WO2020155920A1 - 移位寄存器及其驱动方法、栅极驱动电路和显示装置 - Google Patents

移位寄存器及其驱动方法、栅极驱动电路和显示装置 Download PDF

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Publication number
WO2020155920A1
WO2020155920A1 PCT/CN2019/127093 CN2019127093W WO2020155920A1 WO 2020155920 A1 WO2020155920 A1 WO 2020155920A1 CN 2019127093 W CN2019127093 W CN 2019127093W WO 2020155920 A1 WO2020155920 A1 WO 2020155920A1
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Prior art keywords
electrode
pull
transistor
control
node
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PCT/CN2019/127093
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English (en)
French (fr)
Inventor
谢勇贤
王慧
吕凤珍
张然
罗慈龙
杨瑞英
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京东方科技集团股份有限公司
合肥鑫晟光电科技有限公司
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Priority to US16/969,648 priority Critical patent/US20200402438A1/en
Publication of WO2020155920A1 publication Critical patent/WO2020155920A1/zh

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    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11CSTATIC STORES
    • G11C19/00Digital stores in which the information is moved stepwise, e.g. shift registers
    • G11C19/28Digital stores in which the information is moved stepwise, e.g. shift registers using semiconductor elements
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00Aspects of the constitution of display devices
    • G09G2300/04Structural and physical details of display devices
    • G09G2300/0421Structural details of the set of electrodes
    • G09G2300/0426Layout of electrodes and connections
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00Aspects of the constitution of display devices
    • G09G2300/08Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00Command of the display device
    • G09G2310/02Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0243Details of the generation of driving signals
    • G09G2310/0259Details of the generation of driving signals with use of an analog or digital ramp generator in the column driver or in the pixel circuit
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00Command of the display device
    • G09G2310/02Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264Details of driving circuits
    • G09G2310/0267Details of drivers for scan electrodes, other than drivers for liquid crystal, plasma or OLED displays
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00Command of the display device
    • G09G2310/02Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264Details of driving circuits
    • G09G2310/0286Details of a shift registers arranged for use in a driving circuit
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00Command of the display device
    • G09G2310/08Details of timing specific for flat panels, other than clock recovery
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters

Definitions

  • the present disclosure relates to the display field, in particular to a shift register and a driving method thereof, a gate driving circuit and a display device.
  • GOA Gate On Array
  • Each GOA unit acts as a shift register to sequentially transfer the scan signal to the next GOA unit, turn on the switch of the thin film transistor substrate row by row, and complete the data signal input of the pixel unit.
  • the dual VDD DC GOA architecture has been widely used in traditional GOA products due to its stable noise reduction capability.
  • a shift register includes:
  • An input circuit connected to the signal input terminal and the pull-up node of the shift register, and is configured to transmit the input signal received by the signal input terminal to the pull-up node;
  • An output circuit connected to the first signal output terminal and the clock signal terminal, and is configured to transmit the clock signal received at the clock signal terminal to the first signal output terminal in response to the potential of the pull-up node;
  • the reset circuit is connected to the first reset signal terminal, the reference signal terminal and the pull-up node, and is configured to convert the reference signal of the reference signal terminal under the control of the first reset signal received by the first reset signal terminal Transmitted to the pull-up node;
  • the control circuit connected to the pull-up node, the reference signal terminal, the first power signal terminal, the second power signal terminal, the first control signal terminal, and the second control signal terminal, is configured to respond to the pull-up node Potential, under the control of the first control signal received by the first control signal terminal and the second control signal received by the second control signal terminal, the reference signal received by the reference signal terminal is transmitted to the first pull-down of the shift register Node and/or second drop-down node;
  • a pull-down circuit connected to the first pull-down node and the second pull-down node, and is configured to transmit the reference signal of the reference signal terminal to the pull-up node in response to the potentials of the first pull-down node and the second pull-down node node.
  • control circuit includes:
  • the first control sub-circuit is connected to the first power signal terminal, the pull-up node, and the first pull-down node, and is configured to respond to the potential of the pull-up node based on the first power supply The first power signal received by the signal terminal to control the potential of the first pull-down node;
  • the second control sub-circuit is connected to the second power signal terminal, the pull-up node, and the second pull-down node, and is configured to respond to the potential of the pull-up node based on the second power signal The second power signal received by the terminal to control the potential of the second pull-down node;
  • the adjustment sub-circuit is connected to the first control signal terminal, the second control signal terminal, the first pull-down node, the second pull-down node, and the reference signal terminal, and is configured to The reference signal received by the reference signal end is transmitted to the first pull-down node under the control of the first control signal received by the first control signal end, and the second control signal received at the second control signal end Transmitting the reference signal received by the reference signal terminal to the second pull-down node under control.
  • the adjustment circuit includes:
  • a ninth transistor the control electrode of the ninth transistor is connected to the first control signal terminal, the first electrode is connected to the first pull-down node, and the second electrode is connected to the reference signal terminal;
  • a tenth transistor the control electrode of the tenth transistor is connected to the second control signal terminal, the first electrode is connected to the second pull-down node, and the second electrode is connected to the reference signal terminal.
  • the first control signal terminal is connected to the second power signal terminal, and the second control signal terminal is connected to the first power signal terminal.
  • the first control signal terminal is connected to the second control signal terminal.
  • the first control sub-circuit includes a fifth transistor and a sixth transistor
  • the second control sub-circuit includes a fifth corresponding transistor and a sixth corresponding transistor
  • the control electrode of the fifth transistor is connected to the first power signal terminal, the first electrode is connected to the first power signal terminal, and the second electrode is connected to the first pull-down node;
  • the control electrode of the fifth corresponding transistor is connected to the second power signal terminal, the first electrode is connected to the second power signal terminal, and the second electrode is connected to the second pull-down node;
  • the control electrode of the sixth transistor is connected to the pull-up node, the first electrode is connected to the first pull-down node, and the second electrode is connected to the reference signal terminal;
  • the control electrode of the sixth corresponding transistor is connected to the pull-up node, the first electrode is connected to the second pull-down node, and the second electrode is connected to the reference signal terminal.
  • the first control sub-circuit includes a fifth transistor, a sixth transistor, an eleventh transistor, and a twelfth transistor
  • the second control sub-circuit includes a fifth corresponding transistor, a sixth corresponding transistor, The eleventh corresponding transistor and the twelfth corresponding transistor; among them,
  • the control electrode of the fifth transistor is connected to the first power signal terminal, the first electrode is connected to the first power signal terminal, and the second electrode is connected to the first electrode of the sixth transistor;
  • the control electrode of the fifth corresponding transistor is connected to the second power signal terminal, the first electrode is connected to the second power signal terminal, and the second electrode is connected to the first electrode of the sixth corresponding transistor;
  • the control electrode of the sixth transistor is connected to the pull-up node, the first electrode is connected to the second electrode of the fifth transistor, and the second electrode is connected to the reference signal terminal;
  • the control electrode of the sixth corresponding transistor is connected to the pull-up node, the first electrode is connected to the second electrode of the fifth corresponding transistor, and the second electrode is connected to the reference signal terminal;
  • the control electrode of the eleventh transistor is connected to the second electrode of the fifth transistor, the first electrode is connected to the first power signal terminal, and the second electrode is connected to the first pull-down node;
  • the control electrode of the eleventh corresponding transistor is connected to the second electrode of the fifth corresponding transistor, the first electrode is connected to the second power signal terminal, and the second electrode is connected to the second pull-down node;
  • the control electrode of the twelfth transistor is connected to the pull-up node, the first electrode is connected to the first pull-down node, and the second electrode is connected to the reference signal terminal;
  • the control electrode of the twelfth corresponding transistor is connected to the pull-up node, the first electrode is connected to the second pull-down node, and the second electrode is connected to the reference signal terminal.
  • the pull-down circuit includes a seventh transistor, a seventh corresponding transistor, an eighth transistor, and an eighth corresponding transistor; wherein,
  • the control electrode of the seventh transistor is connected to the first pull-down node, the first electrode is connected to the pull-up node, and the second electrode is connected to the reference signal terminal;
  • the control electrode of the seventh corresponding transistor is connected to the second pull-down node, the first electrode is connected to the pull-up node, and the second electrode is connected to the reference signal terminal;
  • the control electrode of the eighth transistor is connected to the first pull-down node, the first electrode is connected to the first signal output terminal, and the second electrode is connected to the reference signal terminal;
  • the control electrode of the eighth corresponding transistor is connected to the second pull-down node, the first electrode is connected to the first signal output terminal, and the second electrode is connected to the reference signal terminal.
  • the pull-down circuit includes a seventh transistor, a seventh corresponding transistor, an eighth transistor, an eighth corresponding transistor, a sixteenth transistor, and a sixteenth corresponding transistor; wherein,
  • the control electrode of the seventh transistor is connected to the first pull-down node, the first electrode is connected to the pull-up node, and the second electrode is connected to the reference signal terminal;
  • the control electrode of the seventh corresponding transistor is connected to the second pull-down node, the first electrode is connected to the pull-up node, and the second electrode is connected to the reference signal terminal;
  • the control electrode of the eighth transistor is connected to the first pull-down node, the first electrode is connected to the first signal output terminal, and the second electrode is connected to the reference signal terminal;
  • the control electrode of the eighth corresponding transistor is connected to the second pull-down node, the first electrode is connected to the first signal output terminal, and the second electrode is connected to the reference signal terminal;
  • the control electrode of the sixteenth transistor is connected to the first pull-down node, the first electrode is connected to the second signal output terminal of the shift register unit, and the second electrode is connected to the reference signal terminal;
  • the control electrode of the sixteenth corresponding transistor is connected to the second pull-down node, the first electrode is connected to the second signal output terminal, and the second electrode is connected to the reference signal terminal.
  • the reset circuit includes a second transistor and a fourth transistor; wherein,
  • the control electrode of the second transistor is connected to the first reset signal terminal, the first electrode is connected to the pull-up node, and the second electrode is connected to the reference signal terminal;
  • the control electrode of the fourth transistor is connected to the first reset signal terminal, the first electrode is connected to the first signal output terminal, and the second electrode is connected to the reference signal terminal.
  • the reset circuit includes a second transistor, the control electrode of the second transistor is connected to the first reset signal terminal, the first electrode is connected to the pull-up node, and the second electrode is connected to the reference signal terminal.
  • the reset circuit includes a second transistor, a thirteenth transistor, and a fourteenth transistor;
  • the control electrode of the second transistor is connected to the first reset signal terminal, the first electrode is connected to the pull-up node, and the second electrode is connected to the reference signal terminal;
  • the control electrode of the thirteenth transistor is connected to the second reset signal terminal, the first electrode is connected to the pull-up node, and the second electrode is connected to the reference signal terminal;
  • the control electrode of the fourteenth transistor is connected to the second reset signal terminal, the first electrode is connected to the first signal output terminal, and the second electrode is connected to the reference signal terminal.
  • the reset circuit includes a second transistor and a thirteenth transistor
  • the control electrode of the second transistor is connected to the first reset signal terminal, the first electrode is connected to the pull-up node, and the second electrode is connected to the reference signal terminal;
  • the control electrode of the thirteenth transistor is connected to the second reset signal terminal, the first electrode is connected to the pull-up node, and the second electrode is connected to the reference signal terminal.
  • the input circuit includes a first transistor, the control electrode of the first transistor is connected to the signal input terminal, the first electrode is connected to the signal input terminal, and the second electrode is connected to the pull-up node.
  • the output circuit includes a third transistor and a capacitor
  • the control electrode of the third transistor is connected to the pull-up node, the first electrode is connected to the clock signal terminal, and the second electrode is connected to the first signal output terminal;
  • the first terminal of the capacitor is connected to the pull-up node, and the second terminal is connected to the first signal output terminal.
  • the output circuit includes a third transistor, a fifteenth transistor and a capacitor,
  • the control electrode of the third transistor is connected to the pull-up node, the first electrode is connected to the clock signal terminal, and the second electrode is connected to the first signal output terminal;
  • the control electrode of the fifteenth transistor is connected to the pull-up node, the first electrode is connected to the clock signal terminal, and the second electrode is connected to the second signal output terminal of the shift register;
  • the first terminal of the capacitor is connected to the pull-up node, and the second terminal is connected to the first signal output terminal.
  • a gate driving circuit including a plurality of the above shift registers connected in cascade.
  • a display device including the above-mentioned gate driving circuit.
  • the input circuit transmits the input signal received by the signal input terminal to the pull-up node
  • the output circuit transmits the clock signal received at the clock signal terminal to the first signal output terminal;
  • control circuit transmits the first level of the reference signal to the first pull-down node and/or the second pull-down node under the control of the first control signal and the second control signal;
  • the pull-down circuit transmits the reference signal of the reference signal terminal to the pull-up node
  • the reset circuit Under the control of the first reset signal received by the first reset signal terminal, the reset circuit transmits the reference signal of the reference signal terminal to the pull-up node.
  • the first control signal received by the first control signal terminal is the second power signal received by the second power signal terminal
  • the second control signal received by the second control signal terminal is received by the first power signal terminal The first power signal
  • the first control signal received by the first control signal terminal and the second control signal received by the second control signal terminal are both the third reset signal.
  • the effective level of the third reset signal appears before the start of each frame.
  • the effective level of the third reset signal appears in response to a transition of the first power signal or the second power signal.
  • Fig. 1(a) shows an example circuit diagram of a shift register according to the related art
  • Figure 1(b) shows a schematic block diagram of a shift register according to an embodiment of the present disclosure
  • Figure 1(c) shows a schematic block diagram of a shift register according to another embodiment of the present disclosure
  • Fig. 2 shows a schematic circuit diagram of a shift register according to an embodiment of the present disclosure
  • Fig. 3 shows a schematic circuit diagram of a shift register according to another embodiment of the present disclosure
  • Fig. 4 shows a schematic circuit diagram of a shift register according to another embodiment of the present disclosure
  • Fig. 5 shows a schematic circuit diagram of a shift register according to still another embodiment of the present disclosure
  • Fig. 6 shows a schematic flowchart of a driving method of a shift register according to an embodiment of the present disclosure
  • Fig. 7(a) shows a schematic operation timing diagram of the shift register in Fig. 1(a);
  • FIG. 7(b) shows a schematic operation timing diagram of the shift register in FIG. 2;
  • FIG. 7(c) shows another schematic operation timing diagram of the shift register in FIG. 2;
  • FIG. 7(d) shows another schematic operation timing diagram of the shift register in FIG. 2.
  • FIG. 8 shows a schematic block diagram of a display device according to an embodiment of the present disclosure.
  • connection may mean that two components are directly connected, or that two components are connected via one or more other components.
  • these two components can be connected or coupled by wired or wireless means.
  • first level and “second level” are only used to distinguish the two levels from being different in amplitude.
  • first level is a low level
  • second level is a high level as an example.
  • the transistors used in the embodiments of the present disclosure may all be thin film transistors or field effect transistors or other devices with the same characteristics.
  • the thin film transistor used in the embodiment of the present disclosure may be an oxide semiconductor transistor. Since the source and drain of the thin film transistor used here are symmetrical, the source and drain can be interchanged. In the embodiments of the present disclosure, one of the source electrode and the drain electrode is called a first electrode, and the other of the source electrode and the drain electrode is called a second electrode.
  • an N-type thin film transistor is taken as an example for description. Those skilled in the art can understand that the embodiments of the present disclosure can obviously be applied to the case of P-type thin film transistors.
