Light-emitting diode - Wikipedia
网页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 energy in the form of photons.
How Light Emitting Diodes Work - HowStuffWorks
网页Light emitting diodes, commonly called LEDs, are real unsung heroes in the electronics world. They do many different jobs in all kinds of devices. They form numbers on digital clocks, transmit information from remote controls, light up watches and tell you when your appliances are turned on.
发光二极管 - 百度百科
网页微型发光二极管具有自发光显示特性，比自发光显示的有机发光二极管(Organic Light Emitting DiodeOLED)效率高、寿命较长、材料不易受到 环境影响 而相对稳定。
Light-emitting diode physics - Wikipedia
网页Light-emitting diodes (LEDs) produce light (or infrared radiation) by the recombination of electrons and electron holes in a semiconductor, a process called "electroluminescence". The wavelength of the light produced depends on the energy band gap of the semiconductors used.
Light Emitting Diode or the LED Tutorial - Basic Electronics …
网页The light emitting diode is the most visible type of semiconductor diode. They emit a fairly narrow bandwidth of either visible light at different coloured wavelengths, invisible infra-red light for remote controls or laser type light when a forward current is passed through them.
LED | Definition, Light, & Facts | Britannica
网页2024年9月13日 · An LED (light-emitting diode) is a semiconductor device that emits infrared or visible light when charged with an electric current.
How do diodes and light-emitting diodes (LEDs) work? - Explain …
网页2022年7月22日 · LEDs are simply diodes that are designed to give off light. When a diode is forward-biased so that electrons and holes are zipping back and forth across the junction, they're constantly combining and wiping one another out. Sooner or later, after an electron moves from the n-type into the p-type silicon, it will combine with a hole and disappear.
Light Emitting Diode (LED): What is it & How Does it Work?
网页2012年2月24日 · LED Definition: A Light Emitting Diode (LED) is a semiconductor device that emits light when electric current flows through it. Working Principle of LED: The working principle of LED involves applying a forward bias current, which causes electrons and holes to recombine at the junction, producing light.
Light-Emitting Diodes: A Primer | Light Sources - Photonics
网页Light-emitting diodes (LEDs) are semiconductors that convert electrical energy into light energy. The color of the emitted light depends on the semiconductor material and composition, with LEDs generally classified into three …
Light-Emitting Diode, LED - SpringerLink
网页2023年1月1日 · Light-emitting diodes made of organic semiconductor material are referred to as OLEDs; they are planar light sources. A separate chapter deals with OLEDs. Until the mid-1990s of the last century, LEDs had a low lumen output and low efficiency, making them only suitable as small indicator lamps (e.g., in electrical appliances).