Color cathode-ray tube having shadow mask with variable sized ap

Details Color cathode-ray tube having shadow mask with variable sized ap Color cathode-ray tube having shadow mask with variable sized ap

1984-03-09

1987-01-13

DeMeo, Palmer C.

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

313408, H01J 2907

Patent

active

046366830

ABSTRACT:
A color cathode-ray tube is disclosed, which has a shadow mask facing the face plate inner surface and having slit apertures formed in a predetermined arrangement. The center-to-center distance or interval Px of the slit apertures on the horizontal axis increases as a first function along the horizontal axis from the center of the shadow mask to the periphery region thereof. The center-to-center distance or interval Sx in peripheral regions of the shadow mask remotest from the horizontal axis increases as a second function different from the first function along the horizontal axis from the vertical axis to the periphery region thereof. The first and second functions representing the respective slit aperture intervals Px and Sx are given as ##EQU1## where X is 1, 2, 3, . . . , and .alpha. and .beta. are .alpha.<3 and .beta..ltoreq.6.

REFERENCES:
patent: 3686525 (1972-08-01), Naruse et al.
patent: 3947718 (1976-03-01), van Lent
patent: 4136300 (1979-01-01), Morrell
patent: 4162421 (1979-07-01), Morrell

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