Multi Touch Screen

Yong Du

Ayyappan Iyer

Multi Touch Screen

Multi touch Components

• Multi-touch consists of a touch screen or touchpad that recognizes multiple simultaneous touch points and software to interpret simultaneous touches.

Sensing Technique

• FTIR(Frustrated Total Internal Reflection)

Multi Touch History

• Began in 1982 – University of Toronto & Bell Labs.

• Further Enhancements – University of Delaware: 1990.

a) Sophisticated 2-handed typing & gesture systems.

b) Basis for iGesture mousepads & touchscreen keyboards by FingerWorks: 2001.

• Founders joined Apple: 2005.

Jefferson Y. Han

• Research Scientist at New York University’s “Courant Institute of Mathematical Sciences.

• Owner of Perceptive Pixel, Inc.

• Developer of interface-free touch driven screens.

• Developer of various customized graphic applications to be run on multi touch screen.

Products using this technology

• Lemur Input Device – 1st commercial multi-touch display: 2005.

• Apple iPhones – 2007.

Other products using multi-touch with more diverse finger gestures:

• Apple's iPod touch, MacBook Air & Microsoft’s Surface Technology.

Apple’s plan to implement above technology in following generations of MacBook and MacBook Pro Notebooks, similar to iPhones & MacBook Air.

Unique features

• Multiple independent touch senses.

• Customizable to use any compatible software and applications.

• Rotation of 3D Images in either direction.

• Support for multiple interactive user sessions.

Potential future applications of technology

• Graphic Designing.

• Interactive maps.

• Computer screens – keyboards and mouse interaction using fingers.

• Games.

• Military & Space Command Control Centre.

Sample Multi Touch Demo Video

http://www.youtube.com/watch?v=he-j1BbZf58