In computingmulti-touch is technology that enables a surface a trackpad or touchscreen to recognize the presence of more than one point of contact with the surface.

Multi-touch was in use as early as Apple popularized the term “multi-touch” in Plural-point awareness may be used to implement additional functionality, such as pinch to zoom or to activate certain subroutines attached to predefined gestures.

The two different uses of the term resulted from the quick developments in this field, and many companies using the term to market older technology which is called gesture-enhanced single-touch or several other terms by other companies and researchers.

Several other similar or related terms attempt to differentiate between whether a device can exactly determine or only approximate the location of different points of contact to further differentiate between the various technological capabilities, but they are often used as synonyms in marketing.

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Multi-touch is commonly implemented using capacitive sensing technology in mobile devices and smart devices. A capacitive touchscreen typically consists of a capacitive touch sensorapplication-specific integrated circuit ASIC controller and digital signal processor DSP fabricated from CMOS complementary metal-oxide-semiconductor technology.

Capacitive multi-touch displays were popularized by Apple ‘s iPhone in In computingmulti-touch is technology which enables a trackpad or touchscreen to recognize more than one [3] [4] or more than two [5] points of contact with the surface.

Apple popularized the term “multi-touch” in with which it implemented additional functionality, such as pinch to zoom or to activate certain subroutines attached to predefined gestures.

The use of touchscreen technology predates both multi-touch technology and the personal computer. Early synthesizer and electronic instrument builders like Hugh Le Caine and Robert Moog experimented with using touch-sensitive capacitance sensors to control the sounds made by their instruments.

These early touchscreens only registered one point of touch at a time. On-screen keyboards a well-known feature today were thus awkward to use, because key-rollover and holding down a shift key while typing another were not possible.

Inone of the early implementations of mutual capacitance touchscreen technology was developed at CERN [12] [13] based on their capacitance touch screens developed in by Danish electronics engineer Bent Stumpe.

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This technology was used to develop a new type of human machine interface HMI for the control room of the Super Proton Synchrotron particle accelerator.

The screen was to consist of a set of capacitors etched into a film of copper on a sheet of glass, each capacitor being constructed so that a nearby flat conductor, such as the surface of a finger, would increase the capacitance by a significant amount.

InMIT described a keyboard with variable graphics capable of multi-touch detection, for what is very likely to be the very first multitouch screen.

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In the early s, The University of Toronto ‘s Input Research Group were among the earliest to explore the software side of multi-touch input systems.

When a finger or several fingers pressed on the glass, the camera would detect the action as one or more black spots on an otherwise white background, allowing it to be registered as an input.

Since the size of a dot was dependent on pressure how hard the person was pressing on the glassthe system was somewhat pressure-sensitive as well.

InBell Labs at Murray Hill published a comprehensive discussion of touch-screen based interfaces, though it makes no mention of multiple fingers.

Byboth Bell Labs and Carnegie Mellon University had working multi-touch-screen prototypes — both input and graphics — that could respond interactively in response to multiple finger inputs.

Inthe canonical multitouch pinch-to-zoom gesture was demonstrated, with coordinated graphics, on CMU’s system. InPierre Wellner advanced the topic publishing about his multi-touch “Digital Desk”, which supported multi-finger and pinching motions.

Between andthe company Fingerworks developed various multi-touch technologies, including Touchstream keyboards and the iGesture Pad.

Infrench start-up JazzMutant developed the Lemur Input Devicea music controller that became in the first commercial product to feature a proprietary transparent multi-touch screen, allowing direct, ten-finger manipulation on the display.

However, the U. Patent and Trademark office declared that the “pinch-to-zoom” functionality was predicted by U. Patent 7, [36] [37] relating to gestures on touch screens, filed by Bran Ferren and Daniel Hillis inas was inertial scrolling, [38] thus invalidated a key claims of Apple’s patent.

InMicrosoft’s table-top touch platform, Microsoft PixelSense formerly Surface started development, which interacts with both the user’s touch and their electronic devices and became commercial on May 29, Inthe Diamondtouch became a commercial product and is also based on capacitance, but able to differentiate between multiple simultaneous users or rather, the chairs in which each user is seated or the floorpad on which the user is standing.

Small-scale touch devices rapidly became commonplace in In MayApple was granted a patent for a “fusion keyboard”, which turns individual physical keys into multi-touch buttons.

Apple has retailed and distributed numerous products using multi-touch technology, most prominently including its iPhone smartphone and iPad tablet.

Additionally, Apple also holds several patents related to the implementation of multi-touch in user interfaces, [41] however the legitimacy of some patents has been disputed.

Multi-touch sensing and processing occurs via an ASIC sensor that is attached to the touch surface. Usually, separate companies make the ASIC and screen that combine into a touch screen; conversely, a trackpad’s surface and ASIC are usually manufactured by the same company.

