A touchscreen is a computing device that combines the features of a display screen (monitor) and those of a pointing device like mouse or touchpad.
This reduces the number of devices on some systems and makes software ergonomics very well adapted to certain functions. Touch screens are used, for example, for the PDA, the GPS, and MP3 players, smartphones, the Nintendo DS, the ticketing machines, all cases without cashier and computers.
A touch screen may be sensitive to more than two pressure levels with a resolution better (hybrid screen / stylus) and more than one place at a time ( multitouch / fingers)
According to the technology used, there are two types of touch screens:
- Resistive: They are cheaper and are unaffected by dust or water, and can also be used with a stylus or finger. Yet they lose up to 25% brightness.
- Capacitive: The picture quality is better, are much more accurate and allow the use of several fingers at once ( multitouch ). However, they are more expensive and can not be used with normal pointer, but with special capacitive screens.
Advantages of Touch Screen
- Simplicity of the interface.
- The unit can be combined with small and big screen.
- Quick set in tranquil surroundings.
- Seriously expanded multimedia device.
Disadvantages of Touch Screen
- There is no tactile feedback
- High power consumption.
- Extremely fine model screens even with a slight risk of being damaged, cracked or even broken.
- Do not frost.
