WO2020038362A1 - 移位寄存器及其驱动方法、栅极驱动电路、显示装置 - Google Patents
移位寄存器及其驱动方法、栅极驱动电路、显示装置 Download PDFInfo
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- WO2020038362A1 WO2020038362A1 PCT/CN2019/101590 CN2019101590W WO2020038362A1 WO 2020038362 A1 WO2020038362 A1 WO 2020038362A1 CN 2019101590 W CN2019101590 W CN 2019101590W WO 2020038362 A1 WO2020038362 A1 WO 2020038362A1
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C7/00—Arrangements for writing information into, or reading information out from, a digital store
- G11C7/10—Input/output [I/O] data interface arrangements, e.g. I/O data control circuits, I/O data buffers
- G11C7/1015—Read-write modes for single port memories, i.e. having either a random port or a serial port
- G11C7/1036—Read-write modes for single port memories, i.e. having either a random port or a serial port using data shift registers
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
- G11C11/21—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements
- G11C11/34—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices
- G11C11/40—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices using transistors
- G11C11/401—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices using transistors forming cells needing refreshing or charge regeneration, i.e. dynamic cells
- G11C11/4063—Auxiliary circuits, e.g. for addressing, decoding, driving, writing, sensing or timing
- G11C11/407—Auxiliary circuits, e.g. for addressing, decoding, driving, writing, sensing or timing for memory cells of the field-effect type
- G11C11/4074—Power supply or voltage generation circuits, e.g. bias voltage generators, substrate voltage generators, back-up power, power control circuits
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C19/00—Digital stores in which the information is moved stepwise, e.g. shift registers
- G11C19/28—Digital stores in which the information is moved stepwise, e.g. shift registers using semiconductor elements
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C7/00—Arrangements for writing information into, or reading information out from, a digital store
- G11C7/10—Input/output [I/O] data interface arrangements, e.g. I/O data control circuits, I/O data buffers
- G11C7/1051—Data output circuits, e.g. read-out amplifiers, data output buffers, data output registers, data output level conversion circuits
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C7/00—Arrangements for writing information into, or reading information out from, a digital store
- G11C7/10—Input/output [I/O] data interface arrangements, e.g. I/O data control circuits, I/O data buffers
- G11C7/1078—Data input circuits, e.g. write amplifiers, data input buffers, data input registers, data input level conversion circuits
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C7/00—Arrangements for writing information into, or reading information out from, a digital store
- G11C7/12—Bit line control circuits, e.g. drivers, boosters, pull-up circuits, pull-down circuits, precharging circuits, equalising circuits, for bit lines
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C7/00—Arrangements for writing information into, or reading information out from, a digital store
- G11C7/20—Memory cell initialisation circuits, e.g. when powering up or down, memory clear, latent image memory
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C7/00—Arrangements for writing information into, or reading information out from, a digital store
- G11C7/22—Read-write [R-W] timing or clocking circuits; Read-write [R-W] control signal generators or management
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/04—Structural and physical details of display devices
- G09G2300/0421—Structural details of the set of electrodes
- G09G2300/0426—Layout of electrodes and connections
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0264—Details of driving circuits
- G09G2310/0267—Details of drivers for scan electrodes, other than drivers for liquid crystal, plasma or OLED displays
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0264—Details of driving circuits
- G09G2310/0286—Details of a shift registers arranged for use in a driving circuit
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/08—Details of timing specific for flat panels, other than clock recovery
Definitions
- the present application relates to the field of display technology, and in particular, to a shift register and a driving method thereof, a gate driving circuit, and a display device.
- each shift register When the display device performs display, a plurality of shift registers of the gate driving unit sequentially provide scanning signals to corresponding gate lines. Among them, each shift register outputs a valid signal in the output stage of its work, and outputs an invalid signal after the output stage. It is desirable that there is no threshold loss for invalid signals output after the output phase.
- the present disclosure proposes a shift register, a driving method thereof, a gate driving circuit, and a display device.
- the present disclosure provides a shift register including: an input sub-circuit connected to an input terminal, a first clock terminal, and a first node of the shift register, for responding to the first in an input stage.
- a first level signal provided by a clock terminal, electrically connecting the input terminal to the first node; a control sub-circuit, and the first node, an intermediate output terminal of the shift register, a second clock terminal,
- the third node, the third clock terminal, the second level terminal that provides the second level signal and the first level terminal that provides the first level signal are connected to each other according to the level of the first node.
- the phase, the output phase, and the reset phase transmit the signal provided by the second clock terminal to the intermediate output terminal, and control the third node's voltage according to the potential of the intermediate output terminal and the signal provided by the third clock terminal.
- Potential a pull-up sub-circuit is connected to the intermediate output terminal, the final output terminal of the shift register, and the second level terminal, and is configured to respond to the potential of the intermediate output terminal in the output stage, Describe A two-level terminal is electrically connected to the final output terminal; a first voltage regulator sub-circuit is connected to a lower node connection terminal, the final output terminal and the third node are used for the output phase and the reset phase In response to the first level signal provided by the connection node of the lower node, stabilize the voltage between the final output terminal and the third node; the pull-down transistor, the gate of which is connected to the third node, and the first electrode It is connected to the first level terminal, and the second pole is connected to the final output terminal.
- the first voltage regulator circuit reduces the potential of the third no
- the first voltage regulator circuit is further configured to stabilize the final output in response to a first level signal provided by the connection node of the lower node in a first pull-down phase after the reset phase. The voltage between the terminal and the third node.
- control sub-circuit includes: a second voltage regulator sub-circuit, connected to the first node, the second node, and the intermediate output terminal, and configured to connect the first node during the input stage.
- a node is electrically connected to the second node, and stabilizes the voltage between the second node and the intermediate output terminal; a first pull-up control sub-circuit, and the intermediate output terminal, the second node, and all nodes
- the second clock terminal is connected and is used to transmit a second level signal provided by the second clock terminal to the intermediate output terminal in response to the potential of the second node during the input phase and the reset phase.
- the shift register further includes: a second pull-up control sub-circuit, connected to the first clock terminal, the first node, the first level terminal, and a fourth node, for In response to the potential of the first node in the output stage, transmitting a second level signal provided by the first clock terminal to the fourth node, and in response to the first pull-down stage
- the control of the first level signal provided by the first clock end electrically connects the first level end to the fourth node
- the third pull-up control sub-circuit is connected to the fourth node and the second power
- the flat terminal is connected to the intermediate output terminal, and is configured to electrically connect the second level terminal to the intermediate output terminal in response to the potential of the fourth node in the first pull-down phase and the second pull-down phase
- a two pull-down control sub-circuit is connected to the intermediate output terminal, the third node, and a fourth clock terminal, and is responsive to the potential of the fourth node and the intermediate output terminal, and is configured to provide the fourth clock terminal Signal from the second level
- the input sub-circuit includes a first transistor, a gate of the first transistor is connected to the first clock terminal, and a first pole of the first transistor is connected to an input of the shift register. Terminals are connected, and a second pole of the first transistor is connected to the first node.
- the second voltage regulator circuit includes a first capacitor and a second transistor, a first terminal of the first capacitor is connected to the second node, and a second terminal of the first capacitor is connected to The intermediate output terminal is connected; the gate of the second transistor is connected to the first level terminal, the first pole of the second transistor is connected to the second node, and the second electrode of the second transistor Connected to the first node.
- the first pull-up control sub-circuit includes a third transistor, a gate of the third transistor is connected to the second node, and a first electrode of the third transistor is connected to the intermediate output.
