WO2017028332A1 - 扫描驱动电路及具有该电路的液晶显示装置 - Google Patents

扫描驱动电路及具有该电路的液晶显示装置 Download PDF

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Publication number
WO2017028332A1
WO2017028332A1 PCT/CN2015/088376 CN2015088376W WO2017028332A1 WO 2017028332 A1 WO2017028332 A1 WO 2017028332A1 CN 2015088376 W CN2015088376 W CN 2015088376W WO 2017028332 A1 WO2017028332 A1 WO 2017028332A1
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Prior art keywords
controllable switch
pull
control
driving circuit
vss
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PCT/CN2015/088376
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English (en)
French (fr)
Inventor
戴超
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深圳市华星光电技术有限公司
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Priority to US14/888,425 priority Critical patent/US9767756B2/en
Publication of WO2017028332A1 publication Critical patent/WO2017028332A1/zh

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Classifications

    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611Control of matrices with row and column drivers
    • G09G3/3685Details of drivers for data electrodes
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611Control of matrices with row and column drivers
    • G09G3/3674Details of drivers for scan electrodes
    • G09G3/3677Details of drivers for scan electrodes suitable for active matrices only
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611Control of matrices with row and column drivers
    • G09G3/3648Control of matrices with row and column drivers using an active matrix
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611Control of matrices with row and column drivers
    • G09G3/3674Details of drivers for scan electrodes
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611Control of matrices with row and column drivers
    • G09G3/3696Generation of voltages supplied to electrode drivers
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00Aspects of the constitution of display devices
    • G09G2300/04Structural and physical details of display devices
    • G09G2300/0404Matrix technologies
    • G09G2300/0408Integration of the drivers onto the display substrate
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00Command of the display device
    • G09G2310/02Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264Details of driving circuits
    • G09G2310/027Details of drivers for data electrodes, the drivers handling digital grey scale data, e.g. use of D/A converters
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00Command of the display device
    • G09G2310/02Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264Details of driving circuits
    • G09G2310/0272Details of drivers for data electrodes, the drivers communicating data to the pixels by means of a current

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a scan driving circuit and a liquid crystal display device having the same.
  • a scan driving circuit is used, that is, a conventional thin film transistor liquid crystal display array process is used to fabricate a scan driving circuit on an array substrate to realize a driving method for progressive scanning.
  • the driving circuit of each stage of the existing scan driving circuit has the same pull-down maintaining module to maintain the good closed state during the scanning signal output to maintain the stability of the scanning driving circuit, but the driving circuit of each stage is set the same.
  • the pull-down sustaining module will make the circuit design complicated, consume a large amount of power, and widen the frame of the liquid crystal display device.
  • the technical problem to be solved by the present invention is to provide a scan driving circuit and a liquid crystal display device having the same, which can simplify the circuit design, reduce power consumption, and narrow the frame of the liquid crystal display device while ensuring the stability of the scan driving circuit.
  • a technical solution adopted by the present invention is to provide a scan driving circuit, including a plurality of first driving circuits (10) and a plurality of second driving circuits (20), each of the first driving circuits ( 10) connected to each of the second driving circuits (20) and the first driving circuit (10) and the second driving circuit (20) are alternately arranged in turn, each of the first driving circuits (10)
  • each of the second driving circuits (20) includes a pull-up module (200), a pull-up control module (100) for driving the pull-up module (200), a reference voltage terminal (VSS), and a first pull-down a maintaining unit (610), each of the first driving circuits (10) further includes a first pull-down maintaining control unit (620);
  • the first pull-down maintaining unit (610) includes a first controllable switch (T32) and a second controllable switch (T42), the second controllable switch (T42) and the first controllable switch (T32) The control terminal is connected, the input end of the second
  • the first pull-down maintaining control unit (620) of the first driving circuit (10) controls the first and second pull-down maintaining signals (LC1) and (LC2) according to the scan line during the non-working time
  • the first controllable switch (T32) communicates the scan line with a reference voltage terminal (VSS), and the second controllable switch (T42) connects the pull-up control module (100) with a reference voltage terminal (VSS) Connected
  • the first controllable switch (T32) and the second controllable switch (T42) are disconnected when the scan line is in working time, and the first controllable switch (T32) turns the scan line and the reference voltage
  • the communication of the terminal (VSS) is broken, and the second controllable switch (T42) disconnects the communication of the pull-up control module (100) from the reference voltage terminal (VSS).
  • Each of the first driving circuit (10) and each of the second driving circuits (20) further includes a second pull-down maintaining unit (710), and each of the first driving circuits (10) further includes a a second pull-down maintenance control unit (720), the second pull-down maintaining unit (710) includes a sixth controllable switch (T33) and a seventh controllable switch (T43), the sixth controllable switch (T33)
  • the control end of the seventh controllable switch (T43) is connected, the input end of the seventh controllable switch (T43) is connected to the output end of the pull-up control module (100), and the sixth controllable switch (T33)
  • an output end of the seventh controllable switch (T43) is connected to the reference voltage terminal (VSS), an input end of the sixth controllable switch (T33) is connected to the scan line;
  • the maintenance control unit (720) includes an eighth controllable switch (T61), a ninth controllable switch (T63), and a tenth controllable switch (T64), and
  • the second pull-down maintaining control unit (720) of the first driving circuit (10) controls the control according to the first and second pull-down sustain signals (LC1) and (LC2) when the scan line is in the non-working time
  • the sixth controllable switch (T33) communicates the scan line with a reference voltage terminal (VSS), and the seventh controllable switch (T43) connects the pull-up control module (100) with a reference voltage terminal (VSS) Connected
  • the sixth controllable switch (T33) and the seventh controllable switch (T43) are disconnected when the scan line is in the working time, and the sixth controllable switch (T33) turns the scan line and the reference voltage end ( The communication of VSS) is broken, and the seventh controllable switch (T43) disconnects the communication of the pull-up control module (100) from the reference voltage terminal (VSS).
  • Each of the first driving circuit (10) and each of the second driving circuits (20) further includes a balance bridge unit (800), and the balance bridge unit (800) includes an eleventh controllable switch ( T55), the control end of the eleventh controllable switch (T55) is connected to the output end of the pull-up control module (100), and the input end and the output end of the eleventh controllable switch (T55) are respectively connected
  • the sixth controllable switch (T33) and the control end of the first controllable switch (T32), the input end of the eleventh controllable switch (T55) of the second drive circuit (20) is further An input end of the eleventh controllable switch (T55) connected to the first driving circuit (10), and an output end of the eleventh controllable switch (T55) of the second driving circuit (20) An output of the eleventh controllable switch (T55) of the first drive circuit (10) is also coupled.
  • Each of the first driving circuit (10) and each of the second driving circuits (20) further includes a shutdown unit (900), and the shutdown unit (90) includes a twelfth controllable switch ( T52) and a thirteenth controllable switch (T62), wherein the twelfth controllable switch (T52) and the thirteenth controllable switch (T62) are connected to each other and are connected to the pull-up control module
  • An output end of (10), an input end of the twelfth controllable switch (T52) is connected to a control end of the fourth controllable switch (T53), and an output end of the twelfth controllable switch (T52)
  • Connecting the reference voltage terminal (VSS) the input end of the thirteenth controllable switch (T62) is connected to the control end of the ninth controllable switch (T63), and the thirteenth controllable switch (T62)
  • the output is connected to the reference voltage terminal (VSS).
  • the pull-up control module (100) includes a fourteen controllable switch (T11), and the control end of the fourteenth controllable switch (T11) is connected to a superior downlink signal, and the fourteenth controllable switch
  • the input end of (T11) is connected to the upper scanning signal, and the output end of the fourteenth controllable switch (T11) is the output end of the pull-up control module (100);
  • the pull-up module (200) includes the a fifteen controllable switch (T21), a control end of the fifteenth controllable switch (T21) connected to an output end of the fourteenth controllable switch (T11), the fifteenth controllable switch (T21)
  • the input terminal is connected to a clock scan signal, and the output end of the fifteenth controllable switch (T21) is connected to the scan line.
  • Each of the first driving circuit (10) and each of the second driving circuits (20) further includes a downlink module (300), and the downlink module (300) includes a sixteen controllable switch ( T22), a control end of the sixteen controllable switch (T22) is connected to an output end of the pull-up control module (100), and an input end of the sixteen controllable switch (T22) is connected to the clock scan The signal, the output of the sixteen controllable switch (T22) is connected to a superior downlink signal.
  • Each of the first driving circuit (10) and each of the second driving circuits (20) further includes a pull-down module (400), and the pull-down module (400) includes a seventeen controllable switch (T31) And an eighteen controllable switch (T41), the seventeenth controllable switch (T31) and the eighteen controllable switch (T41) control end are connected and connected to an upper scan line, the tenth An input end of the eight controllable switch (T41) is connected to an output end of the pull-up control module (100), and an output end of the seventeenth controllable switch (T31) and the eighteenth controllable switch (T41) The reference voltage terminal (VSS) is connected, and an input end of the eighteen controllable switch (T41) is connected to the scan line.
  • VSS reference voltage terminal
  • Each of the first driving circuit (10) and each of the second driving circuits (20) further includes a storage capacitor (Cb), and one end of the storage capacitor (Cb) is connected to the pull-up control module. At the output of (100), the other end of the storage capacitor (Cb) is connected to the scan line.
