FPC for LED Application

LED is more and more popular in ordinary family. As we all know, the key part of LED light is printed circuit board. For LED PCB, we usually use metal core material like Aluminum to make circuit on it. As the development of society and diversification of demands, recently more and more people pay attention on the Flexible circuit with LED (or said LED Flexible circuit). Along with the FPC industry growing, as well as the LED application spread out, there’s continuing request of precision lighting & illumination in some special circumstance.

Flexible circuitry is the thinnest available in interconnection technology. The thickness of the dielectric film typically ranges from 7.5 to 125 mm (0.3 to 5 mils) with line widths and spacing as low as 1 mil. As a comparison, standard ribbon cables have minimum line spacing of about 25 mils, with 50 mils being the norm. This wide spacing can be attributed to the fact that ribbon cable typically uses a PVC insulator that is much thicker and heavier than the polymer dielectric film used in flexible circuits. Additionally, ribbon cable requires mechanical connectors for termination and cannot be used as an assembly medium.
Therefore, in many applications where space and weight is a premium, flex is the only option

In fact, this Flexible circuit with LED is a special single sided FPC or two layers FPC, with adhesive tape at the bottom side, easy peel off and installation. The outstanding characteristic is its length. Theoretically, the length of this Flexible circuit can be made according to clients’ request.

Here we’d like to talk about some features of Flexible Circuits with LED & LED Flexible Circuits

1) Separable SMD/SMT LED strip on Flexible circuit boards can be bended to the tour of any products with self adhesive tape back, easy installation! They are mounted on self-adhesive tape and can be conveniently field-cut. For adhesive tape, normally we use 3M 467/946/966, or as per request.

2) As long as the clients request (strip-to-strip soldered connecting). You can also choose our extreme long FPC which is 9.8 feet (3m) without soldering.

3) This flex circuit modules, after LED SMT/SMD were done, are ideal for edge lighting transparent and diffuse material. They provide an optimal solution for precise backlighting of complex contours. They can also be used of lifesaving/rescue sign lights and commercial signs and for making contours like escape routes, borders and stairs.

4) Customer design LED location, quantity, color (red, green, blue, true green, white (phosphor on blue), yellow, etc), according to the request of luminous intensity & color.

5) Flexible PCB board (FPC) surface in white finish, with classic looking, or as per request

6). With IC constant current circuits, guarantee stable working current and even light output for the whole reel of lights.

(7) Thermal and Mechanical Characteristics
Flexible circuits commonly pass through different electrical, thermal, and mechanical environments. For example, the basic disk drive circuit moves back and forth millions of time over a rotating platter. Electrically, the flexible printed circuit compromises its signal integrity each time a trace carrying a signal is moved with respect to the surrounding electrical environment. Thermally, the circuit is exposed to the heat generated within the disk drive enclosure. Mechanically, the circuit works like a spring, either resisting or adding force to the mechanical movement. The design engineer must consider if the electrical problems will overshadow the mechanical problems or if the thermal problems will become the most dominant. All of these considerations can be discussed with a flexible printed circuit manufacturer to arrive at the best solution.

If you need any help or PCB or FPC prototype, please don’t hesitate to contact Wonderful PCB Technology Co., LTD. for more information about Flexible Circuits with LED (LED Flexible circuit boards). We are always to be your best partner of FPC in Asia.