CN202145687U

CN202145687U - Inorganic electroluminescent element

Info

Publication number: CN202145687U
Application number: CN201120240886U
Authority: CN
Inventors: 朴泰俊; 李龙根
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-07-11
Filing date: 2011-07-11
Publication date: 2012-02-15
Anticipated expiration: 2021-07-11

Abstract

Disclosed is an inorganic electroluminescent element having highlight brightness, comprising a polyester transparent film with soft characteristic, wherein the backside of the polyester transparency film is painted with a front side electrode layer formed by ITO having excellent transmittance and conductivity; a fluorescent layer is formed at the back side of the front side electrode layer; the backside of the fluorescent layer is painted with a dielectric layer formed by high-molecular resin having excellent conductivity and penetrability; a back side electrode layer, made of metal material having excellent reflective property, is formed at the back side of the dielectric layer to reflect the light which is emitted by the fluorescent layer and passes through the dielectric layer; and a protective layer is formed at the back side of the back side electrode layer to prevent moisture and ultraviolet ray. The dielectric layer adopts polyester high-molecular resin material while the back side electrode layer is made of aluminium. An oxidation protective layer is arranged between the back side electrode layer and the protective layer to prevent the oxidation of the back side electrode layer.

Description

Inorganic el element

Technical field

The utility model relates to a kind of electroluminescent cell, especially relates to a kind of inorganic el element.

Background technology

Electroluminescence (Electroluminescence) is called for short EL, is that the Destriau by France in 1936 finds, afterwards in specific area extensive uses such as illumination and backlights, but because its brightness and the problem in life-span, application is extremely limited.

1974, the Sharp company of Japan announced the zinc sulphide of the double insulation layer structure of its exploitation: manganese (ZnS:Mn) film electroluminescence element, and it is proposed applicable to player.Electroluminescent cell is compared with similar elements such as LCD LCD, and it is fast to have an answer speed, and self luminosity is good, and simple structure is manufactured advantages such as easy, is expected to become dull and stereotyped player of new generation.

Electroluminescent cell can be divided into according to the material difference that is used for luminescent layer: inorganic el element and organic electroluminescent device.Fig. 1 shows the characteristics of luminescence sketch map of existing inorganic el element.In the prior art; Inorganic el element is to be the nesa coating that polyester transparent film 1 back side of 50～150um forms hundreds of～thousands of dust thickness at thickness; Form fluorescence coating 2 at the back at nesa coating; Form inorganic dielectric layers 3 at fluorescence coating 2 back sides, form backplate layer 4 at inorganic dielectric layers 3 back sides, the electrode layer back side forms stable humidity and UV protection layer overleaf.

The dielectric layer 3 of ubi supra is by the BaTiO with high conductive characteristic ₃, SrTiO ₃Powder and organic vehicles etc. strong conductivity form by suitable ratio allotment, and print at the fluorescence coating back side the intact back of mill base manufacturing, dry formation under about 110～140 ℃, and the dielectric layer that forms under these conditions is extremely small to the reflection of light characteristic.Therefore; For above-mentioned inorganic el element; The light that fluorescence coating produces transmits to both direction, and the light that transmits to back side electrode layer is absorbed by dielectric layer and backplate layer, and the result has only the light that transmits to transparent membrane luminous; That is to say that above-mentioned inorganic el element has the defective of low-light level.

Summary of the invention

The above-mentioned technical problem that the utility model will solve provides the good high brightness organic electroluminescent cell of a kind of brightness.

In order to solve the problems of the technologies described above, the technical scheme of the utility model is:

A kind of inorganic el element comprises the polyester transparent film of flexible nature; The front electrode layer that is made up of light transmission and the good ITO of conductivity is smeared at the back side of polyester transparent film; The back side at the front electrode layer forms fluorescence coating; Smear the dielectric layer that constitutes by conductivity and the good macromolecule resin of penetrability at the back side of fluorescence coating; Form the backplate layer that is made up of reflecting properties good metal material at the back side of dielectric layer, reflection is sent by fluorescence coating and the light through dielectric layer; And the back side of backplate layer forms blocks moisture and ultraviolet protective layer.

Said dielectric layer adopts the polyester macromolecule resin material.

Said backplate layer adopts aluminium to process.

The oxide protective layer that prevents the oxidation of backplate layer is set between said backplate layer and the protective layer.

Said oxide protective layer is the metal film of being processed by platinum, gold, silver or carbon materials.

The thickness of said polyester transparent film is 50～150um, and electric treatment is prevented at its back side.

Said dielectric layer thickness is 30～70um.

The utility model sends light transmission front electrode layer through the light that the backplate layer reflected fluorescent light course backplate layer that is made up of reflecting properties good metal material sends.Therefore, under same drive condition, compare, the utlity model has high brightness characteristic, applicable to various product that requires high brightness characteristic with existing inorganic el element.

Description of drawings

Below in conjunction with accompanying drawing the embodiment of the utility model is done further detailed explanation:

Fig. 1 shows the characteristics of luminescence sketch map of existing inorganic el element.

Fig. 2 shows the structural representation of a kind of embodiment of the utility model.

Fig. 3 shows the structural representation of the another kind of embodiment of the utility model.

Fig. 4 shows the characteristics of luminescence sketch map of the utility model.

Among the figure: 1 transparent membrane, 2 fluorescence coatings, 3 dielectric layers, 4 backplate layers, 11 transparent membranes, 12 front electrode layers, 13 fluorescence coatings, 14 dielectric layers, 15 back sides electricity level layer, 16 protective layers, 21 oxide protective layers.

