Light filtering plate with function of preventing electromagnetic radiation and filtering light for plasma display

Abstract

The filter plate includes base plate of transparent resin or base plate of glass. Using method of consecutive magnetron sputtering coats film layer capable of anti electromagnetic radiation and filtering function on one surface of base plate. Being in use for preventing coated film layer from oxidating or eroding, resin layer is coated on the film layer. Being bound through conducting resin, the metal platinum piece being as extraction electrode is contacted to the coated film layer. The said coated film layer includes 13 layers or 17 layers composed of repeated film series of TiO2/ZnO (or SnO2)/Ag/NiCrOx (or NiCrNx)/TiO2. Resin layer is methyl silicone resin. The invention reduces cost greatly, possesses advantages of high production efficiency, high intensity, high transmittance, anti electromagnetic radiation, good light filtering effect, and long service life.

Description

Technical field: [0001] The invention relates to a filter plate in a display device, in particular to a filter plate with the functions of preventing electromagnetic radiation and filtering light in a plasma display (PDP). Background technique: [0002] The anti-reflection, anti-electromagnetic radiation and filtering functions of the current PDP filter plate are formed in this way: a plastic film plated with an anti-reflection film layer is pasted on the outer surface of a piece of glass, and an anti-reflection film formed by two layers of plastic is pasted on the other side. Diaphragms for electromagnetic radiation and light filtering functions. One of the layers is to form a metal conductive grid on the diaphragm by photolithography or wire mesh wiring method to form an anti-electromagnetic radiation function. On this layer of film with metal wires or wire grids, adopt the method of brushing a paint film to form a film layer or pasting it with an orange light-attenuating...

AI Technical Summary

Problems solved by technology

This kind of film layer composed of a metal oxide and a binder formed by a solvent or solution involves environmental protection issues and pollution in terms of the process, and the thickness and visible light transmittance of the formed film are difficult to control, and the product cannot be detected on the production line. The qualified rate cannot be controlled and the qualified rate is low, the fastness of the film layer is not enough, and the surface resistivity of the uppermost surface of the film layer, the upper side of the protective layer, because of the combination of polymer resin, the surface resistivity is higher than that without adding the protective layer. High, which reduces the EMI shielding function. For the three-layer silver film structure, it solves the so-called "white spot" problem, but reduces the EMI shielding ability of the three-layer silver

This document has mentioned the control method that suppresses silver film layer corrosion or claims to reduce " white spot ", but because only adopt this layer protective layer on the transparent high-refractive index film layer of the outermost layer of three-layer silver structure film layer, The effect of EMI shielding is not enough, the surface resistivity can only reach 2Ω / □ at best, and it is not up to the standard of less than 1.5Ω / □ for household appliances. There is no method or scheme in the literature to combine each layer of silver film layer with transparent high refractive index The film layers are divided into three layers (if there are four layers in the case of a four-layer silver film layer structure), there are reports or hints about adding a metal oxide film layer, and there is no continuous magnetron sputtering method to plate these three or four layers of metal. Oxide such as NiCrOx film and other ZnO / Ag / TiO 2 Reports and hints on the organic combination of thin films to improve the shielding ability, and at the same time to filter the infrared light and ultraviolet light

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