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US 2015/0316572 A1Published application
Light sensor and electronic device
AssigneeSharp Kabushiki Kaisha
InventorsTadamasa KIMURA, Takayuki SHIMIZU
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Abstract
A provision of a movement direction determination section for determining that a particular direction is a movement direction of the detection target object, in a case where a second comparator determines that larger than a predetermined threshold value is an absolute value of a ratio of (i) a difference between the photocurrent of the at least two light receiving elements to (ii) a sum of a photocurrent of at least two light receiving elements next to each other along the particular direction.
Claims5
An optical sensor, comprising:
- a plurality of light receiving elements each for generating a photocurrent in response to receipt of (i) reflected light resulting from a detection target object reflecting light having been emitted by a light emitting element to the detection target object or (ii) ambient light not having been blocked by the detection target object;
- a first comparison section for comparing, with a predetermined threshold value, an absolute value of a ratio of (i) a difference between the respective photocurrents of at least two of the plurality of light receiving elements which at least two light receiving elements are arranged in a particular direction to (ii) a sum of the respective photocurrents of the at least two light receiving elements;
- and
- a movement direction determination section for, in a case where the first comparison section has determined that the absolute value of the ratio is larger than the predetermined threshold value, determining that the particular direction is a direction in which the detection target object is moving.
1 more element
Dependencies are inferred from the claim text.