  • FIG. 1(a) shows an example circuit diagram of a dual VDD DC GOA unit (ie, shift register) according to the related art.
  • the GOA unit includes two DC power signal terminals VDDe and VDDo, which are used to receive two power signals respectively.
  • One of the two power signals is at a high level and the other is at a low level.
  • the high-level voltage signal can provide a discharge signal for the GOA unit.
  • these two signals can be switched at predetermined time intervals (for example, once every two seconds) and the switching is set when the node PU is at a low level (in the case that the transistor is, for example, an N-type transistor). .
  • the transistor M5 When the power signal terminal VDDe changes from a high level to a low level and at the same time the power signal terminal VDDo changes from a low level to a high level, the transistor M5 is turned on, the transistor M5' is turned off, and the node PD2 leaks through the transistors M5' and M6' While it slowly drops to the level of the power signal VGL, in contrast, the node PD1 is pulled high quickly, as shown in the nodes PD1 and PD2 in the t1 period in FIG. 7(a).
  • the nodes PD1 and PD2 are both high, so that the transistors M7 and M7' are both turned on (however, the fact When the upper expected node PD1 is at a high level, the node PD2 is pulled down to the level of the power signal VGL, so that only one of the transistors M7 and M7' is turned on or both are turned off).
  • the discharge current through the transistors M7 and M7' is relatively large, which affects the charging of the node PU.
  • the power supply signal VDDo changes from a high level to a low level and the power supply signal VDDe changes from a low level to a high level, the same problem exists.
  • the shift register and the driving method thereof, the gate driving circuit, and the display device can enable at least one of the first pull-down node and the second pull-down node when the first power signal and the second power signal are switched
  • the node is reset to the level of the reference signal terminal faster than the conventional technology, thereby preventing the charging of the pull-up node from being affected by the slow discharge of one of the first pull-down node and the second pull-down node.
  • Fig. 1(b) shows a schematic block diagram of a shift register 100 according to an embodiment of the present disclosure.
  • the shift register 100 may include an input circuit 101.
  • the input circuit 101 may be connected to the signal input terminal INPUT and the pull-up node PU, and is configured to transmit the input signal received by the signal input terminal INPUT to the pull-up node PU.
  • the shift register 100 may include an output circuit 102.
  • the output circuit 102 may be connected to the first signal output terminal OUT and the clock signal terminal CLK, and is configured to transmit the clock signal received at the clock signal terminal CLK to the first signal output terminal OUT in response to the potential of the pull-up node PU.
  • the shift register 100 may include a control circuit 103.
  • the control circuit 103 may be connected to the pull-up node PU, the reference signal terminal VGL, the first power signal terminal VDDo, the second power signal terminal VDDe, the first control signal terminal CON1, and the second control signal terminal CON2, and is configured to respond to the upper Pull the potential of the node PU, under the control of the first control signal received by the first control signal terminal CON1 and the second control signal received by the second control signal terminal CON2, the reference signal received by the reference signal terminal VGL is transmitted to the first downstream Pull node PD1 and/or second pull node PD2.
  • the reference signal received at the reference signal terminal VGL may always be maintained at the first level, the first power signal received at the first power signal terminal VDDo and the second power signal received at the second power signal terminal VDDe
  • the signal may be a signal that switches between a first level and a second level, such as a periodic pulse signal. This makes that in the first period, the first power signal is at the first level and the second power signal is at the second level; and in the second period, the first power signal is at the second level, and the second power signal is at the first level. Level.
  • the first power signal and the second power signal may have the same period, the same amplitude but opposite phases.
  • the period of the first power signal and the second power signal may be, for example, 2 seconds, or any suitable time. According to the present disclosure, switching between two power supply signals means that while one power supply signal transitions from a first level to a second level, the other power supply signal transitions from the second level to the first level.
  • the first control signal terminal CON1 can be connected to the second power signal terminal VDDe, and the second control signal terminal CON2 can be connected to the first power signal terminal VDDo. This makes the first control signal received by the first control signal terminal CON1 the second power signal received by the second power signal terminal VDDe, and the second control signal received by the second control signal terminal CON2 is received by the first power signal terminal VDDo The first power signal.
  • the first control signal terminal CON1 and the second control signal terminal CON2 can be connected to receive the same signal (for example, the third reset signal), which makes the first control signal received by the first control signal terminal CON1 and the second control signal
  • the second control signals received by the two control signal terminals CON2 are all the third reset signals.
  • the third reset signal is used to reset the first pull-down node PD1 and the second pull-down node PD2, for example, pull it down to a low level.
  • the effective level of the third reset signal may appear before the start of each frame. In other embodiments, the effective level of the third reset signal may appear in response to a transition of the first power signal or the second power signal.
  • this allows the third reset signal to trigger the reset of the first pull-down node PD1 and the second pull-down node PD2 before the start of each frame, or it can respond to the transition of the first power signal or the second power signal (such as rising edge). Or falling edge) to trigger the reset of the first pull-down node PD1 and the second pull-down node PD2.
  • the period of the third reset signal may be the same as the period of the first power signal or the second power signal, or the period of the frame.
  • the shift register 100 may include a pull-down circuit 104.
  • the pull-down circuit 104 may be connected to the first pull-down node PD1 and the second pull-down node PD2, and is configured to transmit the reference signal of the reference signal terminal VGL to the upper side in response to the potentials of the first pull-down node PD1 and the second pull-down node PD2. Pull the node PU.
  • the shift register 100 may include a reset circuit 105.
  • the reset circuit 105 can be connected to the first reset signal terminal RESET, the reference signal terminal VGL and the pull-up node PU, and is configured to, under the control of the first reset signal received by the first reset signal terminal RESET, connect the reference signal terminal VGL The reference signal is transmitted to the pull-up node PU.
  • the shift register according to the present disclosure can enable at least one of the first pull-down node and the second pull-down node to be quickly reset to the level of the reference signal terminal (for example, the first power signal) and the second power signal are switched. Level), so as to avoid affecting the charging of the pull-up node due to the slow discharge of one of the first pull-down node and the second pull-down node.
  • Fig. 1(c) shows a schematic block diagram of a shift register according to another embodiment of the present disclosure.
  • the shift register 100' shown in FIG. 1(c) includes an input circuit 101', an output circuit 102', a control circuit 103', a pull-down circuit 104', and a reset circuit 105'.
  • the above description of the input circuit, output circuit, control circuit, pull-down circuit, and reset circuit with reference to FIG. 1(b) is also applicable to the shift register 100', and will not be repeated here.
  • the control circuit 103' includes a first control sub-circuit 1031, a second control sub-circuit 1032, and an adjustment sub-circuit 1033.
  • the first control sub-circuit 1031 is connected to the first power signal terminal VDDo, the pull-up node PU and the first pull-down node PD1.
  • the first control sub-circuit 1031 can control the potential of the first pull-down node PD1 based on the first power signal received by the first power signal terminal VDDo in response to the potential of the pull-up node PU.
  • the second control sub-circuit 1032 is connected to the second power signal terminal VDDe, the pull-up node PU and the second pull-down node PD2.
  • the second control sub-circuit 1032 can control the potential of the second pull-down node PD2 based on the second power signal received by the second power signal terminal VDDe in response to the potential of the pull-up node PU.
  • the adjustment sub-circuit 1033 is connected to the first control signal terminal CON1, the second control signal terminal CON2, the first pull-down node PD1, the second pull-down node PD2, and the reference signal terminal VGL.
  • the adjustment sub-circuit 1033 can transmit the reference signal received by the reference signal terminal VGL to the first pull-down node PD1 under the control of the first control signal received by the first control signal terminal CON1, and the second control signal terminal CON2 received at the second control signal terminal.
  • the reference signal received by the reference signal terminal VGL is transmitted to the second pull-down node PD2 under the control of the second control signal.
  • Fig. 2 shows a schematic circuit diagram of a shift register 200 according to an embodiment of the present disclosure.
  • the shift register 200 may include an input circuit 201.
  • the input circuit 201 may include a first transistor M1.
  • the control electrode of the first transistor M1 is connected to the signal input terminal INPUT, the first electrode is connected to the signal input terminal INPUT, and the second electrode is connected to the pull-up node PU.
  • the shift register 200 may also include an output circuit 202.
  • the output circuit 202 may include a third transistor M3 and a capacitor C1.
  • the control electrode of the third transistor M1 is connected to the pull-up node PU, the first electrode is connected to the clock signal terminal CLK, and the second electrode is connected to the first signal output terminal OUT.
  • the first terminal of the capacitor C1 is connected to the pull-up node PU, and the second terminal is connected to the first signal output terminal OUT.
  • the shift register 200 may further include a control circuit 203.
  • the control circuit 203 may include a first control sub-circuit, a second control sub-circuit and an adjustment sub-circuit.
  • the first control sub-circuit may include a fifth transistor M5, a fifth corresponding transistor M5', and a sixth transistor M6.
  • the second control sub-circuit may include a fifth corresponding transistor M5' and a sixth corresponding transistor M6'.
  • the adjustment sub-circuit may include a ninth transistor M9 and a tenth transistor M10.
  • the control electrode of the fifth transistor M5 is connected to the first power signal terminal VDDo
  • the first electrode is connected to the first power signal terminal VDDo
  • the second electrode is connected to the first pull-down node PD1.
  • the control electrode of the fifth corresponding transistor M5' is connected to the second power signal terminal VDDe, the first electrode is connected to the second power signal terminal VDDe, and the second electrode is connected to the second pull-down node PD2.
  • the control electrode of the sixth transistor M6 is connected to the pull-up node PU, the first electrode is connected to the first pull-down node PD1, and the second electrode is connected to the reference signal terminal VGL.
  • the control electrode of the sixth corresponding transistor M6' is connected to the pull-up node PD1, the first electrode is connected to the second pull-down node PD2, and the second electrode is connected to the reference signal terminal VGL.
  • the control electrode of the ninth transistor M9 is connected to the first control signal terminal CON1, the first electrode is connected to the first pull-down node PD1, and the second electrode is connected to the reference signal terminal VGL.
  • the control electrode of the tenth transistor M10 is connected to the second control signal terminal CON2, the first electrode is connected to the second pull-down node PD2, and the second electrode is connected to the reference signal terminal VGL.
  • the shift register 200 may also include a pull-down circuit 204.
  • the pull-down circuit 204 may include a seventh transistor M7, a seventh corresponding transistor M7', an eighth transistor M8, and an eighth corresponding transistor M8'.
  • the control electrode of the seventh transistor M7 is connected to the first pull-down node PD1, the first electrode is connected to the pull-up node PU, and the second electrode is connected to the reference signal terminal VGL.
  • the control electrode of the seventh corresponding transistor M7' is connected to the second pull-down node PD2, the first electrode is connected to the pull-up node PU, and the second electrode is connected to the reference signal terminal VGL.
  • the control electrode of the eighth transistor M8 is connected to the first pull-down node PD1, the first electrode is connected to the first signal output terminal OUT, and the second electrode is connected to the reference signal terminal VGL.
  • the control electrode of the eighth corresponding transistor M8' is connected to the second pull-down node PD2, the first electrode is connected to the first signal output terminal OUT, and the second electrode is connected to the reference signal terminal VGL.
  • the shift register 200 may also include a reset circuit 205.
  • the reset circuit 205 may include a second transistor M2 and a fourth transistor M4.
  • the control electrode of the second transistor M2 is connected to the first reset signal terminal RESET, the first electrode is connected to the pull-up node PU, and the second electrode is connected to the reference signal terminal VGL.
  • the control electrode of the fourth transistor M4 is connected to the first reset signal terminal RESET, the first electrode is connected to the first signal output terminal OUT, and the second electrode is connected to the reference signal terminal VGL.
  • FIG. 3 shows a schematic circuit diagram of a shift register 300 according to another embodiment of the present disclosure.
  • the shift register 300 may include an input circuit 301.
  • the input circuit 301 may include a first transistor M1.
  • the control electrode of the first transistor M1 is connected to the signal input terminal INPUT, the first electrode is connected to the signal input terminal INPUT, and the second electrode is connected to the pull-up node PU.
  • the shift register 300 may further include an output circuit 302.
  • the output circuit 302 may include a third transistor M3 and a capacitor C1.
  • the control electrode of the third transistor M1 is connected to the pull-up node PU, the first electrode is connected to the clock signal terminal CLK, and the second electrode is connected to the first signal output terminal OUT.
  • the first terminal of the capacitor C1 is connected to the pull-up node PU, and the second terminal is connected to the first signal output terminal OUT.
  • the shift register 300 may further include a control circuit 303.
  • the control circuit 303 may include a first control sub-circuit, a second control sub-circuit and an adjustment sub-circuit.
  • the first control sub-circuit may include a fifth transistor M5, a sixth transistor M6, an eleventh transistor M11, and a twelfth transistor M12.
  • the second control sub-circuit may include a fifth corresponding transistor M5', a sixth corresponding transistor M6', an eleventh corresponding transistor M11', and a twelfth corresponding transistor M12'.
  • the adjustment sub-circuit may include a ninth transistor M9 and a tenth transistor M10.
  • the control electrode of the fifth transistor M5 is connected to the first power signal terminal VDDo, the first electrode is connected to the first power signal terminal VDDo, and the second electrode is connected to the first electrode of the sixth transistor M6.
  • the control electrode of the fifth corresponding transistor M5' is connected to the second power signal terminal VDDe, the first electrode is connected to the second power signal terminal VDDe, and the second electrode is connected to the first electrode of the sixth corresponding transistor M6'.
  • the control electrode of the sixth transistor M6 is connected to the pull-up node PU, the first electrode is connected to the second electrode of the fifth transistor M5, and the second electrode is connected to the reference signal terminal VGL.
  • the control electrode of the sixth corresponding transistor M6' is connected to the pull-up node PU, the first electrode is connected to the second electrode of the fifth corresponding transistor M5', and the second electrode is connected to the reference signal terminal VGL.
  • the control electrode of the ninth transistor M9 is connected to the first control signal terminal CON1, the first electrode is connected to the first pull-down node PD1, and the second electrode is connected to the reference signal terminal VGL.
  • the control electrode of the tenth transistor M10 is connected to the second control signal terminal CON2, the first electrode is connected to the second pull-down node PD2, and the second electrode is connected to the reference signal terminal VGL.
  • the control electrode of the eleventh transistor M11 is connected to the second electrode of the fifth transistor M5, the first electrode is connected to the first power signal terminal VDDo, and the second electrode is connected to the first pull-down node PD1.
  • the control electrode of the eleventh corresponding transistor M11' is connected to the second electrode of the fifth corresponding transistor M5', the first electrode is connected to the second power signal terminal VDDe, and the second electrode is connected to the second pull-down node PD2.
  • the control electrode of the twelfth transistor M12 is connected to the pull-up node PU, the first electrode is connected to the first pull-down node PD1, and the second electrode is connected to the reference signal terminal VGL.
  • the control electrode of the twelfth corresponding transistor M12' is connected to the pull-up node PU, the first electrode is connected to the second pull-down node PD2, and the second electrode is connected to the reference signal terminal VGL.
  • the shift register 300 may also include a pull-down circuit 304.
  • the pull-down circuit 304 may include a seventh transistor M7, a seventh corresponding transistor M7', an eighth transistor M8, and an eighth corresponding transistor M8'.
  • the control electrode of the seventh transistor M7 is connected to the first pull-down node PD1, the first electrode is connected to the pull-up node PU, and the second electrode is connected to the reference signal terminal VGL.
