WO2022095261A1 - Goa 电路及显示面板 - Google Patents
Goa 电路及显示面板 Download PDFInfo
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- WO2022095261A1 WO2022095261A1 PCT/CN2020/140525 CN2020140525W WO2022095261A1 WO 2022095261 A1 WO2022095261 A1 WO 2022095261A1 CN 2020140525 W CN2020140525 W CN 2020140525W WO 2022095261 A1 WO2022095261 A1 WO 2022095261A1
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- Prior art keywords
- thin film
- film transistor
- circuit unit
- pull
- node
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Classifications
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3674—Details of drivers for scan electrodes
- G09G3/3677—Details of drivers for scan electrodes suitable for active matrices only
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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
- 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
- G09G2310/08—Details of timing specific for flat panels, other than clock recovery
Definitions
- the invention relates to the field of display technology, in particular to a GOA circuit and a display panel.
- liquid crystal display devices have been widely used in various electronic products as display components of electronic equipment, and GOA (Gate Driver On Array, GOA circuit for short) is an important part of liquid crystal display devices, that is, using existing
- GOA Gate Driver On Array, GOA circuit for short
- the thin film transistor liquid crystal display array manufacturing process is a technology that makes the gate line scanning driving signal circuit on the array substrate to realize the driving method of the gate line scanning.
- Display panels based on low-temperature polysilicon (LTPS) technology can be classified into N-type metal-oxide-semiconductor (NMOS) type, n-type substrate, p-channel, and empty according to the type of thin-film transistor (TFT) used in the panel.
- NMOS N-type metal-oxide-semiconductor
- TFT thin-film transistor
- PMOS MOS transistor
- CMOS complementary metal oxide semiconductor
- GOA circuits are divided into NMOS circuits, PMOS circuits and CMOS circuits.
- CMOS circuits eliminate the PP (P doping) layer of mask and process, which is of great benefit to improving yield and reducing costs.
- NMOS TFT The carriers of NMOS TFT are electrons and have high mobility. Compared with PMOS (the carriers are holes), the device is more easily damaged.
- the performance on the panel is that the high temperature reliability of the product is insufficient, and it is prone to GOA failure and screen splitting. , especially the IN cell Touch (ITP) panel, the split screen phenomenon is more likely to occur at the touch pause level.
- ITP IN cell Touch
- the prior art GOA circuit As shown in Figure 1, the prior art GOA circuit.
- the circuit mainly includes the following parts: 1) Thin film transistors (NT1 ⁇ NT10) and two capacitors constitute the basic circuit working structure; 2) Thin film transistors (NT11 and NT12) constitute the All gate On module; 3 ) The thin film transistor (NT14) constitutes the All Gate Off module; 4) It has the function of forward and reverse scanning.
- the control signal (U2D) is high and the control signal (D2U) is low, it scans from top to bottom. On the contrary, when U2D is low level and D2U is high level, scan from bottom to top row by row.
- the minimum repeating unit is shown in Figure 2, with two basic units as a cycle; the signal timing diagram of this circuit is shown in Figure 3 display; other signals (such as GAS1) are low level under normal working conditions, and the signal GAS2 jumps from the low level of the abnormal display (Normal Display) to the high level during the touch period (TP Term).
- GAS1 the low level of the abnormal display
- TP Term the high level during the touch period
- the current touch panel usually needs to insert several TP Term in one frame of screen display to realize the touch function, but the N-type metal-oxide-semiconductor (NMOS) GOA maintains the required level transmission through the capacitance of the node Q point.
- NMOS N-type metal-oxide-semiconductor
- TFT thin film transistor
- the purpose of the present invention is to provide a GOA circuit to improve the stability of the GOA circuit.
- the present invention provides a GOA circuit, comprising a plurality of GOA circuit units connected in cascade, wherein the nth-stage GOA circuit unit includes: a pull-up control circuit unit (101), a pull-up circuit unit (102), a first pull-down control circuit a unit (103), a second pull-down control circuit unit (104), a pull-down circuit unit (105), a gate opening unit (106), a first capacitor (C1) and a second capacitor (C2); wherein the pull-up A control circuit unit (101), the pull-up circuit unit (102), the first pull-down control circuit unit (103), the second pull-down control circuit unit (104), the pull-down circuit unit (105) and the gate opening unit (105) is electrically connected to the first node (Q) and the second node (P); the pull-up control circuit unit (101) is connected to the first control signal (U2D) and the first control signal (U2D) respectively.
- the pull-up control circuit unit (101) is connected to the first control signal (U2
- the pull-up control circuit unit (101) is used to charge the first node (Q) in the circuit to a high potential; the pull-up circuit unit (102) is connected to the clock signal (CK(n) )) to pull up the output signal (Gn) of the nth stage GOA circuit unit to the high level of the clock signal (CK(n)); the first pull-down control circuit unit (103) is connected to the The clock signal of the previous stage (CK(n-1)) and the clock signal of the next stage (CK(n+1)), the first pull-down control circuit unit (103) is connected to the pull-up control circuit unit (101), the first pull-down control circuit unit (103) is used to control the forward and reverse scanning of the GOA unit of the nth stage; the second pull-down control circuit unit (104) accesses the third control signal (GAS2), during the display period of the display panel, the second pull-down control circuit unit (104) is used to make the second node (P) pull down the first node (Q) to a low
- the pull-up control circuit unit (101) includes: a first thin film transistor (NT1), the gate of the first thin film transistor (NT1) is connected to the scan drive signal G ( n-2), the source of the first thin film transistor (NT1) is connected to the first control signal (U2D), the drain of the first thin film transistor (T11) is connected to the first node (Q); the second Thin film transistor (NT2), the gate of the second thin film transistor (NT2) is connected to the scan drive signal G(n+2) of the n+2 th GOA circuit unit, and the source of the second thin film transistor (NT2) connected to the first node (Q), the drain of the second thin film transistor (NT2) is connected to the second control signal (D2U); and the fifth thin film transistor (NT5), the drain of the fifth thin film transistor (NT5)
- the gate electrode is respectively connected to the first node (Q) and the source electrode of the second thin film transistor (NT2), the drain electrode of the fifth thin film transistor (NT5) is connected to the second node (P), and
- the first pull-down control circuit unit (103) includes: a third thin film transistor (NT3), the gate of the third thin film transistor (NT3) is connected to the first control signal (U2D), the The source of the third thin film transistor (NT3) is connected to the clock signal (CK(n+1)) of the next stage; the fourth thin film transistor (NT4) is connected to the gate of the fourth thin film transistor (NT4).
- the second control signal (D2U), the drain of the fourth thin film transistor (NT4) is connected to the clock signal (CK(n-1)) of the previous stage; and the sixth thin film transistor (NT6), the The gate of the sixth thin film transistor (NT6) is respectively connected to the source of the fourth thin film transistor (NT4) and the drain of the third thin film transistor (NT3), and the source of the sixth thin film transistor (NT6) Connected to a high voltage signal (VGH), the drain stage of the sixth thin film transistor (NT6) is connected to the second node (P).
- VGH high voltage signal
- the second pull-down control circuit unit (104) includes: a seventh thin film transistor (NT7), the gate of the seventh thin film transistor (NT7) is connected to the pull-down circuit unit, and the seventh thin film transistor (NT7)
- the drain stage of NT7) is connected to the third control signal (GAS2); and the eighth thin film transistor (NT8), the gate of the eighth thin film transistor (NT8) is connected to the pull-up circuit unit, and the eighth thin film transistor (NT8) is connected to the pull-up circuit unit.
- the source of the transistor (NT8) is connected to the first node (Q), and the drain of the eighth thin film transistor (NT8) is connected to the source of the seventh thin film transistor (NT7).
- the pull-up circuit unit (102) includes: a ninth thin film transistor (T9), the gate of the ninth thin film transistor (T9) is connected to the high voltage signal (VGH), the nine thin film transistor (T9) The source of T9) is connected to the first node (Q); and the tenth thin film transistor (T10), the gate of the tenth thin film transistor (T10) is connected to the drain of the ninth thin film transistor (T9), The source of the tenth thin film transistor ( T10 ) is respectively connected to the pull-down circuit unit ( 105 ), the gate opening unit ( 106 ) and the scan driving signal G(n) of the n-th stage GOA circuit unit.
- the pull-down circuit unit (105) includes: an eleventh thin film transistor (T11), the gate of the eleventh thin film transistor (T11) is connected to the second node (P), the eleventh thin film transistor (T11) The drain of the thin film transistor ( T11 ) is connected to the scan driving signal G(n) of the n-th GOA circuit unit, and the source of the eleventh thin film transistor ( T11 ) is connected to the low voltage signal (VGL).
