CN219536758U

CN219536758U - Flexible electroluminescent device

Info

Publication number: CN219536758U
Application number: CN202320533271.8U
Authority: CN
Inventors: 夏金杭; 翟凯旋; 李楠; 高飞扬; 徐军飞
Original assignee: Quzhou University
Current assignee: Quzhou University
Priority date: 2023-03-20
Filing date: 2023-03-20
Publication date: 2023-08-15
Anticipated expiration: 2033-03-20

Abstract

The utility model discloses a flexible electroluminescent device, which comprises a flexible substrate and a flexible substrate modification layer, and is characterized in that the flexible substrate modification layer is distributed on the upper surface of the flexible substrate, the organic silicon compound film layer is wrapped on the upper surface of the flexible substrate modification layer, the first packaging layer is wrapped on the outer surface of the organic silicon compound film layer, a buffer layer is arranged on the outer surface of the first packaging layer, and a second packaging layer is arranged on the outer surface of the buffer layer. Compared with the conventional common flexible matrix inorganic electroluminescent flat panel display, the flexible electroluminescent device has the advantages that the organic silicon compound film layer is a polydimethylsiloxane film, the thickness of the polydimethylsiloxane film is-micron, and the polydimethylsiloxane film has good biocompatibility, excellent elasticity and rebound resilience of an organic silicon material, outstanding temperature resistance and higher gas and water vapor permeability and selectivity.

Description

Flexible electroluminescent device

Technical Field

The utility model relates to the technical field of flexible electroluminescent screens, in particular to a flexible electroluminescent device.

Background

Flexible electroluminescent devices have been widely used as terminal equipment for information technology, for mobile phones, televisions, computers, etc. The novel flat panel display technology in the present stage is continuously pursuing technical indexes such as large, light, thin, electricity saving and the like. Currently, flat panel displays mainly comprise glass substrates, such as Field Emission Displays (FEDs), liquid Crystal Displays (LCDs), organic electroluminescent displays (OELs or OLEDs), and Plasma Displays (PDPs). Its advantages are easy breaking, limited area, heavy weight, heat and bending, long production period and high cost. The existing electroluminescent display is also based on glass, such as inorganic thick film electroluminescent display, inorganic thin film electroluminescent display, and organic electroluminescent display.

A flexible matrix inorganic electroluminescent flat panel display is disclosed in patent application No. 201010101273.7. The utility model can print or print fluorescent color coating composed of red, blue and green outside the transparent flexible plastic base layer, each color corresponds to the independent luminous pixel element, and forms the flexible matrix color image display. When the color display is prepared, the electroluminescent material should be blue-green or blue, the emission spectrum is 430-490m, and the fluorescent color coating material can absorb at 430-490nm to form color luminescence. When the method is used for preparing the color luminous display, pixel elements are as small as possible, the generated color luminous effect is good, but the moisture resistance and the temperature resistance of the flexible matrix inorganic electroluminescent flat panel display are insufficient, and the service life is reduced.

Accordingly, in view of the above, an improvement of the conventional structure has been studied and proposed, and a flexible electroluminescent device is provided.

Disclosure of Invention

The present utility model is directed to a flexible electroluminescent device, which solves the above-mentioned problems of the prior art.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the flexible electroluminescent device comprises a flexible substrate and a flexible substrate modification layer, and is characterized in that the flexible substrate modification layer is distributed on the upper surface of the flexible substrate, an organosilicon compound film layer is wrapped on the upper surface of the flexible substrate modification layer, a first packaging layer is wrapped on the outer surface of the organosilicon compound film layer, a buffer layer is arranged on the outer surface of the first packaging layer, and a second packaging layer is arranged on the outer surface of the buffer layer.

Further, the flexible substrate modification layer and the first packaging layer are inorganic high-carbon films and polymers to form a composite layer together.

