# US RE48,737 E1 · Scan driver and organic light-emitting display using same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US RE48,737 E1 - Document ID: USRE48737E1 - Status: Granted - Kind: E1 - Application number: 16/416,284 - Filed: 2019-05-20 - Granted: 2021-09-14 - Earliest claimed: 2014-12-24 - Assignees: Kunshan New Flat Panel Display Technology Center Co., Ltd.; KunShan Go-Visionox Opto-Electronics Co., Ltd - Applicants: Kunshan New Flat Panel Display Technology Center Co., Ltd.; KunShan Go-Visionox Opto-Electronics Co., Ltd. - Inventors: Siming Hu; Hui Zhu; Xiuqi Huang; Xiaoyu Gao - Web page: https://patentgrep.com/patent/USRE48737E1 ## CPC - G09G 3/3266: Details of drivers for scan electrodes - G09G 3/3291: in which the data driver supplies a variable data voltage for setting the current through, or the voltage across, the light-emitting elements - G11C 19/28: using semiconductor elements (G11C19/14, G11C19/36 take precedence) - G09G 2310/0283: Arrangement of drivers for different directions of scanning - G09G 2310/0286: Details of a shift registers arranged for use in a driving circuit - G09G 2310/08: Details of timing specific for flat panels, other than clock recovery - G09G 2320/0219: Reducing feedthrough effects in active matrix panels, i.e. voltage changes on the scan electrode influencing the pixel voltage due to capacitive coupling - G09G 2330/021: Power management, e.g. power saving - 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 The present invention provides a scanning driver and an organic light-emitting display using the same. The scanning driver comprises a plurality of cascaded structures receiving signals from a first timing clock line (CK1) and a second timing clock line (CK2) with opposite phases, the cascaded structures successively generating output signals (i.e., scanning signals), wherein each of the cascaded structures comprises: a first transistor, connected to a starting signal line or to a scanning output line of a previous cascaded structure; a second transistor, connected to the second timing clock line and to the scanning output line; a third transistor connected to a high-level power supply VGH; a fourth transistor, connected to a low-level power supply VGL and to an output terminal of the third transistor; a fifth transistor, connected to a high-level power supply VGH and to a scanning output line; and a first capacitor, connected between an output terminal of the first transistor and the scanning output line. Arranging a first capacitor C1 between the output terminal of M1 and the scanning output line prevents slight-ON of M2, thus reducing the reverse current at the scanning driver and reducing the power consumption. ## Claims ### Claim 1 A scanning driver, comprising: a plurality of cascaded structures receiving signals from a first timing clock line and a second timing clock line with opposite phases, the cascaded structures successively generating scanning signals, wherein each of the cascaded structures comprises: a scanning output line, used to output the scanning signals; a first transistor, connected to a starting signal line or to a the scanning output line of the previous cascaded structure, the first transistor comprising a gate connected to the first timing clock line; a second transistor, connected to the second timing clock line and the scanning output line, the second transistor comprising a gate connected to an output terminal of the first transistor; a third transistor, connected to a high-level power supply VGH, the third transistor comprising a gate connected to an output terminal of the second transistor; a fourth transistor, connected to a low-level power supply VGL and to an output terminal of the third transistor, the fourth transistor comprising a gate connected to the first timing clock line; a fifth transistor, connected to a high-level power supply VGH and to a the scanning output line, the fifth transistor comprising a gate connected to an output terminal of the fourth transistor and to an the output terminal of the third transistor; and a first capacitor, connected between an the output terminal of the first transistor and the scanning output line. ### Claim 2 (depends on 1) The scanning driver according to the claim 1, wherein each of the cascaded structures further comprises: a second capacitor, connected between the output terminal of an the first transistor and a fixed potential. ### Claim 3 (depends on 2) The scanning driver according to the claim 2, characterized in that the fixed potential is a the low-level power supply VGL. ### Claim 4 (depends on 3) The scanning driver according to claim 3, wherein the transistors first through fifth transistor are bidirectional PMOS transistors or bidirectional P-type thin film field effect transistors. ### Claim 5 (depends on 4) An organic light-emitting display, comprising a pixel array, connected to a data line and a the scanning output line; a data driver, configured to provide data signals to the data line; a the scanning driver of claim 4, configured to provide scanning signals to the scanning output lineas defined in claim 4; and a timing controller, configured to provide timing signals and a the high-level power supply VGH and a the low-level power supply VGL to the scanning driver. ### Claim 6 (depends on 3) An organic light-emitting display, comprising a pixel array, connected to a data line and a the scanning output line; a data driver, configured to provide