Abstract: A method for manufacturing a cathode ray tube is provided which comprises (a) spraying on the inner surface of a phosphor layer of a phosphor coated panel, an organic composition for forming a heat labile film, the organic composition being free of flammable or explosive organic solvents and including an initiator capable of forming a radical or cation when exposed to ultraviolet or electron rays and at least one resin containing at least one group consisting of acrylate, vinyl and diazo functional groups to form a heat labile film thereon; (b) exposing the heat labile film to ultraviolet or electron rays to from a hardened film layer; (c) forming an aluminum layer on a surface of the hardened film layer to form a screen; (d) sealing with heat the panel and a funnel to form a bulb with a mount including an electron gun and a stem, wherein the step of sealing to form a bulb decomposes the hardened film layer.

Abstract: A ferroelectric liquid crystal display is supplied with voltages by STN driving IC's, and a bias voltage circuit for generating voltages supplied to bias pins of driving IC's is provided. The two composite voltages are supplied to liquid crystal cells during the pixel period and the kinds of composite voltage is five or six. In order to supply these composite voltages to the liquid crystal cells, control signal pins of STN driving IC's are supplied with a signal which is "high" during the first half of pixel period and "low" during the latter half of pixel period, and bias voltage pins are supplied with voltages which should be applied to common electrodes and segment electrodes. The circuit for generating bias voltages such voltages includes a plurality of resistors and two power supplies. Thus, the ferroelectric liquid crystal displays can be economically driven, and the flickering of a picture is decreased.

Abstract: An electron gun for a color cathode ray tube includes a cathode, a control electrode and a screen electrode constituting a prepositioned triode. First, second, third and fourth focus electrodes form two pre-focus lenses and a final accelerating electrode positioned adjacent to the fourth focus electrode forms a main focus lens. The first pre-focus lens is synchronous with a deflection signal. Variation of the focussing intensity of the main focus lens is compensated for by the first pre-focus lens.

Abstract: Disclosed is a cathode assembly of an electron gun for a color cathode ray tube in which a heater support structure is improved. The cathode assembly of an electron gun for a color cathode ray tube comprising three cylindrical sleeves which are arranged in an in-line type, a base metal which is located at the upper end of the sleeves, and of which the surfaces are coated with thermal electron emitting material, a heater which is located on the inner portion of each of the sleeves and having two parallel terminals which are exposed out of the sleeves, and a heater fixture block in which three pairs of welding terminals corresponding to the three heaters and two signal lines for forming an electrical circuit along with the welding terminals are provided in the lateral surface and two parallel bead glasses for supporting the sleeves and the block. The heater support structure is simple and the stability thereof is improved. Also, the heater is easily assembled to have a high productivity.

Abstract: A cathode ray tube having an antistatic and non-glare coating with a controlled and uniform degree of unevenness, can be produced by the process which comprises the steps of mixing an alcohol solution of an acid and a partially hydrolyzed alkylsilicate monomer with an amount of water being of at least four times greater than the number of moles of the alkylsilicate; applying the mixed solution to the outer surface of the panel by spin coating; followed by heating the resulting coating to a temperature in the range of 150.degree. to 200.degree. C. to form an antistatic and non-glare coating.

Abstract: A plasma display panel includes stripe-like anodes and barrier ribs on an upper face plate, first sustaining electrodes over the inner surface of a lower rear plate, and stripe-like cathodes on the first sustaining electrodes insulated from the first sustaining electrodes by interposing layers. The stripe-like cathodes are respectively connected to external capacitors via a common node and serve as second sustaining electrodes. In a driving method of the panel, the first sustaining electrode is supplied with a pulse varying from ground potential to a first positive potential, from the positive potential back to ground potential, and then from ground potential to a first negative potential. The second sustaining electrode is supplied with a pulse varying from ground potential to the first negative potential, from the first negative potential back to ground potential, and then from ground potential to the first positive potential.

Abstract: A plasma display panel includes anodes and barrier ribs formed on an upper face plate, first sustaining electrodes which are formed on a lower rear plate, and covered with a dielectric material, and cathodes which are formed on the dielectric material and connected to the respective capacitors via a common node, thereby serving as second sustaining electrodes.

Abstract: A flat-panel display device is disclosed which comprises m column electrodes, n row electrodes, a column electrode driver for driving the m column electrodes in response to pixel data, and a row electrode driver for driving the n row electrodes by a one-line-at-a-time scanning methode, the column electrode driver comprising a detector for checking whether or not the number of turned-on column electrodes among the m column electrodes is greater than a predetermined number and an on-time varying unit for shortening the on-time of the column electrodes in response to the output of the detector. The device has an effect of reducing power consumed by varying the on-time of the electrodes when more than the predetermined number of pixels are on.

Abstract: A flat cold cathode fluorescent lamp include front and rear plates separated by spacers. A phosphor layer is formed on each upper side of a spacer in contact with a phosphor layer of the front plate, and an auxiliary electrode is provided lengthwise on each lower side of the spacer, thereby realizing uniformly luminous pictures.

