Light source comprising a large number of light-emitting diodes

• US 6,894,901 B2
• Filed: 12/20/2001
• Issued: 05/17/2005
• Est. Priority Date: 12/21/2000
• Status: Active Grant

• Current Assignee: Continental Automotive GmbH (Continental AG)
• Original Assignee: Siemens AG
• Inventors: Simon, Ernst-Ulrich
• Primary Examiner(s): Thompson, Gregory D.
• Application Number:
  US10/029,403
• Publication Number:
  US 20020093793A1
• Time in Patent Office: 1,244 Days
• Field of Search: 257/707, 257/713, 257 81- 82, 257 99-100, 361/704, 361/707, 361709-710, 361719-721, 361/749, 362/11, 362/373, 362/227, 362/218, 362/294
• US Class Current: 361/707
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• 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: H05K 1/189 characterised by the use of a flexible or folded printed circuit H05K3/326 takes precedence

Abstract

A light source is described, which is composed of a large number of light-emitting diodes (7) in an array arrangement. The light source comprises a mounting board (2) on which a flexible printed circuit (4) is adhesively bonded, on whose free surface a large number of light-emitting diodes (7) are mounted. Their lines (8) make contact with contact pads (10) at the ends of conductor tracks (9) on the flexible printed circuit (4).

Claims

1. A light source comprising a large number of light-emitting diodes, wherein the light-emitting diodes (7) are mounted alongside one another on one face of a flexible printed circuit board (4), and are electrically conductively connected to conductor tracks (9) on the flexible printed circuit board (4), and wherein the flexible printed circuit board (4) is mounted with that face which is opposite the light-emitting diodes (7) on a stable mounting board (2) for heat dissipation, and the flexible printed circuit board projects at one side beyond the mounting board (2), and wherein the conductor tracks are located on the printed circuit board with the light-emitting diodes being disposed along said one face of the printed circuit board.

2. The light source as claimed in claim 1, further comprising a plug attachable to a flexible free end of said one side.

3. A light source comprising a large number of light-emitting diodes, wherein the light-emitting diodes (7) are mounted alongside one another on one face of a flexible printed circuit board (4), and are electrically conductively connected to conductor tracks (9) on the flexible printed circuit board (4), wherein the flexible printed circuit board (4) is mounted with that face which is opposite the light-emitting diodes (7) on a stable mounting board (2) for heat dissipation, and the mounting board (2) is composed of thermally conductive material, and wherein the printed circuit board projects from a side of the mounting board, the part of the printed circuit board, which projects from the side of the mounting board forms a projected part with an end opposite to the mounting board, and a plug connection is on the end of the projected part.