  • the control electrode of the seventh corresponding transistor M7' is connected to the second pull-down node PD2, the first electrode is connected to the pull-up node PU, and the second electrode is connected to the reference signal terminal VGL.
  • the control electrode of the eighth transistor M8 is connected to the first pull-down node PD1, the first electrode is connected to the first signal output terminal OUT, and the second electrode is connected to the reference signal terminal VGL.
  • the control electrode of the eighth corresponding transistor M8' is connected to the second pull-down node PD2, the first electrode is connected to the first signal output terminal OUT, and the second electrode is connected to the reference signal terminal VGL.
  • the shift register 300 may also include a reset circuit 305.
  • the reset circuit 305 may include a second transistor M2.
  • the control electrode of the second transistor M2 is connected to the first reset signal terminal RESET, the first electrode is connected to the pull-up node PU, and the second electrode is connected to the reference signal terminal VGL.
  • FIG. 4 shows a schematic circuit diagram of a shift register 400 according to another embodiment of the present disclosure.
  • the shift register 400 may include an input circuit 401.
  • the input circuit 401 may include a first transistor M1.
  • the control electrode of the first transistor M1 is connected to the signal input terminal INPUT, the first electrode is connected to the signal input terminal INPUT, and the second electrode is connected to the pull-up node PU.
  • the shift register 400 may also include an output circuit 402.
  • the output circuit 402 may include a third transistor M3 and a capacitor C1.
  • the control electrode of the third transistor M1 is connected to the pull-up node PU, the first electrode is connected to the clock signal terminal CLK, and the second electrode is connected to the first signal output terminal OUT.
  • the first terminal of the capacitor C1 is connected to the pull-up node PU, and the second terminal is connected to the first signal output terminal OUT.
  • the shift register 400 may further include a control circuit 403.
  • the control circuit 403 may include a first control sub-circuit, a second control sub-circuit and an adjustment sub-circuit.
  • the first control sub-circuit may include a fifth transistor M5, a sixth transistor M6, an eleventh transistor M11, and a twelfth transistor M12.
  • the second control sub-circuit may include a fifth corresponding transistor M5', a sixth corresponding transistor M6', an eleventh corresponding transistor M11', and a twelfth corresponding transistor M12'.
  • the adjustment sub-circuit may include a ninth transistor M9 and a tenth transistor M10.
  • the control electrode of the fifth transistor M5 is connected to the first power signal terminal VDDo, the first electrode is connected to the first power signal terminal VDDo, and the second electrode is connected to the first electrode of the sixth transistor M6.
  • the control electrode of the fifth corresponding transistor M5' is connected to the second power signal terminal VDDe, the first electrode is connected to the second power signal terminal VDDe, and the second electrode is connected to the first electrode of the sixth corresponding transistor M6'.
  • the control electrode of the sixth transistor M6 is connected to the pull-up node PU, the first electrode is connected to the second electrode of the fifth transistor M5, and the second electrode is connected to the reference signal terminal VGL.
  • the control electrode of the sixth corresponding transistor M6' is connected to the pull-up node PU, the first electrode is connected to the second electrode of the fifth corresponding transistor M5', and the second electrode is connected to the reference signal terminal VGL.
  • the control electrode of the ninth transistor M9 is connected to the first control signal terminal CON1, the first electrode is connected to the first pull-down node PD1, and the second electrode is connected to the reference signal terminal VGL.
  • the control electrode of the tenth transistor M10 is connected to the second control signal terminal CON2, the first electrode is connected to the second pull-down node PD2, and the second electrode is connected to the reference signal terminal VGL.
  • the control electrode of the eleventh transistor M11 is connected to the second electrode of the fifth transistor M5, the first electrode is connected to the first power signal terminal VDDo, and the second electrode is connected to the first pull-down node PD1.
  • the control electrode of the eleventh corresponding transistor M11' is connected to the second electrode of the fifth corresponding transistor M5', the first electrode is connected to the second power signal terminal VDDe, and the second electrode is connected to the second pull-down node PD2.
  • the control electrode of the twelfth transistor M12 is connected to the pull-up node PU, the first electrode is connected to the first pull-down node PD1, and the second electrode is connected to the reference signal terminal VGL.
  • the control electrode of the twelfth corresponding transistor M12' is connected to the pull-up node PU, the first electrode is connected to the second pull-down node PD2, and the second electrode is connected to the reference signal terminal VGL.
  • the shift register 400 may also include a pull-down circuit 404.
  • the pull-down circuit 404 may include a seventh transistor M7, a seventh corresponding transistor M7', an eighth transistor M8, and an eighth corresponding transistor M8'.
  • the control electrode of the seventh transistor M7 is connected to the first pull-down node PD1, the first electrode is connected to the pull-up node PU, and the second electrode is connected to the reference signal terminal VGL.
  • the control electrode of the seventh corresponding transistor M7' is connected to the second pull-down node PD2, the first electrode is connected to the pull-up node PU, and the second electrode is connected to the reference signal terminal VGL.
  • the control electrode of the eighth transistor M8 is connected to the first pull-down node PD1, the first electrode is connected to the first signal output terminal OUT, and the second electrode is connected to the reference signal terminal VGL.
  • the control electrode of the eighth corresponding transistor M8' is connected to the second pull-down node PD2, the first electrode is connected to the first signal output terminal OUT, and the second electrode is connected to the reference signal terminal VGL.
  • the shift register 400 may also include a reset circuit 405.
  • the reset circuit 405 may include a second transistor M2, a thirteenth transistor M13, and a fourteenth transistor M14.
  • the control electrode of the second transistor M2 is connected to the first reset signal terminal RESET, the first electrode is connected to the pull-up node PU, and the second electrode is connected to the reference signal terminal VGL.
  • the control electrode of the thirteenth transistor M13 is connected to the second reset signal terminal TRESET, the first electrode is connected to the pull-up node PU and the second electrode is connected to the reference signal terminal VGL.
  • the control electrode of the fourteenth transistor M14 is connected to the second reset signal terminal TRESET, the first electrode is connected to the first signal output terminal OUT, and the second electrode is connected to the reference signal terminal VGL.
  • the second reset signal of the second reset signal terminal TRESET is used for shifting corresponding to all rows. Register noise reduction. Different from the second reset signal of the second reset signal terminal TRESET, the first reset signal of the first reset signal terminal RESET is used to pull up the node PU and the first signal of the shift register after the output of the shift register is completed. The output terminal OUT is pulled down to prevent the clock signal of the clock signal terminal CLK from being continuously output to the first signal output terminal OUT, thereby causing display confusion.
  • FIG. 5 shows a schematic circuit diagram of a shift register 500 according to another embodiment of the present disclosure.
  • the shift register 500 may include an input circuit 501.
  • the input circuit 501 may include a first transistor M1.
  • the control electrode of the first transistor M1 is connected to the signal input terminal INPUT, the first electrode is connected to the signal input terminal INPUT, and the second electrode is connected to the pull-up node PU.
  • the shift register 500 may also include an output circuit 502.
  • the output circuit 502 may include a third transistor M3, a fifteenth transistor M15, and a capacitor C1.
  • the control electrode of the third transistor M3 is connected to the pull-up node PU, the first electrode is connected to the clock signal terminal CLK, and the second electrode is connected to the first signal output terminal OUT.
  • the control electrode of the fifteenth transistor M15 is connected to the pull-up node PU, the first electrode is connected to the clock signal terminal CLK, and the second electrode is connected to the second signal output terminal OC.
  • the first terminal of the capacitor C1 is connected to the pull-up node PU, and the second terminal is connected to the first signal output terminal OUT.
  • the shift register 500 may further include a control circuit 503.
  • the control circuit 503 may include a first control sub-circuit, a second control sub-circuit and an adjustment sub-circuit.
  • the first control sub-circuit includes a fifth transistor M5, a sixth transistor M6, an eleventh transistor M11, and a twelfth transistor M12.
  • the second control sub-circuit includes a fifth corresponding transistor M5', a sixth corresponding transistor M6', an eleventh corresponding transistor M11', and a twelfth corresponding transistor M12'.
  • the adjustment sub-circuit includes a ninth transistor M9 and a tenth transistor M10.
  • the control electrode of the fifth transistor M5 is connected to the first power signal terminal VDDo, the first electrode is connected to the first power signal terminal VDDo, and the second electrode is connected to the first electrode of the sixth transistor M6.
  • the control electrode of the fifth corresponding transistor M5' is connected to the second power signal terminal VDDe, the first electrode is connected to the second power signal terminal VDDe, and the second electrode is connected to the first electrode of the sixth corresponding transistor M6'.
  • the control electrode of the sixth transistor M6 is connected to the pull-up node PU, the first electrode is connected to the second electrode of the fifth transistor M5, and the second electrode is connected to the reference signal terminal VGL.
  • the control electrode of the sixth corresponding transistor M6' is connected to the pull-up node PU, the first electrode is connected to the second electrode of the fifth corresponding transistor M5', and the second electrode is connected to the reference signal terminal VGL.
  • the control electrode of the ninth transistor M9 is connected to the first control signal terminal CON1, the first electrode is connected to the first pull-down node PD1, and the second electrode is connected to the reference signal terminal VGL.
  • the control electrode of the tenth transistor M10 is connected to the second control signal terminal CON2, the first electrode is connected to the second pull-down node PD2, and the second electrode is connected to the reference signal terminal VGL.
  • the control electrode of the eleventh transistor M11 is connected to the second electrode of the fifth transistor M5, the first electrode is connected to the first power signal terminal VDDo, and the second electrode is connected to the first pull-down node PD1.
  • the control electrode of the eleventh corresponding transistor M11' is connected to the second electrode of the fifth corresponding transistor M5', the first electrode is connected to the second power signal terminal VDDe, and the second electrode is connected to the second pull-down node PD2.
  • the control electrode of the twelfth transistor M12 is connected to the pull-up node PU, the first electrode is connected to the first pull-down node PD1, and the second electrode is connected to the reference signal terminal VGL.
  • the control electrode of the twelfth corresponding transistor M12' is connected to the pull-up node PU, the first electrode is connected to the second pull-down node PD2, and the second electrode is connected to the reference signal terminal VGL.
  • the shift register 500 may also include a pull-down circuit 504.
  • the pull-down circuit 504 may include a seventh transistor M7, a seventh corresponding transistor M7', an eighth transistor M8, an eighth corresponding transistor M8', a sixteenth transistor M16, and a sixteenth corresponding transistor M16'.
  • the control electrode of the seventh transistor M7 is connected to the first pull-down node PD1, the first electrode is connected to the pull-up node PU, and the second electrode is connected to the reference signal terminal VGL.
  • the control electrode of the seventh corresponding transistor M7' is connected to the second pull-down node PD2, the first electrode is connected to the pull-up node PU, and the second electrode is connected to the reference signal terminal VGL.
  • the control electrode of the eighth transistor M8 is connected to the first pull-down node PD1, the first electrode is connected to the first signal output terminal OUT, and the second electrode is connected to the reference signal terminal VGL.
  • the control electrode of the eighth corresponding transistor M8' is connected to the second pull-down node PD2, the first electrode is connected to the first signal output terminal OUT, and the second electrode is connected to the reference signal terminal VGL.
  • the control electrode of the sixteenth transistor M16 is connected to the first pull-down node PD1, the first electrode is connected to the second signal output terminal OC, and the second electrode is connected to the reference signal terminal VGL.
  • the control electrode of the sixteenth corresponding transistor M16' is connected to the second pull-down node PD2, the first electrode is connected to the second signal output terminal OC, and the second electrode is connected to the reference signal terminal VGL.
  • the output signal of the first signal output terminal OUT is only used to drive the display area, and the output signal of the second signal output terminal OC is used as the input signal of the next shift register unit.
  • the shift register 500 may also include a reset circuit 505.
  • the reset circuit 505 may include a second transistor M2 and a thirteenth transistor M13.
  • the control electrode of the second transistor M2 is connected to the first reset signal terminal RESET, the first electrode is connected to the pull-up node PU, and the second electrode is connected to the reference signal terminal VGL.
  • the control electrode of the thirteenth transistor M13 is connected to the second reset signal terminal TRESET, the first electrode is connected to the pull-up node PU, and the second electrode is connected to the reference signal terminal VGL.
  • the first reset signal of the first reset signal terminal RESET is used to pull down the pull-up node PU and the first output signal terminal OUT in the shift register to ensure the normal output of the first output signal terminal OUT.
  • the pull-up node PU generally has some noise.
  • the second reset signal of the second reset signal terminal TRESET can be used to perform a general reset, for example, to reset all the shift registers of the gate drive circuit. Ensure the stability of the shift register.
  • FIG. 6 shows a schematic flowchart of a method 600 for driving a shift register according to an embodiment of the present disclosure.
  • the method 600 is applicable to the shift register of any of the foregoing embodiments.
  • step S601 the input circuit transmits the input signal received by the signal input terminal to the pull-up node.
  • step S602 in response to the potential of the pull-up node, the output circuit transmits the clock signal received at the clock signal terminal to the first signal output terminal.
  • step S603 in response to the potential of the pull-up node, the control circuit transmits the first level of the reference signal to the first pull-down node and/or the second pull-down node under the control of the first control signal and the second control signal.
  • the first control signal terminal receives the first power signal.
  • At least one of the control signal and the second control signal received by the second control signal terminal is at the second level, so that the control circuit transmits the first level of the reference signal received by the reference signal terminal to the first pull-down node and/ Or the second drop-down node.
  • step S604 in response to the potentials of the first pull-down node and the second pull-down node, the pull-down circuit transmits the reference signal of the reference signal terminal to the pull-up node.
  • step S605 under the control of the first reset signal received by the first reset signal terminal, the reset circuit transmits the reference signal of the reference signal terminal to the pull-up node.
  • the first control signal received by the first control signal terminal is the second power signal received by the second power signal terminal and the second control signal received by the second control signal terminal is the first power signal received by the first power signal terminal.
  • a power signal is the first control signal received by the first control signal terminal.
  • the first control signal received by the first control signal terminal and the second control signal received by the second control signal terminal are the third reset signal.
  • the effective level of the third reset signal appears before the start of each frame. In other embodiments, the effective level of the third reset signal appears in response to a transition of the first power signal or the second power signal. This allows the third reset signal to trigger the reset of at least one of the first pull-down node and the second pull-down node before each frame, or trigger the second pull-down node in response to the rising or falling edge of the first power signal or the second power signal. Reset of at least one of a pull-down node and a second pull-down node.
  • the driving method of the shift register according to the present disclosure can make the potential of at least one of the first pull-down node and the second pull-down node the first level of the reference signal when the first power signal and the second power signal are switched , Without changing to the first level of the reference signal after a period of time, thus ensuring that the charging of the pull-up node is not affected.
  • all switching transistors are N-type transistors, the first level is low and the second level is high, VDDe switches from high to low, and VDDo from low
  • the level switch to high level is described as an example.
  • FIG. 7(b) shows a schematic operation timing diagram of the shift register in FIG. 2.
  • the second power signal received at the second power signal terminal VDDe serves as the first control signal received at the first control signal terminal
  • the first power signal received at the first power signal terminal VDDo serves as the The second control signal received by the second control signal terminal.
  • the second power signal of the second power signal terminal VDDe switches from a high level to a low level
  • the first power signal terminal VDDo The first power signal is switched from low level to high level.