- the gate opening unit (106) includes: a twelfth thin film transistor (T12), the gate of the twelfth thin film transistor (T12) is connected to the second node (P), and the tenth thin film transistor (T12) is connected to the second node (P).
- the drains of the two thin film transistors (T12) are connected to the second node (P), and the sources of the twelfth thin film transistors (T12) are connected to the scan driving signal G(n) of the nth-level GOA circuit unit; and a thirteenth thin film transistor (T13), the gate of the thirteenth thin film transistor (T13) is connected to the gate of the twelfth thin film transistor (T12), and the drain of the thirteenth thin film transistor (T13)
- the electrode of the thirteenth thin film transistor ( T13 ) is connected to the low voltage signal (VGL), and the source electrode of the thirteenth thin film transistor ( T13 ) is connected to the second node (P).
- the GOA circuit includes an NMOS circuit, a PMOS circuit and a CMOS circuit.
- the present invention also provides a display panel including the GOA circuit.
- the driving architecture of the GOA circuit includes single driving or dual driving.
- the present invention provides a GOA circuit and a display panel, wherein the GOA circuit is provided with a second pull-down control circuit unit (104), and in combination with the timing diagram, during the touch pause period, for the pole transmission stage A node (Q), with the third control signal (GAS2) and the second control signal (D2U), is changed from a low-level signal to a high-level signal, so that the two leakage paths of the first node (Q) disappear , there is no leakage path at the Q point during the touch, thus maintaining the stability of the Q point.
- the GOA circuit is provided with a second pull-down control circuit unit (104), and in combination with the timing diagram, during the touch pause period, for the pole transmission stage A node (Q), with the third control signal (GAS2) and the second control signal (D2U), is changed from a low-level signal to a high-level signal, so that the two leakage paths of the first node (Q) disappear , there is no leakage path at the Q point during the touch,
- FIG. 1 is a circuit diagram of a GOA circuit provided by the prior art
- FIG. 2 is a circuit diagram of a GOA circuit repeating unit provided by the prior art
- Fig. 3 is the timing control and signal output waveform diagram of the GOA circuit provided by the prior art
- FIG. 4 is a circuit diagram of a GOA circuit provided by the present invention.
- Fig. 5 is the timing control and signal output waveform diagram of the GOA circuit provided by the present invention.
- FIG. 6 is a schematic diagram of one-side driving of a GOA circuit of a display panel provided by the present invention.
- FIG. 7 is a schematic diagram of double-side driving of the GOA circuit of the display panel provided by the present invention.
- first and second are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined as “first” or “second” may expressly or implicitly include one or more of that feature. In the description of this application, unless stated otherwise, “plurality” means two or more. Additionally, the term “comprising” and any variations thereof are intended to cover non-exclusive inclusion.
- the present invention provides a GOA circuit, which includes a plurality of GOA circuit units connected in cascade, wherein the nth-level GOA circuit unit includes: a pull-up control circuit unit (101), a pull-up circuit unit ( 102), a first pull-down control circuit unit (103), a second pull-down control circuit unit (104), a pull-down circuit unit (105), a gate open unit (106), a first capacitor (C1) and a second capacitor ( C2).
- the nth-level GOA circuit unit includes: a pull-up control circuit unit (101), a pull-up circuit unit ( 102), a first pull-down control circuit unit (103), a second pull-down control circuit unit (104), a pull-down circuit unit (105), a gate open unit (106), a first capacitor (C1) and a second capacitor ( C2).
- the pull-up control circuit unit (101), the pull-up circuit unit (102), the first pull-down control circuit unit (103), the second pull-down control circuit unit (104), the The pull-down circuit unit (105) and the gate opening unit (105) are both electrically connected to the first node (Q) and the second node (P).
- the pull-up control circuit unit (101) is respectively connected to the first control signal (U2D) and the second control signal (D2U), and the pull-up control circuit unit (101) is used to connect the first node (Q) in the circuit Charge to high potential.
- the pull-up control circuit unit (101) includes: a first thin film transistor (NT1), a second thin film transistor (NT2) and a fifth thin film transistor (NT5).
- the gate of the first thin film transistor (NT1) is connected to the scan driving signal G(n-2) of the n-2 th GOA circuit unit, and the source of the first thin film transistor (NT1) is connected to the first control Signal (U2D), the drain of the first thin film transistor (T11) is connected to the first node (Q).
- the gate of the second thin film transistor (NT2) is connected to the scan driving signal G(n+2) of the n+2 th GOA circuit unit, and the source of the second thin film transistor (NT2) is connected to the first node (Q), the drain of the second thin film transistor (NT2) is connected to the second control signal (D2U).
- the gate of the fifth thin film transistor (NT5) is respectively connected to the first node (Q) and the source of the second thin film transistor (NT2), and the drain of the fifth thin film transistor (NT5) is connected to the first node (Q) and the source of the second thin film transistor (NT2).
- the second node (P) is connected to the source of the fifth thin film transistor (NT5) with a low voltage signal (VGL).
- the pull-up circuit unit (102) is connected to a clock signal (CK(n)), so as to pull up the output signal (Gn) of the n-th stage GOA circuit unit to a high level of the clock signal (CK(n)). potential.
- the pull-up circuit unit (102) includes: a ninth thin film transistor (T9) and a tenth thin film transistor (T10).
- the gate of the ninth thin film transistor (T9) is connected to the high voltage signal (VGH), and the source of the ninth thin film transistor (T9) is connected to the first node (Q); and
- the gate of the tenth thin film transistor (T10) is connected to the drain of the ninth thin film transistor (T9), and the source of the tenth thin film transistor (T10) is connected to the pull-down circuit unit (105), the The gate open unit (106) and the scan drive signal G(n) of the n-th stage GOA circuit unit.
- the first pull-down control circuit unit (103) is respectively connected to the clock signal of the previous stage (CK(n-1)) and the clock signal of the next stage (CK(n+1)).
- a pull-up control circuit unit (103) is connected to the pull-up control circuit unit (101), and the first pull-down control circuit unit (103) is used to control forward and reverse scans of the nth-stage GOA unit.
- the first pull-down control circuit unit (103) includes: a third thin film transistor (NT3), a fourth thin film transistor (NT4) and a sixth thin film transistor (NT6).
- the gate of the third thin film transistor (NT3) is connected to the first control signal (U2D), and the source of the third thin film transistor (NT3) is connected to the clock signal (CK(n+1) of the next stage. )).
- the gate of the fourth thin film transistor (NT4) is connected to the second control signal (D2U), and the drain of the fourth thin film transistor (NT4) is connected to the clock signal (CK(n ⁇ 1) of the previous stage. )).
- the gate of the sixth thin film transistor (NT6) is respectively connected to the source of the fourth thin film transistor (NT4) and the drain of the third thin film transistor (NT3).
- the source is connected to a high voltage signal (VGH), and the drain of the sixth thin film transistor (NT6) is connected to the second node (P).
- the second pull-down control circuit unit (104) is connected to a third control signal (GAS2), and during the display period of the display panel, the second pull-down control circuit unit (104) is used to pull down the second node (P)
- the first node (Q) is at a low potential; during the period when the display panel is touched, the second pull-down control circuit unit (104) is used to prevent the non-cascading Q point from being pulled up abnormally.
- the second pull-down control circuit unit (104) includes: a seventh thin film transistor (NT7) and an eighth thin film transistor (NT8).
- NT8 During the display period, the non-cascade P point pulls down the Q point, keeping the Q point as a low level signal.
- NT7 During the touch period, GAS2 is at high level to prevent the Q point of non-gradation from being pulled up abnormally.
- the gate of the seventh thin film transistor (NT7) is connected to the pull-down circuit unit, and the drain of the seventh thin film transistor (NT7) is connected to the third control signal (GAS2).
- the gate of the eighth thin film transistor (NT8) is connected to the pull-up circuit unit, the source of the eighth thin film transistor (NT8) is connected to the first node (Q), and the eighth thin film transistor (NT8) ) is connected to the source of the seventh thin film transistor (NT7).
- the pull-down circuit unit (105) is connected to a low voltage signal (VGL) for pulling down the precharge of the first node (Q) and the potential of the n-th stage scan driving signal G(n) to a low potential .
- the pull-down circuit unit (105) includes: an eleventh thin film transistor (T11).
- the gate of the eleventh thin film transistor (T11) is connected to the second node (P), and the drain of the eleventh thin film transistor (T11) is connected to the scan driving signal G of the nth stage GOA circuit unit (n), the source of the eleventh thin film transistor ( T11 ) is connected to the low voltage signal (VGL).
