LED illuminated sign
US4929936A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 21, 1988 |
| Grant date | May 29, 1990 |
| Priority date | — |
| Expiry date | Mar 21, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09F13/0472
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A lighted sign, particularly useful for identifying a residence number on a street, has a display panel having a plurality of aligned numbers illuminated by LED's which are selectively programmable by the user to display the proper house number. In the event of an emergency, the sign is changeable to an emergency mode in which the numbers flash intermittently, and the LED's change from a first color to a red color indicating the emergency. The sign is activated manually or by means of a photocell, and the emergency condition may be actuated by a manual switch for a remote transmitter. The device may also be used to activate other emergency alert signals, such as an audible signal or a signal transmitter over phone lines.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.