The high screen-to-body ratio does not mean the full screen. What should the real full screen look like?

Since the beginning of this year, full screens have blossomed everywhere in the mobile phone market, and the screen-to-body ratio has become a parameter that many manufacturers continue to emphasize when promoting new products. Undoubtedly, the gradual popularity of full screens has greatly increased the screen-to-body ratio of smart terminals. In the past decade, the screen-to-body ratio of smart phones has grown from more than 50% before to 90% today. The improvement of the viewing area of the screen has obvious advantages, especially for users who like to watch videos and play games, it is more visually impactful. However, the quality of a mobile phone screen is not determined solely by the single parameter of screen-to-body ratio, it also includes material, brightness, contrast, and color gamut. Therefore, consumers should not easily fall into the so-called "ultra-high" screen-to-body ratio.

In the future, more and more manufacturers will adopt OLED screens and a variety of fingerprint solutions + camera launches, and even use the innovation of new technologies to further enhance the screens of mobile terminals.

Increased screen-to-body ratio High screen-to-body ratio is not equal to full screen

Last year, the full screen "turned out", so that many manufacturers have gotten together on this technology. What follows is that this year's full screen has become the standard for many new brands around the world, whether it is a high-end flagship machine or a mid-range model with a price range of around 2,000 to 3,000 yuan, it is equipped with a full screen. With the popularization of full screens, the term "screen-to-body ratio" has become the most popular keyword among manufacturers. However, in the past decade, the proportion of smartphone screens has grown from 52% in the past to 93.8% this year. In the second half of the year, major brands have already geared up, and there will be more new machines with high screen-to-body ratio on the market in September.

The calculation method of screen-to-body ratio does not have a unified standard in the industry. Generally speaking, screen-to-body ratio = displayable area (length x width)/physical screen area. Under the same size mobile phone screen, the higher the screen-to-body ratio, the larger the display area. For players who like mobile games and watching videos, mobile phones with a high screen-to-body ratio are indeed more comfortable when playing games and watching videos.

According to the latest survey data from CINNO Research, in the first half of 2018, the global shipment of full-screen panels for smartphones was 435 million, an increase of 118.6% month-on-month. Among them, the Notch full-screen (including the U-shaped groove commonly known as Qi Liuhai and the beauty tip) (V-groove) mobile phone panel shipments are 117 million. Compared with the second half of 2017, Notch's full-screen shipments have exploded.

Among them, the rapid growth of Notch's full screen in the first half of 2018 was mainly related to the overall promotion of brands such as Apple, Huawei, OPPO, vivo, and Xiaomi. The most intuitive advantage brought by the Notch full screen is that it achieves a higher screen-to-body ratio than the traditional 18:9 full screen.

However, the high screen-to-body ratio is not equal to the full screen. At present, the mainstream full screens on the market have "bangs" and "chins." A senior mobile phone person told reporters from all media that from a technical point of view, 100% full screen has not yet been realized. Compared with the “bangs” and “chins” on the top and bottom of the screen, the borders on the left and right sides are easier to “become” narrower. . Therefore, many manufacturers will try to narrow the left and right borders as much as possible, but this does not seem to satisfy the user's pursuit of a full screen. In fact, at the upper and lower ends of the frame, for example, "bangs" contain a front camera, many sensing devices, especially full-screen models that support face recognition solutions. The design of the front bangs or "beauty tip" is impossible avoid.

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Look at the mobile phone screen ratio

It also depends on the screen's comprehensive "ability"

Is screen-to-body ratio important? The answer is yes. However, the screen-to-body ratio is not the only standard, because the quality of mobile phone screens is comprehensive. It includes a variety of index data, including material, brightness, resolution, color gamut, PenTile arrangement, etc.

In the era of full screens, more and more high-end models have begun to adopt OLED screens. Currently, smart phone screens use LCD or AMOLED. As we all know, in contrast, OLED has many advantages: it does not have a backlight layer, making the screen thinner and lighter. At the same time, due to its self-luminous characteristics, it is conducive to the endurance of mobile terminals, and it can also support the use of fingerprints under the screen. In terms of color performance, the contrast is high, the color gamut is wide, and the picture level is more layered. At present, in addition to Apple and Samsung, the high-end full-screen machines of domestic brands such as vivo, OPPO, Nuts, Huawei, Xiaomi, and OnePlus are equipped with OLED screens.

