Patent ID: 7612749

Claim:
A method of driving a pixel circuit that includes a light emitting device, a storage device, a driving device for driving the light emitting device, and a switch, the method comprising: during a first time period, charging the storage device to cause the storage device to store a voltage level representing a threshold voltage of the driving device by flowing a current through the driving device and the switch; after the first time period and before a second time period, switching the switch for reducing a current which is to flow to or from the light emitting device in the second time period; during the second time period, charging the storage device to cause the storage device to store a voltage level representing a sum of a threshold voltage of the driving device and a data voltage representing a level of illumination of the light emitting device; and after the second time period, switching the switch to permit the driving device to drive the light emitting device based on the voltage level stored in the storage device.