WO2016145691A1 - 栅极驱动电路及显示装置 - Google Patents

栅极驱动电路及显示装置 Download PDF

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Publication number
WO2016145691A1
WO2016145691A1 PCT/CN2015/075840 CN2015075840W WO2016145691A1 WO 2016145691 A1 WO2016145691 A1 WO 2016145691A1 CN 2015075840 W CN2015075840 W CN 2015075840W WO 2016145691 A1 WO2016145691 A1 WO 2016145691A1
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Prior art keywords
gate
signal line
source
circuit
outputs
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PCT/CN2015/075840
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English (en)
French (fr)
Inventor
肖军城
赵莽
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Wuhan China Star Optoelectronics Technology Co Ltd
TCL China Star Optoelectronics Technology Co Ltd
Original Assignee
Shenzhen China Star Optoelectronics Technology Co Ltd
Wuhan China Star Optoelectronics Technology Co Ltd
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Application filed by Shenzhen China Star Optoelectronics Technology Co Ltd, Wuhan China Star Optoelectronics Technology Co Ltd filed Critical Shenzhen China Star Optoelectronics Technology Co Ltd
Priority to US14/778,281 priority Critical patent/US9824621B2/en
Publication of WO2016145691A1 publication Critical patent/WO2016145691A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • G09G3/2085—Special arrangements for addressing the individual elements of the matrix, other than by driving respective rows and columns in combination
    • 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
    • G09G3/22—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 using controlled light sources
    • G09G3/30—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 using controlled light sources using electroluminescent panels
    • G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3266—Details of drivers for scan electrodes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • 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
    • 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
    • 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
    • G11C19/287—Organisation of a multiplicity of shift registers
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2230/00—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
    • 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
    • G09G2300/0833—Several active elements per pixel in active matrix panels forming a linear amplifier or follower
    • 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
    • G09G2310/021—Double addressing, i.e. scanning two or more lines, e.g. lines 2 and 3; 4 and 5, at a time in a first field, followed by scanning two or more lines in another combination, e.g. lines 1 and 2; 3 and 4, in a second field
    • 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
    • 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 present invention relates to the field of display technologies, and in particular to a gate driving circuit and a display device.
  • LCD Liquid Crystal Display
  • OLED Organic Light-Emitting Diode
  • the driving of the gate lines is mainly performed by a driving chip externally connected to the Array substrate, and the driving chip can control the stepwise charging and discharging of the respective gate lines.
  • the Gate Driver On Array (GOA) technology has been applied more and more.
  • the GOA technology realizes the progressive scanning of the gate lines by forming the gate driving circuit on the array substrate. Therefore, the gate driving circuit can be fabricated in the peripheral region of the array substrate by using the original process of the array substrate to replace the original one. External driver chip.
  • GOA technology can eliminate the bonding process of the driver chip, have the opportunity to increase the production capacity and reduce the product cost, and can reduce the frame width of the display device.
  • the present invention provides a gate driving circuit including a shift register, a first outputter, and a second outputter;
  • the shift register to the first outputter and the continuous scan cycle and the second scan cycle The second output device outputs a primary driving signal
  • the first output device In the first scanning period, the first output device outputs a gate driving signal to the first gate line under the driving of the primary driving signal;
  • the second outputter In the second scan period, the second outputter outputs a gate drive signal to the second gate line under the driving of the primary driving signal.
  • the shift register includes a latch and a NAND gate circuit
  • the latch receives the first trigger signal and outputs a second trigger signal before the first scan period and the second scan period;
  • the latch continuously outputs the second trigger signal, and the NAND circuit outputs the primary under the driving of the second trigger signal Drive signal.
  • the latch is connected to a first primary clock signal line, and the NAND gate circuit is connected to a second primary clock signal line;
  • the first primary clock signal line and the second primary clock signal line each output a pulse signal, and the phase difference between the two is 180°.
  • the latch comprises NMOS transistors T9, T10, T11, T12, T13, T14, and PMOS transistors T4, T5, T7, T8, T15, T16;
  • a gate of T7, T10, T13, T15 is connected to the first primary clock signal line, a gate of T4, T9 is connected to a first trigger signal end, and a gate of T8, T12 is connected to an output end of the latch;
  • the source of T13 is connected to a low-level signal line, the source of T15 is connected to a high-level signal line, and the drains of T13 and T15 are connected to the gates of T5 and T11;
  • the source of T4 and T8 is connected to the high-level signal line, the drain of T4 is connected to the source of T5, and the drain of T8 is connected to the source of T7;
  • the source of T9 and T12 is connected to the low-level signal line, the drain of T9 is connected to the source of T10, and the drain of T12 is connected to the source of T11;
  • T5, T7, T10, and T11 are connected to the gates of T14 and T16;
  • the source of T14 is connected to the low-level signal line
  • the source of T16 is connected to the high-level signal line
  • the drains of T14 and T16 are connected, and serve as the output end of the latch.
  • the NAND gate circuit includes NMOS transistors T41, T42, and PMOS transistors T39, T40;
  • a gate of T39, T41 is connected to the second primary clock signal line, and a gate of T40, T42 is connected to an output end of the latch;
  • the source of T42 is connected to the low-level signal line, the drain of T42 is connected to the source of T41, and the drain of T41 is used as the output end of the NAND circuit;
  • the sources of T39 and T40 are connected to the high-level signal line, and the drains of T39 and T40 are connected to the drain of T41.
  • the shift register further includes an inverter, the inverter includes an NMOS transistor T38 and a PMOS transistor T37;
  • T37 and T38 are connected to the output end of the NAND circuit, the source of T37 is connected to the high-level signal line, the source of T38 is connected to the low-level signal line, and the drains of T37 and T38 are connected, and The output of the shift register.
  • the shift register further includes a forward and reverse selection circuit.
  • the forward and reverse selection circuit includes NMOS transistors T1, T3, and PMOS transistors T0, T2:
  • T1 and T2 are connected to the forward scanning signal line, and the gates of T0 and T3 are connected to the reverse scanning signal line;
  • the source of T0 and T1 is connected to the output of the previous stage shift register or the forward trigger signal line, and the source of T2 and T3 is connected to the output of the first stage shift register or the reverse trigger signal line;
  • T0, T1, T2, and T3 are connected and serve as the output terminals of the forward and reverse selection circuits.
  • first output device is connected to the first secondary clock signal line
  • second output device is connected to the second secondary clock signal line
  • the first secondary clock signal line In the first scanning period, the first secondary clock signal line outputs a high level
  • the second secondary clock signal line outputs a high level.
