Self luminous characters and signs incorporating same
US4928414A · kind A · utility
6Cited by
4References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 4, 1988 |
| Grant date | May 29, 1990 |
| Priority date | — |
| Expiry date | Nov 4, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09F13/42
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A self luminous character comprises a transparent light carrier having a plan shape defining the desired shape of the character and includes a longitudinally extending recess housing one or more self luminous light sources. Light from the or each light source diffuses through the transparent light carrier and is reflected by reflector means to be emitted through a front surface of the carrier and illuminate the plan shape of the character.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.