Light Emitting Diode (LED) Lighting System Having Adjustable Output

• US 20120327663A1
• Filed: 06/22/2011
• Published: 12/27/2012
• Est. Priority Date: 06/22/2011
• Status: Abandoned Application

• Current Assignee: Semileds Optoelectronics Company Limited (SemiLEDs Inc)
• Original Assignee: Semileds Optoelectronics Company Limited (SemiLEDs Inc)
• Inventors: DOAN, TRUNG TRI
• Application Number:
  US13/165,853
• Publication Number:
  US 20120327663A1
• Time in Patent Office: Days
• US Class Current: 362/294
• CPC Class Codes: F21K 9/232 specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
• 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 9/64 using wavelength conversion means distinct or spaced from the light-generating element, e.g. a remote phosphor layer
• 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 17/12 by screwing
• CPC Class Codes: F21V 3/12 the coatings comprising photoluminescent substances
• CPC Class Codes: F21V 9/08 for producing coloured light, e.g. monochromatic; for reducing intensity of light with provision for controlling the colour F21V9/40
• CPC Class Codes: F21Y 2105/10 comprising a two-dimensional array of point-like light-generating elements
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

A light emitting diode (LED) lighting system includes a base, a power supply on the base, an LED module on the base having one or more LED dice configured to emit electromagnetic radiation having a selected wavelength range, and multiple interchangeable wavelength conversion lenses configured for removable attachment to the base in light communication with the LED module. Each lens has a different configuration such that the lenses can be changed to vary the electromagnetic radiation output of the light emitting diode (LED) lighting system. The wavelength conversion lenses can be separate from a cover for the light emitting diode (LED) lighting system or can be formed directly on the cover.

Claims

1. A light emitting diode (LED) lighting system comprising:

a base;

a power supply on the base;

a LED module on the base in electrical communication with the power supply comprising at least one LED die configured to emit electromagnetic radiation having a selected wavelength range;

a first wavelength conversion lens configured for removable attachment to the base in light communication with the LED module configured to change the electromagnetic radiation emitted by the LED module into a first wavelength range to produce a first electromagnetic radiation output for the system; and

a second wavelength conversion lens interchangeable with the first wavelength conversion lens configured to change the electromagnetic radiation emitted by the LED module into a second wavelength range to produce a second electromagnetic radiation output for the system different than the first electromagnetic radiation output.

2. The light emitting diode (LED) lighting system of claim 1 wherein the selected wavelength range comprises a blue spectral range, the first wavelength range comprises a first yellow spectral range and the second wavelength range comprises a second yellow spectral range.

3. The light emitting diode (LED) lighting system of claim 1 wherein the first electromagnetic radiation output comprises white light having a first color temperature and the second electromagnetic radiation output comprises white light having a second color temperature.

4. The light emitting diode (LED) lighting system of claim 1 further comprising a cover and an attachment mechanism configured to attach the cover and the first wavelength conversion lens or the second wavelength conversion lens to the base.

5. The light emitting diode (LED) lighting system of claim 4 wherein the attachment mechanism comprises an element selected from the group consisting of threads, screws, snap fits, press fits, compression rings, snap taps and adhesives.

6. The light emitting diode (LED) lighting system of claim 1 wherein the first lens and the second lens each comprises a transparent cover.

7. A light emitting diode (LED) lighting system comprising:

a base having a heat sink and a power supply;

a LED module on the base in thermal communication with the heat sink and in electrical communication with the power supply comprising at least one LED die configured to emit electromagnetic radiation having a selected wavelength range; and

a plurality of wavelength conversion lenses, each wavelength conversion lens configured for separate attachment to the base in light communication with the LED module, each wavelength conversion lens configured to convert at least some of the electromagnetic radiation emitted by the LED module to produce a different electromagnetic radiation output for the system comprising white light having a particular perceived color temperature.

8. The light emitting diode (LED) lighting system of claim 7 further comprising a cover configured to attach each wavelength conversion lens separately to the base.

9. The light emitting diode (LED) lighting system of claim 8 further comprising an attachment mechanism for attaching the cover and the wavelength conversion lenses to the base.

10. The light emitting diode (LED) lighting system of claim 9 wherein the attachment mechanism comprises an element selected from the group consisting of threads, screws, snap fits, press fits, compression rings, snap taps and adhesives.

11. The light emitting diode (LED) lighting system of claim 8 wherein each wavelength conversion lens comprises a separate element configured to attach to the cover.

12. The light emitting diode (LED) lighting system of claim 7 wherein each wavelength conversion lens comprises a wave length conversion layer formed on a different cover attachable to the base.

13. The light emitting diode (LED) lighting system of claim 7 wherein the perceived color temperature is selected from the group consisting of warm white (2700-3000 K) and cool white (over 5000 K).

14. The light emitting diode (LED) lighting system of claim 7 wherein the base comprises an element selected from the group consisting of screw cap, bayonet, candelabra, mogul, or screw terminals for connection to wires.

15. A light emitting diode (LED) lighting system comprising:

a base having a heat sink and a power supply;

a LED die mounted to the base in thermal communication with the heat sink and in electrical communication with the power supply configured to emit electromagnetic radiation in a selected spectral range;

a first lens configured for removable attachment to the base having a first wavelength conversion material configured to convert at least some of the electromagnetic radiation emitted by the LED die to produce an electromagnetic radiation output for the system comprising white light having a first color temperature; and

a second lens interchangeable with the first lens having a second wavelength conversion material configured to convert at least some of electromagnetic radiation emitted by the LED die to produce an electromagnetic radiation output for the system comprising white light having a second color temperature.

16. The light emitting diode (LED) light bulb of claim 15 wherein the selected spectral range has a wavelength of from 450 to 490 nm.

17. The light emitting diode (LED) lighting system of claim 15 wherein the first lens and the second lens each comprises a transparent cover having an attachment mechanism selected from the group consisting of threads, screws, snap fits, press fits, compression rings, snap taps and adhesives.

18. The light emitting diode (LED) lighting system of claim 15 a cover configured to attach the first lens and the second lens to the base, the cover having a configuration selected from the group consisting of spotlight, form factor, vivid, miniature, subminiature, Dulux, u-shape, circline, octron, slimline, automotive and special purpose.

19. The light emitting diode (LED) lighting system of claim 15 wherein the first color temperature and the second color temperature are selected from the group consisting of warm white, cool white and natural white.

20. The light emitting diode (LED) light bulb of claim 15 wherein the base includes a contact on the tip and thread contacts configured for mating engagement with a socket.