LED lamps and luminaires

• US 9,777,915 B2
• Filed: 04/26/2015
• Issued: 10/03/2017
• Est. Priority Date: 04/25/2014
• Status: Active Grant

• Current Assignee: Gooee Limited (Gooee Group Holdings Ltd.)
• Original Assignee: Gooee Limited (Gooee Group Holdings Ltd.)
• Inventors: Johnson, Andrew
• Primary Examiner(s): TSO, LAURA K
• Application Number:
  US15/306,733
• Publication Number:
  US 20170045214A1
• Time in Patent Office: 891 Days
• Field of Search: 362235
• CPC Class Codes: F21K 9/233 specially adapted for generating a spot light distribution, e.g. for substitution of reflector lamps
• CPC Class Codes: F21S 8/026 intended to be recessed in a ceiling or like overhead structure, e.g. suspended ceiling
• CPC Class Codes: F21V 19/003 Fastening of light source holders, e.g. of circuit boards or substrates holding light sources
• CPC Class Codes: F21V 21/26 Pivoted arms
• CPC Class Codes: F21V 23/006 the substrate being distinct from the light source holder
• CPC Class Codes: F21V 23/009 the casing being inside the housing of the lighting device
• CPC Class Codes: F21V 25/12 Flameproof or explosion-proof arrangements
• CPC Class Codes: F21V 29/507 of means for protecting lighting devices from damage, e.g. housings
• CPC Class Codes: F21V 29/713 in direct thermal and mechanical contact of each other to form a single system
• CPC Class Codes: F21V 29/77 with essentially identical diverging planar fins or blades, e.g. with fan-like or star-like cross-section
• CPC Class Codes: F21V 29/773 the planes containing the fins or blades having the direction of the light emitting axis
• CPC Class Codes: F21V 29/83 the elements having apertures, ducts or channels, e.g. heat radiation holes
• CPC Class Codes: F21V 29/89 Metals
• CPC Class Codes: F21V 3/061 the material being glass
• CPC Class Codes: F21V 5/04 of lens shape
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H05B 45/10 Controlling the intensity of the light
• CPC Class Codes: H05B 47/19 via wireless transmission

Abstract

An LED downlight lighting module is provided including an LED module having one or more single LEDs on a first printed circuit board, a heat sink, and a second printed circuit board. In an embodiment, the first printed circuit board is in good thermal contact with the heat sink such that heat from the LEDs is dissipated through the heat sink. In an embodiment, the second printed circuit board is adapted to accommodate a power and control circuitry for the LEDs, and is thermally insulated from the heat sink and from the first printed circuit board, and thus from the LED module. According to an aspect, the LEDs serve as the principal heat generating component on the printed circuit board, thus helping to increase the light output from the LEDs and/or increase the lifespan of the LED downlight lighting module.

Claims

1. An LED downlight lighting module comprising:

an LED module comprising one or more single LED(s) on a first printed circuit board;

a heat sink comprising a substantially hollow body, the substantially hollow body comprising a plurality of fins arranged within the substantially hollow body, wherein the substantially hollow body and the fins are formed from a material comprising a thermally conductive material and the first printed circuit board is in good thermal contact with the substantially hollow body such that heat from the LED(s) is dissipated through both the substantially hollow body and the fins; and

a second printed circuit board adapted to accommodate a power and control circuitry for the LED(s),

wherein the second printed circuit board is located within a driver box accommodated within one of a void and a recess in the substantially hollow body, and wherein the driver box is thermally insulated from the substantially hollow body of the heat sink and from the first printed circuit board, and thus from the LED(s), wherein the substantially hollow body takes the form of a substantially frustoconical shape closed at or near its narrower end by a rear wall having a front face and a rear face.

2. The LED downlight lighting module of claim 1, wherein the second printed circuit board comprises a glass-reinforced epoxy laminate sheet.

3. The LED downlight lighting module of claim 1, wherein the heat sink comprises aluminium.

4. The LED downlight lighting module of claim 1, further comprising a lens.

5. The LED downlight lighting module of claim 4, further comprising a lens cover.

6. The LED downlight lighting module of claim 1, further comprising a lamp cap fitting.

7. The LED downlight lighting module of claim 6, wherein the lamp cap fitting comprises a GU10 fitting.

8. The LED downlight lighting module of claim 7, wherein the second printed circuit board is accommodated within the GU10 fitting.

9. The LED downlight lighting module of claim 1, wherein the second printed circuit board further comprises a dimming circuitry for the LED(s).

10. The LED downlight lighting module of claim 1, wherein at least one of the first printed circuit board and the second printed circuit board comprises a metal printed circuit board.