  • the first output device includes a NAND gate circuit and a buffer
  • the NAND circuit performs a NAND operation on the high level outputted by the first secondary clock signal line and the primary driving signal, and outputs a low level;
  • the buffer receives the low level and outputs a gate drive signal to the first gate line.
  • the NAND gate circuit includes NMOS transistors T21 and T22, and a PMOS transistor T19. T20;
  • a gate of T19, T21 is connected to the first secondary clock signal line, and a gate of T20, T22 is connected to an output end of the shift register;
  • the source of T22 is connected to the low-level signal line, the drain of T22 is connected to the source of T21, and the drain of T21 is used as the output of the NAND circuit;
  • the sources of T19 and T20 are connected to a high-level signal line, and the drains of T19 and T20 are connected to the drain of T21;
  • the buffer includes NMOS transistors T18, T24, T26, and PMOS transistors T17, T23, T25;
  • T17 and T18 are connected to the output terminals of the NAND circuit, the drains of T17 and T18 are connected to the gates of T23 and T24, the drains of T23 and T24 are connected to the gates of T25 and T26, and the drains of T25 and T26 are leaked. Connecting the first gate line to the pole;
  • the sources of T17, T23, and T25 are connected to the high-level signal line, and the sources of T18, T24, and T26 are connected to the low-level signal line.
  • the second output device includes a NAND gate circuit and a buffer
  • the NAND gate circuit performs a NAND operation on the high level outputted by the second secondary clock signal line and the primary driving signal, and outputs a low level;
  • the buffer receives the low level and outputs a gate drive signal to the second gate line.
  • the NAND gate circuit includes NMOS transistors T29, T30, and PMOS transistors T27, T28;
  • a gate of T27, T29 is connected to the second secondary clock signal line, and a gate of T28, T30 is connected to an output end of the shift register;
  • the source of T30 is connected to the low-level signal line, the drain of T30 is connected to the source of T29, and the drain of T29 is used as the output end of the NAND circuit;
  • T27 and T28 are connected to a high-level signal line, and the drains of T27 and T28 are connected to the drain of T29;
  • the buffer includes NMOS transistors T32, T34, T36, and PMOS transistors T31, T33, T35;
  • T31 and T32 are connected to the output terminals of the NAND circuit, the drains of T31 and T32 are connected to the gates of T33 and T34, the drains of T33 and T34 are connected to the gates of T35 and T36, and the drains of T35 and T36 are leaked. Connecting the second gate line to the pole;
  • the sources of T31, T33, and T35 are connected to the high-level signal line, and the sources of T32, T34, and T36 are connected to the low-level signal line.
  • the gate driving circuit is a GOA gate driving circuit.
  • the present invention also provides a display device comprising a plurality of cascaded gate drive circuits, wherein the display device performs display in an interleaved driving manner.
  • the invention brings about the following beneficial effects: in the gate driving circuit provided by the invention, the shift register can output the primary driving signal in two consecutive scanning periods, and the first output device and the first driving unit are driven by the primary driving signal The two outputters are each capable of outputting a gate drive signal to a corresponding gate line. Therefore, the gate driving circuit provided by the present invention can drive two gate lines, and the invention significantly reduces the number of gate driving circuits compared to the prior art in which one gate driving circuit drives a gate line. Thereby, the width of the GOA circuit of the frame area of the array substrate can be reduced, thereby reducing the frame width of the display device.
  • FIG. 1 is a schematic diagram of a gate driving circuit according to Embodiment 1 of the present invention.
  • FIG. 2 is a schematic diagram of a display device according to Embodiment 2 of the present invention.
  • FIG. 3 is a schematic diagram of a gate driving circuit on the left side of FIG. 2;
  • FIG. 4 is a schematic diagram of a gate driving circuit on the right side of FIG. 2;
  • Figure 5 is a schematic view of any of the gate drive circuits of Figure 3;
  • FIG. 6 is a schematic diagram of any of the gate driving circuits of FIG. 4;
  • FIG. 7 is a signal timing diagram of a display device according to Embodiment 2 of the present invention.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • an embodiment of the present invention provides a gate driving circuit that can be fabricated in a peripheral region of an array substrate by using a GOA technique.
  • the gate drive circuit includes a shift register, a first outputter, and a second outputter.
  • the shift register outputs a primary drive signal to the first output and the second output during successive first scan periods and second scan periods.
  • the first output device In the first scan period, the first output device outputs a gate drive signal to the first gate line under the driving of the primary driving signal. In the second scan period, the second outputter outputs a gate drive signal to the second gate line under the driving of the primary drive signal.
  • the shift register can output the primary driving signal in two consecutive scanning periods, and the first output device and the second output device can respectively respond to the driving of the primary driving signal.
  • the gate line outputs a gate drive signal. Therefore, the gate driving circuit provided by the embodiment of the present invention can drive two gate lines. Compared with the prior art, a gate driving circuit drives a gate line, the embodiment of the present invention significantly reduces the gate. The number of driving circuits can reduce the width of the GOA circuit of the frame area of the array substrate, thereby reducing the frame width of the display device.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • the embodiment of the present invention provides a display device, which may be an active display device such as a liquid crystal display or an OLED display.
  • a display device which may be an active display device such as a liquid crystal display or an OLED display.
  • This embodiment is described by taking a display screen of a mobile phone as an example.
  • the middle of the array substrate of the display screen is the display area 10
  • the two sides of the display area are the frame area 20, that is, the GOA area.
  • a plurality of cascaded gate driving circuits provided in the first embodiment are formed for driving the gate lines in the display region 10.
  • the display is performed by an interlace driving method, so that all the gate driving circuits are equally divided on both sides of the display region 10 to reduce the width of the one-sided bezel region 20.
  • the resolution of the display screen is 1920 ⁇ 1080
  • FIG. 3 and FIG. 4 are respectively a cascade diagram of the gate driving circuits in the left side frame area 20 and the right side frame area 20 in FIG. 2, which can be seen.
  • a total of 1920 grid lines are provided on the display.
  • FIG. 5 is a specific circuit diagram of any of the gate driving circuits of FIG. 3
  • FIG. 6 is a specific circuit diagram of any of the gate driving circuits of FIG.
  • the gate driving circuit in this embodiment is fabricated by a CMOS process, and the ultra-high carrier mobility characteristic of low temperature poly-silicon (LTPS) can be used in the fabrication including NMOS.
  • Gate drive circuits eg, transistors T1, T3
  • PMOS eg, transistors T0, T2).
  • the gate driving circuit is composed of a shift register, a first outputter, and a second outputter.
  • the shift register mainly includes a latch and a NAND gate circuit.
