Reflective image display apparatus

Details Reflective image display apparatus Reflective image display apparatus

1998-09-23

2000-02-08

Sikes, William L.

Optical: systems and elements

Single channel simultaneously to or from plural channels

By partial reflection at beam splitting or combining surface

359631, 349 11, G02B 2714

Patent

active

060233737

ABSTRACT:
The present invention relates to an image display apparatus suitable for a head mounted display which apparatus has been made compact as a whole by the use of a reflection type liquid crystal display element. The apparatus has a first optical element which has an incidence surface on which a light beam is incident, at least two curved reflecting surfaces made eccentric with respect to each other for reflecting the light beam incident from the incidence surface, and an emergence surface from which the light beam from the curved reflecting surfaces emerges. A reflection type image display device provided on the incidence surface side. A light beam from a light source is caused to enter from one of the two curved reflecting surfaces which comprises a half mirror surface, and emerge from the incidence surface and illuminate the image display device. The light beam from the image display device is caused to enter from the incidence surface of the first optical element and be reflected by the curved reflecting surfaces, and thereafter emerge from the emergence surface, and image information displayed by the image display device is observed from the emergence surface side.

REFERENCES:
patent: 5734596 (1998-03-01), Williams
patent: 5812323 (1998-09-01), Takahashi
patent: 5875056 (1999-02-01), Takahashi

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