# US 12,183,284 B2 · Pixel driving circuit, array substrate 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 12,183,284 B2 - Document ID: US12183284B2 - Status: Granted - Kind: B2 - Application number: 18/109,262 - Filed: 2023-02-14 - Published: 2024-05-30 - Granted: 2024-12-31 - Earliest claimed: 2022-11-29 - Assignees: Xiamen Tianma Display Technology Co., Ltd. - Applicants: Xiamen Tianma Display Technology Co., Ltd. - Inventors: Ke Xiong - Web page: https://patentgrep.com/patent/US12183284B2 ## CPC - G09G 3/3233: with pixel circuitry controlling the current through the light-emitting element - H10K 59/1213: {the pixel elements being TFTs} - H10K 59/1216: {the pixel elements being capacitors} - H10K 59/131: Interconnections, e.g. wiring lines or terminals - 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 2310/08: Details of timing specific for flat panels, other than clock recovery - G09G 2320/0233: Improving the luminance or brightness uniformity across the screen - 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 ## Abstract A pixel driving circuit includes a driving circuit, configured to provide a driving current for a light-emitting element; a data writing circuit electrically connected to a first scan signal terminal, a data signal terminal, and a first terminal of the driving circuit; a threshold compensation circuit electrically connected to a second scan signal terminal, a control terminal of the driving circuit, and a second terminal of the driving circuit; and a first storage circuit electrically connected to the driving circuit and the light-emitting element. In a threshold compensation phase, the data writing circuit turns on in response to a turn-on level provided by the first scan signal terminal, and the threshold compensation circuit turns on in response to a turn-on level provided by the second scan signal terminal. In a light emission phase, the first storage circuit adjusts a potential of the control terminal of the driving circuit in response to a change in potential of the first electrode of the light-emitting element. ## Claims ### Claim 1 A pixel driving circuit, comprising: a driving circuit configured to provide a driving current for a light-emitting element; a data writing circuit, wherein a control terminal of the data writing circuit is electrically connected to a first scan signal terminal, a first terminal of the data writing circuit is electrically connected to a data signal terminal, and a second terminal of the data writing circuit is electrically connected to a first terminal of the driving circuit; a threshold compensation circuit, wherein a control terminal of the threshold compensation circuit is electrically connected to a second scan signal terminal, a first terminal of the threshold compensation circuit is electrically connected to a control terminal of the driving circuit, and a second terminal of the threshold compensation circuit is electrically connected to a second terminal of the driving circuit; and a first storage circuit, wherein a first terminal of the first storage circuit is electrically connected to the control terminal of the driving circuit, and a second terminal of the first storage circuit is electrically connected to a first electrode of the light-emitting element, wherein: in a threshold compensation phase, the data writing circuit turns on in response to a turn-on level provided by the first scan signal terminal, and the threshold compensation circuit turns on in response to a turn-on level provided by the second scan signal terminal; and in a light emission phase, the first storage circuit adjusts a potential of the control terminal of the driving circuit in response to a change in potential of the first electrode of the light-emitting element. ### Claim 2 (depends on 1) The pixel driving circuit according to claim 1, wherein: the first storage circuit includes a first storage capacitor, wherein a first plate of the first storage capacitor is electrically connected to the control terminal of the driving circuit, and a second plate of the first storage capacitor is electrically connected to the first electrode of the light-emitting element; and in the light emission phase, the first storage capacitor adjusts the potential of the control terminal of the driving circuit in response to the change in potential of the first electrode of the light-emitting element. ### Claim 3 (depends on 1) The pixel driving circuit according to claim 1, further comprising: a first reset circuit, wherein a control terminal of the first reset circuit is electrically connected to a third scan signal terminal, a first terminal of the first reset circuit is electrically connected to a first initialization signal terminal, and a second terminal of the first reset circuit is electrically connected to the control terminal of the driving circuit, and wherein in a first initialization phase before the threshold compensation phase, the first reset circuit turns on in response to a turn-on level provided by the third scan signal terminal. ### Claim 4 (depends on 3) The pixel driving circuit according to claim 3, further comprising: a second reset circuit, wherein a control terminal of the second reset circuit is electrically connected to a fourth scan signal terminal, a first terminal of the second reset circuit is electrically connected to a second initialization signal terminal, and a second terminal of the second reset circuit is electrically connected to the first electrode of the light-emitting element; and wherein in a second initialization phase between the first initialization phase and the threshold compensation phase, the first reset circuit turns on in response to the turn-on level provided by the third scan signal terminal, and the second reset circuit turns on in response to a turn-on level provided by the fourth scan signal terminal. ### Claim 5 (depends on 4) The pixel driving circuit according to claim 4, wherein: in the threshold compensation phase, the second reset circuit turns on in response to the turn-on level provided by the fourth scan signal terminal. ### Claim 6 (depends on 4) The pixel driving circuit according to claim 4, wherein: the fourth scan signal terminal multiplexes the second scan signal terminal; and in the second initialization phase, the threshold compensation circuit turns on in response to the turn-on level provided by the second scan signal terminal. ### Claim 7 (depends on 1) The pixel driving circuit according to claim 1, further comprising: a first reset circuit; a first light emission control circuit; a second light emission control circuit; and a second reset circuit, wherein: the driving circuit includes a first transistor, the data writing circuit includes a second transistor, the threshold compensation circuit includes a third transistor, the first reset circuit includes a fourth transistor, the first light emission control circuit includes a fifth transistor, the second light emission control circuit includes a sixth transistor, the second reset circuit includes a seventh transistor, and the first storage circuit includes a first storage capacitor; a gate of the first transistor is electrically connected to a first node, a first electrode of the first transistor is electrically connected to a second node, and a second electrode of the first transistor is electrically connected to a third node; the first electrode of the light-emitting element is electrically connected to a fourth node, and a second electrode of the light-emitting element is electrically connected to a second power supply voltage signal terminal; a gate of the second transistor is electrically connected to the first scan signal terminal, a first electrode of the second transistor is electrically connected to the data signal terminal, and a second electrode of the second transistor is electrically connected to the second node; a gate of the third transistor is electrically connected to the second scan signal terminal, a first electrode of the third transistor is electrically connected to the first node, and a second electrode of the third transistor is electrically connected to the third node; a gate of the fourth transistor is electrically connected to a third scan signal terminal, a first electrode of the fourth transistor is electrically connected to a first initialization signal terminal, and a second electrode of the fourth transistor is electrically connected to the first node; a gate of the fifth transistor is electrically connected to the light emission control signal terminal, a first electrode of the fifth transistor is electrically connected to a second direct voltage signal terminal, and a second electrode of the fifth transistor is electrically connected to the second node; a gate of the sixth transistor is electrically connected to the light emission control signal terminal, a first electrode of the sixth transistor is electrically connected to the third node, and a second electrode of the sixth transistor is electrically connected to the fourth node; a gate of the seventh transistor is electrically connected to a fourth scan signal terminal, a first electrode of the seventh transistor is electrically connected to a second initialization signal terminal, and a second electrode of the seventh transistor is electrically connected to the fourth node; and a first plate of the first storage capacitor is electrically connected to the first node, and a second plate of the first storage capacitor is electrically connected to the fourth node. ### Claim 8 (depends on 7) The pixel driving circuit according to claim 7, wherein: the first transistor, the second transistor, the third transistor, the fourth transistor, the fifth transistor, the sixth transistor and the seventh transistor are N-type transistors. ### Claim 9 (depends on 1) The pixel driving circuit according to claim 1, further comprising: a bias voltage compensation circuit, wherein a control terminal of the bias voltage compensation circuit is electrically connected to a fifth scan signal terminal, a first terminal of the bias voltage compensation circuit is electrically connected to a bias voltage signal terminal, and a second terminal of the bias voltage compensation circuit is electrically connected to the first terminal or the second terminal of the driving circuit, and wherein before the light emission phase, the bias voltage compensation circuit is configured to turn on in response to a turn-on level provided by the fifth scan signal terminal and transmit a bias voltage signal of the bias voltage signal terminal to the first terminal or the second terminal of the driving circuit. ### Claim 10 A display device, comprising: a pixel driving circuit; or an array substrate, wherein the pixel driving circuit comprises: a driving circuit configured to provide a driving current for a light-emitting element; a data writing circuit, wherein a control terminal of the data writing circuit is electrically connected to a first scan signal terminal, a first terminal of the data writing circuit is electrically connected to a data signal terminal, and a second terminal of the data writing circuit is electrically connected to a first terminal of the driving circuit; a threshold compensation circuit, wherein a control terminal of the threshold compensation circuit is electrically connected to a second scan signal terminal, a first terminal of the threshold compensation circuit is electrically connected to a control terminal of the driving circuit, and a second terminal of the threshold compensation circuit is electrically connected to a second terminal of the driving circuit; and a first storage circuit, wherein a first terminal of the first storage circuit is electrically connected to the control terminal of the driving circuit, and a second terminal of the first storage circuit is electrically connected to a first electrode of the light-emitting element, wherein: in a threshold compensation phase, the data writing circuit turns on in response to a turn-on level provided by the first scan signal terminal, and the threshold compensation circuit turns on in response to a turn-on level provided by the second scan signal terminal; and in a light emission phase, the first storage circuit adjusts a potential of the control terminal of the driving circuit in response to a change in potential of the first electrode of the light-emitting element; and the array substrate comprises: a first direct voltage signal line extending along a first direction; a second direct voltage signal line extending along a second direction, the first direction intersecting the second direction; and a plurality of pixel driving circuits, wherein the plurality of pixel driving circuits are arranged in an array along the first direction and the second direction, and the plurality of pixel driving circuits are respectively electrically connected to the first direct voltage signal line and the second direct voltage signal line, wherein a pixel driving circuit of the plurality of pixel driving circuits comprises: a first transistor, wherein a gate of the first transistor is electrically connected to a first node, and the first transistor is configured to provide a driving current for a light-emitting element included in the array substrate; and a first storage capacitor, wherein a first plate of the first storage capacitor is electrically connected to the first node, and a second plate of the first storage capacitor is electrically connected to a first electrode of the light-emitting element included in the array substrate through a first connection part.