Panasonic Corporation

Kohei Suyama

Takafumi Sanada

Yuuzou Kawano

Hirofumi Enomoto

Nobuo Jikuya

Yoshihiro Teshima

The present invention provides an image display apparatus that inhibits deterioration of image quality caused by an increase in temperature of a laser light source apparatus. The image display apparatus of the present invention has a green color laser light source apparatus, a red color laser light source apparatus, a blue color laser light source apparatus, and a projection mouth in a first case. The first case has a fin on a side surface opposite to a projection mouth of the first case. The fin is provided in an air passage, the fin dissipating heat generated from laser light source apparatuses of each color and transferred via the first case.

Image display apparatus having heat dissipater

Top surfaces and inclined surfaces of prisms on a side opposite to a light source are formed such that, in a region on a light source side, light traveling in a light guide body toward the side opposite to the light source is sequentially reflected by the top surfaces and the inclined surfaces of the side opposite to the light surface of the prisms and approaches a direction orthogonal to the longitudinal direction of the light guide body. The height of the prisms can be the lowest in the longitudinally central portion of the light guide body, and gradually increases toward the light source side and the side opposite to the light source, from the central portion.

Light guide body, and lighting apparatus and document scanning apparatus having the same

A document scanning device includes a pair of light guides that extend in a main scanning direction of a document and illuminate the document, and a reference plate that is positioned closer to the light guides than the document. Each of the light guides has a first area that illuminates the document and a second area that illuminates the reference plate. Each light guide illuminates the reference plate over a wider area between the light guides in the second area than each light guide illuminates the document in the first area. Therefore, the center of the reference plate is illuminated and a sufficient amount of light is reflected on the reference plate.

Growing community of inventors

Fukuoka, Japan

Kohei Suyama