Koninklijke Philips Corporation N.V.

U.S. Philips Corporation

Arnoldus Antonius Maria Hendriks

Wilhelmus Marinus Maria Van De Steen

Jean Winters

Piet Christiaan Jozef Van Rens

Rudolf Maria Jozef Voncken

J&ouml;rg Meissner

Jan Harmannus Post

Theodoor Christiaan Anna Hens

Hernes Jacobs

Hendrik Pancratius Maria Bergmans

Maurice Andreas Wilhelmina Deuss

A display arrangement includes a cathode ray tube, inside which tube a mask with at least one curved outer edge is located. The mask is at least partly attached by at least part of the curved edge to the tube by means of at least a diaphragm arrangement. The diaphragm arrangement includes at least one diaphragm part in the form of an elongated folded sheet including a straight fold, said sheet extending from the straight fold to a curved fold and from the curved fold to a curved part of the sheet for attaching to the curved mask edge. Preferably, the straight fold has a varying folding angle and the curved fold follows a curve which enables the transition from the straight fold to the curved fold to provide a folded sheet which is free from inherent mechanical stress.

Display arrangement with reduced mechanical stress

A color display tube ( ) is disclosed, which comprises an improved suspension system of the color selection electrode ( ). The color display tube has suspension means that are constructed so as to be self-locking. The suspension means ( ) are provided with an additional flat portion ( ). This plate has an aperture ( ) that is shaped such that it has at least three surfaces of engagement ( ) for the free end portion ( ) of the supporting elements ( ) connected to the inside of the upright edge ( ) of the display window ( ). When the color display tube is exposed to shock loading, the construction of the flat portion ( ) is capable of absorbing this shock without the color selection electrode ( ) becoming detached from the supporting elements ( ). The action is based on the friction between the surfaces of engagement ( ) and the free end portion ( ). When a force is applied in the plane ( ) of the resilient element ( ), the suspension means ( ) slip from their rest position and are locked by a surface of engagement ( ), whereby the preload caused by the resilient element ( ) and the spring ( ) will cause the suspension means ( ) to resume its original position. In this manner, a color display tube ( ) with a good positional stability of the color selection electrode ( ) is obtained. Furthermore, the color selection electrode ( ) can be reclaimed in case the color display tube ( ) is rejected because there is no need to weld the suspension means ( ) to the free end portions ( ) anymore.

Color display tube with improved suspension of the color selection electrode

A color display tube ( ) is disclosed with an improved suspension of the color selection electrode ( ). In order to have a color display tube with good properties of, for instance, color purity, it is of eminent importance that the color selection electrode ( ) has and excellent positional stability. Especially wide screen tubes seem to be more sensitive to external shocks by which the color selection electrode ( ) may shift and cause discolorations. The positional stability of the color selection electrode ( ) can be improved by decreasing the friction between the color selection electrode ( ) and the supporting elements ( ) in the display window ( ) of the color display tube ( ). This is achieved by applying a supporting element ( ) with a free end portion ( ) having a small diameter and by applying a low force between the suspension means ( ) and the supporting elements ( ). As a consequence of the lightweight construction of the color selection electrode ( ), this force can be lowered to about 4 newtons.

A color display tube (,) is disclosed with an improved suspension of the color selection electrode (,). In order to have a color display tube (,) with good properties of, for instance, color purity, it is of eminent importance that the positional stability of the color selection electrode (,) is excellent. Especially wide-screen tubes seem to be more sensitive to shocks by which the color selection electrode (,) may shift and cause discolorations. The positional stability of the color selection electrode (,) can be improved by increasing the stiffness of the corner sections (,) of the color selection electrode (,). This can be realized by introducing an additional support plate (,) in the corner section (,). Also the optimization of the position of the supporting element (,) with respect to this corner section (,) yields an improvement.

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Eindhoven, Netherlands

Arnoldus Antonius Maria Hendriks