This document provides an overview of touchscreen technology. It begins with definitions of touchscreens and their ability to detect touch locations. Next, it discusses the history of touchscreen development from 1971-1983. Benefits of touchscreens are then outlined, such as intuitive use without training. The document proceeds to describe four main touchscreen technologies: resistive, capacitive, infrared, and surface acoustic wave. It explains the construction of a basic touchscreen including the touch sensor, controller, and software driver. Applications are listed in various industries. Disadvantages involve screen size and dirt. The conclusion discusses the growing adoption of touchscreens in devices and their potential to replace mice and keyboards.

1. JORHAT INSTITUTE OF SCIENCE &
TECHNOLOGY
A SEMINAR ON
TOUCHSCREEN TECHNOLOGY
SUBMITTED BY:
BIDYUT BIKASH DAS
ETC-07/09
DEPARTMENT: ELECTRONICS AND

2. INTRODUCTION TO TOUCHSCREEN
TECHNOLOGY
1. A touchscreen is an electronic visual display
which is sensitive to touch or pressure.
2. It detects the presence & location of a touch.
3. It is also the sense of finger, hands or other
passive objects like stylus, light pen etc.
4. Touchscreen provides an alternative user
interface to mouse and keyboard.

3. HISTORY
1.
2.
3.
In 1971, Dr. Sam Hurst first developed touch
sensor named “Elograph” at university of
kentucky.
In 1974 he developed the 1st real
touchscreen.
In 1983 1st touchscreen computer H.P150
reached market.

4. WHY TOUCHSCREEN ?
1.
Enable first-time users to interface with
computers instantly, without any training.
2. Durability is tested over 35 million finger
touches.
3. Eliminate keyboards and mice, which many
novice users find difficult to use.
4. Ensure that no space is wasted since the
input device is completely integrated into the
monitor.

5. touch TECHNOLOGIES
1. Resistive
Resistive
2. Capacitive
capacitive
3. Infrared
infrared
4. Surface Acoustic Wave

6. TECHNOLOGY
RESISTIVE
SAW
IR
CAPACITIVE
DURABILITY
5 Yr.
5 Yr.
3 Yr.
2 Yr.
STABILITY
HIGH
HIGHER
HIGH
OK
TRANSPARENCY
OK
GOOD
GOOD
GOOD
TOUCH
Anything
Finger/
Pen
Anything
Conductive
6

7. CONSTRUCTION
A basic touchscreen has three components.
1. Touch sensor
A touchscreen sensor is a clear glass panel
having a touch responsive surface. The
sensor has generally an electrical current or
signal going through it, touching screen
causes a change to the voltage & current.
This change is used to detect the location of
the touch.

8. 2. Controller
 The controller is a hardware that
connects
between the sensor & the
PC . It takes information from the touch
sensor & translates it into information that
PC can understand.

9. 3. Software driver
The driver is a software update that allows the
touch screen & computer to work together. It
tells the operating system how to interpret the
touch event information that is sent from the
controller.

10. APPLICATIONS
1.
2.
3.
4.
5.
6.
7.
Public Information Displays.
Retail and Restaurant Systems.
Customer Self-services.
Control and Automation Systems.
Computer Based Training.
Assistive Technology.
Casino And Other Gaming System.
And many more….

11. DISADVANTAGES

Screen has to be really big, not to miss things
when
pressing them with your finger.
 Screen
 Most
gets very dirty.
user interfaces are not optimized for thumb
operation, so a stylus is necessary.

12. CONCLUSION
With the growing use of touchscreen, the marginal
cost of touchscreen technology is routinely
absorbed into the products that incorporate it and is
nearly eliminated. Touchscreen now have proven
reliability. Thus, touchscreen displays are found
today in airplanes, automobiles, gaming consoles,
machine control systems, appliances etc.
And now by j ust m f yi ng a l i t t l e, i t can
odi
r epl ace t he m
ouse and key boar d com et el y i n
pl
near f ut ur e.

13. THANK YOU