The off screen camera is far from the time to say “really fragrant”

Comprehensive screen can improve the maximum mobile phone screen and bring better visual experience to users. It has gradually become the standard configuration of smart phones. But the contradiction between it and the front camera is increasingly obvious. < p > < p > in Zhihu, someone asked: I don’t need to take selfie. Why don’t mobile phone manufacturers consider designing a mobile phone without a front lens? I just want a full screen. For this question, I just want to say: what do you do if someone calls for you on a video call? It is impossible to give up the front lens design on smart phones! < / P > < p > under the guidance of iPhone x, major manufacturers have designed various “bangs” according to their own understanding. So we have seen a variety of “shaped screen” designs in recent years. < / P > < p > these designs have only one purpose, leaving the front lens position on the full screen. Although used more will also be used to, but no matter what kind of special-shaped screen design, always give people the feeling of “regret”. In addition, in the last two years, there are too many types of “shaped screens” on Android. As a result, the third-party developers are actively adjusting the aspect ratio of direct application, directly removing the content display of the missing area at the top. < / P > < p > before the off screen camera technology matures, manufacturers have achieved “true and comprehensive screen” through the design of lift screen. But the price of this design is to make the mobile phone thicker and heavier because of the lifting motor and slide rail components. When 5g function is added to the mobile phone, 5g module plus heat dissipation module itself will occupy a lot of space of mobile phone. Plus, it’s getting bigger and bigger. Most of the 5g mobile phones released this year weigh more than 200g, and the thickness is more than 9mm. Such a mobile phone, if coupled with the lifting design, really want to run “half Jin machine”. < / P > < p > as a result, most of this year’s flagship aircraft have returned to the design of hole digging screens. Just to let users with small hands be able to hold the mobile phone! In this case, the time is ripe for the introduction of off screen camera technology. < / P > < p > let’s talk about the principle of taking photos by mobile phones: the principle of taking photos is the same. When the reflected light of the object passes through the camera lens and forms a reflection on the photosensitive element, the image will be saved and become a photo. < / P > < p > as long as enough light passes through the screen, it reaches the lens under the screen. We can hide the camera under the screen. However, the light transmittance of OLED screen is only 5%, which is far from meeting the requirements of photographing. How can we get more light through the screen? However, it must be noted that this kind of transparent screen technology is not really “full transparency”. If you look at the screen carefully, you will find that the background is gray, not transparent like glass. < / P > < p > the reason is that the screen is not as transparent as glass, but only half of the hair color pixels are made into “transparent pixels”. This means that only part of the panel area can pass through the light. The other part of color rendering pixels is responsible for image display. But that part of the light is enough to “fool” our eyes to see what’s behind the screen. < / P > < p > but this “transparency” comes at the cost of loss of display resolution. Due to the need to replace some chromophore pixels, the resolution of millet transparent TV can only reach 1080p level. < / P > < p > let’s talk about the technology of camera on and off the screen. First of all, the mobile phone screen does not need to be “transparent” in full screen. It’s not only meaningless, but it also reduces the resolution. Because the mobile phone screen is closer to the human eye, the requirement of display accuracy will be higher. We just need to make a “transparent” effect above the camera area below the screen. < / P > < p > according to the official data of the supply chain manufacturer vinosin, we should first use new organic and inorganic membrane materials with higher transparency in the camera area. Do the light transmittance so that the camera can capture enough light. In addition, the driver circuit and pixel structure should be redesigned to drive the display of this area independently to ensure the display of the camera area. < / P > < p > let’s talk about the display problem first, according to the demo videos released by the manufacturers. The display of the camera area under the screen is obviously different from the “main display area”. This obviously does not meet the standard of true full screen. The reason for this problem has been explained by Xiaomi. The rest of the way is to keep only four pixels per screen. But in this way, the difference in screen resolution is very obvious. < / P > < p > and the scheme of the third generation of under screen camera is to make the sub-pixel smaller, so as to ensure the resolution and transmittance. The display effect is much better than the previous two generations. < / P > < p > but is this area really indistinguishable to the naked eye? ZTE’s new mass production model axon 20 also uses three generations of off screen camera technology. I took a close look at: < / P > < p > the evaluation video on the Internet pointed out that the “camera area” is quite normal in displaying dark background. But if it shows a pure white background. Thick, it’s true! < / P > < p > therefore, the current “camera area” can not be senseless in daily use. If you are an obsessive-compulsive disorder, you can’t bear to face the “camera area” that will come out and disgust you from time to time. From this point of view, it is very similar to the design of the hole digging screen < p > < p > and then there is the self portrait effect. From the present point of view, the off-screen Technology Daily photography is no problem. However, in the high brightness and high contrast scenes, the highlight overflow is more obvious. < / P > < p > on the left is ZTE axon 20 self portrait sample, and on the right is iPhone 11 self portrait sample. The highlight of the left sample is obvious, and the outline of the clothes is not clear enough. The whole picture is badly smeared. The light input is obviously insufficient. Off screen camera imaging also needs the assistance of software algorithm, and in this regard, manufacturers may need several generations of product efforts to achieve the same level as ordinary front lens. < / P > < p > at present, the off screen camera scheme is far from mature. Both the display effect and the photo effect are not satisfactory. Therefore, I suggest you: this first few generations of off screen camera products, only for you to taste fresh. If you want to use it as a daily main engine, you have to wait for the technology to mature. However, in the long run, the off screen camera technology can not only solve the visual defect brought by Liu Haiping screen, but also solve the problem of heavy body caused by lifting camera. It’s the ultimate form of the true full screen. After several generations of changes, the off screen camera has finally entered the stage of mass production and commercial use. In the next year or two. We will see more and more off screen camera models coming out. And I’m very optimistic about the development of this technology. Just like the screen fingerprint technology of the year. < / P > < p > the first screen fingerprint mobile phone vivo X20 plus was released in 2018, and the experience of the first generation of screen fingerprint was also very poor. For example, the problem of low sensitivity and slow speed has been criticized by many people. But then the screen fingerprint technology entered a rapid iteration. Just a year later, it has developed to the sixth generation, and its use experience has gradually improved. Now the screen fingerprint is the standard configuration of most high-end mobile phones. Its development to popularization has only experienced a short period of more than a year. < / P > < p > I think this kind of fast iteration will also happen in off screen camera technology. After all, manufacturers are trying their best to pursue product differentiation, and the technology of off screen camera is also a breakthrough in the iteration of mobile phone product update. Continue ReadingStraight screen S20! Samsung Galaxy S20 Fe exposure: 1Hz high brush + snapdragon 865