  • the first control signal (ie, the second power signal) of the first control signal terminal CON1 switches from high level to low level
  • the first control The second control signal (ie, the first power signal) of the signal terminal CON2 is switched from a low level to a high level. Since the first power signal is at a high level, the fifth transistor M5 is turned on to transmit the high level of the first power signal terminal VDDo to the first pull-down node PD1.
  • the tenth transistor M10 Since the second control signal is at a high level, the tenth transistor M10 is turned on and transmits the low level received by the reference signal terminal VGL to the second pull-down node PD2. Since the first pull-down node PD1 is at a high level and the second pull-down node PD2 is at a low level, only the seventh transistor M7 of the seventh transistor M7 and the seventh corresponding transistor M7′ is turned on, and the reference signal terminal VGL is low The level is transmitted to the pull-up node PU.
  • the second power signal and the first control signal of the second power signal terminal VDDe remain at a low level
  • the first power signal and the second control signal of the first power signal terminal VDDo remain at a high level
  • the input signal INPUT is at a high level
  • the first transistor M1 is turned on
  • the level of the pull-up node PU gradually rises from a low level through a precharge process. Since the pull-up node PU is at a high level, the third transistor M3 is turned on to transmit the clock signal of the clock signal terminal CLK to the first signal output terminal OUT.
  • the pull-up node PU is at a high level
  • the sixth transistor M6 and the sixth corresponding transistor M6' are turned on, and the low level of the reference signal terminal VGL is transmitted through the sixth transistor M6 and the sixth corresponding transistor M6' respectively To the first pull-down node PD1 and the second pull-down node PD2, the first pull-down node PD1 becomes a low level, and the second pull-down node PD2 still remains at a low level.
  • the second power signal and the first control signal of the second power signal terminal VDDe remain at a low level
  • the first power signal and the second control signal of the first power signal terminal VDDo remain at a high level
  • the input signal INPUT is low
  • the first transistor M1 is turned off
  • the level of the pull-up node PU continues to rise through the bootstrap process of the capacitor C1. Since the pull-up node PU is at a high level, the sixth transistor M6 and the sixth corresponding transistor M6' are still turned on, and the first pull-down node PD1 and the second pull-down node PD2 are still kept at a low level.
  • the second power signal and the first control signal of the reference signal terminal VDDe are kept at a low level
  • the first power signal and the second control signal of the first power signal terminal VDDo are kept at a high level
  • the first reset signal The first reset signal received by the terminal RESET is high. Since the first reset signal is at a high level, the second transistor M2 and the fourth transistor M4 are turned on, and the low level of the reference signal terminal VGL is transmitted to the pull-up node PU and the first signal output terminal OUT. Since the pull-up node PU is at a low level, the sixth transistor M6 and the sixth corresponding transistor M6' are turned off.
  • the fifth transistor M5 is still turned on and transmits the high level of the first power signal to the first pull-down node PD1. Since the second control signal is still at a high level, the tenth transistor M10 is still turned on. At this time, although the sixth corresponding transistor M6' is turned off, the low level of the reference signal terminal VGL can still be transmitted to the second pull-down node PD2 . The second pull-down node PD2 still remains at a low level.
  • the switching period between the first power signal and the second power signal is much longer than the frame switching period (for example, once every 16 milliseconds).
  • the frame switching period for example, once every 16 milliseconds.
  • FIG. 7(c) shows another schematic operation timing diagram of the shift register in FIG. 2.
  • the third reset signal STV0 will serve as the first control signal received by the first control signal terminal and the second control signal received by the second control signal terminal.
  • the third reset signal is, for example, the first power signal or Trigger on the rising or falling edge of the second power signal.
  • FIG. 7(c) only shows that the third reset signal STV0 serves as the first control signal received by the first control signal terminal and the second control signal received by the second control signal terminal, and the third reset signal Triggered by the rising edge of the first power signal.
  • the ninth transistor and the tenth transistor are turned on, and the low level received by the reference signal terminal VGL is quickly transmitted to the first pull-down node PD1 and the second pull-down node PD1.
  • the second power signal of the second power signal terminal VDDe is maintained at a low level
  • the first power signal of the first power signal terminal VDDo is maintained at a high level
  • the first control signal and the second control signal are at low power.
  • the first transistor M1 is turned on, and the level of the pull-up node PU gradually rises from the low level through the precharge process. Since the pull-up node PU is at a high level, the third transistor M3 is turned on to transmit the clock signal of the clock signal terminal CLK to the first signal output terminal OUT.
  • the pull-up node PU is at a high level
  • the sixth transistor M6 and the sixth corresponding transistor M6' are turned on, and the low level of the reference signal terminal VGL is transmitted through the sixth transistor M6 and the sixth corresponding transistor M6' respectively To the first pull-down node PD1 and the second pull-down node PD2, the first pull-down node PD1 remains at a low level, and the second pull-down node PD2 still remains at a low level.
  • the second power signal of the second power signal terminal VDDe is kept at a low level
  • the first power signal of the first power signal terminal VDDo is kept at a high level
  • the first control signal and the second control signal are kept at low level.
  • the input signal INPUT is low level
  • the first transistor M1 is turned off
  • the level of the pull-up node PU continues to rise through the bootstrap process of the capacitor C1. Since the pull-up node PU is at a high level, the sixth transistor M6 and the sixth corresponding transistor M6 are still turned on, and the first pull-down node PD1 and the second pull-down node PD2 still remain at a low level.
  • the second power signal of the second power signal terminal VDDe remains low
  • the first power signal of the first power signal terminal VDDo remains high
  • the first control signal and the second control signal remain low Level
  • the first reset signal received by the first reset signal terminal RESET is high. Since the first reset signal is at a high level, the second transistor M2 and the fourth transistor M4 are turned on, and the low level of the reference signal terminal VGL is transmitted to the pull-up node PU. Since the pull-up node PU is at a low level, the sixth transistor M6 and the sixth corresponding transistor M6' are turned off.
  • the fifth transistor M5 is still turned on and the ninth transistor M9 is turned off, so that the first pull-down node PD1 is pulled up to the second A high level of the power signal VDDo. Since the second power signal is at a low level and the second control signal is at a low level, the fifth corresponding transistor M5' and the tenth transistor M10 are both turned off, and the second pull-down node PD2 remains at a low level.
  • the third reset signal is triggered by the rising edge or the falling edge of the first power signal or the second power signal. Therefore, the change of the third reset signal (ie, the first control signal and the second control signal) corresponds to the change of the first power signal or the second power signal. Further, the switching period of the first power signal and the second power signal (for example, switching once every 2 seconds) is much longer than the switching period of the frame (for example, switching once every 16 milliseconds). Therefore, in this embodiment, it may be the same as the embodiment shown in FIG. 7(b), after one period of t1, multiple cycles of periods of t2, t3, and t4 may be experienced, and then another period of t1 may be experienced. Time period, going through multiple cycles of t2, t3, and t4 periods, and so on.
  • FIG. 7(d) shows another schematic operation timing diagram of the shift register in FIG. 2.
  • the third reset signal STV0 will serve as the first control signal received by the first control signal terminal and the second control signal received by the second control signal terminal.
  • the effective level of the third reset signal is in each frame. Appears before the start.
  • FIG. 7(d) shows a situation where the third reset signal STV0 serves as the first control signal received by the first control signal terminal and the second control signal received by the second control signal terminal.
  • the pull-up node is at a low level
  • the second power signal of the second power signal terminal VDDe switches from a high level to a low level
  • the first power signal terminal VDDo is The first power signal is switched from low level to high level
  • the first control signal at the first control signal terminal CON1 and the second control signal at the second control signal terminal CON2 ie, the third reset signal STV0
  • the frame will start. Since the first control signal and the second control signal are both high level, the ninth transistor and the tenth transistor are turned on, and the low level received by the reference signal terminal VGL is quickly transmitted to the first pull-down node PD1 and the second pull-down node PD1.
  • Node PD2 Since the first pull-down node PD1 and the second pull-down node PD2 are both low, the seventh transistor M7 and the seventh corresponding transistor M7' are both turned off, so that the charging of the pull-up node PU is not affected.
  • the second power signal of the second power signal terminal VDDe is maintained at a low level
  • the first power signal of the first power signal terminal VDDo is maintained at a high level
  • the first control signal and the second control signal are at low power.
  • the first transistor M1 is turned on, and the level of the pull-up node PU gradually rises from the low level through the precharge process. Since the pull-up node PU is at a high level, the third transistor M3 is turned on to transmit the clock signal of the clock signal terminal CLK to the first signal output terminal OUT.
  • the pull-up node PU is at a high level
  • the sixth transistor M6 and the sixth corresponding transistor M6' are turned on, and the low level of the reference signal terminal VGL is transmitted through the sixth transistor M6 and the sixth corresponding transistor M6' respectively To the first pull-down node PD1 and the second pull-down node PD2, the first pull-down node PD1 remains at a low level, and the second pull-down node PD2 still remains at a low level.
  • the second power signal of the second power signal terminal VDDe is kept at a low level
  • the first power signal of the first power signal terminal VDDo is kept at a high level
  • the first control signal and the second control signal are kept at low level.
  • the input signal INPUT is low level
  • the first transistor M1 is turned off
  • the level of the pull-up node PU continues to rise through the bootstrap process of the capacitor C1. Since the pull-up node PU is at a high level, the sixth transistor M6 and the sixth corresponding transistor M6 are still turned on, and the first pull-down node PD1 and the second pull-down node PD2 still remain at a low level.
  • the second power signal of the second power signal terminal VDDe remains low
  • the first power signal of the first power signal terminal VDDo remains high
  • the first control signal and the second control signal remain low Level
  • the first reset signal received by the first reset signal terminal RESET is high. Since the first reset signal is at a high level, the second transistor M2 and the fourth transistor M4 are turned on, and the low level of the reference signal terminal VGL is transmitted to the pull-up node PU. Since the pull-up node PU is at a low level, the sixth transistor M6 and the sixth corresponding transistor M6' are turned off.
  • the fifth transistor M5 is still turned on and the ninth transistor M9 is turned off, so that the first pull-down node PD1 is pulled up to the second A high level of the power signal VDDo. Since the second power signal is at a low level and the second control signal is at a low level, the fifth corresponding transistor M5' and the tenth transistor M10 are both turned off, and the second pull-down node PD2 remains at a low level.
  • the effective level of the third reset signal appears before the start of each frame. Therefore, the effective level of the third reset signal (ie, the first control signal and the second control signal) comes before the effective level of the input signal of the shift register of the first row. Further, the switching period between the first power signal and the second power signal (e.g., switching once every 2 seconds) is much longer than the frame switching period (e.g., switching once every 16 milliseconds). Therefore, in this embodiment, each switch between the first power signal and the second power signal may experience multiple cycles of t1 period, t2 period, t3 period, and t4 period. Compared with the embodiment shown in Fig. 7(b) and Fig. 7(c), the embodiment of Fig.
  • the shift register according to the present disclosure has The driving method can make the potential of at least one of the first pull-down node and the second pull-down node be the first level of the reference signal when the first power signal and the third power supply are switched, as shown in Figure 7(b) To the t1 period in 7(d)) without a period of time before becoming the first level of the reference signal (as shown in the t1 period in Figure 7(a)), thereby ensuring the pull-up node Charging is not affected.
  • FIG. 8 shows a schematic block diagram of a display device 800 according to an embodiment of the present disclosure.
  • the display device 800 may be any product or component with a display function, such as electronic paper, mobile phone, tablet computer, television, display, notebook computer, digital photo frame, navigator, etc.
  • the display device 800 may include a gate driving circuit 810 according to an embodiment of the present disclosure.
  • the gate driving circuit 801 may include cascaded N shift registers according to embodiments of the present disclosure (for example, the shift registers shown in FIG. 2, FIG. 3, FIG. 4, and FIG. 5), that is, shift register 1. , Shift register 2, ..., shift register N, N is a positive integer.
  • the gate driving circuit and the display device can make the potential of at least one of the first pull-down node and the second pull-down node the first voltage of the reference signal when the first power signal and the second power signal are switched. It is not required to change to the first level of the reference signal after a period of time, thereby ensuring that the charging of the pull-up node is not affected.