- the second terminal of the third transistor is connected to the second clock terminal.
- the pull-up sub-circuit includes a fourth transistor, a gate of the fourth transistor is connected to the intermediate output terminal, and a first pole of the fourth transistor is connected to the second level terminal The second pole of the fourth transistor is connected to the final output terminal.
- the first pull-down control sub-circuit includes a fifth transistor and a sixth transistor.
- the gate of the fifth transistor is connected to the intermediate output terminal, the first electrode of the fifth transistor is connected to the second level terminal, and the second electrode of the fifth transistor is connected to the third node.
- the gate of the sixth transistor is connected to the third clock terminal, the first electrode of the sixth transistor is connected to the third node, and the second electrode of the sixth transistor is connected to the first level terminal. Connected.
- the first voltage regulator circuit includes a second capacitor and a seventh transistor, a gate of the seventh transistor is connected to the connection node of the lower node, and a first electrode of the seventh transistor is connected to The final output terminal is adjacent, the second electrode of the seventh transistor is connected to the first terminal of the second capacitor, and the second terminal of the second capacitor is connected to the third node.
- the second pull-up control sub-circuit includes an eighth transistor and a ninth transistor, a gate of the eighth transistor is connected to the first clock terminal, and a first electrode of the eighth transistor Connected to the first level terminal, the second pole of the eighth transistor is connected to the fourth node; the gate of the ninth transistor is connected to the first node, and the first of the ninth transistor A pole is connected to the fourth node, and a second pole of the ninth transistor is connected to the first clock terminal.
- the shift register further includes a third voltage regulator sub-circuit, connected to the second level terminal and the fourth node, for stabilizing the second level terminal and the fourth node Voltage.
- the third voltage regulator circuit includes a third capacitor, a first end of the third capacitor is connected to the fourth node, and a second end of the third capacitor is connected to the second capacitor.
- the level terminals are connected.
- the third pull-up control sub-circuit includes a tenth transistor, a gate of the tenth transistor is connected to the fourth node, and a first pole of the tenth transistor is connected to the second node.
- the level terminal is connected, and the second pole of the tenth transistor is connected to the intermediate output terminal.
- the second pull-down control sub-circuit includes an eleventh transistor, a twelfth transistor, and a fourth capacitor, a gate of the eleventh transistor is connected to the fourth node, and the tenth A first pole of a transistor is connected to a first end of the fourth capacitor, a second pole of the eleventh transistor is connected to a first pole of the twelfth transistor; a gate of the twelfth transistor A second terminal connected to the fourth capacitor is connected to the third node, and a second electrode of the twelfth transistor is connected to the fourth clock terminal.
- the shift register further includes a fourth pull-up control sub-circuit, the fourth pull-up control sub-circuit and the fourth node, the second clock terminal, the first node, and The second level terminal is connected, and is configured to switch the second level terminal in response to the control of the potential of the fourth node and the first level signal provided by the second clock terminal in the second pull-down stage. Electrically connected to the first node.
- the fourth pull-up control sub-circuit includes a thirteenth transistor and a fourteenth transistor, and a gate of the thirteenth transistor is connected to the fourth node.
- a first pole is connected to the second level terminal, a second pole of the thirteenth transistor is connected to the first pole of the fourteenth transistor; a gate of the fourteenth transistor is connected to the second clock The second terminal of the fourteenth transistor is connected to the first node.
- the present disclosure provides a driving method of a shift register.
- the shift register includes: an input sub-circuit connected to an input terminal of the shift register, a first clock terminal, and a first node; and a control sub-circuit connected to the first node and an intermediate output of the shift register Terminal, the second clock terminal, the third node, the third clock terminal, the second level terminal that provides the second level signal and the first level terminal that provides the first level signal; a pull-up sub-circuit, connected to the middle An output terminal, a final output terminal of the shift register and the second level terminal are connected; a first voltage regulator sub-circuit is connected to a lower node connection terminal, the final output terminal is connected to the third node; a pull-down transistor, The gate is connected to the third node, the first electrode is connected to the first level terminal, and the second electrode is connected to the final output terminal.
- the driving method includes, in an input stage, providing a first level signal to the first clock terminal, providing a first level signal to the input terminal, and providing a second level signal to the second clock terminal, Providing a first level signal to the third clock terminal, the input sub-circuit electrically connecting the input terminal of the shift register with the first node, and the control sub-circuit connecting the first clock signal provided by the second clock terminal
- the two-level signal is transmitted to the intermediate output terminal and electrically connects the first level terminal to the third node;
- the pull-down transistor electrically connects the first level terminal to the final output terminal; in the output stage, A second level signal is provided to the first clock terminal, a first level signal is provided to the second clock terminal, and a second level signal is provided to the third clock terminal, and the control sub-circuit
- the first level signal provided by the second clock terminal is transmitted to the intermediate output terminal; the pull-up sub-circuit electrically connects the second level terminal with the final output terminal; during the reset phase, it sends to the first clock
- the first pull-up control sub-circuit transmits the second level signal provided by the second clock terminal to an intermediate output.
- the first pull-down control sub-circuit electrically connects the first level terminal with the third node; the pull-down transistor electrically connects the first level terminal with the final output terminal; the first voltage regulator The circuit reduces the potential of the third node to a level lower than a first level signal provided by the first level terminal.
- the shift register further includes: a second pull-up control sub-circuit connected to the first clock terminal, the first node, the first level terminal, and a fourth node; the third A pull-up control sub-circuit is connected to the fourth node, the second level terminal and the intermediate output terminal; a second pull-down control sub-circuit is connected to the intermediate output terminal, the third node, and a fourth clock ⁇ ⁇ End connected.
- the driving method further includes: in the output stage, the second pull-up control sub-circuit transmits a second level signal provided by the first clock terminal to the fourth node; and in the reset stage After: in a first pull-down phase, a first level signal is provided to the first clock terminal, a second level signal is provided to the second clock terminal, and a first level signal is provided to the third clock terminal
- the second pull-up control sub-circuit electrically connects the first level terminal to the fourth node; in a second pull-down phase, a second level signal is provided to the first clock terminal, and the first
- the second clock terminal provides a first level signal
- the third clock terminal provides a second level signal
- the third voltage regulator circuit keeps the potential of the fourth node the same as the first pull-down stage;
- the second pull-down control sub-circuit keeps the voltage between the third node and the fourth clock terminal the same as the previous first pull-down stage.
- the first pull-down phase and the second pull-down phase are alternately performed.
- the present disclosure provides a gate driving circuit including N cascaded shift registers, each of which is any one of the above-mentioned shift registers.
- the intermediate output of each of the first to (N-1) th shift registers is connected to the input of the next-stage shift register, and each of the first to (N-1) th shift registers is connected
- the connection nodes of the lower-level nodes are all connected to the first node of the next-level shift register.
- the present disclosure provides a display device including the above gate driving circuit.
- FIG. 1 is a schematic block diagram of a shift register according to an embodiment of the present disclosure
- FIG. 2 is a schematic block diagram of a shift register according to an embodiment of the present disclosure
- FIG. 3 is a schematic circuit diagram of a shift register provided by an embodiment of the present disclosure.
- FIG. 5 is a flowchart of a method for driving a shift register according to an embodiment of the present disclosure
- FIG. 6 is a schematic block diagram of a gate driving circuit according to an embodiment of the present disclosure.
