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Monday, 12 July 2021

Working Principle of LED Display

LED DISPLAY UNIT:


While both types of TVs use LCD technology and feature flat-panel designs, LED TV is a more sophisticated form of LCD TV. LED TVs use LED backlighting to illuminate LCDs, making them smaller, brighter, and more detailed than standard LCD TVs. However, not all LED televisions have the same backlighting.


LED television sets have redefined the watching experience in a whole new and improved way. LED displays are even smaller and lighter than LCDs. The operating mechanism of LED televisions is similar to that of LCD televisions. LED televisions may be thought of as a more advanced version of LCD televisions. LED TVs have reduced the disadvantages of LCD TVs.


The fluorescent bulbs in the LCD television took up a lot of space and were heavy, and they didn't always give good colour quality. These flaws have been overcome by LED televisions, which employ an array of LEDs to produce backlighting, as depicted in the figure. LED televisions take up less space than LCD televisions and are thus smaller and lighter. The LEDs may also display the most accurate black-and-white picture.


There are two types of LED TVs on the market right now. One is backlit, and it gets its backlighting from a slew of LEDs mounted on the back of the television display. The other is edge lighted, which gets its illumination from LEDs positioned around the borders of the television display. Edge-lit LED TVs are significantly slimmer than back-lit LED TVs. As a result, edge-lit LED TVs use less energy and are more efficient.


LED TVs use light-emitting diodes to illuminate their LCD panels. LEDs are made up of tiny semiconductors that light when exposed to electricity. The LED TV may change the alignment of the liquid crystal when an electric current is provided to a tiny specified location of the liquid crystal layer.

General concept of LED

This current travels between LED anodes and LED cathodes, which are positively and negatively charged electrodes, respectively. A conventional LCD TV, on the other hand, is backlit by fluorescent lights. These lamps work by emitting ultraviolet rays from mercury vapour, which light up the lamp's phosphor coating.


Unlike pure LED systems, LED-backlit LCDs are self-illuminating. There are several ways to backlight an LCD panel with LEDs, including using white or RGB (Red, Green, and Blue) LED arrays behind the panel, and edge LED lighting, which uses white LEDs arranged around the inside frame of the TV and a light diffusion panel to spread the light evenly behind the LCD panel.


LED Display Features:


1. Reduced energy usage

2. A more evenly distributed colour saturation

3. Creates a picture with a wider dynamic range.

4. a thinner panel

5. More efficient heat dissipation

6. A more vibrant display

7. Increased contrast

8. There are more options available.

9. Less pollution in the environment

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