LED Technology

The average frequency emitted by LEDs coincides with the visible light area of spectrum. In addition, there are infrared (IR) or ultraviolet (UV) LEDs which emit light in a frequency not visible to eye. For a better understanding of light emittance mechanism of LED, one needs to have knowledge on quantum physics, chemistry, electronic and optic fields.


The most important part of LED is the LED chip which is comprised of semiconductor materials and which emits light. LED chip is a point light source and the light is emitted towards a specific direction thanks to the reflector element place inside the sheath. When a LED with a transparent sheath is view carefully, LED chip can be seen.


In the manufacturing process of LED, manufacture is carried out by the use of nanotechnology in the facilities where advanced technologies are used.


The PN joint located between the layers of LED has a feature to emit light. In this layer;

- AlInGaP is used to obtain red and amber light,

- InGaNis used to obtain blue and green light


In order to achieve white LED light, the blue chip is covered with yellow phosphorus.