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:
Mar. 21, 1989
Filed:
Jan. 16, 1987
Atsuhiro Doi, Kaisei, JP;
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Abstract
The relation between an input energy at a thermal head and recording density in a thermographical recording system varies inconveniently by the ambient temperature or the head temperature, and moreover, the slope of the relation varies by the temperatures. Therefore, even if the input energy at the thermal head alone is precisely and minutely controlled, it is heretofore difficult to obtain the desired recording density if the temperature fluctuates. Even if the temperature at the thermal head is detected by a temperature sensor, and compensation is made based on the detected temperature, it is still difficult to achieve recording of high quality because there inevitably arise a time lag between the detected temperature and the real temperature of a heating resistor which is recording images. This invention method enables high quality recording by estimating a real temperature at the heating resistor out of detected temperatures obtained with a temperature sensor and compensating the temperature based upon the estimated temperature.