touch screen technology report and ppt

[seminar class]

Submitted by
Juned shaikh
Salahuddin shaikh

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TOUCH SCREEN TECHNOLOGY
Introduction
Definition:-
“ A computer display screen ,sensitive to human touch, allowing user to interact with computer by touching on screen” .
* works instantly with all programs like mouse .
* touch event is registered when finger touches screen .
* components making a complete touch system :-
1. A touch sensor .
2. A controller .
3. A s/w driver .
How does a touch screen works ?
1. A touch sensor -
* a glass panel with touch responsive surface .
* covers whole viewable area .
* touching the screen causes voltage change ,
input for controller .
2. A controller -
* interface between sensor & PC .
* converts voltage change into digital signal .
* type of interface required
3. A s/w driver -
* touch screen & PC works together .
* converts touch events into mouse events .
Types of touch screens
3 major types-

1. Resistive touch screens
2. Capacitive touch screens
3. Surface acoustic wave
Comparison of different touch screens
System requirements
O . S . : Ms Dos version 5.0+windows 3.0,
windows ME/2000/XP/7/Linux
Processor: 386 PC compatible or higher
Disk : 2MB of free space hard disk , 3.5”(1.44MB)
floppy drive
Memory : 14kb resident memory
K/B : Not required after installation
Video : ½ MB SVGA or higher
Ports : RS 232, mouse port or USB(depends on type)
Touch screen strengths
• Convenience of push button control
• Easy enough for a child to use
• All output and inputs are done through one device
• 3-5 times faster than a speeding mouse
• No dragging mouse to each starting point
• More intuitive than other input devices Lasts (2-5 times)
longer than a mouse.
• Low maintenance.
• No training needed (push button control)