Recently, a number of media said that Apple's next-generation mobile phone will use the PFF structure capacitive screen that the industry believes to be "bad" to slag, and vowed that Apple will use the plastic touch screen to open a new era of "flexible touch"! In addition, the collapsible mobile phones and tablets that were previously speculated by the parties will "subvert" the entire universe. For a time, this "flexible touch", which was previously considered to be an industry investment mistake "dead ghost", seems to have the "Yellow Robe Plus" Wang Ba gas.
The concept of "flexible touch" may be that since the touch and display hooks together, many industry vocabularies have the same prefix on both of them. In fact, the hardware that realizes these two functions is almost the same technical principle and process flow to organize production, so there is a flexible display, there must be "flexible touch"!
From the beginning of the sale of flexible AMOLED display screens by Samsung in 2016, the flexible display has become the largest piece of tiger skin in the industry. Everyone wants to sit on this throne to show their "greatness"! However, this time there is not much sound in the touch field to indicate that it has such a "flexible touch" technology.
The reason is very simple. The earliest capacitive screen is the “flexible touch screen†of PFF structure. This flexible touch screen was promoted from the 1990s. In the past ten years, it has accumulated various kinds in the industry for various reasons. The negative user experience can be described as "notorious", and the low-end resistive touch screen can easily beat it.
After Apple applied capacitive touch screens to consumer electronics and popularized the entire consumer electronics market, the non-Apple camp had to use the resistive touch screen production technology to produce GFF structure touch screens. In order to ensure that users can get an experience similar to Apple products, the same tempered glass material is used for the operating surface that is in contact with the user.
In the early days of the non-Apple camp to promote capacitive screens, no one tried to use a PFF structure touch screen with better production efficiency and yield than the GFF structure touch screen, but the G glass cover user experience cultivated by the market, let the P plastic cover It has been unpredictable, and as the LCD display continues to thin, the strength of the LCD display is insufficient, and it needs to be able to be fully reinforced with the G-glass cover. The PFF structure touch screen is only a short-lived, and disappears in the industry.
So, what is the difference between the PFF structure touch screen? Is the user experience with the cover surface really unacceptable? Not always. In the mid-range and low-end tablet and tablet mobile phone market applications with the largest shipments, the PG structure capacitive screen has always been the mainstream, and the P plastic cover that everyone thinks is “bad†to the slag!
Not only that, but there are a lot of custom-made high-end children's flat panels, or military flat panels, and they are more willing to adopt PFF structural capacitive screens. These products require good anti-drop performance and better protect the functionality of the products. Secondly, more important The products are flat. At the same resolution, the display area of ​​the product is much larger than that of the mobile phone. Therefore, the PPI value is much lower. A slight scratch or stain will not affect the actual display. Of course, the use environment of these products is also a little farther than the visual distance of the mobile phone, and also reduces the appearance of the P plastic cover.
But in any case, even Samsung and LG have introduced a limited number of repeatable curved mobile phones with P plastic covers. Sharp and motorcycles have also introduced non-bendable P plastic cover phones. So far, the mobile phone industry and the terminal market have Still no chance to give P plastic cover.
From this point of view, the problem of the P plastic cover is not solved, and there is nothing in the flexible touch that really appears in the consumer electronics. But the flexible display is coming. If the problem of flexible touch is not solved, the whole industry is definitely not reconciled.
Up to now, the biggest problem with the P plastic cover is that it is not scratch resistant. In order to solve this problem, the industry used to use two methods to avoid the addition of hard film or enhanced self-healing layer.
The more popular mode in the industry is to add a hard film layer to the P plastic cover plate. After the molding, the highest hardness can be obtained, and the highest value can be close to 9H. However, the hard plastic layer of the P plastic cover is extremely brittle and cannot be bent. If it is slightly deformed, it will crack, and the actual meaning is not too great.
Similarly, LG and Motorcycle have previously adopted the P plastic cover composite PU self-healing layer on their mobile phones, which can repair slight scratches up to 0.02mm, which basically guarantees the surface quality under normal use. The problem is that it does not guarantee that scratches caused by contact or collision between the phone and other objects in daily life can be automatically repaired.
According to Fu Yin Xu, who has been engaged in the research of chemical basic raw materials for more than 20 years, the current direction of solving the application problems of flexible P plastic cover is mainly placed on PU repairable materials. Mr. Xu said that they have a long history of applying PU repairable materials in the automotive industry. They can even repair scratches above 1 MM in non-display areas. Therefore, the industry should solve the flexible display and touch of automotive electronics in the future. The time of opportunity should not be too long.
Mr. Xu believes that as long as flexible touch and flexible display can be realized in automotive electronics, they will not have many obstacles from car electronics to smart home. Only the market space of automotive electronics is less than one tenth of that of consumer electronics, and the market space of smart homes is much smaller than that of automotive electronics. It is expected that these two markets will erupt and drive the development of the entire industry. reality.
Other industry people have expressed the same view. Everyone thinks that the flexible touch that can be repeatedly bent, the functional materials are basically not many technical industry obstacles, because the display device based on complex semiconductor technology can realize the reflexible flexible display. So, just the touch screen of the conductor circuit process, it is much easier to achieve repeatable bending touch.
It is only the cover material of the operation surface protection, that is, it can realize reproducible bending, and it must have high surface hardness to prevent surface damage. How to deal with these two contradictory performance parameters is still the biggest problem in the industry. Basically, I have not heard of anyone in the industry who has made a real breakthrough.
So, what kind of touch screen is the "PFF structure capacitive screen" that will be adopted by Apple's next-generation mobile phone? Whose technology is it? If Apple really achieves "flexible touch" without any compromise, are other competitors in the consumer electronics industry ready?
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