WO2015106464A1 - 集成栅极驱动电路及具有集成栅极驱动电路的显示面板 - Google Patents
集成栅极驱动电路及具有集成栅极驱动电路的显示面板 Download PDFInfo
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- WO2015106464A1 WO2015106464A1 PCT/CN2014/071377 CN2014071377W WO2015106464A1 WO 2015106464 A1 WO2015106464 A1 WO 2015106464A1 CN 2014071377 W CN2014071377 W CN 2014071377W WO 2015106464 A1 WO2015106464 A1 WO 2015106464A1
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- gate
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- electrically connected
- driving unit
- input terminal
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- 239000010409 thin film Substances 0.000 claims abstract description 372
- 239000003990 capacitor Substances 0.000 claims description 79
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Classifications
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- 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
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3648—Control of matrices with row and column drivers using an active matrix
-
- 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
- G09G2300/0439—Pixel structures
- G09G2300/0465—Improved aperture ratio, e.g. by size reduction of the pixel circuit, e.g. for improving the pixel density or the maximum displayable luminance or brightness
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- 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
- G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
- G09G2300/0876—Supplementary capacities in pixels having special driving circuits and electrodes instead of being connected to common electrode or ground; Use of additional capacitively coupled compensation electrodes
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0209—Crosstalk reduction, i.e. to reduce direct or indirect influences of signals directed to a certain pixel of the displayed image on other pixels of said image, inclusive of influences affecting pixels in different frames or fields or sub-images which constitute a same image, e.g. left and right images of a stereoscopic display
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/04—Maintaining the quality of display appearance
- G09G2320/043—Preventing or counteracting the effects of ageing
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/04—Maintaining the quality of display appearance
- G09G2320/043—Preventing or counteracting the effects of ageing
- G09G2320/045—Compensation of drifts in the characteristics of light emitting or modulating elements
Definitions
- the present invention relates to the field of display technologies, and in particular, to an integrated gate driving circuit (Gate Drive circuit display panel t
- the liquid crystal display has many advantages such as thin body, low power consumption, low radiation, and the like, and has been widely used.
- Most of the liquid crystal displays on the existing market are projection type liquid crystal displays, which include a liquid crystal panel and a backlight module.
- the working principle of the liquid crystal panel is to place liquid crystal molecules in two parallel glass substrates, and apply driving voltages on the two glass substrates to control the rotation direction of the liquid crystal molecules, thereby modulating the light emission of the backlight module to generate a picture.
- the integrated display driving circuit is a peripheral circuit such as a gate driving circuit and a data driving circuit, which is implemented by a thin film transistor (TFT) and is formed on a TFT substrate together with a pixel thin film transistor.
- TFT thin film transistor
- the integrated gate drive method not only reduces the number of peripheral drive chips and their pinch-off procedure compared to conventional circuit (IC) drive methods. It reduces costs and makes the display peripheral slimmer, making the display module more compact and enhancing mechanical and electrical reliability.
- the integrated gate drive circuit based on amorphous silicon thin film transistor technology has been extensively studied.
- amorphous silicon TFT technology has the advantages of low process temperature, good device uniformity, low cost, etc., and is currently the mainstream TFT technology; on the other hand, the mobility of amorphous silicon TFT can meet the requirements of the operating frequency of the gate drive circuit.
- the stability of amorphous silicon TFTs is relatively poor, and severe threshold voltage drift occurs under long-term voltage stress bias, which seriously affects the life of the circuit.
- a pull-down circuit In the integrated gate drive circuit, a pull-down circuit is usually required to maintain the circuit output signal low.
- the pull-down thin film transistor in the pull-down circuit is usually subjected to a long time voltage stress, which is the key factor affecting the life of the integrated gate drive circuit.
- Device The existing integrated gate drive circuit design usually adopts a low voltage DC bias, a double pull-down structure, a high frequency pulse offset or a reduced voltage signal duty ratio to reduce the threshold voltage drift of the pull-down thin film transistor.
- the object of the present invention is to provide an integrated gate driving circuit which adopts a double pull-down structure, so that the thin film transistors in the pull-down unit and the pull-down unit in the circuit can be in a bipolar voltage biased working environment, effectively suppressing the pull-down unit and The threshold voltage drift of the thin film transistor in the additional pull-down unit prolongs the working life of the circuit, so that the circuit can better meet the requirements of large and medium-sized display panels, and at the same time, the circuit structure is simple, the power consumption is low, and the low temperature and high temperature are also suitable. jobs.
- Another object of the present invention is to provide a display panel having an integrated gate driving circuit, which can reduce the number of peripheral driving chips and the sealing process thereof, reduce the cost, and can make the periphery of the display thinner and make the display mode
- the group is more compact and the mechanical and electrical reliability is enhanced.
- the present invention provides an integrated gate driving circuit including a cascaded multi-level gate driving unit and a multi-stage additional gate driving unit, wherein
- the nth stage gate driving unit has a ⁇ -2 stage signal input end, an n+l level signal input end, an n+3th stage signal input end, a high frequency clock signal first input end, and a low frequency clock signal An input end, a low frequency clock signal, a second input end, a low level input end, and a first output end, a second output end, wherein the first output end of the nth stage array substrate row driving unit is used to drive the display panel.
- the m-th stage additional cabinet driving unit has an m-1th stage plus signal input end, a high frequency clock signal first input end, a high frequency clock signal second input end, a low frequency clock signal first input end, and a low frequency clock signal a second input terminal, a low level input terminal, a first additional output terminal, and a second additional output terminal;
- the nth stage cabinet driving unit is any one of the fourth stage to the fourth stage gate driving unit
- the nth stage signal input end of the nth stage gate driving unit Electrically connected to the first output end of the 11-2th stage gate driving unit
- the 11+1th stage signal input end of the nth stage gate driving unit is electrically connected to the n+1th stage gate driving unit a second output end
- the n+3th stage signal input end of the nth stage ⁇ -pole driving unit is electrically connected to the n+3th stage.
- the first output end of the gate driving unit; the nth stage The first output end of the gate driving unit is electrically connected Connected to the 1st to 2nd stage signal input end of the rH 2th stage gate driving unit and the nth to 3rd stage gate of the nth to 3rd stage driving unit; the nth stage tree driving unit
- the second output terminal is electrically connected to the n+1th level signal input end of the n-1th stage gate driving unit;
- the ⁇ -th stage signal input end of the n-th stage ⁇ -pole driving unit is configured to input a pulse activation signal;
- the nth stage signal input end of the nth stage gate driving unit is electrically connected to the second output end of the nth stage driving unit;
- the 11th to 3rd stage signals of the nth stage gate driving unit The input end is electrically connected to the first output end of the n+3th gate driving unit;
- the first output end of the nth stage gate driving unit is electrically connected to the nth+2th stage driving unit ⁇ - level 2 signal input terminal;
- the second output end of the nth stage ⁇ -pole driving unit is suspended;
- the 1st-stage signal input end of the n-th stage ⁇ -pole driving unit is configured to input a pulse activation signal;
- the rH-1 stage signal input end of the nth stage gate driving unit is electrically connected to the second output end of the nth + 4th stage gate driving unit;
- the 11th-th row of the nth stage gate driving unit The level 3 signal input end is electrically connected to the first output end of the n+3th stage gate driving unit;
- the first output end of the nth stage gate driving unit is electrically connected to the n+2th stage ⁇ -pole a ri-2 stage signal input end of the driving unit;
- the second output end of the nth stage slab driving unit is electrically connected to the n+ lth stage signal input end of the 11th 1st stage driving unit;
- the nth stage gate driving unit is a third stage gate driving unit
- the ⁇ -2 stage signal input end of the nth stage gate driving unit is electrically connected to the n-2th stage gate driving a first output end of the unit
- the n+1th stage signal input end of the nth stage gate driving unit is electrically connected to the second output end of the n+I stage cabinet driving unit
- the nth stage gate The first signal input end of the pole drive unit is electrically connected to the first output end of the n+3th cabinet drive unit
- the first output end of the nth stage tree drive unit is electrically connected to the rH-2
- the n-th stage signal input end of the stage gate driving unit; the second output end of the 11th stage gate driving unit is electrically connected to the third stage
- the first stage _ _ _ pole drive unit is the third-order gate drive unit, the n-th stage signal input terminal of the first-stage gate drive unit is electrically connected to the n- 2 a first output end of the stage gate driving unit; the n+th stage signal input end of the nth stage gate driving unit is electrically connected to the second output end of the n+l stage gate driving unit; The n-th-3th stage signal input end of the nth stage gate driving unit is electrically connected to the first additional output end of the first stage additional gate driving unit; the first output end of the nth stage gate driving unit are electrically connected to the second stage 11 + 2 gate driving unit of the n + ⁇ stage 3 stage 2 signal input terminal and the signal input stage of the gate driving unit of eta-3; n-th stage of the gate ⁇ I The second output end of the driving unit is electrically connected to the n-1th gate The n-th stage signal input terminal of the pole drive unit;
- the nth stage gate driving unit is the penultimate stage cabinet driving unit
- the nth level signal input end of the nth stage gate driving unit is electrically connected to the nth to 2nd stage gate driving a first output end of the unit
- the n+1th stage signal input end of the nth stage porch pole driving unit is electrically connected to the second output end of the n+1th stage gate driving unit
- the nf-3 stage signal input end of the bridge driving unit is electrically connected to the first additional output end of the second stage plus gate driving unit
- the first output end of the nth stage tree driving unit is electrically connected a signal input terminal of the 11th-Kth grade driving unit of the n-th grade
- the second output end of the 11th stage gate driving unit is electrically connected to the nth of the first-stage gate driving unit +1 level signal input;
- the nth stage gate driving unit is a reciprocal first stage gate driving unit
- the nth to 2th stage signal input end of the nth stage gate driving unit is electrically connected to the nth level 2 gate driving unit
- the first output terminal of the nth stage gate driving unit is electrically connected to the second additional output terminal of the first stage additional gate driving unit;
- the nth stage gate The n+3th stage signal input end of the driving unit is electrically connected to the first additional output end of the third stage additional gate driving unit;
- the first output end of the nth stage gate driving unit is respectively connected to the nth level 3
- the n+3th stage signal input end of the pole drive unit and the mth-stage additional signal input end of the first stage additional gate drive unit are electrically connected;
- the second output end of the nth stage gate drive unit Electrically connected to the nth-th stage signal input terminal of the n-1th stage gate driving unit;
- the m-th stage additional gate driving unit is any additional gate driving unit of the fourth stage to the last-numbered first-stage plus gate driving unit
- the m-th of the m-th stage additional pole driving unit The first additional signal input end is electrically connected to the first additional output end of the m-th stage additional gate driving unit, and the first additional output end of the m-th stage additional gate driving unit is electrically connected to the m-th
- the m-th stage-added signal input end of the l-stage additional gate driving unit, the second additional output end is suspended;
- the m-th-stage plus signal input end of the m-th stage additional gate driving unit is electrically connected to the countdown first a first output end of the stage gate driving unit, a first output terminal of the mth stage additional gate driving unit and an m1 level additional signal input of the m+ith stage additional gate driving unit
- the first and third output terminals of the third-stage gate driving unit are electrically connected, and the second additional output is electrically connected to the n-th level signal of the last-stage first-level driving unit.
