a bright spot on an otherwise dark screen. Zero-intensity pixels leave the screen
in its intrinsic dark state. In a printer or film recorder, a high-intensity pixel
leaves a black spot on otherwise white paper or transparent film. Zero-intensity
pixels leave the paper white or the film transparent. Thus any display system
has a characteristic pixel polarity. No matter what the display polarity, zero-
intensity flat fields are displayed uniformly flat. Thus flat-field performance
becomes an issue only at intermediate and high gray levels, and these may be
either black or white, depending on the display system polarity.
4.2.5.2 Pixel Interaction
Flat-field performance depends primarily on how well the pixels ‘‘fit together.’’
Flat panel displays, such as liquid ...