Further, the organic silicon compound film layer is made of a polydimethylsiloxane elastomer polymer film body material, the inorganic high-carbon film is a high-thermal-conductivity carbon film, and the high-thermal-conductivity carbon film is a diamond-like carbon film.

Furthermore, the upper surface and the lower surface of the buffer layer are regularly distributed with a plurality of rectangular grooves.

Furthermore, the upper surface of the flexible substrate modification layer is uniformly distributed with a Rong-light color coating, the Rong-light color coating is composed of red, green and blue, and each color corresponds to an independently-luminous pixel element.

Further, a flexible transparent base layer is distributed on the upper surface of the Rong-light color coating, a transparent conductive layer is arranged on the upper surface of the flexible transparent base layer, and the transparent conductive layer is formed by screen printing and laser etching of transparent polymer conductive materials.

Further, the upper surface of the transparent conductive layer is regularly distributed with a luminescent layer, the luminescent layer is formed by uniformly mixing an alternating current electroluminescent powder material with colloid through a screen printing method, uniformly printing the mixture on the transparent conductive layer and drying the mixture, wherein a dielectric layer is arranged on the upper surface of the luminescent layer, and the dielectric layer is formed by uniformly mixing and printing the mixture of barium titanate and lead titanate with the colloid through the screen printing method and drying the mixture on the luminescent layer.

Further, a back electrode layer is arranged on the upper surface of the dielectric layer, and the back electrode layer is composed of molybdenum.

Compared with the prior art, the utility model has the beneficial effects that:

1. according to the utility model, through the arrangement of the organosilicon compound film layer, the organosilicon compound film layer is a polydimethylsiloxane film, the thickness of the polydimethylsiloxane film is 10-200 microns, and the polydimethylsiloxane film has good biocompatibility, excellent elasticity and rebound resilience of organosilicon materials, outstanding temperature resistance and higher gas and water vapor permeability and selectivity;

2. according to the utility model, through the arrangement of the first packaging layer, the buffer layer and the second packaging layer, and the buffer layer is arranged between the first packaging layer and the second packaging layer, rectangular grooves are regularly distributed on the upper surface and the lower surface of the buffer layer, so that the bonding strength between the packaging layers is improved, the packaging failure of the flexible screen in the bending process is avoided, and the service life of the flexible screen is prolonged.

Drawings

FIG. 1 is a schematic diagram of the whole structure of a flexible electroluminescent device;

FIG. 2 is a schematic view of the electroluminescent device of FIG. 1 according to the present utility model;

FIG. 3 is a schematic diagram of the buffer layer structure of FIG. 2 according to the present utility model.

In the figure: 1. a flexible substrate; 2. a flexible substrate modification layer; 3. a glossing color coating; 4. a flexible transparent base layer; 5. a transparent conductive layer; 6. a light emitting layer; 7. a dielectric layer; 8. a back electrode layer; 9. an organosilicon compound thin film layer; 10. a first encapsulation layer; 11. a buffer layer; 12. a second encapsulation layer; 13. rectangular grooves; 14. red; 15. green; 16. blue.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1-3, a flexible electroluminescent device comprises a flexible substrate 1 and a flexible substrate modification layer 2, and is characterized in that the flexible substrate modification layer 2 is distributed on the upper surface of the flexible substrate 1, the upper surface of the flexible substrate modification layer 2 is wrapped with an organosilicon compound film layer 9, the outer surface of the organosilicon compound film layer 9 is wrapped with a first encapsulation layer 10, the outer surface of the first encapsulation layer 10 is provided with a buffer layer 11, and the outer surface of the buffer layer 11 is provided with a second encapsulation layer 12. The flexible substrate modification layer 2 and the first packaging layer 10 are inorganic high-carbon films and polymers to form a composite layer together. The organosilicon compound film layer 9 is a polydimethylsiloxane elastomer polymer film material, the inorganic high-carbon film is a high-thermal-conductivity carbon film, and the high-thermal-conductivity carbon film is a diamond-like carbon film. The upper and lower surfaces of the buffer layer 11 are regularly distributed with a plurality of rectangular grooves 13. The upper surface of the flexible substrate modification layer 2 is uniformly distributed with a Rong-light color coating 3, the Rong-light color coating 3 consists of red 14, green 15 and blue 16, and each color corresponds to an independently luminous pixel element. The upper surface of the Rong-guang color coating 3 is distributed with a flexible transparent base layer 4, the upper surface of the flexible transparent base layer 4 is provided with a transparent conductive layer 5, and the transparent conductive layer 5 is formed by screen printing and laser etching of transparent polymer. The upper surface of the transparent conductive layer 5 is regularly distributed with a luminescent layer 6, the luminescent layer 6 is formed by uniformly mixing an alternating current electroluminescent powder material with colloid through a screen printing method, uniformly printing on the transparent conductive layer 5 and drying, the upper surface of the luminescent layer 6 is provided with a dielectric layer 7, and the dielectric layer 7 is formed by uniformly mixing and printing a mixture of barium titanate and lead titanate with the colloid through the screen printing method on the luminescent layer 6 and drying. The upper surface of the dielectric layer 7 is provided with a back electrode layer 8.

