Abstract: The indirectly heated cathode ion source assembly employs a cathode having a cup shaped body with a base and a cylindrical periphery, a thermal barrier having a plurality of cylindrical foils concentric to the cathode to reduce thermal loss; and a holder receiving the cathode and the thermal barrier in concentric relation.

Abstract: An array substrate and a display device are disclosed. A coating layer (8) is disposed between a base substrate (1) and a first transparent conductive oxide film layer (2), a refractive index of the coating layer (8) is bigger than that of the base substrate (1) and smaller than that of the first transparent conductive oxide film layer (2). A multi-layer reflection phenomenon caused by the relatively big difference between the refractive indexes of the base substrate 1 and the first transparent conductive oxide film layer 2 can be weakened, thereby the light transmission rate of the array substrate may be improved.

Abstract: A dispenser cathode which comprises an emission surface, a reservoir for material releasing, when heated, work-function-lowering particles, and at least one passage for allowing diffusion of work-function-lowering particles from said reservoir to said emission surface, said emission surface comprising at least one emission area and at least one non-emission area covered with emission-suppressing material and surrounding each emission area, said non-emission area comprising at least one passage connecting said reservoir with said non-emission area and debouching within a diffusion length distance from an emission area for allowing diffusion of work-function-lowering particles from said reservoir to said emission area.

Abstract: A dispenser cathode which is comprises an emission surface, a reservoir for material releasing, when heated, work-function-lowering particles, and at least one passage for allowing diffusion of work-function-lowering particles from said reservoir to said emission surface, and emission surface comprising at least one emission area and at least one non-emission area covered with emission-suppressing material and surrounding each emission area, said non-emission area comprising at least one passage connecting said reservoir with said non-emission area and debouching within a diffusion length distance from an emission area for allowing diffusion of work-function-lowering particles from said reservoir to said emission area.

Abstract: An incandescent lamp that is specially adapted for use in combination with a concave reflector in providing a high-intensity beam of light. The lamp includes an optimized filament shape that consist of a filament arranged in coiled coils having a longitudinal axis perpendicular to the reflector longitudinal axis and the larger coils of the coiled coil filament spaced from each other by a distance substantially the same as the filament coil diameter. The filament length, width, and height can be limited to substantially twelve millimeters to optimize the lamp for use with concave reflectors having a focal length of substantially twenty five millimeters, any type curvature, and any size diameter.

Abstract: An electron gun (1) includes an emitter (2), a tubular support (3) and an adaptor (4) for receiving the emitter. The adaptor includes a tapered plugging surface (7) and the tubular support includes a correspondingly tapered seating surface (9) for receiving the plugging surface. The plugging surface and seating surface have conical profiles which help to position the adaptor concentrically with the support.

Abstract: A dispenser cathode which comprises an emission surface, a reservoir for material releasing, when heated, work-function-lowering particles, and at least one passage for allowing diffusion of work-function-lowering particles from said reservoir to said emission surface, said emission surface comprising at least one emission area and at least one non-emission area covered with emission-suppressing material and surrounding each emission area, said non-emission area comprising at least one passage connecting said reservoir with said non-emission area and debouching within a diffusion length distance from an emission area for allowing diffusion of work-function-lowering particles from said reservoir to said emission area.

Abstract: The invention relates to improving the efficiency of ion flow from an ion source, by reducing heat loss from the source both in the ion chamber of the ion source and its constituent parts (e.g. the electron source). This is achieved by lining the interior of the ion chamber and/or the exterior with heat reflective and/or heat insulating material and by formation of an indirectly heated cathode tube such that heat transfer along the tube and away from the ion chamber is restricted by the formation of slits in the tube. Efficiency of the ion source is further enhanced by impregnating and/or coating the front plate of the ion chamber with a material which comprises an element or compound thereof, the ions of which element are the same specie as those to be implanted into the substrate from the source thereof.

Abstract: A cathode structure comprises a heater including a columnar ceramic body and a heating wire that is partially buried in the ceramic body, and a cathode unit disposed at a first end surface of the ceramic body. The heating wire leads out from a second end surface of the ceramic body.