  • VGH is a high level signal line and VGL is a low level signal line.
  • the latch is connected to the first primary clock signal line, and the NAND gate circuit is connected to the second primary clock signal line.
  • the latch is connected to CK1_1, and the NAND gate is connected to CK1_3 (as shown in FIG. 5); for example, in the second gate driving circuit of FIG. , the latch is connected to CK1_3, and the NAND gate is connected to CK1_1.
  • Both CK1_1 and CK1_3 output a pulse signal (refer to FIG. 7), and the phase difference between the two is 180°.
  • the latch includes NMOS transistors T9, T10, T11, T12, T13, T14, and PMOS transistors T4, T5, T7, T8, T15, T16.
  • the gates of T7, T10, T13, and T15 are connected to CK1_1, the gates of T4 and T9 are connected to the first trigger signal terminal Q(N-1), and the gates of T8 and T12 are connected to the output terminals of the latches.
  • the source of T13 is connected to VGL
  • the source of T15 is connected to VGH
  • the drains of T13 and T15 are connected to the gates of T5 and T11.
  • the source of T4 and T8 is connected to VGH, the drain of T4 is connected to the source of T5, and the drain of T8 is connected to the source of T7.
  • the sources of T9 and T12 are connected to VGL, the drain of T9 is connected to the source of T10, and the drain of T12 is connected to the source of T11.
  • the drains of T5, T7, T10, and T11 are connected to the gates of T14 and T16 at point P.
  • the source of T14 is connected to VGL
  • the source of T16 is connected to VGH
  • the drains of T14 and T16 are connected, and serve as the output of the latch.
  • the latch further includes a PMOS transistor T6.
  • the gate of T6 is connected to the reset signal line Reset, the source of T6 is connected to VGH, and the drain of T6 is connected to the gate of T14 and T16, that is, point P.
  • the NAND gate circuit in the shift register includes NMOS transistors T41 and T42, and PMOS transistors T39 and T40.
  • the gates of T39 and T41 are connected to CK1_3, and the gates of T40 and T42 are connected to the output terminals of the latches.
  • the source of T42 is connected to VGL
  • the drain of T42 is connected to the source of T41
  • the drain of T41 is used as the output of NAND gate.
  • the sources of T39 and T40 are connected to VGH
  • the drains of T39 and T40 are connected to the drain of T41.
  • the shift register further includes an inverter disposed after the NAND gate circuit, and the inverter includes an NMOS transistor T38 and a PMOS transistor T37.
  • the gates of T37 and T38 are connected to the output of the NAND circuit.
  • the source of T37 is connected to VGH
  • the source of T38 is connected to VGL
  • the drains of T37 and T38 are connected, and it is used as the output of the shift register.
  • the shift register further includes a forward and reverse selection circuit.
  • the forward and reverse signal lines U2D and the reverse scan signal line D2U output different high and low levels, and the forward and reverse selection circuits can selectively receive the gate drive circuit from the upper stage or the gate drive circuit from the next stage.
  • the first trigger signal enables two scan modes from top to bottom (forward scan) and bottom to top (inverse scan).
  • the forward and reverse selection circuits include NMOS transistors T1 and T3, and PMOS transistors T0 and T2.
  • the gates of T1 and T2 are connected to U2D, and the gates of T0 and T3 are connected to D2U.
  • the source of T0 and T1 is connected to the output of the shift register of the previous stage (if it is the first stage shift register, it is connected to the forward trigger signal line STVF), and the output of the first stage shift register after the source of T2 and T3 is connected. End (if the last stage shift register is connected to the STVR reverse trigger signal line).
  • the drains of T0, T1, T2, and T3 are connected and serve as the output terminals of the forward and reverse selection circuits.
  • the first output device includes a NAND gate circuit and a buffer.
  • the NAND gate circuit in the first outputter includes NMOS transistors T21, T22, and PMOS transistors T19, T20.
  • the gates of T19 and T21 are connected to the first secondary clock signal line CK2_1, and the gates of T20 and T22 are connected to the output terminal of the shift register.
  • the source of T22 is connected to VGL
  • the drain of T22 is connected to the source of T21
  • the drain of T21 is used as the output of the NAND circuit.
  • the sources of T19 and T20 are connected to VGH
  • the drains of T19 and T20 are connected to the drain of T21.
  • the buffer in the first outputter includes NMOS transistors T18, T24, T26, and PMOS transistors T17, T23, T25.
  • the gates of T17 and T18 are connected to the output terminals of the NAND circuit, the drains of T17 and T18 are connected to the gates of T23 and T24, the drains of T23 and T24 are connected to the gates of T25 and T26, and the drains of T25 and T26 are connected.
  • Gate line gn The sources of T17, T23, and T25 are connected to VGH, and the sources of T18, T24, and T26 are connected to VGL.
  • the second output device also includes a NAND gate circuit and a buffer.
  • the NAND gate circuit in the second outputter includes NMOS transistors T29, T30, and PMOS transistors T27, T28.
  • the gates of T27 and T29 are connected to the second secondary clock signal line CK2_2, and the gates of T28 and T30 are connected to the output terminal of the shift register.
  • the source of T30 is connected to VGL
  • the drain of T30 is connected to the source of T29
  • the drain of T29 is used as the output of NAND gate.
  • the sources of T27 and T28 are connected to VGH
  • the drains of T27 and T28 are connected to the drain of T29.
  • the buffer in the second outputter includes NMOS transistors T32, T34, T36, and PMOS transistors T31, T33, T35.
  • the sources of T31, T33, and T35 are connected to VGH, and the sources of T32, T34, and T36 are connected to VGL.
  • the gate driving circuit is composed of a shift register, a first outputter, a second outputter, and a forward and reverse selection circuit, and the specific circuit is substantially the same as that in FIG. The difference is that the latch is connected to the third primary clock signal line, and the NAND gate circuit is connected to the fourth primary clock signal line.
  • the latch is connected to CK1_2, and the NAND gate is connected to CK1_4 (as shown in FIG. 6); for example, in the second gate driving circuit of FIG. , the latch is connected to CK1_4, and the NAND gate is connected to CK1_2.
  • CK1_2 and CK1_4 are both The pulse signal is output (refer to FIG.
  • the first output device and the second output device both include a NAND gate circuit and a buffer, and the specific device therein is also substantially the same as in FIG. The difference is that the first output is connected to the third secondary clock signal line CK2_3, and the second output is connected to the fourth secondary clock signal line CK2_4.
  • forward scanning is taken as an example.
  • U2D always outputs a high level
  • D2U always outputs a low level
  • T0 and T1 in each shift register are turned on
  • T2 and T3 are turned off.
