Maintenance free emergency lighting
First Claim
1. An emergency lighting device comprising an illumination lamp for illuminating a surrounding area, an energy storage unit for providing electrical energy for powering the lamp, a charging arrangement for charging the energy storage unit, and control means for activating the lamp and for controlling the charging, wherein the energy storage unit essentially comprises an ultra-capacitor for storing the electrical energy.
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Accused Products
Abstract
An emergency lighting device comprises an illumination lamp for illuminating an area and an energy storage unit for providing electrical energy for powering the lamp. According to the invention, the energy storage unit comprises an ultra-capacitor for storing the electrical energy. As the ultra-capacitor shows hardly any deterioration over time, extensive, e.g. periodical testing of the emergency lighting device during its lifetime can be omitted. A charging arrangement for charging the ultra-capacitor in the emergency lighting device is described.
32 Citations
11 Claims
- 1. An emergency lighting device comprising an illumination lamp for illuminating a surrounding area, an energy storage unit for providing electrical energy for powering the lamp, a charging arrangement for charging the energy storage unit, and control means for activating the lamp and for controlling the charging, wherein the energy storage unit essentially comprises an ultra-capacitor for storing the electrical energy.
Specification