Abstract: An electron gun for a color CRT includes a main focusing lens unit that focuses the electron beams generated by a triode unit. The main focusing lens unit includes a first and a second electrostatic screen grid having three electron beam through holes linearly-arranged for passing three electron beams, two of the holes being external and an oval shaped hole that passes all three electron beams. The oval shaped holes being spaced a distance, d1 and d2, respectively, from the through holes. Furthermore, the first grid external holes have an external distance HL1 and an internal distance HR1 and the second grid external holes have an external distance HL2 and an internal distance HR2; and wherein HL1 is greater than HR1, HL2 is greater than HR2, d1 is greater than d2, HL2 is greater than HL1, and HL2+HR2 is greater than HL1+HR1.

Abstract: A cathode ray tube is disclosed, in which a shadow mask satisfies the following condition: Rx<1200 mm or Ry<1200 mm, and further satisfies the following condition: 0<Rd<3000 mm or Rd <?1500. The structural strength of the shadow mask is increased, thereby greatly improving thermal distortion and vibration problems of the shadow mask as well as greatly improving the qualities such as the drop characteristic, doming characteristic and inner pin distortion problem.

Abstract: Disclosed are a cathode ray tube and a funnel therefore. An anode button is installed on the funnel to meet the condition of 2.8?T, in which T is a B/A ratio, A is a distance on a central axis of the funnel between a seal edge face of the funnel, which abuts a panel, and the anode button, and B is a distance on the central axis of the funnel between the anode button and a neck seal of the funnel, which is positioned at the opposite side of the seal edge face in the funnel. According to this invention, it is possible to prevent mechanical interference and electrical interference, such as distortion of deflection magnetic field, caused depending on the installation position of the anode button on the funnel.

Abstract: A cathode ray tube comprises a panel having a fluorescent formed on an inner surface thereof; a funnel connected to the panel; an electron gun housed in the funnel emitting electron beams; a deflection yoke for deflecting the electron beams in horizontal and vertical directions; a shadow mask for selecting colors of the electron beams; and a mask frame for supporting the shadow mask, in which an outer surface of the panel is substantially flat and an inner surface has a designated curvature, and a radius of curvature from a center of the shadow mask in a major-axis, minor-axis and diagonal-axis direction is substantially same.

Abstract: A cathode ray tube includes a panel, a funnel and a funnel yoke portion having a non-circular-shaped vertical section. When a diagonal portion thickness on a certain vertical section between a reference line and a neck line is Td and a long side portion thickness at the same vertical section is Th, a glass structure of a cathode ray tube satisfies 0.5<Th/Td<1.01. When a diagonal portion thickness at a top round is Dt?, a long side portion thickness is DS?, a short side portion thickness is DL?, a diagonal portion thickness at a reference line is Dt, a long side portion thickness is DS, and a short side portion thickness is DL, then the glass structure of a cathode ray tube satisfies 1.3?Dt?/Dt<1.80.

Abstract: Disclosed herein is a panel of a slim cathode ray tube constructed such that the deflection angle of an electron beam is 110 degrees or more. The slim cathode ray tube includes a tube part constituted by joining the panel and a funnel with each other. The panel includes a face part, a side wall disposed around the face part such that the side wall is bent toward the funnel, and a seal edge formed at the side wall, the panel being joined with the funnel at the seal edge. On the assumption that the thickness of the center of the face part is Tc, the thickness of the long side of the seal edge is Tx, the thickness of the short side of the seal edge is Ty, and the thickness of the diagonal part of the seal edge is Td, the panel is constructed such that the following inequalities are satisfied: 0.8?Tc/Ty?Tc/Tx?1.0?Tc/Td and Td<Tx<Ty, and the side wall has an outer skirt angle of 0.5 to 1.5 degrees.

Abstract: A color CRT comprising a panel having a substantially flat outer surface and an inner surface having a certain curvature, and a mask having a plurality of electron beam passing holes, wherein an effective surface diagonal size of the panel is not greater than about 534 mm, wherein a central portion transmittance rate is within the range of about 45–75%, wherein the panel satisfies the condition 1.1?(Rxs/Ryc)?4.6, wherein Rxs is defined as an inner curvature radius along an edge of a longer side of the panel, and wherein Ryc is defined as an inner curvature radius along a line in the center of the panel parallel to the shorter side of the panel.

Abstract: Disclosed is a cathode ray tube, comprising a panel of which outer surface is substantially flat and inner surface has a designated radius of curvature, a funnel connected to the panel, an electron gun housed in the funnel, emitting electron beams, a deflection yoke for deflecting the electron beams, and a shadow mask for discriminating the electron beams in colors, wherein a ratio (%) of a corner portion of the panel to a thickness at a central portion of the panel is in a range of 150%˜230%, and design sizes of the panel satisfy a relation of CFT × USD IBRD × 100 ? 1100 ? ? mm (wherein, CFT denotes a thickness at the central portion of the panel, USD denotes a diagonal length of an effective surface of the panel, and IBRD denotes 2×a distance from the center of the panel to the center of a radius of curvature from the corner portion of the panel).

Abstract: Disclosed herein is an inner shield for slim cathode ray tubes. On the assumption that the linear distance from an electron beam deflection center of a tube part to the plane formed by a seal edge of a panel is L, the height of the inner shield is Sh, the length of the major axis of an opening of the inner shield is Dx, the length of the minor axis of the opening is Dy, the short side bent angle is S?, the long side bent angle is L?, and the deflection angle is D?, the inner shield is constructed such that the following inequalities are satisfied: 2<L/Sh<3.5, 1.6<Dx/L<3.5, 1.0<Dy/L<2.5, 2.5<D?/S?<6.5, and 1.0<D?/L?<3.0. Furthermore, on the assumption that the area of a large opening ?, and the area of a small opening is ?, the ratio in area of the large opening to the small opening is set such that the following inequality is satisfied: 5.5>?/?>5.0.

