Question 2: Why is there a black border on the screen of the mobile phone? There is a famous saying that "existence is reasonable". So this nasty black border doesn't exist for no reason. Its existence must have its function. This black border is considered from the design level, and its scientific name is BM area.
The primary function of BM area is to prevent the screen from leaking light. If there is no BM area on a screen, you will see obvious halo at the edge of the screen. Because there are some errors in the assembly of the screen of each mobile phone, it is impossible to achieve absolute alignment. If the screen frame is aligned with the visible edge of BM area, color glare will appear at the edge of the frame, and the mobile phone with white frame may reflect the screen light, and bright edges will appear around the screen. At present, some mobile phone screens have obvious light leakage, which is caused by the large assembly error of the screen and the inability to effectively block the BM area.
Question 3: Why is there a black border on the screen of the mobile phone? This black border is considered from the design level. Its scientific name is BM area.
The primary function of BM area is to prevent the screen from leaking light. If there is no BM area on a screen, you will see obvious halo at the edge of the screen. Because there are some errors in the assembly of the screen of each mobile phone, it is impossible to achieve absolute alignment. If the screen frame is aligned with the visible edge of BM area, color glare will appear at the edge of the frame, and the mobile phone with white frame may reflect the screen light, and bright edges will appear around the screen. At present, some mobile phone screens have obvious light leakage, which is caused by the large assembly error of the screen and the inability to effectively block the BM area.
Another reason is the black edge caused by the distance between the internal and external screens of the mobile phone. Many product screens not only have black borders, but also have narrow black borders inside. This is because the mobile phone screen is generally divided into two layers, the innermost layer is the display layer and the outermost layer is the protective glass touch layer. There is still a certain distance between the inner display screen and the protective glass. With the distance, dark shadows will naturally appear, which is also normal.
Nowadays, many mobile phone screens are designed with ultra-narrow borders. Of course, this ultra-narrow border should theoretically be counted in the BM area of the screen. Therefore, when the current mobile phone manufacturers promote the ultra-narrow bezel screen, they also see that the black edge (BM area) of their mobile phone screens is getting narrower and narrower, and some manufacturers even make the black edge close to the bezel, which is also a manifestation of technological progress. In the near future, there may be a real screen without black edges.
Question 4: Why are there black edges on all four sides of the big-screen mobile phone screen? This is generally the case, to prevent the long side from leaking light and affecting the visual effect.
Question 5: Why does the mobile phone screen always have black edges? There should be something wrong with your LCD. My friend used to have a flat panel display, but later she wanted to change it to a liquid crystal display.
Question 6: Why do the screens of high-end mobile phones have black edges now? This black edge is called BM area, and all LCD screens have this black edge. If there is no BM area, you will see a halo at the edge of the screen. If the outer frame of the display is aligned with the visible edge of the BM area, colored glare or bright edges will appear at the edge of the frame (white edges will reflect the screen light).
Question 7: Why is there a black border on my mobile phone screen? It didn't exist before. That's right. The display screen is a built-in LCD screen. The glass outside is a touch screen. The two are different.
mobile phone screen
Mm-hmm. That's right. The display screen is a built-in LCD screen. The glass outside is a touch screen. The two are different.
Question 8: Why do all mobile phone screens with white panels have black edges? Everyone is familiar with the mobile phone screen. You can find that not only the mobile phone screen, but also other screens are black. If the screen is black for power saving, do you think the black mobile phone wallpaper is more power saving than the white one? Now, let me answer these questions for you. Why are all kinds of screens black? The principle of the display is to display different colors by superimposing the three primary colors of red, green and blue. When it is fully illuminated, it shows white. Because there is no substance that emits black light after being electrified, that is, a substance that absorbs light, the white display may only display white. If you don't change the color of the screen through hardware, then if you want to make the screen display white, you can only keep the screen powered on all the time, so the power consumption of the screen is amazing. How to consider it, white screen is unrealistic. Is black mobile phone wallpaper more energy-efficient than white? Is black mobile phone wallpaper more energy-efficient than white? This is not necessarily because different mobile phone screens have different panels, which are divided into LCD screens and OLED screens. For LCD screens (such as our common TFT and IPS screens), there is almost no difference in power consumption between black wallpaper and white wallpaper, because the LCD screen itself cannot emit light, and its power consumption is almost entirely from the backlight module except for the driving circuit and touch circuit of the LCD screen. If expressed by a formula, the luminous efficiency of the LCD screen when displaying all white is directly proportional to the product of backlight conversion efficiency and pixel aperture ratio. To put it simply, the ordinary LCD screen itself does not emit light, and white light is emitted from the lamp tube at the back, penetrating the screen and shining on our eyes, so we can see the image. When the black screen is displayed, although the LCD screen is completely black, the light on the back will still shine, so we will see white spots on the edge. This makes it easier for everyone to understand. Since the backlights are all on, there is naturally no problem that wallpaper of any color consumes too much electricity. For organic light-emitting diode screens (such as AMOLED series screens), using black wallpaper will indeed save some electricity than using white wallpaper, because each pixel of the organic light-emitting diode screen emits light independently. In a sense, the power consumption of the organic light-emitting diode screen is proportional to the actual light intensity emitted by the screen, or the power consumption of the organic light-emitting diode screen is proportional to the sum of the respective brightness of each pixel, that is, how much electricity is used for display. When most pixels are turned off or display dark colors, organic light emitting diodes will be much more efficient than LCD. When the display is completely black, all pixels of the OLED screen do not emit light, and the effect is similar to the off-screen state, so the black screen display effect of the OLED screen is better than that of the LCD screen, and the power consumption is also lower. If only one pixel on the whole screen needs to emit light, the backlight must still work at full capacity for the lcd screen. On the OLED screen, as long as one pixel is lit, all other pixels can be turned off, so black wallpaper will save more electricity than white wallpaper. Postscript: For more mobile phone questions and answers, please leave a message in the discussion area below, and I will give you an answer as soon as possible.
Question 9: Why is there a black border on the edge of the iPhone screen? What's the use of this black border? It's called BM area. The main function is to prevent the display screen from leaking light. If there is no BM area on the display screen or there is not enough BM area, you will see obvious halo. This nasty black border exists for no reason. This black border is a design problem, and its scientific name is BM area. The main function of BM area is to prevent the display screen from leaking light. If the display screen is not as large as BM area or BM area is not enough, you will see obvious halo. Because even the same model of mobile phones, each mobile phone will have subtle errors when assembling, and it is impossible to achieve complete alignment. If the screen frame is aligned with the visible edge of BM area, a colored light will appear at the edge of the frame, which is more likely to cause light leakage. Another reason is that the space between the inner and outer screens of the mobile phone creates another kind of black edge, because the display design is generally divided into two layers, and there is a certain distance between the inner display and the protective glass. The distance will naturally produce shadows.
Question 10: Why does Huawei's mobile phone screen have such a unique black border? This is his style.