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Abstract

一种移位寄存器(1, 2,…,N, 100, 100', 200, 300, 400, 500)及其驱动方法(600)、一种栅极驱动电路(801)和一种显示装置(800)。移位寄存器(1, 2,…,N, 100, 100', 200, 300, 400, 500)可以包括输入电路(101, 101', 201, 301, 401, 501)、输出电路(102, 102', 202, 302, 402, 502)、复位电路(105, 105', 205, 305, 405, 505)、控制电路(103, 103', 203, 303, 403, 503)和下拉电路(104, 104', 204, 304, 404, 504)。控制电路(103, 103', 203, 303, 403, 503)被配置成响应于上拉节点(PU)的电位,在第一控制信号端(CON1)接收的第一控制信号和第二控制信号端(CON2)接收的第二控制信号的控制下,将参考信号端(VGL)接收的参考信号传输至第一下拉节点(PD1)和/或第二下拉节点(PD2)。

Description

移位寄存器及其驱动方法、栅极驱动电路和显示装置
本申请要求于2019年1月28日提交的、申请号为201910080262.6的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
技术领域
本公开涉及显示领域,尤其涉及一种移位寄存器及其驱动方法、一种栅极驱动电路和一种显示装置。
背景技术
GOA(Gate On Array)是一种将栅极驱动电路集成于薄膜晶体管基板上的技术。每个GOA单元作为一个移位寄存器将扫描信号依次传递给下一GOA单元,逐行开启薄膜晶体管基板的开关,完成像素单元的数据信号输入。
双VDD的直流GOA架构因其稳定的降噪能力,在传统GOA产品中得到了广泛的作用。
发明内容
根据本公开实施例,提供了一种移位寄存器。所述一种移位寄存器包括:
输入电路,连接至信号输入端和所述移位寄存器的上拉节点,被配置成将所述信号输入端接收的输入信号传输至所述上拉节点;
输出电路,连接至第一信号输出端和时钟信号端,被配置成响应于所述上拉节点的电位,将在所述时钟信号端接收的时钟信号传输至所述第一信号输出端;
复位电路,连接至第一复位信号端、参考信号端和所述上拉节点,被配置成在所述第一复位信号端接收的第一复位信号的控制下,将所述参考信号端的参考信号传输至所述上拉节点;
控制电路,连接至所述上拉节点、参考信号端、第一电源信号端、第二电源信号端、第一控制信号端和第二控制信号端,被配置成响应于所述上拉节点的电位,在第一控制信号端接收的第一控制信号和第二控制信号端接收的第二控制信号的 控制下,将参考信号端接收的参考信号传输至所述移位寄存器的第一下拉节点和/或第二下拉节点;以及
下拉电路,连接至所述第一下拉节点和所述第二下拉节点,被配置成响应于第一下拉节点和第二下拉节点的电位,将参考信号端的参考信号传输至所述上拉节点。
在一些实施例中,所述控制电路包括:
第一控制子电路,连接至所述第一电源信号端、所述上拉节点和所述第一下拉节点,并且被配置成响应于所述上拉节点的电位,基于所述第一电源信号端接收的第一电源信号来控制所述第一下拉节点的电位;
第二控制子电路,连接至所述第二电源信号端、所述上拉节点和所述第二下拉节点,并且被配置成响应于所述上拉节点的电位,基于所述第二电源信号端接收的第二电源信号来控制所述第二下拉节点的电位;以及
调整子电路,连接至所述第一控制信号端、所述第二控制信号端、所述第一下拉节点、所述第二下拉节点和所述参考信号端,并且被配置成在所述第一控制信号端接收的第一控制信号的控制下将所述参考信号端接收的参考信号传输至所述第一下拉节点,以及在所述第二控制信号端接收的第二控制信号的控制下将所述参考信号端接收的参考信号传输至所述第二下拉节点。
在一些实施例中,所述调整电路包括:
第九晶体管,所述第九晶体管的控制极连接至所述第一控制信号端,第一极连接至所述第一下拉节点,第二极连接至所述参考信号端;以及
第十晶体管,所述第十晶体管的控制极连接至所述第二控制信号端,第一极连接至所述第二下拉节点,第二极连接至所述参考信号端。
在一些实施例中,所述第一控制信号端与所述第二电源信号端相连,并且所述第二控制信号端与所述第一电源信号端相连。
在一些实施例中,所述第一控制信号端和所述第二控制信号端相连。
在一些实施例中,所述第一控制子电路包括第五晶体管和第六晶体管,所述第二控制子电路包括第五对应晶体管和第六对应晶体管;其中,
第五晶体管的控制极连接至第一电源信号端,第一极连接至第一电源信号端, 第二极连接至第一下拉节点;
第五对应晶体管的控制极连接至第二电源信号端,第一极连接至第二电源信号端,第二极连接至第二下拉节点;
第六晶体管的控制极连接至上拉节点,第一极连接至第一下拉节点,第二极连接至参考信号端;并且
第六对应晶体管的控制极连接至上拉节点,第一极连接至第二下拉节点,第二极连接至参考信号端。
在一些实施例中,所述第一控制子电路包括第五晶体管、第六晶体管、第十一晶体管和第十二晶体管,所述第二控制子电路包括第五对应晶体管、第六对应晶体管、第十一对应晶体管和第十二对应晶体管;其中,
第五晶体管的控制极连接至第一电源信号端,第一极连接至第一电源信号端,第二极连接至第六晶体管的第一极;
第五对应晶体管的控制极连接至第二电源信号端,第一极连接至第二电源信号端,第二极连接至第六对应晶体管的第一极;
第六晶体管的控制极连接至上拉节点,第一极连接至第五晶体管的第二极,第二极连接至参考信号端;
第六对应晶体管的控制极连接至上拉节点,第一极连接至第五对应晶体管的第二极,第二极连接至参考信号端;
第十一晶体管的控制极连接至第五晶体管的第二极,第一极连接至第一电源信号端,第二极连接至第一下拉节点;
第十一对应晶体管的控制极连接至第五对应晶体管的第二极,第一极连接至第二电源信号端,第二极连接至第二下拉节点;
第十二晶体管的控制极连接至上拉节点,第一极连接至第一下拉节点,第二极连接至参考信号端;以及
第十二对应晶体管的控制极连接至上拉节点,第一极连接至第二下拉节点,第二极连接至参考信号端。
在一些实施例中,所述下拉电路包括第七晶体管、第七对应晶体管、第八晶体 管和第八对应晶体管;其中,
第七晶体管的控制极连接至第一下拉节点,第一极连接至上拉节点,第二极连接至参考信号端;
第七对应晶体管的控制极连接至第二下拉节点,第一极连接至上拉节点,第二极连接至参考信号端;
第八晶体管的控制极连接至第一下拉节点,第一极连接至第一信号输出端,第二极连接至参考信号端;以及
第八对应晶体管的控制极连接至第二下拉节点,第一极连接至第一信号输出端,第二极连接至参考信号端。
在一些实施例中,所述下拉电路包括第七晶体管、第七对应晶体管、第八晶体管、第八对应晶体管、第十六晶体管、第十六对应晶体管;其中,
第七晶体管的控制极连接至第一下拉节点,第一极连接至上拉节点,第二极连接至参考信号端;
第七对应晶体管的控制极连接至第二下拉节点,第一极连接至上拉节点,第二极连接至参考信号端;
第八晶体管的控制极连接至第一下拉节点,第一极连接至第一信号输出端,第二极连接至参考信号端;
第八对应晶体管的控制极连接至第二下拉节点,第一极连接至第一信号输出端,第二极连接至参考信号端;
第十六晶体管的控制极连接至第一下拉节点,第一极连接至所述移位寄存器单元的第二信号输出端,第二极连接至参考信号端;以及
第十六对应晶体管的控制极连接至第二下拉节点,第一极连接至第二信号输出端,第二极连接至参考信号端。
在一些实施例中,所述复位电路包括第二晶体管和第四晶体管;其中,
第二晶体管的控制极连接至第一复位信号端,第一极连接至上拉节点,第二极连接至参考信号端;以及
第四晶体管的控制极连接至第一复位信号端,第一极连接至第一信号输出端, 第二极连接至参考信号端。
在一些实施例中,所述复位电路包括第二晶体管,所述第二晶体管的控制极连接至第一复位信号端,第一极连接至上拉节点,第二极连接至参考信号端。
在一些实施例中,所述复位电路包括第二晶体管、第十三晶体管和第十四晶体管;
第二晶体管的控制极连接至第一复位信号端,第一极连接至上拉节点,第二极连接至参考信号端;
第十三晶体管的控制极连接至第二复位信号端,第一极连接至上拉节点,第二极连接至参考信号端;以及
第十四晶体管的控制极连接至第二复位信号端,第一极连接至第一信号输出端,第二极连接至参考信号端。
在一些实施例中,所述复位电路包括第二晶体管和第十三晶体管;
第二晶体管的控制极连接至第一复位信号端,第一极连接至上拉节点,第二极连接至参考信号端;以及
第十三晶体管的控制极连接至第二复位信号端,第一极连接至上拉节点,第二极连接至参考信号端。
在一些实施例中,所述输入电路包括第一晶体管,所述第一晶体管的控制极连接至信号输入端,第一极连接至信号输入端,第二极连接至上拉节点。
在一些实施例中,所述输出电路包括第三晶体管和电容,
第三晶体管的控制极连接至上拉节点,第一极连接至时钟信号端,第二极连接至第一信号输出端;以及
电容的第一端连接至上拉节点,第二端连接至第一信号输出端。
在一些实施例中,所述输出电路包括第三晶体管、第十五晶体管和电容,
第三晶体管的控制极连接至上拉节点,第一极连接至时钟信号端,第二极连接至第一信号输出端;
第十五晶体管的控制极连接至上拉节点,第一极连接至时钟信号端,第二极连接至所述移位寄存器的第二信号输出端;以及
电容的第一端连接至上拉节点,第二端连接至第一信号输出端。
根据本公开的另一方面,提供了一种栅极驱动电路,包括级联的多个上述移位寄存器。
根据本公开的又一方面,提供了一种显示装置,包括上述栅极驱动电路。
根据本公开的再一方面,提供了一种上述移位寄存器的方法,包括:
输入电路将所述信号输入端接收的输入信号传输至所述上拉节点;
响应于所述上拉节点的电位,输出电路将在所述时钟信号端接收的时钟信号传输至所述第一信号输出端;
响应于上拉节点的电位,控制电路在第一控制信号和第二控制信号的控制下,将参考信号的第一电平传输至第一下拉节点和/或第二下拉节点;
响应于第一下拉节点和第二下拉节点的电位,下拉电路将参考信号端的参考信号传输至所述上拉节点;以及
在所述第一复位信号端接收的第一复位信号的控制下,复位电路将所述参考信号端的参考信号传输至所述上拉节点。
在一些实施例中,第一控制信号端接收的第一控制信号是第二电源信号端接收的第二电源信号,并且第二控制信号端接收的第二控制信号是第一电源信号端接收的第一电源信号。
在一些实施例中,第一控制信号端接收的第一控制信号和第二控制信号端接收的第二控制信号均是第三复位信号。
在一些实施例中,所述第三复位信号的有效电平出现在每帧开始前。
在一些实施例中,所述第三复位信号的有效电平响应于第一电源信号或第二电源信号的跳变而出现。
附图说明
图1(a)示出了根据相关技术的一种移位寄存器的示例电路图;
图1(b)示出了根据本公开实施例的一种移位寄存器的示意性方框图;
图1(c)示出了根据本公开另一实施例的一种移位寄存器的示意性方框图;
图2示出了根据本公开一个实施例的一种移位寄存器的示意性电路图;
图3示出了根据本公开另一个实施例的一种移位寄存器的示意性电路图;
图4示出了根据本公开又一个实施例的一种移位寄存器的示意性电路图;
图5示出了根据本公开再一个实施例的一种移位寄存器的示意性电路图;
图6示出了根据本公开实施例的移位寄存器的驱动方法的示意性流程图;
图7(a)示出了图1(a)中的移位寄存器的一种示意性操作时序图;
图7(b)示出了图2中的移位寄存器的一种示意性操作时序图;
图7(c)示出了图2中的移位寄存器的另一种示意性操作时序图;
图7(d)示出了图2中的移位寄存器的又一种示意性操作时序图;以及
图8示出了根据本公开实施例的显示装置的示意性方框图。
具体实施方式
为使本公开实施例的目的、技术方案和优点更加清楚,下面将结合本公开实施例中的附图,对本公开实施例中的技术方案进行清楚、完整的描述。显然,所描述的实施例是本公开的一部分实施例,而不是全部。基于所描述的本公开实施例,本领域普通技术人员在无需创造性劳动的前提下获得的所有其他实施例都属于本公开保护的范围。应注意,贯穿附图,相同的元素由相同或相近的附图标记来表示。在以下描述中,一些具体实施例仅用于描述目的,而不应该理解为对本公开有任何限制,而只是本公开实施例的示例。在可能导致对本公开的理解造成混淆时,将省略常规结构或配置。应注意,图中各部件的形状和尺寸不反映真实大小和比例,而仅示意本公开实施例的内容。
除非另外定义,本公开实施例使用的技术术语或科学术语应当是本领域技术人员所理解的通常意义。本公开实施例中使用的“第一”、“第二”以及类似词语并不表示任何顺序、数量或重要性,而只是用于区分不同的组成部分。
此外,在本公开实施例的描述中,术语“相连”或“连接至”可以是指两个组件直接连接,也可以是指两个组件之间经由一个或多个其他组件相连。此外,这两个组件可以通过有线或无线方式相连或相耦合。
此外,在本公开实施例的描述中,术语“第一电平”和“第二电平”仅用于区别两个电平的幅度不同。例如,下文中以“第一电平”为低电平、“第二电平”为高电平为例进行描述。本领域技术人员可以理解,本公开不局限于此。
本公开实施例中采用的晶体管均可以为薄膜晶体管或场效应管或其他特性相同的器件。在一个实施例中,本公开实施例中使用的薄膜晶体管可以是氧化物半导体晶体管。由于这里采用的薄膜晶体管的源极、漏极是对称的,所以其源极、漏极可以互换。在本公开实施例中,将源极和漏极中的一个称为第一极,将源极和漏极中的另一个称为第二极。在以下示例中以N型薄膜晶体管为例进行描述。本领域技术人员可以理解,本公开实施例显然可以应用于P型薄膜晶体管的情况。
图1(a)示出了根据相关技术的双VDD的直流GOA单元(即,移位寄存器)的一种示例电路图。如图1(a)所示,该GOA单元包括两个直流电源信号端VDDe和VDDo,分别用于接收两个电源信号。这两个电源信号中的一个为高电平,另一个为低电平,其中高电平的电压信号可以为该GOA单元提供放电信号。一般地,这两个信号可以以预定的时间间隔进行切换(例如,每两秒切换一次)并且该切换被设置在节点PU为低电平(在晶体管例如为N型晶体管的情况下)时进行。当电源信号端VDDe从高电平变为低电平并且同时电源信号端VDDo从低电平变为高电平时,晶体管M5导通,晶体管M5′关闭,节点PD2通过晶体管M5’和M6′漏电而慢慢下降到电源信号VGL的电平,相比之下,节点PD1快速被拉高,如图7(a)中的t1时段的节点PD1和PD2所示。如此,在电源信号VDDo和VDDe切换后的一段时间内(例如图7(a)中的t1),节点PD1和PD2都为高电平,以至于晶体管M7和M7’均导通(然而,事实上期望节点PD1为高电平时节点PD2被拉低到电源信号VGL的电平,使晶体管M7和M7’中只有一个导通或者都关闭)。这样,在节点PU充电时,通过晶体管M7和M7’的放电电流较大,影响节点PU的充电。类似地,当电源信号VDDo从高电平变为低电平并且电源信号VDDe从低电平变为高电平时,存在相同的问题。
根据本公开实施例的移位寄存器及其驱动方法、栅极驱动电路和显示装置能够在第一电源信号和第二电源信号切换时,使第一下拉节点和第二下拉节点中的至少一个节点比传统技术更快速地复位至参考信号端的电平,从而防止由于第一下拉节点和第二下拉节点中的一个放电缓慢而影响上拉节点的充电。
