# US 12,118,915 B2 · Shift register, gate driving circuit, display apparatus and driving method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,118,915 B2 - Document ID: US12118915B2 - Status: Granted - Kind: B2 - Application number: 18/306,723 - Filed: 2023-04-25 - Published: 2023-09-28 - Granted: 2024-10-15 - Earliest claimed: 2018-02-14 - Assignees: Hefei Xinsheng Optoelectronics Technology Co., Ltd.; Boe Technology Group Co., Ltd. - Applicants: Hefei Xinsheng Optoelectronics Technology Co., Ltd.; BOE Technology Group Co., Ltd. - Inventors: Xuehuan Feng; Yongqian Li - Web page: https://patentgrep.com/patent/US12118915B2 ## CPC - G09G 3/2092: {Details of a display terminals using a flat panel, the details relating to the control arrangement of the display terminal and to the interfaces thereto (suitable for both CRT and flat panel G09G5/003; specific for a CRT G09G1/165)} - G09G 3/3266: Details of drivers for scan electrodes - G09G 3/20: 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} - G09G 3/3674: {Details of drivers for scan electrodes} - G11C 19/28: using semiconductor elements (G11C19/14, G11C19/36 take precedence) - G09G 2300/0426: Layout of electrodes and connections - G09G 2310/0286: Details of a shift registers arranged for use in a driving circuit - G09G 2310/06: Details of flat display driving waveforms - G09G 2310/061: for resetting or blanking - G09G 2310/08: Details of timing specific for flat panels, other than clock recovery - 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 Disclosed is a shift register including a first input sub-circuit, configured to receive a first input signal from a first input terminal and output a blanking output control signal to a first node in a blanking period of time of a frame; a second input sub-circuit, configured to receive a second input signal from a second input terminal and output a display output control signal to the first node in a display period of time of the frame; an output sub-circuit, configured to output a composite output signal via an output terminal under control of the first node, the composite output signal including a display output signal outputted in a display period of time and a blanking output signal outputted in a blanking period of time which are independent of each other. ## Claims ### Claim 1 A shift register, comprising: a first input sub-circuit, configured to receive a first input signal from a first input terminal and output a blanking output control signal; a second input sub-circuit, configured to receive a second input signal from a second input terminal and output a display output control signal; an output sub-circuit, configured to output a composite output signal via an output terminal under control of a first node; a pull-down control sub-circuit, configured to control a potential of a pull-down node according to the first node; and a pull-down sub-circuit, configured to pull down the first node and the output terminal to a non-operating potential under control of the pull-down node, wherein the first input sub-circuit comprises: an isolating sub-circuit, configured to input the blanking output control signal to the first node according to a blanking pull-up control signal in a blanking period of time of a frame, the isolating sub-circuit comprises a first isolating transistor and a second isolating transistor, wherein a control electrode of the first isolating transistor is connected to a blanking pull-up control node, a first electrode of the second isolating transistor is directly connected to a second electrode of the first isolating transistor, a second electrode of the second isolating transistor is connected to the first node, and a control electrode of the second isolating transistor is connected to an isolation control signal line, the shift register further comprises: a first electric leakage prevention sub-circuit and a second electric leakage prevention sub-circuit, the second electric leakage prevention sub-circuit comprises a first transistor configured for preventing electric leakage, wherein a control electrode of the first transistor is connected to the control electrode of the second isolating transistor, a first electrode of the first transistor is directly connected to the second electrode of the second isolating transistor, and a second electrode of the first transistor is directly connected to the first node. ### Claim 2 (depends on 1) The shift register according to claim 1, wherein the second electric leakage prevention sub-circuit is configured to input an operating potential to the second electrode of the second isolating transistor under control of the first node. ### Claim 3 (depends on 1) The shift register according to claim 1, wherein the second electric leakage prevention sub-circuit is configured to input the blanking output control signal to the first node under control of a signal of the isolation control signal line. ### Claim 4 (depends on 1) The shift register according to claim 1, wherein the first input sub-circuit comprises: a charging sub-circuit, configured to input the first input signal to the blanking pull-up control node; and a storing sub-circuit, having a first terminal connected to the blanking pull-up control node, configured to store the blanking pull-up control signal. ### Claim 5 (depends on 1) The shift register according to claim 1, wherein the first input sub-circuit is configured to receive the first input signal from the first input terminal, and input the blanking output control signal to the first node in the blanking period of time of the frame according to the blanking pull-up control signal, and