- the gate opening unit (106) is connected to a fourth control signal (GAS1), and when an abnormal power-off occurs, the gate opening unit (106) is used to turn on all the gates of the display area, and release the inside of the pixel charge.
- GAS1 fourth control signal
- the gate opening unit (106) includes: a twelfth thin film transistor (T12) and a thirteenth thin film transistor (T13).
- GAS1 is used to give a high level, so that all the gates in the display area are turned on, and the charges in the pixels are released to prevent residual charges from causing afterimages.
- the gate of the twelfth thin film transistor (T12) is connected to the second node (P)
- the drain of the twelfth thin film transistor (T12) is connected to the second node (P)
- the tenth thin film transistor (T12) is connected to the second node (P).
- the sources of the two thin film transistors ( T12 ) are connected to the scan driving signal G(n) of the n-th GOA circuit unit.
- the gate of the thirteenth thin film transistor ( T13 ) is connected to the gate of the twelfth thin film transistor ( T12 ), and the drain of the thirteenth thin film transistor ( T13 ) is connected to the low voltage signal (VGL) , the source of the thirteenth thin film transistor (T13) is connected to the second node (P).
- One end of the first capacitor (C1) is connected to the first node (Q), the other end of the first capacitor (C1) is connected to a low voltage signal (VGL), and the first capacitor (C1) is used to provide and Maintain the pre-charged power of the first node (Q); one end of the second capacitor (C2) is connected to the second node (P), and the other end of the second capacitor (C2) is connected to a low voltage signal (VGL) ), the second capacitor (C2) is used to provide and maintain the low potential of the second node (P).
- the GOA circuit includes an NMOS circuit, a PMOS circuit and a CMOS circuit.
- the present invention provides a display panel including the GOA circuit.
- the GOA circuit is provided with a second pull-down control circuit unit (104), and in combination with the timing diagram, during the touch pause period, for the first node (Q) of the pole-transmission stage, the third control signal (GAS2) and the second control signal are matched.
