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. 17, 2012
Filed:
Oct. 06, 2009
Takayuki Nomura, Chiba, JP;
Takayuki Nomura, Chiba, JP;
Seiko Instruments Inc., , JP;
Abstract
To provide a thermal printer apparatus and a printing method that can be adapted to different types of thermal paper having different thermal conductivity characteristics, a dot data memorystores dot data for each line in synchronization with line sequential printing and delivers an energizing pulse selectively to a line thermal headvia a driving circuit. A multipliercounts the number of dots to be printed for each line and multiplies a result of the counting by a heated thermal paper coefficient Pcorresponding to a thermal conductivity characteristic of a thermal paper. A heat accumulation countercounts results of the multiplying in an accumulative manner. A multipliermultiplies a count value in the heat accumulation counterby a heat radiation coefficient and a heat radiation thermal paper coefficient Pcorresponding to the thermal conductivity characteristic of the thermal paperrepeatedly at a predetermined period, so as to correct and update the count value in the heat accumulation counter. An arithmetic unitcalculates an energizing pulse width based on the corrected and updated count value in the heat accumulation counterin synchronization with line sequential printing, and controls the driving circuitbased on a result of the calculating.