Honeywell International Inc.
Protocol for high integrity personal electronic device applications

Abstract:

A method in a high integrity device for verifying the integrity, continuity, and availability (ICA) of information displayed on an uncertified display is provided. The method comprises creating, on the high integrity device, application data for display on an uncertified display device; transmitting the application data to the uncertified display device; receiving, at the high integrity device from an optical sensing device, a captured image of the display; determining, at the high integrity device, an expected display image to be displayed on the uncertified display device; comparing, at the high integrity device, the captured image of the display to the expected display image; identifying, at the high integrity device, a loss of ICA if one or more frames in the captured image fails the comparison with the expected display image; and causing the annunciation of a message indicating the loss of ICA when a loss of ICA is identified.