LED light bulbs

Patent metadata

Field	Value
Publication number	US-10107487-B2
Application number	US-201514718262-A
Country	US
Kind code	B2
Filing date	May 21, 2015
Priority date	Jun 8, 2010
Publication date	Oct 23, 2018
Grant date	Oct 23, 2018

Abstract

LED light bulbs include openings in base or cover portions, and optional forced flow elements, for convective cooling. Thermally conductive optically transmissive material may be used for cooling, optionally including fins. A LED light engine may be fabricated from a substrate via planar fabrication techniques and shaped to form a substantially rigid upright support structure. Mechanical, electrical, and thermal connections may be made between a LED light engine and a LED light bulb.

First claim

What is claimed is:

1. A light emitting diode (LED) light bulb comprising:
a base end including a plurality of electrical contacts arranged to mate with an electrical receptacle to receive electric current;
a distal end arranged distal from the base end;
a plurality of LEDs; and
a circuit board arranged to support the plurality of LEDs between the base end and the distal end, wherein the circuit board is in electrical communication with the plurality of LEDs and a coating comprising an electrically insulating material disposed over the circuit board, and wherein the plurality of LEDs is mounted to the circuit board.

2. The LED light bulb of claim 1 , further comprising a cover comprising a light-transmissive material and defining an interior volume, wherein the plurality of LEDs and at least a portion of the circuit board are arranged within the interior volume.

3. The LED light bulb of claim 2 , further comprising a plurality of openings defined in the cover to enable air or other fluid to flow between the interior volume and an ambient environment.

4. The LED light bulb of claim 3 , further comprising an electrically activated fluid circulation element arranged to circulate air or other fluid to flow through the plurality of openings.

5. The LED light bulb of claim 3 , further comprising at least one baffle disposed proximate to at least one opening of the plurality of openings and configured to prevent unobstructed visibility of the plurality of LEDs through the at least one opening.

6. The LED light bulb of claim 5 , wherein the cover and the at least one baffle are arranged to diffuse light emissions of the plurality of LEDs.

7. The LED light bulb of claim 1 , wherein the circuit board comprises a plurality of non-coplanar support surfaces, wherein different LEDs of the plurality of LEDs are arranged on different surfaces of the plurality of non-coplanar support surfaces.

8. The LED light bulb of claim 7 , wherein the different surfaces of the plurality of non-coplanar support surfaces are oriented at least 90 degrees apart from one another.

9. The LED light bulb of claim 1 , wherein at least one LED drive control element or at least one LED control circuit is mounted to the circuit board.

10. The LED light bulb of claim 1 , wherein the circuit board comprises a metal core printed circuit board.

11. A light emitting diode (LED) light bulb comprising:
a cover defining an interior volume, the cover comprising a light-transmissive material;
a substantially rigid support element comprising a plurality of bends and a plurality of non-coplanar support surfaces connected by the plurality of bends;
a plurality of LEDs mounted to the plurality of non-coplanar support surfaces and arranged within the interior volume, wherein different LEDs of the plurality of LEDs are arranged on different surfaces of the plurality of non-coplanar support surfaces; and
at least one LED drive circuit or at least one LED control circuit arranged on at least one surface of the plurality of non-coplanar support surfaces, wherein the at least one LED drive circuit or the at least one LED control circuit comprises at least one of the following elements: a driver circuit, a ballast circuit, a dimmer circuit, a voltage control circuit, a current control circuit, a color control circuit, an electrostatic discharge element, a sensor, a sensory feedback circuit, or a temperature protection circuit.

12. The LED light bulb of claim 11 , wherein the at least one surface is oriented along or parallel to a longitudinal axis of the LED light bulb.

13. The LED light bulb of claim 11 , wherein the different surfaces of the plurality of non-coplanar support surfaces are oriented at least 90 degrees apart from one another.

14. The LED light bulb of claim 11 , wherein the plurality of non-coplanar support surfaces comprises at least one printed circuit board, and the plurality of LEDs in addition to the at least one LED drive circuit or the at least one LED control circuit are mounted to the at least one printed circuit board.

15. The LED light bulb of claim 11 , wherein surfaces of the plurality of non-coplanar support surfaces to which the plurality of LEDs is mounted are coated or covered with an electrically insulating material.

16. The LED light bulb of claim 11 , wherein a plurality of openings are defined in the light-transmissive material of the cover to enable air or other fluid to flow between the interior volume and an ambient environment.

17. The LED light bulb of claim 16 , comprising at least one baffle disposed within or partially bounding the interior volume and configured to prevent unobstructed visibility of at least one LED of the plurality of LEDs through at least one opening of the plurality of openings.

18. The LED light bulb of claim 17 , wherein the at least one baffle and the cover are arranged to diffuse light emissions of the plurality of LEDs.

19. The LED light bulb of claim 11 , wherein the support element further comprises at least one opposing surface that opposes at least one support surface of the plurality of non-coplanar support surfaces, and the at least one LED drive circuit or the at least one LED control circuit is arranged on the at least one opposing surface.

20. A light emitting diode (LED) light bulb comprising:
a cover defining an interior volume, the cover comprising a light-transmissive material defining a plurality of openings to enable air or other fluid to flow between the interior volume and an ambient environment;
a substantially rigid support element comprising a plurality of non-coplanar support surfaces;
a plurality of LEDs mounted to the plurality of non-coplanar support surfaces and arranged within the interior volume;
at least one LED drive circuit element or at least one LED control circuit element arranged on at least one surface of the plurality of non-coplanar support surfaces; and
at least one baffle disposed within or partially bounding the interior volume and configured to prevent unobstructed visibility of at least one LED of the plurality of LEDs through at least one opening of the plurality of openings.

21. The LED light bulb of claim 20 , wherein the at least one baffle and the cover are arranged to diffuse light emissions of the plurality of LEDs.

Assignees

• Cree Inc

Inventors

• Brandes George R
• Garceran Julio A

Classifications

• F21V29/70 Primary

  characterised by passive heat-dissipating elements, e.g. heat-sinks · CPC title

• F21V3/12

  the coatings comprising photoluminescent substances · CPC title

• F21V29/507

  of means for protecting lighting devices from damage, e.g. housings · CPC title

• F21Y2115/30

  Semiconductor lasers · CPC title

• F21Y2107/40

  on the sides of polyhedrons, e.g. cubes or pyramids · CPC title