- the transistor in the shift register is a P-type transistor and a high-level signal is output during the output stage, after the output stage, the pull-down transistor transmits the signal at the low-level signal terminal to the output of the shift register, but There is a threshold loss when a P-type transistor transmits a low-level signal, resulting in a certain loss of the low-level output after the shift register output stage.
- FIG. 1 is a schematic block diagram of a shift register according to an embodiment of the present disclosure.
- the shift register includes an input sub-circuit 1, a first regulator sub-circuit 2, a first pull-up control sub-circuit 3, a pull-up sub-circuit 4, a first pull-down control sub-circuit 5, and a first Two regulator circuits 6 and a pull-down transistor Tp.
- the first voltage regulator sub-circuit 2, the first pull-up control sub-circuit 3, and the first pull-down control sub-circuit constitute a control sub-circuit, which is used according to the level of the first node N1 in the input phase, the output phase and
- the reset stage transmits the signal provided by the second clock terminal CB to the intermediate output terminal GOUT, and controls the potential of the third node N3 according to the potential of the intermediate output terminal GOUT and the signal provided by the third clock terminal CLK.
- the input sub-circuit 1 is connected to the input terminal IN, the first clock terminal CK, and the first node N1 of the shift register, and is configured to shift the input signal in response to the first level signal provided by the first clock terminal CK during the input phase.
- An input terminal IN of the register is electrically connected to the first node N1.
- the first node N1 is a connection node between the input sub-circuit 1 and the first regulator sub-circuit 2.
- the first voltage stabilizing sub-circuit 2 is connected to the first node N1, the second node N2, and the intermediate output terminal GOUT of the shift register, and is used to electrically connect the first node N1 and the second node N2 during the input stage, and is stable.
- the voltage between the second node N2 and the intermediate output terminal GOUT, so that when the first node N1 has no signal input during the output stage, the voltage between the second node N2 and the intermediate output terminal GOUT can be kept the same as the input stage.
- the second node N2 is a connection node between the first voltage regulator sub-circuit 2 and the first pull-up control sub-circuit 3; the intermediate output terminal GOUT is used to connect to the input terminal of the next-stage shift register.
- the first pull-up control sub-circuit 3 is connected to the intermediate output terminal GOUT, the second node N2, and the second clock terminal CB. In response to the potential of the second node N2, it is used to supply the The second level signal is transmitted to the intermediate output terminal GOUT; and the first level signal provided by the second clock terminal CB is transmitted to the intermediate output terminal GOUT in the output stage.
- the pull-up sub-circuit 4 is connected to the intermediate output terminal GOUT, the final output terminal EOUT of the shift register, and the second level terminal VGH providing a second-level signal, and is configured to respond to the potential of the intermediate output terminal GOUT during the output stage to connect the second
- the level terminal VGH is electrically connected to the final output terminal EOUT.
- the final output terminal EOUT is used to connect to the gate line to provide a scanning signal to the gate line.
- the first pull-down control sub-circuit 5 is connected to the intermediate output terminal GOUT, the third node N3, the third clock terminal CLK, the second level terminal VGH, and the first level terminal VGL that provides a first level signal, and is used in the output stage. In response to the potential of the intermediate output terminal GOUT, electrically connect the second level terminal VGH to the third node N3; and in response to the first level signal provided by the third clock terminal CLK during the input phase and reset phase, connect the first level terminal VGL It is electrically connected to the third node N3.
- the third node N3 is a connection node between the gate of the pull-down transistor, the second voltage regulator sub-circuit, and the second pull-down control sub-circuit.
- the second voltage regulator sub-circuit 6 is connected to the next node connection terminal Next, the final output terminal EOUT and the third node N3, and is used to stabilize the final signal in the output phase and the reset phase in response to the first level signal provided by the next node connection terminal Next.
- the voltage between the output terminal EOUT and the third node N3, that is, the voltage between the final output terminal EOUT and the third node N3 is stored in the output stage, and the stored voltage is kept the same as the output stage in the reset stage.
- the lower node connection end Next is used to connect to the first node N1 of the next-stage shift register.
- the gate of the pull-down transistor Tp is connected to the third node N3, the first pole is connected to the first level terminal VGL, and the second pole is connected to the final output terminal EOUT of the shift register.
- the first and second poles of the pull-down transistor Tp are turned on when a gate of the pull-down transistor Tp receives a first-level signal.
- Each of the above-mentioned sub-circuits may include a transistor, and the first level signal and the second-level signal may be determined according to the types of the transistors and the pull-down transistor Tp in each sub-circuit.
- the first-level signal Is a high level signal
- the second level signal is a low level signal
- the first level signal is a low level signal
- the second level signal is a high level signal
- the first level terminal VGL is a low-level signal terminal
- the second level terminal VGH is a high-level signal terminal.
- each transistor in the shift register is a P-type transistor
- the first level signal is a low level signal
- the second level signal is a high level signal
- the final output terminal EOUT of the shift register outputs a high level in the output stage.
- the level signal is introduced as an example.
- the reason why the shift register outputs a low-level signal with a threshold loss after the output phase is that in the reset phase after the output phase, the low-level signal received by the gate of the pull-down transistor and the source of the pull-down transistor
- the potential of the connected low-level signal terminal is the same, but the P-type transistor is fully turned on when the gate is smaller than the source potential and the potential difference is not less than the absolute value of the threshold value of the P-type transistor. Therefore, the current pull-down of the shift register The transistor cannot be fully turned on during the reset stage, causing a threshold loss when a signal at a low-level signal terminal is transmitted to an output terminal of the shift register.
- the threshold voltage of a pull-down transistor is -1V.
- the pull-down transistor When the gate potential and source potential of the pull-down transistor are both -7V, the pull-down transistor cannot fully transfer the -7V potential of the source to the drain, and the drain potential will Reached -6V.
- the N-type transistor will also have a threshold loss when transmitting a high-level signal. Then, for the case where each transistor of the shift register is an N-type transistor and the low-level signal of the shift register is at the output stage, the shift register is at The high-level signal output during the reset phase also has a threshold loss.
- a first level signal for example, a low level signal
- the sub-circuit 2 is transmitted to the second node N2; the first pull-up control sub-circuit 3 transmits a second level signal (for example, a high-level signal) provided by the second clock terminal CB to the intermediate output terminal GOUT; the first pull-down
- the control sub-circuit 5 transmits the first level signal of the first level terminal VGL to the third node N3 under the control of the first level signal of the third clock terminal CLK, so that the pull-down transistor Tp is turned on, and the final output terminal EOUT A low-level signal is received from the first level terminal VGL.
- the second node N2 keeps a low potential under the voltage regulation action of the first voltage regulator sub-circuit 2, so that the first pull-up control sub-circuit 3 transmits the low-level signal of the second clock terminal CB to the middle
- the first pull-down control sub-circuit 5 transmits the second level signal (high level signal) of the second level terminal VGH to the third node N3;
- the pull-up sub-circuit 4 transmits the high-level signal of the second level terminal VGH to the final output terminal EOUT.
- the first pull-down control sub-circuit 5 transmits the low-level signal of the first level terminal VGL to the third node N3, so that the pull-down transistor Tp is turned on, and the final output terminal EOUT receives the low-level signal of the first level terminal VGL.
- the third node N3 is further reduced on the basis of the low potential at the beginning of the reset stage, thereby ensuring that the pull-down transistor Tp can be fully turned on, so that the final output terminal EOUT can output a low-level signal without a threshold loss.
