About display resolution

Display resolution of a PC or MAC monitor, tablet, laptop, smartphone or any other display device is the number of distinct pixels in each dimension that can be displayed. High-density monitors or Retina monitors sold by Apple are generally recognized as having a physical pixel density greater than 200 pixels per inch. This means that they have twice the pixel density of a classic resolution computer monitor. Since 4K monitors for PCs hit the consumer market understanding pixel density has become important when choosing products along with screen size and screen resolution. Pixel density is the specification that defines how detailed a display is. It is expressed in units of PPI (Pixels Per Inch). There are currently two standards for 4K resolution, “DCI 4K” and “UHD 4K”.

4K is not standardized description of a number of physical pixels. It’s an approximation of the number of pixels wide something is (as opposed to the previous convention of how many pixels tall as in 480p, 720p, 1080p, etc.). Something with somewhere around 4000 pixels wide will be called 4K. So you have a variety starting from 3840 pixels up to at least 5120 pixels on “ultrawide 4K” displays, broadcasts, or video. 

PPI is typically used for LCD panel specs. For example 96dpi means that 96 dots are placed in a 1 inch (2.54 cm) length. The level of detail that you can see on the screen depends on the distance it is viewed from (e.g. viewing a monitor versus a smartphone), so whether or not a certain PPI is high resolution or not depends on the device. However in general the larger the PPI value, the higher the definition. 

The "number of pixels", or put another way "the number of points that light up", in an LCD screen is decided, and this "number of pixels" is the "native resolution." For example, this means that a monitor with a native resolution of "1920 × 1200" lights up, or turns off, 1920 horizontal rows (dots) and 1200 vertical rows (dots) of pixels to display images.

Both the monitor and the video card have various resolutions, and we recommend that you bear in mind what we have said in this article and correctly adjust the monitor to put as little strain as possible on the eyes.