JP6098234B2 - Organic electroluminescence display device - Google Patents

Description

  The present invention relates to an organic electroluminescence display device that prevents occurrence of luminance unevenness and good productivity, and a 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.

  Organic EL display devices have been put to practical use mainly for small screens of about several inches such as in-vehicle navigation, mobile phones, digital cameras, etc., but recently, large screens of, for example, 20 inches or more as represented by flat-screen televisions. Development of computerization has been demanded.

  However, when the organic EL display device has a large screen of, for example, 20 inches or more, the wiring length for supplying drive current to each pixel is extremely different between the outer peripheral portion and the central portion of the screen. For this reason, in the central portion of the screen, the degree of voltage drop is larger than that of the outer peripheral portion of the screen, resulting in inconvenience that luminance unevenness occurs. This tendency becomes more prominent as the screen becomes larger. In particular, the wiring for supplying the drive current is conducted through a transparent electrode layer such as ITO formed on the organic EL layer including the light emitting layer, and this ITO has a larger resistance than, for example, metal Cu, and therefore ITO. The effect of voltage drop is great.

  In addition, there are a passive matrix method and an active matrix method as a driving method of the organic EL display device, but the former has a problem that it is difficult to realize a large-sized and high-definition display device although the structure is simple. In order to increase the size, the latter active matrix system has been actively developed. In the active matrix system, a current flowing in an organic EL element arranged for each pixel is controlled by a TFT (Thin Film Transistor) in a drive circuit provided for each organic EL element.

Japanese Patent No. 4489472 Japanese Patent No. 4367346 JP 2009-26828 A JP 2011-96682 A

  In Patent Document 1, even if the size is increased, it is positioned on the element isolation bank formed on the first substrate for the purpose of preventing unevenness in light emission luminance due to a voltage drop caused by the upper transparent electrode layer. The first substrate and the second substrate are arranged to face each other so that the upper electrode layer and the conductive light-shielding pattern formed on the second substrate are electrically connected, and at least the upper electrode layer or the conductive layer is disposed. An organic EL display device in which a light shielding pattern is connected to a feeding point has been disclosed.

  However, in Patent Document 1, an element isolation bank, which is a columnar protrusion, is formed on the first substrate side on which a TFT or an organic EL layer is formed. Since the TFT and the organic EL layer are formed, the first substrate side has a complicated configuration, and the provision of the element isolation bank on this is compared with the process provided on the opposite second substrate side. Thus, it can be said that the probability that the yield decreases is extremely high. Further, the yield reduction on the first substrate side is extremely complicated because it is formed through a complicated process, and the process of forming the TFT and the organic EL layer having a large number of processes is wasted. . An organic EL element including an organic EL layer sandwiched between a pair of electrode layers is usually covered and protected by a sealing layer for protecting the organic EL element. It is necessary to technically consider how to establish conduction with the coated electrode layer in consideration of its existence.

  Further, Patent Document 2 discloses a high-output-quality organic EL that enables further reduction in resistance of the power supply wiring and the second electrode layer, reduces unevenness in display brightness, and achieves higher brightness and higher contrast. Although an electro-optical device such as a device has been proposed, the same problem as in Patent Document 1 can also occur in this proposal.

  Patent Document 3 proposes a top emission type organic EL display device developed for the purpose of enhancing the in-plane uniformity of the potential of the counter electrode layer. The same problem as in Patent Document 1 may occur.

  In Patent Document 4, since the effective resistance value of the transparent electrode layer can be lowered and a uniform voltage can be applied to the organic EL layer, display defects such as display unevenness can be prevented. Although the proposal of the light-emitting device which can do is made | formed, the problem similar to the said patent document 1 may arise also in the said proposal.

  The present invention has been made in view of the above circumstances, and mainly provides an organic EL display device which can prevent luminance unevenness and has good productivity, and a color filter for the organic EL display device used therefor. Objective.

  In order to solve the above problems, the present invention provides a transparent substrate, a low reflection layer formed on the transparent substrate and having an opening, a colored layer formed in the opening of the low reflection layer on the transparent substrate, And a color filter comprising a metal electrode layer formed on the low reflection layer, and an auxiliary electrode layer having a connection electrode layer formed on the colored layer and electrically connected to the metal electrode layer, a substrate, and A bottom electrode layer formed on the substrate, an organic EL layer formed on the bottom electrode layer and including a light emitting layer, and an organic EL element having a top transparent electrode layer formed on the organic EL layer. An organic EL element side substrate, and is arranged so that the colored layer side surface of the color filter and the organic EL element side surface of the organic EL element side substrate face each other, and the connection electrode layer and the upper surface Transparent An organic EL display device, wherein a and the layer in contact to conduct.

According to the present invention, since the connection electrode layer is formed on the colored layer having the auxiliary electrode layer and the connection electrode layer having a relatively large area, it is possible to suitably prevent luminance unevenness. An EL display device can be obtained.
In addition, according to the present invention, the connection electrode layer is formed on the colored layer and is in contact with the upper transparent electrode layer so that the connection electrode layer such as a column and the upper transparent electrode layer are in contact with each other. Therefore, the number of manufacturing steps of the organic EL display device can be reduced, and an organic EL display device with good productivity can be obtained.

  In the above invention, the colored layer has a plurality of colored layers including a white colored layer, and is composed of a thick colored layer and a thin colored layer, and the thick colored layer is the white colored layer. It is a laminate of a colored layer and another colored layer of one color, and it is preferable that the connection electrode layer formed on the thick colored layer is in contact with the upper transparent electrode layer. . In the organic EL display device, a space can be provided between the colored layer of the thin film and the organic EL element, and foreign matter can be included in the space. Therefore, the contact surface of the connection electrode layer and the upper transparent electrode layer has foreign matter. This is because it is possible to suppress contamination of the organic EL element and to prevent deterioration of the organic EL element. Further, when the thick colored layer is the above-described laminate, a desired thick colored layer can be formed by a simple method.

  In the above invention, the connection electrode layer is formed on the colored layer overlapping the low reflection layer in a plan view, and has an opening for the connection electrode layer overlapping the opening of the low reflection layer in a plan view. It may be. Since a metal material having no transparency can be used as the connection electrode layer, the connection electrode layer and the metal electrode layer can be formed integrally, so that the number of manufacturing steps of the organic EL display device is reduced. This is because an organic EL display device with higher productivity can be obtained.

  The present invention provides a transparent substrate, a low reflection layer formed on the transparent substrate and having an opening, a colored layer formed in the opening of the low reflection layer on the transparent substrate, and the low reflection layer A color filter for an organic EL display device, comprising: a metal electrode layer formed on the substrate; and an auxiliary electrode layer formed on the colored layer and having a connection electrode layer electrically connected to the metal electrode layer. provide.

According to the present invention, since the connection electrode layer is formed on the colored layer having the auxiliary electrode layer and the connection electrode layer having a relatively large area, the luminance is increased when used in an organic EL display device. It can be set as the color filter for organic EL display apparatuses which can prevent a nonuniformity suitably.
According to the invention, since the connection electrode layer is formed on the colored layer, in the organic EL display device, the connection electrode layer and the upper surface transparent electrode layer of the organic EL element side substrate are brought into contact with each other so as to be conductive. In addition, for example, no other member for contacting the connection electrode layer such as a column and the upper transparent electrode layer is required. Therefore, the number of manufacturing steps of the color filter for organic EL display devices can be reduced, and the color filter for organic EL display devices with good productivity can be obtained.

  In the above invention, the colored layer has a plurality of colored layers including a white colored layer, and is composed of a thick colored layer and a thin colored layer, and the thick colored layer is the white colored layer. It is a laminate of a colored layer and another colored layer of one color, and it is preferable that the connection electrode layer formed on the thick colored layer is in contact with the upper transparent electrode layer. . When used in an organic EL display device, a space can be provided between the colored layer of the thin film and the organic EL element, and foreign matter can be included in the space. Therefore, the connection electrode layer and the upper transparent electrode layer It is because it can suppress that a foreign material mixes in a contact surface, and can suppress deterioration of an organic EL element. Further, when the thick colored layer is the above-described laminate, a desired thick colored layer can be formed by a simple method.

  In the above invention, the connection electrode layer is formed on the colored layer overlapping the low reflection layer in a plan view, and has an opening for the connection electrode layer overlapping the opening of the low reflection layer in a plan view. It may be. This is because a metal material having no transparency can be used as the connection electrode layer.

  The organic EL display device of the present invention can prevent luminance unevenness, and has the effects of good productivity. Further, the color filter for an organic EL display device of the present invention has an effect that the above-described organic EL display device can be provided.

It is a schematic sectional drawing which shows an example of the organic electroluminescent display apparatus of this invention. It is a schematic sectional drawing which shows the other example of the organic electroluminescent display apparatus of this invention. It is a schematic sectional drawing which shows the other example of the organic electroluminescent display apparatus of this invention. It is a schematic sectional drawing which shows the other example of the organic electroluminescent display apparatus of this invention. It is a schematic sectional drawing which shows the other example of the organic electroluminescent display apparatus of this invention. It is a schematic sectional drawing which shows the other example of the organic electroluminescent display apparatus of this invention. It is a schematic sectional drawing which shows the other example of the organic electroluminescent display apparatus of this invention. It is the schematic which shows an example of the color filter for organic EL display apparatuses of this invention. It is a schematic sectional drawing which shows the other example of the color filter for organic EL display apparatuses of this invention. It is the schematic which shows the other example of the color filter for organic electroluminescent display apparatuses of this invention. It is a schematic sectional drawing which shows the other example of the color filter for organic EL display apparatuses of this invention. It is a schematic sectional drawing which shows the other example of the color filter for organic EL display apparatuses of this invention. It is a schematic sectional drawing which shows the other example of the color filter for organic EL display apparatuses of this invention. It is a schematic sectional drawing which shows the other example of the color filter for organic EL display apparatuses of this invention.