the second input sub-circuit is configured to receive the second input signal from the second input terminal, and input the display output control signal to the first node in a display period of time of the frame. ### Claim 6 (depends on 1) The shift register according to claim 1, further comprising: a display reset sub-circuit, configured to reset the first node under control of a display reset control signal, wherein the display reset sub-circuit is directly connected to the first electrode of the first transistor of the second electric leakage prevention sub-circuit, and is connected to the second electrode of the first transistor of the second electric leakage prevention sub-circuit. ### Claim 7 (depends on 4) The shift register according to claim 4, wherein the charging sub-circuit comprises a charging transistor, having a first electrode and/or a control electrode connected to the first input terminal, and a second electrode connected to the blanking pull-up control node; and the storing sub-circuit comprises a first capacitor, having a first terminal connected to the blanking pull-up control node. ### Claim 8 (depends on 7) The shift register according to claim 7, wherein the first electric leakage prevention sub-circuit comprises a second electric leakage prevention transistor, wherein a first electrode of the second electric leakage prevention transistor is connected to the second electrode of the charging transistor, a second electrode of the second electric leakage prevention transistor is connected to an electric leakage prevention signal input terminal, and a control electrode of the second electric leakage prevention transistor is connected to the blanking pull-up control node. ### Claim 9 (depends on 6) The shift register according to claim 6, wherein the second input sub-circuit comprises a first display input transistor, having a first electrode connected to the first node, a second electrode and/or a control electrode connected to the second input terminal; the output sub-circuit comprises an output transistor and an output capacitor, wherein a first electrode of the output transistor is connected to an output clock signal line, a second electrode of the output transistor is connected to the output terminal, and a control electrode of the output transistor is connected to the first node, a first terminal of the output capacitor is connected to the first node, and a second terminal of the output capacitor is connected to the output terminal; and the first display input transistor is directly connected to the first electrode of the first transistor of the second electric leakage prevention sub-circuit, and is connected to the second electrode of the first transistor of the second electric leakage prevention sub-circuit. ### Claim 10 (depends on 9) The shift register according to claim 9, wherein the second electric leakage prevention sub-circuit comprises a second transistor configured for preventing electric leakage, wherein a control electrode of the second transistor is connected to the control electrode of the first display input transistor, a first electrode of the second transistor is connected to the first electrode of the first display input transistor, and a second electrode of the second transistor is connected to the first node; and the first electrode of the second transistor is directly connected to the first electrode of the first transistor of the second electric leakage prevention sub-circuit, and the second electrode of the second transistor is directly connected to the second electrode of the first transistor of the second electric leakage prevention sub-circuit. ### Claim 11 (depends on 10) The shift register according to claim 10, wherein the display reset sub-circuit comprises a display reset transistor, having a first electrode connected to the first node, a control electrode connected to a display reset control terminal, and a second electrode connected to a display reset signal line; and the display reset transistor is directly connected to the first electrode of the second transistor configured for preventing electric leakage, and is connected to the second electrode of the second transistor configured for preventing electric leakage. ### Claim 12 (depends on 1) The shift register according to claim 1, wherein the second electric leakage prevention sub-circuit comprises a third transistor configured for preventing electric leakage, wherein a control electrode of the third transistor is connected to the pull-down node, a first electrode of the third transistor is connected to the first node, and a second electrode of the third transistor is connected to a third signal line; and the third transistor is directly connected to the first electrode and the second electrode of the first transistor of the second electric leakage prevention sub-circuit. ### Claim 13 (depends on 1) The shift register according to claim 1, wherein the second electric leakage prevention sub-circuit comprises a fourth transistor configured for preventing electric leakage, wherein a control electrode of the fourth transistor is connected to a display reset control terminal, a first electrode of the fourth transistor is connected to the first node, and a second electrode of the fourth transistor is connected to a second signal line; and the first electrode of the fourth transistor is directly connected to the second electrode of the first transistor of the second electric leakage prevention sub-circuit, and the second electrode of the fourth transistor is directly connected to the first electrode of the first transistor of the second electric leakage prevention