Patent Number: 6,166,749

Title: Optical scanning system for printer

Abstract: An optical scanning system of a printer, which includes: a plurality of optical scanning units which scan line in parallel onto a circulating photoreceptor belt; a plurality of photodetector for detecting light emitted from each optical scanning unit, to output pulse signals according to the detection; a mark sensor for detecting the pass of a mark formed in the photoreceptor belt at a set position, and for outputting a reference path detection signal according to the detection of the mark; a page synchronization signal generation unit for counting the number of pulse signals output from one selectedphotodetector in synchronism with the reference path detection signal input thereto, and for generating page synchronization signals for each optical scanning unit whenever the count value reaches a page synchronization target value for each optical scanning unit, the page synchronization target values have been set according to a point in time at which each page area set in the photoreceptor belt reaches the scanning position of each optical scanning unit; and an optical scanning control unit for controlling each optical scanning unit to scan image information using the page synchronization signals. The optical scanning system can continuously generate page sync signals until a page area set in the photoreceptor belt passes through the scanning area of each optical scanning unit, using pulse signals output from a selected photodetector, thereby suppressing occurrence of an error in writing image information.

Inventors: Lee; Beom-ro (Seoul, KR)

Assignee: SamSung Electronics Co., Ltd.

International Classification: H04N 1/047 (20060101); H04N 1/50 (20060101); H04N 1/113 (20060101); H04N 1/12 (20060101); B41J 002/385 (); G01D 015/06 (); G03G 015/01 ()

Expiration Date: 12/26/2017