I understand that this problem can be solved by software. Because the information of the tactile sensor is obtained by electrical differences on the capacitive screen, when any inside area of the screen is touched or when the area enclosed by the sensors are touched too. Sometimes the sensors are placed outside the visual area of the screen . This is a multi -touch screen to ten simultaneous touches. Is possible that the interpretation of the electrical variations is not recognized correctly by the software and the aluminum frame can create some interferences to the touch sensors. If so , this can also be corrected by ignoring some information from some screen positions or correcting the algorithm of interpretation of the electrical variations data. It should be a design error too large for this can not be correct , since touch screens are tested under many conditions and environments of use . So I think it is not a malfunction of the touch screen, but are a poor calibration or a bad algorithm.
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