White LED lighting device and a lighting appliance

An LED lighting device (6) having an LED (8) emitting white light and optical filter means (12) suitable for filtering the white light emitted by the LED (8). The optical filter means comprise at least two optical filters (12) that have different transmission coefficients and that are positionable t...

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Bibliographische Detailangaben
Hauptverfasser:	Comte, Lionel, Valteau, Cecilia, Jousse, Robin
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING DIAGNOSIS ELECTRIC HEATING ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ELECTRICITY FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMSTHEREOF HEATING HUMAN NECESSITIES HYGIENE IDENTIFICATION INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21Sand F21V, RELATING TO THEFORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THELIGHT EMITTED INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21Sand F21V, RELATING TO USESOR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS LIGHTING MECHANICAL ENGINEERING MEDICAL OR VETERINARY SCIENCE NON-PORTABLE LIGHTING DEVICES STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHERARTICLES, NOT OTHERWISE PROVIDED FOR SURGERY SYSTEMS THEREOF VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLEEXTERIORS WEAPONS
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Beschreibung
Zusammenfassung:	An LED lighting device (6) having an LED (8) emitting white light and optical filter means (12) suitable for filtering the white light emitted by the LED (8). The optical filter means comprise at least two optical filters (12) that have different transmission coefficients and that are positionable to filter the light emitted by the LED (8) individually. The lighting device (6) includes a power supply unit (10) suitable for delivering different power supply currents to the LED (8) depending on whether one or the other of the optical filters (12) is positioned to filter the light from the LED (8), so as to modify the color temperature of the light emitted by the LED (8).