PORTABLE PHONE TERMINAL, IMAGE DISPLAY CONTROLLING METHOD, PROGRAM THEREOF, AND PROGRAM RECORDING MEDIUM

摘要

A mobile phone terminal capable of reducing consumed power without lowering display quality is provided. Luminance levels of a backlight 3 corresponding to gradations of a display image are registered as reference luminance values to a reference luminance value table 5a, signal levels of a drive signal to an LED driver 4 corresponding to reference luminance values are registered as luminance setting values to a backlight luminance setting value table 6a, and values to correct a drive level of a liquid-crystal panel corresponding to gradations of the display image are registered as gamma correction values to a gamma correction value table 7a. According to the gradation of an image to be displayed, a signal level of the drive signal corresponding to the reference luminance value attained from the reference luminance value table 5a is obtained from the backlight luminance setting value table 6a, to thereby drive the LED driver 4; and an LCD driver 2 is driven by a value obtained through correction by the gamma correction value obtained from the gamma correction value table 7a, to thereby display an image. The values acquired from the respective tables may be changed by a user, a used scene, and a detection result from an illumination sensor 11.