- the first level signal is a -7V signal
- the second level signal is a + 7V signal
- the threshold voltage of the pull-down transistor Tp is -1V.
- the -7V signal provided by the input terminal IN is transmitted to the second node N2 through the input sub-circuit 1 and the first voltage regulator sub-circuit 2; at this time If the input sub-circuit 1 includes a transistor with a threshold voltage of -1V, the potential of the second node N2 reaches -7+
- -6V.
- the first pull-down control sub-circuit 5 turns on the second level terminal VGH and the third node N3, and the third node N3 reaches a potential of + 7V; in addition, Under the control of the potential of the intermediate output terminal GOUT, the pull-up sub-circuit 4 turns on the second level terminal VGH and the final output terminal EOUT, and the final output terminal EOUT reaches a potential of + 7V, so that the final output terminal EOUT and the third node N3 The voltage between them is 0V.
- FIG. 2 is a schematic block diagram of a shift register according to an embodiment of the present disclosure. As shown in FIG. 2, the shift register further includes a second pull-up control sub-circuit compared to the shift register described with reference to FIG. 1. 7. The third voltage regulator sub-circuit 8, the third pull-up control sub-circuit 9 and the second pull-down control sub-circuit 10.
- the second pull-up control sub-circuit 7 is connected to the first clock terminal CK, the first node N1, the first level terminal VGL, and the fourth node N4, and is used to connect the first clock terminal in response to the potential of the first node N1 in the output stage.
- the second level signal provided by CK is transmitted to the fourth node N4; in the first pull-down phase, the first level terminal VGL and the fourth node N4 are turned on in response to the first level signal of the first clock terminal CK.
- the third voltage stabilizing sub-circuit 8 is connected to the second level terminal VGH and the fourth node N4, and is used to stabilize the voltage between the second level terminal VGH and the fourth node N4.
- the fourth node N4 is a connection node between the second pull-up control sub-circuit 7 and the third voltage stabilizing sub-circuit 8.
- the third pull-up control sub-circuit 9 is connected to the fourth node N4, the second level terminal VGH, and the intermediate output terminal GOUT, and is configured to respond to the potential of the fourth node N4 during the first pull-down phase and the second pull-down phase,
- the level terminal VGH is in conduction with the intermediate output terminal GOUT.
- the second pull-down control sub-circuit 10 is connected to the intermediate output terminal GOUT, the third node N3, and the fourth clock terminal CLB. In response to the potentials of the fourth node N4 and the intermediate output terminal GOUT, the second pull-down control sub-circuit 10 is used for The voltage between the third node N3 and the fourth clock terminal CLB is stored; and the signal provided at the fourth clock terminal CLB is changed from the second level signal in the first pull-down phase to the first level in the second pull-down phase. Signal, stabilize the voltage between the third node N3 and the fourth clock terminal CLB.
- the working process of the shift register in FIG. 2 is described below by taking the first level signal as a low potential and the second level signal as a high potential as an example.
- the first node N1 reaches a low potential (see the description above).
- the second pull-up control sub-circuit 7 sends a high-level signal provided by the first clock terminal CK It is transmitted to the fourth node N4; at this time, the third pull-up control sub-circuit 9 does not electrically connect the second level terminal VGH to the intermediate output terminal GOUT, thereby ensuring the low potential of the intermediate output terminal GOUT in the output stage.
- the second pull-up control sub-circuit 7 transmits the low-level signal of the first level terminal VGL to the fourth node N4.
- the third pull-up control sub-circuit 9 sends the first The high-level signal of the two-level terminal VGH is transmitted to the intermediate output terminal GOUT, thereby preventing the final output terminal EOUT from being electrically connected to the second-level terminal VGH through the pull-up sub-circuit 4; in addition, the third node N3 is in the second voltage-regulating sub-circuit.
- the low potential of the previous stage is maintained under the voltage regulation of 6, and under the common control of the low potential of the third node N3 and the low potential of the fourth node N4, the second pull-down control sub-circuit 10 connects the fourth clock terminal CLB and The voltage between the third node N3 is stabilized to the current state.
- the third node N3 starts to keep the low potential in the first pull-down phase, and the fourth node N4 keeps the low potential under the voltage regulation action of the third voltage regulator sub-circuit 8;
- the second pull-down control sub-circuit 10 stabilizes the potential between the fourth clock terminal CLB and the third node N3 to be the same as the first pull-down stage;
- the signal transitions from a high level in the first pull-down phase to a low-level signal in the second pull-down phase. Therefore, the potential of the third node N3 will decrease accordingly.
- the first pull-down phase and the second pull-down phase can be alternately performed, so as to periodically pull the third node N3 to a lower potential to prevent the potential of the third node N3 from rising due to the transistor leakage. Therefore, the figure The shift register of 2 can keep the third node N3 at a lower potential than the first level terminal VGL after the reset stage, thereby ensuring that the pull-down transistor Tp is fully turned on, and the final output terminal EOUT outputs a low-level signal without a threshold loss. .
- the shift register of FIG. 2 can maintain the third node N3 at the same or lower potential than the reset stage to prevent the pull-down transistor Tp from being turned on due to the leakage of the third node N3. The phenomenon.
- the first-level signal is a signal of -7V
- the second-level signal is a signal of + 7V
- the threshold voltage of the pull-down transistor Tp is -1V.
- the potential of the third node N3 is further reduced to -20V on the basis of -7V, thereby ensuring that the pull-down transistor Tp can be fully turned on.
- the second pull-up control sub-circuit 7 transmits a signal of -7V of the first level terminal VGL to the fourth node N4.
- the intermediate output terminal GOUT is received by the third pull-up control sub-circuit 9 To the + 7V signal provided by the second level terminal VGH; in addition, the third node N3 maintains the potential of -20V in the previous stage under the voltage regulation of the second voltage regulator circuit 6; and the third node N3 and the fourth node Under the common control of the low potential of the node N4, the second pull-down control sub-circuit 10 stabilizes the voltage between the fourth clock terminal CLB and the third node N3 to the current state.
- the signal voltage provided by the fourth clock terminal CLB jumps from + 7V in the first pull-down phase to -7V in the second pull-down phase, thereby further reducing the potential of the third node N3 to reach -20.
- -(7 + 7) -27V.
- the shift register further includes a fourth pull-up control sub-circuit 11, the fourth pull-up control sub-circuit 11 and the fourth node N4, the second clock terminal CB, the first node N1, and the second power
- the flat terminal VGH is connected, and is used to electrically connect the second level terminal VGH to the first node N1 in response to the control of the potential of the fourth node N4 and the first level signal provided by the second clock terminal CB in the second pull-down stage.
- the fourth pull-up control sub-circuit 11 can ensure that the first node N1 and the second node N2 are at a high potential during the second pull-down stage, thereby ensuring that the second clock terminal CB is disconnected from the intermediate output terminal GOUT, preventing the intermediate output terminal GOUT from being subject to The effect of the low-level signal of the second clock terminal CB.
- FIG. 3 is a schematic circuit diagram of a shift register according to an embodiment of the present disclosure, which illustrates a specific implementation of the shift register of FIG. 2. The structure of the shift register according to the embodiment of the present disclosure is described below with reference to FIG. 3.
- the input sub-circuit 1 includes a first transistor T1, a gate of the first transistor T1 is connected to the first clock terminal CK, a first pole of the first transistor T1 is connected to the input terminal IN of the shift register, The second pole is connected to the first node N1.
- the first voltage regulator circuit 2 includes a first capacitor C1 and a second transistor T2.
