SELF-BALLASTED LAMP AND LIGHTING EQUIPMENT

• US 20110074290A1
• Filed: 09/20/2010
• Published: 03/31/2011
• Est. Priority Date: 09/25/2009
• Status: Active Grant

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation), Toshiba Lighting & Technology Corporation (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation), Toshiba Lighting & Technology Corporation (Toshiba Corporation)
• Inventors: SAKAI, MAKOTO, Watanabe, Miho, Shibano, Nubuo, Tanaka, Toshiya, Nishimura, Kiyoshi, Matsuda, Shuhei, Segawa, Masao, Ogawa, Kozo, Kamata, Masahiko
• Granted Patent: US 8,678,618 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 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;

a light-emitting module which 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 in which the light-emitting portions are respectively disposed at least on a circumferential surface of the support portion;

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

a light transmissive member interposed between the light-emitting module and an inner face of the globe;

a cap provided at the other end side of the base body; and

a lighting circuit housed between the base body and the cap.

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

the distance between the light-emitting portion of the light-emitting module and the inner face of the globe is 2 mm or less.

3. The self-ballasted lamp according to claim 1, further comprising an insulating unit interposed between the light-emitting module and the lighting circuit.

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

the base body has a partitioning wall portion interposed between the insulating unit and the lighting circuit and a heat radiating portion exposed to the outside.

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

the insulating unit has a thermal conductivity of 0.1 W/mk or less.

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

the light-transmissive member is made of silicone resin in which light-diffusing materials are dispersed.

7. 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.