Touchscreen Technology Choices


ProductVarTech Optical Imaging for Large Screen LCDsCapacitiveSAWInfraredResistive
TechnologyOptical imagingElectrostatic fieldSound wavesLight interruptionResistive
ActivationZero activation force requiredLow activation pressure requiredLow activation pressure requiredZero activation force requiredLow activation pressure required
Transmissivity / opticsVery good > 92%Very good > 92%Very good > 92%Very good > 92%< 82%, some distortion to graphics due to coatings
Drag and dropHigh resolution, draws smooth linesRequires constant pressure to draw smooth linesRequires constant pressure to draw smooth linesLow resolution due to spacing of IR sensors and interpolationRequires constant pressure to draw smooth lines
CalibrationNo driftRequires periodic recalibrationRequires periodic recalibrationNo driftRequires periodic recalibration due to wearing of coatings