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:
Apr. 20, 1999
Filed:
Apr. 18, 1997
Nobuo Katsuma, Saitama, JP;
Hisashi Enomoto, Saitama, JP;
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Abstract
A thermal printer using a thermal head having a plurality of heating elements arranged in line, wherein the heating elements are driven for different power conduction times to record dots at different densities. According to the invention, the thermal printer is comprised of a first look-up table for converting original heating data into time data representative of a power conduction time corresponding to the original heating data; a correction circuit for correcting the time data to obtain a corrected power conduction time; a second look-up table for converting the corrected power conduction time into corrected heating data which corresponds to the corrected power conduction time; and a head driver for driving the heating elements in accordance with the corrected heating data.