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: 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: The present invention relates to a cathode ray tube and more specifically to a cathode ray tube having a glass structure which minimize a stress according to a cathode ray tube of slim type.

Abstract: A home networking communication system and method for communicating using the same is disclosed, which includes a main apparatus for controlling a plurality of networked peripheral apparatuses in the house by inputting a control signal from outside, and for outputting state information of the controlled peripheral apparatuses, an external apparatus for inputting control signals for controlling the plurality of peripheral apparatuses from a long distance, and web server for transmitting the control signal input from the external apparatus to the main apparatus by Internet, and for receiving the state information of the peripheral apparatuses according to the transmitted control signal, storing, monitoring the same and providing the same to the external apparatus.

Abstract: The present invention relates to a color cathode ray tube having a spring structure capable of compensating for the displacement of a shadow mask frame, thereby suppressing the degradation of the color purity according to the mislanding of electron beams. The spring according to the present invention includes a stud pin coupling part, a frame welding part and an inclined part as an elastic support body having a predetermined inclination angle between the stud pin coupling part and the frame welding part. Further, the spring is bonded to a plurality of metal members that have different thermal expansion coefficients, while being separated from each other in a length direction of the spring relative to a tube shaft.

Abstract: A panel for a flat screen type CRT includes an internal curvature portion wherein a screen effective surface is formed, and a skirt portion extended rearwardly from an edge of the internal curvature portion. Where Rs is the radius of curvature at an inner side of a corner of a seal edge portion in the skirt portion and Rx, Ry, and Rd are respectively the radii of blend curvature of a long-side portion, a short-side portion and a corner portion in a part where the internal curvature portion and skirt portion meet, the relations 0.4<Rd/Rs<0.6, 1≦Rx/Rd≦4, and 1≦Ry/Rd≦2 are satisfied, whereby the size of the screen effective surface area can be increased compared to that of a CRT of the same size.

Abstract: In a vacuumized cathode ray tube consisting of a panel and a funnel and including 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 of 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, a short side portion thickness is DL; a glass structure of a cathode ray tube satisfies 1.3≦Dt′/Dt<1.80. Accordingly, because a deflection efficiency and a BSN margin can be simultaneously improved, it is possible to slim down a cathode ray tube, reduce a power consumption thereof and improve a quality and a productivity thereof.

Abstract: In a color cathode ray tube, by optimizing an outer radios of curvature, an inner radius of curvature on a corner portion, a thickness of a long side, a thickness of a short side, a thickness of the corner portion, the total length of the panel, the total length of the funnel body and the total length of a yoke portion of the funnel determining a section shape of the yoke portion of the funnel, a stress concentrated on the yoke portion can be lowered. In addition, according to the increase of an inner radius of curvature of the corner portion of the yoke portion, a crash phenomenon of an electron beam is decreased, and an impact resistance and productivity improvement in fabrication process can be secured by lowering a high stress occurrence on the funnel in vacuum.

Abstract: A panel for a flat screen type CRT includes an internal curvature portion wherein a screen effective surface is formed, and a skirt portion extended rearwardly from an edge of the internal curvature portion. Where Rs is the radius of curvature at an inner side of a corner of a seal edge portion in the skirt portion and Rx, Ry, and Rd are respectively the radii of blend curvature of a long-side portion, a short-side portion and a corner portion in a part where the internal curvature portion and skirt portion meet, the relations 0.4<Rd/Rs<0.6, 1≦Rx/Rd≦4, and 1≦Ry/Rd≦2 are satisfied, whereby the size of the screen effective surface area can be increased compared to that of a CRT of the same size.

Abstract: The present invention relates to a color cathode ray tube having a spring structure capable of compensating for the displacement of a shadow mask frame, thereby suppressing the degradation of the color purity according to the mislanding of electron beams. The spring according to the present invention includes a stud pin coupling part, a frame welding part and an inclined part as an elastic support body having a predetermined inclination angle between the stud pin coupling part and the frame welding part. Further, the spring is bonded to a plurality of metal members that have different thermal expansion coefficients, while being separated from each other in a length direction of the spring relative to a tube shaft.

Abstract: An apparatus for simultaneously displaying TV and PC images capable of displaying a single image selected between PC and decoded TV images in a picture tube, or alternately displaying the PC and decoded TV images for a cycle of a horizontal synchronous signal, thereby displaying the TV image and the PC image of a high resolution as a double screen.

Abstract: An image mode selecting method and apparatus for a television receiver which can display n images corresponding to n image modes on a screen utilizing a picture-in-picture (PIP) display function, so that a user can easily select an optimum image among the displayed images. According to the method and apparatus, the n images corresponding to the n image modes are displayed on the n PIP regions of the screen, respectively, by pressing an image selection key, and then the optimum image among the n displayed images can be selected by pressing a numeral key corresponding to the selected image.

Abstract: A linearity compensation circuit for a wide-screen television receiver which can uniformly compensate for a picture linearity that may be distorted due to variation of deflection current when a display mode is changed from a 4.times.3 aspect ratio (AR) to 16.times.9 AR, and vice versa. The linearity compensation circuit includes a variable linearity compensation coil which is connected to a horizontal deflection coil, and a control section for varying the inductance value of the variable linearity compensation coil according to change of the 4.times.3 AR and 16.times.9 AR display modes so as to compensate for the linearity of the picture displayed on a display screen.