Color cathode ray tube having phosphor screen with specific hori

Details Color cathode ray tube having phosphor screen with specific hori Color cathode ray tube having phosphor screen with specific hori

1998-06-03

2000-05-16

Patel, Vip

Electric lamp and discharge devices

Cathode ray tube

Screen

313402, H01J 2910

Patent

active

060641479

ABSTRACT:
In a in-line plural beam color cathode ray tube, the phosphor screen is configured such that a horizontal phosphor dot pitch Ph is nearly uniform in a first region within a first predetermined distance from the vertical center line toward sides of the useful area and increases gradually with increasing distance from the vertical center line toward the sides of the useful area outside of the first region; and a vertical phosphor dot pitch Pv decreases gradually with increasing distance from the vertical center line toward the sides of the useful area outside of the second region, where Pv is a vertical distance between a first horizontal row of the phosphor dots and a second horizontal row of the phosphor dots and adjacent to the first horizontal row, and Ph is a horizontal distance between a first phosphor dot of a first color in the first horizontal row and a second phosphor dot of the first color in the second horizontal row and nearest the first phosphor dot.

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