- Signal (D2U) which is changed from a low-level signal to a high-level signal, so that the two leakage paths of the first node (Q) disappear, and there is no leakage path at the Q point during the touch, thus maintaining the stability of the Q point .
- the gate of NT2 corresponding to D2U is low level, and the gate of NT7 is low level for the non-cascade Q point, so the risk of the non-cascade Q point being pulled up abnormally is low.
- the driving architecture of the GOA circuit includes single driving or dual driving.
- the driving direction of the GOA circuit on the left and right sides is unidirectional driving, while the driving direction of the GOA circuit shown in FIG. 7 is simultaneous driving on the left and right sides.
- the number of clock signals of the GOA circuit may use 4CK as shown in FIG. 2, or may be 6CK or 8CK.
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Abstract
Description
Claims (16)
- 一种GOA电路,其中,包括级联的多个GOA电路单元,其中第n级GOA电路单元包括:上拉控制电路单元(101)、上拉电路单元(102)、第一下拉控制电路单元(103)、第二下拉控制电路单元(104)、下拉电路单元(105)、栅极打开单元(106)、第一电容(C1)以及第二电容(C2);其中,所述上拉控制电路单元(101)、所述上拉电路单元(102)、所述第一下拉控制电路单元(103)、所述第二下拉控制电路单元(104)、所述下拉电路单元(105)以及所述栅极打开单元(105)均电连接至第一节点(Q)以及第二节点(P);所述上拉控制电路单元(101)分别接入第一控制信号(U2D)以及第二控制信号(D2U),所述上拉控制电路单元(101)用以将电路中第一节点(Q)充电到高电位;所述上拉电路单元(102)接入时钟信号(CK(n)),用以将第n级GOA 电路单元的输出信号(Gn)拉高到所述时钟信号(CK(n))的高电位;所述第一下拉控制电路单元(103)分别接入上一级的时钟信号(CK(n-1))以及下一级的时钟信号(CK(n+1)),所述第一下拉控制电路单元(103)连接所述上拉控制电路单元(101),所述第一下拉控制电路单元(103)用以控制第n级的GOA单元的正向以及反向扫描;所述第二下拉控制电路单元(104)接入第三控制信号(GAS2),在显示面板显示期间,所述第二下拉控制电路单元(104)用以使所述第二节点(P)下拉所述第一节点(Q)至低电位;所述下拉电路单元(105)接入低电压信号(VGL),用以拉低所述第一节点(Q)预充电以及所述第n级的扫描驱动信号G(n)的电位至低电位;所述栅极打开单元(106)接入第四控制信号(GAS1),在异常断电发生时,所述栅极打开单元(106)用以使显示区的所有的栅极打开,释放像素内的电荷;所述第一电容(C1)一端连接所述第一节点(Q),所述第一电容(C1)的另一端连接低电压信号(VGL),所述第一电容(C1)用以提供并维持所述第一节点(Q)的预充电;所述第二电容(C2)一端连接所述第二节点(P),所述第二电容(C2)的另一端连接低电压信号(VGL),所述第二电容(C2)用以提供并维持所述第二节点(P)的低电位。
- 根据权利要求1所述的GOA电路,其中,所述上拉控制电路单元(101)包括:第一薄膜晶体管(NT1),所述第一薄膜晶体管(NT1)的栅极连接第n-2级GOA 电路单元的扫描驱动信号G(n-2),所述第一薄膜晶体管(NT1)的源极连接所述第一控制信号(U2D),所述第一薄膜晶体管(T11)的漏极连接第一节点(Q);第二薄膜晶体管(NT2),所述第二薄膜晶体管(NT2)的栅极连接第n+2级GOA电路单元的扫描驱动信号G(n+2),所述第二薄膜晶体管(NT2)的源极连接所述第一节点(Q),所述第二薄膜晶体管(NT2)的漏极连接第二控制信号(D2U);以及第五薄膜晶体管(NT5),所述第五薄膜晶体管(NT5)的栅极分别连接所述第一节点(Q)以及所述第二薄膜晶体管(NT2)的源极,所述第五薄膜晶体管(NT5)的漏极连接所述第二节点(P),所述第五薄膜晶体管(NT5)的源极连接低电压信号(VGL)。
