What is the touch screen?
The touch screen computer usually has one of several types of touch screens as the primary input device. Some touch screen systems also include keyboard and mice, while others don't. The touch screen monitor can usually detect the presence and location of the finger, nail or special stylus. Tablet computers, mobile phones and video games often use touch screen monitor to enter. Personal digital assistants (PDA), automated banking machines and information kiosks can also use touch screens. This type of screen can detect multiple touches simultaneously, allowing a more complex input. The latched capacity sensors behind the protected glass screen can detect the presence of fingers near any column intersection. It can also detect other conductive objects such as a specially designed stylus or hand palm. Thanks to its multi -capacity it is suitable for drawing, such as manuscript or Asian input.
As computer monitors of touch screen, two other types of capacity displays are also used. The screen is measured separately by the current caused by the presence of a finger near its grid. Like the capacity screen, it can also detect other conductive objects, but can only feel one by one. The surface capacitance screen has a lower resolution and can also detect only one object at a time. Its glass screen has a solid conductive coating on the back that can be used to zoom in.
Resistance technology is also often used in some types of computer monitors of the touch screen. When a finger, nail or stylus presses on a resistance screen, at this point it touches the flexible metal layer of the display. This location can determine the current measurement circuits on the screen. Like most, the types of touch screens, can detect only one touch at a time. Its physical nature of requestis the pressure to register contact and make it more susceptible to damage than other types of touch screens.
Sound waves and light waves are also used to detect and locate touch movements by some screens. The acoustic display transmits on the Ultrasonic Sound Wave screen and measures the reaction. The finger or other directions near the screen absorbs some sound waves and reveals its location to the control circuits. Interrupted light waves can also be used for this purpose. In these displays, they monitor the diodes (LED) and detectors with the corresponding diodes.