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JORHAT INSTITUTE OF SCIENCE &
A SEMINAR ON
BIDYUT BIKASH DAS
DEPARTMENT: ELECTRONICS AND
INTRODUCTION TO TOUCHSCREEN
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.
In 1971, Dr. Sam Hurst first developed touch
sensor named “Elograph” at university of
In 1974 he developed the 1st real
In 1983 1st touchscreen computer H.P150
WHY TOUCHSCREEN ?
Enable first-time users to interface with
computers instantly, without any training.
2. Durability is tested over 35 million finger
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
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 controller is a hardware that
between the sensor & the
PC . It takes information from the touch
sensor & translates it into information that
PC can understand.
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
Public Information Displays.
Retail and Restaurant Systems.
Control and Automation Systems.
Computer Based Training.
Casino And Other Gaming System.
And many more….
Screen has to be really big, not to miss things
pressing them with your finger.
gets very dirty.
user interfaces are not optimized for thumb
operation, so a stylus is necessary.
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
r epl ace t he m
ouse and key boar d com et el y i n
near f ut ur e.