Abstract: In a color cathode ray tube in which a shadow mask and an inner magnetic shield are supported by a mask frame and an electron shield is provided in the mask frame, at least a part of the electron shield is made to have a smaller anhysteretic magnetic permeability than the shadow mask, the mask frame and the inner magnetic shield when an applied magnetic field is 800 A/m (10 Oe). Since the magnetic resistance of the electron shield increases, it is possible to reduce a leakage magnetic field from a tube-axis-side edge of the electron shield. Thus, a color cathode ray tube that reduces mis-landing due to a terrestrial magnetism and has no color displacement can be provided.

Abstract: An amalgam assembly for a fluorescent lamp includes a glass exhaust tubulation extending from an envelope portion of the lamp toward a base portion of the lamp, the tubulation being closed at an end adjacent the lamp base portion, and a glass body disposed in the tubulation and retained by a pinched portion of the tubulation, the glass body being disposed between the pinched portion and the closed end of the tubulation. A mercury amalgam body is disposed between the glass body and the closed end of the tubulation. A mercury wetting metallic layer is disposed on a selected one of (i) an inside surface of the tubulation between the pinched portion and the closed end of the tubulation, and (ii) a surface of the glass body whereby to a wet at least one of (i) the interior surface of the glass tubulation and (ii) the surface of the glass body, to prevent the amalgam, when liquidized, from flowing past the tubulation pinched portion and into the lamp envelope.

Abstract: Disclosed is an electron gun for a cathode ray tube capable of improving substantial resolution by improving the alignment of a triode portion. The electron gun includes a triode portion composed of at least one cathode for emitting electron beams, and a first electrode and a second electrode for controlling emission amount of the electron beams, a focus electrode and an anode electrode forming a prime lens for focusing the electron beams on a screen, and at least two guide holes housed in more than two electrodes for use of assembly besides electron beam passage holes, in which at least one guide hole is circular and at least one of the other guide holes is non-circular.

Abstract: The invention relates to a high-pressure discharge lamp having a discharge vessel with a ceramic wall which is closed at an end by a projecting plug. A lead-through construction inside the projecting plug leads to an electrode inside the discharge vessel. Part of the lead-through construction is formed by a cermet, which extends fully inside the lead-through element. According to the invention, the cermet is directly fastened to the projecting plug by means of a sintered joint.

Abstract: A plasma display device is disclosed. The plasma display device has a first panel and a second panel parallel to each other. A dielectric layer is formed on the second panel, a plurality of barrier ribs are formed on the dielectric layer, and a plurality of buffer layers are formed opposite to the barrier ribs. The buffer layers have a first softening temperature, the barrier ribs have a second softening temperature, and the first softening temperature is lower than the second softening temperature. The buffer layers can be deformed and compressed at a temperature higher than the first softening temperature during a process for sealing the first and second panels, so as to unify heights of the barrier ribs.

Abstract: The invention relates to electric lamps and more particularly to automotive signal lamps. Lead-free, cadmium-free, sulfate-refined glass compositions are described for use in electric lamps, which glass is amber colored and comprises no toxic or forbidden components which could be harmful to the environment such as lead oxide, antimony oxide, selenium or cadmium.

Abstract: The invention relates to a flat color CRT in which the upper plate width of a frame for tensioning and fixing a shadow mask is enlarged so that the CRT is free from an influence from howling of the shadow mask and welding and productivity of the shadow mask and the frame may be simplified. The shadow mask assembly comprises a shadow mask having an effective area with slots and a non-effective area without slots in the periphery; and a frame fixing body for tensioning the shadow mask; wherein the shortest distance tM from the outermost end of a main frame welded to the shadow mask to the interface between the effective area and the non-effective area and the width tW of the mask welding part formed at the upper part of the main frame have the relation of 0.14 ≤ t W t M ≤ 1.0 .

Abstract: In a display device including a cathode filament containing a coiled portion and a linear portion thereof and a power feeding member, an end of the coiled portion is fixed to either a substrate made of an insulating material or an insulated support, the power feeding member being installed to contact with the linear portion of the cathode filament.

Abstract: An iridium alloy firing tip, fixed to a center electrode, comprises a stem and a head. The firing tip head is integrally formed from one end of the stem. A distal end of the stem is opposed to an opponent electrode. The head is embedded in the opposing portion. The firing tip head is pointed or tapered in a direction opposite to the stem from a maximum diameter portion in such a manner that a cross-sectional area of the head continuously decreases with increasing distance from the maximum diameter portion. The maximum diameter portion is positioned deeply inside the opposing portion, and a base end of the stem extending from the maximum diameter portion is wrapped or surrounded by the opposing portion.

Abstract: A shadow mask for a cathode-ray tube is provided to improve shock resistance and howling characteristics. A color cathode-ray tube including a panel whose outer surface is near flat and whose inner surface has a specific curvature, a funnel set in the rear of the panel, an electron gun set at a neck placed in the rear of the funnel, and a rectangular shadow mask placed at the inner side of the panel, having a predetermined distance from the inner surface of the panel, to select colors of electron beams emitted from the electron gun. When the radius of curvature of the longer axis of the shadow mask is Rx, the radius of curvature of its shorter axis is Ry, and the radius of curvature of its diagonal axis is Rd, these radiuses of curvature are appropriately designed to increase strength of the shadow mask.