Abstract: A dispenser cathode which comprises an emission surface, a reservoir for material releasing, when heated, work-function-lowering particles, and at least one passage for allowing diffusion of work-function-lowering particles from said reservoir to said emission surface, said emission surface comprising at least one emission area and at least one non-emission area covered with emission-suppressing material and surrounding each emission area, said non-emission area comprising at least one passage connecting said reservoir with said non-emission area and debouching within a diffusion length distance from an emission area for allowing diffusion of work-function-lowering particles from said reservoir to said emission area.

Abstract: The indirectly heated cathode structure includes a base metal having a thermal electron emitting material layer, a cylindrical sleeve holding the base metal at one end portion thereof and housing a heating heater in the inside thereof, an support having a large-diameter portion and g a small-diameter portion, and a cathode disc having a large-diameter portion at the leg-portion-side of the heating heater and having a small-diameter portion at the heater-main-portion side of the heating heater, wherein an outer surface of another end portion of the sleeve and an inner surface of the small-diameter portion of the support are fixed to each other, and an outer surface of the large-diameter portion of the support and an inner surface of the small-diameter portion of the cathode disc are fixed to each other.

Abstract: A cathode sleeve structure for housing a heater. The cathode sleeve structure includes: a case member that is cylindrical and an end thereof is open; a plurality of supporting members that extend radially from vicinities of the end of the case member; and a linkage member that connects the plurality of supporting members. The case member, the plurality of supporting members, and the linkage member are formed as one piece.

Abstract: A cathode system having a cathode element configured to extend through an aperture in a wall of an arc chamber of an ion implanter system. A gas flow through a spacing between the cathode element and the aperture is restricted by a restriction member. A method of ionizing a source gas and a cathode element incorporating the restriction member are also provided.

Abstract: A cathode assembly includes an insulation member, three holders arranged inline in the insulation member, and a support member having a rim portion in which the insulation member is inserted and supported. When a thickness of the insulation member is D millimeters (mm) and a height of the support member is F millimeters (mm), values of D and F are set to satisfy the following inequality: F/D<170%.

Abstract: The invention relates to improving the efficiency of ion flow from an ion source, by reducing heat loss from the source both in the ion chamber of the ion source and its constituent parts (e.g. the electron source). This is achieved by lining the interior of the ion chamber and/or the exterior with heat reflective and/or heat insulating material and by formation of an indirectly heated cathode tube such that heat transfer along the tube and away from the ion chamber is restricted by the formation of slits in the tube. Efficiency of the ion source is further enhanced by impregnating and/or coating the front plate of the ion chamber with a material which comprises an element or compound thereof, the ions of which element are the same specie as those to be implanted into the substrate from the source thereof.

Abstract: A nickel alloy for the manufacture of cathodes for cathode-ray tubes, comprises magnesium and aluminium in proportions chosen so as to allow good adhesion of an emissive oxide layer to the basis metal cap consisting of the alloy.

Abstract: A cathode system includes an impregnated pellet and a conductive cup, which has substantially cylindrical sides. The conductive cup has an open end sized to receive the impregnated pellet and a closed end. The closed end has an internal surface and an external surface. The cathode system also includes a second conductive cup. The second conductive cup also has substantially cylindrical sides, an open end and a closed end. The cathode system further includes a similar third conductive cup. The three conductive cups are electrically coupled together. For construction of the cathode, the first conductive cup receives the impregnated pellet following coupling of the three conductive cups.

Abstract: The present invention relates to a cathode ray structure for a cathode ray tube, and more particularly, to a cathode structure for a cathode ray tube capable of maximizing thermal efficiency and minimizing power consumption.

