Why do Monitors use RGB

Why do monitors use RGB

Monitors are part of our daily life. They are everywhere, as computers and other devices that are connected to them (like security cameras, baby monitors, advertising monitors, and many more) and they are all around us.

They show the information provided by other electrical components, in the PC this is the graphics card or also called GPU. The GPU sends the information, which is interpreted by the monitor to show a specific image and a certain refresh rate.

Monitors have high resolutions such as 4k 5k 8k and many different. They have really high refresh rates 60, 120, 240Hz, and more. One very often used therm when talking about them is the RGB, so what does RGB mean?

What is an RGB

The RGB is standard of combining several colors, which can yield millions of others. RGB stands for RED GREEN BLUE, which are the three main colors of each pixel, and when they are combined in different intensity they can achieve more than 16 million colors.

We get that number by multiplying each of the three main colors or 256 * 256 * 256. We have 256 different shades of color because one byte has 8 bits, which actually has a maximum value of 256. 256th value is the maximum density of the color, and first is the minimum, when we have RGB set at 0,0,0 it is actually black, since this means there is no color illumination.

So when we get 255,255,255 (the 256th value since we start from 0) we have a maximum brightness of red, green and blue, and we get white.

What is an LED

LED is the technology most used in the majority of displays and monitors nowadays. It has many advantages as it has low heat output, it is really durable and consumes a lot less energy. LED stands for light-emitting diode.

Your monitor has millions of pixels (depending on its resolution and DPI), which are tiny dots that have each of the three main colors made by a diode that emits light. So when you see a black screen, you see millions of LEDs that are turned off (their value of each of the colors is 0) and when you see the color red, for example, you see 255,0,0. And of course when you see mixed colors such as purple you get 128,0,128 (Red=50%,Green=0%,Blue=50%).

How are monitors made

Each monitor has few main components:

The display is where the LEDs are located. Each pixel of your monitor has three different LEDs which represent the RGB colors. When the GPU of the computer calculates and sends the necessary information, the monitor’s electrical components receive and interpret the information and send the information to each pixel so that they mix the color values at specific numbers.

By doing so, you can see an image, and if you are looking at a video or if let’s say you are moving your mouse on the screen, the pixels change their colors accordingly to represent the movement. The speed of movement is actually dependent on the refresh rate of the monitor.

The refresh rates are measured in Hz and represent the number of times a monitor refreshes its frame of the image each second. So a 60Hz monitor refreshes its image 60 times each second.

Why is RGB used in monitors

RGB is a standard, that is commonly used. It is connected with other areas of the arts and graphic industry in general. So in order to simplify and keep the process and workflow working together, the standard is the same in monitors and other displays, such as cell phones, tablets, and others.

How is color represented by LED

To get a color the RGB standard simply mixes different shades of each of the main red, green and blue colors. So for instance, if you want to get the red color you would simply get 255,0,0 this would mean you have full brightness red LED on and 0 brightness green and blue.

To get different colors, such as yellow for example we need to mix red and green, so we get 255,255,0 – full brightness red, full brightness green, and 0 brightness blue color.

Here are some other main colors and their value: