Patent ID: 8796952
Filing Date: 2014-08-05
Classification: H05B

Abstract:
1. A light emitting device, comprising: a first string of at least one light emitting diode (“LED”); a second string of at least one LED; a third string of at least one LED; a drive circuit that is configured to set the relative drive currents provided to the first string and to the second string so that the color point on the 1931 CIE Chromaticity Diagram of the combined output of the first string and the second string is approximately on a line that extends on the 1931 CIE Chromaticity Diagram through a pre-selected color point and a color point of an output of the third string, and that is further configured to set the relative drive currents provided to the third string relative to the drive currents provided to the first and second strings so that the color point on the 1931 CIE Chromaticity Diagram of the combined output of the light emitting device is approximately at the pre-selected color point wherein one of the first through third strings includes at least one blue-shifted-yellow LED, and wherein one of the first through third strings of LEDs includes at least one blue-shifted-green LED.