- the m-th stage additional gate driving unit is the second-stage additional gate driving unit
- the m-th stage additional signal input end of the m-th stage additional ⁇ -pole driving unit is electrically connected to the m1th a first additional output of the stage additional gate drive unit
- the mth stage additional gate drive unit The first additional output is electrically connected to the m-th stage additional signal input end of the m+1th additional gate driving unit and the ⁇ - ⁇ stage signal input end of the penultimate stage drain driving unit, respectively.
- the second additional output is suspended;
- the m-th stage additional signal input end of the m-th stage additional gate driving unit is electrically connected to the m-th stage additional a first additional output end of the gate driving unit, a first output terminal of the m-th stage-added gate driving unit and an m-th level of the m-th-th phase-added tree driving unit
- the signal input terminal and the first stage signal input end of the first-order gate drive unit are electrically connected, and the second additional output terminal is suspended;
- the gate driving unit further includes:
- the driving unit is electrically connected to the ri-2 signal input end, the high frequency clock signal first input end, the n-th stage signal input end, the first output end and the second output end respectively;
- the pull-down unit is electrically connected to the n+1th stage signal input end, the low frequency clock signal first input end, the low frequency clock signal second input end, the low level input end and the driving unit;
- the m-th stage additional gate driving unit of the integrated gate driving circuit further includes:
- the additional driving unit is electrically connected to the m-th level additional signal input end, the high frequency clock signal first input end, the high frequency clock signal second input end, the first additional output end and the second additional output end respectively;
- the additional pull-down unit is electrically connected to the first input end of the low frequency clock signal, the second input end of the low frequency clock signal, the low level input end and the additional driving unit respectively.
- the input signal of the low-level input terminal is a low-level signal;
- the input signal of the first input end of the high-frequency clock signal and the second input end of the high-frequency clock signal is a second high-frequency clock signal of the first high-frequency clock signal, a third high frequency clock signal or a fourth high frequency clock signal, wherein the first high frequency clock signal is opposite in phase to the third high frequency clock signal, and the second high frequency clock signal is opposite in phase to the fourth high frequency clock signal,
- the first high frequency clock signal and the third high frequency clock signal are the same as the second high frequency clock signal and the fourth high frequency clock signal waveform but have different initial phases;
- the high frequency clock signal of the gate driving unit is the first high frequency clock signal when the input signal of the first input end is the first high frequency clock signal, the n+1th stage, n ⁇ 2 stage, 11+-3 stage gate driving unit
- the input signal of the first input end of the high frequency clock signal is a second, third, and fourth high frequency clock signal;
- the first input end of the high frequency clock signal of the mth stage additional gate driving unit of the integrated pole driving circuit and the input signal of the second input end of the high frequency clock signal are the kth and k-1th clock signals, respectively
- the first input end of the high frequency clock signal of the m+th stage additional gate driving unit of the integrated bridge driving circuit and the input signal of the second input end of the high frequency clock signal are respectively k+I and
- the kth clock signal, the k value is 1 to 4, the k-i value is 4 when k is i, and the k+1 value is 1 when k is 4.
- the input signal of the first input end of the low frequency clock signal and the second input end of the low frequency clock signal is a first low frequency clock signal or a second low frequency clock signal, and the first low frequency clock signal is complementary to the second low frequency clock signal voltage;
- the input signal of the low frequency clock signal of the nth stage cabinet driving unit of the integrated gate driving circuit and the second input end of the low frequency clock signal are the first low frequency clock signal and the second low frequency clock signal, respectively
- the first input end of the low frequency clock signal of the n+1th stage gate driving unit and the input signal of the second input end of the low frequency clock signal are respectively a second low frequency clock signal and a first low frequency clock signal;
- the input signal of the low frequency clock signal of the mth stage additional gate driving circuit of the integrated gate driving circuit and the second input end of the low frequency clock signal are respectively the first low frequency clock signal and the second low frequency clock signal
- the first input end of the low frequency clock signal of the m+1th additional gate driving unit and the input signal of the second input end of the low frequency clock signal are respectively a second low frequency clock signal and a first low frequency clock signal.
- the driving unit includes a capacitor, a first thin film transistor, a second thin film transistor, and a third thin film transistor, the first thin film transistor has a first first source and a first drain, and the second thin film transistor Having a second gate, a second source, and a second drain, the third thin film transistor has a third gate, a third source, and a third drain, wherein the first *pole and the first drain are both Electrically connected to the signal input end of the 1st to 2nd stages, the first source is electrically connected to one end of the capacitor, the second ⁇ -pole, the third drain, the second output end, and the pull-down unit, respectively
- the second drain is electrically connected to the first input end of the high frequency clock signal, and the second source is electrically connected to the other end of the capacitor, the first output end and the pull-down unit, the third gate and the
- the ⁇ + ⁇ 3 level signal input end is electrically connected
- the third source is electrically connected to the low level input end;
- the additional drive unit includes an additional capacitor. a twenty-first thin film transistor, a twenty-second thin film transistor, and a twenty-third thin film transistor, wherein the twenty-first thin film transistor has a second eleven gate, a twenty-first source, and a twenty-first drain
- the twenty-second thin film transistor has a twenty-second gate, a twenty-second source, and a twenty-second drain
- the twenty-third thin film transistor has a twenty-third gate, a twentieth a third source and a twenty-third drain
- the second eleventh gate, the twenty-first drain, and the twenty-second drain are electrically connected to the m-th level additional signal input terminal
- the twenty-first source is electrically connected to one end of the additional capacitor, the twenty-third gate, the second source, the third output, and the additional pull-down unit, and the second twelve-gate
- the second input end of the high frequency clock signal is electrically connected
- the second thirteenth drain is electrically connected to the first input end of the high frequency clock signal, and the other end
- the pull-down unit includes a first pull-down unit, a first pull-down signal generating unit, a second pull-down unit, and a second pull-down signal generating unit.
- the first pull-down unit and the driving unit and the first pull-down signal respectively The generating unit, the second pull-down unit and the low-level input end are electrically connected, and the first pull-down signal generating unit and the first pull-down unit, the first input end of the low-frequency clock signal, the second input end of the low-frequency clock signal, and the low-voltage
- the second pull-down unit is electrically connected to the driving unit, the second pull-down signal generating unit, the first pull-down unit and the low-level input end, and the second pull-down signal generating unit respectively a second pull-down unit, a first input end of the low frequency clock signal, a second input end of the low frequency clock signal, and a low level input end are electrically connected;
- the first pull-down unit includes a fourth thin film transistor and a fifth thin film transistor, the fourth thin film transistor has a fourth gate, a fourth source, and a fourth drain, and the fifth gate of the fifth thin film transistor a fourth source and a fifth drain, wherein the fourth gate and the fifth gate are electrically connected to the first pull-down signal generating unit, and the fourth drain and the first drain respectively
- the source, the one end of the capacitor, the second gate, the third drain, the second output, the second pull-down signal generating unit, and the second pull-down unit are electrically connected, and the fourth source and the fifth source are both Electrically connected to the low-level input terminal, the fifth drain is electrically connected to the second source, the other end of the capacitor, the first output end, and the second pull-down unit;
- the second pull-down unit includes a sixth thin film transistor and a seventh thin film transistor, the sixth thin film transistor has a sixth gate, a sixth source, and a sixth drain, and the seventh gate of the seventh thin film transistor, a seventh source and a seventh drain, wherein the sixth gate and the seventh gate are electrically connected to the second pull-down signal generating unit, the sixth source, the first The seven sources are electrically connected to the low level input terminal; the sixth drain is respectively connected to the first source, the end of the capacitor, the second gate, the third drain, the fourth drain, and the second output And the second pull-down signal generating unit is electrically connected, wherein the seventh source is electrically connected to the second source, the other end of the capacitor, the first output end, and the fifth drain;
- the first pull-down signal generating unit includes an eighth thin film transistor, a ninth thin film transistor, a tenth thin film transistor, an eleventh thin film transistor, and a twelfth thin film transistor, and the eighth thin film transistor has an eighth cabinet eighth a source electrode and an eighth drain, the ninth thin film transistor has a ninth gate, a ninth source, and a ninth drain, and the tenth thin film transistor has a tenth cabinet tenth source and a tenth drain
- the eleventh thin film transistor has an eleventh cabinet, an eleventh source and an eleventh drain, and the twelfth thin film transistor has a twelfth gate, a twelfth source, and a twelfth
- the eighth gate, the eighth drain, the ninth drain, and the tenth cabinet are electrically connected to the second input end of the low frequency clock signal, and the eighth source is respectively connected to the ninth source
- the tenth drain, the fourth gate, and the fifth gate are electrically connected, and the tenth source
- the second pull-down signal generating unit includes a fourteenth thin film transistor, a fifteenth thin film transistor sixteenth thin film transistor, a seventeenth thin film transistor, and an eighteenth thin film transistor, and the tenth thin film transistor has a fourteenth gate a tenth source and a fourteenth drain, the fifteenth thin film transistor having a fifteenth gate, a fifteenth source and a fifteenth drain, and the sixteenth thin film transistor has a sixteenth a gate electrode, a sixteenth source electrode, and a sixteenth drain electrode, wherein the seventeenth thin film transistor has a seventeenth gate, a seventeenth source, and a seventeenth drain, and the eighteenth thin film transistor has a
- the eighteenth gate, the eighteenth source, and the eighteenth drain, the fourteenth gate, the fourteenth drain, the fifteenth drain, and the sixteenth cabinet are all electrically connected to the low frequency clock signal
- the first input end, the fourteenth source is electrically connected to the fifteenth source, the sixteenth drain,
- the ninth cabinet is electrically connected to the first input end of the low frequency clock signal; the fifteenth gate is electrically connected to the second input end of the low frequency clock signal.
- the ninth gate is electrically connected to the eighth source, the ninth source, the tenth drain, the fourth ⁇ -pole, and the fifth gate, respectively; the fifteenth gate and the The fourteenth source, the fifteenth source, the sixteenth drain, the sixth gate, and the seventh gate are electrically connected.
