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. 26, 2015
Filed:
May. 12, 2014
Hideo Muroi, Kanagawa, JP;
Hideo Muroi, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An image forming apparatus includes an image carrier, an image forming unit to form a multi-gradation image on the image carrier, a density detector to detect density of the multi-gradation image, a gradation characteristic data generator to generate gradation characteristic data, and a gradation corrector to correct image data of the multi-gradation image. The gradation characteristic data generator forms a gradation correction pattern on the image carrier via the image forming unit. The gradation correction pattern is a continuous gradation pattern including a first pattern having gradation levels from a maximum gradation level to a minimum gradation level and a second pattern having gradation levels from the minimum gradation level to the maximum gradation level. The gradation characteristic data generator continuously detects image density of the gradation correction pattern and background areas next to the gradation correction pattern via the density detector to generate the gradation characteristic data.