White LED lighting device and a lighting appliance
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United States of America Patent
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Mar 20, 2018
Issued Date -
N/A
app pub date -
Mar 11, 2013
filing date -
Mar 27, 2012
priority date (Note) -
In Force
status (Latency Note)
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Abstract
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).
First Claim
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International Classification(s)
- F21V:FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES....
- F21W:INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21L,....
- H05B:ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE ....
- F21Y:INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21L,....
- A61B:DIAGNOSIS; SURGERY; IDENTIFICATION
- F21S:NON-PORTABLE LIGHTING DEVICES OR SYSTEMS THEREOF
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