Full color upconversion display
US5003179A · kind A · utility
22Cited by
5References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 1, 1990 |
| Grant date | Mar 26, 1991 |
| Priority date | — |
| Expiry date | May 1, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG21K2004/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Full color alphanumeric or image displays are produced by upconverting near infrared radiation into visible light. The display system includes an upconverting screen including a host material doped with rare earth ions. The screen may be divided into pixels which may be slectively excited by infrared radiation to emit visible light of a desired color. An intensity-modulated infrared laser beam is scanned across the surface of the screen to selectively excite the screen pixels and produce the desired image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.