JP6152674B2 - Organic electroluminescence display device - Google Patents

Description

  The present invention relates to an organic electroluminescence display device that prevents generation of luminance unevenness, parallax color mixing, and the like and has 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 method, a current flowing in an organic EL element arranged for each pixel is converted into a TFT (Thin in a drive circuit provided for each organic EL element).
It is controlled by Film Transistor).

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.

By the way, in a top emission type organic EL display device, conventionally, a transparent substrate and a color filter including a colored layer formed on the transparent substrate and a light shielding portion, and an organic EL element formed on the substrate and the substrate are provided. The organic EL element side substrate is provided, and a configuration is adopted in which the colored layer side surface of the color filter and the organic EL element side surface of the organic EL element side substrate are opposed to each other. In such an organic EL display device, one pixel of the organic EL display device is arranged to include one organic EL element and one colored layer, and light from one organic EL element is 1 By transmitting through one colored layer, display with the one pixel is possible. In addition, light from the organic EL element usually travels straight inside the organic EL display device.
However, in such an organic EL display device, since a predetermined gap is usually provided between the organic EL element and the colored layer, a part of light from the organic EL element is organic EL display device. Seeing the organic EL display device from an oblique view as it is diffracted by the colored layer and the corners of the light-shielding portion while traveling straight through the interior, and the diffracted light is transmitted through the colored layer disposed in other adjacent pixels. There is a problem in that parallax color mixing and light leakage (hereinafter sometimes referred to as parallax color mixing) occur due to the light of the organic EL element being transmitted through a colored layer disposed in another adjacent pixel. is there.

  The present invention has been made in view of the above circumstances, and provides an organic EL display device which can prevent luminance unevenness and parallax color mixing and the like and has good productivity, and a color filter for the organic EL display device used therefor The main purpose is to do.

  In order to solve the above-described problems, the present invention provides a transparent substrate, a light-shielding portion formed on the transparent substrate and having an opening, a colored layer formed in the opening of the light-shielding portion on the transparent substrate, and the light-shielding And a transparent electrode layer formed on the entire surface of the colored layer, and a metal electrode layer formed on the light shielding portion, and a color filter in which the height of the light shielding portion is higher than the height of the colored layer; An organic EL device comprising: a substrate; a bottom electrode layer formed on the substrate; an organic EL layer formed on the bottom electrode layer including a light emitting layer; and a top transparent electrode layer formed on the organic EL layer. An organic EL element side substrate including an EL element, the light shielding portion side surface of the color filter and the organic EL element side surface of the organic EL element side substrate disposed so as to face each other, and the metal electrode Layers and top surface An organic EL display device, characterized in that the transparent electrode layer is in contact to conduct.

According to the present invention, using the color filter in which the height of the light shielding portion is higher than the height of the colored layer, the metal electrode layer formed on the light shielding portion and the upper transparent electrode layer are in contact with each other. Therefore, it is possible to suitably suppress the occurrence of luminance unevenness, parallax color mixing, and the like, and an organic EL display device with good productivity can be obtained.
In addition, according to the present invention, since the transparent electrode layer is formed on the entire surface of the light shielding portion and the colored layer, the current guided to the color filter side through the metal electrode layer is evenly released to the entire surface of the color filter. Therefore, the difference in voltage drop between the peripheral portion and the central portion of the organic EL display device can be further reduced, so that an organic EL display device capable of displaying with less luminance unevenness can be obtained.

  In the said invention, it is preferable that the said light-shielding part is comprised by the laminated body of the colored layer for multiple colors light-shielding part. This is because the light-shielding portion having a desired height can be formed simultaneously with the colored layer, so that the number of manufacturing steps can be reduced, and an organic EL display device with high productivity can be obtained.

  The present invention provides a transparent substrate, a light shielding part formed on the transparent substrate and having an opening, a colored layer formed in the opening of the light shielding part on the transparent substrate, the light shielding part and the colored layer An organic EL display comprising: a transparent electrode layer formed on the entire upper surface; and a metal electrode layer formed on the light shielding portion, wherein the light shielding portion has a height higher than that of the colored layer. A color filter for an apparatus is provided.