  Hereinafter, the organic EL display device and the color filter for the organic EL display device of the present invention will be described.

A. Organic EL Display Device The organic EL display device of the present invention includes a transparent substrate, a low reflection layer formed on the transparent substrate and having an opening, and a colored layer formed in the opening of the low reflection layer on the transparent substrate. A color filter comprising a metal electrode layer formed on the low reflection layer, and an auxiliary electrode layer having a connection electrode layer formed on the colored layer and electrically connected to the metal electrode layer, and a substrate, And an organic EL element having a lower electrode layer formed on the substrate, an organic EL layer including a light emitting layer formed on the lower electrode layer, and an upper transparent electrode layer formed on the organic EL layer. An organic EL element side substrate, and is arranged so that the colored layer side surface of the color filter and the organic EL element side surface of the organic EL element side substrate face each other, and the connection electrode layer and the above Up The surface transparent electrode layer is in contact with each other so as to be conductive.

  The description that “the connection electrode layer and the upper transparent electrode layer are in contact with each other” will be described later.

The organic EL display device of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic sectional view showing an example of the organic EL display device of the present invention. As shown in FIG. 1, the organic EL display device 100 of the present invention includes a transparent substrate 11, a low reflective layer 12 formed on the transparent substrate 11 having an opening, and an opening of the low reflective layer 12 on the transparent substrate 11. The formed colored layer 13 (the red colored layer 13R, the green colored layer 13G, the blue colored layer 13B, and the white colored layer 13W in FIG. 1), the metal electrode layer 14a formed on the low reflective layer 12, and the colored A color filter 10 including an auxiliary electrode layer 14 having a connection electrode layer 14b formed on the layer 13 and electrically connected to the metal electrode layer 14a; a substrate 71; and a lower electrode layer 81 formed on the substrate 71; An organic EL element side substrate including an organic EL layer 83 formed on the lower electrode layer 81 and including a light emitting layer, and an organic EL element 80 having an upper transparent electrode layer 85 formed on the organic EL layer 83. 0, the colored layer 13 side surface of the color filter 10 and the organic EL element side substrate 70 of the organic EL element side substrate 70 face each other, and the connection electrode layer 14b and the upper surface transparent electrode layer 85 Are in contact with each other so as to be conductive. As shown in FIG. 1, the organic EL element side substrate 70 is generally composed of a TFT 75 formed on the substrate 71, a first insulating layer 77 formed on the TFT 75, a lower electrode layer 81, and an upper transparent electrode layer. In order to prevent contact with 85, a second insulating layer 91 is formed on the substrate 71. An adhesive layer 99 may be formed between the color filter 10 and the organic EL element side substrate 70. Further, the organic EL display device 100 includes a wiring 201 extending from one pole of the power supply P to each TFT 75, a wiring 202-203 extending from the other pole of the power supply P to the upper transparent electrode layer 85, and the other of the power supply P. Wiring 202-204 extending from the pole to the auxiliary electrode layer 14.
In FIG. 1, the colored layer 13 is composed of a thick colored layer 13 ′ and a thin colored layer 13 ″, and the thick colored layer 13 ′ is a single colored layer (red colored layer 13R). In this example, the connection electrode layer 14b formed on the thick colored layer 13 ′ and the upper transparent electrode layer 85 are in contact with each other so as to be conductive.
Further, the connection electrode layer 14b is a transparent electrode layer, and an example in which the connection electrode layer 14b is continuously formed on all the colored layers 13 is shown.

FIG. 2 is a schematic sectional view showing another example of the organic EL display device of the present invention. In FIG. 2, the colored layer 13 has a plurality of colored layers 13R, 13G, 13B, 13W including a white colored layer 13W, and is composed of a thick colored layer 13 ′ and a thin colored layer 13 ″. The thick colored layer 13 ′ is a laminate of the white colored layer 13W and another colored layer (red colored layer 13R in FIG. 2), and is formed on the thick colored layer 13 ′. An example in which the electrode layer 14b and the upper transparent electrode layer 85 are in contact with each other is shown.
Note that the reference numerals not described in FIG. 2 can be the same as the reference numerals described in FIG.

FIG. 3 is a schematic sectional view showing another example of the organic EL display device of the present invention. FIG. 3 shows an example in which the connection electrode layer 14b has a connection electrode layer opening formed on the colored layer 13 overlapping the low reflection layer 12 in plan view and overlapping the opening of the low reflection layer 12 in plan view. ing.
Note that the reference numerals not described in FIG. 3 can be the same as the reference numerals described in FIG.

4 to 6 are schematic cross-sectional views showing other examples of the organic EL display device of the present invention. FIGS. 4 to 6 show examples in which the colored layer 13 is composed of colored layers 13R, 13G, 13B, and 13W having the same thickness. FIG. 5 shows an example in which the organic EL element side substrate 71 has a sealing layer 95.
Note that the reference numerals not described in FIGS. 4 and 5 can be the same as the reference numerals described in FIG. 1, and thus the description thereof is omitted here. Also, the reference numerals not described in FIG. 6 can be the same as the reference numerals described in FIG.

  FIG. 7 is a schematic cross-sectional view showing another example of the organic EL display device of the present invention. FIG. 7 shows an example in which the color filter 10 has an overcoat layer 15 formed so as to cover the low reflective layer 12 and the colored layer 13. In addition, about the code | symbol which is not demonstrated in FIG. 7, since it can be set as the code | symbol demonstrated in FIG. 1, description here is abbreviate | omitted.

According to the present invention, since the connection electrode layer is formed on the colored layer having the auxiliary electrode layer and the connection electrode layer having a relatively large area, it is possible to suitably prevent luminance unevenness. An EL display device can be obtained.
In addition, according to the present invention, the connection electrode layer is formed on the colored layer and is in contact with the upper transparent electrode layer so that the connection electrode layer such as a column and the upper transparent electrode layer are in contact with each other. Therefore, the number of manufacturing steps of the organic EL display device can be reduced, and an organic EL display device with good productivity can be obtained.

More specifically, according to the present invention, since the auxiliary electrode layer is provided, the current from the organic EL element side substrate side can be guided to the color filter side through the auxiliary electrode layer, so that the luminance is lost. An organic EL display device capable of preventing occurrence of unevenness can be obtained.
Further, according to the present invention, since the connection electrode layer is formed on the colored layer having a relatively large area, the conduction area of the connection electrode layer and the upper surface transparent electrode layer can be increased. The current can be easily released from the side substrate side to the color filter side. Therefore, an organic EL display device that can suitably prevent the above-described luminance unevenness can be obtained.
In addition, according to the present invention, the connection electrode layer is formed on the colored layer and is in contact with the upper surface transparent electrode layer so as to conduct the connection electrode layer and the upper surface transparent electrode layer using the colored layer. For example, it is possible to reduce the number of manufacturing steps of the organic EL display device because other members for contacting the connection electrode layer such as the pillar portion and the upper transparent electrode layer are not required. An organic EL display device with good productivity can be obtained. Moreover, since it is not necessary to form the other member mentioned above in the organic EL element side board | substrate, the fall of the yield of an organic EL display apparatus can be made small.
Hereinafter, the details of the organic EL display device of the present invention will be described.

I. Structure of Organic EL Display Device The organic EL display device of the present invention has a color filter and an organic EL element side substrate, and the colored layer side surface of the color filter and the organic EL element side of the organic EL element side substrate. It arrange | positions so that the surface may oppose, The said connection electrode layer and the said upper surface transparent electrode layer are contacting so that it may conduct | electrically_connect.
Here, “the connection electrode layer and the upper surface transparent electrode layer are in contact with each other” is not only an aspect in which the connection electrode layer and the upper surface transparent electrode layer are in direct contact, but also the connection electrode layer and The mode which is contacting via conductive layers, such as a conductive adhesive layer, between upper surface transparent electrode layers is included. In the present invention, it is more preferable that the connection electrode layer and the upper transparent electrode layer are in direct contact with each other. This is because the organic EL display device can be manufactured by a simpler process.

  The organic EL display device of the present invention has a so-called top emission type structure in which light is extracted from the color filter side for the organic EL display device.

  As the structure of such an organic EL display device, one or more colored layers of the color filter are arranged by arranging the colored layer side surface of the color filter and the organic EL element side surface of the organic EL element side substrate to face each other. The connection electrode layer formed above and the upper surface transparent electrode layer of the organic EL element side substrate are not particularly limited as long as they can be brought into contact with each other. For example, the structure of the organic EL display device is a structure in which a connection electrode layer formed on a part of a color layer of a color filter can be brought into contact with an upper transparent electrode layer (hereinafter referred to as a first filter). In some cases, the structure may be referred to as a structure.) The connection electrode layer formed on all the colored layers of the color filter and the upper transparent electrode layer can be brought into contact with each other so as to be conductive. (Hereinafter, this may be referred to as the second structure.)

