WO2015100813A1 - Goa电路结构 - Google Patents

Goa电路结构 Download PDF

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Publication number
WO2015100813A1
WO2015100813A1 PCT/CN2014/070940 CN2014070940W WO2015100813A1 WO 2015100813 A1 WO2015100813 A1 WO 2015100813A1 CN 2014070940 W CN2014070940 W CN 2014070940W WO 2015100813 A1 WO2015100813 A1 WO 2015100813A1
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WIPO (PCT)
Prior art keywords
circuit
pull
point
level
clock signal
Prior art date
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Ceased
Application number
PCT/CN2014/070940
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English (en)
French (fr)
Inventor
戴超
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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Application filed by Shenzhen China Star Optoelectronics Technology Co Ltd filed Critical Shenzhen China Star Optoelectronics Technology Co Ltd
Priority to KR1020167014124A priority Critical patent/KR101818384B1/ko
Priority to GB1607188.8A priority patent/GB2534096B/en
Priority to US14/347,586 priority patent/US9311880B2/en
Priority to JP2016542677A priority patent/JP6240787B2/ja
Publication of WO2015100813A1 publication Critical patent/WO2015100813A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611Control of matrices with row and column drivers
    • G09G3/3674Details of drivers for scan electrodes
    • G09G3/3677Details of drivers for scan electrodes suitable for active matrices only
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611Control of matrices with row and column drivers
    • G09G3/3648Control of matrices with row and column drivers using an active matrix
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11CSTATIC STORES
    • G11C19/00Digital stores in which the information is moved stepwise, e.g. shift registers
    • G11C19/28Digital stores in which the information is moved stepwise, e.g. shift registers using semiconductor elements
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00Aspects of the constitution of display devices
    • G09G2300/04Structural and physical details of display devices
    • G09G2300/0404Matrix technologies
    • G09G2300/0408Integration of the drivers onto the display substrate
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00Aspects of the constitution of display devices
    • G09G2300/08Active 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
    • G09G2300/0809Several active elements per pixel in active matrix panels
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00Command of the display device
    • G09G2310/02Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0202Addressing of scan or signal lines
    • G09G2310/0205Simultaneous scanning of several lines in flat panels
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00Command of the display device
    • G09G2310/02Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0243Details of the generation of driving signals
    • G09G2310/0251Precharge or discharge of pixel before applying new pixel voltage
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00Command of the display device
    • G09G2310/02Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264Details of driving circuits
    • G09G2310/0286Details of a shift registers arranged for use in a driving circuit
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00Command of the display device
    • G09G2310/06Details of flat display driving waveforms
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00Command of the display device
    • G09G2310/08Details of timing specific for flat panels, other than clock recovery
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00Control of display operating conditions
    • G09G2320/04Maintaining the quality of display appearance
    • G09G2320/043Preventing or counteracting the effects of ageing

Definitions

  • the field of crystal display technology in particular, relates to a GOA circuit structure.
  • the liquid crystal display has many advantages such as thin body, power saving, no radiation, and has been widely used.
  • Most of the liquid crystal displays on the market today are backlight 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 peeling substrates, and apply driving voltages on the two glass substrates to control the rotation direction of the liquid crystal molecules to refract the light of the backlight module to produce a picture.
  • each pixel has a thin film transistor (TFT) whose gate (Gate) is connected to a horizontal scanning line, a drain (Drain) is connected to a vertical data line, and a source (Source) is connected to Pixel electrode.
  • TFT thin film transistor
  • the Gate Driver On Array is an Array process that uses the existing thin film transistor liquid crystal display array (Array) process to fabricate the Gate line scan drive signal circuit on an array (Array) substrate to realize the progressive scan of the Gate.
  • Array thin film transistor liquid crystal display array
  • the driving circuit of the ice flat scanning line can be fabricated on the substrate around the display area by using the original process of the liquid crystal display panel, so that it can replace the external IC to complete the driving of the horizontal scanning line.
  • GOA technology can reduce the bonding process of the IC, which has the opportunity to increase productivity and reduce product cost, and can make the LCD panel more suitable for making narrow borders or borderless display rpr / product G
  • the existing GOA circuit generally includes a plurality of cascaded GOA units, and each level of the GOA unit corresponds to driving a level one horizontal scan line.
  • GOA main structural unit comprises a pull-up circuit (Pull- up part), the control circuit 4 Li (Pull- up control part), which conduct electricity under 3 ⁇ 4 Traiisfer Part), lower-power?
  • the pull-up circuit is mainly responsible for outputting the clock signal (Clock) as a gate signal; the pull-up control circuit is responsible for controlling the turn-on time of the pull-up circuit, and is generally connected to the downlink signal transmitted by the GOA circuit of the previous stage or Gate.
  • the pull-down circuit is responsible for pulling Gate low to low level at the first time, that is, turning off the Gate signal; the pull-down sustain circuit is responsible for maintaining the Gate output signal and the Gate signal of the pull-up circuit (commonly referred to as Q point).
  • the off state ie negative potential
  • the bootstrap capacitor C boast
  • the secondary rise of the Q point which is beneficial to the G(N) output of the pull-up circuit.
  • the structure of the GOA circuit basically places the above parts in the same level of the GOA unit circuit.
  • the two important pull-down sustain circuits in the amorphous silicon GOA circuit are alternately applied to the same level of the GOA circuit, as shown in FIG.
  • FIG. it is a schematic diagram of a GOA circuit structure commonly used in the prior art.
  • the metal lines for transmitting the DC low voltage VSS and the four high frequency clock signals of CK1-CK4 are placed on the periphery of each level of the GOA circuit.
  • Each of the GOA units has a first pull-down maintaining circuit and a second pull-down maintaining circuit, and the first pull-down maintaining circuit and the second pull-down maintaining circuit are respectively connected between Q(N) and G(N) for alternating It works to keep Q ( N ) and G ( N ) off.
  • the Nth stage GOA unit circuit respectively accepts one CK signal of VSS, CKi ⁇ CK4, and generates a G() signal.
  • the STV signal is the start signal of the GOA circuit, so the STV signal is responsible for starting the first and second stage GOA unit circuits, and the start signal of the subsequent Nth stage GOA circuit is the ST of the downstream circuit portion of the previous N-2 stage circuit.
  • the signal of (N-2) is generated, so that the GOA driver circuit can be turned on step by step to realize the line scan driving.
  • the connection method between the GOA unit circuits shown in Fig. 1 ensures that the GOA signal can be transmitted step by step, so that the horizontal scanning lines of each level can be charged and discharged step by step.
  • the pull-down sustain circuit of the adjacent two-stage GOA unit does not interact with the Q point, so that the actual operation efficiency of the circuit is very low, because the Gate signal is only turned on for a moment, and the other is in a closed state for a long time, and the pull-down effect of the adjacent stage GOA unit is
  • the time and Q point waveforms are basically similar;
  • the pull-down sustain circuit part generally uses a high-frequency control signal, which increases the power consumption of the circuit, and also uses two sets of low-frequency control signals, but this also exacerbates the TFT stress.
  • the object of the present invention is to provide a GOA circuit structure, which reduces the working time of each pull-down sustaining circuit by sharing the GOA pull-down circuit, and has more time for stress recovery.
  • the present invention provides a GOA circuit structure including a plurality of cascaded twin GOA units, wherein N is a natural number, and the Nth stage GOA unit controls charging of the Nth horizontal scanning line of the display area, each The twin GOA unit includes a second N 1st GOA unit and a 2Nth GOA unit, and the second N 1 level GOA unit includes a second N-1 level gate signal point and a 2N-1 level horizontal scan line respectively.
  • the second N-stage GOA unit includes a third pull-down sustain circuit and a fourth pull-down sustain circuit respectively connected to the 2Nth-level gate signal point and the 2N-th horizontal scan line;
  • the second N-1 stage gate signal point is further connected to the third pull-down maintaining circuit and the fourth pull-down maintaining circuit, respectively, the second N-stage gate signal point is further connected to the first pull-down maintaining circuit and the second pull-down maintaining circuit;
  • the first pull-down maintaining circuit includes:
  • a first thin film transistor having a gate inputting a second clock signal, a drain and a source respectively inputting a first clock signal and connecting a first circuit point, and the first pull-down maintaining circuit operates according to a potential level of the first circuit point Decide
  • the second pull-down maintaining circuit includes:
  • a second thin film transistor having a gate inputting a fourth clock signal, a drain and a source respectively inputting a third clock signal and connecting a second circuit point, wherein the second pull-down maintaining circuit operates according to a potential of the second circuit point ;
  • the third pull-down maintaining circuit includes:
  • a third thin film transistor having a gate inputting a third clock signal, a drain and a source respectively inputting a second clock signal and a third circuit point, wherein the third pull-down maintaining circuit operates according to a potential of the third circuit point ;
  • the fourth pull-down maintaining circuit includes:
  • a tree clock inputs a first clock signal, a drain and a source respectively input a fourth clock signal and a fourth circuit point, and the fourth pull-down maintaining circuit operates according to a potential of the fourth circuit point ;
  • the first clock signal, the second clock signal, the third clock signal, and the fourth clock signal are configured to alternately operate the first pull-down maintaining circuit, the second pull-down maintaining circuit, the third pull-down maintaining circuit, and the fourth pull-down maintaining circuit .
  • the first pull-up clock signal, the second pull-up clock signal, the third pull-up clock signal, and the fourth pull-up clock signal are respectively input to the second N-1 stage, the second N level, the second N+1 stage, and the second N+
  • the pull-up circuit of the 2-stage GOA unit charges the corresponding horizontal scan lines of the display area, and the first clock signal, the second clock signal, the third clock signal and the fourth clock signal respectively correspond to the first pull-up clock signal , the second pull-up clock signal, the third pull-up clock signal, and the fourth pull-up time
  • the first clock signal, the second clock signal, the third clock signal, and the fourth clock signal respectively correspond to a low frequency clock signal.
  • the first pull-down maintaining circuit further includes:
  • a fifth thin film transistor having a bridge connected to the second N-stage bridge signal point, and a drain and a source respectively connected to the first circuit point and an input DC low voltage;
  • a sixth thin film transistor having a tree pole connected to the first circuit point, a drain and a source respectively connected to the second N-1 stage gate signal point and inputting the DC low voltage;
  • a seventh thin film transistor having a gate connected to the first circuit point, a drain and a source respectively connected to the 2N-1th horizontal scanning line and inputting the DC low voltage;
  • the eighth thin film transistor has a gate electrode connected to the second Nth gate signal point, and the drain and the source are respectively connected to the first circuit point and the DC low voltage is input.
