Color cathode-ray tube with reduced moire

Details Color cathode-ray tube with reduced moire Color cathode-ray tube with reduced moire

1995-03-02

1997-02-25

O'Shea, Sandra L.

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

313414, 313409, 313389, 313390, H01J 2950, H01J 3100

Patent

active

056062168

ABSTRACT:
A color cathode-ray tube has an in-line type electron gun. Third, fourth, and fifth electrodes form a sub-main lens, and a sixth electrode forms a main lens with the fifth electrode for focusing the three electron beams onto the phosphor screen. The second and fourth electrodes are electrically connected together and the third and fifth electrodes are electrically connected together. A ratio A of an axial length of the fourth G4 electrode to a diameter of the opening of the fourth electrode and a ratio B of an axial length of the fifth G5 electrode to the diameter of the opening of fourth electrode satisfy the following equations: 54A-5B+4.ltoreq.0, 55A-5B+7.gtoreq.0, A-0.18.gtoreq.0, and 95A+10B-73.gtoreq.0.

REFERENCES:
patent: 5170101 (1992-12-01), Gorski
patent: 5430349 (1995-07-01), New
"In-Line Type High-Resolution Color Display Tube", National Technical Report, vol. 28, No. 1, Feb. 1982.

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