Electric lamp and discharge devices: systems – Cathode ray tube circuits – Cathode-ray deflections circuits
Patent
1993-02-10
1994-09-27
Issing, Gregory C.
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Cathode-ray deflections circuits
313409, 313412, 313447, 315 131, H01J 2951, H01J 2956, H01J 2950
Patent
active
053509781
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. Simultaneously providing color video image information on more than one horizontal scan line allows for a reduction in horizontal scan frequency and associated magnetic deflection yoke operating criteria, and also increases beam dwell time on the screen's phosphor elements allowing for a reduction in individual beam current without sacrificing video image brightness while improving video image resolution. Individual beams are modulated by providing video drive signals to either segmented conductive portions in the G1 control grid in one embodiment, where each conductive portion includes a beam passing aperture, or in another embodiment to each cathode which is aligned with and directs emitted electrons through an associated aperture in the G1 control grid.
REFERENCES:
patent: 3928785 (1975-12-01), Standaart
patent: 3930120 (1975-12-01), Keller et al.
patent: 4361781 (1982-11-01), Depp et al.
patent: 4500808 (1985-02-01), McCandless
patent: 4521802 (1985-06-01), Ikeda
patent: 4616160 (1986-10-01), Holtey et al.
patent: 4853601 (1989-08-01), Odenthal
patent: 4954901 (1990-09-01), Okada et al.
A Multibeam CRT, D. L. Say, Sylvania Electric Products, Inc., Seneca Falls, N.Y., pp. 29-34, Information Display, May, 1970.
Chunghwa Picture Tubes Ltd.
Issing Gregory C.
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