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:
Jul. 16, 2002
Filed:
Dec. 06, 1999
Yasumasa Asaya, Ebina, JP;
Fuji Xerox Co., Ltd., Tokyo, JP;
Abstract
The positional deviation of each image along the vertical scanning direction is reduced when plural images are overlapped without introduction of significantly complex structure and control. One light beam out of 4 light beams is assigned as the reference light beam. The delay time of respective modulation start timings of other three light beams with respect to the modulation start timing of a reference light beam is divided by the scanning period of the light beam to calculate a quotient Q and a remainder R, and the fraction rounding process is applied to the remainder correspondingly to the number of light beams having the remainder R value exceeding so that rounding up of the remainder R or rounding down of the remainder R is selected to determine the modulation starting timing of each light beam based on the selection condition for selecting a fraction rounding process out of the rounding down of the remainder R (represented by “Qc, m, and y”) and the rounding up of the remainder R (represented by “Qc, m, y+1”).