Bulb-shaped led lamp and compact led lamp

• US 20100002444A1
• Filed: 09/19/2007
• Published: 01/07/2010
• Est. Priority Date: 09/20/2006
• Status: Active Grant

• Current Assignee: LEDVANCE GmbH (MLS Co. Ltd.)
• Original Assignee: OSRAM GmbH (Ams-Osram AG)
• Inventors: Konaka, Daijiro
• Granted Patent: US 8,529,095 B2
• Time in Patent Office: Days
• US Class Current: 362/294
• 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 9/61 using light guides
• CPC Class Codes: F21V 23/00 Arrangement of electric circuit elements in or on lighting devices characterised by cooling arrangements F21V29/508
• CPC Class Codes: F21V 29/507 of means for protecting lighting devices from damage, e.g. housings
• CPC Class Codes: F21V 29/70 characterised by passive heat-dissipating elements, e.g. heat-sinks
• CPC Class Codes: F21V 29/89 Metals
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

A bulb-shaped LED lamp includes a plurality of high-intensity LED modules 2 where a high-intensity LED is attached on an LED fixing base plate, a heat sink 5 where the high-intensity LED modules 2 are attached on an end face in an axial direction thereof along a circumferential direction, for performing radiation of the high-intensity LED modules 2, a reflector 4 which is provided so as to surround the plurality of high-intensity LED modules 2, for guiding light from the high-intensity LED modules 2 forward, an electronic circuit for driving 6 which drives the high-intensity LED modules 2, a housing 7 which houses the heat sink 5, the electronic circuit for driving 6, and a portion of the reflector 4 therein, and a globe 8 which configures an outer shell together with the housing 7.

Claims

1. A bulb-shaped LED lamp comprising:

a plurality of high-intensity LED modules where a high-intensity LED is attached on an LED fixing base plate;

a heat sink where the high-intensity LED modules are attached on an end face in an axial direction thereof along a circumferential direction, for performing radiation of the high-intensity LED modules;

a reflector which is provided so as to surround the plurality of high-intensity LED modules, for guiding light from the high-intensity LED modules forward;

an electronic circuit for driving which drives the high-intensity LED modules;

a housing which houses the heat sink, the electronic circuit for driving, a portion of the reflector therein; and

a globe which configures an outer shell together with the housing.

2. The bulb-shaped LED lamp according to claim 1, wherein a diffusion sheet is used as the reflector.

3. A bulb-shaped LED lamp comprising:

a plurality of high-intensity LED modules where a high-intensity LED is attached on an LED fixing base plate, each being provided around a high-intensity LED with a reflecting plate for guiding light forward;

a heat sink where the high-intensity LED modules are attached on an end face in an axial direction thereof along a circumferential direction, for performing radiation of the high-intensity LED modules;

an electronic circuit for driving which drives the high-intensity LED modules;

a housing which houses the heat sink and the electronic circuit for driving therein; and

a glass globe which configures an outer shell together with the housing.

4. A compact LED lamp comprising:

a plurality of high-intensity LED modules where a high-intensity LED is attached on an LED fixing base plate;

a heat sink where the high-intensity LED modules are attached on an end face in an axial direction thereof along a circumferential direction, for performing radiation of the high-intensity LED modules;

a reflector which is provided so as to surround the plurality of high-intensity LED modules, for guiding light from the high-intensity LED modules forward;

a resin light-guiding blade member having the same number of blades as the number of high-intensity LED modules, where the blades are provided radially in a diametrical direction at approximately equal intervals, the blades have predetermined heights in the axial direction, and the respective blades are fixed on the high-intensity LED modules;

an electronic circuit for driving which drives the high-intensity LED modules; and

a housing which houses the heat sink, the electronic circuit for driving, a portion of the reflector therein.