There have been large companies in recent years that have expanded into the growing multi-touch industry, with systems designed for everything from the casual user to multinational organizations.

It is now common for laptop manufacturers to include multi-touch trackpads on their laptops, and tablet computers respond to touch input rather than traditional stylus input and it is supported by many recent operating systems.

A few companies are focusing on large-scale surface computing rather than personal electronics, either large multi-touch tables or wall surfaces.

These systems are generally used by government organizations, museums, and companies as a means of information or exhibit display.

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Large scale multi-touch surfaces are manufactured by Finnish company MultiTaction on their 55″ MT Cells 55″ screens who also have office locations in London, California and Singapore.

Multi-touch has been implemented in several different ways, depending on the size and type of interface. The most popular form are mobile devices, tabletstouchtables and walls.

In the past few years, several companies have released products that use multi-touch. Asus ZE550ML Zenfone 2 Dual Sim Phone with 2GB RAM, 16GB ROM — White With a Smart TV device, you can enjoy apps, surf the web under WIFI network, and stream most internet channels from the comfort of your sofa.

Both touchtables and touch walls project an image through acrylic or glass, and then back-light the image with LEDs. Touch surfaces can also be made pressure-sensitive by the addition of a pressure-sensitive coating that flexes differently depending on how firmly it is pressed, altering the reflection.

Handheld technologies use a panel that carries an electrical charge. When a finger touches the screen, the touch disrupts the panel’s electrical field.

The disruption is registered as a computer event gesture and may be sent to the software, which may then initiate a response to the gesture event.

In the past few years, several companies have released products that use multi-touch. In an attempt to make the expensive technology more accessible, hobbyists have also published methods of constructing DIY touchscreens.

Capacitive technologies include: [47]. Resistive technologies include: [47]. Optical touch technology is based on image sensor technology.

It functions when a finger or an object touches the surface, causing the light to scatter, the reflection is caught with sensors or cameras that send the data to software which dictates response to the touch, depending on the type of reflection measured.

It has the same ports and layout as its brother, the GLVM. Also how does the hybrid zoom work?. Lg g pad iv 8 0 fhd control Catalyst Control Center – switchable graphics II. Ads Detailed Technical Specifications General Information Device Type Each device built on different configuration and platform or operating so here we have divided the devices on their operating system such as Android, Windows, iOS etc.

Optical technologies include: [47]. Acoustic and radio-frequency wave-based technologies include: [47].

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Multi-touch touchscreen gestures enable predefined motions to interact with the device and software. An increasing number of devices like smartphonestablet computerslaptops or desktop computers have functions that are triggered by multi-touch gestures.

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Years before it was a viable consumer product, popular culture portrayed potential uses of multi-touch technology in the future, including in several installments of the Star Trek franchise.

In the Disney sci-fi film Tron a device similar to the Microsoft Surface was shown. It took up an executive’s entire desk and was used to communicate with the Master Control computer.

In the film Minority ReportTom Cruise uses a set of gloves that resemble a multi-touch interface to browse through information.

In the film The Islandanother form of a multi-touch computer was seen where the professor, played by Sean Beanhas a multi-touch desktop to organize files, based on an early version of Microsoft Surface [5] not be confused with the tablet computers which now bear that name.

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Inthe television series CSI: Miami introduced both surface and wall multi-touch displays in its sixth season. Multi-touch technology can be seen in the James Bond film Quantum of Solacewhere MI6 uses a touch interface to browse information about the criminal Dominic Greene.

The television series NCIS: Los Angeleswhich premieredmakes use of multi-touch surfaces and wall panels as an initiative to go digital.

In aan episode of the television series The SimpsonsLisa Simpson travels to the underwater headquarters of Mapple to visit Steve Mobbs, who is shown to be performing multiple multi-touch hand gestures on a large touch wall.

In thethe film District 9 the interface used to control the alien ship features similar technology. Created in by R.

Clayton Miller, it combines multi-touch input with a new windowing manager. It splits the touch surface away from the screen, so that user fatigue is reduced and the users’ hands don’t obstruct the display.

An open source community preview of the Con10uum window manager was made available in November, From Wikipedia, the free encyclopedia.

Main article: Pointing device gesture.

Archived from the original on Retrieved 9 November Retrieved Infostructures: A Transport Research Project. Freerange Press. Journal of the Society for Information Display.

Symmetry Magazine.

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Retrieved 16 November CERN Courier. Carnegie-Mellon University Studio Report.

Carnegie Mellon University, CHI ‘ New York: ACM. June A new era for high-precision touchscreens. Advances in Human-Computer Interaction, vol.

The Digital Desk. Hedge Multi-touch: a new tactile 2-d gesture interface for human-computer interaction Proceedings of the Human Factors and Ergonomics Society 45th Annual Meeting, Vol.

Retrieved 26 January Retrieved April Retrieved January 9, Retrieved on Purdue University.