The screen size of mobile phones is now getting bigger and bigger, and the technology used on mobile screens is getting better and better. However, careful users can find that there is always a “black border†between the screen and the border of our mobile phone, and the white body of the mobile phone is particularly obvious, and it is really tangled. But what is this "black border"? What is the role of its existence? Let's give it to everyone.
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Black rim is ubiquitous
First, let's take a look at the digital products most commonly encountered in our daily lives - mobile phones. Mobile phones are the most familiar to everyone, and nowadays mobile phones have many colors for consumers to choose from, but the white and black colors are the most classic and the most popular among consumers. But many users who buy a white-color mobile phone will be so distressed. Why does the white body's screen look like a black border on the border, and the black body's "no"?
The black side of the white body is obvious
The black side of the black body seems to "disappear"
Many consumers have a misunderstanding here, that is, the white body mobile phone screen has black edges, while the black body mobile phone screen has no black edges, but in fact, no matter which color body, this phenomenon exists. of. The white body is white because it is in contrast to the black edge of the edge of the screen, so it looks very obvious. The black body is black because the body frame and the black side are formed. Consistent vision, which makes people mistakenly think that the black side is gone.
Another misunderstanding is that many people think that only mobile phones have this black-and-white display, while other digital products do not. This is wrong. To be corrected, all digital products with screens exist, there are black edges between the screen and the border, including mobile phones, computer monitors, televisions, etc., all of which exist on the black side. Then the question is coming. What exactly is this abominable black border?
Black side is the BM area
There is a famous saying that "existence is reasonable." Therefore, this annoying black side does not exist for no reason, and its existence must have its role. This black border is considered from the design level, and its scientific name is called BM area.
The primary role of the BM area is to prevent screen leakage. If there is no such BM area on a screen, a clear glow will be seen at the edge of the screen. Because each phone has a slight error in the screen when it is assembled, it is impossible to achieve absolute alignment. If the outer frame of the screen is aligned with the visible edge of the BM area, a colored glare will appear at the edge of the frame. The white-framed phone may reflect the screen light, and bright edges will appear around the screen. However, some mobile phone screens have obvious light leakage, which is caused by the large error in the assembly of the screen, and the BM area cannot be effectively blocked.
Another reason is the black edge caused by the problem of the spacing between the screen inside and outside the mobile phone. Many product screens not only have a black border on the screen frame, but also a narrow black frame in the black border. This is because the screen of the mobile phone is generally divided into two. Two layers, the innermost layer is the display layer, and the outer layer is the protective glass touch layer. There is still a certain distance between the inner display and the protective glass. It is normal to have dark shadows with the spacing.
Nowadays, the screens of many mobile phones have adopted the design of ultra-narrow bezel. Of course, this ultra-narrow bezel theoretically still needs to count the screen BM area. Therefore, when mobile phone manufacturers are promoting ultra-narrow bezel screens, they also see that the black side (BM area) of their mobile phone screens is getting narrower and narrower. Some manufacturers even put the black edges close to the border, which is also the effect. Improved performance of technical processes. In the near future, there will be a real black-free screen.
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