All about smartphone displays: technologies and parameters

Smartphone can be just as powerful stuffing and take excellent pictures, but the user still not be completely happy if the screen quality is poor. Unfortunately, in terms of the characteristics of the display a buyers — complete ignoramus. Therefore, it is important to consider what types of smartphone displays meet and what parameters need to pay attention to when choosing a gadget.

What are the displays of smartphones?

All displays earlier touchscreen phones were classified into:

  1. Capacitive. The principle of operation is that a user's finger passes the charge, and the device calculates what area of the screen the change occurred.
  2. RC. Behind the screen are two metal plates. When the first is pressed to the second, the smartphone reacts. To smartphones with resistive screens are often attached stylus.

the Use of resistive displays have been uncomfortable, since the press had to use force. Resistive displays finally disappeared from shop Windows in 2011, and the last "sign" was the model Samsung S5230 Star, once very popular among the fair sex.

Common display technology

Some display types:


Screens manufactured according to this technology, are mounted in budget gadgets. Image quality can be very decent, but some flaws will still be evident (e.g., minimum angles). Feature TFT displays is that they are not able to give an ideal black – just dark grey.


Advanced TFT technology, which ensures high-contrast, saturated colors (particularly black and white), large viewing angles. Lately IPS-display the phones are more common – even Chinese sellers refuse to TFT technology.


A matrix consisting of organic LEDs. This technology not only provides brighter colors than IPS, but also allows the smartphone to longer work offline, because black color is formed by turning off the part of the LEDs. Samsung galaxy usually can be found on the Samsung that is not surprising, because the Korean company develop them.


Later Samsung improved device of AMOLED displays, removing an air layer between the screen and touch layer. Due to this increased image detail, the saturation of colors, and the display itself is thinner. Interestingly, in people, the Super AMOLED screens are called "acidic" due to excessive brightness.


The screens on smartphones are rare – one of the gadgets with such display was HTC One X. Technology SLCD provides a warm and saturated colors, but planting a smartphone faster than AMOLED and IPS.

Which gives the screen resolution?

Any screen consists of a huge number of "squares" — pixels that are closely adjacent to each other. Each pixel in turn consists of 3 podpisala (sub): red (R), green (G), blue (B). Upon receipt of the power they are mixed in different proportions and give some color. To count the number of pixels on the device screen by multiplying the two parameters display resolution: width and height. For example, the HD display (1280 * 720) consists of 921600 pixels. That is, the higher the resolution, the clearer will be the picture. On gadgets with a minimum resolution boxes are visible to the naked eye.

There is another indicator – DPI, reflecting the density of dots per inch of the screen. Indicator DPI when you select the gadget you need to pay even more attention than the resolution, because the screen sizes of smartphones are different. Please note that the person with superior vision and in ideal conditions is able to distinguish density up to a maximum of 350 DPI. In real conditions will suffice to 250 DPI. This means that for a smartphone with a diagonal of 4.5-5 inch display with HD resolution abound. Buying a gadget with more "cool" characteristics of the display device will only lead to negative consequences: first, the buyer overpaid, and second, the smartphone will be faster discharged.

Screens what size is better?

Visionary of Apple, Steve jobs has determined that the most appropriate screen size for a smartphone is 3.5 inches; such was the popular model iPhone 4 and 4S. At a diagonal of 3.5 inches, the average user can reach with your thumb (which holds the gadget), even to the most distant point of the display.

However, to find a smartphone this size is now possible only in the window with the budget models. The trend of increasing display sizes continues to gain speed – large companies have already released devices belonging to the class of smartphones with screens as much as 6 inches! For comfortable work enough 4.7-5 inch – like gadget can still be operated with one hand. Smartphone larger will be uncomfortable as when using and when storing in your pocket.


When choosing a smartphone you need to remember that to chase the outstanding characteristics of the display device is meaningless – there are no visible advantages to the owner of the device with a screen resolution of 4K will not receive. On the contrary, the user will be doomed to constant wearing of the memory, as the battery life of a smartphone depends on the display settings.