Method and device for ambient light measurement
AssigneeSTMicroelectronics (Research & Development) Limited
InventorJeffrey M. Raynor
Life of this patent
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Abstract
An embodiment method of measuring ambient light comprises generating, by an ambient light sensor associated with a screen which alternates between first phases in which light is emitted and second phases in which no light is emitted by the screen, a first signal representative of an intensity of light received by the ambient light sensor during the first and second phases; comparing the first signal with a threshold intensity value; and controlling a timing of an ambient light measurement by the light sensor based on the comparison.
Claims21
A method of measuring ambient light comprising:
- generating, by an ambient light sensor associated with a screen that alternates between first phases in which light is emitted by the screen, a part of which is received by the ambient light sensor, and second phases in which no light is emitted by the screen, a first signal representative of an intensity of light received by the ambient light sensor during the first and second phases;
- comparing the first signal with a threshold intensity value;
- and
- controlling a timing of an ambient light measurement by the ambient light sensor based on the comparison.
An ambient light sensor associated with a screen that alternates between first phases in which light is emitted by the screen, a part of which is received by the ambient light sensor, and second phases in which no light is emitted by the screen, the ambient light sensor comprising:
- electronic circuitry configured to:
- generate a first signal representative of an intensity of light received by the ambient light sensor during the first and second phases;
- compare the first signal with a threshold intensity value;
- and
- control a timing of an ambient light measurement by the ambient light sensor based on the comparison.
An electronic device comprising:
- a screen;
- a screen driver configured to control the screen to alternate between first phases in which light is emitted by the screen and second phases in which no light is emitted by the screen;
- and
- an ambient light sensor disposed such that a part of the light emitted by the screen is received by the ambient light sensor, the ambient light sensor comprising:
- electronic circuitry configured to:
- generate a first signal representative of an intensity of light received by the ambient light sensor during the first and second phases;
- compare the first signal with a threshold intensity value;
- and
- control a timing of an ambient light measurement by the ambient light sensor based on the comparison.
Dependencies are inferred from the claim text.