Self-masking transparency viewing apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Aug 28, 2001
Grant Date -
N/A
app pub date -
Jan 28, 1999
filing date -
Dec 31, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A viewing apparatus (11) for transparencies or the like masks any display areas (20) not covered by transparencies (505-508) by generating masks without moving parts, and adapts the luminance level of the image under study and of other display areas to the optimal viewing conditions required by the observer.
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