5 wire touch screen
The five-wire touchscreen uses a resistive layer and a conductive layer. The conductive layer has a contact, usually on its side of the edge. The four corners of the resistive layer each have a contact. To measure in the X-axis direction, bias the upper and lower left corners to VREF, and the upper right and lower right corners.Because the left and right angles are the same voltage, the effect is similar to the bus on the left and right sides of the connection, similar to the method used in the four-wire touch screen. In order to measure in the Y-axis direction, the upper left and upper right are offset to VREF, and the lower left and lower right are offset to 0V. Since the upper and lower corners are the same voltage, the effect is approximately the same as the bus connecting the top and bottom edges, similar to the one used in the four-wire touch screen. The advantage of this measurement algorithm is that it keeps the voltage in the upper left and lower right corners unchanged; but if the grid coordinates are used, the X and Y axes need to be reversed. For a five-wire touchscreen, the best way to connect is to connect the upper left corner (offset to VREF) to the positive reference input of the ADC and the lower left corner (offset to 0V) to the negative reference input of the ADC.
Big Size 5 wire touch screen from size 10.2"" to 22"+Controller
|CONTACT FOR SPEC||P/N||size||thickness||outside dimension||view area dimension||active area dimension||Note|