ELECTRO-OPTICAL DISPLAY AND METHOD OF MAKING SAME Russian patent published in 2015 - IPC H01J31/50 

FIELD: physics, optics.

SUBSTANCE: invention relates to converters for converting invisible electromagnetic radiation (infrared, X-ray, ultraviolet, gamma-radiation) into visible radiation. The invention can be used in analogue and digital display devices. The display is the form of a glass vacuum-sealed tablet-shaped stacked housing consisting of two glass covers - cathode and anode, having film electrode coatings that are vacuum-tight sealed at the edge by low-melting lead glass. A microcapillary plate is placed between the covers. The cathode and anode covers of the housing are made of heat-resistant glass, the anode cover is thin (0.5-1 mm) and the cathode cover is extremely thin (less than 0.5 mm). The cathode cover is reduced to a stack by polishing with a thin abrasive and by chemical-mechanical polishing. The microcapillary plate is mechanically, electrically and optically tightly connected to the anode and cathode covers by through technical adjustment of dimensions and atmospheric pressure on the cover of the assembled evacuated stack. The cathode is made of two incompatible versions of materials - non-sensitive or, conversely, sensitive to visual luminescence light. The anode film is made of transparent conducting material and has a refraction index and thickness which facilitate interference transmission of visual luminescence light. A phosphor and a gas-absorber are made in the form of nanopowder coatings on the surface of microcapillaries of the microcapillary plate. The nanopowders are deposited from a common suspension in a volatile liquid after "saturation" of microcapillaries, followed by evaporation when heating with light and simultaneous exposure of the microcapillary plate to ultrasound. The amount of phosphor and gas-absorber varies and is selected in specific versions of the displays by varying the composition of the suspension. The brightness and definition of the image of the finished device obtained at the output are controlled by varying voltage across the microcapillary plate in a wide range.

EFFECT: improved controllability of image parameters; longevity of the sensitive cathode; large specific surface area of the phosphor and gas-absorber coatings; broader operating functions and applications.

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