Self-masking viewing apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 12, 1999
Issued Date -
N/A
app pub date -
May 28, 1996
filing date -
Nov 28, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A transparency viewing device including a faceplate adapted for mounting at least one transparency thereon, an LCD array defining an array of pixels, a driver which selectively varies the transparency of the pixels, a source of back illumination for the LCD array wherein the LCD is substantially effective to effectively block light within a relatively limited range of angles around the normal to the LCD and is relatively ineffective to block light reaching it from angles outside the limited range of angles and a light detector which views the array from an angle outside the range of angles at which the LCD is substantially effective to block the light.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully