Abstract: A shadow mask for use in a cathode ray tube comprises a mask body having a mask effective section where a number of electron beam passage apertures are formed and a skirt portion provided at a peripheral edge of the mask effective section, and a mask frame arranged to be layered outside the skirt portion. The mask frame and the skirt portion are resistance-welded to each other at a plurality of portions. At each welding portion, a plurality of concave and/or convex portions each having a smaller area than an area of a contact surface of an electrode for resistance-welding are formed at an inner surface portion of the skirt portion which the electrode contacts.

Abstract: A method and apparatus for improving magnetic shielding in mask-frame-assemblies. The system includes providing a cathode ray tube, a mask frame assembly disposed within the cathode ray tube and at least one magnetic shield disposed on the edge of the mask frame assembly. These magnetic shields provide shielding for the horizontal component of the terrestrial magnetic field and thus reduces distortion in the picture displayed on the tube.

Abstract: The invention relates to a flat color CRT in which the upper plate width of a frame for tensioning and fixing a shadow mask is enlarged so that the CRT is free from an influence from howling of the shadow mask and welding and productivity of the shadow mask and the frame may be simplified. The shadow mask assembly comprises a shadow mask having an effective area with slots and a non-effective area without slots in the periphery; and a frame fixing body for tensioning the shadow mask; wherein the shortest distance tM from the outermost end of a main frame welded to the shadow mask to the interface between the effective area and the non-effective area and the width tW of the mask welding part formed at the upper part of the main frame have the relation of 0.14 ≤ t W t M ≤ 1.0 .

Abstract: The present invention provides a color cathode ray including a pair of long frames, a pair of opposing short frames that are fixed to the pair of long frames and support the long frames, and a shadow mask fixed to the pair of long frames in a state applied with a tensile force. The short frames have substantially-triangular bent parts formed to protrude toward the shadow mask. Since such a cathode ray tube can decrease an internal moment of the shadow mask structure, the displacement of the shadow mask in a direction to recede from the phosphor screen surface of the color cathode ray tube can be suppressed and the q-value deviation also can be suppressed even if the shadow mask is expanded by heat generated by an impact of electron beams.

Abstract: A tension mask frame assembly for a color cathode ray tube, includes: a tension mask having a plurality of strips on which slots are formed, the slots being separated by a predetermined distance from each other on a thin plate; real bridges for partitioning slots at a predetermined pitch interval by connecting adjacent ones of a plurality of strips to each other; and a frame which supports the corresponding edges of the tension mask; whereby the vertical pitch of the real bridges becomes smaller, such as in a stepwise relation, in a direction from the center portion of the tension mask to the peripheral portion of the tension mask.

Abstract: The present invention relates to a shadow mask comprising an effective surface including electron beam passage holes all over, an ineffective surface having a certain width surrounding the circumference of the effective surface, a skirt portion curved formed on the circumference of the ineffective surface, and concave-compressed beads formed on the ineffective surface along the skirt portion in order to improve the stiffness of the effective surface. The present invention can prevent distortions of a screen by forming the beads on the ineffective surface which is capable of improving stiffness of the shadow mask by increasing a lot value of the section modulus performing a function resisting the relative vibration occurred between the effective surface and skirt portion.

Abstract: A color picture tube having a tensioned mask supported by a frame mounted within the tube. The frame is constructed of a carbon steel material, and the mask is constructed of a nickel alloy material that expands substantially less per unit length than does the frame in the normal operating temperature range of the tube, and expands substantially the same per unit length as the frame in the higher thermal cycling temperature range used during tube processing.

Abstract: A method and apparatus of maintaining spacing between tension focus mask strands in a tension focus mask. The method includes providing a tension focus mask comprising busbars with crosswires connected therebetween. A permanent adhesive is applied to the screen-side of the mask strands. Next, novel non-permanent horizontal guide members are attached to the gun-side of the mask strands, where an adhesive is applied to the guide member before the guide members are applied to the mask. The guide members maintain the vertical mask strand spacing during: (1) the application of the horizontal crosswires to the screen-side of the mask and (2) the subsequent thermal processing. The thermal processing cures the adhesive on the screen-side of the mask, thereby: (1) permanently attaching the crosswires to the mask strands and (2) volatilizing the adhesive on the gun-side of the mask strands such that the non-permanent guide member detach from the mask strands.

