KR100628150B1 - Organic Electro-Luminescence Device - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to general lighting or LCD backlight units (BLUs) manufactured using organic electroluminescence (OLED). In particular, the present invention by combining at least a plurality of bi-directional OLED and top emitting OLED using an adhesive or encapsulant to produce a BLU for general lighting or LCD, it is possible to easily increase the brightness and illumination, and at the same time device life It does not affect the effect. It also has the effect of matching the color of light required by general lighting and BLU, or easily increasing the color purity.

Bidirectional OLED, top emitting OLED, bonding

Description

Organic EL-Lumin Device

1 is a cross-sectional view of a general top-emitting OLED

2A through 2C are cross-sectional views illustrating an OLED manufacturing process according to the first embodiment of the present invention.

3A to 3C are cross-sectional views illustrating an OLED fabrication process according to a second embodiment of the present invention.

4A and 4B are cross-sectional views illustrating an OLED fabrication process according to a third embodiment of the present invention.

5A and 5B are cross-sectional views illustrating an OLED manufacturing process according to a fourth embodiment of the present invention.

6A and 6B are cross-sectional views illustrating an OLED manufacturing process according to a fifth embodiment of the present invention.

7 is a cross-sectional view of an OLED according to a sixth embodiment of the present invention.

Explanation of symbols for main parts of the drawings

101,201 substrate 102,202 first electrode

103,203: organic EL layer 104,204: second electrode

105,205: protective layer 301: sealing cap

The present invention relates to an organic electroluminescence (OLED) device for general lighting or an LCD backlight unit (BLU).

In general, an organic EL device is a flat-panel display device using electroluminescence of organic materials, in which electrons and holes are injected from an electrode and recombine again through an excited state. Emits light. At this time, the light emitting mechanism is called OLED (Organic Light Emitting Diode) because it is close to LED.

Due to this principle, the OLED described above does not require a separate light source, unlike conventional thin film liquid crystal display devices, and thus has an advantage of reducing the volume and weight of the device. OLEDs also exhibit high quality panel characteristics (ie low power, high brightness, high reaction rate, low weight). Due to these characteristics, OLEDs are considered to be powerful next-generation displays that can be used in most consumer electronic applications such as mobile terminals, CHS, PDAs, Camcorders, and Palm PCs. In addition, since the manufacturing process is simple, there is an advantage that can reduce the production cost more than conventional LCD.

In addition, the OLED is classified into a top emission method and a bottom emission method according to the transparency of the pixel electrode and the common electrode.

In the bottom emission method, since a material used as a cathode serves as a mirror reflection surface, half of the light emitted from the emitting layer of the organic EL device is directed toward the transparent electrode, and the other half is applied to the cathode material. It is reflected and exits toward the transparent electrode.

The top emission method is a structure in which an organic EL element is formed on an opaque substrate and light is emitted in the opposite direction of the substrate by finally processing a transparent electrode.

1 is a cross-sectional view illustrating an example of a general top emitting OLED, in which an anode is formed of an opaque conductive material such as metal on a substrate. And a cathode electrode formed of a transparent conductive material is disposed to face the anode electrode, and an organic EL layer including red, green, and blue light emitting materials therebetween. Is formed. The organic EL layer includes a hole injection layer (HIL), a hole transport layer (HTL), an emission layer (EML), an electron transport layer (ETL), a layer in contact with an anode electrode, And an electron injection layer (EIL) are sequentially stacked.

The sealing plate is bonded to a predetermined area of the substrate using a sealing material.

A seal-cover is formed to cover the anode electrode, the cathode electrode, and the organic EL layer, and a sealant joins the substrate and the sealing plate. In addition, a getter for absorbing moisture and oxygen into the inside of the sealing plate by the adhesive tape may be attached as necessary.

In this structure, the cathode electrode injects electrons into the light emitting layer through the electron injection layer and the electron transport layer, and the anode electrode injects holes into the light emitting layer through the hole injection layer and the hole transport layer. Then, electrons and holes recombine in the emission layer to form excitons, and visible light of a specific wavelength is generated by energy from the formed excitons. In addition, visible light generated in the emission layer is emitted through the cathode because the cathode is formed of a transparent conductive material. At this time, the light emitted from the light emitting layer toward the anode is reflected by the anode electrode formed of an opaque conductive material.

