Patent · US Active

Ambient light sensing using a color sensor

US7446303B2 · kind B2 · utility

58Cited by

3References

20Claims

0Family size

Assignee

Avago Technologies ECBU IP (Singapore) Pte. Ltd. · SG

Inventors

Selvan Maniam · Bukit Mertajam, MY
Kean Loo Keh · Air Itam, MY
Farn Hin Chen · Ipoh, MY

Key dates

Filing date	Jan 31, 2007
Grant date	Nov 4, 2008
Priority date	—
Expiry date	Jan 31, 2027

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02B20/40
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

An ambient light sensor (ALS) system is described. The ALS system includes a polychromatic color sensor, an analog-to-digital converter (ADC), and a digital processor. The polychromatic color sensor generates a plurality of analog signals from a corresponding plurality of color channels based on a detected ambient light signal. The ADC is coupled to the polychromatic color sensor. The ADC converts the plurality of analog signals to a plurality of digital signals. The digital processor is coupled to the ADC. The digital processor generates a processed light signal. The processed light signal describes a characteristic of the detected ambient light signal. Embodiments of the ALS system provide a more comprehensive characterization of the ambient light, and facilitate control of a device based on the characterization of the ambient light.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.