Patent ID: 7502000
Filing Date: 2009-03-10
Classification: G09G

Abstract:
1. A drive circuit comprising: a drive transistor for feeding to a load a drive current corresponding to an input signal, wherein the drive circuit has a correction circuit that supplies a correction signal corresponding to an impedance of the load to a gate of the drive transistor to correct the drive current to be fed to the load by the drive transistor, and wherein the load is a light-emitting element, one terminal of the light-emitting element is connected to a gate of a transistor for correction, and when a predetermined potential Ps is set to a value calculated by deducting a threshold voltage Vth of the transistor for correction from a terminal potential Pi of the light-emitting element with respect to a drive current, the drive circuit sets a source potential of the transistor for correction to the predetermined potential Ps to thereby generate a voltage corresponding to an impedance of the light-emitting element as a source-to-drain current of the transistor for correction.