White AC LED
First Claim
Patent Images
1. An LED light source comprising:
- a first set of LEDs, the first set comprising one or more LEDs of a first color; and
a second set of LEDs, the second set comprising one or more LEDs of a second color,wherein the first color and the second color are different,wherein the number of LEDs in the first set has a ratio to the number of LEDs in the second set, the ratio selected based on the amount of luminous flux emitted by a first LED in the first set at a determined current and the amount of luminous flux emitted by a second LED in the second set at the determined current to obtain a desired color spectrum; and
wherein the LEDs in the first and second sets of LEDs are in series.
2 Assignments
0 Petitions
Accused Products
Abstract
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.
21 Citations
29 Claims
-
1. An LED light source comprising:
-
a first set of LEDs, the first set comprising one or more LEDs of a first color; and a second set of LEDs, the second set comprising one or more LEDs of a second color, wherein the first color and the second color are different, wherein the number of LEDs in the first set has a ratio to the number of LEDs in the second set, the ratio selected based on the amount of luminous flux emitted by a first LED in the first set at a determined current and the amount of luminous flux emitted by a second LED in the second set at the determined current to obtain a desired color spectrum; and wherein the LEDs in the first and second sets of LEDs are in series. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. An LED light source comprising:
a plurality of sets of LEDs, each set comprising one or more LEDs of a single color; wherein the color of the LEDs in each set is different from the colors of the LEDs in other sets, wherein each set has a corresponding value of luminous flux, the value of luminous flux based on the amount of luminous flux emitted by an LED in that set at a determined current, wherein the numbers of LEDs corresponding to the plurality of sets are determined based on a ratio, the ratio based on the values of luminous flux corresponding to the plurality of sets of LEDs to obtain a desired output light color, and wherein the LEDs in the plurality of sets are all in series. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
-
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 comprising one or more LEDs of a first color; selecting a second set of LEDs, the second set comprising one or more LEDs of a second color, wherein the second color is different from the first color; determining the number of LEDs in the first set and the number of LEDs in the second set based on a ratio, the ratio selected based on the amount of luminous flux emitted by a first LED in the first set at a determined current and the amount of luminous flux emitted by a second LED in the second set at the determined current to obtain a desired color spectrum; and running the LEDs in the first and second sets in series. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25)
-
-
26. A method of developing a circuit with white or arbitrary light color output, comprising:
-
providing a plurality of sets of LEDs, each set comprising one or more LEDs of a single color; wherein the color of the LEDs in each set is different from the colors of the LEDs in other sets, and wherein each set has a corresponding value of luminous flux, the value of luminous flux based on the amount of luminous flux emitted by an LED in that set at a determined current; determining the numbers of LEDs corresponding to the plurality of sets based on a ratio, the ratio selected based on the values of luminous flux corresponding to the plurality of sets of LEDs to obtain a desired output light color; and running the LEDs in the plurality of sets in series. - View Dependent Claims (27, 28, 29)
-
Specification