Method and apparatus for displaying an alpha channel virtual ima

Details Method and apparatus for displaying an alpha channel virtual ima Method and apparatus for displaying an alpha channel virtual ima

1993-09-07

1995-06-06

Harrison, Jessica J.

Amusement devices: games

Problem eliciting response

Questions and answers

345 9, 353 37, 359629, A63F 922

Patent

active

054215897

ABSTRACT:
The present invention is directed to a method and apparatus for displaying a virtual image and for providing control over the "alpha channel" or transparency of the virtual image. The present invention uses a beam splitter to provide a virtual image to a viewer. Behind the beam splitter is a liquid crystal region for controlling the transparency of the virtual image. Behind the liquid crystal region is a background image. Control of the liquid crystal region is coordinated with control of the virtual image so as to make transparency and opacity of the liquid crystal region follow the portions of the virtual image that are intended to be transparent and opaque, respectively.

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