Abstract: A cathode-ray tube comprises a color-selection frame/mask assembly, the mask being held under tension by being welded onto the ends of the long sides of the frame, the frame/mask assembly being suspended within the tube with the aid of supports capable of serving to augment the mechanical rigidity of the sides onto which these supports are welded and to cause the long sides of the frame to approach closer to each other during the phases of manufacture at high temperature.

Abstract: A color selection apparatus for a cathode ray tube, having a frame formed with a pair of supporting members arranged facing each other at a predetermined distance therebetween and a pair of elastic members coupled to the supporting members; and a mask formed with a plurality of slits for passing electron beams and fixed to the supporting members under tension. Each of the elastic members is formed with a pair of opposite parts facing each other in parallel at a predetermined distance therebetween, and a connection part perpendicularly arranged between the opposite parts. The opposite parts are preferably opposite each other in a direction where the electron beams advance (z-axis direction of the cathode ray tube). Alternatively, the opposite parts are opposite each other in a major direction of the mask (x-axis direction of the cathode ray tube).

Abstract: Disclosed is a color cathode ray tube that can optimize the distance between a spring hole of a spring and a welded junction point and the distance between the junction points with respect to the weight of a mask-frame assembly. The color cathode ray tube includes the mask-frame assembly and a panel that are assembled together by fastening a fixing pin formed on an inner surface of the panel into the spring hole formed on one end portion of the spring of which the other end portion is fixed to the mask-frame assembly directly or through two or more junction points of a spring holder. The cathode ray tube satisfies the condition of 5.0<(A/B)×W≦8.0, where A(cm) is a distance between a center of the spring hole and a center of the junction point most adjacent to the spring hole (i.e., the shortest junction point), B(cm) is a distance between the center of the shortest junction point and the center of the junction point apart farthest from the spring hole (i.e.

Abstract: The invention provides an improved vibration damper for use in a tension mask assembly of a CRT. The improved vibration damper is provided along edges of a tension mask which is attached to a support frame. The vibration damper consists of an elongated strip member having first and second ends mounted to a surface of the tension mask along its borders. A substantial portion of the elongated strip member located between the first and second ends lies in frictional contact with the tension mask to receive vibrations induced in the mask.

Abstract: Due to a slit formed in the dead space, a cathode ray tube capable of preventing incorrect hitting of color electron beams caused by the local doming phenomenon from occurring and thus preventing displacement of colors, unevenness in colors, and deterioration of luminance from occurring is provided. The cathode ray tube comprises a shadow mask having an effective area where lines of apertures for passing electron beams are arranged and a dead space formed on both outer sides of the effective area. In the dead space, a slit extending along the lines of the apertures is formed. Accordingly, the thermal expansion of the dead space caused by a temperature increase can be reduced, and the stress applied to the aperture line of the effective area adjacent to the dead space can be suppressed. As a result, the local doming phenomenon can be prevented from occurring.

Abstract: The invention provides a color cathode ray tube using a shadow mask capable of avoiding ruptures or cracks during press-working. The shadow mask has an apertured region having color selecting apertures, and an unapertured region which surrounds the apertured region. A skirt portion is bent from the unapertured region in the direction of the tube axis. The shadow mask has at least two inclined surfaces in a boundary portion between the unapertured region and the skirt portion.

Abstract: Notches formed in a skirt portion of a shadow mask include a plurality of first notches formed at long side and short side skirt portions and respectively forming first tongue portions at substantially central portions of the respective long side and short side skirt portions, and second notches formed as pairs so as to sandwich respective corner portions of the skirt portion and respectively forming second tongue portions. At the respective corner portions of the skirt portion, assuming that a length from a peripheral edge of a mask surface to welding points of the respective second tongue portions is Lwd, and a length from the peripheral edge of the mask surface to a distal end of at least one second notch is Lcd, Lcd and Lwd have a relationship of Lcd≦Lwd≦2Lcd.

Abstract: A tension mask frame assembly for a color cathode-ray tube, the assembly including a tension mask and a frame, is provided. The tension mask has a plurality of strips isolated from each other at predetermined intervals on a thin plate to form slots, and tie bars for partitioning slots at a predetermined pitch interval by connecting adjacent strips to each other. The frame has a pair of support members for supporting the longer sides of the tension mask, a pair of elastic members, the ends of which are connected to both ends of each of the support members so that the support members are isolated from each other a predetermined distance, and a reinforcing member having both ends coupled to both ends of the exterior side surface of each of the support members and its center portion contacting with the exterior side surface of each of the support members, the reinforcing member for elastically restoring the support members in a direction where a tensile force is applied to the strips.

