What is a LED bulb filament their advantages and disadvantages

LED lamps have long captured the modern market and enjoy a great popularity. Among the variety of shapes and sizes of LED lamps can be found filament lamp, which at a first glance it is possible to confuse the good old bulbs Ilyich. But they have significant differences from conventional LED bulbs. In this article I will talk about these unusual lamps more.

The design of filamentLEDlamps

The first successful experiments on the production of filament LED were carried out in 2008 by the Japanese researchers, and further research will make it possible in 2013 to establish mass production of this products.

The term "filament"- means" filament ", but in Russia filament LED upgraded to "filament lamp", which consists of four main components:

1. Cap standard E27 and E14. In some models, there is also a base made of a dielectric material.

2. The glass bulb.

3. Driver.

4. And directly LED bars (LED filament).

With three parts, such as bulb, socket and driver, in principle, everything is clear, but that's about LED filaments, let's talk of more.

Thus, LED filament is a rod made of glass or a rounded rectangular shape, wherein a plurality of sequentially attached crystals by COG (Chip - on - Glass). Wherein the power of each such "stick" is (in most cases) 1 Watt.

After the diodes are secured to the flask, they were covered with a layer of silicone yellow phosphor. This rather thick coating layer prevents the passage of ultraviolet radiation and provides dispersion of luminous flux which corresponds as closely as possible the color temperature of conventional lamps Ilyich.

But since the LEDs can not be powered from AC voltage, the connection is through a fairly simple scheme. But the flagship of the company is still trying to place in such a small space full driver. But even among the top firms in the filament LED with an E27 driver it is different from the same lamp socket E14. For the simple reason that in the E27 just corny more space than the E14. And there it is possible to position the stabilizer and a smoothing capacitor of sufficient capacity (to reduce ripple).

To place these same parts in the socket 14 E some manufacturers artificially increased by applying plinth plastic spacers, which allows a driver to set an overall circuit and a smoothing capacitor sufficient capacity.

It is also a very important component of long-lasting operation of the product is high quality heat dissipation. Current LED strips is limited and does not reach its maximum, so the crystals do not overheat. The temperature of the P-N- transition is in the region of 60 degrees Celsius.

Therefore, to divert excess heat is pumped into the flask a mixture of gases helium and based on this gas through a fine glass flask transmits and dissipates heat to the atmosphere. And it is quite effective.

But the weak link in such lamps are not diodes and driver. Since in the process it also generates heat, and therefore it is heated. And because of the limited amount of the cap heat dissipation is extremely bad.

The bulk of the damage and the product quite strong flicker in the process is exactly the overheating of poor driver.

Note. The way out of this situation is to purchase a lamp with an operating range of 85 to 250 volts. This indirectly indicates that this product incorporates high-quality and expensive driver capable of withstanding overheating.

Pros and cons of filament lamps

On the positive side filament LED lamps include the following points:

1. Ideal for the implementation of design solutions requiring the appearance of standard incandescent lamps.

2. Angle light scattering is a full 360 degrees, and other LED lamps have limited dispersion angle.

3. Transparent bulb provides increased percentage of color.

4. No heavy radiator.

5. Long service life (only in case of acquisition of quality products).

At this pluses ended and now let's consider the disadvantages of such lamps.

The disadvantages include:

1. The lamp can not be repaired in case of burnout of any element.

2. The flask was easily broken, since it is made of glass.

3. The cheap products use very simple rectifier, instead of a full driver.

4. In Chinese samples of poor quality and the service life of the power does not match the declared parameters.

5. It has clearly overestimated the price tag, as long as there are not so common in our market.

6. High ripple factor in many specimens.

conclusion

Filament LED lamp while have more disadvantages than advantages, but this is due to poor quality components. Once manufacturers optimize production and raise the quality of components, these lamps will become quite popular in the market.

That's all I wanted to tell you about these new lamps for our market. If the material turned out to be useful to you, you will appreciate his huskies. Thank you for your attention!