Demand for high-definition real haptic feedback jumps in integration / high-performance momentum

Electronic enthusiasts news : Haptic technology has decades of history, can provide tactile feedback through a touch-based interface, widely used in portable devices with touch screen, consumer, industrial electronic equipment. As the demand for haptic feedback continues to escalate, how can semiconductor manufacturers respond to the challenges and opportunities that arise? With all kinds of doubts, the editor of Electronic Audiophile Network conducted an exclusive interview with Mr. Xin Benwei, business development manager of high-performance analog products developed by Texas Instruments (TI) China, to understand how Texas Instruments can play its potential advantages and provide an unparalleled market Performance and highly integrated solutions.

New demand for tactile feedback jumps

Devices using haptic technology are committed to providing a new, user-friendly user experience and unparalleled value. The demand for high-definition / real haptic feedback is rising, and the high-definition haptic experience and real haptic feedback effect have low power consumption, audio signal conversion to haptic mode, faster startup and braking time, stronger vibration intensity Low system complexity and other aspects have high requirements.

Texas Instruments (TI) China market development high-performance analog product business development manager Xin Benwei

Toshiba Instruments (TI) China market development high-performance analog product business development manager Xin Benwei said: For haptic drivers, higher integration, more realistic experience, greater vibration force and the smallest solution size are The general trend.

Highly integrated / high performance haptic driver-the first choice for development designers

In today's society, whether it is a smartphone or tablet, but also including TV remote controls, computer peripherals, household appliances, automobiles, and even medical equipment and industrial control fields, with the wide application of capacitive touch screen and touch key products, more and more The more and more, the demand for the stereoscopic feeling of flat buttons is higher and higher. This is the stage of "high integration" and "high performance" haptic drivers. This is a brand-new product, which not only brings human feeling, but also can play a series of functions such as touch prompt, goal realization prompt and so on, and as the product becomes thinner and thinner, the internal space is more and more scarce.

In view of this, Mr. Xin Benwei took Texas Instruments' two most representative haptic drivers as an example to explain in depth why "highly integrated" and "high performance" haptic drivers are the first choice for future development designers.

Generally speaking, ordinary drivers not only need multiple tests and adjustments for each digital waveform, but in actual work, the main chip requires new instructions from the chip, and there are many peripheral components, and there is no self-protection circuit. In contrast, digital waveform generation is highly integrated with high-voltage drivers and 2kB RAM, which not only requires no external components, but also allows the haptic driver to store and recall haptic waveforms instantly. Represented by the industry's most integrated piezoelectric haptic driver DRV2667, the driver can realize real-time playback of various haptic effects, such as haptic effects from the Immersion TouchSense 5000 haptic effect library; Bring high-definition tactile experience to users.

In addition, the real tactile feedback effect is also one of the important factors considered by users. To some extent, the actual haptic feedback depends on the starting and braking time, vibration intensity, etc. Mr. Nobumoto introduced that DRV2605 is the only eccentric rotor motor (ERM) and linear resonance actuator (LRA) haptic driver with a library of 123 unique haptic effects. The library is a leading developer of touch feedback technology And the licensee Immersion to design and provide licenses. In addition, DRV2605 also uses an intelligent loop architecture. Compared with similar competitive solutions, it can not only reduce the starting and braking time by half, achieve twice the vibration intensity, but also reduce power consumption by 50% and extend battery life. In addition, it also supports a variety of interface inputs, and it integrates a protection circuit, internal storage unit, verification circuit, detection circuit and intelligent drive circuit. Only one capacitor is needed on the periphery, and no other components are required. The various advantages of the haptic driver DRV2605 give it unparalleled performance and true haptic feedback.

——This article is selected from the “High-end Interview Column” of the “Effective Touch Technology Issue” of the Electronic Audiophile Network in October. Please indicate the source for reprinting.

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