Abstract: A cathode assembly (43) for a computed tomography scanning system (10) is provided. The cathode assembly (43) includes a one-piece tab assembly (52) for simple and relatively quick installation on a cathode cup (44). In one embodiment, the one-piece tab assembly (52) has two rail portions (56) extending substantially across its length. These rail portions (56) are intended for insertion into channels (50) formed within the cathode cup (44) and for properly locating the one-piece tab assembly (52) in a desired position relative to the filament (46). The assembly (52) further includes two tab portions (58, 58″) located on opposing ends of the rail portions (56). The tab portions (58, 58″) each include a main body portion (62) and a flap portion (54) extending from the main body portion (62). The main body portion (62) extends between the two rail portions (56) and has a mounting surface for attaching the one-piece tab assembly (52) to the cathode cup (44).

Abstract: An indirectly heated metal cathode for an electron tube includes a metal sleeve of an Mo material, a metal emitter disposed on the metal sleeve and including Pt or Pd as a main component; and a buffer layer between the metal sleeve and the metal emitter. The buffer layer prevents Mo, an element of the metal sleeve, from diffusing into the emitter during the operation of the metal cathode so that electron-emitting performance does not decrease rapidly with operating time due to an increase in a work function. Therefore, the metal cathode satisfies a long life span requirement for large scale and high definition electron tubes.

Abstract: A cathode ray tube having a cathode comprising a sleeve with a heater. installed therein and a base metal with a side portion covering an outer circumference of the sleeve and an upper surface portion covering an upper side: of the sleeve, satisfies the following formula: tS≦tB1≦2tS, wherein tB1 is a thickness of the side portion of the base metal and tS is a thickness of the sleeve. Therefore, the warm-up time taken for formation of an image after power is applied to the cathode ray tube can be shortened.

Abstract: Disclosed is a cathode in a cathode ray tube including a cathode sleeve having a heater inside, a base metal supported by the cathode sleeve so as to be formed at an upper end of the cathode sleeve, and an emission layer formed on the base metal, wherein the emission layer includes alkaline earth metal oxide and Y2O3-doped ThO2. The present invention enables to prevent the degradation of endurance of the cathode by carrying out the generation and extinction of free Ba stably.

Abstract: A cathode ray tube has a phosphor screen and an electron gun including an indirectly heated cathode structure and a plurality of electrodes disposed downstream of the indirectly heated cathode structure for projecting an electron beam toward the phosphor screen, and a deflection yoke for scanning the electron beam on the phosphor screen.

Abstract: In a hollow cathode lamp comprising, in a bulb having a light exit port, a hollow cathode and an anode opposed to the light exit port, which comprises a tubular hood having a tubular shape, having one open end connected to the hollow cathode, having another open end opposed to the light exit port, and having an opening formed in a peripheral side face thereof, and an electron supply disposed at a position to front on the opening, discharge making use of thermoelectrons is implemented between the electron supply and the anode.

Abstract: A cathode structure comprises a cathode, a cathode sleeve, a cathode holder and a cathode strap. The cathode sleeve contains a heater. A hold structure includes a cylindrical cathode support cylinder for holding the cathode structure, and a cathode support strap having an elongated plate shape and having a cylindrically curved portion engaging the cathode support cylinder. An opening portion is formed in the cylindrically curved portion of the cathode support strap. The cathode support cylinder of the hold structure and the cathode holder of the cathode structure are welded through the opening portion, and the cathode structure is held by the hold structure.

Abstract: It is an object to obtain a cathode ray tube having a high resolution without decreasing electron emission property. Surface of a cathode was leveled by heating during forming a vacuum in order to oxidize a carbonate salt to an oxide as an electron emissive material, after applying a paste for printing on a metal substrate by screen printing, drying the same, and incorporating an oxide cathode in a cathode ray tube, the paste having a mixture of needle-like particles of the first group and bulk particles of the second group incorporated as an alkaline earth metal carbonate forming an electron emissive material layer.

Abstract: The invention relates to a cathode structure intended to be inserted into an electron gun for a cathode-ray tube. The cathode comprises a cathode body on the end of which is placed an emissive pellet, the cathode body being held in place inside a sheath by supporting means which comprise: a first series of branches, each branch being connected on one side to the cathode body and on the other side to an intermediate piece 30; and a second series of branches, each branch being connected on one side to the sheath and on the other side to the same intermediate piece.

