Bulb-shaped LED lamp and compact LED lamp

• US 8,529,095 B2
• Filed: 09/19/2007
• Issued: 09/10/2013
• Est. Priority Date: 09/20/2006
• Status: Expired due to Fees

• Current Assignee: LEDVANCE GmbH (MLS Co. Ltd.)
• Original Assignee: OSRAM GmbH (Ams-Osram AG)
• Inventors: Konaka, Daijiro
• Primary Examiner(s): McManmon, Mary
• Application Number:
  US12/311,124
• Publication Number:
  US 20100002444A1
• Time in Patent Office: 2,183 Days
• Field of Search: 362/294, 362/800, 362/227, 362/234, 362/235, 362/240, 362/241, 362/246, 362/249.02, 362/341, 362/342, 362/346, 362/363
• 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 compact LED lamp comprising:

a plurality of high-intensity LED modules each comprising a high-intensity LED attached to an LED fixing base plate;

a heat sink, the high-intensity LED modules extending from a first face of the heat sink at predetermined radial intervals around a circumferential direction of the heat sink, the heat sink performing heat radiation of heat generated by the high-intensity LED modules;

a reflector surrounding the plurality of high-intensity LED modules so as to guide light from the high-intensity LED modules in a forward direction, wherein the reflector comprises a diffusion sheet;

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

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

a housing which houses the heat sink, the electronic circuit, and a portion of the reflector therein, the reflector extending to at least a same height above the heat sink in an axial direction of the lamp as a height to which the plurality of high-intensity LED modules extend.

2. The compact LED lamp according to claim 1, wherein the reflector comprises a diffusion sheet.