JORHAT INSTITUTE OF SCIENCE & TECHNOLOGY

A SEMINAR ONTOUCHSCREEN TECHNOLOGY

SUBMITTED BY:

BIDYUT BIKASH DAS

ETC-07/09

DEPARTMENT: ELECTRONICS AND TELECOMMUNICATION

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.

HISTORY1. In 1971, Dr. Sam Hurst first developed

touch sensor named “Elograph” at university of kentucky.

2. In 1974 he developed the 1st real touchscreen.

3. In 1983 1st touchscreen computer H.P150 reached market.

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.

touch TECHNOLOGIES

1. Resistive 2. Capacitive

3. Infrared

4. Surface Acoustic Wave

Resistive

capacitive

infrared

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

Comparison

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.

2. ControllerThe 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.

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.

APPLICATIONS

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

more….

DISADVANTAGES

Screen has to be really big, not to miss things when

pressing them with your finger.

Screen gets very dirty.

Most user interfaces are not optimized for thumb

operation, so a stylus is necessary.

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 just modifying a little, it can replace the mouse and key board completely in near future. 

THANK YOU