  • the second pull-down maintaining circuit further includes:
  • a ninth thin film transistor having a * pole connected to the first gate signal point, a drain and a source respectively connected to the second circuit point and inputting the DC low voltage;
  • a tenth thin film transistor having a gate connected to the second circuit point, a drain and a source respectively connected to the second N-1 stage signal point and inputting the DC low voltage;
  • An eleventh thin film transistor having a drain connected to the second circuit point, a drain and a source respectively connected to the second N-level horizontal scan line and inputting the DC low voltage;
  • the twelfth thin film transistor has a gate connected to the second Nth gate signal point, and a drain and a source are respectively connected to the second circuit point and input to the DC low voltage.
  • the third pull-down maintaining circuit further includes:
  • a thirteenth thin film transistor having a gate connected to the second N-1 stage gate signal point, a drain and a source respectively connected to the third circuit point and inputting the DC low voltage;
  • a fourteenth thin film transistor having a gate connected to the third circuit point, a drain and a source respectively connected to the second Nth gate signal point and inputting the DC low voltage;
  • a fifteenth thin film transistor having a shed-pole connected to the third circuit point, a drain and a source respectively connected to the 2N-th horizontal scanning line and inputting the DC low voltage;
  • the sixteenth thin film transistor has a gate connected to the second Nth gate signal point, and a drain and a source are respectively connected to the third circuit point and input to the DC low voltage.
  • the fourth pull-down maintaining circuit further includes:
  • a seventeenth thin film transistor having a gate connected to the second N-1 stage gate signal point, a drain and a source respectively connected to the fourth circuit point and inputting the DC low voltage;
  • the eighteenth thin film transistor has a gate connected to the fourth circuit point, and a drain and a source are respectively connected The 2N-level cabinet signal point and the input of the DC low voltage;
  • a nineteenth thin film transistor having a gate connected thereto: - the drain and the source are respectively connected to the 2Nth horizontal scanning line and inputting the DC low voltage;
  • the twentieth thin film transistor has a gate connected to the second N L signal point, and a drain and a source are respectively connected to the fourth circuit point and input to the DC low voltage.
  • the second N-i level GOA unit further includes a pull-up control circuit, a pull-up circuit, a down-transmission circuit, a pull-down circuit and a bootstrap capacitor, and the pull-up circuit, the pull-down circuit and the bootstrap capacitor are respectively associated with the 2N-1th gate a pole signal point is connected to the second N 1 level horizontal scan line, and the pull-up control circuit and the down-transmission circuit (300) are respectively connected to the second N-level drain signal point;
  • the second N-stage GOA unit further includes a pull-up control circuit, a pull-up circuit, a downlink circuit, a pull-down circuit and a bootstrap capacitor, and the pull-up circuit, the pull-down circuit and the bootstrap capacitor respectively and the second N-level gate signal point
  • the second N-level horizontal scanning line is connected, and the pull-up control circuit and the downlink transmission circuit are respectively connected to the second N-th order* signal point.
  • the gate signal point of the second N-level GOA unit and the gate signal point of the second N-th GOA unit are connected together.
  • the second N-1 level GOA unit further includes a pull-up circuit, a pull-down circuit and a bootstrap capacitor, and the pull-up, pull-down circuit and bootstrap capacitor respectively correspond to the second N-i-level cabinet signal point and the second NN Level 1 horizontal scanning line connected;
  • the second N-stage GOA unit further includes a pull-up control circuit, a pull-up circuit, a downlink circuit, a pull-down circuit and a bootstrap capacitor, and the pull-up circuit, the pull-down circuit and the bootstrap capacitor respectively and the second N-level gate signal point
  • the second N-level horizontal scanning line is connected, and the pull-up control circuit and the lower transmission circuit are respectively connected to the second N-level gate signal point.
  • the present invention also provides a GOA circuit structure comprising a plurality of cascaded twin GOA units, wherein N is a natural number, and the Nth stage GOA unit controls charging of the Nth horizontal scanning line of the display area, each of the twin GOA units
  • the second N-1 level GOA unit includes a second N-1 level GOA unit, and the second N-1 level GOA unit includes a first pull-down maintaining circuit connected to the second N 1 stage gate signal point and the 2N 1 level horizontal scanning line, respectively.
  • a second pull-down sustain circuit the second stage
  • GOA unit includes signal point and 2N level water
  • the second N-1 stage gate signal point is further connected to the third pull-down maintaining circuit and the fourth pull-down maintaining circuit, respectively, wherein the second N-level gate signal points are respectively respectively
  • the first pull-down maintaining circuit includes:
  • the first thin film transistor, - the clock signal, the drain and the source are respectively input a clock signal and a connection to the first circuit point, whether the first pull-down maintaining circuit operates according to the level of the potential of the first circuit point;
  • the second pull-down maintaining circuit includes:
  • a second thin film transistor having a gate inputting a fourth clock signal, a drain and a source respectively inputting a third clock signal and connecting a second circuit point, wherein the second pull-down maintaining circuit operates according to a potential of the second circuit point ;
  • the third pull-down maintaining circuit includes:
  • a third thin film transistor having a gate inputting a third clock signal, a drain and a source respectively inputting a second clock signal and a third circuit point, wherein the third pull-down maintaining circuit operates according to a potential of the third circuit point ;
  • the fourth pull-down maintaining circuit includes:
  • a fourth thin film transistor having a gate inputting a first clock signal, a drain and a source respectively inputting a fourth clock signal and a fourth circuit point, wherein the fourth pull-down maintaining circuit operates according to a potential of the fourth circuit point ;
  • the first clock signal, the second clock signal, the third clock signal, and the fourth clock signal are configured to alternately operate the first pull-down maintaining circuit, the second pull-down maintaining circuit, the third pull-down maintaining circuit, and the fourth pull-down maintaining circuit ;
  • the first pull-up clock signal, the second pull-up clock signal, the third pull-up clock signal, and the fourth pull-up clock signal are respectively input to the second N-1 stage, the second N level, the second N+1 stage, and the second N+
  • the pull-up circuit of the 2-stage GOA unit charges the corresponding horizontal scan lines of the display area, and the first clock signal, the second clock signal, the third clock signal and the fourth clock signal respectively correspond to the first pull-up clock signal a second pull-up clock signal, a third pull-up clock signal, and a fourth pull-up clock signal;
  • the first clock signal, the second clock signal, the third clock signal, and the fourth clock signal respectively correspond to a low frequency clock signal
  • the first pull-down maintaining circuit further includes:
  • a fifth thin film transistor having a bridge connected to the second N-stage bridge signal point, and a drain and a source respectively connected to the first circuit point and an input DC low voltage;
  • a sixth thin film transistor having a gate connected to the first circuit point, a drain and a source respectively connected to the second N-1 stage gate signal point and inputting the DC low voltage;
  • a seventh thin film transistor having a gate connected to the first circuit point, a drain and a source respectively connected to the 2N-1th horizontal scanning line and inputting the DC low voltage;
  • An eighth thin film transistor having a smatter pole connected to the second Nth gate signal point, a drain and a source respectively connected to the first circuit point and inputting the DC low voltage;
  • the second pull-down maintaining circuit further includes:
  • a ninth thin film transistor having a tree pole connected to the second N-1 level* pole signal point, the drain and the source being respectively connected to the second circuit point and inputting the DC low voltage;
  • a tenth thin film transistor having a gate connected to the second circuit point, a drain and a source respectively connected to the second N-1 stage pole signal point and inputting the DC low voltage;
  • An eleventh thin film transistor having a gate connected to the second circuit point, a drain and a source respectively connected to the second N-i horizontal scanning line and inputting the DC low voltage;
  • a twelfth thin film transistor having a gate connected to the second N-th order* signal point, a drain and a source respectively connected to the second circuit point and inputting the DC low voltage;
  • the third pull-down maintaining circuit further includes:
  • a thirteenth thin film transistor having a gate connected to the second N-1 stage gate signal point, a drain and a source respectively connected to the third circuit point and inputting the DC low voltage;
  • a fourteenth thin film transistor having a drain connected to the third circuit point, a drain and a source respectively connected to the second Nth gate signal point and inputting the DC low voltage;
  • a fifteenth thin film transistor having a gate connected to the third circuit point, a drain and a source respectively connected to the 2Nth horizontal scanning line and inputting the DC low voltage;
  • a sixteenth thin film transistor having a gate connected to the second Nth gate signal point, a drain and a source respectively connected to the third circuit point and inputting the DC low voltage;
  • the fourth pull-down maintaining circuit further includes:
  • a seventeenth thin film transistor having a gate connected to the second N-1 stage gate signal point, a drain and a source respectively connected to the fourth circuit point and inputting the DC low voltage;
  • the eighteenth thin film transistor has a gate connected to the fourth circuit point, a drain and a source respectively connected to the second Nth gate signal point and inputting the DC low voltage;
  • a nineteenth thin film transistor having a gate connected to the fourth circuit point, a drain and a source respectively connected to the 2Nth horizontal scanning line and inputting the DC low voltage;
  • the twentieth thin film transistor has a cabinet connected to the second Nth gate signal point, and a drain and a source are respectively connected to the fourth circuit point and the DC low voltage is input.
  • the second N-1 level GOA unit further includes a pull-up control circuit, a pull-up circuit, a down-transmission circuit, a pull-down circuit and a bootstrap capacitor, and the pull-up circuit, the pull-down circuit and the bootstrap capacitor are respectively associated with the second N-1 cabinet a pole signal point is connected to the second N-1 level horizontal scan line, and the pull-up control circuit and the down-transmission circuit are respectively connected to the second N1-level gate signal point;
  • the second N-stage GOA unit further includes a pull-up control circuit, a pull-up circuit, a downlink circuit, a pull-down circuit and a bootstrap capacitor, and the pull-up circuit, the pull-down circuit and the bootstrap capacitor respectively and the second N-level gate signal point
  • the 2Nth horizontal scanning line is connected, and the pull-up control circuit and the lower transmission circuit are divided Do not connect to the 2N-level gate signal point.
  • the gate signal point of the 2Nth-order GOA unit and the gate signal point of the 2Nth-order GOA unit are connected together.
