Abstract: A cathode ray tube includes a tube having a panel having an inner phosphor screen, a funnel connected to the panel, a neck connected to the funnel, a deflection unit disposed around the funnel, an electron gun installed in the neck, and a scatter-proof unit installed on the panel and the funnel such that the panel shares the scatter-proof unit with the funnel for preventing the tube from breaking and scattering into many pieces.

Abstract: A shadow mask for a cathode ray tube is formed with a curved surface such that a radius of curvature corresponding to a perpendicular axis which passes through the center of the shadow mask decreases monotonely along the perpendicular axis from the center of the shadow mask and a radius of curvature corresponding to a parallel axis which passes through the center of the shadow mask decreases monotonely along the parallel axis from the center of the shadow mask. The curved surface satisfies the following condition, [0.1RVmin+0.9RVmax, 0.9RVmin+0.1RVmax]?[RHmin, RHmax]. RVmin and RVmax respectively represent the minimum and the maximum value of the minimum radius of curvature corresponding to the perpendicular axis, and RHmin and RHmax respectively represent the minimum and the maximum value of the minimum radius of curvature corresponding to the parallel axis.

Abstract: A mask assembly for a Cathode Ray Tube (CRT) includes a shadow mask with a plurality of beam passage holes, and a frame including a supporting portion with a pair of long sides and a pair of short sides which fix the shadow mask and a strength maintenance portion bent from the supporting portion. The frame includes a plurality of reinforcement indentations formed on a portion of the boundary between the supporting portion and the strength maintenance portion. At least one of the reinforcement indentations satisfies the following condition: S 1 3 ? S 2 ? 2 3 ? S 1 wherein S1 represents an area of a triangle defined by a width of the supporting portion including the reinforcement indentation, a width of the strength maintenance portion including the reinforcement indentation and an imaginary line connecting an end of the supporting portion and an end of the strength maintenance portion, and wherein S2 represents a sectional area of the reinforcement indentation.

Abstract: A mask assembly for a Cathode Ray Tube (CRT) includes a shadow mask with a plurality of beam passage holes, and a frame including a supporting portion with a pair of long sides and a pair of short sides which fix the shadow mask and a strength maintenance portion bent from the supporting portion. The frame includes a plurality of reinforcement indentations formed on a portion of the boundary between the supporting portion and the strength maintenance portion. At least one of the reinforcement indentations satisfies the following condition: S 1 3 ? S 2 ? 2 3 ? S 1 wherein S1 represents an area of a triangle defined by a width of the supporting portion including the reinforcement indentation, a width of the strength maintenance portion including the reinforcement indentation and an imaginary line connecting an end of the supporting portion and an end of the strength maintenance portion, and wherein S2 represents a sectional area of the reinforcement indentation.

Abstract: A tension mask frame assembly for a color CRT includes a pair of first and second support members separated a predetermined distance from each other, first and second elastic members installed at end portions of the first and second support members to support the first and second support members, a tension mask installed at the first and second support members such that a tensile force is applied to the first and second support member and having a plurality of electronic beam passing holes formed therein, and a compensation portion installed at the end portions of the first and second support members to make the tensile force applied to the tension mask after heat treatment distributed such that tension at a central portion is greater than that at a surrounding portion.

Abstract: A cathode ray tube includes a tube having a panel having an inner phosphor screen, a funnel connected to the panel, a neck connected to the funnel, a deflection unit disposed around the funnel, an electron gun installed in the neck, and a scatter-proof unit installed on the panel and the funnel such that the panel shares the scatter-proof unit with the funnel for preventing the tube from breaking and scattering into many pieces.

Abstract: A shadow mask for a cathode ray tube is formed with a curved surface such that a radius of curvature corresponding to a perpendicular axis which passes through the center of the shadow mask decreases monotonely along the perpendicular axis from the center of the shadow mask and a radius of curvature corresponding to a parallel axis which passes through the center of the shadow mask decreases monotonely along the parallel axis from the center of the shadow mask. The curved surface satisfies the following condition, [0.1 RVmin+0.9RVmax, 0.9RVmin+0.1RVmax]?[RHmin, RHmax]. RVmin and RVmax respectively represent the minimum and the maximum value of the minimum radius of curvature corresponding to the perpendicular axis, and RHmin and RHmax respectively represent the minimum and the maximum value of the minimum radius of curvature corresponding to the parallel axis.

Abstract: An implosion preventing band for a cathode ray tube includes a main band formed around an outer surface of a skirt of a face panel, and including a pair of long sides provided on opposite sides of the skirt in a direction corresponding to long sides of a screen, a pair of short sides provided on opposite sides of the skirt in a direction corresponding to short sides of a screen, and corners formed between the long sides and the short sides to interconnect the same; and degaussing coil supports formed raised from the main band on long and short sides of the main band, and each having formed one or more openings that allow passage in a direction of a width of the main band, a degaussing coil(s) being supported using the openings. A plurality of the openings is formed continuously in the degaussing coil supports in a circumferential direction of the main band.

Abstract: A shadow mask includes an aperture area having a plurality of apertures through which electron beams pass; a non-aperture area extending a from a circumference of the aperture area; and a skirt formed extending from an outer circumference of the non-aperture area at a predetermined angle, wherein the front surface of the aperture area is formed satisfying the following conditions, 100%<RMV?/RMV<110% 120%<RMS/RMV?<150% where RMV is a vertical radius of curvature of the front surface of the aperture area with respect to a vertical direction passing through a center of the aperture area, RMS is a vertical radius of curvature with respect to a short side of the aperture area, and RMV? is a vertical radius of curvature of the front surface of the aperture area with respect to the vertical direction at a location on a horizontal axis passing through the center of the aperture area.

Abstract: A shadow mask includes an aperture area having a plurality of apertures through which electron beams pass; a non-aperture area extending a from a circumference of the aperture area; and a skirt formed extending from an outer circumference of the non-aperture area at a predetermined angle, wherein the front surface of the aperture area is formed satisfying the following conditions,

Abstract: A tension mask frame assembly for a color CRT includes a pair of first and second support members separated a predetermined distance from each other, first and second elastic members installed at end portions of the first and second support members to support the first and second support members, a tension mask installed at the first and second support members such that a tensile force is applied to the first and second support member and having a plurality of electronic beam passing holes formed therein, and a compensation portion installed at the end portions of the first and second support members to make the tensile force applied to the tension mask after heat treatment distributed such that tension at a central portion is greater than that at a surrounding portion.