Seiko Epson Corporation

Kenji Higuchi

Yoshihiro Tatara

Hirokazu Yamano

Toshimitsu Ohara

Emi Akahane

Hironobu Tadenuma

A concave portion () constructed by a circular hole is formed at a guide member () positioning a original on aboard surface () of an original table () by joining a surrounding edge portion of the original table () and attaching to the original. Concave portion image data displaying shadow of the concave portion () by reading shadow of the concave portion () at a scanning portion is produced, and an origin of original image data corresponding to a reading origin () on the board surface () by a control portion is set to the scanning portion based on the concave portion image data.

Image reading apparatus and image input-output apparatus

Scanner

Concerning a lamp unit which is used as a light source of an image reading apparatus, there is provided a lamp unit which reduces a change over time in the quantity of light. The lamp unit is provided with a hollow cylindrical gas-filled tube in which a gas is filled; a pair of electrodes which are secured to an outer peripheral surface of the gas-filled tube and extend in the longitudinal direction of the gas-filled tube in a mutually opposing state; an electrically insulating cladding tube surrounding the electrodes and the gas-filled tube; and a heat-accumulating member provided in contact with an outer peripheral surface of the cladding tube and extending in the longitudinal direction of the cladding tube.

Lamp unit and image reading apparatus using the same

Growing community of inventors

Nagano, Japan

Kenji Higuchi