  • the second N-stage GOA unit further includes a pull-up circuit, a pull-down circuit and a bootstrap capacitor, and the pull-up circuit, the pull-down circuit and the bootstrap capacitor are respectively associated with the second N-1 stage, the bungee signal point and the second N- Level 1 horizontal scan line connection;
  • the second N-stage GOA unit further includes a pull-up control circuit, a pull-up circuit, a downlink circuit, a pull-down circuit and a bootstrap capacitor, and the pull-up circuit, the pull-down circuit and the bootstrap capacitor respectively and the 2N-level pole signal point and
  • the second N-level horizontal scanning line is connected, and the pull-up control circuit and the lower transmission circuit are respectively connected to the second N-level gate signal point.
  • the GOA circuit structure of the present invention can make each part work for 1/4 time and rest for 3/4 time by sharing the pull-down maintaining circuit, which can alleviate the stress of the key TFT of the pull-down sustaining circuit; sharing the Q point can reduce the GOA
  • Some modules of the circuit have similar functions.
  • the two-stage circuit only needs one pull-up control part, and can realize the secondary rise of the QS point potential, which is beneficial to the input of the gate signal.
  • Four sets of low-frequency signals are introduced to control the pull-down maintenance.
  • the circuit can reduce the power consumption of the circuit, and the 3 ⁇ 4 and more negative LCL is beneficial to achieve the stress recovery.
  • FIG. 1 is a schematic structural diagram of a GOA circuit commonly used in the prior art
  • FIG. 2 is a schematic diagram of a multi-level architecture of a GOA circuit structure of the present invention
  • FIG. 3 is a schematic diagram showing the circuit structure of a first preferred embodiment of the GOA circuit structure of the present invention.
  • FIG. 4 is a schematic diagram showing the input signal of the circuit structure shown in FIG. 3 and the waveforms of the respective key nodes;
  • FIG. 5 is a schematic diagram showing the circuit structure of the second preferred embodiment of the GOA circuit structure of the present invention.
  • FIG. 6 is a schematic diagram of a control signal and a signal of each node of the circuit structure shown in FIG. 5;
  • FIG. 7 is another schematic diagram of a signal connection of the circuit structure shown in FIG.
  • FIG. 8 is a timing diagram of the LC signals of the four sets of pull-down sustain circuits of FIG. 7 and a schematic diagram of signal connections. Specific travel mode
  • FIG. 2 it is a schematic diagram of a multi-level architecture of a GOA circuit structure of the present invention.
  • the new GOA circuit architecture proposed by the present invention is based on the sharing of each two-stage GOA circuit, especially the Q-point of the pull-down sustain circuit portion and the pull-up control circuit portion, and each two-stage GOA circuit outputs a two-stage gate waveform. This is called Twine-GOA (T100 in Figure 2).
  • Each Twined GOA accepts CK1/CK2/CK3/CK4./VSS/STV signals for circuit drive, and mainly outputs two sets of Gate waveforms, while the four sets of pull-down sustain circuits in TXvined GOA alternate, so that each works as long as 1/ 4 times, other 3Z4 time is used to do
  • the twin GOA unit mainly includes the following parts: pull-up control circuits 100 and 100, pull-up circuits 200 and 200', down-circuit circuits 300 and 300', pull-down circuits 400 and 400', first pull-down maintaining circuit 500, a second pull-down maintaining circuit 600, a third pull-down maintaining circuit 500, a fourth pull-down maintaining circuit 600', bootstrap capacitors 700 and 700, (Cboast), wherein the first pull-down maintaining circuit 500, the second pull-down maintaining circuit 600
  • the third pull-down maintaining circuit 500' and the fourth pull-down maintaining circuit 600 constitute four sets of pull-down sustain circuits and alternately operate, so that there is more time for Stress recovery.
  • T51 Gate is connected to CK2, Drain is connected to CK1, and Source is connected to P(2N-1); in the second pull-down maintaining circuit 600, T61 Gate is connected to C, Drain is connected to CK3, and Source is connected. K (2N 1);
  • the third pull-down maintaining circuit 500 the middle 5 ⁇ Gate terminal is connected to CK3, the Drain terminal is connected to CK2, the source terminal is connected to P(2N); the fourth pull-down maintaining circuit 600 is connected to the CK1, the Drain terminal is connected to the Drain terminal.
  • CK4 the source end is connected to K(2N).
  • T52, ⁇ 52', ⁇ 62, and T62' are terminated by Q(2N 1), T54, T54'.
  • Gates of T64 and T64' are terminated by Q(2N), which is mainly used to turn off the pull-down maintenance of the GOA unit (Twined-GOA) for the gate signal output.
  • FIG. 4 it is an input signal of the circuit structure shown in FIG. 3 and a waveform diagram of each key node. It can be seen that P(2N-1), K(2N-1), P(2N) 'K(2N) have a working time of 1/4 and a stress recovery time of 3/4, and Figure 3 shows Twined-GO.
  • the Q (2N-1) and Q(IN), G(2N 1) and G(2N) of the A circuit are independent, so only P(2N 1) and K(2N 1) are actually maintaining ( Holding ) Q (2N 1) and G(2N 1), P(2N) and K(2N) maintain Q(2N) and Gi2N), that is, each sub-circuit of each stage T ined-GOA circuit has only half of the time in dimension Hold, so there is a higher risk for the Q point, so some improvement is needed.
  • FIG. 5 it is a schematic circuit diagram of a second preferred embodiment of the GOA circuit structure of the present invention.
  • FIG. 5 is an improvement of Q(2N-1) and Q(2N) on the circuit structure shown in FIG. 3, that is, sharing Q points of two levels of GOA (Q Sharing, referred to as QS for short). Point), so that the four groups of pull-down sustain circuits can always achieve the Q point, which not only reduces the stress of the pull-down sustain circuit, but also solves the risk of the Q point of the circuit structure shown in FIG.
  • QS Q Sharing
  • the basic circuit architecture includes: a shared pull-up control circuit 100', a shared downlink circuit 300', two pull-up circuits 200 and 200, two pull-down circuits 400 and 400', and two bootstrap capacitors (C Boast) and four shared pull-down sustain circuits.
  • this Q-point shared architecture removes some redundant TFTs, is simpler and more practical, and has weak stress and low risk of Q.
  • T52, ⁇ 62, ⁇ 52 ⁇ 62, Gate is connected to QS point
  • Drain is connected to P(2N-1), K(2N-1), P(2N), K(2N), and the source is connected to DC low voltage VSS.
  • ⁇ 4 ⁇ is mainly used to discharge the charge of QS point
  • T31 is used to pull down G(2N-1), since T21 can assist in releasing G(2N-1) when QS is turned on, the size of T31 can be smaller.
  • Fig. 6 it is a schematic diagram of the control signal of the circuit structure shown in Fig. 5 and the signals of the respective nodes.
  • the STV signal is the circuit start signal, which is turned on only when the scan starts, and remains low at the back; the CK signal Duty Ratio is 50%, and then the P(2N-1) is generated by the overlap of the clock signals.
  • QS( ) will give three chances of raising, the first is to pass the signal input to the pull-up control circuit ⁇ 1 ⁇ , the second is due to CK1 or CK3 signal input G(2N-1), the third is due to CK2 or The signal of CK4 is input to G(2N), so that the potential of Q point can be raised higher to facilitate the input of G(2N-1) and G(2N) signals, which will produce QS(N) point potential as shown. Variety.
  • FIG. 7 it is another schematic diagram of the signal connection of the circuit structure shown in FIG.
  • Four sets of pull-down sustain circuits respectively access four sets of low frequency or ultra low frequency signals (LC) to generate P(2N 1) , K.(2N 1), P(2N) 'K(2N) signals as shown, and LCL (low frequency signal low potential) can be set less than the DC low voltage VSS, which can use a 3/4 rest time for a negative pressure recovery, which is more conducive to reducing stress. This can also reduce power consumption, but will Increase the difficulty of layout (Layout) wiring.
  • LC low frequency or ultra low frequency signals
  • the invention utilizes the misalignment of the clock signal and the sharing of the GOA pull-down circuit and the sharing of the Q point to reduce the half working time of each pull-down sustaining circuit, and has more time for stress recovery, reducing the stress effect of the main pull-down TFT; using four sets of low-frequency signals
  • the power consumption can be reduced, and the low-frequency signal negative potential can also be controlled to better restore the stress of the main pull-down TFT of the pull-down sustain circuit.
  • FIG. 8 it is the timing of the LC signal and the signal connection diagram of the group pull-down sustain circuit in Figure 7.
  • T51 Gate is connected to LC2, Drain is connected to LCI, Source is connected to P(2N 1); T61 Gate is connected to LC4, Drain is connected to LC3, Source is connected to K(2N-1); ⁇ 5 ⁇ Gate is connected to LC3, Drain Connect to LC2, connect Source to P(2N); T6V Gate is connected to LCI, Dram is connected to LC4, and Source is connected to K(2N).
  • the high-frequency signals CKi, CK2, CK3 and CK4 used in the present invention can be selected as clock signals having the same waveform and sequentially differing by a quarter cycle, and the low-frequency signals can also be selected as such.
  • the GOA circuit structure of the present invention has the following benefits:
  • the pull-down sustain circuit of the two-stage GOA circuit is shared. This will result in the effect of four sets of pull-down sustain circuits acting on the first-level GOA circuit. Then each circuit only needs to act for 1/4 time, and the line stress is restored, which is equivalent to mitigating Stress effect, extended
  • the Q points are shared by adjacent levels, and the T1 ⁇ 4ined-GOA architecture is constructed, which simplifies the circuit and realizes multiple rises of the Q point;
  • the input control signal shared by the pull-down maintenance circuit of the two-stage GOA circuit can use the original high-frequency clock signal to connect the Gate and Drain terminals of the TFT in two or two groups; or add four groups of low-frequency or even super Low-frequency control signals can reduce the power consumption of the circuit, and can also restore the stress by the low potential of the low-frequency signal.

