# US 10,373,557 B2 · Organic light-emitting pixel driving circuit, driving method and organic light-emitting display panel > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,373,557 B2 - Document ID: US10373557B2 - Status: Granted - Kind: B2 - Application number: 15/636,455 - Filed: 2017-06-28 - Published: 2017-10-19 - Granted: 2019-08-06 - Earliest claimed: 2017-01-25 - Assignees: Shanghai Tianma Am-Oled Co., Ltd. - Applicants: Shanghai Tianma Am-Oled Co., Ltd. - Inventors: Renyuan Zhu; Yue Li; Tong Wu; Dongxu Xiang; Zeyuan Chen - Web page: https://patentgrep.com/patent/US10373557B2 ## CPC - G09G 3/3233: with pixel circuitry controlling the current through the light-emitting element - G09G 3/3208: organic, e.g. using organic light-emitting diodes [OLED] - G09G 3/3258: with pixel circuitry controlling the voltage across the light-emitting element - G09G 3/3266: Details of drivers for scan electrodes - G09G 3/3275: Details of drivers for data electrodes - H10K 59/123: Connection of the pixel electrodes to the thin film transistors [TFT] - 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 - G09G 2300/0426: Layout of electrodes and connections - G09G 2300/0819: used for counteracting undesired variations, e.g. feedback or autozeroing - G09G 2300/0842: forming a memory circuit, e.g. a dynamic memory with one capacitor - G09G 2300/0861: with additional control of the display period without amending the charge stored in a pixel memory, e.g. by means of additional select electrodes - G09G 2310/0262: The addressing of the pixel, in a display other than an active matrix LCD, involving the control of two or more scan electrodes or two or more data electrodes, e.g. pixel voltage dependent on signals of two data electrodes - G09G 2310/0286: Details of a shift registers arranged for use in a driving circuit - G09G 2320/0233: Improving the luminance or brightness uniformity across the screen - G09G 2320/043: Preventing or counteracting the effects of ageing - G09G 2320/0626: for control of overall brightness - G09G 2330/02: Details of power systems and of start or stop of display operation - H10D 30/6733: {Multi-gate TFTs} - H10D 30/6757: {characterised by the structure of the channel, e.g. transverse or longitudinal shape or doping profile (TFTs having channel structures for preventing kink or snapback effects H10D30/6708; TFTs having lightly-doped source or drain extensions H10D30/6715)} - H10D 86/471: {having different architectures, e.g. having both top-gate and bottom-gate TFTs} - H10D 86/60: wherein the TFTs are in active matrices - H10K 59/1213: {the pixel elements being TFTs} - 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) - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES - H10D: INORGANIC ELECTRIC SEMICONDUCTOR DEVICES ## Abstract The present application discloses an organic light-emitting pixel driving circuit, a driving method and an organic light-emitting display panel. The organic light-emitting pixel driving circuit comprises: a first transistor provides an initialization signal to an anode of the organic light-emitting diode and a gate of the driving transistor; a second transistor compensates a threshold voltage of the driving transistor; a third transistor provides a data signal to the driving transistor; a fourth transistor transmits a first power supply voltage to the driving transistor; a fifth transistor controls electrical connection between the driving transistor and the organic light-emitting diode based on a signal of the second light-emission controlling signal terminal; a capacitor is used to store the data signal transmitted to the driving transistor; an organic light-emitting diode is used to emit light in response to the driving current generated by the driving transistor. ## Claims ### Claim 1 An organic light-emitting pixel driving circuit, comprising: a first scanning signal terminal, a second scanning signal terminal, a first light-emission controlling signal terminal, a second light-emission controlling signal terminal, a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a diving transistor, an organic light-emitting diode, a first power supply voltage terminal, and a data signal terminal and a capacitor; wherein the first transistor provides an initialization signal to an anode of the organic light-emitting diode and a gate of the driving transistor based on a signal from the first scanning signal terminal; wherein the second transistor compensates a threshold voltage of the driving transistor based on a signal from the second scanning signal terminal, a gate of the second transistor is connected with the second scanning signal terminal, a first electrode of the second transistor is connected with a second electrode of the driving transistor, and a second electrode of the second transistor is connected with the gate of the driving transistor; wherein the third transistor provides a data signal to the driving transistor based on a signal from the second scanning signal terminal, a gate of the third transistor is connected with the second scanning signal terminal, a first electrode of the third transistor is connected with the data signal terminal, and a second electrode of the third transistor is connected with the first electrode of the driving transistor; wherein the fourth transistor transmits a first power supply voltage to the driving transistor based on a signal from the first light-emission controlling signal terminal; wherein the fifth transistor is coupled in series between the driving transistor and the anode of the organic light-emitting diode, and controls electrical connection between the driving transistor and the organic light-emitting diode based on a signal from the second light-emission controlling signal terminal, a gate of the fifth transistor is connected with the second light-emission controlling signal terminal, a first electrode of the fifth transistor is connected with the second electrode of the driving transistor, and a second electrode of the fifth transistor is connected with the anode of the organic light emitting diode; wherein the capacitor is connected to the first power supply voltage terminal, and configured to store the data signal transmitted to the driving transistor; and wherein the