Patent ID: 7636073

Claim:
An image display apparatus comprising: a light emitting element; a driver that includes at least a first terminal and a second terminal, and controls the light emitting element based on a potential difference applied between the first terminal and the second terminal; a storage capacitor having a first electrode and a second electrode which is electrically connected to the driver, the storage capacitor serving to retain a potential of the first terminal of the driver; a current source that flows through the driver, a data current corresponding to a display in a black level in order to set a voltage across the first and the second terminals of the driver to a first voltage; a controller that controls a potential of the first electrode of the storage capacitor to change the voltage across the first and the second terminals of the driver from the first voltage to a second voltage, the second voltage being different from the first voltage; and a writing control line that is connected to the first electrode of the storage capacitor, wherein the light emitting element emits light based on the second voltage; wherein the writing control line is commonly connected to all pixels; and wherein the potential difference δV r is represented by an expression (2·i base /1.1β L ) 1/2 ≦δV r ≦(2·i base /0.9β L ) 1/2 , where i base is the amount of electric current applied at the data writing corresponding to the display in the black level, and β L is a value in proportion to mobility of the driver in each pixel.