対訳 発光ダイオード
出典:Wikipedia
出典:『Wikipedia』 (2011/06/09 10:27 UTC 版)
A light-emitting diode (LED, /ˌɛl iː ˈdiː/ el-ee-dee) is a semiconductor light source. LEDs are used as indicator lamps in many devices and are increasingly used for other lighting. Introduced as a practical electronic component in 1962, early LEDs emitted low-intensity red light, but modern versions are available across the visible, ultraviolet and infrared wavelengths, with very high brightness.