Comment Re:Seizure disorder (Score 3, Insightful) 532
The cycle rate for triggering seizures isn't typically that high. Most LED backlights cycle at 120hz (they should be driven ). Older LCD flatscreens had crappy tubes and had a very visible flicker.
http://en.wikipedia.org/wiki/Photosensitive_epilepsy
When functioning correctly, mains-powered fluorescent lighting has a flicker rate sufficiently high (twice the mains frequency, typically 100 Hz or 120 Hz) to reduce the occurrence of problems. However, a faulty fluorescent lamp can flicker at a much lower rate and trigger seizures.[4] Newer high-efficiency compact fluorescent lamps (CFL) with electronic ballast circuits operate at much higher frequencies (10–20 kHz) not normally perceivable by the human eye, though defective lights can still cause problems.