The embodiments of the utility model have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the utility model in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, and to enable others of ordinary skill in the art to understand the utility model for various embodiments with various modifications as are suited to the particular use contemplated.

Claims

1. The utility model provides a flexible electroluminescent device, includes flexible substrate (1) and flexible substrate modification layer (2), its characterized in that flexible substrate modification layer (2) are distributed on the upper surface of flexible substrate (1), and the upper surface parcel of flexible substrate modification layer (2) has organosilicon compound thin film layer (9), the surface parcel of organosilicon compound thin film layer (9) has first encapsulation layer (10), and the surface of first encapsulation layer (10) is equipped with buffer layer (11), the outward appearance of buffer layer (11) is equipped with second encapsulation layer (12).

2. A flexible electroluminescent device as claimed in claim 1, characterized in that the flexible substrate modification layer (2) and the first encapsulation layer (10) are inorganic high carbon films and polymers together forming a composite layer.

3. A flexible electroluminescent device as claimed in claim 1, characterized in that the organosilicon compound thin film layer (9) is a polydimethylsiloxane elastomer polymer film body material, and the inorganic high-carbon thin film is a high-thermal conductivity carbon thin film, which is a diamond-like carbon thin film.

4. A flexible electroluminescent device as claimed in claim 1, characterized in that the upper and lower surfaces of the buffer layer (11) are regularly provided with a plurality of rectangular recesses (13).

5. A flexible electroluminescent device as claimed in claim 1, characterized in that the upper surface of the flexible substrate modification layer (2) is uniformly provided with a light-rich color coating (3), the light-rich color coating (3) is composed of red (14), green (15) and blue (16), and each color corresponds to an independently emitting pixel element.

6. A flexible electroluminescent device according to claim 5, characterized in that the upper surface of the Rongguang color coating (3) is provided with a flexible transparent base layer (4), the upper surface of the flexible transparent base layer (4) is provided with a transparent conductive layer (5), and the transparent conductive layer (5) is formed by screen printing and laser etching of transparent polymeric conductive material.

7. The flexible electroluminescent device according to claim 6, wherein the transparent conductive layer (5) has a light emitting layer (6) regularly distributed on its upper surface, the light emitting layer (6) is formed by uniformly mixing an ac electroluminescent powder material with a colloid by a screen printing method, and uniformly printing the mixture on the transparent conductive layer (5), the upper surface of the light emitting layer (6) is provided with a dielectric layer (7), and the dielectric layer (7) is formed by uniformly mixing a mixture of barium titanate and lead titanate with the colloid by a screen printing method, and then uniformly printing the mixture on the light emitting layer (6), and drying the mixture.

8. A flexible electroluminescent device as claimed in claim 7, characterized in that the upper surface of the dielectric layer (7) is provided with a back electrode layer (8).