What is the LED & FND?

Overview of LED and FND Before presenting the experimental results, this section provides an overview of the operational principles of LEDs and FNDs. In modern society, we interact closely with a myriad of electronic devices in our daily lives, such as televisions, smartphones, smartwatches, and tablet PCs. As the primary user interface for these devices, display technology that visually communicates information is an indispensable component. Even the most advanced, high-resolution displays of today are fundamentally rooted in the operating principles of basic optoelectronic components, such as Light-Emitting Diodes (LEDs) and Seven-Segment Displays. Therefore, this experiment aims to build a foundational understanding of modern display systems by practically implementing and analyzing the electrical characteristics and driving mechanisms of LEDs and Seven-Segment Displays, which form the cornerstone of display technology. 1. Operating Principle of LEDs First, an LED (Light Emitting Di