Ultra-Fast Scanning External Cavity Tunable Laser Ultra-Fast Scanning External Cavity Tunable Laser,Tunable Diode Laser Analyzer,Applications Tunable Laser,Tunable O-Band Laser AcePhotonics Co.,Ltd. , https://www.acephotonics.com
Originally used as an indicator light source for instrumentation, LEDs of various light colors were widely used in traffic lights and large-area displays, resulting in good economic and social benefits. Take the 12-inch red traffic light as an example. In the United States, a long-life, low-efficiency 140-watt incandescent lamp was used as the light source, which produced 2000 lumens of white light. After passing the red filter, the light loss is 90%, leaving only 200 lumens of red light. In the newly designed lamp, Lumileds used 18 red LED sources, including circuit losses, to consume 14 watts of electricity, which produced the same light efficiency.
Automotive signal lights are also an important area for LED light source applications. In 1987, China began to install high-position brake lights on cars. Due to the fast response speed (nanoseconds) of LEDs, drivers of trailing vehicles can be informed of driving conditions and reduce the occurrence of rear-end collisions.
In addition, LED lights have been applied in outdoor red, green, and blue full-color displays, and key-type miniature flashlights.
1 