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AssigneeKoninklijke Philips Electronics N.V.
InventorsJOHANNES C. A. VAN NES, DANIEL DEN ENGELSEN, ALBERTUS A. S. SLUYTERMAN
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Color display device with a deflection-dependent distance between outer beams. A color display device comprises an electron gun, a display screen and a 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 decreases 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 increased in that direction. As a result, the curvature of the color selection electrode is increased, which has a positive effect on the strength and the doming and microphonic properties of the color selection electrode.
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 and a phosphor screen on an inner surface of a display window and a means for deflecting the electron beams across the color selection electrode, characterized in that the color display device comprises a first and a second means, which are arranged at some distance from each other, to dynamically influence the convergence of the electron beams, to decrease the distance between the electron beams at the location of the deflection plane as a function of the deflection in at least one deflection direction.
Dependencies are inferred from the claim text.