# US 2021/0241708 A1 · Shift register and driving method therefor, gate driver circuit, and display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0241708 A1 - Document ID: US20210241708A1 - Status: Published application - Kind: A1 - Application number: 17/051,722 - Filed: 2020-01-13 - Published: 2021-08-05 - Earliest claimed: 2019-01-18 - Assignees: Chongqing Boe Optoelectronics Technology Co., Ltd.; Boe Technology Group Co., Ltd. - Applicants: Chongqing Boe Optoelectronics Technology Co., Ltd.; Boe Technology Group Co., Ltd. - Inventors: Xun PU; Junhui WU; Jiandong GUO - Web page: https://patentgrep.com/patent/US20210241708A1 ## CPC - G09G 3/3677: {suitable for active matrices only} - G09G 3/3266: Details of drivers for scan electrodes - G11C 19/28: using semiconductor elements (G11C19/14, G11C19/36 take precedence) - G09G 2310/0286: Details of a shift registers arranged for use in a driving circuit - G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00) - G11C: STATIC STORES (semiconductor memory devices H10B) ## Abstract A shift register includes a pull-up node, an output control sub-circuit, a first energy storage sub-circuit and an output sub-circuit. The output control sub-circuit is coupled to the pull-up node, a first clock signal terminal and the first energy storage sub-circuit, and is configured to transmit a first clock signal to the first energy storage sub-circuit under control of a voltage of the pull-up node. The first energy storage sub-circuit is coupled to the pull-up node and the output control sub-circuit, and is configured to store the voltage of the pull-up node, and boost the voltage of the pull-up node under action of the first clock signal. The output sub-circuit is coupled to the pull-up node and a signal output terminal, and is configured to transmit the boosted voltage of the pull-up node to the signal output terminal under the control of the voltage of the pull-up node. ## Claims ### Claim 1 A shift register, comprising a pull-up node, an output control sub-circuit, a first energy storage sub-circuit and an output sub-circuit, wherein the output control sub-circuit is coupled to the pull-up node, a first clock signal terminal and the first energy storage sub-circuit; and the output control sub-circuit is configured to transmit a first clock signal received at the first clock signal terminal to the first energy storage sub-circuit under control of a voltage of the pull-up node; the first energy storage sub-circuit is coupled to the pull-up node and the output control sub-circuit; and the first energy storage sub-circuit is configured to store the voltage of the pull-up node, and boost the voltage of the pull-up node under action of the first clock signal; and the output sub-circuit is coupled to the pull-up node and a signal output terminal; and the output sub-circuit is configured to transmit the boosted voltage of the pull-up node to the signal output terminal under the control of the voltage of the pull-up node. ### Claim 2 (depends on 1) The shift register according to claim 1, wherein the output control sub-circuit includes a first transistor, a control electrode of the first transistor is coupled to the pull-up node, a first electrode of the first transistor is coupled to the first clock signal terminal, and a second electrode of the first transistor is coupled to the first energy storage sub-circuit; the first energy storage sub-circuit includes a first capacitor, a first terminal of the first capacitor is coupled to the pull-up node, and a second terminal of the first capacitor is coupled to the second electrode of the first transistor; and the output sub-circuit includes a second transistor, a control electrode of the second transistor is coupled to the pull-up node, a first electrode of the second transistor is coupled to the pull-up node, and a second electrode of the second transistor is coupled to the signal output terminal. ### Claim 3 (depends on 1) The shift register according to claim 1, further comprising a pull-down sub-circuit, wherein the pull-down sub-circuit is coupled to a second clock signal terminal, the signal output terminal and a first voltage terminal, and is configured to transmit a first voltage signal received at the first voltage terminal to the signal output terminal in response to a second clock signal received at the second clock signal terminal. ### Claim 4 (depends on 3) The shift register according to claim 3, wherein the pull-down sub-circuit includes a third transistor, a control electrode of the third transistor is coupled to the second clock signal terminal, a first electrode of the third transistor is coupled to the first voltage terminal, and a second electrode of the third transistor is coupled to the signal output terminal. ### Claim 5 (depends on 1) The shift register according to claim 1, further comprising a second energy storage sub-circuit, wherein the second energy storage sub-circuit is coupled between the first energy storage sub-circuit and the signal output terminal, and is configured to keep the voltage of the pull-up node stable in a process of transmitting the boosted voltage of the pull-up node to the signal output terminal. ### Claim 6 (depends on 5) The shift register according to claim 5, wherein the second energy storage sub-circuit includes a second capacitor, and a first terminal of the second capacitor is coupled to the signal output terminal; and in a case where the first energy storage sub-circuit includes a first capacitor, a second terminal of the second capacitor is coupled to the first energy storage sub-circuit. ### Claim 7 (depends on 1) The shift register according to claim 1, further comprising an input sub-circuit and a reset sub-circuit, wherein the input sub-circuit is coupled to a signal input terminal, a second voltage terminal and the pull-up node, and is configured to transmit a second voltage signal received at the second voltage terminal to the pull-up node in response to an input signal received at the signal input terminal; and the reset sub-circuit is coupled to a reset signal terminal, a first voltage