The LCD panel consists of millions of liquid crystals, and it is from there it got its name, Liquid Crystal Display. The panel sends electrical charges to the crystals. Depending on the current, which can be varied for each individual crystal, the crystal permits different amounts of light. If no light is passed through, the crystal is perceived as black. As mentioned, an LCD screen does not generate its own light, but must in some way be illuminated from behind. This is where LED comes into the picture, literally.
Color without filters
The big difference between LCD TV and LED TV is how to illuminate the screen so that the different colors of the pixels are visible. An ordinary LCD TV uses Cold CathodeFlourescentLamps, a type of fluorescent lamp, such as a light source, CCFL. CCFL sits behind the LCD panel. They cannot be made as small as possible, giving the screen some thickness. In addition, several environmentally hazardous materials are included in the production, which you want to avoid as much as possible. An LED TV uses light emitting diodes.
LEDs are a type of semiconductor LED that emits light when current is passed through them. They can be manufactured in different colors without the use of filters or color, by using different materials for the light generation itself, which is an advantage.
LEDs provide benefits
LEDs often replace light bulbs in e.g. traffic lights, bicycle lights and flashlights, indicator lights and also in remote controls and vehicle lights. By using LEDs as a light source in an LED TV, you gain many advantages. For example, the LEDs draw less power and do not contain harmful substances that the cold-cathode lamps do. The LEDs can also be made very small and last very long, emit very little heat and can easily be turned on or off, or dimmed, to create very high contrasts in the TV picture. Samsung has already used LEDs to backlight LCD TVs, but with the LED TV series it takes it to a whole new level. In all Samsung LED TVs, the LEDs are placed around the screen, and the light is advanced in an advanced way behind the screen to illuminate the pixels. In this way, the TV can be made extremely thin.
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