- 专利标题： Position detection device, optical device, light source device, and projector
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申请号： US15407608申请日： 2017-01-17
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公开(公告)号： US09933695B2公开(公告)日： 2018-04-03
- 发明人: Hirofumi Okubo , Kazunori Maeta , Akira Nemura
- 申请人： Seiko Epson Corporation
- 申请人地址： JP Tokyo
- 专利权人： Seiko Epson Corporation
- 当前专利权人： Seiko Epson Corporation
- 当前专利权人地址： JP Tokyo
- 代理机构： ALG Intellectual Property, LLC
- 优先权： JP2016-007666 20160119; JP2016-007667 20160119
- 主分类号： G03B21/14
- IPC分类号： G03B21/14 ; G01B11/00 ; G03B21/20 ; G02B26/06 ; H04N9/31 ; G01B11/26 ; G01B11/27 ; G02B7/00 ; G02B27/28
摘要：
A position detection device includes: a sensor that includes a light emission unit and a light reception unit receiving light emitted from the light emission unit; a driving unit; a gear (transmission gear) that is disposed at a position facing the sensor and is rotated by power from the driving unit; and a control unit that drives the driving unit based on an amount of light received by the light reception unit and detected by the sensor.
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