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:
May. 01, 2001
Filed:
Mar. 30, 1999
Applicant:
Inventors:
Hiroshi Kobayashi, Iwate-ken, JP;
Hiroyoshi Zama, Iwate-ken, JP;
Hiromitsu Takahashi, Iwate-ken, JP;
Assignee:
Alps Electric Co., Ltd., , JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B41J 2/355 ;
U.S. Cl.
CPC ...
B41J 2/355 ;
Abstract
In an image forming method in which a dither matrix comprised of a plurality of dots are used to record one pixel and an image having multistage gradations is recorded by changing the diameter of this dot, a threshold value of a dither matrix in one pixel is arranged such that each dot is sequentially plotted in the scanning direction of a thermal head. Further, in response to gradations, an image is recorded without using a dither matrix of a threshold value in which an energization time of a thermal head becomes discontinuous.