JP5573898B2 - Color filter for organic electroluminescence display - Google Patents

Description

  The present invention relates to a color filter for an organic electroluminescence display device, a method for producing the same, and an organic electroluminescence display device using the color filter for an organic electroluminescence display device.

  An organic electroluminescence (hereinafter abbreviated as “organic EL”) display device has high visibility due to self-coloring, and, unlike a liquid crystal display device, is an all-solid-state display, has excellent impact resistance, and has a high response speed. Attention has been focused on advantages such as little influence from temperature changes and a large viewing angle.

  The structure of the organic EL element is based on a laminated structure of anode / organic EL layer / cathode. Moreover, what combined the organic EL element side board | substrate which has such an organic EL element, and a color filter is known as an organic EL display apparatus which can perform a color display.

  Here, the organic EL layer used in the organic EL element has low resistance to moisture, oxygen, and other gas components, and shrinkage and dark pots are generated due to the influence of these moisture, oxygen, and other gas components. Here, “shrink” refers to a phenomenon in which the non-light-emitting area expands as time passes so that the light-emitting area contracts. A dark spot refers to a non-light emitting region such as a black spot generated immediately after the production of the organic EL element. This dark spot may also expand over time. That is, the organic EL element deteriorates with time due to the presence of moisture or the like.

  Further, the organic EL display device can perform color display by the color of light from the light emitting layer of the organic EL element, but the color of the light from the light emitting layer itself may not be good. is there. In this case, it is possible to perform color display with good color development by combining the organic EL element and the colored layer.

  However, in a display device using an organic EL element, the organic EL layer in the organic EL element has the above-described defects due to desorption gas generated from the color filter when the organic EL element and the color filter are bonded together. There was a problem that would occur.

In order to solve this problem, for example, in a color filter used in a passive matrix drive type organic EL display device, a Si-based transparent inorganic film such as silicon nitride or silicon oxynitride may be formed on the color filter. It has been proposed (see Patent Document 1).
In addition, in an active matrix driving type organic EL display device, it has been proposed to form a transparent inorganic film on a TFT side substrate.

However, in order for such a Si-based transparent inorganic film to have a gas barrier property, at least 1000 mm is required. Further, the passive type in which the organic EL element is formed on the color filter is required to have a high barrier property, so that at least 3000 mm or more is required.
Therefore, for example, when a film is formed by sputtering using silicon oxynitride, there is a problem that the process takes time, and the efficiency is low and the cost is high. Even if CVD is used, the problem of high cost does not change.
In addition, the film forming type manufacturing method has a problem that minute pinholes are generated, and it is difficult to form a transparent inorganic film having a perfect gas barrier property. In addition, when the transparent inorganic film is formed on the color filter, the transparent inorganic film is cracked, the transparent substrate is bent due to the stress of the transparent inorganic film, and the transparency decreases when the transparent inorganic film becomes thick. There was a problem.

  Moreover, since it is difficult for the transparent inorganic film as described above to have a complete gas barrier property, it has been difficult to prevent the entry of oxygen, water vapor, and the like from the outside into the colored layer. For this reason, there is a problem that the dye in the colored layer reacts with oxygen to accelerate the deterioration of the color filter.

  Furthermore, even in an organic EL display device combined with a color filter, better color development is desired for color display.

JP 2006-228705 A

  The present invention has been made in view of the above problems, and is an inorganic transparent substrate for preventing color mixing that is low in cost, excellent in gas barrier properties, and has good color development when used in an organic EL display device. It is a main object of the present invention to provide a color filter for an organic EL display device and a method for manufacturing the same, and an organic EL display device using the color filter for an organic EL display device.

  In order to achieve the above object, the present invention provides a transparent substrate, a toning layer formed on the transparent substrate, an adhesive layer formed on the toning layer, and the adhesive layer. A color filter for organic EL display devices, comprising an inorganic transparent substrate for preventing color mixing having a gas barrier property.

According to the present invention, since the inorganic transparent substrate for preventing color mixture is disposed on the toning layer by bonding with an adhesive, the inorganic transparent film having gas barrier properties is conventionally used as the toning layer. Compared with the case where it is directly formed on the substrate, the process can be completed in a shorter time, and the equipment used for film formation is not required. Therefore, a color filter for an organic EL display device can be obtained at low cost.
In addition, according to the present invention, since defects such as cracks and pinhole defects generated when the inorganic transparent film is directly formed on the toning layer do not occur, the gas barrier property can be improved.
In addition, according to the present invention, oxygen and water vapor can be prevented from entering the toning layer from the outside, so that the color filter can be prevented from deteriorating.
Furthermore, according to the present invention, when the organic EL display device is formed using the color filter for the organic EL display device, the inorganic transparent substrate for preventing color mixture is used for the light emitted from the light emitting layer of the organic EL display device. Since it has a function of preventing color mixing, it is possible to provide an organic EL display device with high luminance and high efficiency with little color mixing of each color.

  In the present invention, the toning layer is preferably a colored layer. This is because by adjusting the pigment contained in the colored layer, it is possible to adjust the color of the color filter for the organic EL display device to a favorable one.

  In the said invention, it is preferable that the thickness of the said inorganic transparent substrate for color mixing prevention exists in the range of 5 micrometers-200 micrometers. From the position where the light emitted from the light emitting layer of the organic EL display device enters the color mixture preventing inorganic transparent substrate from the position where the thickness of the color mixture preventing inorganic transparent substrate is within the above range, from the color mixture preventing inorganic transparent substrate. Since the distance in plan view of the surface of the transparent substrate to the position where light is emitted is reduced, color mixing of light can be prevented.

  In the above invention, when the organic EL display device is formed using the refractive index of the inorganic transparent substrate for preventing color mixture, the refractive index of the adhesive layer, and the color filter for the organic EL display device, the adhesion is achieved. The relationship between the refractive index of the contact layer in contact with the inorganic transparent substrate for preventing color mixing on the surface opposite to the agent layer side is as follows: refractive index of the adhesive layer ≧ refractive index of the inorganic transparent substrate for preventing color mixing ≧ refraction of the contact layer It is preferable that the inorganic transparent substrate for preventing color mixture and the adhesive layer are selected so as to achieve a rate. As a result, light emitted from the organic EL display device is refracted at each interface, so that the light emitted from the color mixing-preventing inorganic transparent substrate is more than the incident angle at which the light enters the color mixing-preventing inorganic transparent substrate. The corner can be reduced. Thereby, the color mixture of the light emitted from the light emitting layer can be prevented.

  In the said invention, when it is set as the organic EL display device using the said color filter for organic EL display devices on the surface of the said inorganic transparent substrate for color-mixing prevention, the light emitted from the light emitting layer of the said organic EL display device is carried out. It is preferable that the projections and depressions are formed so that the angle with respect to the vertical direction of the surface of the transparent substrate becomes small when passing through the inorganic transparent substrate for preventing color mixture. This is because such unevenness can prevent light color mixing.

  Moreover, in this invention, the said inorganic transparent substrate for color mixing prevention may have a recessed part for inserting a desiccant on the said inorganic transparent substrate for color mixing prevention. By having such a recess, a desiccant can be inserted between the color filter for an organic EL display device of the present invention and the organic EL element side substrate, thereby providing a more durable organic EL display device. It becomes possible to do.

  In the present invention, columnar spacers may be integrally formed on the inorganic transparent substrate for preventing color mixture. Since it is not necessary to separately form columnar spacers, the cost can be reduced.

In the present invention, an antireflection layer for preventing light emitted from the light emitting layer of the organic EL display device from being reflected on the surface of the inorganic transparent substrate for color mixture is provided on the inorganic transparent substrate for color mixture prevention. It may be.
By having the antireflection layer, it is possible to provide an organic EL display device that performs display with higher luminance.

  The present invention relates to a toning layer forming step for forming a toning layer on a transparent substrate, and an anti-color mixing method in which an adhesive layer is formed on the toning layer and an inorganic transparent substrate having gas barrier properties is bonded. Provided is a method for producing a color filter for an organic EL display device, which comprises an inorganic transparent substrate adhesion step and a color mixing prevention inorganic transparent substrate thinning step for thinning the color mixing prevention inorganic transparent substrate.

  According to the present invention, it is possible to manufacture a high-quality color filter for an organic EL display device at a low cost by having the above-mentioned inorganic transparent substrate adhesion step for preventing color mixing and the step of thinning an inorganic transparent substrate for preventing color mixture. Become. In addition, by adjusting the thickness of the inorganic transparent substrate for preventing color mixture, a function for preventing color mixture of light emitted from the light emitting layer from the organic EL display device can be imparted to the inorganic transparent substrate for preventing color mixture.

  The present invention provides a transparent substrate, a toning layer formed on the transparent substrate, an adhesive layer formed on the toning layer, and a color mixing prevention having a gas barrier property disposed on the adhesive layer. An organic EL display comprising: a color filter for an organic EL display device having an inorganic transparent substrate for use; and an organic EL element formed on the inorganic transparent substrate for preventing color mixing of the color filter substrate for the organic EL element. Providing equipment.

  According to the present invention, since the color filter for organic EL display device has the inorganic transparent substrate for preventing color mixture, the organic EL layer of the organic EL display device is damaged by the desorbed gas from the color filter. Can be prevented. Further, it is possible to prevent light emitted from the light emitting layer of the organic EL display device from being mixed in color. Therefore, an organic EL display device having high durability and good color development can be obtained.

  In the present invention, since an inorganic transparent layer having gas barrier properties is not formed by sputtering, CVD, ALE, etc., the cost can be reduced. In addition, since the inorganic transparent substrate for preventing color mixing used in the present invention is bonded to the toning layer by the adhesive layer, defects such as cracks do not occur, and the desorbed gas from the color filter for the organic EL display device It is excellent in gas barrier properties against. The inorganic transparent substrate for preventing color mixture has a function of preventing light from being mixed with light from the light emitting layer of the organic EL display device when the organic EL display device is used. By using the color filter for display device, there is an effect that a high-quality organic EL display device can be provided.

