touch screen technology

2. ROLL # 2013-B.SC-40
M. IBRAR YOUNAS

3. TOUCHSCREENTECHNOLOGY

4. OVERVIEW
Introduction
Components
& Its Working
Technologies
Pros & Cons
Applications
Conclusion

5. INTRODUCTION
 A touch screen is an
input device that
allows a user to
operate a pc(device) by
simply touching the
display screen.
 Which has a sensitive
glass overlay placed on
it.

6. COMPONENTS&ITSWORKING:
THE BASIC COMPONENTS
OF TOUCH SCREEN:
TOUCH SENSOR
CONTROLER
SOFTWARE DRIVER

7. A touch sensor is a clear glass panel with a touch
responsive surface.
The sensor generally has an electric current or signal
going through it.
Voltage change determines the point of touch.
TOUCH SENSOR:

8. The controller is small pc card that connects between
the touch sensor and pc.
 It takes information from the touch sensor and
translate into information that pc can understand.
CONTROLLER

9. SOFTWARE DRIVER
 The driver is a software
that allows the touch
screen and computer to
work together.
 It tells the operating
system how to interpret
the touch event
information that sent
from the controller.
 Most of the touch screen
drivers today are
emulation type driver.

10. HOW IT WORKS….????

11. TECHNOLOGIES
RESISTIVE
CAPACITIVE
INFRARED

12. RESISTIVE
 The resistive touch screen uses a glass panel
with a uniform conductive ITO(IndiumTin
Oxide) coating on the side surface.
 A PET film is a tightly suspended over the ITO
coating surface of a glass panel.

13. •When the screen is touched,
it pushes the conductive ITO
coating on the PET film.That
results the electrical contact,
producing the voltages. It
presents the position
touched.
• Resistive touch screen deliver
cost-effective, consistent and
durable performance

14. It consists of a glass panel with a
capacitive (charge storing) material
coating its surface.
Touching the surface of the screen
results in a distortion of the screen’s
electrostatic field, measurable as a
change in the capacitance.
Capacitive

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.
These LED beams cross each
other in vertical and horizontal
patterns. This helps the sensors
pick up the exact location of
the touch.

17. 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
PROS

18. 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
CONS

20. CONCLUSION
Though the touch screen technology contains some
limitations it’s very user friendly, fast, accurate, & fun to
operate. It has been widely accepted. And now by just
modifying a little it can replace the mouse and key board
completely in near future

21. ANY QUESTION…..????
BUT I CAN’T HEAR…