Patent ID: 7528812

Claim:
An EL display apparatus comprising: a display screen including a plurality of gate signal lines and a plurality of source signal lines which are arranged to intersect with each other, and pixels in each of which an EL light emitting element is formed to correspond to an intersection point of each of the gate signal lines and each of the source signal lines; a current driving device formed for each of the pixels for driving the EL light emitting element by a second current responsive to a source signal represented by a first current; a signal current source for outputting the source signal in response to an image signal to the current driving device via the source signal line; and a precharge voltage source for outputting a predetermined voltage to the source signal line, wherein the current driving device is configured to drive the EL light emitting element by the second current responsive to a voltage of a control terminal connected to the source signal line; and the predetermined voltage corresponds to gray scale data of the image signal.