It is a schematic sectional drawing which shows an example of the color filter for organic EL display apparatuses of this invention. It is a schematic sectional drawing which shows another example of the color filter for organic EL display apparatuses of this invention. It is a schematic sectional drawing which shows another example of the color filter for organic EL display apparatuses of this invention. It is a schematic sectional drawing which shows another example of the color filter for organic EL display apparatuses of this invention. It is a schematic sectional drawing which shows another example of the color filter for organic EL display apparatuses of this invention. It is a schematic sectional drawing which shows another example of the color filter for organic EL display apparatuses of this invention. It is process drawing which shows an example of the manufacturing method of the color filter for organic EL display apparatuses of this invention. It is a schematic sectional drawing which shows an example of the organic electroluminescence display used for this invention. It is a schematic sectional drawing which shows another example of the organic electroluminescence display used for this invention. It is a schematic sectional drawing which shows another example of the organic electroluminescence display used for this invention. It is a schematic sectional drawing which shows another example of the organic electroluminescence display used for this invention. It is a schematic sectional drawing which shows another example of an organic electroluminescence display. It is a schematic sectional drawing which shows another example of an organic electroluminescence display.

The present invention includes a color filter for an organic EL display device, a method for producing a color filter for an organic EL display device, and an organic EL display device. Each will be described below.
A. First, the color filter for organic EL display devices of the present invention will be described.
The color filter for an organic EL display device of the present invention is disposed on a transparent substrate, a toning layer formed on the transparent substrate, an adhesive layer formed on the toning layer, and the adhesive layer. And an inorganic transparent substrate for preventing color mixing having a gas barrier property.

Here, the “inorganic transparent substrate for preventing color mixture” means a color mixture of light emitted from the light emitting layer of the organic EL display device when the organic EL display device is used as an organic EL display device. It has a function to prevent.
Further, the “function for preventing color mixture of light emitted from the light emitting layer of the organic EL display device” (hereinafter sometimes referred to as “color mixing prevention function”) refers to the light emitting layer of the organic EL display device. A transparent substrate from a position where light is incident on the inorganic mixture substrate for preventing color mixing to a position where light is emitted from the inorganic transparent substrate for preventing color mixture when emitted light is transmitted through the inorganic transparent substrate for preventing color mixture The function of reducing the distance in plan view of the surface, or the function of reducing the emission angle at which light is emitted from the inorganic transparent substrate for preventing color mixture than the incident angle at which light is incident on the inorganic transparent substrate for preventing color mixture is there.

Here, the reason why the light emitted from the light emitting layer of the organic EL display device is mixed is described.
FIG. 12 is a schematic cross-sectional view showing an example of an organic EL display device. As shown in FIG. 12A, the organic EL display device 30 includes a transparent substrate 1 and a colored layer formed on the transparent substrate 1 (in FIG. 12, a red colored layer 2R, a green colored layer 2G, and a blue colored layer). 2B), a light shielding portion 5 formed between colored layers, an adhesive layer 3 formed on the colored layer, and an inorganic transparent substrate 4 ′ disposed on the adhesive layer 3 A color filter, a transparent electrode layer 24 formed on the inorganic transparent substrate 4 ', an organic EL layer 23 including a light emitting layer, a back electrode layer 22, and an insulating layer 26 disposed between the transparent electrode layers It is. Here, in FIG. 12, for the sake of explanation, configurations other than the light emitting layer of the organic display device, both electrode layers, and the color filter for the organic EL display device are omitted. In FIG. 12, the toning layer is a colored layer.
The light emitted from the light emitting layer of the organic EL layer 23 usually travels in all directions. Therefore, even when the light emitted from the light emitting layer of the organic EL layer 23 passes through the colored layer of the color filter for the organic EL display device, the light is transmitted from all directions. For example, some of the light emitted from the organic EL layer 23 formed on the red colored layer 2R goes straight and passes through the color filter for the organic EL display device. Some of them pass through the color filter for organic EL display devices at a certain angle with respect to the vertical direction.
Further, for example, when an inorganic transparent substrate 4 ′ is disposed on the colored layer 2 in order to prevent degassing from the colored layer, the transparent substrate surface of the light L 1 refracted by the inorganic transparent substrate 4 ′. The angle with respect to the vertical direction becomes larger, proceeds through the inorganic transparent substrate 4 ′, the adhesive layer 3, the red colored layer 2 R, and the transparent substrate 1 and enters the eyes of the observer. At this time, when the light L1 reaches the area of the adjacent green colored layer 2G, the observer sees light L2 traveling straight from the green colored layer 2G and light L1 traveling from the adjacent red colored layer. Are mixed and observed. For this reason, there was a problem that good display could not be performed.
In addition, although not shown in FIG. 12, depending on the inorganic transparent substrate used, the light emitted from the light emitting layer of the organic EL layer is more adhesive from the inorganic transparent substrate than the incident angle at which the light enters the inorganic transparent substrate. In some cases, the emission angle of light emitted from the light source increases to the adjacent colored layer region, causing light color mixing.

FIG.12 (b) is an enlarged view of the part enclosed by A of Fig.12 (a). In order to provide the inorganic transparent substrate with the function of preventing the color mixture as described above, when the light L1 emitted from the light emitting layer of the organic EL display device passes through the inorganic transparent substrate 4 ′, the inorganic transparent substrate 4 is used. The distance α on the surface of the transparent substrate 1 from the position where the light is incident on “to the position where the light is emitted from the inorganic transparent substrate 4” may be reduced. In the present invention, this distance α is referred to as a “distance in plan view of the transparent substrate”.
The distance α includes an angle γ of the light L1 transmitted through the inorganic transparent substrate 4 ′ with respect to the vertical direction of the surface of the transparent substrate 1, and a position where the light transmitted through the inorganic transparent substrate 4 ′ is incident on the inorganic transparent substrate 4 ′. The vertical distance β of the surface of the transparent substrate 1 from the inorganic transparent substrate 4 ′ to the position where the light is emitted is greatly affected. When the angle γ is large, the distance α is also large, so that color mixture between lights transmitted through adjacent colored layers is likely to occur. Also, when the distance β is large, the distance α is large, so that the transmitted light spreads, so that color mixing tends to occur.
Therefore, by adjusting the angle γ or the distance β, the distance α can be reduced and color mixing can be prevented.

Next, the relationship between the incident angle of the light from the light emitting layer to the inorganic transparent substrate and the emission angle from the inorganic transparent substrate will be described with reference to FIG. FIG. 13 is a schematic cross-sectional view showing an example of an organic EL display device. For the sake of explanation, FIG. 13 shows an adhesive layer 3, an inorganic transparent substrate 4 ′ formed on the adhesive layer 3, and an inorganic transparent substrate 4 ′. The configuration other than the contact layer 9 in contact with the substrate 4 ′ is omitted. The contact layer 9 varies depending on the configuration of the organic EL display device, and examples thereof include an inert gas layer, a solid layer such as a desiccant and a transparent electrode layer.
As shown in FIG. 13, in the present invention, the light L of the light emitting layer proceeds in the order of the contact layer 9, the inorganic transparent substrate 4 ′, and the adhesive layer 3, and is observed through a colored layer and a transparent substrate, although not shown. Enter the eyes of those who are. At this time, as shown in FIG. 13A, when the emission angle θ emitted from the inorganic transparent substrate is larger than the incident angle δ where the light L emitted from the light emitting layer is incident on the inorganic transparent substrate, light is emitted from the light emitting layer. Since the region where the emitted light L travels becomes wider, it may reach the region of the colored layer of another color and cause color mixing.
On the other hand, as shown in FIGS. 13B to 13D, the emission angle θ emitted from the inorganic transparent substrate is smaller than the incident angle δ at which the light L emitted from the light emitting layer enters the inorganic transparent substrate. In this case, since the region in which the light L emitted from the light emitting layer travels is limited, color mixing can be prevented.
Therefore, color mixing can be prevented by selecting each member so that the emission angle θ is smaller than the incident angle δ.
Note that an angle γ in FIG. 13 is a refraction angle incident on the inorganic transparent substrate 4 ′ from the contact layer 9, and an angle incident on the adhesive layer 3 from the inorganic transparent substrate 4 ′.

  In the present invention, the “toning layer” is a layer for adjusting the color of light from the light emitting layer of the organic EL layer so that the organic EL display device performs color display with good color development. Specific examples include a colored layer, a color conversion layer, and a color layer and a color conversion layer.

Next, the color filter for organic EL display devices of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic cross-sectional view showing an example of a color filter for an organic EL display device of the present invention. Here, FIG. 1 shows the case where the toning layer is a colored layer.
As illustrated in FIG. 1, a color filter 10 for an organic EL display device of the present invention includes a transparent substrate 1 and a colored layer 2 formed on the transparent substrate 1 (in FIG. 1, a red colored layer 2R, a green colored layer). 2G, a blue colored layer 2B), an adhesive layer 3 formed on the colored layer 2, and an inorganic transparent substrate 4 for preventing color mixing and having a barrier property disposed on the adhesive layer 3. Here, the inorganic transparent substrate 4 for preventing color mixing has a function of preventing color mixing. In the present invention, as shown in FIG. 1, a light shielding portion 5 for defining pixels may be formed between the colored layers 2.

