Lighting device having a through-hole and a groove portion formed in the thermally conductive main body

• US 8,760,042 B2
• Filed: 02/26/2010
• Issued: 06/24/2014
• Est. Priority Date: 02/27/2009
• Status: Expired due to Fees

• Current Assignee: Toshiba Lighting & Technology Corporation (Toshiba Corporation)
• Original Assignee: Toshiba Lighting & Technology Corporation (Toshiba Corporation)
• Inventors: Sakai, Makoto, Osawa, Shigeru, Shibahara, Yusuke, Hisayasu, Takeshi, Morikawa, Kazuto, Sanpei, Tomohiro, Takenaka, Erika
• Primary Examiner(s): Patel, Nimeshkumar
• Assistant Examiner(s): Stern, Jacob R
• Application Number:
  US12/713,230
• Publication Number:
  US 20100219735A1
• Time in Patent Office: 1,579 Days
• Field of Search: 313/324, 313/51, 313/46
• US Class Current: 313/46
• CPC Class Codes: F21K 9/23 Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
• CPC Class Codes: F21K 9/238 Arrangement or mounting of circuit elements integrated in the light source
• CPC Class Codes: F21V 23/002 Arrangements of cables or conductors inside a lighting device, e.g. means for guiding along parts of the housing or in a pivoting arm
• CPC Class Codes: F21V 23/006 the substrate being distinct from the light source holder
• CPC Class Codes: F21V 23/06 the elements being coupling devices , e.g. connectors
• 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 29/89 Metals
• 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 2113/13 comprising an assembly of point-like light sources
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: F21Y 2115/30 Semiconductor lasers

Abstract

A lighting device and a lighting fixture of the embodiment of the present invention comprises a thermally conductive main body having a substrate support portion in one end portion, and having a through-hole and a groove portion formed in the substrate support portion, the through-hole penetrating from the one end portion to the other end portion of the main body, the groove portion extending continuously from the through-hole, a substrate mounted with a semiconductor light-emitting device, and disposed on the substrate support portion, an electrical connector connected to the semiconductor light-emitting device, a power supply device housed in the main body and configured to light the semiconductor light-emitting device, a wire connected to the power supply device and to the electrical connector while being inserted through the through-hole and the groove portion, and a base member provided in the other end portion of the main body and connected to the power supply device. Therefore, a lighting device and a lighting fixture of this embodiment of the present invention reduced in size, is configured to be suitable for mass production and is capable of producing a certain luminous flux.

Claims

1. A lighting device comprising:

a thermally conductive main body having a substrate support portion in one end portion, and having a through-hole portion formed in the substrate support portion and a groove portion formed in the substrate support portion, the through-hole portion penetrating from the one end portion to the other end portion of the main body in a first direction, the groove portion extending continuously from the through-hole portion at one end of the groove portion in a second direction substantially perpendicular to the first direction to another end of the groove portion;

a substrate mounted with a semiconductor light-emitting device, and disposed on the substrate support portion of the main body;

an electrical connector disposed on one end portion of the substrate and connected to the semiconductor light-emitting device;

a power supply device housed in the main body and configured to light the semiconductor light-emitting device;

a wire having one end connected to the power supply device and the other end connected to the electrical connector while being inserted through the through-hole and the groove portion of the main body; and

a base member provided in the other end portion of the main body and connected to the power supply device;

wherein

a notch-shaped wire insertion portion is formed in a peripheral edge of the substrate;

the substrate is disposed on the substrate support portion of the main body in such a manner that the notched-shaped wire insertion portion faces the groove portion and the substrate covers the through-hole and the groove portion except at the other end of the groove portion; and

the wire is bent at the other end of the groove portion.

2. The lighting device according to claim 1, wherein the substrate support portion is formed as a stepped portion projecting to the one end portion side.

3. The lighting device according to claim 1. wherein the substrate is provided with a protecting member at least in a peripheral edge portion facing the wire, the protecting member having an electrical insulation property.

4. A lighting fixture comprising:

a fixture body provided with a socket; and

the lighting device according to claim 1 attached to the socket of the fixture body.

5. The lighting device according to claim 1, wherein the lighting device is any one of:

a bulb-type lighting device (A or PS type) which is similar to the shape of a common filament light bulb;

a spherical bulb-type lighting device (G type);

a cylindrical bulb-type lighting device (T type);

a reflector-shaped bulb-type lighting, device (R type); and

a globeless bulb-type lighting device.

6. The lighting device according to claim 1, wherein the semiconductor light-emitting device is a light-emitting-device using, as a light source, any one of a light-emitting diode and a semiconductor of a semiconductor laser.

7. The lighting device according to claim 1. wherein the semiconductor light-emitting device includes any one of a single device, a plurality of devices, a group of devices and a plurality of groups of devices.

8. The lighting device according to claim 1, wherein a part of or all of the semiconductor light-emitting devices are mounted in a certain regular pattern such as any one of a matrix, staggered, or radial arrangement pattern by using any one of surface mount device (SMD) type and chip on board (COB) technology.

9. The lighting device according to claim 1, wherein the semiconductor light-emitting device may include any one of a white, red, blue and green device, and any combination of the white, red, blue and green devices according to an application of the lighting fixture.

10. The lighting device, according to claim 1. wherein the main body is composed of a highly thermally conductive metallic material.

11. The lighting device according to claim 1, wherein the main body is composed of a material including at least one of:

aluminum (Al), copper (Cu), iron (Fe), nickel (Ni), aluminum nitride (AIN), silicon carbide (SiC), and a synthetic resin.

12. The lighting device according to claim 1, wherein the substrate support portion in the one end portion of the main body includes a flat surface on which the substrate mounted with the semiconductor light-emitting device is supported in close contact with the substrate support portion.

13. The lighting device according to claim 1, wherein the through-hole portion penetrating from the one end portion to the other end portion side in the substrate support portion is formed at an approximately central portion of the substrate support portion.

14. The lighting device according to claim 4, wherein the lighting fixture is any one of a ceiling flush type, a direct mounting type, a pendant type, and a wall mounting type.

15. The lighting device according to claim 1, wherein the through-hole portion penetrating from the one end portion to the other end portion side in the substrate support portion is formed at a position displaced from a central portion of the substrate support portion outward in a radial direction.

16. The lighting device according to claim 1, wherein the groove portion extending continuously from the through-hole portion is formed as an approximately linear groove extending from the through-hole portion outward in a radial direction of the substrate support portion.

17. The lighting device according to claim 1, wherein the groove portion extending continuously from the through-hole portion is formed as a curved groove extending in a rotational direction about the through-hole.

18. The lighting device according to claim 1, wherein the substrate is composed of a material including at least one of:

aluminum, copper, stainless steel, synthetic resin, glass epoxy material, and paper phenol material.

19. The lighting device according, to claim 1, wherein the substrate is formed in any one of a polygonal shape and an elliptical shape.

20. The lighting device according to claim 1, wherein the electrical connector is disposed on the one end portion of the substrate near the notched-shaped wire insertion portion.

21. The lighting device according to claim 1, wherein the wire is pulled out of the one end portion of the substrate from the groove portion and the notched shaped wire insertion portion and bent back.