Ambient light sensor calibration
First Claim
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1. A system for calibrating a sensor of an electronic device, the system comprising:
- an illumination assembly comprising;
a first light emitter configured to emit first light having a first wavelength;
a second light emitter configured to emit second light having a second wavelength;
a first light combiner comprising a first exit port;
a first light diffuser positioned between the first light emitter and the first light combiner, the first light diffuser being configured to receive the first light and output first diffuse light; and
a second light diffuser positioned between the second light emitter and the first light combiner, the second light diffuser being configured to receive the second light and output second diffuse light; and
wherein the first light combiner is configured to;
receive the first diffuse light and to output the first diffuse light via the first exit port of the first light combiner; and
receive the second diffuse light and to output the second diffuse light via the first exit port of the first light combiner; and
an opaque housing comprising an interior region enclosing the illumination assembly, wherein the opaque housing is effective to reduce an amount of light from an exterior of the opaque housing from entering the interior region of the opaque housing.
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Abstract
An ambient light sensor of an electronic device is calibrated using a calibration device and method which combines multiple sources of light having different wavelengths into a single calibration beam of light. This calibration beam of light provides a consistent and reproducible methodology for testing and calibrating the ambient light sensor.
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Citations
20 Claims
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1. A system for calibrating a sensor of an electronic device, the system comprising:
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an illumination assembly comprising; a first light emitter configured to emit first light having a first wavelength; a second light emitter configured to emit second light having a second wavelength; a first light combiner comprising a first exit port; a first light diffuser positioned between the first light emitter and the first light combiner, the first light diffuser being configured to receive the first light and output first diffuse light; and a second light diffuser positioned between the second light emitter and the first light combiner, the second light diffuser being configured to receive the second light and output second diffuse light; and wherein the first light combiner is configured to; receive the first diffuse light and to output the first diffuse light via the first exit port of the first light combiner; and receive the second diffuse light and to output the second diffuse light via the first exit port of the first light combiner; and an opaque housing comprising an interior region enclosing the illumination assembly, wherein the opaque housing is effective to reduce an amount of light from an exterior of the opaque housing from entering the interior region of the opaque housing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method comprising:
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emitting, by a first light emitting device, first light having a first wavelength and a first irradiance; diffusing, by a first diffuser positioned between the first light emitting device and a first light combiner, the first light to output first diffuse light; receiving, by the first light combiner, the first diffuse light; directing, by the first light combiner, the first diffuse light along a first light path towards an ambient light sensor; emitting, by a second light emitting device, second light having a second wavelength and a second irradiance; diffusing, by a second diffuser positioned between the second light emitting device and the first light combiner, the second light to output second diffuse light; receiving, by the first light combiner, the second diffuse light; directing, by the first light combiner, the second diffuse light along the first light path towards the ambient light sensor; receiving, by the ambient light sensor, at least the first diffuse light and the second diffuse light through an exit port of an opaque housing; and calibrating the ambient light sensor with at least the first diffuse light and the second diffuse light. - View Dependent Claims (15, 16, 17)
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18. A system for calibrating a sensor of an electronic device, the system comprising:
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an illumination assembly comprising; a first light emitter configured to emit first light having a first wavelength; a first light collimator positioned between the first light emitter and a first light diffuser, the first light collimator configured to collimate the first light; the first light diffuser positioned between the first light collimator and a first light combiner, the first light diffuser configured to output first diffuse light; and a second light emitter configured to emit second light having a second wavelength; wherein the first light combiner comprises a first exit port and is configured to; receive the first diffuse light and to output the first diffuse light via the first exit port of the first light combiner; and receive the second light and to output the second light via the first exit port of the first light combiner; and an opaque housing comprising an interior region enclosing the illumination assembly, wherein the opaque housing is effective to reduce an amount of light from an exterior of the opaque housing from entering the interior region of the opaque housing. - View Dependent Claims (19, 20)
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Specification