According to the present invention, it is possible to prevent the organic EL layer from being damaged by the desorbed gas generated from the toning layer by disposing the inorganic transparent substrate for preventing color mixture on the adhesive layer. It becomes possible. This inorganic transparent substrate for preventing color mixing can be lower in cost and gas barrier property than an inorganic transparent film having gas barrier properties formed on the toning layer using sputtering, CVD, or the like. It becomes.
In addition, since the inorganic transparent substrate for preventing color mixture having a gas barrier property is formed on the toning layer, it is possible to prevent oxygen and water vapor from entering the toning layer from the outside. The deterioration of the color filter due to the reaction between the dye in the color layer and oxygen can be suppressed.
The inorganic transparent substrate for preventing color mixing has a function of preventing color mixing of light emitted from the light emitting layer of the organic EL device when the organic EL display device is formed using the color filter for the organic EL display device. Therefore, it is possible to prevent light from the light emitting layer of the organic EL device from being mixed. Therefore, by using the color filter for an organic EL display device, it is possible to provide an organic EL display device with good color development, high luminance and high efficiency.
Each configuration will be described below.

1. Inorganic transparent substrate for color mixing prevention The inorganic transparent substrate for color mixing prevention used in the present invention is disposed on an adhesive layer to be described later, has a gas barrier property, and has a color filter for the organic EL display device. When used as an organic EL display device, it has a function of preventing color mixture of light emitted from the light emitting layer of the organic EL device.

The inorganic transparent substrate for preventing color mixture used in the present invention is not formed by using sputtering or the like on the toning layer described later, but has an adhesive layer in advance. It is arranged above.
In addition, the inorganic transparent substrate for preventing color mixture used in the present invention has a gas barrier property against gases such as water vapor, oxygen and desorption gas.
As the gas barrier property of the inorganic transparent substrate for preventing color mixture of the present invention, the oxygen transmission rate (OTR) is preferably 1 × 10 ⁻³ cc / m ² / day / atm or less, more preferably 1 × 10 ^−4. It is cc / m ² / day / atm or less.
Further, the water vapor transmission rate (WVTR) is preferably 1 × 10 ⁻⁵ g / m ² / day or less, more preferably 1 × 10 ⁻⁶ g / m ² / day or less.
The oxygen transmission rate and water vapor transmission rate were measured using the MOCON OX-TRAN equipment, and the water permeability was 23 ° C. and 90% RH, and the water permeability was MOCON's PERMATRAN-W equipment. It is a value measured in an environment of 40 ° C. and 90% RH.

As an aspect which provides the said color-mixing prevention inorganic transparent substrate to the said color-mixing prevention inorganic transparent substrate, the aspect (henceforth a 1st aspect) which thins the thickness of the said color-mixing prevention inorganic transparent substrate, and the said color-mixing prevention inorganic A mode of adjusting the refractive index by selecting a material used for the transparent substrate (hereinafter referred to as the second mode), a mode of forming irregularities on the surface of the inorganic transparent substrate for preventing color mixture (hereinafter referred to as the third mode). ).
Each will be described below.

(1) 1st aspect The inorganic transparent substrate for color-mixing prevention used for this aspect has gas barrier property, and provided the color-mixing prevention function by thinning the thickness of the inorganic transparent substrate for color-mixing prevention. is there.

  In this aspect, by reducing the thickness of the inorganic transparent substrate for preventing color mixing from the position where the light transmitted through the inorganic transparent substrate for preventing color mixing is incident on the inorganic transparent substrate for preventing color mixing, from the inorganic transparent substrate for preventing color mixing. The distance in the vertical direction of the transparent substrate surface to the position where the light is emitted becomes small. As a result, the distance in a plan view of the surface of the transparent substrate from the position where light is incident on the inorganic transparent substrate for preventing color mixture to the position where light is emitted from the inorganic transparent substrate for preventing color mixture is also reduced. Therefore, the light from the light emitting layer that has passed through the color filter for the organic EL display device can be prevented from reaching the adjacent colored layer region, so that color mixing of the light of each color can be prevented.

In the present invention, the thickness of the inorganic transparent substrate for preventing color mixture is preferably in the range of 5 μm to 200 μm, more preferably in the range of 10 μm to 100 μm, and particularly preferably in the range of 10 μm to 60 μm.
When the inorganic transparent substrate for preventing color mixture is thicker than 200 μm, light from the light emitting layer of the organic EL display device emits light from the inorganic transparent substrate for preventing color mixture from the position where the inorganic transparent substrate for preventing color mixture is incident. This is because the distance in plan view of the surface of the transparent substrate to the above position is increased, and light color mixture is likely to occur. Further, it is desirable that the thickness is thin, but processing of less than 5 μm is difficult in terms of processing technology. This is because there is a possibility that the thinner the inorganic transparent substrate for preventing color mixture is cracked, or the processing proceeds so much that the adhesive layer appears on the surface as the thickness becomes thinner.

The inorganic transparent substrate for preventing color mixing used in this embodiment is transparent, has a gas barrier property against gases such as water vapor, oxygen, and desorption gas, and can be bonded to the toning layer with an adhesive, and is a thin film There is no particular limitation as long as it is formed of an inorganic material that can be subjected to a chemical treatment.
As an inorganic transparent substrate for preventing color mixing used in this embodiment, it is preferable to use a glass material made of the same material as that used for a transparent substrate described later or a substrate of an organic EL display element side substrate. By aligning the thermal expansion coefficients of the transparent substrate or the organic EL display element side substrate and the inorganic transparent substrate for preventing color mixing, the same thermal elongation is applied when processing after bonding the inorganic transparent substrate for preventing color mixing. This is because the deflection of each substrate can be suppressed as much as possible.

As such an inorganic transparent substrate for preventing color mixing, alkali-free glass used for displays is desirable. Specifically, the glass of each glass manufacturing company such as OA10 (Nippon Electric Glass), AN100 (Asahi Glass), NA35 (NH Techno Glass), EAGLE (Corning), and 1737 materials (Corning) may be used. desirable.
Other materials such as soda lime, low refractive glass, and high refractive glass may be used. Basically, any glass having excellent gas barrier properties can be laminated.

  The size (area) of the inorganic transparent substrate for preventing color mixture used in this embodiment is appropriately selected depending on the size (area) of the color filter for organic EL display device used.

As a method for processing the inorganic transparent substrate for preventing color mixing used in this embodiment, the inorganic transparent substrate for preventing color mixing is arranged by a thinning method after being adhered to the toning layer by placing it on an adhesive layer described later. The method of making it thin is mentioned.
The thinning method may be a mechanical polishing method using a machine or a chemical thinning method such as etching.
The thinning process by the mechanical polishing method can improve the smoothness of the surface of the inorganic transparent substrate for preventing color mixing. Therefore, in the color filter for organic EL display device of this embodiment, the transparent electrode layer 24 seems to be formed on the inorganic mixed substrate 4 for preventing color mixture of the color filter 10 for organic EL display device, for example, as shown in FIG. When used in such an organic EL display device, it is preferable that the surface of the inorganic transparent substrate for preventing color mixing is excellent in smoothness. Therefore, it is preferable to perform the thinning process by a mechanical polishing method.
Moreover, the organic EL display device color filter according to the present embodiment includes, for example, as shown in FIG. In the case of being used in an organic EL display device that is sealed with the surface on which the film is formed facing, it is preferable to perform the thinning process by an etching method from the viewpoint of cost.
8 and FIG. 11 will be described in detail in the section of “C. Organic EL display device” to be described later, the description thereof is omitted here.

Such a mechanical polishing method is the same as the method of polishing a transparent substrate made of an inorganic material used in general precision equipment, and therefore description thereof is omitted here.
Further, the chemical thin film forming method may be dry etching or wet etching. Usually, wet etching is preferably used. This is because wet etching is advantageous in terms of cost and production efficiency, and since dissolution proceeds by a chemical reaction, it is easy to control the etching rate by selecting an etching agent. It is.

(2) Second Aspect The inorganic transparent substrate for preventing color mixing used in this embodiment has gas barrier properties, adjusts the refractive index by selecting a material used for the inorganic transparent substrate for preventing color mixing, and prevents color mixing. Is given.

  In this aspect, by selecting the material of the inorganic transparent substrate for preventing color mixing, when the light emitted from the organic EL display device passes through the inorganic transparent substrate for preventing color mixing, the light is transmitted to the inorganic transparent substrate for preventing color mixing. Since the emission angle at which light is emitted from the color mixing-preventing inorganic transparent substrate can be made smaller than the incident angle at which the light is incident, it is possible to prevent light transmitted through the color filter for organic EL display devices from being mixed. it can.

  In this embodiment, as shown in FIGS. 13 (b) to 13 (d), the light L from the color mixing-preventing inorganic transparent substrate 4 is larger than the incident angle δ at which the light L enters the color mixing-preventing inorganic transparent substrate 4. Although there is no particular limitation as long as the outgoing exit angle θ can be reduced, as shown in FIG. 13B, the incident angle δ> the refraction angle γ (incident angle γ)> the outgoing angle θ. More preferred. This is because the region in which the light from the light emitting layer of the organic EL display device travels can be more effectively limited with respect to preventing color mixing. FIG. 13C shows an aspect where the incident angle δ = the refraction angle γ (incident angle γ)> the output angle θ, and FIG. 13D shows the incident angle δ> the refraction angle γ (incident angle γ) = The aspect which becomes the output angle θ is shown.

The adjustment of each angle as described above is performed by adjusting the refractive index of the material used for each member.
In general, when passing light through two media, in order to make the refraction angle smaller than the incident angle, the refractive index of the medium on which light is refracted must be made larger than the refractive index of the medium on which light is incident. That's fine.
Therefore, in this aspect, the material is selected so that the refractive index of the inorganic transparent substrate for preventing color mixing is larger than the refractive index of the contact layer, and the refractive index of the adhesive layer is higher than the refractive index of the inorganic transparent substrate for preventing color mixing. It is preferable to select the material so that the rate is higher.