- the first pull-down signal generating unit further includes a thirteenth thin film transistor, wherein the thirteenth thin film transistor has a thirteenth gate, a thirteenth source, and a thirteenth drain, and the thirteenth gate Electrically connecting to the first cabinet, the first drain, and the n-th level signal input end, respectively, the thirteenth drain and the tenth source, the eleventh drain a twelfth drain electrical connection; the thirteenth source is electrically connected to the low level input terminal;
- the second pull-down signal generating unit further includes a nineteenth thin film transistor, wherein the nineteenth thin film transistor has a nineteenth*th, a nineteenth source, and a nineteenth drain, wherein the nineteenth gate respectively Electrically connecting with the thirteenth cabinet, the first gate, the first drain, and the first and second stage signal input ends, wherein the nineteenth drain and the sixteenth source respectively .
- the eighteenth drain is electrically connected; the nineteenth source is electrically connected to the low level input end.
- the nth stage gate driving unit further has an nth to 1st stage signal input end, and a third output End, when the nth stage gate driving unit is any one of the second stage to the last stage gate driving unit, the nth-th level signal of the nth stage* driving unit
- the input end is electrically connected to the third output end of the n-1th stage gate driving unit; when the 11th stage gate driving unit is the first stage gate driving unit, the nth stage shed_
- the pole driving unit does not have an n-th stage signal input end; when the nth stage gate driving unit is any one of the first stage to the penultimate stage ⁇ .
- the third output end of the class II gate driving unit is electrically connected to the nth level signal input end of the n+1th stage gate driving unit; when the 11th stage gate driving unit is the last stage In the gate driving unit, the third output end of the nth stage gate driving unit is suspended;
- the pull-down unit includes a first pull-down unit, a second pull-down unit, and a second pull-down signal generating unit, where the first pull-down unit and the driving unit, the n1-th stage signal input end, and the low-level input end respectively
- the second pull-down unit is electrically connected to the driving unit, the second pull-down signal generating unit, the first pull-down unit and the low-level input end, and the second pull-down signal generating unit and the driving unit are respectively a second pull-down unit, a first input end of the low frequency clock signal, a second input end of the low frequency clock signal, and a low level input end are electrically connected;
- the first pull-down unit includes a fourth thin film transistor and a fifth thin film transistor, the fourth thin film transistor has a fourth gate, a fourth source, and a fourth drain, and the fifth thin film transistor has a fifth gate a fourth, a fifth, and a fifth drain, wherein the fourth and second terminals are electrically connected to the signal input terminal of the 11th to the first stage, and the fourth drain and the first
- the source, the one end of the capacitor, the second gate, the third drain, the second output, the second pull-down signal generating unit and the second pull-down unit are electrically connected, and the fourth source and the fifth source are electrically connected Connected to the low-level input terminal, the fifth drain is electrically connected to the second source, the other end of the capacitor, the first output end, and the second pull-down unit;
- the second pull-down unit includes a sixth thin film transistor and a seventh thin film transistor, the sixth thin film transistor has a sixth gate, a sixth source, and a sixth drain, and the seventh thin film transistor has a seventh cabinet a seventh source and a seventh drain, wherein the sixth gate is electrically connected to the second pull-down signal generating unit, the seventh gate, and the third output, and the sixth drain is respectively connected to the first The source, the capacitor, the second gate, the third drain, the fourth drain, the second output, and the second pull-down signal generating unit are electrically connected, and the sixth source and the seventh source are electrically connected Connected to the low level input terminal, the seventh drain is electrically connected to the second source, the other end of the capacitor, the first output end and the fifth drain;
- the second pull-down signal generating unit includes a tenth thin film transistor, a fifteenth thin film transistor, a sixteenth thin film transistor, a seventeenth thin film transistor, and an eighteenth thin film transistor, and the fourteenth thin film transistor has a fourteenth gate a pole, a fourteenth source, and a fourteenth drain, the fifteenth The thin film transistor has a fifteenth gate, a fifteenth source and a fifteenth drain, and the sixteenth thin film transistor has a sixteenth gate, a sixteenth source, and a tenth drain, the The seventeenth thin film transistor has a seventeenth gate, a seventeenth source, and a seventeenth drain, and the eighteenth thin film transistor has an eighteenth bridge, an eighteenth source, and an eighteenth drain.
- the fourteenth gate, the fourteenth drain, the fifteenth drain, and the sixteenth shed are electrically connected to the first input end of the low frequency clock signal, and the fourteenth source and the The fifteenth source, the sixteenth drain, the sixth gate, the seventh gate and the third output are electrically connected, and the sixteenth source and the seventeenth drain and the eighteenth drain respectively An electrically connected, the seventeen gates are electrically connected to the first source, the one end of the capacitor, the second cabinet, the third drain, the fourth drain, and the sixth drain, respectively
- the seven source and the eighteenth source are electrically connected to the low level input end, and the eighteenth pole is electrically connected to the n+1th stage signal input end.
- the fifteenth gate is electrically connected to the second input end of the low frequency clock signal.
- the fifteenth t-pole is electrically connected to the fourteenth source, the fifteenth source, the sixteenth drain, the sixth gate, the seventh tree, and the third output.
- the second pull-down signal generating unit further includes a nineteenth thin film transistor, wherein the nineteenth thin film transistor has a nineteenth gate, a nineteenth source, and a nineteenth drain, wherein the nineteenth gate respectively Electrically connecting with the first gate, the first drain, and the first and second stage signal input ends, wherein the nineteenth drain and the sixteenth source and the seventeenth drain respectively The eighteenth drain is electrically connected; the nineteenth drain is electrically connected to the low level input end.
- the additional pull-down unit includes a first additional pull-down unit, a first additional pull-down signal generating unit, a second additional pull-down unit, and a second additional pull-down signal generating unit; wherein the first additional pull-down unit and the additional driving unit respectively
- An additional pull-down signal generating unit, a second additional pull-down unit and a low-level input terminal are electrically connected, and the first additional pull-down signal generating unit and the first additional pull-down unit, the first input end of the low-frequency clock signal, and the second low-frequency clock signal respectively
- the input terminal and the low-level input terminal are electrically connected, and the second additional pull-down unit is electrically connected to the additional driving unit, the second ⁇ -add-down signal generating unit, the first additional pull-down unit, and the low-level input terminal respectively.
- the second additional pull-down signal generating unit is electrically connected to the second additional pull-down unit, the first input end of the low-frequency clock signal, the second input end of the low-frequency clock signal, and
- the first additional pull-down unit includes a twentieth is? thin film transistor and a twenty-fifth thin film transistor, and the twenty-fourth thin film transistor has a second fourteen gate, a twenty-fourth source, and a twenty-fourth a second drain of the twenty-fifth thin film transistor, a twenty-fifth source, and a twenty-fifth drain, the second fourteen gate and the first additional pull-down signal generating unit And the twenty-fifth gate is electrically connected, the twenty-fourth drain is respectively connected to the second eleventh source, the twenty-second source, one end of the additional capacitor, the twenty-third gate, and the second additional Output, second additional pull-down signal
- the second unit is electrically connected to the second additional pull-down unit, and the second fifteenth drain is electrically connected to the other end of the additional capacitor, the first additional output end, and the second additional pull-down unit, and the twenty-fifth source
- the pole is electrically connected to the low level input terminal;
- the second additional pull-down unit includes a twenty-sixth thin film transistor and a twenty-seventh thin film transistor, and the twenty-sixth thin film transistor has a twenty-sixth smear, a twenty-sixth source, and a second sixteen a drain, a twenty-seventh gate, a twenty-seventh source, and a twenty-seventh drain of the twenty-seventh thin film transistor, the second sixteenth drain and the second additional pull-down signal generating unit
- the twenty-seventh gate is electrically connected, and the twenty-sixth drain is respectively connected to the twenty-fourth source, the twenty-first source, the twenty-second source, one end of the additional capacitor, and the twentieth
- the third cabinet, the second additional output, and the second additional pull-down signal generating unit are electrically connected, wherein the twenty-seventh drain and the other end of the additional capacitor, the first additional output, and the twenty-fifth drain
- the twenty-third source is electrically connected, and the twenty-
- the twenty-fourth source is electrically connected to the low-level input terminal; the second sixteenth source is electrically connected to the low-level input terminal.
- the twenty-fourth source is respectively opposite to the other end of the twenty-fifth drain and the additional capacitor.
- the first additional output terminal and the second additional pull-down unit are electrically connected; the second sixteen source and the second seventeenth drain, the other end of the additional capacitor, the first additional output, and the twenty-fifth drain
- the pole and the twenty-third source are electrically connected.
- the first additional pull-down signal generating unit includes a twenty-eighth thin film transistor, a twenty-ninth thin film transistor, a thirtieth thin film transistor, and a thirty-first thin film transistor, and the second twenty-eighth thin film transistor has a first a twenty-eighth-pole, a twenty-eighth source, and a twenty-eighth drain, the first one twenty-nineth thin film transistor having a second nineteenth gate, a twenty-ninth source, and a second Nineteen drains, said one by one; "" ""-
- the thirty-th thin film transistor has a thirtieth gate, a thirtieth source, and a thirtieth drain
- the thirty-first thin film transistor has a thirty-first gate, a thirty-first source, and a third a thirty-first drain
- the second eighteenth gate, the twenty-eighth drain, the twenty-ninth drain, and the thirtieth gate are electrically connected to the second input end of the low frequency clock signal
- the twenty-eightth source is electrically connected to the twenty-ninth source, the thirtieth drain, the twenty-fourth gate, and the twenty-fifth gate, respectively
- the thirtieth source is
- the 31st drain is electrically connected, the 31st gate is respectively connected to the 21st source, the 22nd source, the end of the additional capacitor, the 23rd gate, and the second additional
- the output end, the twenty-sixth drain and the twenty-fourth drain are electrically connected, and the thirty-one source is electrically connected to
- the second additional pull-down signal generating unit includes a thirty-second thin film transistor, a thin film transistor, a thirty-fourth thin film transistor, and a thirty-fifth thin film transistor,
- the thin film transistor has a thirty-second cabinet, a thirty-second source, and a thirty-second drain.
- the thirteenth thin film transistor has a thirty-third gate, a thirty-third source, and a thirty-third drain
- the thirty-fourth thin film transistor has a thirty-fourth gate, a thirty-fourth source, and a third a thirty-fourth drain
- the thirty-fifth thin film transistor has a thirty-fifth gate, a thirty-fifth source, and a thirty-fifth drain
- the third, third, and fourth power gates are electrically connected to the first input end of the low frequency clock signal, and the thirty third source and the third power source are respectively
- the thirty-fourth drain, the twenty-sixth gate and the twenty-seventh gate are electrically connected
- the thirty-fourth source is electrically connected to the thirty-fifth drain, the thirtieth Five gates respectively and a third eleventh gate, a twenty-
- the twenty-ninth gate is electrically connected to the first input end of the low frequency clock signal; the thirteenth gate is electrically connected to the second input end of the low frequency clock signal.