  • Reset first outputs a low-level pulse, so that all T6 in each shift register is turned on, then P is high, and then the second trigger in each shift register after the inverter consisting of T14 and T16. Signal Q(N) is kept low.
  • the first trigger signal Q(0) is output from the STVF to the left (and right) first shift register, so that T9 in the latch is turned on.
  • T9 in the latch is turned on.
  • CK1_1 outputs a high level, T10 in the latch. It is also turned on, so that the P point is low, and after the inverter composed of T14 and T16, the second trigger signal Q(1) is output. If it is an inversion scan, the first trigger signal is output by the STVR.
  • CK1_1 outputs a low level
  • CK1_3 outputs a high level
  • T11 in the latch is turned on
  • Q(1) turns on T12 in the latch
  • the P point can be kept low.
  • Q (1) can continue to output.
  • T41 and T42 are turned on at the same time, that is, CK1_3 and Q(1) perform NAND operation, output low level, and then pass through the inverter consisting of T37 and T38. , the primary drive signal G(1) is output.
  • the output is high after the operation, so G(1) cannot be output.
  • Q(1) at this time is also input to the second shift register and serves as the first trigger signal of the second shift register.
  • CK2_1 outputs a high level.
  • T21 and T22 are simultaneously turned on, that is, CK2_1 and G(1) perform NAND operation and output low level.
  • the buffer receives the low level and outputs a high level gate drive signal to the first gate line g1.
  • CK2_2 outputs a high level.
  • T29 and T30 are simultaneously turned on, that is, CK2_2 and G(1) perform NAND operation and output low level.
  • the buffer receives the low level and goes to the second gate line G2 outputs a high level gate drive signal.
  • CK1_3 is at a low level, and the shift register no longer outputs G(1), and the gate drive circuit outputs a low level to g1 and g2.
  • the second gate driving circuit In the fifth scan period t5 and the sixth scan period t6, the second gate driving circuit outputs gate driving signals to the fifth gate line g5 and the sixth gate line g6, respectively. By analogy, all gate lines can be driven.
  • each gate driving circuit on the right side of the display area is the same as that on the left side, except that two scanning periods are delayed in timing, and therefore will not be described again.
  • the display device provided by the embodiment of the invention adopts the GOA technology, and the gate driving circuits of the respective stages can be fabricated in the frame region of the array substrate by using a CMOS process.
  • one gate driving circuit can drive two gate lines, and the gate driving circuit is equally divided on both sides of the display area in a manner of interleaving driving, so that one gate driving circuit is available in the length direction.
  • the size is equivalent to 4 grid lines.
  • a gate driving circuit drives a gate line.
