Abstract: In a gas discharge tube in accordance with the present invention, one or both of the inner wall face and outer wall face of a side tube body are provided with a coating made of a glass material or ceramics. As a result, the side tube body can be made of various materials regardless of properties of the gas filling the inside, whereby the gas discharge tube can have a wider range of processed forms and smaller dimensions at the same time, and its mass production can freely be carried out.

Abstract: A short-arc discharge lamp (1) is provided with a translucent lamp vessel (10) which is closed in a gas-tight manner and which is provided with an ionizable fill. A first and a second electrode (11a, 11b) are arranged in the lamp vessel (10) which are each connected to its own current conductor (12a, 12b) which extends to outside the lamp vessel. A starting antenna (2) is arranged near to the lamp vessel, which antenna is connected to a further current conductor (24). The starting antenna comprises an antenna container (20) and a further electrode (22) which antenna container (20) is closed in a gas-tight manner and contains an ionizable fill, the further electrode (22) being connected to the further current conductor (24). This makes it possible to realize a shorter reignition time by means of a higher reignition voltage on the starting antenna while spark-over from the starting antenna (2) to the lamp vessel (10) is avoided.

Abstract: An inductively driven gas discharge lamp assembly (20,40) which includes an electrodeless lamp (12,12′), an inductive drive coil (14), and a flux concentrator (22,42) disposed about the drive coil. The drive coil (14) is wound about the lamp (12,12′), which has a neon or other ionizable gas fill that provides a visible plasma discharge upon energization by the drive coil. The flux concentrator (22,42) can comprise a sleeve (24,44) of magnetically permeable material, such as ferrite, which confines the magnetic field generated by the drive coil (14). The flux concentrator (42) can include an end piece (46) that further confines the magnetic field at one end of the drive coil and c include a core piece (48) that extends into a central recess (50) within the lamp (12′) to concentrate the magnetic flux at a particular region within the lamp where the plasma discharge is primarily located.

Abstract: A cathode ray tube includes a phosphor screen, an electron gun having a plurality of electrodes, a deflection device, and a plurality of magnetic pieces being disposed on opposite sides in a direction of scanning line of an electron beam of a trajectory of and undetected electron beam in a magnetic deflection field generated by the deflection device. The plurality of magnetic pieces have a portion extending in a direction of an axis of the cathode ray tube on each of the opposite sides. The portion includes a pair of parts disposed above and below a plane containing the axis and the scanning line and having a first axial length greater than a second axial length of the portion as measured in the plane.

Abstract: An impregnated cathode whose initial electron emitting performance, lifetime property, and insulating property for an electron gun are excellent and that is suitable for mass production, and a method for manufacturing the same. In the impregnated cathode, the porosity of the sintered body of porous metal is continuously increased as the distance in the depth direction from an electron emitting face is increased. A pellet of sintered body of metal raw material has pores in it. The pores are filled with electron emitting material. The porosity is continuously increased as the distance in the depth direction from an electron emitting face is increased. Thus, since the discontinuity inside the pellet is not formed, a reaction generating free Ba continuously and smoothly proceeds on the entire pellet. In addition, since raw material powder having more than one kind of particle size is not necessary to be used, the manufacturing process can be simplified. Moreover, various functions such as lifetime property, etc.

Abstract: A plasma display panel has, on the display-side inner surface of one substrate out of a pair of substrates disposed opposite to each other via a discharge space, plural pairs of row electrodes extending in parallel in a first direction with each discharge gap held therebetween, dielectric layers for the row electrodes with respect to the discharge space; and on the back-side inner surface of the other substrate disposed opposite to the display-side substrate, plural pairs of column electrodes extending in a second direction perpendicularly crossing the first direction and forming unit luminous areas in intersecting portions with respect to the respective pairs of row electrodes, and belt-like partition walls for partitioning the discharge space into the unit luminous areas in the first direction.

Abstract: A flat panel lamp has internal walls forming a serpentine discharge path between two internal electrodes. Two glow mode electrodes in the form of interdigitated combs are laid on the outside of the front panel of the lamp, on top of the walls. The internal electrodes are connected to a first drive circuit; the glow mode electrodes are connected to a second drive circuit, which drives them at a frequency of about 10 MHz. At high brightness, only the internal electrodes are operative; at low brightness, only the glow mode electrodes are operative; and at intermediate brightness the two sets of electrodes are alternately energized.

