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Touch Screen
- 1. TOUCH SCREENS Represented by: AffanNaim Roll: 114005 Comp. Sc & Engg Orissa Engineering College
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- 4. HISTORY In 1971, thefirst touch screen developed by SAM HURST. The HP-150 from 1983 was probably the world’s earliest commercial touch screen computer.
- 5. HOW DOES ATOUCH SCREEN WORK HOW DOES A TOUCH SCREEN WORK
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- 7. CONTROLLER The controller connectsbetween the touch sensor and the PC Take information from the touch sensor and translate it into information that PC can understand.
- 8. SOFTWARE DRIVER The driveris a software that allows the touch screen and computer to work together
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- 10. RESISTIVE A resistive touchscreen panelis composed of several layers. It consists of a glass that is coated with electrically conductive and resistive layers.
- 11. Advantages of Resistive touchscreen technology… Lower Cost. Can operate with any pointing devices like stylus and nails. Good for hand writing recognition system.
- 12. Disadvantages of Resistive touchscreen technology… Can be relatively easily damaged by scratching. It emits only 75% of light which make the image relatively bulky and dim
- 13. CAPACITIVE It consist ofglass panel with capacitive (charge storing) material coating on its surface. Circuits located at the corners of the screen measure capacitance of a person touching the overlay.
- 14. Advantages of Capacitive touchscreen technology… Visibility of the capacitive touch screen is good even in sunlight. Highly sensitive to finger touch leading to easy to use. Highly transmissivity transmit more than 85% of light.
- 15. Disadvantages of Capacitive touchscreen technology… It is expensive Can not be used with gloved hand and stylus. Need to have at least 5% humidity to achieve capacitive effect.
- 16. INFRARED The infrared touch screenuses 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.
- 17. Advantages of Infrared touchscreen technology… Best image quality Almost all kind of stylus materials can be used. High stability, change in time and environment will not effect.
- 18. Disadvantages of Infrared touchscreen technology… High pressure may causes unwanted target selection. Infrared touch screen has low resolution.
- 19. SURFACE ACOUSTIC WAVE Surfacewave technology uses ultrasonic wave that passes over the touch screen panel. Widely used in application such as computer based training and information.
- 20. Advantages of SAW touchscreen technology… High resolution. SAW technology provides superior image quality. Highly transmissivity transmit more than 92% of light.
- 21. Disadvantages of SAW touchscreen technology… Relatively expansive in comparison to other technology. It must be touched by finger, gloved hand and soft stylus, something hard like a pen, credit card or finger nail won’t work.
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- 23. APPLICATION Smart phones ATM’s Airline ticketterminals Restaurants.
- 24. CONCLUSION Designers are tryingto use touch screen to simplify inputs commands. Today, touch screen has become adopted by computers users of all abilities because it is simple, fast and innovative.
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