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What are pixels ?

Pixel combines two words, ' pix' (picture) and 'el' (elements). Pixels can be referred to as 'dots' or squares, and these are the basic building blocks of a digital image.

When lots of these tiny dots/squares are put together, they form a digital image. Every single pixel has three sub-pixels in red, green, and blue color. Transistors carry electric current to the sub-pixels; this current is why the change of color changes in pixels.

Pixels compose the images displayed on the computer screen, television, laptop, video games, smartphones, and the list goes on. A pixel is the smallest controllable element of an image or display that a computer can print or display.

What are different types of pixels?

Following are the different type of pixels.

1. Dead pixel

A dead pixel is a picture element (on the display screen) in which all the colors RGB (red, green, and blue) are permanently turned off/ damaged; this creates a black spot in the display. The damaged pixel does not receive any power; hence the pixel turns black.

Dead pixels are black, and no matter how much your screen changes, these pixels remain fixed in one spot and won't change their color.

What are the reasons that cause dead pixels?

Dead pixels can result from manufacturing defects, physical damage, strong direct rays or light sources, etc.

Not even one dead pixel is acceptable as it is quite visible on the screen and causes disruption of the image quality. Dead pixels do not spread, but if there's more than one dead pixel visible on a screen, then there's a chance of some unread pressure.

What are the reasons that cause dead pixels?

Dead pixels are permanently damaged and cannot be fixed. Stuck and warm pixels can be fixed if proper measures are taken on time.

2. White pixel

White pixels are almost identical to dead pixels; the color is the main difference between the two. The color can identify white pixels on the screen.

Dead pixels can be black or sometimes white; white pixels are also known as Hot Pixels.

What are the reasons that cause white pixels?

White pixels are usually caused by the uneven distribution of liquid inside the screen/ monitor, manufacturing defects, malfunctioning transistors, or short-circuit.

How to fix white pixels?

White pixels are almost identical to dead pixels and cannot be fixed, just like the case with dead pixels. One has to replace the screen to deal with dead or white pixels.

3. Warm / Hot pixel

Warm pixels are not much different than white pixels. The only difference between the two is warm pixels follow the impinging light, whereas hot pixels don't. Warm and hot pixels can be termed neighborhood pixels.

Warm pixels also disrupt the image quality and can be seen as a spot, blur, or white square.

What are the reasons that cause warm pixels?

Hot pixels are always white; they are mainly caused by current transmission failure, transistors in stock (on/off) position, etc.

How to fix warm/ hot pixels?

Warm or hot pixels can be fixed by locating the area of warm/ hot pixel and then pressing a damp/semi damp cloth on the screen while applying light pressure on it (hard pressure can cause more damage rather than fixing the previous one) while the monitor is off, then turn the monitor on and remove the pressure.

Other ways of fixing the hot/ warm pixels include:

  • External software to change the color of pixels at a rapid speed.

  • Pressure method, to use a narrow object with a blunt end to tap the hot pixel lightly.

4. Stuck pixel

Stuck pixels are tiny dots/ squares that maintain a single color other than black or white. Usually, the fixed colors are red, green, or blue. Stuck pixels are stubborn and stay fixed at the place, but not always permanently, as stuck pixels can be fixed in different ways.

What are the reasons that cause stuck pixels?

Stuck pixels are caused by different reasons, including manufacturing defects, a transistor that's always on, hardware problems, or pressure due to the current supply.

Stuck pixels are easier to fix than dead pixels.

How to fix stuck pixels?

First, you need to determine whether the pixel is dead or stuck. Once it's clear that the pixel is stuck, the following methods can fix it.

  • Shutting down the monitor for 24 hours straight can be helpful if the pixel was recently stuck.

  • Screen fixing software can be used for more effective results.

  • The rapid change in colors (switching images at high speed).

  • Using pressure, heat, blunt object, etc.

Remember that stuck pixels are often fixed on their own without any outside assistance.

5. Dust particles

Dirt or dust particles get settled on the display screen and look like dead or stuck pixels as they block the light coming from the screen. These dust particles should be cleaned from time to time so that any further damage can be prevented.