Shizuki Electric Company, Inc.

Yasuo Nakajima

Masaichi Shikata

Disclosed are several embodiments of devices for improving the performance of optical fiber displays. A light-absorbing material is used to reduce reflected light and glare from the surface of an optical display that uses a diffusion sheet or sheets to increase the viewing angle of the display. A surface of each diffusion sheet is covered by the light-absorbing material except in those locations where there is an optical fiber or other light source. Further, the invention uses diamond and triangle shaped sheets to increase the tolerance in applying the diffusion sheets and reduce the non-uniformities such as air trapped between the sheets and the surface, partially covered optical fibers, overlapping diffusion sheets. A preferred embodiment also improves the performance of the optical fibers by coating them with a light-absorbing material to reduce crosstalk and interference between fibers and alternately by coating them with a reflective material which reduces both transmission losses and crosstalk between fibers. Further, fiber performance is improved using a by holding the ends of the fibers straight for a specified distance from each of their ends.

Growing community of inventors

Hyogo, Japan

Yasuo Nakajima