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Stated very simply, an LED produces light when an electrical current passes through a microchip, which illuminates the tiny light sources called LEDs and the result is visible light. For a complete explanation, see How Light Emitting Diodes Work .
- Sustainable Technologies at Home
LED light bulbs have taken over the market. But what are...
- Light-Emitting Diodes
Light emitting diodes form the numbers on digital clocks,...
- Sustainable Technologies at Home
- Types of LEDs
- Who Invented LEDs?
- What's So Good About LEDs?
- What Next For LEDs?
Photos (above and below): LEDs are transparent so light will passthrough them. You can see the two electrical contacts at one endand the rounded lensat the other end. The lens helps the LED to produce a bright, focused beam of light—just like a miniature light bulb. LEDs are specifically designed so they make light of a certainwavelength and they'r...
Whom should we thank for this fantastic little invention? Nick Holonyak: he came up with the idea of the light-emitting diode in 1962 while he was working for the General Electric Company. You might like to watch a short (4-minute) video aboutNick Holonyak's life and workand his thoughts aboutthe future of LEDs (courtesy of the Lemelson Foundation)...
In a nutshell: 1. They're tiny and relatively inexpensive. 2. They're easy to control electronically. 3. They last virtually forever. That makes them brilliant for traffic signals. 4. They make light electronically without getting hot and that means they save lots of energy. Photo: The red LEDs shining down from the top of this container are being ...
It's the best part of five decades since Nick Holonyak invented the LED, but the technology is still developing.In the 1970s, scientists discovered they could make LEDs from organic (carbon-based) materials, giving riseto OLEDs (organic LEDs) that are now becoming popular in thin, flat, and sometimes even flexible displays. Two decades later, three...
Light emitting diodes form the numbers on digital clocks, send data from remote controls and light up traffic signals. Find out how LEDs work.
May 17, 2023 · In this article, we'll explain LED technology in an easy to understand way. We'll cover the different types of LED lights, the different colors that LEDs can emit, and the different applications for LED technology and how they work.
A SIMPLE explanation of Light Emitting Diodes (LEDs). We go over the working of LEDs, how LED lights work – plus an LED working principle animation.
- 7 min
- 338.6K
- Electrical4U
An LED must be connected in a circuit the right way around – observe the polarity of the LED. The way that the schematic symbol of the LED maps to the physical LED is shown in the diagram below: On the physical LED, the longer lead (or leg) of the LED is the anode.
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Feb 24, 2012 · How Does a Light Emitting Diode (LED) Work? When the forward biased current I F is applied through the p-n junction of the diode , minority carrier electrons are injected into the p-region and corresponding minority carrier electrons are injected into the n-region.