Image display apparatus

Computer graphics processing and selective visual display system – Image superposition by optical means – Operator body-mounted heads-up display

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359630, G09G 500

Patent

active

058121005

ABSTRACT:
A compact, lightweight and wide-field head-mounted image display apparatus which is capable of projecting an image overflowing with a sence of immersion. The apparatus includes an LCD (1), a beam splitter prism (5) having a half-mirror (3) which is disposed at a tilt at an intersection between the optical axis of the LCD (1) and the observer's visual axis to lead an image ray bundle emanating from the LCD (1) to a pupil (4) of an observer's eyeball, and a concave mirror (2) which is provided on a surface of the prism (5) on the side thereof which is remote from the LCD (1). Thus, after entering the prism (5), the image displayed on the LCD (1) is successively reflected by the concave mirror (2) and the half-mirror (3) and then enters the eyeball (4). The effective apertures of the half-mirror (3), the concave mirror (2) and the beam splitter prism (5) are reduced, thereby making the image of the periphery of the image display device unsharp, and thus providing dynamic presence.

REFERENCES:
patent: 4269476 (1981-05-01), Gauthier et al.
patent: 4818045 (1989-04-01), Chang
patent: 4994794 (1991-02-01), Price et al.
patent: 5266930 (1993-11-01), Ichikawa et al.
patent: 5539578 (1996-07-01), Togino et al.

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