ITO film is the most important part of the capacitive touch panel, and it is the most important part of the capacitive touch panel. p>
ITO film is made in the ITO material in the PET film on the conductive film, and senser is the sensor of the general term, also includes ITO film. ITO sensor in the capacitive screen structure is equivalent to the function of the sheet, the structure of the projected capacitive screen is G + G . ITO glass + glass cover,
Projective Capacitive Touchscreen
Projective capacitive touch screen but has a multi-finger touch screen. capacitive touch screen has the function of multi-finger touch. Both capacitive touch screen has high light transmission, fast response time, long life and other advantages, the disadvantage is: with the temperature, humidity changes, the capacitance value will change, resulting in poor stability, often drift phenomenon, the need for frequent calibration of the screen, and can not wear ordinary gloves for touch positioning.
Projected capacitive screen can be divided into two types of self-capacitive screen and mutual capacitive screen, the more common mutual capacitive screen, for example, the internal drive electrode and receiving electrode, the drive electrode sends out a low-voltage high-frequency signals to the receiving electrode projected to the formation of a stable current when the human body in contact with the capacitive screen, due to the human body grounded, the finger and the capacitive screen on the formation of an equivalent capacitance, and high-frequency signals can be passed through the equivalent capacitance flow into the ground. The capacitance flows into the ground, so that the charge received by the receiving end decreases, and when the finger is closer to the transmitting end, the charge decreases more obviously, and finally according to the current strength received by the receiving end to determine the point of contact
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