  • Each of the first driving circuit (10) and each of the second driving circuits (20) further includes a pull-down module (400), and the pull-down module (400) includes a seventeen controllable switch (T31) And an eighteen controllable switch (T41), wherein the control end of the seventeenth controllable switch (T31) is connected to an upper scanning line or an upper downlink signal, and the control end of the eighteen controllable switch (T41) Connecting an upper scanning line or an upper level downlink signal, an input end of the eighteen controllable switch (T41) is connected to an output end of the pull-up control module (100), and the seventeenth controllable switch (T31) And an output end of the eighteen controllable switch (T41) is connected to the reference voltage terminal (VSS), and an input end of the eighteen controllable switch (T41) is connected to the scan line.
  • VSS reference voltage terminal
  • another technical solution adopted by the present invention is to provide a liquid crystal display device comprising the scan driving circuit as described above.
  • the liquid crystal display device of the present invention includes a first driving circuit and a second driving circuit which are alternately arranged, wherein the first driving circuit includes the same as the second driving circuit.
  • the first and second pull-down sustain control units are further included in the component, so that the first and second drive circuits ensure the stability of the scan drive circuit by sharing the first and second pull-down sustain control units of the first drive circuit to simplify The circuit reduces power consumption and narrows the frame of the liquid crystal display device.
  • FIG. 1 is a schematic structural view of a scan driving circuit of a first embodiment of the present invention
  • FIG. 2 is a schematic structural view of a first driving circuit of a scan driving circuit according to a first embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of a second driving circuit of a scan driving circuit according to a first embodiment of the present invention
  • Figure 4 is a waveform diagram of a scan driving circuit of a first embodiment of the present invention.
  • Figure 5 is a block diagram showing the structure of a scan driving circuit of a second embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of a first driving circuit of a scan driving circuit according to a second embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a second driving circuit of a scan driving circuit according to a second embodiment of the present invention.
  • Figure 8 is a waveform diagram of a scan driving circuit of a second embodiment of the present invention.
  • Figure 9 is a schematic view of a liquid crystal display device of the present invention.
  • the scan driving circuit 1 of the first embodiment of the present invention includes a plurality of first driving circuits 10 and a plurality of second driving circuits 20.
  • Each of the first driving circuits 10 is connected to each of the second driving circuits 20 and the first driving circuit 10 and the second driving circuit 20 are alternately arranged in sequence.
  • Each of the first driving circuit 10 and each of the second driving circuits 20 includes a pull-up module 200, a pull-up control module 100 for driving the pull-up module 200, a reference voltage terminal VSS, and a first pull-down maintenance.
  • the unit 610, each of the first driving circuits 10 further includes a first pull-down maintenance control unit 620.
  • the first pull-down maintaining unit 610 includes a first controllable switch T32 and a second controllable switch T42, and the second controllable switch T42 is connected to the control end of the first controllable switch T32, the second An input end of the controllable switch T42 is connected to an output end of the pull-up control module 100, and an output end of the second controllable switch T42 and the first controllable switch T32 are connected to the reference voltage terminal VSS, The input end of the first controllable switch T32 is connected to a scan line such as G(N) and G(N+1).
  • the first pull-down maintenance control unit 620 includes a third controllable switch T51, a fourth controllable switch T53, and a fifth controllable switch T54.
  • the input end and the control end of the third controllable switch T51 are connected to the first lower Pulling the sustain signal LC1
  • the control end of the fourth controllable switch T53 is connected to the output end of the third controllable switch T51
  • the input end of the fourth controllable switch T53 is connected to the first pull-down maintenance signal LC1
  • the output end of the fourth controllable switch T53 is connected to the control end of the first controllable switch T32
  • the control end of the fifth controllable switch T54 is connected to the second pull-down maintenance signal LC2, the fifth controllable
  • the input end of the switch T54 is connected to the first pull-down maintaining signal LC1
  • the output end of the fifth controllable switch T54 is connected to the control end of the first controllable switch T32, the first pull-down maintaining signal LC1
  • the first pull-down maintenance control unit 620 of the first driving circuit 10 is configured according to the first and second pull-down sustain signals LC1 and LC2. Controlling the first controllable switch T32 and the second controllable switch T42 in the first pull-down maintaining unit 610 of the first and second driving circuits 10 and 20 to be turned on, the first The control switch T32 communicates the scan lines G(N) and G(N+1) with the reference voltage terminal VSS, and the second controllable switch T42 connects the pull-up control module 100 with the reference voltage terminal VSS.
  • the first controllable switch T32 and the second controllable switch T42 are disconnected, and the first controllable switch T32 will scan lines The communication with the reference voltage terminal VSS is disconnected, and the second controllable switch T42 disconnects the communication between the pull-up control module 100 and the reference voltage terminal VSS.
  • Each of the first driving circuit 10 and each of the second driving circuits 20 further includes a second pull-down maintaining unit 710, each of the first driving circuits 10 further includes a second pull-down maintaining control unit 720, the first The second pull-down maintaining unit 710 includes a sixth controllable switch T33 and a seventh controllable switch T33.
  • the sixth controllable switch T33 is connected to the control end of the seventh controllable switch T43, and the seventh controllable switch T43 The input end is connected to the output end of the pull-up control module 100, and the output ends of the sixth controllable switch T33 and the seventh controllable switch T43 are connected to the reference voltage terminal VSS, and the sixth controllable The input of the switch T33 is connected to the scan lines, such as G(N) and G(N+1).
  • the second pull-down maintenance control unit 720 includes an eighth controllable switch T61, a ninth controllable switch T63, and a tenth controllable switch T64.
  • the input end of the eighth controllable switch T61 and the control end are connected to the second Pulling down the sustain signal LC2
  • the control end of the ninth controllable switch T63 is connected to the output end of the eighth controllable switch T61
  • the input end of the ninth controllable switch T63 is connected to the second pull-down maintenance signal LC2
  • the output end of the ninth controllable switch T63 is connected to the control end of the sixth controllable switch T33
  • the control end of the tenth controllable switch T64 is connected to the first pull-down maintenance signal LC1, the tenth
  • the input end of the controllable switch T64 is connected to the second pull-down maintaining signal LC2, and the output end of the tenth controllable switch T64 is connected to the control end of the sixth controllable switch T33.
  • the second pull-down maintaining control unit 720 of the first driving circuit 10 is configured according to the first and second pull-down maintaining signals LC1 and The LC2 controls the sixth controllable switch T33 and the seventh controllable switch T43 in the second pull-down maintaining unit 710 of the first and second driving circuits 10 and 20 to be turned on, the sixth The control switch T33 connects the scan lines G(N) and G(N+1) to the reference voltage terminal VSS, and the seventh controllable switch T43 connects the pull-up control module 100 with the reference voltage terminal VSS.
  • the sixth controllable switch T33 and the seventh controllable switch T43 are disconnected, and the sixth controllable switch T33 will scan lines.
  • the communication between G(N) and G(N+1) and the reference voltage terminal VSS is disconnected, and the seventh controllable switch T43 disconnects the communication between the pull-up control module 100 and the reference voltage terminal VSS.
  • the first pull-down maintaining unit 610 and the second pull-down maintaining unit 710 are alternately turned on, when the first pull-down maintaining unit 610 is turned on.
  • the controllable switches T32 and T43 are turned on; when the second pull-down maintaining unit 710 is turned on, the controllable switch T33 and the controllable switch T43 are turned on.
  • the first pull-down maintaining unit 610 and the second pull-down maintaining unit 710 are all disconnected, and the controllable switches T32, T42, T33 and T43 is disconnected.
  • two sets of pull-down maintaining modules such as the first pull-down maintaining unit 610 and the first pull-down maintaining control unit 620 and the second pull-down maintaining unit 710 and the second pull-down maintaining control unit 720.
  • 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 a single set of pull-down maintenance modules working for too long, and the on-state and off-state potential changes of the thin film transistors therein.
  • the pull-down maintenance module needs to be turned on when the conduction is not smooth, and when it needs to be turned off, it cannot be completely turned off.
  • Each of the first driving circuit 10 and each of the second driving circuits 20 further includes a balance bridge unit 800, and the balance bridge unit 800 includes an eleventh controllable switch T55, and the eleventh controllable switch T55 The control terminal is connected to the output end of the pull-up control module 100, and the input end and the output end of the eleventh controllable switch T55 are respectively connected to the sixth controllable switch T33 and the first controllable switch T32.
  • the input end of the eleventh controllable switch T55 of the second driving circuit 20 is further connected to the input end of the eleventh controllable switch T55 of the first driving circuit 10
  • the second An output of the eleventh controllable switch T55 of the driving circuit 20 is further connected to an output end of the eleventh controllable switch T55 of the first driving circuit 10.
  • the eleventh controllable switch T55 When the scan lines G(N) and G(N+1) are in the working time, the eleventh controllable switch T55 is turned on, thereby the first pull-down maintaining unit 610 and the second pull-down maintaining unit
  • the control terminal of the 710 is connected to the end of the control terminal of the first pull-down maintaining unit 610 and the second pull-down maintaining unit 710 at a low potential, and the other end of the high potential is pulled low, so that the first The pull-down maintaining unit 610 and the second pull-down maintaining unit 710 are turned off.
  • the eleventh controllable switch T55 to balance the potential of both ends thereof, during operation, especially when the twelfth controllable switch T52 fails, P(N) and P(N+1)
  • the potential of the point can be pulled down to the potentials of the K(N) and K(N+1) points by the eleventh controllable switch T55, and the first, second, sixth and seventh can be
  • the control switches T32, T42, T33, and T43 are turned off to prevent the signals of the scan lines G(N) and G(N+1) and the output of the pull-up control module 100 from being affected by the incomplete turn-off of the thin film transistors, thereby It affects the output of the scan driving circuit 1.
  • Each of the first driving circuit 10 and each of the second driving circuits 20 further includes an off unit 900, and the off unit 90 includes a twelfth controllable switch T52 and a thirteenth controllable switch T62.
