Liquid crystal cells – elements and systems – Liquid crystal system – Heads-up display
Patent
1998-08-27
2000-07-25
Malinowski, Walter
Liquid crystal cells, elements and systems
Liquid crystal system
Heads-up display
359629, 359630, G02F 11335, G02B 2714
Patent
active
06094241&
ABSTRACT:
The present invention relates to a compact, composite display apparatus capable of simultaneously establishing a display optical system and an image-pickup optical system or a seethrough optical system without parallax, which has the following structure. The apparatus comprises a display optical system for guiding a light beam from a display device displaying image information, to an eyeball of an observer and an image-pickup optical system for focusing a light beam from the outside on an image pickup device, wherein an optical path separator provided in an optical path is arranged to substantially align an eyeball optic axis of the light beam incident from the display optical system to the eyeball of the observer or a virtual eyeball optic axis as an extension on the outside of the eyeball optic axis with an outside optic axis of the light beam incident from the outside of the image-pickup optical system, the apparatus having a shield device for preventing the light beam from the display device from entering the image pickup device of the image-pickup optical system.
REFERENCES:
patent: 3666346 (1972-05-01), Lucas
patent: 4851902 (1989-07-01), Tezuka et al.
patent: 5106179 (1992-04-01), Kamaya et al.
patent: 5200844 (1993-04-01), Suvada
patent: 5530586 (1996-06-01), Yasugaki
Malinowski Walter
Mixed Reality Systems Laboratory Inc.
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