残余电荷及时排净，保证下传信号的稳 定，继而改善下一级扫描线的工作。
当然，本实施例也可以只设置单边的下拉维持模块，单边的设置也能达到本 发明改善漏电的目的。
实施例三：
图 4为本发明的实施例三的示意图 ，结合图 1可知，图 4是图 1的展开图 ， 其中 ，下拉维持模块 10包括第一下拉维持模块 600 ,第一下拉维持模块包括第 —下拉维持单元 610，驱动第一下拉维持单元 610的第一下拉维持控制单元 620； 第一下拉维持单元 610包括第一可控开关 T32和第二可控开关 T42 ,下拉维持 信号 LC包括第一下拉维持信号 LC1 ,第一下拉维持信号 LC1通过第一下拉维 持控制单元 620耦合于第一可控开关 T32和第二可控开关 T42的控制端；当前 扫描线 G(N)通过第一可控开关 T32耦合于基准低电平信号 VSS ,上拉控制模块 100的输出端 Q(N)通过第二可控开关 T42耦合于基准低电平信号 VSS
当前扫描线 G(N)处于非工作时间内 ，第一下拉维持控制单元根据第一下拉维 持信号 LC1控制第一可控开关 T32和第二可控开关 T42导通，第一可控开关 T32 将当前扫描线 G(N)与基准低电平信号 VSS连通，第二可控开关 T42将上拉控制 模块 100的输出端 Q(N)与基准低电平信号 VSS连通；
当前扫描线 G(N)处于工作时间内 ，第一可控开关 T32和第二可控开关 T42 断开，第一可控开关 T32将当前扫描线 G(N)与基准低电平信号 VSS的连通断开， 第二可控开关 T42将上拉控制模块 100的输出端 Q(N)与基准低电平信号 VSS的 连通断开。
如上所述的第一下拉维持控制单元 620包括第三可控开关 T51、 第四可控开 关 Τ53和第五可控开关 Τ54；下拉维持信号 LC还包括与第一下拉维持信号 LC1 逻辑相反的第二下拉维持信号 LC2；第三可控开关 T51采用二极管接法，第三 可控开关 T51的输入端和控制端耦合于第一下拉维持信号 LC1 ,第三可控开关 T51 的输出端耦合于第四可控开关 Τ53的控制端，还可以耦合于第一可控开关 Τ32和第二可控开关 Τ42的控制端；第四可控开关 Τ53的控制端耦合于第三可 控开关 T51 的输出端，第四可控开关 Τ53 的输入端耦合于第一下拉维持信号 LC1，第四可控开关 Τ53的输出端耦合于第一可控开关 Τ32和第二可控开关 Τ42 的控制端；第五可控开关 Τ54的控制端耦合于第二下拉维持信号 LC2 ,第五可 控开关 Τ54的输入端耦合于第一下拉维持信号 LC1 ,第五可控开关 Τ54的输出 端耦合于第一可控开关 Τ32和第二可控开关 Τ42的控制端。
如上所述的下拉维持模块 10包括关断单元 900，关断单元 900包括第六可控 开关 Τ52，第六可控开关 Τ52的控制端耦合于上拉控制模块 100的输出端 Q(N) , 第六可控开关 T52的输入端耦合于第四可控开关 T53的控制端，第六可控开关 T52的输出端耦合于基准低电平信号 VSS或第二下拉维持信号 LC2。 如上所述的下拉维持模块 10包括第二下拉维持模块 700，第二下拉维持模块 700包括第二下拉维持单元 710、 驱动第二下拉维持单元 710的第二下拉维持控 制单元 720，下拉维持信号 LC还包括与第一下拉维持信号 LC1逻辑相反的第二 下拉维持信号 LC2；第二下拉维持单元 710包括第八可控开关 T33和第九可控 开关 T43；第二下拉维持信号 LC2通过第二下拉维持控制单元 720耦合于第八 可控开关 T33和第九可控开关 T43的控制端；当前扫描线 G(N)通过第八可控开 关 T33耦合于基准低电平信号 VSS ,上拉控制模块 100的输出端 Q(N)通过第九 可控开关 T43耦合于基准低电平信号 VSS；
在当前扫描线 G(N)处于非工作时间内 ，第一下拉维持单元 610和第二下拉维 持单元 710交替导通，当第二下拉维持单元 710导通时，第八可控开关 T33和 第九可控开关 T43导通，将上拉控制模块 100的输出端 Q(N)与基准低电平信号 VSS连通、 将当前扫描线 G(N)与基准低电平信号 VSS连通；
在当前扫描线 G(N)处于工作时间内 ，第一下拉维持单元 610和第二下拉维持 单元 710均断开，第一可控开关 T32、 第二可控开关 Τ42、 第八可控开关 Τ33 和第九可控开关 Τ43断开，从而将上拉控制模块 100的输出端 Q(N)与基准低电 平信号 VSS的连通断开、 将当前扫描线 G(N)与基准低电平信号 VSS的连通断 开。 下拉维持模块设置两组，可以通过两组下拉维持模块的切换工作，使得其 中一组可以有一半的时间处于负压恢复状态，避免单 _ _组下拉维持模块工作 过久，其中的 ΤΚΓ的开态和关态电位改变，造成下拉维持模块需要导通的时候 导通不畅，而需要关断的时候，无法完全关断。
如上所述的第二下拉维持控制单元 720包括第十可控开关 T61、 第十一可控 开关 Τ63和第十二可控开关 Τ64；第十可控开关 T61采用二极管接法，第十可 控开关 T61的输入端和控制端耦合于第二下拉维持信号 LC2，第十可控开关 T61 的输出端耦合于第十一可控开关 Τ63的控制端 ^可以耦合于第八可控开关 Τ33 和第九可控开关 Τ43的控制端；第十一可控开关 Τ63的控制端耦合于第十可控 开关 T61 的输出端，第十一可控开关 Τ63 的输入端耦合于第二下拉维持信号 LC2 ,第十一可控开关 Τ63的输出端耦合于第八可控开关 Τ33和第九可控开关 Τ43的控制端；第十二可控开关 Τ64的控制端耦合于第一下拉维持信号 LC1 , 第十二可控开关 Τ64的输入端耦合于第二下拉维持信号 LC2 ,第十二可控开关 Τ64的输出端耦合于第八可控开关 Τ33和第九可控开关 Τ43的控制端；
当前扫描线 G(N)处于非工作时间内 ，第二下拉维持模块 700导通时，第十可 控开关 T61、 第十一可控开关 Τ63和第十二可控开关 Τ64根据第一下拉维持信 号 LC1和第二下拉维持信号 LC2 ,控制第八可控开关 Τ33和第九可控开关 Τ43 导通，将上拉控制模块 100的输出端 Q(N)与基准低电平信号 VSS连通、 另将当 前扫描线 G(N)与基准低电平信号 VSS连通。
如上所述的下拉维持模块 10包括平衡单元 800，平衡单元 800包括切换开关 T55 ,切换开关 T55的控制端耦合于上拉控制模块 100的输出端 Q(N) ,切换开 关 T55设置在第一可控开关 T32和第二可控开关 T42的控制端与第八可控开关 T33和第九可控开关 T43的控制端之间 ；
当前扫描线 G(N)处于工作时间内 ，切换开关 T55导通，从而将第一下拉维 持单元 610和第二下拉维持单元 710的控制端连通，第一下拉维持单元 610和 第二下拉维持单元 710 的控制端中处于低电位的一端，将处于高电位的另一端 拉低，从而将第一下拉维持单元 610和第二下拉维持单元 710关断。 设置切换 开关 T55起到平衡其两端电位的作用 ，在工作期间 ，尤其是在 T52和 T62失效 时， P ( N )点的电位可以通过切换开关 T55将其电位拉低至 K(N)点的电位，将 第一可控开关 T32、 第二可控开关 Τ42、 第八可控开关 Τ33和第九可控开关 Τ43 关断，以免由于 TFT不完全关断对 G(N)和 Q(N)处的信号造成影响从而对 GOA 电路的输出造成影响。
如上所述的下拉维持模块 10包括第十三可控开关 T62；第十三可控开关 T62 的控制端耦合于上拉控制模块 100的输出端 Q(N) ,第十三可控开关 T62的输入 端耦合于第十一可控开关 T63的控制端，第十三可控开关 T62的输出端耦合于 基准低电平信号 VSS；第十三可控开关 T62的输出端还可以耦合于第一下拉维 持信号 LCI。在工作期间 ，T52和 Τ62辅助拉低第四可控开关 Τ53的控制端 S(N) 和第十一可控开关 T63的控制端 T(N)处的电位 ^有助于拉低第一可控开关 Τ32 和第二可控开关 Τ42的控制端 Ρ(Ν)以及第八可控开关 Τ33和第九可控开关 Τ43 的控制端 Κ(Ν)的电位，从而关断下拉维持模块，以免下拉维持模块的下拉作用 对 GOA电路的输出造成影响，而且由于第一下拉维持信号 LC1 的低电平低于 第一基准低电平信号， 因而，第一可控开关、 第二可控开关、 八可控开关和第 九可控开关的控制端和输出端的电位差 Vgs < 0 ,即处于更负的关态，能更好的 的防止漏电。
如上所述的第一下拉维持信号 LC1和第二下拉维持信号 LC2是不仅低电平 电位小于基准低电平信号，而且还是低频信号，第一下拉维持信号 LC1和第二 下拉维持信号 LC2的信号切换时间选择在每帧画面之间的空白时间（ Blacnking Time )b
如上所述的上拉控制模块 100包括第十七可控开关 Til，第十七可控开关 Til 的输出端耦合于上拉模块 200的控制端；上拉控制信号包括上级扫描线 G(N-2) 和上级下传信号 STXN-2) ,第十七可控开关 T11 的控制端耦合于上级下传信号 ST(N-2) ,输入端耦合于上级扫描线 G(N-2)；上拉模块 200包括第十八可控开关 T21 ,第十八可控开关 T21的控制端耦合于上拉控制模块 100的输出端 Q(N) , 第十八可控开关 T21 的输入端耦合于时钟扫描信号 CK ,第十八可控开关 T21 的输出端耦合于当前扫描线 G(N)；扫描驱动电路还包括储能电容 Cb，储能电容 Cb的第一端耦合于上拉控制模块 100的输出端 Q(N) ,储能电容 Cb的第二端耦 合于上拉模块 200的输出端。
如上所述的下拉模块 400包括第二十可控开关 T31和第二十一可控开关 T41 , 第二十可控开关 T31 和第二十一可控开关 T41 的控制端耦合于下级扫描线 G(N+2)；第二十可控开关 T31的输入端耦合于当前扫描线 G(N) ,第二十可控开 关 T31的输出端耦合于基准低电平信号 VSS；第二十一可控开关 T41的输入端 耦合于上拉控制模块 100的输出端，第二十一可控开关 T41的输出端耦合于基 准低电平信号 vss。
如上所述的扫描驱动电路包括下传模块 300 ,下传模块 300的控制端耦合于 上拉控制模块 100的输出端 Q(N) , 同时，耦合于上拉模块 200的控制端，下传 模块 300的输入端耦合于时钟扫描信号 CK ,下传模块 300的输出端输出当前下 传信号 ST(N)。
