Proximity sensor and control method thereof
First Claim
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1. A proximity sensor comprising:
- a light-emitting part that is configured to emit a first light of a first wavelength band;
a light-receiving part that is configured to receive the first light of the first wavelength band emitted by the light-emitting part and a second light of a second wavelength band different from the first wavelength band, the second light emitted by a light source other than the light-emitting part; and
a controller that is configured to recognize a proximate object based on at least a portion of the first light of the first wavelength band that is reflected by the proximate object and received by the light-receiving part,wherein the controller is configured to change a light-reception range of the light-receiving part based on an amount of illumination received from the second light of the second wavelength band, andwherein the controller is configured to change, based on an amount of illumination received from the second light of the second wavelength band, a quantity and a light-emitting duration of the first light of the first wavelength band emitted by the light-emitting part based on comparing a predetermined value with an integral of time variations of received illumination comprising at least a portion of the first light of the first wavelength band that has been reflected and received by the light-receiving part.
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Abstract
The present disclosure provides a proximity sensor including a light-emitting part that is configured to emit first light of a specific wavelength band, a light-receiving part that is configured to receive the first light and second light, the second light belonging to a different wavelength band from the first light, and a controller that is configured to recognize a proximate object based on the first light reflected by the proximate object, wherein the controller changes a light-reception range of the light-receiving part based on the second light.
18 Citations
15 Claims
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1. A proximity sensor comprising:
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a light-emitting part that is configured to emit a first light of a first wavelength band; a light-receiving part that is configured to receive the first light of the first wavelength band emitted by the light-emitting part and a second light of a second wavelength band different from the first wavelength band, the second light emitted by a light source other than the light-emitting part; and a controller that is configured to recognize a proximate object based on at least a portion of the first light of the first wavelength band that is reflected by the proximate object and received by the light-receiving part, wherein the controller is configured to change a light-reception range of the light-receiving part based on an amount of illumination received from the second light of the second wavelength band, and wherein the controller is configured to change, based on an amount of illumination received from the second light of the second wavelength band, a quantity and a light-emitting duration of the first light of the first wavelength band emitted by the light-emitting part based on comparing a predetermined value with an integral of time variations of received illumination comprising at least a portion of the first light of the first wavelength band that has been reflected and received by the light-receiving part. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of controlling a proximity sensor, the method comprising:
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emitting, by a light-emitting part, a first light of a first wavelength band; receiving the emitted first light of the first wavelength band and a second light of a second wavelength band different than the first wavelength band, the second light emitted by a light source other than the light-emitting part; changing a light-reception range of the first light of the first wavelength band based on an amount of illumination received from the second light of the second wavelength band; recognizing a proximate object based on at least a portion of the first light of the first wavelength band that is reflected by the proximate object and received; and changing, based on the amount of received illumination from the second light of the second wavelength band, a quantity and a light-emitting duration of the emitted first light of the first wavelength band based on comparing a predetermined value with an integral of time variations of received illumination comprising at least a portion of the first light of the first wavelength band that has been reflected and received. - View Dependent Claims (13, 14, 15)
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Specification