Light emitting element lamp and lighting equipment

• US 8,384,275 B2
• Filed: 10/15/2008
• Issued: 02/26/2013
• Est. Priority Date: 10/16/2007
• Status: Active Grant

• Current Assignee: Toshiba Lighting & Technology Corporation (Toshiba Corporation)
• Original Assignee: Toshiba Lighting & Technology Corporation (Toshiba Corporation)
• Inventors: Tanaka, Toshiya, Osawa, Shigeru, Hisayasu, Takeshi
• Primary Examiner(s): Patel, Nimeshkumar
• Assistant Examiner(s): Hollweg, Thomas A
• Application Number:
  US12/738,081
• Publication Number:
  US 20100225220A1
• Time in Patent Office: 1,595 Days
• Field of Search: 313/498, 313/318.11, 313/46, 313/512, 362/362, 362/373
• 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 9/232 specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
• CPC Class Codes: F21K 9/233 specially adapted for generating a spot light distribution, e.g. for substitution of reflector lamps
• CPC Class Codes: F21K 9/238 Arrangement or mounting of circuit elements integrated in the light source
• CPC Class Codes: F21V 19/0035 the fastening means being capable of simultaneously attaching of an other part, e.g. a housing portion or an optical component
• CPC Class Codes: F21V 19/0055 by screwing
• 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 29/503 of light sources cooling arrangements structurally associated with gas-discharge or vapour-discharge lamps H01J61/52; cooling arrangements structurally associated with electric incandescent lamps H01K1/58; cooling arrangements structurally associated with light-emitting diodes H01L33/64
• CPC Class Codes: F21V 29/505 of reflectors
• CPC Class Codes: F21V 29/507 of means for protecting lighting devices from damage, e.g. housings
• CPC Class Codes: F21V 31/005 Sealing arrangements therefor
• CPC Class Codes: F21V 7/00 Reflectors for light sources characterised by cooling arrangements F21V29/505
• CPC Class Codes: F21Y 2105/16 square or rectangular, e.g. for light panels
• CPC Class Codes: F21Y 2105/18 annular; polygonal other than square or rectangular, e.g. for spotlights or for generating an axially symmetrical light beam
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

An object of the present invention is to provide a light emitting element lamp and a lighting equipment effectively suppressing a temperature rising of a substrate on which a light emitting element is mounted by using a reflector. The present invention provides a light emitting element lamp 1 including: a heat-conductive reflector 2 having an emission opening portion and formed to be widened toward the emission opening portion with a reflecting surface 2a being provided on an inner surface side and an outer peripheral surface being exposed to an outside; a base 4 connected to the reflector 2 via a cover 3; a heat-conductive heat radiating member 8 provided on an inner peripheral surface of the reflector 2 and thermally connected to the reflector 2; a substrate 7 having a light emitting element 6 mounted thereon and attached to the heat radiating member 8 with a substrate surface being thermally connected to the heat radiating member 8 in a surface contact state; a lighting circuit 9 housed in the cover 3 to light the light emitting element 6; and a translucent cover 5 for covering the emission opening portion 2c of the reflector 2.

Claims

1. A light emitting element lamp comprising:

a heat conductor provided, at one end side, with an emission opening portion, and at another end side, with an inside flat heat radiating member and a recessed portion on a back surface side of the heat radiating member, the heat conductor being formed to be widened toward the emission opening portion from the another end side, and having a reflector provided on an inside surface, a peripheral surface of the heat conductor being exposed to an outside, the heat-conductor and the heat radiating member being integrated so as to form a tubular shape;

a cover portion formed of a metal material into a tubular shape and having a one side attached to the another end side of the heat conductor so as to be connected to the recessed portion of the heat conductor and having a base on another end side, the recessed portion being formed inside the cover portion;

one single print substrate provided with a plurality of light emitting elements and attached to the heat radiating member with a substrate surface being thermally connected to the inside flat surface of the heat radiating member in a face to face surface contact state, wherein all of the light emitting elements in the lamp are disposed on the one single print substrate;

an insulating protection tube accommodated inside the recessed portion; and

a lighting circuit housed inside the insulating protection tube accommodated in the recessed portion in a space formed in the cover portion and the recessed portion in a manner apart from the back surface of the heat radiating member of the heat conductor so as to light the plurality of light emitting elements.

2. A lighting equipment comprising:

an equipment body provided with a socket; and

a light emitting element lamp according to claim 1 to be mounted to the socket of the equipment body.

3. The light emitting element lamp according to claim 1, wherein the inside flat heat radiating member contacts with the heat conductor in a surface contact state.

4. The light emitting element lamp according to claim 1, wherein a circuit board of the lighting circuit is disposed parallel to a longitudinal axis of the lamp in the space formed in the cover portion and the recessed portion.

5. The light emitting element lamp according to claim 1, wherein the lighting circuit is housed in a space defined by the base, the cover, and the recessed portion.

6. The light emitting element lamp according to claim 1, wherein the reflecting surface extends from the another end side toward the emission opening portion of the inside of the heal conductor.

7. The light emitting element lamp according to claim 1, further comprising a filling material disposed inside the insulating protection tube accommodated in the recessed portion so as to substantially cover the lighting circuit.

8. The light emitting element lamp according to claim 7, wherein the cover portion further comprises an air outlet configured to release pressure inside the cover.