  • the control terminals of the twelfth controllable switch T52 and the thirteenth controllable switch T62 are connected and are both connected to the output end of the pull-up control module 100, and the input end of the twelfth controllable switch T52 is connected.
  • the control end of the fourth controllable switch T53, the output end of the twelfth controllable switch T52 is connected to the reference voltage terminal VSS, and the input end of the thirteenth controllable switch T62 is connected to the ninth
  • the control terminal of the control switch T63, the output end of the thirteenth controllable switch T62 is connected to the reference voltage terminal VSS.
  • the twelfth and thirteenth controllable switches T52 and T62 assist in lowering the control terminals S(N) and S(N+1) of the fourth controllable switch T53 and the ninth Controlling the potentials at the control terminals T(N) and T(N+1) of the switch T63, which helps to pull down the control terminals P(N) and P of the first and second controllable switches T32 and T42 ( N+1) and the potentials at the control terminals K(N) and K(N+1) of the sixth and seventh controllable switches T33 and T43, thereby turning off the pull-down maintenance module to prevent the pull-down function of the pull-down maintaining module It affects the output of the scan driving circuit 1.
  • the first, second, sixth, and seventh controllable switches T32, T42, T33, and T43 The potential difference Vgs ⁇ 0 between the control terminal and the output terminal is in a more negative off state, which can better ensure the stability of the circuit.
  • the first pull-down sustain signal LC1 and the second pull-down sustain signal LC2 are not only low-level potentials smaller than the reference voltage terminal VSS, but also low-frequency signals, the first pull-down sustain signals LC1 and the second The signal switching time of the pull-down sustain signal LC2 selects the blank time between frames of each frame.
  • the pull-up control module 100 of each of the first driving circuit 10 and each of the second driving circuits 20 includes a fourteen controllable switch T11, and the control end of the fourteenth controllable switch T11 is connected to the upper level. Down signals ST(N-2) and ST(N-1), the input ends of the fourteenth controllable switch T11 are connected to the upper scanning signals G(N-2) and G(N-1), The output end of the fourteen controllable switch T11 is the output end of the pull-up control module 100.
  • Each of the first driving circuit 10 and the pull-up module 200 of each of the second driving circuits 20 includes a fifteenth controllable switch T21, and a control end of the fifteenth controllable switch T21 is connected to the An output end of the fourteenth controllable switch T11, the input end of the fifteenth controllable switch T21 is connected to the clock scanning signals CK1 and CK2, and the output end of the fifteenth controllable switch T21 is connected to the scan line G ( N) and G(N+1).
  • Each of the first driving circuit 10 and each of the second driving circuits 20 further includes a downlink module 300, and the downlink module 300 includes a sixteen controllable switch T22, and the sixteenth controllable switch T22
  • the control terminal is connected to the output end of the pull-up control module 100, and the input end of the sixteenth controllable switch T22 is connected to the clock scan signals CK1 and CK2, and the output end of the sixteenth controllable switch T22 is connected.
  • the superior transmits signals ST(N) and ST(N+1).
  • the function of the sixteen controllable switch T22 is to transmit a signal to the control end of the fifteenth controllable switch T21 to serve as a buffering function to reduce the influence of signal delay on the level transmission.
  • Each of the first driving circuit 10 and each of the second driving circuits 20 further includes a pull-down module 400, and the pull-down module 400 includes a seventeenth controllable switch T31 and an eighteen controllable switch T41.
  • the controllable end of the seventeen controllable switch T31 and the eighteenth controllable switch T41 are connected and connected to the upper scanning lines G(N+2) and G(N+3), and the eighteen controllable switch T41
  • the input end is connected to the output end of the pull-up control module 100, and the output ends of the seventeenth controllable switch T31 and the eighteenth controllable switch T41 are connected to the reference voltage terminal VSS, the seventeenth The input terminals of the controllable switch T31 are connected to the scanning lines G(N) and G(N+1).
  • the function of the seventeenth controllable switch T31 is to pull down the potentials at the scan lines G(N) and G(N+1) to the reference voltage terminal VSS to ensure the scan lines G(N) and G.
  • the potential of (N+1) is maintained at a low potential.
  • the function of the eighteenth controllable switch T41 is to pull down the potentials at the nodes Q(N) and Q(N+1) to the reference voltage terminal VSS, and ensure the fifteenth and sixteenth controllable switches T21 And T22 is normally closed.
  • Each of the first driving circuit 10 and each of the second driving circuits 20 further includes a storage capacitor Cb, and one end of the storage capacitor Cb is connected to an output end of the pull-up control module 100, and the storage capacitor The other end of Cb is connected to the scanning lines G(N) and G(N+1).
  • the function of the storage capacitor Cb is to raise the potential at the nodes Q(N) and Q(N+1) by the principle of conservation of charge, and to ensure that the fifteenth controllable switch T21 has sufficient driving capability.
  • FIG. 4 it is a signal waveform diagram of the scan driving circuit 1 of the first embodiment of the present invention.
  • the first pull-down sustain signal LC1 and the second pull-down sustain signal LC2 are low frequency signals, and the low frequency signal can avoid the signal caused by the potential change on the scan driving circuit when the high frequency signal is switched between high and low levels. Fluctuation, and the second pull-down maintenance module architecture, so that there is no necessary restriction on the pulse periods of the first and second pull-down sustain signals LC1 and LC2, and only the potentials of the first and second pull-down sustain signals LC1 and LC2 are complementary.
  • the pull-down sustain signal LC in FIG. 4 is responsible for controlling the high and low potentials of the pull-down sustain circuit portion, such as P(N) and K(N), during operation, its potential is pulled to the first and second pull-down sustain signals LC1 and LC2.
  • Low potential that is, the potentials of the plurality of control terminals of the thin film transistor for pull-down maintenance, such as the first and second controllable switches T32 and T42, are at a more negative off state than the reference voltage terminal VSS during operation, ensuring the scan driving circuit Running.
  • the reference voltage terminal VSS is responsible for providing a low potential of the output signal of the scan signal output terminal and pulling down the potentials at the nodes Q(N), S(N), T(N) to effectively solve the thin film transistor of the pixel display region.
  • the image of the clock through effect.
  • the STV is a scan drive circuit enable signal
  • the scan enable signal STV is responsible for turning on the first or first and second drive circuits, and is generally designed to pull down the Q point of the last stage or the last two stages.
  • Other control outputs, input and upload, and downlink signals are generated by the operation of the scan drive circuit itself.
  • FIG. 7 is a schematic structural diagram of a scan driving circuit 2 according to a second embodiment of the present invention.
  • the scan driving circuit 2 of the second embodiment is different from the scan driving circuit 1 of the first embodiment described above in that each of the first driving circuit 10 and each of the second driving circuits 20 further includes a pull-down
  • the module 400, the pull-down module 400 includes a seventeenth controllable switch T31 and an eighteen controllable switch T41, and the control end of the seventeenth controllable switch T31 is connected to the upper scanning line G (N+2) or the upper level Signaling, the control end of the eighteen controllable switch T41 is connected to the upper scanning line G (N+3) or the upper downlink signal, and the input end of the eighteen controllable switch T41 is connected to the pull-up control module
  • the output end of the seventeenth controllable switch T31 and the eighteenth controllable switch T41 are connected to the reference voltage terminal VSS, and the input end of the seventeenth controllable switch
  • FIG. 8 is a signal waveform diagram of the scan driving circuit 2 of the second embodiment of the present invention.
  • the control end of the eighteen controllable switch T41 in the pull-down module 400 of the first driving circuit 10 is connected to a lower-level scan line, such as G(N+3), and The control end of the seventeenth controllable switch T31 is connected to the lower scan line, such as G(N+2); the control end of the eighteen controllable switch T41 in the pull-down module 400 of the second drive circuit 20 Connect to the lower level scan line, such as G(N+4), and connect the control end of the seventeenth controllable switch T31 to the lower level scan line, such as G(N+3).
  • the signals at the nodes Q(N) and Q(N+1) can be made convex, thereby enhancing the pull-down capability for the scan lines G(N) and G(N+1).
  • only the one-side pull-down maintenance module may be set, such as only setting the first pull-down maintaining unit 610 and the first pull-down maintaining control unit 620, or setting only the second pull-down maintaining unit 710 and the second pull-down maintaining.
  • the control unit 720 unilaterally arranged, also achieves the object of the invention.
  • FIG. 9 is a schematic diagram of a liquid crystal display device of the present invention.
  • the liquid crystal display device includes a scan driving circuit 1 or a scan driving circuit 2, and the scan driving circuit 1 or 2 is disposed at both ends of the liquid crystal display device, and the scan driving circuit 1 or 2 is any scanning of the present invention. Drive circuit.