Abstract: The invention proposes arranging a getter (7) made from niobium on the electrode rod (4) of a mercury short-arc lamp, the two following conditions being fulfilled: D>1.8·d and &agr;≧20°. In this case, D and d denote a diameter of the relevant electrode head (2) or the associated electrode rod (4), and &agr; denotes an angle which is defined by the longitudinal axis of the electrode and an imaginary connecting line between the end of the getter (7) averted from the electrode head, and a point on the perpendicular, running through the end of the electrode rod on the electrode head side, to the electrode longitudinal axis. The point mentioned corresponds to the projection of the maximum radius of the lateral surface of the electrode head onto this perpendicular. An improved maintenance of the lamp is thereby achieved.

Abstract: On a substrate 1 having at least one conductive surface are formed an insulating film 2 and a conductive gate film 3. In a predetermined area, an opening reaching the substrate 1 is formed and a conical emitter electrode is formed in the opening. A shield member 13 is formed, which spatially shields at least part of the insulating film 7 from the emitter electrode.

Abstract: A short arc lamp in which cylindrical retaining bodies can be easily and reliably attached in upholding parts of the electrodes on a temporary basis and in which also the disadvantages which are caused by an anomalous discharge immediately after starting of lamp operation can be eliminated are achieved in a short arc lamp in which a cathode and an anode opposite one another in an arc tube having side parts on opposite sides, in which the upholding parts of the cathode and anode electrodes are inserted and held in cylindrical retaining bodies, and in which the cylindrical retaining bodies are supported in the shrunken regions of the side tubes by the upholding parts of the electrodes being wound with coil components which border the faces of the cylindrical retaining bodies that face the electrodes, and by the cylindrical retaining bodies being temporarily attached by these coil components.

Abstract: The present invention is a baseplate that has a supporting substrate with a primary surface upon which an array of emitters is formed. An insulator layer with a plurality of cavities aligned with respective emitters is disposed on the primary surface, and an extraction grid with a plurality of cavity openings aligned with respective emitters is deposited on the insulator layer. The extraction grid is made from a silicon based layer of material. A current control substrate formed from the silicon based layer of material of the extraction grid is provided such that the current control substrate is electrically isolated from the extraction grid and electrically connected to the emitters. The current control substrate has sufficient resistivity to limit the current from the emitters.

Abstract: A method for fabricating a field emission display (100) includes the steps of providing a cathode plate (102), providing an anode plate (104), providing a spacer substrate (160) made from a bulk spacer material (109), cutting the spacer substrate (160) to define a spacer (108) having a surface (107), passivating the surface (107) of the spacer (108) using the bulk spacer material (109) to form a passivation layer, and disposing the spacer (108) between the cathode plate (102) and the anode plate (104). A field emission display (100) which includes a cathode plate (102) having a plurality of electron emitters (124), an anode plate (104) opposing the cathode plate (102), and a spacer (108) extending between the cathode plate (102) and anode plate (104). The spacer (108) has a passivation layer made from bulk spacer material (109).

Abstract: An electron gun for a cathode-ray tube for image display including a cathode having a sleeve made of a refractory metal, a support provided at one end of the sleeve and made of a refractory metal containing a reducing element, a heater arranged in a space defined by the sleeve and the support, and an electron emissive material layer for emission of electrons. The electron emissive material layer is mainly made of an oxide of an alkaline earth metal and contains an oxide of a rare earth metal. The electron emissive material layer is prepared by forming a first layer on the support by spraying, and forming a second layer on the first layer by spraying. A dispersion amount of an oxide of a rare earth metal in the second layer is larger than that in the first layer and a first grid electrode is provided adjacent the cathode. The grid electrode has an electron beam passage hole for the electrons from the electron emissive material layer, and the electron beam passage hole has a diameter which is less than 0.4 mm.

