Koninklijke Philips Corporation N.V.

U.S. Philips Corporation

Ben Heinz Hageluken

Adrianus J Van Mensvoort

Boudewijn Lodewijk Kropman

Jo&atilde;o Gon&ccedil;alves De Oliveira, Jr

Joerg Meissner

Krishnekoemar Mahabir

A color display tube with an elongated phosphor screen having a pattern of discrete phosphor elements. In order to reduce landing errors of the electron beams, in particular in the X direction, and simultaneously minimize the amount of magnetic material used for the internal magnetic shield, the color display tube has an internal magnetic shield consisting of a tub that is deep-drawn from a foil, which tube has a bottom with an aperture for allowing passage of electrons. Material of the bottom adjoining the aperture for allowing passage of electrons has been bent outwards from the plane of the bottom. In this manner, material of the bottom of the tub which would otherwise have been cut away is used to enlarge the &ldquo;virtual&rdquo; height of the magnetic shield.

Color display tube comprising an internal magnetic shield

The invention relates to a display tube comprising an envelope portion having an inner surface provided with a first electrically conductive layer and a faceplate having an inner surface provided with a second electrically conductive layer , which faceplate is secured to the envelope portion at a sealing edge , and further comprising a contacting layer which is deposited in an area partially overlapping the first electrically conductive layer and the second electrically conductive layer in order to electrically connect said first electrically conductive layer to said second electrically conductive layer

Display tube

A color cathode ray tube and a getter assembly for use in such a cathode ray tube. The getter assembly comprises a conducting strip for contacting a high-voltage contact with a magnetic screening cone inside a cone portion of the tube. Due to the relatively large deflection angle of modern cathode ray tubes with flat display screens, the getter assembly has to be made smaller. The getter assembly of the invention has a notch for directly engaging the high voltage contact. In case of reworking during the manufacturing process, an operator can slide the new getter assembly with the aid of a special tool, from the neck side along the inner wall for engagement with the high-voltage contact.

Color cathode ray tube and getter assembly

A cathode ray tube, which has a getter assembly (,) for providing proper vacuum conditions within the tube. The getter assembly (,) comprises a resilient strip (,) having a first end portion (,) and a second end portion (,), and is detachably secured to a high voltage contact (,). A getter cup (,) is connected to the first end portion (,). The second end portion (,) is cooperatively engaged with one, preferably two protrusions (,) for limiting lateral movements of the resilient strip (,). The protrusions (,) are provided inside the envelope (,) of the tube. This arrangement reduces the risk of obtaining a layer of getter material at the wrong location within the tube.

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Eindhoven, Netherlands

Ben Heinz Hageluken