dot pitch

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dot pitch - Free On-line Dictionary of Computing (26 May 2007) :

  dot pitch
  
     <hardware> The distance between a dot and the closest dot of
     the same colour (red, green or blue) on a color CRT.  Dot
     pitch is typically from 0.28 to 0.51 mm but large presentation
     monitors may go up to 1.0 mm.  The smaller the dot pitch, the
     crisper the image, 0.31 or less provides a sharp image,
     especially when displaying text.
  
     Dot pitch measurements between conventional tubes and Sony's
     Trinitron tubes are roughly, but not exactly comparable.
     Sony's CRTs use vertical stripes, not dots, and its
     measurement is the distance between stripes, not the diagonal
     distance between dots.
  
     ["The Computer Glossary", Alan Freedman].
  
     (1995-12-14)