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| TOUCH SCREEN |
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| A Touch Screen is a display that can detect the presence and location of a touch within the display area. The term generally refers to touch or contact to the display of the device by a finger or hand, it enables one to interact with what is displayed directly on the screen, where it is displayed, rather than indirectly with a mouse or touchpad. |
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| # Touchscreen Pros : |
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1. Direct: Direct pointing to objects, direct relationship between hand and cursor movement (distance, speed and direction),
because the hand is moving on the same surface that the cursor is moving, manipulating objects on the screen is similar to
manipulating them in the manual world |
| 2. Fast (but less precise without pen) |
| 3. Finger is usable, any pen is usable (usually no cable needed). |
| 4. No keyboard necessary for applications that need menu selections only -> saves desk space |
| 5. Suited to: novices, applications for information retrieval, high-use environments. |
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| # Touchscreen Cons : |
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1. Low precision (finger): Imprecise positioning, possible problems with eye parallaxis (with pen, too), the finger may be too
large for accurate pointing with small objects -> a pen is more accurate. |
2. Hand movements (if used with keyboard): Requires that users move the hand away from the keyboard; a stylus requires
also hand movements to take up the pen. |
| 3. Fatigue: Straining the arm muscles under heavy use (especially if the screen is placed vertically). |
| 4. Sitting/Standing position: The user has to sit/stand close to the screen. |
| 5. Dirt: The screen gets dirty from finger prints. |
| 6. Screen coverage: The user's hand, the finger or the pen may obscure parts of the screen. |
7. Activation: Usually direct activation of the selected function, when the screen is touched; there is no special "activation"
button as with a light pen or a mouse. |
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| # Use of touch screen application : |
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1. User friendly.
2. Fast response.
3. Error free input.
4. Run any mouse-driven program.
5. Easy to install.
6. Plug and play driver loading.
7. Use finger, fingernail, gloved hand, stylus or any soft-tip pointer to operate.
8. Stylus and cleaning cloth included.
9. Easy to clean and maintain.
10. Compatible with Windows, Macintosh and Linux.
11. No external power supply - can be used anywhere in the world.
12. Life time free tech support.
13. Life time free driver upgrade.
14. Reduce monitor radiation.
15. Eliminate monitor static.
16. Does not interfere mouse and keyboard function.
17. Make computing easy, powerful and fun. |
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| # Some Example of touch Screen application : |
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1. Public information systems: Museums, city guides
2. Interactive Computer Games
3. Auto Navigation Systems
4. Hospital and hotel directories (check-in, registration)
5. Banks and Financial Reporting
6. Bank cash advance and teller machines
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