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Generating Led Light

How LED bulbs Are Made

One hundred and thirty years, Thomas Edison has completed the first successful test of sustained incandescent bulb. With a little progressive improvements in the way, the basic technology of Edison lit the world since. This is changing. We are at the dawn of a lighting revolution semiconductor, which will eventually replace the bulbs Edison with a solution of energy-efficient lighting more. The solid state LED lighting will eventually replace almost all of the hundreds of billions of incandescent and fluorescent lamps used anywhere in the world today. In fact, as a step in this direction, Obama unveiled new last June, the strict standards lighting that will encourage the phasing out of incandescent bulbs (Who are already banned in parts of Europe).

To understand how the LED bulbs are revolutionary and why they are still expensive, it is instructive to examine how they are made and compare it to the manufacture of incandescent bulbs. This article examines how the bulbs are made and then contrasts this process with a description Typical manufacturing process for LED bulbs.

So, let's take a look at how the traditional incandescent light bulbs are manufactured. You will find that this is a classic example of an automated industrial process refined in over a century of experience.

Although no one incandescent bulb types differ in size and power, they all have three basic parts: the filament, the lamp and the base. The tungsten filament. Although very fragile, tungsten filaments can withstand temperatures of 4,500 degrees Fahrenheit and above. The plug or lead in son are generally made of nickel-iron wire. This thread is immersed in a solution of borax to make the wire more adherent to glass. The bulb itself is glass and contains a mixture of gas, usually argon and nitrogen, which increases the lifetime of the filament. The air is pumped out of the bulb and replaced by gas. A standardized base holds the assembly in place. The base is known as the base "Edison screw." Aluminum is used outside and glass used to isolate the interior of the base.

Originally made by hand, making bulb is now almost entirely automated. First, the filament is produced by a process known as drawing, in which tungsten is mixed with a binder material and pulled through a die (one shaped hole) in a thin wire. Then, the wire is wound around a metal bar called a chuck for the dish in its spiral shape good, and then heated in a process known as annealing, softening of the wire and makes its structure more uniform. The mandrel is then dissolved in acid.

Second, the coiled filament is attached to the lead in the son. Lead in son have hooks at their ends which are either pressed onto the end of the filament or, in larger bulbs, spot welded.

Thirdly, glass bulbs or casings are produced using a tape machine. After heating in an oven, a continuous ribbon of glass moves along a belt. Precisely aligned air nozzles blow the glass through the holes in the conveyor belt into molds, creating the casings. A machine tape movement speed can produce more than 50,000 vials per hour. After the casings are blown, they are cooled and then cut the ribbon machine. Then Inside the bulb is coated with silica to eliminate glare caused by bright filament discovered. Label and power are then stamped on the top outside of each enclosure.

Fourth, the base of the bulb is also constructed using molds. It is made with marks on the form of a screw so that it can easily fit into the socket of a lighting fixture.

Fifth, once the filament core, and bulb are made, they are assembled by machines. First, the filament is mounted strains in the Assembly, with its ends clamped to the two lead-in son. Then, the air inside the bulb is evacuated, and the case is filled with the mixture of argon and nitrogen.

Finally, the base and the bulb are sealed. The base slides on the end of the bulb glass so that no other material is necessary to keep them together. Instead, their line shapes allow both parts to be held together perfectly crossed with the son of touching the aluminum base to ensure good electrical contact. After testing, the bulbs are placed in their original packaging and shipped to consumers.

The bulbs are tested for both lamp life and power. To provide rapid results, selected bulbs are screwed in test bays and life turned to levels far exceeding normal. This provides an accurate measurement of the length of the bulb latter under conditions normal. The test is conducted in all manufacturing plants as well as some independent testing facilities. The average lifespan of the bulb typical household is 750 to 1,000 hours, depending on the power.

LED bulbs are built around the semiconductor devices to the state solid, so that the manufacturing process closer to that used to manufacture electronic products such as PC motherboards.

An LED (SLE) is a solid state circuit that generates electricity from light by the movement of electrons in a semiconductor material. Technology LED has been around since the 1960s, but for the first LED 40 years mainly used in electronic devices to replace the miniature bulbs. In the last decade, advances in technology finally stimulated the production of light high enough for LEDs are beginning to compete seriously incandescent and fluorescent bulbs. Like many technologies, such as the cost of production falls each successive generation LED also improves the quality of light output per watt, and heat management.

The computer industry is well suited to the manufacture of lighting LEDs. The process is not a lot different than making a computer motherboard. Companies that manufacture the lights themselves are generally not in the lighting industry, or it is a small part of their business. They tend to be houses semiconductors that are happy start of their products, which explains why prices on high performance LED has fallen so much over the past 15 years.

