RU2624915C1 - Electroluminescent flexible source of mini-neon light - Google Patents

Abstract

FIELD: electricity.

SUBSTANCE: electroluminescent extended flexible light source (EEFLS) consists of the following: the central electrode made of copper wire; the layer of barium titanate; the electroluminophore in polymeric binders; the transparent conductive layer; at least two current-conducting electrodes; the polymeric layer and the outer polymeric layer. Wherein a carbon black layer is deposited on the central electrode, into which strong electron acceptors are introduced in the form of antimony fluoride (SbF₅) and/or arsenic fluoride (SbF₅). The diameter of the central electrode lies in the range of 0.4-0.7 mm.

EFFECT: increasing the brightness, strength, electrical conductivity and service life of an electroluminescent extended flexible light source.

2 cl, 1 dwg, 1 tbl

Description

FIELD OF THE INVENTION

The invention relates to electroluminescent light sources and can be used in air, ground, underground and underwater emergency response services; when highlighting escape routes in buildings, bomb shelters; when designating various objects in the evening, in smoke, in fog; with the designations of road users and road workers in the evening, in low light; “Smart lighting” of cities, “smart” roads, etc.

State of the art

A flexible electroluminescent light source is known from the prior art ([1] RF patent No. 2124281, IPC Н05В 33/26, publ. 12/27/1998), consisting of two filamentous or wire electrodes on which filled polymer layers: graphite and electrically conductive carbon black are successively formed. in a binder, a dielectric with high dielectric constant in a binder, an electroluminophore in a binder, on top of which a common transparent electrically conductive layer based on an electrically conductive filler in the binder is applied. Dispersed barium titanate or titanium oxide is used as a dielectric with high dielectric constant, the electrically conductive filler is indium oxide doped with tin or antimony, or zinc oxide doped with gallium. The content of the doping element is 0.3-1.3 wt. % Nitrile butadiene rubber is used as a binder. The light source has a shell made of a flexible optically transparent dielectric material.

Known cable electroluminescent light source ([2] US patent No. 5485355, IPC Н05В 33/00, publ. 16.01.1996), containing at least two electrodes, mutually arranged so as to create electric fields between them when creating voltage; at least one type of powdered electroluminophore is dispersed in a dielectric binder and placed in such proximity to the electrodes to create effectively excited electric fields, the formation of which emits light of a certain color, in a transparent polymer shell that seals the electrodes and electroluminophore.

Known electroluminescent cable ([3] US patent No. 6855027, IPC Н05В 33/00, publ. 02/15/2005) containing at least one layer of organic electroluminescent material located on the fibers; there are electrodes on the layer that create an electric field when voltage is applied to activate a layer of organic electroluminescent material; a barrier layer is applied over the electrodes to reduce the permeability of oxygen, water vapor, and other chemically active substances to the underlying layers. The barrier layer includes either alternating sublayers of polymeric and inorganic material, or alternating sets of sublayers of polymeric materials and adjacent sublayers of inorganic materials. The color of the light can be adjusted by varying the layers containing inorganic and / or organic phosphorus materials.

Known electroluminescent light source ([4] US patent No. 5669930, IPC Н05В 33/00, published 09.02.1999), consisting of at least one flexible cable such as electroluminescent filament, each filament has a central electrode surrounded by an insulating layer of dielectric, on top which applied a layer consisting of a mixture of electroluminophore powder and a binder. The light source also includes a transparent electrode surrounding the layer of the mixture of electroluminophore powder. The pores formed in the mixture layer are filled with a transparent filler material.

The disadvantages of the above analogues are low brightness, low mechanical strength, including poor resistance to bending and short life.

SUMMARY OF THE INVENTION

The objective of the invention is to increase the brightness of an electroluminescent extended flexible light source (EPGIS) by increasing the diameter of the Central electrode without reducing flexibility and a slight increase in weight.

The technical result of the invention is to increase the brightness by 4.44 times, strength, electrical conductivity and the life of EPGIS.

The technical result is achieved by performing an electroluminescent extended flexible light source, consisting of sequentially arranged: a central electrode made of copper wire; barium titanate layer; electroluminophore in polymer binders; transparent conductive layer; at least two conductive electrodes; the polymer layer and the outer polymer layer. Moreover, a layer of carbon black is deposited on the central electrode, into which strong electron acceptors are introduced in the form of antimony fluoride (SbF ₅ ) and / or arsenic fluoride (SbF ₅ ). An electroluminescent extended flexible light source is characterized in that the diameter of the central electrode lies in the range of 0.4-0.7 mm.

Brief Description of the Drawings

FIG. 1 - a flexible light source.

The positions indicated in the figure:

1. Copper wire (central electrode)

2. Carbon black

3. Barium titanate

4. Electroluminophore

5. Transparent conductive layer

6. Conductive electrode ∅ 0.20 mm

7. Conductive electrode ∅ 0.20 mm

8. The polymer layer

9. The outer polymer layer

The implementation of the invention

One of the main criteria for choosing a particular light source is the brightness of the glow. Compared with such light sources as incandescent lamps, electroluminescent lamps, LEDs, the brightness of EPGIS is low. And having a number of undeniable advantages over the above light sources, EPGIS finds worthy application in a separate niche of contour light.

