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Ppt on touch screen


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  • 1. Touch Screen Technology
  • 2. Group members Alisha Korpal Amandeep Singh Kalsi Kirandeep Kaur
  • 3. Overview
    • Introduction
    • History
    • Components
    • Technologies
    • Pros & cons
    • Applications
    • Conclusion
  • 4. 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.
  • 5. 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.
  • 6. 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 .
  • 7. Components
    • A basic touch screen has three main components :
        • Touch sensor
        • Controller
        • Software driver
  • 8. 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.
  • 9. 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.
  • 10. 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.
  • 11.
    • Resistive
    • Surface acoustic wave
    • Capacitive
    • Infrared
    • Optical Imaging
  • 12. Resistive
    • composed of several layers
    • Two Electrically conductive layers
  • 13. 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.
  • 14.  
  • 15. Open Frame SAW Touch Monitor
  • 16. 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.
  • 17.  
  • 18. 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.
  • 19. 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.
  • 20. Comparison
  • 21. PROS & CONS
  • 22. 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
  • 23. 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
  • 24. Applications
    • Museums
        • Library resource guides
        • Corporate information
        • Airport terminal passenger internet and emails
        • ATM’s
        • Restaurants'
        • Grocery stores
  • 25. 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 .
  • 26. References
    • http:// = Touch+screen+technology&as_sitesearch = = X&ei =LjVqTf2TL86GrAfO7ujCCw&ved=0CC4Q2wE&hl= en&biw =1280&bih=869&fp=dcc4ce35a3a0f2a4
    • http:// = 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
  • 27. Thank you