sub-circuit. ### Claim 14 (depends on 1) The shift register according to claim 1, wherein the second electric leakage prevention sub-circuit comprises a fifth transistor configured for preventing electric leakage, wherein a control electrode of the fifth transistor configured for preventing electric leakage is connected to the first node, a first electrode of the fifth transistor configured for preventing electric leakage is connected to the first electrode of the first transistor configured for preventing electric leakage, and a second electrode of the fifth transistor configured for preventing electric leakage is connected to an electric leakage prevention signal input terminal. ### Claim 15 (depends on 1) The shift register according to claim 1, wherein the pull-down control sub-circuit comprises a first pull-down control transistor and a second pull-down control transistor, wherein a first electrode of the first pull-down control transistor is connected with a control electrode of the first pull-down control transistor and connected to a pull-down control signal line, and a second electrode of the first pull-down control transistor is connected to the pull-down node, a first electrode of the second pull-down control transistor is connected to the pull-down node, a control electrode of the second pull-down control transistor is connected to the first node, and a second electrode of the second pull-down control transistor is connected to a pull-down signal line, the pull-down sub-circuit comprises a first pull-down transistor and a second pull-down transistor, wherein a first electrode of the first pull-down transistor is connected to the first node, a control electrode of the first pull-down transistor is connected to the pull-down node, and a second electrode of the first pull-down transistor is connected to the pull-down signal line, a first electrode of the second pull-down transistor is connected to the output terminal, a control electrode of the second pull-down transistor is connected to the pull-down node, and a second electrode of the second pull-down transistor is connected to the pull-down signal line. ### Claim 16 A shift register, comprising: a charging transistor, a first isolating transistor, a second isolating transistor, a first capacitor, a first display input transistor, a first output transistor, a second output transistor, and an output capacitor, a display reset transistor, a first pull-down control transistor, a second pull-down control transistor, a first pull-down transistor, a second pull-down transistor, a third pull-down transistor, a first electric leakage prevention transistor, a second electric leakage prevention transistor, a first transistor configured for preventing electric leakage, a second transistor configured for preventing electric leakage, a third transistor configured for preventing electric leakage, a fourth transistor configured for preventing electric leakage, a fifth transistor configured for preventing electric leakage, a first electrode of the charging transistor is connected to a first input terminal, a control electrode of the charging transistor is connected to a second clock signal line, and a second electrode of the charging transistor is connected to a second electrode of the first electric leakage prevention transistor, a first electrode of the first electric leakage prevention transistor is connected to a blanking pull-up control node, and a control electrode of the first electric leakage prevention transistor is connected to the control electrode of the charging transistor, a first electrode of the second electric leakage prevention transistor is connected to the second electrode of the charging transistor, a second electrode of the second electric leakage prevention transistor is connected to an electric leakage prevention signal input terminal, and a control electrode of the second electric leakage prevention transistor is connected to the blanking pull-up control node, a control electrode of the first isolating transistor is connected to the blanking pull-up control node, and a first electrode of the first isolating transistor is connected to an isolation control signal line, a first electrode of the second isolating transistor is connected to a second electrode of the first isolating transistor, a second electrode of the second isolating transistor is connected to a first electrode of the first transistor configured for preventing electric leakage, and a control electrode of the second isolating transistor is connected to the isolation control signal line, a first terminal of the first capacitor is connected to the blanking pull-up control node, and a second terminal of the first capacitor is connected to a direct current voltage signal line, a control electrode of the first transistor configured for preventing electric leakage is connected to the control electrode of the second isolating transistor, and a second electrode of the first transistor configured for preventing electric leakage is connected to a first node, a first electrode of the first display input transistor is connected to a first electrode of the second transistor configured for preventing electric leakage, a second electrode of the first display input transistor is connected to a second input terminal, and a control electrode of the first display input transistor is connected to a first clock signal line or the second input terminal, the first electrode of the second transistor configured for preventing electric leakage is directly connected to the first electrode of the first transistor configured for preventing electric leakage, a control