  • the size of the gate driving circuit in the length direction is increased by 4 times, and the width direction can be reduced. It is 1/4 of the original, thereby significantly reducing the width of the GOA circuit of the frame area of the array substrate, thereby reducing the frame width of the display device.

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Abstract

一种栅极驱动电路及显示装置，可用于液晶显示器、OLED显示器等显示装置，解决了现有的显示装置的边框宽度较大的技术问题。该栅极驱动电路在连续的t1和t2中，移位寄存器向第一输出器和第二输出器输出初级驱动信号（G(1)）；在t1中，第一输出器在初级驱动信号（G(1)）的驱动下，向第一栅线（g1）输出栅极驱动信号；在t2中，第二输出器在初级驱动信号（G(1)）的驱动下，向第二栅线（g2）输出栅极驱动信号。

Description

栅极驱动电路及显示装置
本申请要求享有2015年3月17日提交的名称为“栅极驱动电路及显示装置”的中国专利申请CN201510116871.4的优先权，其全部内容通过引用并入本文中。
技术领域
本发明涉及显示技术领域，具体地说，涉及一种栅极驱动电路及显示装置。
背景技术
随着显示技术的发展，液晶显示器(Liquid Crystal Display，简称LCD)、有机发光二极管(Organic Light-Emitting Diode，简称OLED)显示器等主动式显示装置已经被越来越多的使用在各个领域。
传统的主动式显示装置中，栅线的驱动主要由阵列(Array)基板外接的驱动芯片来完成，驱动芯片可以控制各条栅线的逐级充电和放电。而目前阵列基板行驱动(Gate Driver On Array，简称GOA)技术已被越来越多的应用。GOA技术通过将栅极驱动电路制作在阵列基板上，实现对栅线的逐行扫描，因此可以运用阵列基板的原有制程将栅极驱动电路制作在阵列基板的外围区域，以替代原有的外接驱动芯片。GOA技术能够省去驱动芯片的绑定(bonding)工序，有机会提升产能并降低产品成本，而且可以减小显示装置的边框宽度。
但是，在当前显示装置不断向小巧、轻薄的方向发展的趋势下，现有的显示装置的边框宽度仍然较大，难以满足当前对窄边框的需求。
发明内容
本发明的目的在于提供一种栅极驱动电路及显示装置，以解决现有的显示装置的边框宽度较大的技术问题。
本发明提供一种栅极驱动电路，包括移位寄存器、第一输出器和第二输出器；
在连续的第一扫描周期和第二扫描周期中，所述移位寄存器向所述第一输出器和所述 第二输出器输出初级驱动信号；
在所述第一扫描周期中，所述第一输出器在所述初级驱动信号的驱动下，向第一栅线输出栅极驱动信号；
在所述第二扫描周期中，所述第二输出器在所述初级驱动信号的驱动下，向第二栅线输出栅极驱动信号。
进一步的是，所述移位寄存器中包括锁存器和与非门电路；
在所述第一扫描周期和所述第二扫描周期之前，所述锁存器接收第一触发信号，并输出第二触发信号；
在所述第一扫描周期和所述第二扫描周期中，所述锁存器持续输出所述第二触发信号，所述与非门电路在所述第二触发信号的驱动下输出所述初级驱动信号。
优选的是，所述锁存器连接有第一初级时钟信号线，所述与非门电路连接有第二初级时钟信号线；
所述第一初级时钟信号线和所述第二初级时钟信号线均输出脉冲信号，且二者的相位差为180°。
优选的是，所述锁存器包括NMOS晶体管T9、T10、T11、T12、T13、T14，及PMOS晶体管T4、T5、T7、T8、T15、T16；
T7、T10、T13、T15的栅极连接所述第一初级时钟信号线，T4、T9的栅极连接第一触发信号端，T8、T12的栅极连接所述锁存器的输出端；
T13的源极连接低电平信号线，T15的源极连接高电平信号线，T13、T15的漏极与T5、T11的栅极连接；
T4、T8的源极连接高电平信号线，T4的漏极连接T5的源极，T8的漏极连接T7的源极；
T9、T12的源极连接低电平信号线，T9的漏极连接T10的源极，T12的漏极连接T11的源极；
T5、T7、T10、T11的漏极与T14、T16的栅极连接；
T14的源极连接低电平信号线，T16的源极连接高电平信号线，T14、T16的漏极相连，且作为所述锁存器的输出端。
优选的是，所述与非门电路包括NMOS晶体管T41、T42，及PMOS晶体管T39、T40；
T39、T41的栅极连接所述第二初级时钟信号线，T40、T42的栅极连接所述锁存器的输出端；
T42的源极连接低电平信号线，T42的漏极连接T41的源极，T41的漏极作为所述与非门电路的输出端；
T39、T40的源极连接高电平信号线，T39、T40的漏极连接T41的漏极。
进一步的是，所述移位寄存器中还包括反相器，所述反相器包括NMOS晶体管T38和PMOS晶体管T37；
T37、T38的栅极连接所述与非门电路的输出端，T37的源极连接高电平信号线，T38的源极连接低电平信号线，T37、T38的漏极相连，且作为所述移位寄存器的输出端。
进一步的是，所述移位寄存器中还包括正反向选择电路。
优选的是，所述正反向选择电路包括NMOS晶体管T1、T3，及PMOS晶体管T0、T2：
T1、T2的栅极连接正向扫描信号线，T0、T3的栅极连接反向扫描信号线；
T0、T1的源极连接前一级移位寄存器的输出端或正向触发信号线，T2、T3的源极连接后一级移位寄存器的输出端或反向触发信号线；
T0、T1、T2、T3的漏极相连，且作为所述正反向选择电路的输出端。
进一步的是，所述第一输出器连接有第一次级时钟信号线，所述第二输出器连接有第二次级时钟信号线；
在所述第一扫描周期中，所述第一次级时钟信号线输出高电平；
在所述第二扫描周期中，所述第二次级时钟信号线输出高电平。
进一步的是，所述第一输出器中包括与非门电路和缓存器；
在所述第一扫描周期中，所述与非门电路对所述第一次级时钟信号线输出的高电平和所述初级驱动信号进行与非运算，输出低电平；
所述缓存器接收所述低电平，并向第一栅线输出栅极驱动信号。
优选的是，所述与非门电路包括NMOS晶体管T21、T22，及PMOS晶体管T19、 T20；
T19、T21的栅极连接所述第一次级时钟信号线，T20、T22的栅极连接所述移位寄存器的输出端；
T22的源极连接低电平信号线，T22的漏极连接T21的源极，T21的漏极作为所述与非门电路的输出端；
T19、T20的源极连接高电平信号线，T19、T20的漏极连接T21的漏极；
所述缓存器包括NMOS晶体管T18、T24、T26，及PMOS晶体管T17、T23、T25；
T17、T18的栅极连接所述与非门电路的输出端，T17、T18的漏极连接T23、T24的栅极，T23、T24的漏极连接T25、T26的栅极，T25、T26的漏极连接所述第一栅线；
T17、T23、T25的源极连接高电平信号线，T18、T24、T26的源极连接低电平信号线。
进一步的是，所述第二输出器中包括与非门电路和缓存器；
在所述第二扫描周期中，所述与非门电路对所述第二次级时钟信号线输出的高电平和所述初级驱动信号进行与非运算，输出低电平；
