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:
Jul. 03, 2007
Filed:
Nov. 01, 2002
Hiroki Tezuka, Kanagawa, JP;
Yoichiro Maebashi, Tokyo, JP;
Hiroki Tezuka, Kanagawa, JP;
Yoichiro Maebashi, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
Provided are a method of making correction for color sensor output values in color image forming apparatus, which succeeds in improving color reproducibility of the color image forming apparatus, and the color image forming apparatus provided with the method. For this purpose, the apparatus and method according to the present invention make correction for deviation due to a color detecting device, of a color sensor output value Sin detection of a fixed patch; set a boundary turning point D between an ignorable region of toner bearing amounts where the influence of a color of a transferring material is ignorable on chromaticity of the patch and an unignorable region of toner bearing amounts where the influence is unignorable; make further correction for a corrected value S'after the correction for the deviation due to the color detecting device, using different methods for the unignorable region and the ignorable region, thereby to eliminate the influence of the color of the transferring material on the chromaticity of the patch.