Newhaven Products > TFTs

NHD 5.0 800480 resistive touch screen non-linearity

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dfansler:
I have a problem with the resistive touch display on the above display.  On the right end of the display, if I am measuring the resistance from top to bottom, it changes by 300 ohms (increasing from top to bottom).  Reading the horizontal position on the right edge should give the same value from top to bottom - instead the value increases.  This means that if I scale the value to be 800 on the right side, it will go from say 800 at the top to 850 at the bottom.

Is there a problem with the touch screen, or my logic?
Kind regards,
David

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