High integrity touch screen system

A high integrity touch screen system comprising:

• a display screen configured to present information to an operator;
• a first sensor array arranged proximate the display screen, the first sensor array configured to detect a touch by the operator on the display screen and to generate a first set of touch position coordinates;
• a first processor communicatively connected to the first sensor array and to the display screen, the first processor configured to receive the first set of touch position coordinates from the first sensor array and to control the information presented to the operator on the display screen utilizing the first set of touch position coordinates;
• a second sensor array arranged proximate the display screen, the second sensor array configured to detect the touch by the operator on the display screen and to generate a second set of touch position coordinates;
• and
• a second processor communicatively connected to the second sensor array and to the display screen, the second processor configured to receive the second set of touch position coordinates from the second sensor array and to monitor the information presented to the operator on the display screen,
• wherein the first processor and the second processor are communicatively connected to each other, wherein the first processor and the second processor are further configured to cooperate to compare the first set of touch position coordinates with the second set of touch position coordinates and to invalidate the touch when the first set of touch position coordinates and the second set of touch position coordinates do not substantially coincide, and wherein the second processor is still further configured to make a determination that that the information presented to the operator on the display screen is incorrect based on the second set of touch position coordinates and invalidate the touch based on the determination.