A touch screen consists of a touch sensor panel, a controller, and driver software. The sensor panel, usually made of glass, detects touch input via changes in electrical current or signal. The controller connects the sensor to the computer and determines the interface. Driver software allows the touch screen and computer to communicate, usually emulating a mouse. Common touch screen technologies include resistive, capacitive, surface acoustic wave, and infrared. Touch screens are widely used for interfaces like ATMs, kiosks and games as they allow direct input without keyboards.

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2. INTRODUCTION TO THE TECHNOLOGY
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6. 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
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7. 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
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8. 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.
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9. Diagram showing How it Works
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10. * Resistive Touch Screen
* Capacitive Touch Screen
* Surface Acoustic Wave Touchscreen
* Infrared Touch Screen
Types of Touch Screen Technologies:
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11. Resistive Touch Screen
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12. Capacitive Touch Screen
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13. Surface Acoustic Wave Touchscreen
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14. Infrared Touch Screen
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15. 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.
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16. 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
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
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17. 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
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