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TOUCHSCREEN TECHNOLOGY
BY :-
JITAMITRA MOHANTY
1141016336
ECE-C
6/2/2015 1
CONTENTS
• INTRODUCTION
• HOW DOES IT WORKS?
• TOUCH SCREEN TECHNOLOGIES
• USAGE
• MULTI-TOUCH TECHNOLOGY
• ADVANTAGES
• D...
INTRODUCTION
 A touch screen is an input device
that allows users to operate a
device by simply touching the
display scre...
Working of Touchscreen
Touch Sensor
Controller
Drivers
6/2/2015 4
Touch Sensor
• A touch screen sensor is a clear glass panel with a touch responsive surface.
• The sensor generally has an...
Controller
• The controller is a small PC card that connects between the touch sensor
and the PC.
• The controller determi...
Drivers
• The driver is a software that allows the touch screen and computer to work
together.
• Most touch screen drivers...
TOUCHSCREEN TECHNOLOGIES
Resistive touch screen
Capacitive touch screen
Surface capacitive
Projected capacitive
Infrared t...
Touchscreen Technology
Resistive Touch:
• A resistive touchscreen panel comprises several layers, the
most important of wh...
Continued……
Resistive touch screen deliver:
• cost-effective
• Durable
• Consistence performance
[ref-3]
6/2/2015 10
CAPACITIVE TOUCH SCREEN
• A capacitive touch screen
panel is one which consists
of an insulator such as glass,
coated with...
INFRARED TOUCH SCREEN
• An infrared touch screen
uses a ray of X-Y infrared
LED and photodetector pairs
around the edges o...
Infrared Touch Screen
6/2/2015 13
[ref-5]
USAGE
 Finger stress:
With stressing the finger on the desired
area of the touch screen, the input is taken by
the sensor...
MULTI-TOUCH TECHNOLOGY
• On touch screen displays, multi-touch refers
to the ability to simultaneously register three
or m...
ADVANTAGES
User friendly
Fast response
Error free input
User finger, finger nail, gloved hand,
stylus or any soft tip ...
DISADVANTAGES
Finger stress:
Stress on human fingers when
used for more than a few minutes at a
time. (for example, ATMs)...
CONCLUSION
Though the touch screen technology
contains some limitations with it, it is
fast, accurate, user friendly and f...
REFERENCES
[1]“Company history from Elographics to Elo TouchSystems, 1971 -
present - Elo TouchSystems - Tyco Electronics”...
6/2/2015 20
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Touchscreen technology

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Touchscreen technology

  1. 1. TOUCHSCREEN TECHNOLOGY BY :- JITAMITRA MOHANTY 1141016336 ECE-C 6/2/2015 1
  2. 2. CONTENTS • INTRODUCTION • HOW DOES IT WORKS? • TOUCH SCREEN TECHNOLOGIES • USAGE • MULTI-TOUCH TECHNOLOGY • ADVANTAGES • DISADVANTAGES • CONCLUSION 26/2/2015
  3. 3. INTRODUCTION  A touch screen is an input device that allows users to operate a device by simply touching the display screen.  The term generally refers to touch or contact to the display of the device by a finger or hand. 36/2/2015 [ref-Google images]
  4. 4. Working of Touchscreen Touch Sensor Controller Drivers 6/2/2015 4
  5. 5. Touch Sensor • A touch screen sensor is a clear glass panel with a touch responsive surface. • The sensor generally has an electrical current or signal going through it and touching the screen causes a voltage or signal change. [ref-Google images] 6/2/2015 5
  6. 6. Controller • The controller is a small PC card that connects between the touch sensor and the PC. • The controller determines what type of interface/connection you will need on the PC. [ref-Google images] 6/2/2015 6
  7. 7. Drivers • The driver is a software that allows the touch screen and computer to work together. • Most touch screen drivers today are a mouse-emulation type driver. [ref-Google images] 6/2/2015 7
  8. 8. TOUCHSCREEN TECHNOLOGIES Resistive touch screen Capacitive touch screen Surface capacitive Projected capacitive Infrared touch screen 86/2/2015
  9. 9. Touchscreen Technology Resistive Touch: • A resistive touchscreen panel comprises several layers, the most important of which are two layers. • One is conductive layer and resistive layer separated by tiny dots called spacers. • An electric current flows between the two layers.
  10. 10. Continued…… Resistive touch screen deliver: • cost-effective • Durable • Consistence performance [ref-3] 6/2/2015 10
  11. 11. CAPACITIVE TOUCH SCREEN • A capacitive touch screen panel is one which consists of an insulator such as glass, coated with a transparent conductor such as Indium tin oxide (ITO). • As the human body is also a conductor, touching the surface of the screen results in a distortion of the screen's electrostatic field, measurable as a change in capacitance. 116/2/2015 [ref-4]
  12. 12. INFRARED TOUCH SCREEN • An infrared touch screen uses a ray of X-Y infrared LED and photodetector pairs around the edges of the screen to detect a disruption in the pattern of LED beams. • These LED beams cross each other in vertical and horizontal patterns. This helps the sensors pick up the exact location of the touch. • A major benefit of such a system is that it can detect essentially any input including a finger, gloved finger, stylus or pen. 126/2/2015 [Ref-wikipedia]
  13. 13. Infrared Touch Screen 6/2/2015 13 [ref-5]
  14. 14. USAGE  Finger stress: With stressing the finger on the desired area of the touch screen, the input is taken by the sensors of the screen.  Finger nail as stylus: With the help of touching the screen with the finger nail which acts as the stylus, input can be taken by the sensors. 146/2/2015
  15. 15. MULTI-TOUCH TECHNOLOGY • On touch screen displays, multi-touch refers to the ability to simultaneously register three or more distinct positions of input touches. 156/2/2015 [ref-Google images]
  16. 16. ADVANTAGES User friendly Fast response Error free input User finger, finger nail, gloved hand, stylus or any soft tip pointer to operate Make computing easy, powerful and fun 166/2/2015
  17. 17. DISADVANTAGES Finger stress: Stress on human fingers when used for more than a few minutes at a time. (for example, ATMs). Fingerprints: Touch screens can suffer from the problem of fingerprints on the display. 176/2/2015
  18. 18. CONCLUSION Though the touch screen technology contains some limitations with it, it is fast, accurate, user friendly and fun to operate .It is being widely accepted. With some modifications, it can completely replace mouse and keyboard completely in the near future. 186/2/2015
  19. 19. REFERENCES [1]“Company history from Elographics to Elo TouchSystems, 1971 - present - Elo TouchSystems - Tyco Electronics”. www.elotouch.com. http://www.elotouch.com/AboutElo/History/default.asp. Accessed 3 March 2010. [2]“The HP-150”. www.columbia.edu. http://www.columbia.edu/acis/history/hp150.html. Accessed 3 March 2010. [3]Hsu, Andrew. "Choosing a touch technology for handheld-system applications." EDN, January 8, 2009: 40-44. [4]Nichols, Steven J. Vaughan “New Interfaces at the Touch of a Fingertip” [5]Izadi, Shahram, et al. "ThinSight: A Thin Form-Factor Interactive Surface Technology." Association for Computing Machinery. IEEE Society August. 2007: 12-15. http://en.wikipedia.org/wiki/touchscreen 6/2/2015 19
  20. 20. 6/2/2015 20

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