Mobile phone screen size is divided into two concepts: physical size and display resolution. For example, the screen size of two mobile phones is about the same, but one can only display two lines of Chinese characters, and the other can display five lines of Chinese characters. Regardless of the font size difference, the key is the resolution of the screen. The latter resolution is larger, and naturally more lines of Chinese characters can be displayed under the same font size.

It refers to the number of pixels displayed on the display, 4K>2K>1080P.

Represents the relative ratio of the screen area to the front panel area of the phone.

Also called pixel density, it represents the number of pixels per inch. Therefore, the higher the PPI value, the higher the density of the display screen. Of course, the higher the display density, the higher the fidelity.

The brightness of the visible screen in the sun is 504nits.

It is the control center system of the whole mobile phone and the control center of the logic part. The microprocessor achieves the purpose of control by running the software in the memory and calling the database in the memory, and tests the product score according to the Anthare score running software, so as to judge the performance quality of the running game.

The CPU frequency is the clock frequency of the CPU. In short, it is the operating frequency of the CPU during operation (the number of synchronization pulses occurring within one second). The unit is Hz. It determines the running speed of the computer.

That is, how many cores a CPU consists of. The more cores, the faster the CPU runs and the better its performance. For the same data processing, a core CPU is equivalent to one person processing data, a dual core CPU is equivalent to two people processing the same data, and a four core CPU is equivalent to four people processing the same data. Therefore, the more cores processed, the higher the CPU efficiency.

Also known as display core, visual processor and display chip, it is a microprocessor specially used for image computing on personal computers, workstations, game consoles and some mobile devices (such as tablets, smart phones, etc.). It can test the score through 3Dmark scoring software to determine the strength.

The actual available capacity will decrease and vary due to many factors: because the operating system occupies part of the memory (RAM), the actual available space is less than the identified memory capacity; Since the installed operating system and pre installed programs occupy part of the flash memory (ROM), the actual available storage space is less than the identified flash memory capacity.

There are generally two kinds of camera sensor elements on the market, CMOS sensor and CCD sensor. CMOS can also be divided into two types: backlit and stacked. These two processes are just different, and there is no difference between them. The advantage of the back lighting type is that it has a good sensitivity to light, even under the conditions of strong or weak light, it also has good performance. Stack type has the advantage of large photosensitive area.

In general, the smaller the value, the larger the aperture, and the larger the aperture, the more light that can be analyzed by the sensor. This kind of camera generally performs well in dark and cloudy days and other occasions with weak light.

The WIFI Alliance has simplified the name of the WIFI standard, and the new WIFI name is WIFI 4/5/6.

WIFI 4 contains some of the most common standards, such as 802.11 a/b/g/n, which are called 2.4G WIFI. Their characteristics are universal and cheap. The single antenna has a maximum rate of 150Mbps, supports two kinds of bandwidth and 4-way aggregation, and is universal in the world.

WIFI 5 is called 802.11 ac standard. Its main frequency band is 5.0Ghz, and the fast band of the signal band is raised to 80Mhz at most, up to 160Mhz at most. In addition, the modulation efficiency is improved by 10%, and the maximum theoretical transmission rate of WIFI of the ac standard will reach 1Gbps.

WIFI 6 is the new name of the new generation 802.11 ax. It continues to be backward compatible, supporting 2.4G and 5G, and 802.11a/b/g/n/ac compatible. In dense areas, the maximum throughput can reach four times of ac.

Namely, near-field communication function, NFC is Near Field The abbreviation of Communication is short range wireless communication technology. NFC, jointly developed by Philips and Sony, is a non-contact identification and interconnection technology that enables close wireless communication between mobile devices, consumer electronics, PCs and intelligent control tools.

Normal charging lasts for 30 minutes, and the power exceeds 60%, which belongs to fast charging.

Hi Fi is the abbreviation of English High Fidelity, which is literally translated as "High Fidelity". It is defined as a playback sound that is highly similar to the original sound.

The "three proofing" function means that the mobile phone or camera has the function of "dustproof, shockproof and waterproof".

IP68 is the highest level of connector waterproof grade standard. The evaluation of waterproof performance of waterproof connector mainly depends on the following two digits XX of IPXX. The first digit X is from 0 to 6, and the highest grade is 6; The second X is from 0 to 8. The highest grade is 8.

Gravity sensor, also known as gravity sensor, is a new type of sensor technology. It uses elastic sensing elements to make cantilever displacement devices, and uses energy storage springs made of elastic sensing elements to drive electrical contacts to complete the conversion from gravity changes to electrical signals. At present, the vast majority of high-end smart phones and tablets have built-in gravity sensors, such as Apple's series of products iPhone and iPad, Android series of mobile phones, etc.

5G is the fifth generation communication technology, which is characterized by millimeter wavelength, ultra wideband, ultra-high speed and ultra-low delay. Its peak theoretical transmission speed can reach tens of gigabits per second, hundreds of times faster than the transmission speed of 4G network. It meets the ultra-high requirements for network speed of 3D structured light video communication, Internet of Things, automatic driving and other services.

It is also called face recognition, face image recognition, face recognition, etc. It is a biometric based recognition method, using a universal camera as a recognition information acquisition device. The face image of the recognition object is acquired in a non-contact way, and the computer system completes the recognition process after the image is acquired and compared with the database image. Compared with traditional identification methods such as fingerprint identification, it has the characteristics of real-time, accuracy, high precision, easy to use, high stability, difficult to counterfeit, high cost performance and non intrusion.

Identity recognition is based on the iris in the eye. The iris is a circular part between the black pupil and the white sclera, which contains many interlaced spots, filaments, crowns, stripes, recesses and other details. And the iris will remain unchanged throughout the life course after the formation of the fetal development stage. These features determine the uniqueness of iris features and identity recognition.

Wireless charging of mobile phones adopts low-power wireless charging, which uses electromagnetic induction. The charger and the electric device transmit energy in a magnetic field, and there is no wire connection between the two. Therefore, the charger and the electric device can be free of exposed conductive contacts.

It refers to the process of switching to mobile power to discharge and charge other electronic devices when the mobile phone is connected to other devices. At this time, the mobile phone will become a charging bank. When the mobile phone with reverse charging function detects that an OTG device supporting data exchange between devices is inserted, the mobile phone outputs voltage to the VBUS on the USB data line and prompts reverse charging.

PC data synchronization is an automatic function, that is, after the phone is connected to the computer, many items are automatic, such as synchronizing memos, tasks, backup contacts, and so on. There is no need to find and open folders layer by layer, which saves a lot of time.

It is a magnetic field sensor made according to Hall effect. Its function is the Hall switch, which can make our phone case smart. The specific effect is to open the bright screen and close the black screen.

It is also called angular velocity sensor. On mobile phones, it is impossible to measure or reconstruct the complete 3D motion with only accelerometers. G-sensor can only detect the axial linear motion. However, the gyroscope can measure the rotation and deflection well, so that the user's actual action can be accurately analyzed and judged. Then according to the action, you can do the corresponding operation on the phone.

It is a more advanced automatic scene recognition function, but compared with some past mobile phones in scene recognition, AI shooting is more powerful than shooting at night, which can help shoot pure night scenes through more powerful algorithms. Although it has made a lot of progress compared with the previous automatic photography, there is still a disadvantage. That is, some mobile phones call AI photography, which only integrates the past software and applications into the system, such as beauty filters.