Avoid causing the screen to flicker with a frequency greater than 2 Hz and less than 55 Hz.
Displays which flicker or flash can cause epileptic seizures in susceptible individuals, particularly if the flash has a high intensity and is within certain frequency ranges. This includes flashing text, turning graphics on and off or repeatedly changing between different images on the screen.
The following technique is the minimum required to meet Checkpoint 5.2 from the IBM Hardware Self Contained, Closed Products Accessibility Checklist:
Do not have the screen flicker with a frequency between 2 Hz and 55 Hz.
The technique above is required; the following techniques are recommended to enhance accessibility:
Test the hardware to ensure that it complies with accessibility requirements.
Software test cases are needed to test this checkpoint.
|1.||Verify, through code inspection, that there is no flicker with a frequency greater than 2 Hz or less than 55 Hz.||
©2009 IBM Corporation
Last updated September 01, 2009.