- the first terminal of the first capacitor C1 is connected to the second node N2, and the second terminal is connected to the intermediate output terminal GOUT.
- the gate of the second transistor T2 is connected to the first level terminal VGL, the first pole of the second transistor T2 is connected to the second node N2, and the second pole of the second transistor T2 is connected to the first node N1.
- the first pull-up control sub-circuit 3 includes a third transistor T3, the gate of the third transistor T3 is connected to the second node N2, the first electrode of the third transistor T3 is connected to the intermediate output terminal GOUT, and the second of the third transistor T3 is The pole is connected to the second clock terminal CB.
- the pull-up sub-circuit 4 includes a fourth transistor T4, the gate of the fourth transistor T4 is connected to the intermediate output terminal GOUT, the first pole of the fourth transistor T4 is connected to the second level terminal VGH, and the second pole of the fourth transistor T4 is connected to The final output EOUT is connected.
- the first pull-down control sub-circuit 5 includes a fifth transistor T5 and a sixth transistor T6.
- the gate of the fifth transistor T5 is connected to the intermediate output terminal GOUT, the first pole of the fifth transistor T5 is connected to the second level terminal VGH, and the second pole of the fifth transistor T5 is connected to the third node N3.
- the gate of the sixth transistor T6 is connected to the third clock terminal CLK, the first electrode of the sixth transistor T6 is connected to the third node N3, and the second electrode of the sixth transistor T6 is connected to the first level terminal VGL.
- the second voltage regulator circuit 6 includes a second capacitor C2 and a seventh transistor T7.
- the gate of the seventh transistor T7 is connected to the lower node connection terminal Next.
- the first pole of the seventh transistor T7 is adjacent to the final output terminal EOUT.
- the second pole of the seventh transistor T7 is connected to the first terminal of the second capacitor C2.
- the second end of the second capacitor C2 is connected to the third node N3.
- the second pull-up control sub-circuit 7 includes an eighth transistor T8 and a ninth transistor T9.
- the gate of the eighth transistor T8 is connected to the first clock terminal CK
- the first pole of the eighth transistor T8 is connected to the first level terminal VGL
- the second pole of the eighth transistor T8 is connected to the fourth node N4.
- the gate of the ninth transistor T9 is connected to the first node N1
- the first pole of the ninth transistor T9 is connected to the fourth node N4
- the second pole of the ninth transistor T9 is connected to the first clock terminal CK.
- the third voltage regulator sub-circuit 8 includes a third capacitor C3. A first terminal of the third capacitor C3 is connected to the fourth node N4, and a second terminal is connected to the second level terminal VGH.
- the third pull-up control sub-circuit 9 includes a tenth transistor T10, a gate of the tenth transistor T10 is connected to the fourth node N4, a first pole of the tenth transistor T10 is connected to the second level terminal VGH, The two poles are connected to the intermediate output terminal GOUT.
- the second pull-down control sub-circuit 10 includes an eleventh transistor T11, a twelfth transistor T12, and a fourth capacitor C4.
- the gate of the eleventh transistor T11 is connected to the fourth node N4, the first pole of the eleventh transistor T11 is connected to the first end of the fourth capacitor C4, and the second pole of the eleventh transistor T11 is connected to the twelfth.
- the first pole of the transistor T12 is connected.
- the gate of the twelfth transistor T12 and the second terminal of the fourth capacitor C4 are both connected to the third node N3, and the second electrode of the twelfth transistor T12 is connected to the fourth clock terminal CLB.
- the fourth pull-up control sub-circuit 11 includes a thirteenth transistor T13 and a fourteenth transistor T14.
- the gate of the thirteenth transistor T13 is connected to the fourth node N4, the first pole of the thirteenth transistor T13 is connected to the second level terminal VGH, and the second pole of the thirteenth transistor T13 is connected to the fourteenth transistor.
- the first pole of T14 is connected.
- the gate of the fourteenth transistor T14 is connected to the second clock terminal CB, and the second pole of the fourteenth transistor is connected to the first node N1.
- each transistor in the shift register of the present disclosure is a P-type transistor.
- each transistor is a P-type transistor.
- the first level terminal VGL provides a low-level signal
- the second level terminal VGH provides a high-level signal.
- the voltage of the low-level signal is VL
- the voltage of the high-level signal is VH.
- FIG. 4 is a working timing diagram of the shift register provided by the present disclosure.
- the working process of the shift register includes: an input stage t1, an output stage t2, a reset stage t3, a first pull-down stage t4, and a first stage.
- the two pull-down phases t5, the first pull-down phase t4 and the second pull-down phase t5 are alternately performed after the reset phase t3.
- the input terminal IN of the shift register receives a low-level signal
- the first clock terminal CK provides a low-level signal
- the second clock terminal CB provides a high-level signal
- the third clock terminal CLK provides a low Signal
- the fourth clock terminal CLB provides a high-level signal.
- the first transistor T1 Under the control of the low-level signal provided by the first clock terminal CK, the first transistor T1 is turned on; under the control of the low-level signal provided by the first voltage terminal VGL, the second transistor T2 is turned on, and the input terminal IN and the first The node N1 and the second node N2 are electrically connected. Because the P-type transistor is fully turned on when the gate potential is less than the source potential and the difference is at least the transistor threshold (that is, the P-type transistor will have a threshold loss when transmitting a low-level signal), therefore, the The potential is VL +
- , VL is the voltage of the low-level signal provided by the input terminal IN, and
- the second transistor T2 Since the potential of the first level terminal VGL is lower than the potential of the first node N1, the second transistor T2 is fully turned on, and the potential of the second node N2 reaches VL +
- the fifth transistor T5 is turned off; and the sixth transistor T6 is turned on under the control of a low-level signal provided by the third clock terminal CLK, thereby turning the low voltage of the first level terminal VGL
- the flat signal is transmitted to the third node N3, and then the pull-down transistor Tp is controlled to be turned on.
- the output terminal EOUT receives the low-level signal of the first level terminal VGL.
- the third node N3 receives the low-level signal of the first level terminal VGL through the sixth transistor T6 during the input phase, and after the first display period, the third node N3 is in the input phase
- the potential at the end of the previous display period is maintained (the potential is lower than the low level of the first level terminal VGL, see the description below for details).
- the input terminal IN of the shift register receives a high-level signal
- the first clock terminal CK and the third clock terminal CLK provide a high-level signal
- the second clock terminal CB and the fourth clock terminal CLB provide a low voltage.
- Level signal; the next-level node connection terminal Next provides a low-level signal.
- the first transistor T1 is turned off, and the third transistor T3 transmits the low-level signal of the second clock terminal CB to the intermediate output terminal GOUT. Because the potential of the intermediate output terminal GOUT is reduced relative to the input stage t1, the potential of the second node N2 is further reduced to reach 2VL +
- the sixth transistor T6 Under the control of the high-level signal of the third clock terminal CLK, the sixth transistor T6 is turned off. Since the intermediate output terminal GOUT reaches a low potential, the fourth transistor T4 and the fifth transistor T5 are both turned on, and the third node N3 and the final output terminal EOUT receive the high-level signal of the second level terminal VGH. At the same time, the seventh transistor T7 is turned on under the control of the low-level signal provided by the lower node connection terminal Next, and the potentials at the two ends of the second capacitor C2 are respectively the same as the potentials at the final output terminal EOUT and the third node N3.
