OBJECT DETECTOR AND SENSOR
First Claim
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1. An object detector, comprising:
- a projector including a light source having a two-dimensionally arranged plurality of light emitter groups, each of the light emitter groups having a plurality of light emitters and configured to emit an adjustable emission light volume;
a light receiver which receives light emitted from the projector and reflected by an object;
a light source driver which illuminates and turns off each of the light emitter groups of the light source; and
a processor which sequentially illuminates and turns off the plurality of light emitter groups using the light source driver, and obtains distance information to the object based on lighting-on timing of one of the light emitter groups which has emitted light and light-receiving timing of the light receiver when the light receiver receives light reflected by the object, the processor being configured to adjust the emission light volume based on the distance information to the object.
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Abstract
An object detector includes a projector including a light source having a two-dimensionally arranged plurality of light emitter groups, each of the light emitter groups having a plurality of light emitters, a light receiver which receives light emitted from the projector, and reflected by an object, and a light source driver which lights on and lights off each of the light emitter groups of the light source.
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Citations
18 Claims
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1. An object detector, comprising:
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a projector including a light source having a two-dimensionally arranged plurality of light emitter groups, each of the light emitter groups having a plurality of light emitters and configured to emit an adjustable emission light volume; a light receiver which receives light emitted from the projector and reflected by an object; a light source driver which illuminates and turns off each of the light emitter groups of the light source; and a processor which sequentially illuminates and turns off the plurality of light emitter groups using the light source driver, and obtains distance information to the object based on lighting-on timing of one of the light emitter groups which has emitted light and light-receiving timing of the light receiver when the light receiver receives light reflected by the object, the processor being configured to adjust the emission light volume based on the distance information to the object. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An object detector, comprising:
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a projector including a light source having a two-dimensionally arranged plurality of light emitter groups, each of the light emitter groups having a plurality of light emitters; a light receiver which receives light emitted from the projector, and reflected by an object; a light source driver which illuminates and turns off each of the light emitter groups of the light source; and a processor which sequentially illuminates and turns off the plurality of light emitter groups using the light source driver, and obtains distance information to the object based on lighting-on timing of the light emitter group and light-receiving timing of the light receiver when the light receiver receives light reflected by the object, the processor being configured to adjust a number of light emitters to be illuminated in one of the light emitter groups based on the distance information to the object. - View Dependent Claims (8, 9, 10, 11, 12, 14, 15, 16, 17, 18)
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13. An object detector, comprising:
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a projector including a light source having a two-dimensionally arranged plurality of light emitter groups, each of the light emitter groups having a plurality of light emitters; a light receiver which receives light emitted from the projector, and reflected by an object; a light source driver which illuminates and turns off each of the light emitter groups of the light source; and a processor which sequentially illuminates and turns off the plurality of light emitter groups with the light source driver, and obtains distance information to the object based on lighting-on timing of one of the light emitter groups which has emitted light and light-receiving timing of the light receiver when the light receiver receives light reflected by the object, the processor being configured to adjust the emission light volume based on the distance information to the object.
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Specification