IEI Technology iSignager 500A, User Manual

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iSignager 500A
Page 34
Progressive scan differs from interlaced scan in that the image is displayed on a screen by
scanning each line (or row of pixels) in a sequential order rather than an alternate order.
Therefore, in progressive scan, the image lines are scanned in numerical order (1, 2, 3)
down the screen from top to bottom, instead of in an alternate order (lines or rows 1, 3, 5,
etc. followed by lines or rows 2, 4, 6). By progressively scanning the image onto a
screen every 60th of a second rather than "interlacing" alternate lines every 30th of a
second.