Patent ID: 9747834
Date: 2017-08-29
CPC Classifications: G09G

Claim:
1. A method of operating a pixel circuit including: a drive transistor including a gate terminal and arranged to convey a drive current through a light emitting device, the drive current being conveyed according to a voltage on the gate terminal; a capacitor connected to the gate terminal of the drive transistor for applying a voltage to the gate terminal according to programming information; a first switch transistor connected between the gate terminal of the drive transistor and a node of the pixel circuit, wherein the node is between the output of the drive transistor and the light emitting device; and a reset capacitor connected between the node and a reset line such that the reset line is capacitively coupled to the gate terminal of the drive transistor while the first switch transistor is turned on; the method comprising: turning on the first switch transistor to capacitively couple the reset line to the gate terminal of the drive transistor only while the first switch transistor is turned on; adjusting the voltage on the reset line to generate a change in voltage at the gate terminal of the drive transistor via the capacitive coupling of the reset capacitor; programming the pixel circuit according to programming information; and driving the pixel circuit to emit light according to the programming information.