Abstract: An electric discharge tube or discharge lamp comprising a scandate dispenser cathode which is composed of a cathode body and a coating having an emissive surface, said cathode body including a matrix of at least one refractory metal and/or a refractory alloy and a barium compound which is in contact with the matrix material to supply barium to the emissive surface by means of a chemical reaction with said matrix material, and the coating containing one or more multilayers which may include a bottom layer of tungsten and/or a tungsten alloy, an intermediate layer of rhenium and/or a rhenium alloy and a top layer of scandium oxide, a mixture of scandium oxide and rare-earth metal oxides, a scandate and/or a scandium alloy, is characterized by a long service life and a high emission-current density.

Abstract: A cathode ray tube include phosphor screen and an electron gun. The electron gun includes an indirectly heated cathode structure and plural grid electrodes arranged in axially spaced relationship. The cathode structure includes a base metal having an electron emissive material coating and a heater for heating the base metal. The heater includes a major heating portion having a spirally wound heating wire and a pair of leg portions connected to opposite ends of the major heating portion. The major heating portion and an inner portion of each of the leg portions on a major-heating-portion side thereof are covered with an insulating coating, and the heater is welded to electrical conductors for applying a voltage thereto at an outer portion of each of the leg portions, the outer portion not being covered with the insulating coating.

Abstract: A cathode structure comprises a cathode, a cathode sleeve, a cathode holder and a cathode strap. The cathode sleeve contains a heater. A hold structure includes a cylindrical cathode support cylinder for holding the cathode structure, and a cathode support strap having an elongated plate shape and having a cylindrically curved portion engaging the cathode support cylinder. An opening portion is formed in the cylindrically curved portion of the cathode support strap. The cathode support cylinder of the hold structure and the cathode holder of the cathode structure are welded through the opening portion, and the cathode structure is held by the hold structure.

Abstract: An electron-emitting source includes a substrate and a coating film. The substrate is made of a material containing a metal serving as a growth nucleus for nanotube fibers as a main component, and has a plurality of through holes. The coating film is constituted by nanotube fibers formed on a surface of the substrate and wall surfaces of the through holes. A method of manufacturing an electron-emitting source is also disclosed.

Abstract: The present invention relates to a cathode for an electron gun for increasing its life cycle under a high current density load by ensuring a steady diffusion path of reducing component served for generating free radical barium. The present invention discloses a cathode for an electron gun comprising a base metal composed of nickel and at least one kind of reducing component, a metal layer having a recess to enlarge an overall surface area of the metal layer, the metal layer being disposed on the base metal, and an electron emitting layer containing alkaline earth metal oxide including at least barium. The cathode for an electron further comprises a second metal layer disposed on the lower side of the base metal.

Abstract: A heater is built in an inner sleeve of an electron gun, and an impregnated type cathode is fixed at an end portion, on the grid electrodes side, of the inner sleeve. The inner sleeve, having an outside diameter ranging from about 1.0 mm to 1.4 mm and a length substantially equal to a primary spiral length of the heater is inserted in an outer sleeve. The outer sleeve has on the grid electrodes side a small-diameter portion having an outside diameter ranging from about 2.2 mm to about 2.6 mm and on the base end side a large-diameter portion having an outside diameter ranging from about 2.6 mm to 3.0 mm. The inner sleeve is inserted in the small-diameter portion and is fixed thereto by means of strap-like tabs. A holder is fixed around the outer peripheral portion of the large-diameter portion, and is assembled in a ceramic disk via the holder.

Abstract: A cathode ray tube includes a phosphor screen and an electron gun. The electron gun includes an indirectly heated cathode structure and plural grid electrodes arranged in axially spaced relationship. The cathode structure includes a base metal having an electron emissive material coating and a heater for heating the base metal. The heater includes a major heating portion having a spirally wound heating wire and a pair of leg portions connected to opposite ends of the major heating portion. The major heating portion and an inner portion of each of the leg portions on a major-heating-portion side thereof are covered with an insulating coating, and the heater is welded to electrical conductors for applying a voltage thereto at an outer portion of each of the leg portions, the outer portion not being covered with the insulating coating.

