Printer that performs shading correction and method for operating the same

    公开(公告)号:US09981495B2

    公开(公告)日:2018-05-29

    申请号:US15389287

    申请日:2016-12-22

    Inventor: Kengo Saga

    Abstract: A printer includes a discharge unit, a first printing unit disposed along a sheet conveying path extending from the discharge unit and configured to print an image on a first sheet while the first sheet is conveyed from the discharge unit to the first printing unit and then to the discharge unit, a second printing unit disposed farther from the discharge unit than the first printing unit along the sheet conveyance path and configured to print an image on a second sheet while the second sheet is conveyed towards the discharge unit therethrough, a scanning unit disposed along the sheet conveying path between the discharge unit and the first printing unit, and configured to scan a surface of the first sheet, and a control unit configured to perform a shading correction of the scanning unit using the second sheet as a white reference.

    IMAGE FORMING SYSTEM WITH EXTERNAL APPARATUS, IMAGE FORMING APPARATUS AND PROJECTOR

    公开(公告)号:US20180146118A1

    公开(公告)日:2018-05-24

    申请号:US15820078

    申请日:2017-11-21

    Inventor: Keita MIYAMOTO

    Abstract: Provided is an image forming system that simply and securely protects printed matter that is not so important, but that the user does not wish others to view. An external apparatus receives a simple-security setting for image data for which there is a printing instruction, includes the simple-security setting in the printing instruction, and transmits the printing instruction to an image forming apparatus. The image forming apparatus, when a simple-security setting is included, adds a mark image to the image data for which there is a printing instruction, and prints the image data. A projector, by an imaging unit, captures an image of the discharge tray, and when a mark image is detected, generates a projection image on which a security image is arranged, and projects the projection image toward the discharge tray.

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