Abstract: The present invention discloses a phosphor slurry composition for color Braun tubes comprising deionized water, phosphor powder, polyvinyl alcohol, sodium dichromate, ethyl silicate and zinc sulfate. A color Braun tube manufactured using a phosphor slurry composition of the present invention shows an excellent mirror reflection effect and high luminescent brightness.

Abstract: This invention discloses a method for making a silicon field emission device which ensures in the higher electron emission effect at the same voltage required for field emission by shrinking the diameter of a gate aperture to make the field emission structure sharp. The shrinkage effect of the gate aperture of about 42-45% may be achieved in accordance with this invention.

Abstract: A planar discharge plasma display device which can be easily manufactured and has low optical loss includes a front and a rear plate, a plurality of anode signal lines and cathode signal lines arranged in an X-Y matrix on the rear plate and insulated so as not to be exposed to a discharge space. Anodes and cathodes protrude from the anode signal lines and cathode signal lines, respectively, near the intersections of the anode signal lines and the cathode signal lines. Barrier ribs are stacked on the anode signal lines and lodged between the anode signal lines and the front plate.

Abstract: A plasma display panel includes barriers arranged in a striped form on a front plate, a sustaining electrode formed over the entire surface of a backing plate, insulating layers coated on the sustaining electrode in a matrix form, first electrodes formed on the first insulating layers in a striped form, second insulating layers coated on the first electrodes in a striped form, and second electrodes formed on the second insulating layers.

Abstract: A tension band for fastening a cathode ray tube and a cathode ray tube fastened with the band around the skirt of the panel thereof are disclosed. The band comprises a single band unit having no seam therein and is made of synthetic resin mainly containing polyamide and glass fiber. The content ratio of the polyamide to glass fiber is preferably 3:7 to 7:3. Before the band is mounted on the cathode ray tube, the ratio of the inner circumference of the tension band as against the outer circumference of the skirt of the panel is preferably 98.79-99.90%. The tension band is easy to manufacture and place on the cathode ray tube, effectively preventing crack expansion and implosion of the cathode ray tube.

Abstract: The present invention discloses a phosphor slurry composition for color Braun tubes comprising deionized water, phosphor powder, polyvinyl alcohol, sodium dichromate, ethyl silicate and zinc sulfate. A color Braun tube manufactured using a phosphor slurry composition of the present invention shows an excellent mirror reflection effect and high luminescent brightness.

Abstract: A planar discharge plasma display device is disclosed, wherein common third signal lines, first signal lines for display discharge, and second signal lines for auxiliary discharge are formed on a rear plate, and barrier ribs for preventing cross-talk between pixels are formed together. Particularly, the signal lines and barrier ribs formed in the same direction constitute an accumulated structure so that the display discharge can be caused fast and stably, and also the occupation area of pixel per unit area is maximized, thereby realizing an image display of higher density.

Abstract: An electron gun for a cathode ray tube includes common large-aperture electron beam passing holes which are formed by recessing the portion except the rims on the outgoing side plane of a focus electrode and the incoming side plane of a final accelerating electrode, for expanding an electric field. Three independent small-aperture electron beam passing holes are formed at the recessed position by a predetermined depth from the rims. The ratio of the horizontal diameter to the vertical diameter of the central electron beam passing hole among the three independent small-aperture electron beam passing holes of the focus electrode is smaller than those of the outer independent small-aperture electron beam passing holes. Accordingly, the influence of the spherical aberration to the electron beam which passes through the main lens is reduced, so that the quality of the picture reproduced on the screen is improved.

Abstract: An electron gun for a color cathode ray tube is formed such that parallel vertical blades are extending toward cathodes formed at both edges of each electron beam passing hole in the outgoing plate of a focus electrode. Horizontal blades extending toward the cathodes at a predetermined length are formed at the edges of the top and bottom portions of electron beam passing holes in the incoming plate of a dynamic focus electrode. Thus, the horizontal blades are inserted into the electron beam passing holes of the focus electrode, which reduces astigmatism due to deflection aberration and improves the focusing characteristics.

Abstract: A shadow mask frame for prevention of halation in a color picture tube is characterized in that a bent end portion bent toward the frontal face of the panel is provided around the periphery of an open portion of the frame in a predetermined inclination angle relative to the plane of the frame, the bending being formed toward the panel of the picture tube. The ineffectively overscanned electron beams are positively reflected away toward the opposite side of the luminescent screen, with the result that not only the halation prevention effect becomes superior, but also that there is no difficulty in manufacturing and assembling.

Abstract: A backlight generating apparatus of an LCD device comprising a light-passing plate which is sloped with respect to a diffusing plate by a predetermined angle. The space between the two plates is filled with a diffusing material having a larger index of refraction than that of the light-passing plate. The present invention employs a diffusing plate with a transmissivity of over 30% to increase light efficiency, improve brightness, and decrease power consumption.