Patent ID: 11961470
Assignee: BOE TECHNOLOGY GROUP CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 14:
15. A sensing method of luminous efficiency of the light emitting unit of the pixel driving module of claim 5, comprising:
in a third reset phase, controlling the second switch and the third switch to be turned on and the first switch, the fourth switch, the fifth switch and the sixth switch to be turned off; inputting a turn-on signal to the gate of the second transistor via the first gate line terminal; not inputting a turn-on signal to the gate of the third transistor via the second gate line terminal, and inputting a third data signal to the first electrode of the second transistor via the data line terminal, such that a signal from the first signal terminal is written to the sensing line, and the third data signal is written to the storage capacitor;
in a third charging phase, not inputting a turn-on signal to the gate of the second transistor and the gate of the third transistor via the first gate line terminal and the second gate line terminal, respectively; and controlling the first switch, the second switch, the third switch, the fourth switch, the fifth switch and the sixth switch to be turned off, such that a signal from the first voltage terminal is written to the fourth node;
in a stabilization phase, inputting a turn-on signal to the gate of the second transistor via the first gate line terminal, and not inputting a turn-on signal to the gate of the third transistor via the second gate line terminal; controlling the first switch, the second switch, the third switch, the fourth switch, the fifth switch and the sixth switch to be turned off; and inputting a fourth data signal to the first electrode of the second transistor via the data line terminal, so as to maintain a voltage at the fourth node stable; and
in a third sensing phase, inputting a turn-on signal to the gate of the third transistor via the second gate line terminal, and not inputting a turn-on signal to the gate of the second transistor via the first gate line terminal; controlling the first switch, the third switch and the fourth switch to be turned on and the second switch, the fifth switch and the sixth switch to be turned off, such that the voltage at the fourth node is written to the integration capacitor, and the luminous efficiency of the light emitting unit is calculated according to a capacitance of the integration capacitor and the voltage at the fourth node.