Copal Company Limited

Katsuyuki Sukumoda

Yukio Yoshikawa

Tatsuya Okonogi

A plurality of sign display units are arranged adjacent to each other along at least one surface in order to form a convex or concave arc curved surface curved with a predetermined radius. In each sign display unit, light-emitting elements are arranged in a dot matrix so as to be able to display a kanji character, a high-quality alpha-numeric character close to a printing type, or an image, thus displaying desired sign information. The sign display unit provides good readability while its visual field angle is increased without degrading the display quality.

Growing community of inventors

Tokyo, Japan

Katsuyuki Sukumoda