如上所述的下传模块 300包括第十九可控开关 T22 ,第十九可控开关 T22的 控制端耦合于上拉控制模块 100的输出端 Q(N) , 同时，耦合于上拉模块 200的 控制端，第十九可控开关 T22的输入端耦合于时钟扫描信号 CK ,第十九可控开 关 T22的输出端输出当前下传信号 ST(N)。 由于 G(N)处信号若是即用于 gate线 的驱动，又作为下一级 GOA的驱动信号的话，会造成两边的信号不稳定，影响 GOA电路的输出 ， 同时，若是某根 gate线存在坏线的话，会对整个 GOA电路 的运行造成重大影响， 因而添加下传模块 300 ,也作为下一级 GOA的驱动或驱 动之一，如此当某个 gate线出现坏线情况时，也不会对 GOA电路造成影响。
当然，本实施例也可以只设置单边的下拉维持模块，单边的设置也能达到本 发明改善漏电的目的。
实施例四 ：
图 5为本发明实施例四的示意图 ，图 5是图 1的展开图 ，其中 ，基准低电平 信号 VSS包括第一基准低电平信号 VSS 1和电位低于第一基准低电平信号而高 于下拉维持信号的第二基准低电平信号 VSS2 下拉维持模块 10包括第一下拉 维持模块 600 ,第一下拉维持模块包括第一下拉维持单元 610 ,驱动第一下拉维 持单元 610的第一下拉维持控制单元 620；第一下拉维持单元 610包括第一可控 开关 T32和第二可控开关 T42 ,下拉维持信号 LC包括第一下拉维持信号 LC1 , 第一下拉维持信号 LC1 通过第一下拉维持控制单元 620 耦合于第一可控开关 T32和第二可控开关 T42的控制端；当前扫描线 G(N)通过第一可控开关 T32耦 合于第一基准低电平信号 VSS 1 ,上拉控制模块 100的输出端 Q(N)通过第二可 控开关 T42耦合于第二基准低电平信号 VSS2； 当前扫描线 G(N)处于非工作时间内 ，第一下拉维持控制单元根据第一下拉维 持信号 LC1控制第一可控开关 T32和第二可控开关 T42导通，第一可控开关 T32 将当前扫描线 G(N)与第一基准低电平信号 VSS 1连通，第二可控开关 T42将上 拉控制模块 100的输出端 Q(N)与第二基准低电平信号 VSS2连通；
当前扫描线 G(N)处于工作时间内 ，第一可控开关 T32和第二可控开关 T42 断开，第一可控开关 T32将当前扫描线 G(N)与第一基准低电平信号 VSS1的连 通断开，第二可控开关 T42将上拉控制模块 100的输出端 Q(N)与第二基准低电 平信号 VSS2的连通断开。
如上所述的第一下拉维持控制单元 620包括第三可控开关 T51、 第四可控开 关 Τ53和第五可控开关 Τ54；下拉维持信号 LC还包括与第一下拉维持信号 LC1 逻辑相反的第二下拉维持信号 LC2；第三可控开关 T51采用二极管接法，第三 可控开关 T51的输入端和控制端耦合于第一下拉维持信号 LC1 ,第三可控开关 T51 的输出端耦合于第四可控开关 Τ53的控制端，还可以耦合于第一可控开关 Τ32和第二可控开关 Τ42的控制端；第四可控开关 Τ53的控制端耦合于第三可 控开关 T51 的输出端，第四可控开关 Τ53 的输入端耦合于第一下拉维持信号 LC1，第四可控开关 Τ53的输出端耦合于第一可控开关 Τ32和第二可控开关 Τ42 的控制端；第五可控开关 Τ54的控制端耦合于第二下拉维持信号 LC2 ,第五可 控开关 Τ54的输入端耦合于第一下拉维持信号 LC1 ,第五可控开关 Τ54的输出 端耦合于第一可控开关 Τ32和第二可控开关 Τ42的控制端；
当前扫描线 G(N)非工作时间内 ，根据第一下拉维持信号 LC1和第二下拉维 持信号 LC2 ,则第一可控开关 T32和第二可控开关 T42导通，第一基准低电平 信号 VSS 1通过第一可控开关将当前扫描线 G(N)的电位拉低，第二基准低电平 信号 VSS2通过第二可控开关将上拉控制模块 100的输出端 Q(N)的电位拉低； 当前扫描线 G(N)工作时间内 ，第一可控开关 T32和第二可控开关 T42关断， 从而将第二基准低电平信号 VSS2和上拉控制模块 100的输出端 Q(N)的连通断 开，将第一基准低电平信号 VSS1和当前扫描线 G(N)的连通断开。 如上所述的下拉维持模块 10还包括第六可控开关 T52 ,第六可控开关 T52 的控制端耦合于上拉控制模块 100的输出端 Q(N) ,第六可控开关 T52的输入端 耦合于第四可控开关 T53的控制端，第六可控开关 T52的输出端耦合于第二基 准低电平信号 VSS2或第二下拉维持信号 LC2。
如上所述的下拉维持模块 10包括第二下拉维持模块 700，第二下拉维持模块 700包括第二下拉维持单元 710、 驱动第二下拉维持单元 710的第二下拉维持控 制单元 720，下拉维持信号 LC还包括与第一下拉维持信号 LC1逻辑相反的第二 下拉维持信号 LC2；第二下拉维持单元 710包括第八可控开关 T33和第九可控 开关 T43；第二下拉维持信号 LC2通过第二下拉维持控制单元 720耦合于第八 可控开关 T33和第九可控开关 T43的控制端；当前扫描线 G(N)通过第八可控开 关 T33耦合于第一基准低电平信号 VSS1 ,上拉控制模块 100的输出端 Q(N)通 过第九可控开关 T43耦合于第二基准低电平信号 VSS2；
在当前扫描线 G(N)处于非工作时间内 ，第一下拉维持单元 610和第二下拉维 持单元 710交替导通，当第二下拉维持单元 710导通时，第八可控开关 T33和 第九可控开关 T43导通，将上拉控制模块 100的输出端 Q(N)与第二基准低电平 信号 VSS2连通、 将当前扫描线 G(N)与第一基准低电平信号 VSS1连通；
在当前扫描线 G(N)处于工作时间内 ，第一下拉维持单元 610和第二下拉维持 单元 710均断开，第一可控开关 T32、 第二可控开关 Τ42、 第八可控开关 Τ33 和第九可控开关 Τ43断开，从而将上拉控制模块 100的输出端 Q(N)与第二基准 低电平信号 VSS2的连通断开、将当前扫描线 G(N)与第一基准低电平信号 VSS1 的连通断开。 下拉维持模块设置两组，可以通过两组下拉维持模块的切换工作， 使得其中一组可以有一半的时间处于负压恢复状态，避免单 _ _组下拉维持模 块工作过久，其中的 TFT的开态和关态电位改变，造成下拉维持模块需要导通 的时候导通不畅，而需要关断的时候，无法完全关断。
如上所述的第二下拉维持控制单元 720包括第十可控开关 T61、 第十一可控 开关 Τ63和第十二可控开关 Τ64；第十可控开关 T61采用二极管接法，第十可 控开关 T61的输入端和控制端耦合于第二下拉维持信号 LC2，第十可控开关 T61 的输出端耦合于第十一可控开关 T63的控制端 ^可以耦合于第八可控开关 T33 和第九可控开关 T43的控制端；第十一可控开关 T63的控制端耦合于第十可控 开关 T61 的输出端，第十一可控开关 T63 的输入端耦合于第二下拉维持信号 LC2，第十一可控开关 T63的输出端耦合于八可控开关 T33和第九可控开关 T43 的控制端；第十二可控开关 T64的控制端耦合于第一下拉维持信号 LC1 ,第十 二可控开关 T64的输入端耦合于第二下拉维持信号 LC2 ,第十二可控开关 T64 的输出端耦合于第八可控开关 T33和第九可控开关 T43的控制端；
当前扫描线 G(N)处于非工作时间内 ，第二下拉维持模块 700导通时，第十可 控开关 T61、 第十一可控开关 Τ63和第十二可控开关 Τ64根据第一下拉维持信 号 LC1和第二下拉维持信号 LC2 ,控制第八可控开关 Τ33和第九可控开关 Τ43 导通，将上拉控制模块 100的输出端 Q(N)与第二基准低电平信号 VSS2连通、 另将当前扫描线与第一基准低电平信号 VSS1连通。
如上所述的下拉维持模块 10还包括平衡单元 800，平衡单元 800包括切换开 关 T55 ,切换开关 T55的控制端耦合于上拉控制模块 100的输出端 Q(N) ,切换 开关 T55设置在第一可控开关 T32和第二可控开关 T42的控制端与第八可控开 关 T33和第九可控开关 T43的控制端之间 ；
当前扫描线 G(N)处于工作时间内 ，切换开关 T55导通，从而将第一下拉维 持单元 610和第二下拉维持单元 710的控制端连通，第一下拉维持单元 610和 第二下拉维持单元 710 的控制端中处于低电位的一端，将处于高电位的另一端 拉低，从而将第一下拉维持单元 610和第二下拉维持单元 710关断。 设置切换 开关 T55起到平衡其两端电位的作用 ，在工作期间 ，尤其是在 T52和 T62失效 时， P ( N )点的电位可以通过切换开关 T55将其电位拉低至 K(N)点的电位，将 第一可控开关 T32、 第二可控开关 Τ42、 第八可控开关 Τ33和第九可控开关 Τ43 关断，以免由于 TFT不完全关断对 G(N)和 Q(N)处的信号造成影响从而对 GOA 电路的输出造成影响。 如上所述的下拉维持模块 10包括第十三可控开关 T62；第十三可控开关 T62 的控制端耦合于上拉控制模块 100的输出端 Q(N) ,第十三可控开关 T62的输入 端耦合于第十一可控开关 T63的控制端，第十三可控开关 T62的输出端耦合于 第二基准低电平信号 VSS2；第十三可控开关 T62的输出端还可以耦合于第一下 拉维持信号 LC1。 在工作期间 ， T52和 T62辅助拉低第四可控开关 T53的控制 端 S(N)和第十一可控开关 T63的控制端 T(N)处的电位，这有助于拉低第一可控 开关 Τ32和第二可控开关 Τ42的控制端 Ρ(Ν)以及第八可控开关 Τ33和第九可控 开关 Τ43的控制端 Κ(Ν)的电位，从而关断下拉维持模块，以免下拉维持模块的 下拉作用对 GOA电路的输出造成影响；而且由于第二基准低电平信号 VSS2和 第一下拉维持信号 LC1的低电平低于第一基准低电平信号， 因而，第一可控开 关、第二可控开关、八可控开关和第九可控开关的控制端和输出端的电位差 Vgs < 0 ,即处于更负的关态，能更好的的防止漏电。
如上所述的第一下拉维持信号 LC1和第二下拉维持信号 LC2是不仅低电平 电位小于基准低电平信号，而且还是低频信号，第一下拉维持信号 LC1和第二 下拉维持信号 LC2的信号切换时间选择在每帧画面之间的空白时间（ Blacnking Time )b