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Abstract

一种GOA电路结构,包括级联的多个孪生GOA单元,每个所述孪生GOA单元包括第2N-1级GOA单元和第2N级GOA单元,具有与第2N-1级栅极信号点(Q(2N-1))和第2N级栅极信号点(Q(2N))连接的第一下拉维持电路(500),第二下拉维持电路(600),第三下拉维持电路(500')和第四下拉维持电路(600');通过输入第一时钟信号、第二时钟信号、第三时钟信号及第四时钟信号使该第一下拉维持电路(500)、第二下拉维持电路(600)、第三下拉维持电路(500')及第四下拉维持电路(600')交替工作。该GOA电路结构通过共享下拉维持电路可以让每个部分工作1/4时间,休息3/4时间,这样可以减轻下拉维持电路部分关键TFT的应力作用。

Description

晶显示技术领域, 尤其涉及 种 GOA电路结构。 背景技术
液晶显示器具有机身薄, 省电、 无辐射等众多优点, 得到了广泛的应 用。 现有市场上的液晶显示器大部分为背光型液晶显示器, 其包括液晶面 板及背光模组 ( backlight module ) 。 液晶面板的工作原理是在两片平行的 剥离基板当中放置液晶分子, 并在两片玻璃基板上施加驱动电压来控制液 晶分子的旋转方向, 以将背光模组的光线折射出来产生画面。
主动式液晶显示器中, 每个像素具有一个薄膜晶体管 (TFT ) , 其櫥 极(Gate )连接至水平扫描线, 漏极(Drain )连接至垂直方向的数据线, 源极(Source ) 则连接至像素电极。 在水平扫描线上施加足够的电压, 会 使得该条线上的所有 TFT打开, 此时该水平扫描线上的像素电极会与垂直 方向的数据线连接, 从而将数据线上的显示信号电压写入像素, 控制不同 液晶的透光度进而达到控制色彩的效果。 目前主动式液晶显示面板水平扫 描线的驱动主要由面板外接的 来完成, 外接的 IC可以控制各级水平扫 描线的逐级充电和放电。 而 Gate Driver On Array (阵列基板行驱动) , 简 称 GOA , 是利用现有薄膜晶体管液晶显示器阵列 (Array )制程将 Gate行 扫描驱动信号电路制作在阵列 (Array )基板上, 实现对 Gate 逐行扫描的 驱动方式。 因此, 可以运用液晶显示面板的原有制程将氷平扫描线的驱动 电路制作在显示区周围的基板上, 使之能替代外接 IC 来完成水平扫描线 的驱动。 GOA技术能减少夕卜接 IC的绑定 (bonding)工序, 有机会提升产能 并降低产品成本, 而且可以使液晶显示面板更适合制作窄边框或无边框的 显 rpr /品 G
现有的 GOA电路, 通常包括级联的多个 GOA单元, 每一级 GOA单 元对应驱动一级水平扫描线。 GOA单元的主要结构包括上拉电路(Pull- up part ) , 上 4立控制电路(Pull- up control part ) , 下传电 ¾ Traiisfer Part), 下 ·电 ?各 ( Key Pull-down Part ) ^ i维持电珞 ( Pull-down Holding Part ) , 以及负责 -电位抬升的自举 ( Boast ) 电容。 上拉电路主要负责将时 钟信号 (Clock )输出为柵极(Gate )信号; 上拉控制电路负责控制上拉电 路的打开时间, 一般连接前面级 GOA 电路传递过来的下传信号或者 Gate 信号; 下拉电路负责在第一时间将 Gate 拉低为低电位, 即关闭 Gate 信 号; 下拉维持电路则负责将 Gate输出信号和上拉电路的 Gate信号 (通常 称为 Q 点) 维持(Holding ) 在关闭状态 (即负电位) , 通常有两个下拉 维持模块交替作用; 自举电容 (C boast ) 则负责 Q点的二次抬升, 这样有 利于上拉电路的 G(N)输出。
现有技术中 GOA电路结构基本是将上述几部分放置在同一级 GOA单 元电路中, 尤其是非晶硅 GOA 电路中比较重要的两个下拉维持电路是交 替作用在同一级 GOA电路的, 如图 1所示, 其为现有技术常釆用的 GOA 电路结构示意图。 用于传递直流低电压 VSS、 以及 CK1-CK4的 4个高频 时钟信号的金属线放置于各级 GOA电路的外围。 各级 GOA单元分别具有 第一下拉维持电路和第二下拉维持电路, 第一下拉维持电路和第二下拉维 持电路分别连接在 Q ( N ) 和 G ( N )之间, 从而用于交替起作用将 Q ( N )和 G ( N ) 维持在关闭状态。 第 N级 GOA单元电路分别接受 VSS、 CKi〜CK4中的 1个 CK信号, 并产生 G( )信号。 STV信号为 GOA电路 的启动信号, 所以 STV信号负责启动第一级和第二级 GOA单元电路, 而 后面的第 N级 GOA电路的启动信号由前面 N-2级电路的下传电路部分的 ST(N- 2)的信号负责产生, 这样就可以逐级打开 GOA驱动电路, 实现行扫 描驱动。 图 1所示的各级 GOA单元电路间的连接方法可保证 GOA信号可 以逐级传递, 使得各级水平扫描线可以被逐級充电和放电。
】、 虽然 一和第^拉维持电路交替作用, 也就是工作时间和休息 时间各占一半, 但是对于 TFT 而言应力 (Stress )之后的恢复时间还是比 较短, 因此下拉维持电路的失效远比其他电路部分要严重;
2、 相邻两级 GOA单元的下拉维持电路和 Q点没有相互作用使得电路 实际作用效率很低, 因为 Gate信号打开只是一瞬间, 其他很长时间处于关 闭状态, 相邻级 GOA单元的下拉作用时间和 Q点波形基本是相似的;
3、 下拉维持电路部分一般采用的是高频控制信号, 这样会增加电路 的功耗, 也有采用两组低频控制信号, 但这样同时也加剧了 TFT 应力
( Stress )作用。 发明内容
因此, 本发明的目的在于提供一种 GOA电路结构, 通过 GOA下拉电 路共享实现减少每个下拉维持电路的工作时间, 有更多的时间进行应力恢 为实现上述目的, 本发明提供了一种 GOA 电路结构, 其包括级联的 多个孪生 GOA单元, 设 N为自然数, 第 N级 GOA单元控制对显示区域 第 N级水平扫描线充电, 每个所述孪生 GOA单元包括第 2N 1级 GOA单 元和第 2N级 GOA单元, 该第 2N 1级 GOA单元包括分别与其第 2N- 1级 栅极信号点和第 2N-1 级水平扫描线连接的第一下拉维持电路和第二下拉 维持电路, 该第 2N级 GOA单元包括分别与其第 2N级柵极信号点和第 2N级水平扫描线连接的第三下拉维持电路和第四下拉维持电路; 该第 2N- 1 级栅极信号点还分别连接该第三下拉维持电路和第四下拉维持电路, 该 第 2N 级柵极信号点还分别连接该第一下拉维持电路和第二下拉维持电 路;
该第一下拉维持电路包括:
第一薄膜晶体管, 其柵极输入第二时钟信号, 漏极和源极分别输入第 一时钟信号和连接第一电路点, 该第一下拉维持电路是否工作根据该第一 电路点的电位高低决定;
该第二下拉维持电路包括:
第二薄膜晶体管, 其栅极输入第四时钟信号, 漏极和源极分别输入第 三时钟信号和连接第二电路点, 该第二下拉维持电路是否工作根据该第二 电路点的电位高低决定;
该第三下拉维持电路包括:
第三薄膜晶体管, 其柵极输入第三时钟信号, 漏极和源极分别输入第 二时钟信号和连接第三电路点, 该第三下拉维持电路是否工作根据该第三 电路点的电位高低决定;
该第四下拉维持电路包括:
第四薄膜晶体管, 其树极输入第一时钟信号, 漏极和源极分别输入第 四时钟信号和连接第四电路点, 该第四下拉维持电路是否工作根据该第四 电路点的电位高低决定;
该第一时钟信号、 第二时钟信号、 第三时钟信号及第四时钟信号设置 为使该第一下拉维持电路、 第二下拉维持电路、 第三下拉维持电路及第四 下拉维持电路交替工作。
其中, 第一上拉时钟信号、 第二上拉时钟信号、 第三上拉时钟信号及 第四上拉时钟信号分别输入第 2N-1级, 第 2N级, 第 2N+1级和第 2N+2 级 GOA 单元的上拉电路以分别对显示区域相应的水平扫描线充电, 该第 一时钟信号、 第二时钟信号、 第三时钟信号及第四时钟信号分别对应为该 第一上拉时钟信号、 第二上拉时钟信号、 第三上拉时钟信号及第四上拉时 其中, 该第一时钟信号、 第二时钟信号、 第三时钟信号及第四时钟信 号分别对应为 个低频时钟信号。
其中, 该第一下拉维持电路还包括:
第五薄膜晶体管, 其橋极连接该第 2N- 级橋极信号点, 漏极和源极 分别连接该第一电路点和输入直流低电压;
第六薄膜晶体管, 其树极连接该第一电路点, 漏极和源极分别连接该 第 2N- 1級柵极信号点和输入该直流低电压;
第七薄膜晶体管, 其栅极连接该第一电路点 , 漏极和源极分别连接该 第 2N-1级水平扫描线和输入该直流低电压;
第八薄膜晶体管, 其棚 ·极连接该第 2N 级柵极信号点, 漏极和源极分 别连接该第一电路点和输入该直流低电压。
其中, 该第二下拉维持电路还包括:
第九薄膜晶体管, 其 *极连接该第级柵极信号点, 漏极和源极分别连 接该第二电路点和输入该直流低电压;
第十薄膜晶体管, 其柵极连接该第二电路点, 漏极和源极分别连接该 第 2N- 1级櫥极信号点和输入该直流低电压;
第十一薄膜晶体管, 其槲极连接该第二电路点, 漏极和源极分别连接 该第 2N- 级水平扫描线和输入该直流低电压;
第十二薄膜晶体管, 其柵极连接该第 2N 级栅极信号点, 漏极和源极 分别连接该第二电路点和输入该直流低电压。
其中, 该第三下拉维持电路还包括:
第十三薄膜晶体管, 其柵极连接该第 2N- 1 级柵极信号点, 漏极和源 极分别连接该第三电路点和输入该直流低电压;
第十四薄膜晶体管, 其柵极连接该第三电路点, 漏极和源极分别连接 该第 2N级栅极信号点和输入该直流低电压;
第十五薄膜晶体管, 其棚-极连接该第三电路点, 漏极和源极分别连接 该第 2N级水平扫描线和输入该直流低电压;
第十六薄膜晶体管, 其柵极连接该第 2N 级栅极信号点, 漏极和源极 分别连接该第三电路点和输入该直流低电压。