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Abstract

一种扫描驱动电路及液晶显示装置,扫描驱动电路包括若干第一驱动电路(10)及若干第二驱动电路(20),每一第一驱动电路(10)与每一第二驱动电路(20)连接且第一驱动电路(10)及第二驱动电路(20)依次交替排列,每一第一驱动电路(10)及第二驱动电路(20)均包括上拉模块(200)、驱动上拉模块(200)的上拉控制模块(100)、基准电压端(VSS)及第一下拉维持单元(620),每一第一驱动电路(10)还包括第一下拉维持控制单元(620),第一驱动电路(10)及第二驱动电路(20)通过共享第一驱动电路(10)的第一下拉维持控制单元(620)来保证扫描驱动电路的稳定性,以实现简化电路、降低功耗及使得液晶显示装置边框变窄。

Description

扫描驱动电路及具有该电路的液晶显示装置
【技术领域】
本发明涉及显示技术领域,特别是涉及一种扫描驱动电路及具有该电路的液晶显示装置。
【背景技术】
目前的液晶显示装置中采用扫描驱动电路,也就是利用现有薄膜晶体管液晶显示器阵列制程将扫描驱动电路制作在阵列基板上,实现对逐行扫描的驱动方式。现有的扫描驱动电路的每级驱动电路都具有相同的下拉维持模块以在扫描信号输出作用期间下拉维持保持好的关闭状态,来维持扫描驱动电路的稳定性,然而每级驱动电路都设置相同的下拉维持模块将使得电路设计复杂、功耗大,而且使得液晶显示装置边框变宽。
【发明内容】
本发明主要解决的技术问题是提供一种扫描驱动电路及具有该电路的液晶显示装置,能够在保证扫描驱动电路稳定性的情况下使得电路设计简单、功耗小且液晶显示装置边框窄。
为解决上述技术问题,本发明采用的一个技术方案是:提供一种扫描驱动电路,包括若干第一驱动电路(10)及若干第二驱动电路(20),每一所述第一驱动电路(10)与每一所述第二驱动电路(20)连接且所述第一驱动电路(10)及所述第二驱动电路(20)依次交替排列,每一所述第一驱动电路(10)及每一所述第二驱动电路(20)均包括上拉模块(200)、驱动所述上拉模块(200)的上拉控制模块(100)、基准电压端(VSS)及第一下拉维持单元(610),每一所述第一驱动电路(10)还包括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)及第二可控开关(T42),所述第二可控开关(T42)与所述第一可控开关(T32)的控制端相连,所述第二可控开关(T42)的输入端连接所述上拉控制模块(100)的输出端,所述第二可控开关(T42)及所述第一可控开关(T32)的输出端均连接所述基准电压端(VSS),所述第一可控开关(T32)的输入端连接一扫描线;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)及第五可控开关(T54),所述第三可控开关(T51)的输入端和控制端连接一第一下拉维持信号(LC1),所述第四可控开关(T53)的控制端连接所述第三可控开关(T51)的输出端,所述第四可控开关(T53)的输入端连接所述第一下拉维持信号(LC1),所述第四可控开关(T53)的输出端连接所述第一可控开关(T32)的控制端,所述第五可控开关(T54)的控制端连接一第二下拉维持信号(LC2),所述第五可控开关(T54)的输入端连接所述第一下拉维持信号(LC1),所述第五可控开关(T54)的输出端连接所述第一可控开关(T32)的控制端,所述第一下拉维持信号(LC1)与所述第二下拉维持信号(LC2)逻辑相反;
当扫描线处于非工作时间内,所述第一驱动电路(10)的第一下拉维持控制单元(620)根据所述第一及第二下拉维持信号(LC1)及(LC2)控制所述第一及第二驱动电路(10)及(20)的所述第一下拉维持单元(610)中的所述第一可控开关(T32)和所述第二可控开关(T42)导通,所述第一可控开关(T32)将扫描线与基准电压端(VSS)连通,所述第二可控开关(T42)将所述上拉控制模块(100)与基准电压端(VSS)连通;
当扫描线处于工作时间内,所述第一可控开关(T32)和所述第二可控开关(T42)断开,所述第一可控开关(T32)将扫描线与所述基准电压端(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)与所述基准电压端(VSS)的连通断开。
其中,每一所述第一驱动电路(10)及每一所述第二驱动电路(20)还包括第二下拉维持单元(710),每一所述第一驱动电路(10)还包括第二下拉维持控制单元(720),所述第二下拉维持单元(710)包括第六可控开关(T33)及第七可控开关(T43),所述第六可控开关(T33)与所述第七可控开关(T43)的控制端相连,所述第七可控开关(T43)的输入端连接所述上拉控制模块(100)的输出端,所述第六可控开关(T33)及所述第七可控开关(T43)的输出端均连接所述基准电压端(VSS),所述第六可控开关(T33)的输入端连接所述扫描线;所述第二下拉维持控制单元(720)包括第八可控开关(T61)、第九可控开关(T63)及第十可控开关(T64),所述第八可控开关(T61)的输入端和控制端连接所述第二下拉维持信号(LC2),所述第九可控开关(T63)的控制端连接所述第八可控开关(T61)的输出端,所述第九可控开关(T63)的输入端连接所述第二下拉维持信号(LC2),所述第九可控开关(T63)的输出端连接所述第六可控开关(T33)的控制端,所述第十可控开关(T64)的控制端连接所述第一下拉维持信号(LC1),所述第十可控开关(T64)的输入端连接所述第二下拉维持信号(LC2),所述第十可控开关(T64)的输出端连接所述第六可控开关(T33)的控制端;
当扫描线处于非工作时间内,所述第一驱动电路(10)的所述第二下拉维持控制单元(720)根据所述第一及第二下拉维持信号(LC1)及(LC2)控制所述第一及第二驱动电路(10)及(20)的所述第二下拉维持单元(710)中的所述第六可控开关(T33)和所述第七可控开关(T43)导通,所述第六可控开关(T33)将扫描线与基准电压端(VSS)连通,所述第七可控开关(T43)将所述上拉控制模块(100)与基准电压端(VSS)连通;
当扫描线处于工作时间内,所述第六可控开关(T33)和所述第七可控开关(T43)断开,所述第六可控开关(T33)将扫描线与基准电压端(VSS)的连通断开,所述第七可控开关(T43)将所述上拉控制模块(100)与基准电压端(VSS)的连通断开。
其中,每一所述第一驱动电路(10)及每一所述第二驱动电路(20)还包括平衡桥单元(800),所述平衡桥单元(800)包括第十一可控开关(T55),所述第十一可控开关(T55)的控制端连接所述上拉控制模块(100)的输出端,所述第十一可控开关(T55)的输入端及输出端分别连接所述第六可控开关(T33)及所述第一可控开关(T32)的控制端,所述第二驱动电路(20)的所述第十一可控开关(T55)的输入端还连接所述第一驱动电路(10)的所述第十一可控开关(T55)的输入端,所述第二驱动电路(20)的所述第十一可控开关(T55)的输出端还连接所述第一驱动电路(10)的所述第十一可控开关(T55)的输出端。
其中,每一所述第一驱动电路(10)及每一所述第二驱动电路(20)还包括关断单元(900),所述关断单元(90)包括第十二可控开关(T52)及第十三可控开关(T62),所述第十二可控开关(T52)及所述第十三可控开关(T62)的控制端相连且均连接至所述上拉控制模块(100)的输出端,所述第十二可控开关(T52)的输入端连接所述第四可控开关(T53)的控制端,所述第十二可控开关(T52)的输出端连接所述基准电压端(VSS),所述第十三可控开关(T62)的输入端连接所述第九可控开关(T63)的控制端,所述第十三可控开关(T62)的输出端连接所述基准电压端(VSS)。
其中,所述上拉控制模块(100)包括第十四可控开关(T11),所述第十四可控开关(T11)的控制端连接上级下传信号,所述第十四可控开关(T11)的输入端连接上级扫描信号,所述第十四可控开关(T11)的输出端即为所述上拉控制模块(100)的输出端;所述上拉模块(200)包括第十五可控开关(T21),所述第十五可控开关(T21)的控制端连接所述第十四可控开关(T11)的输出端,所述第十五可控开关(T21)的输入端连接一时钟扫描信号,所述第十五可控开关(T21)的输出端连接所述扫描线。
其中,每一所述第一驱动电路(10)及每一所述第二驱动电路(20)还包括下传模块(300),所述下传模块(300)包括第十六可控开关(T22),所述第十六可控开关(T22)的控制端连接所述上拉控制模块(100)的输出端,所述第十六可控开关(T22)的输入端连接所述时钟扫描信号,所述第十六可控开关(T22)的输出端连接一上级下传信号。
其中,每一所述第一驱动电路(10)及每一所述第二驱动电路(20)还包括下拉模块(400),所述下拉模块(400)包括第十七可控开关(T31)及第十八可控开关(T41),所述第十七可控开关(T31)及所述第十八可控开关(T41)的控制端相连且连接至一上级扫描线,所述第十八可控开关(T41)的输入端连接所述上拉控制模块(100)的输出端,所述第十七可控开关(T31)及所述第十八可控开关(T41)的输出端均连接所述基准电压端(VSS),所述第十八可控开关(T41)的输入端连接所述扫描线。
其中,每一所述第一驱动电路(10)及每一所述第二驱动电路(20)还包括储能电容(Cb),所述存储电容(Cb)的一端连接所述上拉控制模块(100)的输出端,所述储能电容(Cb)的另一端连接所述扫描线。
其中,每一所述第一驱动电路(10)及每一所述第二驱动电路(20)还包括下拉模块(400),所述下拉模块(400)包括第十七可控开关(T31)及第十八可控开关(T41),所述第十七可控开关(T31)的控制端连接一上级扫描线或上级下传信号,所述第十八可控开关(T41)的控制端连接一上级扫描线或上级下传信号,所述第十八可控开关(T41)的输入端连接所述上拉控制模块(100)的输出端,所述第十七可控开关(T31)及所述第十八可控开关(T41)的输出端均连接所述基准电压端(VSS),所述第十八可控开关(T41)的输入端连接所述扫描线。