所述缓存器接收所述低电平，并向第二栅线输出栅极驱动信号。
优选的是，所述与非门电路包括NMOS晶体管T29、T30，及PMOS晶体管T27、T28；
T27、T29的栅极连接所述第二次级时钟信号线，T28、T30的栅极连接所述移位寄存器的输出端；
T30的源极连接低电平信号线，T30的漏极连接T29的源极，T29的漏极作为所述与非门电路的输出端；
T27、T28的源极连接高电平信号线，T27、T28的漏极连接T29的漏极；
所述缓存器包括NMOS晶体管T32、T34、T36，及PMOS晶体管T31、T33、T35；
T31、T32的栅极连接所述与非门电路的输出端，T31、T32的漏极连接T33、T34的栅极，T33、T34的漏极连接T35、T36的栅极，T35、T36的漏极连接所述第二栅线；
T31、T33、T35的源极连接高电平信号线，T32、T34、T36的源极连接低电平信号线。
优选的是，所述栅极驱动电路为GOA栅极驱动电路。
本发明还提供一种显示装置，包括若干级联的上述的栅极驱动电路，所述显示装置采用交错驱动方式进行显示。
本发明带来了以下有益效果：本发明提供的栅极驱动电路中，移位寄存器能够在连续的两个扫描周期中输出初级驱动信号，在初级驱动信号的驱动下，第一输出器和第二输出器能够各自向相应的栅线输出栅极驱动信号。因此，利用一个本发明提供的栅极驱动电路能够驱动两条栅线，相比于现有技术中一个栅极驱动电路驱动一条栅线的技术方案，本发明显著减少了栅极驱动电路的数量，从而能够减小阵列基板的边框区域的GOA电路的宽度，进而减小了显示装置的边框宽度。
本发明的其它特征和优点将在随后的说明书中阐述，并且，部分地从说明书中变得显而易见，或者通过实施本发明而了解。本发明的目的和其他优点可通过在说明书、权利要求书以及附图中所特别指出的结构来实现和获得。
附图说明
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例描述中所需要的附图做简单的介绍：
图1是本发明实施例一提供的栅极驱动电路的示意图；
图2是本发明实施例二提供的显示装置的示意图；
图3是图2中左侧的栅极驱动电路的示意图；
图4是图2中右侧的栅极驱动电路的示意图；
图5是图3中任一栅极驱动电路的示意图；
图6是图4中任一栅极驱动电路的示意图；
图7是本发明实施例二提供的显示装置的信号时序图。
具体实施方式
以下将结合附图及实施例来详细说明本发明的实施方式，借此对本发明如何应用技术手段来解决技术问题，并达成技术效果的实现过程能充分理解并据以实施。需要说明的是，只要不构成冲突，本发明中的各个实施例以及各实施例中的各个特征可以相互结合，所形 成的技术方案均在本发明的保护范围之内。
实施例一：
如图1所示，本发明实施例提供一种栅极驱动电路，可以利用GOA技术制作在阵列基板的外围区域。该栅极驱动电路包括移位寄存器、第一输出器和第二输出器。
在连续的第一扫描周期和第二扫描周期中，移位寄存器向第一输出器和第二输出器输出初级驱动信号。
在第一扫描周期中，第一输出器在初级驱动信号的驱动下，向第一栅线输出栅极驱动信号。在第二扫描周期中，第二输出器在初级驱动信号的驱动下，向第二栅线输出栅极驱动信号。
本发明实施例提供的栅极驱动电路中，移位寄存器能够在连续的两个扫描周期中输出初级驱动信号，在初级驱动信号的驱动下，第一输出器和第二输出器能够各自向相应的栅线输出栅极驱动信号。因此，利用一个本发明实施例提供的栅极驱动电路能够驱动两条栅线，相比于现有技术中一个栅极驱动电路驱动一条栅线的技术方案，本发明实施例显著减少了栅极驱动电路的数量，从而能够减小阵列基板的边框区域的GOA电路的宽度，进而减小了显示装置的边框宽度。
实施例二：
本发明实施例提供一种显示装置，可以是液晶显示器、OLED显示器等主动式显示装置，本实施例以手机的显示屏为例进行说明。如图2所示，该显示屏的阵列基板的中间为显示区域10，显示区域两侧为边框区域20，即GOA区域。
在边框区域中，形成有若干级联的上述实施例一提供的栅极驱动电路，用于驱动显示区域10中的栅线。并且，本实施例中采用交错(Interlace)驱动方式进行显示，从而将所有的栅极驱动电路均分在显示区域10两侧，以减小单侧边框区域20的宽度。
本实施例中，显示屏的分辨率为1920×1080，图3和图4分别为图2中左侧边框区域20和右侧边框区域20中的各个栅极驱动电路的级联示意图，可以看出该显示屏共设置有1920条栅线。
图5为图3中任一栅极驱动电路具体的电路图，图6为图4中任一栅极驱动电路具体的电路图。本实施例中的栅极驱动电路采用CMOS工艺制成，利用低温多晶硅(Low Temperature Poly-silicon，简称LTPS)的超高载流子迁移率的特性，可以在制作包括NMOS (例如晶体管T1、T3)和PMOS(例如晶体管T0、T2)的栅极驱动电路。
如图5所示，栅极驱动电路由移位寄存器、第一输出器和第二输出器组成。移位寄存器中主要包括锁存器和与非门电路。VGH为高电平信号线，VGL为低电平信号线。此外，锁存器连接有第一初级时钟信号线，与非门电路连接有第二初级时钟信号线。例如，在图3中的第一个栅极驱动电路中，锁存器连接CK1_1，与非门电路连接CK1_3(如图5)；又如，在图3中的第二个栅极驱动电路中，则是锁存器连接CK1_3，与非门电路连接CK1_1。CK1_1和CK1_3均输出脉冲信号(参照图7)，且二者的相位差为180°。
如图5所示，本实施例中，锁存器包括NMOS晶体管T9、T10、T11、T12、T13、T14，及PMOS晶体管T4、T5、T7、T8、T15、T16。其中，T7、T10、T13、T15的栅极连接CK1_1，T4、T9的栅极连接第一触发信号端Q(N-1)，T8、T12的栅极连接锁存器的输出端。T13的源极连接VGL，T15的源极连接VGH，T13、T15的漏极与T5、T11的栅极连接。T4、T8的源极连接VGH，T4的漏极连接T5的源极，T8的漏极连接T7的源极。T9、T12的源极连接VGL，T9的漏极连接T10的源极，T12的漏极连接T11的源极。T5、T7、T10、T11的漏极与T14、T16的栅极连接于P点。T14的源极连接VGL，T16的源极连接VGH，T14、T16的漏极相连，且作为锁存器的输出端。
此外，锁存器还包括PMOS晶体管T6。T6的栅极连接复位信号线Reset，T6的源极连接VGH，T6的漏极连接T14、T16的栅极，即P点。
如图5所示，本实施例中，移位寄存器中的与非门电路包括NMOS晶体管T41、T42，及PMOS晶体管T39、T40。T39、T41的栅极连接CK1_3，T40、T42的栅极连接锁存器的输出端。T42的源极连接VGL，T42的漏极连接T41的源极，T41的漏极作为与非门电路的输出端。T39、T40的源极连接VGH，T39、T40的漏极连接T41的漏极。
进一步的是，移位寄存器中还包括设置于与非门电路之后的反相器，该反相器包括NMOS晶体管T38和PMOS晶体管T37。T37、T38的栅极连接与非门电路的输出端，T37的源极连接VGH，T38的源极连接VGL，T37、T38的漏极相连，且作为移位寄存器的输出端。
