CN114255679A - Electroluminescent signboard and preparation method thereof - Google Patents
Electroluminescent signboard and preparation method thereof Download PDFInfo
- Publication number
- CN114255679A CN114255679A CN202111497829.3A CN202111497829A CN114255679A CN 114255679 A CN114255679 A CN 114255679A CN 202111497829 A CN202111497829 A CN 202111497829A CN 114255679 A CN114255679 A CN 114255679A
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- electroluminescent
- transparent
- film
- signboard
- reflective film
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F13/00—Illuminated signs; Luminous advertising
- G09F13/20—Illuminated signs; Luminous advertising with luminescent surfaces or parts
- G09F13/22—Illuminated signs; Luminous advertising with luminescent surfaces or parts electroluminescent
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F13/00—Illuminated signs; Luminous advertising
- G09F13/20—Illuminated signs; Luminous advertising with luminescent surfaces or parts
- G09F13/22—Illuminated signs; Luminous advertising with luminescent surfaces or parts electroluminescent
- G09F2013/225—Illuminated signs; Luminous advertising with luminescent surfaces or parts electroluminescent with electroluminescent lamps
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Illuminated Signs And Luminous Advertising (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The invention relates to an electroluminescent signboard and a preparation method thereof, wherein the preparation method of the electroluminescent signboard comprises the following steps: and attaching a transparent reflective film on the prepared electroluminescent film, and fixing the electroluminescent film on a substrate to obtain the electroluminescent signboard. By means of the method, the self-luminous mode of electroluminescence is combined with the reflective film, so that the problems of no luminescence at night, low electroluminescence brightness and the like of the common signboard can be effectively solved, and a good indication effect is obtained.
Description
Technical Field
The invention relates to the technical field of signboard processing, in particular to an electroluminescent signboard and a preparation method thereof.
Background
The existing signboard mostly adopts the reflective membrane mode, namely, the reflective membrane is attached on the pattern, and the signboard does not emit light by itself, and when night, the signboard can not be displayed by means of external light sources such as automobiles and street lamps, and can not play a warning role for pedestrians who cannot take light sources, and the like, and potential safety hazards exist.
Disclosure of Invention
The invention provides an electroluminescent signboard and a preparation method thereof, aiming at solving the defect that the content of the existing signboard cannot be displayed under the condition of no external light source and cannot have an indication effect due to only depending on reflection.
In a first aspect, to solve the above technical problem, the present invention provides a method for preparing an electroluminescent signboard, including:
and attaching a transparent reflective film on the prepared electroluminescent film, and fixing the electroluminescent film on a substrate to obtain the electroluminescent signboard.
The invention has the beneficial effects that: by combining electroluminescence and a reflective film, the problems of no luminescence at night, low electroluminescence brightness and the like of the common signboard can be effectively solved, and a better indication effect is obtained.
Further, the preparation process of the electroluminescent film comprises the following steps:
and sequentially preparing a first light-emitting layer and a dielectric layer on the first transparent conductive film by utilizing a screen printing or coating process, and preparing an electrode on the dielectric layer to obtain the electroluminescent film.
The beneficial effect who adopts above-mentioned improvement scheme is: under the condition of no external light source, such as at night, the electroluminescent film can be electrified to emit light, so that the identification content is clearly displayed, and meanwhile, the background film is self-luminous, so that the light scattering is small, the contrast of the identification content is high, and a better identification effect can be achieved.
Further, the preparing the electrode on the dielectric layer includes:
and preparing a back electrode on the dielectric layer by utilizing a screen printing or vacuum coating process.
The beneficial effect who adopts above-mentioned improvement scheme is: the manufacturing is simple and easy to realize, and the electroluminescent effect can be ensured.
Further, the transparent reflective film includes a first transparent microprism reflective film, attaching the transparent reflective film on the electroluminescent film includes:
and attaching the first transparent microprism reflective film to the first transparent conductive film.
The beneficial effect who adopts above-mentioned improvement scheme is: the microprism reflecting film is attached to the surface of the electroluminescent film to increase the reflecting effect, so that the problem of low brightness of electroluminescent cold light can be effectively solved, and the identification content can be displayed clearly in a long distance by utilizing the reflection and self-luminescence.
Further, the substrate is a transparent substrate, the electrode is a second transparent conductive film, and the preparing the electrode on the dielectric layer includes:
and sequentially preparing a second light-emitting layer and a second transparent conductive film on the dielectric layer by utilizing a screen printing or coating process.
The beneficial effect who adopts above-mentioned improvement scheme is: the signboard with double-sided display can be prepared, and the indicating effect is improved.
Further, the transparent reflective film still includes the little prism reflective film of second transparent, it still includes to attach transparent reflective film on electroluminescent film:
and attaching the second transparent microprism reflective film to the second transparent conductive film.
