| 发明名称 | Image forming apparatus and density correction method | ||
| 摘要 | An image forming apparatus includes: an image forming section including a rotational member and configured to form an image on the long sheet; a density unevenness cycle acquiring section configured to acquire a cycle of a density profile that represents density variation in a sub scanning direction; a cycle control section configured to operate such that, in a case where a same image is continuously formed on the long sheet, a length of the image in the sub scanning direction is an integer multiple of a cycle length that corresponds to one cycle of the density profile; and a density correction section configured to form a patch image for correction that has a size greater than the cycle length of the density profile on the image bearing member, and perform density correction using correction data created based on a detection result regarding the patch image for correction. | ||
| 申请公布号 | US9432547(B2) | 申请公布日期 | 2016.08.30 |
| 申请号 | US201514950501 | 申请日期 | 2015.11.24 |
| 申请人 | KONICA MINOLTA, INC. | 发明人 | Furuta Tatsuya;Sakurai Shota;Saito Kazuhiro;Kawasaki Tomohiro;Ishizuka Kazuteru |
| 分类号 | G03G15/00;H04N1/04;H04N1/00;G06K15/14 | 主分类号 | G03G15/00 |
| 代理机构 | Lucas & Mercanti, LLP | 代理人 | Lucas & Mercanti, LLP |
| 主权项 | 1. An image forming apparatus comprising: a sheet conveyance section capable of conveying a long sheet; an image forming section including a rotational member and configured to form an image on the long sheet, the rotational member including a photoconductor and a developer bearing member; a density unevenness cycle acquiring section configured to acquire a cycle of a density profile that represents density variation in a sub scanning direction; a cycle control section configured to operate such that, in a case where a same image is continuously formed on the long sheet, a length of the image in the sub scanning direction is an integer multiple of a cycle length that corresponds to one cycle of the density profile; an image density detection section configured to detect a density of an image formed by the image forming section on an image bearing member; and a density correction section configured to form a patch image for correction that has a size greater than the cycle length of the density profile on the image bearing member, and, based on a detection result regarding the patch image for correction that is obtained by the image density detection section, create correction data to perform density correction using the correction data. | ||
| 地址 | Tokyo JP | ||