Abstract:
A display screen which includes a microtip electron source which is observerable through the microtip support. The screen includes a cathodoluminescent anode, transparent support and cathode conductors formed on the support. The conductors are meshed according to a first pattern which includes openings. A resistive layer formed on the support is meshed according to a second pattern and includes solid areas located in the openings of the first pattern. Microtips are formed on the solid areas. Grids are meshed according to the second pattern in an unmeshed insulating layer which is transparent and extends above the cathode conductors and the resistive layer in between them and the grids.
Abstract:
A cathodoluminescent anode is formed on an insulating substrate, while on another insulating substrate are formed cathode conductors, an insulating layer, a grid layer used for the formation of grids, holes in the insulating layer and the grid layer and microtips in the holes. Moreover, a thin insulating layer is formed on the grid layer in order to limit the current liable to flow between the anode and the grids. Another thin layer or film is formed on the thin insulating layer that is sufficiently conductive or resistive to prevent disturbance by the thin electrically insulating layer, of the electric field created between the microtips and the grids.
Abstract:
A device for sputtering a metallic material on a plate comprises a vacuum chamber provided with a linear conveyor carrying at least one plate, the plate surface to be processed being turned downward. At least two sputtering sources are disposed under the conveyor, perpendicularly to its moving direction. Each source is associated with a collimator. The sputtering sources and their associated collimators are disposed to coat the whole width of the plate.
Abstract:
Display unit by cathodoluminescence excited by field emission.It comprises a plurality of elimentary patterns, each having a cathodoluminescent anode and a cathode able to emit electrons. Each cathode comprises a plurality of electrically interconnected micropoints subject to electron emission by field effect when the cathode is negatively polarized compared with the corresponding anode, the electrons striking the latter, which is then subject to a light emission. Each anode is integrated to the corresponding cathode.Application to the display of stationary or moving pictures.
Abstract:
Electrolytic device for light display on a dark background comprising a light source which illuminates a cell formed by two insulating walls between which is an electrolyte. One wall has an electrode comprising a plurality of segments for display and the other wall has a counter-electrode. The display is obtained by electrochemical deposition of dark coating material on the electrode.
Abstract:
A method of control for a metal halide electrolytic display cell consists in passing a control current through the cell in a first direction during periods of erasure and in the opposite direction during writing periods, a zero control current being maintained during periods of holding in the erased state and during periods of holding in the written state. A low leakage current is superimposed on the control current and passes through the cell in the first direction, at least during the periods of holding in the erased state.
Abstract:
The method consists in forming a first insulating plate coated with an electrode, in depositing at the periphery of the plate a wall formed of a first material which is chemically inert with respect to the film and fusible at a first temperature, in passing through the wall a filler tube of a second material having a higher melting point than the wall, in forming a second transparent insulating plate coated with a semitransparent electrode, in sealing the tube in the wall and the first and second plates on the wall by heating the cell elements to a temperature at least equal to the first temperature and lower than the melting point of the second material, then in allowing the cell elements to cool.
Abstract:
A flare composition is passivated to prevent gas generation during curing at elevated temperatures by incorporating therein as a passivating agent a small amount of a polyalkylene oxide phosphate ester. The additive also serves to increase the pot life of the composition.