JP2003257622A - Organic el display device and manufacturing method therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To perform external sealing for allowing hardening in a short time and internal sealing for transmitting light from a light emission layer to a color filter without reflecting it by matching a position of the organic EL light emission layer with a position of the color filter accurately. <P>SOLUTION: This organic EL display device is constituted by sealing and bonding a thin film transistor formed on a substrate, an organic light emitting element constituted by laminating an anode, the light emission layer, a cathode, and a protection layer, and a laminate of the color filter and a black mask formed on the transparent substrate by matching the position of the organic EL light emission layer with the position of the color filter. A section between the substrate and the transparent substrate is sealed by an outer peripheral sealing layer and an inside sealing layer. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an organic EL display having high definition, excellent environmental resistance and productivity, which can be applied to a wide range of applications such as displays of portable terminals and industrial measuring instruments, and in particular, The present invention relates to a so-called top emission type organic EL display and a manufacturing method thereof.

[0002]

2. Description of the Related Art In recent years, the speed of information communication and the range of applications have been rapidly increasing. Among them, various inventions have been made on the display device, which is a high-definition display device having low power consumption and high-speed responsiveness that can meet the requirements of portability and moving image display. Above all, a driving type color display device using a thin film transistor (hereinafter, also referred to as a TFT) is being considered for the colorization type. In this case, T
In the configuration where light is extracted to the side of the substrate on which the FT is formed,
Since the aperture ratio does not increase due to the light shielding effect of the wiring portion, recently, a structure for extracting light to the side opposite to the substrate on which the TFT is formed, that is, a top emission type display device has been developed.

Even in the case of the top emission type, red,
In the structure in which the luminous bodies of the three primary colors of blue and green are separately arranged in a matrix, it is necessary to arrange the luminous materials for RGB with high precision in a matrix, so that it is difficult to manufacture efficiently and inexpensively. However, at the same time, the three types of light-emitting materials have different brightness change characteristics and driving conditions, and thus it is difficult to ensure color reproducibility for a long time.

In addition, a color filter is used for a backlight that emits white light, and the three primary colors are transmitted and separated.
The problem of high backlight efficiency remains. In the color conversion type in which the phosphors that are separately arranged absorb each other, and each phosphor emits multicolored fluorescence,
By adopting the top emission type using the T drive system, there is a possibility that an organic EL display with high definition and high brightness can be provided.
It is disclosed in Japanese Patent Laid-Open No. 59 and Japanese Patent Laid-Open No. 2000-77191.

An example of a conventional top emission type organic EL display is shown in FIG. 2 as a schematic sectional view. The TFT 2, the anode 3, the organic EL light emitting layer 4, and the cathode 5 are formed on the substrate 1. Then, the color filter 12 and the black mask 13 are formed on the transparent substrate 11. Next, substrate 1
A sealing layer 31 is formed on the periphery of, using, for example, a room temperature curable two-component epoxy adhesive, and is bonded to a transparent substrate. At this time, an internal space 32 is formed between the two substrates. The curing time of the sealing layer 31 is 24 hours at room temperature, which is a considerably long time, and when the organic EL light emitting layer and the color filter are aligned with each other, the sealing layer 31 is fixed during the room temperature curing so as not to be displaced. Need to do so.

In the display shown in FIG. 2, it is necessary that the EL element has a detailed color display function, the EL element has long-term stability including color reproducibility, and can be manufactured in a short time.

[0007]

In the organic EL display having the structure shown in FIG. 2, precise alignment between the organic EL light emitting layer 4 and the color filter 12 is required, and the sealing layer is required until the alignment is completed. The adhesive used for No. 31 is required to be able to freely perform alignment adjustment without changing properties such as viscosity change and gelation. On the other hand, when the alignment is completed, the contradictory curing characteristics that the curing must be completed quickly are required.

Further, due to the influence of the internal space 32 formed between the two substrates, there is a problem that the light emitted from the organic EL light emitting layer 4 is reflected at the air layer interface having a large difference in refractive index.
In order to solve this problem, it is possible to fill the internal space 32 with a material having a large refractive index and cure the material. However, for example, when the elastic modulus of the material to be filled is high, there is a serious problem that peeling occurs from the organic EL light emitting layer and the color filter layer due to the thermal stress generated by the temperature change of the use environment.

