Abstract:
An electron emitter, such as for a display, has a substrate and regions of n-type material and p-type material on the substrate arranged such that there is an interface junction between the regions exposed directly to vacuum for the liberation of electrons. The p-type region may be a thin layer on top of the n-type region or the two regions may be layers on adjacent parts of the substrate with adjacent edges forming the interface junction. Alternatively, there many be multiple interface junctions formed by p-type particles or by both p-type and n-type particles. The particles may be deposited on the substrate by an ink-jet printing technique. The p-type material is preferably diamond, which may be activated to exhibit negative electron affinity.
Abstract:
A cathode structure for use in field emission display (FED) devices includes four layers. A first layer consists of conducting lines supported on an insulating substrate. A second layer consists of thin non-conducting lines crossing the conducting lines. A third layer consists of a thick layer of non-conducting material with holes centered between the thin non-conducting lines of the second layer and extending over a portion of the thin non-conducting lines. A fourth layer consists of conducting lines containing holes of the same dimension as and aligned with the holes in the third layer exposing portions of the conducting lines of the first layer and of the non-conducting lines of the second layer. Emissive material is deposited on the exposed portions of the conducting lines of the first layer to produce a cathode for an FED device. The four-layer cathode structure improves emission characteristics such as current density and uniformity for planar edge emitters and surface emitters.
Abstract:
A flat panel display and a method for forming a carbon nanotube based flat panel display. In one embodiment, the flat panel display includes a barrier layer formed between a catalyst layer upon which microstructures of carbon nanotubes are formed and a resistor layer. The barrier layer acts as an anti diffusion layer between the catalysts layer and the resistor layer to prevent the catalyst layer from diffusing into the resistor layer during the growing of the carbon nanotubes. The barrier layer also enhances the adhesion characteristics of the catalyst layers to enable the uniform growth of the carbon nanotube structures on the catalyst layer.
Abstract:
A field emission cathode device consisting of an electrically conducting material and with a narrow, rod-shaped geometry or a knife edge, to achieve a high amplification of the electric field strength is characterized in that the electron-emitting part of the field emission cathode at least partly has preferred cylindrical host molecules and/or compounds with host compounds and/or cylindrical atomic networks, possibly with end caps with diameters measuring in the nanometer range.
Abstract:
A cold cathode discharge device with high efficiency of light emission and long life is prepared by a cold cathode having both high secondary electron emission and anti-spattering property. Using carbon system cold cathodes constituted of a mixed phase of diamond and graphite, a cold cathode discharge device with high efficiency of light emission and long life is realized. It is desirable that an element having a wavelength of light emission equal to or shorter than 200 nanometers should be mixed in the discharge gas.
Abstract:
The present invention discloses an organic EL device, including: a transparent substrate having a display region and a non-display region, the display region having a pixel region; first electrodes formed on the display region of the substrate and spaced apart from each other; EL light-emitting layers formed on the portions of the first electrode corresponding to the pixel region; and second electrodes formed over the display region and having a light absorbing layer interposed therein.
Abstract:
To provide a cold cathode element, which has a high practicability and is capable of emitting electrons sufficiently even at a low voltage applied. The cold cathode element emits electrons by application of an electric field to the element and is formed of an amorphous carbon film, the refractive index n of a surface of the film being equal to or larger than 2.5.
Abstract:
An electron emitting source device made of crystal material has a cleavage plane and a plane perpendicular thereto. An electron beam to be emitted from the crystal material in parallel to the direction perpendicular to said cleavage plane. The crystal material has a first cutting plane which is substantially parallel to the cleavage plane and a second cutting plane which is substantially perpendicular to the first cutting plane.