Tech Science: Shedding Light on Light Emitting Diodes

Light-emitting diodes are everywhere these days. This technology makes up the screens that you use all the time. Text Graphic: Samsung Presents/ Tech Science/ Shedding Light on Light Emitting Diodes LED displays are a constant part of our lives today. They are found in TVs, smartphones, tablets, even wristwatches. It is hard to imagine how we lived without them. But have you ever stopped and wondered how they work? Let’s say you are using a tablet. The LED part is what makes the words and images that you see. But in order to see the liquid crystals, an LED screen needs a light source. This backlight used to be provided by cold-cathode fluorescent lamps, which were larger and less effective. Now we use LEDs, which allow for thinner, lighter, and brighter screens. But recently, some brainy engineers created the Active-Matrix Organic Light-Emitting Diode, or AMOLED. This technology allows for a light, energy-efficient screen with vibrant colors and sharp contrast. So how does it work? AMOLED screens are made of organic polymers. Instead of needing a separate light source, these polymers emit their own light when exposed to an electrical current. AMOLED screens can also save precious battery life. Instead of creating a black pixel, the organic polymer simply turns off. Great clarity? Long battery life? AMOLED screens are definitely the way of the future. Want to learn more? Keep watching Tech Science.

LED, you hear the term everywhere but what exactly does it mean? Learn more about this technology on Tech Science.

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