- the first node N1 maintains the low potential of the previous stage, so that the ninth transistor T9 is turned on, and the high-level signal of the first clock terminal CK is transmitted.
- the tenth transistor T10 and the eleventh transistor T11 are both turned off to prevent the high-level signal of the second signal terminal VGH from affecting the potential of the intermediate output terminal GOUT and the first The influence of the four clock terminals CLKB on the potential of the third node N3.
- the input terminal IN of the shift register receives a high-level signal.
- the first clock terminal CK, the second clock terminal CB, and the fourth clock terminal CLKB all provide a high-level signal, and the third clock terminal CLK provides a low-level signal.
- Level signal; the low-level node connection terminal provides a low-level signal.
- the first transistor T1 and the second transistor T2 are both turned off, and the third transistor T3 is turned on.
- the high-level signal of the second clock terminal CB is transmitted to the intermediate output terminal GOUT.
- both the fourth transistor T4 and the fifth transistor T5 are turned off.
- the sixth transistor T6 is turned on under the control of the high-level signal provided by the third clock terminal CLK, so that the third node N3 is electrically connected to the first level terminal VGL to reach a low potential.
- the pull-down transistor Tp is turned on to electrically connect the final output terminal EOUT to the first level terminal VGL, so that the potential of the final output terminal EOUT is lowered compared to the output stage t2.
- the seventh transistor T7 is turned on under the control of the low-level signal provided by the connection node of the lower node, so that the potential of the first terminal of the second capacitor C2 is lower than that of the output stage t2.
- the potential of the third node N3 (that is, the second terminal of the second capacitor C2) will be further reduced to below VL, thereby ensuring that the pull-down transistor Tp is more fully turned on, so that the final output EOUT output has no threshold loss Low-level signals.
- the input terminal IN of the shift register receives a high-level signal
- the first clock terminal CK and the third clock terminal CLK both provide a low-level signal
- the second clock terminal CB and the fourth clock terminal CLB provides high-level signals
- the next-level node connection Next provides low-level signals.
- the first clock terminal CK provides a low-level signal
- the first transistor T1 is turned on, and the high-level signal at the input terminal IN is transmitted to the first node N1; and the second transistor T2 is turned on under the control of the first signal terminal VGL , So that the second node N2 receives the high-level signal of the input terminal IN, and then turns off the third transistor T3.
- the eighth transistor T8 is turned on under the control of the low-level signal provided by the first clock terminal CK, thereby transmitting the low-level signal of the first level terminal VGL to the fourth node N4.
- the tenth transistor T10 is turned on to transmit the high-level signal of the second level terminal VGH to the intermediate output terminal GOUT, so that both the fourth transistor T4 and the fifth transistor T5 are turned off .
- the seventh transistor T7 is kept on under the control of the low-level signal provided by the lower node connection terminal Next, and the second capacitor C2 keeps the third node N3 at a low potential in the reset stage t3, so that the twelfth transistor T12 is turned on. Because the fourth node N4 is in a low potential state, the eleventh transistor T11 is turned on. At this time, the fourth capacitor C4 stores the potential difference between the third node N3 and the high-level signal provided by the fourth clock terminal CLB.
- the input terminal IN of the shift register receives a high-level signal
- the first clock terminal CK and the third clock terminal CLK both provide a high-level signal
- the second clock terminal CB and the fourth clock terminal CLB Both provide low-level signals
- Next-level node connection terminal Next provides high-level signals.
- the eighth transistor T8 and the first transistor T1 are both turned off; under the voltage regulation of the first capacitor C1, the first node N1 remains before the first pull-down stage t4 High potential, so that the ninth transistor T9 is also turned off; under the voltage regulation of the third capacitor C3, the fourth node N4 maintains the low potential in the first pull-down stage t4. In addition, under the stabilized voltage of the fourth capacitor C4, the third node N3 first maintains the low potential of the first pull-down stage t4.
- the eleventh transistor T11 is turned on and the twelfth transistor T12 is turned on.
- the first terminal of the fourth capacitor C4 receives the low-level signal of the fourth clock terminal CLB. . Since the potential of the first terminal of the fourth capacitor C4 is lower than that of the first pull-down stage, the potential of the second terminal of the fourth capacitor C4 (that is, the third node N3) will also decrease accordingly, reaching The state of the low potential during the pull-down phase t4 is lower, thereby ensuring that the pull-down transistor Tp is fully turned on, and then the final output terminal EOUT outputs a low-level signal without a threshold loss.
- the thirteenth transistor T13 is turned on under the control of the low potential of the fourth node N4, and the fourteenth transistor T14 is a low-level signal provided by the second clock terminal CB.
- the first pull-down phase t4 and the second pull-down phase t5 may be alternately performed after the reset phase t3, until the input terminal IN of the shift register receives a low-level signal again and enters the next cycle.
- FIG. 5 is a flowchart of a method for driving a shift register according to an embodiment of the present disclosure.
- the shift register uses the above-mentioned shift register. As shown in FIG. 5, the driving method includes steps S1-S3.
- step S1 in the input stage, an input sub-circuit electrically connects the input end of the shift register with the first node; a first voltage-regulating sub-circuit electrically connects the first node with the second node, and A first pull-up control sub-circuit transmits a second level signal provided by the second clock terminal to an intermediate output terminal; the first pull-down control sub-circuit electrically connects the first level terminal to the third node Connection; the pull-down transistor electrically connects the first level terminal to the final output terminal.
- step S2 in the output stage, the first pull-up control sub-circuit transmits the first level signal provided by the second clock terminal to the intermediate output terminal; the pull-up sub-circuit transmits the second level terminal And is electrically connected to the final output terminal.
- step S3 in the reset phase, the first pull-up control sub-circuit transmits a second level signal provided by the second clock terminal to an intermediate output terminal; the first pull-down control sub-circuit transmits the first A level terminal is electrically connected to the third node; the pull-down transistor electrically connects the first level terminal to a final output terminal; and the second voltage regulator circuit connects the voltage between the final output terminal and the third node Stability remains the same as in the output phase.
- the shift register further includes a second pull-up control sub-circuit, a third regulator sub-circuit, a third pull-up control sub-circuit, and a second pull-down control sub-circuit, in the output stage in step S2, the second pull-up control sub-circuit
- the pull control sub-circuit transmits the second-level signal provided by the first clock terminal to the fourth node.
- the driving method further includes steps S4 and S5 performed after the reset phase.
- step S4 in the first pull-down stage, the second pull-up control sub-circuit electrically connects the first level terminal to the fourth node.
- step S5 in the second pull-down stage, the third voltage regulator sub-circuit keeps the potential of the fourth node the same as that in the first pull-down stage; the second pull-down control sub-circuit holds the third node and The voltage between the fourth clock terminals remains the same as the previous first pull-down stage.
- the first pull-down phase and the second pull-down phase are alternately performed until the next cycle.
- the shift register further includes a fourth pull-up control sub-circuit
- the fourth pull-up control sub-circuit electrically connects the second level terminal to the first node to ensure that the first node is at a high potential .
- FIG. 6 is a schematic structural diagram of a gate driving circuit according to an embodiment of the present disclosure.
- the gate driving circuit includes cascaded n shift registers GOA_1, GOA_2, ..., GOA_n-1, GOA_n.
- the shift register adopts any of the above-mentioned shift registers.
