Abstract: An image intensifier tube comprising a housing which holds a photocathode and a screen, wherein a microchannel plate is supported in a recess in an interior surface of an annular collar which is also held in the housing.

Abstract: A discharge lamp, suitable for operation by means of dielectrically impeded discharge, having a discharge vessel with two at least partially parallel vessel walls (2; 7), and at least one spacer (1) made from optically transparent insulating material. The or each spacer (1) is in contact with the two vessel walls (2; 7) via bearing surfaces. The or each spacer has an optically diffuse surface (8) at least in the region of one bearing surface.

Abstract: A funnel for a cathode ray tube has a relationship 0<?(z)<d in an arbitrary cross section P(z) parallel with a plane including an open end portion, where ?(z) is an angle (°) defined between a line and a major axis (LA) of the funnel, the line being connecting an outermost part D(z) on at least one of an outer surface and an inner surface of the body portion and a center axis (C) of the funnel, and d is an angle (°) defined between a diagonal axis (DA) of the funnel and the major axis (LA).

Abstract: A color cathode ray tube capable of improving the luminance attenuation characteristic and the explosion-proof characteristic through an improved shape of a panel is disclosed. In an equation F=Rdo/(Sd H 1.767), F>21, Tc/CFT?1.35, and Rdi>(Ryi or Rxi) are satisfied, wherein Sd is a length of a diagonal effective picture of the panel, Rdo is a curvature radius of a diagonal outer surface, Ryo is a curvature radius of a vertical outer surface, Rxi, Ryi and Rdi are a horizontal, vertically and diagonal curvature radius, respectively, CFT is a thickness of a center portion, Tc is a thickness of a diagonal end of the effective surface, F is a planarizing rate of the outer curvature.

Abstract: An electroluminescent device including: a first electrode; a second electrode; and a light-emissive region of electroluminescent organic material between the electrodes; and wherein the first electrode includes a first material capable of injecting positive charge carriers into the light-emissive region and a second material capable of injecting negative charge carriers into the light-emissive region; and the second electrode inclueds a third material capable of injecting positive charge carriers into the light-emissive region and a fourth material capable of injecting negative charge carriers into the light-emissive region.

Abstract: The present invention relates to a deflection yoke. According to the invention, in particular, anti-release means is provided in upper hook pieces formed in sides of a rear cover thereby preventing a printed circuit board from easy separation from the rear cover in fixing therebetween so that the assembling ability and productivity can be enhanced.

Abstract: In a spark plug, a complex chromate coat 42 that contains a chromium component and a phosphorus component as cationic components, at least 90 wt % of the chromium component being trivalent chromium and the phosphorus component being present in an amount of 1 to 15 wt % as calculated for PO4, is formed on the surface of the galvanized main metal shell 1 of a spark plug. If a silicon component is substituted for the phosphorus component, it may be present in an amount of 5 to 75 wt % as calculated for SiO2.

Abstract: A plasma display apparatus includes a plasma display panel, a circuit board mounting a drive circuit for driving the plasma display panel, a chassis structure provided on the backside of the plasma display panel for supporting the plasma display panel and for mounting the circuit board. In particular, the chassis structure comprises a first chassis member mounting the circuit board, and a second chassis member fixed on the backside of the plasma display panel, a plurality of support portions provided between the first and second chassis members for supporting the two chassis members and for forming a predetermined interval between the two chassis members.

Abstract: A flange portion is integrally formed with a stem which forms a sealing envelope for a gas discharge tube. Accordingly, operation for building and fixing the flange portion is not necessary, so that lamp assembly operation is simplified, and mass production is facilitated. In addition, when a gas discharge tube is to be fixed to an external stem setting portion, lamp setting is enabled at higher precision by utilizing positioning holes formed in the flange portion in advance.

Abstract: An image display device comprising a light modulation panel, an illumination device arranged opposite the light modulation panel and a light source connected to the illumination device. The illumination device comprises at least one separating layer which has at least one flat surface extending parallel to the light modulation panel and a serrated surface situated on a side which faces away from the flat surface. Said serrated surface includes a number of sawtooth-shaped, juxtaposed projections which are each bounded by a first and a second separating surface, the first separating surface enclosing an acute interior angle with the flat surface and the second separating surface enclosing an obtuse interior angle with the flat surface.

Abstract: A electron emission cathode includes an emitter having an apex from which electrons are emitted. The emitter is attached to a heating filament at a junction and extends from the junction both forward toward the apex and rearward. A reservoir of material that lowers the work function of the emitter is positioned on the rearward extending portion of the emitter. By positioning the reservoir on the rearward extending portion, the reservoir can be positioned sufficiently far from the junction to reduce its temperature and thereby greatly increase the useful life, of the emitter without adversely affected the emission characteristics of the source.