Industry technicians pointed out that users also need to pay attention to the maximum brightness of the mobile phone screen. Since everyone uses mobile phones outdoors many times, under the condition of sufficient sunlight, if the mobile phone screen is not clearly visible in direct sunlight, it will cause a poor user experience. Then in a strong light environment, the brightness of the mobile phone display has an important impact . For example, the Samsung S9's OLED screen has the highest brightness of 1130nits, which is four times that of an ordinary LCD screen, which means that the screen is still clear and readable in relatively sufficient sunlight. Most of the models that also use OLED screens have a brightness of about 600 nits, some 500 nits, and some nearly 300 nits.

An offline mobile phone store said that instead of just looking at the screen parameters given by the manufacturer and choosing the model, it is best to experience it yourself. The so-called "you get what you pay for", the cost of the smartphone screen itself accounts for a large proportion of the cost of the whole machine. Although everyone now emphasizes the use of OLED screens, the display effects of OLED screens of different price models are also different. difference.

In an interview with reporters from all media, Sun Yanbiao, Dean of the First Mobile Phone Industry Research Institute, said that after all high-tech functions on smartphones are realized, a full screen and a high screen-to-body ratio are the core. Because only when functional technologies such as face recognition technology and under-screen fingerprints are implemented can terminal products have a high screen-to-body ratio. He admitted that the current industry problem is the lack of functional innovation.

Future: Under-screen fingerprint + "punch" technology will further increase the screen-to-body ratio

Although the current technology has not yet achieved a true full screen, both the complete machine manufacturer and the upstream panel manufacturer use different solutions or technologies to provide screen-to-body ratios.

The reporter found that many complete machine manufacturers currently use the scheme of placing fingerprint recognition on the back of the fuselage. On the one hand, it can continue to support fingerprint recognition, on the other hand, the "chin" of the screen is as narrow as possible. This solution not only can quickly shrink the "chin", but also takes into account both safety and cost performance. For mid-range models with a price of around 2,000 yuan, it is more reasonable to use fingerprint recognition.

However, entering this year, some manufacturers began to try under-screen fingerprint solutions on high-end models. It is reported that Meizu's new 16th series uses under-screen fingerprint technology, and manufacturer data shows that its screen-to-body ratio reaches 90.97%, and the screen-to-body ratio of 16th Plus is as high as 91.18%. Among domestic manufacturers, the first to adopt the under-screen fingerprint solution is the vivo X21. Subsequently, the flagship NEX series of the same door even uses the under-screen fingerprint + lift front camera solution to increase the screen-to-body ratio of more than 90%.

According to the latest industry news, the U.S. Patent Office has approved an under-screen fingerprint recognition solution for Apple's latest application, which means that there will be a chance to see it in Apple products in the near future. According to reports, this patented technology recognizes fingerprints through overlapping sensors, dielectric sensors with light sources, and a micro-hole camera under the screen.

As the upstream, panel manufacturers are also striving to make breakthroughs. Regarding the future development of the full screen, according to the prediction of CINNO data research, the Notch full screen will continue to evolve, from "qi bangs" to a U-shaped groove or a beauty tip with a smaller opening. From the perspective of mobile phone brand planning, a more extreme perforated screen (opening inner diameter 3.xmm) will be launched in the second half of the year. Earlier, Samsung announced a patent application for a "hole digging" screen, which attracted great attention from the industry. The patent schematic published on the Internet shows that the "Qi Liuhai" on this screen has completely disappeared, and the sensor is directly opened on the display panel. Of course, if this technology is truly mass-produced, black holes with openings will still appear on the screen. However, its viewing area has also increased a lot compared to the current one.

A senior mobile phone person in the industry said that although the curved screen is not as high as a straight screen in terms of data, its curved surface can achieve the effect of visual extension. However, the problem with the curved screen is that the interaction of the sidebar is not great, and some do not even have any functions.

In addition, Sun Yanbiao revealed that the under-screen fingerprint technology currently compatible with full screens is mainly used on smartphones with OLED screens. According to relevant industry news, the under-screen fingerprint + LCD screen solution is already in progress. From the end of this year to next year, under-screen fingerprint technology is expected to be popular in the mid-range market. In other words, in the future, full screens with a high screen-to-body ratio can appear on lower-priced phones.