Concept of multi-touch technology

Multi-touch (MultiTouch) technology means that allow a user to control more than one finger at the same time by the graphical interface of a technology. With multi-touch technology corresponds to a single touch, single-touch device has a lot of years, and the small size of a touch-phones, TFT LCD Displays the most common is the large size of the bank's ATM machine and queuing kiosk.
Multi-touch display devices using advanced computer vision techniques to obtain and identify human finger position on the display screen, and by calculating a finger on the display screen is converted to physical coordinates of the logical coordinate of the computer screen and control instructions. To achieve with your fingers or other natural objects on the display screen of the touch options, open interface, convert images, information and other control functions.
From touch points up points, two points touch (more suitable for a user, and now also put on the market two touch normalized to the ranks of multi-touch), true multi-touch (for multiple users). Up points from the device size, a small size of individual multi-touch device, also has a large size for multi-touch devices people. Usually 20 inches as personal devices and multiplayer equipment demarcation point, apparently too many people use the equipment up is not easy.
A computer should be arithmetic unit, memory, controller, input - output devices. Conventional computer input devices are the keyboard and mouse, the output device is a display,20x4 lcd display and multi-touch computers and traditional computers is that it differs from the input and output are all concentrated to the monitor, you enter the command on the monitor while the computer will The results reflected in the display. In the prior art, the multi-touch technology used in display devices are LCD, rear projection displays. Such as holographic display devices like sci-fi movies and still remain in the scientist's laboratory.