Patent ID: 8743096

Claim:
A method of operating a pixel array having pixel circuits arranged in rows and columns, each of the pixel circuits including a switch, a select line connected to the switch, a drive transistor coupled to a data line via the switch and to a controllable power supply line, a light emitting device coupled to the drive transistor, and a storage capacitor coupled to the drive transistor, the method comprising: programming a first of the pixel circuits responsive to driving the select line for the first pixel circuit from a first state to a second state to select the first pixel circuit for programming, the programming including: during a first operating cycle, adjusting the controllable power supply line for the first pixel circuit to a first voltage while applying on the data line for the first pixel circuit a second voltage of opposite polarity to that of the first voltage; responsive to the first operating cycle, during a second operating cycle, changing the controllable power supply line to a driving voltage corresponding to a voltage used to drive the light emitting device of the first pixel circuit, the driving voltage being different from the first voltage; and responsive to the second operating cycle, during a programming cycle, changing the controllable power supply line for the first pixel circuit to a third voltage different from the first voltage and the driving voltage while applying at least a programming voltage on the data line for the first pixel circuit.