Color television display tube and method of manufacturing same
AssigneeU.S. Philips Corporation
InventorsJohannes VAN Esdonk, Petrus Franciscus Antonius Haans
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Abstract
In an assembly of at least two electrodes which are connected together in an insulating manner, said electrodes are kept at a given distance from each other by at least one member of an electrically insulating material situated between the electrodes which comprises a core which determines the distance between the electrodes and a jacket which directly adheres to the electrode material by heating. The material of the core has a higher melting point than the material of the jacket so that the core during effecting a connection between the jacket and the electrode material maintains its shape.
Claims13
An article of manufacture comprising first and second apertured metal sheets defining first and second electrodes, respectively, of a color selection electrode system for a color display tube and insulating means for maintaining said sheets in substantially congruent relationship with each other with the apertures in said first sheet being aligned in a predetermined relationship with the apertures in the second sheet;
- said insulating means being disposed between solid areas of said sheets and comprising a solid insulating core surrounded by an outer jacket, said jacket having a softening temperature lower than the softening temperature of said core so that upon heating the assembly formed by said sheets and said insulating means to a temperature at which said jacket is softened sufficiently to flow into contact with and adherently join said sheets to said core, said core remains solid forming an insulating spacer which maintains said sheets spaced a predetermined distance from each other.
A color display tube comprising an evacuated envelope, means to generate a plurality of electron beams, a display screen comprising a plurality of elongated regions luminescing in different colors, means for selectively impinging said beams each upon a respective color luminescent regions, said means for impinging comprising a first and a second system of lens electrodes defining apertures and having a potential difference between said first and second system to define a quadrupole lens in each of the apertures, the electric field of each said lens being substantially at a right angle to the path of electrons passing through the respective aperture, means for separating a lens electrode of the first system a predetermined distance from a lens electrode of the second system, said separating means comprising at least one member of an electrically insulating material positioned between the facing surfaces of the electrodes of said first and second systems, said member comprising a core for separating said electrodes by said predetermined distance and a jacket which adheres to the electrodes, said core consisting of a material having a higher melting-point than the material of the jacket.
Dependencies are inferred from the claim text.