图1(b)示出了根据本公开实施例的一种移位寄存器100的示意性方框图。
如图1(b)中所示,移位寄存器100可以包括输入电路101。输入电路101可以连接至信号输入端INPUT和上拉节点PU,并且被配置成将所述信号输入端 INPUT接收的输入信号传输至上拉节点PU。
移位寄存器100可以包括输出电路102。输出电路102可以连接至第一信号输出端OUT和时钟信号端CLK,并且被配置成响应于上拉节点PU的电位,将在时钟信号端CLK接收的时钟信号传输至第一信号输出端OUT。
移位寄存器100可以包括控制电路103。控制电路103可以连接至上拉节点PU、参考信号端VGL、第一电源信号端VDDo、第二电源信号端VDDe、第一控制信号端CON1和第二控制信号端CON2,并且被配置成响应于上拉节点PU的电位,在第一控制信号端CON1接收的第一控制信号和第二控制信号端CON2接收的第二控制信号的控制下,将参考信号端VGL接收的参考信号传输至第一下拉节点PD1和/或第二下拉节点PD2。
在一个实施例中,在参考信号端VGL接收的参考信号可以一直保持为第一电平,在第一电源信号端VDDo接收的第一电源信号和在第二电源信号端VDDe接收的第二电源信号可以是在第一电平和第二电平之间切换的信号,例如周期性脉冲信号。这使得在第一时段,第一电源信号为第一电平,第二电源信号为第二电平;而在第二时段,第一电源信号为第二电平,第二电源信号为第一电平。第一电源信号和第二电源信号可以周期相同,幅值相同但相位相反。第一电源信号和第二电源信号的周期可以例如是2秒,或者任何适当的时间。根据本公开,两个电源信号之间的切换指的是,在一个电源信号从第一电平转变为第二电平的同时,另一个电源信号从第二电平转变为第一电平。
在一个实施例中,可以将第一控制信号端CON1与第二电源信号端VDDe连接,将第二控制信号端CON2与第一电源信号端VDDo连接。这使得第一控制信号端CON1接收的第一控制信号是第二电源信号端VDDe接收的第二电源信号,并且第二控制信号端CON2接收的第二控制信号是第一电源信号端VDDo接收的第一电源信号。
在一个实施例中,可以将第一控制信号端CON1和第二控制信号端CON2连接以接收同一信号(例如第三复位信号),这使得第一控制信号端CON1接收的第一控制信号和第二控制信号端CON2接收的第二控制信号均是第三复位信号。第三复位信号用于将第一下拉节点PD1和第二下拉节点PD2复位,例如下拉至低电平。在一些实施例中,所述第三复位信号的有效电平可以出现在每帧开始前。在另一些 实施例中,第三复位信号的有效电平可以响应于第一电源信号或第二电源信号的跳变而出现。例如,这使得第三复位信号可以在每帧开始前触发第一下拉节点PD1和第二下拉节点PD2的复位,或者可以响应于第一电源信号或第二电源信号的跳变(例如上升沿或下降沿)来触发第一下拉节点PD1和第二下拉节点PD2的复位。也就是说,第三复位信号的周期可以与第一电源信号或第二电源信号的周期相同,也可以与帧的周期相同。
移位寄存器100可以包括下拉电路104。下拉电路104可以连接至第一下拉节点PD1和第二下拉节点PD2,并且被配置成响应于第一下拉节点PD1和第二下拉节点PD2的电位,将参考信号端VGL的参考信号传输至上拉节点PU。
移位寄存器100可以包括复位电路105。复位电路105可以连接至第一复位信号端RESET、参考信号端VGL和上拉节点PU,并且被配置成在第一复位信号端RESET接收的第一复位信号的控制下,将参考信号端VGL的参考信号传输至上拉节点PU。
根据本公开的移位寄存器能够在第一电源信号和第二电源信号切换时,使第一下拉节点和第二下拉节点中的至少一个节点能够快速复位至参考信号端的电平(例如第一电平),从而避免由于第一下拉节点和第二下拉节点中的某一个放电缓慢而影响上拉节点的充电。
图1(c)示出了根据本公开另一实施例的一种移位寄存器的示意性方框图。
类似于图1(b),如图1(c)所示的移位寄存器100’包括输入电路101’、输出电路102’、控制电路103’、下拉电路104’和复位电路105’。以上参考图1(b)对输入电路、输出电路、控制电路、下拉电路和复位电路的描述同样适用于移位寄存器100’,这里不在赘述。
如图1(c)所示,控制电路103’包括第一控制子电路1031、第二控制子电路1032和调整子电路1033。
第一控制子电路1031连接至第一电源信号端VDDo、上拉节点PU和第一下拉节点PD1。第一控制子电路1031可以响应于上拉节点PU的电位,基于第一电源信号端VDDo接收的第一电源信号来控制第一下拉节点PD1的电位。
第二控制子电路1032连接至第二电源信号端VDDe、上拉节点PU和第二下拉节点PD2。第二控制子电路1032可以响应于上拉节点PU的电位,基于第二电源信 号端VDDe接收的第二电源信号来控制第二下拉节点PD2的电位。
调整子电路1033连接至第一控制信号端CON1、第二控制信号端CON2、第一下拉节点PD1、第二下拉节点PD2和参考信号端VGL。调整子电路1033可以在第一控制信号端CON1接收的第一控制信号的控制下将参考信号端VGL接收的参考信号传输至第一下拉节点PD1,以及在第二控制信号端CON2接收的第二控制信号的控制下将参考信号端VGL接收的参考信号传输至第二下拉节点PD2。
图2示出了根据本公开一个实施例的一种移位寄存器200的示意性电路图。
如图2中所示,移位寄存器200可以包括输入电路201。所述输入电路201可以包括第一晶体管M1。第一晶体管M1的控制极连接至信号输入端INPUT,第一极连接至信号输入端INPUT,以及第二极连接至上拉节点PU。
移位寄存器200还可以包括输出电路202。所述输出电路202可以包括第三晶体管M3和电容C1。第三晶体管M1的控制极连接至上拉节点PU,第一极连接至时钟信号端CLK,以及第二极连接至第一信号输出端OUT。电容C1的第一端连接至上拉节点PU,以及第二端连接至第一信号输出端OUT。
移位寄存器200还可以包括控制电路203。所述控制电路203可以包括第一控制子电路、第二控制子电路和调整子电路。第一控制子电路可以包括第五晶体管M5、第五对应晶体管M5′和第六晶体管M6。第二控制子电路可以包括第五对应晶体管M5′和第六对应晶体管M6′。调整子电路可以包括第九晶体管M9和第十晶体管M10。第五晶体管M5的控制极连接至第一电源信号端VDDo,第一极连接至第一电源信号端VDDo,以及第二极连接至第一下拉节点PD1。第五对应晶体管M5′的控制极连接至第二电源信号端VDDe,第一极连接至第二电源信号端VDDe,以及第二极连接至第二下拉节点PD2。第六晶体管M6的控制极连接至上拉节点PU,第一极连接至第一下拉节点PD1,以及第二极连接至参考信号端VGL。第六对应晶体管M6′的控制极连接至上拉节点PD1,第一极连接至第二下拉节点PD2,以及第二极连接至参考信号端VGL。第九晶体管M9的控制极连接至第一控制信号端CON1,第一极连接至第一下拉节点PD1,以及第二极连接至参考信号端VGL。第十晶体管M10的控制极连接至第二控制信号端CON2,第一极连接至第二下拉节点PD2,以及第二极连接至参考信号端VGL。
移位寄存器200还可以包括下拉电路204。所述下拉电路204可以包括第七晶体 管M7、第七对应晶体管M7′、第八晶体管M8和第八对应晶体管M8′。第七晶体管M7的控制极连接至第一下拉节点PD1,第一极连接至上拉节点PU,第二极连接至参考信号端VGL。第七对应晶体管M7′的控制极连接至第二下拉节点PD2,第一极连接至上拉节点PU,第二极连接至参考信号端VGL。第八晶体管M8的控制极连接至第一下拉节点PD1,第一极连接至第一信号输出端OUT,第二极连接至参考信号端VGL。第八对应晶体管M8′的控制极连接至第二下拉节点PD2,第一极连接至第一信号输出端OUT,第二极连接至参考信号端VGL。
移位寄存器200还可以包括复位电路205。所述复位电路205可以包括第二晶体管M2和第四晶体管M4。第二晶体管M2的控制极连接至第一复位信号端RESET,第一极连接至上拉节点PU,第二极连接至参考信号端VGL。第四晶体管M4的控制极连接至第一复位信号端RESET,第一极连接至第一信号输出端OUT,第二极连接至参考信号端VGL。
图3示出了根据本公开另一个实施例的一种移位寄存器300的示意性电路图。
如图3中所示,移位寄存器300可以包括输入电路301。所述输入电路301可以包括第一晶体管M1。第一晶体管M1的控制极连接至信号输入端INPUT,第一极连接至信号输入端INPUT,以及第二极连接至上拉节点PU。
移位寄存器300还可以包括输出电路302。所述输出电路302可以包括第三晶体管M3和电容C1。第三晶体管M1的控制极连接至上拉节点PU,第一极连接至时钟信号端CLK,以及第二极连接至第一信号输出端OUT。电容C1的第一端连接至上拉节点PU,以及第二端连接至第一信号输出端OUT。
移位寄存器300还可以包括控制电路303。所述控制电路303可以包括第一控制子电路、第二控制子电路和调整子电路。第一控制子电路可以包括第五晶体管M5、第六晶体管M6、第十一晶体管M11和第十二晶体管M12。第二控制子电路可以包括第五对应晶体管M5′、第六对应晶体管M6′、第十一对应晶体管M11′和第十二对应晶体管M12′。调整子电路可以包括第九晶体管M9和第十晶体管M10。第五晶体管M5的控制极连接至第一电源信号端VDDo,第一极连接至第一电源信号端VDDo,以及第二极连接至第六晶体管M6的第一极。第五对应晶体管M5′的控制极连接至第二电源信号端VDDe,第一极连接至第二电源信号端VDDe,第二极连接至第六对应晶体管M6′的第一极。第六晶体管M6的控制极连接至上拉节点PU,第一极连 接至第五晶体管M5的第二极,以及第二极连接至参考信号端VGL。第六对应晶体管M6′的控制极连接至上拉节点PU,第一极连接至第五对应晶体管M5′的第二极,第二极连接至参考信号端VGL。第九晶体管M9的控制极连接至第一控制信号端CON1,第一极连接至第一下拉节点PD1,以及第二极连接至参考信号端VGL。第十晶体管M10的控制极连接至第二控制信号端CON2,第一极连接至第二下拉节点PD2,以及第二极连接至参考信号端VGL。第十一晶体管M11的控制极连接至第五晶体管M5的第二极,第一极连接至第一电源信号端VDDo,第二极连接至第一下拉节点PD1。第十一对应晶体管M11′的控制极连接至第五对应晶体管M5′的第二极,第一极连接至第二电源信号端VDDe,第二极连接至第二下拉节点PD2。第十二晶体管M12的控制极连接至上拉节点PU,第一极连接至第一下拉节点PD1,以及第二极连接至参考信号端VGL。第十二对应晶体管M12′的控制极连接至上拉节点PU,第一极连接至第二下拉节点PD2,以及第二极连接至参考信号端VGL。
移位寄存器300还可以包括下拉电路304。所述下拉电路304可以包括第七晶体管M7、第七对应晶体管M7′、第八晶体管M8和第八对应晶体管M8′。第七晶体管M7的控制极连接至第一下拉节点PD1,第一极连接至上拉节点PU,第二极连接至参考信号端VGL。第七对应晶体管M7′的控制极连接至第二下拉节点PD2,第一极连接至上拉节点PU,第二极连接至参考信号端VGL。第八晶体管M8的控制极连接至第一下拉节点PD1,第一极连接至第一信号输出端OUT,第二极连接至参考信号端VGL。第八对应晶体管M8′的控制极连接至第二下拉节点PD2,第一极连接至第一信号输出端OUT,第二极连接至参考信号端VGL。
移位寄存器300还可以包括复位电路305。所述复位电路305可以包括第二晶体管M2。第二晶体管M2的控制极连接至第一复位信号端RESET,第一极连接至上拉节点PU,以及第二极连接至参考信号端VGL。
图4示出了根据本公开又一个实施例的一种移位寄存器400的示意性电路图。
如图4中所示,移位寄存器400可以包括输入电路401。所述输入电路401可以包括第一晶体管M1。第一晶体管M1的控制极连接至信号输入端INPUT,第一极连接至信号输入端INPUT,以及第二极连接至上拉节点PU。
移位寄存器400还可以包括输出电路402。所述输出电路402可以包括第三晶体管M3和电容C1。第三晶体管M1的控制极连接至上拉节点PU,第一极连接至时钟 信号端CLK,以及第二极连接至第一信号输出端OUT。电容C1的第一端连接至上拉节点PU,以及第二端连接至第一信号输出端OUT。
移位寄存器400还可以包括控制电路403。所述控制电路403可以包括第一控制子电路、第二控制子电路和调整子电路。第一控制子电路可以包括第五晶体管M5、第六晶体管M6、第十一晶体管M11和第十二晶体管M12。第二控制子电路可以包括第五对应晶体管M5′、第六对应晶体管M6′、第十一对应晶体管M11′和第十二对应晶体管M12′。调整子电路可以包括第九晶体管M9和第十晶体管M10。第五晶体管M5的控制极连接至第一电源信号端VDDo,第一极连接至第一电源信号端VDDo,以及第二极连接至第六晶体管M6的第一极。第五对应晶体管M5′的控制极连接至第二电源信号端VDDe,第一极连接至第二电源信号端VDDe,第二极连接至第六对应晶体管M6′的第一极。第六晶体管M6的控制极连接至上拉节点PU,第一极连接至第五晶体管M5的第二极,以及第二极连接至参考信号端VGL。第六对应晶体管M6′的控制极连接至上拉节点PU,第一极连接至第五对应晶体管M5′的第二极,第二极连接至参考信号端VGL。第九晶体管M9的控制极连接至第一控制信号端CON1,第一极连接至第一下拉节点PD1,以及第二极连接至参考信号端VGL。第十晶体管M10的控制极连接至第二控制信号端CON2,第一极连接至第二下拉节点PD2,以及第二极连接至参考信号端VGL。第十一晶体管M11的控制极连接至第五晶体管M5的第二极,第一极连接至第一电源信号端VDDo,第二极连接至第一下拉节点PD1。第十一对应晶体管M11′的控制极连接至第五对应晶体管M5′的第二极,第一极连接至第二电源信号端VDDe,第二极连接至第二下拉节点PD2。第十二晶体管M12的控制极连接至上拉节点PU,第一极连接至第一下拉节点PD1,以及第二极连接至参考信号端VGL。第十二对应晶体管M12′的控制极连接至上拉节点PU,第一极连接至第二下拉节点PD2,以及第二极连接至参考信号端VGL。
移位寄存器400还可以包括下拉电路404。所述下拉电路404可以包括第七晶体管M7、第七对应晶体管M7′、第八晶体管M8和第八对应晶体管M8′。第七晶体管M7的控制极连接至第一下拉节点PD1,第一极连接至上拉节点PU,第二极连接至参考信号端VGL。第七对应晶体管M7′的控制极连接至第二下拉节点PD2,第一极连接至上拉节点PU,第二极连接至参考信号端VGL。第八晶体管M8的控制极连接至第一下拉节点PD1,第一极连接至第一信号输出端OUT,第二极连接至参考信 号端VGL。第八对应晶体管M8′的控制极连接至第二下拉节点PD2,第一极连接至第一信号输出端OUT,第二极连接至参考信号端VGL。
