Color cathode ray tube gun having control grid of varying thickn

Details Color cathode ray tube gun having control grid of varying thickn Color cathode ray tube gun having control grid of varying thickn

1990-10-25

1992-07-07

O'Shea, Sandra L.

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

313457, H01J 2951

Patent

active

051285860

ABSTRACT:
A shadow mask type color cathode ray tube fitted with an in-line type electron gun having a control grid of a quadrupole structure, wherein the control grid has an elongated rectangular hole having a horizontal diameter H and a vertical diameter V wherein the relationship expressed by 1<H/V<1.4 is established.

REFERENCES:
patent: 4242613 (1980-12-01), Brambring et al.
patent: 4251747 (1981-02-01), Burdick
patent: 4620133 (1986-10-01), Morrell et al.
Y. Baima et al., Japanese Utility Model Publication No. 62-44448, Pub. Nov. 24, 1987.

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