- the twenty-ninth gate is electrically connected to the twenty-eighth source, the twenty-ninth source, the thirtieth drain, the twenty-fourth gate, and the twenty-fifth* pole
- the thirty-third* pole is respectively associated with the thirty-second source, the thirty-third source, the thirty-fourth drain, the twenty-sixth cabinet, the twenty-seventh shed Electrical connection.
- the present invention also provides a display panel having an integrated cabinet driving circuit, including a data driving circuit and a display panel body, the display panel body including the integrated gate driving circuit and the display panel pixel area, and the display panel pixel area includes A plurality of pixel units arranged in an array.
- the integrated gate driving circuit of the present invention and the display panel having the integrated *polar driving circuit adopt a double pull-down structure, so that the thin film transistor in the pull-down unit and the additional pull-down unit in the circuit can be in a bipolar voltage
- the biased working environment effectively suppresses the threshold voltage drift of the thin film transistor in the pull-down unit and the additional pull-down unit, which prolongs the working life of the circuit, so that the circuit can better meet the requirements of large and medium-sized display panels, and at the same time, the circuit structure Simple, low power consumption, also suitable for low temperature and high temperature operation.
- Figure i is a schematic structural view of an integrated gate driving circuit of the present invention
- 2A is a timing diagram of an integrated gate driving circuit of the present invention
- 2B is another timing diagram of the integrated drain driving circuit of the present invention.
- FIG. 3 is a structural diagram of a gate driving unit of an integrated gate driving circuit of the present invention.
- FIG. 4 is a structural diagram of an additional gate driving unit of the integrated gate driving circuit of the present invention.
- FIG. 5 is a circuit diagram of the first embodiment of the samarium-pole driving unit of the present invention.
- 6A is a timing diagram of a first embodiment of a gate driving unit of the present invention.
- 6B is another timing diagram of the first embodiment of the drain driving unit of the present invention.
- FIG. 7 is a test diagram of a threshold voltage drift of a thin film transistor in a pull-down unit
- FIG. 8 is a test diagram of an on-state current degradation of a thin film transistor in a pull-down unit
- Figure 9 is a circuit diagram of a second embodiment of the ⁇ -pole driving unit of the present invention.
- Figure 0 is a circuit diagram of a third embodiment of a gate driving unit of the present invention.
- FIG. 1 is a circuit diagram of a fourth implementation of the gate driving unit of the present invention.
- FIG. 12A is a timing diagram of a fourth embodiment of a drain driving unit of the present invention.
- 12B is another timing diagram of a fourth embodiment of the drain driving unit of the present invention.
- FIG. 13 is a circuit diagram of a fifth embodiment of a gate driving unit of the present invention.
- FIG. 4 is a circuit diagram of a sixth embodiment of a gate driving unit of the present invention.
- FIG. 15 is a circuit diagram of a first embodiment of a gate driving unit of the present invention.
- Figure 16 is a timing chart of the first embodiment of the additional tree-pole driving unit of the present invention.
- 17 is a circuit diagram of a second embodiment of an additional gate driving unit of the present invention.
- Figure 18 is a circuit diagram of a third embodiment of the gallium electrode driving unit of the present invention.
- Figure 9 is a circuit diagram of a fourth embodiment of an additional drain driving unit of the present invention.
- 20 is a schematic structural view of a display panel having an integrated cabinet driving circuit according to the present invention. detailed description
- the present invention provides an integrated shed-pole driving circuit including a cascaded multi-level gate driving unit and a multi-stage additional ⁇ driving unit, wherein
- the n-th gate driving unit has an n-th stage signal input terminal 21, an n+l-th stage signal input terminal 22, an n+3th stage signal input terminal 23, a high frequency clock signal first input terminal 24,
- the low frequency clock signal has a first input terminal 25 and a low frequency clock signal has a second input terminal 26.
- the m-th stage additional gate driving unit has an m-th stage additional signal input terminal 35, high Frequency clock signal first input terminal 24, high frequency clock signal second input terminal 34, low frequency clock signal first input terminal 25, low frequency clock signal second input terminal 26, low level input terminal 27, first additional output terminal 38 a second additional output 39;
- the nth stage signal input of the nth stage drain driving unit The terminal 2 is electrically connected to the first output terminal 28 of the n-2th gate driving unit; the n+1th signal input terminal 22 of the nth gate driving unit is electrically connected to the n+1th a second output terminal 29 of the stage drain driving unit; the n-th stage signal input terminal 23 of the nth stage gate driving unit is electrically connected to the first output terminal 28 of the n+3th stage gate driving unit The first output terminal 28 of the nth-level gate driving unit is electrically connected to the n-th stage signal input terminal 21 of the n+2th ⁇ -pole driving unit and the n-th level gate driving The n+3th stage signal input terminal 23 of the unit; the second output end 29 of the nth stage slab-pole drive unit is electrically connected to the n+1th stage signal input end of the n-th stage gate drive unit twenty two;
- the n-2th stage signal input end 21 of the nth stage drain driving unit is configured to input a pulse activation signal;
- the n+1th stage signal input end 22 of the 11th stage gate driving unit is electrically connected to the second output end 29 of the n+1th stage gate driving unit;
- the n+3 of the nth stage gate driving unit The first signal output terminal 23 is electrically connected to the first output terminal 28 of the rH-3th stage gate driving unit;
- the first output terminal 28 of the nth level* pole driving unit is electrically connected to the ri+2th level gate
- the n-2th stage signal input end 21 of the pole drive unit; the second output end 29 of the nth stage gate drive unit is suspended;
- the n-th stage signal input end 21 of the nth-stage ⁇ -pole driving unit is used to input a pulse activation signal;
- the first stage signal input end 22 of the nth stage gate driving unit is electrically connected to the second output end 29 of the n+ith stage gate driving unit; the n+3th stage of the nth stage gate driving unit
- the signal input terminal 23 is electrically connected to the first output terminal 28 of the n+3th stage gate driving unit; the first output terminal 28 of the nth stage gate driving unit is electrically connected to the ri+2 level.
- the nth stage signal input terminal 21 of the gate driving unit; the second output end 29 of the nth stage drain driving unit is electrically connected to the n+1th stage signal of the n-1th stage gate driving unit Input terminal 22;
- the nth stage gate driving unit is a third stage gate driving unit
- the nth to 2th stage signal input end 21 of the nth stage gate driving unit is electrically connected to the nth to 2nd stage gate
- the first output end 28 of the driving unit; the n+1th stage signal input end 22 of the third stage driving unit is electrically connected to the second output end 29 of the n+1th stage driving unit;
- the n+3th stage signal input end 23 of the nth stage gate driving unit is electrically connected to the first output end 28 of the nth thirteenth ⁇ -pole driving unit; the nth stage gate driving unit
- the first output terminal 28 is electrically connected to the n+2th gate
- the n-th stage signal input end 21 of the pole drive unit; the second output end 29 of the nth stage gate drive unit is electrically connected to the rH i level signal input end of the n-th stage cabinet drive unit twenty two;
- the n-th stage signal input end 21 of the nth-stage gate driving unit is electrically connected to the n-th level dipole a first output end 28 of the driving unit;
- the n+1th stage signal input end 22 of the nth stage gate driving unit is electrically connected to the second output end 29 of the n+1th stage driving unit;
- the n-th stage signal input terminal 23 of the nth stage gate driving unit is electrically connected to the first additional output terminal 38 of the first stage additional drain driving unit;
- the output terminal 28 is electrically connected to the ⁇ -2 stage signal input end 21 of the ⁇ +2 stage gate drive unit and the ⁇ +3 stage signal input end 23 of the ⁇ -3 stage gate drive unit, respectively;
- the second output end 29 of the nth stage gate driving unit is electrically connected to the n+1th stage signal input end 22 of the nth-stage gate driving unit;
- the ⁇ -2 stage signal input end 21 of the nth stage drain driving unit is electrically connected to the ⁇ -2 stage a first output terminal 28 of the tree drive unit;
- the n+1th stage signal input end 22 of the nth stage gate drive unit is electrically connected to the second output end 29 of the n+1th stage gate drive unit;
- the 11th to 3rd stage signal input terminal 23 of the nth stage gate driving unit is electrically connected to the first additional output terminal 38 of the second stage additional zeta electrode driving unit;
- the first output terminal 28 is electrically connected to the n+3th stage signal input terminal 23 of the n-3th stage gate driving unit;
- the second output end 29 of the nth stage gate driving unit is electrically connected to the 11th -n-level signal input terminal 22 of the 1-level pole drive unit;
- the nth stage gate driving unit is the reciprocal first stage porch-pole driving unit
- the 1st-stage signal input end 21 of the n-th stage porch-pole driving unit is electrically connected to the n-2 a first output terminal 28 of the stage gate driving unit
- the n+1th stage signal input terminal 22 of the nth stage gate driving unit is electrically connected to the second additional output terminal 39 of the first stage additional gate driving unit
- the 11th to 3rd stage signal input terminal 23 of the nth stage gate driving unit is electrically connected to the first additional output terminal 38 of the third stage additional cabinet driving unit
- the first output end 28 of the unit is respectively electrically connected to the n+3th signal input end 23 of the nth stage gate drive unit and the mth to the i th stage add signal input end 35 of the first stage additional pedestal 'pole drive unit
- the second output terminal 29 of the nth stage gate driving unit is electrically connected to the ⁇ stage signal input terminal 22 of the n-1th stage gate
- the m-th stage additional gate driving unit is any additional gate driving unit of the fourth stage to the last-numbered first-stage plus gate driving unit
- the m-th of the m-th stage additional pole driving unit The level additional signal input terminal 35 is electrically connected to the first additional output terminal 38 of the m-th stage additional ⁇ -pole driving unit, and the first additional output terminal 38 of the m-th stage additional gate driving unit is electrically connected Up to the m-1th stage additional signal input terminal 35 of the m+1th stage additional gate driving unit, the second summing output terminal 39 is suspended;
- the m-th stage additional signal input end 35 of the m-th stage additional pole driving unit is electrically connected to the reciprocal a first output terminal 28 of the first stage gate driving unit, a first additional output terminal 38 of the mth stage additional gate driving unit and a mth level addition of the first level additional gate driving unit
- the signal input terminal 35 and the n+3th stage signal input terminal 23 of the third-order ⁇ -terminal driving unit are electrically connected, and the second additional output terminal 39 is electrically connected to the reciprocal first-stage gate driving unit.
