Electroluminescent identification device
US5709045A · kind A · utility
7Cited by
14References
6Claims
0Family size
Inventor
Key dates
| Filing date | Apr 16, 1996 |
| Grant date | Jan 20, 1998 |
| Priority date | — |
| Expiry date | Apr 16, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S362/812
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An electroluminescent identification device includes an enclosure which supports a variety of opaque alpha-numeric characters, a luminescent lamp which highlights the characters, and an electronic circuit which converts the alternating voltage typically used in doorbell electrical circuits to the higher alternating frequencies required to energize the lamp.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.