AMBIENT LIGHT SENSOR WITH REDUCED SENSITIVITY TO NOISE FROM INFRARED SOURCES
First Claim
1. An electronic device comprising:
- an infrared sensor configured to an intensity of infrared light;
an ambient light sensor configured to detect incident light, wherein the ambient light sensor is configured to generate an electronic signal indicative of an intensity of visible light;
a decoder configured to receive the intensity of infrared light and to generate an intensity of decoded infrared light; and
a processor coupled to the decoder and the ambient light sensor, wherein the processor is configured to substitute an alternate electronic signal for the electronic signal if the intensity of the decoded infrared light exceeds a threshold amount.
1 Assignment
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Accused Products
Abstract
Systems and methods are provided for detecting ambient light with reduced sensitivity to infrared sources. An electronic device may include an infrared sensor, an ambient light sensor, a decoder, and a processor. The infrared sensor may detect an intensity of infrared light. The ambient light sensor may be configured to detect incident light and to generate an electronic signal indicative of an intensity of visible light. The decoder may be configured to receive the intensity of infrared light and to generate an intensity of decoded infrared light. The processor, which may be coupled to the decoder and the ambient light sensor, may be configured to substitute an alternate electronic signal for the electronic signal if the intensity of infrared light exceeds a threshold amount.
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Citations
18 Claims
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1. An electronic device comprising:
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an infrared sensor configured to an intensity of infrared light; an ambient light sensor configured to detect incident light, wherein the ambient light sensor is configured to generate an electronic signal indicative of an intensity of visible light; a decoder configured to receive the intensity of infrared light and to generate an intensity of decoded infrared light; and a processor coupled to the decoder and the ambient light sensor, wherein the processor is configured to substitute an alternate electronic signal for the electronic signal if the intensity of the decoded infrared light exceeds a threshold amount. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An ambient light sensor module comprising:
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an infrared filter for transmitting incident light over a band of near-infrared wavelengths; an infrared sensor for receiving light transmitted by the infrared filter and for detecting an intensity of infrared light over near-infrared wavelengths; and an ambient light sensor for detecting an intensity of visible light and for generating an electronic signal indicative of an intensity of ambient light, wherein the ambient light sensor is configured to modify the electronic signal based on the intensity of the infrared light.
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8. A method for controlling an electronic device comprising:
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detecting an intensity of all light at substantially any wavelength; detecting an intensity of infrared light at near-infrared wavelengths; generating an electronic signal indicative of an intensity of ambient light based on a difference between the intensity of all light and the intensity of infrared light; and generating a control signal based on the electronic signal or, if the intensity of infrared light exceeds a threshold intensity, generating the control signal based on an alternate electronic signal. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. An ambient light sensor module comprising:
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a first sensor for detecting an intensity of all light at substantially any wavelength; a second sensor for detecting an intensity of infrared light over near-infrared wavelengths; and a light processing module coupled to the first sensor and the second sensor, wherein the light processing module is configured to determine an intensity of visible light based on a difference between the intensity of all light and the intensity of infrared light, and wherein the light processing module is configured to substitute an alternative intensity of visible light for the intensity of visible light if the intensity of infrared light exceeds a threshold amount. - View Dependent Claims (17)
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18. The method of claim 18, wherein the blocking signal is a carrier sense signal, decoded byte signal, or a decoded bit signal.
Specification