The beneficial effect who adopts above-mentioned improvement scheme is: the microprism reflective film technology is effectively combined with the electroluminescent film, so that both sides of the signboard can display self-luminescence, and the identification contents on both sides can be remotely and clearly seen through the microprism reflective film.
Further, the transparent substrate is made of a PC board or an acrylic board.
The beneficial effect who adopts above-mentioned improvement scheme is: the transparent substrate can play a good supporting effect while ensuring the display effect of the identification content.
Further, still include: and arranging a transparent protective layer on the electroluminescent film.
The beneficial effect who adopts above-mentioned improvement scheme is: the service life of the signboard can be effectively prolonged.
Further, still include:
making identification content by using a back electrode process;
or at least one of the transparent reflective film, the transparent protective layer and the transparent conductive film is selected for printing identification content, wherein the transparent conductive film comprises a first transparent conductive film and/or a second transparent conductive film.
The beneficial effect who adopts above-mentioned improvement scheme is: the self-luminous marking film can realize self-luminous background film by selecting marking content to print or can realize the luminous marking content only by manufacturing a back electrode pattern, and the application is wide.
In a second aspect, the invention provides an electroluminescent signboard prepared by the above method.
Drawings
FIG. 1 is a schematic structural diagram of a prepared electroluminescent signboard provided by an embodiment of the present invention;
fig. 2 is a schematic structural view of a prepared electroluminescent signboard according to another embodiment of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1. the transparent light-emitting device comprises a transparent protective layer 21, a first transparent micro-prism reflective film 22, a second transparent micro-prism reflective film 31, a first transparent conductive film 32, a second transparent conductive film 41, a first light-emitting layer 42, a second light-emitting layer 5, a dielectric layer 61, a back electrode 7, a substrate 8 and a transparent substrate.
Detailed Description
The following examples are further illustrative and supplementary to the present invention and do not limit the present invention in any way.
The invention provides a preparation method of an electroluminescent signboard, which comprises the following steps:
and attaching a transparent reflective film on the prepared electroluminescent film, and fixing the electroluminescent film on a substrate to obtain the electroluminescent signboard.
It will be appreciated that the transparent reflective film may be formed using glass bead technology, microprism technology, synthetic resin technology, thin film technology and coating technology and microreplication technology.
Considering that most of the existing signboard is manufactured by attaching a reflective film after printing patterns, does not emit light at night, can only display by an external light source, cannot display without the external light source, cannot play the effect of indication, and has potential safety hazards, the film made of the electroluminescent material is widely applied to the fields of advertisements and artworks, but because the film has the defect of low luminous brightness, if the electroluminescent material is used in the field of the signboard, the function of remote clear display is difficult to realize.
Optionally, in an embodiment, the preparing process of the electroluminescent thin film includes:
and sequentially preparing a first light-emitting layer and a dielectric layer on the first transparent conductive film by utilizing a screen printing or coating process, and preparing an electrode on the dielectric layer to obtain the electroluminescent film.
Electroluminescence (EL) is a physical phenomenon in which electrons excited by an electric field collide with a light emitting center to cause transition, change, and recombination of the electrons between energy levels to emit light, and generally includes a back electrode layer, an insulating layer, a light emitting layer, and a transparent electrode layer, and converts electric energy into light energy by using a characteristic that a light emitting material generates light under the action of the electric field.
Specifically, in this embodiment, when preparing the electroluminescent thin film, a first light-emitting layer may be prepared on the conductive layer of the first transparent conductive film by a coating or screen printing process, a dielectric layer may be prepared on the first light-emitting layer by a coating or screen printing process, and an electrode may be prepared on the dielectric layer to form a positive electrode and a negative electrode to generate an electric field, where the light-emitting layer includes an electroluminescent material, and the electroluminescent material is a material for directly converting electric energy into light energy by excitation of current and the electric field under the action of a direct current or alternating current electric field, for example, the light-emitting layer may be formed by blending a nanocrystal semiconductor material and an Ag complex luminescent material, and a higher photoluminescence quantum efficiency may be obtained by using the Ag complex luminescent material; the dielectric layer is made of an insulating material and functions similarly to the hole transport layer, and the first transparent conductive film may be made of transparent ITO (indium tin oxide which is indium oxide doped with tin).
Under the condition of no external light source, such as at night, the electroluminescent film can be electrified to emit light, so that the identification content is clearly displayed, and meanwhile, the background film is self-luminous, so that the light scattering is small, the contrast of the identification content is high, and a better identification effect can be achieved.
Preferably, the preparing the electrode on the dielectric layer includes:
and preparing a back electrode on the dielectric layer by utilizing a screen printing or vacuum coating process.
