Abstract:
A cathode-ray ultraviolet light source comprising: an elongated glass envelope having a first end and second end, the glass envelope defining an evacuated volume; an electron gun positioned within the evacuated volume proximate to the first end and being capable of developing an electron beam; a target disposed within the evacuated volume between the first and second end of the glass envelope, the target comprising a phosphor material covered with a reflective metal film; and an electron beam focusing and deflecting mechanism disposed within the evacuated volume between the electron gun and the target to direct the electron beam towards the reflective metal film of the target.
Abstract:
Изобретение относится к плоскому автоэмиссионному источнику света, содержащему основание (1), стеклянную колбу (2) и катодно- модуляторный узел (10). Основание (1) соединено со стеклянной колбой (2), включающей боковую поверхность (3) и выходное окно (4). Выходное окно (4) содержит внутреннюю поверхность (5) и наружную поверхность (6). На внутренней поверхности (5) выходного окна (4) нанесен люминесцентный слой (7) с проводящим покрытием (8). Стеклянная колба (2) включает также штенгель (9). Катодно-модуляторный узел (10) установлен на основании (1 ) и включает автокатоды (11 ) и модулятор (12) с поверхностью (13), расположенной в сторону проводящего покрытия (8). Согласно изобретению, катодно-модуляторный узел (10) представляет собой плоскую конструкцию параллельную выходному окну (4). Модулятор (12) механически сопряжен с автокатодами (11), выполненными в виде плоских элементов. Расстояние (hi) между проводящим покрытием (8) и катодно-модуляторным узлом (10) равно расстоянию (h2) между центрами автокатодов (11) с погрешностью не более 10 %.
Abstract:
The present invention generally relates to a field emission light source and specifically to a field emission light source adapted to emit ultraviolet (UV) light. The light source has a UV emission member provided with an electron-excitable UV emitting material. The material is at least one of LuPO 3 :Pr 3+ , Lu 2 Si 2 O 2 :Pr 3+ , LaPO 4 :Pr 3+ , YBO 3 :Pr 3+ and YPO 4 :Bi 3+ .
Abstract:
A flat panel device (300) includes a spacer (308) for providing internal support. The spacer can be made of ceramic or glass-ceramic. Spacer surfaces exposed within the flat panel device are treated to reduce secondary emissions and prevent charging of the spacer surfaces. A light-emitting structure contains a main section (302), a pattern of dark ridges (314) situated along the main section, and a plurality of electron-activated light-emissive regions (313) situated in spaces between the ridges. The dark ridges extend further away from the main section than the light-emissive regions to form a raised black matrix. When the light-emitting structure is used in an optical display, the raised black matrix contacts spacers (308) and, in so doing, protects the light-emissive regions from being damaged. The light-emitting structure can be formed according to various techniques of the invention.
Abstract:
The present invention relates to afield emission cathode, comprising an at least partly electrically conductive base structure, and a plurality of electrically conductive micrometer sized sections spatially distributed at the base structure, wherein at least a portion of the plurality of micrometer sized sections each are provided with a plurality of electrically conductive nanostructures. Advantages of the invention include lower power consumption as well as an increase in light output of e.g. a field emission lighting arrangement comprising the field emission cathode.
Abstract:
Disclosed is a light-emitting device (1) comprising a light-emitting layer (2) containing a phosphor and at least two electrodes (6, 7). The light-emitting device (1) also comprises at least two electrically insulating layers (2, 9) having different dielectric constants, and one of the electrically insulating layers (2, 9) is the light-emitting layer (2). Either one of the electrodes (6, 7) is formed in contact with one of the insulating layers. Consequently, a light-emitting device which is capable of emitting a light by utilizing surface discharge can be produced at low cost. The light-emitting device has a good luminous efficiency, and the power consumption can be low when a large-screen display is produced using this light-emitting device.
Abstract:
A gas discharge tube (1), wherein a side tube member (22) is formed of a metal, a metal joint portion (15b) being provided on an outer circumferential portion of a stem (4) and combined with a joint portion (16) of the side tube member (22), which comprises a metal, by welding, whereby it becomes possible to attain the facilitation of an assembling operation owing to the welding method, as well as the miniaturization of the gas discharge tube (1) itself, the handling efficiency of the gas discharge tube being also improved greatly since the side tube member (22) is formed to small dimensions and made of a metal, the side tube member (22) made of a metal promoting the diversification of the shape of the gas discharge tube (1) and promising mass-production thereof.
Abstract:
A gas discharge tube (1), wherein a gas is sealed in a sealed case (2) at least a part of which is light transmissible, to generate electric discharge between an anode (6) and a cathode (9) provided in the sealed case (2), whereby predetermined light is discharged from a light transmission portion (14a) of the sealed case (2) to the outside, comprising the anode (6) placed on an insulating anode support member (5), a converging electrode support member (7) placed on a surface, which surrounds the anode (6), of the anode support member and having an opening (7a) at which the anode (6) is exposed, a converging electrode (8) which has a converging opening (8a) at a front surface of the opening (7a) so that the opening (8a) projects toward the anode (6), and which is placed on the support member (7), and a cathode (9) placed on the anode support member (5) or converging electrode support member (7) so as to be spaced from the converging opening (8a).