Abstract: A shadow mask support frame for a color cathode ray tube has a rectangular shape overall comprises two end uprights and two lateral uprights. The lateral uprights have a straight main part and two end parts each connected by at least one joining portion to an end upright. The lateral uprights have axes parallel to each other situated in a plane parallel to a reference plane of the frame. Each of the joining portions is in contact through a lateral face with an internal face of a substantially flat wall perpendicular to the reference plane of the frame, so that the end uprights of the frame are in abutment on the joining portions.

Abstract: A cathode ray tube includes a panel having a front screen portion on which a phosphor screen is formed and a panel flange formed on an edge of the front screen portion; a funnel connected to the panel flange; a deflection yoke disposed around the funnel; a neck connected to the funnel, an electron gun disposed in the neck; a color selection apparatus for selecting electron beams emitted from the electron gun and allowing the selected electron beams to land on corresponding phosphors, the color selection apparatus including a frame having a pair of supporting members disposed at a predetermined distance from each other in parallel and a pair of elastic members fixed on both ends of the supporting members to correspond to the lateral sides of the mask; and a shield apparatus for shielding geomagnetism, the shield apparatus being mounted on a circumference of the frame of the color selection apparatus and extended toward the neck.

Abstract: A cathode-ray tube having a luminescent screen on a faceplate panel and a tension mask assembly, wherein the assembly comprises a pair of support blades for supporting a tension mask. The tension mask has a pair of mask borders each being fixed to a respective support blade and a plurality of strands extending between the mask borders. The mask further comprises cross wires extending generally perpendicular to the strands on a screen facing side and at least one shield assembly extending between and attached to the mask borders. The shield assembly has a sheath extending along one side of the mask in contact with at least one strand and a shield attached to the cross wires of the mask in overlapping relation to the sheath.

Abstract: An apparatus and method for terminating crosswires on a tension focus mask. The apparatus includes a set of base segment side rails each having a length and two respective ends. A pair of square tubes attached perpendicular to the respective ends of said base segment side rails to substantially form a rectangle. Also included are a pair of massive side rails having a length and two respective ends mounted above said base segments perpendicularly to said square tubes on each of the side rapid. Beam shield is offered to the massive side rail and insulating members are sandwiched between the side rail and a bus bar. Finally, a tension mask is attached and crosswires are laid and affixed to the bus bar.

Abstract: A method for making a shadow mask array is taught comprising the steps of producing a plurality of shadow mask sections; inspecting the plurality of shadow mask sections to determine which shadow mask sections are acceptable as meeting predetermined criteria; positioning a predetermined number of the acceptable mask sections into predetermined locations relative to one another to form a mask section array thereby distributing any error in individual mask sections across the mask section array; and attaching the individual mask sections of the mask section array to a support structure. The support structure allows for expansion and/or contraction of the individual mask sections of the mask section array while maintaining relative positioning of the individual shadow mask section in the shadow mask array.

Abstract: A cathode ray tube comprises a color selection electrode with a shadow mask fixed to a frame and put under tension. The frame comprises a bimetal element (or bimetal elements) which are constructed such that at a raised temperature the tension is released by reducing the distance between sides of the frame to which the mask is attached. The reduction in distance at the center of the sides exceeds, preferably by a factor 1.5 to 3, the reduction in distance at the corners of said sides.

Abstract: A lightweight cathode ray tube is formed by reducing a cross-sectional area on the apeture grill tapes in the aperture grill. One exemplary embodiment of the reduced cross-sectional area aperture grill tape includes a central longitudinal channel in a side of the aperture grill tape that faces away from the screen. The reduction in cross-sectional area reduces a linear density of the tape thereby decreasing the tension required by the frame. As each of the aperture grill tapes includes this central longitudinal channel, the weight of the overall aperture grill is significantly reduced and the aperture grill frame weight is reduced due to the lower aperture grill tension. A method for producing the reduced cross-sectional area aperture grill tape is possible without significantly increasing the cost of manufacturing the aperture grill tape.