As such, the OLED emits light only from one side (the upper part in FIG. 1) because one of the two electrodes is a metal.

That is, since FIG. 1 uses one OLED, luminance and illuminance are not good, and when the luminance is increased according to a use, device life is reduced. In addition, there is a problem that it is difficult to match the color and color purity of the light (normally the wavelength of the light coming out of the white-BLU should be all RGB).

The present invention is to solve the above problems, an object of the present invention is to provide an OLED device to increase the brightness and illuminance by combining at least two or more OLED devices to produce a general lighting or BLU.

According to a first preferred embodiment of the present invention, a first electrode of a transparent conductive material, an organic EL layer of an organic material, and a second electrode of a transparent conductive material are sequentially formed on an upper transparent substrate having a light emitting region defined therein. Stacked upper elements; And a lower element in which a first electrode of a light reflection material, an organic EL layer of an organic material, and a second electrode of a transparent conductive material are sequentially stacked on a lower substrate having a light emitting region defined therein, and the upper and lower elements are adhesive It is characterized by being bonded using.

A second preferred embodiment of the present invention is an upper element in which a first electrode of a transparent conductive material, an organic EL layer of an organic material, a second electrode of a transparent conductive material, and a protective layer are sequentially stacked on an upper transparent substrate having a light emitting region defined therein. ; And a lower element in which a first reflective electrode of a light reflective material, an organic EL layer of an organic material, a second electrode of a transparent conductive material, and a protective layer are sequentially stacked on a lower substrate having a light emitting region defined therein. The lower element is characterized by being bonded using an adhesive.

A third preferred embodiment of the present invention includes an upper element in which a first electrode of a transparent conductive material, an organic EL layer of an organic material, and a second electrode of a transparent conductive material are sequentially stacked on an upper transparent substrate having a light emitting region defined therein; And a lower element in which a first reflective electrode of a light reflecting material, an organic EL layer of an organic material, and a second electrode of a transparent conductive material are sequentially stacked on a lower substrate having a light emitting region defined therein. Only the peripheral portion of the light emitting area is bonded using an encapsulant.

According to a third preferred embodiment of the present invention, the protective layer is further laminated on the second electrodes of the upper and lower devices, respectively.

A fourth preferred embodiment of the present invention includes an upper element in which a first electrode of a transparent conductive material, an organic EL layer of an organic material, and a second electrode of a transparent conductive material are sequentially stacked on an upper transparent substrate having a light emitting region defined therein; A central element in which a first electrode of a transparent conductive material, an organic EL layer of an organic material, and a second electrode of a transparent conductive material are sequentially stacked on a central transparent substrate having a light emitting region defined therein; And a lower element in which a first reflective electrode of a light reflecting material, an organic EL layer of an organic material, and a second electrode of a transparent conductive material are sequentially stacked on a lower substrate having a light emitting region defined therein. The device is characterized in that it is bonded using an adhesive.

A fourth preferred embodiment of the present invention is characterized in that the protective layer is further laminated on the second electrodes of the upper, middle, and lower elements, respectively.

A fifth preferred embodiment of the present invention includes an upper element in which a first electrode of a transparent conductive material, an organic EL layer of an organic material, and a second electrode of a transparent conductive material are sequentially stacked on an upper transparent substrate having a light emitting region defined therein; A central element in which a first electrode of a transparent conductive material, an organic EL layer of an organic material, and a second electrode of a transparent conductive material are sequentially stacked on a central transparent substrate having a light emitting region defined therein; And a lower element in which a first reflective electrode of a light reflecting material, an organic EL layer of an organic material, and a second electrode of a transparent conductive material are sequentially stacked on a lower substrate having a light emitting region defined therein. Only the periphery of the light emitting area of the device is bonded by using the encapsulant, which is characterized by its characteristic.

A fifth preferred embodiment of the present invention is characterized in that the protective layer is further laminated on the second electrodes of the upper, middle, and lower elements, respectively.

