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:
Jun. 19, 2001
Filed:
Jul. 28, 1999
Applicant:
Inventors:
Koichi Isono, Kyoto, JP;
Takahiro Matsuo, Kyoto, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B41J 2/447 ; B41J 2/47 ; G06K 1/510 ;
U.S. Cl.
CPC ...
B41J 2/447 ; B41J 2/47 ; G06K 1/510 ;
Abstract
In a multi-beam drawing method in which drawing is performed with a plurality of light-emitting devices (LDs), it is detected whether any LD is damaged. Of a plurality of partial LD lines obtained by partitioning at a damaged LD or LDs, the partial LD line including the largest number of LDs is selected as an effective LD line for use in drawing. Spiral correction is performed by dividing image data to be supplied to the LDs into a plurality of virtual small images parallel to the sub-scanning direction which are shifted in a reverse direction to the sub-scanning direction.