Bulbs LED were expensive in part because it takes a certain number of LEDs for lighting large area instead of a narrow beam, and the cost of Assembly adds to the overall price. In addition, assemblies, consisting of sets of LEDs to create more opportunities for defects product.

An LED light is composed of four basic elements: an LED circuit, heater, food, and a shell. The lights soon the first day of bare printed circuit boards (PCBs) and high brightness LED components arrive from separate factories that specialize in adoption of these components. LED elements to create a little heat, so that the PCBs used in lighting is special. Instead of the sandwich standard non-conductive epoxy and fiberglass, the circuit is built on a thin sheet of aluminum that acts as a heat sink.

The PCB aluminum used in the LED lighting is covered with a nonconductive material and conductive copper trace lines to form the circuit. dough Solder is then applied to the right places and then Surface Mount Technology (SMT) machine places small elements, LED driver ICs and other components on map ultra high speed.

The round shape of the classic LED bulb means that most circuit boards are circular to facilitate handling several small circular PCBs are combined into a single rectangular PCB more than SMT automated machines can handle. Think of it as a tray of cupcakes in motion from one machine to another along a conveyor belt, then at the end the cupcakes are broken without the tray.

Lets Take a look at the manufacturing stages of a typical LED bulb designed to replace a standard incandescent bulb with an Edison screw. You will see that a very different process from the highly automated manufacturing process of our familiar incandescent bulbs. And despite what you might imagine, people are still a necessary part of the manufacturing process, not only for testing and quality assurance or the other.

Once leaves more LED circuit boards are passed through a reflow oven (hot air oven which melts the solder paste), they are divided into individual counseling small circuit and son electric welded manually.

The small power supply housed in the body of the light bulb goes through the same process, or can be supplied complete in another factory. In both cases, the manufacturing steps are the same: first the PCB through the SMT lines, then he goes a set of dual in-line (DIP) assembly line where a long line of factory workers add a component at a time. DIP refers to two parallel rows of leads projecting from the sides of the package. DIP include all components and embedded chips made smart.

While LED lights burn several times longer than incandescent or CFL and require less than half the energy they need form of passive radiator to keep the high-power LEDs from overheating. The LED circuit, which is made from aluminum thickness 1.6, 2mm lead the heat of the ten LED elements on the metal frame and heat sink and keep temperatures in check. Aluminum backed PCBs are sometimes called metal core printed circuit boards, and well made of a conductive material layer of white paint is electrically isolated. The PCB aluminum is a screwed up in the radiator that is the bottom half of the LED bulb.

After that, the board power connector is fixed in place with adhesive. Early converts 120/240V mains power at a lower voltage (12V or 24V), it fits into the cavity behind PAC aluminum.

Shell Assembly consists of locking the tank in place with screws. A plastic shell covers the supply of power and connects with the heater metal and LED circuit. Ventilation holes are included to allow hot air to escape. Wiring Mounting socket son current requires soldering sleeve. Then the shell is attached.

Then, the LED light is sent to the full burn-in test and control quality. Burn-in test typically takes 30 minutes. The LED bulb is completed and then turned to see if it works properly and burned for 30 minutes. There is also a high voltage leak and test ventilation and energy consumption and power factor testing. Samples from the production run are tested for leaks at high voltage, energy, and power factor (efficiency).

The finished bulbs go through a stage of final crimping the metal cap is crimped in place, are bar-coded and identified by lot numbers. the external security labels are applied and the bulb is inked information, such as the make and model number. Finally, everything remains is to fix the LED plastic cover that is glued in place.

After a final check to make sure that all the different parts of the LED light are tight, it is packaged in individual boxes, and bulbs are shipped.

So if you asked why LED bulbs are so expensive today, this explanation of how they are produced and how it compares to the manufacture of traditional light bulbs should help. However, it also reveals why the cost will decrease quite dramatically over the next few years. As the cost of other products Semiconductor fell dramatically through standardization, automation and other key points along the manufacturing learning curve, the same inexorable forces will drive down production costs of LEDs.

For tips on LEDs, including everything you ever wanted to know about the LED tube lights , please visit ledtubelights.org and objective examination of LED lighting products, please visit LED Reviews .

About the Author

James is a small business owner who enjoys sharing the lessons he has learned retrofitting his office and home with energy-efficient LED lighting. In fact, he likes LED lights so much, that he has become sort of an LED lighting evangelist. For practical advice about LED lights, including everything you ever wanted to know about LED tube lights, please visit ledtubelights.org.

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