Invention Grant
- Patent Title: Position detecting device, liquid ejecting apparatus and method of detecting smear of scale
-
Application No.: US12776850Application Date: 2010-05-10
-
Publication No.: US08128189B2Publication Date: 2012-03-06
- 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
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
- US08029089B2 Position detecting device, liquid ejecting apparatus and method of detecting smear of scale Public/Granted day:2011-10-04
Information query
IPC分类:
