公开(公告)号：US20180034987A1

公开(公告)日：2018-02-01

申请号：US15661987

申请日：2017-07-27

Applicant: CANON KABUSHIKI KAISHA

Inventor： Tsuyoshi Yamauchi

IPC: H04N1/00 ,  H04N1/10

CPC classification number: H04N1/00549 ,  H04N1/00525 ,  H04N1/04 ,  H04N1/10 ,  H04N1/1026 ,  H04N1/107 ,  H04N2201/0081

Abstract: An image reading apparatus includes a sensor unit configured to move, a first driven pulley and a second driven pulley disposed apart from each other in a movement direction of the sensor unit, a drive pulley and a third driven pulley disposed between the first driven pulley and the second driven pulley in the movement direction, and a belt wound around the first driven pulley, the second driven pulley, the drive pulley, and the third driven pulley. The belt is bent at positions where each of the first driven pulley, the second driven pulley, and the drive pulley contacts an inner surface of the belt and is bent at a position where the third driven pulley contacts an outer surface of the belt.

公开(公告)号：US20180020117A1

公开(公告)日：2018-01-18

申请号：US15644892

申请日：2017-07-10

Applicant: CANON KABUSHIKI KAISHA

Inventor： Yoshiaki Watanabe ,  Tsuyoshi Yamauchi ,  Shigeru Kawasaki

IPC: H04N1/401 ,  H04N1/193 ,  H04N1/00 ,  H04N1/10

CPC classification number: H04N1/401 ,  H04N1/00551 ,  H04N1/10 ,  H04N1/1061 ,  H04N1/193 ,  H04N2201/0081

Abstract: First reference data acquired by reading a first white reference member placed in a read area of a document platen by a line sensor having a plurality of light receiving elements is stored in a storage unit. Second reference data acquired by reading a second white reference member by a capturing unit is compared with the first reference data stored in the storage unit. Output values from the plurality of light receiving elements are subjected to shading correction based on the comparison result.

公开(公告)号：US10419639B2

公开(公告)日：2019-09-17

申请号：US15644892

申请日：2017-07-10

Applicant: CANON KABUSHIKI KAISHA

Inventor： Yoshiaki Watanabe ,  Tsuyoshi Yamauchi ,  Shigeru Kawasaki

IPC: H04N1/40 ,  H04N1/401 ,  H04N1/00 ,  H04N1/10 ,  H04N1/193

Abstract: An image reading apparatus includes a line sensor to read an image of a document in a read area, a storage unit to store first reference data previously acquired by reading a first white reference member opposite to light receiving elements of the line sensor, a second white reference member of which a length is shorter than a length of the line sensor in the main scanning direction, an acquiring unit to acquire reference data read by the line sensor with the second white reference member and the line sensor opposed to each other, a correction unit to correct an output of the light receiving elements not opposite to the second white reference member, based on the stored first reference data and second reference data acquired by the light receiving elements opposite to the second white reference member among the reference data acquired by the acquiring unit.

公开(公告)号：US10136009B2

公开(公告)日：2018-11-20

申请号：US15661987

申请日：2017-07-27

Applicant: CANON KABUSHIKI KAISHA

Inventor： Tsuyoshi Yamauchi

IPC: H04N1/04 ,  H04N1/00 ,  H04N1/10 ,  H04N1/107

Abstract: An image reading apparatus includes a sensor unit configured to move, a first driven pulley and a second driven pulley disposed apart from each other in a movement direction of the sensor unit, a drive pulley and a third driven pulley disposed between the first driven pulley and the second driven pulley in the movement direction, and a belt wound around the first driven pulley, the second driven pulley, the drive pulley, and the third driven pulley. The belt is bent at positions where each of the first driven pulley, the second driven pulley, and the drive pulley contacts an inner surface of the belt and is bent at a position where the third driven pulley contacts an outer surface of the belt.