Incidentally, Japanese Patent Application Laid-Open No. 3-190084 describes that two substrates are adhered to each other by using an epoxy resin at their adhering portions, and an internal space is filled with an insulating material. However, in the invention disclosed in Japanese Patent Laid-Open No. 190084/1993, a top emission type organic EL is used.
The problem peculiar to the display has not been solved. First
In addition, since it is necessary to perform accurate alignment between the organic EL light emitting layer and the color filter, the adhesive must not start curing during alignment, and at the time when alignment is completed, the adhesive cannot be cured. That is, the short-time curing is required for the outer peripheral sealing layer. Secondly, a material having a high refractive index and a function of mitigating peeling due to thermal stress as a function of effectively transmitting light to the color filter without reflecting light from the organic EL light emitting layer is used as the internal sealing layer. This is the point required.

It is an object of the present invention to perform a precise alignment between an organic EL light emitting layer and a color filter, and a peripheral sealing structure capable of curing for a short time, and to prevent light from the organic EL light emitting layer from being reflected. It is an object of the present invention to provide an organic EL display capable of effectively transmitting to a color filter, preventing intrusion of moisture or the like from the external environment, and maintaining stable light emitting characteristics for a long period of time, and a manufacturing method thereof.

[0011]

In order to achieve the above-mentioned object, according to the present invention, a thin film transistor having a source and a drain formed on a substrate, and the source or the drain connected to the upper portion of the thin film transistor. A first electrode made of a conductive thin film material, an organic EL light emitting layer,
And an organic EL light-emitting element that is formed by laminating a second electrode including at least a transparent conductive material and a protective layer, and is driven by the thin film transistor, a transparent substrate, and a color formed on the transparent substrate. In an organic EL display in which a laminated body having a conversion filter layer is sealed and bonded by aligning the organic EL light emitting layer and the color conversion filter layer, a peripheral sealing for sealing and bonding a substrate and a transparent substrate. It is assumed that a layer and an inner sealing layer filled to suppress reflection of light emitted from the organic EL light emitting layer at the internal space interface are provided inside the outer peripheral sealing layer.

Here, an ultraviolet curable adhesive or a visible light curable adhesive is used for the outer peripheral sealing layer, and an elastic transparent sealing agent having a refractive index of 1.3 to 2.5 is used for the inner sealing layer. Preferably. A transparent silicone rubber material or a transparent silicone gel material may be used as the elastic transparent sealant. On the other hand, the manufacturing method of the present invention comprises a thin film transistor having a source and a drain formed on a substrate, a first electrode made of a conductive thin film material connected to the source or the drain on the thin film transistor, and organic EL light emission. A layer, a second electrode including at least a transparent conductive material, and a protective layer, and a step of forming an organic EL light emitting device driven by the thin film transistor; a transparent substrate; A step of forming a laminated body having a color conversion filter layer formed on a substrate, and accurate alignment of the outer peripheries of the substrate and the transparent substrate with an outer peripheral sealing layer partially having an uncoated portion And a step of filling the space surrounded by the substrate, the transparent substrate, and the outer sealing layer with the inner sealing layer from the uncoated portion, and the outer peripheral sealing. And further comprising the step of closing the uncoated portion of the layer, the.

The outer peripheral sealing layer has a function of accurately aligning the organic EL light emitting layer and the color filter and curing in a short time, and a function of preventing moisture or the like from entering from the external environment after curing. Therefore, the above materials are suitable. Since the internal sealing layer transmits the light from the organic EL light emitting layer to the color filter, it has a high refractive index and is required to have a function of preventing peeling due to curing shrinkage during curing and mitigating peeling due to thermal stress from ambient temperature. Therefore, the refractive index is 1.3 to 2.5, and the compression elastic modulus is 50 kg / mm ² (490M
The above materials below Pa) are suitable. Regarding the refractive index, the refractive index of other constituent elements (eg, cathode) of the organic light emitting device is 1.
Since it is in the range of 3 to 2.5, filling the material in this range, that is, reducing the difference in refractive index, leads to reduction of light loss. Further, the above range of the compression elastic modulus is a value obtained empirically.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION The organic EL display of the present invention will be described below. FIG. 1 is a configuration cross-sectional view of an organic EL display showing an embodiment of the present invention. In the following description, the case where the first electrode is the anode 3 will be described.
The first electrode can also be the cathode.

