Patent ID: 9271368
Filing Date: 2016-02-23
CPC Classification: F21K,H01L,H05B,Y02B

Claim Text:
1. A light-emitting device, comprising: a plurality of first solid-state light-emitting structures (“SLSs”) configured to convert electrical energy to first optical light, wherein the plurality of first SLSs is connected in series, the plurality of first SLSs comprising multiple light emitters able to generate light having a range of wavelength from 400 nm to 500 nm, the plurality of first SLSs comprising light-emitting diodes (“LEDs”) with phosphor configured to convert a portion of blue photons into photons in yellow or green spectral region; a plurality of second SLSs configured to convert electrical energy to second optical light, wherein the plurality of second SLSs is connected in series; a first balancing resistor element coupled to the plurality of first SLSs in series and configured to provide load balance between the plurality of first SLSs and the plurality of second SLSs, wherein the plurality of first SLSs including the first balancing resistor element and the plurality of second SLSs are coupled in parallel allowing current redistribution in response to fluctuation of operating temperature due to the temperature dependent characteristics of the first balancing resistor element; and a second balancing resistor element coupled to the plurality of second SLSs in series, wherein the second balancing resistor element is capable of redistributing current passing through the plurality of second SLSs to compensate differential voltage drop between the plurality of first SLSs and the plurality of second SLSs.