Manufacturing method of color cathode ray tube

Details Manufacturing method of color cathode ray tube Manufacturing method of color cathode ray tube

2006-01-27

2008-11-11

Mahoney, Christopher (Department: 2862)

Photography

Exposing multicolor cathode-ray tube targets

C445S047000

Reexamination Certificate

active

07450842

ABSTRACT:
In an exposure step for forming a phosphor screen of a color cathode ray tube, correction lenses which are arranged between a light source and a panel are used in a state that a common correction lens which is used in common for three colors and three kinds of monochroic correction lenses are combined. The present invention can, in a flat-face-type color cathode ray tube, prevent the generation of the mislanding attributed to the difference in a wall thickness between a center portion and a peripheral portion of a panel thus improving the color purity.

REFERENCES:
patent: 6091191 (2000-07-01), Togawa
patent: 2005/0104494 (2005-05-01), Yotani et al.

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