First, the relationship between an inorganic transparent substrate for preventing color mixing and an adhesive layer will be described. In this embodiment, the refractive index of the adhesive layer is preferably equal to or larger than the refractive index of the inorganic transparent substrate for preventing color mixing, and more preferably larger than the refractive index of the inorganic transparent substrate for preventing color mixing.
The difference in refractive index between the inorganic transparent substrate for preventing color mixing used in the present invention and the adhesive layer described later (refractive index of the adhesive layer−refractive index of the inorganic transparent substrate for preventing mixed color) is 0.2 or less. It is preferable.
When the difference in refractive index between the inorganic transparent substrate for preventing color mixture and the adhesive layer described later is less than the above range, the light emitted from the light emitting layer of the organic EL display device passes through the inorganic transparent substrate for preventing color mixture. This is because the angle with respect to the vertical direction of the surface of the transparent substrate when entering the adhesive layer becomes large, and there is a possibility that the function of preventing color mixing may not be obtained. Moreover, it is because the material which has a refractive index exceeding the said range is not normally used as a material of the inorganic transparent substrate for color mixing prevention.
Here, the difference in refractive index is measured using light in a wavelength region of 400 nm to 700 nm.

  The inorganic transparent substrate for preventing color mixing needs to take into account the difference in refractive index with the contact layer when an organic EL display device is formed using the color filter for organic EL display devices of the present invention.

Next, a relationship between the refractive index of the inorganic transparent substrate for preventing color mixture and the refractive index of the contact layer will be described.
When an organic EL display device is formed, specifically, the adhesive layer may be a solid layer such as a desiccant and a transparent electrode layer, and an inert gas layer.

When the contact layer is a solid layer, the refractive index of the inorganic mixed substrate for preventing color mixture is preferably equal to or larger than the refractive index of the solid layer, and more preferably larger than the refractive index of the solid layer. The difference in refractive index between the inorganic transparent substrate for preventing color mixing and the solid layer (refractive index of the inorganic transparent substrate for preventing mixed colors−refractive index of the solid layer) is preferably 0.5 or less, particularly preferably 0.1 or less. .
This is because a material having a refractive index exceeding the above range is usually not used as a material for an inorganic transparent substrate for preventing color mixing.

  When the contact layer is a solid layer, the material for the inorganic transparent substrate for preventing color mixture can be specifically the same as that described in “(1) First aspect”.

When the contact layer is an inert gas layer (such as N ₂ gas), the refractive index of the inert gas layer is about 1.0, and the refractive index of the inorganic transparent substrate for preventing color mixture is usually about 1 Since it is about .5, it is larger than the refractive index of the inert gas layer. In this case, the difference in refractive index between the inorganic transparent substrate for preventing color mixing and the inert gas layer (refractive index of the inorganic transparent substrate for preventing mixed colors−refractive index of the inert gas layer) is about 0.5. Further, when low refractive glass is used as an inorganic transparent substrate for preventing color mixing, the difference is about 0.4 because the refractive index is about 1.4.
Considering only the relationship between the refractive index of the inert gas layer and the refractive index of the inorganic transparent substrate for preventing color mixing, the difference in refractive index between the inorganic transparent substrate for preventing color mixing and the inert gas layer is preferably larger. .
However, in practice, if a material having a large refractive index is used for the inorganic transparent substrate for preventing color mixture so that the difference in refractive index between the inorganic transparent substrate for preventing color mixture and the inert gas layer is increased, It becomes difficult to make the difference in refractive index between the inorganic transparent substrate and the adhesive layer equal or large.
Therefore, when considering the relationship between the refractive index of the inert gas layer, the refractive index of the inorganic transparent substrate for preventing color mixing, and the refractive index of the adhesive layer, the refractive index of the inorganic transparent substrate for preventing mixed color and the inert gas layer The difference is preferably as small as possible.
In this embodiment, the difference in refractive index between the inorganic transparent substrate for preventing color mixing and the inert gas layer (refractive index of the inorganic transparent substrate for preventing mixed colors−refractive index of the inert gas layer) is 0.6 or less, especially 0.5 or less is desirable. The lower limit is about 0.1.
A material having a refractive index exceeding the above range is generally not used as a material for an inorganic transparent substrate for preventing color mixing.

The material of the inorganic transparent substrate for preventing color mixture used in this embodiment is transparent and exhibits gas barrier properties against gases such as water vapor, oxygen, and desorption gas, and can be bonded to the toning layer with an adhesive. There is no particular limitation as long as the relationship of the difference in refractive index in each layer described above is satisfied.
When the contact layer is an inert gas layer, light emitted from the organic EL display device proceeds in the order of the inert gas layer, the inorganic transparent substrate for preventing color mixture, and the adhesive layer. Since the refractive index of the inert gas is close to 1, the inorganic transparent substrate for preventing color mixture that satisfies the relationship of the refractive index of the inorganic transparent substrate for preventing mixed colors> the refractive index of the inert gas layer is preferably as low as possible. . When a material having a large refractive index is used for the inorganic transparent substrate for preventing color mixing, it is necessary to make the refractive index of the adjacent adhesive layer larger, so that there is a possibility that a normally usable adhesive cannot be used. Because there is.
Examples of the material of the inorganic transparent substrate for preventing color mixing include low refractive glass (glass having a refractive index of about 1.3 to 1.5).

The thickness of the inorganic transparent substrate for preventing color mixing used in this embodiment is a film thickness that does not break even when placed on the adhesive layer, can have gas barrier properties, and does not interfere with the color mixing preventing function. If it is a film thickness, it will not specifically limit.
As described in “(1) First aspect”, the inorganic transparent substrate for preventing color mixing used in this aspect can be further thinned to further enhance the color mixing prevention function. Accordingly, the film thickness described in “(1) First aspect” is preferable.

  About the magnitude | size (area) and shape of the inorganic transparent substrate for color-mixing prevention used for this aspect, it can be made to be the same as that of what was demonstrated in the term of "(1) 1st aspect".

(3) Third aspect When the inorganic transparent substrate for preventing color mixture used in this aspect is an organic EL display device using the color filter for organic EL display device on the surface of the inorganic transparent substrate for preventing color mixture, When the light emitted from the light emitting layer of the organic EL display device is transmitted through the inorganic transparent substrate for preventing color mixing, color mixing is performed by forming irregularities so that the angle with respect to the vertical direction of the surface of the transparent substrate is reduced. The prevention function is added.

  In this embodiment, the unevenness as described above is formed on the surface of the inorganic transparent substrate for preventing color mixing so that the light from the light emitting layer of the organic EL display device has an angle with respect to the vertical direction of the surface of the transparent substrate. Even if it has, it can be made into a thing smaller than the angle before injecting into the inorganic transparent substrate for color-mixing prevention by permeate | transmitting the inorganic transparent substrate for color-mixing prevention. Therefore, it is possible to limit a region where light from the light emitting layer travels and to prevent color mixture of light.

The inorganic transparent substrate for preventing color mixing used in this embodiment is one in which irregularities 8 are formed on the surface of the inorganic transparent substrate 4 for preventing color mixing as shown in FIG. The reference numerals that are not described with reference to FIG. 2 are the same as those in FIG.
In this aspect, when an organic EL display device is formed using the color filter for organic EL display device on the surface of the inorganic transparent substrate for preventing color mixture, the light emitted from the light emitting layer of the organic EL display device is The light emitted from the light emitting layer of the organic EL device is refracted by forming irregularities so that the angle with respect to the vertical direction of the surface of the transparent substrate becomes small when transmitted through the inorganic transparent substrate for preventing color mixing. The angle of the transparent substrate surface with respect to the vertical direction can be changed to be small. Therefore, the organic EL display device using the color filter for the organic EL display device according to the present embodiment is suppressed in color mixing of light of each color, has good color development, and has high luminance and high efficiency.

For example, as shown in FIG. 2A, the unevenness may be formed on the surface of the inorganic transparent substrate for preventing color mixture on the side facing the organic EL element side substrate of the organic EL display device. As shown in FIG. 2 (b), it may be formed on the surface of the adhesive layer side of the inorganic transparent substrate for preventing color mixing, and for example, as shown in FIG. 2 (c), an inorganic transparent substrate for preventing color mixing. It may be formed on both side surfaces. Especially, it is preferable to form in the surface by the side of the adhesive bond layer of the inorganic transparent substrate for color mixing prevention, or the both surface of the inorganic transparent substrate for color mixing prevention.
When the unevenness is formed on the surface of the inorganic transparent substrate for preventing color mixture on the adhesive layer side, the surface on the side facing the organic EL element side substrate is flat, so that it is easy to face the organic EL element side substrate.
Moreover, when the said unevenness | corrugation is formed in the both-sides surface of the inorganic transparent substrate for color mixing prevention, it is because a color mixing prevention function can be provided more highly.

The shape of the unevenness is a shape that can reduce the angle with respect to the vertical direction of the surface of the transparent substrate when light from the light emitting layer of the organic EL device passes through the inorganic transparent substrate for preventing color mixing. Although not particularly limited, the lens shape is particularly preferable.
Further, a nano-sized (400 nm or less) uneven shape, a triangular stripe, a pyramid shape, or the like can be used.
Further, the method for forming such unevenness is not particularly limited as long as it can form unevenness having a desired shape on the surface of the inorganic transparent substrate for preventing color mixing, and may be wet etching or dry etching. However, generally, wet etching is preferably used. This is because wet etching is advantageous in terms of cost and production efficiency, and since dissolution proceeds by a chemical reaction, it is easy to control the etching rate by selecting an etching agent. It is.

  The etching agent used for the etching is not particularly limited as long as the surface of the inorganic transparent substrate for preventing color mixture can be etched into a desired shape. For example, in the case of wet etching, hydrofluoric acid, For example, boron fluoride and carbon tetrafluoride are used in the case of dry etching.

  The wet etching and dry etching methods in this step are the same as those used when processing a transparent substrate made of a general inorganic material, and thus the description thereof is omitted here.

As the material used for the inorganic transparent substrate for preventing color mixing, the material is transparent and exhibits gas barrier properties against gases such as water vapor, oxygen, and desorption gas, and the unevenness as described above is formed on the surface of the inorganic transparent substrate for preventing color mixing. If it can form, it will not be specifically limited.
Specifically, since it can be the same as that described in the section “(1) First Mode”, description thereof is omitted here.

