Dai Nippon Printing Co., Ltd.

Takeshi Ogawa

Hiroshi Sekiguchi

Nobuhiko Ichikawa

Kazunobu Ogawa

Tetsuya Sadahiro

Kenji Ohki

Jun Horikoshi

Akihide Sano

There is provided a screen that, as a screen suitable for an interactive board, can output video image light incident obliquely from the back surface side to a viewer side to display a reflection-free image and, at the same time, can realize easy handwriting on the screen surface on the viewer side. To this end, a transmission screen for an interactive board is provided that comprises at least a Fresnel lens sheet comprising a prism part on its incident light side, a light diffusing member provided on the Fresnel lens on its surface side remote from the prism part, and a hard coat layer provided on the outgoing light side of the light diffusing member.

Transmission screen for interactive board

A reflecting screencomprises a base portion, light transmitting portionsprovided on the base portion, and light absorbing portions. Each of the light transmitting portionscomprises a unit prism shapewhich has a generally wedge-like shape with a larger width on the image source side than its width on the rear face side and is arranged along a screen face. A reflecting layeradapted to reflect the image light, which has been transmitted through the unit prism shapes, is provided on the rear face side of each unit prism shape. Each unit prism shapeextends linearly, and each light absorbing portionis arranged between each adjacent pair of the unit prism shapes

Reflecting screen, method of manufacturing the same, and reflection-type projection system

Growing community of inventors

Fukuyama, Japan

Takeshi Ogawa