According to the present invention, the height of the light-shielding portion is higher than the height of the colored layer, and the metal electrode layer formed on the light-shielding portion has a metal electrode when used in an organic EL display device. Since the electrode layer can be brought into contact with the upper surface transparent electrode layer of the organic EL element side substrate, it is possible to suitably suppress the occurrence of uneven brightness and color mixture of parallax, and an organic product with good productivity. A color filter for an EL display device can be obtained.
Further, according to the present invention, since the transparent electrode layer is formed on the entire surface of the light shielding portion and the colored layer, when used in an organic EL display device, the transparent electrode layer is led to the color filter side through the metal electrode layer. Therefore, the difference in voltage drop between the peripheral portion and the central portion of the organic EL display device can be further reduced, so that display with less luminance unevenness can be achieved.

  In the said invention, it is preferable that the said light-shielding part is comprised by the laminated body of the colored layer for multiple colors light-shielding part. This is because the light-shielding portion having a desired height can be formed simultaneously with the colored layer, so that the number of manufacturing steps can be reduced, and an organic EL display device with high productivity can be obtained.

  The organic EL display device of the present invention can prevent luminance unevenness, parallax color mixing, and the like, and has the effect of being excellent in productivity. In addition, the color filter for an organic EL display device of the present invention can provide the above-described organic EL display device, and has an effect that productivity is good.

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 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. 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 light shielding portion formed on the transparent substrate and having an opening, a colored layer formed in the opening of the light shielding portion on the transparent substrate, A color filter comprising a light shielding part, a transparent electrode layer formed on the entire surface of the colored layer, and a metal electrode layer formed on the light shielding part, wherein the height of the light shielding part is higher than the height of the colored layer And a substrate, 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 a top transparent electrode layer formed on the organic EL layer An organic EL element side substrate including an organic EL element, and is arranged so that the light shielding part side surface of the color filter faces the organic EL element side surface of the organic EL element side substrate, and the metal Electrode layer and The upper transparent electrode layer is in contact with the upper transparent electrode layer so as to be conductive.

  In the present invention, “the metal electrode layer and the upper surface transparent electrode layer are in contact with each other” means not only an embodiment in which the metal electrode layer and the upper surface transparent electrode layer are in direct contact, but also a conductive adhesive. A mode in which the metal electrode layer and the upper surface transparent electrode layer are in contact with each other through a conductive layer such as a layer or a transparent electrode layer is included.

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 is formed in a transparent substrate 11, a light shielding portion 12 having an opening formed on the transparent substrate 11, and an opening of the light shielding portion 12 on the transparent substrate 11. The colored layer 13 (in FIG. 1, the red colored layer 13R, the green colored layer 13G, the blue colored layer 13B, the white colored layer 13W), the transparent electrode layer 14 formed on the entire surface of the light shielding portion 12 and the colored layer 13, and A color filter 10 including a metal electrode layer 15 formed on the light shielding portion 12, the height of the light shielding portion 12 being higher than the height of the colored layer 13, a substrate 71, and a lower electrode layer formed on the substrate 71 81, an organic EL element-side substrate 70 comprising an organic EL element 80 having an organic EL layer 83 formed on the lower electrode layer 81 and including a light emitting layer, and an upper transparent electrode layer 85 formed on the organic EL layer 83; The The light shielding portion 12 side surface of the color filter 10 and the organic EL element side substrate 70 are disposed so that the surface of the organic EL element side substrate 70 faces each other, and the metal electrode layer 15 and the upper transparent electrode layer 85 are electrically connected. It is characterized by being in contact.
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 metal electrode layer 15.
In FIG. 1, the light shielding portion 12 of the color filter 10 is composed of a single light shielding layer 121, and a metal electrode layer 15 having a line width narrower than the line width of the light shielding portion 12 is partially formed on the light shielding portion 12. It shows an example that is formed. Further, FIG. 1 shows an example in which the metal electrode layer 15 and the upper surface transparent electrode layer 85 are in contact with each other through the transparent electrode layer 14.