Abstract: The present invention provides an improved tension mask frame assembly 10 in which mask support members 40 are provided with side walls 42, 46 and a back wall 44 that are held together primarily by means of either tabs formed along an edge of the back wall 48 received into respective apertures 50 in the side wall 42 or by means of a ridge 69 formed in the side wall 62 which abuts the back wall 64.

Abstract: In the manufacturing process of a color display tube (1), the display window (3) is assembled with the funnel shaped part (4) in a furnace by subjecting them to a heat treatment. This heat treatment can lead to deformation of the color selection electrode (12), because in color display tubes (1) with an invar shadow mask (13), the diaphragm parts (15) are made from invar as well, while the corner sections (16) are made from iron in order to obtain enough stiffness. The difference in expansion coefficient between invar and iron leads to shearing of the welds (22) that connect the diaphragm parts (15) to the corner section (16). To overcome this problem the invention proposes to provide the diaphragm parts (15) with slits (23) or impressions (24), which are arranged so that no stress occurs between the spot welds (22) when the color selection electrode (12) is heated.

Abstract: A tension mask frame assembly of a color CRT includes a tension mask in which a plurality of electron beam passing holes are formed and a frame. The frame includes a pair of first and second support members separated a predetermined distance from each other and supporting the tension mask so that a tensile force is applied to the tension mask. First and second elastic members are installed between both end portions of each of the first and second support members, supporting the first and second support members to be separated a predetermined distance from each other to compensate for an amount of thermal expansion of the tension mask, and having inclined portions inclined at a predetermined angle.

Abstract: A color picture tube (10) has a tensioned mask (24) supported by a support frame (28) mounted within the tube. The mask has a significantly lower coefficient of thermal expansion than the frame. Intermediate members (48) are located between the mask and the frame. The intermediate members are of a material having a coefficient of thermal expansion similar to that of the mask. The frame has elongated tabs (46) extending therefrom. Each of the tabs is attached at one end thereof to the remaining portion of the frame. The distal ends of the tabs are welded to the intermediate members.

Abstract: A color cathode-ray tube 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 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 partially or slightly conductive to an extent sufficient to prevent an accumulation of a significant electrical charge.

Abstract: A color cathode-ray tube (CRT) having an evacuated envelope with an electron gun therein for generating at least one electron beam is disclosed. The envelope further includes a faceplate panel having a luminescent screen with phosphor lines on an interior surface thereof. A tension focus mask, having a plurality of spaced-apart first electrodes, is located adjacent to an effective picture area of the screen. The plurality of spaced-apart first electrodes has a screen-facing side having a predetermined width and a relatively wider electron-gun-facing side. Each side forming sharp corner edges extending along the length of each first electrodes. A substantially continuous insulating material is deposited on the screen-facing side and on the corners of the first electrodes to shield the sharp corner edges of the first electrodes. A plurality of second electrodes are oriented substantially perpendicular to the plurality of first electrodes and are bonded thereto by the insulating material layer.

Abstract: A color display tube (1) is disclosed having an improved suspension system of the color selection electrode (12). The positional stability of the color selection electrode (12) is of eminent importance for the color purity of the color display tube (1). If the color selection electrode (12) slightly shifts, the electron beams (7,8,9) may impinge on electroluminescent material of the wrong color, leading to discolorations. It is recognized that this positional stability is improved by applying free end portions (22) of a smaller diameter on the supporting elements (17) because this will lower the friction between the free end portions (22) and the suspension means (20). This smaller diameter has the disadvantage that the insertion of the color selection electrode (12) into the display window (3) of the color display tube (1) becomes more difficult. This invention solves this problem by applying free end portions (22), which are provided with a centering tip (44).

Abstract: The present invention relates to a getter placement and attachment assembly for securing and placement of the getter along the major axis of a CRT. The getter placement and attachment assembly includes a getter spring for removably securing the getter to an internal magnetic shield affixed to the frame of the color selection electrode or mask frame of a CRT. The internal magnetic shield has sidewalls enclosures with a plurality of apertures therethrough along the major axis of the CRT to permit optimum deposition of a getter film within the CRT.