- the m-th stage additional signal input terminal 35 of the m-th stage additional ⁇ -pole driving unit is electrically connected to the The first additional output 38 of the m- 1 stage plus the gate driving unit, the first additional output 38 of the m-th stage additional gate driving unit and the m+1th additional gate driving unit respectively
- the m+th stage additional signal input terminal 35 and the n+3th stage signal input terminal 23 of the penultimate stage* pole drive unit are electrically connected, and the second additional output terminal 39 is suspended;
- the m-th stage-stage sing-in signal input terminal 35 of the m-th stage additional singal driving unit is electrically connected to a first additional output 38 of the m-th stage additional gate driving unit, the first additional output 38 of the m-th stage additional gate driving unit and the m+1th additional gate driving unit
- the m+th stage additional signal input terminal 35 and the n+3th stage signal input terminal 23 of the last stage gate drive unit are electrically connected, and the second additional output terminal 39 is suspended;
- the second stage gate driving unit of the integrated gate driving circuit further includes:
- the driving unit 42 is electrically connected to the nth level 2 signal input end 21, the high frequency clock signal 'number first input end 24, the nth third level signal input end 23, the first output end 28 and the second output end 29, respectively. ;
- the pull-down unit 44 is electrically connected to the n+1th stage signal input terminal 22, the low frequency clock signal first input terminal 25, the low frequency clock signal second input terminal 26, the low level input terminal 27 and the driving unit 42 respectively.
- the mth stage plus the cabinet driving unit of the integrated gate driving circuit further includes:
- An additional driving unit 52 respectively, and an m-i-stage additional signal input terminal 31, a high-frequency clock signal first input terminal 24, a high-frequency clock signal second input terminal 25, a first additional output terminal 38, and a second additional output terminal 39 electrical connection;
- the additional pull-down unit 54 is electrically connected to the low frequency clock signal first input terminal 25, the low frequency clock signal second input terminal 26, the low level input terminal 27 and the additional driving unit 52, respectively.
- the low The input signal of the level input terminal 27 is a low level signal V ss ;
- the input signal of the first input terminal 24 of the high frequency clock signal and the second input end 34 of the high frequency clock signal is the first high frequency clock signal C, two high frequency clock signal C, the third high-frequency clock signal CK 3 or the fourth high frequency clock signal CK 4, the first high frequency clock signal C to the third high frequency clock signal CK 2 opposite in phase to the second
- the high frequency clock signal CK 2 is opposite in phase to the fourth high frequency clock signal, and the first high frequency clock signal and the third high frequency clock signal are the same as the second high frequency clock signal and the fourth high frequency clock signal waveform but The initial phase is different (as shown in FIG.
- the input signals of the first input terminal 24 of the high frequency clock signal of the 11+2 stage, 11+3 stage gate drive unit are the second, third and fourth high frequency clock signals respectively; when the mth of the integrated gate drive circuit
- the integrated gate drive circuit When the first input terminal 24 of the high frequency clock signal of the polar drive unit and the input signal of the second input terminal 34 of the high frequency clock signal are the kth and k-1th clock signals, respectively, the integrated gate drive circuit
- the input signal of the first input terminal 24 of the high frequency clock signal of the in+1th stage additional gate driving unit and the second input terminal 34 of the high frequency clock signal are respectively the k+1th and kth:th clock signals, the k The value is 1 to 4, the k-1 value is 4 when k is, and the k+1 value is 1 when k is 4.
- the input signal of the low frequency clock signal first input terminal 25 and the low frequency clock signal second input terminal 26 is a first low frequency clock signal ECK or a second low frequency clock signal EXCK, the first low frequency clock signal and the second low frequency clock signal
- the voltage is reversed, that is, when the first low frequency clock signal is a high potential signal, the second low frequency clock signal is a low potential signal, and when the first low frequency clock signal is a low potential signal, the second low frequency clock signal is a high potential signal;
- the input signal of the low frequency clock signal of the nth stage gate driving unit of the integrated gate driving circuit and the second input terminal 26 of the low frequency clock signal is the first low frequency clock signal and the second low frequency clock signal respectively
- the input signal of the first input terminal 25 of the low-frequency clock signal of the n+1th-level drain driving unit and the second input terminal 26 of the low-frequency clock signal are respectively a second low-frequency clock signal and a first low-frequency clock signal; a low frequency clock signal of the mth stage additional gate driving
- FIG. 5 to FIG. 8 are the first embodiment of the gate driving unit of the present invention, and refer to FIG. 1 to FIG. 3 in combination.
- the driving unit 42 includes a capacitor C bi , a first thin film transistor ⁇ , a second thin film transistor ⁇ 2 and a third thin film transistor ⁇ 3 , the first thin film transistor T1 has a first gate, a first a source and a first drain, the second thin film transistor T2 has a second gate, a second source; a second drain, the third thin film transistor T3 has a third drain and a third source And the third drain, the first gate and the first drain are electrically connected to the n-th stage signal input end, and the first source is respectively connected to one end and the second gate of the capacitor C bl
- the second drain, the second output terminal 29 and the pull-down unit 44 are electrically connected, the second drain is electrically connected to the first input end 24 of the high-frequency clock signal, and the second source and the capacitor C bi The other end, the first output terminal 28 and the pull-down unit 44 are electrically connected, the third gate is electrically connected to the n-th level signal input terminal 23, and the third source and the low
- the pull down unit 44 includes a first pull down unit 45.
- the first pull-down signal generating unit 46 a second pull-down unit 47 and a second pull-down signal generating unit 48; wherein the first pull-down unit 45 and the driving unit 42, the first pull-down signal generating unit 46, the second pull-down unit 47, and the low-level input terminal
- the first pull-down signal generating unit 46 is electrically connected to the first pull-down unit 45, the low-frequency clock signal first input terminal 25, the low-frequency clock signal second input terminal 26, and the ⁇ level input terminal 27, respectively.
- the second pull-down unit 47 is electrically connected to the driving unit 42, the second pull-down signal generating unit 48, the first pull-down unit 45, and the low-level input terminal 27, and the second pull-down signal generating unit 48 is connected.
- the second pull-down unit 47, the low frequency clock signal first input terminal 25, the low frequency clock signal second input terminal 26 and the low level input terminal 27 are electrically connected to each other;
- the first pull-down unit 45 includes a fourth thin film transistor T4 and a fifth thin film transistor T5, and the fourth thin film transistor T4 has a fourth gate, a fourth source, and a fourth drain, and the fifth thin film transistor
- the fifth gate, the fifth source, and the fifth drain are electrically connected to the first pull-down signal generating unit 46, and the fourth The drain is electrically connected to the first source, the capacitor (the end of the second gate, the second gate, the third drain, the second output 29, the second pull-down signal generating unit 48, and the second pull-down unit 47, a fourth source, a fifth source electrically connected to the low level input terminal 27, the fifth drain and the second source, the other end of the capacitor, the first output end 28 and the second pull down Unit 47 is electrically connected;
- the second pull-down unit 47 includes a sixth thin film transistor ⁇ 6 and a seventh thin film transistor ⁇ 7, and the sixth thin film transistor ⁇ 6 has a sixth porphyrium, a sixth source, and a sixth drain, and the seventh thin film transistor a seventh gate, a seventh source, and a seventh drain, wherein the sixth gate and the seventh cabinet are electrically connected to the second pull-down signal generating unit 48, and the The sixth source and the seventh source are electrically connected to the low level input terminal 27; the sixth drain is respectively connected to the first source, the end of the capacitor, the second gate, the third drain, and the The fourth drain, the second output terminal 29 and the second pull-down signal generating unit 48 are electrically connected, and the seventh source is electrically connected to the second source, the other end of the capacitor, the first output terminal 28 and the fifth drain Sexual connection
- the first pull-down signal generating unit 46 includes an eighth thin film transistor ⁇ 8 and a ninth thin film crystal
- the ninth thin film transistor T9 has a ninth pole, a ninth source and a ninth drain, and the ninth pole is electrically connected to the first input terminal 25 of the low frequency clock signal, and the tenth thin film transistor ⁇ 0
- the tenth, tenth, and tenth drains, the eleventh thin film transistor T1 has an eleventh gate, an eleventh source, and an eleventh drain, and the twelfth thin film transistor T12 The twelfth gate.
- the input terminal 26 has the eighth source and the ninth source and the tenth drain, respectively.
- the fourth gate and the fifth gate are electrically connected, and the tenth source is electrically connected to the eleventh drain and the twelfth drain, respectively, and the eleven gates are respectively connected to the first
- the source, the capacitor c bi , the second gate, the third drain, the fourth drain, the sixth drain, and the second output 29 are electrically connected, the eleventh source and the twelfth source Connected to the low-level input terminal 27, the twelfth* pole and the 11th-level signal input terminal are electrically connected
- the second pull-down signal generating unit 48 includes a fourteenth thin film transistor T14, a fifteenth thin film transistor ⁇ 5 , a sixteenth thin film transistor ⁇ 6, a seventeenth thin film transistor T17, and an eighteenth thin film transistor T18,
- the fourteenth thin film transistor ⁇ 4 has a fourteenth gate, a fourteenth source, and a fourteenth drain
- the fifteenth thin film transistor T15 has a fifteenth drain, a fifteenth source, and a fifteenth drain
- the sixteenth thin film transistor T16 has a sixteenth gate, a sixteenth source, and a sixteenth drain
- the seventeenth thin film transistor T17 has a seventeenth cabinet, a seventeenth source, and a seventeenth drain
- the eighteenth thin film transistor ⁇ 8 has an eighteenth smear, an eighteenth source, and an eighteenth drain
- the fourteenth gate, the fourteenth drain The fifteenth drain and the sixteenth gate are electrically connected to the first input terminal 25 of the low frequency
- the high/low voltage of the input signal CKA of the first input terminal 24 of the high frequency clock signal is V ffl /V L i , respectively, and the first and second low frequency clock signals ECK and EXCK are complementary, and their high/low voltage
- the magnitude of the voltage is Vffi/Vu
- the signal input by the low-level input terminal 27 is a low-level input signal V SS whose voltage is VL, where V m ⁇ V H2 , V L > V L1 > VL2O
- the input signal CKA of the first input terminal 24 of the high frequency clock signal is any one of the first high frequency clock signal CK, the second high frequency clock signal CK 2 , the third high frequency clock signal CK 3 or the fourth high frequency clock signal CK4 Clock signal.
