The two-layer transparent metal layer of the four-wire resistance analogue technology operates with a constant voltage of 5V on each layer: one vertically and one horizontally. A total of four cables are required. High-resolution, high-speed transmission response. Surface hardness treatment to reduce abrasions, scratches and chemical resistance. It has a smooth and matte finish. One proofreading, high stability, never drifting.
The bottom layer of the five-wire resistance technology contact screen adds the voltage field in both directions to the conductive working surface of the glass through the precision resistance network, we can briefly understand that the voltage field in both directions is added to the same working surface, and the outer nickel gold conductive layer is only used as a pure conductor, and the position of the contact point is measured by the method of time-sharing detection of the X-axis and Y-axis voltage value of the inner ITO contact point after contact. The inner ITO of the five-wire resistive contact screen needs four leads, and the outer layer is only a conductor, and there are a total of 5 lead wires for the contact screen. High resolution, high-speed transmission response. High surface hardness, reduced abrasions, scratches and chemical resistance. 30 million times of contact at the same point can still be used. Conductive glass is the medium of the base material. One proofreading, high stability, never drifting. Five-wire resistive contact screens have the disadvantages of high price and high environmental requirements. The outer conductive layer of the five-wire resistive contact screen uses nickel-gold coating materials with good ductility, and the outer conductive layer uses nickel-gold materials with good ductility due to frequent contact, and the purpose of using nickel-gold materials with good ductility is to prolong the service life, but the process cost is relatively high. Although the nickel-gold conductive layer has good ductility, it can only be used as a transparent conductor, and is not suitable as the working surface of the resistive contact screen, because it has high conductivity, and the metal is not easy to achieve a very uniform thickness, so it is not suitable for the voltage dispersion layer, and can only be used as a probing layer.
Whether it is a four-wire resistance contact screen or a five-wire resistance contact screen, they are a kind of working environment that is completely blocked from the outside world, not afraid of dust and water vapor, it can be used to contact with any object, can be used to write and paint, and is more suitable for the use of limited people in the field of industrial control and the office. The disadvantage of the resistive contact screen is that the outer layer of the composite film is made of plastic materials, and people who don't know it use too much force or use sharp tools to contact or scratch the entire contact screen, resulting in scrapping. However, within the limit, the scratch will only injure the outer conductive layer, and the scratch of the outer conductive layer is not related to the five-wire resistive contact screen, but is fatal to the four-wire resistive contact screen. The accuracy of the resistor contact screen only depends on the accuracy of A/D conversion, so it can easily reach 4096*4096 · In comparison, the five-wire resistance is superior to the four-wire resistance in ensuring resolution accuracy, but the cost is large, so the price is relatively high.
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