Patent ID: 11468842

Abstract:
A pixel circuit for a display device minimizes the one horizontal time while maintaining accurate compensation of the threshold voltage of the drive transistor, by extending the compensation phase beyond the data programming phase. The pixel circuit includes a drive transistor configured to control an amount of current to a light-emitting device during an emission phase and a storage capacitor connected between the gate of the drive transistor and the light-emitting device for compensating a threshold voltage of the drive transistor. During a combined data programming and threshold compensation phase, data is programmed and the threshold voltage of the drive transistor is partially compensated, with the data voltage being stored by the internal capacitance of the light-emitting device. The data voltage remains stored during an extended compensation phase in which the drive transistor is further compensated. The pixel circuit includes switch transistors that control the application of supply voltages to the drive transistor, storage capacitor, and light-emitting device during the different phases of operation.