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:
Jan. 06, 1998
Filed:
Feb. 13, 1995
Applicant:
Inventors:
Takayuki Okada, Tokyo, JP;
Mitsuo Tashiro, Tokyo, JP;
Assignee:
Seiko Precision Inc., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B41J / ; B41J / ;
U.S. Cl.
CPC ...
347185 ; 347186 ; 347189 ; 347194 ; 347211 ;
Abstract
In a driving method of a thermal printer, in which method heating elements are driven by strobe pulses consisting of preheat pulses and subsequent drive pulses that depend on a gradation level, the preheat pulse width and the frequency of basic clock pulses that are used to generate the strobe pulses are switched linearly with the temperature of a thermal head unit. In particular, based on data of preheat pulse widths and basic clock pulse frequencies for respective experimental head temperatures, preheat pulse widths and basic clock pulse frequencies for the other temperatures are calculated.