Abstract:
PROBLEM TO BE SOLVED: To provide a piezoelectric-film-type electron emitter which enables suppression of reduction of electron emission quantity due to repeated use thereof, and which exhibits high durability. SOLUTION: This electron emitter 10 includes: a substrate 11; an emitter section 12 formed of a dielectric material; a first electrode 14 formed on the top surface 12a of the emitter section 12; and a second electrode 16 formed on the bottom surface 12b of the emitter section 12. The dielectric material forming the emitter section 12 contains a dielectric composition having an electric-field-induced strain of 0.07% or less. In this case, the electric-field-induced strain is percent deformation under application of an electric field of 4 kV/mm, as measured in a direction perpendicular to the electric field. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
Disclosed are methods and devices suitable for generating electron beams and pulses of radiation. Specifically, in some disclosed embodiments, multiple emitting electrodes of a ferroelectric emitter are sequentially activated, generating a relatively long electron beam pulse that is substantially a series of substantially consecutive short electron beam pulses generated by the sequentially-activated individual emitting electrodes.
Abstract:
Provided is a piezoelectric-film-type electron emitter of high durability exhibiting suppressed reduction in electron emission quantity, which reduction would otherwise occur with repeated use of the electron emitter. The electron emitter includes a substrate, a lower electrode, an emitter layer, and an upper electrode. The upper electrode has a plurality of openings, and an emitter section located on the top surface of the emitter layer is exposed through the openings to a reduced-pressure atmosphere. The electron emitter is configured so that when a pulse drive voltage Va is applied between the lower electrode and the upper electrode, electrons are accumulated on the emitter section, and then the electrons are emitted toward the reduced-pressure atmosphere. The emitter layer contains a primary component (i.e., a ferroelectric composition) and an additional component. The additional component contains a transition metal oxide of high oxidation number which can serve as an oxidizing agent by being converted into an oxide of the transition metal of lower oxidation number.
Abstract:
A higher performance dielectric device is provided. An electron emitter (10A) applying the dielectric device according to the present invention includes an emitter formed of a dielectric (12), and an upper electrode (14) and a lower electrode (16) to which a drive voltage is applied to cause electron emission. The emitter includes plural dielectric particles (12e), and plural dielectric particles of smaller particle size (12f) which are filled in spaces between the plural dielectric particles. The emitter having the aforesaid construction is formed by an aerosol deposition method or a sol impregnation method.
Abstract:
A PED is constituted by arranging signal lines (18a, 18b) and scanning lines (18c, 18d), in the form of a matrix, on the inner surface (4a) of a rear substrate and by forming PZT films (24), which are used as electron-emitting members, at the intersections of the signal lines and the scanning lines. When a voltage is applied between element electrodes (21, 22) connected to the lines, each PZT film (24) emits an electron beam having a cross-section shape that depends on the shape of the PZT film (24).
Abstract:
A light source (10D) has a rear glass substrate (200) and a front glass substrate (202) having a plate surface disposed in facing relation to a principal surface of the rear glass substrate (200). The plate surface of the front glass substrate (202) is coated with a phosphor. A two-dimensional array of electron emitters (12B) is disposed on the principal surface of the rear glass substrate (200). A space (230) defined between the rear glass substrate (200) and the front glass substrate (202) is filled with a gas (232). The gas (232) may be an Hg (mercury) gas or an Xe (xenon) gas.
Abstract:
An electron-emitting element includes an electric field applying portion (1) composed of a dielectric, a first electrode (2) formed on one surface of the electric field applying portion, and a second electrode (3) being formed on the surface and forming a slit in cooperation with the first electrode, and is formed on a substrate (4).
Abstract:
Disclosed is a cold cathode (1) for use in discharge lamps, including in discharge lamps (6) operating with a dielectrically hindered discharge, comprising two electroconducive electrodes facing each other, between which a ferro-electric material is sandwiched. At least one of the electrodes presents one or more openings. When the cathode is operating, a voltage of quickly alternating polarity is applied to both electrodes, thereby freeing electrons on the surface of the ferro-electric material. The working voltage of the discharge lamp causes an acceleration of said electrons, which pass through the openings towards the anode (8) and are used for igniting the discharge lamp and keeping it in operating mode.
Abstract:
Beschrieben wird eine Quelle für gepulste Elektronenstrahlen, welche großflächig zur Emission angeregt und entweder als Gesamtheit oder individuell in ihrer Pulsfrequenz, Energie und Stromstärke moduliert werden können. Die Kathode kann als Elektronenkanone für Anwendungen in Beschleunigern und freien Elektronenlasern, aber auch in Hochleistungsradiofrequenz- und Kathodenstrahlröhren dienen. Die Anwendungen als modulierte Gigaherzquelle und als Quelle zur parallelen Bildinformationsverarbeitung in kompakten Kathodenstrallröhren lassen sich als Hauptmerkmale nennen.