Backlight current control in portable electronic devices

Details Backlight current control in portable electronic devices Backlight current control in portable electronic devices

2004-10-27

2010-10-05

Vu, David Hung (Department: 2821)

Electric lamp and discharge devices: systems

With radiant energy sensitive control means

Discharge control discharge device load controlled by the...

C315S158000, C315S159000, C345S102000

Reexamination Certificate

active

07808185

ABSTRACT:
A method in a portable electronic device (100) having a user interface illumination (110) is disclosed. The method comprises sensing (202) an ambient light level in a neighborhood of the portable electronic device with a sensor (104) of the portable electronic device. Based on the ambient light level sensed, then controlling (204) a visual characteristic of the user interface illumination, wherein the user interface illumination is operated at a brightness between a maximum brightness and a minimum brightness for at least one ambient light level detected.

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patent: 2005/0093466 (2005-05-01), Matsumoto
patent: 0 381 684 (1994-12-01), None

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