terminal and the pull-up node, and is configured to transmit a first voltage signal received at the first voltage terminal to the pull-up node in response to a reset signal received at the reset signal terminal. ### Claim 8 (depends on 7) The shift register according to claim 7, wherein the input sub-circuit includes a fourth transistor, a control electrode of the fourth transistor is coupled to the signal input terminal, a first electrode of the fourth transistor is coupled to the second voltage terminal, and a second electrode of the fourth transistor is coupled to the pull-up node; and the reset sub-circuit includes a fifth transistor, a control electrode of the fifth transistor is coupled to the reset signal terminal, a first electrode of the fifth transistor is coupled to the first voltage terminal, and a second electrode of the fifth transistor is coupled to the pull-up node. ### Claim 9 (depends on 1) The shift register according to claim 1, further comprising a pull-down node, a node control sub-circuit, a first noise reduction sub-circuit and a second noise reduction sub-circuit, wherein the node control sub-circuit is coupled to a second voltage terminal, the pull-up node, a first voltage terminal and the pull-down node; the node control sub-circuit is configured to transmit a first voltage signal received at the first voltage terminal to the pull-down node in response to the voltage of the pull-up node and a second voltage signal received at the second voltage terminal; and to transmit the second voltage signal received at the second voltage terminal to the pull-down node in response to the voltage of the pull-up node and the second voltage signal received at the second voltage terminal; the first noise reduction sub-circuit is coupled to the pull-up node, the pull-down node and the first voltage terminal, and is configured to transmit the first voltage signal received at the first voltage terminal to the pull-up node under control of a voltage of the pull-down node; and the second noise reduction sub-circuit is coupled to the pull-down node, the first voltage terminal and the signal output terminal, and is configured to transmit the first voltage signal received at the first voltage terminal to the signal output terminal under the control of the voltage of the pull-down node. ### Claim 10 (depends on 9) The shift register according to claim 9, wherein the node control sub-circuit includes a sixth transistor and a seventh transistor; a control electrode of the sixth transistor is coupled to the second voltage terminal, a first electrode of the sixth transistor is coupled to the second voltage terminal, and a second electrode of the sixth transistor is coupled to the pull-down node; a control electrode of the seventh transistor is coupled to the pull-up node, a first electrode of the seventh transistor is coupled to the first voltage terminal, and a second electrode of the seventh transistor is coupled to the pull-down node; the first noise reduction sub-circuit includes an eighth transistor, a control electrode of the eighth transistor is coupled to the pull-down node, a first electrode of the eighth transistor is coupled to the first voltage terminal, and a second electrode of the eighth transistor is coupled to the pull-up node; and the second noise reduction sub-circuit includes a ninth transistor, a control electrode of the ninth transistor is coupled to the pull-down node, a first electrode of the ninth transistor is coupled to the first voltage terminal, and a second electrode of the ninth transistor is coupled to the signal output terminal. ### Claim 11 (depends on 10) The shift register according to claim 10, wherein a size of the seventh transistor is greater than a size of the sixth transistor. ### Claim 12 (depends on 1) The shift register according to claim 1, further comprising a pull-down sub-circuit, an input sub-circuit, a reset sub-circuit, a pull-down node, a node control sub-circuit, a first noise reduction sub-circuit and a second noise reduction sub-circuit; wherein the output control sub-circuit includes a first transistor, the first energy storage sub-circuit includes a first capacitor, the output sub-circuit includes a second transistor, the pull-down sub-circuit includes a third sub-circuit, the input sub-circuit includes a fourth transistor, the reset sub-circuit includes a fifth transistor, the node control sub-circuit includes a sixth transistor and a seventh transistor, the first noise reduction sub-circuit includes an eighth transistor, and the second noise reduction sub-circuit includes a ninth transistor; a control electrode of the first transistor is coupled to the pull-up node, a first electrode of the first transistor is coupled to the first clock signal terminal, and a second terminal of the first transistor is coupled to a second terminal of the first capacitor; a first terminal of the first capacitor is coupled to the pull-up node, and is further coupled to the control electrode of the first transistor; a control electrode of the second transistor is coupled to the pull-up node, a first electrode of the second transistor is coupled to the pull-up node, and a second electrode of the second transistor is coupled to the signal output terminal; a control electrode of the third transistor is coupled to a second clock signal terminal, a first electrode of the third transistor is coupled to a first voltage terminal, and a second electrode of the third transistor is coupled to the signal output terminal; a control electrode of the fourth transistor is coupled to a signal input terminal, a first electrode of the fourth transistor is coupled to a second voltage terminal, and a second electrode of the fourth transistor is coupled to the pull-up node; a control electrode of the fifth transistor is coupled to a reset signal terminal, a first electrode of the fifth transistor is coupled to the first voltage terminal, and a second electrode of the fifth transistor is coupled to the pull-up node; a control electrode of the sixth transistor is coupled to the second voltage terminal, a first