LCD Display

What is an LCD display?

LCD stands for “Liquid crystal display”. LCD is a flat panel display technology commonly used in TV’s and computer monitors. It is also used in screens for mobile devices, such as laptops, tablets and smartphones. LCD displays don’t just look different than bulky CRT monitors, the way they operate is significantly different as well. Instead of firing electrons at a glass screen, an LCD has a blacklight that provides light to individual pixels arranged in a rectangular grid. Each pixel has a red, green and blue RGB sub-pixel that can be turned on or off. When all of a pixels sub-pixels are turned off, it appears black. When all the sub-pixels are turned on 100%, it appears white. By adjusting the individual levels of red, green and blue, millions of colour combinations are possible.

What are they for?

They are used to create screens for various electronic devices such as:

• Laptops
• Tablets
• TV’s
• Smartphones
• Arduino kits

Where should you put them?

An LCD should be placed behind a screen. This is because a blacklight in liquid crystal display provides an even light source behind the screen. This light is polarised, meaning only half of the light shines through to the liquid crystal layer.