- the signal CK A input by the first input terminal 24 of the high-frequency clock signal is taken as an example of the first high-frequency clock signal C ⁇ ⁇ , when the voltage of the first low-frequency clock signal EC ⁇ is V H2 , and the second low-frequency clock signal
- the working process of the gate driving unit is as follows:
- CKi voltage becomes V u
- V G ⁇ is the voltage V m.
- the first thin film transistor Ti is turned on, and the signal V G(n charges Q to V m - V Tm , where V TH1 is the threshold voltage of the first thin film transistor ⁇ .
- the second thin film transistor ⁇ 2 is turned on, V Gin)
- the voltage drop is u; meanwhile, the fourteenth, sixteenth, and seventeenth thin film transistors ⁇ 14, ⁇ 16, and ⁇ 7 are turned on, pulling the potential of ⁇ to a low level, and the sixth and seventh thin film transistors ⁇ 6, 1 are turned off.
- V Gtn _ 2 the potential of V Gtn _ 2 ) drops to a low level, the voltage of ⁇ 3 ⁇ 4 rises from ⁇ to V H1 , and the signal output terminal is charged by the turned-on second thin film transistor T2, and the voltage of V G(n ) rises.
- V Hi the voltage of V ffl V Tm due to the function of the capacitor bootstrap, which increases the charging capability of the second thin film transistor T2 and accelerates the V The rising process of GW .
- V G(n _ 3 ) rises to a high level, and the third thin film transistor T3 is turned on and the voltage of ( ⁇ ) is pulled down until the seventeenth thin film transistor T17 is turned off. Since ( 3 ⁇ 4 Clean + ⁇ ) is normally high, the eighteenth thin film transistor T18 is still turned on, and the potential of the pull-down 1%) is low.
- the gate driving unit After the high-level pulse output of the V GW , the gate driving unit is in the non-strobe state, and the voltage of the V GW needs to be maintained at V L to prevent the switching thin film transistor in the pixel connected to the signal output terminal from being turned on, resulting in a signal.
- Write error Theoretically, the potential of ⁇ ( ⁇ and ( ⁇ ) should be kept low, but due to the parasitic capacitance between the source and the drain of the second thin film transistor T2, when the clock 03 ⁇ 4 transitions from a low level to a high level , a coupling voltage A VQ will be generated at the Q terminal. ⁇ ⁇ ( ; ⁇ may cause 03 ⁇ 4 to incorrectly charge the signal output, so that the potential of V G(n) cannot be kept low. Level Therefore, a dedicated pull-down unit must be set to maintain the potential of V G low.
- the thin film transistors T6 and ⁇ 7 are forward biased, and the thin film transistors ⁇ 4 and ⁇ 5 are negatively biased; at time ⁇ .5, Q( n+i ) falls to a low level, and the eighteenth thin film transistor T18 is turned off.
- the ECK charges 13 ⁇ 4 through the fourteenth thin film transistor T1 4 , and the voltage at the P w terminal rises so that the sixth and seventh thin film transistors T6 and ⁇ 7 are turned on, and the voltages of the ⁇ and ⁇ are maintained at V L ; the sixth and seventh thin film transistors T6 ⁇ 7 is in a forward bias state (V GS :>0 ), and the magnitude of the forward bias voltage is V+ «V H2 - for the fourth thin film transistor T4 and the fifth thin film transistor T5, due to the ninth thin film transistor T9 Turn on, ! The voltage at the ⁇ terminal is maintained at Vu.
- Vg S ⁇ () negative bias
- ⁇ _- ⁇ 2 A schematic diagram of V+ and V- is shown in Fig. 5B. It should be noted that although the voltage Vu at the K( N) terminal is less than the voltage V L of V ss , since the tenth thin film transistor T10 is turned off, V ss is prevented from flowing through the eleventh and twelfth thin film transistors T1 l, ⁇ 2. The reverse charging current of K w , therefore, the voltage at the terminal 1 can be maintained at V L2 , so that the fourth thin film transistor T4 and the fifth thin film transistor T5 are in a negative bias.
- the thin film transistors T6 and ⁇ 7 are negatively biased, and the thin film transistors ⁇ 4 and ⁇ 5 are forward biased similarly.
- the voltage of the low frequency clock EXCK is V H2 and the voltage of the ECK is V L2 ; after the time t5, K w is high, so that the fourth and fifth thin film transistors T4, ⁇ 5 are forward biased, and the Q (n) and V G(n ) voltages are maintained at V L .
- the fifteenth thin film transistor T15 is turned on, and at the same time, because the sixteenth thin film transistor T1 6 is turned off, the reverse charging current of V ss flowing to the P w through the seventeenth and eighteenth thin film transistors T17 and T18 is prevented, therefore, the fifteenth The thin film transistor T15 is capable of pulling P (n ) down to 1 ⁇ 4 so that the sixth and seventh thin film transistors T6, ⁇ 7 are in a negative bias state.
- the integrated gate driving circuit adopts a double pull-down structure.
- ECK is high level
- the first pull-down unit 45 is in a negative bias state
- the second pull-down unit 47 is used to pull down V G(n) and (3 ⁇ 4 n voltage.)
- EXCK is high
- the first pull-down unit 45 is used to pull down the voltages of V G and Q w
- the second pull-down unit 47 is in a negative bias state. Therefore, throughout the working process.
- the thin film transistors in each pull-down unit can be under positive and negative bipolar voltage bias, according to the results of the thin film transistor electrical stress test in the pull-down unit.
- the threshold voltage drift of the pull-down thin film transistor can be effectively suppressed, extending the operating life of the integrated gate drive circuit.
- Figure 7 shows the DC voltage (25 V), unipolar pulse voltage (25V ⁇ 0V), bipolar pulse voltage (25V ⁇ 10V) threshold voltage drift curve of thin film transistor in pull-down unit under three stress conditions
- Figure 8 shows DC voltage (25V), unipolar pulse voltage (25V ⁇ 0V), bipolar pulse voltage (25V ⁇ 10V)
- the degradation rate curve of the on-state current of the thin film transistor in the three stress condition pull-down units can be seen from the test compared with the conventional DC voltage unipolar pulse voltage ,
- the threshold voltage drift of the thin film transistor in the pull-down unit at the silent polarity pulse voltage is significantly improved, and the degradation of the on-state current is also weakened.
- FIG. 9 is a second embodiment of the cabinet driving unit of the present invention.
- the embodiment is basically the same as the first embodiment, and the difference is: in this embodiment, The ninth ⁇ -pole of the ninth thin film transistor T9 in the first pull-down signal generating unit 46 and the eighth source, the ninth source tenth drain, the fourth gate, and the fifth gate, respectively Electrical connection; the fifteenth drain of the fifteenth thin film transistor T15 in the second pull-down signal generating unit 48 and the fourteenth source, the fifteenth source, the sixteenth drain
- the sixth grid and the seventh cabinet are electrically connected.
- the ninth thin film transistor T9 and the fifteenth thin film transistor T15 can still perform the pull-down ⁇ ⁇ ⁇ ) and ?
- the voltage ofenfin acts, and such a connection can reduce the load of the low-frequency clock input ECK/EXCK., which helps to reduce the power consumption of the circuit.
- the circuit working process of this embodiment is basically the same as the first embodiment of the cabinet driving unit, and therefore will not be described again.
- FIG. 10 is a third embodiment of the cabinet driving unit of the present invention.
- the pull signal generating unit 46 further includes a thirteenth thin film transistor T13 having a thirteenth gate, a thirteenth source, and a thirteenth drain, the thirteenth cabinet Electrically connecting to the first gate, the first drain, and the n-th level signal input end 21, respectively, the thirteenth drain and the tenth source, the eleventh drain pole.
- the twelfth drain is electrically connected; the thirteenth source is electrically connected to the low level input terminal 27; the second pulldown signal generating unit 48 further includes a nineteenth thin film transistor T9, the nineteenth The thin film transistor ⁇ 9 has a nineteenth source and a nineteenth drain of the nineteenth cabinet, and the nineteenth gate and the thirteenth gate, the first cabinet, the first drain, and the The ⁇ - 2 signal input terminal 21 is electrically connected, and the 19th drain is electrically connected to the 16th source, the 17th drain, and the 18th drain respectively; The nineteenth source is electrically connected to the low level input terminal 27.
- Such a connection can enhance the ability of the tl ⁇ t2 phase to ⁇ ⁇ ) or P w terminal pull-down, making the circuit more suitable for low temperature operation. The reasons are as follows:
- the threshold voltage of the thin film transistor in the circuit increases, and the mobility decreases, so that the conductivity of the transistor is weakened.
- ECK is at a high level and EXCK is at a low level, refer to FIG. 5, FIG. 6A and FIG. 10; in the ti ⁇ t2 phase of the circuit operation, ⁇ 2) rises to a high level, and passes through the thin film transistor.
- T1 charges ⁇ 3 ⁇ 4 ⁇ ) , the voltage rise of Q turns on the thin film transistor T17, so that the voltage at the P(ri) terminal is pulled down and the thin film transistor ⁇ 6 is turned off, and the charge at the Q w terminal does not leak through the thin film transistor T6, which in turn Promotes (3 ⁇ 4 radical) charging, which is a positive feedback process; however, in low temperature environments, the thin film transistor T1's conductivity is weakened, As a result, the charging speed of (3 ⁇ 4 n ) is weakened, and the ability of the thin film transistor T17 to pull down the voltage at the P( n ) terminal is weakened, so that the thin film transistor T6 cannot be turned off well, and the leakage of the thin film transistor T6 causes the charging failure of ( ⁇ ).
- V G ⁇ 2 can directly pull down the 1%) terminal through the thin film transistor ⁇ 9, which can better suppress the leakage of the thin film transistor T6; when the EXCK is high level, ECK When it is low, increasing the thin film transistor T13 can better suppress the leakage of the thin film transistor T4. Therefore, the gate driving unit of the present embodiment is suitable for low temperature operation.
- the J ⁇ -level gate driving unit 3 ⁇ 4 has an n-th stage signal input terminal 32 and a third output terminal 33, when the first!
