We pointed at the front of the phone, but I do not know the back of these games

Most functions of people using the mobile phone are completed on the screen, and between a point and a stroke, they enter into a boring network world. In fact, there are many fun games on the back of the phone. In addition to the well-known camera used on the back of the phone to take pictures, use the flash to follow the night road, use the fingerprint to unlock, and customize a variety of interesting patterns or signatures, what are the different games? Here we may wish to come together.

Second screen (representing model: YOTAPHONE)

Today's smart phones are full of tricks in terms of functionality and appearance. Among them, YOTAPHONE has just come out to be an eye-catching model. YOTAPHONE is designed and manufactured by the Russian smartphone maker Yota Devices. The second generation of the product is currently on sale. Compared with other mobile phones currently on the market, the biggest feature of YOTAPHONE is that it has a 1EPD electronic ink screen on the back of the fuselage. The aircraft was given to the Chinese national leader by the President of Russia as a national gift in 2014.

The machine has a sleek, sleek look and uses a dual-screen design. The front is a 5.0-inch Super AMOLED screen and covers the third generation of Corning Gorilla Glass. The secondary screen uses a 16-step grayscale EPD e-ink screen. The screen size is slightly smaller than the front 5 inches, which is 4.7 inches. This is to allow plenty of room for the back camera. Although its resolution is only 960x540, but the PPI is 235, the finest degree of display is slightly higher than the 6.0-inch first generation Kindle Papaerwhite, plus the matte texture, feel can simulate the real paper book effect. Of course, due to the nature of the electronic ink screen, this sub-screen can only display black and white gray images.

How EPD works

The working principle of EPD is that the electronic ink screen has a lot of tiny “microcapsules” attached to the surface of the electronic ink screen. It encapsulates negatively charged black particles and positively charged white particles. By changing the charge, different colors of particles are arranged in an orderly manner. Black and white visualization. Therefore, the electronic ink screen is extremely power-efficient, and the electronic ink screen consumes power only when the page is refreshed, does not consume power when the display is stationary, and can extend the life time of the device. It is simply a gospel for users who love to read e-books. In addition, EPD has the advantage of reading under bright light, bending, etc., but the disadvantage is also very obvious, that is, the refresh rate is very low. But purely for reading, e-ink screens are clearly better than LCD or OLED screens.

Touch back (on behalf of models: OPPO N1)

Although OPPO N1's main highlight is the rotatable camera, but its back touch is also a major highlight of innovation. The aircraft's back touch panel was designed on the surface of the back shell and under the camera. Have a special sensor area, support for sliding, double click, long press these three operations, can be used to change music, browse the web, open a specific program, etc., and joined the touch panel does not affect the appearance of the fuselage.

According to OPPO, this design allows the user's thumb and index finger to work together to avoid excessive fatigue on the thumb and is also more conducive to one-handed operation of large-screen mobile phones. At the same time, the addition of the back local touch function is more conducive to the user's use of the machine's rotating camera for self-timer operation, such operations have great advantages compared to the traditional physical button operation or touch screen operation. Of course, if the user doesn't like this feature, he can also turn it off at will.

NFC (data exchange, mobile payment, etc.)

Speaking of NFC, although many mobile phones can see this function while pulling down the shortcut switch, there may not be many people who know. In fact, this is a short-distance data transmission technology. Today, this technology is very common in our lives, such as the use of flash cards, brush bus cards, and community access control on POS machines. In many large cities, this technology is very convenient for our lives. Today's phones generally have this feature, Apple has also joined the NFC function since the iPhone 6 to prepare for future mobile payments.

For example, for daily data exchange, two NFC-enabled mobile phones can be used together to carry out data transmission through NFC. Compared with Bluetooth, a series of pairing steps are omitted. The NFC-enabled mobile phone can not only read the data on the bus card, but also can recharge the bus card, and even some places can directly use the mobile phone to brush the bus. In terms of mobile payments, it is possible to emulate credit card spending on POS machines that support UnionPay flash payment, even when there is no network.

Heart rate detection (on behalf of models: Samsung's latest S/Note series, Lenovo ZUK Z2 Pro)

Love sports friends all know that the test heart rate can keep the exercise intensity at a normal level, so as to avoid accidents. In the past, old Chinese doctors usually diagnosed by pulse beats. Professional athletes wear heart rate belts. Hospitals use professional heart rate monitors to detect them. Today, mobile phones and wearable smart devices can also perform simple heart rate tests.

Joining the heart rate sensing module is also an innovation of mobile phone manufacturers in recent years. Samsung has already equipped with a heart rate detection module on the S5. In 2016, the ZUK Z2 Pro integrates ten professional sensors and can not only measure the heart rate. Can also detect blood oxygen, ultraviolet light and so on. As people pay more and more attention to their own health status, smart phones such as heart rate sensors can make everyone aware of their own health status at any time.

Volume key (representing model: LG G2)

When LG released this G2, it had been a few years ago. At the time, the biggest highlight of the aircraft's design was that its volume key position was different from the mainstream design at the time and was not on the side of the fuselage. It is on the back of the fuselage. For such design intent, LG also publicly stated that when the size of the mobile phone screen becomes larger and larger, the user is more and more difficult to access the volume keys on the side of the body when the user is operating with one hand, and thus the volume keys Put it on the back, but it is easier to operate.

The LG G2 put the volume keys on the back. Many of the used machine friends at the time said that although this feature requires a certain amount of time to get used to, it is a habit that later finds this design very useful. However, this design has not been recognized by the mainstream market, so far there are few companies on the market use this design, including LG's own product has only lasted three generations, G5 may be due to the reason of the modular design was canceled, but at present According to the news, LG's next-generation flagship G6 does not seem to be using this design anymore.

to sum up

With the development of smart phones, it can be foreseen that there will be only one whole screen left in front of the mobile phone, and then various interesting functions will gradually be focused on the vast undeveloped "land" behind the mobile phone.

Of course, the most important function of the back of a mobile phone is to maintain good grip of the mobile phone, and it is necessary to develop new and interesting functions without affecting the feel of the phone. But after reading these various ideas, people can't wait to see more interesting features.

[This article comes from the Tencent News client from the media, does not represent the views and positions of Tencent News. 】

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