A sixth preferred embodiment of the present invention includes an upper element in which a first electrode of a transparent conductive material, an organic EL layer of an organic material, and a second electrode of a transparent conductive material are sequentially stacked on an upper transparent substrate having a light emitting region defined therein; A central element in which a first electrode of a transparent conductive material, an organic EL layer of an organic material, and a second electrode of a transparent conductive material are sequentially stacked on a central transparent substrate having a light emitting region defined therein; And a lower element in which a first electrode of a transparent conductive material, an organic EL layer of an organic material, and a second electrode of an opaque conductive material are sequentially stacked on a lower substrate having a light emitting region defined therein. Only the peripheral portion of the light emitting area is bonded using an encapsulant.

A sixth preferred embodiment of the present invention is characterized in that the protective layer is further laminated on the second electrodes of the upper, middle, and lower elements, respectively.

Other objects, features and advantages of the present invention will become apparent from the following detailed description of embodiments taken in conjunction with the accompanying drawings.

Hereinafter, with reference to the accompanying drawings illustrating the configuration and operation of the embodiment of the present invention, the configuration and operation of the present invention shown in the drawings and described by it will be described as at least one embodiment, By the technical spirit of the present invention described above and its core configuration and operation is not limited.

First embodiment

2 shows an OLED manufacturing method according to a first embodiment of the present invention, showing a process of manufacturing a general lighting or BLU by attaching two OLED devices.

First, as in FIG. 2A, an upper element is made. In the case of the upper element, after forming the first electrode 102 on the transparent substrate 101, the organic EL layer 103 and the second electrode 104 are laminated in this order. Here, the upper element is an embodiment of manufacturing a bidirectional OLED. To this end, the first and second electrodes 102 and 104 should be transparent.

That is, the first electrode 102 can be used as long as it is a conductive material. To this end, the first electrode 102 uses any one of indium tin oxide (ITO), an organic conductive material, a metal and an alloy or a multi-layer of a metal, and a mixed material of the three materials. This may be used, but is not limited thereto. In particular, the first electrode 102 is preferably coated with a thin (1 to 1000 kPa) Cr on Al, AlNd or Ag (Al / Cr, AlNd / Cr, Ag / Cr, etc.).

As the second electrode 104, a conductive material having good light transmission may be used. Like the first electrode 102 described above, the second electrode 104 may be any one of ITO, an organic conductive material, an alloy and a multilayer of metal and metal, and a mixed material of the three materials, but is not limited thereto. Do not. In particular, the second electrode 104 may be coated with a thin layer of Al and Mg-Ag (1 to 1000 kPa) and then coated with ITO or an inorganic material thereon.

Then, a lower element is made as in FIG. 2B. In this case, the method and material for making the lower element are the same as the upper element described above, but instead, the first electrode 202 should use an electrode having good reflectance. As an example, the lower device may be manufactured by an upper emission method.

That is, the first electrode 202 is formed of a highly reflective material (for example, an opaque conductive material) on the transparent (or opaque) substrate 201, and red, green, and blue (red) are formed thereon. An organic EL layer 203 containing a light emitting material of blue color is formed. The second electrode 204 is formed of a conductive material having good light transmission on the organic EL layer 203.

Like the upper element of FIG. 2A, the second electrode 204 may use any one of ITO, an organic conductive material, an alloy and a multilayer of metal and metal, and a mixed material of the three materials, but is not limited thereto. . In particular, the second electrode 204 may be coated with a thin layer of Al and Mg-Ag (1 to 1000 kPa) and then coated with ITO or an inorganic material thereon.

2A and 2B, when the upper element and the lower element are made, the upper and lower elements are bonded in a vacuum or an atmosphere in which moisture and oxygen levels can be adjusted as shown in FIG. 2C.

At this time, as shown in Figure 2c, the upper and lower elements are bonded using the front adhesive (adhesive).

The adhesive uses a suitable material in consideration of light efficiency characteristics. That is, the material of the adhesive uses a suitable material for maximizing the sealing effect as well as the out coupling (out coupling) effect.

For example, the adhesive mainly uses UV curing, heat curing or a combination of the two. In the present invention, the use of a UV curing adhesive is an example.