Abstract: A cathode ray tube with a panel includes an inside surface having a designated curvature; a central portion having a transmission rate of 45–75%; and an outside surface being substantially flat with a flatness ratio (F) satisfying a mathematical formula of F = Ro Sd × 1.767 , where Ro denotes a diagonal curvature radius of the outside surface, Sd denotes a diagonal length of an effective surface of the panel, and the flatness ratio (F) of the outside surface is greater than 17. The dimensions of the panel are such that the thickness at the central portion of the panel (CFT), the thickness of a vertical axis end (Tv), and the thickness of a diagonal end (Td) satisfy conditions of 1.4<Td/CFT<2.2, and 0.85<Tv/Td<1.0.

Abstract: Disclosed herein is a shadow mask for cathode ray tubes. When the width of a smaller hole part of each of slots formed at the shadow mask is defined as Sw, the horizontal distance between the end of a taper-shaped larger hole part facing the panel side of each of the slots, which is adjacent to the edge part of the shadow mask, and the end of the smaller hole part, which is adjacent to the edge part of the shadow mask, is defined as Ta, and the incident angle at which the electron beam passes through each of the slots is defined as ?, the shadow mask has at least one slot through which the electron beam passes at an incident angle ? of above 47 degrees, and the at least one slot through which the electron beam passes at an incident angle ? of above 47 degrees is configured such that the following inequality is satisfied: 1<Ta/Sw<2.

Abstract: A cathode ray tube comprises a panel having a fluorescent formed on an inner surface thereof; a funnel fastened to the panel; an electron gun housed in the funnel, emitting electron beams; a shadow mask for selecting colors of the electron beams; a mask frame for supporting the shadow mask; and a mask spring for coupling the mask frame to the panel, wherein the mask spring is comprised of an fastening portion welded to the mask frame, a attaching portion attached to the panel, and a connecting portion for connecting the fastening portion with the attaching portion, and elongated embossments are formed on a bending portion formed between the fastening portion and the connecting portion.

Abstract: A color cathode ray tube is provided in which an inner radius of curvature is designed as 0.3?(Rxe/Rxc)?0.5, to obtain a structural intensity of a panel mask corresponding to the inner curvature of the cathode ray tube panel to decrease partial doming and increase a drop characteristic.

Abstract: The present invention relates to a cathode ray structure for a cathode ray tube, and more particularly, to a cathode structure for a cathode ray tube capable of maximizing thermal efficiency and minimizing power consumption.

Abstract: A color cathode ray tube comprising a panel, said panel including an outer surface which is substantially flat and an inner surface on which a screen composed of red, green and blue phosphors is formed, wherein a screen transmittance of the panel increases and then decreases along a line from a center portion to a peripheral portion of the panel, thus to improve brightness uniformity of a center portion, a peripheral portion and a doming portion of the panel.

Abstract: A flat color cathode ray tube having excellent doming quality is obtained by improving the structure of a flat panel and by using a shadow mask made of AK (aluminum-killed) material. According to the cathode ray tube, an outer surface of a panel used for the cathode ray tube is substantially flat, and an inner surface thereof has a curvature, and a transmittance ratio of ending portion of an effective surface to central portion of the panel is in the range of 0.4 to 0.6, and the radius of diagonal curvature (Rd) of the inner surface of the panel is in the range of 1.29R to 4.35R (R=1.767×diagonal length of effective surface), and a shadow mask is made of AK material. The cathode ray tube embodying the principles of the present invention is very advantageous in that it has a price as low as half the price of the conventional cathode ray tube, yet its panel uses a shadow mask made of AK material which has a doming quality equivalent to that of a shadow mask made of Invar material.

Abstract: A rail of a flat type cathode ray tube is disclosed, wherein the flat type cathode ray tube comprises a panel having a deposited fluorescent surface therein and of which interior and exterior surfaces are substantially flat, a funnel connected to the panel; a shadow mask arranged with the inner surface of the panel with a predetermined gap, and a rail fixed to the panel and combined with the shadow mask. In the flat type cathode ray tube, if a height of the rail is L, the rail maintains a predetermined gap of 0.1L˜0.3L with the panel and is fixed by a frit glass.

Abstract: A holder for a cathode ray tube includes a stud engaging portion having an engaging hole in order to be engaged to a stud pin mounted inside a panel, a frame engaging portion engaged to a mask frame which supports a shadow mask, and a connecting portion for connecting the stud engaging portion and the frame engaging portion. Lower end surfaces of a pair of holders are arranged facing toward each other so that the lower end surfaces of the connecting portion are in substantial contact with each other.

Abstract: A frame for a cathode ray tube including a panel formed with a blend region outside an effective screen of the panel, the blend region having an outer surface curvature having a radius satisfying a condition “20?Rb?60 (mm)” where “Rb” represents the outer surface curvature radius, so that it is possible to reduce the weight of the panel without causing a degradation in picture quality, and thus, to reduce manufacturing costs. It is also possible to reduce damage of the panel when the panel is processed in a furnace, and thus, to achieve an enhancement in productivity.

Abstract: A cathode ray tube is mounted with a reinforcing band for improving landing stability of electron beams and howling of shadow mask and reinforcing an explosion-proof function.