- the final output terminals EOUT of the shift registers at each level are respectively connected to the gate lines G1, G2,... Gn one by one. Except for the last-stage shift register GOA_n, the intermediate output terminal GOUT of each of the remaining shift registers GOA_1 to GOA_n-1 is connected to the input terminal IN of the next-stage shift register. In addition, except for the last-stage shift register GOA_n, the lower node connection end Next of each of the remaining shift registers GOA_1 to GOA_n-1 is connected to the first node N1 of the next-stage shift register, thereby not increasing In the case of an extra power signal, the upper and lower signals are used to achieve a low-level output without a threshold loss in the upper shift register.
- the input terminal IN of the first stage shift register GOA_1 is connected to the start of the frame STV, and the signal of the next node connection terminal Next of the last stage shift register GOA_n is connected to the signal terminal END.
- the output stage, reset stage, and first pull-down stage of the shift register GOA_n provide low-level signals.
- the gate driving circuit may further include a first clock signal line CKL, a second clock signal line CBL, a third clock signal line CLKL, and a fourth clock signal line CLBL, all of which are used to provide a clock signal.
- the first clock terminal CK of the odd-stage shift register and the second clock terminal CB of the even-stage shift register are connected to the first clock signal line CKL, and the second clock terminal CB of the odd-stage shift register and the even-stage shift
- the first clock terminal CK of the bit register is connected to the second clock signal line CBL, and the third clock terminal CLK of the odd-numbered shift register and the fourth clock terminal CLB of the even-numbered shift register are connected to the third clock signal line CBL.
- the fourth clock terminal CLB of the odd-numbered stage shift register and the third clock terminal CLK of the even-numbered stage shift register are connected to the fourth clock signal line CLKL.
- the final output terminal of the shift register outputs a low-level signal only when the second clock terminal CB provides a low-level signal, when one of the first clock signal line CKL and the second clock signal line CBL is provided
- the final output terminal of the first-stage shift register outputs a high-level signal. For example, if the final output terminal of the first-stage shift register outputs a high-level signal at t2 in FIG. 4, the final output terminal of the second-stage shift register outputs a high-level signal at t4, and the third stage shifts The final output of the bit register outputs a high-level signal during the second t4 phase, and so on.
- the setting of the interval stage t0 can make the output stages of the shift registers at all levels evenly distributed. It should be noted that, the present disclosure does not limit the duty cycle of the clock signals provided by the clock signal lines CKL, CBL, CLKL, and CLBL, as long as the intervals between the output stages of the shift registers at all levels are the same.
- the gate driving circuit provided by the embodiment of the present disclosure can use the signals of the upper and lower shift registers to realize the output low-level signal of the shift register without threshold loss, and has a simple structure.
- An embodiment of the present disclosure provides a display device including the above gate driving circuit.
Abstract
Description
Claims (21)
- 一种移位寄存器,包括:输入子电路,与所述移位寄存器的输入端、第一时钟端和第一节点相连,用于在输入阶段响应于所述第一时钟端提供的第一电平信号,将所述输入端与所述第一节点电连接;控制子电路,与所述第一节点、所述移位寄存器的中间输出端、第二时钟端、第三节点、第三时钟端、提供第二电平信号的第二电平端和提供第一电平信号的第一电平端相连,用于根据所述第一节点的电平,在所述输入阶段、输出阶段和复位阶段将所述第二时钟端提供的信号传输至所述中间输出端,并且根据所述中间输出端的电位和所述第三时钟端提供的信号控制所述第三节点的电位;上拉子电路,与所述中间输出端、所述移位寄存器的最终输出端和所述第二电平端相连,用于在所述输出阶段响应于所述中间输出端的电位,将所述第二电平端与所述最终输出端电连接;第一稳压子电路,与下级节点连接端、所述最终输出端和所述第三节点相连,用于在所述输出阶段和所述复位阶段响应于所述下级节点连接端提供的第一电平信号,稳定所述最终输出端与所述第三节点之间的电压;下拉晶体管,其栅极与所述第三节点相连,第一极与所述第一电平端相连,第二极与所述最终输出端相连,其中,所述第一稳压子电路在所述复位阶段将所述第三节点的电位降低至低于所述第一电平端提供的第一电平信号的电平。
- 根据权利要求1所述的移位寄存器,其中,所述第一稳压子电路还用于在所述复位阶段之后的第一下拉阶段响应于所述下级节点连接端提供的第一电平信号,稳定所述最终输出端与所述第三节点之间的电压。
