What are micro LED Display

• MicroLED is a technology that helps a display to produce brighter and higher-contrast images that are not possible with other known technologies.
• It is an emerging flat-panel display technology consisting of arrays of microscopic LEDs forming the individual pixel elements.
• The basis of microLED technology are sapphires. 
• A sapphire can shine on its own forever. 
• A microLED screen is filled with such small but strong light.
• The picture in a microLED screen is generated by several individual light-emitting diodes.

How it works

• A microLED is as small as cutting a centimetre of hair into 200 smaller pieces.
• Each of these microLEDs are semiconductors that receive electrical signals. 
• Once these microLEDs are gathered, they form a module.
•  Several modules are then combined to form screens.

Advantages

• Manufacturers claim that the microLED panel format has multiple advantages which include increased brightness, longer life-span and lower power consumption.
• MicroLED displays are brighter, have better colour reproduction and provide better viewing angles. 
• They make images appear as if they painted on top of the device’s glass and are quite the technological feat
• MicroLEDs have limitless scalability, as they are resolution-free, bezel-free, ratio-free, and even size-free.
• The screen can be freely resized in any form for practical usage.

https://www.thehindu.com/sci-tech/technology/what-are-microled-displays-and-why-is-apple-shifting-to-it/article66500256.ece