Patent ID: 11915648
Assignee: CHENGDU BOE OPTOELECTRONICS TECHNOLOGY CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 7:
8. A display apparatus, comprising:
a display panel having a plurality of sub-pixels, each sub-pixel including:
a light emitting device;
a pixel driving circuit configured to provide a driving signal for driving the light emitting device to emit light; and
an emission time control circuit electrically connected between the pixel driving circuit and the light emitting device, and configured to connect the pixel driving circuit to the light emitting device in response to an emission time control signal, so as to control a duration of transmission of the driving signal to the light emitting device; and

an emission time control chip including at least one output terminal, emission time control circuits of the plurality of sub-pixels being electrically connected to the at least one output terminal; and the emission time control chip being configured to transmit emission time control signals to the emission time control circuits of the plurality of sub-pixels through the at least one output terminal, and the emission time control signals being pulse width modulation signals; wherein
the display panel further includes a data voltage terminal, a scan signal terminal, a first voltage terminal, and an emission control signal terminal; and the pixel driving circuit includes a writing sub-circuit, a driving sub-circuit, and an emission control sub-circuit;
the writing sub-circuit is electrically connected to the driving sub-circuit, the data voltage terminal, and the scan signal terminal, and is configured to write a data signal from the data voltage terminal into the driving sub-circuit in response to a scan signal from the scan signal terminal to perform a compensation of a threshold voltage on the driving sub-circuit;
the driving sub-circuit is electrically connected to the emission control sub-circuit and the first voltage terminal, and is configured to output the driving signal according to the data signal written into the driving sub-circuit and a first voltage signal from the first voltage terminal in response to the emission control sub-circuit;
the emission control sub-circuit is electrically connected to the emission control signal terminal, the first voltage terminal, and the emission time control circuit, and is configured to: in response to an emission control signal from the emission control signal terminal, connect the first voltage terminal to the driving sub-circuit and connect the driving sub-circuit to the emission time control circuit; and
the emission time control circuit is electrically connected to the emission control sub-circuit, and is configured to connect the emission control sub-circuit to the light emitting device in response to the emission time control signal.