Mask type color television tube and method of manufacturing the

Electric lamp and discharge devices – Cathode ray tube – Shadow mask – support or shield

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313408, 445 47, H01J 2907

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047758198

ABSTRACT:
Color television tube provided with a perforated mask and three aligned electron guns, the openings of the mask far from the center of the mask having a major axis inclined with respect to the vertical, the inclination .alpha. increasing with the distance from the center and this inclination being in the direction opposite to that of the image of a non-inclined slot of the mask that would be produced on the screen, by an optical projection system simulating the tube deflector.

REFERENCES:
patent: 4636683 (1987-01-01), Tokita et al.
Journal of the Television Society, vol. 8, No. 11, Jul./Sep. 1958, pp. 470-480; S. H. Kaplan: "Error Correction in Mask Type Colour Television Tubes", p. 477, Avant Dernier Paragraphe.
Patents Abstracts of Japan, vol. 6, No. 230 (E-142) [1108], 16 Nov. 1982; & JP-A-57 132 641 (Nippon Denki K.K.), 17.08.1982.
Patents Abstracts of Japan, vol. 8, No. 99 (E-243) [1536], 10 May 1984; & JP-A-59 16 249 (Mitsubishi Denki K.K.), 27.01.1984.

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