Color wash light

• US 6,572,241 B1
• Filed: 03/26/2001
• Issued: 06/03/2003
• Est. Priority Date: 06/17/1998
• Status: Expired due to Fees

• Current Assignee: Isometrix Lighting & Design Limited
• Original Assignee: Isometrix Lighting & Design Limited
• Inventors: Coles, Jonathan, Chan, Arnold
• Primary Examiner(s): O'Shea, Sandra
• Assistant Examiner(s): Zeade, Bertrand
• Application Number:
  US09/719,897
• Time in Patent Office: 799 Days
• Field of Search: 362/230, 362/231, 362/244, 362/245, 362/246, 362/247, 362/295, 362/251, 362/293, 362/330, 362/339
• US Class Current: 362/231
• CPC Class Codes: F21S 10/02 changing colors F21S10/002 - F21S10/007, F21S10/04 take precedence
• CPC Class Codes: F21V 5/02 of prismatic shape F21V5/04 takes precedence
• CPC Class Codes: F21V 5/04 of lens shape
• CPC Class Codes: F21V 9/40 with provision for controlling spectral properties, e.g. colour, or intensity

Abstract

A lighting system comprises a plurality of adjacent light sources of different colors. Each light source has a wide angle beam in a first plane and a narrower angled beam in a substantial perpendicular second plane. As a result, efficient mixing of light is achieved in the first plane.

Claims

1. A lighting system, said system comprising:

a plurality of light sources that are positioned adjacent each other and oriented to emit light in beams centered along parallel axes, each said light source being configured to emit a beam of light of a different color; and

a spread lens located in front of said light sources, said spread lens configured to cause the light beams emitted by said light sources to widen along a first common plane so that the light beams mix in the first common plane while maintaining a narrow profile along a second common plane, the second common plane being substantially perpendicular to the first common plane.

2. The lighting system according to claim 1, wherein said spread lens comprises a set of parallel linear prismatic refractors.

3. The lighting system according to claim 2, wherein said spread lens comprises a plurality of parallel semi-specular elements.

4. The lighting system according to claim 1, further including a diffuser positioned between each said light source and the spread lens.

5. The lighting system according to claim 1 in which said light sources are arranged in a linear array.

6. The lighting system according to claim 1, in which said light sources are arranged in a circular array, each said light source pointing towards a center of the circle defined by the array.

7. The lighting system according to claim 6, in which the circular array surrounds a convex dome which mixes and reflects light from the sources onto a surface facing the convex surface of the dome.

8. The lighting system of claim 1, wherein each said light source further includes a separate, user-set intensity controller for regulating the intensity of the light beam emitted by said light source so that the color of light produced by the mixing of the emitted light beams is selectively regulated by regulating the light emitted from each said light source.

9. The lighting system of claim 8, further including a master regulator connected to each said light source intensity controller, said master regulator having a user-actuated color select controller, wherein said master regulator is configured to control the intensity of the light emitted by each said light source through said intensity controllers in response to the setting of said color select controller.

10. A lighting system according to claim 9, wherein said color select controller comprises a rotary knob.

11. The lighting system according to claim 9, wherein said color select controller comprises a slider.

12. The lighting system of claim 8, wherein a power supply is connected to each said light source to provide an individually selected amount of power to said light source to regulate the intensity of light emitted by said light source and said light source power supplies function as said light source intensity controllers.

13. The lighting source of claim 1, wherein:

said light sources are aligned so that the light beams emitted by said light sources along axes that are coplanar; and

said spread lens is configured so that the first common plane, the plane along which the light beams are widened, is the plane along in which the axes of the light beams are located.

14. The lighting system of claim 1, further including a plurality of light sources that are configured to emit light of a first color and a plurality of light sources that are configured to emit light of a second color, the second color being different from the first color.

15. A lighting system, said lighting system comprising:

a plurality of light sources, each said light source comprising;

a light unit configured to emit a variable intensity light beam in response to an energization signal applied to said light unit; and

an adjustable power supply for supplying a variable energization signal to said light unit; and

a spread lens disposed in front of said light sources, said spread lens configured to receive the emitted beams of light and widen the beams in a first plane while the beams maintain narrow profiles in a second plane that is substantially perpendicular to the first plane,

wherein said light units each emit a different color of light and said light units and said spread lens are arranged and configured so that said light units emit light beams that are wide along a first common plane to said light units so that the light beams mix in the first common plane to produce a mixed color output light and that are narrow in a second common plane to said light units, the second common plane being substantially perpendicular to the first common plane; and

a control means connected to said light source power supplies for, in response to a user-entered command, regulating the energization signals supplied by said power supplies to cause the intensity of the light emitted by said light units to vary so as to regulate the color of the mixed color output light.

16. The lighting system of claim 15, wherein:

each said light unit includes a light emitting element;

the light emitted by each said light emitting element is applied to a separate columniation tube that focus the light emitted by said light emitting element into a substantially column shaped light beam that is centered around an axis, and said light units are arranged so that the axes along which the column-shaped light beams are emitted from said columniation tubes are in the first common plane; and

said spread lens is positioned to receive the light beams emitted from said columniation tubes and said spread lens is oriented to cause the light beam emitted by each said columniation tube widen in the first common plane while maintaining a narrow profile in the second common plane.

17. The lighting system of claim 15, wherein said control means includes a single user-set control member that is set to establish the color of the output light and said control means is configured to regulate the energization signals supplied to said light units based on the setting of said user-set control member.

18. The lighting system of claim 15, further including a plurality of light sources that are configured to emit light of a first color and a plurality of light sources that are configured to emit light of a second color, the second color being different from the first color.

19. A lighting system comprising:

a plurality of light sources, each said light source having;

a light unit that emits a variable amount of light; and

a focusing unit for receiving the light emitted by said light unit and forming the light into a substantially column shaped light beam that is centered along an axis

wherein, said light sources are configured so that said light units emit light of different colors and said light sources are positioned so that light beams emitted from said focusing units are centered on axes that are in a first plane;

a spread lens configured to receive the light beams from said light units, said spread lens being configured to widen the light beams along the first plane so that the light beams mix along the first plane to produce an output light of mixed color and said spread lens is further configured so that the light beams emitted by said spread lens in a second plane are narrower than the beams emitted in the first plane, the second plane being substantially perpendicular to the first plane; and

a single control unit attached to said light units for regulating the intensity of light emitted on a color-by-color basis by said light units so that, by regulating the intensity of the light emitted by said light units, said control unit establishes the color of the output light.

20. The lighting system of claim 19, wherein:

each said light unit includes a light emitting element and an adjustable power supply that is connected to said light emitting element to apply a variable energization signal to said light emitting element to regulate the intensity of light emitted by said light emitting element; and

said control unit is connected to said adjustable power supplies for establishing the level of the energization signals applied by said power supplies to said light units.

21. The lighting system of claim 19, further including a plurality of light sources each with a light unit that emits light of a single first color and a plurality of light sources each with a light unit that emits light of a single second color that is different from the first color.