In the case where the structure of the organic EL display device is the first structure described above, a more specific structure of the organic EL display device is a color filter including a thick colored layer and a thin colored layer. Use a structure that is composed of colored layers having different thicknesses, and preferably has a structure in which the connection electrode layer formed on the thick colored layer and the upper transparent electrode layer are in contact with each other so as to be conductive. (For example, FIG. 1 etc.). When the organic EL display device of the present invention has the above-described structure, a space can be provided between the colored layer of the thin film and the organic EL element in the organic EL display device. Therefore, foreign matter can be included in the space, and foreign matter can be prevented from entering the contact surfaces of the connection electrode layer and the upper transparent electrode layer, so that deterioration of the organic EL element can be suppressed. It is.
In the present invention, the thick colored layer refers to the thickest colored layer among the different colored layers, and the thin colored layer refers to a colored layer other than the thick colored layer.

  In addition, when the structure of the organic EL display device is the first structure described above, in addition to the above structure, for example, as a color filter, the colored layer is formed of a colored layer having an equivalent thickness, A structure in which the connection electrode layer is formed only on the colored layer and the connection electrode layer formed on a part of the colored layer and the upper transparent electrode layer are brought into contact with each other so as to be conductive can also be used.

  On the other hand, when the structure of the organic EL display device is the second structure described above, as a more specific structure of the organic EL display device, as a color filter, the colored layer is composed of a colored layer having an equivalent thickness, A structure in which the connection electrode layer is formed on all the colored layers, and the connection electrode layer formed on all the colored layers and the upper transparent electrode layer are brought into contact with each other so as to be conductive (for example, FIG. 4 etc.). Since the organic EL display device of the present invention has the above-described structure, the conduction area of the connection electrode layer and the upper surface transparent electrode layer of the entire organic EL display device can be further increased, and thus the above-described luminance unevenness is suitably suppressed. And it can be set as the organic electroluminescence display which can perform a favorable display.

II. Configurations of Organic EL Display Device The organic EL display device of the present invention includes a color filter and an organic EL element substrate. Each configuration will be described below.

1. Color filter The color filter used for this invention has a transparent substrate, a low reflection layer, a colored layer, and an auxiliary electrode layer.
The color filter has a colored layer that transmits light of a specific wavelength, and is used for performing desired color display by selectively transmitting the light of the specific wavelength among the light of the organic EL element. It is what
In the present invention, the colored layer is used to bring the connection electrode layer into conduction with the upper transparent electrode layer of the organic EL element side substrate facing the color filter.

(1) Structure of color filter The structure of the color filter used in the present invention will be described.
As the structure of the color filter used in the present invention, specifically, a structure in which the colored layer is composed of a thick colored layer and a thin colored layer, and a structure in which the colored layer is composed of the same thickness. It can be divided roughly.

When the color filter has a structure in which the colored layer is composed of a thick colored layer and a thin colored layer, examples of the color filter structure include FIGS. 8A, 8B, and 8C. 9 and the structure shown in FIGS. 10 (a) and 10 (b).
FIG. 8A is a schematic plan view showing an example of the color filter in FIG. 1, and FIG. 8B is a cross-sectional view taken along the line AA in FIG. 8A. In FIG. 8A, the transparent substrate and the connection electrode layer are omitted for easy explanation. FIG. 9 is a schematic sectional view showing an example of the color filter in FIG. FIG. 10A is a schematic plan view showing another example of the color filter in FIG. 3, and FIG. 10B is a cross-sectional view taken along the line BB in FIG. In FIG. 10A, the transparent substrate is omitted for the sake of easy explanation. Further, X in FIGS. 8B and 10B is an opening of the low reflection layer 12, and Y in FIG. 10B is a connection electrode layer opening.

When the color filter has a structure in which the colored layer is composed of a thick colored layer and a thin colored layer, the color filter has a preferable structure among the organic EL display devices having the first structure described above. An organic EL display device can be obtained. When the color filter has the above-described structure, the connection electrode layer is brought into contact with the top transparent electrode layer using a thick colored layer.
The thick colored layer is not particularly limited as long as one or more of the colored layers is provided so that the thickness of one or more colored layers is thicker than the thickness of the other colored layers. More preferably, it is provided. In the present invention, it is preferable to form the colored layer by using a photolithography method. In the photolithography method, it is easy to adjust the thickness of the colored layer in units of colors to form the colored layer. is there.
In addition, when the thick colored layer is formed in color units, the colored layer of at least one color among the colored layers of the plurality of colors is formed to be thicker than the colored layers of other colors. If it is done, it will not be specifically limited. For example, when a plurality of colored layers have four colored layers of red, green, blue, and white, as shown in FIGS. 8 to 10, the thickness of the colored layer of one color (in FIGS. 8 to 10). The red colored layer 13R) may be formed thicker than the colored layers of other colors, and although not shown, the colored layers of two or more colors are formed thicker than the colored layers. Also good.

The thick colored layer 13R may be a single colored layer (red colored layer 13R in FIG. 8) as shown in FIG. 8, and the colored layers 13R, 13G, 13B, and 13W of multiple colors are colored white. When the layer 13W is included, as shown in FIG. 9, it may be a laminate of a white colored layer 13W and another colored layer (red colored layer in FIG. 9). In this invention, since it is preferable to set it as an organic electroluminescent display apparatus with higher productivity, it is preferable that there are few processes also about the formation method of a color filter. In the case where the thick colored layer is the above-described laminate, it is possible to form both the one used only in the white colored layer using the color filter and the one constituting the laminate in the same process. Therefore, it is possible to obtain a thick colored layer without increasing the number of steps. Further, since the thick colored layer is the above-described laminate, there is an advantage that the thickness can be easily adjusted to a desired thickness.
When the thick colored layer is the above-described laminate, as shown in FIG. 9, another colored layer 13R and a white colored layer 13W may be sequentially laminated on the transparent substrate 11, which is not illustrated. However, a white colored layer and another colored layer of one color may be sequentially laminated on the transparent substrate.

The difference in thickness between the thick colored layer and the thin colored layer is not particularly limited as long as a space can be provided between the thin colored layer and the upper transparent electrode layer, but it is in the range of 1 μm or more, particularly 1 μm to 8 μm. Especially, it is preferable that it exists in the range of 1 to 6 micrometers. If the difference in thickness is less than the above range, it may be difficult to enclose foreign matter in the space provided between the thinnest colored layer and the upper transparent electrode layer. If the difference exceeds the above range, it may be difficult to form a thick colored layer, or the distance between the thin colored layer and the organic EL element becomes too large. This is because it is likely to occur.
The difference in thickness between the thick colored layer and the thin colored layer refers to, for example, the distance indicated by p in FIG.
Although not shown, when the thickness of the colored layer is three or more, the difference in thickness between the thickest colored layer and the thinnest colored layer is the above-described thickness difference.

On the other hand, when the structure of the color filter is a structure in which the colored layer is composed of a colored layer having the same thickness, examples of the structure of the color filter include the structures shown in FIGS. 11, 12, and 13. .
11 is a schematic sectional view showing an example of the color filter in FIG. 4, FIG. 12 is a schematic sectional view showing an example of the color filter in FIG. 5, and FIG. 13 is a schematic sectional view showing an example of the color filter in FIG. FIG.

  When the structure of the color filter is a structure in which a plurality of colored layers are composed of colored layers having the same thickness, the organic EL display device having the second structure described above can be obtained. Further, in this case, the thickness of the colored layer can be selected according to the use of the organic EL display device of the present invention, but the thickness capable of enclosing foreign matter generated during the formation of the colored layer inside the colored layer. More preferably. Since the adhesion of foreign matter on the surface of the colored layer can be prevented, deterioration of the organic EL element due to the foreign matter can be suppressed.

(2) Each structure of a color filter (a) Colored layer The colored layer used for this invention is formed in the opening part of the low reflection layer on a transparent substrate. In the present invention, it usually has three colored layers of a red colored layer, a green colored layer, and a blue colored layer. Moreover, you may have a colored layer of colors other than the said three colored layers. In the present invention, it is preferable to have a white colored layer in addition to the above-described three colored layers.
Each colored layer is used by being arranged in each pixel in the organic EL display device.

  The pattern arrangement of the colored layer can be the same as the pixel arrangement used in a general organic EL display device. For example, a known arrangement such as a stripe type, a mosaic type, a triangle type, or a four-pixel arrangement type can be used, and the area of each colored layer can be arbitrarily set.

  Moreover, as a cross-sectional shape of the colored layer perpendicular to the transparent substrate surface, the colored layer can be formed on the transparent substrate, and the connection electrode layer is electrically connected to the metal electrode layer on the colored layer. If it can form in, it will not specifically limit. For example, as shown in FIG. 8B or the like, the side surface of the colored layer 13 may be in a shape substantially perpendicular to the surface of the transparent substrate 11, and the base of the colored layer 13 is colored as shown in FIG. The taper shape which becomes larger than the top part of the layer 13 may be sufficient. This is because, when the cross-sectional shape of the colored layer is the tapered shape, disconnection of the connection electrode layer formed so as to cover the colored layer and the side surface of the colored layer can be suppressed.

The taper angle of the colored layer is not particularly limited as long as the connection electrode layer can be formed on the side surface of the colored layer, but is 90 ° or less, particularly within the range of 30 ° to 80 °, particularly 30 ° to It is preferably within the range of 70 °. This is because, when the taper angle exceeds the above range, disconnection may easily occur in the connection electrode layer formed on the side surface of the colored layer.
Further, the lower limit of the taper angle is, for example, about 15 ° in consideration of the thickness of the colored layer and the like. The taper angle refers to the angle formed by the base of the colored layer (transparent substrate surface) and the side surface of the colored layer, and is the angle represented by θ in FIG.

