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The first visible-light LEDs were of low intensity and limited to red. Early LEDs were often used as indicator lamps, replacing small incandescent bulbs, and in seven-segment displays.
- Light-emitting Diode Physics
The most common symptom of LED failure is the gradual...
- Led Wallpaper
LED wallpaper. LED wallpaper is the integration of...
- Cat's-Whisker Detector
Crystal radios had no amplifying components to increase the...
- Seven-segment Display
A typical 7-segment LED display component, with decimal...
- Oleg Losev
Employees of the Central Radio Laboratory, Leningrad, 1930....
- Electroluminescence
Spectrum of a blue/green electroluminescent light source for...
- H. J. Round
Captain Henry Joseph Round MC (2 June 1881 – 17 August 1966)...
- Phosphor
Example of phosphorescence Monochrome monitor Aperture...
- Light-emitting Diode Physics
A light-emitting diode (LED) is a semiconductor device that produces light from electricity. LEDs last a long time and do not break easily (compared to incandescent lightbulbs ). They can produce many different colors.
In electronics, an LED circuit or LED driver is an electrical circuit used to power a light-emitting diode (LED). The circuit must provide sufficient current to light the LED at the required brightness, but must limit the current to prevent damaging the LED.
An LED lamp or LED light [1] is an electric light that produces light using light-emitting diodes (LEDs). LED lamps are significantly more energy-efficient than equivalent incandescent lamps and fluorescent lamps.
The forward voltage drop (about 1.7 V for a red LED or 1.2V for an infrared) can be used instead of a Zener diode in low-voltage regulators. Red LEDs have the flattest I/V curve above the knee. Nitride-based LEDs have a fairly steep I/V curve and are useless for this purpose.
Light Emitting Diodes (LEDs) are light sources made from semiconductor devices. LEDs are gradually becoming the most popular light sources used in households, cars, and public lighting. They are …
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.
