Invention Grant
- Patent Title: Position detecting device, liquid ejecting apparatus and method of detecting smear of scale
- Patent Title (中): 位置检测装置，液体喷射装置和检测污垢的方法
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Application No.: US13251875Application Date: 2011-10-03
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Publication No.: US08425003B2Publication Date: 2013-04-23
- Inventor: Satoshi Nakata , Hitoshi Igarashi
- Applicant: Satoshi Nakata , Hitoshi Igarashi
- Applicant Address: JP Tokyo
- Assignee: Seiko Epson Corporation
- Current Assignee: Seiko Epson Corporation
- Current Assignee Address: JP Tokyo
- Agency: Nutter McClennen & Fish LLP
- Agent John J. Penny, Jr.; Christina M. Sperry
- Priority: JP2005-277274 20050926; JP2005-277275 20050926; JP2005-281514 20050928; JP2005-295966 20051011
- Main IPC: B41J29/393
- IPC: B41J29/393 ; B41J23/00
Abstract:
A position detecting device for detecting a position of an object, includes a light emitting portion that emits light, a light receiving portion that receives the light from the light emitting portion, and a scale that is arranged between the light emitting portion and the light receiving portion, and includes a position detecting pattern and a smear detecting pattern. The position detecting pattern has a first light transmitting portion for transmitting the light from the light emitting portion and a first light interception portion for intercepting the light from the light emitting portion which are alternately arranged in a detection range of the object. The smear detecting pattern for detecting smear of the scale has a second light transmitting portion for transmitting the light from the light emitting portion and a second light interception portion for intercepting the light from the light emitting portion which are alternately arranged.
Public/Granted literature
- US20120019837A1 POSITION DETECTING DEVICE, LIQUID EJECTING APPARATUS AND METHOD OF DETECTING SMEAR OF SCALE Public/Granted day:2012-01-26
Information query
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