Shadow mask color display tube

Details Shadow mask color display tube Shadow mask color display tube

1990-04-06

1992-03-24

Razavi, Michael

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

313402, 313440, H01J 2907

Patent

active

050991698

ABSTRACT:
Picture display device comprising an in-line color display tube of the shadow mask type having an elongate display screen with a short axis and a long axis, and comprising a deflection system. The plane in which the undeflected electron beams are located is parallel to the short axis of the display screen. The shadow mask has elongate apertures with longitudinal axes extending transversely to the short axis of the display screen. This configuration renders the picture display device less sensitive to unwanted displacements of the shadow mask in the direction transverse to the display screen, which is advantageous, particularly for display screen aspect ratios of more than 4:3.

REFERENCES:
patent: 3686525 (1972-08-01), Naruse et al.
patent: 3800176 (1974-03-01), Gross et al.
patent: 3914641 (1975-10-01), Standaart
patent: 4433268 (1984-02-01), Arisato
patent: 4636683 (1987-01-01), Tokita et al.

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