Abstract: A tension mask frame assembly for a color cathode-ray-tube including a frame having four respective sides, two of the sides paralleling each other and having insert receiving brackets for supporting strand termination inserts therein and vertical mask strands welded to said termination inserts. The strands have a plurality of cross-wires extending perpendicular to the strands and attached thereto by a conductive bonding material. The wires and termination inserts are composed of materials having a first coefficient of thermal expansion. The frame and receiving brackets are composed of materials having a second coefficient of thermal expansion. The termination inserts thermally expand and contract independently of the frame and receiving brackets, whereby movement of the strands in the horizontal dimension is controlled by thermal expansion and contraction of the termination inserts and cross-wires.

Abstract: The process for manufacturing a plasma display panel, wherein two glass substrates are sealed together using a sealing material of epoxy or polyvinyl butyrate. The sealed structure provides a space between the substrates to contain a discharge gas. The choice of an epoxy or polyvinyl butyrate sealing material allows for relatively low processing temperatures in order to cure the sealing material. This relatively low processing temperature, of between 200° C. and 300° C., lowers the risk of cracking or microcracking of intermediate layers, which are formed on the surfaces of the substrates.

Abstract: The invention proposes a pumping tube shape which makes it possible, on the one hand, to guide the pumping tube when positioning the latter on the tile and when producing the seal by heating and, on the other hand, to prevent runs inside the pumping hole. Moreover, the pumping tube of the invention makes it possible to produce an almost ideally distributed homogeneous seal, thereby ensuring that the latter seals reliably. The invention also relates to a plasma display panel having the pumping tube of the invention.

Abstract: A method of manufacturing a luminescent screen assembly for a color cathode-ray tube (CRT) is disclosed. The luminescent screen assembly is formed on an interior surface of a faceplate panel of the CRT. The luminescent screen assembly includes a light-absorbing matrix having a plurality of substantially equally sized openings formed therein. The matrix is formed by applying one or more light sensitive layers on the interior surface of the faceplate panel of the CRT tube. The one or more light sensitive layers includes a photoresist material. Also, the one or more light sensitive layers includes a contrast enhancing material. The one or more light sensitive layers are selectively exposed to actinic radiation projected through openings in a shadow mask, positioned a fixed distance from the screen assembly.

Abstract: The present invention relates to a process for the manufacture of a plasma panel comprising two tiles facing each other and containing a plasma discharge gas, at least one of the tiles having an array of electrodes serving to define a number of discharge cells and an array of supporting barriers delimiting the cells, the barriers being made of a material giving them a high and open porosity. According to the process, the barriers 30 are formed in a single step using a paste comprising the said material and an organic resin.

Abstract: A split foot damper for damping vibrational energy on a tension mask having a border with an edge. The apparatus has a first element having a first portion in moveable contact with a surface of the border and a second portion in moveable contact with the edge of the border, and a second element having a third portion in moveable contact with the surface of the border and a fourth portion in moveable contact with the edge of the border, where the two elements are connected to each other at a point that is affixed to the surface of the border. As the mask vibrates, the vibrational energy is transferred to the split foot damper, wherein vibrational energy is dissipated as the portions of the split foot damper makes contact against the surface and edge of the border.

Abstract: An apparatus and method for terminating crosswires on a tension focus mask. The apparatus includes a busbar support rail aligned with a busbar attached by a set of spacers and busbar support clips, a termination assembly and a set of termination spring clips. The method includes aligning the busbar support rail with the busbar, attaching busbar support clips to the busbar, affixing spacers to a side of the busbar and then placing a termination strip along the side of the spacer. After all the elements have been aligned, crosswires are drawn across the top of the busbar and attached to the termination strip. An electrical adhesive is applied over the busbar top and allowed to cure. After the electrical adhesive cures, the crosswires between the busbar and the termination strip are cut so as to provide electrical isolation.

Abstract: The present invention relates to an implosion prevention band for a CRT comprising an evacuated envelope having a mask and corresponding faceplate panel with sidewalls joined to a funnel. The faceplate panel and sidewalls form external corner surfaces and a peripheral inside blend radius. An implosion prevention band surrounds and closely hugs at least an edge of the external corner surfaces of the faceplate panel. The band extends along the exterior surface of the sidewall such that the width of the band is at or near the inside blend radius of the faceplate panel. The band is under tension to produce radially inwardly directed force components through the corners of the faceplate panel and primarily near the blend radius to produce a high degree of implosion protection for the CRT.

Abstract: The invention applies to plasma display panels consisting of two facing plates enclosing a discharge space and comprising an array of discharge cells (X1, X2, . . . , X5, etc.). A display panel according to the invention has at least one porous layer which contains less than 10% of a hardening agent. The porous layer is either a barrier layer or a gettering layer.

Abstract: A method for manufacturing a metallized luminescent screen, for a cathode-ray tube, includes the steps of: depositing at least one phosphor layer on an inner surface of a faceplate of a panel to form said luminescent screen, depositing on said layer a sub-layer consisting of a lacquer, drying said sub-layer to form a film, coating at least partially the internal surface of the faceplate panel with an aqueous solution of a copolymer of acrylic/styrene, drying the copolymer coating, depositing a metallic layer onto said copolymer coating, removing the organic materials contained in the luminescent screen, the film and the copolymer coating, by baking the tube panel.

