Abstract: A cathode ray tube with a central tube axis Z includes a panel with an inner phosphor screen and a rear portion. The panel has a substantially rectangular effective screen portion with two long sides in a horizontal axis direction, two short sides in a vertical axis direction and four edges in a diagonal axis direction. A funnel is connected to the rear portion of the panel. The funnel sequentially has a body with a large-sized end and a small-sized end, and a cone portion with a large-sized end and a small-sized end. The cone portion has a thickness Th in the horizontal axis direction, a thickness Tv in the vertical axis direction and a thickness Td in the diagonal axis direction. The horizontal thickness Th, the vertical thickness Tv and the diagonal thickness Td of the cone portion of the funnel in the tube axis Z direction satisfy the following condition: Th(z)=Tv(z)>Td(z).

Abstract: A rechargeable lithium battery includes a negative electrode with a graphite-based active material with boron as a donor and a positive electrode with a transition metal oxide-based active material. A separator is interposed between the negative and positive electrodes. The positive and negative electrodes and the separator are all saturated with an electrolyte. The electrolyte contains cyclic carbonate and chain carbonate at a ratio of 51:49 by volume percent.

Abstract: A light-emitting compound and a display device adopting the light-emitting compounds as a color-developing substance. When the display device adopts an organic layer formed of the light-emitting compound, such as a light-emitting layer or an electron transport layer, as a blue light-emitting material, it can display blue and has good luminous efficiency and driving voltage characteristics.

Abstract: A cathode ray tube assembly includes a funnel having a neck, an electron gun having an electron emitter within the neck and having at least two focus electrodes for forming an electron lens for focusing and accelerating electron beams emitted from the electron emitter, lead pins extending through the neck and connected to the first and second focus electrodes, and a socket with pin connection terminals connectable to the lead pins; a voltage applying unit for applying an AC voltage to at least one of the focus electrodes through a lead pin connected to the focus electrode; and a voltage drop unit for reducing the AC voltage applied by the voltage applying unit to a second of the focus electrodes so that a reduced voltage is applied to a lead pin connected to the second focus electrode, the voltage drop unit being connected to the lead pins through pin connection terminals of the socket.

Abstract: A negative active material for a lithium secondary battery which is capable of improving packing density and has good high-rate charge/discharge and cycle life characteristics is provided. The negative active material includes a crystalline carbon core and an amorphous carbon shell. Alternatively, the negative active material includes secondary particles prepared by gathering at least one crystalline carbon primary particle. A surface of the secondary particles is coated with an amorphous carbon and the secondary particles has a substantially spherical form. The negative active material has two exothermic peak of the differential thermal analysis at 1000° C. or less. A lithium secondary battery using the negative active material can use propylene carbonate for an organic solvent of an electrolyte.

Abstract: A liquid crystal display includes front and rear insulating substrates, each having inner and outer surfaces. The inner surface of the rear substrate faces the inner surface of the front substrate. A transparent electrode is formed on the inner surface of the front substrate, and a mirror electrode made with a reflective material is formed on the inner surface of the rear substrate. A polarizer is attached on the outer surface of the front substrate, and homogeneously aligning films are coated on the transparent and the mirror electrodes, followed by rubbing unidirectionally. A liquid crystal layer is interposed between the homogeneously aligning films on the two substrates. The liquid crystal layer is composed of a nematic liquid crystal material which has positive dielectric anisotropy and a chiral dopant to have a twisted structure. The molecular director in the liquid crystal layer is initially in the &pgr;-twisted state.

Abstract: An electrode of an electron gun for a cathode ray tube including a first electrode member having a large-diameter electron beam passing aperture through which three electron beams pass, and a second electrode member in the first electrode member so as to be spaced apart from the edge of the first electrode member and having three small-diameter electron beam passing apertures, wherein a slanted portion extends from the edge of the first electrode member toward the interior of the large-diameter electron beam passing aperture.

Abstract: A solid dielectric material is installed between the second focus electrode and third focus electrode in a one-pin dynamic electron gun assembly in order to increase capacitance between the two electrodes. The increased capacitance between the two electrodes reduces the voltage Vg between the two electrodes and increases the effective voltage Vd (eff) between the third focus electrode and the fourth focus electrode since Vd=Vg+Vd (eff).

Abstract: A negative electrode active material for a lithium-based secondary battery includes a graphite-like carbon material having an intensity ratio I(110)/I(002) of an X-ray diffraction peak intensity I(002) at a (002) plane to an X-ray diffraction peak intensity I(110) at a (110) plane of less than 0.2.

Abstract: Disclosed is a flat panel display and a method for manufacturing the same. The flat display has a first substrate and a second substrate sealed in a vacuum at a predetermined interval to form a cell gap and including a plurality of spacers interposed therebetween, the second substrate including a plurality of anode electrodes formed in a predetermined pattern on one side thereof and a phosphor layer formed on the pattern of the anode electrodes.

