Electric lamp and discharge devices: systems – Cathode ray tube circuits – Cathode-ray deflections circuits
Patent
1990-07-19
1991-07-02
Blum, Theodore M.
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Cathode-ray deflections circuits
H01J 2956
Patent
active
050288504
ABSTRACT:
A deflection apparatus produces a field gradient that reduces a tendency of a major axis of a beam spot to become elongated at each corner, at each end of a horizontal axis and at each end of a vertical axis of a display screen relative to the beam spot at the center of the display screen. A beam spot stigmator causes the beam spot to be substantially anastigmatic at each of the corners, the end of the horizontal axis and the end of the vertical axis of the display screen.
REFERENCES:
patent: 3440483 (1969-04-01), Kasahoek et al.
patent: 3793554 (1974-02-01), Rossaert
patent: 3851215 (1974-11-01), Dekeijser et al.
patent: 4088930 (1978-05-01), Barten
patent: 4217566 (1980-08-01), Hamano et al.
patent: 4227122 (1980-10-01), Fujisawa et al.
patent: 4318032 (1982-03-01), Kureha
patent: 4547707 (1985-10-01), Yabase
patent: 4556857 (1985-12-01), Logan
patent: 4642527 (1987-02-01), Takahashi et al.
patent: 4683405 (1987-07-01), Truskalo et al.
patent: 4725763 (1988-02-01), Okuyama et al.
patent: 4730216 (1988-03-01), Casey et al.
patent: 4845401 (1989-07-01), Shimoma et al.
patent: 4864195 (1989-09-01), Masterton
patent: 4866336 (1989-09-01), Sluyterman
patent: 4900979 (1990-02-01), Shimoma et al.
Article entitled "Trends of '88 Color TV Line (V)", publ. in Gijutsu, Japanese publ., dated 1988.
Article Entitled "A New Picture Tube System With Homogeneous Spot Performance" in the names of Gerritsen et al., pub. in Japan Display 889, pp. 458-461.
Article Entitled "Deflection Yoke For Trinitron 20.times.20 In. Color CRT", in the names of Murata et al., pub. in SID 89 Digest, pp. 49-52.
A Book Entitled "Electron And Ion Optics", publ. 1988, the author being M. Szilagyi, pp. 468-475.
Article Entitled "32' High-Brightness Color Displayi For HDTV", authors being Ohsawa et al., distr. & presented in a SID Symposium Dec. 8, 1989.
RCA 85,810 entitled "A Deflection Sys. With a Pair of Quadrupole Arrangements", in the names of Johnson & Grote filed herewith.
Bechis Dennis J.
Grote Michael D.
Johnson Jeffrey P.
Blum Theodore M.
Henig Sammy S.
Laks Joseph J.
RCA Licensing Corporation
Tripoli Joseph S.
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