Power manager system for highway signage
US6028597A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 25, 1996 |
| Grant date | Feb 22, 2000 |
| Priority date | — |
| Expiry date | Jan 25, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2330/021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A power management system for the control and operation of distributed power has a controller operatively connected to a plurality of monitors, switches, control devices, and a visible light emitting array. The monitors, switches, and control devices provide the means for the controller to modulate the power to the visible light emitting array using a current modulator. The current modulator produces a variable power duty cycle that is received by the visible light emitting array. The visible light emitters of that array have a selected perceivable brightness. That brightness is held constant but power is conserved due to the controller modulating the power.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.