TOUCH SCREENS

Represented by:
Affan Naim
Roll: 114005
Comp. Sc & Engg

Orissa Engineering College
OVERVIEW
INTRODUCTION
HISTORY
WORKING
TECHNOLOGIES
COMPARISON
APPLICATION
CONCLUSION
INTRODUCTION
HISTORY
In 1971, the first touch
screen developed by SAM
HURST.
The HP-150 from 1983 was
probably the world’s
earliest com...
HOW DOES A TOUCH SCREEN
WORK
HOW DOES A
TOUCH SCREEN
WORK
TOUCH SENSOR
CONTROLLER
The controller connects between the touch sensor
and the PC
Take information from the touch sensor and translat...
SOFTWARE DRIVER
The driver is a software that allows the touch screen
and computer to work together
TECHNOLOGIES
Resistive
Capacitive
Infrared
Surface Acoustic
Wave
RESISTIVE
A resistive
touchscreen panel is
composed of several
layers.
It consists of a glass
that is coated with
electric...
Advantages of Resistive
touch screen technology…

Lower Cost.
Can operate with any pointing devices
like stylus and nails....
Disadvantages of Resistive
touch screen technology…
Can be relatively easily damaged by
scratching.
It emits only 75% of l...
CAPACITIVE
It consist of glass panel
with capacitive (charge
storing) material coating
on its surface.
Circuits located at...
Advantages of Capacitive
touch screen technology…
Visibility of the capacitive touch screen
is good even in sunlight.
High...
Disadvantages of Capacitive
touch screen technology…
It is expensive
Can not be used with gloved hand and
stylus.
Need to ...
INFRARED
The infrared touch
screen uses an array of
X-Y infrared LED and
photo detector pairs
around the edges of
the scre...
Advantages of Infrared
touch screen technology…
Best image quality
Almost all kind of stylus materials can be
used.
High s...
Disadvantages of Infrared
touch screen technology…
High pressure may causes unwanted
target selection.
Infrared touch scre...
SURFACE ACOUSTIC WAVE
Surface wave technology
uses ultrasonic wave that
passes over the touch
screen panel.
Widely used in...
Advantages of SAW
touch screen technology…
High resolution.
SAW technology provides superior
image quality.
Highly transmi...
Disadvantages of SAW
touch screen technology…
Relatively expansive in comparison to
other technology.
It must be touched b...
COMPARISON
APPLICATION
Smart phones
ATM’s
Airline ticket terminals
Restaurants.
CONCLUSION
Designers are trying to use touch screen to
simplify inputs commands.
Today, touch screen has become adopted by...
THANK YOU
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Touch Screen

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Touch Screen is an electronic visual display which locate the coordinate of user touch within the display area.

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Touch Screen

  1. 1. TOUCH SCREENS Represented by: Affan Naim Roll: 114005 Comp. Sc & Engg Orissa Engineering College
  2. 2. OVERVIEW INTRODUCTION HISTORY WORKING TECHNOLOGIES COMPARISON APPLICATION CONCLUSION
  3. 3. INTRODUCTION
  4. 4. HISTORY In 1971, the first touch screen developed by SAM HURST. The HP-150 from 1983 was probably the world’s earliest commercial touch screen computer.
  5. 5. HOW DOES A TOUCH SCREEN WORK HOW DOES A TOUCH SCREEN WORK
  6. 6. TOUCH SENSOR
  7. 7. 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.
  8. 8. SOFTWARE DRIVER The driver is a software that allows the touch screen and computer to work together
  9. 9. TECHNOLOGIES Resistive Capacitive Infrared Surface Acoustic Wave
  10. 10. RESISTIVE A resistive touchscreen panel is composed of several layers. It consists of a glass that is coated with electrically conductive and resistive layers.
  11. 11. Advantages of Resistive touch screen technology… Lower Cost. Can operate with any pointing devices like stylus and nails. Good for hand writing recognition system.
  12. 12. Disadvantages of Resistive touch screen technology… Can be relatively easily damaged by scratching. It emits only 75% of light which make the image relatively bulky and dim
  13. 13. CAPACITIVE It consist of glass 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. 14. Advantages of Capacitive touch screen 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. 15. Disadvantages of Capacitive touch screen 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. 16. INFRARED The 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.
  17. 17. Advantages of Infrared touch screen technology… Best image quality Almost all kind of stylus materials can be used. High stability, change in time and environment will not effect.
  18. 18. Disadvantages of Infrared touch screen technology… High pressure may causes unwanted target selection. Infrared touch screen has low resolution.
  19. 19. SURFACE ACOUSTIC WAVE Surface wave technology uses ultrasonic wave that passes over the touch screen panel. Widely used in application such as computer based training and information.
  20. 20. Advantages of SAW touch screen technology… High resolution. SAW technology provides superior image quality. Highly transmissivity transmit more than 92% of light.
  21. 21. Disadvantages of SAW touch screen 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.
  22. 22. COMPARISON
  23. 23. APPLICATION Smart phones ATM’s Airline ticket terminals Restaurants.
  24. 24. CONCLUSION Designers are trying to 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.
  25. 25. THANK YOU

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