LCD vs LED vs OLED : What is the Difference

Written by : Ayush Bharal

Display technologies have advanced very much. In old times we used CRT display technology, it made TV’s very big and fat and there was no question to fit that into mobile phones. As the advancements happened, new technologies like LCD, LED and OLED arrived. They reduced the thickness of TV so much that now a days TV’s can actually be folded. So the question arrives which display technology is best of all ? Let’s see :

LCD

It refers to liquid crystal display.In this technology, a white backlight is provided to an arrangement of liquid crystals which can be oriented in different directions which bend the white light into different directions. This bending of light in different directions produce different colours. The combination of these colours appear as images on your screen.

There are many drawbacks of this technology. It requires many layers for backlight, crystals, polariser, etc. that make the display somewhat thicker. The display do not have great viewing angles. And lastly, due to the crystals, the colours are not accurate and the black areas look like dark grey as some of the backlight leaks from behind the crystals.

To overcome these difficulties, a new display technology (LED) arrived.

LED

LED refers to Light Emitting Diode. This display does not need any backlight instead it uses an arrangement of extremely small LED lights which produce their own light. These lights are of three different colours – Red, Green and Blue. The combination of these colours create different colours and images.

It introduced high contrast ratio that means brighter white colour and darker black colour. It also had higher viewing angles. It was also thinner than LCD.

There were some disadvantages of LED. Firstly, production errors were too much which caused inconsistent cotrast ratio. Also LED display colours used to become dull after some time of usage.

So it was the time for the new technology (OLED) to come.

OLED

OLED refer to Organic LED. It is the same LED technology but it is covered with some organic compound that increases the life of display panel and creates higher contrast ratio. The LED arrangement is little different so it makes the OLED display a little bit thinner.

Its advantages include thinner panel, higher contrast ratio and increased usage time of the display. This technology helped the display panel to be flexible which made the folding phone possible.

There was a disadvantage that after long time usage, display starts burning at white points on panel.

There are some other forms of LED such as AMOLED, Super AMOLED, etc.

The Future

A new display technology is being developed. Its name is Micro-LED and the company behind its development is Apple. This technology is burning free, can easily be folded and it merges many layers of display which make it even more thinner. It is rumoured that Apple will launch a 6K display with Micro-LED before the end of the year and until 2020, Apple will be launching a Micro-LED iPad. . This creates a hope that future of display technology is very bright.

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