electrode of the second transistor configured for preventing electric leakage is connected to the control electrode of the first display input transistor, and a second electrode of the second transistor configured for preventing electric leakage is connected to the first node, a first electrode of the display reset transistor is connected to a second electrode of the fourth transistor configured for preventing electric leakage, a control electrode of the display reset transistor is connected to a display reset control terminal, and a second electrode of the display reset transistor is connected to a second signal line, a control electrode of the fourth transistor configured for preventing electric leakage is connected to the control electrode of the display reset transistor, and a first electrode of the fourth transistor configured for preventing electric leakage is connected to the first node, a first electrode of the first pull-down transistor is connected to a second electrode of the third transistor configured for preventing electric leakage, a control electrode of the first pull-down transistor is connected to a pull-down node, and a second electrode of the first pull-down transistor is connected to a third signal line, a control electrode of the third transistor configured for preventing electric leakage is connected to the control electrode of the first pull-down transistor, and a first electrode of the third transistor configured for preventing electric leakage is connected to the first node, a first electrode of the fifth transistor configured for preventing electric leakage is connected to the first electrode of the first transistor configured for preventing electric leakage, the first electrode of the second transistor configured for preventing electric leakage, the second electrode of the third transistor configured for preventing electric leakage, and the second electrode of the fourth transistor configured for preventing electric leakage, a second electrode of the fifth transistor configured for preventing electric leakage is connected to the electric leakage prevention signal input terminal, and a control electrode of the fifth transistor configured for preventing electric leakage is connected to the first node, a first electrode of the first pull-down control transistor is connected with a control electrode of the first pull-down control transistor and connected to a first pull-down control signal line, and a second electrode of the first pull-down control transistor is connected to the pull-down node, a first electrode of the second pull-down control transistor is connected to the pull-down node, a control electrode of the second pull-down control transistor is connected to the first node, and a second electrode of the second pull-down control transistor is connected to a fourth signal line, a first electrode of the second pull-down transistor is connected to a first output terminal, a control electrode of the second pull-down transistor is connected to the pull-down node, and a second electrode of the second pull-down transistor is connected to a fifth signal line, a first electrode of the third pull-down transistor is connected to a second output terminal, a control electrode of the third pull-down transistor is connected to the pull-down node, and a second electrode of the third pull-down transistor is connected to a sixth signal line, a first electrode of the first output transistor is connected to an output clock signal line, a second electrode of the first output transistor is connected to the first output terminal, and a control electrode of the first output transistor is connected to the first node, a first electrode of the second output transistor is connected to the output clock signal line, a second electrode of the second output transistor is connected to the second output terminal, and a control electrode of the second output transistor is connected to the first node, and a first terminal of the output capacitor is connected to the first node, and a second terminal of the output capacitor is connected to the first output terminal. ### Claim 17 (depends on 1) A gate driving circuit, comprising N stages of shift registers, where N is an integer greater than 2, each of the shift registers being the shift register according to claim 1, wherein a second input terminal of a first stage shift register is connected to a display signal line, and a first input terminal of the first stage shift register is connected to a blanking signal line, and a display reset control terminal of an N-th stage shift register is connected to a display reset control signal line. ### Claim 18 (depends on 17) A display apparatus, comprising the gate driving circuit according to claim 17. ### Claim 19 (depends on 1) A driving method applicable to the shift register according to claim 1, comprising: during a display period of time of the frame: in a first control phase, inputting, by the second input sub-circuit, the display output control signal to the first node; and in a first output phase, outputting, by the output sub-circuit, a first output signal under control of the first node, and during the blanking period of time of the frame: in a second control phase, inputting, by the first input sub-circuit, the blanking output control signal to the first node; and in a second output phase, outputting, by the output sub-circuit, a second output signal under control of the first node. ### Claim 20 (depends on 19) The driving method according to claim 19, further comprising: in a display reset phase, resetting the first node under control of a display reset control signal.