Recently, vivo APEX can be said to have exploded the technology circle, with its advanced design, up to 98% of the screen ratio, stunning people. However, some careful little friends found that the vest of the vivo APEX is still narrow, but it still exists. But the iPhoneX released last year is really without a chin. How did it do it?
The first thing to know is why a normal mobile phone must have a chin?
Some people say that this is because there are buttons, such as the HOME button of the iPhone. Although there is a certain relationship, this is not the main one. The reason why the mobile phone has a chin is actually because of the way the screen itself is packaged.
What is "package"?
Simply put, a screen is produced, which itself does not display an image. If you want the screen to display a specific image, you need a corresponding "control circuit", which we call "driver IC", usually one or more chips, as shown below:
It can be seen that there is a row of chips below the panel, which is the "drive IC and printed circuit board" marked in red. It is responsible for receiving image data to be displayed through a circuit (generally a flexible cable), and then the control panel displays the corresponding color at the corresponding position to form an image.
For mobile phones, although the screen size they carry is relatively small, the basic structure does not change, and there must be such a driver IC on one side of the screen.
This process of combining the screen panel with the driver IC and turning it into a "direct" screen is called packaging. The packaging method mentioned above is called COG encapsulation.
For the previous mobile phones, there is no problem with COG packaging. After all, they not only have big chins, but also high foreheads, and some places put these things down. Just like the iPhone screen, its driver IC and soft cable are at the top of the screen:
This is why the recently hot Millet MIX2 claims to be a full screen, but there are still reasons for the chin: the handset can be reduced, the buttons can be used virtual, but the screen driver IC can not be undone.
So, how does the iPhone X remove the chin?
In fact, Apple's solution is very violent, clever, but very useful:
That's right, using an exclusive custom-made flexible screen, and then bending a part of the lower part of the screen, so that the part of the driver IC is placed on the back of the screen, it will not take up extra space.
The position marked by the red box in the above figure is the location of the iPhone X screen driver IC. In this way, the iPhone X can achieve the same width of the border around the screen.
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