| 主权项 |
1. A lighting system, comprising:
first and second light sources each comprising a light emitting diode; the first light source being operable to generate light having a first color; the second light source being operable to generate light having a second color; a signal generator operable to generate a timing signal having a period; a color control operable to generate a color control signal to adjust a color output of the lighting system; a controller coupled to the color control to receive the color control signal, and coupled to the first and second light sources; throughout a first range of the color control signal, the controller being operable to alternately pulse the first and second light sources at high rates such that when the first light source is in one of the one and off states, the second light source is in an opposite one of the one and off states, and being operable to vary the duty cycles of the first and second light sources in a smooth and continuous manner as a function of the color control signal between zero (0) percent and one-hundred (100) percent, where a change in the duty cycle of the first light source is opposite and equal in magnitude to a change in the duty cycle of the second light source; throughout a second range of the color control signal different than the first range, the controller being operable to illuminate the first light source at a duty cycle of one-hundred (100) percent and to not illuminate the second light source; and throughout a third range of the color control signal different than the first and second ranges, the controller being operable to illuminate the second light source at a duty cycle one-hundred (100) percent and to not illuminate the first light source. |