The thickness of the colored layer is not particularly limited as long as a desired color display can be performed, and can be appropriately selected according to the form of the color filter, the use of the organic EL display device, and the like. . The specific thickness of the colored layer is preferably in the range of 1 μm to 10 μm, more preferably in the range of 1 μm to 8 μm, and particularly preferably in the range of 2 μm to 8 μm. This is because if the thickness of the colored layer is less than the above range or exceeds the above range, it may be difficult to form the colored layer itself.
When the color filter has a plurality of colored layers having different thicknesses, both the thickest colored layer and the thinnest colored layer are formed to have thicknesses within the above-described range.
Moreover, when the said color filter has the colored layer of several colors which has equivalent thickness, it is preferable to form with a big thickness in the range mentioned above. This is because the above-described foreign matter can be suitably included in the colored layer.

  The colored layer is formed by dispersing or dissolving a colorant such as a pigment or dye of each color in a resin such as a photosensitive 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. And pigments. 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.
The white colored layer can be formed using only a photosensitive resin. However, in order to perform a desired white display using an organic EL display device, a colorant for toning is dispersed or dissolved. May be. Examples of such a colorant include the above-described red, green, and blue colorants, and colorants such as yellow and black. About a specific coloring agent, since a well-known thing can be used, description here is abbreviate | omitted.

  As a photosensitive resin, since a well-known photosensitive resin can be used as a general coloring layer material, description here is abbreviate | omitted.

(B) Auxiliary electrode layer The auxiliary electrode layer used in the present invention has a connection electrode layer and a metal electrode layer.

(I) Connection electrode layer The connection electrode layer used for this invention is formed on a colored layer, and is electrically connected with a metal electrode layer. The connection electrode layer is in contact with the upper transparent electrode layer formed on the organic EL element side substrate so as to be conductive.

  In the present invention, “the connection electrode layer is electrically connected to the metal electrode layer” means that the connection electrode layer is formed so as to cover at least a part of the metal electrode layer, and the connection electrode layer is a metal electrode layer. And the embodiment formed integrally with each other.

  The connection electrode layer is electrically connected to the metal electrode layer and is formed on at least a part of the side surface of the colored layer. In the present invention, the connection electrode layer is preferably formed so as to cover the entire side surface of the colored layer. This is because the process of forming the connection electrode layer can be a simple process. Further, the connection electrode layer and the metal electrode layer can be made difficult to break.

  The connection electrode layer is not particularly limited as long as it does not prevent light from the organic EL element from being transmitted through the colored layer formed in the opening of the low reflection layer and emitted to the outside of the organic EL display device. The metal connection electrode layer using the metal material which does not have transparency may be sufficient, and the transparent connection electrode layer which has transparency may be sufficient.

  When the connection electrode layer is a metal connection electrode layer, the metal connection electrode layer is formed on the colored layer 13 that overlaps the low reflection layer 12 in plan view, as shown in FIGS. The connection electrode layer opening Y is formed so as to overlap the opening X of the low reflection layer in plan view. In this case, the positional relationship between the opening of the low reflection layer and the connection electrode layer opening is not particularly limited as long as a desired color display can be performed, but as shown in FIGS. It is preferable that the opening X of the low reflection layer exists inside the connection electrode layer opening Y in plan view. This is because the aperture ratio of the organic EL display device can be improved.

  Moreover, the said metal connection electrode layer may be formed in the shape mentioned above on one part colored layer, and may be formed in the shape mentioned above on all the colored layers. In the present invention, in particular, when the color filter includes a plurality of colored layers having the same thickness, the metal connection electrode layer is preferably formed on all the colored layers. This is because the conductive area between the metal connection electrode layer and the upper transparent electrode layer can be made larger, and an organic EL display device that can more suitably prevent luminance unevenness can be obtained.

  Further, as shown in FIGS. 10A, 10B, and 13, the metal connection electrode layer 14b may be formed integrally with a metal electrode layer 14a described later. It may be formed separately from the layer. In the present invention, the metal connection electrode layer is preferably formed integrally with the metal electrode layer. Since the metal connection electrode layer and the metal electrode layer can be formed simultaneously in the same process, the manufacturing process of the organic EL display device of the present invention can be reduced, and an organic EL display device with better productivity can be obtained. Because it can.

On the other hand, when the connection electrode layer is a transparent connection electrode layer, the transparent connection electrode layer may be continuously formed on the colored layer, and is formed in the same shape as the metal connection electrode layer described above. May be.
In the present invention, it is particularly preferable that the transparent connection electrode layer is continuously formed on the colored layer. The transparent connection electrode layer can be formed by a simple method, and when the connection electrode layer is continuously formed on the entire surface of the color filter, it is possible to impart gas barrier properties to the color filter. This is because moisture can be prevented from entering the inside, and deterioration of the organic EL element can be suppressed.

  The transparent connection electrode layer may be formed on some of the colored layers, or may be formed on all of the colored layers, but is more preferably formed on all of the colored layers. In this case, as described above, the transparent connection electrode layer is particularly preferably formed continuously on the entire surface of the color filter.

  The transparent connection electrode layer may be formed on a metal electrode layer formed on the low reflection layer, or may be formed between the low reflection layer and the metal electrode layer.

  The thickness of the connection electrode layer is not particularly limited as long as it has a desired conductivity, but it is within the range of 10 nm to 500 nm, especially within the range of 20 nm to 400 nm, particularly within the range of 30 nm to 300 nm. Is preferred. This is because when the thickness of the connection electrode layer is less than the above range, the resistance of the connection electrode layer may increase. When the thickness of the connection electrode layer exceeds the above range, the formation time of the connection electrode layer This is because it takes a lot and the manufacturing cost may be high. Moreover, it is because the stress of a connection electrode layer becomes large and it may become easy to produce a crack etc.

Next, the material of the connection electrode layer will be described.
When the connection electrode layer is a metal connection electrode layer, the metal material used can be the same as the metal material described in the section of the metal electrode layer to be described later, and thus the description thereof is omitted here.
In the present invention, the metal connection electrode layer and the metal electrode layer are more preferably the same material. The conductivity can be improved, and the metal connection electrode layer and the metal electrode layer can be integrally formed, so that the number of manufacturing steps of the organic EL display device can be reduced. Because.

  On the other hand, when the connection electrode layer is a transparent connection electrode layer, examples of the material of the transparent connection electrode layer include a metal oxide having transparency and conductivity. Examples of such metal oxides include indium tin oxide (ITO), indium oxide, zinc oxide, and stannic oxide.

  As a method for forming the connection electrode layer, a known method can be used as a general method for forming an electrode layer. For example, a method of forming a thin film by a vapor deposition method or a sputtering method can be given. In addition, when the connection electrode layer is formed in a predetermined pattern shape, if necessary, a photomask or the like is used to form a thin film by the above-described vapor deposition method or the thin film formed by the vapor deposition method or the like. An etching method using a lithography method can be given.

(ii) Metal electrode layer The metal electrode layer used in the present invention is formed on the low reflection layer. The metal electrode layer is formed so as to be electrically connected to the connection electrode layer described above.

The metal electrode layer is usually formed along the low reflection layer. The line width of such a metal electrode layer is not particularly limited as long as it can be formed on the low reflection layer, and may be smaller than the line width of the low reflection layer, and is equal to the line width of the low reflection layer. May be.
The specific line width of the metal electrode layer is preferably 10 μm or more, more preferably in the range of 12 μm to 100 μm, and particularly preferably in the range of 13 μm to 90 μm. This is because if the line width of the metal electrode layer is less than the above range, the electric resistance of the auxiliary electrode layer may not be sufficiently small.
In addition, the upper limit of the line width of the metal electrode layer can be made equal to the line width of the low reflection layer formed in the lower layer. This is because when the line width of the metal electrode layer is larger than the line width of the low reflective layer, reflection of external light by the metal electrode layer may be easily observed by an observer.

  The thickness of the metal electrode layer is not particularly limited as long as it can be formed on the low reflection layer, and can be appropriately selected according to the use of the organic EL display device. Since the specific thickness of the metal electrode layer can be the same as the thickness of the connection electrode layer described above, the description thereof is omitted here.

Next, the metal material used for the metal electrode layer will be described.
Examples of the metal material used for the metal electrode layer include metals such as Cu, Ag, Au, Pt, Al, Cr, and Co, alloys of the above metals such as APC (alloys including Ag, Pd, and Cu), or MAM. A multilayer metal film represented by (a multilayer metal film in which a molybdenum film, an aluminum / neodymium alloy film, and a molybdenum film are laminated in this order) can be given.
In the present invention, it is particularly preferable to use APC. This is because the conductivity of the auxiliary electrode layer can be improved.

  Examples of a method for forming such a metal electrode layer include a method in which a thin film is formed by a vapor deposition method or a sputtering method and then etched using a photolithography method.

(C) Low reflection layer The low reflection layer used in the present invention is formed on a transparent substrate and has an opening. The low reflection layer is used to suppress external light reflection of the metal electrode layer formed on the low reflection layer.

  The average light reflectance of the low reflection layer in the present invention is not particularly limited as long as it can sufficiently suppress reflection of external light entering the viewing side of the metal electrode layer, but specifically, The average light reflectance in the wavelength region of 380 nm to 800 nm is preferably 10% or less, more preferably 9% or less, and particularly preferably 8% or less. This is because if the light reflectance exceeds the above range, it may be difficult to sufficiently prevent external light reflection by the metal electrode layer. The average light reflectivity is measured by an optical measuring instrument according to JIS K7105. A commercial item can be used for an optical measuring device, for example, HR-100 by Murakami Color Research Laboratory can be used.

