Patent ID: 8350834

Claim:
A portable electronic device comprising: a display configured to display an image comprising a plurality of icons or data through providing different color or grey scale fields, where neighboring fields have different luminance; an ambient light detecting unit; and a control unit configured to: receive a luminance value corresponding to detected ambient light from the ambient light detecting unit, compare the luminance value with a first ambient light level threshold, change content of the image, being displayed by the display, to obtain a changed image if the luminance value exceeds the first ambient light level threshold, the control unit being arranged to retain icons or data, of the plurality of icons or data, relating to functions often used by a user, and remove icons or data, of the plurality of icons or data, relating to functions infrequently used by the user, if the luminance value exceeds the first ambient light level threshold, and increase a difference in luminance between neighboring fields of the changed image, if the luminance value exceeds the first ambient light level threshold.