Mitsubishi Denki Kabushiki Kaisha

Shuso Wadaka

Hiroshi Suzuki

Shinsuke Shikama

Kohei Teramoto

Kuniko Kojima

Takao Endo

Shigekazu Tsuda

An image display system includes a light valvefor providing image information to light converged by a converging lensand for emitting the light, a projective optical systemincluding a refractive optical lensfor projecting the light from the light valveand a convex mirrorfor reflecting the light from the refractive optical lensby using a reflecting surface thereof having negative power and for enlarging and projecting the reflected light, and a displayfor receiving the light from the projective optical systemby way of a receiving surfaceA, wherein the light valve is placed away from an optical axisof the projective optical systemand between a front surface of the displayand a rear surface of the projective optical system

Image display system

A transparent screen includes a refraction/total reflection plate in a form of a Fresnel lens, the refraction/total reflection plate having a sawtooth surface upon which light is incident and another surface via which the light exits, and an image formation/display plate for forming a projection image from the light that exits from the refraction/total reflection plate. Refraction slating surface portions each for refracting incident light towards the other surface of the refraction/total reflection plate, transmission slating surface portions each for making incident light pass therethrough, and total reflection slating surface portions each for reflecting incident light passing through one transmission slating surface portion towards the other surface of the refraction/total reflection plate being formed concentrically on the sawtooth surface of the refraction/total reflection plate.

Transparent screen and projection display apparatus

Growing community of inventors

Tokyo, Japan

Shuso Wadaka