The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 30, 2008
Filed:
Nov. 16, 2006
Koji Niioka, Suwa, JP;
Koji Niioka, Suwa, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A liquid ejecting head is operable to eject liquid toward a target medium. A platen opposes to the liquid ejecting head, and has a first region formed with a plurality of projections. A first detector includes a light emitter operable to emit light toward the platen and a light receiver adapted to receive light reflected from the platen. The first detector is operable to generate a detection signal in accordance with an amount of the light received by the light receiver. A controller is operable to obtain the detection signal at a plurality of positions in the first region to determine a threshold value of the detection signal for detecting whether the target medium exists on the platen.