Abstract: A cathode ray tube includes a phosphor screen and an electron gun. The electron gun includes an indirectly heated cathode structure and plural grid electrodes in axially spaced relationship. The cathode structure includes a cap-shaped base metal having an electron emissive material coating and a heater for heating the cap-shaped base metal. The heater includes a major heating portion having a spirally wound heating wire and leg portions, and each of the leg portions includes a first multilayer winding portion having heating wires wound spirally in plural layers and a second multilayer winding portion intermediate between the major heating portion and the first multilayer winding portion and having heating wires wound in plural layers.

Abstract: Picture display device comprising an electron gun with cathodes having an enhanced dissipation of heat by virtue of an enlarged surface or an increase of the emissivity of the surface.

Abstract: A cathode assembly (27) includes a thermally conductive insulating substrate (21) having a pair of opposing surfaces. A cathode base member (24) is formed on one surface of the insulating substrate, and a heating member (25) for heating the cathode base member is formed on the other surface of the insulating substrate. A heater electrode terminal (26) is fixed to the electrode of the heating member through a metal layer (26a). A first grid (30) is fixed to the insulating substrate to oppose the cathode base member through a predetermined space.

Abstract: The present invention discloses a cathode for an electron gun comprising a base metal mainly composed of nickel and containing one kind of reducing element at least, a metal layer mainly composed of tungsten, tungsten-nickel, or zirconium-tungsten on the upper side of the base metal, and an electron emitting material layer containing alkaline earth metal oxide including barium at least on the upper side of the metal layer. The metal layer is formed by spreading tungsten, tungsten-nickel, or zirconium-tungsten on the base metal and heating it to have particle smaller than that of the base metal, to increase its life cycle under a high current density load by ensuring a diffusion route of reducing element steadily, used for good generation of free radical barium atom.

Abstract: Problems with a conventional cathode for electronic tubes arose because metals composing the substrate were subjected to heat deformation, resulting in a relatively lage drift of cutoff voltage. The present invention diminishes the heat deformation of the substrate to obtain a cathode with a small drift of cutoff voltage. Particularly, heat expansion coefficients can be made uniform while metals in the metal layer are prevented from diffusing into the substrate. This is done by incorporating the same metals present in the metal layer into the metals composing the substrate, thereby supressing deformation of the substrate.

Abstract: A low power impregnated cathode consisting of a pallet, a cup, an inner sleeve, a cap, and an outer sleeve, is characterized in that the diameter of the pellet is less than at least one and half times of the thickness of the pellet, and is characterized in that an outer diameter of the bottom part of the outer sleeve is larger than an outer diameter of the top part thereof.

Abstract: A cathode for an electron tube includes a layer of a electron emitting substance containing alkaline earth metal oxides containing 0.01--20.0 wt % of both a lanthanum compound and a magnesium compound or a lanthanum-magnesium compound disposed on a base metal including nickel as a major component and tungsten as a minor component. The tungsten prevents embrittlement and ensures a continuing supply of fill barium in the electron-emitting substance. The cathode enjoys full interchangeability with the conventional oxide cathode and a 15-30% longer life span.

Abstract: An indirect cathode sleeve and manufacturing method thereof capable of substantially reducing electric power consumption of a heater disposed inside the cathode sleeve and simultaneously reducing a picture-producing time by oxidizing an inside surface of the cathode sleeve and reducing an outside surface thereof. The cathode sleeve includes a heater disposed inside the cathode sleeve; a base metal formed at the top of the cathode sleeve; an electron-emitting material layer formed at the outside surface of the base metal; and an indirect cathode sleeve including a black inside surface and a white outside surface.

Abstract: In an electron gun for a color cathode ray tube including a cathode structure having three electrodes, a control electrode and a screen electrode, and a plurality of focus electrodes and last accelerating electrodes for forming electron lenses, the cathode structure includes a rimmed electrode member, an insulating member inserted into the electrode member and having an indentation formed on the upper surface thereof, a field emission array cell having a base member which is inserted into the indentation, and a plurality of supporting members installed at the insulating member for pressing down on the upper surface of the edge of the field emission array cell which is inserted into the indentation toward the upper surface of the insulating member. Thus, the strength of attachment between the insulating member and a field emission device is improved.