Abstract: A color cathode ray tube having a panel to which a fluorescent layer is applied, a slim neck portion with an electron gun, a funnel joined to the panel, and a stem with the electron gun sealed to the neck portion, wherein if an inner diameter of the neck portion and an outer diameter of the stem equal a and f, respectively, an interval between the neck portion's inner diameter and the stem's outer circumference meets the condition of 0.2≦(a−f)/2≦3.0, and the neck portion's outer diameter equals 23.0 mm to 28.5 mm.

Abstract: A field emission display device utilizing a nanotube emitter layer instead of microtips and a method for fabricating such device by a thick film printing technique instead of thin film deposition and photolithographic methods are provided. In the device, various layers of materials including a layer of nanotube emitter material can be formed by a thick film printing technique on a glass plate. The nanotube emitter material can be nanotubes of carbon, diamond or a diamond-like carbon material that is mixed with a solvent-containing paste. The resulting paste has a consistency suitable for a thick film printing process. The nanotubes should have diameters between about 30 nanometers and about 50 nanometers for use in the present invention device. The screen printing or the thick film printing method of the present invention can be carried out at substantially lower cost than the thin film deposition and photolithographic methods.

Abstract: A low-pressure mercury-vapor discharge lamp is provided with a discharge vessel and a first and a second end portion (12a). The discharge vessel encloses a discharge space provided with a filling of mercury and an inert gas in a gastight manner. Each end portion (12a) supports an electrode (20a) arranged in the discharge space. An electrode shield (22a) encompasses at least one of the electrodes (20a) and is made from a ceramic material. Preferably, the electrode shield (22a) is tubular in shape with a lateral slit directed towards the discharge space.

Abstract: A pressure-sensing ignition device (10) for use in a spark ignition system of an internal combustion engine. The device (10) generally includes a body (14) having a longitudinal axis of symmetry and an internal chamber (12). Disposed in the chamber (12) adjacent one end of the body (14) is an orifice (44) that vents the chamber (12) to the exterior of the body (14). An electrode (18) and an optical pressure transducer (24) are present within the body (14). An optical cable (22) is connected to the transducer (24) for transmitting an optical pressure signal. Means (20) is provided for conducting a current to the electrode (18) via the optical cable (22).

Abstract: A method for preparing a non-thermal plasma reactor reactor characterized by multiple concentric exhaust channels and multiple concentric conductor channels having alternating polarity, each connected to its respective polarity via bus paths is provided. The method comprises forming a substrate having a curved, swept shape comprising a thick outer wall surrounding a plurality of channels separated by dielectric barriers, coating selected channels with a conductive material to form conductor channels capable of forming an electric field around uncoated exhaust channels. Masking is employed to effect selective coating of conductive material while preventing the conductive material from being applied to non-value added areas. A first mask is employed to apply conductive material forming conductor channels and bus paths. An additional mask may be employed to cover the conductor channels and bus paths with a sealant. The method minimizes manufacturing steps as compared to prior methods.

Abstract: A cathode structure suitable for a flat-panel display contains an emitter layer (213) divided into emitter lines, a plurality of electron emitters (229, 239, or 230) situated over the emitter lines, and a gate layer (215A) having an upper surface spaced largely above the electron emitters. The gate layer has a plurality of gate holes (215B) each corresponding to one of the electron emitters. The cathode structure further includes a carbon-containing layer (340, 240, or 241) coated over the electron emitters and directly on at least part of the upper surface of the gate layer such that at least part of the carbon-containing layer extending along and above the gate layer is exposed.

Abstract: The glass funnel for a cathode ray tube includes a cylindrical funnel neck (2); a funnel body (4) having successive transverse cross-sections that change over from a substantially circular shape to a substantially rectangular shape with cross-sectional areas growing continuously in a direction moving away from the funnel neck and a parabolic region (3) arranged between the funnel neck and the funnel body and having respective connecting sections to the funnel neck and the funnel body having corresponding substantially circular cross-sections. The parabolic region (3) has at least one part with a substantially rectangular cross-section and the at least one part is located between the respective connecting sections to the funnel neck and the funnel body. When a cathode ray tube is made from the glass funnel the electron gun is located in the funnel neck and the deflecting coil is arranged around to the parabolic section so that it is substantially closer than in the prior art cathode ray tube.