Cover glass 3mm
ITO glass 1.1mm
Flexible flat cable 0.3±0.03mm
Finger or conductive pen
≥6H 7H 9H options
IIC USB RS233
2、5、10 Touch points,others options
DC 1.8 V, 2.8V, 3.2V,5V options
＞20MΩ At DC 25V
＞85% >90% options
II、Capacitive screen manufacturer explains the principle of capacitive screen.
Capacitive touch screen technology USES the human body's current induction to work. Capacitive touch screen is a four layer composite glass screen, the inner surface of the glass and laminated coated with a layer of ITO, the outermost layer is a thin layer of silica glass coating, laminated ITO coating as the working face, four corners raises four electrodes, inner ITO for shield to ensure good working environment.
When the fingers on the metal layer, the electric field due to the human body, the capacitance screen manufacturers users and touch screen surface formed by a coupling capacitance, for high frequency current, capacitance is directly conductor, so the fingers from the point of contact suck a small current. The current issue from the touch screen on the four corners of the electrode respectively, the four electrodes and the current is proportional to the finger to the four corners, the controller based on the four current ratio of precise calculation, it is concluded that the location of the touch point.
Capacitive touch to achieve multi-touch, rely on is to increase the mutual capacitance electrode, capacitance screen manufacturers, in a nutshell, is to screen block, in every region set up a set of mutual capacitance modules are independent, so the capacitance screen can detect a touch of the regional independence, after processing, simply realize multi-touch.