Multiple light emitting diode module

• US 5,404,282 A
• Filed: 08/19/1994
• Issued: 04/04/1995
• Est. Priority Date: 09/17/1993
• Status: Expired due to Term

• Current Assignee: Lumileds LLC (Apollo Global Management, Inc.)
• Original Assignee: Hewlett-Packard Company (HP Inc.)
• Inventors: Leising, James L., Klinke, Richard J., Sasser, Gary D.
• Primary Examiner(s): NOT, DEFINED
• Assistant Examiner(s): NOT, DEFINED
• Application Number:
  US08/293,110
• Time in Patent Office: 228 Days
• Field of Search: 362/249, 362/252, 362/800, 439/877, 439/879, 439/885, 361/637, 361/639, 361/698, 174/703, 174/172, 174/52.4
• US Class Current: 362/249.06
• CPC Class Codes: F21K 9/00 Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
• CPC Class Codes: F21S 43/14 Light emitting diodes [LED]
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H01L 25/13 the devices being of a type provided for in group H01L33/00
• 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 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
• CPC Class Codes: H05B 45/357 specially adapted for retrofit LED light sources
• CPC Class Codes: H05B 45/40 Details of LED load circuits
• CPC Class Codes: Y10S 362/80 Light emitting diode

Abstract

A LED module for providing a source of illumination comprises a plurality of LED lamps each having an anode lead and a cathode lead for providing electrical and mechanical connection. The anode lead of each LED lamp is connected to an anode bus bar and the cathode lead of each LED lamp is connected to a cathode bus bar by solderless connection. The bus bars and the leads of each LED lamp may be integral with each other. Alternatively, the bus bars and leads may be non-integral with each other, connected by an interlocking interaction or interference fit between approximately complementary portions of each lead and bus bar. The LED module may accommodate serial electrical interconnection with other LED modules, it may be shaped according to the particular contour or design of an accommodating light assembly, and it may comprise LED lamps placed at arbitrary positions to achieve a predetermined degree of illumination.

Claims

1. An LED module comprising:

a plurality of LED lamps, each LED lamp having at least two connecting leads;

an anode bus bar;

a cathode bus bar; and

means for mechanically and electrically connecting the LED lamps between the anode bus bar and cathode bus bar by a mechanical interlocking connection between a deformed portion of each LED lamp lead and an approximately complementary deformed portion of the bus bar, the deformed portions of the LED lamp lead and the bus bar forming button locks.

2. The LED module as recited in claim 1 wherein the plurality LED lamps are serially connected together between the anode and cathode bus bar to form a number of LED lamp strings that are each electrically connected in parallel with the anode bus bar and the cathode bus bar.

3. The LED module as recited in claim 2 wherein the leads of each LED lamp and the bus bars are made from electrically conductive materials having approximately equal coefficients of thermal expansion.

4. An LED module comprising:

an anode bus bar;

a cathode bus bar;

a plurality of LED lamps disposed between the anode and cathode bus bars, each LED lamp having an anode lead and a cathode lead, the LED leads and the bus bars being constructed from electrically conductive materials having approximately equal coefficients of thermal expansion;

solderless connection means for both electrically and mechanically connecting the LED lamps to the anode and cathode leads, the solderless connection means comprising a button lock; and

means for interconnecting the LED module to a similarly constructed LED module in electrical series.

5. The LED module as recited in claim 4 wherein the plurality of LED lamps are serially connected together between the anode and cathode bus bar to form a number of LED lamp strings that are each electrically connected in parallel with the anode bus bar and the cathode bus bar.