LED Lighting Theory
- Nov 21, 2018 -

LED lighting theory

Light-emitting diodes, commonly referred to as LEDs. The light-emitting diode is just a tiny light bulb. But unlike the usual incandescent bulbs, the light-emitting diodes have no filaments and are not particularly hot. They simply emit light by the movement of electrons in the semiconductor material. Since the light-emitting diode does not burn out, the life is longer. And the small plastic bulb of the light-emitting diode makes the light-emitting diode more durable, and the LED can be more easily adapted to the current electronic circuit. The illuminating process of traditional incandescent lamps involves generating a lot of heat, which is a waste of energy. The heat emitted by the light-emitting diode is very small. Relatively speaking, the more light is directly emitted, the greater the need for electrical energy is reduced.

Light is a form of energy that can be released by atoms. It is made up of many small bundles of tiny particles with energy and power but no quality. These particles are called photons and are the most basic unit of light. Photons are released because of the movement of electrons. In an atom, electrons move in orbit around the atoms. Electrons have different energy levels in different orbit functions. In general, electrons with more energy move away from the nucleus in orbit. When electrons jump from a lower orbit to a higher orbit, the energy level increases, and conversely, the electrons release energy when they fall from a higher orbital function to a lower orbital function. Energy is released in the form of photons. Higher energy drops release higher energy photons, which are characterized by its high frequency.

Free electrons fall from the P-type layer through the diode into empty electron holes. This involves dropping from the conduction band to a lower orbital function, so the electrons release energy in the form of photons. This happens in any diode. When the diode is made up of something, you can only see the photon. The atoms in a standard silicon diode, for example, when electrons fall to relatively short distance atoms are arranged in this manner. As a result, the human eye is invisible because the electronic frequency is so low.

Visible light LEDs, such as those used in digital display clocks, determine the frequency of the photon, in other words, the color of the light. Most of the diodes are not very effective when they emit light. In a normal diode, the semiconductor material itself ends up attracting a large amount of light energy. The light-emitting diode is covered by a plastic bulb that concentrates the light in a particular direction.

The price of semiconductor parts has been greatly reduced over the past 10 years, and it is believed that the future LEDs will be a more cost-effective choice for lighting in a wider range of applications.

Dalian Xinghai Technology Co., Ltd.