Lighting apparatus having a plurality of independently controlled sources of different colors of light
First Claim
1. A lighting apparatus comprising:
- a first source of monochromatic light;
a second source of white light;
a third source of polychromatic light, wherein the monochromatic light, the white light and the polychromatic light mix to form a combined light;
a first driver connecting to the first source to a power supply;
a second driver connecting to the second source to the power supply;
a third driver connecting to the third source to the power supply; and
a controller operably coupled to the first, second and third drivers to vary relative intensities of the monochromatic light, white light, and polychromatic light and thereby vary a correlated color temperature of the combined light.
13 Assignments
0 Petitions
Accused Products
Abstract
A lighting apparatus includes a first source of monochromatic light, a second source of white light, and a third source of polychromatic light. The light from the three sources combine to produce a resultant color of light from the apparatus. The intensities of the light emitted by the first, second and third sources are independently controlled by a controller to produce a desired resultant color of light. Varying the amount of electric current applied to each such light source by substantially an equal amounts to changes the luminance of the combined light with out affecting the resultant color. The lighting apparatus can be operated to replicate a Planckian radiator with a color rendering index of at least 80 throughout a substantial portion of the visible light spectrum produced by the lighting apparatus.
96 Citations
21 Claims
-
1. A lighting apparatus comprising:
-
a first source of monochromatic light; a second source of white light; a third source of polychromatic light, wherein the monochromatic light, the white light and the polychromatic light mix to form a combined light; a first driver connecting to the first source to a power supply; a second driver connecting to the second source to the power supply; a third driver connecting to the third source to the power supply; and a controller operably coupled to the first, second and third drivers to vary relative intensities of the monochromatic light, white light, and polychromatic light and thereby vary a correlated color temperature of the combined light. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A lighting apparatus comprising:
-
a first source that includes a first plurality of emitters of red light; a second source of white light; a third source that includes a second plurality of emitters of green light and a third plurality of emitters of amber light, wherein the red light, the white light, the green light, and the amber light mix to form a combined light; and a control circuit connected to the first, second and third sources and controlling the flow of electricity to the first, second and third sources to vary intensities of the red light, the white light, the green light and the amber light thereby varying the combined light through a plurality of correlated color temperatures. - View Dependent Claims (11, 12, 13, 14)
-
-
15. A lighting apparatus comprising:
-
a monochromatic light source; a white light source a polychromatic light source, wherein light from the monochromatic light source, the white light source and the polychromatic light source mix to form a combined light that has a correlated color temperature and a luminance; and a circuit that independently controls application of electric current to each of the monochromatic light source, the white light source and the polychromatic light source, wherein the circuit varies a relative amount of electric current applied to each such light source to alter the correlated color temperature of the combined light, and wherein the circuit varies electric currents applied to such light sources by substantially equal amounts to alter the luminance of the combined light. - View Dependent Claims (16, 17, 18, 19, 20, 21)
-
Specification