Electric lamp and discharge devices – Cathode ray tube – Shadow mask – support or shield
Patent
1998-06-04
2000-10-17
Patel, Nimeshkumar D.
Electric lamp and discharge devices
Cathode ray tube
Shadow mask, support or shield
313461, 313477R, H01J 2980
Patent
active
061336815
ABSTRACT:
An object is to remove unnaturalness of the picture caused by inferior flatness of the apparent screen and provide a safety-designed color picture tube device having a flatter apparent screen without deterioration of static strength of the picture tube. The upper half of the panel (the part above the Z-axis) shows the vertical-axis (V) section and the lower half (the part below the Z-axis) shows the horizontal-axis (H) section. The outside surface of the panel is in a convex form with respect to the Z-axis in the vertical-axis (V) section with a radius of curvature of ROV and is in a convex form with respect to the Z-axis in the horizontal-axis (H) section with a radius of curvature of ROH. The inside surface of the panel is in an almost linear form in the vertical-axis (V) section with a radius of curvature of RIV and is in a convex form with respect to the Z-axis in the horizontal-axis (H) section with a radius of curvature of RIH.
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G. Adachi et al, "5.1: Super-Flat-Face Large-Size-Screen Color CRT", SID International Symposium Digest of Technical Papers, Anaheim, May 6-10, 1991, vol. 22, May 6, 1991, pp. 37-40.
Nomi Makoto, "Display Control Circuit and Device", Patent Abstracts of Japan, vol. 18, No. 252, Publication No. 06036710, Feb. 2, 1994, Application No. 04193657 dated Jul. 21, 1992 (English Abstract Only).
Inoue Akira
Nakamura Koji
Gerike Matthew J
Mitsubishi Denki & Kabushiki Kaisha
Patel Nimeshkumar D.
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