为解决上述技术问题,本发明采用的另一个技术方案是:提供一种液晶显示装置,包括如上所述任一所述的扫描驱动电路。
本发明的有益效果是:区别于现有技术的情况,本发明的液晶显示装置包括交替排列的第一驱动电路及第二驱动电路,其中第一驱动电路除了包括有与第二驱动电路相同的元件外还包括第一及第二下拉维持控制单元,因此第一及第二驱电路通过共享第一驱动电路的第一及第二下拉维持控制单元来保证扫描驱动电路的稳定性,以实现简化电路、降低功耗及使得液晶显示装置边框变窄。
【附图说明】
图1是本发明的第一实施例的扫描驱动电路的结构示意图;
图2是本发明的第一实施例的扫描驱动电路的第一驱动电路的结构示意图;
图3是本发明的第一实施例的扫描驱动电路的第二驱动电路的结构示意图;
图4是本发明的第一实施例的扫描驱动电路的波形图;
图5是本发明的第二实施例的扫描驱动电路的结构示意图;
图6是本发明的第二实施例的扫描驱动电路的第一驱动电路的结构示意图;
图7是本发明的第二实施例的扫描驱动电路的第二驱动电路的结构示意图;
图8是本发明的第二实施例的扫描驱动电路的波形图;
图9是本发明的液晶显示装置的示意图。
【具体实施方式】
请一并参阅图1至图3,是本发明的第一实施例的扫描驱动电路的结构示意图。本发明的第一实施例的扫描驱动电路1包括若干第一驱动电路10及若干第二驱动电路20。每一所述第一驱动电路10与每一所述第二驱动电路20连接且所述第一驱动电路10及所述第二驱动电路20依次交替排列。
每一所述第一驱动电路10及每一所述第二驱动电路20均包括上拉模块200、驱动所述上拉模块200的上拉控制模块100、基准电压端VSS及第一下拉维持单元610,每一所述第一驱动电路10还包括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及第二可控开关T42,所述第二可控开关T42与所述第一可控开关T32的控制端相连,所述第二可控开关T42的输入端连接所述上拉控制模块100的输出端,所述第二可控开关T42及所述第一可控开关T32的输出端均连接所述基准电压端VSS,所述第一可控开关T32的输入端连接一扫描线,如G(N)及G(N+1)。
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及第五可控开关T54,所述第三可控开关T51的输入端和控制端连接第一下拉维持信号LC1,所述第四可控开关T53的控制端连接所述第三可控开关T51的输出端,所述第四可控开关T53的输入端连接所述第一下拉维持信号LC1,所述第四可控开关T53的输出端连接所述第一可控开关T32的控制端,所述第五可控开关T54的控制端连接第二下拉维持信号LC2,所述第五可控开关T54的输入端连接所述第一下拉维持信号LC1,所述第五可控开关T54的输出端连接所述第一可控开关T32的控制端,所述第一下拉维持信号LC1与所述第二下拉维持信号LC2逻辑相反。
当扫描线G(N)及G(N+1)处于非工作时间内,所述第一驱动电路10的第一下拉维持控制单元620根据所述第一及第二下拉维持信号LC1及LC2控制所述第一及第二驱动电路10及20的所述第一下拉维持单元610中的所述第一可控开关T32和所述第二可控开关T42导通,所述第一可控开关T32将扫描线G(N)及G(N+1)与基准电压端VSS连通,所述第二可控开关T42将所述上拉控制模块100与基准电压端VSS连通。
当扫描线G(N)及G(N+1)处于工作时间内,所述第一可控开关T32和所述第二可控开关T42断开,所述第一可控开关T32将扫描线与所述基准电压端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与所述基准电压端VSS的连通断开。
每一所述第一驱动电路10及每一所述第二驱动电路20还包括第二下拉维持单元710,每一所述第一驱动电路10还包括第二下拉维持控制单元720,所述第二下拉维持单元710包括第六可控开关T33及第七可控开关T43,所述第六可控开关T33与所述第七可控开关T43的控制端相连,所述第七可控开关T43的输入端连接所述上拉控制模块100的输出端,所述第六可控开关T33及所述第七可控开关T43的输出端均连接所述基准电压端VSS,所述第六可控开关T33的输入端连接所述扫描线,如G(N)及G(N+1)。
所述第二下拉维持控制单元720包括第八可控开关T61、第九可控开关T63及第十可控开关T64,所述第八可控开关T61的输入端和控制端连接所述第二下拉维持信号LC2,所述第九可控开关T63的控制端连接所述第八可控开关T61的输出端,所述第九可控开关T63的输入端连接所述第二下拉维持信号LC2,所述第九可控开关T63的输出端连接所述第六可控开关T33的控制端,所述第十可控开关T64的控制端连接所述第一下拉维持信号LC1,所述第十可控开关T64的输入端连接所述第二下拉维持信号LC2,所述第十可控开关T64的输出端连接所述第六可控开关T33的控制端。
当扫描线G(N)及G(N+1)处于非工作时间内,所述第一驱动电路10的所述第二下拉维持控制单元720根据所述第一及第二下拉维持信号LC1及LC2控制所述第一及第二驱动电路10及20的所述第二下拉维持单元710中的所述第六可控开关T33和所述第七可控开关T43导通,所述第六可控开关T33将扫描线G(N)及G(N+1)与基准电压端VSS连通,所述第七可控开关T43将所述上拉控制模块100与基准电压端VSS连通。
当扫描线G(N)及G(N+1)处于工作时间内,所述第六可控开关T33和所述第七可控开关T43断开,所述第六可控开关T33将扫描线G(N)及G(N+1)与基准电压端VSS的连通断开,所述第七可控开关T43将所述上拉控制模块100与基准电压端VSS的连通断开。
当扫描线G(N)及G(N+1)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,当所述第一下拉维持单元610导通时,可控开关T32及T43导通;当第二下拉维持单元710导通时,可控开关T33和可控开关T43导通。当扫描线G(N)及G(N+1)处于工作时间内,所述第一下拉维持单元610及所述第二下拉维持单元710均断开,可控开关T32、T42、T33及T43断开。
所述第一实施例中通过设置两组下拉维持模块,如所述第一下拉维持单元610及第一下拉维持控制单元620与第二下拉维持单元710及第二下拉维持控制单元720,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,避免单一一组下拉维持模块工作过久,其中的薄膜晶体管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。
每一所述第一驱动电路10及每一所述第二驱动电路20还包括平衡桥单元800,所述平衡桥单元800包括第十一可控开关T55,所述第十一可控开关T55的控制端连接所述上拉控制模块100的输出端,所述第十一可控开关T55的输入端及输出端分别连接所述第六可控开关T33及所述第一可控开关T32的控制端,所述第二驱动电路20的所述第十一可控开关T55的输入端还连接所述第一驱动电路10的所述第十一可控开关T55的输入端,所述第二驱动电路20的所述第十一可控开关T55的输出端还连接所述第一驱动电路10的所述第十一可控开关T55的输出端。
当扫描线G(N)及G(N+1)处于工作时间内,所述第十一可控开关T55导通,从而将所述第一下拉维持单元610和所述第二下拉维持单元710的控制端连通,所述第一下拉维持单元610和所述第二下拉维持单元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,从而将所述第一下拉维持单元610和所述第二下拉维持单元710关断。设置所述第十一可控开关T55起到平衡其两端电位的作用,在工作期间,尤其是在所述第十二可控开关T52失效时,P(N)及P(N+1)点的电位可以通过所述第十一可控开关T55将其电位拉低至K(N)及K(N+1)点的电位,将所述第一、第二、第六及第七可控开关T32、T42、T33及T43关断,以免由于薄膜晶体管不完全关断对扫描线G(N)及G(N+1)和上拉控制模块100的输出端处的信号造成影响,从而对扫描驱动电路1的输出造成影响。
每一所述第一驱动电路10及每一所述第二驱动电路20还包括关断单元900,所述关断单元90包括第十二可控开关T52及第十三可控开关T62,所述第十二可控开关T52及所述第十三可控开关T62的控制端相连且均连接至所述上拉控制模块100的输出端,所述第十二可控开关T52的输入端连接所述第四可控开关T53的控制端,所述第十二可控开关T52的输出端连接所述基准电压端VSS,所述第十三可控开关T62的输入端连接所述第九可控开关T63的控制端,所述第十三可控开关T62的输出端连接所述基准电压端VSS。
在工作期间,所述第十二及第十三可控开关T52及T62辅助拉低所述第四可控开关T53的控制端S(N)及S(N+1)和所述第九可控开关T63的控制端T(N)及T(N+1)处的电位,这有助于拉低所述第一及第二可控开关T32及T42的控制端P(N)及P(N+1)及所述第六及第七可控开关T33及T43的控制端K(N)及K(N+1)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扫描驱动电路1的输出造成影响。而且由于第一下拉维持信号LC1的低电平低于所述基准电压端VSS的信号,因而,所述第一、第二、第六及第七可控开关T32、T42、T33及T43的控制端和输出端的电位差Vgs<0,即处于更负的关态,能更好的保证电路的稳定性。
所述的第一下拉维持信号LC1和第二下拉维持信号LC2不仅是低电平电位小于所述基准电压端VSS,而且还是低频信号,所述第一下拉维持信号LC1及所述第二下拉维持信号LC2的信号切换时间选择在每帧画面之间的空白时间。