其中, 该第四下拉维持电路还包括:
第十七薄膜晶体管, 其柵极连接该第 2N- 1 級柵极信号点, 漏极和源 极分别连接该第四电路点和输入该直流低电压;
第十八薄膜晶体管, 其柵极连接该第四电路点, 漏极和源极分别连接 该第 2N级櫥极信号点和输入该直流低电压;
第十九薄膜晶体管, 其栅极连接该: 占 - 漏极和源极分别连接 该第 2N级水平扫描线和输入该直流低电压;
第二十薄膜晶体管, 其柵极连接该第 2N L信号点, 漏极和源极 分别连接该第四电路点和输入该直流低电压。
其中:
该第 2N- i級 GOA单元还包括上拉控制电路, 上拉电路, 下传电路, 下拉电路及自举电容, 该上拉电路、 下拉电路及自举电容分别与该第 2N-1 级栅极信号点和该第 2N 1 级水平扫描线连接, 该上拉控制电路和下传电 路(300 )分别与该第 2N〗级楣极信号点连接;
该第 2N级 GOA单元还包括上拉控制电路, 上拉电路, 下传电路, 下 拉电路及自举电容, 该上拉电路、 下拉电路及自举电容分别与该第 2N 级 栅极信号点和该第 2N 級水平扫描线连接, 该上拉控制电路和下传电路分 别与该第 2N级 *极信号点连接。
其中, 所述第 2N- 级 GOA单元的柵极信号点和第 2N级 GOA单元 的栅极信号点连接在一起。
其中, 该第 2N- 1 级 GOA单元还包括上拉电路, 下拉电路及自举电 容, 该上拉电、 下拉电路及自举电容分别与该第 2N- i 级櫥极信号点和该 第 2N 1级水平扫描线连.接;
该第 2N级 GOA单元还包括上拉控制电路, 上拉电路, 下传电路, 下 拉电路及自举电容, 该上拉电路、 下拉电路及自举电容分别与该第 2N 级 栅极信号点和该第 2N级水平扫描线连接, 该上拉控制电路和下传电路分 别与该第 2N级栅极信号点连接。
本发明还提供一种 GOA电路结构, 包括级联的多个孪生 GOA单元, 设. N为自然数, 第 N级 GOA单元控制对显示区域第 N級水平扫描线充 电, 每个所述孪生 GOA单元包括第 2N-1级 GOA单元和第 2N级 GOA单 元, 该第 2N- 1级 GOA单元包括分别与其第 2N 1级栅极信号点和第 2N 1 级水平扫描线连接的第一下拉维持电路和第二下拉维持电路, 该第 2 级
GOA单元包括 信号点和第 2N级水
第三下拉维持电路和第四下拉维持电路; 该第 2N- 1 级栅极信号点还分别 连接该第三下拉维持电路和第四下拉维持电路, 该第 2N 级栅极信号点还 分别
Figure imgf000006_0001
该第一下拉维持电路包括:
第一薄膜晶体管, -时钟信号, 漏极和源极分别输入第 一时钟信号和连接第一电路点, 该第一下拉维持电路是否工作根据该第一 电路点的电位高低决定;
该第二下拉维持电路包括:
第二薄膜晶体管, 其栅极输入第四时钟信号, 漏极和源极分别输入第 三时钟信号和连接第二电路点, 该第二下拉维持电路是否工作根据该第二 电路点的电位高低决定;
该第三下拉维持电路包括:
第三薄膜晶体管, 其栅极输入第三时钟信号, 漏极和源极分别输入第 二时钟信号和连接第三电路点, 该第三下拉维持电路是否工作根据该第三 电路点的电位高低决定;
该第四下拉维持电路包括:
第四薄膜晶体管, 其柵极输入第一时钟信号, 漏极和源极分别输入第 四时钟信号和连接第四电路点, 该第四下拉维持电路是否工作根据该第四 电路点的电位高低决定;
该第一时钟信号、 第二时钟信号、 第三时钟信号及第四时钟信号设置 为使该第一下拉维持电路、 第二下拉维持电路、 第三下拉维持电路及第四 下拉维持电路交替工作;
其中, 第一上拉时钟信号、 第二上拉时钟信号、 第三上拉时钟信号及 第四上拉时钟信号分别输入第 2N-1级, 第 2N级, 第 2N+1级和第 2N+2 级 GOA 单元的上拉电路以分别对显示区域相应的水平扫描线充电, 该第 一时钟信号、 第二时钟信号、 第三时钟信号及第四时钟信号分别对应为该 第一上拉时钟信号、 第二上拉时钟信号、 第三上拉时钟信号及第四上拉时 钟信号;
其中, 该第一时钟信号、 第二时钟信号、 第三时钟信号及第四时钟信 号分别对应为 个低频时钟信号;
其中, 该第一下拉维持电路还包括:
第五薄膜晶体管, 其橋极连接该第 2N- 级橋极信号点, 漏极和源极 分别连接该第一电路点和输入直流低电压;
第六薄膜晶体管, 其柵极连接该第一电路点, 漏极和源极分别连接该 第 2N- 1級柵极信号点和输入该直流低电压;
第七薄膜晶体管, 其栅极连接该第一电路点 , 漏极和源极分别连接该 第 2N-1级水平扫描线和输入该直流低电压;
第八薄膜晶体管, 其棚 ·极连接该第 2N 级柵极信号点, 漏极和源极分 别连接该第一电路点和输入该直流低电压; 其中, 该第二下拉维持电路还包括:
第九薄膜晶体管, 其树极连接该第 2N- 1 级 *极信号点, 漏极和源极 分别连接该第二电路点和输入该直流低电压;
第十薄膜晶体管, 其柵极连接该第二电路点, 漏极和源极分别连接该 第 2N-1级棚 ·极信号点和输入该直流低电压;
第十一薄膜晶体管, 其柵极连接该第二电路点, 漏极和源极分别连接 该第 2N- i级水平扫描线和输入该直流低电压;
第十二薄膜晶体管, 其栅极连接该第 2N 级 *极信号点, 漏极和源极 分别连.接该第二电路点和输入该直流低电压;
其中, 该第三下拉维持电路还包括:
第十三薄膜晶体管, 其栅极连接该第 2N- 1 级栅极信号点, 漏极和源 极分别连接该第三电路点和输入该直流低电压;
第十四薄膜晶体管, 其槲极连接该第三电路点, 漏极和源极分别连接 该第 2N级栅极信号点和输入该直流低电压;
第十五薄膜晶体管, 其栅极连接该第三电路点, 漏极和源极分别连接 该第 2N级水平扫描线和输入该直流低电压;
第十六薄膜晶体管, 其柵极连接该第 2N 级栅极信号点, 漏极和源极 分别连接该第三电路点和输入该直流低电压;
其中, 该第四下拉维持电路还包括:
第十七薄膜晶体管, 其栅极连接该第 2N- 1 級柵极信号点, 漏极和源 极分别连接该第四电路点和输入该直流低电压;
第十八薄膜晶体管, 其柵极连接该第四电路点, 漏极和源极分别连接 该第 2N级栅极信号点和输入该直流低电压;
第十九薄膜晶体管, 其栅极连接该第四电路点, 漏极和源极分别连接 该第 2N级水平扫描线和输入该直流低电压;
第二十薄膜晶体管, 其橱极连接该第 2N 级栅极信号点, 漏极和源极 分别连接该第四电路点和输入该直流低电压。
该第 2N- 1级 GOA单元还包括上拉控制电路, 上拉电路, 下传电路, 下拉电路及自举电容, 该上拉电路、 下拉电路及自举电容分别与该第 2N- 1 级櫥极信号点和该第 2N- 1 级水平扫描线连接, 该上拉控制电路和下传电 路分别与该第 2N 1级柵极信号点连接;
该第 2N级 GOA单元还包括上拉控制电路, 上拉电路, 下传电路, 下 拉电路及自举电容, 该上拉电路、 下拉电路及自举电容分别与该第 2N 级 柵极信号点和该第 2N 级水平扫描线连接, 该上拉控制电路和下传电路分 别与该第 2N级栅极信号点连接。
所述第 2N 1级 GOA单元的栅极信号点和第 2N级 GOA单元的栅极 信号点连接在一起。
该第 2N -】级 GOA单元还包括上拉电路, 下拉电路及自举电容, 该上 拉电路、 下拉电路及自举电容分别与该第 2N- 1 级.槲极信号点和该第 2N-1 级水平扫描线连接;
该第 2N级 GOA单元还包括上拉控制电路, 上拉电路, 下传电路, 下 拉电路及自举电容, 该上拉电路、 下拉电路及自举电容分别与该第 2N 级 极极信号点和该第 2N 级水平扫描线连接, 该上拉控制电路和下传电路分 别与该第 2N级栅极信号点连接。
本发明的 GOA 电路结构通过共享下拉维持电路可以让每个部分工作 1/4时间, 休息 3/4时间, 这样可以减轻下拉维持电路部分关键 TFT的应 力 ( Stress )作用; 共享 Q点可以减少 GOA电路的部分功能相似的模块, 两级电路只需要一个上拉控制部分, 而且可以实现 QS 点电位的二次抬 升, 这样有利于栅极(Gate )信号的输入; 引入四组低频信号控制下拉维 持电路可以降低电路功耗, ,¾且更负的 LCL 有利于实现负压应力 ( Stress )恢复作用。 附图说明
下面结合附图, 通过对本发明的具体实施方式详细描述, 将使本发明 的技术方案及其他有益效果显而易见。
附图中,
图 1为现有技术常采用的 GOA电路结构示意图;
图 2为本发明的 GOA电路结构的多级架构示意图;
图 3 为本发明的 GOA 电路结构的第一较佳实施例的电路结构示意 图;
图 4为图 3所示电路结构的输入信号和各个关键节点的波形示意图; 图 5 为本发明的 GOA 电路结构的第二较佳实施例的电路结构示意 图;
图 6为图 5所示电路结构的控制信号和各个节点信号的示意图; 图 7为图 5所示电路结构的另一种信号接法示意图;
图 8为图 7中四组下拉维持电路的 LC信号的时序以及信号接法示意 图。 具体实旅方式
参见图 2 , 其为本发明的 GOA 电路结构的多级架构示意图。 本发明 提出的新的 GOA电路架构基于每两级 GOA电路实现共享, 尤其是下拉维 持电路部分和上拉控制电路部分的 Q点, 每两级的 GOA电路会输出两级 栅极 ( Gate ) 波形, 这里称之为孪生 GOA单元 ( Twined-GOA ) (图 2中 T100部分) 。 每个 Twined GOA接受 CK1/CK2/CK3/CK4./VSS/STV信号 进行电路驱动, 主要输出两组 Gate波形, 而 TXvined GOA中四组下拉维持 电路是交替作用的, 这样每个只要工作 1/4 时间, 其他 3Z4 时间用来做
Stress 恢复, 这样可以大大降低应力 ( Stress )作用从而提高 GOA 电路的 操作寿命。
