公开(公告)号：US10908524B2

公开(公告)日：2021-02-02

申请号：US16664188

申请日：2019-10-25

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, LP.

Inventor： Youn-jae Kim ,  Ki-youn Lee

IPC: B41J2/385 ,  G03G15/01 ,  G03G15/00

Abstract: An image forming apparatus includes a plurality of photosensitive drums respectively corresponding to a plurality of colors to print, on a recording medium, color chart of a plurality of vertical lines in a sub-scanning direction to a main scanning direction of the recording medium and to be arranged at intervals along the main scanning direction. A vertical line of the plurality of vertical lines includes at least two colored sub-lines to be formed by corresponding at least two photosensitive drums. A processor is to perform a correction in non-linear color registrations in the main scanning direction using an image of the color chart.

公开(公告)号：US20200057400A1

公开(公告)日：2020-02-20

申请号：US16664188

申请日：2019-10-25

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, LP.

Inventor： Youn-jae Kim ,  Ki-youn Lee

IPC: G03G15/01 ,  G03G15/00

Abstract: An image forming apparatus includes a plurality of photosensitive drums respectively corresponding to a plurality of colors to print, on a recording medium, color chart of a plurality of vertical lines in a sub-scanning direction to a main scanning direction of the recording medium and to be arranged at intervals along the main scanning direction. A vertical line of the plurality of vertical lines includes at least two colored sub-lines to be formed by corresponding at least two photosensitive drums. A processor is to perform a correction in non-linear color registrations in the main scanning direction using an image of the color chart.