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    Ppt on touch screen Ppt on touch screen Presentation Transcript

    • Touch Screen Technology
    • Group members Alisha Korpal Amandeep Singh Kalsi Kirandeep Kaur
    • Overview
      • Introduction
      • History
      • Components
      • Technologies
      • Pros & cons
      • Applications
      • Conclusion
    • Introduction
      • A touch screen is a display that can detect the presence and location of a touch within the display area.
      • Touch screen can also sense other passive objects such as stylus.
    • History
      • Touch screens emerged from academic and corporate research labs
      • In 1971, the first "Touch Sensor" was developed by Doctor Sam Hurst (founder of Elographics) while he was an instructor at the University of Kentucky.
    • Contd…
      • This sensor, called the “Elograph”.
      • Touch screens first gained some visibility with the invention of the computer-assisted learning terminal, which came out in 1975 as part of the PLATO project .
    • Components
      • A basic touch screen has three main components :
          • Touch sensor
          • Controller
          • Software driver
    • Touch sensor
      • A touch screen sensor is a clear glass panel with a touch responsive area.
      • The touch sensor is placed over a display screen so that the responsive area of the panel covers the viewable area of the screen.
    • Controller
      • The controller connects between the touch sensor and the PC.
      • Take information from the touch sensor and translate it into information that PC can understand.
    • Software Driver
      • The driver allow the touch screen and computer to work together
      • This makes touching the screen as same as clicking the your mouse at the same location on the screen.
      • Resistive
      • Surface acoustic wave
      • Capacitive
      • Infrared
      • Optical Imaging
      Technologies
    • Resistive
      • composed of several layers
      • Two Electrically conductive layers
    • Surface acoustic wave
      • uses ultrasonic waves
      • Surface wave touch screen panels can be damaged by outside elements.
      • When the panel is touched, a portion of the wave is absorbed.
    •  
    • Open Frame SAW Touch Monitor
    • Capacitive
      • Consist of an insulator such as glass
      • Coated with transparent conductor such as ITO (Indium Tin Oxide)
      •   touching the surface of the screen results in a distortion of the screen's electrostatic field, measurable as a change in capacitance.
    •  
    • Infrared
      • An infrared touch screen uses an array of X-Y infrared LED and photo detector pairs around the edges of the screen to detect a disruption in the pattern of LED beams.
    • Optical imaging
      • In this two or more image sensors are placed around the edges of the screen. A touch shows up as a shadow and each pair of cameras can then be pinpointed to locate the touch.
    • Comparison
    • PROS & CONS
    • PROS
      • User friendly
      • Fast response
      • Error free input
      • Use finger , fingernail , gloved hands , stylus or any soft tip pointer
      • Easy to clean
      • Does not interfere mouse and keyboard
      • Make computing easy , powerful and fun
      • It benefits children
    • CONS
      • Finger stress
      • Fingerprints
      • screen has to be really big not to miss things when pressing them with your finger
      • big screen leads to low battery life
      • touch screen means screen can’t be read too well in direct sunlight as it applies an additional not 100% transparent
      • Fatigue
    • Applications
      • Museums
          • Library resource guides
          • Corporate information
          • Airport terminal passenger internet and emails
          • ATM’s
          • Restaurants'
          • Grocery stores
    • Conclusion
      • Designers are trying to use touch screen to simplify input commands
      • Today , touch screen has becomes adopted by computers users of all abilities because it is simple, fast and innovative.
      • In future there is no usage of mouse and keyboards as they will be replaced by touch screen .
    • References
      • http:// www.google.co.in/#q = Touch+screen+technology&as_sitesearch = wikipedia.org&sa = X&ei =LjVqTf2TL86GrAfO7ujCCw&ved=0CC4Q2wE&hl= en&biw =1280&bih=869&fp=dcc4ce35a3a0f2a4
      • http:// www.google.co.in/#sclient = psy&hl = en&site =&source= hp&q = ppts+on+touch+screen+technology&aq =0&aqi=g1&aql=& oq = PPTs+on+Touch+screen&fp =1&cad=b
      • http://www.scribd.com/doc/29866129/Touchscreen-technology-ppt-by-pavan-kumar-M-T
      • http://wiki.fluidproject.org/display/fluid/Benchmarking+-+Touch+Screen+Options
    • Thank you