Abstract: The field emission cathode device includes an insulating substrate with a number of cathodes mounted thereon. A number of field emission units are mounted on the cathodes. A dielectric layer is disposed on the insulating substrate and defines a number of voids corresponding to the field emission units. The dielectric layer has an upper and lower section and disposed on the insulating substrate. The dielectric layer defining a plurality of voids corresponding to the field emission units. A number of grids disposed between the upper and lower sections, and wherein each grid are secured by the upper and lower sections of the dielectric layer.

Abstract: A directly heated thermionic flat emitter has an emission surface divided by slots into interconnects that have respective terminal lugs forming power leads arranged at a peripheral edge. A number of segments are connected by respective narrow webs to the outermost interconnects of the emitter but have no connection to one another. The webs are arranged and dimensioned such that practically no current can flow from the interconnects to the segments and so that thermal conduction to the segments is largely suppressed.

Abstract: A directly thermionic flat emitter is presented whose emitting surface contains meandering conductor tracks. The conductor tracks are formed by slots in the emitting surface. The slots are arranged as claimed in a pattern of cuts which comprises a multiplicity of straight slots (3; 8, 9) which run at least transverse to the course of the main current direction and are arranged in a plurality of rows offset from one another. Meandering current paths (4) are thereby produced.

Abstract: An organic electroluminescent device comprising an organic luminescent substance interposed between a pair of mutually opposed electrodes is characterized in that the device contains at least a compound having the following general formula (I) as the organic luminescent substance.

Abstract: An electron device employing an electron source including a polycrystalline diamond film having a surface with a plurality of crystallographic planes some of which exhibit a very low/negative electron affinity such as, for example, the 111 crystallographic plane of type II-B diamond. Electron devices employing such electron sources are described including image generation electron devices, light source electron devices, and information signal amplifier electron devices.

Abstract: An electrode is made of a metallic composite material including a matrix with embedded tubes having high burn-off resistance. A filler material, which differs from the material of the matrix and tubes, is used as a core material for the tubes. Such filler material promotes the emission of electrons from the electrode surface.

Abstract: The present invention relates to apparatus for generating electric signals. Basically, the disclosed apparatus comprises a cathode-ray-type tube wherein the electron-beam sweeps across an especially designed electron-receptor. By suitable design of the receptor in conjunction with the beam-deflecting signal, the disclosed apparatus generates many desired output signals.