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The Advancement System On LED Light Bulbs
LED light bulbs~ are built around solid-state semiconductor gadgets, so the developing process most closely resembles that used in making electronic products like PC mother boards.
Let's look into the manufacturing ways for a typical LED light bulb made to replace a common incandescent bulb having an Edison Screw. You can see it is a very distinct process from the highly computerized processes used to manufacture our familiar incandescent bulbs. And, in spite of what you might think, people are still very much an important part of the developing process, and not just for testing and Quality Assurance only.
Once the bigger sheets of LED circuit boards have undergone a solder reflow oven (a hot air furnace that melts the solder paste), these are broken up into separate small circuit boards and power wires manually soldered on.
The small power source housed in the body of the light bulb goes through a similar process, or can be delivered complete from the other factory. In any event, the manufacturing procedures are the same; first the PCB transmits through SMT lines, then it would go to a manual dual in-line package (DIP) setup line where a long row of factory employees add one component at a time. DIP relates to the two parallel rows of links projecting from the edges of the package. DIP substances include all integral chips and chip sockets.
While LED lights burn couple of times longer than incandescent or CFLs and require less than half the energy, they need some form of passive heatsink to sustain the high-power LEDs from overheating. The LED circuit board, which is made up of 1.6-2mm thick metal, will undertake the heat from the dozen or so LED components to the metal heatsink frame thus keep temperatures under control. Aluminum-backed PCBs are frequently called "metal core printed circuit boards," and though made of a conductive material the white coating is electrically isolating. The aluminum PCB is actually screwed in place within the heatsink which patterns the lower half of the LED light bulb.
Shell assembly consists of locking the shell in place with screws. A plastic shell covers the power supply and attaches with the metal heatsink and LED circuit board. Ventilation holes are included to allow hot air to escape. Wiring setup for plug socket requires soldering wires to the bulb attachment. Then shell is joined.
Next, the final product LED light goes to burn-in testing and quality control. The burn-in test typically lasts for 30 minutes. The completed LED light bulb is then powered up to see if it is working appropriately and burned in for 30 minutes. There is also a high-voltage discharging and breakdown test and wattage and energy factor test. Samples from the production run are verified for high-voltage spills, energy used, and electricity factor (efficiency).
After a final check to guarantee all the different parts of the LED light are tighter, then it is packed into individual boxes, and bulbs are delivered.
Thus, if you have questioned why LED light bulbs are so highly-priced today, this explanation of how they are created and how that compares to the manufacturing of traditional light bulbs should help. However, it also shows why the cost will fall pretty drastically over the next few years. Just as the cost of manufacturing other semiconductor-based merchandise has fallen considerably due to standardization, mechanization and other key steps along the manufacturing learning curve, the same inexorable forces will drive down the costs of LED light bulb production.
John Reid is, an electrician and advocate in living Green, been helping to promote aGreenSupply.com high quality LED light bulbs products to consumers in saving energy and money just by changing incandescent bulbs to LED light bulbs. Get the full story and reap the rewards TODAY at http://www.aGreenSupply.com
#12 H2O2 - PWM V2.0.1 PCB FireUp Test
