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Calibration in touchscreen systems

Posted: 20 Sep 2007 ?? ?Print Version ?Bookmark and Share

Keywords:surface-mount SO-28? calibration? touchscreen systems? touch panels?

Today, more and more different fields are adopting touchscreens or touch panels for applications with human/machinery or human/computer interfaces.

Products or instrumentation equipped with a touch screen normally require a calibration routine upon power up because it is difficult to perfectly align a touch screen?s coordinates with those of the display underneath it. Calibration is necessary when the coordinates of the area touched on the screen are not sufficiently close to the coordinates on the display. Without proper calibration, software may not respond correctly when a soft button or icon is pressed.

This article presents concepts and methods for the calibration of touch-screen systems. Software-programming algorithms and their implementation are also discussed.

Please view the PDF document for more information.

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