Let the front digging disappear completely, Xiaomi's third-generation screen camera technology experience

From last year to now, under the impetus of panel suppliers and mobile phone manufacturers, under-screen camera solutions have gradually, among which some have reached mass production and application level. Under-screen technology has become the direction of the development of smart phones at this stage. After all, in order to achieve a truly comprehensive screen experience for users, it does not cut the panel, does not sacrifice the original space, and achieves a whole screen on the front while retaining the front camera. The design of the mobile phone is the final form to be realized in the future development of mobile phones.

The mobile phone industry has been chasing full screens for a long time. Whether it is narrowing the bezel, retro mechanical structure, or even front and rear dual screens, behind every idea, we can also see what manufacturers have about the form of mobile phones. Understanding and thinking. But everyone knows that only by letting the camera “cross” the screen in a true sense and realizing the coexistence of the full screen and the front lens can it be considered the most perfect solution.

The road to the development of full-screen smartphones

Just a few months after the launch of the iPhone X, the aesthetics of the flagship phones of several major Android brands began to collectively imitate. Qi Qi joined the Liu Haiping camp and then reduced the bangs to a water drop screen. However, the beauty and ugliness caused by Liu Haiping is really unacceptable to many people.

After the bangs, domestic mobile phone brands are also working on the development of full screens, introducing the physical structure of the lifting camera, and some have also tried many retro designs such as sliding covers and flip cameras. However, these radical changes, because the screen display effect is not enough to fill the shortcomings caused by the structure, after all, they did not survive much.

Finally, with the maturity of technology and the emergence of hole-drilling screens, several manufacturers have returned to the same front. Although the hole digging still does not solve the integrity problem of the screen, from the comprehensive point of view of the design structure and user experience, the hole digging is indeed the safest design that is the closest to the full screen experience at this stage, and it is enough for most manufacturers to smoothly transition to the new stage.

How to realize the under-screen camera technology

In order for users to have a better overall screen experience, even if the under-screen camera only brings a small change in the appearance of the screen, for the current competitive mobile phone manufacturers, technological innovation is still the most direct way to win word of mouth and attract users. Effective way. Since OV last year, Xiaomi and other manufacturers have successively released related under-screen camera solutions, opening up the competition of under-screen camera technology. On August 28 this year, Xiaomi launched a new “Xiaomi third-generation under-screen camera technology”, which further improved the consistency of display effects.

In fact, it is not difficult to put the camera on the inner layer of the screen. The “screen fingerprint” solution used by many Android phones now is to place a miniature camera under a small fingerprint recognition area, and cooperate with the light reflection generated by the OLED screen to realize the fingerprint entry, recognition and unlocking process.

However, due to the problem of light transmission, only black and white photos can be captured by the screen fingerprint, which can only meet the requirements of fingerprint recognition, and is far from the image quality requirements of the camera.

Similarly, the basic principle of the under-screen camera technology is also very simple. When the camera needs to be used, the screen of the corresponding area can be made transparent, and the screen can be displayed normally in daily use, so that the screen display and the front camera function can be taken into account at the same time to ensure the integrity of the screen. Sex. However, the physical display layer itself cannot transmit light. How to keep the front camera’s Selfie and face recognition functions unaffected while ensuring the original look and feel of the screen has become the biggest problem in solving the under-screen camera.

Judging from the existing under-screen camera solution, the screen is actually divided into two parts, one part still continues the original structure design, and the other part that needs to “expose” the camera uses a transparent conductive layer and lowers the display The pixel density ensures the light transmittance so that the camera hidden under the screen can operate normally, which is the technology used by the previous generation of Xiaomi under-screen cameras.

However, this structure will bring a new problem-that is, a negative impact on the look and feel of the screen. From last year’s Xiaomi 9 mobile phone, we can see that as long as you tilt the screen angle slightly, you can see a small “discoloration” area on the top of the phone, like a spliced color block. This is actually a compromise for the screen’s light transmittance and lower pixel density.

To obtain a more uniform display effect, it is necessary to eliminate the display difference between the two screens as much as possible. “Xiaomi’s third-generation under-screen camera technology” was also born. This technology is improved on the basis of the previous generation. The pixel density of the screen above the camera is increased to make it consistent with the main screen. In terms of effect, the difference is reduced as much as possible; in terms of light transmittance, the new third-generation under-screen camera technology changes the material to make the space between pixels transparent, ensuring the amount of light entering, so as to meet the needs of the front camera.

By comparing with the Mi 10 Extreme Commemorative Edition, it can also be seen that although there are some differences in the display effect in the part of the camera, it is much better than the previous solution to reduce the pixel density.

In normal use of the screen, it is actually difficult to notice the difference between the two parts of the screen. When you open a colorful high-definition picture, you will not feel a clear distinction even when viewed from the side. When using the front lens to take pictures, it can be displayed normally, but it may be a little insufficient in terms of color performance due to light problems. However, the algorithm of the entire front lens can be re-tuned and optimized in the later stage, and the color effect of the Selfie photos will be further improved.

to sum up

At present, a flagship product launched by a mainstream manufacturer on the market has achieved a high level of screen, camera, performance and other aspects. The launch of Xiaomi’s new under-screen camera technology and the possibility of mass production have allowed users to have a more complete and comprehensive screen experience. After all, more users still hope that their mobile phone is a cooler product.

I believe that everyone still remembers Lei’s keynote speech for the 10th anniversary of Xiaomi this month. With the release of Xiaomi Mi 10 Extreme Edition and Redmi K30 Extreme Edition, “technology-oriented, cost-effective, and the coolest product” , Has become a new development trend of Xiaomi products.

There is always a key factor in the development of Xiaomi’s enterprise, which is the constructive engineer culture within Xiaomi. The Xiaomi Mi 10 Extreme Commemorative Edition released earlier is a concentrated expression of Xiaomi’s technical genes and proves that Xiaomi has once again succeeded in the high-end market. And behind the release of “Xiaomi’s third-generation off-screen camera technology”, behind this is Xiaomi’s continuous investment and pursuit of technology research and development, and it is also Xiaomi’s attitude towards hard core technology in the next ten years.