Patent ID: 8269754

Claim:
A mobile terminal comprising: a display unit having first and second display areas; an optical sensor configured to measure brightness of ambient light; and a control unit configured to operate under a first condition in which the brightness measured by the optical sensor is lower than a first threshold and a second condition in which the measured brightness is equal to or higher than the first threshold, under the first condition, controlling the display unit to display a first image in the first display area at a first luminance, and to display a second image in the second display area at the first luminance, only upon detecting the first condition out of the first condition and the second condition, and under the second condition, controlling the display unit to display a third image in the first display area at a second luminance that is higher than the first luminance, and to set a luminance in the second display area to a third luminance that is lower than the first luminance, a content of the third image being determined so as to include a content of the first image and a content of the second image, only upon detecting the second condition out of the first condition and the second condition.