Patent ID: 7109990
Filing Date: 2006-09-19
Classification: G09G

Abstract:
1. In an electronic device having a display and a processor, a method for providing contrast adjustment for said display comprising: a) receiving a contrast setting that is user defined via a software graphical user interface, wherein said graphical user interface comprises an interactive slide bar and wherein said electronic device comprises a portable hand held computer system; b) generating signals representative of an ambient temperature of an environment of said display over time, said ambient temperature characterizing said environment; c) sampling said signals and converting said signals into current temperature values; d) based on said contrast setting and said current temperature values, computing a first contrast adjustment voltage signal for maintaining said contrast setting, wherein said c) and d) are performed by said processor; e) automatically adjusting contrast of said display by applying said first contrast adjustment voltage signal to said display; and f) repeating said b)-e), for a second contrast adjustment, wherein a second contrast adjustment voltage signal is computed and wherein said e) further comprises summing said second contrast adjustment voltage signal and said first contrast adjustment voltage signal.