Patent ID: 8264437

Claim:
A portable handheld communication device comprising: a housing; a display provided on a surface of the housing; a light sensor, provided on the surface of the housing, to sense ambient light; a memory to store: multiple versions of a first particular image, of a plurality of a first type of images, wherein the multiple versions of the particular image vary in contrast, and a plurality of images, of a second type, for which no corresponding monochromatic versions are stored in the memory; and a controller coupled to the display and the light sensor, wherein, when a light level of the ambient light exceeds a threshold value, the controller is configured to: assign first pixel colors and/or shades to black, and second pixel colors and/or shades to white, convert, based on the assignment, a second particular image, of the second type of images, to a monochromatic image, change a display mode of the display, from a first display mode to a monochromatic display mode, for presenting at least one of the first particular image or the converted second particular image on a background present on the display, and retain, in the first display mode, the display mode for presenting one or more images of the second type of images.