Backlight current control in portable electronic devices
First Claim
Patent Images
1. A method in a portable electronic device having a user interface backlight, the method comprising:
- detecting an ambient light level in a neighborhood of the portable electronic device with a sensor of the portable electronic device; and
controlling brightness of the user interface illumination based on the ambient light level detected, wherein the user interface backlight 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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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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Citations
20 Claims
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1. A method in a portable electronic device having a user interface backlight, the method comprising:
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detecting an ambient light level in a neighborhood of the portable electronic device with a sensor of the portable electronic device; and
controlling brightness of the user interface illumination based on the ambient light level detected, wherein the user interface backlight is operated at a brightness between a maximum brightness and a minimum brightness for at least one ambient light level detected. - View Dependent Claims (2, 3, 4, 5)
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6. A portable electronic device comprising:
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a controller;
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 controlling current to the user interface backlight based on ambient light detected by the light sensor, whereby brightness of the user interface backlight varies with the ambient current to the user interface backlight. - View Dependent Claims (7, 8, 9)
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10. A method in a portable electronic device having a user interface, the method comprising:
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measuring an ambient light level with a light sensor carried on the portable electronic device in response to an event associated with the device;
determining a correlation between the ambient light level and the event; and
controlling the brightness of the user interface illumination in response to the determined correlation. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A method in an electronic device having user interface illumination for improving current drain comprising:
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measuring an ambient light level with a light sensor carried on the portable electronic device in response to an event associated with the device;
determining a correlation between the ambient light level and the event; and
controlling a visual characteristic of the user interface in response to the determined correlation. - View Dependent Claims (19, 20)
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Specification