A. Organic EL Light Emitting Element The organic EL light emitting element of the present invention includes a substrate 1, a TFT 2 formed on the substrate 1, a flattening insulating film (not shown), an anode 3, an organic EL light emitting layer 4, and a cathode 5. And a protective layer 6. 1: TFT part The TFT part of the organic EL display of the present invention is the substrate 1
A TFT 2, a flattening insulating film, and an anode 3.

TFTs 2 are arranged in a matrix on an insulating substrate made of glass, plastic, or the like, or a substrate 1 having a semiconductive or conductive substrate on which an insulating thin film is formed, and an anode 3 corresponding to each pixel is formed. The source electrode is connected to. A flattened insulating film is formed on the TFT 2. This insulating film is provided in a portion other than the portion necessary for connecting the source electrode and the anode 3 and for connecting other circuits, and flattens the surface of the substrate 1 to facilitate formation of a highly precise pattern in the subsequent layer. The source electrode and the anode 3 may be connected by a conductive plug filled in a contact hole provided in the planarization insulating film.

The anode 3 is formed on the flattening insulating film formed on the TFT 2. A material having a large work function is used for the anode 3 in order to efficiently inject holes. In the case of the top emission method of the present invention, the anode 3 does not need to be transparent, but a conductive metal oxide such as ITO or IZO can be used. Furthermore, when a conductive metal oxide such as ITO is used, a metal electrode with high reflectance (aluminum, silver, molybdenum, tungsten, etc.) is formed under the conductive metal oxide.
Is preferably used. Since this metal electrode has a resistivity lower than that of the conductive metal oxide, it functions as an auxiliary electrode, and at the same time, reflects the light emitted from the organic EL light emitting layer 4 toward the color filter 12 side to effectively use the light. It is possible to plan.

When the first electrode is used as a cathode, TF
It is connected to the drain of T2. Further, instead of the conductive metal oxide, an electron injection consisting of a material having a small work function such as lithium, sodium or the like alkali metal, potassium, calcium, magnesium, strontium or the like alkaline earth metal, or a fluoride or the like thereof. Use a metal or an alloy or compound with other metals. 2: Organic EL light emitting layer and cathode The organic EL light emitting layer 4 and the cathode 5 are provided on the TFT 2 portion in which the TFT 2 and the anode 3 are patterned. When the color conversion method is used, the near-ultraviolet to visible region light, preferably the blue to blue-green region light emitted from the organic EL light emitting layer 4 is made incident on the color conversion filter layer, and visible light having a desired color is obtained. To release.

When the organic EL light emitting layer 4 is expressed by a structure in which the anode 3 and the cathode 5 are combined, if necessary, a hole injection layer,
It has a structure in which a hole transport layer and / or an electron injection layer are interposed, and specifically, one having the following layer structure is adopted. Anode, organic EL light emitting layer, cathode anode, hole injection layer, organic EL light emitting layer, cathode anode, organic EL light emitting layer, electron injection layer, cathode anode, hole injection layer, organic EL light emitting layer, electron injection layer, cathode Known materials are used as materials for the anode, hole injection layer, hole transport layer, organic EL light emitting layer, electron injection layer, and cathode.
In order to obtain blue to blue green light emission, for example, a fluorescent brightening agent such as a benzothiazole type, a metal chelated oxonium compound, or the like is preferably used in the organic EL light emitting layer 4.

The material used for the cathode 5 is required to have a small work function in order to efficiently inject electrons. Furthermore, in the top emission color conversion system of this embodiment,
Since the light from the organic EL light emitting layer 4 is emitted through the cathode 5, it is necessary to be transparent in the wavelength range of this light. In order to make these two characteristics compatible with each other, in the present invention, the cathode 5 preferably has a laminated structure composed of a plurality of layers. This is because a material having a low work function generally has low transparency. That is, an alkali metal such as lithium or sodium is added to a portion in contact with the organic EL light emitting layer,
A thin film of an alkaline earth metal such as potassium, calcium, magnesium, or strontium, an electron-injecting metal such as a fluoride thereof, an alloy with another metal, or a compound is used. It is possible to more efficiently inject electrons by using a material having a low work function, and by using a thin film, it is possible to minimize deterioration in transparency due to these materials. A transparent conductive film such as ITO or IZO is formed on this thin film. These conductive films function as an auxiliary film, reduce the resistance value of the entire cathode 5, and can supply a sufficient current to the organic EL light emitting layer.

