Color display device with a deflection-dependent distance between outer beams
AssigneeU.S. Philips Corporation
InventorsAlbertus A. S. Sluyterman, Johannes C. A. Van Nes, Daniel Den Engelsen
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Abstract
A color display device comprises an electron gun, a display screen with a curved inner surface and a flat color selection electrode as well as a deflection means. The distance between the electron beams is dynamically varied, whereby the distance in the deflection space increases as the beams are deflected in at least one direction. The reduction of the distance enables the distance between the color selection electrode and the display screen to be decreased in that direction. As a result, the curvature of the inner surface of the display window is increased, which has a positive effect on the strength and weight of the display window.
Claims19
A color display device comprising a color cathode ray tube including an in-line electron gun for generating three electron beams, a color selection electrode, a display window having an inner surface which is curved in at least one direction, a phosphor screen on said inner surface, and means for deflecting the electron beams across the color selection electrode,
- characterized in that the color selection electrode is flat in at least said one direction, and
- the color display device comprises means for dynamically influencing the paths of the electron beams to increase the distance between the electron beams at the location of the deflection plane as a function of the deflection in said one direction.
Dependencies are inferred from the claim text.