SELF-BALLASTED LAMP

• US 20100026185A1
• Filed: 07/29/2009
• Published: 02/04/2010
• Est. Priority Date: 07/31/2008
• Status: Active Grant

• Current Assignee: Toshiba Lighting & Technology Corporation (Toshiba Corporation)
• Original Assignee: Toshiba Lighting & Technology Corporation (Toshiba Corporation)
• Inventors: Tamai, Hiroki, Shibano, Nobuo, Betsuda, Nobuhiko, Bessho, Makoto, Saito, Akiko, Kawano, Hitoshi, Shimizu, Keiichi, Shibahara, Yusuke, Suwa, Takumi
• Granted Patent: US 8,427,059 B2
• Time in Patent Office: Days
• US Class Current: 315/32
• 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 23/0492 the sensor detecting a change in orientation, a movement or an acceleration of the lighting device, e.g. a tilt switch
• CPC Class Codes: F21V 29/67 characterised by the arrangement of fans
• 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 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: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

A substrate is attached to one edge side of a radiator and a globe is attached covering the substrate. Heat-radiating fins are provided on the other edge side of the radiator and an air-cooling unit is rotatably provided inside the heat-radiating fins which enables to freely rotate. A case storing a circuit part is attached to the other edge side of the radiator and a cap is provided to the case. By the wind blast from the air-cooling unit, the heat-radiating fins are caused to be a part of the ventilation path to allow for ventilation of the inside of the radiator.

Claims

1. A self-ballasted lamp including:

a substrate having a one edge side surface on which a light emitting element is provided;

a radiator to which one edge of the other edge side surface of the substrate is attached;

a globe which covers the substrate and is attached to the one edge of the radiator;

a cap provided on the other edge side of the radiator;

a lighting circuit stored between the radiator and the cap and is for lighting the light emitting element; and

an air-cooling unit which is rotatably provided on the other edge side of the radiator and allows for ventilation of the inside of the radiator.

2. The self-ballasted lamp according to claim 1, wherein;

a substrate communication hole for communicating the one edge side surface of the substrate with the other edge side surface is provided to the substrate,

a radiator communication hole for communicating the one edge side with the other edge side is provided to the radiator at a position that communicates with the substrate communication hole, and

a ventilation hole communicating the inner side space covered with the globe with the outside is provided to at least either the radiator or the globe.

3. The self-ballasted lamp according to claim 1, wherein the radiator is formed of a resin material.

4. The self-ballasted lamp according to claim 1, wherein;

the radiator includes a storage part where the air-cooling unit is stored inside, and

a drive circuit which is provided to the substrate for driving the air-cooling unit.

5. The self-ballasted lamp according to claim 4, wherein;

the air-cooling unit includes a fan provided so as to face the other edge side of the substrate, and

a motor provided between the fan and the substrate to be attached at least to either the substrate or the radiator and driven by the drive circuit to rotation-drive the fan.

6. The self-ballasted lamp according to claim 4, wherein

the drive circuit is provided on the one edge side of the substrate.