如上所述的上拉控制模块 100包括第十七可控开关 Ti l，第十七可控开关 Ti l 的输出端耦合于上拉模块 200的控制端；上拉控制信号包括上级扫描线 G(N-2) 和上级下传信号 STXN-2) ,第十七可控开关 T11 的控制端耦合于上级下传信号 ST(N-2) ,输入端耦合于上级扫描线 G(N-2)；上拉模块 200包括第十八可控开关 T21 ,第十八可控开关 T21的控制端耦合于上拉控制模块 100的输出端 Q(N) , 第十八可控开关 T21 的输入端耦合于时钟扫描信号 CK ,第十八可控开关 T21 的输出端耦合于当前扫描线 G(N)；扫描驱动电路还包括储能电容 Cb，储能电容 Cb的第一端耦合于上拉控制模块 100的输出端 Q(N) ,储能电容 Cb的第二端耦 合于上拉模块 200的输出端。
如上所述的下拉模块 400包括第二十可控开关 T31和第二十一可控开关 T41 , 第二十可控开关 T31 和第二十一可控开关 T41 的控制端耦合于下级扫描线 G(N+2)；第二十可控开关 T31的输入端耦合于当前扫描线 G(N) ,第二十可控开 关 T31的输出端耦合于基准低电平信号 VSS；第二十一可控开关 T41的输入端 耦合于上拉控制模块 100的输出端，第二十一可控开关 T41的输出端耦合于基 准低电平信号 VSS。
当然，本实施例也可以只设置单边的下拉维持模块，单边的设置也能达到本 发明改善漏电的目的。
实施例五：
图 6至图 9为本发明实施例五的示意图 ：
图 6是本发明实施例五的第一示意图 ，本实施例是基于实施例三和实施例四 下拉维持模块 10处的不同设置，其主要区别在于，其中 ，第一下拉维持控制单 元 620包括第三可控开关 T51和第五可控开关 T54，第二 下拉维持控制单元 720 包括第十可控开关 T61和第十二可控开关 T64；第三可控开关 T51和第十可控 开关 T61采用二极管接法，即第三可控开关 T51的控制端和输入端耦合于第一 下拉维持信号 LC1 ,第十可控开关 T61的控制端和输入端耦合于第二下拉维持 信号 LC2；第三可控开关 T51的输出端耦合于第一可控开关 T32和第二可控开 关 T42的控制端 Ρ(Ν) ,而第十可控开关 T61的输出端耦合于第八可控开关 T33 和第九可控开关 T43的控制端 K ( N )b
如上所述的下拉维持模块 10还包括平衡单元 800，平衡单元 800包括切换开 关 T55 ,切换开关 T55的控制端耦合于上拉控制模块 100的输出端 Q(N) ,切换 开关 T55设置在第一可控开关 T32和第二可控开关 T42的控制端与第八可控开 关 T33和第九可控开关 T43的控制端之间。 设置切换开关 T55起到平衡其两端 电位的作用 ，在工作期间 ，不同于实施例三和实施例四 ，这里不设置第六可控 开关 T52和第十三可控开关 T62 , P ( N )点的电位依然可以通过切换开关 T55 将其电位拉低至 K(N)点的电位，将第一可控开关 T32、 第二可控开关 Τ42、 第 八可控开关 Τ33和第九可控开关 Τ43关断，以免由于 TFT不完全关断对 G(N) 和 Q(N)处的信号造成影响，从而对 GOA电路的输出造成影响。
图 7为本发明实施例五的第二示意图 ，图 7是基于图 6的改进，其主要的区 别点在于，第一下拉维持控制单元 620还包括第四可控开关 T53，第二下拉维持 控制单元 720包括第十一可控开关 T63;第四可控开关 T53的控制端耦合于第三 可控开关 T51的输出端，第四可控开关 T53的输出端分别耦合于第三可控开关 T51的输出端和第一可控开关 T32、第二可控开关 Τ42的控制端，第四可控开关 Τ53的输入端分别耦合于第一下拉维持信号 LC1和第二下拉维持信号 LC2；第 十一可控开关 Τ63的控制端控制端耦合于第十可控开关 T61的输出端，第十一 可控开关 Τ63的输出端分别耦合于第十可控开关 T61的输出端和第八可控开关 Τ33、第九可控开关 Τ43的控制端，第十一可控开关 Τ63的输入端分别耦合于第 二下拉维持信号 LC2和第一下拉维持信号 LC1。
图 8为本发明实施例五的第三示意图 ，本实施例是基于实施例四的改进，主 要的区别点在于，下拉维持模块 10包括第六可控开关 T52和第十三可控开关 T62；第六可控开关 T52的控制端耦合于上拉控制模块 100的输出端 Q(N) ,第 六可控开关 T52的输入端耦合于第一可控开关 T32和第二可控开关 T42的控制 端 Ρ(Ν) ,第六可控开关 T52的输出端耦合于基准低电平信号；第十三可控开关 T62的控制端耦合于上拉控制模块 100的输出端 Q(N) ,第十三可控开关 T62的 输入端耦合第八可控开关 T33和第九可控开关 T43的控制端 Κ(Ν) ,第十三可控 开关 T62的输出端耦合于基准低电平信号 VSSo
在工作期间 ，第六可控开关 T52和第十三可控开关 T62辅助拉低 P(N)和 K(N) 处的电位，从而关断下拉维持模块，以免下拉维持模块的下拉作用对 GOA电路 的输出造成影响。
图 9为本发明实施例五的第四示意图 ，图 9是基于图 7的改变，主要的区别 点在于，下拉维持模块 10包括第六可控开关 T52和第十三可控开关 T62；第六 可控开关 T52的控制端耦合于上拉控制模块 100的输出端 Q(N) ,第六可控开关 T52的输入端耦合于第四可控开关 T53的控制端 S(N) ,第六可控开关 T52的输 出端耦合于基准低电平信号；第十三可控开关 T62的控制端耦合于上拉控制模 块 100的输出端 Q(N) ,第十三可控开关 T62的输入端耦合第十一可控开关 T63 的控制端 T(N) ,第十三可控开关 Τ62的输出端耦合于基准低电平信号 VSSo 本实施例所述的基准低电平信号 VSS包括第一基准低电平信号 VSS1和第二 基准低电平信号 VSS2。
实施例六：
图 10为本发明实施例六第一示意图 ，图 10 相对于实施例一至实施例五的主 要区别在于 ， 上拉控制模块 100 的控制端和输入端均耦合于上级下传信号 ST(N-2)。 可以避免上级扫描线 G(N-2)对之后的 GOA电路的输出造成影响。
图 11为本发明实施例六第二示意图 ，图 11相对于图 10主要区别在于，下 拉模块 400中的第二十可控开关 T31的控制端耦合于下级扫描线 G(N+2)或下级 下传信号 ST(N+2) ,而第二十一可控开关 T41的控制调研耦合于下级下传信号。
图 12为本发明实施例六第三示意图 ，图 12相对于图 11的区别在于，第七 可控开关 ΊΊ2的输出端耦合于第二下拉维持信号 LC2 ,而第十四可控开关耦合 于第一下拉维持信号 LC1。
实施例七：
图 13是本发明实施例七第一示意图 ，而图 14和图 15为本发明实施例七电 路的信号波形图 ；本实施例中 ，第一下拉维持信号 LC1和第二下拉维持信号 LC2 为低频信号，低频信号一则可以避免高频讯号在高低电平切换时， 电位变化对 GOA电路造成的些许信号的波动，二则配合下拉维持模块的架构，可以使得对 于 LC1和 LC2的脉冲周期不存在必要限制，只要求 LC1和 LC2的电位互补即 可，其中 ，以其信号切换时间选择在每帧画面之间的空白时间（ Blacnking Time ) 为佳，如此不会出现由于下拉维持信号和上拉控制信号波形不匹配而出现 GOA 电路失常甚至失效的危险，不容易出现问题，增强了 GOA电路的稳定性。
图 14 是本发明图 13 电路的信号波形图 ，该图所示为始终扫描信号占空比 40/60情况下的波形图 ，时钟扫描信号负责 Gate波形的高电位产生，下拉维持信 号 LC负责控制下拉维持电路部分的高低电位，比如 P(N)和 K(N)处，在工作期 间 ，其电位被拉到 LC的低电位，即 T32和 T42等多个用于下拉维持的 TFT的 控制端的电位在工作期间处于比 VSS更负的关态，保证 GOA电路的运行；基 准低电平信号 VSS则负责提供 Gate输出讯号的低电位和拉低 Q(N)、 S(N)、 T(N) 点，采用 40/60的占空比的话 Gate波形在关闭后会先被拉到时钟扫描信号 CK 的低电位 CKL , —般设计 CKL<VSS ,然后再被拉到基准低电平信号 VSS的电 位，这样可以产生三阶驱动 Gate讯号，有效地解决像素显示区域的 TFT的时钟 贯通效应的影像。
其中 ， STV为 GOA电路启动讯号。 GOA启动讯号 STV负责开启第一级或 者第一、 二级 GOA电路，而且一般还会设计用来拉低最后一级或最后两级的 Q 占
其他控制输出、 输入和下传、 上传信号均通过 GOA电路本身的运作来产生， 采用 40/60 Duty Ratio的高频时钟讯号时， Q点会呈现凸字型。
图 15是本发明图 13电路的信号波形图 ，图 15是基于图 14的改变，其主要 区别是：时钟扫描信号 CK的占空比为 50/50的时，其中波形上最大的区别在于 Q点的波形形状，而且 50/50的占空比可以改善 Q点在时钟扫描信号切换间隙 的漏电行为 ，增加 Gate的打开时间。
实施例八：
图 16为本发明实施例八的示意图 ，与实施例七相比，其主要区别点在于， 第六可控开关 T52和第十三可控开关 T62的输出端分别耦合于第二下拉维持信 号 LC2和第一下拉维持信号 LC1 ,可以使得第六可控开关 T52和第十三可控开 关 T62能够辅助的，将第一可控开关 T32、 第二可控开关 Τ42、 第八可控开关 Τ33和第九可控开关 Τ43 的控制端拉低至更低的电位，从而使其处于更负的关 态，改善漏电。
图 17为本发明图 16的电路的信号波形图 ，与图 15相比，其中增加了 S(N) 和 TXN)处的信号波形图。 实施例九：
图 18为本发明一种液晶显示装置的示意图 ，液晶显示装置 2包括扫描驱动 电路 1 ,扫描驱动电路 1设置在液晶显示装置 2的两端，该扫描驱动电路 1为本 发明任 _ _种扫描驱动电路。
以上内容是结合具体的优选实施方式对本发明所作的进一步详细说明 ，不能 认定本发明的具体实施只局限于这些说明。 对于本发明所属技术领域的普通技 术人员来说，在不脱离本发明构思的前提下，还可以做出若干简单推演或替换， 都应当视为属于本发明的保护范围。

