Small mobile phone science-2K, 1080P and 720P effect on mobile phone difference

The screen size and resolution of smartphones has been rising: 720P began to appear and become popular in 2011, and last year 1080P became mainstream and will be upgraded to 2K (Quad HD or 1440P) standards this year. In fact, including Vivo, oppo and other domestic manufacturers have launched 2K mobile phones, all kinds of data also shows LG G3 will be equipped with 2K screen, is expected to bring large-scale mobile phone screen resolution upgrade tide ...

From the parameters, 2560*1440 resolution of the total number of pixels is 1920*1080 1.7 times times, will bring users more detailed text, pictures and clearer video effects. However, because the human eye in a certain viewing distance is actually a resolution limit, especially in the mobile phone screen size is limited. So, should 2K screen be the essential element of your next phone, and is it practical? Let's take a look at our analysis.

First, let's start with the Apple IPhone 4, which first presents the concept of "retina retina." As Apple achieved the 960*640 resolution on a 3.5-inch screen, the screen pixel density reached 326ppi, close to the recognition limit of human eye resolution, so it was named "Retina". Of course, this data varies with the size and resolution of the screen, and we can refer to the pixel density data of the popular phone:

Apple iphone 4-5s:326ppi
Samsung Galaxy S3 (4.8 inches, 720P): 306ppi
Samsung Galaxy S4 (5 inches, 1080P): 441ppi
Samsung Galaxy Note 3 (5.7 inches, 1080P): 386ppi

In addition, if according to Apple, the human eye recognition limit is about 300ppi, apparently Samsung S4 441ppi has far exceeded, which is why in the television industry, generally think 55 inches below the 4K screen and 1080P screen is almost no viewing difference.

Obviously, another factor associated with screen viewing is viewing distance. Of course, everyone's vision is different, and here we assume a 20/20 normal vision (within 20 feet, 6 meters, to see things), and models to demonstrate the ideal viewing distance from 480P to 2K screens. 480P Mobile Phone (4 ft 480*320 pixel), can see the screen details about 37.4 centimeters from the eyes 720P mobile phone (4.7 ft 1280*720 pixels), can be about 28 centimeters from the eye of the screen details 1080P mobile phone (5 ft 1920*1080 pixels), Can see the screen details about 19.8 centimeters from the eye. 2K mobile Phone (5.5 ft 2560*1440 pixel), can see the screen details about 16.4 centimeters from the eye

Obviously, no one will always be on the phone screen to watch, long-term use will feel very tired. In other words, using a 5.5-foot 2K phone, you need to be closer to the screen to see the details of the text, icons and so on, of course, if the screen area increases, you can increase the viewing distance appropriately.

The results from the above test seem to be the same as for 4K TVs: 2K resolution is more useful on large size phones, while the 5.5-6.4-inch 2K screen and the 5-inch 1080P screen of Samsung S5 are almost identical under conventional viewing distances.

The results are not so happy, it seems that the 2K screen in the case of limited mobile phone size, it is still a marketing advantage, rather than enhance the focus of mobile phone use experience. But to be sure, in the mobile phone hardware upgrade has been facing bottlenecks, manufacturers will seize all available elements to marketing, 2K screen is clearly an element. From the current domestic two 2K mobile phone actual effect, the difference and 1080P mobile phone is not small, we also look forward to the second half of the listed 2K mobile phones will bring some more obvious advantages, so that 2K screen more practical significance.