LED-based light bulb

Patent metadata

Field	Value
Publication number	US-9944519-B2
Application number	US-201213424835-A
Country	US
Kind code	B2
Filing date	Mar 20, 2012
Priority date	May 5, 2003
Publication date	Apr 17, 2018
Grant date	Apr 17, 2018

Abstract

A light source ( 10 ) comprises a light engine ( 16 ), a base ( 24 ), a power conversion circuit ( 30 ) and an enclosure ( 22 ). The light engine ( 16 ) comprises at least one LED ( 12 ) disposed on a platform ( 14 ). The platform ( 14 ) is adapted to directly mate with the base ( 24 ) which a standard incandescent bulb light base. Phosphor ( 44 ) receives the light generated by the at least one LED ( 12 ) and converts it to visible light. The enclosure ( 22 ) has a shape of a standard incandescent lamp.

First claim

The invention claimed is:

1. A light source comprising:
a light engine comprising a printed circuit board and including at least one LED;
a light transparent or translucent enclosure fitted over at least a portion of the light engine;
an index matching and thermal spreading material in the enclosure and in direct physical contact with the at least one LED, said material consisting of a liquid;
a base for supporting the light engine, enclosure and a heat sink in operative arrangement; and
a conversion circuit housed in at least a portion of the base for supplying electric power to the light engine.

2. The light source of claim 1 , wherein the liquid material comprises a lens.

3. The light source of claim 1 , wherein the enclosure is one of a bulb, spherical, elliptical, cylindrical, domed, squared, and n-sided shaped.

4. The light source of claim 1 , wherein the base is one of a screw base and wedge base.

5. The light source of claim 1 , wherein the heat sink is in thermal communication with the light engine and comprises i) a slug portion and ii) a plurality of radially extending fins disposed about the outer periphery of the slug portion and external to the light source to transfer heat from the light engine into ambient air external to the light source.

6. The light source of claim 1 , wherein the base comprises an active cooling unit for dissipating thermal energy away from the at least one LED.

7. The light source of claim 6 , wherein the active cooling unit includes at least one of thermoelectric cooling, piezo synthetic jets, piezo fans and electric fans.

8. The light source of claim 1 wherein said light engine comprises a plurality of LEDs and all LEDs of the light engine reside in a common plane.

9. The light source of claim 1 wherein said conversion circuit is in electrical communication with a voltage source.

Assignees

• Bohler Christopher L
• Kolodin Boris
• Radkov Emil
• Aanegola Srinath K
• Weaver Jr Stanton E
• Petroski James T
• Brown Zena
• Ge Lighting Solutions Llc

Inventors

• Bohler Christopher L
• Kolodin Boris
• Radkov Emil
• Aanegola Srinath K
• Weaver Jr Stanton E
• Petroski James T
• Brown Zena

Classifications

• F21V3/00

  Globes; Bowls; Cover glasses (with refracting properties F21V5/00; with reflecting properties F21V7/00; characterised by cooling arrangements F21V29/506) · CPC title

• F21V29/63

  using electrically-powered vibrating means; using ionic wind · CPC title

• F21Y2105/18

  annular; polygonal other than square or rectangular, e.g. for spotlights or for generating an axially symmetrical light beam · CPC title

• F21V29/67

  characterised by the arrangement of fans · CPC title

• F21V3/02

  characterised by the shape · CPC title