Emergency lighting device for operating a light source, in particular an LED
AssigneeTridonicatco GmbH & Go KG
InventorsDaniel Rohner, Alexander Mair
Life of this patent
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Abstract
An LED driver for operating a light source, in particular an LED, includes an energy storage unit, a driver circuit supplied by the energy storage unit during emergency lighting operation, for operating the light source, and a control unit that activates the driver circuit in such a way that the light source is operated with a constant power or constant current irrespective of the state of charge of the energy storage unit, where the control unit, for the purpose of regulating the power, determines indirectly the level of the current supplied to the light source.
Claims7
An LED driver for operating a light source, in particular an LED, comprising:
- an energy storage unit;
- a driver circuit supplied by the energy storage unit during emergency lighting operation, for operating the light source;
- and
- a control unit that activates the driver circuit in such a way that the light source is operated with a constant power or constant current irrespective of the state of charge of the energy storage unit;
- wherein the control unit, for the purpose of regulating the power, determines indirectly the level of the current supplied to the light source by measuring a plurality of magnitudes of a plurality of operating parameters of an emergency lighting device on a secondary side of a charging circuit.
Dependencies are inferred from the claim text.