Patent ID: 7358941

Claim:
An image display apparatus comprising: a display region having a plurality of pixels, each pixel comprising a current-controlled light emitting element that emits light with a brightness corresponding to a current flowing in the current-controlled light emitting element, a driver element that includes at least first and second terminals and controls the current flowing into the electric light emitting element based on a potential difference applied between the terminals, and a data line that supplies a potential to the first terminal, and a conductive member that is electrically connected to the second terminal; and a threshold voltage obtaining unit that obtains a threshold voltage of the driver element based on the potential of the conductive member corresponding to an amount of charges supplied from the current source to the second terminal, wherein the threshold voltage obtaining unit obtains a threshold voltage based on potentials of the conductive member at two or more different times after the driver element becomes on-state and before the driver element becomes off-state caused by rising of the potential of the conductive member up to a predetermined potential, and the threshold voltage obtaining unit obtains the threshold voltage, and obtains a mobility in a current passage portion of the driver element and a coefficient according to a shape of the current passage portion.