移位寄存器400还可以包括复位电路405。所述复位电路405可以包括第二晶体管M2、第十三晶体管M13和第十四晶体管M14。第二晶体管M2的控制极连接至第一复位信号端RESET,第一极连接至上拉节点PU,第二极连接至参考信号端VGL。第十三晶体管M13的控制极连接至第二复位信号端TRESET,第一极连接至上拉节点PU以及第二极连接至参考信号端VGL。第十四晶体管M14的控制极连接至第二复位信号端TRESET,第一极连接至第一信号输出端OUT,以及第二极连接至参考信号端VGL。在该复位电路405中,为了增强上拉节点PU和第一信号输出端OUT的降噪,在每帧结束时,通过使用第二复位信号端TRESET的第二复位信号为所有行对应的移位寄存器降噪。与第二复位信号端TRESET的第二复位信号不同,第一复位信号端RESET的第一复位信号用于在该移位寄存器完成输出之后,将该移位寄存器的上拉节点PU和第一信号输出端OUT下拉,以避免时钟信号端CLK的时钟信号不断输出至第一信号输出端OUT,从而导致显示混乱。
图5示出了根据本公开再一个实施例的一种移位寄存器500的示意性电路图。
如图5中所示,移位寄存器500可以包括输入电路501。所述输入电路501可以包括第一晶体管M1。第一晶体管M1的控制极连接至信号输入端INPUT,第一极连接至信号输入端INPUT,以及第二极连接至上拉节点PU。
移位寄存器500还可以包括输出电路502。所述输出电路502可以包括第三晶体管M3、第十五晶体管M15和电容C1。第三晶体管M3的控制极连接至上拉节点PU,第一极连接至时钟信号端CLK,以及第二极连接至第一信号输出端OUT。第十五晶体管M15的控制极连接至上拉节点PU,第一极连接至时钟信号端CLK,以及第二极连接至第二信号输出端OC。电容C1的第一端连接至上拉节点PU,以及第二端连接至第一信号输出端OUT。
移位寄存器500还可以包括控制电路503。所述控制电路503可以包括第一控制子电路、第二控制子电路和调整子电路。第一控制子电路包括第五晶体管M5、第六晶体管M6、第十一晶体管M11和第十二晶体管M12。第二控制子电路包括第五对应晶体管M5′、第六对应晶体管M6′、第十一对应晶体管M11′和第十二对应晶体管M12′。调整子电路包括第九晶体管M9和第十晶体管M10。第五晶体管M5的控 制极连接至第一电源信号端VDDo,第一极连接至第一电源信号端VDDo,以及第二极连接至第六晶体管M6的第一极。第五对应晶体管M5′的控制极连接至第二电源信号端VDDe,第一极连接至第二电源信号端VDDe,第二极连接至第六对应晶体管M6′的第一极。第六晶体管M6的控制极连接至上拉节点PU,第一极连接至第五晶体管M5的第二极,以及第二极连接至参考信号端VGL。第六对应晶体管M6′的控制极连接至上拉节点PU,第一极连接至第五对应晶体管M5′的第二极,第二极连接至参考信号端VGL。第九晶体管M9的控制极连接至第一控制信号端CON1,第一极连接至第一下拉节点PD1,以及第二极连接至参考信号端VGL。第十晶体管M10的控制极连接至第二控制信号端CON2,第一极连接至第二下拉节点PD2,以及第二极连接至参考信号端VGL。第十一晶体管M11的控制极连接至第五晶体管M5的第二极,第一极连接至第一电源信号端VDDo,第二极连接至第一下拉节点PD1。第十一对应晶体管M11′的控制极连接至第五对应晶体管M5′的第二极,第一极连接至第二电源信号端VDDe,第二极连接至第二下拉节点PD2。第十二晶体管M12的控制极连接至上拉节点PU,第一极连接至第一下拉节点PD1,以及第二极连接至参考信号端VGL。第十二对应晶体管M12′的控制极连接至上拉节点PU,第一极连接至第二下拉节点PD2,以及第二极连接至参考信号端VGL。
移位寄存器500还可以包括下拉电路504。所述下拉电路504可以包括第七晶体管M7、第七对应晶体管M7′、第八晶体管M8、第八对应晶体管M8′、第十六晶体管M16和第十六对应晶体管M16′。第七晶体管M7的控制极连接至第一下拉节点PD1,第一极连接至上拉节点PU,第二极连接至参考信号端VGL。第七对应晶体管M7′的控制极连接至第二下拉节点PD2,第一极连接至上拉节点PU,第二极连接至参考信号端VGL。第八晶体管M8的控制极连接至第一下拉节点PD1,第一极连接至第一信号输出端OUT,第二极连接至参考信号端VGL。第八对应晶体管M8′的控制极连接至第二下拉节点PD2,第一极连接至第一信号输出端OUT,第二极连接至参考信号端VGL。第十六晶体管M16的控制极连接至第一下拉节点PD1,第一极连接至第二信号输出端OC,以及第二极连接至参考信号端VGL。第十六对应晶体管M16′的控制极连接至第二下拉节点PD2,第一极连接至第二信号输出端OC,以及第二极连接至参考信号端VGL。在该实施例中,第一信号输出端OUT的输出信号仅仅用于驱动显示区域,第二信号输出端OC的输出信号用作下一个移位寄存 器单元的输入信号。
移位寄存器500还可以包括复位电路505。所述复位电路505可以包括第二晶体管M2和第十三晶体管M13。第二晶体管M2的控制极连接至第一复位信号端RESET,第一极连接至上拉节点PU,以及第二极连接至参考信号端VGL。第十三晶体管M13的控制极连接至第二复位信号端TRESET,第一极连接至上拉节点PU,第二极连接至参考信号端VGL。在该电路中第一复位信号端RESET的第一复位信号用于将该移位寄存器中的上拉节点PU和第一输出信号端OUT下拉,保证第一输出信号端OUT的正常输出。一般地,在移位寄存器的工作过程中,因为时钟信号端CLK对上拉节点PU的耦合,因此,上拉节点PU一般会有一些噪音。为了防止这些噪音影响下一帧的工作,一般在该帧结束之后,可以利用第二复位信号端TRESET的第二复位信号进行总复位,例如对栅极驱动电路的全部移位寄存器进行复位,以便保证移位寄存器的稳定性。
图6示出了根据本公开实施例的移位寄存器的驱动方法600的示意性流程图。该方法600适用于上述任意实施例的移位寄存器。
在步骤S601,输入电路将所述信号输入端接收的输入信号传输至所述上拉节点。
在步骤S602,响应于所述上拉节点的电位,输出电路将在所述时钟信号端接收的时钟信号传输至所述第一信号输出端。
在步骤S603,响应于上拉节点的电位,控制电路在第一控制信号和第二控制信号的控制下,将参考信号的第一电平传输至第一下拉节点和/或第二下拉节点。例如在上拉节点为第一电平的情况下,在第一电源信号端接收的第一电源信号与第二电源信号端接收的第二电源信号切换时,第一控制信号端接收的第一控制信号和第二控制信号端接收的第二控制信号中的至少一个为第二电平,从而使控制电路将参考信号端接收的参考信号的第一电平传输至第一下拉节点和/或第二下拉节点。
在步骤S604,响应于第一下拉节点和第二下拉节点的电位,下拉电路将参考信号端的参考信号传输至所述上拉节点。
在步骤S605,在所述第一复位信号端接收的第一复位信号的控制下,复位电路将所述参考信号端的参考信号传输至所述上拉节点。
在一个实施例中,第一控制信号端接收的第一控制信号是第二电源信号端接收的第二电源信号以及第二控制信号端接收的第二控制信号是第一电源信号端接收 的第一电源信号。
在另一个实施例中,第一控制信号端接收的第一控制信号和第二控制信号端接收的第二控制信号是第三复位信号。在一些实施例中,所述第三复位信号的有效电平出现在每帧开始前。在另一些实施例中,所述第三复位信号的有效电平响应于第一电源信号或第二电源信号的跳变而出现。这使得第三复位信号可以在每帧前触发对第一下拉节点和第二下拉节点中至少一个的复位或者响应于第一电源信号或第二电源信号的上升沿或下降沿来触发对第一下拉节点和第二下拉节点中至少一个的复位。
根据本公开的移位寄存器的驱动方法能够在第一电源信号和第二电源信号切换时,使第一下拉节点和第二下拉节点中的至少一个节点的电位为参考信号的第一电平,而不用经过一段时间才变为参考信号的第一电平,从而保证了上拉节点的充电不受影响。
接下来将参考图2、图6和图7(b)至7(d)来详细描述根据本公开实施例的移位寄存器的操作。为例便于描述,以下示例中以所有开关晶体管均为N型晶体管、第一电平为低电平且第二电平为高电平,VDDe从高电平切换为低电平,VDDo从低电平切换为高电平为例进行描述。
图7(b)示出了图2中的移位寄存器的一种示意性操作时序图。在该时序图中,由第二电源信号端VDDe处接收的第二电源信号充当在第一控制信号端接收的第一控制信号,由第一电源信号端VDDo处接收的第一电源信号充当在第二控制信号端接收的第二控制信号。
如图7(b)中所示,在t1时段,在上拉节点处于低电平时,第二电源信号端VDDe的第二电源信号从高电平切换到低电平,第一电源信号端VDDo的第一电源信号从低电平切换到高电平,相应地,第一控制信号端CON1的第一控制信号(即,第二电源信号)从高电平切换到低电平,第一控制信号端CON2的第二控制信号(即,第一电源信号)从低电平切换到高电平。由于第一电源信号为高电平,所以第五晶体管M5导通,将第一电源信号端VDDo的高电平传输至第一下拉节点PD1。由于第二控制信号为高电平,所以第十晶体管M10导通,将参考信号端VGL接收的低电平传输至第二下拉节点PD2。由于第一下拉节点PD1为高电平,第二下拉节点PD2为低电平,所以第七晶体管M7和第七对应晶体管M7′中只有第七晶体管M7导 通,将参考信号端VGL的低电平传输至上拉节点PU。
在t2时段,第二电源信号端VDDe的第二电源信号和第一控制信号保持为低电平,第一电源信号端VDDo的第一电源信号和第二控制信号保持为高电平,输入信号INPUT为高电平,第一晶体管M1导通,上拉节点PU的电平通过预充过程从低电平逐渐升高。由于上拉节点PU为高电平,第三晶体管M3导通,将时钟信号端CLK的时钟信号传输至第一信号输出端OUT。此外,由于上拉节点PU为高电平,所以第六晶体管M6和第六对应晶体管M6′导通,将参考信号端VGL的低电平通过第六晶体管M6和第六对应晶体管M6′分别传输至第一下拉节点PD1和第二下拉节点PD2,第一下拉节点PD1变为低电平,第二下拉节点PD2仍然保持为低电平。
在t3时段,第二电源信号端VDDe的第二电源信号和第一控制信号保持为低电平,第一电源信号端VDDo的第一电源信号和第二控制信号保持为高电平,输入信号INPUT为低电平,第一晶体管M1关闭,上拉节点PU的电平通过电容C1的自举过程继续升高。由于上拉节点PU为高电平,所以第六晶体管M6和第六对应晶体管M6’仍然导通,第一下拉节点PD1和第二下拉节点PD2仍然保持为低电平。
在t4时段,参考信号端VDDe的第二电源信号和第一控制信号保持为低电平,第一电源信号端VDDo的第一电源信号和第二控制信号保持为高电平,第一复位信号端RESET接收的第一复位信号为高电平。由于第一复位信号为高电平,所以第二晶体管M2和第四晶体管M4导通,将参考信号端VGL的低电平传输至上拉节点PU和第一信号输出端OUT。由于上拉节点PU为低电平,第六晶体管M6和第六对应晶体管M6′关闭。此时,由于第一电源信号为高电平,所以第五晶体管M5仍然导通,将第一电源信号的高电平传输至第一下拉节点PD1。由于第二控制信号仍然为高电平,所以第十晶体管M10仍然导通,此时尽管第六对应晶体管M6’关闭,但仍然可以将参考信号端VGL的低电平传输至第二下拉节点PD2。第二下拉节点PD2仍然保持为低电平。
一般而言,第一电源信号与第二电源信号的切换周期(例如,每2秒切换一次)要远远大于帧的切换周期(例如,每16毫秒切换一次)。如此,可以在经历一个t1时段之后,经历多个t2时段、t3时段和t4时段的循环,然后再经历一个t1时段,经历多个t2时段、t3时段和t4时段的循环,以此类推。
图7(c)示出了图2中的移位寄存器的另一种示意性操作时序图。在该时序图 中,将由第三复位信号STV0充当第一控制信号端接收的第一控制信号和第二控制信号端接收的第二控制信号,所述第三复位信号例如通过第一电源信号或第二电源信号的上升沿或下降沿进行触发。作为示例,图7(c)中仅仅示出了由第三复位信号STV0充当第一控制信号端接收的第一控制信号和第二控制信号端接收的第二控制信号并且所述第三复位信号通过第一电源信号的上升沿触发的情形。
如图7(c)中所示,在t1时段,在上拉节点处于低电平时,第二电源信号端VDDe的第二电源信号从高电平切换到低电平,第一电源信号端VDDo的第一电源信号从低电平切换到高电平,第一控制信号端CON1的第一控制信号和第二控制信号端CON2的第二控制信号(即,第三复位信号STV0)由于第一电源信号的上升沿的触发而变为高电平。由于第一控制信号和第二控制信号均为高电平,所以第九晶体管和第十晶体管导通,将参考信号端VGL接收的低电平快速传输至第一下拉节点PD1和第二下拉节点PD2。由于第一下拉节点PD1和第二下拉节点PD2均为低电平,所以第七晶体管M7和第七对应晶体管M7′都关闭,从而不影响上拉节点PU的充电。
在t2时段,第二电源信号端VDDe的第二电源信号保持为低电平,第一电源信号端VDDo的第一电源信号保持为高电平,第一控制信号和第二控制信号为低电平,输入信号INPUT为高电平,第一晶体管M1导通,上拉节点PU的电平通过预充过程从低电平逐渐升高。由于上拉节点PU为高电平,第三晶体管M3导通,将时钟信号端CLK的时钟信号传输至第一信号输出端OUT。此外,由于上拉节点PU为高电平,所以第六晶体管M6和第六对应晶体管M6′导通,将参考信号端VGL的低电平通过第六晶体管M6和第六对应晶体管M6′分别传输至第一下拉节点PD1和第二下拉节点PD2,第一下拉节点PD1保持为低电平,第二下拉节点PD2仍然保持为低电平。
在t3时段,第二电源信号端VDDe的第二电源信号保持为低电平,第一电源信号端VDDo的第一电源信号保持为高电平,第一控制信号和第二控制信号保持为低电平,输入信号INPUT为低电平,第一晶体管M1关闭,上拉节点PU的电平通过电容C1的自举过程继续升高。由于上拉节点PU为高电平,所以第六晶体管M6和第六对应晶体管M6仍然导通,第一下拉节点PD1和第二下拉节点PD2仍然保持为低电平。
在t4时段,第二电源信号端VDDe的第二电源信号保持为低电平,第一电源信号端VDDo的第一电源信号保持为高电平,第一控制信号和第二控制信号保持为低电平,第一复位信号端RESET接收的第一复位信号为高电平。由于第一复位信号为高电平,所以第二晶体管M2和第四晶体管M4导通,将参考信号端VGL的低电平传输至上拉节点PU。由于上拉节点PU为低电平,第六晶体管M6和第六对应晶体管M6′关闭。此时,由于第一电源信号VDDo为高电平并且第一控制信号为低电平,所以第五晶体管M5仍然导通并且第九晶体管M9关闭,从而使第一下拉节点PD1上拉至第一电源信号VDDo的高电平。由于第二电源信号为低电平并且第二控制信号为低电平,所以第五对应晶体管M5’和第十晶体管M10都关闭,第二下拉节点PD2仍然保持为低电平。
在该实施例中,第三复位信号由第一电源信号或第二电源信号的上升沿或下降沿触发。因此,第三复位信号(即,第一控制信号和第二控制信号)的变化对应于第一电源信号或第二电源信号的变化。进一步地,第一电源信号与第二电源信号的切换周期(例如,每2秒切换一次)要远远大于帧的切换周期(例如,每16毫秒切换一次)。因此,在该实施例中,可以与图7(b)中所示的实施例相同,可以在经历一个t1时段之后,经历多个t2时段、t3时段和t4时段的循环,然后再经历一个t1时段,经历多个t2时段、t3时段和t4时段的循环,以此类推。
图7(d)示出了图2中的移位寄存器的又一种示意性操作时序图。在该时序图中,将由第三复位信号STV0充当第一控制信号端接收的第一控制信号和第二控制信号端接收的第二控制信号,所述第三复位信号的有效电平在每帧开始前出现。作为示例,图7(d)中示出了由第三复位信号STV0充当第一控制信号端接收的第一控制信号和第二控制信号端接收的第二控制信号的情形。
