Color display tube with coma correction

Details Color display tube with coma correction Color display tube with coma correction

1992-05-29

1994-10-11

O'Shea, Sandra L.

Electric lamp and discharge devices

Cathode ray tube

Beam deflecting means

313413, H01J 2954, H01J 2958

Patent

active

053550501

ABSTRACT:
Color display tube comprising an electron gun system (5) of the "in-line" type and an electromagnetic deflection unit. This unit is provided with coma correctors 14 and 14' at its gun side, which correctors, viewed from the gun system, provide a pincushion-shaped vertical deflection field component and a barrel-shaped vertical deflection field component. These components are used to reduce the "green droop" (=anisotropic Y coma) in the corners and at the ends of the display screen axes to an equal extent without the spot shape of the outer beams being influenced detrimentally.

REFERENCES:
patent: 4196370 (1980-04-01), Hughes
patent: 4455542 (1984-06-01), Sluijterman et al.
patent: 4524340 (1985-06-01), Sluyterman
patent: 4600858 (1986-07-01), Iwasaki et al.
patent: 4710671 (1987-12-01), Sluyterman
patent: 4874983 (1989-10-01), Sluyterman
patent: 4962333 (1990-10-01), Sluyterman

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