Backlight current control in portable electronic devices
First Claim
Patent Images
1. A portable electronic device comprising:
- a controller;
an event trigger other than one caused by a light sensor;
a user interface backlight coupled to the controller;
a light sensor coupled to the controller; and
a current source coupled to the controller,the controller being configured to;
activate the user interface backlight illumination based upon the event trigger; and
to control current to the user interface backlight based on the ambient light detected by the light sensor.
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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.
6 Citations
10 Claims
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1. A portable electronic device comprising:
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a controller; an event trigger other than one caused by a light sensor; a user interface backlight coupled to the controller; a light sensor coupled to the controller; and a current source coupled to the controller, the controller being configured to;
activate the user interface backlight illumination based upon the event trigger; and
to control current to the user interface backlight based on the ambient light detected by the light sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification