AMBIENT LIGHT SENSING USING A COLOR SENSOR
First Claim
1. An ambient light sensor (ALS) system comprising:
- a polychromatic color sensor to generate a plurality of analog signals from a corresponding plurality of color channels based on a detected ambient light signal;
an analog-to-digital converter (ADC) coupled to the polychromatic color sensor, the analog-to-digital converter to convert the plurality of analog signals to a plurality of digital signals;
a digital processor coupled to the analog-to-digital converter, the digital processor to generate a processed light signal according to a mapping of individual color responses to a standard color space, wherein the processed light signal describes a characteristic of the detected ambient light signal; and
a memory device coupled to the digital processor, the memory device to store a correlated color temperature algorithm, wherein the digital processor is further configured to generate the processed light signal according to the correlated color temperature algorithm stored in the memory device.
2 Assignments
0 Petitions
Accused Products
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.
-
Citations
20 Claims
-
1. An ambient light sensor (ALS) system comprising:
-
a polychromatic color sensor to generate a plurality of analog signals from a corresponding plurality of color channels based on a detected ambient light signal; an analog-to-digital converter (ADC) coupled to the polychromatic color sensor, the analog-to-digital converter to convert the plurality of analog signals to a plurality of digital signals; a digital processor coupled to the analog-to-digital converter, the digital processor to generate a processed light signal according to a mapping of individual color responses to a standard color space, wherein the processed light signal describes a characteristic of the detected ambient light signal; and a memory device coupled to the digital processor, the memory device to store a correlated color temperature algorithm, wherein the digital processor is further configured to generate the processed light signal according to the correlated color temperature algorithm stored in the memory device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. An apparatus to monitor ambient light, the apparatus comprising:
-
means for receiving a light signal from an ambient light source; means for mapping individual color responses to a standard color space to generate a plurality of sensor signals from the received light signal, wherein the plurality of sensor signals corresponds to a plurality of color channels; means for storing a correlated color temperature algorithm; and means for generating a processed light signal according to the correlated color temperature algorithm, wherein the processed light signal describes a characteristic of the received light signal. - View Dependent Claims (14, 15, 16, 17)
-
-
18. A method for sensing ambient light conditions, the method comprising:
-
storing a correlated color temperature algorithm; receiving a light signal from an ambient light source; mapping individual color responses of the received light signal to a standard color space to generate a plurality of sensor signals based on the received light signal, wherein each of the plurality of sensor signals is associated with a corresponding one of a plurality of color channels; and generating a processed light signal according to the correlated color temperature algorithm based on at least one of the sensor signals, wherein the processed light signal describes a characteristic of the received light signal. - View Dependent Claims (19, 20)
-
Specification