Autonomous solid state lighting system
AssigneeKoninklijke Philips Electronics N.V.
InventorsChin Chang, Gert W. Bruning
Life of this patent
Estimating the term…
Abstract
An autonomous solid state lighting system has a charge mode which collects energy and produces electric power with a solid state energy source, converts the voltage of the electric power using a bi-directional power converter, and stores the power in an energy storage device. A discharge mode draws electric power from the energy storage device, converts the voltage of the electric power using the bi-directional power converter, and produces light from a solid state light source. A controller controls the charge and discharge modes. In one embodiment, the solid state energy source can be a solar cell panel, the solid state light source can be an LED module, and the energy storage device can be a battery pack.
Claims26
A method of providing an autonomous solid state lighting system comprising:
- collecting electric power from a solid state energy source;
- increasing the voltage of the electric power using a bi-directional power converter;
- storing the higher voltage electric power;
- decreasing the voltage of the stored electric power using the bi-directional power converter;
- and
- powering a solid state light source with the lower voltage electric power.
An autonomous solid state lighting system comprising:
- means for collecting electric power, the electric power collecting means being solid state,
- bi-directional means for converting the voltage of the electric power;
- means for storing the electric power;
- and
- means for lighting, the lighting means being solid state;
- wherein the converting means increases the voltage of the electric power collected from the electric power collecting means for storage in the electric power storing means, and decreases the voltage of the electric power stored in the electric power storing means for powering the lighting means.
An autonomous solid state lighting system comprising:
- means for collecting electric power, the electric power collecting means being solid state;
- means for converting the voltage of the electric power;
- means for storing the electric power;
- means for lighting, the lighting means being solid state;
- wherein the voltage converting means increases the voltage of the electric power collected from the electric power collecting means for storage in the electric power storing means, and decreases the voltage of the electric power stored in the electric power storing mans for powering the lighting means, and
- means for preventing lighting of the lighting means while collecting electric power.
An autonomous solid state lighting system comprising:
- a bi-directional power converter that passes current in opposite directions;
- a solar cell panel operably connected to the bi-directional power converter;
- a battery pack operably connected to the bi-directional power converter;
- a light emitting diode (LED) module operably connected to the bi-directional power converter;
- and
- a controller, the controller controlling the bi-directional power converter.
Dependencies are inferred from the claim text.