QL202YT Optoelectronics

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LED indication is widely used in various fields, such as industrial, automotive, military and medical. QL202YT is one of the most commonly used discrete LED for indication. It is a rectangualar lens that is characterized by its exceptional brightness, wide viewing angle and ultra-low power consumption. So what is the application field and working principle of this LED?

Application Field of QL202YT LED

QL202YT LED is applicable in any situation where the operator needs to see the status of the system or receive a visual warning signal. In the field of industrial automation, it has been used as a visual signal in any electrical control cabinet or control panel, such as a machine control system, a control panel, a security system and an instrument monitoring system. It is also used in the automotive field, like airbag status indicator, ABS system indicator and seat belt pre-tentioner indicator. In the military field, it is often used in guidance systems, missile early warning systems, vehicle fire control systems, signal lamps and particularly in night vision systems. And in the medical field, it acts as a signal light for signal inspection and medical equipment.

Working Principle of QL202YT LED

The working principle of QL202YT LED is not too complicated. It is essentially a diode that emits different frequencies of light when DC electric current passes through it. As a semiconductor device, electrical signals are converted into corresponding optical signals. When the power supply is turned on, electrons will move to the anode of the PN junction through the circuit, leaving a number of holes on the cathode. The holes and electrons will recombine in the junction. When the electrons transit from the conduction region to the valence region, part of their energy will be converted into light. With the increased current, the intensity of the light will become brighter.

Conclusion

In a nutshell, QL202YT LED is a commonly used discrete LED for indication. It has a wide viewing angle, low power consumption and ultra-brightness. Moreover, its application fields include industrial, automotive, military and medical. The working principle of QL202YT LED is not complicated, that is, electrical signals are converted into corresponding optical signals through the PN Junction.

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