In electrical engineering, a light-emitting diode (LED) is a semiconductor device that emits light when current flows through it. Electrons in the semiconductor recombine with electron holes, releasing …

发光二极管，简称为LED，是一种常用的发光器件，通过电子与空穴复合释放能量发光，它在照明领域应用广泛。 发光二极管可高效地将电能转化为光能，在现代社会具有广泛的用途，如照明、平板显示 …

Nov 25, 2025 · An LED (light-emitting diode) is a semiconductor device that emits infrared or visible light when charged with an electric current.

Feb 24, 2012 · This page is about Solid State Light or Light Emitting Diode or LED including the introduction of the working principle of LED. The features of LED are also mentioned in this article.

Jan 1, 2025 · LED 的英文全名是 Light-emitting diode，也就是發光二極體。 LED 說穿了其實是一種半導體，由三價與五價元素所組成，並會在電流通過時發光。 LED 因為耗電低，體積小、壽命長、耐撞 …

Jun 10, 2025 · A light-emitting diode (LED) is a small electronic device that emits light when an electric current flows through it. LED works by passing electricity through a semiconductor, which releases …

Sep 20, 2024 · In this article, we have seen about basics of LED and few important characteristics of LED. In the next tutorial, we will see How an LED works and the construction of an LED.

Aug 30, 2023 · 在我們的生活中，LED的使用非常廣泛（比如顯示器和照明等），那麼，它們究竟是如何發光的呢？ 例如，燈泡和螢光燈是透過燈絲發熱和放電現象等間接地將電能轉化為光能而發光的， …

The correct past and past participle of lead is spelled led. If you aren’t sure whether to use led or lead as the verb in your sentence, try reading it aloud to yourself.

When designed well, LED lighting is more efficient, versatile, and lasts longer. LEDs are “directional” light sources, which means they emit light in a specific direction, unlike incandescent and CFL, which …