如图 3 所示, 其为本发明的 GOA电路结构的第一较佳实施例的电路 结构示意图。 孪生 GOA单元主要包括以下几部分: 上拉控制电路 100和 100,, 上拉电路 200和 200' , 下传电路 300和 300'为, 下拉电路 400和 400' , 第一下拉维持电路 500, 第二下拉维持电路 600, 第三下拉维持电路 500,, 第四下拉维持电路 600', 自举电容 700和 700, ( C boast ) , 其中第 一下拉维持电路 500, 第二下拉维持电路 600, 第三下拉维持电路 500'和 第四下拉维持电路 600,构成四组下拉维持电路且交替工作, 这样有更多的 时间进行 Stress恢复。
第一下拉维持电路 500中 T51 Gate端连接 CK2, Drain端连接 CK1 , Source端连接 P(2N-1); 第二下拉维持电路 600中 T61 Gate端连接 C , Drain端连接 CK3, Source 端连接 K(2N 1); 第三下拉维持电路 500,中 Τ5Γ Gate端连接 CK3, Drain端连接 CK2, Source端连接 P(2N); 第四下 拉维持电路 600,中 Τ6Γ Gate端连接 CK1 , Drain端连接 CK4, Source端 连接 K(2N)。 这样利用 CK信号之间的时序交叠部分可以产生四个独立的 下拉维持电路控制信号 P(2N- 1) 、 K(2N- 1)、 P(2N) 、 K(2N)。
其中 T52、 Τ52'、 Τ62、 T62'的 Gate 端接 Q(2N 1), T54、 T54'。
T64、 T64'的 Gate端接 Q(2N), 主要是为了楣极 ( Gate )信号输出时关闭 孪生 GOA单元(Twined- GOA ) 的下拉维持 '电路。
参见图 4, 其为图 3 所示电路结构的输入信号和各个关键节点的波形 示意图。 可以看出 P(2N- 1)、 K(2N- 1)、 P(2N) ' K(2N)的工作时间为 1/4, 应力恢复时间为 3/4, 而且图 3 所示 Twined- GO A 电路的 Q(2N- 1)和 Q(IN), G(2N 1)和 G(2N)是独立的, 因此实际上只有 P(2N 1)和 K(2N 1)在 维持 ( Holding ) Q(2N 1)和 G(2N 1), P(2N) 和 K(2N)在维持 Q(2N)和 Gi2N), 也就是说每级 T ined- GOA 电路的每个子电路只有一半时间在维 持, 这样对于 Q点来说存在较高的凤险, 因此需要进行一定的改进。
如图 5 所示, 其为本发明的 GOA电路结构的第二较佳实施例的电路 结构示意图。 结合图 3可看出, 图 5是在图 3所示电路结构上针对 Q(2N-1) 和 Q(2N)进行的改进, 也就是将两级 GOA的 Q点共享( Q Sharing, 简称 QS点), 这样就可以实现四组下拉维持电路对 Q点的一直作用, 既降低了 下拉维持电路应力作用, 又解决了图 3所示电路结构 Q点的风险。
基本电路架构包括: 一个共享的上拉控制电路 100', 一个共享的下传 电路 300' , 两个上拉电路 200和 200, , 两个下拉电路 400和 400' , 两个自 举电容 ( C Boast ) 以及四个共享的下拉维持电路。 相对于图 3所示电路结 构, 这种 Q点共享的架构去掉了一些多余的 TFT, 更加简单实用, 而且应 力作用弱、 Q点风险低。
T52、 Τ62、 Τ52 Τ62,的 Gate 端接 QS 点, Drain端分别接 P(2N- 1) 、 K(2N- 1)、 P(2N) 、 K(2N), Source端都接直流低电压 VSS , 主要是 在 QS 高电位时关闭下拉维持电路。 Τ4Γ主要是用来放掉 QS 点的电荷; T31用来拉低 G(2N- 1), 由于 QS打开时 T21可以辅助放掉 G(2N- 1 ), 因此 T31的尺寸 (Size )可以小一些; T31,用来拉低 G(2N); T22,用来作为孪生 GOA单元电路的下传信号。
如图 6所示, 是图 5所示电路结构的控制信号和各个节点信号的示意 图。 其中 QS(N)点变化比较复杂, 可以实现多次抬升。 STV信号为电路启 动信号, 只在开始扫描的时候打开, 后面一直处于低电位; CK信号占空 比 ( Duty Ratio )为 50%, 然后利用时钟信号的交叠部分产生 P(2N-1) 、 K(2N- 1)、 P(2N) 、 K(2N)点的下拉维持电路控制信号; 后面级的孪生 GOA单元下传信号只连接到偶数级 GOA子电路, 因此时序上与 CK2和 CK4刚好相同, 这样的做法主要是了避免共享 Q点后产生的错充问题。
QS( )会产生三次抬升的机会, 第一次是传递信号输入上拉控制电路 的 Τ1 Γ , 第二次是由于 CK1或 CK3的信号输入 G(2N-1) , 第三次是由于 CK2 或 CK4 的信号输入 G(2N), 这样 Q 点的电位可以抬升更高有利于 G(2N- 1)和 G(2N)信号的输入, 这样就会产生如图所示的 QS(N)点电位变 化。
如图 7所示, 是图 5所示电路结构的另一种信号接法示意图。 其中四 组下拉维持电路分别接入四组低频或超低频信号 (LC ) 产生如图所示的 P(2N 1) 、 K.(2N 1)、 P(2N) ' K(2N)信号, 而且 LCL (低频信号低电位)可 以设置的小于直流低电压 VSS , 这样可以利用 3/4 的休息时间进行一个负 压恢复作用, 这样更有利于减轻应力作用。 这样也可以降低功耗, 但是会 增加布局 (Layout )布线上的难度。
本发明利用时钟信号的错位和 GOA下拉电路共享和 Q点共享实现减 少每个下拉维持电路的一半工作时间, 有更多的时间进行应力恢复, 降低 主要下拉 TFT的应力作用; 采用四组低频信号可以降低功耗, 而且控制低 频信号负电位也可以更好的恢复下拉维持电路的主要下拉 TFT 的应力作 用。
如图 8所示, 是图 7中 组下拉维持电路的 LC信号的时序以及信号 接法示意图。 T51 Gate 端连接 LC2 , Drain端连接 LCI , Source 端连接 P(2N 1); T61 Gate端连接 LC4, Drain端连接 LC3 , Source端连接 K(2N- 1 ); Τ5 Γ Gate 端连接 LC3 , Drain端连接 LC2 , Source 端连接 P(2N); T6V Gate端连接 LCI, Dram端连接 LC4, Source端连接 K(2N)。 这样利 用 LC 信号之间的时序交叠部分可以产生四个独立的下拉维持电路控制信 号 P(2N 1) 、 K(2N- 1)、 P(2N) 、 K(2N)。
本发明所采用的高频信号 CKi, CK2 , CK3及 CK4可以选挥为波形 相同, 依次相差四分之一周期的时钟信号, 低频信号也可同样如此选择。
综上所述, 本发明的 GOA电路结构具有如下益处:
i、 两级 GOA电路的下拉维持电路共享, 这样就会产生四组下拉维持 电路作用于一级 GOA 电路的效果, 那么每个电路只需要作用 1/4 时间, 行应力恢复, 这样等于了减轻了应力作用, 延长了下
Figure imgf000012_0001
2、 相邻级共享 Q点, 构建 T¼ined- GOA架构, 可以简化电路且实现 Q点多次抬升;
3、 两级 GOA电路的下拉维持电路共享后的输入控制信号可以采用原 来的高频时钟信号, 利用两两一组的形式连接 TFT 的 Gate 端和 Drain 端; 也可以另外加四组低频甚至超低频控制信号, 可以降低电路功耗, 也 可以通过低频信号的低电位来更好的恢复应力作用。
以上所述, 对于本领域的普通技术人员来说, 可以根据本发明的技术 方案和技术构思作出其他各种相应的改变和变形, 而所有这些改变和变形 都应属于本发明后附的权利要求的保护范围。

Claims

权 利 要 求
】、 一种 G0A电路结构, 包括级联的多个孪生 GOA单元, 设 N为自 然数, 第 N级 GOA单元控制对显示区域第 N级水平扫描线充电, 每个所 述孪生 GOA单元包括第 2N-1级 GOA单元和第 2N级 GOA单元, 该第 2N-1级 GOA单元包括分别与其第 2N-1级栅极信号点和第 2N-1级水平扫 描线连接的第一下拉维持电路和第二下拉维持电路, 该第 2N级 GOA单元 包括分别与其第 2N级栅极信号点和第 2N 级水平扫描线连接的第三下拉 维持电路和第四下拉维持电路; 该第 2N 1 级柵极信号点还分别连接该第 三下拉维持电路和第四下拉维持电路, 该第 2N 级楣-极信号点还分别连接 该第一下拉维持电路和第二下拉维持电路;
该第一下拉维持电路包括:
第一薄膜晶体管, 其树极输入第二时钟信号, 漏极和源极分别输入第 一时钟信号和连接第一电路点, 该第一下拉维持电路是否工作根据该第一 电路点的电位高低决定;
该第二下拉维持电路包括:
第二薄膜晶体管, 其栅极输入第 时钟信号, 漏极和源极分别输入第 三时钟信号和连接第二电路点, 该第二下拉维持电路是否工作根据该第二 电路点的电位高低决定;
该第三下拉维持电路包括:
第三薄膜晶体管, 其柵极输入第三时钟信号, 漏极和源极分别输入第 二时钟信号和连接第三电路点, 该第三下拉维持电路是否工作根据该第三 电路点的电位高低决定;
该第四下拉维持电路包括:
第四薄膜晶体管, 其极极输入第 时钟信号, 漏极和源极分别输入第 四时钟信号和连接第四电路点, 该第四下拉维持电路是否工作根据该第四 电路点的电位高低决定;
该第一时钟信号、 第二时钟信号 第三时钟信号及第四时钟信号设置 为使该第一下拉维持电路、 第二下拉维持电路、 第三下拉维持电路及第四
2、 如权利要求 1所述的 GOA电路结构, 其中, 第一上拉时钟信号、 第二上拉时钟信号、 第三上拉时钟信号及第四上拉时钟信号分别输入第 2N-1级, 第 2N级, 第 2N+1级和第 2N+2级 GOA单元的上拉电路以分别 对显示区域相应的水平扫描线充电, 该第一时钟信号、 第二时钟信号、 第 三时钟信号及第四时钟信号分别对应为该第一上拉时钟信号、 第二上拉时 钟信号、 第三上拉时钟信号及第四上拉时钟信号。
3、 如权利要求 1所述的 GOA电路结构, 其中, 该第一时钟信号、 第 二时钟信号、 第三时钟信号及第四时钟信号分别对应为四个低频时钟信 a.
