Cathode-ray tube having a faceplate panel with an...

Details Cathode-ray tube having a faceplate panel with an... Cathode-ray tube having a faceplate panel with an...

H - Electricity

01

J

313/35.19

H01J 29/86 (2006.01) H01J 29/18 (2006.01)

Patent

CA 1216619

Abstract of the Disclosure Improvement is provided in the appearance of a color picture type cathode-ray tube including a rectangular faceplate with an exterior surface having curvature along both the minor and major axes. The faceplate also includes a cathodoluminescent screen on an interior surface thereof. At least in the center portion of the faceplate, the curvature along the minor axis is at least 10 percent greater than the curvature along the major axis. Points on the exterior surface near the ends of the major axis, at the edges of the screen, lie in a first plane which is perpendicular to the central longitudinal axis of the tube; points on the exterior surface near the ends of the minor axis, at the edges of the screen, lie in a second plane which is spaced from and parallel to the first plane; and points on the exterior surface near the ends of the diagonals of the rectangular faceplate, at the edges of the screen, lie in a third plane which is spaced from and parallel to the first plane. The three planes are spaced from the center portion of the faceplate in the order of second plane, first plane and third plane.

461552

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