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:
Feb. 18, 1992
Filed:
May. 25, 1990
Taichi Ito, Hirakata, JP;
Masato Tsukuda, Moriguchi, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A thermal recording apparatus having a thermal head including a plurality of heating element groups each of which consists of a plurality of heating elements driven simultaneously and arranged in a row is so improved that it can record images without forming printing gaps. The apparatus has a driving unit for producing driving signals indicative of tones of the image data of pixels to drive the heating elements. The pixels correspond to the heating elements, respectively. The period of time of driving the heating elements is varied in accordance with the tones. The driving unit comprises a modification circuit for modifying the period of time of driving at least one of the heating elements which is disposed at each of both ends of each of the heating element groups.