Color picture tube with shadow mask

Details Color picture tube with shadow mask Color picture tube with shadow mask

1976-08-31

1980-07-01

Segal, Robert

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

H01J 2907

Patent

active

042108420

ABSTRACT:
A color picture tube having a shadow mask provided with a plurality of vertical aperture rows arranged as horizontally juxtaposed to one another, each vertical row comprising the electron beam transmissive apertures vertically arranged in line with a predetermined pitch P.sub.y. With a view to making possibly occurring moires imperceptible, the arrangement of the apertures are made such that, when spatial deviation in the vertical positions between any two apertures in the horizontally adjacent aperture rows is represented by .DELTA.y, there may be included combinations of at least two different type aperture rows of different deviations .DELTA.y which satisfy the following condition ##EQU1## at least when n is equal to 1, 2, 3 or 4 and k is an odd number smaller than 2n.

REFERENCES:
patent: 3766419 (1973-10-01), Barbin
patent: 3973159 (1976-08-01), Barten

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