Patent ID: 8020861

Claim:
A sheet conveyance device comprising: a sheet conveyance member which conveys a sheet; a guide member which guides the sheet conveyed by the sheet conveyance member; and sheet detection unit which detects the sheet guided by the guide member, wherein a sheet conveyance speed of the sheet conveyed by the sheet conveyance member is controlled based on information from the sheet detection unit, wherein the sheet detection unit is a sheet scanner having an optical sensor layer in which photoelectric conversion devices formed by combinations of organic transistors and organic photodiodes are continuously arranged in a matrix shape, and the sheet scanner is provided in the guide member in order to continuously detect the sheet conveyed by the sheet conveyance member, and wherein the sheet scanner is provided in the guide member located on a downstream of the sheet conveyance member in a sheet conveyance direction, and the sheet conveyance speed of the sheet conveyance member located on an upstream of the guide member is controlled based on information from the sheet scanner provided in the guide member.