Embodiment

As shown in Figure 2, inorganic el element comprises: polyester transparent film 11 is a kind of of the good macromolecule membrane of flexibility, penetrability and thermal endurance; Front electrode layer 12 forms in the back side of polyester transparent film 11 by having the good tin indium oxide of conductivity and light transmission (ITO) applying material; Fluorescence coating 13 is formed at the back side of front electrode layer 12; Dielectric layer 14, the back side that is applied in fluorescence coating 13 by conductivity and the good macromolecule resin of penetrability forms; Backplate layer 15 forms at the back side of dielectric layer 14, is made up of reflecting properties good metal material, and the light of dielectric layer 14 is sent and passed through in reflection by fluorescence coating 13; Protective layer 16, the back side of electrode layer 15 forms overleaf, blocks moisture and ultraviolet ray; Front electrode layer 12 and backplate layer 15 make the light-emitting phosphor of specific pixel through external voltage.

In particular, the thickness of above-mentioned polyester transparent film 11 is 50～150um, suitably extrudes according to purposes, and one side is prevented electric treatment therein.In addition, in the heat treatment process,, need under about 150 ℃ of conditions, to carry out the heat treatment about 30 minutes during fabrication in order to reduce the influence of thermal contraction.

At above-mentioned front electrode layer 12, consider light transmittance, it is that tin indium oxide, thickness are that the nesa coating of hundreds of～thousands of dusts forms by material.The sheet resistance expectation setting value of tin indium oxide is every square of tens of～hundreds of ohms.

Above-mentioned dielectric layer 14 is to utilize plasticizer to make alite paste after the macromolecule resin with the resin system of polyester changes into solvent, with the thickness printing of about 30～70um, under 100～140 ℃, forms in dry 30 minutes.The expectation setting value of the penetration of dielectric layer 14 is 70～80%.

Above-mentioned backplate layer 15 is that 90～99% good aluminum constitutes by the light reflectance.Consider that the aluminium that constitutes above-mentioned backplate layer 15 has oxidation characteristic, as shown in Figure 3, can add the oxide protective layer 21 that constitutes by metal films such as platinum, gold, silver or carbon elements between backplate layer 15 and the protective layer 16.

As shown in Figure 4, be benchmark with fluorescence coating 13, by the light that fluorescence coating 13 sends, 50% passes toward the front electrode direction, and 50% remaining biography is toward the backplate direction.At this moment, pass the dielectric layer 14 that has the 70-80% through characteristic to the light transmission of back side electrode direction, arrive backplate layer 15.Backplate layer 15 is made up of the aluminum metal with reflection characteristic of 90～99%, to dielectric layer 14 reflection rays.See through the light of dielectric layer 14 reflections, see through fluorescence coating 13, front electrode layer 12 and transparent membrane 11 and be transmitted into the outside.Visible with this; Through the light that transmits to backplate in the light that sends on the reflected fluorescent light layer 13, see through front electrode layer 12 and be transmitted into the outside, under same drive condition; Can provide with existing inorganic el element and compare, have the inorganic el element of high brightness characteristic.Therefore, applicable to because of the limited various product that needs high brightness of its low-light level characteristic of inorganic el element.

In practical application like the outdoor advertising board, require the brightness of 50-90 candela on the billboard material surface, existing inorganic el element is stably providing some difficulty aspect the above-mentioned light characteristic.Yet, the utlity model has the characteristic of high brightness, can satisfy the requirement of outdoor advertising board, therefore applicable to the outdoor advertising board.In addition, existing outdoor billboard generally is made up of iron and steel framework, a large amount of fluorescent lamp and electric wire distribution etc., and overall weight is heavy.But, adopt the utility model not only can reduce the weight of billboard, construction is convenient, amount also capable of reducing power consumption.

Claims

1. an inorganic el element is characterized in that: the polyester transparent film that comprises flexible nature; The front electrode layer that is made up of light transmission and the good ITO of conductivity is smeared at the back side of polyester transparent film; The back side at the front electrode layer forms fluorescence coating; Smear the dielectric layer that constitutes by conductivity and the good macromolecule resin of penetrability at the back side of fluorescence coating; Form the backplate layer that is made up of reflecting properties good metal material at the back side of dielectric layer, reflection is sent by fluorescence coating and the light through dielectric layer; And the back side of backplate layer forms blocks moisture and ultraviolet protective layer.

2. inorganic el element according to claim 1 is characterized in that: said dielectric layer adopts the polyester macromolecule resin material.

3. inorganic el element according to claim 1 is characterized in that: said backplate layer adopts aluminium to process.

4. according to claim 1,2 or 3 described inorganic el elements, it is characterized in that: the oxide protective layer that prevents the oxidation of backplate layer is set between said backplate layer and the protective layer.

5. inorganic el element according to claim 4 is characterized in that: said oxide protective layer is the metal film of being processed by platinum, gold, silver or carbon materials.

6. according to claim 1,2 or 3 described inorganic el elements, it is characterized in that: the thickness of said polyester transparent film is 50～150um, and electric treatment is prevented at its back side.

7. inorganic el element according to claim 4 is characterized in that: the thickness of said polyester transparent film is 50～150um, and electric treatment is prevented at its back side.

8. according to claim 1,2 or 3 described inorganic el elements, it is characterized in that: said dielectric layer thickness is 30～70um.

9. inorganic el element according to claim 4 is characterized in that: said dielectric layer thickness is 30～70um.