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 also extends to the frame and back of the mobile phone, and even provides users with new ways of operating in the air. Smartphones with only 2D touch are becoming less common among flagship phones.

2D touch becomes insufficient

When Jobs released the iPhone in 2007, the characteristics of the capacitive screen brought a new multi-touch operation method to the mobile phone screen. At the same time, the vast majority of buttons on mobile phones were eliminated, and the traditional nine-square grid button layout began to gradually decrease in the mobile phone market, and only survived in feature phones. In fact, there are rumors that Jobs thought the ideal design would be to remove all buttons from the phone. It was only for technical reasons at the time that the Home, Wake and Volume buttons were retained. And this requires further upgrade of mobile phone touch technology, which involves the upgrade of mobile phone frame and back technology, in order to make two-dimensional touch more multi-dimensional.

Not only the touch screen, the mobile phone industry chain expands more interactive methods

Judging from the development history of mobile phones in the future, the dimensional upgrade of the two-dimensional touch method has indeed continued. Apple added the 3D Touch function to the iPhone 6s, and although the function was completely canceled in this year’s iPhone 11 models, it was still replaced with Hapic Touch, which has a similar feel to the actual operation. The purpose is to add touch sensing of the Z-axis to the touch directions of the X-axis and Y-axis of the original mobile phone screen. In fact, this technology has now appeared an alternative solution that saves the internal space of the fuselage. Different from the principle of the Force Touch pressure module, the ultrasonic technology can also detect the pressure and position of the finger when touching the screen, and also There is no need to increase the thickness of the screen excessively, and it is also more cost-effective than Force Touch.

In fact, the under-screen fingerprint recognition using ultrasonic technology can also be regarded as an expansion of the two-dimensional touch method. In January 2018, vivo released the vivo X20Plus screen fingerprint version of the world’s first under-screen fingerprint recognition mobile phone. In the current Android mobile phone field, under-screen fingerprint recognition has become a standard feature of mid-to-high-end mobile phones.

On the other hand, mobile phone manufacturers are also increasing the touch dimension of mobile phones by adding screens on the back of the fuselage. For example, Nubia X and vivo NEX dual-screen version, in addition to the traditional touch operation, the screen on the back can also be set as the corresponding virtual button in the game, so as to realize the multi-dimensional touch of the player during the game. , no longer limited to 2D touch on the original front screen.

The edge of the fuselage that is constantly being explored

The edge of the mobile phone body has also become a testing ground for manufacturers to continuously explore more dimensional control methods.

Not only the touch screen, the mobile phone industry chain expands more interactive methods

The first way is to further bend the mobile phone screen to the frame of the fuselage. Such a design first appeared on the Samsung Galaxy Note Edge, which was released in September 2014 and is equipped with an extra screen on the right side of the fuselage, where unread messages can be prompted on the side screen. The following year, Samsung updated the design, giving the phone two side screens on the Galaxy S6 Edge.

The design of the curved screen has continued to this day. At the same time, some manufacturers have also developed targeted curved screen gestures. Therefore, the dream of using an 88-degree super-curved screen to make the volume buttons disappear on the Huawei Mate 30 Pro has come true. Double-tap the edge of the screen and swipe up and down to adjust the volume.

On the other hand, even if curved screens are not used, manufacturers have begun to use ultrasonic technology to add edge touch functions to mobile phones. The ROG mobile phone, which is positioned in the mobile game player market, adds ultrasonic sensors to the edge of the mobile phone, thereby bringing the edge touch function to the mobile phone, which also brings similar L1/L2, R1/L1/L2, R1/ The control method of the R2 key has changed from the previous two control to the four-finger control, and 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 buttons on both sides of the fuselage, the current ultrasonic technology can actually touch all positions on both sides of the fuselage and the back of the fuselage. It is not even limited by the current user’s protective habits for mobile phones. For example, Xiantong Technology, which provides edge touch technology for ROG mobile phones, said that the company’s ultrasonic technology can work even when the user wears gloves and the mobile phone uses a protective case. Operation identification. In fact, there is still a lot of room for extension of edge touch technology, such as replacing the physical shutter button when taking pictures, helping to determine the user’s hand holding the phone, so as to intelligently adjust the button position.

Remote control becomes a new craze

In addition, mobile phone manufacturers have also begun to explore technologies that can be controlled without touching the body of the fuselage. Users can use a pen, radar sensor to achieve remote control or gesture control, in a new way to control the phone.

The Samsung Galaxy Note 10, which was just released in August 2019, can realize the gesture control function through the S Pen. The user only needs to press the button on the S Pen to make the corresponding action in front of the mobile phone, and the mobile phone can call out the corresponding application. Realize the interaction with the mobile phone through the remote operation.

The Huawei Mate 30 series models released in September also added the AI ​​space control function. Users can swipe up and down and take screenshots without touching the phone, so that users can use their hands when it is inconvenient to touch the phone. , and can also control the mobile phone. For example, when cooking, you can browse the recipes on the mobile phone while cooking the ingredients.

Coincidentally, the Soli radar sensor was also added to the Pixel 4 mobile phone released by Google at the Made by Google conference last week, and the recognition capability has been upgraded from the previous infrared to millimeter-wave signals, so as to achieve sub-millimeter precision motion tracking and realize remote operation. You can also perform operations such as sliding the screen, switching songs, and flipping photos without touching the phone.

Wei Deling / Text

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