An image display device and image display method are provided. The device
and method can prevent changes in image density and contrast, which are
caused by repeated displaying over long periods of time and changes in
environment, by employing accurate electric current detection, due to the
following operations. Voltage measurement is initiated with a detection
circuit. Next, the application of drive voltage is initiated with a drive
power source. An electric current value is calculated from the measured
voltage value and the electric current value is temporarily stored. The
electric current values are stored every set amount of time and the
storage thereof accumulates. Application of the drive voltage is
terminated and the integral value of the electric current is calculated
in accordance with formulas.