Patent ID: 7679686

Claim:
An electronic device comprising: a first gamma correction unit; a second gamma correction unit; a first organic active layer; and a second organic active layer, wherein the first organic active layer corresponds to the first gamma correction unit, and the second organic active layer corresponds to the second gamma correction unit, the second organic active layer is different from the first organic active layer, wherein the first and second gamma correction units comprise a first tap, a second tap, a fifth tap and a sixth tap wherein: the first tap provides a first lowest value for a first output value for the first gamma correction unit; the second tap provides a first highest value for the first output value for the first gamma correction unit; the fifth tap provides a second lowest value for a second output value for the second gamma correction unit; the sixth tap provides a second highest value for a second output value for the second gamma correction unit; and the first gamma correction unit further comprises a third tap that provides a first intermediate value for the first output value for the first gamma correction unit, wherein: the first intermediate value is between the first lowest value and the first highest value; and the third tap is configured to allow the first intermediate value to be changed after the electronic device has been fabricated; and wherein at least one tap is configured to allow the gamma function for the first and second gamma correction units to be changed after the electronic device has been fabricated.