  The line width of the low reflection layer is not particularly limited as long as it can suppress reflection of external light entering the viewing side in the metal electrode layer described above, and the organic EL display device of the present invention. It can be appropriately selected according to the use of the above. The line width of the specific low reflection layer is preferably 10 μm or more, more preferably in the range of 12 μm to 100 μm, particularly preferably in the range of 13 μm to 90 μm. When the line width of the low reflective layer is less than the above range, it may be difficult to form the low reflective layer itself, or the metal electrode layer may be difficult to form on the low reflective layer. Because there is. Moreover, it is because it may become difficult to have the opening part of a desired magnitude | size when the width | variety of a low reflection layer exceeds the said range.

  The arrangement of the openings of the low reflection layer can be the same as the pixel arrangement used in a general organic EL display device. Since the arrangement of the openings of the specific low reflection layer can be the same as the arrangement of the colored layers described above, the description thereof is omitted here.

Such a low reflection layer may have a light shielding property or may not have a light shielding property, but more preferably has a light shielding property. The low reflection layer can be used as a light-shielding portion, and an organic EL display device with good contrast can be obtained.
When the low reflection layer has light shielding properties, a metal light shielding layer such as chromium or chromium oxide or a resin light shielding layer in which a black colorant such as carbon is dispersed in a binder resin is used as the low reflection layer. Note that the materials used for the metal light-shielding layer and the resin light-shielding layer are not limited to those described above, and known materials can be used as a material for the light-shielding portion of a general color filter. . The thickness of the low reflection layer is not particularly limited as long as external light reflection by the metal electrode layer can be suppressed. When the low reflection layer is a metal light shielding layer, the thickness is set to about 0.2 μm to 0.4 μm, and when the low reflection layer is a resin light shielding layer, the thickness is set to about 0.5 μm to 2 μm.

On the other hand, when the low reflective layer does not have light shielding properties, examples of the low reflective layer include tantalum oxide (TaO), oxynitride (TaNO), boron oxide (TaBO), and boron oxynitride (TaBNO). And a layer formed of a tantalum compound containing oxygen such as silicon oxide (SiO _x ), chromium nitride (CrN), or the like. The thickness of the low reflection layer is not particularly limited as long as reflection of external light by the metal electrode layer can be suppressed, but it is used within a range of 5 nm to 30 nm, more preferably within a range of 10 nm to 20 nm.

  About the formation method of a low reflection layer, it can be made to be the same as that of a well-known method as what is used for a general color filter. For example, when the low reflection layer is a metal light shielding layer, a method of forming a thin film by a vapor deposition method or a sputtering method and etching using a photolithography method can be exemplified. For example, when the low reflection layer is a resin light-shielding layer, a photolithography method can be suitably used.

(D) Transparent substrate The transparent substrate used for this invention is used in order to support the low reflection layer mentioned above, a colored layer, and an auxiliary electrode layer.

  The transparent substrate is not particularly limited as long as it is a substrate transparent to visible light, and the same transparent substrate used for a general color filter can be used. Specifically, a rigid material such as quartz glass, Pyrex (registered trademark) glass, or synthetic quartz, or a transparent flexible material having flexibility such as a transparent resin film or an optical resin plate can be used.

(E) Other configurations The color filter used in the present invention is not particularly limited as long as it has the above-described configurations, and configurations other than those described above can be appropriately selected and used as necessary.

  For example, as shown in FIG. 14, the color filter used in the present invention may have an overcoat layer 15 formed so as to cover the low reflective layer 12 and the colored layer 13. In this case, the metal electrode layer 14 a and the connection electrode layer 14 b in the auxiliary electrode layer 14 are formed on the overcoat layer 15. In the present invention, when the overcoat layer 15 is provided, the surfaces of the low reflective layer 12 and the colored layer 13 can be planarized, and the auxiliary electrode layer 14 can be formed favorably. In addition, intrusion of oxygen, water vapor, or the like from the color filter side into the organic EL display device can be suppressed. 14 is a schematic sectional view showing an example of the color filter in FIG.

The material of the overcoat layer is not particularly limited as long as it has a predetermined light transmittance, and may be a photocurable resin or a thermosetting resin.
Examples of the material for such an overcoat layer include general binder resins, monomer components, photopolymerization initiators, thermal polymerization initiators, and the like.

  The thickness of the overcoat layer is not particularly limited as long as a predetermined light transmittance can be obtained and the surface of the colored layer and the low reflection layer can be flattened. It is preferably in the range of 5.0 μm, more preferably in the range of 0.7 μm to 3.0 μm, and particularly preferably in the range of 0.9 μm to 2.0 μm.

  The method for forming the overcoat layer is not particularly limited as long as it can be formed so as to cover the surfaces of the colored layer and the low reflection layer. For example, the spin coat method, the casting method, the dipping method, the bar coat method , Blade coating method, roll coating method, gravure coating method, flexographic printing method, spray coating method and the like.

(3) Color Filter Forming Method Regarding the color filter forming method used in the present invention, since a known method can be used as a general color filter forming method, description thereof is omitted here.

2. Organic EL Element Side Substrate The organic EL element side substrate used in the present invention has a substrate and an organic EL element.

(1) Organic EL Element The organic EL element used in the present invention is a bottom electrode layer formed on the substrate, an organic EL layer formed on the bottom electrode layer and including a light emitting layer, and the organic EL layer. It has the upper surface transparent electrode layer formed in this.

(A) Organic EL layer The organic EL layer used in the present invention is formed on a lower electrode layer, which will be described later, and includes a light emitting layer.
Moreover, an organic EL layer is arrange | positioned and used for each pixel in an organic EL display apparatus. Moreover, it is usually arranged so as to face each colored layer of the color filter.

  In addition to the light emitting layer, the organic EL layer is usually composed of a plurality of organic layers, and transports holes to a charge injection layer such as a hole injection layer or an electron injection layer, or to a white light emitting layer. And a charge transport layer such as a hole transport layer for transporting electrons and an electron transport layer for transporting electrons to the white light emitting layer. Hereinafter, each layer constituting the organic EL layer used in the present invention will be described.

(i) Light emitting layer The light emitting layer used in the present invention is not particularly limited as long as desired light emission can be obtained. For example, the light emitting layer may have a white light emitting layer, a red light emitting layer, a blue light emitting layer and a green light emitting layer. The light emitting layer may have three colors of light emitting layers. In the present invention, it is particularly preferable to have a white light emitting layer. Hereinafter, the white light emitting layer which is a preferable embodiment in the present invention will be described.

  The white light emitting layer used as a suitable light emitting layer in the present invention may be any material that can emit white light. Specifically, such a white light emitting layer has at least blue light (430 nm to 470 nm), green light (470 nm to 600 nm), and red light (600 nm to 700 nm) when a voltage is applied to the organic EL layer. As long as it has an emission spectrum in the wavelength range of. Furthermore, the ratio of the maximum emission intensity of the green light (470 nm to 600 nm) peak and the maximum emission intensity of the blue light (430 nm to 470 nm) peak in the emission spectrum (maximum emission intensity of the green light peak / maximum emission intensity of the blue light peak). Is preferably in the range of 0.3 to 0.8, more preferably in the range of 0.3 to 0.7, and particularly preferably in the range of 0.3 to 0.5. preferable.

  When the ratio of the maximum emission intensity of the green light peak and the maximum emission intensity of the blue light peak is within the above range, the power consumption reduction effect due to the large transmittance of the blue pattern can be more effectively exhibited. it can. For red light (600 nm to 700 nm), the ratio of the maximum emission intensity of the red light peak to the maximum emission intensity of the blue light peak (maximum emission intensity of the red light peak / maximum emission intensity of the blue light peak) is 0.3. It is preferable to be within the range of -1.0.

  The material constituting such a white light emitting layer is not particularly limited as long as it emits fluorescence or phosphorescence. In addition, the light emitting material may have a hole transport property or an electron transport property. Examples of the light emitting material include a dye material, a metal complex material, and a polymer material.

  Examples of the dye-based material include cyclopentamine derivatives, tetraphenylbutadiene derivatives, triphenylamine derivatives, oxadiazol derivatives, pyrazoloquinoline derivatives, distyrylbenzene derivatives, distyrylarylene derivatives, silole derivatives, thiophene ring compounds, Examples thereof include pyridine ring compounds, perinone derivatives, perylene derivatives, oligothiophene derivatives, trifumanylamine derivatives, oxadiazole dimers, and pyrazoline dimers.

  In addition, the above metal complex materials include an aluminum quinolinol complex, a benzoquinolinol beryllium complex, a benzoxazole zinc complex, a benzothiazole zinc complex, an azomethylzinc complex, a porphyrin zinc complex, and a europium complex, or a central metal, Al, Examples of the metal complex include Zn, Be, and the like, or rare earth metals such as Tb, Eu, and Dy, and the ligand includes oxadiazole, thiadiazole, phenylpyridine, phenylbenzimidazole, and a quinoline structure. .

  Examples of the polymer material include polyparaphenylene vinylene derivatives, polythiophene derivatives, polyparaphenylene derivatives, polysilane derivatives, polyacetylene derivatives, and the like, polyfluorene derivatives, polyvinylcarbazole derivatives, and the above-described dye materials and metal complexes. Examples include polymerized system materials.

  Examples of the method for forming the white light emitting layer include a vapor deposition method, a printing method, an inkjet method, a spin coating method, a casting method, a dipping method, a bar coating method, a blade coating method, a roll coating method, a gravure coating method, and a flexographic method. Examples thereof include a printing method, a spray coating method, and a self-assembly method (alternate adsorption method, self-assembled monolayer method). Among these, it is particularly preferable to use a vapor deposition method, a spin coating method, and an ink jet method.

