This document provides a summary of a seminar presentation on touch screen technology. It begins with an introduction to touch screens, noting they allow direct manipulation of what is displayed. It then provides a brief history of touch screen development from 1965 to present. The document discusses how touch screens work and the main components. It describes different types of touch screen technologies including resistive, capacitive, surface acoustic wave, infrared, and optical. It provides details on resistive and capacitive touch screens. The document outlines pros and cons of touch screens as well as applications. It concludes with references used in the presentation.

1. PRESENTED BY -
VIVEK SHARMA
1405232059
B.TECH (E.I.) VI SEM
I.E.T. LUCKNOW
A
SEMINAR ON
PRESENTED TO -
ER. ABHIMANYU
PROF. ELECTRONICS
DEPT.

2. • Introduction
• History
• How touch works
• Types of Touch Technologies
• Pros & Cons
• Applications
• The Future of Touch
• References

3. A touch screen is an electronic visual
display that detect the location and
presence of touch in the display area.
The touchscreen enables the user to
interact directly with what is displayed
instead of a mouse or touchpad.
Touchscreen technology is the direct
manipulation type gesture based
technology.

4. First Touchscreen by E.
A. Johnson
•1965
First resistive
Touchscreen
•1970
HP-150 First touch
computer
•1983
First Touchscreen
phone by BELL
•1992
Apple launches
Message Pad
•1993
Palm top launched
•1998
i Gesture pad
•1999
Portfolio wall
•2001
Smart skin sensing by
SONY
•2002
Multi touch by FTIR
•2006
Microsoft Surface table
•2008
Microsoft & Samsung
SUR-40
•2011
Source: https://arstechnica.com/gadgets/2013/04/from-touch-displays-to-the-surface-a-brief-history-of-

5. • Just move your finger on the screen & it works…!
• The movement of fingers or stylus is sensed by touchscreens &
corresponding operations are performed
• A Touch screen consist of three main components -
• Touch sensor
• Controller
• Software driver

6. Touch
Screen
Resistive
Capacitiv
e
Surface
Acoustic
Infrared
Grid
Optical
imaging
Acoustic
pulse

7. Terms :- ITO : Indium Tin Oxide
PET: Polyethylene
Spacers: to provide support & gap

8. Resistive
Touch
screens
Analog
4 wire
resistiv
e
5 wire
resistiv
e
8 wire
resistiv
e
Digital
Matrix
resistiv
e
touch

9. 4 wire resistive
touch
8 wire resistive
touch
5 wire resistive
touch

10. Digital Matrix resistive
Touch

12. Capacitive
Touch screens
Surface
Capacitive
Projected
Capacitive
Mutual
Capacitance
Self
Capacitance

13. Surface Capacitive

14. Projected Capacitive

15. Slower
NO Multi-Touch
Not as smooth as
Capacitive
Less sensitive
(Pressure on screen is
required to be sensed)
Poor (e.g in sunlight)
Resistance creates a
path
Not Clear, scratches due
Faster
Supports Multi-Touch
Very Smooth
Highly sensitive
(because of capacitance
change phenomenon)
Good
Capacitance Change
Glossy, shinny Scratch
protected
Latest
Response
time
Multi-Touch
Smoothness
Sensitive
Visibility
Technology
Looks

21. FDI RDI

23. • Simple & user friendly
• NO special training required
• Fast access to all digital media
• Errors are eliminated
• Efficient utilization of space
• Multi-touch function available
• Provide sufficient Security
• Interfaces can be updated easily

24. • Not fast process behind the buttons
• Entering large data is tedious task
• Moisture & dust produce problems
• Large displays consume more power
• Expensive than non-touch devices
• Special conductive materials required for touch
• Low precision in case of virtual touch

27. • “The State of the Touch-Screen Panel Market in 2011” by Duke Lee
• “Issues & techniques in touch-sensitive table input” by Buxton W. & Hill R.
• Stone M. D. "Touch-screens for intuitive input”, PC Magazine
• “Comparative study of Various Touchscreens” by Semantics-scholars.org
• “Enhancing touch interaction on Human, Screen, everyday objects” by
Munehiko Sato, Ivan Poupyrev & Chris Harrison
• “A brief history of touch screen” by arstechnia.com
• “How it works :The technology of touchscreens” article by Computerworld.com
• “Touchscreen technologies in brief” dmccoltd.com

28. Questions .. ?