Abstract: A dielectric barrier discharge lamp device which allows ultraviolet rays to be uniformly radiated onto a workpiece having a large surface area and which can be easily adapted to the size of workpiece. In the dielectric barrier, at least one dielectric barrier discharge lamp is arranged in a hermetically sealed casing which has a hollow longitudinally extending main part that is closed at both ends by end parts, at least a portion of the main part of the casing defining a window allowing light radiated from the at least one dielectric barrier discharge lamp to pass therethrough onto the workpiece. At least one end part of the casing is provided with a passage allowing inert gas to be introduced into the casing, and at least one end part of the casing is adapted to allow loading or unloading of the at least one dielectric barrier discharge lamp. A plurality of casings are arranged side by side with their windows facing the workpiece to be irradiated.

Abstract: The invention relates to a high-pressure discharge lamp which is provided with a discharge vessel which encloses a discharge space. The discharge vessel has a ceramic wall and is closed by a ceramic plug. An electrode which is located inside the discharge space is connected to an electric conductor by way of a leadthrough element. The leadthrough element projects through the ceramic plug with a close fit and is connected thereto in a gastight manner by way of a sealing ceramic. The leadthrough element has a first part which is formed by a cermet at the area of the gastight connection. In accordance with the invention the leadthrough element has a second part which is a metal part which extends from the cermet in the direction of the electrode.

Abstract: An electron gun is provided for a color CRT having a triode for emitting, controlling, and accelerating R, G, B beams, and main lens forming electrodes for focusing the R, G, B beams emitted from the triode onto a screen. The electron gun includes first dynamic quadrupole lens forming electrodes for providing a vertical focusing action and a horizontal focusing action to be applied to the R, G, B beams such that the vertical focusing action is different from the horizontal focusing action, and second dynamic quadrupole lens forming electrodes for providing horizontal/vertical focusing actions to be applied to the R, B beams, side beams, and horizontal/vertical focusing actions to be applied to the G beam, a center beam, the horizontal/vertical focusing actions to be applied to the R, B beams being different from the horizontal/vertical focusing actions to be applied to the G beam.

Abstract: A panel defining a front exterior of a cathode ray tube has an inner surface overlaid with a phosphor screen, and an outer surface overlaid with a tinted coating layer, wherein the tinted coating layer varies light transmission at the center and the periphery of the panel by being dark at the center and gradating brighter toward the periphery thereby preventing a difference in brightness of the panel between the center and the periphery thereof due to incremental growth in the volume of a black matrix and in the thickness of the panel toward the periphery.

Abstract: For use in a color cathode ray tube (CRT) having a display screen with a flat outer surface and a curved inner surface, a 2-layer antistatic and antireflective coating for the display screen's flat outer surface compensates for the variation in screen thickness to provide uniform light transmission through the screen and coating combination, a high degree of video image contrast, effective electrostatic shielding and discharge, and reduced light reflectivity. The coating includes a first inner electrically conductive layer disposed on the CRT display screen's flat outer surface containing carbon black particles for a high level of video image contrast and improved electrical conductivity for electrostatic shielding and discharge. The extent of light transmission through the inner conductive layer may be adjusted in accordance with the display screen's thickness by varying the amount of carbon black particles in the coating solution.

Abstract: Fittings for adapting conventional fluorescent light fixtures to receive smaller-diameter T5 fluorescent tubes are described. The fittings include transparent tubes adapted to fit around the small-diameter T5 light, electronic components for supplying high-frequency current, and insulation caps having pins which correspond to the receptacle for the lamp that is being replaced.

Abstract: The present invention describes the details of a flat mask before tension is applied, an assembling method of that flat mask, and a tension mask assembly manufactured by using that method in order to obtain satisfactory thermal expansion, uniform stress distribution and linearity. The flat mask includes an apertured portion and supporting ends surrounding the apertured portion. The apertured portion comprises a plurality of concave pin-cushion type or convex barrel type strips, a plurality of real bridges connecting strips and dividing slots, and dummy bridges formed in the slots. The short supporting ends have the same width along a longitudinal direction and are formed to have the same curvature as the strips facing the supporting ends. The short supporting ends are preferably half-etched in order to make the volume of material removed from the short supporting ends greater than the volume of material removed from the apertured portion.

Abstract: A metal halide lamp has a ceramic discharge vessel with two ends (5) which are closed off by sealing means which enclose a capillary tube (11). An electrically conductive lead-through (9) is passed in a vacuum-tight manner through a bore in the capillary tube (11). The capillary tube (11) comprises two sections (20, 21) which are arranged axially one behind the other, the diameter of the bore of the inner section amounting to at most 90% of the diameter of the bore in the outer section.

Abstract: A short-arc lamp (1) with a discharge vessel (2) which contains an anode (3) and cathode (4) which are opposite one another. The filling medium contains inert gases and/or metal vapors, and the anode comprises a body having a front section (11), a substantially cylindrical body (12) and a rear face (13). Provided in the region of the front half of the cylindrical body is a projection (20) whose radial length (X) projects at least 0.5 mm beyond the cylindrical body (12).

Abstract: A color display tube (1) is disclosed, which comprises an improved suspension system of the color selection electrode (12). The color display tube has suspension means that are constructed so as to be self-locking. The suspension means (20) are provided with an additional flat portion (31). This plate has an aperture (32) that is shaped such that it has at least three surfaces of engagement (42, 43) for the free end portion (22) of the supporting elements (17) connected to the inside of the upright edge (18) of the display window (3). When the color display tube is exposed to shock loading, the construction of the flat portion (31) is capable of absorbing this shock without the color selection electrode (12) becoming detached from the supporting elements (17). The action is based on the friction between the surfaces of engagement (42) and the free end portion (22).