进一步的是，移位寄存器中还包括正反向选择电路。通过正向扫描信号线U2D和反向扫描信号线D2U输出不同的高、低电平，正反向选择电路能够选择性的接收来自上一级栅极驱动电路或来自下一级栅极驱动电路的第一触发信号，从而实现从上至下(正向扫描)和从下至上(反相扫描)两种扫描方式。
具体的，正反向选择电路包括NMOS晶体管T1、T3，及PMOS晶体管T0、T2。T1、T2的栅极连接U2D，T0、T3的栅极连接D2U。T0、T1的源极连接前一级移位寄存器的输出端(如果是第一级移位寄存器则连接正向触发信号线STVF)，T2、T3的源极连接后一级移位寄存器的输出端(如果是最后一级移位寄存器则连接STVR反向触发信号线)。T0、T1、T2、T3的漏极相连，且作为正反向选择电路的输出端。
本实施例中，第一输出器中包括与非门电路和缓存器。
第一输出器中的与非门电路包括NMOS晶体管T21、T22，及PMOS晶体管T19、T20。T19、T21的栅极连接第一次级时钟信号线CK2_1，T20、T22的栅极连接移位寄存器的输出端。T22的源极连接VGL，T22的漏极连接T21的源极，T21的漏极作为与非门电路的输出端。T19、T20的源极连接VGH，T19、T20的漏极连接T21的漏极。
第一输出器中的缓存器包括NMOS晶体管T18、T24、T26，及PMOS晶体管T17、T23、T25。T17、T18的栅极连接与非门电路的输出端，T17、T18的漏极连接T23、T24的栅极，T23、T24的漏极连接T25、T26的栅极，T25、T26的漏极连接栅线gn。T17、T23、T25的源极连接VGH，T18、T24、T26的源极连接VGL。
本实施例中，第二输出器中也包括与非门电路和缓存器。
第二输出器中的与非门电路包括NMOS晶体管T29、T30，及PMOS晶体管T27、T28。T27、T29的栅极连接第二次级时钟信号线CK2_2，T28、T30的栅极连接移位寄存器的输出端。T30的源极连接VGL，T30的漏极连接T29的源极，T29的漏极作为与非门电路的输出端。T27、T28的源极连接VGH，T27、T28的漏极连接T29的漏极。
第二输出器中的缓存器包括NMOS晶体管T32、T34、T36，及PMOS晶体管T31、T33、T35。T31、T32的栅极连接与非门电路的输出端，T31、T32的漏极连接T33、T34的栅极，T33、T34的漏极连接T35、T36的栅极，T35、T36的漏极连接栅线gn+1。T31、T33、T35的源极连接VGH，T32、T34、T36的源极连接VGL。
如图6所示，栅极驱动电路由移位寄存器、第一输出器、第二输出器和正反向选择电路组成，其中的具体电路与图5中基本相同。其不同点在于，锁存器连接有第三初级时钟信号线，与非门电路连接有第四初级时钟信号线。例如，在图4中的第一个栅极驱动电路中，锁存器连接CK1_2，与非门电路连接CK1_4(如图6)；又如，在图4中的第二个栅极驱动电路中，则是锁存器连接CK1_4，与非门电路连接CK1_2。CK1_2和CK1_4均 输出脉冲信号(参照图7)，且二者的相位差为180°。第一输出器和第二输出器中均包括与非门电路和缓存器，其中的具体器件也与图5中基本相同。其不同点在于，第一输出器连接有第三次级时钟信号线CK2_3，第二输出器连接有第四次级时钟信号线CK2_4。
本实施例提供的显示装置的工作过程如下：
如图7所示，本实施例以正向扫描为例，U2D始终输出高电平，D2U始终输出低电平，则每个移位寄存器中的T0和T1导通，T2和T3关断。
Reset首先输出低电平脉冲，使各个移位寄存器中的T6全部导通，则P点为高电平，再经T14和T16组成的反相器之后，使各个移位寄存器中的第二触发信号Q(N)均保持为低电平。
首先由STVF向左侧(和右侧)第一个移位寄存器输出第一触发信号Q(0)，使锁存器中的T9导通，当CK1_1输出高电平时，锁存器中的T10也导通，使P点为低电平，再经T14和T16组成的反相器之后，输出第二触发信号Q(1)。如果是反相扫描，则由STVR输出第一触发信号。
然后，在第一扫描周期t1和第二扫描周期t2中，CK1_1输出低电平，CK1_3输出高电平。CK1_1输出的低电平经由T13和T15组成的反相器之后，使锁存器中的T11导通，同时Q(1)使锁存器中的T12导通，则P点能够保持为低电平，使Q(1)得以持续输出。同时，在移位寄存器中的与非门电路中，T41和T42同时导通，即CK1_3和Q(1)进行与非运算，输出低电平，再经过由T37和T38组成的反相器之后，输出初级驱动信号G(1)。而在其他时刻，CK1_3和G(1)中均至少有一个为低电平，使T39和T40至少有一个导通，且T41和T42不能同时导通，则CK1_3和Q(1)进行与非运算之后输出高电平，因此不能输出G(1)。
另一方面，此时的Q(1)还输入至第二个移位寄存器中，并作为第二个移位寄存器的第一触发信号。
在t1中，CK2_1输出高电平。第一输出器中的与非门电路中，T21和T22同时导通，即CK2_1和G(1)进行与非运算，输出低电平。缓存器接收该低电平，并向第一条栅线g1输出高电平的栅极驱动信号。
在t2中，CK2_2输出高电平。第二输出器中的与非门电路中，T29和T30同时导通，即CK2_2和G(1)进行与非运算，输出低电平。缓存器接收该低电平，并向第二条栅线 g2输出高电平的栅极驱动信号。
在第三扫描周期t3和第四扫描周期t4中，CK1_3为低电平，移位寄存器不再输出G(1)，则该栅极驱动电路向g1和g2输出低电平。
在之后的各个扫描周期中，Q(1)和Q(0)始终为低电平，使T4和T8导通；又因为T5和T7中必然有一个导通(CK1_1为高电平时，T5导通，CK1_1为低电平时，T7导通)，所以锁存器能够将P点锁定为高电平，从而不会再输出Q(1)，以保持g1和g2的低电平。
在第五扫描周期t5和第六扫描周期t6中，第二个栅极驱动电路分别向第五条栅线g5和第六条栅线g6输出栅极驱动信号。以此类推，即可实现所有栅线的驱动。
显示区域右侧的各个栅极驱动电路的工作过程与左侧相同，只是在时序上延后两个扫描周期，因此不再赘述。
本发明实施例提供的显示装置采用GOA技术，可利用CMOS工艺将各级栅极驱动电路制作在阵列基板的边框区域。本发明实施例中，一个栅极驱动电路能够驱动两条栅线，并且配合交错驱动的方式，将栅极驱动电路均分在显示区域两侧，因此一个栅极驱动电路在长度方向上的可用尺寸与4条栅线相当。相比于现有技术中一个栅极驱动电路驱动一条栅线的技术方案，本发明实施例中栅极驱动电路在长度方向上的尺寸增加为原来的4倍，则在宽度方向上可以减小为原来的1/4，从而显著减小了阵列基板的边框区域的GOA电路的宽度，进而减小了显示装置的边框宽度。
虽然本发明所公开的实施方式如上，但所述的内容只是为了便于理解本发明而采用的实施方式，并非用以限定本发明。任何本发明所属技术领域内的技术人员，在不脱离本发明所公开的精神和范围的前提下，可以在实施的形式上及细节上作任何的修改与变化，但本发明的专利保护范围，仍须以所附的权利要求书所界定的范围为准。

Claims (15)

  1. 一种栅极驱动电路，包括移位寄存器、第一输出器和第二输出器；
    在连续的第一扫描周期和第二扫描周期中，所述移位寄存器向所述第一输出器和所述第二输出器输出初级驱动信号；
