Backlight control for a handheld computing device

Details Backlight control for a handheld computing device Backlight control for a handheld computing device

2006-12-05

2006-12-05

Cariaso, Alan (Department: 2875)

Illumination

Light source and modifier

With rheostat or switch

C362S085000, C362S109000, C362S276000, C362S802000

Reexamination Certificate

active

07144136

ABSTRACT:
In a handheld computing device that includes a backlit display having a variable-intensity backlight, and a function key, a method for controlling an intensity of light produced by the backlight involves the steps of (1) setting the intensity to a first level sufficient for viewing information on the display under first ambient lighting; and (2) upon activation of the function key, setting the intensity to a second level sufficient for viewing information on the backlit display under second ambient lighting that is different than the first ambient lighting.

REFERENCES:
patent: 5736973 (1998-04-01), Godfrey et al.
patent: 7027295 (2006-04-01), Holmes et al.
patent: 2001/0013854 (2001-08-01), Ogoro
patent: 2004/0012556 (2004-01-01), Yong et al.
patent: 2005/0225983 (2005-10-01), Fornell
patent: 0 496 383 (1992-07-01), None
patent: 1 202 243 (2002-05-01), None

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