每一所述第一驱动电路10及每一所述第二驱动电路20的所述上拉控制模块100包括第十四可控开关T11,所述第十四可控开关T11的控制端连接上级下传信号ST(N-2)及ST(N-1),所述第十四可控开关T11的输入端连接上级扫描信号G(N-2)及G(N-1),所述第十四可控开关T11的输出端即为所述上拉控制模块100的输出端。
每一所述第一驱动电路10及每一所述第二驱动电路20的所述上拉模块200包括第十五可控开关T21,所述第十五可控开关T21的控制端连接所述第十四可控开关T11的输出端,所述第十五可控开关T21的输入端连接时钟扫描信号CK1及CK2,所述第十五可控开关T21的输出端连接所述扫描线G(N)及G(N+1)。
每一所述第一驱动电路10及每一所述第二驱动电路20还包括下传模块300,所述下传模块300包括第十六可控开关T22,所述第十六可控开关T22的控制端连接所述上拉控制模块100的输出端,所述第十六可控开关T22的输入端连接所述时钟扫描信号CK1及CK2,所述第十六可控开关T22的输出端连接上级下传信号ST(N)及ST(N+1)。所述第十六可控开关T22的作用是传递信号给所述第十五可控开关T21的控制端,以起到缓冲作用,降低信号延迟对级传的影响。
每一所述第一驱动电路10及每一所述第二驱动电路20还包括下拉模块400,所述下拉模块400包括第十七可控开关T31及第十八可控开关T41,所述第十七可控开关T31及所述第十八可控开关T41的控制端相连且连接至上级扫描线G(N+2)及G(N+3),所述第十八可控开关T41的输入端连接所述上拉控制模块100的输出端,所述第十七可控开关T31及所述第十八可控开关T41的输出端均连接所述基准电压端VSS,所述第十七可控开关T31的输入端连接所述扫描线G(N)及G(N+1)。所述第十七可控开关T31的作用是下拉所述扫描线G(N)及G(N+1)处的电位至所述基准电压端VSS,确保所述扫描线G(N)及G(N+1)的电位维持在低电位。所述第十八可控开关T41的作用是下拉节点Q(N)及Q(N+1)处的电位至所述基准电压端VSS,确保所述第十五及第十六可控开关T21和T22正常关闭。
每一所述第一驱动电路10及每一所述第二驱动电路20还包括储能电容Cb,所述存储电容Cb的一端连接所述上拉控制模块100的输出端,所述储能电容Cb的另一端连接所述扫描线G(N)及G(N+1)。所述储能电容Cb的作用是利用电荷守恒的原理抬升节点Q(N)及Q(N+1)处的电位,保证所述第十五可控开关T21有足够的驱动能力。
请一并参阅图4,是本发明第一实施例的所述扫描驱动电路1的信号波形图。在本实施例中,第一下拉维持信号LC1及第二下拉维持信号LC2为低频信号,低频信号一则可以避免高频信号在高低电平切换时,电位变化对扫描驱动电路造成的信号的波动,二则配合下拉维持模块架构,可以使得对于第一及第二下拉维持信号LC1及LC2的脉冲周期不存在必要限制,只要求第一及第二下拉维持信号LC1及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扫描驱动电路失常甚至失效的危险,不容易出现问题,增强了扫描驱动电路的稳定性。
图4中下拉维持信号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,其电位被拉到第一及第二下拉维持信号LC1及LC2的低电位,即第一及第二可控开关T32和T42等多个用于下拉维持的薄膜晶体管的控制端的电位在工作期间处于比所述基准电压端VSS更负的关态,保证扫描驱动电路的运行。所述基准电压端VSS则负责提供扫描信号输出端输出信号的低电位和拉低节点Q(N)、S(N)、T(N)处的电位,以有效的解决像素显示区域的薄膜晶体管的时钟贯通效应的影像。
其中STV为扫描驱动电路启动信号,扫描启动信号STV负责开启第一或者第一、第二驱动电路,而且一般还会设计用来拉低最后一级或最后两级的Q点。其他控制输出、输入和上传、下传信号均通过扫描驱动电路本身的运作来产生。
请参见图5至图7,是本发明的第二实施例的扫描驱动电路2的结构示意图。所述第二实施例的扫描驱动电路2与上述第一实施例的扫描驱动电路1的不同之处在于:每一所述第一驱动电路10及每一所述第二驱动电路20还包括下拉模块400,所述下拉模块400包括第十七可控开关T31及第十八可控开关T41,所述第十七可控开关T31的控制端连接上级扫描线G(N+2)或上级下传信号,所述第十八可控开关T41的控制端连接上级扫描线G(N+3)或上级下传信号,所述第十八可控开关T41的输入端连接所述上拉控制模块100的输出端,所述第十七可控开关T31及所述第十八可控开关T41的输出端均连接所述基准电压端VSS,所述第十七可控开关T31的输入端连接所述扫描线G(N)及G(N+1)。
请参阅图8,是本发明第二实施例的扫描驱动电路2的信号波形图。在本发明第二实施例中将所述第一驱动电路10的下拉模块400中的第十八可控开关T41的控制端连接至一下级扫描线,如G(N+3),同时将所述第十七可控开关T31的控制端连接至一下级扫描线,如G(N+2);将所述第二驱动电路20的下拉模块400中的第十八可控开关T41的控制端连接至一下级扫描线,如G(N+4),同时将所述第十七可控开关T31的控制端连接至一下级扫描线,如G(N+3)。如此,可以使得节点Q(N)及Q(N+1)处的信号呈现凸字型,从而增强对扫描线G(N)及G(N+1)的下拉能力。
当然,本实施例也可以只设置单边的下拉维持模块,如仅设置第一下拉维持单元610及第一下拉维持控制单元620,或者仅设置第二下拉维持单元710及第二下拉维持控制单元720,单边的设置也能达到本发明的发明目的。
请参阅图9,为本发明一种液晶显示装置的示意图。所述液晶显示装置包括扫描驱动电路1或扫描驱动电路2,所述扫描驱动电路1或2设置在所述液晶显示装置的两端,所述扫描驱动电路1或2为本发明任一种扫描驱动电路。
以上仅为本发明的实施方式,并非因此限制本发明的专利范围,凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换,或直接或间接运用在其他相关的技术领域,均同理包括在本发明的专利保护范围内。

Claims (20)

  1. 一种扫描驱动电路,其中,所述扫描驱动电路包括若干第一驱动电路(10)及若干第二驱动电路(20),每一所述第一驱动电路(10)与每一所述第二驱动电路(20)连接且所述第一驱动电路(10)及所述第二驱动电路(20)依次交替排列,每一所述第一驱动电路(10)及每一所述第二驱动电路(20)均包括上拉模块(200)、驱动所述上拉模块(200)的上拉控制模块(100)、基准电压端(VSS)及第一下拉维持单元(610),每一所述第一驱动电路(10)还包括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)及第二可控开关(T42),所述第二可控开关(T42)与所述第一可控开关(T32)的控制端相连,所述第二可控开关(T42)的输入端连接所述上拉控制模块(100)的输出端,所述第二可控开关(T42)及所述第一可控开关(T32)的输出端均连接所述基准电压端(VSS),所述第一可控开关(T32)的输入端连接一扫描线;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)及第五可控开关(T54),所述第三可控开关(T51)的输入端和控制端连接一第一下拉维持信号(LC1),所述第四可控开关(T53)的控制端连接所述第三可控开关(T51)的输出端,所述第四可控开关(T53)的输入端连接所述第一下拉维持信号(LC1),所述第四可控开关(T53)的输出端连接所述第一可控开关(T32)的控制端,所述第五可控开关(T54)的控制端连接一第二下拉维持信号(LC2),所述第五可控开关(T54)的输入端连接所述第一下拉维持信号(LC1),所述第五可控开关(T54)的输出端连接所述第一可控开关(T32)的控制端,所述第一下拉维持信号(LC1)与所述第二下拉维持信号(LC2)逻辑相反;
    当扫描线处于非工作时间内,所述第一驱动电路(10)的第一下拉维持控制单元(620)根据所述第一及第二下拉维持信号(LC1)及(LC2)控制所述第一及第二驱动电路(10)及(20)的所述第一下拉维持单元(610)中的所述第一可控开关(T32)和所述第二可控开关(T42)导通,所述第一可控开关(T32)将扫描线与基准电压端(VSS)连通,所述第二可控开关(T42)将所述上拉控制模块(100)与基准电压端(VSS)连通;
    当扫描线处于工作时间内,所述第一可控开关(T32)和所述第二可控开关(T42)断开,所述第一可控开关(T32)将扫描线与所述基准电压端(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)与所述基准电压端(VSS)的连通断开。
  2. 根据权利要求1所述的扫描驱动电路,其中,每一所述第一驱动电路(10)及每一所述第二驱动电路(20)还包括第二下拉维持单元(710),每一所述第一驱动电路(10)还包括第二下拉维持控制单元(720),所述第二下拉维持单元(710)包括第六可控开关(T33)及第七可控开关(T43),所述第六可控开关(T33)与所述第七可控开关(T43)的控制端相连,所述第七可控开关(T43)的输入端连接所述上拉控制模块(100)的输出端,所述第六可控开关(T33)及所述第七可控开关(T43)的输出端均连接所述基准电压端(VSS),所述第六可控开关(T33)的输入端连接所述扫描线;所述第二下拉维持控制单元(720)包括第八可控开关(T61)、第九可控开关(T63)及第十可控开关(T64),所述第八可控开关(T61)的输入端和控制端连接所述第二下拉维持信号(LC2),所述第九可控开关(T63)的控制端连接所述第八可控开关(T61)的输出端,所述第九可控开关(T63)的输入端连接所述第二下拉维持信号(LC2),所述第九可控开关(T63)的输出端连接所述第六可控开关(T33)的控制端,所述第十可控开关(T64)的控制端连接所述第一下拉维持信号(LC1),所述第十可控开关(T64)的输入端连接所述第二下拉维持信号(LC2),所述第十可控开关(T64)的输出端连接所述第六可控开关(T33)的控制端;
