11.3.1.4.2-3 Display Jitter

The display should be free of geometric instability or “jitter.”

Additional Information: Jitter is unwanted peak-to-peak variation in the geometric location of pixels over time. The image on the display screen should not jump around or oscillate in any dimension to a degree that the user would notice from the normal range of viewing angles and distances. Jitter should be a maximum of 0.0002 times the design viewing distance in the frequency range from 0.5 Hz to 30 Hz.

Variations in the geometric location of a picture element should be a maximum of 0.0002 mm per mm (0.0002 in. per in.) of viewing distance over a period of 1 second. This may be expressed as

 

VD x 0.0002 >= (H² + V²)0.5,

 

where VD is the viewing distance and H and V are the maximum excursions of picture element centers, horizontally and vertically.0700 For displays viewed from a great distance, over a 1-second period, the movement of an intended stationary picture element should be a maximum of 0.2 milliradians

(41 seconds) of visual angle. See IDMS (2012) for measurement information.5908, 100, 1472G