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:
Oct. 20, 2015
Filed:
Dec. 22, 2009
Kouji Okada, Tokyo, JP;
Tetsuichiro Yamamoto, Tokyo, JP;
Hiroshi Hoshimiya, Tokyo, JP;
NEC Engineering, Ltd., Tokyo, JP;
Abstract
The present invention provides an image reader apparatus capable of obtaining an image having stable brightness while suppressing an increase of the cost of the apparatus. The image reader apparatusfor reading an image on a documentbeing fed and outputting an image signal includes a synchronization signal generation circuitfor generating a synchronization signal SS synchronous with a feed timing and a feed cycle of the document, a CCDfor reading an image on the documentin synchronism with the synchronization signal SS, an LEDfor emitting white light, and a lighting control circuitfor turning the LEDon in synchronism with the synchronization signal SS and turning the light source off so that a lighting period is equalized for each line irrespective of a variation of the feed cycle of the documentThe lighting control circuitturns the LEDoff so that the lighting period of the LEDis equal to a predetermined preset period.