Different from the traditional single-point touch screen, the most prominent feature of multi-point touch screen is that it can use multiple fingers of two hands even multiplayer control the contents in screen simultaneously, more convenient and user-friendly. Multi-point touch technology also known as multi-touch technology. Multi-touch is divided into two levels in practical applications: one is the master chip can capture multi-point signal simultaneously; the other is able to judge the significance of each way finger touch signal. In other words, is the ability to provide users with gesture recognition. In the products already listed on Apple's iPhone and the MacBook notebook can basically achieve the purpose of this application, but the iPhone is currently only allows two fingers to complete the rotation , zooming and other functions simultaneously, is at best a a double touch, the Microsoft's Surface Computer is even more amazing, and that it can simultaneously generate multiple contacts to reflect. Compared with the small amount of signal lines of 4pin or 5pin in traditional single-point touch screen, the multi-point touch screen, carved out a lot of touch units on the conductive layer, each unit connect to external circuitry through a separate wire. Since all of the touch cell distributed in matrix-shaped row so regardless part of where the user finger access to, the system can react against the corresponding finger movement.
Multi-touch Can Be Divided Into Two Kinds:
Multitouch gestures and Multitouch all point, As our applications in Multitouch gestures, like the rotation, zoom and so on in pictures browse. Multitouch all point such as a game control, gps starting point and end-point control.
The difference between Multi-touch and Normal touch?
Common touch, usually only achieve single-point operation, for the button control, multi-touch can achieve the basic gestures operations, such as parallel move, zoom, rotate, and then by identifying the absolute position of multiple touch points to achieve user-defined gestures operation, more user-friendly operation. There are many factors to consider in design of multi-point touch screen, has a relationship to the number of touch sensor, touch screen controller chip selection, as well as the size of the touch screen, and with the calculation capacitive in touch screen design, touch sensor shape, size, structure, arrangement, the thickness of various materials, the spacing between LCD screen and touch screen, as well as the layout of the. He and finger touch CF related, such as touch-screen surface, the thickness of the thicker protective layer, then the thicker the protective layer is, the worse you touch sensing, also related with the operating position, depending on the touch screen controller chip performance.
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