    当扫描线处于非工作时间内,所述第一驱动电路(10)的所述第二下拉维持控制单元(720)根据所述第一及第二下拉维持信号(LC1)及(LC2)控制所述第一及第二驱动电路(10)及(20)的所述第二下拉维持单元(710)中的所述第六可控开关(T33)和所述第七可控开关(T43)导通,所述第六可控开关(T33)将扫描线与基准电压端(VSS)连通,所述第七可控开关(T43)将所述上拉控制模块(100)与基准电压端(VSS)连通;
    当扫描线处于工作时间内,所述第六可控开关(T33)和所述第七可控开关(T43)断开,所述第六可控开关(T33)将扫描线与基准电压端(VSS)的连通断开,所述第七可控开关(T43)将所述上拉控制模块(100)与基准电压端(VSS)的连通断开。
  3. 根据权利要求2所述的扫描驱动电路,其中,每一所述第一驱动电路(10)及每一所述第二驱动电路(20)还包括平衡桥单元(800),所述平衡桥单元(800)包括第十一可控开关(T55),所述第十一可控开关(T55)的控制端连接所述上拉控制模块(100)的输出端,所述第十一可控开关(T55)的输入端及输出端分别连接所述第六可控开关(T33)及所述第一可控开关(T32)的控制端,所述第二驱动电路(20)的所述第十一可控开关(T55)的输入端还连接所述第一驱动电路(10)的所述第十一可控开关(T55)的输入端,所述第二驱动电路(20)的所述第十一可控开关(T55)的输出端还连接所述第一驱动电路(10)的所述第十一可控开关(T55)的输出端。
  4. 根据权利要求2所述的扫描驱动电路,其中,每一所述第一驱动电路(10)及每一所述第二驱动电路(20)还包括关断单元(900),所述关断单元(90)包括第十二可控开关(T52)及第十三可控开关(T62),所述第十二可控开关(T52)及所述第十三可控开关(T62)的控制端相连且均连接至所述上拉控制模块(100)的输出端,所述第十二可控开关(T52)的输入端连接所述第四可控开关(T53)的控制端,所述第十二可控开关(T52)的输出端连接所述基准电压端(VSS),所述第十三可控开关(T62)的输入端连接所述第九可控开关(T63)的控制端,所述第十三可控开关(T62)的输出端连接所述基准电压端(VSS)。
  5. 根据权利要求1所述的扫描驱动电路,其中,所述上拉控制模块(100)包括第十四可控开关(T11),所述第十四可控开关(T11)的控制端连接上级下传信号,所述第十四可控开关(T11)的输入端连接上级扫描信号,所述第十四可控开关(T11)的输出端即为所述上拉控制模块(100)的输出端;所述上拉模块(200)包括第十五可控开关(T21),所述第十五可控开关(T21)的控制端连接所述第十四可控开关(T11)的输出端,所述第十五可控开关(T21)的输入端连接一时钟扫描信号,所述第十五可控开关(T21)的输出端连接所述扫描线。
  6. 根据权利要求5所述的扫描驱动电路,其中,每一所述第一驱动电路(10)及每一所述第二驱动电路(20)还包括下传模块(300),所述下传模块(300)包括第十六可控开关(T22),所述第十六可控开关(T22)的控制端连接所述上拉控制模块(100)的输出端,所述第十六可控开关(T22)的输入端连接所述时钟扫描信号,所述第十六可控开关(T22)的输出端连接一上级下传信号。
  7. 根据权利要求1所述的扫描驱动电路,其中,每一所述第一驱动电路(10)及每一所述第二驱动电路(20)还包括下拉模块(400),所述下拉模块(400)包括第十七可控开关(T31)及第十八可控开关(T41),所述第十七可控开关(T31)及所述第十八可控开关(T41)的控制端相连且连接至一上级扫描线,所述第十八可控开关(T41)的输入端连接所述上拉控制模块(100)的输出端,所述第十七可控开关(T31)及所述第十八可控开关(T41)的输出端均连接所述基准电压端(VSS),所述第十八可控开关(T41)的输入端连接所述扫描线。
  8. 根据权利要求1所述的扫描驱动电路,其中,每一所述第一驱动电路(10)及每一所述第二驱动电路(20)还包括储能电容(Cb),所述存储电容(Cb)的一端连接所述上拉控制模块(100)的输出端,所述储能电容(Cb)的另一端连接所述扫描线。
  9. 根据权利要求1所述的扫描驱动电路,其中,每一所述第一驱动电路(10)及每一所述第二驱动电路(20)还包括下拉模块(400),所述下拉模块(400)包括第十七可控开关(T31)及第十八可控开关(T41),所述第十七可控开关(T31)的控制端连接一上级扫描线或上级下传信号,所述第十八可控开关(T41)的控制端连接一上级扫描线或上级下传信号,所述第十八可控开关(T41)的输入端连接所述上拉控制模块(100)的输出端,所述第十七可控开关(T31)及所述第十八可控开关(T41)的输出端均连接所述基准电压端(VSS),所述第十八可控开关(T41)的输入端连接所述扫描线。
  10. 一种液晶显示装置,其中,所述液晶显示装置包括扫描驱动电路,所述扫描驱动电路包括若干第一驱动电路(10)及若干第二驱动电路(20),每一所述第一驱动电路(10)与每一所述第二驱动电路(20)连接且所述第一驱动电路(10)及所述第二驱动电路(20)依次交替排列,每一所述第一驱动电路(10)及每一所述第二驱动电路(20)均包括上拉模块(200)、驱动所述上拉模块(200)的上拉控制模块(100)、基准电压端(VSS)及第一下拉维持单元(610),每一所述第一驱动电路(10)还包括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)及第二可控开关(T42),所述第二可控开关(T42)与所述第一可控开关(T32)的控制端相连,所述第二可控开关(T42)的输入端连接所述上拉控制模块(100)的输出端,所述第二可控开关(T42)及所述第一可控开关(T32)的输出端均连接所述基准电压端(VSS),所述第一可控开关(T32)的输入端连接一扫描线;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)及第五可控开关(T54),所述第三可控开关(T51)的输入端和控制端连接一第一下拉维持信号(LC1),所述第四可控开关(T53)的控制端连接所述第三可控开关(T51)的输出端,所述第四可控开关(T53)的输入端连接所述第一下拉维持信号(LC1),所述第四可控开关(T53)的输出端连接所述第一可控开关(T32)的控制端,所述第五可控开关(T54)的控制端连接一第二下拉维持信号(LC2),所述第五可控开关(T54)的输入端连接所述第一下拉维持信号(LC1),所述第五可控开关(T54)的输出端连接所述第一可控开关(T32)的控制端,所述第一下拉维持信号(LC1)与所述第二下拉维持信号(LC2)逻辑相反;
    当扫描线处于非工作时间内,所述第一驱动电路(10)的第一下拉维持控制单元(620)根据所述第一及第二下拉维持信号(LC1)及(LC2)控制所述第一及第二驱动电路(10)及(20)的所述第一下拉维持单元(610)中的所述第一可控开关(T32)和所述第二可控开关(T42)导通,所述第一可控开关(T32)将扫描线与基准电压端(VSS)连通,所述第二可控开关(T42)将所述上拉控制模块(100)与基准电压端(VSS)连通;
    当扫描线处于工作时间内,所述第一可控开关(T32)和所述第二可控开关(T42)断开,所述第一可控开关(T32)将扫描线与所述基准电压端(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)与所述基准电压端(VSS)的连通断开。
  11. 根据权利要求10所述的液晶显示装置,其中,每一所述第一驱动电路(10)及每一所述第二驱动电路(20)还包括第二下拉维持单元(710),每一所述第一驱动电路(10)还包括第二下拉维持控制单元(720),所述第二下拉维持单元(710)包括第六可控开关(T33)及第七可控开关(T43),所述第六可控开关(T33)与所述第七可控开关(T43)的控制端相连,所述第七可控开关(T43)的输入端连接所述上拉控制模块(100)的输出端,所述第六可控开关(T33)及所述第七可控开关(T43)的输出端均连接所述基准电压端(VSS),所述第六可控开关(T33)的输入端连接所述扫描线;所述第二下拉维持控制单元(720)包括第八可控开关(T61)、第九可控开关(T63)及第十可控开关(T64),所述第八可控开关(T61)的输入端和控制端连接所述第二下拉维持信号(LC2),所述第九可控开关(T63)的控制端连接所述第八可控开关(T61)的输出端,所述第九可控开关(T63)的输入端连接所述第二下拉维持信号(LC2),所述第九可控开关(T63)的输出端连接所述第六可控开关(T33)的控制端,所述第十可控开关(T64)的控制端连接所述第一下拉维持信号(LC1),所述第十可控开关(T64)的输入端连接所述第二下拉维持信号(LC2),所述第十可控开关(T64)的输出端连接所述第六可控开关(T33)的控制端;
    当扫描线处于非工作时间内,所述第一驱动电路(10)的所述第二下拉维持控制单元(720)根据所述第一及第二下拉维持信号(LC1)及(LC2)控制所述第一及第二驱动电路(10)及(20)的所述第二下拉维持单元(710)中的所述第六可控开关(T33)和所述第七可控开关(T43)导通,所述第六可控开关(T33)将扫描线与基准电压端(VSS)连通,所述第七可控开关(T43)将所述上拉控制模块(100)与基准电压端(VSS)连通;
    当扫描线处于工作时间内,所述第六可控开关(T33)和所述第七可控开关(T43)断开,所述第六可控开关(T33)将扫描线与基准电压端(VSS)的连通断开,所述第七可控开关(T43)将所述上拉控制模块(100)与基准电压端(VSS)的连通断开。
