Capactive Touch Panel
Capacitive touch screen structure is mainly in the glass screen coated with a layer of transparent film conductor layer, and then in the conductor layer plus a protective glass, double glass design can completely protect the conductor layer and the sensor.
Capacitive touch screen in the touch screen are coated with long and narrow sides of the electrode, in the conductor to form a low voltage AC electric field. In touching the screen, due to the human body electric field, between the finger and the conductor layer will form a coupling capacitor, the four sides of the electrode current will flow to the contact, and the current strength and the finger to the electrode is proportional to the distance, after the touch screen controller Will calculate the proportion of current and strength, accurate calculation of the location of the touch point.
Capacitive touch screen dual glass not only protects the conductor and the sensor, more effectively prevent the external environment factors affect the touch screen, even if the screen stained with dirt, dust or grease, capacitive touch screen can still accurately calculate the touch position.
Capacitive touch screen is in the glass surface affixed to a layer of transparent special metal conductive material. When the finger touches the metal layer, the capacitance of the contact changes so that the frequency of the oscillator connected to it changes, and the touch position information can be determined by measuring the frequency change. As the capacitance with temperature, humidity or ground conditions vary, so the stability is poor, often produce drift phenomenon.