Claims

权 利 要 求
1.一种扫描驱动电路，包括上拉模块（ 200 驱动上拉模块（ 200 )的上拉 控制模块（ 100 下拉维持模块（ 10 )和基准低电平信号（ VSS )；所述上拉模 块（ 200 )的输出端耦合于当前扫描线（ G(N) )；所述上拉控制模块（ 100 )的输 出端 (Q(N))和当前扫描线（ G(N) )通过下拉维持模块（ 10 )耦合于所述基准低电 平信号（ VSS )；所述扫描驱动电路还包括下拉维持信号（ LC ) ,所述下拉维持 信号（ LC )耦合于所述下拉维持模块（ 10 )的控制端；
所述扫描驱动电路还包括下传模块（ 300 ) ,所述下传模块（ 300 )的控制端 连接于所述上拉控制模块（ 100 )的输出端 (Q(N)) , 同时，连接于所述上拉模块 ( 200 )的控制端，所述下传模块（ 300 )的输出端输出当前下传信号（ ST(N)
2.如权利要求 1所述的一种扫描驱动电路，其中 ，所述下拉维持模块（ 10 ) 包括第一下拉维持模块（ 600 )和第二下拉维持模块（ 700 )；所述第一下拉维持 模块（ 600 )和第二下拉维持模块（ 700 )的输入端耦合于所述上拉控制模块（ 100 ) 的输出端（ Q(N) ) ,所述第一下拉维持模块（ 600 )和第二下拉维持模块（ 700 ) 的控制端耦合于所述下拉维持信号（ LC ) ,所述第一下拉维持模块（ 600 )和第 二下拉维持模块（ 700 )的输出端耦合于所述基准低电平信号 (VSS)；
所述扫描驱动电路还包括切换开关（ T55 ) ,所述切换开关（ T55 )连接于所 述第一下拉维持模块（ 600 )的控制端和第二下拉维持模块（ 700 )的控制端之 间 ，所述切换开关（ T55 )的控制端耦合于所述上拉控制模块（ 100 )的输出端 ( Q(N) )；
当前扫描线（ G(N) )处于工作时间内 ，所述切换开关（ T55 )将所述第一下 拉维持模块（ 600 )和第二下拉维持模块（ 700 )关断，从而将所述上拉控制模 块（ 100 )的输出端（ Q(N) 当前扫描线（ G(N) )与所述基准低电平信号 (VSS) 的连通断开。
3.如权利要求 1所述的一种扫描驱动电路，其中 ，所述下拉维持模块（ 10 ) 包括第一下拉维持模块（ 600 ) ,所述第一下拉维持模块（ 600 )包括第一下拉维 持单元（ 610 )和驱动第一下拉维持单元（ 610 )的第一下拉维持控制单元（ 620 )； 所述第一下拉维持单元（ 610 )包括第一可控开关（ T32 )和第二可控开关 (T42) , 所述下拉维持信号（ LC )包括第一下拉维持信号（ LC1 ) ,所述第一下拉维持信 号 (LC1)通过所述第一下拉维持控制单元（ 620 )耦合于所述第一可控开关 (T32) 和第二可控开关 (T42)的控制端；所述当前扫描线（ G(N) )通过所述第一可控开 关 (T32)耦合于所述基准低电平信号（ VSS ) ,所述上拉控制模块（ 100 )的输出 端 (Q(N))通过所述第二可控开关 (T42)耦合于所述基准低电平信号（ VSS ) ;
所述下传模 300 括第十九可控开^ ( T22 )所述第十九可控开^ ( T22 ) 的控制端连接于所述上拉控制模块（ 100 )的输出端 (Q(N)) ,同时，连接于所述 上拉模块（ 200 )的控制端，所述第十九可控开关（ T22 )的输入端耦合于时钟 扫描信号（ CK ) ,所述第十九可控开关（ T22 )的输出端输出当前下传信号 ( ST(N) )；
所述第一下拉维持单元（ 610 )还包括第七可控开关（ T72 ) ,所述第七可控 开关（ 172 )的控制端耦合于所述第一可控开关 (T32)和第二可控开关 (T42)的控 制端，所述第七可控开关（ ΊΊ2 )的输入端耦合于所述第十九可控开关（ T22 ) 的输出端 ，所述第七可控开关（ T72 )的输出端耦合于所述基准低电平信号 ( VSS )；
当前扫描线（ G(N) )处于非工作时间内 ，所述第一下拉维持控制单元（ 620 ) 根据所述第一下拉维持信号（ LC1 )控制所述第一可控开关（ T32 第二可控开 关 (T42)和第七可控开关（ T72 )导通，所述第一可控开关（ T32 )将所述当前扫 描线（ G(N) )与基准低电平信号（ VSS )连通，所述第二可控开关 (T42)将上拉 控制模块（ 100 )的输出端 (Q(N))与基准低电平信号（ VSS )连通，所述第七可 控开关（ ΊΊ2 )将所述第十九可控开关（ T22 )的输出端和所述基准低电平信号 ( VSS )连通；
当前扫描线（ G(N) )处于工作时间内 ，所述第一下拉维持控制单元（ 620 ) 根据第一下拉维持信号 (LCI)控制所述第一可控开关（ T32 第二可控开关 (T42) 断开，所述第一可控开关（ T32 )将所述当前扫描线（ G(N) )与基准低电平信号 ( VSS )的连通断开，所述第二可控开关 (T42)将所述上拉控制模块（ 100 )的输 出端 (Q(N))与基准低电平信号（ VSS )的连通断开，所述第七可控开关（ ΊΊ2 ) 将所述第十九可控开关（ T22 )的输出端与基准低电平信号（ VSS )的连通断开。
4.如权利要求 3所述的一种扫描驱动电路，其中 ，所述第一下拉维持控制单 元（ 620 )包括第三可控开关（ T51 第四可控开关（ T53 )和第五可控开关（ T54 )； 所述下拉维持信号 (LC)还包括与第一下拉维持信号（ LC1 )逻辑相反的第二下拉 维持信号（ LC2 )；所述第三可控开关（ T51 )采用二极管接法，所述第三可控开 关（ T51 )的输入端和控制端耦合于所述第一下拉维持信号（ LC1 ) ,所述第三可 控开关（ T51 )的输出端耦合于所述第四可控开关（ T53 )的控制端；所述第四 可控开关（ T53 )的输入端耦合于所述第一下拉维持信号 (LC1) ,所述第四可控 开关（ T53 )的输出端耦合于所述第一可控开关和第二可控开关的控制端；所述 第五可控开关（ T54 )的控制端耦合于所述第二下拉维持信号（ LC2 ) ,所述第五 可控开关（ T54 )的输入端耦合于所述第一下拉维持信号 (LC1) ,所述第五可控 开关（ T54 )的输出端耦合于所述第一可控开关 (T32)和第二可控开关 (T42)的控 制端。
5.如权利要求 4所述的一种扫描驱动电路，其中 ，所述下拉维持模块（ 10 ) 还包括关断单元（ 900 ) ,所述关断单元（ 900 )包括第六可控开关（ T52 ) ,所述 第六可控开关（ T52 )的控制端耦合于所述上拉控制模块（ 100 )的输出端 (Q(N)) , 所述第六可控开关（ T52 )的输入端耦合于所述第四可控开关（ T53 )的控制端， 所述第六可控开关（ T52 )的输出端耦合于所述基准低电平信号（ VSS )o
6.如权利要求 4所述的一种扫描驱动电路，其中 ，所述下拉维持模块（ 10 ) 还包括关断单元（ 900 ) ,所述关断单元（ 900 )包括第六可控开关（ T52 ) ,所述 第六可控开关（ T52 )的控制端耦合于所述上拉控制模块（ 100 )的输出端 (Q(N)) , 所述第六可控开关（ T52 )的输入端耦合于所述第四可控开关（ T53 )的控制端， 所述第六可控开关（ T52 )的输出端耦合于所述第二下拉维持信号（ LC2 )b
7.如权利要求 3所述的一种扫描驱动电路，其中 ，所述下拉维持模块（ 10 ) 还包括第二下拉维持模块（ 700 ) ,所述第二下拉维持模块（ 700 )包括第二下拉 维持单元（ 710 驱动第二下拉维持单元（ 710 )的第二下拉维持控制单元（ 720 ) , 所述下拉维持信号 (LC)还包括与第一下拉维持信号（ LC1 )逻辑相反的第二下拉 维持信号（ LC2 )；所述第二下拉维持单元（ 710 )包括第八可控开关（ T33 )和 第九可控开关（ T43 )；第二下拉维持信号 (LC2)通过第二下拉维持控制单元（ 720 ) 耦合于所述第八可控开关 (T33)和第九可控开关 (T43)的控制端；所述当前扫描线 ( G(N) )通过所述第八可控开关 (T33)耦合于所述基准低电平信号（ VSS ) ,所述 上拉控制模块（ 100 )的输出端 (Q(N))通过所述第九可控开关 (T43)耦合于所述基 准低电平信号（ VSS ) ;
当前扫描线（ G(N) )处于非工作时间内 ，所述第一下拉维持单元（ 610 )和 第二下拉维持单元（ 710 )交替导通， 当第二下拉维持单元（ 710 )导通时，所 述第八可控开关 (T33)和第九可控开关 (T43)导通，将所述上拉控制模块（ 100 ) 的输出端 (Q(N))与基准低电平信号（ VSS )连通，将所述当前扫描线（ G(N) )与 基准低电平信号（VSS )连通；
当前扫描线（ G(N) )处于工作时间内 ，所述第一下拉维持单元（ 610 )和第 二下拉维持单元（ 710 )均断开，所述第一可控开关（ T32 第二可控开关 (T42)、 第八可控开关 (Τ33)和第九可控开关 (Τ43)断开，将所述上拉控制模块（ 100 )的 输出端 (Q(N))与基准低电平信号（ VSS )的连通断开，将所述当前扫描线（ G(N) ) 与基准低电平信号（ VSS )的连通断开。
8.如权利要求 7所述的一种扫描驱动电路，其中 ，所述第二下拉维持控制单 元（ 720 )还包括第十可控开关（ T61 第十一可控开关（ T63 )和第十二可控 开关（ T64 ) ;所述第十可控开关（ T61 )采用二极管接法，所述第十可控开关（ T61 ) 的输入端和控制端耦合于所述第二下拉维持信号（ LC2：) ,所述第十可控开关 ( T61 )的输出端耦合于第十一可控开关（ T63 )的控制端；所述第十一可控开 关（ T63 )的控制端耦合于所述第十可控开关（ T61 )的输出端，所述第十一可 控开关（ T63 )的输入端耦合于所述第二下拉维持信号，所述第十一可控开关 ( T63 )的输出端耦合于所述第八可控开关 (T33)和第九可控开关 (T43)的控制端； 所述第十二可控开关（ T64 )的控制端耦合于所述第一下拉维持信号（ LC1 ) ,所 述第十二可控开关（ T64 )的输入端耦合于所述第二下拉维持信号（ LC2 ) ,所述 第十二可控开关（ T64 )的输出端耦合于所述第八可控开关 (T33)和第九可控开关 (T43)的控制端；
