Capacitive touch screen technology should be used to make use of human body's electric flu. Capacitive touch screen is a four-layer composite glass screen. The inner surface and sandwich of the glass screen are coated with ITO. The outer layer is a thin silica glass protective layer. The sandwich ITO coating acts as the working face. Four electrodes are drawn from four corners. The inner layer ITO is the shielding layer to ensure a good working environment.
In order to achieve multi-touch, capacitive touch screen relies on adding mutual capacitance electrodes. Simply speaking, it divides the screen into blocks and sets up a set of mutual capacitance modules in each area. Therefore, capacitive touch screen can independently detect the touch situation in each area. After processing, it simply realizes multi-touch.
1. Capacitive Touch Screen Operating System and Touch Points
At present, the operating system of capacitive touch screen is WIN7, WIN8 and Android. The touch index depends on the touch IC on the touch screen. For example, in the two types of touch IC used by our company, most of the SIS schemes can achieve 10-Finger touch, and most of the EETI schemes can achieve 10-Finger touch. Other operating systems, such as XP, Linux, Wince and so on, can only achieve single-finger touch because of the limitations of the operating system itself.
2. Drivers of each operating system of capacitive touch screen
At present, the driver-free operating systems are WIN7 and WIN8, plug and play, and other operating systems need to install drivers. Drivers can be roughly divided into two categories. One is. exe executable program, which can directly double-click the installed driver file. This driver is suitable for XP operating system. The other is the need to modify and load driver code files from the bottom of the system for Wince, Linux and Android operating systems, which are relatively complex to install.
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