Pixel Perfect: A Deep Dive into LCD, LED, and AMOLED Displays

 

Figure 1. The illustration of the monitor display when zooming down to pixel level will find the fact that each pixel is made up of 3 sub-colours.

Have you ever wondered what is going on beneath the surface of your TV, your computer monitors or the screen of your mobile phone? In this blog we take a microscopic journey into the world of screen technology, zooming in on the individual pixels that make up LCD (Liquid Crystal Display), LED (Light-Emitting Diode Display) and AMOLED (Active-Matrix Organic Light-Emitting Diode Display) screens. Between LCD, LED, and AMOLED components have the same task as display output to provide a visual output for the Brain ware. LCDs, LEDs and AMOLEDs have the same pixel structure where each pixel consists of three sub-pixels (red, green, and blue). Each sub-pixel is controlled by transistors to give the variation of brightness level for each sub-pixel. As shown in Figure 1, each pixel has 3 sub-pixels. It means if the LCD has the resolution of 1366 x 768 pixels, the LCD has 1366 x 768 x 3 or amount 3.147.264 subpixels that must controlled. The transistor that controls the brightness of the sub-pixels is in the range between 0 and 255. If the sub-pixel is triggered with the 0 level it will make the sub-pixel to be off, otherwise if the sub-pixels are triggered with the maximum number of 255 it will make the sub-pixels to be on and shining very brightly. The combination of colour primers that are on in each level will give the variation of spectrum colour. If three sub-colours in every pixel is triggered with 0, the colour of the pixel will appear black, otherwise, if the three sub-colours with the level trigger is 255, the light colour on the pixel will appear white colour.