  The thickness of the white light emitting layer used in the present invention is usually about 5 nm to 5 μm.

(ii) Hole Injection Layer In the present invention, a hole injection layer may be formed between the white light emitting layer and the anode (the lower electrode layer 81 or the upper transparent electrode layer 85 in FIG. 1 and the like). By providing the hole injection layer, the injection of holes into the white light emitting layer is stabilized, and the light emission efficiency can be increased.

  As a material for forming the hole injection layer used in the present invention, a material generally used for a hole injection layer of an organic EL element can be used. The material for forming the hole injection layer may be any material that has either a hole injection property or an electron barrier property.

  Specifically, the hole injection layer forming material includes triazole derivatives, oxadiazole derivatives, imidazole derivatives, polyarylalkane derivatives, pyrazoline derivatives, pyrazolone derivatives, phenylenediamine derivatives, arylamine derivatives, amino-substituted chalcone derivatives, oxazoles. Examples include derivatives, styrylanthracene derivatives, fluorenone derivatives, hydrazone derivatives, stilbene derivatives, silazane derivatives, polysilane-based, aniline-based copolymers, and conductive polymer oligomers such as thiophene oligomers. Furthermore, examples of the material for forming the hole injection layer include porphyrin compounds, aromatic tertiary amine compounds, and styrylamine compounds.

  The thickness of the hole injection layer made of such a material is usually about 5 nm to 1 μm.

(iii) Electron Injection Layer In the present invention, an electron injection layer may be formed between the white light emitting layer and the cathode (upper transparent electrode layer 85 or lower electrode layer 81 in FIG. 1 and the like). This is because by providing the electron injection layer, the injection of electrons into the white light emitting layer is stabilized, and the luminous efficiency can be increased.

  Examples of the material for forming the electron injection layer used in the present invention include heterocyclic tetracarboxylic anhydrides such as nitro-substituted fluorene derivatives, anthraquinodimethane derivatives, diphenylquinone derivatives, thiopyrandioxide derivatives, naphthaleneperylene, carbodiimides, Fluorenylidenemethane derivatives, anthraquinodimethane and anthrone derivatives, oxadiazole derivatives, thiazole derivatives in which the oxygen atom of the oxadiazole ring of the oxadiazole derivative is replaced with a sulfur atom, quinoxaline ring known as an electron withdrawing group Examples thereof include quinoxaline derivatives having bismuth, metal complexes of 8-quinolinol derivatives such as tris (8-quinolinol) aluminum, phthalocyanines, metal phthalocyanines, and distyrylpyrazine derivatives.

  The film thickness of the electron injection layer made of such a material is usually about 5 nm to 1 μm.

(B) Upper surface transparent electrode layer The upper surface transparent electrode layer in this invention is formed on the organic EL layer mentioned above, applies a voltage to the organic EL layer pinched | interposed between the lower surface electrode layers mentioned later, and is a white light emitting layer. Provided to cause light emission. The upper transparent electrode layer may be formed on the entire surface of the substrate or may be formed in a predetermined pattern, but is usually formed on the entire surface of the substrate.

  Moreover, since the upper surface transparent electrode layer transmits light generated in the white light emitting layer to the color filter side for the organic EL display device, as shown in FIG. The EL layer 83 is disposed between the organic EL display device color filter 10 positioned above the organic EL layer 83.

  Examples of the material for forming the upper transparent electrode layer used in the present invention include metal oxides having transparency and conductivity. Examples of such metal oxides include indium tin oxide (ITO), indium oxide, zinc oxide, and stannic oxide.

  The film thickness of the upper transparent electrode layer made of such a material is usually about 100 nm to 300 nm.

  As a method for forming the upper surface transparent electrode layer, for example, a method of forming a thin film by a vapor deposition method or a sputtering method and then patterning by a photolithography method as necessary is suitably used.

(C) Bottom electrode layer The bottom electrode layer used in the present invention is formed on a substrate, and more specifically, is disposed between the substrate and the organic EL layer. The lower electrode layer forms the other electrode layer for causing the white light emitting layer to emit light, and is configured as an electrode layer having a charge opposite to that of the upper transparent electrode layer.

Examples of the material for forming the lower surface electrode layer include metals, alloys, and mixtures thereof having a work function as small as about 4 eV or less. Specifically, sodium, sodium - potassium alloy, magnesium, lithium, magnesium and copper mixtures, magnesium and silver mixture, magnesium and aluminum mixture, magnesium and indium mixture, aluminum and aluminum oxide (Al 2 _{O 3)} mixture, indium, Examples include lithium and aluminum mixtures, and rare earth metals. More preferably, magnesium and silver mixture, magnesium and aluminum mixture, magnesium and indium mixture, aluminum and aluminum oxide (Al 2 _{O 3)} mixture, and it can include lithium and aluminum mixture.

  The lower electrode layer preferably has a sheet resistance of several Ω / cm or less. The film thickness of the lower electrode layer is usually about 10 nm to 1 μm.

  As a method for forming the lower electrode layer, for example, a method of forming a thin film by a vapor deposition method or a sputtering method and then etching using a photolithography method is suitably used. Note that a TFT (Thin Film Transistor) for controlling a current flowing through the organic EL element is connected to the lower electrode layer.

(2) Substrate The substrate used in the present invention may be any substrate that can support an organic EL element or the like, and those generally used as a constituent member of an organic EL display device can be used. In addition, since the organic EL display device of the present invention is a so-called top emission system in which light is extracted from the color filter side for the organic EL display device, the substrate of the organic EL element side substrate is transparent or opaque. It may be.

(3) Other configurations The organic EL element side substrate of the present invention is not particularly limited as long as it has the above-described lower electrode layer, organic EL layer, and upper transparent electrode layer, and a necessary configuration is appropriately selected. Can be added.

(A) TFT
The organic EL element side substrate used in the present invention usually has a TFT (Thin Film Transistor) for controlling a current flowing in the organic EL element constituting the pixel.
As illustrated in FIG. 1 and the like, the TFT 75 is arranged and formed for each pixel on the substrate. Further, although not shown in the figure, a gate line, a signal line, and a power supply line are connected to each TFT circuit.

  As for the specific structure and forming method of the TFT, known structures can be used as the structure and forming method of the TFT used in the organic EL display device, and thus description thereof is omitted here.

(B) First Insulating Layer and Second Insulating Layer As shown in FIG. 1 and the like, the organic EL element side substrate 70 used in the present invention usually has a first insulating layer 77 formed on a TFT 75. In addition, the second insulating layer 91 is formed on the substrate in order to prevent the lower electrode layer 81 and the upper transparent electrode layer 85 from coming into direct contact.

  The pattern shape of the second insulating layer can be generally linear, and a pattern having, for example, a matrix or stripe-shaped opening can be formed according to the use of the organic EL display device or the like.

  As a material for forming the first insulating layer and the second insulating layer, for example, a photocurable resin such as a photosensitive polyimide resin or an acrylic resin, a thermosetting resin, an inorganic material, or the like can be used.

  Examples of a method for forming the first insulating layer and the second insulating layer include a method in which the above material is applied and patterned by a photolithography method. Also, a printing method or the like can be used.

(C) Sealing layer The organic EL element side substrate used in the present invention may have a sealing layer.
As shown in FIG. 5, the sealing layer 95 is formed in a portion other than the contact portion with the connection electrode layer 14 b on the upper transparent electrode layer 85 (hereinafter, sometimes referred to as a non-contact portion). The The sealing layer 95 is provided as a protective layer that blocks water vapor and oxygen from reaching the organic EL layer 83.

  The sealing layer is not particularly limited as long as it can exhibit a barrier property against water vapor and oxygen and is transparent. For example, a transparent inorganic film, a transparent resin film, an organic-inorganic hybrid film, etc. Is used. Among these, a transparent inorganic film is preferable because of its high barrier property.

  Examples of the material for forming the transparent inorganic film suitably used as the sealing layer include oxides such as aluminum oxide, silicon oxide, and magnesium oxide; nitrides such as silicon nitride; nitride oxides such as silicon nitride oxide; Used. In particular, silicon nitride oxide is preferable because pinholes hardly occur and gas barrier properties are high.

  The sealing layer may be a single layer or a multilayer. For example, when the sealing layer is a multilayer in which a plurality of silicon nitride oxide films are stacked, the barrier property can be further improved. Moreover, when a sealing layer is a multilayer, you may use a different material for each layer, respectively.

  The thickness of the sealing layer may be appropriately determined according to the type of the sealing layer forming material used. Usually, it is about 5 nm to 5 μm. If the sealing layer is too thin, the barrier property tends to be insufficient, and if the sealing layer is too thick, a phenomenon such as cracking due to film stress of the thin film tends to occur.

  When the sealing layer is a transparent inorganic film, the method for forming the transparent inorganic film is not particularly limited as long as it is a film forming method that can be formed in a vacuum state. For example, sputtering, ion plating And vacuum deposition methods such as electron beam (EB) deposition and resistance heating, atomic layer epitaxy (ALE), laser ablation, and chemical vapor deposition (CVD). Among these, the sputtering method, the ion plating method, and the CVD method are preferably used from the viewpoint of productivity.

  As a method of forming the sealing layer in a pattern on the non-contact portion described above, for example, a method of patterning by a photolithography method after forming a thin film of the sealing layer is preferably used.

(4) Method for Forming Organic EL Element Side Substrate As a method for forming the organic EL element side substrate used in the present invention, a method known as a method for forming an organic EL element side substrate used in a general organic EL display device is used. Since it can be used, description here is omitted.