Abstract: A color cathode-ray tube comprises a mask, intended for selecting the colors, which is tensioned on a support frame, the frame/mask assembly including means for preventing the tensioned mask from vibrating under the influence of external vibrations. These means comprise at least one mechanical oscillator, coupled to the mask, in the form of metal strips produced by partial cutting of the surface of the peripheral region of the mask.

Abstract: A method for operating a cathode-ray tube electron gun, suitable for multimode operation, for example, in order to display television images and multimedia images of the SVGA, XGA type, in which the zone for forming the electron beam generated by the cathode has at least two control electrodes. The two control electrodes are connected to voltage sources in such a way that the potential difference between the two control electrodes increases when the beam current decreases.

Abstract: The present invention provides an improvement in a color picture tube having a tension mask supported by a support frame mounted within said tube. The mask has a significantly lower coefficient of thermal expansion than the frame. The frame has two substantially parallel cantilevered members, each member has a distal edge to which the tension mask is attached. At least one of the distal edges has two sections separated by a gap therebetween. The two sections include an inner section and an outer section. The mask is glued to the inner section and is welded to the outer section.

Abstract: The invention relates to image display screens using a cell matrix to form an image. More particularly, the invention relates to means for facilitating relative positioning of various elements during manufacturing. The inventive screen consists of at least two electrode networks. One of the characteristics of the invention is that at least one of said networks consists of “variable direction” electrodes which are shaped in such a way that they spread out and then return towards their longitudinal axis to intersect and pass alternatively from one side to the other of said axis. The spread of a variable direction electrode in relation to the longitudinal axis has an amplitude depending on the position of the electrode in respect to a reference position. This arrangement provides appropriate dimensional leeway to facilitate superpositioning of several masks of varying dimensions. The invention is used in “flat screens”, specially plasma panels.

Abstract: A method of manufacturing a luminescent screen assembly for a color cathode-ray tube (CRT) is disclosed. The luminescent screen assembly is formed on an interior surface of a faceplate panel of the CRT. The luminescent screen assembly includes color-emitting phosphors that are sequentially deposited over portions of the interior surface of the faceplate panel of the CRT. A filming composition is electrostatically sprayed over the color-emitting phosphors. The filming composition comprises an acrylic polymer dissolved in a solvent mixture of one or more high-volatility solvents combined with one or more low-volatility solvents.

Abstract: A display apparatus 10 comprises at least one speaker 16 and a cathode-ray tube (CRT) 14 secured within an enclosure 12 to a plurality of mounting bosses 50. The cathode-ray tube 14 has an evacuated envelope 17 with a substantially rectangular-shaped faceplate panel 18 having four corners and a viewing portion 26 extending to a peripheral sidewall 28. The viewing portion 26 has a luminescent line screen 32 on the interior surface thereof The viewing portion 26 including two orthogonal axes, a major axis, X, parallel to a longer dimension of the viewing portion and a minor axis, Y, parallel to a smaller dimension of the viewing portion. The CRT 14 has therein an electron gun 38, capable of generating at least one electron beam, aligned along a central longitudinal axis, Z, of the CRT that is perpendicular to the major and minor axes. The CRT 14 also has a color selection electrode 36 in proximity to the interior surface of the viewing portion 26 of the faceplate panel 18.

Abstract: The present invention relates to a plasma panel comprising a first tile called the rear tile and a second tile called the front tile, the two tiles being joined together with a distance of separation defining a space filled with gas, a first array of electrodes which is formed from a set of two parallel electrodes, called the sustaining electrodes, and which is placed on one of the tiles, a second array of electrodes called the addressing electrodes which is placed on the other tile, and an array of barriers which is placed on one of the tiles parallel to the array of addressing electrodes. According to the invention, the array of barriers is positioned on the tile carrying the first array of electrodes, the barriers having a height of less than the distance of separation between the two tiles and the separation between the two tiles is obtained by specific spacing means.

Abstract: A color picture tube having a tension mask attached to a support frame, wherein the mask if made from a material having a significantly lower coefficient of thermal expansion than the coefficient of thermal expansion of the material of the frame. The frame tensions the mask to have a fundamental resonant frequency of 90 Hz±20 Hz.

Abstract: A plasma panel includes a front faceplate and a rear faceplate between which are constituted cells. The two faceplates are assembled together by bracing means which determine the distance between the two faceplates. The plasma panel further includes barriers arranged between the two faceplates, and serving in particular to prevent the discharges of one cell from extending to the other neighboring cells. The invention is characterized in that the height of the barriers is less than the distance between the faceplates. This arrangement provides a conditioning effect to the cells to thereby enabling them to be activated more speedily. The invention is in particular applicable to plasma panels using luminophores of different colours.

Abstract: A plasma display panel having a back substrate, a first set of parallel electrodes associated to the back substrate, a front transparent substrate, a second set of electrodes associated to the front substrate, the electrodes of the second set having a direction which is transverse with respect to the direction of the electrodes of the first set, and partition walls which are situated between the back and the front substrates, and extend in the direction of the second set of electrodes. This display is characterized in that: each electrode of the second set faces the edge of a corresponding partition wall, and each electrode of the second set comprises, for each cell, a transparent protrusion extending towards the side of the partition wall corresponding to this cell. The display may be of the matrix type or of the coplanar type.