Flat cathode-ray tube and method of fabricating same

Details Flat cathode-ray tube and method of fabricating same Flat cathode-ray tube and method of fabricating same

1987-04-08

1988-08-16

DeMeo, Palmer C.

Electric lamp and discharge devices

Cathode ray tube

Beam deflecting means

313471, 313477R, 445 22, H01J 2986, H01J 924

Patent

active

047647060

ABSTRACT:
A flat CRT having a phosphor screen inclined with respect to the center axis of an electron beam and formed by applying phosphors to the inner surface of a tube wall. The tube inner surface is defined by rotating a plurality of logarithmic spiral curves having a constant angle of incidence and present in the x-y plane of a polar coordinate system in which the deflection center of the electron beam is its origin, the center axis extends through the origin and serves as the x-axis, and the y-axis extends through the origin and intersects the x-axis at right angles therewith. The spiral curves are rotated about the y-axis each through a specified angle to obtain a group of logarithmic curves defining the tube inner surface.

REFERENCES:
patent: 4588430 (1986-05-01), Sumiyoshi et al.
patent: 4654559 (1987-03-01), Hinotani et al.
"Wide Screen CFT Display", by Ohta, pp. 26 to 29, published by The Journal of the Institute of Television Engineers on Japan, vol. 38 No. 1, issued on Jan. 20, 1984.

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