Methods of forming direct and decorative illumination

• US 8,746,930 B2
• Filed: 12/14/2011
• Issued: 06/10/2014
• Est. Priority Date: 11/04/2003
• Status: Active Grant

• Current Assignee: LEDVANCE LLC (MLS Co. Ltd.)
• Original Assignee: TerraLUX Incorporated
• Inventors: Catalano, Anthony, Harrison, Daniel J.
• Primary Examiner(s): Ward, John A
• Application Number:
  US13/325,473
• Publication Number:
  US 20120134150A1
• Time in Patent Office: 909 Days
• Field of Search: 362/257, 362/84, 362/231, 362/235, 362/249.02
• US Class Current: 362/257
• CPC Class Codes: F21K 9/233 specially adapted for generating a spot light distribution, e.g. for substitution of reflector lamps
• CPC Class Codes: F21K 9/60 Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
• CPC Class Codes: F21K 9/61 using light guides
• CPC Class Codes: F21K 9/64 using wavelength conversion means distinct or spaced from the light-generating element, e.g. a remote phosphor layer
• CPC Class Codes: F21V 1/12 Composite shades , i.e. shades being made of distinct parts
• CPC Class Codes: F21V 13/02 Combinations of only two kinds of elements
• CPC Class Codes: F21V 2200/40 of hollow light guides
• CPC Class Codes: F21V 29/83 the elements having apertures, ducts or channels, e.g. heat radiation holes
• CPC Class Codes: F21V 3/12 the coatings comprising photoluminescent substances
• CPC Class Codes: F21V 7/0008 providing for indirect lighting
• CPC Class Codes: F21W 2121/00 Use or application of lighting devices or systems for decorative purposes, not provided for in codes F21W2102/00 – F21W2107/00
• CPC Class Codes: F21Y 2105/10 comprising a two-dimensional array of point-like light-generating elements
• CPC Class Codes: F21Y 2107/00 Light sources with three-dimensionally disposed light-generating elements
• CPC Class Codes: F21Y 2113/20 of different form
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/00014 the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details
• CPC Class Codes: H01L 33/58 Optical field-shaping elements
• CPC Class Codes: H05B 45/10 : Controlling the intensity of the light
• CPC Class Codes: H05B 45/3725 : Switched mode power supply [SMPS]
• CPC Class Codes: H05B 45/38 : using boost topology
• CPC Class Codes: H05B 45/40 : Details of LED load circuits
• CPC Class Codes: Y02B 20/30 : Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

Abstract

In various embodiments, direct illumination is provided from a primary light emitter and decorative illumination is provided from a secondary light emitter illuminating a shade.

Claims

1. A method of illumination from a light source comprising a primary light emitter, a secondary light emitter different from the primary light emitter, and a shade, the method comprising:

providing direct illumination from the primary light emitter by transmitting light emitted by the primary light emitter through a first portion of the shade substantially without modification of the light emitted by the primary light emitter;

illuminating a second portion of the shade, different from the first portion, with light from the secondary light emitter;

modifying the light illuminating the second portion of the shade; and

transmitting the modified light through the second portion of the shade, thereby forming at least a portion of decorative illumination emitted in a direction different from a direction of the direct illumination,

wherein the shade comprises a phosphor, and modifying the light illuminating the second portion of the shade comprises converting a wavelength of light from the secondary light emitter to a different wavelength, the converted light exiting the shade and forming at least a portion of the decorative illumination.

2. The method of claim 1, wherein the shade is disposed around and spaced apart from the secondary light emitter.

3. The method of claim 1, wherein the shade is disposed around and spaced apart from the primary light emitter.

4. The method of claim 1, wherein the decorative illumination consists essentially of the converted light.

5. The method of claim 1, wherein the decorative illumination comprises a mixture of the converted light and unconverted light from the secondary light emitter.

6. The method of claim 1, wherein modifying the light illuminating the second portion of the shade comprises at least one of blocking a portion of the light from the secondary light emitter, reflecting a portion of the light from the secondary light emitter, or diffracting a portion of the light from the secondary light emitter.

7. The method of claim 1, wherein the first portion of the shade is substantially transparent.

8. The method of claim 1, wherein providing direct illumination comprises emitting at least a portion of light from the primary light emitter through an opening in the shade.

9. The method of claim 1, wherein the primary light emitter comprises at least one light-emitting diode.

10. The method of claim 1, wherein the secondary light emitter comprises at least one light-emitting diode.

11. The method of claim 1, wherein the direct illumination is distinct from the decorative illumination in terms of at least one of intensity or color.