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:
Nov. 12, 1991
Filed:
Mar. 22, 1990
Michio Tsuchiya, Nagoya, JP;
Masaaki Terazawa, Ichinomiya, JP;
Abstract
Disclosed herein is a thermal recording apparatus used, in facsimile machines, printers, etc., comprising a thermal head, a driving circuit and a temperature compensation circuit. The head has heating resistors which, driven by the driving circuit, generate heat by which to thermally record images, characters and other information on a recording medium. The temperature compensation circuit, detecting thermal head temperatures, has a charging-discharging circuit whose output charging-discharging signal varies with the temperature detected. The compensation circuit also comprises a reference signal generation circuit and an output circuit, the reference signal generation circuit outputs a reference signal to the output circuit based on information by which to control the head temperature suitably under various internal and external conditions affecting the head temperature inside and apparatus. The output circuit acquires information on actual head temperatures from the charging-discharging signal. The circuit obtains information from the reference signal on the status of the apparatus and any external factors affecting it. Based on these types of information, the output circuit outputs a temperature compensation signal. The driving circuit drives the heating resistors according to the compensation signal.