- 根据权利要求1或2所述的移位寄存器,其中,所述控制子 电路包括:第二稳压子电路,与所述第一节点、第二节点和所述中间输出端相连,用于在所述输入阶段将所述第一节点与所述第二节点电连接,并稳定所述第二节点和所述中间输出端之间的电压;第一上拉控制子电路,与所述中间输出端、所述第二节点和所述第二时钟端相连,响应于所述第二节点的电位,用于在所述输入阶段和所述复位阶段将所述第二时钟端提供的第二电平信号传输至所述中间输出端;并在所述输出阶段将所述第二时钟端提供的第一电平信号传输至所述中间输出端;第一下拉控制子电路,与所述中间输出端、所述第三节点、所述第三时钟端、所述第二电平端和所述第一电平端相连,用于在所述输出阶段响应于所述中间输出端的电位,将所述第二电平端与所述第三节点电连接;并在所述输入阶段和所述复位阶段响应于所述第三时钟端提供的第一电平信号,将所述第一电平端与所述第三节点电连接。
- 根据权利要求1至3中任一项所述的移位寄存器,还包括:第二上拉控制子电路,与所述第一时钟端、所述第一节点、所述第一电平端和第四节点相连,用于在所述输出阶段响应于所述第一节点的电位,将所述第一时钟端提供的第二电平信号传输至所述第四节点;并在所述第一下拉阶段响应于所述第一时钟端提供的第一电平信号的控制,将所述第一电平端与所述第四节点电连接;第三上拉控制子电路,与所述第四节点、所述第二电平端和所述中间输出端相连,用于在所述第一下拉阶段和第二下拉阶段响应于所述第四节点电位,将所述第二电平端与所述中间输出端电连接;第二下拉控制子电路,与所述中间输出端、所述第三节点和第四时钟端相连,响应于所述第四节点和所述中间输出端的电位,用于在所述第四时钟端提供的信号从所述第一下拉阶段的第二电平信号变为所述第二下拉阶段的第一电平信号时,稳定所述第三节点和所述第四时钟端之间的电压。
- 根据权利要求1至4中任一项所述的移位寄存器,其中,所述输入子电路包括第一晶体管,所述第一晶体管的栅极与所述第一时钟端相连,所述第一晶体管的第一极与所述移位寄存器的输入端相连,所述第一晶体管的第二极与所述第一节点相连。
- 根据权利要求3至5中任一项所述的移位寄存器,其中,所述第二稳压子电路包括第一电容和第二晶体管,所述第一电容的第一端与所述第二节点相连,所述第一电容的第二端与所述中间输出端相连;所述第二晶体管的栅极与所述第一电平端相连,所述第二晶体管的第一极与所述第二节点相连,所述第二晶体管的第二极与所述第一节点相连。
- 根据权利要求3至5中任一项所述的移位寄存器,其中,所述第一上拉控制子电路包括第三晶体管,所述第三晶体管的栅极与所述第二节点相连,所述第三晶体管的第一极与所述中间输出端相连,所述第三晶体管的第二极与所述第二时钟端相连。
- 根据权利要求1至7中任一项所述的移位寄存器,其中,所述上拉子电路包括第四晶体管,所述第四晶体管的栅极与所述中间输出端相连,所述第四晶体管的第一极与所述第二电平端相连,所述第四晶体管的第二极与所述最终输出端相连。
- 根据权利要求3至8中任一项所述的移位寄存器,其中,所述第一下拉控制子电路包括第五晶体管和第六晶体管,所述第五晶体管的栅极与所述中间输出端相连,所述第五晶体管的第一极与所述第二电平端相连,所述第五晶体管的第二极与所述第三节点相连;所述第六晶体管的栅极与所述第三时钟端相连,所述第六晶体 管的第一极与所述第三节点相连,所述第六晶体管的第二极与所述第一电平端相连。
- 根据权利要求1至9中任一项所述的移位寄存器,其中,所述第一稳压子电路包括第二电容和第七晶体管,所述第七晶体管的栅极与所述下级节点连接端相连,所述第七晶体管的第一极与所述最终输出端相邻,所述第七晶体管的第二极与所述第二电容的第一端相连,所述第二电容的第二端与所述第三节点相连。
- 根据权利要求4所述的移位寄存器,其中,所述第二上拉控制子电路包括第八晶体管和第九晶体管,所述第八晶体管的栅极与所述第一时钟端相连,所述第八晶体管的第一极与所述第一电平端相连,所述第八晶体管的第二极与所述第四节点相连;所述第九晶体管的栅极与所述第一节点相连,所述第九晶体管的第一极与所述第四节点相连,所述第九晶体管的第二极与所述第一时钟端相连。
- 根据权利要求4或11所述的移位寄存器,还包括:第三稳压子电路,与所述第二电平端和所述第四节点相连,用于稳定所述第二电平端与所述第四节点之间的电压。
- 根据权利要求12所述的移位寄存器,其中,所述第三稳压子电路包括第三电容,所述第三电容的第一端与所述第四节点相连,所述第三电容的第二端与所述第二电平端相连。
- 根据权利要求4和11-13中任一项所述的移位寄存器,其中,所述第三上拉控制子电路包括第十晶体管,所述第十晶体管的栅极与所述第四节点相连,所述第十晶体管的第一极与所述第二电平端 相连,所述第十晶体管的第二极与所述中间输出端相连。
- 根据权利要求4和11-14中任一项所述的移位寄存器,其中,所述第二下拉控制子电路包括第十一晶体管、第十二晶体管和第四电容,所述第十一晶体管的栅极与所述第四节点相连,所述第十一晶体管的第一极与所述第四电容的第一端相连,所述第十一晶体管的第二极与所述第十二晶体管的第一极相连;所述第十二晶体管的栅极和所述第四电容的第二端均与所述第三节点相连,所述第十二晶体管的第二极与所述第四时钟端相连。
- 根据权利要求4和11-15中任一项所述移位寄存器,还包括第四上拉控制子电路,所述第四上拉控制子电路与所述第四节点、所述第二时钟端、所述第一节点和所述第二电平端相连,用于在所述第二下拉阶段响应于所述第四节点的电位和所述第二时钟端提供的第一电平信号的控制,将所述第二电平端与所述第一节点电连接。
- 根据权利要求16所述移位寄存器,其中,所述第四上拉控制子电路包括第十三晶体管和第十四晶体管,所述第十三晶体管的栅极与所述第四节点相连,所述第十三晶体管的第一极与所述第二电平端相连,所述第十三晶体管的第二极与所述第十四晶体管的第一极相连;所述第十四晶体管的栅极与所述第二时钟端相连,所述第十四晶体管的第二极与所述第一节点相连。
- 一种移位寄存器的驱动方法,所述移位寄存器包括:输入子电路,与所述移位寄存器的输入端、第一时钟端和第一节点相连;控制子电路,与所述第一节点、所述移位寄存器的中间输出端、 第二时钟端、第三节点、第三时钟端、提供第二电平信号的第二电平端和提供第一电平信号的第一电平端相连;上拉子电路,与所述中间输出端、所述移位寄存器的最终输出端和所述第二电平端相连;第一稳压子电路,与下级节点连接端、所述最终输出端和所述第三节点相连;下拉晶体管,其栅极与所述第三节点相连,第一极与所述第一电平端相连,第二极与所述最终输出端相连,所述驱动方法包括:在输入阶段,向所述第一时钟端提供第一电平信号,向所述输入端提供第一电平信号,向所述第二时钟端提供第二电平信号,向所述第三时钟端提供第一电平信号,所述输入子电路将移位寄存器的输入端与所述第一节点电连接,所述控制子电路将所述第二时钟端提供的第二电平信号传输至中间输出端并且将所述第一电平端与所述第三节点电连接;所述下拉晶体管将所述第一电平端与所述最终输出端电连接;在输出阶段,向所述第一时钟端提供第二电平信号,向所述第二时钟端提供第一电平信号,向所述第三时钟端提供第二电平信号,所述控制子电路将所述第二时钟端提供的第一电平信号传输至中间输出端;所述上拉子电路将所述第二电平端与所述最终输出端电连接;在复位阶段,向所述第一时钟端提供第二电平信号,向所述第二时钟端提供第二电平信号,向所述第三时钟端提供第一电平信号,所述第一上拉控制子电路将所述第二时钟端提供的第二电平信号传输至中间输出端;所述第一下拉控制子电路将所述第一电平端与所述第三节点电连接;所述下拉晶体管将第一电平端与最终输出端电连接;所述第一稳压子电路将所述第三节点的电位降低至低于所述第一电平端提供的第一电平信号的电平。
- 根据权利要求18所述的驱动方法,其中,所述移位寄存器 还包括:第二上拉控制子电路,与所述第一时钟端、所述第一节点、所述第一电平端和第四节点相连;第三上拉控制子电路,与所述第四节点、所述第二电平端和所述中间输出端相连;第二下拉控制子电路,与所述中间输出端、所述第三节点和第四时钟端相连;第三稳压子电路,与所述第二电平端和所述第四节点相连,所述驱动方法还包括:在所述输出阶段,所述第二上拉控制子电路将所述第一时钟端提供的第二电平信号传输至所述第四节点;并且在所述复位阶段之后:在第一下拉阶段,向所述第一时钟端提供第一电平信号,向所述第二时钟端提供第二电平信号,向所述第三时钟端提供第一电平信号,所述第二上拉控制子电路将所述第一电平端与所述第四节点电连接;在第二下拉阶段,向所述第一时钟端提供第二电平信号,向所述第二时钟端提供第一电平信号,向所述第三时钟端提供第二电平信号,所述第三稳压子电路将所述第四节点的电位保持与第一下拉阶段相同;所述第二下拉控制子电路将所述第三节点和第四时钟端之间的电压保持与之前的第一下拉阶段相同;其中,所述第一下拉阶段和所述第二下拉阶段交替进行。
- 一种栅极驱动电路,包括级联的N个移位寄存器,每个所述移位寄存器为权利要求1至17中任意一项所述的移位寄存器;第1至第(N-1)移位寄存器中的每一个的中间输出端与下一级移位寄存器的输入端相连,并且第1至第(N-1)移位寄存器中的每一个的下级节点连接端与下一级移位寄存器的第一节点相连。
- 一种显示装置,包括权利要求20所述的栅极驱动电路。
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US11468922B2 (en) | 2022-10-11 |
CN110176204A (zh) | 2019-08-27 |
US20210174846A1 (en) | 2021-06-10 |
US10964359B2 (en) | 2021-03-30 |
US20200265877A1 (en) | 2020-08-20 |
CN110176204B (zh) | 2021-01-26 |
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