Security-enhanced display device
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United States of America Patent
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Nov 18, 2003
Grant Date -
Feb 6, 2003
app pub date -
Aug 6, 2001
filing date -
Aug 6, 2001
priority date (Note) -
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Abstract
A device for displaying images only to an authorized user includes a display device configured to display the images. The display device includes a backlight for generating incident light of mixed polarization, a first polarization rotator, and a first polarizer disposed between the backlight and the first polarization rotator. An optical shutter device is configured to view the displayed images. The optical shutter device includes a second polarization rotator and a second polarizer. The first and second polarization rotators are synchronously rotated while displaying the images so that the image are only perceived by the authorized user viewing the display device through the optical shutter device.
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