LIGHTING UNIT

• US 20190331319A1
• Filed: 12/22/2017
• Published: 10/31/2019
• Est. Priority Date: 12/23/2016
• Status: Active Grant

• Current Assignee: Manmade Products Limited UK
• Original Assignee: Gavo Lighting Ltd., Machine Shop Holdings Ltd.
• Inventors: LOIBLE, Steve, GAVIGAN, Rob
• Granted Patent: US 10,920,961 B2
• Time in Patent Office: Days
• CPC Class Codes: F21V 17/002 with provision for interchangeability, i.e. component parts being especially adapted to be replaced by another part with the same or a different function F21V17/10 takes precedence
• CPC Class Codes: F21V 17/08 onto the supporting or suspending arrangements of the lighting device, e.g. power cords, standards
• CPC Class Codes: F21V 17/18 Latch-type fastening, e.g. with rotary action
• CPC Class Codes: F21V 9/00 Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters coloured shades F21V1/00; elements characterised by cooling arrangements F21V29/502
• CPC Class Codes: F21V 9/02 for simulating daylight F21V9/04, F21V9/06 take precedence
• CPC Class Codes: F21W 2131/406 for theatres, stages or film studios

Abstract

A lighting unit comprises a mount for rotating a plasma light source within a cylinder of metal gauze that provides a primary Faraday cage for shielding against radio-frequency radiation from the light source. The shielding is extended using a parabolic reflector for the emitted light in combination with a gauze to establish a secondary Faraday shield enclosing the primary cage. The gauze covers a ring that is sealed between the rim of the front open-mouth of the reflector and a slide-in cassette of the lighting unit, and can be of a metallic honeycomb configuration enhancing the operation and light output from the unit.

Claims

1. A lighting unit comprising:

a mount for a light source,

at least one removable light-conditioning element,

a cassette arranged to house the at least one removable light-conditioning element for conditioning light from the light source, and

at least one frame member supporting the cassette in front of the mount, and the cassette having a side openable for receiving entry of the at least one removable light-conditioning element into the cassette for conditioning the light from the light source.

6. The lighting unit as claimed in claim 1, wherein the cassette has an interior, and the interior of the cassette includes guides configured to cooperate with at least one edge of the at least one removable light-conditioning element to hold the at least one removable light-conditioning element in place.

11. The lighting unit as claimed in claim 1, comprising a reflector mounted between the mount for a light source and the cassette, for guiding light from the light source toward the cassette.

12. The lighting unit as claimed in claim 11, in which the reflector has radio-frequency shielding properties.

18. The lighting unit as claimed in claim 1, wherein the mount for a light source comprises a mount for rotating the light source.

20. The lighting unit as claimed in claim 1, comprising a further element having at least a central region comprising material for conditioning light.

21. The lighting unit as claimed in any claim 20, wherein the material of the at least a central region of the further element comprises a lattice material having radio-frequency shielding properties.

22. The lighting unit as claimed in claim 1, wherein the mount for a light source is a mount for a plasma light source.

2-5. -5. (canceled)

7-10. -10. (canceled)

13-17. -17. (canceled)

19. (canceled)

23. A lighting unit comprising:

a plasma light source,

a mount for the plasma light source,

a shield mounted with the mount for shielding against radio-frequency radiation from the plasma light source, and

the shield providing the radio-frequency shielding whilst allowing the passage of light from the plasma light source through the shield.

24. The lighting unit as claimed in claim 23, wherein the shield comprises a gauze of substantially honeycomb configuration and formed of a metallic material.

25. The lighting unit as claimed in claim 23, comprising a reflector for directing light forwardly from the light source, the reflector having a forward open end through which the forwardly-directed light exits the reflector, and a light-combining element located in front of the forward open end of the reflector, wherein the light-combining element is of a lattice open-cell form.

28. The lighting unit as claimed in claim 25, wherein the light-combining element and the reflector both provide shielding against radio-frequency radiation from the plasma light source.

29. The lighting unit as claimed in claim 23, comprising a primary Faraday cage enclosing the plasma light source, and a secondary Faraday cage enclosing the first Faraday cage, and the primary and secondary Faraday cages each provide shielding against radio-frequency radiation from the plasma light source.

26-27. -27. (canceled)

30. A lighting unit comprising:

a plasma light source,

a rotatable mount mounting the plasma light source,

a Faraday cage enclosing the plasma light source for shielding against radio-frequency radiation from the plasma light source,

the Faraday cage providing the radio-frequency shielding whilst allowing light from the plasma light source to exit the Faraday cage,

a light-combining element having a lattice-structure of holes for light to pass through, and

optical means directing the light exiting the Faraday cage to pass through the holes of the light-combining element.

31. The lighting unit as claimed in claim 30, comprising a further Faraday cage, wherein the Faraday cage enclosing the plasma light source is enclosed within the further Faraday cage, and the light-combining element is electrically-conductive to form part of the further Faraday cage.