Patent ID: 11948507
Assignee: BOE TECHNOLOGY GROUP CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 10:
11. A method for driving a pixel circuitry, wherein the pixel circuitry comprises a driving circuit, a first switching circuit, a second switching circuit and a light-emitting element, wherein
the driving circuit is configured to, under the control of a voltage transferred by the first switching circuit, drive the light-emitting element to emit light, and the driving circuit comprises a first transistor and a storage capacitor;
the first transistor is a four-end transistor comprising a first end, a second end, a third end and a control end; the control end of the first transistor is electrically connected to the first switching circuit, the first end of the first transistor is electrically connected to a first voltage end, the second end of the first transistor is electrically connected to an anode of the light-emitting element, and the third end of the first transistor is electrically connected to the second switching circuit;
a first end of the storage capacitor is electrically connected to the first voltage end, and a second end of the storage capacitor is electrically connected to the control end of the first transistor;
the first switching circuit is electrically connected to a data sensing line, and configured to write a voltage on the data sensing line into the storage capacitor in an on state in response to a first scanning signal from a first scanning line;
the second switching circuit is electrically connected to the data sensing line, and configured to enable the third end of the first transistor to be electrically connected to the data sensing line in the on state in response to a second scanning signal from a second scanning line;
the control end, the first end and the second end of the first transistor form a primary driving transistor, the control end, the first end and the third end of the first transistor form a secondary driving transistor,
wherein the method comprises:
at a sensing scanning stage, maintaining a potential at the data sensing line to be a sensing voltage for cutting off the secondary driving transistor, to acquire a threshold voltage of the secondary driving transistor, and calculating a threshold voltage of the primary driving transistor in accordance with the threshold voltage of the secondary driving transistor;
at a data scanning stage, applying a compensated data voltage to the data sensing line to drive the light-emitting element to emit light, wherein the compensated data voltage is determined in accordance with the threshold voltage of the primary driving transistor;
wherein the pixel circuitry further comprises a resetting circuit, the data sensing line is electrically connected to the resetting circuit, the resetting circuit is configured to reset a potential at the data sensing line to an initialization voltage in response to a resetting signal, and a secondary driving transistor is configured to be turned on under a control of the initialization voltage.