Recently, Xiaomi released the first annual flagship noise-canceling headphones FlipBuds Pro, the brand for the first time to pressure-sensitive touch control technology (referred to as pressure-sensitive technology) applied to TWS headphones, users can realize a variety of pressure-sensitive touch control operation by lightly touching and long-pressing the ceramic touch back cover, which means that the application of pressure-sensitive technology of the TWS headphones added another member of the generals are moving towards the development of the future of the blossom of a hundred flowers.
In fact, most of the TWS headphones use capacitive touch, the technology utilizes the touch chip by monitoring the capacitance change between the human body and the touch button sensing parts, touch control operation. Since the contact surface of TWS headphones is very small, it is easy to mistakenly touch and give wrong commands to the headphones through the traditional X and Y axis dimension form of interaction; when giving commands through tapping the headphones, it may generate noise and even cause the headphones to fall off, affecting the user experience.
Pressure-sensitive technology: multi-level interaction, eliminating false touches
Different from the traditional capacitive touch X, Y axis dimension of interaction, pressure-sensitive technology to create a new dimension of interaction, can be realized in the Z-axis multi-level interaction, such as pinch a pinch, pinch two/three times, long pinch and other operations to give accurate commands, not only to avoid the occurrence of accidental contact, but also simple to operate, does not affect the safety of wearing, for TWS headset users to bring a more convenient, efficient, accurate and multi-functional operation, greatly improving the user experience. The user's experience is greatly enhanced. Not only touch method, pressure touch technology can also be designed according to the intensity of pressure, touch position and other operating instructions, for more simple, interesting "play" to retain the space to play.
Piezo-electricity: the ultimate solution for true pressure sensing
Even though the pressure sensing technology has a thousand good, but also can not resist the market endless pressure sensing solution is full of "accidents" in the fact that most of them can not start the volume, the reasons are: high chip cost, no way to patch, assembly difficulty, PCB design space is not enough, the consistency of the production can not be guaranteed, can not be guaranteed the consistency of the use of the environment, Low yield leads to high production costs, etc.
Maybe you want to say: Apple headphones have a very good operating experience and can be produced and sold! Indeed, Apple is a rare TWS headphone brand that sticks to the pressure-sensitive solution, but it costs a fortune in production. Have process issues? Get the world's top foundry! At this point, Apple's arrogance has been fully realized.
Back to the main topic, there is no high enough profit to support the cost of the top foundry brand, how to choose the pressure-sensing solution - this is the core of the problem we are exploring.
Piezoelectricity has a variety of inherent advantages, both in terms of cost and mass production, pressure sensing is currently the optimal ultimate solution: it does not require strong engineering strength, nor does it require top-notch manufacturing capabilities, fast entry, low threshold, and controllable cost.
Piezoelectric Solutions
AUDIOWELL, the industry's leading smart sensor manufacturer and solution provider, has joined hands with Reynolds Semiconductor to provide the TWS industry with a complete set of solutions, including sensors, based on piezoelectric tactile sensing (piezo-electricity) technology, and has already mass-produced four major series of products.
The piezoelectric series products launched by the two companies provide two sets of solutions for different customer requirements, namely the separation of sensor and conditioning chip, and the SOC. In addition to the above advantages, the piezoelectric solution has the following guaranteed features:
Automatic calibration of piezoelectric sensors
Theoretically, all kinds of sensors have consistency problems, and there is no perfect solution in the market at present. The piezoelectric solution of the conditioning chip specifically for this problem to deal with, in the production process can be automatically verified, so that each motherboard has the same performance baseline.
PCBA's parameters calibration DSP
The same batch of PCBA have material and component parameter differences, which will lead to the conditioning chip on the voltage and capacitance parameters such as the detection of the base point is not the same, thus affecting the sensitivity or cause misuse. It designed a targeted DSP processing module.
Parameter calibration DSP for usage environment
Different use environments can cause various Sensor parameter differences, thus affecting the headset's manipulation error. The sensor of this piezoelectric solution has designed a targeted DSP processing module for this purpose.
Recommended Products：AUDIOWELL Pressure-Touch Sensor
The sensor applied in the solution is a kind of operation interaction sensor based on pressure touch technology. The product realizes advanced seamless design, easier dustproof and waterproof, longer life and better experience.
High sensitivity
The recognition sensitivity is very high, and the pressure sensitivity can reach milligram level.
High Accuracy
Different sensitivities can be designed within a reasonable range according to application requirements to ensure the accuracy of user operation.
Low Power Consumption
With the characteristic of reversible self-generated charge, small working current, low power consumption and safer.
Good consistency
Strictly made in accordance with the performance, process, specifications and other requirements, good consistency.
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