Method and apparatus for providing a passive color control scheme using blue and red emitters

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United States of America Patent

PATENT NO 11910501
SERIAL NO

17141457

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Abstract

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A lighting device capable of generating warm or neutral white light using blue light-emitting diodes (“LEDs”), red LEDs, and/or luminescent material that responds to blue LED emission is disclosed. The lighting device includes multiple first solid-state light-emitting structures (“SLSs”), second SLSs, and balancing resistor element. The first SLS such as a string of blue LED dies connected in series is able to convert electrical energy to blue optical light, which is partially turned into longer wavelength emission by the luminescent material. The second SLS such as a red LED die is configured to convert electrical energy to red optical light, wherein the second SLSs are connected in series. While the first SLSs and second SLSs are coupled in parallel, the balancing resistor element provides load balance for current redistribution between the first and second SLSs in response to fluctuation of operating temperature.

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Patent Owner(s)

Patent OwnerAddress
SIGNIFY HOLDING B V5656 AE EINDHOVEN

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Tong, Tao Fremont, CA 68 1577

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