data signals to the data line; a the scanning driver drive of claim 3, configured to provide scanning signals to the scanning output lineas defined in claim 3; and a timing controller, configured to provide timing signals and a the high-level power supply VGH and a the low-level power supply VGL to the scanning driver. ### Claim 7 (depends on 2) The scanning driver according to the claim 2, wherein the fixed potential is a the high-level power supply VGH. ### Claim 8 (depends on 7) The scanning driver according to claim 7, wherein the transistors first through fifth transistor are bidirectional PMOS transistors or bidirectional P-type thin film field effect transistors. ### Claim 9 (depends on 8) An organic light-emitting display, comprising a pixel array, connected to a data line and a the scanning output line; a data driver, configured to provide data signals to the data line; a the scanning driver drive of claim 8, configured to provide scanning signals to the scanning output lineas defined in claim 8; and a timing controller, configured to provide timing signals and a the high-level power supply VGH and a the low-level power supply VGL to the scanning driver. ### Claim 10 (depends on 7) An organic light-emitting display, comprising a pixel array, connected to a data line and a the scanning output line; a data driver, configured to provide data signals to the data line; a the scanning driver drive of claim 7, configured to provide scanning signals to the scanning output lineas defined in claim 7; and a timing controller, configured to provide timing signals and a the high-level power supply VGH and a the low-level power supply VGL to the scanning driver. ### Claim 11 (depends on 2) The scanning driver according to claim 2, wherein the transistors first through fifth transistor are bidirectional PMOS transistors or bidirectional P-type thin film field effect transistors. ### Claim 12 (depends on 11) An organic light-emitting display, comprising a pixel array, connected to a data line and a the scanning output line; a data driver, configured to provide data signals to the data line; a the scanning driver of claim 11, configured to provide scanning signals to the scanning output lineas defined in claim 11; and a timing controller, configured to provide timing signals and a the high-level power supply VGH and a the low-level power supply VGL to the scanning driver. ### Claim 13 (depends on 2) An organic light-emitting display, comprising a pixel array, connected to a data line and a the scanning output line; a data driver, configured to provide data signals to the data line; a the scanning driver of claim 2, configured to provide scanning signals to the scanning output lineas defined in claim 2; and a timing controller, configured to provide timing signals and a the high-level power supply VGH and a the low-level power supply VGL to the scanning driver. ### Claim 14 (depends on 1) The scanning driver according to the claim 1, wherein a first clock terminal of an odd one of the cascade structures is connected to the first timing clock line, and a second clock terminal thereof is connected to the second timing clock line; and a first clock terminal of an even one of the cascade structures is connected to the second timing clock line, and a second clock terminal thereof is connected to the first timing clock line. ### Claim 15 (depends on 14) The scanning driver according to claim 14, wherein the transistors first through fifth transistor are bidirectional PMOS transistors or bidirectional P-type thin film field effect transistors. ### Claim 16 (depends on 15) An organic light-emitting display, comprising a pixel array, connected to a data line and a the scanning output line; a data driver, configured to provide data signals to the data line; a the scanning driver of claim 15, configured to provide scanning signals to the scanning output line as defined in claim 15; and a timing controller, configured to provide timing signals and a the high-level power supply VGH and a the low-level power supply VGL to the scanning driver. ### Claim 17 (depends on 14) An organic light-emitting display, comprising a pixel array, connected to a data line and a the scanning output line; a data driver, configured to provide data signals to the data line; a the scanning driver of claim 14, configured to provide scanning signals to the scanning output lineas defined in claim 14; and a timing controller, configured to provide timing signals and a the high-level power supply VGH and a the low-level power supply VGL to the scanning driver. ### Claim 18 (depends on 1) The scanning driver according to claim 1, wherein the transistors first through fifth transistor are bidirectional PMOS transistors or bidirectional P-type thin film field effect transistors. ### Claim 19 (depends on 18) The scanning driver according to claim 18, wherein the transistors are bidirectional PMOS transistors or bidirectional P-type thin film field effect transistors. ### Claim 20 (depends on 1) An organic light-emitting display, comprising a pixel array, connected to a data line and a the scanning output line; a data driver, configured to provide data signals to the data line; a the scanning driver of claim 1, configured to provide scanning signals to the scanning output lineas defined in claim 1; and a timing controller, configured to provide timing signals and a the high-level power supply VGH and a the low-level power supply VGL to the scanning driver.