Patent ID: 8810609

Claim:
A mobile terminal, comprising: a conversion data setting unit which sets which conversion data to use as the conversion data for converting a contrast difference in data for display out of a plurality of the conversion data, the conversion data including first white conversion data, black conversion data, and second white conversion data; a data conversion unit which performs processing which makes the contrast difference in the data for display uniformly small using the conversion data set by the conversion data setting unit, the processing including: black processing using the black conversion data to decrease a black group range of the data from an original black range between an original most black level and an original least black level to a new black range between the original most black level and a new least black level that is greater than the original least black level; first white processing using the first white conversion data to decrease a white group range of the data from an original white range between an original most white level and an original least white level to a new white range between a new most white level that is less than the original most white level and the original least white level; second white processing using the second white conversion data to decrease the white group range of the data from the original white range to another new white range between another new most white level that is less than the original most white level and a new least white value that is greater than the original least white level; and a display alteration unit which alters a displayed content on a display screen based on the data for display converted by the data conversion unit, by selecting one of the black processing, the first white processing, and the second white processing based on an ambient light condition to decrease visibility of the displayed content.