This document discusses different types of touch screens and multi-touch technology. It describes resistive and capacitive touch screens, explaining that resistive screens are most common in mobile devices while capacitive screens are used in devices like smartphones and tablets. It also discusses multi-touch technology, how modern operating systems support multiple simultaneous touch points, and new tactile touch screen technologies like Tactus that add haptic feedback.

1. SULTAN QABOOS UNIVERSITY
COLLEGE OF ENGINEERING
DEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING

2. 1- Introduction
2- Touch Screen Benefits
3- Touch Screen Types
4- Multi- touch screen
5- Tactus Technology
6- Summary

3. What is touch screen ??
A touch screen is an electronic visual display
capable of ‘detecting’ and effectively ‘locating’ a
touch over its display area. It is sensitive to the
touch of a human finger, hand, pointed finger
nail and passive objects like stylus.

4. 1- a fast and intuitive interface for users and
simplify customer interactions.
2- Users do not have to know how to use a
computer and can simply touch the display to
make selections.
3- No keyboard is required, saving valuable
space.
TOUCH SCREEN BENEFITS

5. 1- resistive touch screen
2- Capacitive screens :
-Projected Capacitive Touch Screen
- Surface Capacitive Touch Screen
TYPES OF TOUCH SCREENS

6. - Most common type of touch screen
technology in today’s market.
- Used in many applications, such as cell
phones, handheld games, GPS navigation
devices, and even some digital cameras .
RESISTIVE TOUCH SCREEN

7. - Built using two layers of the conductive
material Indium Tin Oxide (ITO).
- A typical resistive touch screen uses 4 wires,
2 of them on each panel.
How does it operate ??

8.  In the early 1990s, this technology made its
initial appearance into the touch screen market
in laptop computers.
 In 2001, it began appearing in consumer
devices, such as MP3-players and smart
phones.
 The popularity of Apple products using this
technology: iPod Touch, iPhone and most
recently the iPad.
Capacitive TOUCH SCREEN

9. -It work using a sheet of glass that's coated on
the inside with horizontal and vertical
electrodes made of a conductive material.
How does it work ??

10.  Advantages :
Faster
More responsive than resistive
touch screens.
 Disadvantages:
More expensive.
Offer a lesser degree of accuracy
Cannot be used with gloves.

11. Projected Capacitive
Touch Screen

12. Surface Capacitive Touch
Screen

13. Resistive:
 Most widely used type of screens in
mobile phones.
lifespan of about 35 million touches.
Capacitive:
 More expensive than resistive screens.
lifespan of about 225 million touches.
Mobile TOUCH SCREEN Types

14. Multi- Touch

15. -Defined as the ability to recognize two or
more simultaneous touch points.
- It was invented in 1982 at the University of
Toronto.
Multi- touch

16. - Windows 7 & Windows 8 both support
multi-touch .
- Android, iOS and Linux currently support
~5 touches

17. Capable of decoding multiple streams of
moving points and taking actions in response.
Capable of forwarding multiple streams of
moving points (and acting on a defined subset
of them).
Capable of delivering sets of simultaneous
points to the OS.
Capable of sensing multiple simultaneous
points.
Multi-Touch Architecture

18. -Is the developer of a new tactile user interface
for touch-screen devices.
-Tactus provides a new dimension of user
interface with a fundamentally unique solution
Tactus Technology

19. SUMMARY
Touch screen benefits.
Types of touch screens and how do they
work.
Multi touch screen.
New technology (Tactus Technology)

20. http://www.engineersgarage.com/articles/touchs
creen-technology-working
http://www.planar.com/innovations/touch-technology/
http://www.tactustechnology.com/technology.html
REFRENCES