Method of producing CRT fluorescent screen

Details Method of producing CRT fluorescent screen Method of producing CRT fluorescent screen

1992-02-19

1993-06-08

McCamish, Marion E.

Radiation imagery chemistry: process, composition, or product th

Producing cathode-ray tube or element thereof

430 24, 427 68, G03C 500

Patent

active

052178331

ABSTRACT:
A method of producing a fluorescent screen of a cathode-ray tube inclusive of a process to form carbon stripes by coating an inner surface of a panel with a carbon film and then drying, exposing and developing such a carbon film. The method comprises the steps of perceiving the carbon stripes on the inner surface of the panel as video information by optical means, then inputting the video information to an image processor to calculate the line widths of the carbon stripes, and controlling the exposure during the carbon stripe exposure process on the basis of the line widths thus calculated. According to this method, the line widths of the carbon stripes can be maintained constant to enhance the quality stability, and the measuring operation is remarkably simplified by a completely automated mechanical system.

REFERENCES:
patent: 4696879 (1987-09-01), Yamazaki
patent: 4859549 (1989-08-01), Hayashi

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