By a News Reporter-Staff News Editor at Journal of Engineering -- According to news reporting originating from Alexandria, Virginia, by VerticalNews journalists, a patent by the inventor Nakazawa, Masamoto (Kanagawa, JP), filed on December 30, 2013, was published online on November 22, 2016.
The assignee for this patent, patent number 9503664, is RICOH COMPANY, LTD. (Tokyo, JP).
Reporters obtained the following quote from the background information supplied by the inventors: "The present invention relates to a photoelectric conversion element, an image reading device, and an image forming apparatus.
"Image reading devices that read a document, for example, perform photoelectric conversion on light reflected from the document, convert analog signals representing images into digital signals, and correct and transfer the image data. Some conventional image reading devices use a spread spectrum clock generation unit to drive the device in order to solve the problem of EMI (unnecessary radiation). However, using spread spectrum clocks for a CCD or CMOS sensor may cause periodic noise due to spread spectrum.
"In order to prevent periodic noise due to spread spectrum, for example, Japanese Laid-open Patent Publication No. 2001-94734 discloses an image reading device in which a timing circuit is separated into an analog clock generation circuit and a digital clock generation circuit, with the analog clock generation circuit using a reference clock from a reference clock oscillator and the digital clock generation circuit using a spread spectrum clock from an SSG.
"However, when processing speed is increased, reduction of noise due to unnecessary radiation or the like may become insufficient.
"In view of the above, there is a need to provide a photoelectric conversion element, an image reading device, and an image forming apparatus that can reduce noise due to unnecessary radiation or the like."
In addition to obtaining background information on this patent, VerticalNews editors also obtained the inventor's summary information for this patent: "It is an object of the present invention to at least partially solve the problems in the conventional technology.
"A photoelectric conversion element includes: a plurality of AD conversion units that convert respective analog signals representing amounts of charge stored in a plurality of light receiving elements into digital signals in parallel; and a parallel-serial conversion unit that performs parallel-serial conversion on the digital signals into which the analog signals have been converted in parallel by the AD conversion units.
"An image reading device includes a photoelectric conversion element as described above.
"An image forming apparatus includes: an image reading device as described above; and an image forming unit that forms an image from an image that is read by the image reading device.
"The above and other objects, features, advantages and technical and industrial significance of this invention will be better understood by reading the following detailed description of presently preferred embodiments of the invention, when considered in connection with the accompanying drawings."
For more information, see this patent: Nakazawa, Masamoto. Photoelectric Conversion Element, Image Reading Device, and Image Forming Apparatus. U.S. Patent Number 9503664, filed December 30, 2013, and published online on November 22, 2016. Patent URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=9503664.PN.&OS=PN/9503664RS=PN/9503664
Keywords for this news article include: RICOH COMPANY LTD.
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