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:
May. 15, 2012
Filed:
Jul. 01, 2011
Young-min Chae, Suwon-si, KR;
Sang-yong Han, Suwon-si, KR;
Joong-gi Kwon, Gunpo-si, KR;
Se-joong Kim, Seoul, KR;
Jun-seok Cho, Gwangmyeong-si, KR;
Young-min Chae, Suwon-si, KR;
Sang-yong Han, Suwon-si, KR;
Joong-gi Kwon, Gunpo-si, KR;
Se-joong Kim, Seoul, KR;
Jun-seok Cho, Gwangmyeong-si, KR;
Samsung Electronics Co., Ltd., Suwon-Si, KR;
Abstract
An image forming apparatus includes a power supply unit that controls a level of electrical power supplied to the heating lamp during a warm-up of the heating unit that involves at least a first warm-up stage. During the first warm-up stage, when power begins to be supplied to the heating lamp, the power supply unit gradually increases a level of power supplied to the heating lamp from zero to a defined supply level according to a phase control of an alternating current (AC) of the source power. If a second warm-up stage is included, during the second warm-up stage, the power supply unit may maintain the level of power supplied to the heating lamp at the defined supply level until the measured surface temperature of the heating unit has reached a defined target temperature.