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:
Sep. 10, 2013
Filed:
Sep. 14, 2010
Hiroshi Adachi, Kanagawa, JP;
Eiji Nemoto, Tokyo, JP;
Takuma Kasai, Kanagawa, JP;
Kiriko Chosokabe, Tokyo, JP;
Norikazu Okada, Kanagawa, JP;
Hiroshi Adachi, Kanagawa, JP;
Eiji Nemoto, Tokyo, JP;
Takuma Kasai, Kanagawa, JP;
Kiriko Chosokabe, Tokyo, JP;
Norikazu Okada, Kanagawa, JP;
Ricoh Company, Limited, Tokyo, JP;
Abstract
A heater control device includes a temperature detector that detects a temperature of a heated object heated by a heater; an alternating-current power supply for applying an alternating current voltage to the heater; a turn-on ratio decision unit that determines a turn-on ratio of the heater based on the temperature and a target temperature; a turn-on pattern decision unit that determines a partial turn-on pattern, as the turn-on pattern of the heater, which is a pattern of a turn-on ratio higher than the determined turn-on ratio in terms of a control-period, and to which a partial turn-on instead of a full turn-on is allocated on a half-wavelength basis of the alternating current voltage within the control period based on the turn-on ratio of the heater; and a turn-on controller that controls turn-on of the heater based on the determined turn-on pattern.