Abstract: A method and apparatus for displaying a gray scale of a plasma display panel, by which generation of a pseudo contour upon expression of a gray scale with respect to a moving picture is prevented when a picture is displayed on a plasma display panel. The method can prevent generation of pseudo contours of dark lines (or bright lines) so that a temporal inconsistency appears as spatial inconsistency, at a portion of a moving picture in which gray scale changes are subtle, when expressing a gray scale by temporal duplication of light emission using the after-image effect of vision.

Abstract: A cathode ray tube includes a panel having a substantially flat outer surface and an inner curved surface with a phosphor screen. The panel has a substantially rectangular effective screen portion with two long sides parallel to each other, two short sides parallel to each other and four rounded edges interconnecting each long side and the neighboring short side. The effective screen portion is structured such that a first line V1 interconnecting centers of the long sides, a second line H1 interconnecting centers of the short sides and a third line D1 interconnecting centers of the rounded edges opposite to each other meet at a point. The effective screen portion has a first thickness Tv at the centers of the long sides, a second thickness Th at the centers of the short sides, a third thickness Td at the centers of the edges and a fourth thickness Tc at the meeting point of the all three lines V1, H1 and D1.

Abstract: There are provided a composition for forming a conductive layer comprising 0.01˜0.1% by weight of a conductive black pigment, 0.05˜10% by weight of a binder,0.01˜50% by weight of a conductive agent, and the remaining amount of a solvent on the basis of the total weight of the composition, and a cathode ray tube (CRT) having the conductive layer formed by coating the composition on the outer surface of a panel, drying and heating the same, and a protective layer formed on the conductive layer. The conductive layer formed using the composition has excellent conductivity, contrast characteristics and film properties. Also, a clean color purity and high-quality body color are attained.

Abstract: A shadow mask for a cathode ray tube includes a beam-guide member having a substantially rectangular shape with short opposite sides in a vertical axis direction and long opposite sides in a horizontal axis direction. The beam-guide member is provided with a plurality of apertures and tie bars interconnecting the neighboring apertures in the vertical and horizontal axis directions. Each aperture has an opening portion and a tapering portion surrounding the opening portion. A skirt with a bent end portion is extended from the beam-guide member. The beam-guide member is structured such that the relationship of a length A of the tie bar in the vertical axis direction to a pitch Pv between the neighboring apertures in the vertical axis direction satisfies the following condition: 0.05≦APv≦0.15.

Abstract: A negative active material for a rechargeable lithium battery having the high content of boron is provided. A mixed solution including a pitch, a boron compound and a solvent is prepared and the solvent is removed from the mixed solution to prepare mesophase pitch. The mesophase pitch is then carbonized and the carbonized material is graphitized to obtain the negative active material.

Abstract: A hybrid polymer electrolyte includes a copolymer matrix of poly(vinyl chloride) and poly(vinylidene chloride) having a plurality of pores, and a solution of an alkali metal salt in an organic solvent entrained in the pores of the copolymer matrix. The pores of the copolymer matrix occupy 10 to 50 volume percent of the hybrid polymer electrolyte.

Abstract: A light-emitting compound and a display device adopting the light-emitting compound as a color-developing substance. When an organic layer such as a light-emitting layer is formed using the light-emitting compound as a blue light-emitting material, an organic electro-luminescence device having improved luminous efficiency and luminance characteristics can be obtained.

Abstract: A cathode ray tube includes a panel with an inner phosphor screen and a rear portion. A funnel is connected to the rear portion of the panel. The funnel is sequentially provided with a body having a large-sized end and a small-sized end, and a cone portion having a large-sized end and a small-sized end. The large-sized end of the body is sealed to the rear portion of the panel. The small-sized end of body meets the large-sized end of the cone portion at a point. A neck is sealed to the small-sized end of the cone portion. The funnel is structured to satisfy the following condition: 1.16≦(D/2)/tan((&psgr;/2))/(FG−TN)≦1.35 where D indicates the size of an effective area of the phosphor screen, FG indicates the distance between the large-sized end of the body and a final accelerating electrode of an electron gun fitted in the neck, TN indicates the distance between the small-sized end of the cone portion and the inflection point of the funnel, and &psgr; indicates an electron beam deflection angle.

Abstract: Disclosed is carbonaceous material for a negative electrode of a lithium secondary battery which reduces an irreversible capacity and increases a discharge capacity of the battery. A surface of carbon particles of the negative electrode is coated with a porous nickel thin film, wherein the nickel film comprises 0.05% by weight to 1.0% by weight of the carbonaceous material.

Abstract: A negative active material for a lithium secondary battery includes a crystalline graphite core and a carbon shell. The carbon shell includes at least one material selected from a transition metal, an alkali metal, an alkaline earth metal, an element of Group 3B of the Periodic table, an element of Group 4B, an element of Group 5B or a mixture thereof. The carbon shell is a turbostratic carbon layer, or am amorphous or crystalline carbon layer having different physical properties from the core. The negative active material can be used in a lithium secondary battery such that the battery has a large discharge capacity and a high charge/discharge efficiency.