Television – Video display – Cathode-ray tube
Patent
1994-02-07
1996-09-17
Harvey, David E.
Television
Video display
Cathode-ray tube
348805, 313409, H04N 328
Patent
active
055573444
ABSTRACT:
A multi-beam electron gun for a color cathode ray tube (CRT) includes a plurality of vertically spaced, horizontal inline beams, where each inline array of beams provides the three primary colors of red, green and blue and adjacent inline beam arrays simultaneously trace adjacent horizontal scan lines on the color CRT's display screen. The beams in each horizontal inline array of beams are focused on a common spot on the display screen, with the three beams deflected across the screen in unison. Each inline array of beams is modulated in accordance with that portion of the video image which they form allowing adjacent, vertically spaced inline arrays to write different video image information on the screen in simultaneously forming adjacent portions of the color video image. In the beam-forming region of the electron gun, a charged grid includes an array of apertures including at least upper and lower horizontally aligned apertures for passing inline arrays of beams. Vertical spacing between each of the upper and lower apertures is given by S.sub.V and horizontal spacing between vertically aligned groups of apertures is given by S.sub.H, where:
REFERENCES:
patent: 3499982 (1970-03-01), O'neal
patent: 5350978 (1994-09-01), Chen
Chunghwa Picture Tubes Ltd.
Harvey David E.
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