    在所述第一扫描周期中，所述第一输出器在所述初级驱动信号的驱动下，向第一栅线输出栅极驱动信号；
    在所述第二扫描周期中，所述第二输出器在所述初级驱动信号的驱动下，向第二栅线输出栅极驱动信号。
  2. 根据权利要求1所述的栅极驱动电路，其中，所述移位寄存器中包括锁存器和与非门电路；
    在所述第一扫描周期和所述第二扫描周期之前，所述锁存器接收第一触发信号，并输出第二触发信号；
    在所述第一扫描周期和所述第二扫描周期中，所述锁存器持续输出所述第二触发信号，所述与非门电路在所述第二触发信号的驱动下输出所述初级驱动信号。
  3. 根据权利要求2所述的栅极驱动电路，其中，所述锁存器连接有第一初级时钟信号线，所述与非门电路连接有第二初级时钟信号线；
    所述第一初级时钟信号线和所述第二初级时钟信号线均输出脉冲信号，且二者的相位差为180°。
  4. 根据权利要求3所述的栅极驱动电路，其中，所述锁存器包括NMOS晶体管T9、T10、T11、T12、T13、T14，及PMOS晶体管T4、T5、T7、T8、T15、T16；
    T7、T10、T13、T15的栅极连接所述第一初级时钟信号线，T4、T9的栅极连接第一触发信号端，T8、T12的栅极连接所述锁存器的输出端；
    T13的源极连接低电平信号线，T15的源极连接高电平信号线，T13、T15的漏极与T5、T11的栅极连接；
    T4、T8的源极连接高电平信号线，T4的漏极连接T5的源极，T8的漏极连接T7的源极；
    T9、T12的源极连接低电平信号线，T9的漏极连接T10的源极，T12的漏极连接T11 的源极；
    T5、T7、T10、T11的漏极与T14、T16的栅极连接；
    T14的源极连接低电平信号线，T16的源极连接高电平信号线，T14、T16的漏极相连，且作为所述锁存器的输出端。
  5. 根据权利要求3所述的栅极驱动电路，其中，所述与非门电路包括NMOS晶体管T41、T42，及PMOS晶体管T39、T40；
    T39、T41的栅极连接所述第二初级时钟信号线，T40、T42的栅极连接所述锁存器的输出端；
    T42的源极连接低电平信号线，T42的漏极连接T41的源极，T41的漏极作为所述与非门电路的输出端；
    T39、T40的源极连接高电平信号线，T39、T40的漏极连接T41的漏极。
  6. 根据权利要求5所述的栅极驱动电路，其中，所述移位寄存器中还包括反相器，所述反相器包括NMOS晶体管T38和PMOS晶体管T37；
    T37、T38的栅极连接所述与非门电路的输出端，T37的源极连接高电平信号线，T38的源极连接低电平信号线，T37、T38的漏极相连，且作为所述移位寄存器的输出端。
  7. 根据权利要求2所述的栅极驱动电路，其中，所述移位寄存器中还包括正反向选择电路。
  8. 根据权利要求7所述的栅极驱动电路，其中，所述正反向选择电路包括NMOS晶体管T1、T3，及PMOS晶体管T0、T2；
    T1、T2的栅极连接正向扫描信号线，T0、T3的栅极连接反向扫描信号线；
    T0、T1的源极连接前一级移位寄存器的输出端或正向触发信号线，T2、T3的源极连接后一级移位寄存器的输出端或反向触发信号线；
    T0、T1、T2、T3的漏极相连，且作为所述正反向选择电路的输出端。
  9. 根据权利要求1所述的栅极驱动电路，其中，所述第一输出器连接有第一次级时钟信号线，所述第二输出器连接有第二次级时钟信号线；
    在所述第一扫描周期中，所述第一次级时钟信号线输出高电平；
    在所述第二扫描周期中，所述第二次级时钟信号线输出高电平。
  10. 根据权利要求9所述的栅极驱动电路，其中，所述第一输出器中包括与非门电路和缓存器；
    在所述第一扫描周期中，所述与非门电路对所述第一次级时钟信号线输出的高电平和所述初级驱动信号进行与非运算，输出低电平；
    所述缓存器接收所述低电平，并向第一栅线输出栅极驱动信号。
  11. 根据权利要求10所述的栅极驱动电路，其中，所述与非门电路包括NMOS晶体管T21、T22，及PMOS晶体管T19、T20；
    T19、T21的栅极连接所述第一次级时钟信号线，T20、T22的栅极连接所述移位寄存器的输出端；
    T22的源极连接低电平信号线，T22的漏极连接T21的源极，T21的漏极作为所述与非门电路的输出端；
    T19、T20的源极连接高电平信号线，T19、T20的漏极连接T21的漏极；
    所述缓存器包括NMOS晶体管T18、T24、T26，及PMOS晶体管T17、T23、T25；
    T17、T18的栅极连接所述与非门电路的输出端，T17、T18的漏极连接T23、T24的栅极，T23、T24的漏极连接T25、T26的栅极，T25、T26的漏极连接所述第一栅线；
    T17、T23、T25的源极连接高电平信号线，T18、T24、T26的源极连接低电平信号线。
  12. 根据权利要求9所述的栅极驱动电路，其中，所述第二输出器中包括与非门电路和缓存器；
    在所述第二扫描周期中，所述与非门电路对所述第二次级时钟信号线输出的高电平和所述初级驱动信号进行与非运算，输出低电平；
    所述缓存器接收所述低电平，并向第二栅线输出栅极驱动信号。
  13. 根据权利要求12所述的栅极驱动电路，其中，所述与非门电路包括NMOS晶体管T29、T30，及PMOS晶体管T27、T28；
    T27、T29的栅极连接所述第二次级时钟信号线，T28、T30的栅极连接所述移位寄存器的输出端；
    T30的源极连接低电平信号线，T30的漏极连接T29的源极，T29的漏极作为所述与 非门电路的输出端；
    T27、T28的源极连接高电平信号线，T27、T28的漏极连接T29的漏极；
    所述缓存器包括NMOS晶体管T32、T34、T36，及PMOS晶体管T31、T33、T35；
    T31、T32的栅极连接所述与非门电路的输出端，T31、T32的漏极连接T33、T34的栅极，T33、T34的漏极连接T35、T36的栅极，T35、T36的漏极连接所述第二栅线；
    T31、T33、T35的源极连接高电平信号线，T32、T34、T36的源极连接低电平信号线。
  14. 根据权利要求1所述的栅极驱动电路，其中，所述栅极驱动电路为GOA栅极驱动电路。
  15. 一种显示装置，包括若干级联的栅极驱动电路，所述显示装置采用交错驱动方式进行显示；
    所述栅极驱动电路包括移位寄存器、第一输出器和第二输出器；
    在连续的第一扫描周期和第二扫描周期中，所述移位寄存器向所述第一输出器和所述第二输出器输出初级驱动信号；
    在所述第一扫描周期中，所述第一输出器在所述初级驱动信号的驱动下，向第一栅线输出栅极驱动信号；
    在所述第二扫描周期中，所述第二输出器在所述初级驱动信号的驱动下，向第二栅线输出栅极驱动信号。
PCT/CN2015/075840 2015-03-17 2015-04-03 栅极驱动电路及显示装置 Ceased WO2016145691A1 (zh)

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