Patent ID: 11935469
Assignee: BOE TECHNOLOGY GROUP CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. A method for driving a pixel circuit array, wherein the pixel circuit array comprises:
a first signal sensing line and a second signal sensing line; and
N pixel circuits arranged in a column;
wherein all of the N pixel circuits are divided into a first group and a second group, each pixel circuit in the first group is coupled to the first signal sensing line, and each pixel circuit in the second group is coupled to the second signal sensing line different from the first signal sensing line, where N is a positive integer greater than 1; and
wherein the first group and the second group are respectively located in a first region and a second region that do not overlap each other, the first signal sensing line extends only through the first region, the second signal sensing line extends only through the second region, and the first signal sensing line and the second signal sensing line are aligned with each other in a column direction of the N pixel circuits;
wherein the first group comprises 1-st to (N/S)-th pixel circuits of the N pixel circuits, and the second group comprises ((N/S)+1)-th to N-th pixel circuits of the N pixel circuits, wherein S is a factor of N;
wherein N is an even number, and S is equal to 2;
wherein each of the N pixel circuits comprises a light emitting device and a light emission control circuit, and the light emission control circuit is configured to control the light emitting device to emit light or not,
wherein the light emitting device is an organic light emitting diode,
wherein the light emission control circuit comprises a display switching transistor, a driving transistor, a sensing switching transistor, and a storage capacitor which are coupled together, and
wherein each of the display switching transistor, the driving transistor, and the sensing switching transistor comprises a control electrode, a first electrode, and a second electrode, the second electrode of the display switching transistor is coupled to the control electrode of the driving transistor, the first electrode of the driving transistor is configured to be coupled to a high level terminal, the second electrode of the driving transistor is coupled to the first electrode of the sensing switching transistor, and the second electrode of the sensing switching transistor is coupled to the first signal sensing line or the second signal sensing line;
wherein a first terminal of the storage capacitor is coupled to the second electrode of the display switching transistor and the control electrode of the driving transistor, respectively, a second terminal of the storage capacitor is coupled to the second electrode of the driving transistor, the first electrode of the sensing switching transistor, and an anode of the organic light emitting diode, respectively, and a cathode of the organic light emitting diode is configured to be coupled to a low level terminal;
wherein the pixel circuit array further comprises a data line, a first gate line, and a second gate line, wherein the first electrode of the display switching transistor is coupled to the data line, the control electrode of the display switching transistor is coupled to the first gate line, and the control electrode of the sensing switching transistor is coupled to the second gate line;
wherein each of the display switching transistor, the driving transistor, and the sensing switching transistor is an N-type transistor or a P-type transistor; and
the 1-st to (N/2)-th pixel circuit are located in an upper half screen, the ((N/2)+1)-th to N-th pixel circuits are located in a lower half screen, and the method comprises:
providing a turn-on level to the first gate line and the second gate line of each pixel circuit in one of the upper half screen and the lower half screen, respectively, to turn on both the display switching transistor and the sensing switching transistor, so as to input a data voltage provided by the data line to the control electrode of the driving transistor via the display switching transistor, and to input a low level provided by a corresponding one of the first signal sensing line and the second signal sensing line to the second electrode of the driving transistor;
providing a turn-off level to the first gate line and the second gate line of each pixel circuit in the one of the upper half screen and the lower half screen, respectively, to turn off both the display switching transistor and the sensing switching transistor, thereby causing the organic light emitting diode to start light emission; and
during providing the turn-on level to the first gate line and the second gate line of each pixel circuit in the one of the upper half screen and the lower half screen, respectively, providing a turn-on level to the first gate line and the second gate line of each pixel circuit in the other of the upper half screen and the lower half screen to allow the data voltage provided by the data line to be input to the control electrode of the driving transistor via the display switching transistor, and allow a reference voltage provided by a corresponding one of the first and second signal sensing lines to be input to the second electrode of the driving transistor, wherein the reference voltage is higher than the data voltage to make the organic light emitting diode of each pixel circuit in the other of the upper half screen and the lower half screen not emit light.