Invention Grant
- Patent Title: Position detection device, optical device, light source device, and projector
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Application No.: US15407608Application Date: 2017-01-17
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Publication No.: US09933695B2Publication Date: 2018-04-03
- Inventor: Hirofumi Okubo , Kazunori Maeta , Akira Nemura
- Applicant: Seiko Epson Corporation
- Applicant Address: JP Tokyo
- Assignee: Seiko Epson Corporation
- Current Assignee: Seiko Epson Corporation
- Current Assignee Address: JP Tokyo
- Agency: ALG Intellectual Property, LLC
- Priority: JP2016-007666 20160119; JP2016-007667 20160119
- Main IPC: G03B21/14
- IPC: G03B21/14 ; G01B11/00 ; G03B21/20 ; G02B26/06 ; H04N9/31 ; G01B11/26 ; G01B11/27 ; G02B7/00 ; G02B27/28
Abstract:
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.
Public/Granted literature
- US20170205699A1 POSITION DETECTION DEVICE, OPTICAL DEVICE, LIGHT SOURCE DEVICE, AND PROJECTOR Public/Granted day:2017-07-20
Information query
