Patent ID: 11967285
Assignee: BOE TECHNOLOGY GROUP CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 15:
16. A display apparatus, comprising:
a display panel, wherein the display panel includes a plurality of sub-pixels, each sub-pixel includes a pixel driving circuit and a first light-emitting device, the pixel driving circuit includes at least a driving transistor and a sensing transistor, a first electrode of the driving transistor is electrically connected to a power supply voltage signal terminal, a first electrode of the sensing transistor is electrically connected to a sensing signal terminal, a second electrode of the driving transistor is electrically connected to a second electrode of the sensing transistor and a first electrode of the first light-emitting device, and a second electrode of the first light-emitting device is electrically connected to a first voltage signal terminal; and
wherein the sensing signal terminal is configured to transmit an initial signal to the second electrode of the sensing transistor and the second electrode of the driving transistor in a sensing period; and

a variable power supply voltage supply device, wherein the variable power supply voltage supply device is electrically connected to the power supply voltage signal terminal, and the variable power supply voltage supply device is configured to: provide a variable power supply voltage signal, provide a first power supply voltage signal to the sub-pixel in a driving period, and provide a second power supply voltage signal to the sub-pixel in the sensing period, so that an operating point of the driving transistor of the sub-pixel maintains consistent in the sensing period and the driving period; and
wherein a relationship between a voltage Vdd2 of the second power supply voltage signal and a voltage Vdd1 of the first power supply voltage signal, a voltage V2 of the second electrode of the driving transistor in the driving period, and a voltage Vini of the initial signal is: Vdd2=Vini+(Vdd1−V2).