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:
Jun. 05, 2012
Filed:
Oct. 21, 2008
Daisuke Yamashita, Shizuoka, JP;
Takeshi Watanabe, Kanagawa, JP;
Daisuke Yamashita, Shizuoka, JP;
Takeshi Watanabe, Kanagawa, JP;
Kabuhsiki Kaisha Toshiba, Tokyo, JP;
Toshiba Tec Kabuhsiki Kaisha, Tokyo, JP;
Abstract
A reading section outputs density information of a gradation pattern image of a recording member. A gradation correction characteristic generation section generates a first gradation correction characteristic f(x). At first image quality adjustment, a detection section detects densities of patch pattern images on an image carrier, and the gradation correction characteristic generation section generates a second gradation correction characteristic g(x). At normal image quality adjustment, the detection section detects densities of patch pattern images on the image carrier, and the gradation correction characteristic generation section generates a second gradation correction characteristic g'(x). A calculation section calculates a difference gradation correction characteristic g″(x) between the gradation correction characteristic g(x) and the second gradation correction characteristic g′(x). An image quality maintaining control section multiplies the difference gradation correction characteristic g″(x) by the first gradation correction characteristic f(x), and adjusts an image quality of an image formed on the recording member.