The Era of the Under-Display Camera is Coming

Various mobile phone vendors began to release the under-display camera phone. We can say that from the second half of 2021, the smartphone officially entered the screen of the camera.

The Era of the Under-Display Camera is Coming
under-display camera phone

On July 27, ZTE released the AXON 30 screen version of the mobile phone, so that the under-display camera finally reached the level of most consumer expectations. On August 10, Xiaomi released Mix4, which is also a mobile phone equipped with a under-display camera. In the past few days, Samsung released the latest Galaxy Z fold3, and the same under-display camera. Obviously, it can be asserted, starting from this moment, or starting from the second half of 2021, the smartphone officially enters the under-display camera era.

Although it is claimed to be a under-display camera, the focus is on the screen, not a camera.

There are two main aspects of the under-display camera, one is how to make the outside light source through the screen, the photosensitive element (CMOS) receives threatening to process into digital signals, and if the light source is insufficient, it will result in an image blur. The second is if the light is to be translated through the screen, or the portion other than the OLED organic light-emitting material is transparent, or adjust the pixel layout in the screen, but in this way, the screen pixel of the camera is insufficient, so that Generate a screening window, causing a drop in view of the screen.

Of course, some people may be confused. The fingerprint technology under the screen is very mature, and the principle is similar, why is it so difficult to the camera?

The reason is that the under-display camera needs to record color information, and the fingerprint only needs to be able to identify the texture, and there is no requirement to the color, so the camera is much higher than the transmission rate. However, the light transmission rate and pixel density of the screen is like fish and bear's own, in the past few years, many manufacturers have launched their own under-display camera solutions, but because the screen resolution of the camera is too low, greatly There is no experience, there is no many manufacturers adopted.

Today, the under-display camera scheme is basically mature, and the manufacturer also has the right to look at the screen resolution and taking experience together to follow the small-compartment camera technology.


Samsung has released the latest folding screen for the latest folding screen in the near future, which is remarkable. This phone also uses a under-display camera technology.

However, on the screen resolution and photo experience, this mobile phone Samsung choice is obviously a photo experience, but from the display effect, it is really difficult. Whether it is from the official publicity, or from various media experience pictures, it can clearly see the position of the camera, the screen resolution has a significant decline, forming "screening", the resolution is only 200PPI. 

Galaxy z fold3 under-display camera area

Interestingly, the other high-end flagship Galaxy Zflip3, which is released in Samsung, does not use a under-display camera solution, but a tight screen. According to Samsung spokesperson, it is because Galaxy Z fold3 is equipped with a standard self-photographing head in the external display, and the under-display camera is better for the immersion experience when watching a video or playing games, so it is unable to provide excellent Selfie quality. Users can also use external self-photographing pictures to perform Selfie, while Galaxy Z Flip 3 needs to take into account the front photographing quality.

Obviously, Samsung also understands that the current first generation screen is still very immature. However, in accordance with the evolution of domestic related technologies, it is expected that the next generation of products will be able to achieve a relatively satisfactory effect.


Xiaomi's Mix4 is also a mobile phone with a under-display camera. Unlike Samsung, Xiaomi's screen takes into account the camera experience and screen display. As can be seen from the actual experience, almost hard to find the CUP screen (the under-display camera area screen) is different from the OLED screen in the usual use process.


Xiaomi's under-display camera area

Xiaomi used Huaxing Optoelectronics solution, and wanted to make a photographic and display effect, which made a smaller point of the pixel point of the CUP screen, and increased the brightness of the pixel, so that the resolution of this area also reached 400ppi.

However, under the screen, in addition to the pixel point, there is also a PCB board, circuit devices, etc., which requires all transparentization of these devices to increase light transmittance.

The smartest thing is to place the control circuit in the OLED screen, and extend the leads of each pixel in the CUP, and transparently transparent these leads, while ensuring the amount of light, there is a good display effect. .

Of course, if you want to do this, the cost is obviously not low. The CUP screen area only accounts for 0.2% of the entire screen, but the cost is almost comparable to the entire OLED screen. I want to come, this is why Xiaomi Mix4 is selling such a high reason.


ZTE is the first manufacturer of domestic and even the world officially released the screen of the camera, and ZTE Axon 30 is also a mobile phone that is the latest generation of the under-display camera technology.

ZTE under-display camera area

ZTE's screen program comes from Visino, its idea is roughly the same as Huaxing Photoelectric, which is shrinking the pixel size in the CUP area, and then cooperate with the transparent material circuit, which reaches higher light transmissions. This solution is very difficult to see. Differences, only the area of ​​the camera is only seen after tilting a certain angle.

And in order to better control the display of the CUP screen and the OLED screen, the core also adds a UDC Pro screen, enhances the control of the screen pixel, so that the two screens are more accurate, synchronized, and consistency better. On the circuit arrangement, multifunction ACE mode is used, which is more efficient, making two regions more natural.

Although I don't know how much the cost of the Visino program is only 2198 yuan, it is only 2198 yuan, and the cost difference between the chip and other devices is excluded. The cost difference between the chip and other devices is predicted. It is lower than Huaxing's photoelectric cost.


In addition to the above-mentioned number of mobile phones, many major plants are also published in the screening camera new machine, such as OPPO released a new generation of camera technology in the near future, according to the relevant people broke the news, OPPO screen The lower camera technology has already done almost the camera position, even if the large angle tilt can also ensure the integration of the area under the screen, the same resolution reaches 400ppi, but how the photo effect is unclear. There is a solution called OPPO to use Jingdong's solution and has not yet determined its authenticity.

In addition, there is also a problem that the latest product is also exploded. It will also carry the under-display camera scheme, but the specific performance is required, and it is necessary to know after the product is available, but it is very likely to use OPPO's under-display camera scheme.


Undoubtedly, the under-display camera program is now basically mature, the smartphone will officially enter the under-display camera era. From the above programs, Samsung is still in the first generation of the camera security period, with domestic manufacturers more than one year. Xiaomi's program takes into account the display and camera effect, and ZTE is taking into account the two, and the cost is also lower, from the cost-effective, the STEL's Si Xinnuo program is clearly the highest cost.