  12. 根据权利要求11所述的液晶显示装置,其中,每一所述第一驱动电路(10)及每一所述第二驱动电路(20)还包括平衡桥单元(800),所述平衡桥单元(800)包括第十一可控开关(T55),所述第十一可控开关(T55)的控制端连接所述上拉控制模块(100)的输出端,所述第十一可控开关(T55)的输入端及输出端分别连接所述第六可控开关(T33)及所述第一可控开关(T32)的控制端,所述第二驱动电路(20)的所述第十一可控开关(T55)的输入端还连接所述第一驱动电路(10)的所述第十一可控开关(T55)的输入端,所述第二驱动电路(20)的所述第十一可控开关(T55)的输出端还连接所述第一驱动电路(10)的所述第十一可控开关(T55)的输出端。
  13. 根据权利要求11所述的液晶显示装置,其中,每一所述第一驱动电路(10)及每一所述第二驱动电路(20)还包括关断单元(900),所述关断单元(90)包括第十二可控开关(T52)及第十三可控开关(T62),所述第十二可控开关(T52)及所述第十三可控开关(T62)的控制端相连且均连接至所述上拉控制模块(100)的输出端,所述第十二可控开关(T52)的输入端连接所述第四可控开关(T53)的控制端,所述第十二可控开关(T52)的输出端连接所述基准电压端(VSS),所述第十三可控开关(T62)的输入端连接所述第九可控开关(T63)的控制端,所述第十三可控开关(T62)的输出端连接所述基准电压端(VSS)。
  14. 根据权利要求10所述的液晶显示装置,其中,所述上拉控制模块(100)包括第十四可控开关(T11),所述第十四可控开关(T11)的控制端连接上级下传信号,所述第十四可控开关(T11)的输入端连接上级扫描信号,所述第十四可控开关(T11)的输出端即为所述上拉控制模块(100)的输出端;所述上拉模块(200)包括第十五可控开关(T21),所述第十五可控开关(T21)的控制端连接所述第十四可控开关(T11)的输出端,所述第十五可控开关(T21)的输入端连接一时钟扫描信号,所述第十五可控开关(T21)的输出端连接所述扫描线。
  15. 根据权利要求14所述的液晶显示装置,其中,每一所述第一驱动电路(10)及每一所述第二驱动电路(20)还包括下传模块(300),所述下传模块(300)包括第十六可控开关(T22),所述第十六可控开关(T22)的控制端连接所述上拉控制模块(100)的输出端,所述第十六可控开关(T22)的输入端连接所述时钟扫描信号,所述第十六可控开关(T22)的输出端连接一上级下传信号。
  16. 根据权利要求10所述的液晶显示装置,其中,每一所述第一驱动电路(10)及每一所述第二驱动电路(20)还包括下拉模块(400),所述下拉模块(400)包括第十七可控开关(T31)及第十八可控开关(T41),所述第十七可控开关(T31)及所述第十八可控开关(T41)的控制端相连且连接至一上级扫描线,所述第十八可控开关(T41)的输入端连接所述上拉控制模块(100)的输出端,所述第十七可控开关(T31)及所述第十八可控开关(T41)的输出端均连接所述基准电压端(VSS),所述第十八可控开关(T41)的输入端连接所述扫描线。
  17. 根据权利要求10所述的液晶显示装置,其中,每一所述第一驱动电路(10)及每一所述第二驱动电路(20)还包括储能电容(Cb),所述存储电容(Cb)的一端连接所述上拉控制模块(100)的输出端,所述储能电容(Cb)的另一端连接所述扫描线。
  18. 根据权利要求10所述的液晶显示装置,其中,每一所述第一驱动电路(10)及每一所述第二驱动电路(20)还包括下拉模块(400),所述下拉模块(400)包括第十七可控开关(T31)及第十八可控开关(T41),所述第十七可控开关(T31)的控制端连接一上级扫描线或上级下传信号,所述第十八可控开关(T41)的控制端连接一上级扫描线或上级下传信号,所述第十八可控开关(T41)的输入端连接所述上拉控制模块(100)的输出端,所述第十七可控开关(T31)及所述第十八可控开关(T41)的输出端均连接所述基准电压端(VSS),所述第十八可控开关(T41)的输入端连接所述扫描线。
  19. 一种扫描驱动电路,其中,所述扫描驱动电路包括若干第一驱动电路(10)及若干第二驱动电路(20),每一所述第一驱动电路(10)与每一所述第二驱动电路(20)连接且所述第一驱动电路(10)及所述第二驱动电路(20)依次交替排列,每一所述第一驱动电路(10)及每一所述第二驱动电路(20)均包括上拉模块(200)、驱动所述上拉模块(200)的上拉控制模块(100)、基准电压端(VSS)及第一下拉维持单元(610),每一所述第一驱动电路(10)还包括第一下拉维持控制单元(620); 所述上拉控制模块(100)包括第十四可控开关(T11),所述第十四可控开关(T11)的控制端连接上级下传信号,所述第十四可控开关(T11)的输入端连接上级扫描信号,所述第十四可控开关(T11)的输出端即为所述上拉控制模块(100)的输出端;所述上拉模块(200)包括第十五可控开关(T21),所述第十五可控开关(T21)的控制端连接所述第十四可控开关(T11)的输出端,所述第十五可控开关(T21)的输入端连接一时钟扫描信号,所述第十五可控开关(T21)的输出端连接所述扫描线;每一所述第一驱动电路(10)及每一所述第二驱动电路(20)还包括储能电容(Cb),所述存储电容(Cb)的一端连接所述上拉控制模块(100)的输出端,所述储能电容(Cb)的另一端连接所述扫描线;
    所述第一下拉维持单元(610)包括第一可控开关(T32)及第二可控开关(T42),所述第二可控开关(T42)与所述第一可控开关(T32)的控制端相连,所述第二可控开关(T42)的输入端连接所述上拉控制模块(100)的输出端,所述第二可控开关(T42)及所述第一可控开关(T32)的输出端均连接所述基准电压端(VSS),所述第一可控开关(T32)的输入端连接一扫描线;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)及第五可控开关(T54),所述第三可控开关(T51)的输入端和控制端连接一第一下拉维持信号(LC1),所述第四可控开关(T53)的控制端连接所述第三可控开关(T51)的输出端,所述第四可控开关(T53)的输入端连接所述第一下拉维持信号(LC1),所述第四可控开关(T53)的输出端连接所述第一可控开关(T32)的控制端,所述第五可控开关(T54)的控制端连接一第二下拉维持信号(LC2),所述第五可控开关(T54)的输入端连接所述第一下拉维持信号(LC1),所述第五可控开关(T54)的输出端连接所述第一可控开关(T32)的控制端,所述第一下拉维持信号(LC1)与所述第二下拉维持信号(LC2)逻辑相反;
    当扫描线处于非工作时间内,所述第一驱动电路(10)的第一下拉维持控制单元(620)根据所述第一及第二下拉维持信号(LC1)及(LC2)控制所述第一及第二驱动电路(10)及(20)的所述第一下拉维持单元(610)中的所述第一可控开关(T32)和所述第二可控开关(T42)导通,所述第一可控开关(T32)将扫描线与基准电压端(VSS)连通,所述第二可控开关(T42)将所述上拉控制模块(100)与基准电压端(VSS)连通;
    当扫描线处于工作时间内,所述第一可控开关(T32)和所述第二可控开关(T42)断开,所述第一可控开关(T32)将扫描线与所述基准电压端(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)与所述基准电压端(VSS)的连通断开。
  20. 根据权利要求19所述的扫描驱动电路,其中,每一所述第一驱动电路(10)及每一所述第二驱动电路(20)还包括第二下拉维持单元(710),每一所述第一驱动电路(10)还包括第二下拉维持控制单元(720),所述第二下拉维持单元(710)包括第六可控开关(T33)及第七可控开关(T43),所述第六可控开关(T33)与所述第七可控开关(T43)的控制端相连,所述第七可控开关(T43)的输入端连接所述上拉控制模块(100)的输出端,所述第六可控开关(T33)及所述第七可控开关(T43)的输出端均连接所述基准电压端(VSS),所述第六可控开关(T33)的输入端连接所述扫描线;所述第二下拉维持控制单元(720)包括第八可控开关(T61)、第九可控开关(T63)及第十可控开关(T64),所述第八可控开关(T61)的输入端和控制端连接所述第二下拉维持信号(LC2),所述第九可控开关(T63)的控制端连接所述第八可控开关(T61)的输出端,所述第九可控开关(T63)的输入端连接所述第二下拉维持信号(LC2),所述第九可控开关(T63)的输出端连接所述第六可控开关(T33)的控制端,所述第十可控开关(T64)的控制端连接所述第一下拉维持信号(LC1),所述第十可控开关(T64)的输入端连接所述第二下拉维持信号(LC2),所述第十可控开关(T64)的输出端连接所述第六可控开关(T33)的控制端;
    当扫描线处于非工作时间内,所述第一驱动电路(10)的所述第二下拉维持控制单元(720)根据所述第一及第二下拉维持信号(LC1)及(LC2)控制所述第一及第二驱动电路(10)及(20)的所述第二下拉维持单元(710)中的所述第六可控开关(T33)和所述第七可控开关(T43)导通,所述第六可控开关(T33)将扫描线与基准电压端(VSS)连通,所述第七可控开关(T43)将所述上拉控制模块(100)与基准电压端(VSS)连通;
    当扫描线处于工作时间内,所述第六可控开关(T33)和所述第七可控开关(T43)断开,所述第六可控开关(T33)将扫描线与基准电压端(VSS)的连通断开,所述第七可控开关(T43)将所述上拉控制模块(100)与基准电压端(VSS)的连通断开。
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