Abstract: A method of operating a positive tolerance color cathode-ray tube (CRT) having an evacuated envelope with an electron gun and a focus mask therein for generating at least one electron beam. The envelope further includes a faceplate panel having a luminescent screen of color-emitting phosphor stripes on an interior surface thereof. The color-emitting phosphor stripes each have a width slightly smaller than one-third of the screen pitch, such that large clipping and leaving tolerances may be achieved therewith. The focus mask, having a plurality of spaced-apart first conductive electrodes, is located adjacent to an effective picture area of the screen. The spacing between the first conductive electrodes defines a plurality of slots substantially parallel to the color-emitting phosphor stripes on the screen. Each of the first conductive electrodes has a substantially continuous insulating material layer formed on a screen facing side thereof.

Abstract: A color cathode-ray tube (CRT) has an evacuated envelope with an electron gun therein for generating at least one electron beam. The envelope further includes a faceplate panel having a luminescent screen with phosphor elements on an interior surface thereof. A focus mask, having a plurality of spaced-apart first conductive strands, is located adjacent to an effective picture area of the screen. The spacing between the first conductive strands defines a plurality of apertures substantially parallel to the phosphor elements on the screen. Each of the first conductive strands has a substantially continuous insulating material layer formed on a screen facing side thereof. A plurality of second conductive wires are oriented substantially perpendicular to the plurality of first conductive strands and are bonded thereto by the insulating material layer. The insulating material layer is composed of a silicate material.

Abstract: A method and apparatus for attaching a tension mask to a mask frame. The apparatus is comprised of a clamping plate upon which is mounted a frame clamp and a frame deflector assembly. Above the clamping plate is located a mask clamp assembly comprising a forming slide. A mask frame is inserted into the frame clamp and secured on a plurality of axes to the top of the clamping plate. As the mask frame is secured, a compression force is applied to the mask frame by the frame deflector assembly and a tension mask is aligned and positioned to the top of the mask frame. While the mask frame is in compression, a forming edge on the forming slide conforms an edge of the tension mask to the mask frame where it is then affixed. The compression force on the mask frame is then released causing the frame to impart a tension force on the tension mask.

Abstract: The present invention provides a focus mask and frame assembly for a cathode ray tube. The cathode ray tube includes an evacuated envelope enclosing a luminescent screen, a focus mask, and a support frame having at least two long sides for supporting the focus mask between the electron gun and the screen within the cathode ray tube. The focus mask has an active array area formed of a plurality of strands and cross wires separated by an insulating material and defining a plurality of focusing apertures within the array area. A border is attached to the strands opposite the insulating material along the upper and lower outer edges of the active array area. The borders extend into the active array area such that the cross wires overlie a portion of the borders and the borders form focusing apertures with the strands along the upper and lower edges of the array.

Abstract: A color cathode-ray tube (CRT) has an evacuated envelope with an electron gun therein for generating an electron beam. The envelope further includes a faceplate panel having a luminescent screen with phosphor elements on an interior surface thereof. A focus mask, having a plurality of spaced-apart first conductive strands, is located adjacent to an effective picture area of the screen. The spacing between the first conductive strands defines a plurality of apertures substantially parallel to the phosphor elements on the screen. Each of the first conductive strands has a substantially continuous slightly conductive insulating material layer formed on a screen facing side thereof. A plurality of second conductive wires are oriented substantially perpendicular to the plurality of first conductive strands and are bonded thereto by the slightly conductive insulating material layer.

Abstract: A metallization module for applying a metal layer on the screen of a CRT faceplate panel is described. The metallization module comprises a vacuum chamber having sidewalls, a base, an adaptor plate, and a lid. The adaptor plate is positioned between the lid and the sidewalls of the metallization module. Evacuation of the vacuum chamber causes atmospheric pressure to act against the outside surface of the lid, forming an airtight seal between the lid, the adaptor plate, and the top lip of the sidewalls. A plurality adjustable rods in conjunction with the adaptor plate are used to support the faceplate panel within the metallization module.

Abstract: A color cathode ray tube comprises a color selection mask stretched in at least one direction, the mask comprising on its peripheral surface mask vibration damper means in the form of a coupled oscillator of the type comprising a central part attached to the surface of the mask and two wings extending on either side of the central part.

Abstract: An apparatus and method for dampening vibration of a television tube in a tension mask. The apparatus include a vibration reducing assembly that is affixed between a mask frame and a busbar assembly of a tensioned mask. The vibration reducing assembly is comprised of a tension coil spring with a pin inserted in the center of the coils. As the busbar assembly or mask is vibrated, the spring pulls and releases, allowing the internal pin to rub against the coils, scrubbing away energy. The busbar assembly and the mask are formed such that their independent resonant frequencies differ greatly from one another.

Abstract: The invention concerns a display screen with active matrix comprising first and second transparent substrates enclosing a crystal liquid material, at least one counter electrode, pixel electrodes in lines and in columns, data lines, perpendicular selection lines, control devices for connecting the lines to the pixel electrodes, the pixel electrodes being controlled such that the electrodes connected to a common selection line have the same polarity while, for two adjacent selection lines the polarity is reversed, the pixel electrodes being located in a first plane while the other elements are located in a second plane distanced from the first plane, and a transparent mass plane being located between the two planes. Moreover, the mass plane has a structure such that at least the part found between two pixel electrodes of same polarity is recessed. The invention is applicable to LCD.

