Touch screen system

A touch screen system, comprising:

• a single electrically non-conductive substrate including polyethylene terephthalate, the substrate having a first side and a second, opposing side;
• an electrically conductive coating including PEDOT disposed upon each of the first and second sides of the substrate, the coatings forming a predetermined grid pattern of rows and columns, the rows and columns each oriented generally orthogonally with respect to one another;
• and
• a controller disposed on the substrate, the controller having a touch switch interface and at least one output, the touch switch interface being electrically coupled to the pads,
• the controller generating an AC signal, the AC signal being electrically coupled from the controller to the pads through the touch switch interface, thereby generating an electrostatic field proximate the pads,
• the controller being configured to detect at the touch switch interface a change in the electrostatic field resulting from an actuating member placed in proximity to at least one of the pads, and
• the controller further configured to include a function to increase the signal-to-noise ratio of the touch screen system in response to the detected electrostatic field;
• the controller providing at the output a signal corresponding to the change in the electrostatic field.

A method for forming a touch screen system, comprising the steps of:

• obtaining a single electrically non-conductive substrate having a first and a second, opposing side;
• disposing at least one electrically conductive pad upon each of the first and second sides of the substrate and orienting the pads generally orthogonally with respect to one another, the pads including poly 3,4-ethylenedioxythiophene material;
• and
• obtaining a controller having a touch switch interface and at least one output;
• electrically coupling the touch switch interface to the pads;
• the controller generating an AC signal, the AC signal being electrically coupled from the controller to the pads through the touch switch interface, thereby generating an electrostatic field proximate the pads,
• the controller being configured to detect at the touch switch interface a change in the electrostatic field resulting from an actuating member placed in proximity to at least one of the pads, and
• the controller further configured to include a function to increase the signal-to-noise ratio of the touch screen system in response to the detected electrostatic field;
• obtaining a signal from the controller at the output, the signal corresponding to the change in the electrostatic field.