WHITE AC LED
A multi-color white LED which can be driven by a single current, and more particularly, to the use of a specific ratio of numbers of different color LEDs to obtain a specific desired color while running all of them at the same current.
1 . An LED light source comprising:
a first set of LEDs, the first set of LEDs comprising one or more LEDs of a first color;
a second set of LEDs, the second set of LEDs comprising one or more LEDs of a second color, wherein the first color and the second color are different;
a third set of LEDs, the third set of LEDs comprising one or more LEDs of a third color, wherein the first color and the third color are different, and wherein the second color and the third color are different;
wherein a ratio of the number of LEDs in the first set of LEDs to the number of LEDs in the second set of LEDs is 1 to 2, and
wherein a ratio of the number of LEDs in the first set of LEDs to the number of LEDs in the third set of LEDs is 2 to 1; and
wherein the LEDs in the first set of LEDs, the second set of LEDs, and the third set of LEDs are in series.
2 . An LED light source as set forth in claim 1 , wherein the number of LEDs in the first set, the second set, and the third set are selected to produce a desired forward voltage.
3 . An LED light source as set forth in claim 2 , wherein the desired forward voltage is an AC line voltage.
4 . An LED light source as set forth in claim 1 , wherein the first color, the second color, and the third color are selected from the group consisting of red, green and blue.
5 . An LED light source as set forth in claim 1 , wherein the LEDs in the first set have a wavelength between approximately 430 nm and 480 nm, wherein the LEDs in the second set have a wavelength between approximately 600 and 630 nm, and wherein the LED light source includes a group of luminophores which are configured to emit light of a wavelength between approximately 555 nm and 585 nm.
6 . An LED light source as set forth in claim 1 , wherein the LED light source is configured to achieve a desired color spectrum of white.
7 . An LED light source as set forth in claim 1 , wherein the LEDs in the first set, the second set, and the third set of LEDs are arranged in a matrix.
8 . An LED light source as set forth in claim 7 , wherein the LEDs in the first set, the second set, and the third set of LEDs are randomly arranged in the matrix.
9 - 17 . (canceled)
18 . A method of producing a spectrum of white light or arbitrary light color from a plurality of LEDs, comprising:
selecting a first set of LEDs, the first set of LEDs comprising one or more LEDs of a first color;
selecting a second set of LEDs, the second set of LEDs comprising one or more LEDs of a second color, wherein the first color and the second color are different;
selecting a third set of LEDs, the third set of LEDs comprising one or more LEDs of a third color, wherein the first color and the third color are different, and wherein the second color and the third color are different;
determining the number of LEDs in the first set and the number of LEDs in the second set based on a ratio of 1 LED of the first color to 2 LEDs of the second color, and
determining the number of LEDs in the first set and the number of LEDs in the third set based on a ratio 2 LEDs of the first color to 1 LED of the third color to obtain a desired color spectrum; and
configuring the LEDs in the first set, second set, and third set of LEDs in series.
19 . A method as set forth in claim 18 , wherein the numbers of LEDs in the first set, the second set, and the third set of LEDs are selected to produce a desired forward voltage.
20 . A method as set forth in claim 19 , wherein the desired forward voltage is an AC line voltage.
21 . A method as set forth in claim 18 , wherein the first color, the second color, and the third color are selected from the group consisting of red, green and blue.
22 . A method as set forth in claim 18 , the method further comprising:
selecting a group of luminophores which are configured to emit light of a wavelength of between approximately 555 nm and 585 nm,
wherein the LEDs in the first set have a wavelength between approximately 430 nm and 480 nm, and
wherein the LEDs in the second set have a wavelength between approximately 600 nm and 630 nm.
23 . A method as set forth in claim 18 , wherein the desired color spectrum is white.
24 . A method as set forth in claim 18 , the method further comprising arranging the LEDs in the first set, the second set, and the third set of LEDs in a matrix.
25 . A method as set forth in claim 24 , the method further comprising randomly arranging the LEDs in the first set, the second set, and the third set of LEDs in the matrix.
26 - 32 . (canceled)