  As the thickness of the inorganic transparent substrate for preventing color mixing used in this embodiment, the unevenness as described above can be formed on the surface of the inorganic transparent substrate for preventing color mixing, and the film thickness can have gas barrier properties, and The film thickness is not particularly limited as long as it does not interfere with the color mixing prevention function. The thickness of such an inorganic transparent substrate for preventing color mixing is preferably in the range of 5 μm to 200 μm, more preferably in the range of 10 μm to 150 μm, and particularly preferably in the range of 20 μm to 100 μm. This is because it is difficult to form irregularities as described above on the surface when the above range is not satisfied, and there is a possibility that the color mixing prevention function may be hindered when the above range is exceeded.

  Since the size (area) and shape of the inorganic transparent substrate for preventing color mixing used in this embodiment can be the same as those described in the above-mentioned section “(1) First embodiment”, here. Is omitted.

(4) Others As an aspect for imparting a color mixing prevention function to the inorganic transparent substrate for color mixing prevention, any one of the three aspects described above may be selected and used, or two of the three aspects may be used. May be used in combination, or all three embodiments may be used.

Moreover, the inorganic transparent substrate for preventing color mixture used in the present invention may have a recess 6 for inserting a desiccant on the inorganic transparent substrate 4 for preventing color mixture, for example, as shown in FIG. For example, as shown in FIG. 4, columnar spacers 7 may be integrally formed on the inorganic transparent substrate 4 for preventing color mixture.
This is because the recesses and the columnar spacers can be formed together with the processing of the inorganic color prevention substrate for preventing color mixing, thereby reducing the number of steps and reducing the cost.
Here, reference numerals not described in FIG. 3 and FIG. 4 can be the same as those described in FIG.

The method for forming the recess is not particularly limited as long as the inorganic transparent substrate for preventing color mixture can be formed to have a desired recess. Further, the method for forming the columnar spacer is not particularly limited as long as a desired columnar spacer can be integrally formed on the color-mixing preventing inorganic transparent substrate.
In either case, it is usually formed by etching. The etching method may be dry etching or wet etching. Usually, wet etching is preferably used.

Furthermore, in the present invention, an antireflection layer for preventing light emitted from the light emitting layer of the organic EL display device from being reflected on the surface of the inorganic transparent substrate for color mixture is provided on the inorganic transparent substrate for color mixture prevention. May be.
Examples of such an antireflection film include low-refractive thin films such as SiO ₂ , MgF ₂ , Al ₂ O ₃ , and TiO ₃ .

2. Toning layer Next, the toning layer used in the present invention will be described. The toning layer used in the present invention is formed on a transparent substrate.

As described above, in the present invention, the “toning layer” is a layer that adjusts the color of light from the light emitting layer of the organic EL display device so that the organic EL display device performs color display with good color development. .
Such a toning layer is not particularly limited as long as the color of light from the light emitting layer of the organic EL display device can be adjusted to a desired color.
As an aspect of such a toning layer, the toning layer is a colored layer (fourth aspect), the toning layer is composed of a colored layer, and a color conversion layer formed on the colored layer. Examples include the aspect (fifth aspect) and the aspect (sixth aspect) in which the toning layer is a color conversion layer. Each aspect will be described below.

(1) Fourth Aspect In this aspect, the toning layer refers to a colored layer.
Such a colored layer is usually composed of three colors of red, green, and blue.

  The colored layers of each color are regularly arranged corresponding to the pixels. The arrangement of the colored layers is not particularly limited as long as the colored layers of the respective colors are arranged on an average when viewed macroscopically, and examples thereof include a stripe arrangement, a mosaic arrangement, and a delta arrangement.

The colored layer is obtained by dispersing or dissolving a colorant such as a pigment or dye of each color in a binder resin.
Examples of the colorant used in the red coloring layer include perylene pigments, lake pigments, azo pigments, quinacridone pigments, anthraquinone pigments, anthracene pigments, and isoindoline pigments. These pigments may be used alone or in combination of two or more.
Examples of the colorant used in the green coloring layer include phthalocyanine pigments such as halogen polysubstituted phthalocyanine pigments or halogen polysubstituted copper phthalocyanine pigments, triphenylmethane basic dyes, isoindoline pigments, and isoindolinone pigments. Etc. These pigments or dyes may be used alone or in combination of two or more.
Examples of the colorant used in the blue colored layer include copper phthalocyanine pigments, anthraquinone pigments, indanthrene pigments, indophenol pigments, cyanine pigments, dioxazine pigments and the like. These pigments may be used alone or in combination of two or more.

Moreover, transparent resin is mentioned as binder resin used for a colored layer.
When a printing method is used as a method for forming the colored layer, examples of the binder resin include polymethyl methacrylate resin, polyacrylate resin, polycarbonate resin, polyvinyl alcohol resin, polyvinyl pyrrolidone resin, hydroxyethyl cellulose resin, carboxymethyl cellulose resin, and polyvinyl chloride resin. Melamine resin, phenol resin, alkyd resin, epoxy resin, polyurethane resin, polyester resin, maleic acid resin, polyamide resin and the like.
In addition, when a photolithography method is used as a method for forming a colored layer, the binder resin is usually an ionizing radiation curing having a reactive vinyl group such as an acrylate, methacrylate, polyvinyl cinnamate, or cyclized rubber. Is used. Usually, an electron beam curable resin or an ultraviolet curable resin is used.
When an ultraviolet curable resin is used, a photopolymerization initiator is used alone or in combination with a binder resin. When an ultraviolet curable resin is used, a sensitizer, a coating property improver, a development improver, a crosslinking agent, a polymerization inhibitor, a plasticizer, a flame retardant, etc. may be used as necessary.

  As a method for forming a colored layer, for example, a coloring agent is mixed, dispersed or solubilized in a binder resin to prepare a colored layer forming coating solution, and a photolithography method using the colored layer forming coating solution. A method of patterning by a method of patterning by an ink jet method using a coating solution for forming a colored layer is used.

  The thickness of the colored layer used in the present invention can be the same as the thickness of the colored layer used in a general color filter.

(3) Fifth Aspect In this aspect, the toning layer refers to a layer composed of a colored layer and a color conversion layer formed on the colored layer.

  FIG. 5 is a schematic cross-sectional view showing an example of the color filter for an organic EL display device according to this embodiment. As shown in FIG. 5, a color filter 10 for an organic EL display device includes a transparent substrate 1 and a colored layer 2 formed on the transparent substrate 1 (in FIG. 5, a red colored layer 2R, a green colored layer 2G, and a blue color). A colored layer 2B) and a color conversion layer 2 ′ formed on the colored layer 2 of each color (in FIG. 5, a red color conversion layer 2′R, a green color conversion layer 2′G, and a blue color conversion layer 2 ′) B), an adhesive layer 3 formed on the color conversion layer 2 ′, and an inorganic transparent substrate 4 for preventing color mixing and having a gas barrier property and a color mixing preventing function formed on the adhesive layer 3. . In this embodiment, the light shielding part 5 may be formed between the colored layers 2.

  According to this aspect, since the toning layer is composed of the colored layer and the color conversion layer formed on the colored layer, the hue of light from the light emitting layer of the organic EL display device can be corrected. A color filter for an organic EL display device having an excellent balance of the three primary colors can be obtained.

(I) Colored layer The colored layer used in this embodiment is the same as that described in the above-mentioned section “(1) Fourth embodiment”, and therefore, description thereof is omitted here.

(Ii) Color Conversion Layer The color conversion layer used in the present embodiment is provided corresponding to the colored layer, and usually three types of color conversion, a red color conversion layer, a green color conversion layer, and a blue color conversion layer. It has a layer. In this aspect, all of the three types of color conversion layers may be formed on the colored layer, and one or two of the three types of color conversion layers are formed on the colored layer. Also good.

  Moreover, the structure of the color conversion layer used for this aspect changes with structures of the light emitting layer of the organic EL display device to which the color filter for organic EL elements of the present invention is applied.

  When the color filter substrate for organic EL elements of the present invention is used for an organic EL display device having a blue light emitting layer that emits blue light, for example, the incident light to the color conversion layer generally contains a component of blue light, or blue light and In many cases, it contains a green light component.

  When the incident light to the color conversion layer includes a blue light component, the color conversion layer includes a red color conversion layer that converts incident light into red light and a green color conversion layer that converts incident light into green light. It should be at least.

In this case, since the incident light to the color conversion layer contains a component of blue light, the blue color conversion layer does not need to perform color conversion in principle, so even if the blue color conversion layer is not formed. Good. Therefore, nothing may be formed on the blue colored layer, but in order to flatten the surface of the color filter substrate for the organic EL element, a transmission having the same thickness as the red color conversion layer and the green color conversion layer. It may have a layer.
This transmissive layer transmits incident light, and when formed on the blue colored layer, it is not particularly limited as long as it transmits blue light, and does not include, for example, a color conversion phosphor. It can be made of a resin described later.

  On the other hand, when the incident light to the color conversion layer includes components of blue light and green light, the color conversion layer may have at least a red color conversion layer that converts the incident light into red light. In this case, the red color conversion layer is partially formed on the red colored layer.

In this case, since the incident light to the color conversion layer includes components of blue light and green light, the blue color conversion layer and the green color conversion layer do not need to perform color conversion in principle. The layer and the green color conversion layer may not be formed. Therefore, nothing may be formed on the blue colored layer and the green colored layer, but in order to flatten the surface of the color filter substrate for the organic EL element, a transmission having a thickness comparable to that of the red color conversion layer. A layer may be formed.
This transmissive layer transmits incident light, and transmits blue light when formed on the blue colored layer, and transmits green light when formed on the green colored layer. The material is not particularly limited as long as it is, for example, it does not include a color conversion phosphor and can be made of a resin described later.

