LED LIGHTING LAMP

• US 20090160302A1
• Filed: 04/13/2006
• Published: 06/25/2009
• 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
• Granted Patent: US 7,880,389 B2
• Time in Patent Office: Days
• US Class Current: 313/1
• 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

1-9. -9. (canceled)

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

a lamp body including a light emitting part in which a plurality of light-emitting diode elements are arranged on each of a side surface of a polygonal supporting member and a connection part in which common terminal electrodes electrically connected to the plurality of light-emitting-diode elements are intensively formed on one end portion of the supporting member; and

a socket in which the connection part of the lamp body is detachably attachable and which has a pair of output terminals electrically connected to the common terminal electrodes.

11. The light-emitting-diode lighting lamp according to claim 10, wherein the light emitting part is formed by mounting an 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.

12. The light-emitting-diode lighting lamp according to claim 10, wherein each of the common terminal electrodes comprises a pair of cathode and anode terminal electrodes, and

wherein the cathode terminal electrode and the anode terminal electrode are disposed at a mutually offset position in an insertion direction of the connection part in the socket.

13. The light-emitting-diode lighting lamp according to claim 12, wherein a cathode electrode and an anode electrode of each of the plurality of light-emitting-diode elements are connected to the cathode terminal electrode and the anode terminal electrode of each terminal electrode, respectively.

14. The light-emitting-diode lighting lamp according to claim 10, 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 connection part of the lamp body is detachably attachable in the concave portion.

wherein external connection electrodes to be in contact with the terminal electrodes are provided on an inner peripheral surface of the concave portion, and

wherein the external connection electrodes are configured to be in electrical contact with the pair of output terminals.

15. The light-emitting-diode lighting lamp according to claim 14, wherein the external connection electrodes comprise a pair of band-shaped electrodes, and

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

16. The light-emitting-diode lighting lamp according to claim 14, wherein the external connection electrodes include, when in contact with the terminal electrodes, protrusions configured to press on the terminal electrodes.

17. The light-emitting-diode lighting lamp according to claim 14, wherein the output terminals include leading end portions projecting to the exterior of the socket, and

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