Electric lamp and discharge devices – Cathode ray tube – Plural beam generating or control
Patent
1992-04-09
1994-06-07
O'Shea, Sandra L.
Electric lamp and discharge devices
Cathode ray tube
Plural beam generating or control
220 21A, 313477R, 313408, H01J 2986
Patent
active
053192800
ABSTRACT:
A display device having a rectangular display window with a major and a minor dimension, and a deflection unit producing a scanning line raster on a display screen on the inner surface of the display window, the scan lines extending in the minor direction. The inside surface of the display window has a major radius of curvature (R.sub.cmajor), a minor radius of curvature (R.sub.cminor), a diagonal dimension (D) and an aspect ration (A), which parameters are related by the formulas 1.1<R.sub.cminor /D<2.5, also 2.5<R.sub.cmajor /D, also R.sub.cmajor >A*R.sub.cminor. The display window is thereby very flat and scanning line raster distortion is reduced so that it is easily correctible by the deflection fields produced by the deflection unit.
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Kraus Robert J.
O'Shea Sandra L.
Patel Vip
U.S. Philips Corporation
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