Abstract: A cathode ray tube comprising a panel having a complex curvature at an outer surface of the panel such that the complex outer surface curvature satisfies a condition “ 0.5 ? Rx + Ry 2 × Rd ? 0.9 ” , where “Rx” represents a radius of the outer surface curvature of the panel along a longer axis of the panel, “Ry” represents a radius of the outer surface curvature of the panel along a shorter axis of the panel, and “Rd” represents a radius of the outer surface curvature of the panel along a diagonal axis of the panel. In accordance with this complex curvature, it is possible to reduce the weight of the panel while eliminating generation of an image distortion phenomenon and providing desired apparent flatness. It is also possible to easily design the curvature of the inner surface of the panel and the curvature of a shadow mask used in the cathode ray tube, and thus, to achieve an improvement in doming characteristics and an improvement in drop characteristics.

Abstract: A frame for a cathode ray tube including a substantially rectangular frame body having longer and shorter sides, and one or more beads formed on each of the longer frame sides, and one or more beads formed on each of the shorter frame sides, wherein at least one of the beads formed on each of the longer frame sides has a shape different from the shape of the beads formed on each of the shorter frame sides, to increase the rigidity of the longer frame side. The number of the beads formed on each of the longer frame sides may be different from the number of the beads formed on each of the shorter frame sides, to increase the rigidity of the longer frame side.

Abstract: Disclosed is a color CRT capable of obtaining the safety for an explosion by setting a band force of a reinforcing band coupled to a flat panel to be optimum, wherein a ratio of an effective surface of the panel is 4:3 and a following condition 0.0426*U2?46.848*U+14095?T*W*Yp?0.0381*U2?35.517*U+9994.1 is satisfied.

Abstract: The present invention relates to a color cathode ray tube and more specifically to a color cathode ray tube in which electron beam landing errors caused by terrestrial magnetism are corrected such that color purity is improved. The color cathode ray tube in accordance with the present invention comprises a panel having a phosphor screen formed on an inner surface thereof; a funnel joined to the panel; an electron gun generating electron beams; a frame mounted to the panel; a shadow mask mounted to the frame; and an inner shield mounted to the frame, wherein ISH/OAH is in a range of 1.8 to 3.0 wherein OAH is a height of the panel and ISH is a height of the inner shield.

Abstract: The present invention relates to a cathode ray tube, and more particularly to a cathode ray tube having a shadow mask for obviating doming phenomenon caused by thermal expansion and deterioration of color purity.

Abstract: The present invention provides A color cathode ray tube comprising: a panel having a flat outer surface and an inner surface that has a predetermined curvature; and a shadow mask, wherein B2 P2 ? B3 P3 where B1 is a length of a bridge as a distance between holes in a vertical direction at a center portion of the shadow mask; B2 is a length of a bridge as a distance between holes in a vertical direction at four corner portions of the shadow mask; B3 is a length of a bridge as a distance between holes at edge portions of the shadow mask in a direction of a long axis thereof; P1 is a vertical pitch of the holes at the center portion of the shadow mask; P2 is a vertical pitch of the holes at the four corner portions of the shadow mask; and P3 is a vertical pitch of the holes at the edge portions of the shadow mask in a direction of a long axis thereof.

Abstract: A cathode ray tube with a reduced beam spot size on a fluorescent screen is obtained by forming electron beam passing holes on the electrodes composing a triode portion of an electron gun to have horizontally and vertically asymmetric shapes.

Abstract: A cathode ray tube comprising a panel of which an outer surface is substantially flat and an inner surface has a certain curvature, and a shadow mask arranged with a certain interval from an inner surface of the panel and having a plurality of apertures through which electron beams pass, wherein the shadow mask satisfied a condition of 0.9?ZmD/(ZmX+ZmY)?1.1, in which an arbitrary point on a diagonal axis of the shadow mask is supposed to be Dr, points on a long axis and a short axis meeting with perpendiculars drawn to the long axis and the short axis from the point Dr are respectively supposed to be Xr and Yr, and intervals between the respective points Xr, Yr, and Dr and the shadow mask in a tube axis direction are respectively supposed to be ZmX, ZmY, and ZmD.

Abstract: A color cathode ray tube including: a panel having a substantially flat outer surface and an inner surface having a curvature; a funnel coupled to the panel; a deflection yoke installed at an outer surface of the funnel; and a reinforcing band installed at a skirt portion of the panel, wherein the panel and the funnel satisfy the following condition, U/U??2.5, when a diagonal size of an effective surface of the panel is U, and a tube axis directional distance from an outer surface center of the panel to a boundary portion (TOR) between a body part and a yoke part of the funnel is U?, so that in the color cathode ray tube of the present invention, a lightness and slimness of a panel can be accomplished, and in order to compensate the weak structural strength caused in this case, a reinforcing band position (h) is set in the range of 10.5 mm˜20 mm to implement an optimum tensile force.