3. Other Configurations The organic EL display device of the present invention is not particularly limited as long as it has a color filter and an organic EL element side substrate. If necessary, a configuration other than the above is appropriately selected and added. Can do.
Hereinafter, such a configuration will be described.

(1) Adhesive Layer The organic EL display device of the present invention may have an adhesive layer. As shown in FIG. 1 and the like, the adhesive layer 99 is disposed so as to fill a space between the color filter 10 and the organic EL element side substrate 70, and is used for bonding the two together.
The adhesive layer is not particularly limited as long as it is transparent, has adhesive strength, and has curability. As a material for forming such an adhesive layer, for example, a thermosetting adhesive or a photocurable adhesive can be cited as a preferred example. Usually, a type that does not require a solvent is preferable. Also, a film-like adhesive sheet type may be used. Specific examples include epoxy-based, acrylic-based, polyimide-based, and synthetic rubber-based adhesives and adhesive sheets.

(2) Sealant The organic EL display device of the present invention may have a sealant. A sealing agent is arrange | positioned at the outer peripheral part of the color filter mentioned above and an organic EL element side board | substrate, and seals an organic EL display apparatus. In the case of using a sealing agent, the gap is usually left between the color filter and the organic EL element side substrate, and sealing is performed in an inert gas atmosphere such as nitrogen. In this case, a water capturing agent such as barium oxide may be provided in the hollow interior of the organic EL display device.
Since the sealing agent and the sealing method using the same can be the same as those used in a general organic EL display device, description thereof is omitted here.

(3) Wiring The organic EL display device of the present invention is usually provided with a wiring connecting the power source and the organic EL display device.
For example, as shown in FIG. 1 and the like, the wiring form from the power source is a wiring 201 from one pole of the power source P to each TFT 75, and a wiring 202 from the other pole of the power source P to the upper transparent electrode layer 85. -203 and wirings 202-204 extending from the other pole of the power source P to the auxiliary electrode layer 14 are configured. The wiring circuit for causing the organic EL element 80 to emit light is the wiring 201 and the wiring 202-203, and the wiring circuit for releasing the current on the TFT side to the auxiliary electrode layer 13 on the color filter side to prevent a voltage drop is the wiring 201. And wirings 204-202.
Since the wiring used in the present invention can be the same as that used in a general organic EL display device, description thereof is omitted here.

III. Manufacturing Method of Organic EL Display Device As a manufacturing method of the organic EL display device of the present invention, since a known method can be used as a general manufacturing method of an organic EL display device, description thereof is omitted here.

IV. Application Examples of the application of the organic EL display device of the present invention include a large display.

B. Color filter for organic EL display device The color filter for organic EL display device of the present invention includes a transparent substrate, a low reflection layer having an opening formed on the transparent substrate, and the low reflection layer on the transparent substrate. An auxiliary electrode layer having a colored layer formed in the opening, a metal electrode layer formed on the low-reflection layer, and a connection electrode layer formed on the colored layer and electrically connected to the metal electrode layer It is characterized by providing.

  Examples of the color filter for an organic EL display device of the present invention include, for example, FIGS. 8A and 8B described in the above-mentioned section “A. Organic EL display device”. .

According to the present invention, by having the auxiliary electrode layer, when used in the organic EL display device, the current from the organic EL element side substrate side is guided to the color filter side for the organic EL display device through the auxiliary electrode layer. Since it can be missed, it can be set as the color filter for organic EL display devices which can prevent the brightness nonuniformity generation.
Further, according to the present invention, since the connection electrode layer is formed on the colored layer having a relatively large area, the conductive area of the connection electrode layer and the upper transparent electrode layer is increased when used in the organic EL display device. Therefore, the current can be easily released from the organic EL element side substrate side to the color filter side, so that the above-described luminance unevenness can be suitably prevented. it can.
Further, according to the present invention, the connection electrode layer is formed on the colored layer and is in contact with the upper transparent electrode layer, so that when used in an organic EL display device, the colored layer is used. The connection electrode layer and the upper surface transparent electrode layer can be brought into contact with each other, and, for example, other members for contacting the connection electrode layer and the upper surface transparent electrode layer such as pillars are not required. Therefore, the number of manufacturing steps of the color filter for organic EL display devices can be reduced, and the color filter for organic EL display devices with good productivity can be obtained.

  The details of the color filter for the organic EL display device of the present invention are the same as those described in the above-mentioned section “A. Organic EL display device II. Each configuration of organic EL display device 1. Color filter”. Since it can do, description here is abbreviate | omitted.

  The organic EL display device in which the color filter for the organic EL display device of the present invention is used can be the same as that described in the above-mentioned section “A. Organic EL display device”. Omitted.

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

Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples.
[Example 1]
(Preparation of transparent substrate)
A glass substrate having a size of 1500 mm × 1850 mm and a thickness of 0.7 mm was prepared as a transparent substrate.

(Adjustment of composition for forming low reflection layer)
First, 63 parts by mass of methyl methacrylate (MMA), 12 parts by mass of acrylic acid (AA), 6 parts by mass of 2-hydroxyethyl methacrylate (HEMA), and 88 parts by mass of diethylene glycol dimethyl ether (DMDG) in the polymerization tank. After the parts were charged, stirred and dissolved, 7 parts by mass of 2,2′-azobis (2-methylbutyronitrile) was added and dissolved uniformly.
Then, it stirred at 85 degreeC under nitrogen stream for 2 hours, and also was made to react at 100 degreeC for 1 hour.
Further, 7 parts by mass of glycidyl methacrylate (GMA), 0.4 parts by mass of triethylamine, and 0.2 parts by mass of hydroquinone were added to the obtained solution, and the mixture was stirred at 100 ° C. for 5 hours to obtain a copolymer resin solution ( A solid content of 50%) was obtained.

Next, the following materials were stirred and mixed at room temperature to prepare a curable resin composition A having the following composition.
<Composition of curable resin composition A>
-Copolymer resin solution (solid content 50%) ... 16 parts by mass-Dipentaerythritol pentaacrylate (Sartomer SR399)
... 24 parts by mass · Ortho-cresol novolac type epoxy resin (Epico Shell Epoxy Epicoat 180S70) · 4 parts by mass · 2-methyl-1- (4-methylthiophenyl) -2-morpholinopropan-1-one
... 4 parts by mass, diethylene glycol dimethyl ether ... 52 parts by mass

Next, the following components were mixed and sufficiently dispersed with a sand mill to prepare a black pigment dispersion.
<Composition of black pigment dispersion>
Black pigment (Mitsubishi Chemical Corporation # 2600) 20 parts by mass Polymer dispersion (Bic Chemie Japan, Ltd. Disperbyk 111)
... 16 parts by mass, solvent (diethylene glycol dimethyl ether) ... 64 parts by mass

Thereafter, the following components were mixed sufficiently to obtain a composition for forming a low reflection layer.
<Composition of composition for forming low reflection layer>
-Black pigment dispersion liquid: 50 parts by mass-Curable resin composition A: 20 parts by mass-Diethylene glycol dimethyl ether: 30 parts by mass

(Formation of low reflection layer)
Next, the obtained composition for forming a low reflection layer was applied to a transparent substrate, patterned by photolithography, and then baked to form a low reflection layer.

(Formation of colored layer)
Next, a red colored layer forming composition, a green colored layer forming composition, and a blue colored layer forming composition having the following compositions were prepared.

<Red colored layer forming composition>
・ C. I. Pigment Red 254 ... 10 parts by mass, polysulfonic acid type polymer dispersant ... 8 parts by mass, the curable resin composition A ... 15 parts by mass, 3-methoxybutyl acetate ... 67 parts by mass

<Green colored layer forming composition>
・ C. I. Pigment Green 58: 10 parts by mass / C.I. I. Pigment Yellow 138 3 parts by mass, polysulfonic acid type polymer dispersant 8 parts by mass, the curable resin composition A 12 parts by mass, 3-methoxybutyl acetate 67 parts by mass

<Blue colored layer forming composition>
・ C. I. Pigment Blue 1 ... 5 parts by mass, polysulfonic acid type polymer dispersant ... 3 parts by mass, the curable resin composition A ... 25 parts by mass, 3-methoxybutyl acetate ... 67 parts by mass

<White colored layer forming composition>
-The said curable resin composition A ... 33 mass parts-3-methoxybutyl acetate ... 67 mass parts

Next, a red colored layer forming composition was applied by spin coating so as to cover the low reflective layer on the glass substrate, patterned by photolithography, and baked to form a red colored layer.
Then, the green colored layer and the blue colored layer were formed by the same operation using the green colored layer forming composition and the blue colored layer forming composition. As a result, a colored layer in which a red colored layer, a green colored layer, and a blue colored layer were arranged was formed.
The thickness of the colored layer was 4.5 μm for the red colored layer, 1.5 μm for the green colored layer, 1.5 μm for the blue colored layer, and 1.5 μm for the white colored layer.

(Formation of metal electrode layer)
Next, an Ag thin film having a thickness of 0.5 μm is formed on the low reflection layer and the colored layer by vapor deposition, and then patterned by photolithography to form a metal electrode on the non-pixel area where the low reflection layer is formed. A layer was formed.

(Formation of connection electrode layer)
Next, an ITO film having a thickness of 100 nm was formed on the entire surface of the transparent substrate on the metal electrode layer side by a sputtering method to obtain a connection electrode layer.

(Annealing treatment)
Thereafter, annealing was performed for 40 minutes at 150 ° C.
The color filter was produced by the above process.

