US 12,328,420 B2
Document reading device and image forming apparatus
Miho Morita, Kanagawa (JP); Naoyuki Kato, Kanagawa (JP); Kenji Yamada, Kanagawa (JP); Satoshi Noda, Kanagawa (JP); Kenichi Ishikura, Kanagawa (JP); Takahiro Iizuka, Kanagawa (JP); Hiroyuki Tanaka, Kanagawa (JP); Shinya Hasegawa, Kanagawa (JP); Kota Tomioka, Kanagawa (JP); Yoichi Yamakawa, Kanagawa (JP); Tomonori Sato, Kanagawa (JP); Ryusuke Nakata, Kanagawa (JP); Kazuyuki Koda, Kanagawa (JP); Isamu Adachi, Kanagawa (JP); Tomomi Ishida, Kanagawa (JP); Shinnosuke Kondo, Kanagawa (JP); Yuya Shiokawa, Kanagawa (JP); Daisuke Ishihara, Kanagawa (JP); Kohei Tachibana, Kanagawa (JP); Shinichi Ohba, Kanagawa (JP); and Taisuke Endo, Kanagawa (JP)
Assigned to FUJIFILM Business Innovation Corp., Tokyo (JP)
Filed by FUJIFILM Business Innovation Corp., Tokyo (JP)
Filed on Apr. 5, 2022, as Appl. No. 17/714,110.
Claims priority of application No. 2021-135289 (JP), filed on Aug. 23, 2021; application No. 2021-135290 (JP), filed on Aug. 23, 2021; application No. 2021-135424 (JP), filed on Aug. 23, 2021; application No. 2021-135483 (JP), filed on Aug. 23, 2021; application No. 2021-135487 (JP), filed on Aug. 23, 2021; application No. 2021-135489 (JP), filed on Aug. 23, 2021; application No. 2021-135490 (JP), filed on Aug. 23, 2021; application No. 2021-135491 (JP), filed on Aug. 23, 2021; and application No. 2022-003292 (JP), filed on Jan. 12, 2022.
Prior Publication US 2023/0058921 A1, Feb. 23, 2023
Int. Cl. H04N 1/193 (2006.01); H04N 1/00 (2006.01); H04N 1/04 (2006.01); H04N 1/06 (2006.01); H04N 1/08 (2006.01)
CPC H04N 1/00748 (2013.01) [H04N 1/00753 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A document reading device comprising:
an imaging unit that images a document;
a placing portion that includes a first placing portion and a second placing portion and that has a placing surface on which the document is placed, the placing surface being formed by the first placing portion and the second placing portion; and
a detector that detects an edge of the document that is placed on the placing surface by using a color difference or a luminance difference between the placing surface and the document,
wherein an end portion of the first placing portion adjacent to the second placing portion extends toward the second placing portion beyond an end portion of the second placing portion adjacent to the first placing portion,
wherein a color difference or a luminance difference between an overlapping portion at which the first placing portion and the second placing portion overlap in a vertical direction and the placing portion is smaller than a color difference or a luminance difference between the placing portion and the document.
 
15. A document reading device comprising: an imaging unit that images a document; a placing portion that includes a first placing portion and a second placing portion and that has a placing surface on which the document is placed, the placing surface being formed by the first placing portion and the second placing portion, wherein an end portion of the first placing portion adjacent to the second placing portion extends toward the second placing portion beyond an end portion of the second placing portion adjacent to the first placing portion; a detector that detects an edge of the document that is placed on the placing surface by using a color difference or a luminance difference between the placing surface and the document; a loading portion that is disposed below the placing surface and that enables a plurality of the documents to be loaded thereon; and a reading member that reads a document that is placed on the loading portion while transporting the document, wherein the reading member transports the document that is placed on the loading portion via an opening that is adjacent to the loading portion in a direction that intersects a vertical direction, and wherein the first placing portion is a covering that covers an upper surface of the reading member.