当前扫描线（ G(N) )处于非工作时间内 ，所述第二下拉维持模块（ 700 )导 通时，所述第十可控开关（ T61 第十一可控开关（ T63 )和第十二可控开关（ T64 ) 根据所述第一下拉维持信号（ LC1 )和第二下拉维持信号（ LC2 ) ,控制所述第 八可控开关 (T33)和第九可控开关 (T43)导通，将所述上拉控制模块（ 100 )的输 出端 (Q(N))与基准低电平信号（ VSS )连通，将所述当前扫描线（ G(N) )与基准 低电平信号（ VSS )连通。
9.如权利要求 7 所述的一种扫描驱动电路，其中 ，所述基准低电平信号 ( VSS )包括第一基准低电平信号（ VSS1 )和第二基准低电平信号（ VSS2 ) 所述第二基准低电平信号（ VSS2 )的电位低于所述第一基准低电平信号（ VSS1 ) , 所述下拉维持信号（ LC )的低电平的电位低于所述第二基准低电平（ VSS2 )的 电位；所述当前扫描线（ G(N) )通过所述第八可控开关 (T33)耦合于所述第一基 准低电平信号（ VSS1 ) ,所述上拉控制模块（ 100 )的输出端 (Q(N))通过所述第 九可控开关 (T43)耦合于所述第二基准低电平信号（ VSS2 )
当前扫描线（ G(N) )处于非工作时间内 ，所述第二下拉维持模块（ 700 ) 导通时，所述第八可控开关（ T33 )和第九可控开关 (T43)导通，所述第八可控开 关 (T33)将所述当前扫描线（ G(N) )和第一基准低电平信号（ VSS 1 )连通，所述 第九可控开关 (T43)将所述上拉控制模块（ 100 )的输出端 (Q(N))和所述第二基准 低电平信号（ VSS2 )连通。
10.如权利要求 7所述的一种扫描驱动电路，其中 ，所述下拉维持模块（ 10 ) 还包括关断单元（ 900 ) ,所述关断单元（ 900 )包括第十三可控开关（ T62 )；所 述基准低电平信号（ VSS )包括第一基准低电平信号（ VSS1 )和第二基准低电 平信号（ VSS2 )；所述第二基准低电平信号（ VSS2 )的电位低于所述第一基准 低电平信号（ VSS1 ) ,所述下拉维持信号 (LC)的低电平时电位低于所述第二基准 低电平 (VSS2)的电位；所述当前扫描线（ G(N) )通过所述第八可控开关 (T33)耦 合于所述第一基准低电平信号（ VSS1 ) ,所述上拉控制模块（ 100 )的输出端 (Q(N)) 通过所述第九可控开关 (T43)耦合于所述第二基准低电平信号（ VSS2 ) ;所述第 十三可控开关 (T62)的输入端耦合于所述第八可控开关 (T33)和第九可控开关 (T43)的控制端，所述第十三可控开关（ T62 )的输出端耦合于所述第一基准电平 信号（ VSS1 )或第二基准电平信号 (VSS2)或第二下拉维持信号 (LC2)；而所述第 —可控开关（ T32 )的输出端耦合于所述第一基准低电平信号 (VSS1) ,所述第二 可控开关（ T42 第七可控开关（ ΊΊ2 )的输出端耦合于所述第二基准低电平信 号 ( VSS2 )b
11.如权利要求 7所述的一种扫描驱动电路，其中 ，所述第二下拉维持单元 ( 710 )还包括第十四可控开关（ T73 ) ;所述第十四可控开关（ T73 )的控制端 耦合于所述第八可控开关（ T33 )和第九可控开关 (T43)的控制端，所述第十四可 控开关（ T73 )的输入端耦合于所述第十九可控开关（ T22 )的输出端，所述第 十四可控开关（ T73 )的输出端耦合于所述基准低电平信号（ VSS ) ;
当前扫描线（ G(N) )处于非工作时间内 ，所述第二下拉维持单元（ 710 )导 通时，所述第十四可控开关（ T73 )导通，将所述第十九可控开关（ T22 )的输 出端和所述基准低电平信号（ VSS )连通；
当前扫描线（ G(N) )处于工作时间内 ，所述第二下拉维持单元（ 710 )断开， 所述第十四可控开关断开，将所述第十九可控开关（ T22 )的输出端和所述基准 低电平信号（ VSS )的连通断开。
12.如权利要求 7所述的一种扫描驱动电路，其中 ，所述下拉维持模块（ 10 ) 还包括切换开关（ T55 ) ,所述切换开关（ T55 )的控制端耦合于所述上拉控制模 块（ 100 )的输出端 (Q(N))，所述切换开关（ T55 )设置在所述第一可控开关（ T32 ) 和第二可控开关（ T42 )的控制端与所述第八可控开关（ T33 )和第九可控开关 (T43)的控制端之间 ；
在当前扫描线（ G(N) )处于工作时间内 ，所述切换开关（ T55 )导通，从而 将所述第一下拉维持单元（ 610 )和第二下拉维持单元（ 710 )的控制端连通， 所述第一下拉维持单元（ 610 )和第二下拉维持单元（ 710 )的控制端中处于低 电位的一端，将处于高电位的另一端拉低，从而将所述一下拉维持单元（ 610 ) 和第二下拉维持单元（ 710 )关断。
13. 如权利要求 1所述的一种扫描驱动电路，其中 所述上拉控制模 100 ) 包括第十七可控开关（ T11 )；所述第十七可控开关（ T11 )的输出端耦合于所述 上拉模块（ 200 )的控制端，所述第十七可控开关（ T11 )的控制端耦合于上级 下传信号 (ST(N-2)) ,所述第十七可控开关（ T11 )的输入端耦合于上级扫描线
( G(N-2) )或所述上级下传信号 (ST(N-2))；所述上拉模块（ 200 )包括第十八可 控开关（ T21 ) ,所述第十八可控开关（ T21 )的控制端耦合于所述上拉控制模块
( 100 )的输出端 (Q(N)) ,所述第十八可控开关（ T21 )的输入端耦合于时钟扫描 信号（ CK )，所述第十八可控开关（ T21 )的输出端耦合于所述当前扫描线（ G(N) )； 所述扫描驱动电路还包括下拉模块（ 400 ) ,所述下拉模块（ 400 )包括第二十可 控开关（ T31 )和第二十一可控开关（ T41 ) ,所述第二十可控开关（ T31 )和第 二十一可控开关（ T41 )的控制端耦合于下级扫描线（ G(N+2) ) ;所述第二十可 控开关（ T31 )的输入端耦合于所述当前扫描线（ G(N) ) ,所述第二十可控开关
( T31 )的输出端耦合于所述基准低电平信号（ VSS )；所述第二十一可控开关
( T41 )的输入端耦合于所述上拉控制模块（ 100 )的输出端 (Q(N)) ,所述第二十 —可控开关的输出端耦合于所述基准低电平信号（ VSS ) ;所述扫描驱动电路还 包括储能电^ ( Cb )所述储能电 ¾ Cb )½第一端耦合于所述上拉控制模 100 ) 的输出端 (Q(N)) ,所述储能电容（ Cb )的第二端分别耦合于所述上拉模块（ 200 ) 的输出端和所述下拉维持模块（ 10 )o
14. 如权利要求 2所述的一种扫描驱动电路，其中 所述上拉控制模 100 ) 包括第十七可控开关（ T11 )；所述第十七可控开关（ T11 )的输出端耦合于所述 上拉模块（ 200 )的控制端，所述第十七可控开关（ T11 )的控制端耦合于上级 下传信号 (ST(N-2)) ,所述第十七可控开关（ T11 )的输入端耦合于上级扫描线 ( G(N-2) )或所述上级下传信号 (ST(N-2))；所述上拉模块（ 200 )包括第十八可 控开关（ T21 ) ,所述第十八可控开关（ T21 )的控制端耦合于所述上拉控制模块 ( 100 )的输出端 (Q(N)) ,所述第十八可控开关（ T21 )的输入端耦合于时钟扫描 信号（ CK )，所述第十八可控开关（ T21 )的输出端耦合于所述当前扫描线（ G(N) )； 所述扫描驱动电路还包括下拉模块（ 400 ) ,所述下拉模块（ 400 )包括第二十可 控开关（ T31 )和第二十一可控开关（ T41 ) ,所述第二十可控开关（ T31 )和第 二十一可控开关（ T41 )的控制端耦合于下级扫描线（ G(N+2) ) ;所述第二十可 控开关（ T31 )的输入端耦合于所述当前扫描线（ G(N) ) ,所述第二十可控开关 ( T31 )的输出端耦合于所述基准低电平信号（ VSS )；所述第二十一可控开关 ( T41 )的输入端耦合于所述上拉控制模块（ 100 )的输出端 (Q(N)) ,所述第二十 —可控开关的输出端耦合于所述基准低电平信号（ VSS ) ;所述扫描驱动电路还 包括储能电^ ( Cb )所述储能电 ¾ Cb )½第一端耦合于所述上拉控制模 100 ) 的输出端 (Q(N)) ,所述储能电容（ Cb )的第二端分别耦合于所述上拉模块（ 200 ) 的输出端和所述下拉维持模块（ 10 )o
