Functional safety display controller

An apparatus comprising:

• a display device, configured to raster scan a series of pixel intensity data, the raster scan comprising at least one synchronization phase;
• a system controller configured to define a visible display area of the display device and a test area of the display device, wherein the test area is mutually exclusive of the display area;
• a display controller configured to render a test data in the test area to generate a rendered test data;
• and
• a checksum generator configured to generate a checksum of the rendered test data, wherein the system controller compares the checksum with a previously generated checksum to verify a functionality of the display controller.

A method for controlling a functional safety display controller comprising:

• defining a visible display area of a display device, wherein the display device is controlled by a raster scan comprising at least one synchronization phase;
• defining a test area of the display device;
• rendering a test data in the test area to generate a rendered test data during the at least one synchronization phase of the raster scan, the test data generated by a Pseudo Random Number Generator (PRNG);
• generating a checksum of the rendered test data;
• and
• comparing the checksum with a previously generated checksum.