Touch screens work by detecting changes in electrical signals or voltages when a user touches the screen. A touch sensor panel sits over the display and a controller connects the sensor to the computer. The controller determines the interface and a driver allows the computer and touch screen to work together. There are different types of touch screen technologies including resistive, capacitive, surface acoustic wave, and infrared. Touch screens are commonly used for public displays, self-service kiosks, and digital devices. While they provide a direct and intuitive interface, touch screens can have lower precision than other input methods. However, their user-friendly nature has led to widespread adoption.

3. INTRODUCTION TO THE
TECHNOLOGY

7. A touch screen sensor is a clear glass panel with a touch responsive surface
The sensor generally has an electrical current or signal going through it
and touching the screen causes a voltage or signal change

8. The controller is a small PC card that connects between the touch sensor and
the PC
The controller determines what type of interface/connection you will need on
the PC

9. The driver is a software that allows the touch screen and computer to work
together
Most touch screen drivers today are a mouse-emulation type driver.

10. Diagram showing How it Works

11. Types of Touch Screen
Technologies:
* Resistive Touch Screen
* Capacitive Touch Screen
* Surface Acoustic Wave Touchscreen
* Infrared Touch Screen

12. Resistive Touch Screen

13. Capacitive Touch Screen

14. Surface Acoustic Wave Touchscreen

15. Infrared Touch Screen

16. Public Information Displays:::
Tourism displays, Trade show display
Customer Self-Services:::
Stores, Restaurants, ATMs, Airline ticket terminals
and Transportation hubs.
More uses...
Digital jukeboxes, Computerized gaming, Student
Registration systems, Multimedia software ,
Scientific applications etc.

17. Pros
Direct pointing to the
objects.
Fast
Finger or pen is usable (No
cable required)
No keyboard necessary
Suited to: novices,
application for information
retrieval etc
&
Cons
Low precision by using
finger
User has to sit or stand
closer to the screen
The screen may be covered
more by using hand
No direct activation to the
selected function

18. Though the touch screen technology contains some limitations it’s
very user friendly, fast, accurate, easy for the novices & fun to
operate. It has been widely accepted. And now by just modifying a
little it can replace the mouse and key board completely in near
future