Abstract: A cathode ray tube comprising a panel having an outer surface which is substantially flat and an inner surface which has a radius of curvature, and a shadow mask having a plurality of apertures through which electron beams pass, wherein a ratio Sh/Sv of a horizontal dimension Sh of the aperture to a vertical dimension Sv of the aperture satisfies a condition of Sh/Sv<1 at a central portion of the shadow mask, and thereby improving strength of the shadow mask. Thusly, deformation of the shadow mask caused by an external impact or the like can be minimized, and a grade of color purity of a screen can be maintained optimally.

Abstract: Disclosed is a color cathode ray tube which can effectively improve impact resistance by setting a ratio of a curvature coefficient (a/b) of the shadow mask for a long axis to be in a range of about 100,000–135,000, and by setting a ratio of a curvature coefficient (c/d) of the shadow mask for a short axis to be in a range of about 60,000–360,000. Also, in defining ratios between a curvature radius of a center portion of the shadow mask and curvature radiuses along a horizontal direction, a vertical direction, and a diagonal direction, the curvature radius decreases towards the peripheral portions of the shadow mask, thereby improving impact resistance and drop characteristics and thus effectively preventing color purity from being degraded.

Abstract: A screen composite provided on a face plate of a flat panel display device, said screen composite containing an aluminum layer and a metal layer formed on said aluminum layer for substantially reducing a halation phenomenon.

Abstract: A cathode ray tube in which an opening defined by an edge of a bottom wall of a frame has longer-axis, shorter-axis, and diagonal axis widths appropriately determined in accordance with a distance from a deflection center of a panel to an edge of a skirt of the panel, in order to eliminate problems such as an electron beam shielding phenomenon and a halation phenomenon.

Abstract: A cathode ray tube including a frame, wherein the frame includes a side wall, to which the shadow mask is welded, and a bottom wall extending from the side wall in a state of being bent inwardly of the frame, and the frame has a side wall height and a bottom wall width defined in a cross section of the frame taken along the longer axis (x), to satisfy a condition “1.29?FW_x/FH_x?1.90” where “FW_x” represents the side wall height in the cross section of the frame taken along the longer axis (x), and “FH_x” represents the bottom wall width in the cross section of the frame taken along the longer axis (x). In accordance with this frame structure, it is possible to increase the intrinsic frequency of the frame, and thus, to prevent a degradation in color purity caused by a howling phenomenon.

Abstract: A cathode ray tube having a ferrite core with a modified sectional configuration facilitates the correction of a mis-convergence along a diagonal direction of a screen, improves the efficiency with which electrons within electron beams are deflected, and is manufacturable via a simplified process.

Abstract: In a flat type color cathode ray tube, in using of a tint or a dark tint panel capable of improving contrast characteristics of a screen and reducing production processes, namely, having the conventional coating process reduction advantage, by optimizing a horizontal pitch and a transmissivity of a shadow mask and a transmissivity of a screen in order to solve a brightness balance deterioration problem at the circumference portion of the screen due to a glass transmissivity difference, it is possible to maintain inner impact resistance and howling characteristics of the shadow mask, in addition, by improving a circumference portion transmissivity of the shadow mask and a screen transmissivity, it is possible to improve a brightness balance at the circumference portion and a quality of the screen.

Abstract: A color cathode ray tube comprising a panel, an outer surface of which is flat and an inner surface of which has a designated curvature. Since the panel has a thickness (CFT) of a central portion thereof satisfying the range of 9.0 mm?CFT?10.9 mm, and a light transmittance (Tp) of the central portion thereof satisfying the range of 50%?Tp?65%, the color cathode ray tube reduces the weight of the panel and thermal damage generated in a color cathode ray tube manufacturing process, and improves brightness of the panel.

Abstract: A flat cathode ray tube comprising a panel having a substantially-flat outer surface and an inner surface having a certain curvature, a funnel coupled to a rear end of the panel to form a hollow vacuum body, an electron gun fitted in a neck portion of the funnel to emit electron beams, and a shadow mask arranged at the inner surface of the panel in a state of being spaced apart by a certain distance from the inner surface of the panel, and formed with a plurality of electron beam slots, wherein the shadow mask has a curvature satisfying, at an optional point on the shadow mask, the condition “Rh?Rv”, where “Rh” represents a shorter-axis radius of the curvature, and “Rv” represents a longer-axis radius of the curvature. Using this structure, it is possible to prevent a degradation in the structural strength of the shadow mask.

Abstract: The present invention relates to a flat panel display, and more particularly, to a flat panel display in which the main skeletal structure of a horizontal deflecting electrode is arranged in a horizontal direction to enhance structural strength and the structure of an electrode to which voltage is applied is shaped symmetric to eliminate over-converging of electron beam.

Abstract: The present invention relates to a cathode ray tube, and more particularly, to a funnel for CRT to increase the BSN neck shadow margin by changing the shape of the yoke portion.