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:
Aug. 09, 2005
Filed:
Apr. 25, 2002
Keiichi Okamura, Nagano, JP;
Keiichi Okamura, Nagano, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
When an image reader is in a stand-by state in which the image reader can read an original, supply of a clock signal from a clock generation circuit to a line sensor is halted. Hence, supply of a clock signal does not need power. As a result of supply of the clock signal to the line sensor being halted, there can be reduced generation of a dark current due to the head developing in the line sensor and generation of Electromagnetic Interference. Consequently, the noise in read image data is reduced, thereby improving the picture quality of a read image. In the stand-by state, supply of only a clock signal to the line sensor is halted. Hence, the time required for warming up the line sensor is nominal. Upon receipt of a reading instruction, the image reader can immediately start reading an original, thus improving operability of the image reader.