  Furthermore, when the color filter substrate for organic EL elements of the present invention is used for an organic EL display device having a white light emitting layer that emits white light, for example, the incident light to the color conversion layer generally contains components of red light and blue light. There are many. Therefore, the color conversion layer should just have at least the green color conversion layer which converts incident light into green light.

  In this case, since the incident light to the color conversion layer includes components of red light and blue light, the red color conversion layer and the blue color conversion layer do not need to perform color conversion in principle. The layer and the blue color conversion layer may not be formed. In this case, nothing may be formed on the red colored layer and the blue colored layer, but a transmissive layer having a thickness similar to that of the green color conversion layer may be formed.

  In the above description, the configuration of the color conversion layer corresponding to the type of light emitting light source of the light emitting layer in the organic EL display device to which the color filter substrate for organic EL elements of the present invention is applied has been described. The configuration of the conversion layer is not particularly limited depending on the type of light emitting light source of the light emitting layer, as long as the color conversion layer can perform desired hue correction.

  The material used for the color conversion layer is a material in which a color conversion phosphor that absorbs incident light and emits fluorescence of each color is dispersed or dissolved in a resin, and all three colors are ordinary color filters for organic EL display devices. Since the material is the same as that of the color conversion layer used in the above, description thereof is omitted here.

In the color conversion layer, a transmission layer may be formed when the color conversion layer is not formed.
When the transmissive layer is formed, the transmissive layer transmits red light when formed on the red colored layer, and transmits green light when formed on the green colored layer. If it is formed on a blue colored layer, it is not particularly limited as long as it transmits blue light. For example, it does not include a color conversion phosphor and is made of a commonly used resin. be able to.

  The thickness of the color conversion layer is preferably about 0.5 μm to 30 μm, more preferably 5 μm to 20 μm, and still more preferably 8 μm to 15 μm. This is because if the thickness of the color conversion layer is too thick, the level difference (unevenness) due to the configuration of the color conversion layer increases, and it becomes difficult to flatten the surface. Conversely, if the thickness of the color conversion layer is too thin, the color conversion efficiency may be reduced. Similarly to the above, concentration quenching may occur when the content of the organic phosphor in the color conversion layer is increased in order to reduce the thickness of the color conversion layer.

As a method for forming the color conversion layer, for example, each color conversion phosphor and resin are mixed with a solvent, a diluent or an appropriate additive as necessary to prepare a coating liquid for forming each color conversion layer. A method of patterning by a photolithography method using a conversion layer forming coating solution, or a method of patterning by a printing method using each of the above color conversion layer forming coating solutions is used.
The colored layer and the color conversion layer may be laminated in the reverse order of that shown in FIG.

(3) Sixth aspect In this aspect, the toning layer refers to a color conversion layer.

  FIG. 6 is a schematic cross-sectional view showing an example of the color filter for an organic EL display device according to this embodiment. The color filter 10 for an organic EL display device according to this embodiment includes a transparent substrate 1 and a color conversion layer 2 ′ formed on the transparent substrate (a red color conversion layer 2′R and a green color conversion layer 2 ′ in FIG. 5). G and the blue color conversion layer 2′B), the adhesive layer 3 formed on the color conversion layer 2 ′, and the inorganic transparent for color mixing prevention having gas barrier properties and color mixing prevention formed on the adhesive layer 3 And a substrate 4. In this embodiment, the light shielding part 5 may be provided between the color conversion layers 2 ′.

  The color conversion layer used in the present embodiment is not particularly limited depending on the type of light emitting light source of the light emitting layer, and is not particularly limited as long as the color conversion layer can perform a desired hue correction. The color conversion layer is preferably a color conversion layer having a red color conversion layer that changes blue light into red and a green color conversion layer that converts blue light into green. This is because the light incident on the color conversion layer generally contains a blue light component or often contains blue light and green light components. Since the light from the light emitting layer is blue light, it is not necessary to form a blue color conversion layer, but in order to flatten the color conversion layer, the transmission has a thickness equivalent to that of the red color conversion layer and the green color conversion layer. A layer may be formed.

  The red color conversion layer, the green color conversion layer, and the transmission layer can be the same as those described in the above-mentioned section “(5) Fifth Aspect”, and thus description thereof is omitted here.

(4) Others In the present invention, the toning layer is preferably a colored layer. This is because by adjusting the pigment contained in the colored layer, it is possible to adjust the color of the color filter for the organic EL display device to a favorable one.

3. Adhesive Layer The adhesive layer used in the present invention is formed on the above-mentioned color-adjusting layer, and is formed to adhere the above-described inorganic transparent substrate for preventing color mixture.

The adhesive used for the adhesive layer is not particularly limited as long as it is transparent, has adhesive strength, and has curability. Examples of such an adhesive include a thermosetting adhesive or a photocurable adhesive, and a solvent-free type is usually used. Further, a film-like adhesive sheet may be used.
Specifically, synthetic rubber-based, acrylic-based, epoxy-based, polyimide-based adhesives, and adhesive sheets may be mentioned.

The adhesive used in the present invention is more preferably an adhesive in which the refractive index of the adhesive layer is larger than the refractive index of the above-described inorganic transparent substrate for preventing color mixing. Since the light emitted from the light emitting layer of the organic EL display device passes through the inorganic transparent substrate for preventing color mixture and enters the adhesive layer, the angle with respect to the vertical direction of the surface of the transparent substrate becomes smaller. It is because it can be made higher.
Moreover, as an adhesive agent used for this invention, the adhesive agent from which the refractive index of the transparent substrate mentioned later becomes larger than the refractive index of the said adhesive bond layer is further more preferable. Since the light emitted from the light emitting layer of the organic EL display device passes through the adhesive layer and enters the transparent substrate, the angle with respect to the vertical direction of the surface of the transparent substrate becomes smaller, so that the color mixing prevention function is made higher. Because you can.

The film thickness of the adhesive layer is preferably in the range of 1 μm to 50 μm, especially in the range of 2 μm to 30 μm, particularly in the range of 3 μm to 10 μm when the adhesive layer is made of an adhesive. .
Moreover, when the said adhesive bond layer consists of a film-like adhesive sheet, as a film thickness of a film-like adhesive sheet, it exists in the range of 10 micrometers-200 micrometers, especially the range of 15 micrometers-150 micrometers, especially the range of 30 micrometers-100 micrometers. It is preferable to be within. In the case of an adhesive, the thickness of the layer can be adhered within the above range. The adhesive sheet can be bonded within the above range. The above range should be as thin as possible, but technically, within this range, adhesion with excellent adhesion and transparency can be achieved. Therefore, a method using an adhesive is desirable.

4). Transparent substrate The material of the transparent substrate used in the present application is not particularly limited as long as it has transparency and can be used for a color filter, and may be a transparent inorganic substrate or a transparent substrate. It may be a resin substrate.
Examples of such materials include non-flexible transparent inorganic substrates such as quartz glass, Pyrex (registered trademark) glass, and synthetic quartz plates, and flexibility such as transparent resin films and optical resin plates. Examples thereof include a transparent resin substrate. Among them, it is preferable to use a transparent inorganic substrate in the present invention, and it is particularly preferable to use a glass substrate. Furthermore, it is preferable to use an alkali-free type glass substrate among the glass substrates. This is because the alkali-free glass substrate is excellent in dimensional stability and workability in high-temperature heat treatment.

5. Other Members In the present invention, necessary members can be appropriately added in addition to the above-described inorganic transparent substrate for preventing color mixing, the toning layer, the adhesive layer, and the transparent substrate. An example of such a member is a light-shielding portion that partitions pixels. The light-shielding portion can be the same as that used for a general color filter, and therefore description thereof is omitted here.

6). Use The color filter for organic EL display devices of the present invention is used when forming an organic EL display device.

B. Method for Producing Color Filter for Organic EL Display Device Next, a method for producing a color filter for an organic EL display device of the present invention will be described.
The method for producing a color filter for an organic EL display device according to the present invention includes a toning layer forming step of forming a toning layer on a transparent substrate, an adhesive layer on the toning layer, and an inorganic transparent for preventing color mixing. It is a manufacturing method which has the inorganic transparent board | substrate adhesion process for color mixing prevention which bonds a board | substrate together, and the inorganic transparent board | substrate thin film formation process for color mixing prevention which makes the said inorganic transparent board for color mixing prevention thin.

The manufacturing method of the color filter for organic EL display devices of this invention is demonstrated using figures.
FIG. 7 is a process diagram showing an example of a method for producing a color filter for an organic EL display device of the present invention. Here, in FIG. 7, it is assumed that the toning layer is a colored layer. The method for producing a color filter for an organic EL display device according to the present invention includes, for example, a plurality of colored layers 2 (in the drawing, a red colored layer 2R, a green colored layer 2G, and a blue colored layer 2B on a transparent substrate 1 having a light shielding portion 5). (FIG. 7 (a)) and the toned layer forming step, the adhesive layer 3 is formed on the colored layer 2 (FIG. 7 (b)), and the inorganic transparent substrate 4 for preventing color mixture is bonded ( FIG. 7C is a manufacturing method including an inorganic transparent substrate adhesion process for preventing color mixing and an inorganic transparent substrate 4 for preventing color mixing (FIG. 7D).

According to the present invention, since the inorganic transparent substrate for preventing color mixture is bonded to a toning layer with an adhesive layer to form a thin film to give a gas barrier property to a color filter for an organic EL display device, it has been conventionally performed. Compared with the method of forming a layer having gas barrier properties by sputtering the inorganic transparent material directly on the toning layer, the cost can be reduced.
Further, in the present invention, since there are no pinhole defects or defects such as cracks as compared with a conventional layer having gas barrier properties, the gas barrier properties can be improved.
Furthermore, according to the present invention, the color filter for organic EL display device manufactured by the method for manufacturing the color filter for organic EL display device of the present invention is obtained by thinning the inorganic transparent substrate for preventing color mixing to a desired thickness. When used as an organic EL display device, a function for preventing color mixture of light from the light emitting layer of the organic EL display device can be imparted to the inorganic transparent substrate for color mixture prevention.
Hereinafter, each step will be described.

