Capacitive Touch Charge Transfer Lateral Mode Technology 2

In the simplest four wire resistive connection, two electrodes are connected to each end of the top layer and the bottom layer, and the electrodes of the two layers intersect at a 90 degree angle to form a four wire star shaped connection structure. This is actually a pair of potentiometers that are orthogonal to each other (Figure 2), similar to a flat screen simulation of a mechanical joystick. In order to measure the touch position in the X-axis direction, the controller of the touchpad sets X - to ground and X+bias as the reference voltage, and then reads the voltage from both ends of the Y layer to find the contac t points of the two layers on the X-axis. Similarly, the controller can determine the touch position on the Y-axis by loading a driving voltage on the electrodes of the Y layer and reading the touch point voltage from the X layer. diode

The variations of this technology include a five wire system, with a substrate coated with ITO and electrodes on all four sides. The soft diaphragm is the fifth electrode, and when the user presses with their finger, the controller can measure the voltage on the X and Y axes to determine the location of the touch. This arrangement typically provides better stability and longer lifespan than a four wire structure. Other changes include six line and eight line systems that are suitable for large screens and have higher resolutions.  diode