摘要 |
A pixel cell in an active matrix display comprising a current driven emissive element such as an OLED ( 20 ) and a data input ( 17 ) for receiving an analogue data signal (V<SUB>in</SUB>). The pixel has at least two drive elements ( 12, 14 ), each being connected to a power supply ( 16 ) and arranged to drive the emissive element in accordance with the data signal, and selecting means ( 22, 24 ) for providing, in response to a select signal ( 21, 23 ), the data signal to at least one of the drive elements ( 12, 14 ). Further, each drive element is adapted to drive the emissive element ( 20 ) in a different drive current range in response to a given data signal. Thereby, a required brightness range can be obtained while data voltages too close to the threshold voltage may be avoided.
|