01 Aug About iPhone’s vibration motor
In fact, Taptic Engine is not only the vibration feedback of 3D touch. Maybe it will become the focus of Apple’s mobile experience for a long time in the future. Even if its application on the iPhone 6S is not so dazzling, the iPhone of the future is likely to make rapid changes in this regard.
What vibration motors were used in previous iPhones?
Judging from the previous disassembly of iFixit for iPhones, the past iPhones mainly used a vibration motor called ERM eccentric rotor motor, or actuator. If you’ve seen the inside of the iPhone and how the motor works, it should be easy to understand how it vibrate.
The above pictures are the ERM vibration motors used by the past generations of iPhones. There is an off center rotor on them. After it rotates, it can produce an all-round extreme tremor experience. The positive voltage motor rotates and the negative voltage motor is applied to brake. This kind of actuator is characterized by lower cost and a long history, because there is no problem in using it.
In fact, on the iPhone 4S (and the CDMA version of iPhone 4), apple used a LRA linear resonant motor, but it returned to ERM again on the iPhone 5, 5C and 5S based on the consideration of space utilization. Since then, iPhone 6, 6S, and the foreseeable future, will probably use linear vibration motors for some time. This kind of motor is totally different from ERM motor in structure, as the name implies, it achieves a linear motion mode of vibration.)
The advantages of linear vibration motor compared with eccentric rotor motor are quite clear. On the one hand, the combination of spring and magnet can reduce the power consumption a lot, and the vibration combination mode and speed can be more diverse and free. More importantly, the vibration is more elegant and refreshing. It will not be placed on the table like some ERM mobile phones. When the message vibrates, the mobile phone will soon disperse Frame.
What’s so special about the Taptic Engine of the iPhone 6S?
In fact, the iPhone 6 and 6 plus have started to use linear vibration motors, and the volume of vibration motors has obviously become much larger, especially for iPhone 6 (strangely, the vibration motor of 6 plus is smaller, and the battery capacity of 6 plus is expected to be larger than that of 6 plus). It seems that few components dare to take up such courage when it takes up so much space on the expensive iPhone.
Compared with the vibration of iPhone 6 and 5S, the 6S is naturally a higher level. It is often said that when a mobile phone clicks on the screen button, the vibration feedback is more sensitive, clearer and sharper. What is the cause of this?
How wonderful is the taptic engine vibration motor of iPhone 6S?
We compare the 6S vibration motor to a high-speed sports car, and the 5S vibration motor to an affordable compact car. At 0-100 acceleration, the explosive force of the sports car is enough to leave the latter far behind; and when the brake is applied at the same time, the former can brake faster. This is also an index that the vibration motor should achieve, that is, how long it takes for the waveform to reach 90%, and the acceleration becomes the key. That is, when the user presses his finger on the screen, the vibration motor will give the maximum amplitude. Naturally, the faster the better. At the same time, it can brake at the fastest speed when it needs to stop. Only in this way can we have a clear and sensitive sense, and human beings are so paranoid about the millisecond response.
The linear vibration motor has this advantage in structure, so if you put an iPhone 6 and an iPhone 5S in your left and right hands, you can clearly feel that 5S is soft at the end of the vibration and ends more slowly. And the taptic engine of the iPhone 6S has reached a new height: according to apple, it takes at least 10 vibrations for the vibration motor of a mobile phone to reach full load, while the taptic engine only needs one cycle to start and stop quickly. Another “mini tap” can achieve a vibration micro control of 10 MS, which is said to be very close to “real-time feedback”.
Because Apple has published too little information about Taptic Engine, we can’t know its technical secrets and specific principle parameters. However, iDownloadBlog recently compared its vibration mode with that of iPhone 6. The main difference is that the 6S vibration is more elegant and delicate, while the iPhone 6 is obviously more dynamic and static when shaking.
What’s more, among the various information tips and vibration options of IOS (many people may not know that the iPhone supports different rhythm vibration cues, such as heartbeat, staccato, symphony, etc.), the iPhone 6S has a default vibration option called synchronization, which can almost achieve the vibration rhythm completely synchronized with the prompt tone. As mentioned above, it needs excellent vibration start-up and stop performance. The past iPhone, even the iPhone 6, which has already used linear vibration motor, can’t do it.
It could be the future of touch-screen phones
How to treat Apple’s paranoia on a vibrating motor? It can be seen from the fact that Apple watch was the first to enable this taptic engine. Be made one’s own way to make complaints about the Apple Watch’s limited space, and Apple also resolutely determined Taptic Engine to occupy a large space (though it was combined with trumpet), and think of a larger Taptic Engine inside the iPhone 6S. Apple still has a strong value for vibration feedback.
Isn’t it just a vibrating motor? Why do you want to make such a move, but also take a name, printed logo. And to tell you the truth, the vibration experience of the iPhone 6S has not reached the state of perfection, and there is not much quality gap with the past iPhone. However, based on Apple’s momentum, we can predict the future. Apple is ready to do a lot in tactile feedback.