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4、 如权利要求 1所述的 GOA电路结构, 其中, 该第一下拉维持电路 还包括:
第五薄膜晶体管, 其栅极连接该第 2N 1 级栅极信号点, 漏极和源极 分别连接该第一电路点和输入直流低电压;
第六薄膜晶体管, 其柵极连接该第一电路点, 漏极和源极分别连接该 第 2N-1级栅极信号点和输入该直流低电压;
第七薄膜晶体管, 其栅极连接该第一电路点, 漏极和源极分别连接该 第 2N- 1级水平扫描线和输入该直流低电压;
第八薄膜晶体管, 其櫥极连.接该第 2N 级柵极信号点, 漏极和源极分 别连接该第一电路点和输入该直流低电压。
5、 如权利要求 I所述的 GOA电路结构, 其中, 该第二下拉维持电路 还包括:
第九薄膜晶体管, 其栅极连接该第 2N 1 级栅极信号点, 漏极和源极 分别连接该第二电路点和输入该直流低电压;
第十薄膜晶体管, 其柵极连接该第二电路点, 漏极和源极分别连接该 第 2N-1级栅极信号点和输入该直流低电压;
第十一薄膜晶体管, 其柵极连接该第二电路点, 漏极和源极分别连接 该第 2N- i级水平扫描线和输入该直流低电压;
第十二薄膜晶体管, 其柵极连接该第 2N 级栅极信号点, 漏极和源极 分别连.接该第二电路点和输入该直流低电压。
6、 如权利要求〗所述的 GOA电路结构, 其中, 该第三下拉维持电路 还包括:
第十三薄膜晶体管, 其柵极连接该第 2N- 1 级柵极信号点, 漏极和源 极分别连接该第三电路点和输入该直流低电压;
第十四薄膜晶体管, 其栅极连接该第三电路点, 漏极和源极分别连接 该第 2N级栅极信号点和输入该直流低电压;
第十五薄膜晶体管, 其栅极连接该第三电路点, 漏极和源极分别连接 该第 2N级水平扫描线和输入该直流低电压; 第十六薄膜晶体管, 其栅极连接该第 2N 级 *极信号点, 漏极和源极 分别连接该第三电路点和输入该直流低电压。
7, 如权利要求 1所述的 GOA电路结构, 其中, 该第四下拉维持电路 还包括:
第十七薄膜晶体管, 其楣-极连接该第 2N- 1 级楣-极信号点, 漏极和源 极分别连接该第四电路点和输入该直流低电压;
第十八薄膜晶体管, 其栅极连接该第四电路点, 漏极和源极分别连接 该第 2N级櫥极信号点和输入该直流低电压;
第十九薄膜晶体管, 其栅极连接该第四电路点, 漏极和源极分别连接 该第 2N级水平扫描线和输入该直流低电压;
第二十薄膜晶体管, 其柵极连接该第 2N 级栅极信号点, 漏极和源极 分别连接该第四电路点和输入该直流低电压。
8 , 如权利要求 1所述的 GOA电路结构, 其中:
该第 2N- i級 GOA单元还包括上拉控制电路, 上拉电路, 下传电路, 下拉电路及自举电容, 该上拉电路、 下拉电路及自举电容分别与该第 2N-1 级栅极信号点和该第 2N 1 级水平扫描线连接, 该上拉控制电路和下传电 路分别与该第 2N 1级柵极信号点连接;
该第 2N级 GOA单元还包括上拉控制电路, 上拉电路, 下传电路, 下 拉电路及自举电容, 该上拉电路、 下拉电路及自举电容分别与该第 2N 级 柵极信号点和该第 2N 級水平扫描线连接, 该上拉控制电路和下传电路分 别与该第 2N级柵极信号点连接。
9, 如权利要求 1所述的 GOA电路结构, 其中, 所述第 2N- 1级 GOA 单元的棚_极信号点和第 2N级 GOA单元的栅极信号点连接在一起。
10, 如权利要求 i 所述的 GOA电 结构, 其中, 该第 2N- i级 GOA 单元还包括上拉电路, 下拉电路及自举电容, 该上拉电路、 下拉电路及自 举电容分别与该第 2N 1级櫥极信号点和该第 2N- 1级水平扫描线连接; 该第 2N级 GOA单元还包括上拉控制电路, 上拉电路, 下传电路, 下 拉电路及自举电容, 该上拉电路、 下拉电路及自举电容分别与该第 2N 级 柵极信号点和该第 2N 级水平扫描线连接, 该上拉控制电路和下传电路分 别与该第 2N级栅极信号点连接。
11 , 一种 GOA电路结构, 包括级联的多个孪生 GOA单元, 设 N为 自然数, 第 N级 GOA单元控制对显示区域第 N级水平扫描线充电, 每个 所述孪生 GOA单元包括第 2N 1级 GOA单元和第 2N级 GOA单元, 该第 2N-1级 GOA单元包括分别与其第 2N- 1级柵极信号点和第 2N- 1级水平扫 描线连接的第一下拉维持电路和第二下拉维持电路, 该第 2N级 GOA单元 包括分别与其第 2N 级栅极信号点和第 2N 级水平扫描线连接的第三下拉 维持电路和第四下拉维持电路; 该第 2N 1 级橱极信号点还分别连接该第 三下拉维持电路和第四下拉维持电路, 该第 2N 级楣-极信号点还分别连接 该第一下拉维持电路和第二下拉维持电路;
该第一下拉维持电路包括:
第一薄膜晶体管, 其树极输入第二时钟信号, 漏极和源极分别输入第 一时钟信号和连接第一电路点, 该第一下拉维持电路是否工作根据该第一 电路点的电位高低决定;
该第二下拉维持电路包括:
第二薄膜晶体管, 其栅极输入第四时钟信号, 漏极和源极分别输入第 三时钟信号和连接第二电路点, 该第二下拉维持电路是否工作根据该第二 电路点的电位高低决定;
该第三下拉维持电路包括:
第三薄膜晶体管, 其柵极输入第三时钟信号, 漏极和源极分别输入第 二时钟信号和连接第三电路点, 该第三下拉维持电路是否工作根据该第三 电路点的电位高低决定;
该第四下拉维持电路包括:
第四薄膜晶体管, 其橱极输入第——时钟信号, 漏极和源极分别输入第 四时钟信号和连接第四电路点, 该第四下拉维持电路是否工作根据该第四 电路点的电位高低决定;
该第一时钟信号、 第二时钟信号 第三时钟信号及第四时钟信号设置 为使该第一下拉维持电路、 第二下拉维持电路、 第三下拉维持电路及第四 下拉维持电路交替工作;
其中, 第一上拉时钟信号、 第二上拉时钟信号、 第三上拉时钟信号及 第四上拉时钟信号分别输入第 2N-1级, 第 2N级, 第 2N+1级和第 2N+2 级 GOA 单元的上拉电路以分别对显示区域相应的水平扫描线充电, 该第 一时钟信号、 第二时钟信号、 第三时钟信号及第四时钟信号分别对应为该 第一上拉时钟信号、 第二上拉时钟信号、 第三上拉时钟信号及第四上拉时 钟信号;
其中, 该第一时钟信号、 第二时钟信号、 第三时钟信号及第四时钟信 号分别对应为 个低频时钟信号;
其中, 该第一下拉维持电路还包括: 分别连接该第一电路点和输入直流低电压;
第六薄膜晶体管, 其树极连接该第一电路点, 漏极和源极分别连接该 第 2N-1級柵极信号点和输入该直流低电压;
第七薄膜晶体管, 其柵极连接该第一电路点, 漏极和源极分别连接该 第 2N-1级水平扫描线和输入该直流低电压;
第八薄膜晶体管, 其櫥极连接该第 2N 级柵极信号点, 漏极和源极分 别连接该第一电路点和输入该直流低电压;
其中, 该第二下拉维持电路还包括:
第九薄膜晶体管, 其栅极连接该第 2N 1 级栅极信号点, 漏极和源极 分别连接该第二电路点和输入该直流低电压;
第十薄膜晶体管, 其柵极连接该第二电路点, 漏极和源极分别连接该 第 2N-1级栅极信号点和输入该直流低电压;
第十一薄膜晶体管, 其槲极连接该第二电路点, 漏极和源极分别连接 该第 2N- i级水平扫描线和输入该直流低电压;
第十二薄膜晶体管, 其柵极连接该第 2N 级栅极信号点, 漏极和源极 分别连接该第二电路点和输入该直流低电压;
其中, 该第三下拉维持电路还包括:
第十三薄膜晶体管, 其槲极连接该第 2N- i 級槲极信号点, 漏极.和源 极分别连接该第三电路点和输入该直流低电压;
第十四薄膜晶体管, 其柵极连接该第三电路点, 漏极和源极分别连接 该第 2N级栅极信号点和输入该直流低电压;
第十五薄膜晶体管, 其栅极连接该第三电路点, 漏极和源极分别连接 该第 2N级水平扫描线和输入该直流低电压;
第十六薄膜晶体管, 其树极连接该第 2N 级栅极信号点, 漏极和源极 分别连接该第三电路点和输入该直流低电压;
其中, 该第四下拉维持电路还包括:
第十七薄膜晶体管, 其楣-极连接该第 2N- 1 级楣-极信号点, 漏极和源 极分别连接该第四电路点和输入该直流低电压;
第十八薄膜晶体管, 其柵极连接该第四电路点, 漏极和源极分别连接 该第 2N级櫥极信号点和输入该直流低电压;
第十九薄膜晶体管, 其栅极连接该第四电路点, 漏极和源极分别连接 该第 2N级水平扫描线和输入该直流低电压;
第二十薄膜晶体管, 其柵极连接该第 2N 级栅极信号点, 漏极和源极 分别连接该第四电路点和输入该直流低电压。
12、 如权利要求 11所述的 GOA电路结构, 其中:
该第 2N- i級 GOA单元还包括上拉控制电路, 上拉电路, 下传电路, 下拉电路及自举电容, 该上拉电路、 下拉电路及自举电容分别与该第 2N-1 级栅极信号点和该第 2N 1 级水平扫描线连接, 该上拉控制电路和下传电 路分别与该第 2N 1级柵极信号点连接;
该第 2N级 GOA单元还包括上拉控制电路, 上拉电路, 下传电路, 下 拉电路及自举电容, 该上拉电路、 下拉电路及自举电容分别与该第 2N 级 栅极信号点和该第 2N 級水平扫描线连接, 该上拉控制电路和下传电路分 别与该第 2N级栅极信号点连接。
13、 如权利要求 11 所述的 GOA 电路结构, 其中, 所述第 2N-1 级
GOA单元的栅极信号点和第 2N级 GOA单元的橋极信号点连接在一起。
14, 如权利要求 ί ΐ所述的 GOA电路结构, 其中, 该第 2Ν- 1级 GOA 单元还包括上拉电路, 下拉电路及自举电容, 该上拉电路, 下拉电路及自 举电容分别与该第 2Ν- 1级櫪极信号点和该第 2Ν- 1级水平扫描线连接; 该第 2Ν级 GOA单元还包括上拉控制电路, 上拉电路, 下传电路, 下 拉电路及自举电容, 该上拉电路、 下拉电路及自举电容分别与该第 2Ν 级 栅极信号点和该第 2Ν级水平扫描线连接, 该上拉控制电路和下传电路分 别与该第 2Ν级栅极信号点连接。
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017031794A1 (zh) * 2015-08-27 2017-03-02 深圳市华星光电技术有限公司 电平转换电路及其电平转换方法

Families Citing this family (49)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104091577B (zh) * 2014-07-15 2016-03-09 深圳市华星光电技术有限公司 应用于2d-3d信号设置的栅极驱动电路
CN104078022B (zh) * 2014-07-17 2016-03-09 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
CN104064160B (zh) * 2014-07-17 2016-06-15 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
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
CN104078019B (zh) * 2014-07-17 2016-03-09 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