Abstract: A color cathode ray tube includes a panel portion having a phosphor screen on its inside surface and suspending a shadow mask hanged closely spaced from the phosphor screen, a neck portion for housing an electron gun, and a funnel portion for connecting the panel portion to the neck portion. The electron gun is composed of a first plurality of grid electrodes spaced specified distances apart and arranged axially in a specified order, respectively, and fixed by insulating rods embedding the first plurality of grid electrodes therein, including a cup-shaped first grid electrode having a second plurality of in-line electron beam apertures in a bottom thereof and having the second plurality of cathodes incorporated therein. The cup-shaped first grid electrode is embedded in the insulating rods through metal tabs fixed thereto, and a thermal expansion coefficient T1 of the metal tabs and a thermal expansion coefficient T2 of the cup-shaped first grid electrode satisfy the following inequality, T1>T2.

Abstract: A cathode structure and an electron gun for a CRT adopting the same are provided. The cathode structure has an external case, an insulating member filled in the external case, a plurality of pins fixedly inserted into the insulating member and of which end portions extend from the upper surface of the insulating member, a field emission device (FED) unit attached on the insulating member, and a wire for electrically connecting the FED unit to the end portions of the pins. Electrons are emitted by a field effect rather than by thermal electron emission.

Abstract: An electric discharge tube or discharge lamp, in particular a flat-panel display screen, includes one or more low-temperature cathodes having a holder, which, optionally, is provided with a heating or cooling element, a conductive bottom layer which is applied to the holder, optionally a substrate with dispenser material, and a top coating of ultrafine particles having a nanostructure. The top coating has a surface layer consisting of an emitter complex formed from an emission material comprising several components. The cathodes have a high reliability and a long service life under a normal working load. The emission is stable, which contributes to a constant picture quality throughout the life of the discharge lamp or discharge tube. The discharge tubes or discharge lamps in accordance with the invention have short switching times and the advantage that their construction has been simplified and that their energy consumption is low.

Abstract: The present invention relates to a cathode assembly employing a cermet pellet and a method for manufacturing the same. The cathode assembly of the present invention has a good quality such as a low work function and an enhanced life span as compared with the conventional cathode assembly. Also, since the method for manufacturing a cermet pellet is more simplified than that of the cermet thin film, the cathode assembly employing the cermet pellet according to the present invention can be manufactured with ease and at a low cost.

Abstract: The present invention provides an electron gun cathode for CRTs including a sleeve, on which a cap having an electromagnetic radiation matter applied on its upper face, is fixed. A sleeve supporter that supports and is merged with this sleeve is inserted in the holder and, thus, securely fixed. Also, a number of through holes are formed in the circumference of the holder.

Abstract: A cathode ray tube has a cathode structure including a cathode body comprised of porous refractory metal impregnated with electron-emissive material, a metal cup for containing the cathode body therein, a metal sleeve having a closed end and mounting a heater therein, a cylindrical metal eyelet and a plurality of thin metal wires stretched across one end of the metal eyelet and suspending the metal cup and the metal sleeve concentrically with and in the cylindrical metal eyelet. The metal cup and the closed end of the metal sleeve are fixed with the plurality of thin metal wires interposed therebetween, and ends of the plurality of thin metal wires are welded to a metal flange formed at the one end of the metal eyelet. The metal cup can be welded to the closed end of the metal sleeve by an electron beam with the plurality of thin metal wires interposed therebetween.

Abstract: An improved cathode structure for a cathode ray tube includes a first metal tube which can receive an emission part and a heating element, a second metal tube constituting the cathode shielding, and means for retaining the first tube in position inside the second, wherein the retaining means are constituted by a single metal piece. In a preferential mode of implementation, the metal retention piece is constituted by a crown having branches extending in the direction of the axis of the crown.