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US 2013/0258661 A1Published application
White led lighting device and a lighting appliance
AssigneeMaquet GmbH
InventorsRobin Jousse, Cécilia Valteau, Lionel Comte
Life of this patent
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AssigneeMaquet GmbH
InventorsRobin Jousse, Cécilia Valteau, Lionel Comte
Estimating the term…
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).
An LED lighting device (6) having an LED (8) emitting white light and optical filter means (12) suitable for filtering said white light emitted by the LED (8), the device being characterized in that said optical filter means comprise at least two optical filters (12) that have different transmission coefficients and that are positionable to filter said light emitted by the LED (8) individually, and in that the lighting device (6) includes a power supply unit (10) suitable for delivering different power supply currents to said LED (8) depending on whether one or the other of the optical filters (12) is positioned to filter said light from the LED (8), so as to modify the color temperature of the light emitted by the LED (8).
Dependencies are inferred from the claim text.