With the popularity of capacitive screen mobile phones for many years, the focus of the mobile phone industry chain is no longer just on the front screen, but on the mobile phone frame, back, and even to provide users with a new way of space operation. Smartphones with only two-dimensional touch are becoming less and less common in flagship phones.

From the future development history of mobile phones, the dimension upgrading of two-dimensional touch mode has indeed continued. Apple has added 3D touch to the iPhone 6S. Although the feature has been completely eliminated in this year’s iPhone 11, it is still replaced by hapic touch, which has a similar practical touch. The purpose is to add z-axis touch sensing to the x-axis and y-axis touch direction of the original mobile phone screen.

In addition to the touch screen, the mobile phone industry chain will expand more ways of interaction

In fact, this technology has come up with an alternative scheme to save more space inside the fuselage. Different from the principle of force touch pressure module, ultrasonic technology can also detect the pressure and position when the finger touches the screen. At the same time, there is no need to increase the thickness of the screen excessively. Compared with force touch, it has a more cost advantage.

In fact, the fingerprint recognition under the screen using ultrasonic technology can also be regarded as the expansion of two-dimensional touch mode. In January 2018, vivo released the world’s first screen fingerprint identification mobile phone vivo x20plus screen fingerprint version. In the current Android mobile phone field, screen fingerprint identification has become a standard feature of high-end mobile phones.

On the other hand, mobile phone manufacturers are increasing the touch dimension of mobile phones by adding a screen on the back of the body. For example, Nubia X and vivo nex dual screen products, in addition to the traditional touch operation, the back screen can also be set as the corresponding virtual key in the game, so as to realize the multi-dimensional touch of players in the game process, which is no longer limited to the original two-dimensional touch on the front screen.

The first way is to bend the screen further to the frame of the phone. This kind of design first appeared on Samsung Galaxy note edge, which was released in September 2014. This mobile phone is equipped with one more screen on the right side of the fuselage, on which unread information can be prompted. The following year, Samsung upgraded the design to provide two side screens on the galaxy S6 edge.

The design of curved screen has continued to this day. At the same time, some manufacturers have developed targeted curved screen gestures. Therefore, the 88 degree hypersurface screen can be used on Huawei mate 30 pro to make the dream of the volume key disappear come true. Users can double-click the edge of the screen and slide up and down to adjust the volume.

On the other hand, even without curved screens, manufacturers have begun to use ultrasonic technology to add edge touch functions to mobile phones. Located in the mobile game player market, the Rog mobile phone adds ultrasonic sensors to the edge of the mobile phone, which brings the edge touch function to the mobile phone. In this way, users can control the L1 / L2 and R1 / r2 keys in the game process, changing from two controls to four finger controls, At the same time, it is more accurate than the touch operation on the back screen of the fuselage mentioned above.

In addition to the virtual key touch on both sides of the fuselage, the current ultrasonic technology can actually touch all the positions on both sides of the fuselage and the back of the fuselage. Even not limited to the current user protection habits for mobile phones, for example, Xiantong technology, which provides edge touch technology for Rog mobile phones, says that the company’s ultrasonic technology can recognize the operation even when the user wears gloves and the mobile phone uses a protective case. In fact, there is still a lot of room for edge touch technology to extend, such as replacing the physical shutter key when taking pictures to help determine whether the user holds the hand of the mobile phone, so as to intelligently adjust the key position.

In addition, mobile phone manufacturers have begun to explore technologies that can be manipulated without touching the body. Users can use pen and radar sensor to realize remote control or gesture control, and control mobile phone in a new way. Samsung Galaxy note 10, which was just released in August 2019, can realize the space isolation gesture control function through s pen. Users only need to press the button on s pen to make the corresponding action in front of the mobile phone, and the mobile phone can call out the corresponding application, so as to realize the interaction with the mobile phone through space isolation operation.

Subsequently, Huawei mate 30 series models released in September also added AI space isolation control function. Users can slide up and down, screen capture and other operations without touching the mobile phone, so that users can control the mobile phone when it is inconvenient to touch the mobile phone. For example, when cooking, they can look over the menu on the mobile phone while cooking.

Coincidentally, the pixel 4 mobile phone released by Google at the made by Google conference last week also added soli radar sensor. Its recognition ability has been upgraded from the previous infrared to millimeter wave signal, so as to realize sub millimeter precision motion tracking and realize the function of space isolation operation. Similarly, it can slide the screen, switch songs and browse photos without touching the mobile phone.


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