organic light-emitting diode is configured to emit light in response to a driving current generated by the driving transistor. ### Claim 2 (depends on 1) The organic light-emitting pixel driving circuit according to claim 1, wherein the first transistor and second transistor are dual-gate transistors. ### Claim 3 (depends on 1) The organic light-emitting pixel driving circuit according to claim 1, further comprising an initialization signal terminal, wherein a gate of the first transistor is connected with the first scanning signal terminal, a first electrode of the first transistor is connected with the initialization signal terminal, and a second electrode of the first transistor is connected with the second electrode of the driving transistor, and a width-length ratio of electrically conductive channels of the first transistor and second transistor is smaller than a width-length ratio of electrically conductive channels of the third transistor, fourth transistor and fifth transistor. ### Claim 4 (depends on 1) The organic light-emitting pixel driving circuit according to claim 1, wherein the initialization signal is a signal received by the first scanning signal terminal. ### Claim 5 (depends on 4) The organic light-emitting pixel driving circuit according to claim 4, further comprising a second power supply voltage terminal; wherein a gate of the first transistor and a first electrode of the first transistor are both connected with the first scanning signal terminal, and a second electrode of the first transistor is connected with a second electrode of the driving transistor; wherein a gate of the second transistor is connected with the second scanning signal terminal, a first electrode of the second transistor is connected with a second electrode of the driving transistor, and a second electrode of the second transistor is connected with the gate of the driving transistor; wherein a gate of the third transistor is connected with the second scanning signal terminal, a first electrode of the third transistor is connected with the data signal terminal, and a second electrode of the third transistor is connected with the first electrode of the driving transistor; wherein a gate of the fourth transistor is connected with the first light-emission controlling signal terminal, a first electrode of the fourth transistor is connected with the first power supply voltage terminal, and a second electrode of the fourth transistor is connected with the first electrode of the driving transistor; wherein a gate of the fifth transistor is connected with the second light-emission controlling signal terminal, a first electrode of the fifth transistor is connected with the second electrode of the driving transistor, and a second electrode of the fifth transistor is connected with the anode of the organic light-emitting diode; wherein a terminal of the capacitor is connected to the first power supply voltage terminal, and another terminal of the capacitor is connected to the gate of the driving transistor; and wherein a cathode of the organic light-emitting diode is connected to the second power supply voltage terminal. ### Claim 6 (depends on 1) The organic light-emitting pixel driving circuit according to claim 1, further comprising an initialization signal terminal, wherein the initialization signal is a signal transmitted from the initialization signal terminal. ### Claim 7 (depends on 6) The organic light-emitting pixel driving circuit according to claim 6, further comprising a data signal terminal, a first power supply voltage terminal and a second power supply voltage terminal; wherein a gate of the first transistor is connected with the first scanning signal terminal, a first electrode of the first transistor is connected with the initialization signal terminal, and a second electrode of the first transistor is connected with a second electrode of the driving transistor; wherein a gate of the second transistor is connected with the second scanning signal terminal, a first electrode of the second transistor is connected with the second electrode of the driving transistor, and a second electrode of the second transistor is connected with the gate of the driving transistor; wherein a gate of the third transistor is connected with the second scanning signal terminal, a first electrode of the third transistor is connected with the data signal terminal, and a second electrode of the third transistor is connected with the first electrode of the driving transistor; wherein a gate of the fourth transistor is connected with the first light-emission controlling signal terminal, a first electrode of the fourth transistor is connected with the first power supply voltage terminal, and a second electrode of the fourth transistor is connected with the first electrode of the driving transistor; wherein a gate of the fifth transistor is connected to the second light-emission controlling signal terminal, a first electrode of the fifth transistor is connected to the second electrode of the driving transistor, and a second electrode of the fifth transistor is connected with the anode of the organic light-emitting diode; wherein a terminal of the capacitor is connected to the first power supply voltage terminal, and another terminal of the capacitor is connected to the gate of the driving transistor; and wherein a cathode of the organic light-emitting diode is connected to the second power supply voltage terminal. ### Claim 8 (depends on 1) An organic light-emitting display panel comprising multiple rows of pixel units, each row of the pixel units comprising a plurality of the organic light-emitting pixel driving circuits according to claim 1. ### Claim 9 (depends on 8) The organic light-emitting display panel according to claim 8, wherein each row of the pixel units are connected with a first scanning signal line and a second scanning signal line; wherein the first scanning signal terminal receives a signal transmitted from the first scanning signal line, and the second scanning signal terminal receives a signal transmitted from the second scanning signal line. ### Claim 10 (depends on 9) The organic light-emitting display panel according to claim 9, wherein the second scanning signal line connected with