Abstract: A tension mask frame assembly for use in a cathode ray tube is provided. The tension mask frame assembly includes a substantially rectangular mask support frame, having a first coefficient of thermal expansion. The frame is formed of a pair of opposing long sides being joined to a pair of opposing short sides wherein one of these pairs has an attachment zone. The tension mask, having a second coefficient of thermal expansion, is supported by the frame at the attachment zones along the opposing sides. The attachment zones are formed of a material having a coefficient of thermal expansion which is approximately the same as the second coefficient of thermal expansion in order to be matched with the tension mask.

Abstract: A color cathode ray tube includes a generally rectangular shadow mask structure in which a skirt portion of a shadow mask is secured to a support frame. The shadow mask is formed by an apertured portion having a large number of electron beam transmission apertures, an imperforate portion disposed around the entire periphery of the apertured portion, a skirt portion being bent back and drooping from the entire periphery of the imperforate portion, and a support frame including a rectangular frame portion. The skirt portion of the shadow mask is secured to the inside of the rectangular frame portion, and a bent portion of the shadow mask, which defines a transitional region between the imperforate portion, and the skirt portion is formed in a shape where long sides are recessed inwardly and ends of the long sides of the skirt portion come into contact with the frame portion.

Abstract: A color selection apparatus for a cathode ray tube includes a tension mask including a plurality of electron beam passage apertures; and a frame including a pair of support members provided along opposite sides of the tension mask and applying a tensile force to the mask, and a pair of elastic members extending from one support member to the other at ends of the same, the elastic members maintaining a predetermined distance between the support members. Each of the elastic members is hollow and includes a base that is substantially parallel to the tension mask, with extensions formed substantially perpendicular to the base at both ends thereof, and bending portions integrally formed between the base and the extensions. Reinforcing elements are formed in proximity to the bending portions to increase the strength of the elastic members in the area of the bending portions.

Abstract: In a shadow mask for a color cathode ray tube including a plurality of slots in which electron beams pass, a roughly rectangular-shaped effective surface having long sides and short sides and a skirt portion downwardly curved-extended from the outer surface of the effective surface, wherein a horizontal pitch at the central portion of a shadow mask satisfies a condition of W×0.08%≦Pho≦W×0.086% when a horizontal pitch at the central portion of a shadow mask slot is Pho, a screen effective surface long side length is W and the shadow mask central portion is placed on the center in which the shadow mask effective surface long side is divided into three equal parts. In addition, the shadow mask satisfies a condition of Pho×0.24≦Sw≦Pho×0.30 when a slot horizontal width at the shadow mask central portion is Sw.

Abstract: Colour cathode-ray tube comprising a colour selection mask (8) placed on a metal frame (19), the said frame comprising, on at least two opposite sides, means of damping vibrations of the mask, of the type comprising two masses (51) connected to the surface of the frame by a connection having a mechanical clearance between the facing surfaces of the mask and of the frame.

Abstract: A color cathode ray tube comprising a panel having a substantially flat outer surface, a funnel mounted on a rear side of the panel, a shadow mask including a plurality of electron beam through holes, and a mask frame for supporting the shadow mask, said mask frame satisfying the following condition: d/v≧0.9, d/h≧0.9 wherein d is a height of a center of a diagonal portion of the mask frame, h is a height of a center of a short side portion of the mask frame, and v is a height of a center of a long side portion of the mask frame.

Abstract: A color selection apparatus includes a frame comprising a pair of supporting members disposed in parallel with each other and a pair of elastic members disposed between and coupled to the supporting members. Each of the elastic members is formed of a hollow tube. A mask is coupled to the supporting members while being applied with a predetermined tension, and exhaust openings are formed for exhausting remaining alien substances from within the elastic members during an assembling process of the color selection apparatus. The exhaust openings are formed on each of the elastic members at a portion adjacent to where the elastic members are coupled to the supporting members.

Abstract: A cathode ray tube comprising: a panel; a funnel engaged to the panel for forming a vacuous space; and a shadow mask supported in the cathode ray tube by being fixed to a mask frame and including an effective surface having a plurality of electron beam passing holes at a center thereof, an ineffective surface formed at a periphery of the effective surface and not having the electron beam passing holes and a skirt portion extended from the ineffective surface towards a vertical direction thereof and welded to the mask frame. In the cathode ray tube, a slot of a predetermined size is formed between welding points by which the skirt portion is welded to the mask frame, and a height of the slot from an end of the skirt portion is higher than that of the welding points, thereby reducing a doming effect of the shadow mask, reducing a mis-landing which the electron beam does not land to a precise landing point, and thus preventing a color purity of a screen from being deteriorated.

