The Chips in the LED Lighting

The chip is the brain of the LED technology and largely defines the quality of a luminaire.

The Chips in the LED Lighting

You have already spoken of the important thing is a proper thermal lamps management and the vital importance of a good driver in the luminaires, but perhaps the most important part in the functioning of a LED luminaire is the chip that regulates its operation. There are different constructions of fixtures depending on as chips are integrated in the lamp, here you can see the differences, but it is another issue, vamos Al grano.

The durability of the luminaire, energy consumption, or the quality of the light intensity or color can be negatively affected if the chip of the luminaire does not host and is not of adequate quality. Is undoubtedly the most important component of any LED luminaire. Going to explain briefly the process of manufacture and them components and materials that it make up, to make us an idea of the importance of the chip. Check societypically for how to choose the right lighting.

The chip is composed by a series of layers created in materials semiconductor whose committed is convert the electricity in light. These small components (of just ones mm) lead after of if a complex development that has as target get that them luminaries LED operate and offer the best light (intensity, brightness, color) and the greater resistance and duration possible.

How does the light?

The emission of the light of the LED is produces when the current passes between the materials semiconductor of the chip. The semiconductor are of type P (positive charge) and type N (negative charge) and the light is generated when the current flows through the junction between the two point (point PN). At this point the negatively charged electrons occupy the holes of the of the positive charge losing energy and being in the form of a photon, or what is the same: light.

Because LED lights are expensive?

Both materials eating chipand its manufacturing process determines the quality of the product and the characteristics of the chip. He process of manufacture is complex and very controlled (to level temperature and pressure) and the materials used in its manufacture are very expensive (carbide of silicon, Sapphire). It is important to know these data in order to understand the seemingly high price of LED luminaires especially compared to other types of technologies such as fluorescent or incandescent.

Manufacturing process

The circular semiconductor base about 15 cm of diameter on which the other components of the chip will be installed is first elaborated. Its manufacture in carbide of silicon or Sapphire and the rest of them components installed on she will determine the features light and of color of the LED.

The process of integration of all the components in the base in different layers (Layer N, layer P, PN junction) is called epitaxy and is used in the manufacture of any chips or integrated circuits. A time finished the process epitaxy (Assembly of components in the the base), the base Semiconductor is divided in chips that are which is mounted in them different luminaires.

Wafer of chips led ready for cut and be mounted

A connected through the current electric is tested connecting them to the current electric for and is checked all its capabilities lighting.

Testing the chip by connecting it to the electrical outlet

New materials, new possibilities

In them last months is is using for the manufacturing of them chips, Silicon as substrate for cheapen the cost (almost a 80% less) and profitable the investment of the luminaires. He main problem of its use is the difficulty of integrate the nitride of gallium on the silicon, since reacts of form very different before a change of temperature, which can get to generate cracks in the base.

Other research is focused in the use directly of nitride of gallium as substrate base, reducing the difference structural between the different layers. Its use would increase the cost of manufacturing, but would multiply by 10 generated light (lumens per watt consumed), which would offset the cost.

It is suitable before purchasing a LED luminaire us to know the manufacturer of the chip that has installed the fixture, since it depends largely on the quality and duration. Ledbox installed in their Chips of high quality luminaires that offer excellent performance of the world’s most prestigious manufacturers: create, LG, OSRAM, Phillips, Samsung, Sharp, Epistar, BridgeLux

 

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