All about smartphone displays: technology and options

A smartphone can have a powerful filling and take excellent pictures, but the user will still not be completely satisfied with it, if the screen quality leaves much to be desired. Unfortunately, in terms of display characteristics, many buyers are complete ignoramuses. Therefore, it is so important to consider what types of smartphone displays are found and what parameters you need to pay attention to when choosing a gadget.


What are smartphone displays?

Previously, all touchscreen phone displays were classified into:

  1. Capacitive . The principle of operation is as follows: the user's finger transfers the charge, and the device software calculates in which particular area of ​​the screen the change occurred.
  2. Resistive . Behind the screen are two metal plates. When the first is pressed to the second, the smartphone responds. Smartphones with resistive screens often come with styluses .

The use of resistive displays was inconvenient, since pressing had to apply force. , некогда очень популярная среди представительниц прекрасного пола. Resistive displays finally disappeared from the windows in 2011, and the last “swallow” was the Samsung S 5230 Star , which was once very popular among the fair sex.

Common Display Technologies

There are such types of displays:


Screens made using this technology are mounted on budget gadgets. Image quality can be very decent, but some flaws will still be evident (for example, minimal viewing angles). The peculiarity of TFT displays is that they are not able to produce the perfect black color - only dark gray.


Advanced TFT technology, which guarantees high contrast, rich colors (in particular, black and white), large viewing angles. Recently, IPS-displays of phones are becoming more common - even Chinese sellers are abandoning TFT technology.


Matrix consisting of organic LEDs. This technology not only provides brighter colors than IPS, but also allows the smartphone to work longer offline, because black is formed by turning off part of the LEDs. AMOLED displays can usually be found in Samsung, which is not surprising, because it was the Korean company that developed them.


Samsung later improved the AMOLED display device by removing the air gap between the screen and the touch layer. Due to this, image detailing, color saturation have increased, and the display itself has become thinner. It is curious that the people called Super AMOLED screens “acidic” due to excessive brightness.


Such screens on smartphones are rare - one of the gadgets with a similar display was HTC One X. SLCD technology provides warm and rich colors, but it plants your smartphone faster than AMOLED and IPS.

What gives a screen resolution?

Any screen consists of a huge number of "squares" - pixels that fit snugly together. Each of the pixels in turn consists of 3 subpixels (subpixels): red (R), green (G), blue (B). As food is received, they mix in different proportions and give a certain color. You can calculate the number of pixels on a device’s screen by multiplying two display resolution settings: height and width. For example, an HD display ( 1280 * 720 ) consists of 921600 pixels. That is, the higher the resolution, the clearer the picture will be. On gadgets with a minimum resolution, the "squares" will be visible to the naked eye.

There is another indicator - DPI, which reflects the density of dots per inch of the screen. The DPI indicator when choosing a gadget needs to be paid even more attention than resolution, because the screen sizes of smartphones are different. Please note that a person with excellent vision and in ideal conditions can distinguish between a maximum density of 350 DPI. In real life, 250 DPI is enough. This means that for a smartphone with a diagonal of 4.5-5 inches, a display with HD resolution is abundant. Buying a gadget with steeper display characteristics will only lead to negative consequences: firstly, the buyer will overpay, and secondly, the smartphone will discharge faster.

Which screens are better?

Apple visionary Steve Jobs has determined that the most suitable screen size for a smartphone is 3.5 inches; This is exactly what the popular iPhone 4 and 4S models had. With a diagonal of 3.5 inches, the average user can reach with his thumb (which holds the gadget) even to the most distant point of the display.

However, to find a smartphone with such a diagonal is now possible only on the window with budget models. The trend of increasing display sizes continues to gain momentum - large companies are already releasing devices belonging to the class of smartphones, with screens as much as 6 inches! 4.7-5 inches are enough for comfortable work - a similar gadget can still be operated with one hand. A larger smartphone will be inconvenient both in use and when stored in your pocket.


When choosing a smartphone, you need to remember that chasing the outstanding display features is pointless - the owner of a device with a 4K screen resolution will not get any visible benefits. On the contrary, the user will be doomed to carry the memory all the time, since the battery life of the smartphone directly depends on the display settings.