2 to 7 are schematic cross-sectional views showing other examples of the organic EL display device of the present invention.
FIG. 2 shows an example in which a metal electrode layer 15 having a line width similar to the line width of the light shielding portion 12 is formed on the entire surface of the color filter 10 on the light shielding portion 12. Further, an example in which the organic EL element side substrate 70 has a sealing layer 95 is shown.
In FIG. 3, the light shielding portion 12 of the color filter 10 includes a plurality of light shielding portion colored layers 122 (in FIG. 3, the light shielding portion red colored layer 122R, the light shielding portion green colored layer 122G, and the light shielding portion blue colored layer 122B). It shows about an example composed of the laminated body.
4 and 5 show an example in which the light shielding portion 12 of the color filter 10 is formed of a laminated body of the light shielding layer 121 and the light shielding portion coloring layer 122. FIG. In FIG. 4, the light-shielding portion coloring layer 122 laminated with the light-shielding layer 121 is one layer, and the two colors of the light-shielding portion coloring layer 122 (two colors of 122R, 122G, 122B, and 122W) are on the same plane. FIG. 5 shows an example in which the light shielding portion colored layer 122 laminated with the light shielding layer 121 is a plurality of layers (122R, 122G).
FIG. 6 shows an example in which the color filter 10 has an overcoat layer 16 formed so as to cover the light shielding portion 12 and the colored layer 13. In this case, the metal electrode layer 15 is formed on the light shielding portion 12 via the overcoat layer 16.
FIG. 7 shows an example in which the metal electrode layer 15 is formed on the transparent electrode layer 14 and the metal electrode layer 15 and the upper surface transparent electrode layer 85 are in direct contact with each other.
2 to 7 can be the same as the reference numerals described in FIG. 1, and thus the description thereof is omitted here.

  According to the present invention, using the color filter in which the height of the light shielding portion is higher than the height of the colored layer, the metal electrode layer formed on the light shielding portion and the upper transparent electrode layer are in contact with each other. Therefore, it is possible to suitably suppress the occurrence of luminance unevenness, parallax color mixing, and the like, and an organic EL display device with good productivity can be obtained.

More specifically, according to the present invention, since the metal electrode layer and the upper transparent electrode layer are in contact with each other, the current from the organic EL element side substrate is filtered through the metal electrode layer. Therefore, it is possible to suppress the occurrence of luminance unevenness.
In addition, according to the present invention, since the metal electrode layer is formed on the light-shielding portion having a relatively large area, the conductive area of the metal electrode layer and the upper surface transparent electrode layer can be increased. Generation | occurrence | production of can be suppressed suitably.
Further, according to the present invention, since the height of the light shielding portion is higher than the height of the colored layer, in the organic EL display device, the transparent substrate, the substrate, and the substrate are arranged by making the color filter and the organic EL element side substrate face each other. Since the organic EL element can be arranged in a space surrounded by the light shielding portion, diffracted light generated inside the organic EL display device can be absorbed by the light shielding portion, and when the organic EL display device is viewed from an oblique direction. Since it is possible to prevent light from the organic EL element from passing through a colored layer disposed in another adjacent pixel, it is possible to prevent parallax color mixing and the like.
Further, according to the present invention, since the metal electrode layer is brought into contact with the upper surface transparent electrode layer using the light shielding portion, for example, the metal electrode layer such as a column portion and the upper surface transparent electrode layer are electrically connected. Since other members for contact are not required, 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. Moreover, since it is not necessary to form the other member mentioned above on the organic electroluminescent element side board | substrate, the fall of the yield of an organic electroluminescent display apparatus can be suppressed.

In addition, according to the present invention, since the transparent electrode layer is formed on the entire surface of the light shielding portion and the colored layer, the current guided to the color filter side through the metal electrode layer is evenly released to the entire surface of the color filter. Therefore, the difference in voltage drop between the peripheral portion and the central portion of the organic EL display device can be further reduced, so that an organic EL display device capable of displaying with less luminance unevenness can be obtained.
Moreover, according to this invention, since the said transparent electrode layer is formed, since a gas barrier property can be provided to a color filter, deterioration of an organic EL element can be suppressed.
Hereinafter, the details of the organic EL display device of the present invention will be described.

I. Color filter The color filter used in the present invention comprises a transparent substrate, a light shielding part, a colored layer, and a metal electrode layer, and is characterized in that the height of the light shielding part is higher than the height of the colored layer. To do.

Examples of such color filter modes include the color filter modes shown in FIGS. 8A and 8B to FIG. 14.
FIG. 8A is a schematic plan view showing an example of the color filter 10 in FIG. 1, and FIG. 8B is a cross-sectional view taken along the line AA in FIG. 8A. In FIG. 8A, the transparent electrode layer is omitted for easy description. 9 is a schematic sectional view showing an example of the color filter in FIG. 2, FIG. 10 is a schematic sectional view showing an example of the color filter in FIG. 3, and FIG. 11 shows an example of the color filter in FIG. FIG. 12 is a schematic sectional view showing an example of the color filter in FIG. 5, FIG. 13 is a schematic sectional view showing an example of the color filter in FIG. 6, and FIG. 14 is a color filter in FIG. It is a schematic sectional drawing which shows the example.

  In the present invention, “the height of the light shielding part is higher than the height of the colored layer” means that the height from the light shielding part of the transparent substrate and the colored layer side surface to the upper bottom surface of the light shielding part is the light shielding part of the transparent substrate. It means that it is higher than the height from the part and the colored layer side surface to the upper bottom surface of the colored layer, and that the distance indicated by p in FIG. 8B is larger than the distance indicated by q.

1. Light-shielding part The light-shielding part used for this invention is formed on a transparent substrate, has an opening part, The height is higher than the height of a colored layer, It is characterized by the above-mentioned. Further, the light shielding portion is usually provided so that its height is higher than the height of all the colored layers formed in the color filter.

  The light shielding part is not particularly limited as long as it has a desired light shielding property, its height is higher than that of the colored layer, and a metal electrode layer can be formed on the surface thereof. As such a light shielding part, for example, as shown in FIG. 8 or the like, it may be composed of a single light shielding layer 121. For example, as shown in FIGS. The layer 122 may be included. In this case, as shown in FIG. 10, it may be composed of a laminated body of colored layers 122 for light-shielding portions of multiple colors. As shown in FIGS. 11 and 12, for the light-shielding layer 121 and the light-shielding portion. It may be composed of a laminate of the colored layers 122. In the case where the light shielding part is a laminate of the light shielding layer and the colored layer for the light shielding part, the light shielding layer and the colored layer for the light shielding part may be laminated in this order on the transparent substrate. You may laminate | stack in order of the colored layer and the light shielding layer. In the present invention, it is particularly preferable that the light shielding part is composed of a laminate of colored layers for light shielding parts of a plurality of colors. When the light-shielding part is composed of a laminate of a plurality of colored layers for the light-shielding part, it is not necessary to form the light-shielding layer, and the light-shielding part having a desired height is formed simultaneously with the colored layer. This is because the number of manufacturing steps can be reduced and an organic EL display device with high productivity can be obtained.

The height of the light-shielding part is not particularly limited as long as it can be formed higher than the height of the colored layer and can be appropriately selected according to the use of the organic EL display device. Further, the difference between the height of the light shielding portion and the height of the colored layer can be appropriately selected according to the use of the organic EL display device, and is not particularly limited, but specifically, 0.5 μm or more, It is preferably 1 μm or more, particularly 2 μm or more. Further, the height of the light shielding part is preferably 5 μm or less, more preferably 4 μm or less, and particularly preferably 3 μm or less. When the difference in height is less than the above range, the colored layer and the upper surface transparent electrode layer can easily come into contact with each other, so that foreign matter adhering to the surface of the colored layer or between the color filter and the organic EL element side substrate can be obtained. This is because the foreign matter present in the electrode tends to come into contact with the upper transparent electrode layer, and the organic EL element may be easily deteriorated. Further, when the height difference exceeds the above range, it may be difficult to form the light shielding portion itself or the colored layer itself.
The difference in height refers to the distance indicated by r in FIG.

  The specific height of the light-shielding portion can be appropriately selected according to the use of the organic EL display device, and is not particularly limited, but it is within the range of 1 μm to 8 μm, particularly within the range of 1.2 μm to 6 μm. In particular, it is preferably within a range of 1.3 μm to 5 μm. This is because if the height of the light shielding portion is less than the above value, it may be difficult to set the difference in height from the colored layer to a desired value. This is because if it exceeds, it may be difficult to form the light shielding portion itself.

The OD value of the light shielding portion is not particularly limited as long as parallax color mixing in the organic EL display device can be prevented.
The specific OD value of the light-shielding part is preferably in the range of 1 to 8, in particular in the range of 2 to 6, particularly in the range of 3 to 5. This is because when the OD value is less than the above value, it may be difficult to sufficiently prevent parallax color mixing and the like, and when the OD value exceeds the above value, the light shielding portion itself is formed. This may be difficult. In addition, a well-known method can be used as a measuring method of OD value of a light-shielding part, for example, it can measure with a Macbeth reflection densitometer ("RD-914" by Sakata Inx Corporation).

As the pattern arrangement of the openings of the light shielding part, a known pattern arrangement of pixels of the organic EL display device can be used. For example, known arrangements such as a stripe type, a mosaic type, a triangle type, and a four-pixel arrangement type can be used.
About the area of the opening part of a light-shielding part, since it can select suitably according to the use etc. of the organic electroluminescent display apparatus of this invention, description here is abbreviate | omitted.

