Xiaomi 10 comes standard with an advanced X-axis linear motor, which can provide stronger and clearer vibration and gradually becomes the standard of flagship mobile phones.
So how is it different from the traditional rotor motor? Today, Xiaomi officially conducted an in-depth science popularization.
1. What's the difference between different motors?
The motor is the power source that provides vibration for the mobile phone. There are two main types: one is eccentric rotating mass, and the other is linear resonant driver. Linear motors are divided into Z-axis linear motors and X-axis linear motors.
The rotor motor is similar to the motor used in our childhood four-wheel drive. The principle is very simple, that is, a small motor drives the eccentric rotor to rotate, thus generating vibration.
Simple structure and small size, it will be common in many low-end products at present, and a few high-end machines are still in use.
The main disadvantage of rotor motor is its slow response speed, which can not realize emergency start and emergency stop, which makes the vibration of mobile phone delayed. The vibration effect of "buzzing" is produced by this kind of flat rotor motor, so it almost stays in the thousand yuan machine at present.
The linear motor is similar to a pile driver, and consists of a stator and a rotor. The stator consists of a coil and an FPC, and the rotor consists of a mass block and a magnet. The energized coil is subjected to Lorentz force in the magnetic field, and the rotor moves back and forth in a fixed direction, resulting in vibration. The frequency of the motion depends on the frequency of the driving signal.
Linear motor has fast response speed, strong vibration sense, adjustable vibration direction, vibration frequency and waveform, so it can achieve more complex and customized vibration effect.
Z-axis linear motor, also known as circular linear motor, moves in the vertical Z-axis direction with relatively short vibration stroke.
X-axis linear motor, also known as rectangular or transverse linear motor, can realize long stroke and long acceleration time, so it has stronger vibration sense and the best performance than Z-axis linear motor, which is generally seen on flagship models.
Linear motor and rotor motor not only have different structures, but also have different driving schemes.
The linear driving chip can output the peak voltage as high as 10V, which can further shorten the start-stop time and improve the vibration intensity under high voltage driving. Dozens of vibration waveforms built into the driver chip can cooperate with an audio decoder to realize audio vibration.
Through the later experience optimization, accurate and targeted vibration feedback can be achieved in various scenarios.
However, the rotor motor does not support high-voltage drive output or built-in drive waveform.
Comparison of driving schemes between linear motor and rotor motor
It doesn't matter if you don't understand the above, but focus on it:
X axis linear motor >: Z axis linear motor >: rotor motor >: flat rotor motor
Second, how to measure the quality of the mobile phone motor?
1, start-stop time and vibration intensity
Start-stop time and vibration amount (representing vibration intensity) are two key indicators to measure the quality of a motor, and they are also the key to whether it can be "short and powerful".
Let's take a look at the key data comparison of mainstream mobile phone motors on the market:
Under the short vibration voltage of 8V, the start-stop time of X-axis linear motor on Xiaomi 10 is 4ms, and the peak vibration amount is as high as 3. 1Gpp. Based on this, Xiaomi 10 can realize crisp feedback similar to a mechanical keyboard, which is short and powerful.
Mobile phones equipped with rotor motors or even some linear motors will still have the effect of "buzzing", which is precisely due to the long start-stop time and the inability to stop urgently.
2. System adaptation is more critical.
Good hardware performance is only a foundation of excellent experience. MIUI has also been optimized in a very detailed way, and as many as 153 vibration scenes have been customized.
3, UI interactive touch
MIUI has customized different vibration effects for the interactive operation of different interfaces. For example, short and moderate vibration feedback is provided through interface buttons such as dial, calculator keyboard and input method.
Optical vibration feedback is provided below the interface light buttons such as floating buttons and virtual buttons.
Under the function operation buttons such as recording button, notification bar switch and camera button, it provides two short and moderate vibration feedbacks. ...
4. Scenes where the bell vibrates
As mentioned above, the built-in vibration waveform of the driver chip and the AP audio decoder can realize audio vibration and make the ringtone vibrate according to the rhythm.
In MIUI, different ringtones have different vibration effects, and the vibration effects match the melody of ringtones, which makes ringtones more diverse and achieves a more three-dimensional and multi-dimensional reminder effect.
5, the game 4D shock
Through the identification of various game audio in the game, such as the sound of guns and vehicles, MIUI has also customized many games for 4D earthquake sensation: different scenes (flying/jumping to the ground/vehicle collision …), different weapons (AKM/AWM/VSS…) and different kills (ordinary kills/head shots/more than three kills …) have different vibration effect feedback.
When you drive a motorcycle in the game, you can not only hear the roar of the motorcycle, but also feel the vibration from the mobile phone.
And when you change into a bouncing car, you can feel another kind of vibration feedback that matches the car.
This X-axis linear motor has brought various and varied 4D seismic sensations, which can greatly enhance the sense of presence and immersion in the game. Various 4D seismic sensations and related game adaptations are still being updated.
Xiaomi 10 was released in February this year. At present, it is still the benchmark product in the domestic flagship mobile phone! I hope it helps you.