Method for screening line screen slit mask color picture tubes

Details Method for screening line screen slit mask color picture tubes Method for screening line screen slit mask color picture tubes

1985-12-19

1987-01-06

Mathews, A. A.

Radiation imagery chemistry: process, composition, or product th

Post imaging processing

Physical developing

430 24, G03B 4100, G03C 500

Patent

active

046342478

ABSTRACT:
The present invention is an improvement in a method of screening a line screen slit mask color picture tube. Such method includes coating a faceplate panel of the tube with a photosensitive material, inserting a slit shadow mask into the panel and exposing the photosensitive material by passing light from a line light source through the slits of the mask. Such method further comprises positioning a generally cylindrical shaped lens between the line light source and the faceplate panel during exposure of the photosensitive material. The longitudinal axis of the lens is oriented perpendicular to the longitudinal axis of the line light source. The improvement comprises moving both the faceplate panel and the cylindrical shaped lens in synchronization in a direction parallel to the line light source during the exposing step.

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