This chapter understands several questions:
- screen resolution;
- what is 720, 1080 screen;
- mobile phone screen size meaning;
- what is pixel density ppi
It can be said that as long as the screen has a resolution, then what is the screen resolution?
☛ screen resolution refers to the number of pixels in the vertical and horizontal directions, the unit is px . It is expressed in horizontal and vertical pixels. For example, the early screen resolution is 640 x 480, which means that the length is 640 and the width is 480 units. On the other hand, the pixel displayed on the screen of the same size is less, and the size of a single pixel is relatively large. On the contrary, there are many pixels displayed on the screen and the size of a single pixel is relatively small.
can get this answer: the same size screen, then the higher the resolution, the better.
☛ 720 screen, 1080 screen.
Obviously 720 and 1080 both represent the resolution of the screen. The 1080 screen has a lot more pixels. The usual 1280*720=921600, and 1920*1080=2073600, which is 2.25 times of 1280*720.
The more pixels and the higher the resolution of the screen, the better the display of the mobile phone screen.
At present, the 1080 screen of mobile phones is the mainstream configuration. Although the resolution of many mobile phones is not expressed in 1920*1080, the back of it is also 1080, so it is a 1080 screen.For example, the resolution of Redmi K40 is 2400*1080, which is also a 1080 screen.
Various mobile phone manufacturers are also increasing the resolution of their screens. There are also 2K screens (ie 2560*1440 resolution) of many mobile phones. Only those with a horizontal pixel greater than 2000 can be called 2k screens.
In 2014, the world's first 2K screen vivo Xplay3S was released. Afterwards, many manufacturers tested the water. Such as Moto X Pro, Coolpad, HTC One M9+, OPPO Find 7 standard version, Samsung GALAXY S6 telecom version, Xiaomi 11 and other models.
☛ What does the screen size of the mobile phone mean.
When buying a mobile phone, many friends care about the size of the screen, and usually the screen of a mobile phone is expressed by an inch. It does not indicate the length of the screen, nor the width of the screen, but the diagonal length of the screen. This method of expression is common to computer displays and other displays.
How many centimeters are 6.67 inches in the picture above?
1 inch = 2.54 cm, then 6.67*2.54=16.94 (cm).
☛ Pixel density ppi.
Many mobile phones did not display this parameter before, mainly because the parameters are too shabby. It seems that Apple mobile phones like to mark it. But now many domestic mobile phone manufacturers have begun to label, indicating that the pixel density of domestic mobile phones is much higher, and they dare to take it out.
The pixel density value of the mobile phone screen represents the number of pixels per inch. Naturally, the larger the better, the calculation formula: ppi=√(X^2+Y^2)/ Z (X: length pixels; Y: Width in pixels; Z: screen size).
It can be seen from the formula that ppi is related to the number of pixels and the size of the screen. The same number of pixels and the smaller the screen,The higher the ppi, the better the screen rendering effect .
The screens of Apple mobile phones have so far been small, except for screen price factors. It also has a great relationship with the display effect of the screen, which is why some friends think that the Apple mobile phone screen is good.
usually has a ppi of more than 300, which is difficult to distinguish with the naked eye. The ppi of Apple mobile phone screens has always been high. For example, the iPhone 12 has reached 460 ppi, and the iPhone 12 mini has 476 ppi.
Well, the four questions in this chapter are also simply answered, are you clear?
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