- 发光二极管_百度百科
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、医疗器件等。
- Light-emitting diode - Wikipedia
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, thereby releasing energy in the form of photons
- LED | Definition, Light, Facts | Britannica
An LED (light-emitting diode) is a semiconductor device that emits infrared or visible light when charged with an electric current
- 什么是LED？ - 电路设计学习指南R课堂
LED是电致发光的器件，其响应速度非常快，通电的瞬间即可点亮。 利用该特性优势，LED还可用于超高速闪烁的显示器、红外遥控器以及利用光信号传输和接收数据的可见光通信等技术。
- LED - Light Emitting Diode: Basics, Types and Characteristics
LED or Light Emitting Diode is a very common source of light An article about Basics of LED, Characteristics of LED and different Types of LED
- Learn About LED Lighting - ENERGY STAR
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 emit light and heat in all directions
- Light Emitting Diode (LED): Principle, Advantages, and Uses
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 energy in the form of light
- 發光二極管 - 维基百科，自由的百科全书
要控制LED的亮度，又想提升效率、減少耗電，卻不想使用價格較高的開關式電源的話，可以使用脉冲宽度调制（Pulse width modulation - PWM）推动LED，通過控制不停重複的每一個時段內导通时間與關閉時間的比例，也就是占空比，可以改变流经LED的平均电流，从而控制
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