Problems
that, despite their smallness, are difficult to solve so easily are among the
most worrying and annoying problems for the user, especially if they are caused
by manufacturing, and the problem of dead pixels is one of the most annoying
problems if it occurs. Once you notice it's happening, it will become a
constant annoyance whenever you look at the screen despite it being only one
dead pixel among millions of healthy pixels. Before we explain in detail this
problem, it must be noted that there are three types of pixel problems (dead,
stuck, and always high brightness) - not just dead pixels! But the worst of
those problems is a dead pixel.
What is a pixel originally … and how does it work?
A
pixel, or an image element, is defined as the smallest component of a display
screen, as well as its primary component, and thus it can be said that pixels
are the building blocks of any image you see on the screen. The number of these
pixels represents the screen resolution, the more pixels we have, the higher
the screen resolution. To approximate the idea more, imagine the screen as a
puzzle and you have small pieces of this puzzle, each of which represents a
part of it and together they give you the complete puzzle. Here the pieces of
the puzzle represent the pixels, and therefore the larger the number, the
clearer the details of the image.
Now,
back to the puzzle as a whole, that is, the screen, in particular, the LCD
screens. They work through two filters between them, a liquid layer called
"liquid crystal", because that liquid has the properties of a
crystal, and behind that composition, we find the light source, where the
resulting light expresses the composition that we talked about through each
layer, where it is modified Each layer uses electrons to emit light or not to
emit light or a gradient between the two previous cases, and they are called
Electrodes (electrodes) and in the case of colors we add three layers of
filters.
Usually,
it refers to the colors green, red, blue, and then by adjusting the number of
electrons that cross each color layer, the saturation, and chromatic intensity
can be modified and thus obtaining a color, and thus here the pixel is composed
of three electrons, each of which is assigned to the color of the three
previously mentioned colors.
Pixel Problem: Stuck, Dead High Brightness!
As
I mentioned at the beginning of the article, there are several types of
problems related to pixels and not only the problem of dead ones, and with a
quick review of it, we find that the problem of a high-brightness pixel always
occurs due to allowing light to pass through regardless of what is displayed on
the screen, while the problem of a stuck pixel means that one pixel One or more
is stuck on a specific color (blue, green, or red) instead of updating with
what is displayed on the screen, and it is also considered one of the most
common problems, but the worst of them all is the dead pixel problem.
What is the dead pixel and what caused the problem?
The
death of a pixel means that the transistor responsible for powering it has
collapsed, so when the transistor that powers that pixel fails with enough
power to work, that pixel will remain black or appear off, so we say it is
dead. In other words, the dead pixels problem can be said as a phenomenon that
occurs when the device fails to change color, the pixels are designed to change
color according to what is displayed on the screen, and therefore when the
computer displays an image, the pixels are responsible for setting the correct
colors for that image, and therefore when a pixel fails If the color changes,
it is considered dead.
And
you can distinguish the dead pixel on your screen as being black unlike the
rest of the screen pixels, regardless of what is displayed on it at that
moment, and you can display a high contrast image or a completely white image
and the dead pixels will appear to you.
But, what is the cause of this problem?
In
fact, there are several reasons, the first of which is a specific manufacturing
defect or a problem in transmitting the device, and this reason is the most
common reason, and the second most common reason is due to the problems of
electrical supply. The color has changed and therefore if this power source is
cut off, the pixel can turn black and thus a dead pixel.
Here,
specifically at this point, a question may arise in your mind, which is how to
distinguish between the problem of the dead pixel and the problem of the stuck
pixel (I mean the stuck pixel here is the stability of the color of the pixel
without changing) The difference is that, as I mentioned in the case of the
dead pixel, the color of the pixel is black, but in the case of Stuck is
usually either green, red, or blue.
Can the dead pixel problem be fixed?
In
fact, since it is a manufacturing problem that prevents nutrition from reaching
the pixel, which leads to it staying black, there are no specific solutions
that will bring that pixel back to life, but there are many things that you can
be sure of and thus prevent you from falling into this problem in the future.
First,
make sure of the source of your monitor or device by choosing a high-quality
screen type and avoid buying from unknown manufacturers, as it is better to choose
a well-known and reliable source. Secondly, you can avoid this problem by
protecting your device from any physical harm such as shocks that may cause the
pixels to lose their nutrition, and finally in the event that this problem
occurs, you have to replace the screen.