15. 如权利要求 3所述的一种扫描驱动电路，其中 所述上拉控制模 100 ) 包括第十七可控开关（ T11 )；所述第十七可控开关（ T11 )的输出端耦合于所述 上拉模块（ 200 )的控制端，所述第十七可控开关（ T11 )的控制端耦合于上级 下传信号 (ST(N-2)) ,所述第十七可控开关（ T11 )的输入端耦合于上级扫描线 ( G(N-2) )或所述上级下传信号 (ST(N-2))；所述上拉模块（ 200 )包括第十八可 控开关（ T21 ) ,所述第十八可控开关（ T21 )的控制端耦合于所述上拉控制模块 ( 100 )的输出端 (Q(N)) ,所述第十八可控开关（ T21 )的输入端耦合于时钟扫描 信号（ CK )，所述第十八可控开关（ T21 )的输出端耦合于所述当前扫描线（ G(N) )； 所述扫描驱动电路还包括下拉模块（ 400 ) ,所述下拉模块（ 400 )包括第二十可 控开关（ T31 )和第二十一可控开关（ T41 ) ,所述第二十可控开关（ T31 )和第 二十一可控开关（ T41 )的控制端耦合于下级扫描线（ G(N+2) ) ;所述第二十可 控开关（ T31 )的输入端耦合于所述当前扫描线（ G(N) ) ,所述第二十可控开关 ( T31 )的输出端耦合于所述基准低电平信号（ VSS )；所述第二十一可控开关 ( T41 )的输入端耦合于所述上拉控制模块（ 100 )的输出端 (Q(N)) ,所述第二十 —可控开关的输出端耦合于所述基准低电平信号（ VSS ) ;所述扫描驱动电路还 包括储能电^ ( Cb )所述储能电 ¾ Cb )½第一端耦合于所述上拉控制模 100 ) 的输出端 (Q(N)) ,所述储能电容（ Cb )的第二端分别耦合于所述上拉模块（ 200 ) 的输出端和所述下拉维持模块（ 10 )o
16. 如权利要求 7所述的一种扫描驱动电路，其中 所述上拉控制模 100 ) 包括第十七可控开关（ T11 )；所述第十七可控开关（ T11 )的输出端耦合于所述 上拉模块（ 200 )的控制端，所述第十七可控开关（ T11 )的控制端耦合于上级 下传信号 (ST(N-2)) ,所述第十七可控开关（ T11 )的输入端耦合于上级扫描线 ( G(N-2) )或所述上级下传信号 (ST(N-2))；所述上拉模块（ 200 )包括第十八可 控开关（ T21 ) ,所述第十八可控开关（ T21 )的控制端耦合于所述上拉控制模块 ( 100 )的输出端 (Q(N)) ,所述第十八可控开关（ T21 )的输入端耦合于时钟扫描 信号（ CK )，所述第十八可控开关（ T21 )的输出端耦合于所述当前扫描线（ G(N) )； 所述扫描驱动电路还包括下拉模块（ 400 ) ,所述下拉模块（ 400 )包括第二十可 控开关（ T31 )和第二十一可控开关（ T41 ) ,所述第二十可控开关（ T31 )和第 二十一可控开关（ T41 )的控制端耦合于下级扫描线（ G(N+2) ) ;所述第二十可 控开关（ T31 )的输入端耦合于所述当前扫描线（ G(N) ) ,所述第二十可控开关 ( T31 )的输出端耦合于所述基准低电平信号（ VSS )；所述第二十一可控开关 ( T41 )的输入端耦合于所述上拉控制模块（ 100 )的输出端 (Q(N)) ,所述第二十 —可控开关的输出端耦合于所述基准低电平信号（ VSS ) ;所述扫描驱动电路还 包括储能电^ ( Cb )所述储能电 ¾ Cb )½第一端耦合于所述上拉控制模 100 ) 的输出端 (Q(N)) ,所述储能电容（ Cb )的第二端分别耦合于所述上拉模块（ 200 ) 的输出端和所述下拉维持模块（ 10 )o
17. 一种液晶显示装置，包括扫描驱动电路，所述扫描驱动电路包括上拉模 块（ 200 驱动上拉模块（ 200 )的上拉控制模块（ 100 下拉维持模块（ 10 ) 和基准低电平信号（ VSS )；所述上拉模块（ 200 )的输出端耦合于当前扫描线
( G(N) )；所述上拉控制模块（ 100 )的输出端 (Q(N))和当前扫描线（ G(N) )通 过下拉维持模块（ 10 )耦合于所述基准低电平信号（ VSS )；所述扫描驱动电路 还包括下拉维持信号（ LC ) ,所述下拉维持信号（ LC )耦合于所述下拉维持模 块（ 10 )的控制端；
所述扫描驱动电路还包括下传模块（ 300 ) ,所述下传模块（ 300 )的控制端 连接于所述上拉控制模块（ 100 )的输出端 (Q(N)) , 同时，连接于所述上拉模块
( 200 )的控制端，所述下传模块（ 300 )的输出端输出当前下传信号（ ST(N)
18.如权利要求 17所述的一种液晶显示装置，其中 ，所述下拉维持模块（ 10 ) 包括第一下拉维持模块（ 600 )和第二下拉维持模块（ 700 )；所述第一下拉维持 模块（ 600 )和第二下拉维持模块（ 700 )的输入端耦合于所述上拉控制模块（ 100 ) 的输出端（ Q(N) ) ,所述第一下拉维持模块（ 600 )和第二下拉维持模块（ 700 ) 的控制端耦合于所述下拉维持信号（ LC ) ,所述第一下拉维持模块（ 600 )和第 二下拉维持模块（ 700 )的输出端耦合于所述基准低电平信号 (VSS)；
所述扫描驱动电路还包括切换开关（ T55 ) ,所述切换开关（ T55 )连接于所 述第一下拉维持模块（ 600 )的控制端和第二下拉维持模块（ 700 )的控制端之 间 ，所述切换开关（ T55 )的控制端耦合于所述上拉控制模块（ 100 )的输出端 ( Q(N) )；
当前扫描线（ G(N) )处于工作时间内 ，所述切换开关（ T55 )将所述第一下 拉维持模块（ 600 )和第二下拉维持模块（ 700 )关断，从而将所述上拉控制模 块（ 100 )的输出端（ Q(N) 当前扫描线（ G(N) )与所述基准低电平信号 (VSS) 的连通断开。
19. 如权利要求 17所述的一种液晶显示装置，其中 所述下拉维持模 10 ) 包括第一下拉维持模块（ 600 ) ,所述第一下拉维持模块（ 600 )包括第一下拉维 持单元（ 610 )和驱动第一下拉维持单元（ 610 )的第一下拉维持控制单元（ 620 )； 所述第一下拉维持单元（ 610 )包括第一可控开关（ T32 )和第二可控开关 (T42) , 所述下拉维持信号（ LC )包括第一下拉维持信号（ LC1 ) ,所述第一下拉维持信 号 (LC1)通过所述第一下拉维持控制单元（ 620 )耦合于所述第一可控开关 (T32) 和第二可控开关 (T42)的控制端；所述当前扫描线（ G(N) )通过所述第一可控开 关 (T32)耦合于所述基准低电平信号（ VSS ) ,所述上拉控制模块（ 100 )的输出 端 (Q(N))通过所述第二可控开关 (T42)耦合于所述基准低电平信号（ VSS ) ;
所述下传模 300 括第十九可控开^ ( T22 )所述第十九可控开^ ( T22 ) 的控制端连接于所述上拉控制模块（ 100 )的输出端 (Q(N)) ,同时，连接于所述 上拉模块（ 200 )的控制端，所述第十九可控开关（ T22 )的输入端耦合于时钟 扫描信号（ CK ) ,所述第十九可控开关（ T22 )的输出端输出当前下传信号 ( ST(N) )；
所述第一下拉维持单元（ 610 )还包括第七可控开关（ T72 ) ,所述第七可控 开关（ 172 )的控制端耦合于所述第一可控开关 (T32)和第二可控开关 (T42)的控 制端，所述第七可控开关（ ΊΊ2 )的输入端耦合于所述第十九可控开关（ T22 ) 的输出端 ，所述第七可控开关（ T72 )的输出端耦合于所述基准低电平信号 ( VSS )；
当前扫描线（ G(N) )处于非工作时间内 ，所述第一下拉维持控制单元（ 620 ) 根据所述第一下拉维持信号（ LC1 )控制所述第一可控开关（ T32 第二可控开 关 (T42)和第七可控开关（ T72 )导通，所述第一可控开关（ T32 )将所述当前扫 描线（ G(N) )与基准低电平信号（ VSS )连通，所述第二可控开关 (T42)将上拉 控制模块（ 100 )的输出端 (Q(N))与基准低电平信号（ VSS )连通，所述第七可 控开关（ ΊΊ2 )将所述第十九可控开关（ T22 )的输出端和所述基准低电平信号 ( VSS )连通； 当前扫描线（ G(N) )处于工作时间内 ，所述第一下拉维持控制单元（ 620 ) 根据第一下拉维持信号 (LC1)控制所述第一可控开关（ T32 第二可控开关 (T42) 断开，所述第一可控开关（ T32 )将所述当前扫描线（ G(N) )与基准低电平信号 ( VSS )的连通断开，所述第二可控开关 (T42)将所述上拉控制模块（ 100 )的输 出端 (Q(N))与基准低电平信号（ VSS )的连通断开，所述第七可控开关（ ΊΊ2 ) 将所述第十九可控开关（ T22 )的输出端与基准低电平信号（ VSS )的连通断开； 所述第一下拉维持控制单元（ 620 )包括第三可控开关（ T51 第四可控开 关（ T53 )和第五可控开关（ T54 )；所述下拉维持信号 (LC)还包括与第一下拉维 持信号（ LC1 )逻辑相反的第二下拉维持信号（ LC2 )；所述第三可控开关（ T51 ) 采用二极管接法，所述第三可控开关（ T51 )的输入端和控制端耦合于所述第一 下拉维持信号（ LC1 ) ,所述第三可控开关（ T51 )的输出端耦合于所述第四可控 开关（ T53 )的控制端；所述第四可控开关（ T53 )的输入端耦合于所述第一下 拉维持信号 (LC1) ,所述第四可控开关（ T53 )的输出端耦合于所述第一可控开 关和第二可控开关的控制端；所述第五可控开关（ T54 )的控制端耦合于所述第 二下拉维持信号（ LC2 ) ,所述第五可控开关（ T54 )的输入端耦合于所述第一下 拉维持信号 (LC1) ,所述第五可控开关（ T54 )的输出端耦合于所述第一可控开 关 CT32)和第二可控开关 ΓΓ42)的控制端；
所述下拉维持模块（ 10 )还包括关断单元（ 900 ) ,所述关断单元（ 900 )包 括第六可控开关（ T52 ) ,所述第六可控开关（ T52 )的控制端耦合于所述上拉控 制模块（ 100 )的输出端 (Q(N)) ,所述第六可控开关（ T52 )的输入端耦合于所述 第四可控开关（ T53 )的控制端，所述第六可控开关（ T52 )的输出端耦合于所 述基准低电平信号（ VSS )或第二下拉维持信号（ LC2 )o
20. 如权利要求 19所述的一种液晶显示装置，其中 ，所述下拉维持模块（ 10 ) 还包括第二下拉维持模块（ 700 ) ,所述第二下拉维持模块（ 700 )包括第二下拉 维持单元（ 710 驱动第二下拉维持单元（ 710 )的第二下拉维持控制单元（ 720 ) , 所述下拉维持信号 (LC)还包括与第一下拉维持信号（ LC1 )逻辑相反的第二下拉 维持信号（ LC2 )；所述第二下拉维持单元（ 710 )包括第八可控开关（ T33 )和 第九可控开关（ T43 )；第二下拉维持信号 (LC2)通过第二下拉维持控制单元（ 720 ) 耦合于所述第八可控开关 (T33)和第九可控开关 (T43)的控制端；所述当前扫描线 ( G(N) )通过所述第八可控开关 (T33)耦合于所述基准低电平信号（ VSS ) ,所述 上拉控制模块（ 100 )的输出端 (Q(N))通过所述第九可控开关 (T43)耦合于所述基 准低电平信号（ VSS ) ;
当前扫描线（ G(N) )处于非工作时间内 ，所述第一下拉维持单元（ 610 )和 第二下拉维持单元（ 710 )交替导通， 当第二下拉维持单元（ 710 )导通时，所 述第八可控开关 (T33)和第九可控开关 (T43)导通，将所述上拉控制模块（ 100 ) 的输出端 (Q(N))与基准低电平信号（ VSS )连通，将所述当前扫描线（ G(N) )与 基准低电平信号（VSS )连通；
当前扫描线（ G(N) )处于工作时间内 ，所述第一下拉维持单元（ 610 )和第 二下拉维持单元（ 710 )均断开，所述第一可控开关（ T32 第二可控开关 (T42)、 第八可控开关 (Τ33)和第九可控开关 (Τ43)断开，将所述上拉控制模块（ 100 )的 输出端 (Q(N))与基准低电平信号（ VSS )的连通断开，将所述当前扫描线（ G(N) ) 与基准低电平信号（ VSS )的连通断开；
所述第二下拉维持控制单元（ 720 )还包括第十可控开关（ T61 X 第十一可 控开关（ T63 )和第十二可控开关（ T64 ) ;所述第十可控开关（ T61 )采用二极 管接法，所述第十可控开关（ T61 )的输入端和控制端耦合于所述第二下拉维持 信号（ LC2 ) ,所述第十可控开关（ T61 )的输出端耦合于第十一可控开关（ T63 ) 的控制端；所述第十一可控开关（ T63 )的控制端耦合于所述第十可控开关（ T61 ) 的输出端，所述第十一可控开关（ T63 )的输入端耦合于所述第二下拉维持信号， 所述第十一可控开关（ T63 )的输出端耦合于所述第八可控开关 (T33)和第九可控 开关 (T43)的控制端； 所述第十二可控开关（ T64 )的控制端耦合于所述第一下 拉维持信号（ LC1 ) ,所述第十二可控开关（ T64 )的输入端耦合于所述第二下拉 维持信号（ LC2 ) ,所述第十二可控开关（ T64 )的输出端耦合于所述第八可控开 关 CT33)和第九可控开关 CT43)的控制端；
当前扫描线（ G(N) )处于非工作时间内 ，所述第二下拉维持模块（ 700 )导 通时，所述第十可控开关（ T61 第十一可控开关（ T63 )和第十二可控开关（ T64 ) 根据所述第一下拉维持信号（ LC1 )和第二下拉维持信号（ LC2 ) ,控制所述第 八可控开关 (T33)和第九可控开关 (T43)导通，将所述上拉控制模块（ 100 )的输 出端 (Q(N))与基准低电平信号（ VSS )连通，将所述当前扫描线（ G(N) )与基准 低电平信号（ VSS )连通；
所述基准低电平信号（ VSS )包括第一基准低电平信号（ VSS1 )和第二基 准低电平信号（ VSS2 ) ；所述第二基准低电平信号（ VSS2 )的电位低于所述 第一基准低电平信号（ VSS1 ) ,所述下拉维持信号（ LC )的低电平的电位低于 所述第二基准低电平（ VSS2 )的电位；所述当前扫描线（ G(N) )通过所述第八 可控开关 (T33)耦合于所述第一基准低电平信号（ VSS1 ) ,所述上拉控制模块 ( 100 )的输出端 (Q(N))通过所述第九可控开关 (T43)耦合于所述第二基准低电平 信号（ VSS2 )；
当前扫描线（ G(N) )处于非工作时间内 ，所述第二下拉维持模块（ 700 )导 通时，所述第八可控开关（ T33 )和第九可控开关 (T43)导通，所述第八可控开关 (T33)将所述当前扫描线（ G(N) )和第一基准低电平信号（ VSS1 )连通，所述第 九可控开关 (T43)将所述上拉控制模块（ 100 )的输出端 (Q(N))和所述第二基准低 电平信号（ VSS2 )连通；
所述下拉维持模块（ 10 )还包括关断单元（ 900 ) ,所述关断单元（ 900 )包 括第十三可控开关（ T62 )；所述基准低电平信号（ VSS )包括第一基准低电平 信号（ VSS1 )和第二基准低电平信号（ VSS2 )；所述第二基准低电平信号（ VSS2 ) 的电位低于所述第一基准低电平信号（ VSS1 ) ,所述下拉维持信号 (LC)的低电平 时电位低于所述第二基准低电平 (VSS2)的电位；所述当前扫描线（ G(N) )通过 所述第八可控开关 (T33)耦合于所述第一基准低电平信号（ VSS1 ) ,所述上拉控 制模块（ 100 )的输出端 (Q(N))通过所述第九可控开关 (T43)耦合于所述第二基准 低电平信号（ VSS2 ) ;所述第十三可控开关 (T62)的输入端耦合于所述第八可控 开关 (T33)和第九可控开关 (T43)的控制端，所述第十三可控开关（ T62 )的输出 端耦合于所述第一基准电平信号（ VSS1 )或第二基准电平信号 (VSS2)或第二下 拉维持信号 (LC2)；而所述第一可控开关（ T32 )的输出端耦合于所述第一基准 低电平信号 (VSS1) ,所述第二可控开关（ T42 第七可控开关（ T72 )的输出端 耦合于所述第二基准低电平信号（ VSS2 )；
所述第二下拉维持单元（ 710 )还包括第十四可控开关（ T73 )；所述第十四 可控开关（ T73 )的控制端耦合于所述第八可控开关（ T33 )和第九可控开关 (T43) 的控制端，所述第十四可控开关（ T73 )的输入端耦合于所述第十九可控开关 ( T22 )的输出端，所述第十四可控开关（ T73 )的输出端耦合于所述基准低电 平信号（ VSS )；
当前扫描线（ G(N) )处于非工作时间内 ，所述第二下拉维持单元（ 710 )导 通时，所述第十四可控开关（ T73 )导通，将所述第十九可控开关（ T22 )的输 出端和所述基准低电平信号（ VSS )连通；
当前扫描线（ G(N) )处于工作时间内 ，所述第二下拉维持单元（ 710 )断开， 所述第十四可控开关断开，将所述第十九可控开关（ T22 )的输出端和所述基准 低电平信号（ VSS )的连通断开；
所述下拉维持模块（ 10 )还包括切换开关（ T55 ) ,所述切换开关（ T55 )的 控制端耦合于所述上拉控制模块（ 100 )的输出端 (Q(N)) ,所述切换开关（ T55 ) 设置在所述第一可控开关（ T32 )和第二可控开关（ T42 )的控制端与所述第八 可控开关（ T33 )和第九可控开关 (T43)的控制端之间 ；
在当前扫描线（ G(N) )处于工作时间内 ，所述切换开关（ T55 )导通，从而 将所述第一下拉维持单元（ 610 )和第二下拉维持单元（ 710 )的控制端连通， 所述第一下拉维持单元（ 610 )和第二下拉维持单元（ 710 )的控制端中处于低 电位的一端，将处于高电位的另一端拉低，从而将所述一下拉维持单元（ 610 ) 和第二下拉维持单元（710 )关断； 所述上拉控制模块（ 100 )包括第十七可控开关（ T11 )；所述第十七可控开 关（ T11 )的输出端耦合于所述上拉模块（ 200 )的控制端，所述第十七可控开 关（ T11 )的控制端耦合于上级下传信号 (ST(N-2)) ,所述第十七可控开关（ T11 ) 的输入端耦合于上级扫描线（ G(N-2) )或所述上级下传信号 (ST(N-2))；所述上 拉模块（ 200 )包括第十八可控开关（ T21 ) ,所述第十八可控开关（ T21 )的控 制端耦合于所述上拉控制模 100 ^输出端 (Q(N))所述第十八可控开^ ( T21 ) 的输入端耦合于时钟扫描信号（ CK ) ,所述第十八可控开关（ T21 )的输出端耦 合于所述当前扫描线（ G(N) )；所述扫描驱动电路还包括下拉模块（ 400 ) ,所述 下拉模块（ 400 )包括第二十可控开关（ T31 )和第二十一可控开关（ T41 ) ,所 述第二十可控开关（ T31 )和第二十一可控开关（ T41 )的控制端耦合于下级扫 描线（ G(N+2) ) ;所述第二十可控开关（ T31 )的输入端耦合于所述当前扫描线 ( G(N) ) ,所述第二十可控开关（ T31 )的输出端耦合于所述基准低电平信号 ( VSS ) ;所述第二十一可控开关（ T41 )的输入端耦合于所述上拉控制模块（ 100 ) 的输出端 (Q(N)) ,所述第二十一可控开关的输出端耦合于所述基准低电平信号 ( VSS )；所述扫描驱动电路还包括储能电容（ Cb ) ,所述储能电容（ Cb )的第 —端耦合于所述上拉控制模块（ 100 )的输出端 (Q(N)) ,所述储能电容（ Cb )的 第二端分别耦合于所述上拉模块（ 200 )的输出端和所述下拉维持模块（ 10 )o
PCT/CN2014/080724 2014-05-20 2014-06-25 一种扫描驱动电路及液晶显示装置 Ceased WO2015176349A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US14/411,107 US9530372B2 (en) 2014-05-20 2014-06-25 Scan driving circuit and LCD device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201410213255.6A CN104008741A (zh) 2014-05-20 2014-05-20 一种扫描驱动电路及液晶显示装置
CN201410213255.6 2014-05-20