For the first embodiment of the present invention configured as described above, a detailed operation will be described with reference to the OLED in which the upper and lower elements are bonded as shown in FIG. 2C.

That is, when a predetermined voltage is applied to the first electrode 102 and the second electrode 104 of the upper element as shown in FIG. 2A, holes are formed in the first electrode 102 and electrons are emitted in the second electrode 104. Inject into layer 103. Holes and electrons in the organic EL layer 103 recombine to emit light.

Also, when a predetermined voltage is applied to the first electrode 202 and the second electrode 204 of the lower element as shown in FIG. 2B, holes are formed in the first electrode 202 and electrons are formed in the second electrode 204. Inject into layer 203. Then, holes and electrons in the organic EL layer 203 are recombined to emit light.

At this time, the first electrode 102 and the second electrode 104 of the upper element and the second electrode 204 of the lower element are all made of a conductive material, and the first electrode 202 of the lower element has a high reflectance. Since it is made of a material, half of the light generated in the organic EL layer 103 of the upper element is emitted directly toward the first electrode 102. The other half of the light is incident on the first electrode 202 of the lower element through the second electrodes 104 and 204 of the upper and lower elements, but is reflected by the first electrode 202 and is again reflected by the first electrode 102 of the upper element. Will be released in the In addition, half of the light generated in the organic EL layer 203 of the lower element is directly emitted to the first electrode 102 of the upper element via the second and second electrodes 204 and 104 of the upper element, and the other half of the light is The light is reflected from the first electrode 202 of the lower element to be emitted toward the first electrode 102 of the upper element. Therefore, the observer can see the entire light through the substrate 101 of the upper element by the combination of the reflected light and the direct emission light.

As described above, in the present invention, the first and second electrodes 102 and 104 of the upper element and the second electrode 204 of the lower element are made of a transparent conductive material, and the first electrode 202 of the lower element is opaque with high reflectance. By forming the conductive material and then bonding the substrates of the two elements, it is possible to concentrate the light generated in the two organic EL layers in one direction. Therefore, the present invention does not affect the device life while easily raising the luminance and illuminance required for general lighting and BLU. In addition, color purity required for general lighting and BLU can be easily increased.

Second embodiment

FIG. 3 is a second embodiment of the present invention, except that a passivation layer is further formed on each of the upper and lower elements before the front sealing of the upper and lower elements. Same as

In other words, the first electrode 102, the organic EL layer 103, and the second electrode 104 are sequentially stacked on the transparent substrate 101 of the upper element by the same process as illustrated in FIG. 2A. The protective layer 105 is formed on the second electrode 104. In addition, the first electrode 202, the organic EL layer 203, and the second electrode 204 are sequentially stacked on the substrate 101 of the lower element by the same process as shown in FIG. 2B. The protective layer 205 is formed on the second electrode 204.

The protective layers 105 and 205 are formed of an organic material (particularly a polymer), an inorganic material (SiNx, SiO 2), or a multi layer thereof. That is, the protective layers 105 and 205 use a material which is UV cured after deposition or a material having passivation properties by simply deposition.

In addition, the upper and lower elements on which the protective layers 105 and 205 are formed are bonded using a front adhesive (adhesive) in a vacuum or an atmosphere capable of controlling moisture and oxygen amounts. The adhesive uses a suitable material in consideration of light efficiency characteristics. The adhesive mainly uses UV curing, heat curing or a combination of the two.

Third embodiment

FIG. 4 is a third embodiment of the present invention. As shown in FIG. 2 or FIG. 3, when upper and lower devices are made, only the peripheral portion of the light emitting area is bonded using a sealant. The light emitting region is a region through which light emitted from the organic EL layer is transmitted.

FIG. 4A illustrates an example in which only the peripheral portions of the light emitting regions of the upper and lower devices manufactured as shown in FIGS. 2A and 2B are bonded using a sealant.

FIG. 4B illustrates an example in which only peripheral portions of the light emitting regions of the upper and lower devices manufactured as shown in FIGS. 3A and 3B are bonded using a sealant.

The said sealing material should just be a thermosetting, UV curing, or mixed type.

