Pincushion Correction for Penetration CRT Using Electromagnets
Original Publication Date: 1983-Jan-01
Included in the Prior Art Database: 2005-Feb-06
Voltage penetration screen color cathode ray tubes (CRTs), having a single electron gun, are well known in art. Such CRTs, since they have only one electron beam to direct, have no need for and, therefore, do not use either the alignment or convergence electronics that are necessary in conventional three-gun color systems. Typically, their screen receives a multiple layer phosphor coating that enables a cathode ray tube with a single electron gun to display information in up to four colors. The actual color that is displayed will depend upon the amplitude of the beam accelerating voltage employed. The overall quality of the display has a resolution comparable to that of a high quality mono-chrome tube employing conventional raster or scanning techniques.