LIGHT-EMITTING ELEMENT LAMP AND LIGHTING EQUIPMENT

• US 20110089806A1
• Filed: 06/04/2009
• Published: 04/21/2011
• Est. Priority Date: 06/27/2008
• Status: Active Grant

• Current Assignee: Toshiba Lighting & Technology Corporation (Toshiba Corporation)
• Original Assignee: Toshiba Lighting & Technology Corporation (Toshiba Corporation)
• Inventors: Osawa, Shigeru, Suwa, Takumi, Hisayasu, Takeshi, Tanaka, Toshiya
• Granted Patent: US 8,294,356 B2
• Time in Patent Office: Days
• 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: F21K 9/68 Details of reflectors forming part of the light source
• CPC Class Codes: F21V 17/12 by screwing
• CPC Class Codes: F21V 21/30 Pivoted housings or frames
• CPC Class Codes: F21V 23/001 the elements being electrical wires or cables
• CPC Class Codes: F21V 23/006 the substrate being distinct from the light source holder
• CPC Class Codes: F21V 29/87 Organic material, e.g. filled polymer composites; Thermo-conductive additives or coatings therefor
• CPC Class Codes: F21V 31/005 Sealing arrangements therefor
• CPC Class Codes: F21V 31/04 Provision of filling media
• CPC Class Codes: F21V 7/0083 Array of reflectors for a cluster of light sources, e.g. arrangement of multiple light sources in one plane combination of two or more reflectors F21V7/0025
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
• CPC Class Codes: H01L 33/60 Reflective elements
• CPC Class Codes: H05B 45/30 Driver circuits
• CPC Class Codes: H05B 45/3574 Emulating the electrical or functional characteristics of incandescent lamps
• CPC Class Codes: Y02B 20/30 Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

Abstract

The present invention provides a light-emitting element lamp 1 capable of preventing a temperature rise of a substrate 9, on which light-emitting elements 4 are mounted, by effectively utilizing a thermally conductive casing 2 and a thermally conductive cover 5.

The light emitting element lamp 1 includes a thermally conductive casing 2, a light source part 3, a thermally conductive cover 5, and an insulative cover 6. The thermally conductive casing 2 includes an irradiation opening 2b, is formed so as to be widened toward the irradiation opening 2b, has its outer circumferential surface exposed outwardly, and has a substrate mounting part 2c secured on its inner circumferential surface. The light source part 3 has a substrate 9 having the light-emitting elements 4 mounted thereon and causes the substrate 9 to be thermally coupled to and attached to the substrate mounting part 2c of the thermally conductive casing 2. The thermally conductive cover 5 is thermally coupled to and connected to the outer circumferential surface of the thermally conductive casing 2 in a surface-contacted state. The insulative cover 6 has one end side thereof connected to the thermally conductive cover 5, and the cap 7 is connected to the other end side thereof. The lighting circuit 12 controls lighting of the light-emitting elements 4 accommodated in the insulative cover 6.

Claims

1. A light-emitting element lamp including:

a thermally conductive casing having an irradiation opening, which is formed so as to be widened toward the irradiation opening, having an outer circumferential surface exposed outwardly, and having a substrate mounting part equipped on the inner circumferential surface;

a light source part having a substrate having light-emitting elements mounted thereon, in which the substrate is attached so as to be thermally coupled to the substrate mounting part;

a thermally conductive cover which is thermally coupled to and connected to the outer circumferential surface of the thermally conductive casing in a surface-contacted state;

an insulative cover one end side of which is connected to the thermally conductive cover and the other end side of which has a cap connected thereto; and

a lighting circuit which is accommodated in the insulative cover and controls lighting of the light-emitting elements.

2. The light-emitting element lamp according to claim 1, wherein the thermally conductive casing and the thermally conductive cover are connected to each other with an O-ring intervening therebetween, and power is fed from the lighting circuit to the light source part inside the O-ring.

3. The light-emitting element lamp according to claim 1, wherein a plurality of light-emitting elements are mounted on the substrate, and a reflector is provided opposite to the substrate, and

the reflector includes a plurality of incidence openings corresponding to the plurality of light-emitting elements and a reflection surface which sections the incidence openings and is widened from the incidence openings toward the irradiation direction.

4. Lighting equipment including:

an equipment main body having a socket;

a light-emitting element lamp according to claim 1, which is mounted in the socket of the equipment main body.

5. The light-emitting element lamp according to claim 2, wherein a plurality of light-emitting elements are mounted on the substrate, and a reflector is provided opposite to the substrate, and

the reflector includes a plurality of incidence openings corresponding to the plurality of light-emitting elements and a reflection surface which sections the incidence openings and is widened from the incidence openings toward the irradiation direction.

6. Lighting equipment including:

an equipment main body having a socket;

a light-emitting element lamp according to claim 2, which is mounted in the socket of the equipment main body.