- the n-1th stage signal input end 32 of the nth stage gate driving unit is electrically connected to a third output terminal 33 of the n-th stage gate driving unit;
- the second-level gate driving unit is the first-stage gate driving unit, the nth-level bridge driving unit does not have the nth a stage signal input terminal 32;
- the nth stage gate driving unit is any one of the first stage to the penultimate stage gate driving unit, the third stage of the nth stage gate driving unit
- the output terminal 33 is electrically connected to the nth-stage signal input terminal 32 of the n+1th-level gate driving unit; when the n-th gate driving unit is the last-numbered gate driving unit, The third output end 33 of the second-stage gate driving unit is suspended;
- the pull-down unit 44 includes a first pull-down unit 45, a second pull-down unit 47, and a second pull-down signal generating unit 48, wherein the first pull-down unit 45' and the driving unit 42 and the nth are respectively - a 1-stage signal input terminal 32 and a low-level input terminal 27 are electrically connected, and the second pull-down unit 47' is respectively coupled to the driving unit 42, the second pull-down signal generating unit 48, the first pull-down unit 45', and the low level
- the input terminal 27 is electrically connected, and the second pull-down signal generating unit 48' is respectively connected to the driving unit 42, the second pull-down unit 47', the low frequency clock signal first input terminal 25, the low frequency clock signal second input terminal 26, and the low battery
- the flat input terminal 27 is electrically connected;
- the first pull-down unit 45 includes a fourth thin film transistor T4 and a fifth thin film transistor T5, and the fourth thin film transistor T4 has a fourth gate, a fourth source, and a fourth drain, and the fifth film
- the transistor T5 has a fifth* pole, a fifth source, and a fifth drain, and the fourth drain and the fifth gate are electrically connected to the 1-1st stage signal input end 32, wherein the The four drains are respectively electrically connected to the first source, the end of the capacitor, the second gate, the third drain, the second output 29, the second pull-down signal generating unit 48, and the second pull-down unit 47.
- the fourth source and the fifth source are electrically connected to the low level input terminal 27, and the fifth drain and the second source and the capacitor Cw are respectively The other end, the first output terminal 28 and the second pull-down unit 47' are electrically connected;
- the second pull-down unit 46 includes a sixth thin film transistor T6 and a seventh thin film transistor T7, and the sixth thin film transistor T6 has a a sixth gate, a sixth source, and a sixth drain, wherein the seventh thin film transistors T, 7 have a seventh gate, a seventh source, and a seventh drain, the sixth gate and the second
- the pull-down signal generating unit 48, the seventh bridge, and the third output 33 are electrically connected, and the sixth drain is respectively connected to the first source, the end of the capacitor C bi , the second gate, the third drain, and the first
- the fourth drain, the second output terminal 29 and the second pull-down signal generating unit 48 are electrically connected, and the sixth source and the seventh source are electrically connected to the low-level input terminal 27, and the seventh drain
- the second pull-down signal generating unit 48 includes a fourteenth thin film transistor T14, a fifteenth thin film transistor ⁇ 5, a sixteenth thin film transistor ⁇ 6, a seventeenth thin film transistor T18, and an eighteenth thin film transistor T18,
- the fourteenth thin film transistor Ti4 has a fourteenth gate, a fourteenth source and a fourteenth drain
- the fifteenth thin film transistor T15 has a fifteenth drain, a fifteenth source, and a fifteenth drain
- the sixteenth thin film transistor T16 has a sixteenth gate, a sixteenth source, and a tenth drain
- the seventeenth thin film transistor has a seventeenth gate, a seventeenth source, and a seventeenth drain
- the eighteenth thin film transistor ⁇ 8 has an eighteenth gate, an eighteenth source, and an eighteenth drain
- the five drains and the sixteenth gates are electrically connected to the first input terminal 25 of the low frequency clock
- the gate driving unit adopts a double pull-down sharing structure, that is, a pull-down signal generating unit is shared by the adjacent two-stage gate driving units.
- the single-stage gate driving unit omits a first pull-down signal generating unit, and the number of transistors of the single-stage porch-pole driving unit is reduced, and the circuit structure is simplified.
- T6/T7 tube, T4/T5 tube under positive and negative bipolar voltage bias its threshold voltage drifts JH Effective suppression.
- FIG. 13 is a fifth embodiment of the cabinet driving unit of the present invention.
- the embodiment is basically the same as the fourth embodiment, and the difference is:
- the fifteenth gate of the fifteenth thin film transistor T15 in the second pull-down signal generating unit 48' is respectively connected to the fourteenth source, the fifteenth source, The sixteenth drain, the sixth gate, the seventh gate, and the third output terminal 33 are electrically connected. This connection reduces the load on the clock EC /EXCK and helps reduce circuit power consumption.
- circuit operation process of this embodiment is substantially the same as that of the fourth embodiment of the gate driving unit, and therefore will not be described again.
- FIG. 14 is a sixth embodiment of the gate driving unit of the present invention.
- the second pull-down signal generating unit 48 of the embodiment further includes a nineteenth thin film transistor T19 having a nineteenth gate, a nineteenth source, and a nineteenth drain.
- the nineteenth cabinet electrode is electrically connected to the first * pole, the first drain, and the n-th grade signal input end 21, respectively, and the nineteenth drain and the tenth
- the sixteenth source, the seventeenth drain and the eighteenth drain are electrically connected; the nineteenth drain is electrically connected to the low level input terminal 27.
- Such a connection can enhance the tl ⁇ t2 phase, right? ⁇ The ability to pull down the voltage to make the circuit more suitable. The reasons are as follows:
- the threshold voltage of the thin film transistor in the circuit increases, and the mobility decreases, so that the conductivity of the transistor is weakened.
- ECK is at a high level and EXCK is at a low level
- V G ⁇ 2 rises to a high level.
- Level, and charge Q through the thin film transistor TI the voltage rise of Q w turns on the thin film transistor T17, so that the voltage of the P(n) terminal is pulled down to turn off the thin film transistor T6, and the charge of the Q (n ) terminal does not pass.
- the gate driving unit of the embodiment is suitable for low temperature operation.
- circuit working process of this embodiment is basically the same as the fourth embodiment of the cabinet driving unit, and therefore will not be described again.
- the additional driving unit 52 includes an additional capacitor C b2 , a twenty-first thin film transistor T21, a twenty-second thin film transistor T22, and a twenty-third thin film transistor T23, wherein the twenty-first thin film transistor T21 has a second eleventh gate, a twenty-first source, and a second a twenty-first drain, the twenty-second thin film transistor ⁇ 22 has a second twelve-gate, a twenty-second source, and a twenty-second drain, and the twenty-third thin film transistor ⁇ 23 has a twentieth a third gate, a twenty-third source, and a twenty-third drain, wherein the second eleven gate, the twenty-first drain, and the twenty-second drain are electrically connected to the mth
- the additional pull-down unit 54 includes a first additional pull-down unit 55, a first additional pull-down signal generating unit 56, a second additional pull-down unit 57, and a second additional pull-down signal generating unit 58; wherein the first additional pull-down unit 55
- the first additional pull-down signal generating unit 56 and the first additional pull-down signal generating unit 56 are electrically connected to the first additional pull-down signal generating unit 56 and the first additional pull-down signal generating unit 56, respectively.
- the low frequency clock signal first input terminal 25, the low frequency clock signal second input terminal 26 and the low level input terminal 27 are electrically connected, and the second additional pulldown unit 57 is respectively coupled to the additional driving unit 52 and the second additional pulldown signal generating unit.
- the first additional pull-down unit 55 and the low-level input terminal 27 are electrically connected, the second additional pull-down signal generating unit 58 and the second additional pull-down unit 57, the low-frequency clock signal first input terminal 25, and the low-frequency clock signal.
- the second input terminal 26 and the low level input terminal 27 are electrically connected;
- the first additional pull-down unit 55 includes a twenty-fourth thin film transistor T24 and a twenty-fifth a film transistor T25, the twenty-fourth thin film transistor T24 has a second fourteenth gate, a twenty-fourth source and a twenty-fourth drain, and the twenty-fifth thin film transistor T25 has a twenty-fifth gate, a twenty-fifth source and a twenty-fifth drain, wherein the twenty-fourth gate is electrically connected to the first additional pull-down signal generating unit 56 and the twenty-fifth pole, the twenty-fourth a drain and a second eleventh source, a twenty-second source, an end of the additional capacitor
- the second additional pull-down unit 56 includes a second sixteen thin film transistor T26 and a twenty-seventh thin film transistor T27, and the second sixteen thin film transistor T26 has a twenty-sixth bridge, a twenty-sixth source, and a second Twenty-sixth drain, the twenty-seventh thin film transistor T27 twenty-seventh gate, the first a twenty-seventh source and a twenty-seventh drain, wherein the second sixteenth gate is electrically connected to the second additional pull-down signal generating unit 58 and the twenty-seventh pole, the second sixteen source
- the poles are electrically connected to the low-level input terminal 27; the second sixteen drains are respectively connected to the second fourteenth source, the twenty-first source, the twenty-second source, and one end of the additional capacitor C b2
- the twenty-third gate, the second additional output 39 and the second additional pull-down signal generating unit 58 are electrically connected, and the twenty-seventh drain and the other end of the additional capacitor C b2 are
- the first additional pull-down signal generating unit 56 includes a twenty-eighth thin film transistor T28, a twenty-ninth thin film transistor ⁇ 29, a thirtieth thin film transistor ⁇ 30, and a thirty-first thin film transistor T31, and the twenty-eighth thin film transistor
- the ⁇ 28 has a twenty-eighth gate, a twenty-eighth source, and a twenty-eighth drain
- the twenty-ninth thin film transistor ⁇ 29 has a second nineteenth gate, a twenty-ninth source, and a twentieth a thirteenth thin film transistor ⁇ 30 having a thirtieth gate, a thirtieth source, and a thirtieth drain
- the thirty-first thin film transistor T31 has a third eleventh gate and a third An eleventh source and a thirty-first drain, wherein the second eighteenth gate, the twenty eightth drain, the twenty nineth drain, and the thirtieth gate are electrically connected to the low frequency clock signal a second input
- the second additional pull-down signal generating unit 58 includes a thirty-second thin film transistor T32, a thirty-third thin film transistor ⁇ 33, a thirty-fourth thin film transistor ⁇ 34, and a thirty-fifth thin film transistor ⁇ 35, and the thirty-second film
- the transistor ⁇ 32 has a thirty-second gate, a thirty-second source, and a thirty-second drain
- the thirty-third thin film transistor ⁇ 33 has a thirteenth gate, a thirteenth source, and a third a thirteenth drain
- the thirty-fourth thin film transistor ⁇ 34 has a thirty-fourth gate, a thirty-fourth source, and a thirty-fourth drain
- the thirty-fifth thin film transistor ⁇ 35 has a thirty-fifth a gate, a thirty-fifth source, and a thirty-fifth drain
- the thirty-second gate, the thirty-second drain, the thirty-third source drain, and the thirty-fourth gate are all electrically Connected to the low frequency
- the thirty-fourth source is electrically connected to the thirty-fifth drain, and the thirty-fifth gate is respectively connected to the third eleventh gate, the twenty-first source, and the twenty-second source Adding one end of the capacitor C b2 , the twenty-third gate, the second output terminal 39 , The twenty-sixth drain and the twenty-fourth drain are electrically connected, and the thirty-fifth source is electrically connected to the low-level input terminal 27.
