Security-enhanced display device
US6650306B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 6, 2001 |
| Grant date | Nov 18, 2003 |
| Priority date | — |
| Expiry date | Dec 13, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F21/84
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.