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Details
Inventors: Weindorf, Paul F. L.; Anderson, David R.;
Assignee: Visteon Global Technologies, Inc. (Dearborn, MI)
Primary Examiner: Ngo; Julie
Assistant Examiner:
Attorney, Agent or Firm: Brinks Hofer Gilson & Lione

A flexible circuit board mounted with top-light LEDs and LED control circuits provides a convenient and space efficient way to backlight an LCD. The flexible circuit board may have multiple tabs that are folded such that the top-light LEDs provide light into a light pipe from multiple directions. The top-light LEDs and LED control circuits may be located on the same side of the flexible circuit board for improved cost savings and manufacturability.

DETAILED DESCRIPTION What is claimed is: 1.
A light emitting diode (LED) device, comprising: a light emitting diode; a light emitting diode drive circuit; a flexible circuit board having a tab region; wherein the light emitting diode and the light emitting diode drive circuit are mounted on a first side of the flexible circuit board and wherein the light emitting diode is mounted on the tab region and the tab region is folded such that the light emitting diode emit light toward a center region of the flexible circuit board.
2.
The LED device of claim 1, wherein the light emitting diode comprise a top-light light emitting diode.
3.
The LED device of claim 2, further comprising: a stiffener attached with a second side of the flexible circuit board.
4.
The LED device of claim 3, wherein the tab region of the flexible circuit board is folded twice.
5.
The LED device of claim 4, wherein the tab region of the flexible circuit board is folded twice such that the light emitting diode emits light substantially parallel to a surface of the center region of the flexible circuit board.
6.
The LED device of claim 4, wherein the light emitting diode drive circuit is mounted on a first portion of the tab region that is substantially at a forty-five degree angle relative to a surface of the center region of the flexible circuit board and the light emitting diode is mounted on a second portion of the tab region that is substantially perpendicular to the surface of the center region of the flexible circuit board.
7.
The LED device of claim 6, further comprising a second stiffener attached on the second side of the flexible circuit board in the center region of the flexible circuit board.
8.
The LED device of claim 1, wherein the first side of the flexible circuit board comprises an exposed ground plane that can be connected directly to a frame member.
9.
The LED device of claim 8, wherein the exposed ground plane transfers heat generated by the light emitting diode to the frame member.
10.
The LED device of claim 9, further comprising a thermally conductive material between the exposed ground plane and the frame member



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