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Sharp says that the illusions created when head-mounted video displays are
used to display films could be made to appear more natural. At present, the
viewer sees an image on an LCD screen suspended in space, but in GB 2 317 528 it
proposes filling the viewer’s peripheral vision with pictures of the walls,
ceiling and seats of a cinema—or any other room. The brightness of the
peripheral view changes with the brilliance of the picture, just as it does in a
real cinema. And to make you feel as though you’re really there, the headset
synthesises ambient sounds, such as the noise of popcorn being munched.