CRT with quadrupolar-focusing color-selection structure

Details CRT with quadrupolar-focusing color-selection structure CRT with quadrupolar-focusing color-selection structure

1982-08-11

1984-08-07

Demeo, Palmer C.

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

313408, H01J 2907

Patent

active

044646011

ABSTRACT:
CRT employs a quadrupolar-focusing color-selection structure comprising two or more apertured masking plates. Each plate has therein an array of substantially rectangular apertures which are positioned relative to one another to produce electrostatic quadrupolar-focusing lenses when operating voltages are applied thereto. The color-selection structure may, by its geometry, provide at the same time electrostatic dipolar deflecting fields when operating voltages are applied.

REFERENCES:
patent: 4059781 (1977-11-01), van Alphen et al.
patent: 4207490 (1980-06-01), Van der Ven
patent: 4311944 (1982-01-01), Bloom et al.
patent: 4316126 (1982-02-01), Hockings et al.
patent: 4350922 (1982-09-01), Catanese et al.
patent: 4427918 (1984-01-01), Lipp

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