WO2015100813A1 - Goa电路结构 - Google Patents
Goa电路结构 Download PDFInfo
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- 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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- 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
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C19/00—Digital stores in which the information is moved stepwise, e.g. shift registers
- G11C19/28—Digital stores in which the information is moved stepwise, e.g. shift registers using semiconductor elements
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/04—Structural and physical details of display devices
- G09G2300/0404—Matrix technologies
- G09G2300/0408—Integration of the drivers onto the display substrate
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- 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
- G09G2300/0809—Several active elements per pixel in active matrix panels
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0202—Addressing of scan or signal lines
- G09G2310/0205—Simultaneous scanning of several lines in flat panels
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0243—Details of the generation of driving signals
- G09G2310/0251—Precharge or discharge of pixel before applying new pixel voltage
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0264—Details of driving circuits
- G09G2310/0286—Details of a shift registers arranged for use in a driving circuit
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/06—Details of flat display driving waveforms
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/08—Details of timing specific for flat panels, other than clock recovery
-
- 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
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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- Chemical & Material Sciences (AREA)
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Abstract
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Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020167014124A KR101818384B1 (ko) | 2013-12-30 | 2014-01-21 | Goa회로구조 |
| GB1607188.8A GB2534096B (en) | 2013-12-30 | 2014-01-21 | Goa circuit structure |
| US14/347,586 US9311880B2 (en) | 2013-12-30 | 2014-01-21 | GOA circuit structure |
| JP2016542677A JP6240787B2 (ja) | 2013-12-30 | 2014-01-21 | Goa回路構造 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310746276.X | 2013-12-30 | ||
| CN201310746276.XA CN103730094B (zh) | 2013-12-30 | 2013-12-30 | Goa电路结构 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2015100813A1 true WO2015100813A1 (zh) | 2015-07-09 |
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ID=50454144
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/CN2014/070940 Ceased WO2015100813A1 (zh) | 2013-12-30 | 2014-01-21 | Goa电路结构 |
Country Status (6)
| Country | Link |
|---|---|
| US (2) | US9311880B2 (zh) |
| JP (1) | JP6240787B2 (zh) |
| KR (1) | KR101818384B1 (zh) |
| CN (1) | CN103730094B (zh) |
| GB (1) | GB2534096B (zh) |
| WO (1) | WO2015100813A1 (zh) |
Cited By (1)
| 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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- 2014-01-21 KR KR1020167014124A patent/KR101818384B1/ko not_active Expired - Fee Related
- 2014-01-21 GB GB1607188.8A patent/GB2534096B/en not_active Expired - Fee Related
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Also Published As
| Publication number | Publication date |
|---|---|
| US9343032B2 (en) | 2016-05-17 |
| JP6240787B2 (ja) | 2017-11-29 |
| US20160055815A1 (en) | 2016-02-25 |
| GB2534096A (en) | 2016-07-13 |
| JP2017510830A (ja) | 2017-04-13 |
| GB2534096B (en) | 2020-10-28 |
| CN103730094A (zh) | 2014-04-16 |
| US9311880B2 (en) | 2016-04-12 |
| KR20160078439A (ko) | 2016-07-04 |
| CN103730094B (zh) | 2016-02-24 |
| KR101818384B1 (ko) | 2018-01-12 |
| US20150187312A1 (en) | 2015-07-02 |
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