LED COLOR CHANNELS INCLUDING PHOSPHOR-BASED LEDS FOR HIGH LUMINOUS EFFICACY LIGHT SOURCE

1 . A method of manufacture of a light source comprising:

configuring an array of light emitting diodes (LEDs) including at least three color channels each emitting the same color by:

selecting a yellow-greenish channel including a YAG:Ce phosphor emitter pumped by a first LED;

selecting a red channel including a second LED;

selecting a blue green channel including a phosphor emitter pumped by a third LED;

providing a mixing barrel for mixing light generated from the three color channels to simulate a black body radiator at different correlated color temperatures; and

attaching the array of LEDs within the mixing barrel.

2 . The method of claim 1 , further comprising disposing a hemispherical cap over at least a portion of the YAG:Ce phosphor emitter.

3 . The method of claim 1 , further comprising disposing a hemispherical cap over at least a portion of the phosphor emitter of the blue green channel.

4 . The method of claim 1 , wherein selecting the yellow greenish channel includes selecting the yellow greenish channel emitting light within a color zone defined by a tetragon in the International Commission on Illumination (CIE) chromaticity diagram having coordinates of: (0.360638,0.480911), (0.399681,0.464340), (0.419245,0.494098), and (0.379575,0.521592).

5 . The method of claim 1 , wherein selecting the blue green channel includes selecting the blue green channel emitting light within a color zone defined by a tetragon in. the International Commission on Illumination (CIE) chromaticity diagram having coordinates of: (0.127462, 0.183467), (0.108023,0.279327), (0.094522,0.274454), and (0.113662,0.181167).

6 . A method of operating of a color tunable light source with light emitting diodes (LEDs) comprising:

color tuning the color tunable light source to a warm color with a low correlated color temperature (CCT) level by driving a red channel and a yellow greenish channel full on, the red channel and the yellow greenish channel each with one or more LEDs emitting the same color;

color tuning the color tunable light source to a cool color with a high CCT level by driving a blue green channel full on, the blue green channel with one or more LEDs emitting the same color; and

color tuning the color tunable light source to a mid CCT level between the high CCT level and the low CCT level by driving the blue green channel, the red channel, and the yellow greenish channel full on.

7 . The method of claim 6 , wherein the high CCT level is 6500K.

8 . The method of claim 6 , wherein the low CCT level is 2500K.

9 . The method of claim 6 , wherein the mid CCT level is 4100K.

10 . The method of claim 6 , further comprising color tuning from the low CCT level to the mid CCT level by driving the blue channel from low to full on.

11 . The method of claim 6 , further comprising color tuning from the mid CCT level to the high CCT level by driving the red channel and the yellow greenish from full on to low while maintaining a constant ratio of the red channel to the yellow greenish channel.

12 . A light source apparatus comprising:

an array of light emitting diodes (LEDs) including at least three color channels, the at least three color channels includes:

a yellow-greenish channel including a YAG:Ce phosphor emitter pumped by a first LED, wherein the first LED is a royal blue InGaN LED;

a red channel including a second LED; and

a blue green channel including a third LED wherein the third LED is a royal blue InGaN LED; and

a mixing barrel around the array of LEDs for mixing light generated from the three color channels to simulate a black body radiator at different correlated color temperatures;

wherein each of the at least three color channels includes one or more LEDs emitting the same color.

13 . The light source apparatus of claim 12 , wherein the blue green channel includes a phosphor emitter pumped by the third LED, the phosphor emitter being a Ba:Si Oxynitride Eu-doped phosphor.

14 . The light source apparatus of claim 12 , wherein the second LED is an AlInGaP red LED.

15 . The light source apparatus of claim 12 , wherein the second LED is a InGaN royal blue LED pumping a red luminous phosphor with 90% to 95% of total lumens from the second LED and the red luminous phosphor derived from the red luminous phosphor.

16 . The light source apparatus of claim 12 , wherein the second LED is a InGaN royal blue LED pumping a red nitride phosphor.

17 . The light source apparatus of claim 12 , wherein the YAG:Ce phosphor is a Yittrium Aluminum Garnet, Cerium 3+ doped, Y 3 Al 5 O 12 .

18 . The light source apparatus of claim 12 , wherein the phosphor emitter of the blue green channel has the emission spectra peak of 490 nm wavelength.

19 . The light source apparatus of claim 12 , wherein the blue green channel includes a phosphor emitter pumped by the third LED, the phosphor emitter having peak emission at 490 nm wavelength.

20 . The light source apparatus of claim 12 , wherein the blue green channel further including a fixed ratio blue InGaN LED in peak emission wavelength range of 460 nm to 490 nm.

21 . The light source apparatus of claim 12 , wherein the blue green channel includes two sub-channels including a blue InGaN channel and a InGaN royal blue channel doped with Ba:Si 2 O 2 N 2 :Eu2+.

22 . The light source apparatus of claim 12 , wherein the blue green channel includes a long wavelength InGaN blue LED in peak emission range of 490 nm wavelength.