Color selection means comprising lens electrodes spaced by grains of insulating material
AssigneeU.S. Philips Corporation
InventorHubertus Joseph Ronde
Life of this patent
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Abstract
In an electrode assembly of at least two electrodes connected together in an insulating manner, said electrodes are kept at a defined distance by means of grains of an electrically insulating material. Said grains are sunk on two sides in layers of an adhesive material present on the facing surfaces of the electrodes and the sum of the thicknesses of which is smaller than the distance between the relevant electrodes.
Claims3
A colour display tube comprising in an evacuated envelope means to generate a number of electron beams, a display screen comprising a large number of regions luminescing in different colours, and colour selection means having a large number of apertures which associate each electron beam with luminescent regions of one colour, which colour selection means comprise a first and a second system of lens electrodes, a lens electrode belonging to the first system being kept at a defined distance from a lens electrode belonging to the second system, characterized in that a lens electrode belonging to the first system is kept at a defined distance from a lens electrode belonging to the second system by means of grains of an electrically insulating material present between the facing surfaces of the electrodes, which grains are sunk on two sides in layers of an adhesive material present on the two said surfaces of the electrodes, the sum of the thicknesses of the said layers being smaller than the distance between the relevant electrodes.
Dependencies are inferred from the claim text.