- 根据权利要求1所述的GOA电路,其中,所述第一下拉控制电路单元(103)包括:第三薄膜晶体管(NT3),所述第三薄膜晶体管(NT3)的栅极连接所述第一控制信号(U2D),所述第三薄膜晶体管(NT3)的源极连接所述下一级的时钟信号(CK(n+1));第四薄膜晶体管(NT4),所述第四薄膜晶体管(NT4)的栅极连接所述第二控制信号(D2U),所述第四薄膜晶体管(NT4)的漏极连接所述上一级的时钟信号(CK(n-1));以及第六薄膜晶体管(NT6),所述第六薄膜晶体管(NT6)的栅极分别连接所述第四薄膜晶体管(NT4)的源极以及所述第三薄膜晶体管(NT3)的漏极,所述第六薄膜晶体管(NT6)的源极连接高电压信号(VGH),所述第六薄膜晶体管(NT6)漏级连接所述第二节点(P)。
- 根据权利要求1所述的GOA电路,其中,所述第二下拉控制电路单元(104)包括:第七薄膜晶体管(NT7),所述第七薄膜晶体管(NT7)的栅极连接所述下拉电路单元,所述第七薄膜晶体管(NT7)的漏级连接所述第三控制信号(GAS2);以及第八薄膜晶体管(NT8),所述第八薄膜晶体管(NT8)的栅极连接所述上拉电路单元,所述第八薄膜晶体管(NT8)的源极连接所述第一节点(Q),所述第八薄膜晶体管(NT8)的漏极连接所述第七薄膜晶体管(NT7)的源极。
- 根据权利要求1所述的GOA电路,其中,所述上拉电路单元(102)包括:第九薄膜晶体管(T9),所述第九薄膜晶体管(T9)的栅极连接所述高电压信号(VGH),所述九薄膜晶体管(T9)的源极连接所述第一节点(Q);以及第十薄膜晶体管(T10),所述第十薄膜晶体管(T10)的栅极连接所述第九薄膜晶体管(T9)的漏级,所述第十薄膜晶体管(T10)的源极分别连接所述下拉电路单元(105)、所述栅极打开单元(106)以及所述第n级GOA 电路单元的扫描驱动信号G(n)。
- 根据权利要求1所述的GOA电路,其中,所述下拉电路单元(105)包括:第十一薄膜晶体管(T11),所述第十一薄膜晶体管(T11)的栅极连接所述第二节点(P),所述第十一薄膜晶体管(T11)的漏极连接所述第n级GOA 电路单元的扫描驱动信号G(n),所述第十一薄膜晶体管(T11)的源极连接所述低电压信号(VGL)。
- 根据权利要求1所述的GOA电路,其中,所述栅极打开单元(106)包括:第十二薄膜晶体管(T12),所述第十二薄膜晶体管(T12)的栅极连接所述第二节点(P),所述第十二薄膜晶体管(T12)的漏极连接所述第二节点(P),所述第十二薄膜晶体管(T12)的源极连接所述第n级GOA 电路单元的扫描驱动信号G(n);以及第十三薄膜晶体管(T13),所述第十三薄膜晶体管(T13)的栅极连接所述第十二薄膜晶体管(T12)的栅极,所述第十三薄膜晶体管(T13)的漏极连接所述低电压信号(VGL),所述第十三薄膜晶体管(T13)的源极连接所述第二节点(P)。
- 根据权利要求1所述的GOA电路,其中,所述GOA电路包括NMOS电路,PMOS电路以及CMOS电路。
- 一种显示面板,其中,包括一GOA电路;其中,所述GOA电路包括级联的多个GOA电路单元,其中第n级GOA电路单元包括:上拉控制电路单元(101)、上拉电路单元(102)、第一下拉控制电路单元(103)、第二下拉控制电路单元(104)、下拉电路单元(105)、栅极打开单元(106)、第一电容(C1)以及第二电容(C2);其中,所述上拉控制电路单元(101)、所述上拉电路单元(102)、所述第一下拉控制电路单元(103)、所述第二下拉控制电路单元(104)、所述下拉电路单元(105)以及所述栅极打开单元(105)均电连接至第一节点(Q)以及第二节点(P);所述上拉控制电路单元(101)分别接入第一控制信号(U2D)以及第二控制信号(D2U),所述上拉控制电路单元(101)用以将电路中第一节点(Q)充电到高电位;所述上拉电路单元(102)接入时钟信号(CK(n)),用以将第n级GOA 电路单元的输出信号(Gn)拉高到所述时钟信号(CK(n))的高电位;所述第一下拉控制电路单元(103)分别接入上一级的时钟信号(CK(n-1))以及下一级的时钟信号(CK(n+1)),所述第一下拉控制电路单元(103)连接所述上拉控制电路单元(101),所述第一下拉控制电路单元(103)用以控制第n级的GOA单元的正向以及反向扫描;所述第二下拉控制电路单元(104)接入第三控制信号(GAS2),在显示面板显示期间,所述第二下拉控制电路单元(104)用以使所述第二节点(P)下拉所述第一节点(Q)至低电位;所述下拉电路单元(105)接入低电压信号(VGL),用以拉低所述第一节点(Q)预充电以及所述第n级的扫描驱动信号G(n)的电位至低电位;所述栅极打开单元(106)接入第四控制信号(GAS1),在异常断电发生时,所述栅极打开单元(106)用以使显示区的所有的栅极打开,释放像素内的电荷;所述第一电容(C1)一端连接所述第一节点(Q),所述第一电容(C1)的另一端连接低电压信号(VGL),所述第一电容(C1)用以提供并维持所述第一节点(Q)的预充电;所述第二电容(C2)一端连接所述第二节点(P),所述第二电容(C2)的另一端连接低电压信号(VGL),所述第二电容(C2)用以提供并维持所述第二节点(P)的低电位。
