5972201407 Optoelectronics

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LED indication is a type of visual indication that is used to convey information with the help of light-emitting diodes (LEDs). LEDs are generally used in applications where a very small, inexpensive and reliable form of indication is required. The most common applications of LEDs include automotive, home appliances and signal indication. LED indication discrete LED indications are typically used for short time signal indication, for example for providing audio and visual signals to warn about any kind of danger or to signal any kind of alarm condition. These discrete LEDs, when combined, could be used to provide an indication that conveys certain meaning or information.

5972201407 application field and working principle

LED indication is used in a wide range of applications, from appliances to industrial warning signs. The basic principle behind LED indication is to utilize the semiconductor chip to control electric current that ultimately generates light. LEDs are available in a variety of forms and sizes, such as LED bulbs and LED strips. LED bulbs are used to indicate the general power or system status with a single indicator. LED strips are mainly used for more detailed indication system, such as those used in audio-visual systems to indicate different functioning modes.

In order to select an appropriate LED indicator, the following system requirements should be considered. First of all, the voltage requirement of the system should be considered. Different types of LED indicator will require different voltage or current requirements. Secondly, the size and weight of the LED indicator should be taken into consideration, since mounting of an indicator with too large or too heavy size will cause unnecessary burden to the system. Finally, the levels of brightness of the indicator are another important factor to determine, since some applications may require the indicator to be of higher visibility than others.

The working principle of LED indication is based on the PN junction. When electric current is applied to the PN junction, electrons and majority carriers travel between the two sides of the junction, creating a potential difference across the junction. This potential difference creates a forward potential and the holes or the positive charges move to the P side due to diffusion, creating an electric field. As the flowing of electric current increases, the electric field creates more electron holes and the LED emits light.

LED indication is a reliable source of visual indication that is used in many applications. LED indication discrete LED indicators are used for short time signal indication, for example for providing audio and visual signals to warn about any kind of danger or to signal any kind of alarm condition. Environmental conditions, voltage requirements, size of the LED and the brightness level should be considered before selecting the appropriate LED indicator for any application. The working principle of LED indication is based on the PN junction, where the electric field creates more electron holes and the LED emits light when electric current is applied.

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