Abstract:
A getter which can maintain an absorption ability and secure sufficient characteristics even when a high-temperature low-vacuum is experienced in a process as compared with a conventional getter. The getter has an undulation on the surface, and is formed by depositing Ti or a composition mainly containing Ti or Zr or a base surface mainly containing Zr.
Abstract:
To stabilize an emission current of cold cathode electron gun and extend its product life. A cold cathode electron gun comprises a cold cathode for emitting electrons by field-emission, a gate electrode for controlling the field-emission, a Wehnelt electrode which surrounds the cold cathode and the gate electrode, a first anode for accelerating electrons, and a second anode for constructing an electron lens together with the first anode. An inner diameter of the first anode is greater than a radius of flow of electrons which are emitted in the direction perpendicular to the optical axis of the electron lens.
Abstract:
A cathode ray tube has a phosphor screen and an electron gun. The electron gun includes an electron beam generating section and an electron beam focusing section for focusing an electron beam from the electron beam generating section onto the phosphor screen. The electron beam generating section and the electron beam focusing section are mounted in predetermined spaced relationship on plural insulator support rods. The electron beam focusing section includes at least one compound electrode formed of a first electrode member, a second electrode member and a plate-like electrode member sandwiched therebetween. The plate-like electrode member is fabricated from a material thicker than materials from which the first and second electrode members are fabricated. The plate-like electrode member is laser-welded to the first and second electrode members at points of edges of the first and second electrode members. The points of edges of the first and second electrode members are positioned so as not to face mounting tabs of the plate-like electrode member embedded in the insulator support rods, and edges of the plate-like electrode member extend by an approximately equal distance outwardly beyond the points of edges of the first and second electrode members welded to the plate-like electrode member.
Abstract:
The cathode ray tube apparatus comprises a main lens constructed by focus, intermediate, and final acceleration electrodes. The main lens includes a focusing area positioned in a side of the focus electrode, and a diverging area positioned in a side of the final acceleration electrode. A focusing force curve expressing the focusing force along the tube-axis direction in the focusing area has two convex parts respectively being at first and second levels, and a concave part provided between the convex parts and being at a third level sufficiently lower than the first and second levels. The third level is set to a lowermost level at which a focusing or diverging force is not substantially effected on the electron beam. An intermediate electrode having a non-circular shaped hole is positioned near an area of the lowermost level.
Abstract:
An electron gun fixer comprising bulb spacers fixed to an electron gun to be inserted into a bulb neck. Each of the bulb spacers has a supporting portion to be put into press contact with the inner surface of the bulb neck. The expression “R1≧R2>R3” holds for the supporting portion, where R1 is the radius of curvature in the cross section along the direction of insertion of the electron gun into the bulb neck, R2 is the curvature of a peripheral part in the cross section perpendicular to the direction of insertion, and R3 is the radius of curvature for the remaining parts in the cross section perpendicular to the direction of insertion. R2 is substantially equal to the radius of curvature R0 of the bulb neck.
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:
An in-line type color Braun tube having a fluorescent screen and a shield cup at an end of an electron gun, the shield cup including a cylindrical side wall and a bottom having a center electron beam passing hole and two side electron beam passing holes aligned in a horizontal direction. A convergence correcting member including a base and a pair of horizontal plates, the base and horizontal plates being a one piece member, and a bottom member of the base being cross-shaped and including two side electron beam passing holes and a center electron beam passing hole. A pair of horizontal plates sandwiches an electron beam passing through each of the side electron beam passing holes, in a direction vertical to the electron beam. The base is spot-welded to the bottom of the shield cup at an outer side of each of the side electron bottom beam passing holes proximate to a periphery of the bottom of the shield cup or at outer sides of the center electron beam passing hole along a branch of the cross-shaped base of the bottom member.
Abstract:
An electron-emitting source of this invention includes at least a carbon nanotube formed from a columnar graphite layer. Electron are emitted from the tip of the carbon nanotube.
Abstract:
An inline type electron gun assembly has a main lens for focusing three electron beams on a phosphor screen. A resistor is arranged in a cathode ray tube. A voltage obtained by dividing a high voltage with the resistor is applied to an intermediate electrode. Voltages of a focusing electrode, the intermediate electrode, and a final accelerating electrode that constitute the main lens are determined to increase sequentially. Electron beam holes in the intermediate electrode on the focusing electrode side, and electron beam holes in the intermediate electrode on the final focusing electrode side form vertically elongated holes longer in the vertical direction than in the horizontal direction. Electron beam holes in the focusing electrode on the intermediate electrode side and electron beam holes in the final accelerating electrode on the intermediate electrode side form open holes having no side wall portions. A color cathode ray tube having an electron gun assembly capable of improving resolving power can be provided.
Abstract:
A cathode ray tube has an anode and a focus electrode. The large-diameter cylinder portion of the focus electrode is disposed concentrically within a large-diameter cylinder portion of the anode. The anode and a first electrode facing a cathode side end of the focus electrode are electrically connected together within the cathode ray tube. The following relationship is satisfied: −LP+184.9≧LG4≧0.0004 LP3−0.1571 LP2+21.006 LP−922.41, where LG4 (mm) is an axial length of the focus electrode, and LP (mm) is a distance from a phosphor screen side end of the focus electrode to a center of a phosphor screen.