Interlacing
To prevent the appearance of visual flicker at refresh rates below 60 images/s,
the display can be interlaced as described in Section 2.3. Standard interlace
for video systems is 2:1. Since interlacing is not necessary at refresh rates
above 60 images/s, an interlace of 1:1 is used with such systems. In other
words, lines are drawn in an ordinary sequential fashion: 1,2,3,4,...,N.