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. 03, 2004
Filed:
Jul. 24, 2002
Woo-jung Shim, Gyeonggi-do, KR;
Seung-deog An, Gyeonggi-do, KR;
Samsung Electronics Co., Ltd., Suwon, KR;
Abstract
A method of compensating for image quality controls a toner reproduction curve (TRC). The toner reproduction curve TRC &PHgr;(k) measured by a color toner density sensor is compared with a target TRC &PHgr; to obtain a deviation &Dgr;&PHgr;. A variation &Dgr;V of a developer bias V is calculated from a Jacobian matrix (J ) of a measured developer bias V to calculate a new developer bias V and determining a measured grid voltage V as a new grid voltage V if the deviation (&Dgr;&PHgr;) is greater than a tolerance &Dgr;&PHgr; . A backplating vector V is obtained from the grid voltage V and the developer bias V . The backplating vector V is compared with a critical value V to set control parameters V and V and control the TRC &PHgr;. Thus, noise effects on the image quality are minimized to provide an output image closest to an input image quality so as to improve the image quality.