Patent ID: 8294641

Claim:
Active matrix display device ( 6 ) comprising a display ( 2 ) with a plurality of display pixels ( 3 ), each having: a current driven emissive element ( 14 ); a data input ( 10 ) for receiving an analogue data signal; at least one drive element (T 2 ) connected to a power supply and arranged to drive said current emissive element ( 14 ) in accordance with said data signal; selecting means arranged to provide, in response to a select signal ( 18 ), said data signal to said at least one drive element (T 2 ), said data signal provided during a frame period generating a brightness level, wherein said device ( 6 ) is adapted to divide said frame period (F) into a first sub-period (F 1 ) during which said emissive element ( 14 ) carries a first non-zero current (I 1 ) and a second sub-period (F 2 ) during which said emissive element ( 14 ) carries a second non-zero current ( 12 ), wherein said second non-zero current is maintained at a stable level lower than the first nonzero current and said first non-zero current being reduced in value based on a known ratio with respect to said second non-zero current, said second non-zero current during said second sub-period achieving a brightness that is known percentage of a brightness achieved by said first non-zero current in said first sub-period, wherein said at least first and second non-zero current over their respective sub-periods together yields a brightness level substantially equal to said brightness level generated by said data signal provided during said frame period.