- the working process of the circuit of this embodiment is different from that of the first embodiment of the gate driving unit.
- the transistors ⁇ 21 and ⁇ 22 are simultaneously turned on for the Q DM(N ). Charging is performed; at time t4, transistor T22 is substituted for transistor D3 of the first embodiment of the gate driving unit to discharge Q DWN) ; after time t4, transistor T22 is controlled by a signal input by second signal terminal CKB of the clock signal, pull-down Q
- the voltage at the DM(N) terminal effectively suppresses the clock feedthrough effect of the circuit.
- This embodiment does not need to additionally provide the signal V G(N ⁇ 3 ), and does not need to provide the signal Q (N+ ;) additionally. Therefore, in the multi-stage cascade, the advantage of the gate driving unit of this embodiment is that it is not required
- the level unit provides a feedback signal.
- FIG. 7 which is a second embodiment of the additional gate driving unit of the present invention, and referring to FIG. 15 to FIG. 16 and FIG. 1 to FIG. 4, the embodiment is substantially the same as the first embodiment of the additional driving unit.
- the difference is: in this embodiment, the twentieth source of the twenty-fourth thin film transistor of the first additional pull-down unit 55 and the other end of the second fifteenth drain and the capacitor C b2 respectively
- the first additional output 38 and the second additional pull-down unit 57 are electrically connected; the second sixteen source of the second sixteen thin film transistor of the second additional pull-down unit 56 and the second seventeen respectively
- the other end of the drain and the additional capacitor C b2 , the first additional output 38 , the twenty-fifth drain and the twenty-third source are electrically connected.
- This connection helps to suppress leakage of the twenty-fourth thin film transistor and the twenty-sixth transistor at the high temperature in the t2 to t3 stage, making the circuit suitable for high temperature operation.
- the reasons are as follows:
- the threshold voltage of the thin film transistor in the circuit is reduced, and the mobility is increased, so that the conductivity of the transistor is enhanced.
- ECK at high, low level EXCK as an example, referring to FIG 15, FIG 16, FIG 17; t2 ⁇ t3 stage in the circuit, CK V DM is charged through the thin film transistor T23, V DM(n _t rises to a high level and boosts the voltage of Q DM(n ) by the bootstrap effect of the capacitor, which in turn accelerates the rise of V DM(:n) , which is a positive feedback
- the high conductivity of the transistor T26 at high temperature causes the Q DMW to leak through the transistor T26, thus destroying the above process, resulting in circuit failure.
- the twenty-sixth source is connected to V DMW , so that In the t2 ⁇ t3 phase of the circuit operation, the gate-source voltage of the thin film transistor T26 is negative, thus effectively suppressing the leakage of the thin film transistor T26; when the EXCK is high level and ECK is low level, the film The leakage of the transistor T24 can also be suppressed. Therefore, the additional gate driving unit of the present embodiment is suitable for high temperature operation.
- the circuit working process of this embodiment is basically the same as the first embodiment of the additional gate driving unit.
- FIG. 8 which is a third embodiment of the additional gate driving unit of the present invention, and with reference to FIG. 15 to FIG. 16 and FIG. 1 to FIG. 4, this embodiment is basically related to the first embodiment of the additional driving unit. The difference is that: in this embodiment, the second nineteenth cabinet of the first additional pull-down signal generating unit 56 and the twenty-eighth source, the second nineteen source, a thirty-drain, a twenty-fourth cabinet, and a twenty-fifth gate electrical connection; the second additional pull-down signal generating unit
- the thirty-third bridge of 58 is respectively associated with the thirty-second source, the thirty-third source, the thirty-fourth drain, the twenty-sixth gate, and the twenty-seventh gate electrical connection. This connection reduces the load on the low-frequency clock input ECK/EXCK and helps reduce circuit power consumption.
- circuit operation process of this embodiment is basically the same as that of the additional gate drive unit, and therefore will not be described again.
- FIG. 19 which is a fourth embodiment of an additional cabinet driving unit of the present invention, and in conjunction with FIG. 15 to FIG. 16 and FIG. 18 and FIG. 1 to FIG. 4, the third embodiment of the present embodiment and the additional driving unit are basically The same, the difference is: in this embodiment, the twenty-fourth source of the twenty-fourth thin film transistor of the first additional pull-down unit 55 and the second fifteenth drain, the capacitor C b2 The other end, the first additional output 38 and the second additional pull-down unit 57 are electrically connected; the second sixteen source of the second sixteen thin film transistor of the second additional pull-down unit 56 and the first The other end of the twenty-seventh drain, the additional capacitor C b2 , the first additional output 38 , the twenty-fifth drain and the twenty-third source are electrically connected.
- This connection helps to suppress leakage of the twenty-fourth thin film transistor and the twenty-sixth transistor in the bootstrap phase at high temperatures, making the circuit suitable for high temperature operation.
- circuit operation process of this embodiment is substantially the same as that of the first embodiment of the additional gate driving unit, and therefore will not be described again.
- the present invention provides a display panel having an integrated gate driving circuit, which may be a liquid crystal display panel or an OLED display panel, which includes data.
- the driving circuit II and the display panel main body 12 the display panel main body 12 includes the integrated gate driving circuit and the display panel pixel region 16, and the display panel pixel region 16 includes a plurality of pixel units 18 arranged in an array.
- the integrated cabinet driving circuit and the display panel with the integrated gate driving circuit of the invention adopt a double pull-down structure, so that the thin film transistors in the pull-down unit and the additional pull-down unit in the circuit can be in a bipolar voltage bias.
- the working environment effectively suppresses the threshold voltage drift of the thin film transistor in the pull-down unit and the additional pull-down unit, which prolongs the working life of the circuit, so that the circuit can better meet the requirements of the large and medium-sized display panels, and at the same time, the circuit structure is simple , low power consumption, also suitable for low temperature and high temperature work.
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Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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JP2016542977A JP6291585B2 (ja) | 2014-01-20 | 2014-01-24 | 集積ゲート駆動回路及び集積ゲート駆動回路を具備する表示パネル |
US14/348,892 US9117418B2 (en) | 2014-01-20 | 2014-01-24 | Gate driver on array (GOA) circuit and display panel with same |
KR1020167016476A KR101859854B1 (ko) | 2014-01-20 | 2014-01-24 | 집적 게이트 구동회로 및 집적 게이트 구동회로를 구비한 디스플레이 패널 |
GB1610210.5A GB2535928B (en) | 2014-01-20 | 2014-01-24 | Gate driver on array (goa) circuit and display panel with same |
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CN201410026204.2 | 2014-01-20 | ||
CN201410026204.2A CN103778896B (zh) | 2014-01-20 | 2014-01-20 | 集成栅极驱动电路及具有集成栅极驱动电路的显示面板 |
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PCT/CN2014/071377 WO2015106464A1 (zh) | 2014-01-20 | 2014-01-24 | 集成栅极驱动电路及具有集成栅极驱动电路的显示面板 |
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JP (1) | JP6291585B2 (zh) |
KR (1) | KR101859854B1 (zh) |
CN (1) | CN103778896B (zh) |
GB (1) | GB2535928B (zh) |
WO (1) | WO2015106464A1 (zh) |
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CN104064158B (zh) * | 2014-07-17 | 2016-05-04 | 深圳市华星光电技术有限公司 | 具有自我补偿功能的栅极驱动电路 |
CN104409054B (zh) * | 2014-11-03 | 2017-02-15 | 深圳市华星光电技术有限公司 | 低温多晶硅薄膜晶体管goa电路 |
CN104392700B (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 |
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 |
CN104537977B (zh) * | 2015-01-20 | 2017-08-11 | 京东方科技集团股份有限公司 | 一种goa单元及驱动方法、goa电路和显示装置 |
CN106251804B (zh) * | 2016-09-30 | 2018-12-21 | 京东方科技集团股份有限公司 | 移位寄存器单元、驱动方法、栅极驱动电路及显示装置 |
CN108665860B (zh) * | 2017-03-30 | 2019-11-08 | 京东方科技集团股份有限公司 | 一种goa单元及其驱动方法、goa驱动电路、显示装置 |
CN108231028B (zh) | 2018-01-22 | 2019-11-22 | 京东方科技集团股份有限公司 | 一种栅极驱动电路及其驱动方法、显示装置 |
TWI695248B (zh) * | 2018-03-28 | 2020-06-01 | 瑞鼎科技股份有限公司 | 應用於顯示驅動電路之省電控制裝置及省電控制方法 |
US11710435B2 (en) | 2019-10-18 | 2023-07-25 | Hefei Xinsheng Optoelectronics Technology Co., Ltd. | Shift register unit and driving method thereof, gate driving circuit, and display device |
CN111681624A (zh) * | 2020-06-19 | 2020-09-18 | 武汉华星光电技术有限公司 | 显示面板及栅极驱动电路驱动方法、显示装置 |
EP4170640A4 (en) | 2020-06-19 | 2024-05-01 | Wuhan China Star Optoelectronics Technology Co., Ltd. | DISPLAY PANEL, GATE DRIVING CIRCUIT DRIVING METHOD AND DISPLAY APPARATUS |
KR20220017574A (ko) * | 2020-08-04 | 2022-02-14 | 삼성디스플레이 주식회사 | 표시장치 |
CN118248094A (zh) * | 2020-10-15 | 2024-06-25 | 厦门天马微电子有限公司 | 像素电路、显示面板及其驱动方法和显示装置 |
CN114863872A (zh) * | 2022-05-27 | 2022-08-05 | 武汉华星光电半导体显示技术有限公司 | 显示模组及显示装置 |
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- 2014-01-24 WO PCT/CN2014/071377 patent/WO2015106464A1/zh active Application Filing
- 2014-01-24 US US14/348,892 patent/US9117418B2/en not_active Expired - Fee Related
- 2014-01-24 JP JP2016542977A patent/JP6291585B2/ja active Active
- 2014-01-24 GB GB1610210.5A patent/GB2535928B/en active Active
- 2014-01-24 KR KR1020167016476A patent/KR101859854B1/ko active IP Right Grant
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Publication number | Publication date |
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GB201610210D0 (en) | 2016-07-27 |
KR101859854B1 (ko) | 2018-05-21 |
CN103778896B (zh) | 2016-05-04 |
GB2535928A (en) | 2016-08-31 |
GB2535928B (en) | 2020-07-01 |
CN103778896A (zh) | 2014-05-07 |
US20150206488A1 (en) | 2015-07-23 |
JP6291585B2 (ja) | 2018-03-14 |
JP2017503204A (ja) | 2017-01-26 |
KR20160087887A (ko) | 2016-07-22 |
US9117418B2 (en) | 2015-08-25 |
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