CN104269152B (zh) * 2014-10-22 2017-01-18 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行驱动电路
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
CN104505048A (zh) * 2014-12-31 2015-04-08 深圳市华星光电技术有限公司 一种goa电路及液晶显示装置
CN104766575B (zh) * 2015-04-07 2017-10-17 深圳市华星光电技术有限公司 一种goa电路及液晶显示器
CN104795034B (zh) * 2015-04-17 2018-01-30 深圳市华星光电技术有限公司 一种goa电路及液晶显示器
CN105096874B (zh) * 2015-08-12 2017-10-17 武汉华星光电技术有限公司 一种 goa 电路、阵列基板和液晶显示器
CN105161060B (zh) * 2015-08-18 2017-12-15 深圳市华星光电技术有限公司 扫描驱动电路及具有该电路的液晶显示装置
CN106023933B (zh) * 2016-07-21 2019-02-15 深圳市华星光电技术有限公司 一种goa电路及液晶显示器
CN106023936B (zh) * 2016-07-28 2018-10-23 武汉华星光电技术有限公司 扫描驱动电路及具有该电路的平面显示装置
CN106098003B (zh) * 2016-08-08 2019-01-22 武汉华星光电技术有限公司 Goa电路
CN106128380B (zh) * 2016-08-16 2019-01-01 深圳市华星光电技术有限公司 Goa电路
CN106297704B (zh) * 2016-08-31 2019-06-11 深圳市华星光电技术有限公司 一种栅极驱动电路
CN106157914B (zh) * 2016-08-31 2019-05-03 深圳市华星光电技术有限公司 一种栅极驱动电路
CN106157916A (zh) * 2016-08-31 2016-11-23 深圳市华星光电技术有限公司 一种栅极驱动单元及驱动电路
CN106448592B (zh) * 2016-10-18 2018-11-02 深圳市华星光电技术有限公司 Goa驱动电路及液晶显示装置
CN106448607B (zh) * 2016-11-28 2019-01-29 深圳市华星光电技术有限公司 Goa驱动电路及液晶显示装置
CN106683624B (zh) * 2016-12-15 2019-12-31 深圳市华星光电技术有限公司 Goa电路及液晶显示装置
CN106601205B (zh) 2016-12-30 2018-08-14 深圳市华星光电技术有限公司 栅极驱动电路以及液晶显示装置
CN106548759B (zh) * 2017-01-14 2018-09-18 深圳市华星光电技术有限公司 一种goa电路及液晶显示器
CN106842733B (zh) * 2017-02-13 2019-03-15 深圳市华星光电技术有限公司 显示面板及其阵列基板
CN106875886B (zh) * 2017-03-02 2019-11-12 京东方科技集团股份有限公司 起始信号生成电路、驱动方法和显示装置
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
CN106847227B (zh) * 2017-04-17 2018-11-02 深圳市华星光电半导体显示技术有限公司 Goa电路驱动架构
CN107146589A (zh) * 2017-07-04 2017-09-08 深圳市华星光电技术有限公司 Goa电路及液晶显示装置
CN107134271B (zh) * 2017-07-07 2019-08-02 深圳市华星光电技术有限公司 一种goa驱动电路
CN107221298B (zh) * 2017-07-12 2019-08-02 深圳市华星光电半导体显示技术有限公司 一种goa电路及液晶显示器
US10204586B2 (en) 2017-07-12 2019-02-12 Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd Gate driver on array (GOA) circuits and liquid crystal displays (LCDs)
CN107221299B (zh) * 2017-07-12 2019-06-07 深圳市华星光电半导体显示技术有限公司 一种goa电路及液晶显示器
CN107331360B (zh) * 2017-08-14 2019-12-24 深圳市华星光电半导体显示技术有限公司 Goa电路及液晶显示装置
US10386663B2 (en) * 2017-08-14 2019-08-20 Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd. GOA circuit and liquid crystal display device
CN107293269B (zh) * 2017-08-15 2019-06-21 京东方科技集团股份有限公司 一种移位寄存器及其驱动方法、栅极驱动电路
CN107393473B (zh) * 2017-08-25 2018-11-23 深圳市华星光电半导体显示技术有限公司 Goa电路
US10699659B2 (en) * 2017-09-27 2020-06-30 Shenzhen China Star Optoelectronics Technology Co. Ltd. Gate driver on array circuit and liquid crystal display with the same
CN107808650B (zh) * 2017-11-07 2023-08-01 深圳市华星光电半导体显示技术有限公司 Goa电路
CN107799083B (zh) * 2017-11-17 2020-02-07 武汉华星光电技术有限公司 一种goa电路
CN109949757B (zh) * 2017-12-21 2022-03-11 咸阳彩虹光电科技有限公司 扫描信号补偿方法、扫描信号补偿电路及显示器
CN112703552A (zh) * 2018-10-10 2021-04-23 深圳市柔宇科技股份有限公司 一种goa电路及显示装置
CN109637423A (zh) * 2019-01-21 2019-04-16 深圳市华星光电半导体显示技术有限公司 Goa器件及栅极驱动电路
CN109697966A (zh) * 2019-02-28 2019-04-30 上海天马微电子有限公司 一种阵列基板、显示面板及其驱动方法
CN110767190B (zh) * 2019-10-14 2021-09-24 深圳市华星光电半导体显示技术有限公司 Goa电路
CN113096607A (zh) * 2019-12-23 2021-07-09 深圳市柔宇科技股份有限公司 像素扫描驱动电路、阵列基板与显示终端
CN111261115B (zh) * 2020-03-31 2021-07-06 深圳市华星光电半导体显示技术有限公司 一种goa电路及显示装置
CN113628576B (zh) * 2021-08-17 2023-06-02 深圳市华星光电半导体显示技术有限公司 驱动电路
CN117456943B (zh) * 2023-09-19 2025-12-19 广州华星光电半导体显示技术有限公司 栅极驱动单元及显示装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101201518A (zh) * 2006-12-11 2008-06-18 三星电子株式会社 液晶显示器及其栅极驱动电路
US20130027283A1 (en) * 2011-07-29 2013-01-31 Stmicroelectronics S.R.L Charge-sharing path control device for a scan driver of an lcd panel
CN103310755A (zh) * 2013-07-03 2013-09-18 深圳市华星光电技术有限公司 阵列基板行驱动电路

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080211760A1 (en) * 2006-12-11 2008-09-04 Seung-Soo Baek Liquid Crystal Display and Gate Driving Circuit Thereof
KR101415562B1 (ko) * 2007-08-06 2014-07-07 삼성디스플레이 주식회사 게이트 구동회로 및 이를 가지는 표시장치
TWI380275B (en) * 2008-07-11 2012-12-21 Wintek Corp Shift register
KR101471553B1 (ko) * 2008-08-14 2014-12-10 삼성디스플레이 주식회사 게이트 구동 회로 및 이를 갖는 표시 장치
US7817771B2 (en) * 2008-12-15 2010-10-19 Au Optronics Corporation Shift register
KR101535820B1 (ko) * 2008-12-24 2015-07-13 엘지디스플레이 주식회사 쉬프트 레지스터
KR20100083370A (ko) * 2009-01-13 2010-07-22 삼성전자주식회사 게이트 구동회로 및 이를 갖는 표시장치
KR101354365B1 (ko) * 2011-12-30 2014-01-23 하이디스 테크놀로지 주식회사 쉬프트 레지스터 및 이를 이용한 게이트 구동회로
TWI483230B (zh) * 2013-01-14 2015-05-01 Novatek Microelectronics Corp 閘極驅動器及顯示面板的閘極線驅動方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101201518A (zh) * 2006-12-11 2008-06-18 三星电子株式会社 液晶显示器及其栅极驱动电路
US20130027283A1 (en) * 2011-07-29 2013-01-31 Stmicroelectronics S.R.L Charge-sharing path control device for a scan driver of an lcd panel
CN103310755A (zh) * 2013-07-03 2013-09-18 深圳市华星光电技术有限公司 阵列基板行驱动电路

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017031794A1 (zh) * 2015-08-27 2017-03-02 深圳市华星光电技术有限公司 电平转换电路及其电平转换方法

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