In the first to third embodiments of the present invention, the organic EL layers 103 and 203 of the upper and lower elements may use different colors, or different colors. You can also adjust the final color by mixing the light.

Meanwhile, one or more bidirectional OLED elements may be attached to increase luminance and illuminance or to increase RGB color purity, which are illustrated in FIGS. 5 and 6.

Fourth embodiment

FIG. 5 shows an example in which three OLED devices are bonded using an adhesive as a fourth embodiment of the present invention. The adhesive uses a suitable material in consideration of light efficiency characteristics. That is, the material of the adhesive uses a suitable material for maximizing the sealing effect as well as the out coupling (out coupling) effect. For example, the adhesive mainly uses UV curing, heat curing or a combination of the two.

FIG. 5A is a cross-sectional view illustrating an example in which two bidirectional OLEDs and one top emission OLED device manufactured as shown in FIG. 2 are bonded together using an adhesive.

That is, a plurality of bidirectional OLEDs are manufactured in the same manner as in FIG. 2A, and these are called upper and middle devices, respectively. The bidirectional OLED of FIG. 2A includes a first electrode 102 made of a transparent conductive material, an organic EL layer 103 made of at least one organic material, and a second cathode 104 made of a transparent conductive material. It consists of.

In addition, a top emitting OLED device is manufactured in the same manner as in FIG. 2B, and this is called a bottom device. The upper emission type OLED of FIG. 2B includes a first electrode 202 made of a material having good reflectivity, an organic EL layer 203 made of one or more organic materials, and a second cathode made of a transparent conductive material. 204).

The upper, middle and lower elements are bonded together using an adhesive as shown in FIG. 5A.

FIG. 5B is a cross-sectional view illustrating an example in which two bidirectional OLEDs and one top emission OLED device manufactured as shown in FIG. 3 are bonded together using an adhesive.

That is, a plurality of bidirectional OLEDs are manufactured in the same manner as in FIG. 3A, and these are called upper and middle devices, respectively. The bidirectional OLED of FIG. 3A includes a first electrode 102 made of a transparent conductive material, an organic EL layer 103 made of at least one organic material, a second cathode 104 made of a transparent conductive material, and a transparent conductive material. And a protective layer 105.

In addition, a top emitting OLED device is manufactured in the same manner as in FIG. 3B, and this is called a bottom device. The upper emission type OLED of FIG. 3B includes a first electrode 202 made of a material having good reflectivity, an organic EL layer 203 made of at least one organic material, and a second cathode 204 made of a transparent conductive material. ) And a protective layer 205.

The upper, middle, and lower elements are bonded together using an adhesive as shown in FIG. 5B.

Fifth Embodiment

FIG. 6 shows an example in which only peripheral portions of the light emitting regions of three OLED devices are bonded using a sealant as a fifth embodiment of the present invention. The adhesive uses a suitable material in consideration of light efficiency characteristics. The said sealing material should just be thermosetting, UV hardening, or a mixed type.

FIG. 6A is a cross-sectional view illustrating an example in which only two peripheral light emitting regions of two bidirectional OLEDs and one top emitting OLED fabricated as shown in FIG. 2 are bonded using an encapsulant.

That is, a plurality of bidirectional OLEDs are manufactured in the same manner as in FIG. 2A, and these are called upper and middle devices, respectively. The bidirectional OLED of FIG. 2A includes a first electrode 102 made of a transparent conductive material, an organic EL layer 103 made of at least one organic material, and a second cathode 104 made of a transparent conductive material. It consists of.

In addition, a top emitting OLED device is manufactured in the same manner as in FIG. 2B, and this is called a bottom device. The upper emission type OLED of FIG. 2B includes a first electrode 202 made of a material having high reflectivity on the substrate 201, an organic EL layer 203 made of at least one organic material, and a second cathode made of a transparent conductive material. 204.

And only the peripheral portion of the light emitting region of the upper, middle and lower elements are bonded using an encapsulant as shown in FIG. 6A.

FIG. 6B is a cross-sectional view illustrating an example in which only two peripheral light emitting regions of two bidirectional OLEDs and one top emitting OLED fabricated as shown in FIG. 3 are bonded using an encapsulant.

