Best price with 100% high qaulity 10.4" visual door phone touch panel
ITO glass+ITO film+tail
Cover glass treatments
Android, Linux, Win CE, Win7,Win8, XP
-10℃ to 60℃, ≤90% RH
-20℃ to 70℃, ≤90% RH
II、What is a four-wire touch screen?
The four-wire touch screen contains two resistive layers.One layer has a vertical bus on the left and right edges of the screen, and the other has a horizontal bus at the bottom and top of the screen, as shown in figure 4.In order to measure in the X axis, the left bus is biased to 0V, and the right bus is biased to VREF.Connect the top or bottom bus to ADC and make a measurement when the top and bottom are in contact.
In order to measure in the Y-axis direction, the top bus is biased to VREF, and the bottom bus is biased to 0V.The ADC input is connected to the left bus or the right bus, and the voltage can be measured when the top layer is in contact with the bottom layer.Figure 5 shows a simplified model of the four-wire touch screen in two layers.For the four-wire touch screen, the ideal connection method is to connect the offset to the positive reference input of the bus ADC of the VREF, and the negative reference input of the bus with the set of 0V to the ADC.