- 根据权利要求9所述的显示面板,其中,所述上拉控制电路单元(101)包括:第一薄膜晶体管(NT1),所述第一薄膜晶体管(NT1)的栅极连接第n-2级GOA 电路单元的扫描驱动信号G(n-2),所述第一薄膜晶体管(NT1)的源极连接所述第一控制信号(U2D),所述第一薄膜晶体管(T11)的漏极连接第一节点(Q);第二薄膜晶体管(NT2),所述第二薄膜晶体管(NT2)的栅极连接第n+2级GOA电路单元的扫描驱动信号G(n+2),所述第二薄膜晶体管(NT2)的源极连接所述第一节点(Q),所述第二薄膜晶体管(NT2)的漏极连接第二控制信号(D2U);以及第五薄膜晶体管(NT5),所述第五薄膜晶体管(NT5)的栅极分别连接所述第一节点(Q)以及所述第二薄膜晶体管(NT2)的源极,所述第五薄膜晶体管(NT5)的漏极连接所述第二节点(P),所述第五薄膜晶体管(NT5)的源极连接低电压信号(VGL)。
- 根据权利要求9所述的显示面板,其中,所述第一下拉控制电路单元(103)包括:第三薄膜晶体管(NT3),所述第三薄膜晶体管(NT3)的栅极连接所述第一控制信号(U2D),所述第三薄膜晶体管(NT3)的源极连接所述下一级的时钟信号(CK(n+1));第四薄膜晶体管(NT4),所述第四薄膜晶体管(NT4)的栅极连接所述第二控制信号(D2U),所述第四薄膜晶体管(NT4)的漏极连接所述上一级的时钟信号(CK(n-1));以及第六薄膜晶体管(NT6),所述第六薄膜晶体管(NT6)的栅极分别连接所述第四薄膜晶体管(NT4)的源极以及所述第三薄膜晶体管(NT3)的漏极,所述第六薄膜晶体管(NT6)的源极连接高电压信号(VGH),所述第六薄膜晶体管(NT6)漏级连接所述第二节点(P)。
- 根据权利要求9所述的显示面板,其中,所述第二下拉控制电路单元(104)包括:第七薄膜晶体管(NT7),所述第七薄膜晶体管(NT7)的栅极连接所述下拉电路单元,所述第七薄膜晶体管(NT7)的漏级连接所述第三控制信号(GAS2);以及第八薄膜晶体管(NT8),所述第八薄膜晶体管(NT8)的栅极连接所述上拉电路单元,所述第八薄膜晶体管(NT8)的源极连接所述第一节点(Q),所述第八薄膜晶体管(NT8)的漏极连接所述第七薄膜晶体管(NT7)的源极。
- 根据权利要求9所述的显示面板,其中,所述上拉电路单元(102)包括:第九薄膜晶体管(T9),所述第九薄膜晶体管(T9)的栅极连接所述高电压信号(VGH),所述九薄膜晶体管(T9)的源极连接所述第一节点(Q);以及第十薄膜晶体管(T10),所述第十薄膜晶体管(T10)的栅极连接所述第九薄膜晶体管(T9)的漏级,所述第十薄膜晶体管(T10)的源极分别连接所述下拉电路单元(105)、所述栅极打开单元(106)以及所述第n级GOA 电路单元的扫描驱动信号G(n)。
- 根据权利要求9所述的显示面板,其中,所述下拉电路单元(105)包括:第十一薄膜晶体管(T11),所述第十一薄膜晶体管(T11)的栅极连接所述第二节点(P),所述第十一薄膜晶体管(T11)的漏极连接所述第n级GOA 电路单元的扫描驱动信号G(n),所述第十一薄膜晶体管(T11)的源极连接所述低电压信号(VGL)。
- 根据权利要求9所述的显示面板,其中,所述栅极打开单元(106)包括:第十二薄膜晶体管(T12),所述第十二薄膜晶体管(T12)的栅极连接所述第二节点(P),所述第十二薄膜晶体管(T12)的漏极连接所述第二节点(P),所述第十二薄膜晶体管(T12)的源极连接所述第n级GOA 电路单元的扫描驱动信号G(n);以及第十三薄膜晶体管(T13),所述第十三薄膜晶体管(T13)的栅极连接所述第十二薄膜晶体管(T12)的栅极,所述第十三薄膜晶体管(T13)的漏极连接所述低电压信号(VGL),所述第十三薄膜晶体管(T13)的源极连接所述第二节点(P)。
- 根据权利要求9所述的显示面板,其中,所述GOA电路的驱动架构包括单驱动或双驱动。
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| CN114882849A (zh) * | 2022-05-13 | 2022-08-09 | 广州华星光电半导体显示技术有限公司 | Goa电路及显示面板 |
| CN114882849B (zh) * | 2022-05-13 | 2023-06-27 | 广州华星光电半导体显示技术有限公司 | Goa电路及显示面板 |
| CN115410510A (zh) * | 2022-08-30 | 2022-11-29 | 武汉华星光电技术有限公司 | 下拉电路、goa电路、其驱动方法和显示面板 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112331156A (zh) | 2021-02-05 |
| US12475862B2 (en) | 2025-11-18 |
| CN112331156B (zh) | 2021-11-23 |
| US20250182713A1 (en) | 2025-06-05 |
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