Light detector and distance measuring device

A light detector comprising:

• a light receiver including a plurality of sensors arranged two-dimensionally on a substrate;
• and
• a controller configured to:
• set an overall light-receiving region in which the sensors are selectively turned on in the light receiver;
• and
• set a first light-receiving region of the overall light-receiving region and a second light-receiving region of the overall light-receiving region different from the first light-receiving region, based on coordinate information input from outside the light receiver,
• wherein the second light-receiving region is arranged to be further away from an optical axis of laser light received by the light receiver than the first light-receiving region,
• wherein the width of the second light-receiving region in a first direction in which the first light-receiving region and the second light-receiving region are adjacent to each other, is greater than the width of the first light-receiving region in the first direction, and
• wherein the width of a portion of the second light-receiving region in a second direction intersecting the first direction is narrower than the width of the first light-receiving region in the second direction, the portion of the second light-receiving region being turned on.

A distance measuring device comprising:

• a light emitter configured to emit an optical signal,
• a light receiver configured to receive reflected light of the optical signal emitted by the light emitter, the light receiver including a plurality of sensors and a plurality of pixels, the sensors arranged two-dimensionally on a substrate, and each of the plurality of pixels including at least one of the sensors;
• and
• a controller configured to:
• set an overall light-receiving region in which the sensors are selectively turned on in the light receiver;
• set a first light-receiving region of the overall light-receiving region and a second light-receiving region of the overall light-receiving region different from the first light-receiving region, based on coordinate information input from outside the light receiver, wherein the first light-receiving region includes first pixels included in the plurality of pixels, the second light-receiving region includes second pixels included in the plurality of pixels, and the second light-receiving region is arranged to be further away from an optical axis of the optical signal emitted by the light emitter than the first light-receiving region;
• turn on one or more of the first pixels and one or more of the second pixels during a first period;
• and
• turn off a second pixel of the one or more of the second pixels during a second period after the first period, in a state in which the one or more of the first pixels are on, wherein a density in the second light-receiving region of the one or more of the second pixels in an on-state is less than a density in the first light-receiving region of the one or more of the first pixels in an on-state.