1. Toning layer formation process This process is a process of forming a toning layer on a transparent substrate.
The transparent substrate used in this step, the material of the toning layer, the formation method, and the like can be the same as those described in the section “A. Color filter for organic EL display device”, so description is omitted here. .

2. Inorganic transparent substrate adhesion step for color mixing prevention This step is a step of forming an adhesive layer on the toning layer and bonding the inorganic transparent substrate for color mixing prevention.

  Since the material of the inorganic transparent substrate for preventing color mixture used in this step and the adhesive can be the same as those described in the section “A. Color filter for organic EL display device”, the description here is as follows. Omitted.

In this step, an adhesive is applied onto the toning layer, and the inorganic transparent substrate for preventing color mixing is bonded, and then the adhesive is cured by light or heat.
In this step, the method for applying the adhesive on the toning layer is not particularly limited as long as the adhesive can be applied uniformly.
In addition, the method for bonding the adhesive layer and the inorganic transparent substrate for preventing color mixing is particularly limited as long as the adhesive layer and the inorganic transparent substrate for preventing color mixing can be bonded without introducing bubbles or the like. Although it is not a thing, it is preferable to bond together under vacuum especially. This is because air bubbles can be prevented from being generated when air enters between the adhesive layer and the inorganic mixture substrate for preventing color mixing when the inorganic transparent substrate for preventing color mixture and the adhesive layer are bonded together.

The thickness of the inorganic transparent substrate for preventing color mixture before the thinning treatment used in this step is preferably in the range of 0.1 mm to 0.7 mm, and more preferably in the range of 0.4 mm to 0.7 mm.
This is because if it is less than the above range, cracking may occur at the time of transporting the glass or adhering to the colored layer, making handling difficult. In addition, the cost increases. If the above range is exceeded, it takes time to perform the thinning process in the inorganic transparent substrate thinning process for preventing color mixture described later, and the cost increases.
Within the above range, considering the later steps, it is better that the inorganic transparent substrate for preventing color mixing before the thinning treatment is thinner. This is because the cost can be suppressed by reducing the polishing amount.
In addition, when used for large color filters for organic EL display devices (370 × 470 mm, 550 × 650 mm, etc.), a thickness of about 0.4 mm is available at a low cost as an inorganic transparent substrate for preventing color mixing. It is preferable because it is easy.

3. Inorganic transparent substrate thinning step for preventing color mixing This step is a step for reducing the thickness of the inorganic transparent substrate for preventing color mixing.

The thinning treatment method used in this step is not particularly limited as long as it is a method capable of uniformly thinning the inorganic transparent substrate for preventing color mixing to a desired thickness, and is a mechanical polishing method using a machine or etching. For example, a chemical thin film forming method may be used.
In this step, the produced color filter for an organic EL display device is an organic EL display device in which a transparent electrode layer 24 is formed on an inorganic transparent substrate 4 for preventing color mixing, for example, as shown in FIG. When used, it is preferable to use a mechanical polishing method. This is because when the thinning treatment is performed by the mechanical polishing method, the surface of the inorganic transparent substrate for preventing color mixing is excellent in smoothness.
Further, the manufactured color filter for the organic EL display device includes, for example, as shown in FIG. 8, an inorganic transparent substrate 4 for preventing color mixture of the color filter 10 for the organic EL display device, and an organic EL element of the organic EL element side substrate 20. In the case of being used for an organic EL display device in which the surface on which the surface 25 is formed is sealed facing the surface, a method by etching is preferable. This is because the etching can easily perform the thinning process, and the cost can be reduced.
The detailed thinning treatment method has been described in the section “A. Color filter for organic EL display device”, and therefore description thereof is omitted here.
8 and FIG. 11 will be described in detail in the section of “C. Organic EL display device” to be described later, so description thereof is omitted here.

Moreover, in this process, as shown in FIG. 3, the recessed part formation process which forms the recessed part 6 for inserting a desiccant in the inorganic transparent board | substrate for color-mixing prevention, or the inorganic transparent for color-mixing prevention shown in FIG. You may perform simultaneously the columnar spacer formation process which forms the columnar spacer 7 integrally on a board | substrate.
Also in the above case, it is preferable to use a chemical thinning method such as etching.

  The thickness of the inorganic transparent substrate for preventing color mixing after this step can be the same as that described in the section of the inorganic transparent substrate for preventing color mixing in “A. Color filter for organic EL display device”. Description is omitted.

4). Other Steps The method for producing a color filter for an organic EL display device according to the present invention comprises at least the above-described toning layer forming step, an inorganic transparent substrate adhesion step for preventing color mixing, and an inorganic transparent substrate thinning step for preventing color mixing. If it is, it will not specifically limit, A required process can be added suitably.
For example, when the organic EL display device is formed on the surface of the adhesive layer of the inorganic transparent substrate for preventing color mixing, the light emitted from the light emitting layer of the organic EL display device is formed by forming a light shielding portion on the transparent substrate. An inorganic transparent substrate for forming a color mixture for forming unevenness for reducing an angle with respect to the vertical direction of the surface of the transparent substrate when passing through the inorganic transparent substrate for preventing color mixing, an inorganic transparent substrate for preventing color mixing, A recess forming step of forming a recess in the column, a columnar spacer forming step of forming the columnar spacer integrally with the color-preventing inorganic transparent substrate, and the like.

C. Organic EL Display Device Next, the organic EL display device of the present invention will be described.
The organic EL display device of the present invention includes a transparent substrate, a toning layer formed on the transparent substrate, an adhesive layer formed on the toning layer, and a gas barrier disposed on the adhesive layer. A color filter for an organic EL display device having an inorganic transparent substrate for preventing color mixing, and an organic EL element formed on the inorganic transparent substrate for preventing color mixing of the color filter substrate for organic EL element It is what.
In the present invention, there are two modes depending on the configuration of the organic EL display device. Hereinafter, it demonstrates as a 1st embodiment and a 2nd embodiment, respectively.

I. First Embodiment An organic EL display device according to this embodiment includes a transparent substrate, a toning layer formed on the transparent substrate, an adhesive layer formed on the toning layer, and the adhesive. A color filter for an organic EL display device having an inorganic transparent substrate for preventing color mixing and having a gas barrier property disposed on the layer, an organic EL element side substrate having an organic EL element formed on the substrate, and the organic EL display And a sealing agent that seals the organic EL element, and is formed on a peripheral portion of the color filter for the device and the organic EL element side substrate, on the inorganic transparent substrate for preventing color mixture of the color filter for the organic EL display device The organic EL elements are arranged so that the sides on which the organic EL elements are formed face each other.

FIG. 8 is a schematic cross-sectional view showing an example of the organic EL display device of this embodiment. In FIG. 8, it is assumed that the toning layer is a colored layer.
As shown in FIG. 8, the organic EL display device 30 of this embodiment includes a substrate 21, an organic EL element side substrate 20 having an organic EL element 25 formed on the substrate 21, a transparent substrate 1, and the transparent substrate 1. On the light-shielding part 5 formed above, the colored layer 2 of a plurality of colors formed in the opening of the light-shielding part 5 (in the figure, the red colored layer 2R, the green colored layer 2G, the blue colored layer 2B), on the colored layer 2 A surface of the organic EL element side substrate 20 on which the organic EL element 25 is formed, the adhesive layer 3 formed, and the inorganic transparent substrate 4 for preventing color mixture disposed on the adhesive layer 3 and having gas barrier properties; The organic EL display device color filter 10 disposed so as to face the surface on which the color-mixing preventing inorganic transparent substrate 4 is formed, and the periphery of the organic EL display device color filter 10 and the organic EL element side substrate 20 Formed in the part, The serial organic EL element 25 is one having a sealant 27 for sealing.
In FIG. 8, the organic EL element includes a back electrode layer 22, an organic EL layer 23, and a transparent electrode layer 24, and the organic EL element side substrate 20 is an opening of the back electrode layer 22. It has the insulating layer 26 formed in the part.

According to this embodiment, since the organic EL layer can be protected from the desorbed gas generated from the toning layer by having the above-mentioned inorganic transparent substrate for preventing color mixing, a highly durable organic EL display device is obtained. be able to. In addition, since the inorganic transparent substrate for preventing color mixture has a function of preventing color mixture of light from the organic EL layer, it is possible to prevent color mixing of each color and to obtain a high-efficiency and high-quality organic EL display device.
Each configuration will be described below.

1. Color filter for organic EL display device The color filter for organic EL display device used in the present embodiment can be the same as that described in the section of “A. Color filter for organic EL display device”. The description in is omitted.

2. Organic EL element side substrate The organic EL element side substrate used in this embodiment has at least a substrate and an organic EL element, and usually has an insulating layer.

(1) Substrate The substrate used in the present embodiment may be any substrate that can support an organic EL element and the like to be described later, and those generally used for organic EL display devices can be used.
In the present embodiment, since light is extracted from the color filter side for the organic EL display device, the substrate may be transparent or opaque.

(2) Organic EL element The organic EL element in this embodiment includes a back electrode layer and a transparent electrode layer, and an organic EL layer sandwiched between the two electrode layers and including at least a light emitting layer.

(I) Organic EL layer The organic EL layer used in this embodiment is composed of one or more organic layers including at least a light emitting layer, and usually has a charge such as a hole injection layer or an electron injection layer. It may have a charge transport layer such as an injection layer, a hole transport layer that transports holes to the light-emitting layer, and an electron transport layer that transports electrons to the light-emitting layer.

