Self-ballasted lamp and lighting equipment having a support portion in contact with an inner circumference of a base body

• US 8,998,457 B2
• Filed: 01/31/2014
• Issued: 04/07/2015
• Est. Priority Date: 09/25/2009
• Status: Active Grant

• Current Assignee: Toshiba Lighting & Technology Corporation (Toshiba Corporation)
• Original Assignee: Toshiba Lighting & Technology Corporation (Toshiba Corporation)
• Inventors: Sakai, Makoto, Segawa, Masao, Shibano, Nobuo, Nishimura, Kiyoshi, Ogawa, Kozo, Kamata, Masahiko, Tanaka, Toshiya, Watanabe, Miho, Matsuda, Shuhei
• Primary Examiner(s): MAY, ROBERT J
• Application Number:
  US14/170,130
• Publication Number:
  US 20140145590A1
• Time in Patent Office: 431 Days
• Field of Search: 362/294, 362/373, 362/311.02, 362/267, 36224902-24903, 362/249.04, 362/249.16, 362/363
• US Class Current: 362/363
• 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 29/506 of globes, bowls or cover glasses
• CPC Class Codes: F21V 29/507 of means for protecting lighting devices from damage, e.g. housings
• CPC Class Codes: F21V 29/89 Metals
• CPC Class Codes: F21V 3/04 characterised by materials, surface treatments or coatings
• CPC Class Codes: F21Y 2107/00 Light sources with three-dimensionally disposed light-generating elements
• CPC Class Codes: F21Y 2107/40 on the sides of polyhedrons, e.g. cubes or pyramids
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

A self-ballasted lamp includes: a base body; a light-emitting module and a globe which are provided at one end side of the base body; a cap provided at the other end side of the base body; and a lighting circuit housed between the base body and the cap. The light-emitting module has light-emitting portions each using a semiconductor light-emitting element, and a support portion projected at one end side of the base body, and the light-emitting portions are disposed at least on a circumferential surface of the support portion. A light-transmissive member is interposed between the light-emitting module and an inner face of the globe.

Claims

1. A self-ballasted lamp comprising:

a base body including a side wall having an opening portion at one end and an opening portion at the other end which has a smaller diameter than that of the opening portion at the one end, wherein the side wall is provided with a first wall whose inner circumferential surface is parallel to a lamp axis and a second wall whose inner diameter decreases from the first wall toward the other end of the side wall;

a cover disposed inside the base body, projecting from the other end of the side wall of the base body and made an insulating material;

a support portion including an attachment portion at an outer circumferential surface thereof, the outer circumferential surface of the attachment portion coming into contact with the inner circumferential surface of the first wall, and projected at the one end of the side wall of the base body;

a light-emitting module configured to have a substrate which includes a plurality of substrate portions integrally formed, wherein the plurality of substrate portions are formed along an outer face shape of the support portion, and connected to the outer face of the support portion, and a lighting portion having a semiconductor light-emitting element respectively disposed on the plurality of substrate portions;

a globe provided at the one end of the side wall of the base body so as to cover the light-emitting module;

a light-transmissive member filled so as to contact with the support portion, the substrate and the light emitting portion between the light-emitting module and an inner face of the globe;

a cap provided an end of the cover; and

a lighting circuit housed inside the base body and the cover.

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

the substrate is a three-dimensional shape along the shape of the globe.

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

the light-transmissive member is a transparent silicone resin, and is filled in the gap between the surface of the light-emitting module and the inner face of the globe with no air layer therebetween.

4. The self-ballasted lamp according to claim 1, further comprising a structure to prevent the heat of the light-emitting portion transmitted to the lighting circuit and is capable of suppressing the temperature rise of the lighting circuit.

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

at least part of the other end side of the attachment portion of the support portion comes into contact with the second wall.

6. Lighting equipment comprising:

an equipment body having a socket; and

the self-ballasted lamp according to claim 1 which is attached to the socket of the equipment body.