That is, a plurality of bidirectional OLEDs are manufactured in the same manner as in FIG. 3A, and these are called upper and middle devices, respectively. The bidirectional OLED of FIG. 3A includes a first electrode 102 made of a transparent conductive material, an organic EL layer 103 made of at least one organic material, a second cathode 104 made of a transparent conductive material, and a transparent conductive material. And a protective layer 105.

In addition, a top emitting OLED device is manufactured in the same manner as in FIG. 3B, and this is called a bottom device. The upper emission type OLED of FIG. 3B includes a first electrode 202 made of a material having good reflectivity, an organic EL layer 203 made of at least one organic material, and a second cathode 204 made of a transparent conductive material. ) And a protective layer 205.

And only the peripheral portion of the light emitting region of the upper, middle, and lower elements are bonded using an encapsulant as shown in FIG. 6B.

Meanwhile, although the present invention is not shown in the first to fifth embodiments, a getter for absorbing moisture and oxygen in the bonded device may be used.

Sixth embodiment

FIG. 7 shows an example of using a bottom light emitting OLED instead of a top light emitting OLED as a lower device as a sixth embodiment of the present invention. At this time, however, a seal cap 301 should be used.

In FIG. 7, each of the upper, middle, and lower elements is formed by sequentially stacking a first electrode, an organic EL layer, and a second electrode on a substrate, and only an encapsulant around the emission region of the upper, middle, and lower elements is used. It shows an example of the combination.

Meanwhile, the present invention may bond the upper, middle, and lower elements manufactured as shown in FIG. 7 by using an adhesive instead of an encapsulant.

In addition, according to the present invention, a protective layer may be further stacked on the second electrode when fabricating the upper, middle, and lower elements. Each of the upper, middle, and lower elements in which the protective layer is stacked may be bonded by using an adhesive, or only around the emission area of each device may be bonded by using an encapsulant.

And a getter (Getter) is attached to the sealing cap 301 by using an adhesive to absorb moisture and oxygen.

On the other hand, the terms used in the present invention (terminology) are terms defined in consideration of the functions in the present invention may vary according to the intention or practice of those skilled in the art, the definitions are the overall contents of the present invention It should be based on.

In addition, in the present invention, since the present invention has been described through the preferred embodiment of the present invention, in view of the technical difficulty aspects of the present invention, a person having ordinary skill in the art may easily perform another embodiment of the present invention. Other variations can be made. Therefore, it is apparent that all of the embodiments and variations cited in the above description belong to the claims of the present invention.

As described above, according to the organic EL device according to the present invention, by combining at least a plurality of OLEDs to produce a BLU for general lighting or LCD, it is possible to easily increase the brightness and illuminance, and at the same time does not affect the device life have. It also has the effect of matching the color of light required by general lighting and BLU, or easily increasing the color purity.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit of the present invention.

Therefore, the technical scope of the present invention should not be limited to the contents described in the embodiments, but should be defined by the claims.

Claims (20)