When the second electrode is used as the anode, it is necessary to use a material having a large work function in order to enhance the hole injection efficiency. Further, the light emitted from the organic EL light emitting layer 4 is the second
It is necessary to use a highly transparent material in order to pass through the electrodes of ITO and IZO are preferred. 3: Protective layer 6 The protective layer 6 is provided so as to cover the layers below the second electrode formed as described above. The protective layer 6 is effective in preventing the permeation of oxygen, low molecular weight components, and water from the external environment and preventing the functional deterioration of the organic EL light emitting layer 4 due to them. The protective layer 6 facilitates the formation of other layers thereon,
It preferably has an appropriate hardness.

To meet these requirements, the protective layer 6
Has high transparency in the visible range (400 to 700 nm).
(Transmittance of 50% or more in the above range), electrical insulation, barrier properties against moisture, oxygen, etc., and preferably a material having a film hardness of 2H or more. For example, SiO
x, SiNx, AlOx, TiOx, TaOx, ZnO
Materials such as inorganic oxides such as x and inorganic nitrides can be used.
As the method of forming this protective layer, a sputtering method, a vapor deposition method,
There are a dip method, a CVD method and the like.

As the protective layer 6, various polymer materials can be used. Imide-modified silicone resin,
A material in which an inorganic metal compound such as titanium oxide is dispersed in acrylic, polyimide, silicone resin or the like can be used. The above-mentioned protective layer 6 may be a single layer, but when a plurality of layers are laminated, the effect is great. The protective layer 6 has a thickness of 0.
It is preferably 1 to 10 μm. B. Color Conversion Filter The color conversion filter of the present invention includes a transparent substrate 11 that is a second substrate, a color filter 12 and / or a color filter 12 that is laminated on the transparent substrate 11 and corresponds to each desired color, and is not shown. A laminate with the fluorescence conversion layer,
And a black mask 13. In the present specification,
“Color conversion filter” is a general term for a transparent substrate, a color filter 12, and a laminate of the color filter 12 and a fluorescence conversion layer. 1: Transparent Substrate The transparent substrate 11 is preferably a film-shaped plastic material. A suitable thickness is 20 μm to 500 μm. By using film-shaped plastics as the substrate, the organic EL display of the present invention can be made lighter in weight and stronger in bending stress than when glass is used. However, in the present invention, as the transparent substrate,
It does not exclude glass.

The term "transparent" as used herein refers to a material that transmits 10% to 100% of visible light, but the visible light transmittance also depends on the conversion performance of the fluorescent dye used in the fluorescent conversion layer. However, it is preferably about 40 to 80%. 2: Color Conversion Filter Layer In this specification, the color conversion filter layer is the color filter 12 or a laminated body of the color filter 12 and a fluorescent conversion layer (not shown). The fluorescence conversion layer absorbs light in the near-ultraviolet region or visible region, particularly light in the blue or blue-green region emitted by the organic EL light emitting layer, and emits visible light of different wavelengths as fluorescence. To enable full color display, separate layers are provided that emit at least blue, green and red light.

Regarding red, it may be formed only from the fluorescence conversion layer. However, when sufficient color purity cannot be obtained only by conversion with a fluorescent dye, a laminate of a fluorescence conversion layer and a color filter may be used. Green is the same as red. On the other hand, for blue, when the organic EL light emitting layer emits blue light, only the color filter can be used. The thickness is preferably 1 to 10 μm.

As is well known, the shape of the color conversion filter layer may be a stripe pattern in which each color is separated, or a structure in which it is separated for each subpixel of each pixel. A black mask 13 is preferably formed in the region between the color conversion filter layers corresponding to each color. Providing a black mask prevents light from leaking to the color conversion filters of adjacent sub-pixels,
It is possible to obtain only the desired fluorescence conversion color without bleeding. The black mask preferably has a thickness of 1-6 μm. C. Sealing Layer 1: Inner Sealing Layer The inner sealing layer 22 fills the inner space 32 formed in the conventional display, suppresses reflection of light emitted from the organic EL light emitting layer 4 at the inner space interface, and emits light. Are provided in order to efficiently transmit the light to the color filter 12. The inner sealing layer 22 is formed of a material having a visible light transmittance of 10 to 100%, preferably 50% or more, and a refractive index of 1.3 to 2.5 with respect to light having a wavelength of 400 to 800 nm. It Examples of such materials include organic materials such as transparent silicone rubber, transparent silicone gel.