Abstract: The invention provides a CRT having a funnel sealed at one end to a faceplate panel with a luminescent screen on an interior surface thereof, a mask assembly supported within the CRT and in proximity to the screen, the faceplate panel having a plurality of peripheral sidewalls each having an inside surface. The CRT also includes a plurality of studs, with at least one stud affixed in each of the corners of inside surface of the sidewalls. A plurality of springs engage the corner studs, to support the mask assembly within the CRT; at least one additional stud is affixed along the inside surface of one sidewall and a shim is attached around the additional stud. On the mask assembly at least one bracket is positioned to have a slot into which the shim is loosely engaged, thereby mitigating motion in a plane parallel to the interior sidewall.

Abstract: In color display tubes (1) with a dotted shadow mask (13) structure and an in-line electron gun (10), the geometry of the screen (6) and the deflection field produced by the deflection unit (11) cause triad rotation, which is a rotation of the three phosphor dots (red, green and blue) corresponding to one aperture of the shadow mask (13) with respect to the horizontal scan lines (35). This problem can be solved by giving the horizontal lines (35) a curved shape. However, in the prior art situation a parabolic shape is used, leading to severe moiré problems, because the vertical pitch asv (38) is influenced too strongly at the vertical screen edges. This problem can be overcome by using fourth order or even sixth order terms in the shape of the horizontal lines (35). A pure fourth order function reduces the vertical pitch asv 38 variation by 50% with respect to the parabolic prior-art situation, and a pure sixth order function even leads to a reduction by 67%.

Abstract: To realize a press mask having a large radius of curvature by making the press mask correct a doming by itself, as material which constitutes a shadow mask, a single plate body which is formed of a composite gradient alloy plate having a concentration gradient of an alloy element which is continuously and gradually decreased from a phosphor-screen-side surface to an electron-gun-side surface is used.

Abstract: Cathode-ray tube (1) comprising a frame/mask assembly for selecting colors having a mask (8) and a frame (19), the mask being held under tension by being attached to ends of long sides (9) of the frame, the frame/mask assembly being suspended inside the tube using support means (10) which are able to increase the mechanical rigidity of the frame by support means having longitudinal dimples (40) which cause the long sides of the frame to come together during the high-temperature manufacturing phases.

Abstract: A cathode ray tube comprising a color selection electrode supported in tension. The electrode includes a circumferential portion on which vibration damping means are located for damping vibrations in the color selection electrode. The vibration damping means include a resonator in the form of at least one metal tongue, which is capable of vibrating when the color selection electrode vibrates. The tongue is arranged in, or substantially parallel to, the plane of the color selection electrode. Means are provided to exchange vibration by means of collision and/or friction between the circumferential portion of the color selection electrode and the tongue.

Abstract: A shadow mask for a color cathode ray tube provided which includes an effective surface part having a plurality of slots formed therein for passing electron beams, and an edge part extended from the effective surface part and welded to a frame fitted to a panel in a cathode ray tube. The shadow mask is tensed in any one of an x- and y-axis directions. An interval of welding spots on the edge part is fixed according to a thickness of the shadow mask and a pitch of slots of the shadow mask. The interval of welding spots is in a range of approximately 11 to 15 times the thickness of the shadow mask. The welding spots on the edge part has an aspect ratio in a range of approximately 1.0 to 2.6.

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 tension mask assembly for a color cathode-ray tube includes a tension mask including a plurality of strips separated a predetermined distance from each other to form slots, a plurality of bridges connecting the strips to section the slots, and a plurality of holes formed in each of short side portions of the tension mask, a frame including first and second support members supporting both long side portions of the tension mask to apply a tension force to the strips of the tension mask, and at least a pair of elastic members supporting the first and second support members, and a plurality of vibration attenuation units coupled to the holes formed at both short side portions of the tension mask to attenuate vibrations of the tension mask.

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: 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 mask frame comprises a sidewall portion in the form of a rectangular frame including a pair of long sidewalls opposed to each other, a pair of short sidewalls opposed to each other, and corner sidewalls between the long and short sidewalls, and a base portion extending from the sidewall portion toward the center of the rectangular frame. The base portion has beads located near the corner sidewalls and connecting the long and short sidewalls.