Haptic technology: subvert the touch screen

[Audio Network Information]
Although smart mobile devices bring a lot of new experiences to users, at least in terms of typing, the user experience of mobile devices is far less than the traditional physical keyboard, but the application of haptic feedback technology is likely to change this situation. .

The New iPad conference on March 7 left a suspense.

Before the launch of the conference, Apple began to cooperate with Senseg, a touch-sensing technology company from Finland, to take the touch screen experience of the new iPad to a whole new level. Apple not only invited Senseg to participate in the conference, but also set the slogan of the conference as "We have something you really have to see. And touch", which hinted at the appetite of the outside world.

Although the final release of "Steak" is not as presumed to implant a new generation of touch feedback technology, but perhaps in the next generation of products released next year, this technology will officially meet with you.

The release of the real touch experience "Steak" also made Senseg, an unseen startup, surface.

In 2006, Senseg was founded in Finland. The tactile feedback technology developed by it was able to accurately simulate the surface texture of textiles and was named one of the 50 best inventions of the year in 2011 by Time magazine.

Senseg's tactile feedback technology does not change the physical structure of the device's display. Its principle is to emit an electrical signal that is difficult for the user to detect, creating an oscillating electrostatic field around the skin. When the user touches the display screen, the static electricity can adjust the friction between the finger and the display screen, thereby causing the user to have a realistic texture feeling.

Coincidentally, at this year's Los Angeles International Graphics Annual Conference, a display device called REVEL developed by Disney was amazing, and its technical principle is quite similar to that of Senseg. When the user crosses the REVEL by hand, on the surface, only the hand is in contact with the smooth glass screen, but the user experiences the touch of such things as wood products, walls, pebbles, and the like.

Although this technology has not really been introduced to the market, it is enough to expect from the existing description. Think about it, since the popularity of smartphones, how long have you not been blindly texting? Although the iPhone's frenzy has subverted the mobile phone industry and brought many new experiences to users, at least in terms of typing, the current user experience of mobile devices is far less than the traditional physical keyboard. The application of Senseg and Disney's haptic feedback technology is likely to change this situation.

In fact, in 2009, Microsoft also applied for a patent on "tactile" - "light-induced shape-memory polymer display screen". Contrary to Senseg's principle, Microsoft's technology is precisely to change the physical characteristics of the touch screen so that users feel the same effect as the real scene. It is reported that Microsoft uses a polymer coating with sensitizing and memory properties. Under different wavelengths of ultraviolet light, the coating will harden or soften and return to flatness.

In June of this year, a company called Tactus turned the scene depicted in the Microsoft patent into reality, of course, in a different way. According to the prototype product displayed by Tactus, when the user needs to call the keyboard, the original smooth and smooth touch screen will be magically deformed. Each key of the keyboard will correspond to a circular protrusion, and a physical keyboard will appear in an instant. The touch screen will be restored to its original flat state. This performance is quite similar to the actual effect depicted in the Microsoft patents of the year, but Tactus's technical principles are not the same as Microsoft's.

Tactus adds a so-called "force feedback layer" to the display that is no more than 1 mm thick. The “force feedback layer” is a carefully designed small channel filled with liquid. When a physical keyboard is needed, the distribution of the liquid changes. Through different channels, the liquid accumulates in specific areas of the touch screen. The physical buttons of the blister-like hemispherical protrusions are quite amazing.

Popularization is on the way <br> Apple and Senseg are still on the move, but the old touch technology company Immersion is pushing the haptic technology to the mobile device market.

Gamers and friends are no strangers to this company. The TouchSense force feedback technology developed by it is widely used in the vibration handles of game consoles such as XBOX 360 and PS3. The handles equipped with this technology can make different vibrations in response to the movements in the game screen, such as simulating the vibration of different terrain driving in a racing game.

Founded in 1993, the company has been focusing on the development of touch-related technologies for nearly 20 years. It has accumulated more than 1,200 patents worldwide, and nearly 400 million mobile devices are using the technology developed by it. Compared with the sci-fi Tactus, the technology of this veteran manufacturer is much more pragmatic.

Mobile phone vibration is no stranger to everyone, Immersion's tactile technology is derived from the traditional mobile phone vibration. At present, the vibration function of the mobile phone mainly relies on the built-in LRA (linear resonance actuator) and ERM (rotary deflection quality micro-motor) built in the mobile phone, and they can only provide a fairly basic vibration effect. However, with the development of LRA and ERM, software programming can re-set the vibration effect to achieve rich applications, which is the advantage of Immersion.

During the GSMA Asia Mobile Communications Expo held in Shanghai in June this year, Immersion frequently contacted local manufacturers in just a few days to seek opportunities to enter the Chinese market. At present, the Immersion technology license has already included many well-known manufacturers such as Samsung, LG, Nokia, and Pantech. Among them, Samsung's previous best-selling products, Galaxy S 3 and Galaxy Note, use Immersion technology.

At the show, Immersion showed the media a number of applications using Immersion technology, such as the game's angry birds optimized by tactile feedback. The vibration effect when the user pulls the slingshot is quite different from when the projectile hits the target. Immersion currently offers three different solutions.

First, for OEMs' TouchSense solutions, TouchSense has three low-to-medium-end software solutions, TouchSense 2000, TouchSense 3000 and TouchSense 5000, supporting LRA, ERM, piezoelectric sensors and EAP drivers for use with Imagis and TI drives. .

In addition, Immersion is able to provide a tool called "Integrator" that quickly and easily integrates haptic effects into OEM-customized Android systems to automate the haptic integration process.

Immersion also provides SDKs and a range of other tools for third-party developers, with more than 100 vibration feedback effects preset, such as explosions, plucking strings, and more. Developers can add this effect to games and apps that don't have touch effects.

Dennis Sheehan, vice president of marketing at Immersion, said during the Shanghai media that Immersion's software is very cost-effective and the new cost per mobile phone will not exceed $1.

Although the cost is not a problem, the biggest challenge for Immersion is the power consumption problem. Although the current smartphones can provide a basic vibration experience, many users have chosen to turn off this feature in order to save power.

In any case, the new touch technology is subverting the user experience of smart device touch screens, of course, the most anticipated is still the next generation of iPad. In the context of the iPhone 5's lack of innovation and criticism, will Apple rely on Senseg's tactile feedback technology to make a beautiful turnaround? Everyone will wait and see.

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