an ith row of pixel units is multiplexed as the first scanning signal line for an (i+1)th row of pixel units, i being a positive integer. ### Claim 11 (depends on 8) The organic light-emitting display panel according to claim 8, wherein each row of the pixel units are connected with a first light-emission controlling signal line and a second light-emission controlling signal line; wherein the first light-emission controlling signal terminal receives a signal transmitted from the first light-emission controlling signal line, and the second light-emission controlling signal terminal receives a signal transmitted from the second light-emission controlling signal line. ### Claim 12 (depends on 11) The organic light-emitting display panel according to claim 11, wherein the second light-emission controlling signal line connected with an ith row of pixel units is multiplexed as the second light-emission controlling signal line for an (i+1)th row of pixel units, i being a positive integer. ### Claim 13 A method of driving an organic light-emitting pixel driving circuit, wherein the organic light-emitting pixel driving circuit comprises: a first scanning signal terminal, a second scanning signal terminal, a first light-emission controlling signal terminal, a second light-emission controlling signal terminal, a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a diving transistor, an organic light-emitting diode, a first power supply voltage terminal, a data signal terminal and a capacitor; wherein the first transistor provides an initialization signal to an anode of the organic light-emitting diode and a gate of the driving transistor based on a signal from the first scanning signal terminal; wherein the second transistor compensates a threshold voltage of the driving transistor based on a signal from the second scanning signal terminal, a gate of the second transistor is connected with the second scanning signal terminal, a first electrode of the second transistor is connected with a second electrode of the driving transistor, and a second electrode of the second transistor is connected with the gate of the driving transistor; wherein the third transistor provides a data signal to the driving transistor based on a signal from the second scanning signal terminal, a gate of the third transistor is connected with the second scanning signal terminal, a first electrode of the third transistor is connected with the data signal terminal, and a second electrode of the third transistor is connected with the first electrode of the driving transistor; wherein the fourth transistor transmits a first power supply voltage to the driving transistor based on a signal from the first light-emission controlling signal terminal; wherein the fifth transistor is coupled in series between the driving transistor and the anode of the organic light-emitting diode, and controls electrical connection between the driving transistor and the organic light-emitting diode based on a signal from the second light-emission controlling signal terminal, a gate of the fifth transistor is connected with the second light-emission controlling signal terminal, a first electrode of the fifth transistor is connected with the second electrode of the driving transistor, and a second electrode of the fifth transistor is connected with the anode of the organic light emitting diode; wherein the capacitor is connected to the first power supply voltage terminal, and configured to store the data signal transmitted to the driving transistor; and wherein the organic light-emitting diode is configured to emit light in response to a driving current generated by the driving transistor; wherein the method comprises an initialization phase, a threshold detection and data write phase, and a light-emitting phase; wherein in the initialization phase, the first transistor transmits an initialization voltage to the anode of the organic light-emitting diode and the gate of the driving transistor based on a signal from the first scanning signal terminal, so as to complete initialization of the organic light-emitting diode and driving transistor; wherein in the threshold detection and data write phase, the data signal terminal receives the data signal, the third transistor transmits the data signal to the gate of the driving transistor based on a signal from the second scanning signal terminal, so as to complete data writing of the pixel driving circuit and threshold detection of the driving transistor; and wherein in the light-emitting phase, the first transistor is turned off based on a signal from the first scanning signal terminal, the second transistor and third transistor are turned off based on a signal from the second scanning signal terminal, the fourth transistor transmits the first power supply voltage signal to the driving transistor based on a signal from the first light-emission controlling signal terminal, the driving transistor generates a driving current, the fifth transistor is turned on based on a signal from the second light-emission controlling signal terminal, and the organic light-emitting diode emits light based on the driving current. ### Claim 14 (depends on 13) The method according to claim 13, wherein the initialization voltage is a voltage received by the first scanning signal terminal. ### Claim 15 (depends on 13) The method according to claim 13, wherein the organic light-emitting pixel driving circuit further comprises an initialization signal terminal, and the initialization voltage is a voltage signal transmitted from the initialization signal terminal. ### Claim 16 (depends on 13) The method according to claim 13, wherein the initialization phase comprises a first initialization phase and a second initialization phase; wherein in the first initialization phase, the first transistor transmits an initialization voltage to the anode of the organic light-emitting diode based on a signal from the first scanning signal terminal; and wherein in the second initialization phase, the first transistor, based on a signal from the first scanning signal terminal, and the second transistor, based on a signal from the second scanning signal terminal, transmit the initialization voltage to the gate of the driving transistor.