Abstract: A discharge tube is comprised of a glass bulb, a cathode, and an anode. Impregnating porous tungsten with barium makes the cathode tip portion. A clearance between the end face of a lead rod and the end face of the cathode tip portion is filled with a molybdenum-ruthenium brazing filler metal.

Abstract: A light source (10) includes a light emitting component (32), such as a UV/blue light emitting diode or laser diode, a layer (46) of a light scattering material (42), and a layer (48) of a phosphor material (44). The phosphor material converts a portion of the light emitted by the light emitting component to light of a longer wavelength, such as yellow light. The scattering material scatters the light emitted by the light emitting component and/or the light converted by the phosphor to improve the overall uniformity of the angular distribution of the light. When combined, the converted and scattered light has a more uniform angular distribution, that is, it maintains the approximately the same color as the viewing angle is changed.

Abstract: LEDs of a light matrix display are mounted between two metal frames. Each frame has air ducts to circulate air around the LEDs, thereby removing the heat generated in the LEDs and allowing higher intensity light to be emitted.

Abstract: An electron multiplier having an access for allowing a beam to pass is presented. The electron multiplier collects particles traveling back along the beam and is capable of collecting the particles arbitrarily close to the beam. The electron multiplier includes at least two plates having secondary electron emitting surfaces, the at least two plates being separated by a small distance. The electron multiplier has a beam access through the at least two plates. Particles enter the electron multiplier in a direction opposite that of propagation of the beam and impact a secondary electron emitting surface, thereby being captured between the top plate and the bottom plate. In some embodiments of the invention, the electron multiplier is segmented so that azimuthal distributions of the particles can be determined. In some embodiments, the electron multiplier includes a stack of electron emitting surfaces arranged so that an angular distribution of the particles can be determined.

Abstract: A plasma display panel includes an address electrode formed in each discharge cell where a red phosphor, a green phosphor and a blue phosphor are formed, and a sustain electrode formed to cross the address electrode, having a first width in a discharge cell having the red phosphor, a second width in a discharge cell having the green phosphor, and a third width in a discharge cell having the blue phosphor. Since an aging voltage of the discharge cell having the green phosphor becomes lower by varying the sustain electrode, the address electrode, a dielectric film or an isolation wall, the probability to destroy insulation of the dielectric is reduced. Also, since the deviation between the aging voltages for emitting each discharge cell is reduced, a minimum value of the margin voltage stably showing white color becomes lower and a white colored voltage margin which is a common region of red, green, blue and white voltage regions increases, thereby broadening the control range of a circuit.

Abstract: An image intensifier tube comprising a housing which holds a photocathode and a screen, wherein a microchannel plate is supported in a recess in an interior surface of an annular collar which is also held in the housing.

Abstract: The spark plug body includes radially extending stops which limit the movement of the spark plug body in one direction with respect to an aperture through a around plane surface. The spark plug body further includes bosses radially extending from a section of reduced diameter wherein slots are formed between the radially extending bosses and a ring-shaped transverses floor which is positioned to be coplanar with the ground plane surface. The prongs of a ground fastener extend though the slots thereby securing the spark plug body with respect to the ground plane surface. Additionally, the ground fastener includes a spark gap portion which is positioned with respect to the tip of the spark plug thereby precisely forming a gap and forming the electrical connection between the spark gap and the ground plane surface.

Abstract: The periphery of a stem, which seals off the neck of a CRT and supports pins providing electrical current to some of electron gun's electrodes, is designed to contact either inner surface or outer surface of the neck end as well as the cross section thereof in order to prevent pores when the stem and the neck are fused together.

Abstract: Electromagnetic deflection unit for colour cathode-ray tubes, comprising a pair of horizontal deflection coils and a pair of vertical deflection coils, the saddle-shaped vertical deflection coils having a rear bundle on the electron-gun side and a front bundle located on the screen side, lateral conductor harnesses 120 connecting the two bundles so as to produce a main window in the intermediate region lying between these said bundles, the conductor harnesses being arranged so that, at the front end of the main window 18, on the screen side, the window 18 extends over a radial angular aperture &PHgr; of greater than 38°. This arrangement of the conductors in the rear part of the window makes it possible to minimize the vertical convergence errors between the red and blue beams, so as to avoid the use of additional field shapers to correct the said errors.