It is understood that the screen printing process is a printing process using the basic principle that the mesh of the image-text part of the screen plate is permeable to ink and the mesh of the non-image-text part is impermeable to ink, while the coating process refers to a process of spraying a liquid on a substrate, and the vacuum coating process refers to a method of forming a thin film by heating a metal or non-metal material under a high vacuum condition to evaporate and condense it on the surface of a plated part (metal, semiconductor or insulator).
Specifically, in this embodiment, the electrodes may be prepared into various shapes on the dielectric layer by using a screen printing or vacuum coating process according to actual application conditions, and the electrodes are fixed on the substrate, so that the first transparent conductive film and the electrodes respectively form a front electrode with light transmittance and a back electrode without light transmittance, for example, a transparent electrode film may be prepared on the substrate by printing, and the first transparent conductive film is obtained after drying; mixing an electroluminescent powder material with colloid by a screen printing method, uniformly printing on the first transparent conductive film, and drying to obtain a first light-emitting layer; uniformly printing a medium material on the first light-emitting layer by a screen printing method, and drying to obtain a medium layer; according to a pre-drawn electrode pattern, the electrode slurry is uniformly printed on the dielectric layer by a screen printing method, and a patterned back electrode can be formed after drying, wherein the back electrode material can comprise one of a polymer conductor, carbon slurry, silver paste, a metal conductive coating and a metal material.
Preferably, the transparent reflective film comprises a first transparent microprismatic reflective film, and attaching the transparent reflective film to the electroluminescent film comprises:
and attaching the first transparent microprism reflective film to the first transparent conductive film.
Specifically, as shown in fig. 1, in this embodiment, a first light emitting layer 41, a dielectric layer 5, and a back electrode 61 are sequentially prepared on a first transparent conductive film 31, so as to obtain the electroluminescent film, the prepared electroluminescent film is attached to a substrate 7, the substrate 7 may be a plastic plate such as an aluminum alloy plate, a stainless steel plate, or an acrylic plate, a first transparent microprism reflective film 21 is attached above the first transparent conductive film 31, and finally, a transparent protective layer 1 is hermetically disposed on the first transparent microprism reflective film 21, so as to obtain an electroluminescent signboard, wherein the microprism reflective film is a reflective material prepared based on the refraction and total reflection principles of a cube pyramid, in this embodiment, the surface smoothness of each cube pyramid exceeds 5nm (nanometers), and the angle error is less than 0.01 arc second, the transparent microprism reflective membrane is characterized in that 10000 microprisms are distributed in each square centimeter, is a reflective product completely realized by ultra-precision processing technology and technology, has better reflective effect compared with a glass bead type reflective membrane, and has longer visible distance and better recognition effect.
The microprism reflecting film is attached to the surface of the electroluminescent film to increase the reflecting effect, so that the problem of low brightness of electroluminescent cold light can be effectively solved, and the identification content can be displayed clearly in a long distance by utilizing the reflection and self-luminescence.
Further, in one embodiment, the substrate is a transparent substrate, the electrode is a second transparent conductive film, and the preparing the electrode on the dielectric layer includes:
and sequentially preparing a second light-emitting layer and a second transparent conductive film on the dielectric layer by utilizing a screen printing or coating process.
Preferably, the transparent reflective film further includes a second transparent microprism reflective film, and attaching the transparent reflective film to the electroluminescent film further includes:
and attaching the second transparent microprism reflective film to the second transparent conductive film.
The microprism reflective film technology is effectively combined with the electroluminescent film, so that both sides of the signboard can display self-luminescence, and the identification contents on both sides can be remotely and clearly seen through the microprism reflective film.
Preferably, the transparent substrate is made of a PC board or an acrylic board.
It can be understood that the transparent substrate can be made of other structures or materials under the condition that the display effect of the identification content is ensured and the good supporting effect is also ensured.
Preferably, the method further comprises the following steps: and arranging a transparent protective layer on the electroluminescent film.
Specifically, in this embodiment, as shown in fig. 2, a first light emitting layer 41, a dielectric layer 5, a second light emitting layer 42, and a second transparent conductive film 32 are sequentially prepared on the first transparent conductive film 31, so as to prepare an electroluminescent film, the first transparent conductive film 31 and the second transparent conductive film 32 in the electroluminescent film are correspondingly attached with a first transparent micro-prism reflective film 21 and a second transparent micro-prism reflective film 22, the prepared electroluminescent film is fixed on a transparent substrate 8 by glue, tape, screws, or other fixing methods, and a transparent protective layer 1 is hermetically disposed on the first transparent micro-prism reflective film 21, so as to prepare the electroluminescent signboard with a double-sided display function.
It can be understood that the transparent protective layer can be a PC board or an acrylic board, and is firmly fixed with the base material through glue, adhesive tape or screws and the like, and is sealed, so that the signboard can be effectively prevented from being corroded and damaged by rain water and the like, and the service life of the signboard is prolonged.
