| 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 cool white color temperature greater than or equal to 2700 degrees Kelvin; the second light source being operable to generate light having a warm white color temperature less than or equal to 2200 degrees Kelvin; a color control providing a variable color control signal to adjust a perceived 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, said controller being operable, in response to a change in the color control signal at a first rate, to change the perceived color output of the lighting system at a second rate slower than the first rate; the color control signal having a first range defined by first and second states; at the first state of the color control signal, the perceived color output of the lighting system being the cool white color, and at the second state of the color control signal, the perceived color output of the lighting system being the warm white color; throughout the first range of the color control signal, the controller being operable to adjust outputs of the first and second light sources, as a function of the color control signal, continuously and in an opposite manner, to smoothly vary the perceived color output of the lighting system from the cool white color to the warm white color; throughout a second range of the color control signal different than the first range, the perceived color output of the lighting system being the cool white color; and throughout a third range of the color control signal different than the first and second ranges, the perceived color output of the light system being the warm white color. |
