发明名称 |
Light sensor and electronic device |
摘要 |
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. |
申请公布号 |
US9562922(B2) |
申请公布日期 |
2017.02.07 |
申请号 |
US201314762120 |
申请日期 |
2013.11.08 |
申请人 |
SHARP KABUSHIKI KAISHA |
发明人 |
Kimura Tadamasa;Shimizu Takayuki |
分类号 |
G01P3/36;G01S17/50;G01V8/20;G01P13/00;G01S17/58;G06F3/01;G01V8/12 |
主分类号 |
G01P3/36 |
代理机构 |
Birch, Stewart, Kolasch & Birch, LLP |
代理人 |
Birch, Stewart, Kolasch & Birch, LLP |
主权项 |
1. 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. |
地址 |
Osaka JP |