Oled Display Arduino.How do you evaluate the monitor? When you choose and buy a monitor, you usually read the evaluation articles about the relevant products. As the evaluation article will involve some relatively professional content, it will make people have similar questions.

Many people think that the bigger the screen, the better, but this is not the case. First of all, the relationship between screen size and resolution is not proportional, and the resolution of a large screen is not necessarily higher than that of a small screen.

Resolution, as the most important parameter of the display, directly affects the clarity of the picture. At present, the common resolutions are 1920 × 1080, 2560 × 1440, 3840 × 2160, and the commonly said 2K is 2560 × 1440 in general, while 4K generally refers to 3840 × 2160.

When we look at different resolution monitors, we will find that some monitors look grainy, while others do not. This is because the picture itself is composed of a lot of pixels, and the two values before and after the resolution “x” represent the number of pixels horizontally and vertically on the display. For the same 27-inch display, the greater the number of pixels, the greater the pixel density (PPI).

For example, a 27-inch 1920 × 1080 resolution display can be calculated to have a pixel density of 81.95, while a 2560 × 1440 resolution display of the same size has a pixel density of 109, so it will be clearer in terms of appearance.

If divided from the use of the display, in addition to excluding household and commercial displays with relatively ordinary performance, they can generally be divided into two types: e-sports displays and professional displays, because the user groups are different, so the two types of displays have completely different emphasis on performance and function.