The filler may be filled between the substrates through the injection port provided in the outer peripheral sealing layer 21 after the two substrates are pasted together by the outer peripheral sealing layer. By using such a filler, it is possible to reduce the difference in the refractive index of the transmission path of the light emitted from the organic EL light emitting layer 4, suppress the reflection at each interface, and further transmit the light to the color filter 12. It becomes possible to carry out efficiently. 2: Outer peripheral sealing layer The outer peripheral sealing layer 21 is provided on the outer peripheral portion of the substrate, adheres the substrate 1 and the transparent substrate 11, and protects each internal constituent element from oxygen, moisture and the like in the external environment. Outer peripheral sealing layer 21
Is formed of a visible light curable adhesive or an ultraviolet curable adhesive, and may have beads having a diameter of 3 to 50 μm therein. In this case, the beads can define the distance between the substrates and bear the pressure applied for adhesion. Further, the stress generated when the display is driven is also borne and the deterioration of the display due to this stress is prevented.

When the inner sealing layer 22 is formed by injection after the substrate 1 and the transparent substrate 11 are bonded together, an uncoated portion is provided in a part of the outer peripheral sealing layer 21, and this uncoated portion is internally sealed. Can be used as an injection port for a stop layer. This inlet is
After the injection is complete, the peripheral sealing layer material can be deposited and cured to plug it. Example 1 An example of the present invention will be specifically described below.

A TFT 2, an anode 3, an organic EL light emitting layer 4, a cathode 5 and a protective layer 6 are sequentially formed on a substrate 1 (a glass substrate in this embodiment). Next, the color filter 12 and the black mask 13 are sequentially formed on the transparent substrate 11 (transparent glass substrate in this embodiment). The two substrates thus formed are subjected to the next step in a dry nitrogen atmosphere in a glove box (both oxygen and water concentrations are 1 ppm or less).

A dispenser robot (adhesive coating device, X
Driven by a Y robot) to form an outer peripheral sealing layer 21 using an ultraviolet curable adhesive (manufactured by ThreeBond, trade name: 30Y-437), which is an epoxy material, and is transparent on the color filter 12 side. The glass substrate 11 is attached.

At this time, the coating shape of the outer peripheral sealing layer 21 is a shape in which an uncoated portion (not shown) is partially provided (in the present embodiment, the uncoated portion is provided in a portion of the outer periphery of the rectangular display). ) Is applied, and the uncoated portion is used later as a material injection port of the internal sealing layer 22. After that, alignment is performed so that the organic EL light emitting layer 4 and the color filter 12 correspond to each other, and a wavelength of 365 nm and a wavelength of 10 are set as ultraviolet curing conditions.
The outer peripheral sealing layer 21 is cured by irradiating with ultraviolet rays for 30 seconds at an illuminance of 0 mW / cm ² .

Next, from the injection port provided in a part of the outer peripheral sealing layer 21, the refractive index is about 1.
A transparent silicone rubber material with a compression elastic modulus of 45 and a compression elastic modulus of 0.5 kg / mm ² or less (manufactured by Shin-Etsu Chemical Co., Ltd., trade name: KE10
3) is injected and cured at 80 ° C. for 60 minutes to form the internal sealing layer 22. After that, the material injection port provided in the outer peripheral sealing layer 21 is sealed using the same UV-curable adhesive as the outer peripheral sealing layer 21, and the organic EL display is completed.

In this embodiment, blue light is emitted from the organic EL light emitting layer. Therefore, the color filter 12
B of No. 2 is composed of only a filter, but G and R of the color filter 12 have a fluorescent layer (not shown) that performs wavelength conversion laminated with the filter. The thickness of the inner sealing layer is 3 to 5 μm (maximum of about 10 μm), and the thickness of the outer peripheral sealing layer is 5 to 30 μm (maximum of about 100 μm).
Is.

As described above, the distance between the substrate 1 and the substrate 11 is fixed at a distance of 5 to 100 μm, moisture is prevented from entering from the external environment, and the organic EL display has long-term reliability. Becomes Here, according to the present invention, the organic EL light emitting layer 4 and the color filter 12 are formed by forming the display as in the above embodiment.
Accurate alignment with That is, the substrate 1
Positioning is performed by a marker (not shown) attached to each of the transparent substrate 11 and the transparent substrate 11. At this time, the adhesive used for the outer peripheral sealing layer 21 is required to have the following two characteristics. The applied adhesive needs to be able to be freely aligned (fine movement) without curing until both substrates are combined and the alignment by the marker is completed. It is required to complete curing in time. These two characteristics are satisfied by using the ultraviolet curable adhesive as described above and the visible light curable adhesive described below.