(Ii) Transparent electrode layer and back electrode layer The transparent electrode layer in the present embodiment applies voltage to the organic EL layer sandwiched between the transparent electrode layer and the back electrode layer, and causes the light emitting layer to emit light. It is provided. Further, the light generated in the light emitting layer is transmitted to the color filter side for the organic EL display device. Therefore, it is disposed between the organic EL layer and the color filter for an organic EL display device.
Moreover, the back electrode layer in this embodiment is disposed between the organic EL layer and the substrate. The back electrode layer forms the other electrode for causing the organic EL layer to emit light, and is an electrode to which a charge opposite to that of the transparent electrode layer is applied.

  As such a transparent electrode layer and a back electrode layer, any material can be used as long as it can cause the light emitting layer to emit desired light, and those generally used for organic EL display devices can be used.

3. Insulating layer The insulating layer in this embodiment is formed in order to prevent direct contact between the transparent electrode layer and the back electrode layer.

  As such an insulating layer, what is generally used for an organic EL display device can be used, and thus description thereof is omitted here.

4). Sealant The sealant used in the present embodiment is formed on the peripheral edge of the color filter and the organic EL element side substrate, and seals the organic EL element.

  As a constituent material of such a sealing agent, any material that can prevent the organic EL element from coming into contact with moisture in the atmosphere or the like may be used. Can be used.

5. Organic EL Display Device The organic EL display device used in the present embodiment has at least the color filter for organic EL display device, the organic EL element side substrate, and a sealant, but has other configurations as necessary. You may have.
Further, as shown in FIG. 9, a desiccant 41 may be inserted between the organic EL display element side substrate 20 and the organic EL display device color filter 10. Here, the desiccant used is not particularly limited as long as it can be dried even when moisture in the air enters, and those generally used in organic EL display devices can be used.
As shown in FIG. 10, a columnar spacer 7 may be provided between the organic EL display element side substrate 20 and the color filter 10 for the organic EL display device.
9 and 10 which are not explained here are the same as those shown in FIG. 8, so the explanation here is omitted.

  As a driving method of the organic EL display device of this embodiment, it can be driven by either an active matrix method or a passive matrix method.

II. Second Embodiment An organic EL display device according to this embodiment includes a transparent substrate, a toning layer formed on the transparent substrate, an adhesive layer formed on the toning layer, and the adhesive. Color filter for organic EL display device having inorganic transparent substrate for preventing color mixture disposed on layer, and transparent electrode formed on inorganic transparent substrate for preventing color mixture of color filter substrate for organic EL element An organic EL display device having a layer, an organic EL layer formed on the transparent electrode layer, and a counter electrode layer formed on the organic EL layer.

FIG. 11 is a schematic cross-sectional view showing an example of the organic EL display device of this embodiment. Here, in FIG. 11, it is assumed that the toning layer is a colored layer.
As shown in FIG. 11, the organic EL display device 30 according to this embodiment includes a transparent substrate 1, a light shielding portion 5 formed on the transparent substrate 1, and a plurality of colored layers 2 ( In the drawing, the red colored layer 2R, the green colored layer 2G, and the blue colored layer 2B), the adhesive layer 3 formed on the colored layer 2, and the inorganic transparent for preventing color mixture disposed on the adhesive layer 3 and having gas barrier properties The transparent electrode layer 24, the organic EL layer 23, and the counter electrode layer 28 are formed on the color filter 10 for the organic EL display device having the substrate 4 and the inorganic transparent substrate 4 for preventing color mixture of the color filter 10 for the organic EL display device. Insulating layer 26 is formed between transparent electrode layers 24 on inorganic transparent substrate 4 for preventing color mixing, and partition wall 15 is formed thereon.

According to this embodiment, since the organic EL layer can be protected from the desorbed gas generated from the toning layer by having the above-mentioned inorganic transparent substrate for preventing color mixing, a highly durable organic EL display device is obtained. be able to. In addition, since the inorganic transparent substrate for preventing color mixture has a function of preventing color mixture of light from the organic EL layer, it is possible to prevent color mixing of each color and to obtain a high-efficiency and high-quality organic EL display device.
Each configuration will be described below.

1. Color filter for organic EL display device The color filter for organic EL display device used in the present embodiment can be the same as that described in the section of “A. Color filter for organic EL display device”. The description in is omitted.

2. Organic EL Layer The organic EL layer used in the present embodiment is the same as that described in the above-mentioned section “I. First Embodiment”, and thus the description thereof is omitted here.

3. Transparent electrode layer and counter electrode layer The transparent electrode layer in the present embodiment is provided to apply voltage to the organic EL layer sandwiched between the transparent electrode layer and the counter electrode layer to cause the light emitting layer to emit light. It is. Further, the light generated in the light emitting layer is transmitted to the color filter side for the organic EL display device. Therefore, it is disposed between the organic EL layer and the color filter for an organic EL display device.
The counter electrode layer in the present invention is disposed on the organic EL layer. The back electrode layer forms the other electrode for causing the organic EL layer to emit light, and is an electrode to which a charge opposite to that of the transparent electrode layer is applied.

  As such a transparent electrode layer and a counter electrode layer, any material can be used as long as it can cause the light emitting layer to emit desired light, and those commonly used in organic EL display devices can be used.

4). Organic EL Display Device The organic EL display device of this embodiment is particularly limited as long as it has the above-described color filter for organic EL display devices, a transparent electrode layer, an organic EL layer, and a counter electrode layer. Instead, necessary members can be added as appropriate. Such members include an insulating layer and a partition wall. Each will be described below.

(1) Insulating layer The insulating layer used for this embodiment is arrange | positioned between the transparent electrode layers formed in stripe form.
The insulating layer is the same as that described in the section “I. First embodiment” described above, and thus the description thereof is omitted here.

(2) Partition Wall The partition wall used in the present embodiment is formed on the insulating layer and serves as a mask when forming the light emitting layer and the like. As a material for forming the partition wall, for example, a photocurable resin such as a photosensitive polyimide resin or an acrylic resin, a thermosetting resin, or an inorganic transparent material can be used. In this case, you may perform the process which changes the surface energy (wetting property) of a partition part.

5. Others As a driving method of the organic EL display device of this embodiment, it can be driven by a passive matrix method.

III. Applications The organic EL display device of the present invention can be used for portable information terminals and the like.

  The present invention is not limited to the above embodiment. The above-described embodiment is an exemplification, and the present invention has substantially the same configuration as the technical idea described in the claims of the present invention, and any device that exhibits the same function and effect is the present invention. It is included in the technical scope of the invention.

[Example]
OA10 (Nippon Electric Glass Co., Ltd. 370 * 470mm0.7t) was used as glass which forms a color filter. After forming the color filter, the adhesive layer was applied with a thickness of 5 μm, and then the inorganic transparent glass OA10 (Nippon Electric Glass Co., Ltd. 100 × 100 mm 0.7 t) was bonded and adhered by a vacuum bonding machine. Thereafter, as a post-process, the entire glass adhered on the color filter was processed to a thickness of 50 μm by etching to obtain a color filter having a target inorganic transparent substrate for preventing color mixing. An organic EL element was formed on the substrate, and sealing was performed to obtain a light-emitting panel (this panel is referred to as sample A).

[Comparative example]
A color filter was produced under the same conditions using the same material as in the example, then an overcoat was laminated, and a 2000 nm SiON film was formed as a barrier film to obtain a color filter with a barrier film. Thereafter, an organic EL element was formed and sealed to produce a light-emitting panel (the above is referred to as Sample B).

[Evaluation]
The incidence of dark spots on the light-emitting panel was investigated and compared.
Sample A: No dark spots occurred immediately after production and after 200 hours.
Sample B: 15 dark spots of 20 μm or more immediately after fabrication, the dark spots expanded after 200 hours, and the number of occurrences increased to 30.

From the above, the barrier can be achieved by etching a complete film after glass bonding.
Appearance was also evaluated as an evaluation of light leakage. In Sample A, no color mixing due to light leakage during light emission was observed.

DESCRIPTION OF SYMBOLS 1 ... Transparent substrate 2 ... Colored layer 2 '... Color conversion layer 3 ... Adhesive layer 4 ... Inorganic transparent substrate for color-mixing prevention 4' ... Inorganic transparent substrate 5 ... Light-shielding part 6 ... Recessed part 7 ... Columnar spacer 8 ... Unevenness 10 ... Organic Color filter for EL display device 20 ... Organic EL element side substrate 21 ... Substrate 22 ... Back electrode layer 23 ... Organic EL layer 24 ... Transparent electrode layer 25 ... Organic EL element 26 ... Insulating layer 27 ... Sealing material 28 ... Counter substrate

Claims (2)

An inorganic transparent substrate for color mixing prevention having a transparent substrate, a toning layer formed on the transparent substrate, an adhesive layer formed on the toning layer, and a gas barrier property disposed on the adhesive layer When the organic electroluminescence display device is formed using the refractive index of the inorganic transparent substrate for preventing color mixing, the refractive index of the adhesive layer, and the color filter for the organic electroluminescence display device, The relationship between the refractive index of the contact layer, which is a solid layer in contact with the inorganic transparent substrate for preventing color mixing, on the surface opposite to the agent layer side is the refractive index of the adhesive layer ≧ the refractive index of the inorganic transparent substrate for preventing color mixing ≧ A color filter for organic electroluminescence display device, wherein the inorganic transparent substrate for preventing color mixture and the adhesive layer are selected so as to have a refractive index of the contact layer;
An organic electroluminescent element formed on an inorganic transparent substrate for preventing color mixing of the color filter substrate for the organic electroluminescent element;
An organic electroluminescence display device comprising:   When the organic electroluminescence display device is formed using the color filter for organic electroluminescence display device on the surface of the inorganic transparent substrate for preventing color mixture, the light emitted from the light emitting layer of the organic electroluminescence display device is 2. The organic electroluminescence display device according to claim 1, wherein unevenness is formed so that an angle with respect to a vertical direction of the surface of the transparent substrate becomes small when transmitted through the inorganic transparent substrate for preventing color mixture.

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