SOLID-STATE LIGHT BULB HAVING ION WIND FAN AND INTERNAL HEAT SINKS

• US 20110037367A1
• Filed: 06/18/2010
• Published: 02/17/2011
• Est. Priority Date: 08/11/2009
• Status: Abandoned Application

• Current Assignee: Ventiva, Inc.
• Original Assignee: Ventiva, Inc.
• Inventors: WANG, Wei-Min Jeff, Schlitz, Daniel Jon, Gooch, Scott L., Choudhary, Ashwini
• Application Number:
  US12/818,921
• Publication Number:
  US 20110037367A1
• Time in Patent Office: Days
• US Class Current: 313/46
• CPC Class Codes: F21K 9/232 specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
• CPC Class Codes: F21V 29/63 using electrically-powered vibrating means; using ionic wind
• CPC Class Codes: F21V 29/677 the fans being used for discharging
• CPC Class Codes: F21V 29/71 using a combination of separate elements interconnected by heat-conducting means, e.g. with heat pipes or thermally conductive bars between separate heat-sink elements
• CPC Class Codes: F21V 29/763 the planes containing the fins or blades having the direction of the light emitting axis
• 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: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

An ion wind fan can be incorporated into a solid-state lighting device to thermally manage the lighting device. In one embodiment, the lighting device includes a bulb body having air intake and exhaust openings, and an ion wind fan to generate airflow between the openings. The lighting device can further include an upstream heat sink disposed upstream of the ion wind fan with respect to the airflow, the upstream heat sink having a shape that provides no direct line of sight from the air intake openings to the ion wind fan.

Claims

1. A lighting device comprising:

a bulb body;

a bulb cover attached to the bulb body;

a heat spreader attached to the bulb body, where the bulb cover and the heat spreader define a bulb cavity;

one or more solid-state light devices attached to a first surface of the heat spreader, the first surface of the heat spreader being inside the bulb cavity;

a first heat sink thermally coupled to a second surface of the heat spreader, the second surface of the heat spreader being outside of the bulb cavity;

a second heat sink thermally coupled to the second surface of the heat spreader; and

an ion wind fan disposed to generate an airflow that impinges on the first heat sink and the second heat sink.

2. The lighting device of claim 1, wherein the ion wind fan is located between the first heat sink and the second heat.

3. The lighting device of claim 1, further comprising a base attached to the bulb body, the base configured to electrically connect the lighting device to a power source, wherein the a base in combination with the bulb body and the bulb cover have the approximate shape of A-style bulb.

4. The lighting device of claim 1, wherein the bulb body comprises a plurality of air passage openings.

5. The lighting device of claim 1, wherein the lighting device has a longitudinal axis extending form the center of the base to the center of the bulb cover, and the airflow generated by the ion wind fan is perpendicular to the longitudinal axis of the lighting device.

6. The lighting device of claim 1, wherein the first heat sink and the second heat sink comprise fin-stack type heat sinks.

7. The lighting device of claim 6, wherein the first heat sink and the second heat sink comprise a plurality of V-shaped fins.

8. The lighting device of claim 6, wherein the first heat sink and the second heat sink are oriented in opposite directions with respect to each other.

9. The lighting device of claim 6, wherein the first heat sink and the second heat sink comprise a plurality of bent fins.

10. The lighting device of claim 1, wherein the one or more solid-state light devices comprise light-emitting diodes (LEDs).

11. A lighting device comprising:

a bulb body having one or more air intake openings and a one or more air exhaust openings;

an ion wind fan capable of generating an airflow from the air intake openings toward the air exhaust opening, the ion wind fan being located inside the bulb body; and

an upstream heat sink disposed upstream of the ion wind fan with respect to the airflow, the upstream heat sink having a shape that provides no direct line of sight from the air intake openings to the ion wind fan.

12. The lighting device of claim 11, further comprising a downstream heat sink disposed downstream of the ion wind fan with respect to the airflow, the downstream heat sink having a shape that provides no direct line of sight from the air exhaust openings to the ion wind fan.

13. The lighting device of claim 12, wherein the upstream and downstream heat sinks comprise V-shaped fin stacks.

14. The lighting device of claim 13, wherein the V-shapes of the upstream and downstream heat sinks are oriented in opposing directions.

15. The lighting device of claim 11, wherein the one or more solid-state light devices comprise light-emitting diodes (LEDs).

16. A consumer electronics device comprising:

a body having one or more air passage openings to allow ambient air into the body of the consumer electronics device;

an ion wind fan to create an air flow through the one or more air passage openings; and

a heat sink located between the one or more air passage openings and the ion wind fan, the heat sink having a shape that prevents at least one object that fits through the one or more air passage openings from being able to contact the ion wind fan.

17. The consumer electronics device of claim 16, wherein the heat sink comprises a plurality of heat sink fins, each heat sink fin being bent to form non-straight air passage channels.

18. The consumer electronics device of claim 17, wherein each heat sink fin is bent at an angle to form substantially V-shaped air passage channels.

19. The consumer electronics device of claim 17, wherein each heat sink fin is bent in a curve to form curved air passage channels.

20. A consumer electronics device comprising:

an ion wind fan to generate an airflow;

a first heat sink positioned upstream of the ion wind fan with respect to the airflow, wherein the airflow is heated by impinging on the first heat sink; and

a second heat sink positioned downstream of the ion wind fan with respect to the airflow, wherein the heated airflow impinges on the second heat sink.

21. The consumer electronics device of claim 20, wherein the ion wind fan generates less ozone due to the heated air received from the first heat sink.

22. The consumer electronics device of claim 20, further comprising an external shell having one or more air intake openings, wherein the first heat sink is shaped in a manner that protects the ion wind fan from objects inserted through an air intake opening.