Method of manufacturing striped phosphor screen for black matrix

Details Method of manufacturing striped phosphor screen for black matrix Method of manufacturing striped phosphor screen for black matrix

1978-11-09

1981-05-12

Hoffman, James R.

Coating processes

Electrical product produced

Fluorescent or phosphorescent base coating

427 8, H01J 2932

Patent

active

042672040

ABSTRACT:
In the manufacture of a striped phosphor screen for a black matrix type color picture tube, a pattern of stripes of a light-absorbing material is first formed on the faceplate of a glass envelope to define transparent striped windows thereon by a known process and then phosphor materials are applied to the striped windows by the use of a nozzle assembly having at least one nozzle capable of discharging a phosphor material, without owing to the photolighography. The coating apparatus comprises a nozzle assembly including one or more nozzles, drivers for effecting relative movement between the nozzle and the faceplate of the glass envelope in a first direction in the plane of the faceplate and perpendicular to the stripes, in a third direction perpendicular to the faceplate and in a second direction longitudinal of the stripes, sensors for detecting the position of the nozzle, generators for producing a positional error signal and control for controlling the position of the nozzle.

REFERENCES:
patent: 4052519 (1977-10-01), Prazak

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