Proximity sensor and control method thereof
AssigneeLG Electronics Inc.
InventorsYoungjun Cho, Sunuk Kim, Munchae Joung
Life of this patent
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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.
Claims15
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, 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.
A method of controlling a proximity sensor, the method comprising:
- 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.
Dependencies are inferred from the claim text.