An upper element in which a first electrode, an organic EL layer, and a second electrode are sequentially stacked on the upper substrate; A lower element disposed to face each other at a predetermined interval from the second electrode of the upper element, and having a first electrode, an organic EL layer, and a second electrode sequentially stacked on the lower substrate; And, And an adhesive formed in at least one of a light emitting region and a non-light emitting region of the upper element and the lower element to bond the upper element and the lower element. According to claim 1, The first and second electrodes of the upper and lower elements are an anode, and the second electrode is an organic EL element. The method of claim 1, wherein the first electrode of the upper element An organic EL device comprising any one of ITO, an organic conductive material, an alloy and a multi-layer of a metal and a metal, and a mixture of the above materials. The method of claim 3, wherein the first electrode of the upper element An organic EL device characterized by depositing Cr on any one of Al, AlNd, and Ag. The method of claim 1, wherein the second electrode of the upper and lower elements, respectively An organic EL device comprising any one of ITO, an organic conductive material, an alloy and a multi-layer of a metal and a metal, and a mixture of the above materials. The method of claim 5, wherein the second electrode of the upper and lower elements, respectively An organic EL device characterized by depositing ITO on either of Al and Mg-Ag. The method of claim 5, wherein the second electrode of the upper and lower elements, respectively An organic EL device, which is formed by depositing an inorganic material on any one of Al and Mg-Ag. According to claim 1, An organic EL device, characterized in that a passivation layer is further laminated on the second electrodes of the upper and lower devices, respectively. The method of claim 8, wherein the protective layer An organic EL device comprising one of an organic material, an inorganic material, and a multi-layer thereof. The method of claim 1, wherein the upper and lower elements An organic EL device characterized in that the bonding using an adhesive (Adhesive). According to claim 1, The organic EL device, characterized in that only the peripheral portion of the light emitting region of the upper and lower devices are bonded using a sealing material. According to claim 1, The first electrode, the organic EL layer, and the second electrode are sequentially stacked on the middle substrate, are disposed at predetermined intervals between the upper element and the lower element, and are bonded to the upper element and the lower element by the adhesive. An organic EL device further comprising a device. The method of claim 12, And an passivation layer on each of the second electrodes of the upper, middle, and lower elements. According to claim 1, The first electrode, the organic EL layer, and the second electrode are sequentially stacked on the middle substrate, and are disposed at predetermined intervals between the upper element and the lower element, and are bonded to the upper element and the lower element by an encapsulant. An organic EL device further comprising a device. The method of claim 14, And an passivation layer on each of the second electrodes of the upper, middle, and lower elements. According to claim 1, wherein the second electrode of the upper element or the lower element further comprises an encapsulation cap located on the second electrode so as to have a predetermined distance from the second electrode, and attached by an encapsulant EL element. An upper element in which a first electrode, an organic EL layer, and a second electrode are sequentially stacked on the upper substrate; A lower element disposed to face each other at a predetermined interval from the second electrode of the upper element, and having a first electrode, an organic EL layer, and a second electrode sequentially stacked on the lower substrate; A central element disposed to face each other at a predetermined distance from the second electrode of the upper element or the lower element, and a first element, an organic EL layer, and a second electrode sequentially stacked on the central substrate; And, And an adhesive formed in at least one of the light emitting region and the non-light emitting region of the upper, middle, and lower elements to bond the upper, middle and lower elements to each other. An upper element in which a first electrode, an organic EL layer, and a second electrode are sequentially stacked on the upper substrate; A lower element disposed to face each other at a predetermined interval from the second electrode of the upper element, and having a first electrode, an organic EL layer, and a second electrode sequentially stacked on the lower substrate; A central element disposed to face each other at a predetermined distance from the second electrode of the upper element or the lower element, and a first element, an organic EL layer, and a second electrode sequentially stacked on the central substrate; And, And an encapsulation material formed in the non-emission region of the upper, middle, and lower elements to bond the upper, middle, and lower elements to each other. An upper element in which a first electrode, an organic EL layer, a second electrode, and a protective layer are sequentially stacked on the upper substrate; A lower element disposed to face each other at a predetermined interval from the protective layer of the upper element, and a first electrode, an organic EL layer, a second electrode, and a protective layer sequentially stacked on the lower substrate; A central element disposed to face each other at a predetermined interval from the protective layer of the upper element or the lower element, wherein the first element, the organic EL layer, the second electrode, and the protective layer are sequentially stacked on the central substrate; And, And an adhesive formed in at least one of the light emitting region and the non-light emitting region of the upper, middle, and lower elements to bond the upper, middle and lower elements to each other. An upper element in which a first electrode, an organic EL layer, a second electrode, and a protective layer are sequentially stacked on the upper substrate; A lower element disposed to face each other at a predetermined interval from the protective layer of the upper element, and a first electrode, an organic EL layer, a second electrode, and a protective layer sequentially stacked on the lower substrate; A central element disposed to face each other at a predetermined interval from the protective layer of the upper element or the lower element, wherein the first element, the organic EL layer, the second electrode, and the protective layer are sequentially stacked on the central substrate; And, And an encapsulation material formed in the non-emission region of the upper, middle, and lower elements to bond the upper, middle, and lower elements to each other.

Images