(Production of organic EL display device)
An organic EL element side substrate including a white light-emitting light source was manufactured as follows as an EL element side substrate for manufacturing an organic EL display device facing the color filter substrate.
First, a glass substrate (Corning 1737 glass) having a size of 1500 mm × 1850 mm and a thickness of 0.7 mm was prepared as a substrate. A thin film transistor circuit was produced on this substrate according to a conventional method.
Next, a lower electrode layer made of aluminum is formed on the surface of the substrate on the thin film transistor circuit side so as to correspond to the colored layers of each color of the color filter substrate, and an insulating layer made of polyimide is formed between the lower electrode layers. (Partition wall) was formed. Next, a white light emitting organic EL element (laminated structure of a hole injection layer, a white light emitting layer, and an electron injection layer) is formed in the gap between the insulating layers (partition walls), and indium tin oxide (ITO) is formed thereon. An upper transparent electrode layer was formed.
Then, the colored layer side surface of the color filter and the organic EL element side surface of the organic EL element side substrate having the upper surface transparent electrode layer are opposed to each other so that the connection electrode layer and the upper surface transparent electrode layer are electrically connected, An organic EL display device was produced by bonding through an adhesive (NT-01UV manufactured by Nitto Denko Corporation).

[Example 2]
The low reflection layer was formed in the same manner as in Example 1.
Then, the colored layer was formed by changing the film thickness of Example 1 and the colored layer. The thickness of each colored layer was a red colored layer 2.5 μm, a green colored layer 2.5 μm, a blue colored layer 2.5 μm, and a white colored layer 2.5 μm.
Next, an Ag thin film having a thickness of 0.5 μm is formed on the low reflection layer and the colored layer by vapor deposition, and then patterned by photolithography to form a metal electrode on the non-pixel area where the low reflection layer is formed. A layer was formed. In addition, a color connection layer is formed integrally with the metal electrode layer on the colored layer that overlaps the low reflection layer in plan view, and the connection electrode layer opening that overlaps the opening of the low reflection layer in plan view. Got.
Thereafter, an organic EL display device was obtained by the same method for producing an organic EL display device as in Example 1.

[Example 3]
A colored layer was formed in the same manner as in Example 2.

(Formation of overcoat layer)
On the substrate on which the colored layer was formed, the curable resin composition A was applied by a spin coating method and dried to form a coating film having a dry coating film thickness of 2 μm.
A photomask is placed at a distance of 100 μm from the coating film of the curable resin composition A, and an ultraviolet ray is applied only to the region corresponding to the protective layer forming region using a 2.0 kW ultrahigh pressure mercury lamp by a proximity aligner for 10 seconds. Irradiated. Subsequently, it was immersed in 0.05 wt% potassium hydroxide aqueous solution (liquid temperature 23 degreeC) for 1 minute, and alkali image development was carried out, and only the uncured part of the coating film of curable resin composition was removed. Thereafter, the substrate was left to stand in an atmosphere of 200 ° C. for 30 minutes to perform heat treatment to form an overcoat layer.

(Formation of metal connection electrode layer)
Next, an Ag thin film having a thickness of 0.5 μm is formed on the overcoat layer by vapor deposition, and then patterned by photolithography to integrate the metal electrode layer and the metal connection electrode layer in the same manner as in Example 2. To obtain a color filter.
Thereafter, an organic EL display device was obtained by the same method for producing an organic EL display device as in Example 1.

[Example 4]
The low reflection layer was formed in the same manner as in Example 1.
Next, the film thickness of Example 1 and the colored layer was changed to form a red colored layer, a green colored layer, and a blue colored layer. Then, the photomask of the white colored layer was changed, and the white colored layer was formed on the white colored layer forming part and the red colored layer. The thickness of each layer was set to 4.8 μm, a green colored layer 2.5 μm, a blue colored layer 2.5 μm, and a white colored layer 2.5 μm. Thereafter, in the same manner as in Example 1, formation of a metal electrode layer, formation of a connection electrode layer, and annealing treatment were performed to obtain a color filter.
Thereafter, an organic EL display device was obtained by the same method for producing an organic EL display device as in Example 1.

[Example 5]
After forming the colored layer by the same method as in Example 3, the metal filter layer was formed, the connection electrode layer was formed, and the annealing process was performed in the same manner as in Example 1 to obtain a color filter.
Thereafter, an organic EL display device was obtained by the same method for producing an organic EL display device as in Example 1.

[Comparative Example 1]
A colored layer was formed in the same manner as in Example 2. Thereafter, convex columns were formed at predetermined locations in the non-pixel area using NN780 (manufactured by JSR) using a photolithography method to obtain a color filter. The width of the base of the convex column was 40 μm, the width of the top was 20 μm, the height was 20 μm, and the taper angle from the base to the top was 70 °.
Thereafter, an organic EL display device was obtained by the same method for producing an organic EL display device as in Example 1.

[Comparative Example 2]
A colored layer was formed in the same manner as in Example 2, and then an overcoat was formed in the same manner as in Example 3. Next, a metal electrode layer was formed by the same method as in Example 1, and then a convex column was formed by the same method as in Comparative Example 1. Finally, the connection electrode layer was formed and annealed by the same method as in Example 1 to obtain a color filter.
Thereafter, an organic EL display device was obtained by the same method for producing an organic EL display device as in Example 1.

[Evaluation]
(Evaluation method of luminance unevenness)
About the said organic EL display apparatus, when carrying out white display, the difference ((DELTA) Y) of the brightness | luminance of the center and outer periphery of a display part was performed using the luminance meter SR-3AR by Topcon. In Table 1, ΔY was judged to be less than 10%, and ΔY was judged to be 10% or more as x.

(Judgment of number of processes / cost)
The number of steps for manufacturing the color filter was compared based on the number of steps in Comparative Example 2. In Table 1, the cost of the production method having one fewer steps than Comparative Example 2 was marked as ○, and the cost of the production method fewer than two steps was marked as ◎.

(Comprehensive judgment)
When the brightness unevenness evaluation result and the cost judgment result were only ○ or ◎, the overall judgment was made ○ and the judgment was made.

10 Color filter (Color filter for organic EL display)
DESCRIPTION OF SYMBOLS 11 ... Transparent substrate 12 ... Low reflection layer 13 ... Colored layer 14 ... Auxiliary electrode layer 14a ... Metal electrode layer 14b ... Connection electrode layer 70 ... Organic EL element side substrate 71 ... Substrate 80 ... Organic EL element 81 ... Bottom electrode layer 83 ... Organic EL layer 85 ... Upper transparent electrode layer 100 ... Organic EL display device X ... Opening of low reflection layer

Claims (6)

A transparent substrate, a low reflective layer having an opening formed on the transparent substrate, a colored layer formed in the opening of the low reflective layer on the transparent substrate, and a metal formed on the low reflective layer A color filter comprising an auxiliary electrode layer having an electrode layer and a connection electrode layer formed on the colored layer and electrically connected to the metal electrode layer;
A substrate, and a lower electrode layer formed on the substrate, an organic electroluminescence layer formed on the lower electrode layer and including a light emitting layer, and an upper transparent electrode layer formed on the organic electroluminescence layer An organic electroluminescence element side substrate comprising an organic electroluminescence element;
Have
The colored layer side surface of the color filter and the organic electroluminescence element side surface of the organic electroluminescence element side substrate are arranged to face each other,
The connection electrode layer and the upper surface transparent electrode layer are in contact with each other so as to conduct ,
At least a part of the colored layer is a thick film part thicker than the total thickness of the low reflection layer and the metal electrode layer,
The organic electroluminescence display device , wherein the connection electrode layer is in contact with the upper transparent electrode layer in a region overlapping the thick film portion of the colored layer in plan view .   The colored layer has a plurality of colored layers including a white colored layer, and is composed of a thick colored layer and a thin colored layer, and the thick colored layer comprises the white colored layer and the other colored layers. 2. A laminated body of one colored layer, wherein the connection electrode layer formed on the thick colored layer and the upper transparent electrode layer are in contact with each other so as to be conductive. The organic electroluminescence display device described in 1.   The connection electrode layer is formed on the colored layer overlapping in plan view with the low reflection layer, and has an opening for connection electrode layer overlapping in plan view with the opening of the low reflection layer. Item 3. The organic electroluminescence display device according to item 1 or 2. A transparent substrate;
A low reflection layer formed on the transparent substrate and having an opening;
A colored layer formed in the opening of the low reflective layer on the transparent substrate;
A metal electrode layer formed on the low reflective layer, and an auxiliary electrode layer having a connection electrode layer formed on the colored layer and electrically connected to the metal electrode layer ,
At least a part of the colored layer is a thick film part thicker than the total thickness of the low reflection layer and the metal electrode layer,
It said transparent substrate said connecting electrode layers are formed the organic electroluminescent display device for a color filter according to claim Rukoto on the surface opposite to the thick film portion of the colored layer.   The colored layer has a plurality of colored layers including a white colored layer, and is composed of a thick colored layer and a thin colored layer, and the thick colored layer comprises the white colored layer and the other colored layers. 5. A laminated body of one colored layer, wherein the connection electrode layer formed on the thick colored layer and the upper transparent electrode layer are in contact with each other so as to be conductive. A color filter for an organic electroluminescence display device according to 1.   The connection electrode layer is formed on the colored layer overlapping in plan view with the low reflection layer, and has an opening for connection electrode layer overlapping in plan view with the opening of the low reflection layer. Item 6. The color filter for an organic electroluminescence display device according to Item 4 or 5.

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