如图7(d)中所示,在t1时段,上拉节点处于低电平,第二电源信号端VDDe的第二电源信号从高电平切换到低电平,第一电源信号端VDDo的第一电源信号从低电平切换到高电平,第一控制信号端CON1的第一控制信号和第二控制信号端CON2的第二控制信号(即,第三复位信号STV0)为高电平,此后帧将会开始。由于第一控制信号和第二控制信号均为高电平,所以第九晶体管和第十晶体管导通,将参考信号端VGL接收的低电平快速传输至第一下拉节点PD1和第二下拉节点PD2。由于第一下拉节点PD1和第二下拉节点PD2均为低电平,所以第七晶体管 M7和第七对应晶体管M7′都关闭,从而不影响上拉节点PU的充电。
在t2时段,第二电源信号端VDDe的第二电源信号保持为低电平,第一电源信号端VDDo的第一电源信号保持为高电平,第一控制信号和第二控制信号为低电平,输入信号INPUT为高电平,第一晶体管M1导通,上拉节点PU的电平通过预充过程从低电平逐渐升高。由于上拉节点PU为高电平,第三晶体管M3导通,将时钟信号端CLK的时钟信号传输至第一信号输出端OUT。此外,由于上拉节点PU为高电平,所以第六晶体管M6和第六对应晶体管M6′导通,将参考信号端VGL的低电平通过第六晶体管M6和第六对应晶体管M6′分别传输至第一下拉节点PD1和第二下拉节点PD2,第一下拉节点PD1保持为低电平,第二下拉节点PD2仍然保持为低电平。
在t3时段,第二电源信号端VDDe的第二电源信号保持为低电平,第一电源信号端VDDo的第一电源信号保持为高电平,第一控制信号和第二控制信号保持为低电平,输入信号INPUT为低电平,第一晶体管M1关闭,上拉节点PU的电平通过电容C1的自举过程继续升高。由于上拉节点PU为高电平,所以第六晶体管M6和第六对应晶体管M6仍然导通,第一下拉节点PD1和第二下拉节点PD2仍然保持为低电平。
在t4时段,第二电源信号端VDDe的第二电源信号保持为低电平,第一电源信号端VDDo的第一电源信号保持为高电平,第一控制信号和第二控制信号保持为低电平,第一复位信号端RESET接收的第一复位信号为高电平。由于第一复位信号为高电平,所以第二晶体管M2和第四晶体管M4导通,将参考信号端VGL的低电平传输至上拉节点PU。由于上拉节点PU为低电平,第六晶体管M6和第六对应晶体管M6′关闭。此时,由于第一电源信号VDDo为高电平并且第一控制信号为低电平,所以第五晶体管M5仍然导通并且第九晶体管M9关闭,从而使第一下拉节点PD1上拉至第一电源信号VDDo的高电平。由于第二电源信号为低电平并且第二控制信号为低电平,所以第五对应晶体管M5’和第十晶体管M10都关闭,第二下拉节点PD2仍然保持为低电平。
在该实施例中,第三复位信号的有效电平出现在每帧开始前。因此,第三复位信号(即,第一控制信号和第二控制信号)的有效电平在第一行移位寄存器的输入信号的有效电平之前到来。进一步地,第一电源信号与第二电源信号的切换周期(例 如,每2秒切换一次)要远远大于帧的切换周期(例如,每16毫秒切换一次)。因此,在该实施例中,第一电源信号与第二电源信号之间的每一次切换,可以经历多个t1时段、t2时段、t3时段和t4时段的循环。与图7(b)和图7(c)中所示的实施例相比,在图7(d)的实施例中要经历更多个循环(每个循环包括t1时段、t2时段、t3时段和t4时段)在每帧开始之前都使第一下拉节点和第二下拉节点中的至少一个节点的电位为参考信号的第一电平,因此本实施例的功耗将更大,但是却更可靠。
通过将根据相关技术的图7(a)所示的时序图与根据本公开实施例的图7(b)至7(d)所示的时序图相比可知,根据本公开的移位寄存器的驱动方法能够在第一电源信号和第三电源进行信号切换时,使第一下拉节点和第二下拉节点中的至少一个节点的电位为参考信号的第一电平(如图7(b)至7(d)中的t1时段所示),而不用经过一段时间才变为参考信号的第一电平(如图7(a)中的t1时段所示),从而保证了上拉节点的充电不受影响。
本领域技术人员基于图2和图7(b)至7(d)的详细描述,能够容易理解图3、图4和图5中所示的移位寄存器的操作时序与图2中所示的移位寄存器的操作时序类似,因此在此不再赘述。
图8示出了根据本公开实施例的显示装置800的示意性方框图。根据本公开实施例的显示装置800可以是电子纸、手机、平板电脑、电视机、显示器、笔记本电脑、数码相框、导航仪等任何具有显示功能的产品或部件。
如图8中所示,显示装置800可以包括根据本公开实施例的栅极驱动电路810。所述栅极驱动电路801可以包括级联的N个根据本公开实施例的移位寄存器(例如图2、图3、图4、图5中所示的移位寄存器),即移位寄存器1、移位寄存器2、……,移位寄存器N,N为正整数。
根据本公开的栅极驱动电路和显示装置能够在第一电源信号和第二电源信号切换时,使第一下拉节点和第二下拉节点中的至少一个节点的电位为参考信号的第一电平,而不用经过一段时间才变为参考信号的第一电平,从而保证了上拉节点的充电不受影响。
以上所述的具体实施例,对本公开实施例的目的、技术方案和有益效果进行了进一步详细说明。应理解的是,以上所述仅为本公开实施例的具体实施例而已,并 不用于限制本公开。在不背离本公开的精神和原则的情况下,所做的任何修改、等同替换、改进等,均应包含在本公开的保护范围之内。

Claims (23)

  1. 一种移位寄存器,包括:
    输入电路,连接至信号输入端和所述移位寄存器的上拉节点,被配置成将所述信号输入端接收的输入信号传输至所述上拉节点;
    输出电路,连接至第一信号输出端和时钟信号端,被配置成响应于所述上拉节点的电位,将在所述时钟信号端接收的时钟信号传输至所述第一信号输出端;
    复位电路,连接至第一复位信号端、参考信号端和所述上拉节点,被配置成在所述第一复位信号端接收的第一复位信号的控制下,将所述参考信号端的参考信号传输至所述上拉节点;
    控制电路,连接至所述上拉节点、参考信号端、第一电源信号端、第二电源信号端、第一控制信号端和第二控制信号端,被配置成响应于所述上拉节点的电位,在第一控制信号端接收的第一控制信号和第二控制信号端接收的第二控制信号的控制下,将参考信号端接收的参考信号传输至所述移位寄存器的第一下拉节点和/或第二下拉节点;以及
    下拉电路,连接至所述第一下拉节点和所述第二下拉节点,被配置成响应于第一下拉节点和第二下拉节点的电位,将参考信号端的参考信号传输至所述上拉节点。
  2. 根据权利要求1所述的移位寄存器,其中,所述控制电路包括:
    第一控制子电路,连接至所述第一电源信号端、所述上拉节点和所述第一下拉节点,并且被配置成响应于所述上拉节点的电位,基于所述第一电源信号端接收的第一电源信号来控制所述第一下拉节点的电位;
    第二控制子电路,连接至所述第二电源信号端、所述上拉节点和所述第二下拉节点,并且被配置成响应于所述上拉节点的电位,基于所述第二电源信号端接收的第二电源信号来控制所述第二下拉节点的电位;以及
    调整子电路,连接至所述第一控制信号端、所述第二控制信号端、所述第一下拉节点、所述第二下拉节点和所述参考信号端,并且被配置成在所述第一控制信号端接收的第一控制信号的控制下将所述参考信号端接收的参考信号传输至所述第一下拉节点,以及在所述第二控制信号端接收的第二控制信号的控制下将所述参考 信号端接收的参考信号传输至所述第二下拉节点。
  3. 根据权利要求2所述的移位寄存器,其中,所述调整子电路包括:
    第九晶体管,所述第九晶体管的控制极连接至所述第一控制信号端,第一极连接至所述第一下拉节点,第二极连接至所述参考信号端;以及
    第十晶体管,所述第十晶体管的控制极连接至所述第二控制信号端,第一极连接至所述第二下拉节点,第二极连接至所述参考信号端。
  4. 根据权利要求1所述的移位寄存器,其中,所述第一控制信号端与所述第二电源信号端相连,并且所述第二控制信号端与所述第一电源信号端相连。
  5. 根据权利要求1所述的移位寄存器,其中,所述第一控制信号端和所述第二控制信号端相连。
  6. 根据权利要求1至5中任一项所述的移位寄存器,其中,所述第一控制子电路包括第五晶体管和第六晶体管,所述第二控制子电路包括第五对应晶体管和第六对应晶体管;其中,
    第五晶体管的控制极连接至第一电源信号端,第一极连接至第一电源信号端,第二极连接至第一下拉节点;
    第五对应晶体管的控制极连接至第二电源信号端,第一极连接至第二电源信号端,第二极连接至第二下拉节点;
    第六晶体管的控制极连接至上拉节点,第一极连接至第一下拉节点,第二极连接至参考信号端;并且
    第六对应晶体管的控制极连接至上拉节点,第一极连接至第二下拉节点,第二极连接至参考信号端。
  7. 根据权利要求1至5中任一项所述的移位寄存器,其中,所述第一控制子电路包括第五晶体管、第六晶体管、第十一晶体管和第十二晶体管,所述第二控制子电路包括第五对应晶体管、第六对应晶体管、第十一对应晶体管和第十二对应晶体管;其中,
    第五晶体管的控制极连接至第一电源信号端,第一极连接至第一电源信号端,第二极连接至第六晶体管的第一极;
    第五对应晶体管的控制极连接至第二电源信号端,第一极连接至第二电源信号端,第二极连接至第六对应晶体管的第一极;
    第六晶体管的控制极连接至上拉节点,第一极连接至第五晶体管的第二极,第二极连接至参考信号端;
    第六对应晶体管的控制极连接至上拉节点,第一极连接至第五对应晶体管的第二极,第二极连接至参考信号端;
    第十一晶体管的控制极连接至第五晶体管的第二极,第一极连接至第一电源信号端,第二极连接至第一下拉节点;
    第十一对应晶体管的控制极连接至第五对应晶体管的第二极,第一极连接至第二电源信号端,第二极连接至第二下拉节点;
    第十二晶体管的控制极连接至上拉节点,第一极连接至第一下拉节点,第二极连接至参考信号端;以及
    第十二对应晶体管的控制极连接至上拉节点,第一极连接至第二下拉节点,第二极连接至参考信号端。
  8. 根据权利要求1至5中任一项所述的移位寄存器,其中,所述下拉电路包括第七晶体管、第七对应晶体管、第八晶体管和第八对应晶体管;其中,
    第七晶体管的控制极连接至第一下拉节点,第一极连接至上拉节点,第二极连接至参考信号端;
    第七对应晶体管的控制极连接至第二下拉节点,第一极连接至上拉节点,第二极连接至参考信号端;
    第八晶体管的控制极连接至第一下拉节点,第一极连接至第一信号输出端,第二极连接至参考信号端;以及
    第八对应晶体管的控制极连接至第二下拉节点,第一极连接至第一信号输出端,第二极连接至参考信号端。
  9. 根据权利要求1至5中任一项所述的移位寄存器,其中,所述下拉电路包括第七晶体管、第七对应晶体管、第八晶体管、第八对应晶体管、第十六晶体管、第十六对应晶体管;其中,
    第七晶体管的控制极连接至第一下拉节点,第一极连接至上拉节点,第二极连接至参考信号端;
    第七对应晶体管的控制极连接至第二下拉节点,第一极连接至上拉节点,第二极连接至参考信号端;
    第八晶体管的控制极连接至第一下拉节点,第一极连接至第一信号输出端,第二极连接至参考信号端;
    第八对应晶体管的控制极连接至第二下拉节点,第一极连接至第一信号输出端,第二极连接至参考信号端;
    第十六晶体管的控制极连接至第一下拉节点,第一极连接至所述移位寄存器单元的第二信号输出端,第二极连接至参考信号端;以及
    第十六对应晶体管的控制极连接至第二下拉节点,第一极连接至第二信号输出端,第二极连接至参考信号端。
  10. 根据权利要求1至5中任一项所述的移位寄存器,其中,所述复位电路包括第二晶体管和第四晶体管;其中,
    第二晶体管的控制极连接至第一复位信号端,第一极连接至上拉节点,第二极连接至参考信号端;以及
    第四晶体管的控制极连接至第一复位信号端,第一极连接至第一信号输出端,第二极连接至参考信号端。
  11. 根据权利要求1至5中任一项所述的移位寄存器,其中,所述复位电路包括第二晶体管,所述第二晶体管的控制极连接至第一复位信号端,第一极连接至上拉节点,第二极连接至参考信号端。
  12. 根据权利要求1至5中任一项所述的移位寄存器,其中,所述复位电路包括第二晶体管、第十三晶体管和第十四晶体管;
    第二晶体管的控制极连接至第一复位信号端,第一极连接至上拉节点,第二极连接至参考信号端;
    第十三晶体管的控制极连接至第二复位信号端,第一极连接至上拉节点,第二极连接至参考信号端;以及
    第十四晶体管的控制极连接至第二复位信号端,第一极连接至第一信号输出端,第二极连接至参考信号端。
  13. 根据权利要求1至5中任一项所述的移位寄存器,其中,所述复位电路包括第二晶体管和第十三晶体管;
    第二晶体管的控制极连接至第一复位信号端,第一极连接至上拉节点,第二极连接至参考信号端;以及
    第十三晶体管的控制极连接至第二复位信号端,第一极连接至上拉节点,第二极连接至参考信号端。
  14. 根据权利要求1至5中任一项所述的移位寄存器,其中,所述输入电路包括第一晶体管,所述第一晶体管的控制极连接至信号输入端,第一极连接至信号输入端,第二极连接至上拉节点。
  15. 根据权利要求1至5中任一项所述的移位寄存器,其中,所述输出电路包括第三晶体管和电容,
    第三晶体管的控制极连接至上拉节点,第一极连接至时钟信号端,第二极连接至第一信号输出端;以及
    电容的第一端连接至上拉节点,第二端连接至第一信号输出端。
  16. 根据权利要求1至5中任一项所述的移位寄存器,其中,所述输出电路包括第三晶体管、第十五晶体管和电容,
    第三晶体管的控制极连接至上拉节点,第一极连接至时钟信号端,第二极连接至第一信号输出端;
    第十五晶体管的控制极连接至上拉节点,第一极连接至时钟信号端,第二极连接至所述移位寄存器的第二信号输出端;以及
    电容的第一端连接至上拉节点,第二端连接至第一信号输出端。
  17. 一种栅极驱动电路,包括级联的多个根据权利要求1-16中任一项所述的移位寄存器。
  18. 一种显示装置,包括根据权利要求17所述的栅极驱动电路。
  19. 一种驱动根据权利要求1-16中任一项所述的移位寄存器的方法,包括:
    输入电路将所述信号输入端接收的输入信号传输至所述上拉节点;
    响应于所述上拉节点的电位,输出电路将在所述时钟信号端接收的时钟信号传输至所述第一信号输出端;
    响应于上拉节点的电位,控制电路在第一控制信号和第二控制信号的控制下,将参考信号的第一电平传输至第一下拉节点和/或第二下拉节点;
    响应于第一下拉节点和第二下拉节点的电位,下拉电路将参考信号端的参考信号传输至所述上拉节点;以及
    在所述第一复位信号端接收的第一复位信号的控制下,复位电路将所述参考信号端的参考信号传输至所述上拉节点。
  20. 根据权利要求19所述的方法,其中,第一控制信号端接收的第一控制信号是第二电源信号端接收的第二电源信号,并且第二控制信号端接收的第二控制信号是第一电源信号端接收的第一电源信号。
  21. 根据权利要求19所述的方法,其中,第一控制信号端接收的第一控制信号和第二控制信号端接收的第二控制信号均是第三复位信号。
  22. 根据权利要求21所述的方法,其中,所述第三复位信号的有效电平出现在每帧开始前。
  23. 根据权利要求21所述的方法,其中,所述第三复位信号的有效电平响应于第一电源信号或第二电源信号的跳变而出现。
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