One of the main aspects that determine the brightness of EPGIS is the thickness of the central electrode made of copper. The brightness of EPGIS is directly proportional to the diameter of its central electrode. However, an increase in the diameter due to an increase in the amount of copper for the manufacture of the central electrode significantly affects the weight of EPGIS, and also significantly limits its flexibility.

The essence of the proposed technical solution is to increase the brightness of the glow EPGIS by increasing the diameter of the Central electrode EPGIS without reducing its flexibility and a slight increase in its weight. This effect is achieved by applying a layer of carbon black on the central electrode. Effective as an electrically conductive filler, carbon black has a large specific adsorption surface, high porosity and a small particle size, low content of volatile impurities, and a high degree of structure.

The principle of operation is based on the fact that when an alternating sinusoidal voltage is applied to the capacitor, an alternating electric field arises between its plates and the electroluminophore begins to emit light.

The central electrode (1) is a current conductor. The carbon black layer (2) is a current conductor that increases the luminous area. Barium titanate (3) serves as an insulator that isolates the central electrode from the phosphor. Electroluminophore (4) is a material that emits light (i.e., a substance that converts the energy absorbed by it into light radiation). A transparent conductive layer (5) is a transparent conductive electrode that evenly distributes current over the surface of the phosphor. Conductive electrodes (6) and (7) with a diameter of 0.20 mm are current conductors. The polymer (8) and external polymer (9) layers protect the wires from mechanical damage.

An example of a specific implementation is illustrated in figure 1. EPGIS is an electric cylindrical capacitor, between the plates of which there is an electroluminophore. The inner lining (central electrode) is a copper wire (1) with a diameter of 0.4-0.7 mm - this is the initial diameter, which is increased by applying a layer of carbon black. A carbon black layer (2) is deposited on the central electrode, into which strong electron acceptors, such as antimony fluoride (SbF ₅ ) and / or arsenic fluoride (AsF ₅ ), are introduced. Industrial carbon black has an average particle diameter of 10 to 300 nm. The density is ~ 2 g / cm ³ , the electrical conductivity of different grades varies widely. The most common brands have conductivity from 1 to 100 Ohm ^-1 × cm ^-1 . The introduction of strong electron acceptors (SbF ₅ , AsF ₅ ) into carbon black, forming the so-called layered compounds of carbon black, leads to an increase in its electrical conductivity to values exceeding the electrical conductivity of the best of conductors - copper. In our case, it is these compounds that are used as electrically conductive fillers to increase the diameter of the central electrode and increase the brightness of EPGIS. Next, layers of barium titanate (3), electroluminophore (4) in polymer binders, such as nitrile butadiene rubber, and a transparent conductive layer (5) are gradually applied to the carbon black layer (2). Two conductive electrodes (6) and (7) with diameters of 0.20 mm and 0.20 mm, respectively, are wound over a transparent conductive layer. A polymer layer (8) and an external polymer layer (9), which are made of polyethylene (PVC), are applied on top of two conductive electrodes. Their task is to protect the wire from mechanical damage. With this implementation of EPGIS, the area of the radiating surface increases 2.4 times.

Increase in brightness - achieved by increasing the diameter of the central electrode. The diameter of the central electrode increases due to the deposition of a layer of carbon black on the central electrode, the diameter of which is 0.4-0.7 mm. In this case, the diameter of the central electrode increases. This leads to an increase in the area of luminescence by 2.4 times. Hence the increase in brightness by 4.44 times.

This technical solution can be practically implemented in the designation and illumination of escape routes. Since static signals and light lamps in a situation of fire, explosion, industrial accident, etc. is insufficient, then on the basis of EPGIS it is possible to create evacuation systems for large masses of people that will avoid panic and unambiguously indicate the direction of evacuation from each room in the shortest and safest direction. Also, using EPGIS, it is possible to equip evacuation routes with running light paths, with which it would be possible to control the rate of evacuation.

Possessing great brightness (Table 1), EPGIS is visible at large distances, in various types of smoke, in fog, under water and can be used to indicate the boundaries of the highway, runway and railway platform, to indicate road users, when underwater search and rescue operations, for work in mines, for laying temporary mobile evacuation routes, designating entry-exit and search zones.

Claims (2)

1. Electroluminescent extended flexible light source, consisting of sequentially arranged: a central electrode made of copper wire; barium titanate layer; electroluminophore in polymer binders; transparent conductive layer; at least two conductive electrodes; a polymer layer and an external polymer layer, characterized in that a carbon black layer is deposited on the central electrode, into which strong electron acceptors are introduced in the form of antimony fluoride (SbF ₅ ) and / or arsenic fluoride (SbF ₅ ). 2. An electroluminescent extended flexible light source according to claim 1, characterized in that the diameter of the central electrode lies in the range of 0.4-0.7 mm.

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