Embodiment 2 The basic structure of this embodiment is the same as that of the first embodiment. However,
A visible light curable adhesive is used for the outer peripheral sealing layer 21, and a transparent silicone gel material is used for the inner sealing layer 22. This visible light curable adhesive is, for example, LUXTRACK LCR0275, manufactured by Toagosei, and is an acrylic material. The curing conditions are: wavelength 400 nm, illuminance 100
mW / cm ² , irradiation time 30 seconds. The visible light curable adhesive has a cheaper irradiation device and is more costly than the ultraviolet curable adhesive. The transparent silicone gel material is Shin-Etsu Chemical Co., Ltd., trade name KE104Gel, and has a refractive index of about 1.45 and a compression elastic modulus of 0.5 kg / mm ^2.
It is the following.

[0036]

According to the present invention, as a result of adopting the above-mentioned structure, the outer peripheral sealing layer enables the organic EL light emitting layer and the color filter to be accurately aligned and fixed in a short time.
It has become possible to prevent the ingress of moisture and the like from the external environment. Furthermore, the internal sealing layer can prevent the reflection of light from the organic EL light emitting layer and can effectively transmit the light to the color filter, and at the same time, prevent the peeling due to the curing shrinkage at the time of curing and the ambient temperature. It has become possible to alleviate peeling due to thermal stress, prevent the ingress of moisture and the like from the external environment, and maintain stable emission characteristics over a long period of time.

[Brief description of drawings]

FIG. 1 is a sectional view showing a structure of an organic EL display of the present invention.

FIG. 2 is a sectional view showing a structure of a conventional organic EL display.

[Explanation of symbols]

1: substrate 2: Thin film transistor (TFT) 3: Anode 4: Organic EL light emitting layer 5: cathode 6: Protective layer 11: Transparent substrate 12: Color filter 13: Black mask 21: Peripheral sealing layer 22: Internal sealing layer 31: Sealing layer 32: Internal space

Claims (5)

[Claims] 1. A thin film transistor having a source and a drain formed on a substrate, a first electrode made of a conductive thin film material connected to the source or the drain, an organic EL light emitting layer, and at least an upper portion of the thin film transistor. An organic EL light emitting element that is formed by stacking a second electrode including a transparent conductive material and a protective layer, and is driven by the thin film transistor, a transparent substrate, and a color conversion filter formed on the transparent substrate. An organic EL display in which a laminate having a layer is sealed and joined by aligning the organic EL light emitting layer and the color conversion filter layer, and a peripheral sealing layer that seals and joins a substrate and a transparent substrate. And an inner sealing layer that is filled inside the outer peripheral sealing layer to suppress reflection of light emitted from the organic EL light emitting layer at the internal space interface. Organic EL display which is characterized. 2. The organic EL device according to claim 1, wherein an ultraviolet curable adhesive or a visible light curable adhesive is used for the outer peripheral sealing layer.
display. 3. The organic EL display according to claim 1, wherein an elastic transparent encapsulant having a refractive index of 1.3 to 2.5 is used for the inner encapsulating layer. 4. The organic EL display according to claim 3, wherein a transparent silicone rubber material or a transparent silicone gel material is used as the elastic transparent sealant. 5. A thin film transistor having a source and a drain formed on a substrate, a first electrode made of a conductive thin film material connected to the source or the drain, an organic EL light emitting layer, and at least an upper portion of the thin film transistor. A step of forming an organic EL light emitting element which is constituted by laminating a second electrode provided with a transparent conductive material and a protective layer, and is driven by the thin film transistor; a transparent substrate; and a transparent substrate formed on the transparent substrate. And a step of forming a laminate having a color conversion filter layer, and a step of precisely aligning and bonding the outer peripheries of the substrate and the transparent substrate with an outer peripheral sealing layer having an uncoated part in part. And a step of filling an inner sealing layer into a space surrounded by the substrate, the transparent substrate, and the outer sealing layer from the uncoated portion, and the uncoated portion of the outer peripheral sealing layer. Method of manufacturing an organic EL display, characterized in that and a step for closing the.