Light assembly having a control circuit in a base

• US 9,702,535 B2
• Filed: 03/25/2015
• Issued: 07/11/2017
• Est. Priority Date: 06/24/2009
• Status: Expired

• Current Assignee: Elumigen Llc
• Original Assignee: Elumigen Llc
• Inventors: Dassanayake, Mahendra
• Primary Examiner(s): NEILS, PEGGY A
• Application Number:
  US14/667,791
• Publication Number:
  US 20150198315A1
• Time in Patent Office: 839 Days
• 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 9/64 using wavelength conversion means distinct or spaced from the light-generating element, e.g. a remote phosphor layer
• CPC Class Codes: F21V 13/08 the elements being filters or photoluminescent elements and reflectors
• CPC Class Codes: F21V 23/009 the casing being inside the housing of the lighting device
• CPC Class Codes: F21V 29/70 characterised by passive heat-dissipating elements, e.g. heat-sinks
• CPC Class Codes: F21V 29/75 with fins or blades having different shapes, thicknesses or spacing
• CPC Class Codes: F21V 29/767 the planes containing the fins or blades having directions perpendicular to the light emitting axis
• CPC Class Codes: F21V 3/00 Globes; Bowls; Cover glasses with refracting properties F21V5/00; with reflecting properties F21V7/00; characterised by cooling arrangements F21V29/506
• CPC Class Codes: F21V 3/02 characterised by the shape
• CPC Class Codes: F21V 7/0025 Combination of two or more reflectors for a single light source array of reflectors for a cluster of light sources F21V7/0083
• CPC Class Codes: F21V 7/06 with parabolic curvature
• CPC Class Codes: F21V 7/08 with elliptical curvature
• CPC Class Codes: F21V 7/28 characterised by coatings
• CPC Class Codes: F21V 9/06 for filtering out ultraviolet radiation
• 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: F21V 9/30 Elements containing photoluminescent material distinct from or spaced from the light source shades F21V1/17; globes, bowls or cover glasses F21V3/08, F21V3/12; refractors F21V5/10; reflectors F21V7/26, F21V7/30; elements with provision for controlling the spectral properties or intensity F21V9/40
• CPC Class Codes: F21V 9/35 at focal points, e.g. of refractors, lenses, reflectors or arrays of light sources
• CPC Class Codes: F21Y 2103/33 annular
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

A light assembly that includes a cover, a housing coupled to the cover, and a lamp base coupled to the cover. The light assembly also includes a first circuit board disposed within the housing. The first circuit board has a plurality of light sources thereon. A heat sink is thermally coupled to the light sources and is disposed within the housing. The heat sink includes openings therethrough. Each of the outer edges is in contact with the housing. The light assembly also includes an elongated control circuit board assembly electrically coupled to the light sources of the first circuit board and the lamp base. The control circuit board extends through the openings. The control circuit board has a plurality of electrical components thereon for controlling the light sources.

Claims

1. A light assembly comprising:

an electrically conductive base defining a volume between a bottom portion and a side wall, said side wall comprising threads;

a housing coupled to the base;

a cover coupled to the housing;

a plurality of light sources coupled to and within the housing, said light sources generating light; and

a control circuit disposed on a first circuit board electrically coupled to the light sources for driving the light sources, said first circuit board housed entirely within the volume defined within the base and adjacent to the threads, said circuit board comprising a first electrical contact disposed on an edge thereof;

said electrically conductive base comprising a second electrical contact disposed on the side wall forming a groove for receiving the first electrical contact with an interference fit.

2. A light assembly as recited in claim 1 wherein the control circuit is encapsulated within the base.

3. A light assembly as recited in claim 1 further comprising a second circuit board disposed within the housing therein, said second circuit board having the plurality of light sources thereon, said first circuit board electrically coupled to the second circuit board.

4. A light assembly as recited in claim 1 further comprising a heat sink thermally coupled to the plurality of light sources.

5. A light assembly as recited in claim 1 wherein the plurality of light sources are disposed in a ring around a longitudinal axis.

6. A light assembly as recited in claim 1 wherein the plurality of light sources are solid state light sources.

7. A light assembly as recited in claim 1 wherein the first circuit board is received within a pair of grooves formed within the electrically conductive base, wherein said pair of grooves are electrically coupled to an outside of the base, said pair of grooves coupling to a pair of edge contacts disposed on the first circuit board.

8. A light assembly as recited in claim 7 wherein the first circuit board is electrically coupled to a bottom contact of the base, wherein the pair of grooves have an opposite polarity to the bottom contact.

9. A light assembly as recited in claim 1 wherein the control circuit comprises a light source driver circuit.