electrode of the sixth transistor is coupled to the second voltage terminal, and a second electrode of the sixth transistor is coupled to the pull-down node; a control electrode of the seventh transistor is coupled to the pull-up node, a first electrode of the seventh transistor is coupled to the first voltage terminal, and a second electrode of the seventh transistor is coupled to the pull-down node; a control electrode of the eighth transistor is coupled to the pull-down node, a first electrode of the eighth transistor is coupled to the first voltage terminal, and a second electrode of the eighth transistor is coupled to the pull-up node; and a control electrode of the ninth transistor is coupled to the pull-down node, a first electrode of the ninth transistor is coupled to the first voltage terminal, and a second electrode of the ninth transistor is coupled to the signal output terminal. ### Claim 13 (depends on 1) A gate driver circuit, comprising at least two cascaded shift registers according to claim 1, wherein a signal input terminal of a first stage shift register is coupled to a start signal terminal; a signal input terminal of any stage shift register other than the first stage shift register is coupled to a signal output terminal of a previous stage shift register of the any stage shift register; a reset signal terminal of any stage shift register other than a last stage shift register is coupled to a signal output terminal of a next stage shift register of this any stage shift register; and a reset signal terminal of the last stage shift register is coupled to a separately provided signal terminal for outputting a reset signal, or is coupled to the start signal terminal. ### Claim 14 (depends on 13) A display device, comprising the gate driver circuit according to claim 13. ### Claim 15 (depends on 1) A driving method for a shift register, applied to the shift register according to claim 1, the driving method comprising a frame cycle including a charging period and an outputting period, wherein the charging period includes: the output control sub-circuit being turned on under the control of the voltage of the pull-up node, to transmit the first clock signal received at the first clock signal terminal to the first energy storage sub-circuit; and storing, by the first energy storage sub-circuit, the voltage of the pull-up node; and the outputting period includes: the output control sub-circuit being turned on under the control of the voltage of the pull-up node, to transmit the first clock signal to the first energy storage sub-circuit; boosting, by the first energy storage sub-circuit, the voltage of the pull-up node in response to the first clock signal; and transmitting, by the output sub-circuit, the boosted voltage of the pull-up node to the signal output terminal under the control of the voltage of the pull-up node. ### Claim 16 (depends on 15) The driving method according to claim 15, wherein in a case where the shift register further includes a pull-down sub-circuit, the charging period further includes: the pull-down sub-circuit being turned on under the control of a second clock signal transmitted by a second clock signal terminal, to transmit a first voltage signal received at a first voltage terminal to the signal output terminal. ### Claim 17 (depends on 15) The driving method according to claim 15, wherein in a case where the shift register further includes a second energy storage sub-circuit, the outputting period further includes: keeping, by the second energy storage sub-circuit, the voltage of the pull-up node stable in a process of transmitting the boosted voltage of the pull-up node to the signal output terminal. ### Claim 18 (depends on 16) The driving method according to claim 16, wherein in a case where the shift register further comprises a pull-down node, an input sub-circuit, a reset sub-circuit, a node control sub-circuit, a first noise reduction sub-circuit and a second noise reduction sub-circuit, the charging period further includes: the input sub-circuit being turned on under the control of an input signal transmitted by a signal input terminal, to transmit a second voltage signal received at a second voltage terminal to the pull-up node; and transmitting, by the node control sub-circuit, the first voltage signal received at the first voltage terminal to the pull-down node in response to the voltage of the pull-up node and the second voltage signal received at the second voltage terminal; the driving method further comprises a resetting period after the outputting period, and the resetting period includes: the reset sub-circuit being turned on under control of a reset signal transmitted by a reset signal terminal, to output the first voltage signal received at the first voltage terminal to the pull-up node; transmitting, by the node control sub-circuit, the second voltage signal received at the second voltage terminal to the pull-down node in response to the voltage of the pull-up node and the second voltage signal received at the second voltage terminal; the first noise reduction sub-circuit being turned on under the control of the voltage of the pull-down node, to transmit the first voltage signal received at the first voltage terminal to the pull-up node; the second noise reduction sub-circuit being turned on under the control of the voltage of the pull-down node, to transmit the first voltage signal received at the first voltage terminal to the signal output terminal; and the pull-down sub-circuit being turned on under the control of the second clock signal transmitted by the second clock signal terminal, to transmit the first voltage signal received at the first voltage terminal to the signal output terminal; and the driving method further comprises a noise reduction period after the resetting period and before a next frame cycle, and the noise reduction period includes: the second noise reduction sub-circuit being kept on under the control of the voltage of the pull-down node, to transmit the first voltage signal received at the first voltage terminal to the signal output terminal.