Publications (1)

Publication Number Publication Date
WO2015176349A1 true WO2015176349A1 (zh) 2015-11-26

Family

ID=51369370

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2014/080724 Ceased WO2015176349A1 (zh) 2014-05-20 2014-06-25 一种扫描驱动电路及液晶显示装置

Country Status (3)

Country Link
US (1) US9530372B2 (zh)
CN (1) CN104008741A (zh)
WO (1) WO2015176349A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190057665A1 (en) * 2017-08-16 2019-02-21 Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd. Goa driving cicuit and lcd device

Families Citing this family (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104008742B (zh) * 2014-05-20 2016-06-29 深圳市华星光电技术有限公司 一种扫描驱动电路及一种液晶显示装置
CN104008739B (zh) 2014-05-20 2017-04-12 深圳市华星光电技术有限公司 一种扫描驱动电路和一种液晶显示装置
CN104157259B (zh) * 2014-09-10 2016-06-22 深圳市华星光电技术有限公司 基于igzo制程的栅极驱动电路
CN104392701B (zh) * 2014-11-07 2016-09-14 深圳市华星光电技术有限公司 用于氧化物半导体薄膜晶体管的扫描驱动电路
CN104376824A (zh) * 2014-11-13 2015-02-25 深圳市华星光电技术有限公司 用于液晶显示的goa电路及液晶显示装置
CN104409058B (zh) * 2014-11-14 2017-02-22 深圳市华星光电技术有限公司 一种扫描驱动电路
CN104517575B (zh) 2014-12-15 2017-04-12 深圳市华星光电技术有限公司 移位寄存器及级传栅极驱动电路
CN104505050B (zh) * 2014-12-31 2017-02-01 深圳市华星光电技术有限公司 用于氧化物半导体薄膜晶体管的扫描驱动电路
CN104700801B (zh) * 2015-03-24 2016-11-02 深圳市华星光电技术有限公司 Pmos栅极驱动电路
CN104766584B (zh) * 2015-04-27 2017-03-01 深圳市华星光电技术有限公司 具有正反向扫描功能的goa电路
CN104934002B (zh) * 2015-06-04 2018-03-27 武汉华星光电技术有限公司 一种扫描驱动电路
CN105575349B (zh) * 2015-12-23 2018-03-06 武汉华星光电技术有限公司 Goa电路及液晶显示装置
CN105529006A (zh) * 2016-01-25 2016-04-27 武汉华星光电技术有限公司 一种栅极驱动电路以及液晶显示器
CN106205458A (zh) * 2016-08-30 2016-12-07 深圳市华星光电技术有限公司 一种goa驱动单元
CN106205538A (zh) * 2016-08-31 2016-12-07 深圳市华星光电技术有限公司 一种goa驱动单元及驱动电路
CN106157914B (zh) * 2016-08-31 2019-05-03 深圳市华星光电技术有限公司 一种栅极驱动电路
CN106297704B (zh) * 2016-08-31 2019-06-11 深圳市华星光电技术有限公司 一种栅极驱动电路
CN106157916A (zh) * 2016-08-31 2016-11-23 深圳市华星光电技术有限公司 一种栅极驱动单元及驱动电路
CN106251817B (zh) 2016-08-31 2019-01-18 深圳市华星光电技术有限公司 一种goa驱动电路
CN106448590B (zh) * 2016-10-11 2019-03-22 深圳市华星光电技术有限公司 一种液晶显示面板的goa电路及显示装置
CN106782394A (zh) * 2016-12-30 2017-05-31 深圳市华星光电技术有限公司 一种驱动电路及其下拉维持电路、显示装置
CN107424575A (zh) * 2017-08-01 2017-12-01 深圳市华星光电半导体显示技术有限公司 Goa驱动电路及液晶面板
US10283067B2 (en) 2017-08-01 2019-05-07 Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd. GOA driving circuit and LCD
CN107369422B (zh) * 2017-08-16 2019-12-03 深圳市华星光电半导体显示技术有限公司 一种goa驱动电路及液晶显示装置
CN109119036B (zh) * 2018-07-26 2020-07-28 深圳市华星光电技术有限公司 液晶面板
CN110322851B (zh) * 2019-05-21 2021-07-20 合肥维信诺科技有限公司 一种扫描驱动电路和显示面板
CN111192550B (zh) * 2020-02-26 2021-05-07 深圳市华星光电半导体显示技术有限公司 Goa电路和显示面板
CN111091775B (zh) * 2020-03-22 2020-09-01 深圳市华星光电半导体显示技术有限公司 一种显示面板以及电子设备

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110228893A1 (en) * 2010-03-18 2011-09-22 Mitsubishi Electric Corporation Shift register circuit
CN102982846A (zh) * 2012-07-18 2013-03-20 友达光电股份有限公司 用于光感应触控面板的移位暂存器
KR101345828B1 (ko) * 2012-06-28 2013-12-30 하이디스 테크놀로지 주식회사 쉬프트 레지스터 및 이를 이용한 게이트 구동회로
CN103745700A (zh) * 2013-12-27 2014-04-23 深圳市华星光电技术有限公司 自修复型栅极驱动电路
CN104008739A (zh) * 2014-05-20 2014-08-27 深圳市华星光电技术有限公司 一种扫描驱动电路和一种液晶显示装置
CN104008742A (zh) * 2014-05-20 2014-08-27 深圳市华星光电技术有限公司 一种扫描驱动电路及一种液晶显示装置

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4302535B2 (ja) * 2002-04-08 2009-07-29 サムスン エレクトロニクス カンパニー リミテッド ゲート駆動回路及びこれを有する液晶表示装置
KR101536218B1 (ko) * 2008-12-26 2015-07-13 삼성디스플레이 주식회사 게이트 구동회로, 이를 갖는 표시 장치 및 이 게이트 구동회로의 제조 방법
CN102129845B (zh) * 2010-01-14 2012-12-26 群康科技(深圳)有限公司 液晶面板驱动电路和液晶显示装置
CN101887757B (zh) * 2010-07-08 2014-03-26 友达光电股份有限公司 移位寄存器电路及移位寄存器
US8957882B2 (en) * 2010-12-02 2015-02-17 Samsung Display Co., Ltd. Gate drive circuit and display apparatus having the same
CN102682727B (zh) * 2012-03-09 2014-09-03 北京京东方光电科技有限公司 移位寄存器单元、移位寄存器电路、阵列基板及显示器件
TWI459368B (zh) * 2012-09-14 2014-11-01 Au Optronics Corp 顯示裝置及其閘極信號產生方法
TWI473059B (zh) * 2013-05-28 2015-02-11 Au Optronics Corp 移位暫存器電路
CN103660453A (zh) 2013-12-10 2014-03-26 吴江市品信纺织科技有限公司 一种高韧性无纺布
CN103680453B (zh) * 2013-12-20 2015-09-16 深圳市华星光电技术有限公司 阵列基板行驱动电路

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110228893A1 (en) * 2010-03-18 2011-09-22 Mitsubishi Electric Corporation Shift register circuit
KR101345828B1 (ko) * 2012-06-28 2013-12-30 하이디스 테크놀로지 주식회사 쉬프트 레지스터 및 이를 이용한 게이트 구동회로
CN102982846A (zh) * 2012-07-18 2013-03-20 友达光电股份有限公司 用于光感应触控面板的移位暂存器
CN103745700A (zh) * 2013-12-27 2014-04-23 深圳市华星光电技术有限公司 自修复型栅极驱动电路
CN104008739A (zh) * 2014-05-20 2014-08-27 深圳市华星光电技术有限公司 一种扫描驱动电路和一种液晶显示装置
CN104008742A (zh) * 2014-05-20 2014-08-27 深圳市华星光电技术有限公司 一种扫描驱动电路及一种液晶显示装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190057665A1 (en) * 2017-08-16 2019-02-21 Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd. Goa driving cicuit and lcd device
US10446102B2 (en) * 2017-08-16 2019-10-15 Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd GOA driving circuit and LCD device

Also Published As

Publication number Publication date
US20160284304A1 (en) 2016-09-29
US9530372B2 (en) 2016-12-27
CN104008741A (zh) 2014-08-27

Similar Documents

Publication Publication Date Title
WO2015176349A1 (zh) 一种扫描驱动电路及液晶显示装置
WO2015176347A1 (zh) 一种扫描驱动电路和一种液晶显示装置
WO2015176348A1 (zh) 一种扫描驱动电路及一种液晶显示装置
WO2015096245A1 (zh) 自修复型栅极驱动电路
JP6434620B2 (ja) 液晶表示用ｇｏａ回路及び液晶表示装置
CN105185294B (zh) 移位寄存器单元及其驱动方法、移位寄存器和显示装置
US10417985B2 (en) Double-side gate driver on array circuit, liquid crystal display panel, and driving method
CN106128397B (zh) 一种goa驱动单元及驱动电路
US10235958B2 (en) Gate driving circuits and liquid crystal devices
JP6419324B2 (ja) 酸化物半導体薄膜トランジスタにおけるスキャン駆動回路
CN103500550B (zh) 电压拉升电路、移位寄存器和栅极驱动模块
WO2015180198A1 (zh) 一种栅极驱动电路
TWI514362B (zh) 移位暫存器模組及驅動其之方法
WO2015096246A1 (zh) 用于平板显示的可修复的goa电路及显示装置
WO2015161513A1 (zh) 一种用于液晶显示的goa电路及液晶显示装置
WO2016106830A1 (zh) 一种goa电路及液晶显示装置
CN102184704B (zh) 移位缓存器及其驱动方法
WO2022252427A1 (zh) Goa电路及显示面板
CN105161060A (zh) 扫描驱动电路及具有该电路的液晶显示装置
CN205050536U (zh) 移位寄存器单元、移位寄存器和显示装置
CN104485065A (zh) 移位寄存器、驱动方法、栅极驱动电路
CN104409102B (zh) 移位寄存器
WO2015176327A1 (zh) 一种扫描驱动电路和一种液晶显示装置
CN103680450A (zh) 一种可实现信号双向传输的驱动电路及其移位寄存器
CN109427282A (zh) 显示器装置

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 14411107

Country of ref document: US

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

Ref document number: 14892236

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 14892236

Country of ref document: EP

Kind code of ref document: A1