Light pen
US6172668A · kind A · utility
9Cited by
4References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 8, 1993 |
| Grant date | Jan 9, 2001 |
| Priority date | — |
| Expiry date | Oct 8, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/03542
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A light pen for a computer having an elongated body member which contains a photoluminescent material (PLM). The PLM absorbs ambient light of one wavelength, and radiates light of another wavelength in response. The radiated light is directed so as to be projected from a tip of the light pen as required.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.