 4 wire analog Touch Panel
Acting theory：
The construction of general analog inductive entering device is structured by analog film of top and bottom layers (diagram一)that means it is formed by X layer, Y layer and one piece of controlling circuit board, on the X layer analog film, there is a pair of electrode connected by analog film spreading alongside the direction of X axis, that is X+ and X- electrode separated at the sides of X layer analog film, on the Y layer analog film, there is a electrode connected by analog film spreading alongside the direction of Y axis, that is Y+ and Y- electrode separated at the sides of Y layer analog film, adding fixed voltage at one side of electrode on the two layers of analog film, touching any point at the appearance of two layers of analog film, measuring through electrode at another side without electrification and getting a voltage value from two pieces of analog film be touched, then can get X and Y coordinate of touching point.
No limited to touching medium because it induces by pressure, it can be operated no matter with hand、pencil，credit card, stick...etc. that also can work even though wearing glove.
Application：
The main environment must be in no limited to touching medium or wearing glove, for example: surgical table monitor, automatic ordering system, PDA, electric dictionary, cell phone, logistics system, stock system...etc.
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 5 wire analog Touch Panel
Acting theory:
Adding a even electric field at four endpoints, RT, RB, LT, LB to make the ITO glass of the bottom spread a even voltage, the top layer is signal-receiving device, when pen or finger touch any point of appearance, the controller detects that the electrode changes and then switches coordinate.
No limited to touching medium because it induces by pressure, it can be operated no matter with hand, pencil, credit card, stick...etc. that also can work even though wearing glove.
Application:
The main environment must be in no limited to touching medium, bad environment or high touching frequency, for example: POS system, industrial control, automatic ordering system, traveling guide system...etc.
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