Abstract: A method and apparatus for applying crosswires to a tension mask. The method includes winding crosswires around various drum assemblies and then using transfer devices to remove sections of crosswires and transfer them to tension mask frame assemblies.

Abstract: The present invention provides a tension mask for a cathode-ray tube. The tension mask has an active aperture portion formed by a plurality of parallel strands extending between cantilevers on opposed sides of a mask support frame. The tension mask further comprises border shields mounted over each end of the frame cantilevers, whereby the strand ends are held to the cantilevers in a predetermined spaced-apart relationship. The border shields on opposing sides of the frame extend toward the active aperture portion of the tension mask and is substantially aligned with the screen matrix of the CRT. The tension mask has a lower coefficient of thermal expansion than that of the mask frame, cantilevers, and border shield.

Abstract: A color cathode-ray tube (CRT) having an evacuated envelope with an electron gun therein for generating an electron beam is disclosed. The envelope further includes a faceplate panel having a luminescent screen with phosphor lines on an interior surface thereof. A focus mask, having a plurality of spaced-apart first conductive lines, is located adjacent to an effective picture area of the screen. The spacing between the first conductive lines defines a plurality of slots substantially parallel to the phosphor lines on the screen. Each of the first conductive lines has a substantially continuous insulating material layer formed on a screen facing side thereof. A plurality of second conductive lines are oriented substantially perpendicular to the plurality of first conductive lines and are bonded thereto by the insulating material layer. A cap layer is formed over the plurality of second conductive lines and the insulating material.

Abstract: The invention relates to a tension mask frame for a CRT having a generally rectangular support frame to which a peripheral portion of a tension mask is attached. The support frame has at least a long side and a short side. One side extends along an outer edge of the mask and protrudes inward toward the outer edge of the mask. The short side is attached to the long side to form a closed corner portion between the long side and short side of the support frame. The closed corner portion is used to suspend the mask within a panel portion of the color cathode ray tube.

Abstract: An apparatus for maintaining tension in a mask frame of a cathode ray tube. The apparatus includes affixing a shadow mask to a pair of triboxes disposed along opposite sides of a mask frame at a predetermined tension. The triboxes are coupled to the mask frame by braces having a different coefficient of thermal expansion than the triboxes so as to compensate for the expansion of the frame during thermal cycling of the cathode ray tube. Consequently, it is possible to maintain the tension force applied to the shadow mask by the mask frame.

Abstract: A cathode ray tube comprising a color selection mask made from a material in tension and having a relatively low coefficient of thermal expansion, supported by a frame made from a material having a higher coefficient of thermal expansion. Along at least two sides of the frame are disposed two metal inserts made from a material whose coefficient of thermal expansion is similar to that of the mask. The inserts are secured to the opposed sides of the frame at their middle, and the mask is welded to the inserts. The mechanical problems relating to the differences in expansion of the materials making up the mask and the frame, during the high-temperature tube manufacturing steps, are avoided.

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 inner surface of a faceplate panel of the CRT. The luminescent screen assembly includes an organic conductive (OC) layer overcoated with an organic photoconductive (OPC) layer. Three different color-emitting phosphors are sequentially deposited over portions of the OPC layer by uniformly charging and than selectively discharging desired areas thereof. Appropriate color-emitting phosphors are then deposited on the discharged areas. The first color-emitting phosphor lines are deposited on the OPC layer by charging and then selectively discharging the OPC layer using a symmetric exposure profile. Thereafter, the OPC layer is charged again and selectively discharged to deposit the second color-emitting phosphor lines using an asymmetric exposure profile.

Abstract: A detensioning mask frame assembly for a cathode-ray tube including a subframe constructed of support members that provide a support structure for mask holding blades is disclosed. The support members have different temperature coefficients of expansion, such that when heated, the support members are deflected with different thermal expansion rates causing the mask holding blades to move toward each other, and as such, relieve tension from the mask.

Abstract: The invention provides a tension mask support frame assembly having a pair of support blade members attached to a frame. The support blade members are attached to opposite sides of the frame at a central location whereby each support blade member has a pair of distal ends extending from the central attachment point. A damping scrubber is disposed in the space between the support blade member and the frame near a distal end of the support blade members. Vibrations in the tension mask are thereby reduced through the transfer of the vibrations to the frame through rubbing action of the damping scrubbers.

Abstract: The invention relates to a tension mask frame assembly for a CRT having a substantially rectangular mask support frame. The mask support frame has a pair of long sides extending about a central major axis and a pair of short sides extending about a central minor axis. On at least one pair of these sides, a midsection is disposed between and is continuous with two end sections. The midsection is made of a material having a coefficient of thermal expansion which is less than a coefficient of thermal expansion of the end section material. A tension mask is supported to the mask support frame at attachment points adjacent the pair of sides having the midsection.

Abstract: A cathode ray tube has a tensioned mask supported by a support frame. The tension mask being susceptible to vibration and adapted for mounting in tension within the cathode ray tube. The tension mask includes damper wire support springs attached to, and extending from, opposite sides of the tension mask support frame. The damper wire support springs having a compliance section supporting a damper wire in contact with and across the surface of the tension mask for damping vibrations in the mask.