8/18/2023 0 Comments W & d obd led![]() ![]() ![]() The LED or IRED has a transparent package, allowing visible or IR energy to pass through. In this respect, the LED or IRED resembles most other diode types, but there are important differences. These two elements are placed in direct contact, forming a region called the P-N junction. Some LEDs emit infrared ( IR) energy (830 nanometers or longer) such a device is known as an infrared-emitting diode (IRED).Īn LED or IRED consists of two elements of processed material called P-type semiconductors and N-type semiconductors. The output from an LED can range from red (at a wavelength of approximately 700 nanometers) to blue-violet (about 400 nanometers). The light is not particularly bright, but in most LEDs it is monochromatic, occurring at a single wavelength. A light-emitting diode (LED) is a semiconductor device that emits visible light when an electric current passes through it.
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