Preferably, the method further comprises the following steps:
making identification content by using a back electrode process;
or at least one of the transparent reflective film, the transparent protective layer and the transparent conductive film is selected for printing identification content, wherein the transparent conductive film comprises a first transparent conductive film and/or a second transparent conductive film.
Specifically, in this embodiment, the content of the logo may be a pattern such as a character, a figure, etc., and the content displayed by the logo may be printed on the reflective film of the transparent micro prism, the transparent conductive film, or the transparent protective layer, for example, in one embodiment, two light emitting layers are provided, and different patterns are printed on the corresponding surfaces of the two light emitting layers, so that the two surfaces of the signboard may display different content of the logo; the mark display content can be manufactured into only the mark content to emit light through a back electrode process, other areas do not emit light, for example, the shape of the back electrode can be manufactured to be consistent with the mark content, and a back electrode pattern is a mark pattern, so that the mark content can be selected to be printed according to actual needs to realize self-luminescence of a background film, or the back electrode pattern is manufactured to realize only the mark content to emit light, and the application is wide.
The embodiment of the invention also provides the electroluminescent signboard which is prepared by the preparation method of the electroluminescent signboard.
Most of the existing signboard is manufactured by attaching a reflective film after printing patterns, does not emit light at night, can only display by an external light source, cannot display without the external light source, cannot play an indicating effect, and has potential safety hazards; the LED backlight source is partially used for manufacturing the indicating plate, the light scattering is serious, and the display effect is fuzzy when the distance is long; the electroluminescent display has the defect of low brightness, so that the function of remote clear display is difficult to realize; the electroluminescent signboard and the preparation method thereof provided by the embodiment effectively combine the electroluminescent self-luminous characteristic and the characteristic of the microprism reflective film, can display self-luminous, reduce scattering, and be visible in a long distance, thereby avoiding the defects of the existing scheme, and realizing the high-definition indication function at night.
It will be appreciated by those skilled in the art that the above detailed description of the preferred embodiments of the present invention, however, is not intended to limit the present invention to the details of the embodiments, and that within the scope of the present invention, many simple modifications may be made to the technical solution of the present invention, and these simple modifications are within the scope of the present invention.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A preparation method of an electroluminescent signboard is characterized by comprising the following steps:
and attaching a transparent reflective film on the prepared electroluminescent film, and fixing the electroluminescent film on a substrate to obtain the electroluminescent signboard.
2. The method for preparing electroluminescent signboard of claim 1, wherein the electroluminescent film is prepared by the following steps:
and sequentially preparing a first light-emitting layer and a dielectric layer on the first transparent conductive film by utilizing a screen printing or coating process, and preparing an electrode on the dielectric layer to obtain the electroluminescent film.
3. The method of claim 2, wherein the step of forming the electrode on the dielectric layer comprises:
and preparing a back electrode on the dielectric layer by utilizing a screen printing or vacuum coating process.
4. The method of claim 2, wherein the transparent reflective film comprises a first transparent microprismatic reflective film, and attaching the transparent reflective film to the electroluminescent film comprises:
and attaching the first transparent microprism reflective film to the first transparent conductive film.
5. The method for preparing an electroluminescent signboard of claim 4 wherein the substrate is a transparent substrate, the electrode is a second transparent conductive film, and the preparing an electrode on the dielectric layer comprises:
and sequentially preparing a second light-emitting layer and a second transparent conductive film on the dielectric layer by utilizing a screen printing or coating process.
6. The method of claim 5, wherein the transparent reflective film further comprises a second transparent microprism reflective film, and attaching the transparent reflective film to the electroluminescent film further comprises:
and attaching the second transparent microprism reflective film to the second transparent conductive film.
7. The method for preparing an electroluminescent signboard of claim 5 wherein the transparent substrate is made of a PC board or an acryl board.
8. The method for producing an electroluminescent signboard of any one of claims 1 to 7, further comprising: and arranging a transparent protective layer on the electroluminescent film.
9. The method of making an electroluminescent sign according to claim 8, further comprising:
making identification content by using a back electrode process;
or at least one of the transparent reflective film, the transparent protective layer and the transparent conductive film is selected for printing identification content, wherein the transparent conductive film comprises a first transparent conductive film and/or a second transparent conductive film.
10. An electroluminescent signboard produced by the method for producing an electroluminescent signboard according to any one of claims 1 to 9.
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| CN202111497829.3A CN114255679A (en) | 2021-12-09 | 2021-12-09 | Electroluminescent signboard and preparation method thereof |
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| CN202111497829.3A CN114255679A (en) | 2021-12-09 | 2021-12-09 | Electroluminescent signboard and preparation method thereof |
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