LED lighting lamp

• US 7,880,389 B2
• Filed: 04/13/2006
• Issued: 02/01/2011
• Est. Priority Date: 04/14/2005
• Status: Active Grant

• Current Assignee: Citizen Electronics Company Limited
• Original Assignee: Citizen Electronics Company Limited
• Inventors: Imai, Sadato, Kanamori, Masayoshi
• Primary Examiner(s): Won; Bumsuk
• Assistant Examiner(s): Lee; Nathaniel J
• Application Number:
  US11/911,595
• Publication Number:
  US 20090160302A1
• Time in Patent Office: 1,755 Days
• Field of Search: 313/623, 313/504, 362/362, 362/367
• US Class Current: 313/623
• CPC Class Codes: F21K 9/232 specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
• CPC Class Codes: F21S 43/15 Strips of light sources
• CPC Class Codes: F21S 43/19 Attachment of light sources or lamp holders
• CPC Class Codes: F21V 19/001 the light sources being semiconductors devices, e.g. LEDs
• CPC Class Codes: F21W 2107/10 for land vehicles
• CPC Class Codes: F21Y 2107/30 on the outer surface of cylindrical surfaces, e.g. rod-shaped supports having a circular or a polygonal cross section
• 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]
• CPC Class Codes: H01L 2224/45144 Gold (Au) as principal constituent
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/00014 the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details
• CPC Class Codes: H01R 33/94 Holders formed as intermediate parts for linking a counter-part to a coupling part

Abstract

The present invention is an LED lighting lamp which comprises a lamp body including a light emitting part in which a plurality of LED elements are arranged on each of side surfaces of a polygonal supporting member and a connection part which is provided at a different position from that of the light emitting part and is formed with a plurality of terminal electrodes electrically connected to the LED elements, and a socket in which the connection part of the lamp body is fitted and which has a pair of output terminals electrically connected to the terminal electrodes, and which is configured to enhance reliability and long-term stability and reduce a cost involved in exchanging a light source.

Claims

1. A light-emitting-diode lighting lamp, comprising:

a plurality of light-emitting diode elements arranged at each of side surfaces of a polygonal supporting member;

a pair of cathode and anode terminal electrodes disposed at one end portion of each of the side surfaces of the polygonal supporting member, the pair of cathode and anode terminal electrodes being electrically connected to the plurality of light-emitting-diode elements disposed at the corresponding each of the side surfaces of the polygonal supporting member; and

a socket in which the one end portion of each of the side surfaces is inserted, the socket being detachably attachable to the one end portion of the side surfaces and having a pair of output terminals electrically connected to the pair of cathode and anode terminal electrodes at the one end portion of each of the side surfaces,

the pair of cathode and anode terminal electrodes at the one end portion of each of the side surfaces being disposed at mutually shifted positions in a direction that the one end portion of each of the side surfaces is inserted in the socket.

2. The light-emitting-diode lighting lamp according to claim 1, wherein the light-emitting diode elements arranged at each of the side surfaces are disposed in a light-emitting-diode unit on each of the side surfaces of the supporting member, and each of the light-emitting-diode units includes a base on which the plurality of light-emitting-diode elements are arranged and a light transmitting resinous body which seals the light-emitting-diode elements.

3. The light-emitting-diode lighting lamp according to claim 1, wherein a concave portion which is formed in the socket has a polygonal-cross-sectional shape similar to that of the supporting member and the one end portion of each of the side surfaces is detachably attachable in the concave portion,

wherein the pair of output terminals further comprises external connection electrodes, and the external connection electrodes are provided on an inner peripheral surface of the concave portion.

4. The light-emitting-diode lighting lamp according to claim 3, wherein the external connection electrodes comprise a pair of band-shaped electrodes, and

wherein one of the pair of band-shaped electrode is to be electrically in contact with all the cathode terminal electrodes provided at the side surfaces of the supporting member, and the other of the pair of band-shaped electrode is to be electrically in contact with all the anode terminal electrodes provided at the side surfaces of the supporting member.

5. The light-emitting-diode lighting lamp according to claim 3, wherein the external connection electrodes include protrusions configured to press on the pair of cathode and anode terminal electrodes disposed at one end portion of each of the side surfaces of the polygonal supporting member.

6. The light-emitting-diode lighting lamp according to claim 3, wherein the output terminals include a pair of leading end portions projecting to the exterior of the socket and electrically connected to the pair of cathode and anode terminal electrodes disposed at one end portion of each of the side surfaces of the polygonal supporting member, and

wherein the leading end portions are to be fixed to a motherboard.