Color picture tube having a phosphor screen with a semitranspare

Details Color picture tube having a phosphor screen with a semitranspare Color picture tube having a phosphor screen with a semitranspare

1990-07-25

1991-09-03

Yusko, Donald J.

Electric lamp and discharge devices

Cathode ray tube

Screen

313461, 313470, H01J 2910, H01J 2930

Patent

active

050457500

ABSTRACT:
A color picture tube includes a vacuum envelope having a faceplate, a phosphor screen formed to include semitransparent black light-absorption layers coated on a first region of the faceplate in stripes or in a matrix, and phosphor layers of blue, red and green emitting phosphors coated on a second region of the faceplate in stripes or in dots, and an electron gun, arranged within the vacuum envelope, for emitting and focusing electron beams. End portions of the phosphor layers extend over the black light-absorption layers, thereby forming overlapped portions. Gaps are provided between the phosphor layers and over the black light-absorption layers, thereby forming light-absorption sections on which no phosphor layer is provided.

REFERENCES:
patent: 4720655 (1988-01-01), Hinotani et al.

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