  The line width of the light shielding part is not particularly limited as long as the light shielding part having a desired height can be formed on the transparent substrate, and a metal electrode layer to be described later can be formed on the light shielding part. In particular, it is preferably in the range of 12 μm to 100 μm, particularly in the range of 13 μm to 90 μm. When the line width of the light shielding portion is less than the above range, it is difficult to form the light shielding portion itself, or it is difficult to stably form a metal electrode layer having a predetermined line width on the light shielding portion. This is because there is a possibility of becoming.

Next, the material of the light shielding part will be described.
The material of the light shielding part in the present invention is appropriately selected depending on the mode of the light shielding part.
When the light shielding portion is a single light shielding layer, a resin light shielding layer composed of a resin in which a light shielding material such as a black colorant is dispersed or dissolved is preferably used as the light shielding layer. Since a well-known thing can be used about the light-shielding material and resin used for a resin light shielding layer, description here is abbreviate | omitted.
Further, when the light shielding part is a laminate of the light shielding layer and the colored layer for the light shielding part, the light shielding layer may be a metal light shielding layer made of a metal such as chromium in addition to the resin light shielding layer described above. . About the metal used for a metal light shielding layer, since it can be the same as that of the well-known metal used for a light shielding part, description here is abbreviate | omitted.
Further, when the light-shielding part has the light-shielding part colored layer, the material used for the light-shielding part colored layer can be the same as the material of the colored layer described later, and thus the description thereof is omitted here.

  As a method for forming the light shielding part, a known method can be used as a method for forming the light shielding part used in a general color filter. In the present invention, it is particularly preferable to use a photolithography method. Moreover, when the light-shielding part has the colored layer for light-shielding parts, it is preferable to form the colored layer for light-shielding parts in the same step as the colored layer described later.

2. Metal electrode layer The metal electrode layer in this invention is formed on a light-shielding part, and contacts with the upper surface transparent electrode of the organic EL element side board | substrate mentioned later.
Further, such a metal electrode layer is formed along the light shielding portion, and is usually not formed in the opening of the light shielding portion.

  The line width of the metal electrode layer is not particularly limited as long as it can be formed on the light shielding portion. For example, the line width of the metal electrode layer 15 may be smaller than the line width of the light shielding portion 12 as shown in FIGS. 8A and 8B, etc., and the line width of the metal electrode layer 15 may be as shown in FIG. It may be equal to the line width of the light shielding portion 12. In the present invention, the line width of the metal electrode layer is preferably equal to the line width of the light shielding portion. This is because the conductive area of the metal electrode layer and the upper transparent electrode layer can be increased, and thus an organic EL display device that can more suitably prevent occurrence of luminance unevenness can be obtained.

The specific line width of the metal electrode layer can be appropriately selected according to the use of the organic EL display device, and is not particularly limited. Specifically, the line width is 10 μm or more, and particularly within the range of 12 μm to 100 μm. In particular, it is 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 electrical resistance may not be sufficiently small.
Moreover, as an upper limit of the line width of a metal electrode layer, it can be made equivalent to the line width of the light-shielding part formed in a lower layer. This is because when the line width of the metal electrode layer is larger than the line width of the light shielding portion, 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 has a desired conductivity, but it may be in the range of 10 nm to 1000 nm, in particular in the range of 50 nm to 800 nm, particularly in the range of 100 nm to 500 nm. preferable. This is because when the thickness of the metal electrode layer is less than the above range, the resistance of the metal electrode layer may increase. When the thickness of the metal electrode layer exceeds the above range, the formation time of the metal electrode layer is This is because it takes a lot and the manufacturing cost may be high. Moreover, it is because the stress of a metal electrode layer may become large and it may become easy to produce a crack etc.

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 metal electrode layer can be improved.

  As a method for forming such a metal electrode layer, for example, 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 is suitably used.

3. Transparent electrode layer The transparent electrode layer used for this invention is formed in the light-shielding part and the whole surface on a colored layer. The transparent electrode layer is used for evenly releasing the current guided from the organic EL element side substrate to the color filter side through the metal electrode layer to the entire surface of the color filter.
The transparent electrode layer imparts gas barrier properties to the color filter.

  In the present invention, the transparent electrode layer only needs to be formed on the entire surface of the light shielding portion and the colored layer. For example, as illustrated in FIGS. 8A and 8B, the transparent electrode layer is formed on the light shielding portion 12. It may be formed on the metal electrode layer 15, or may be formed between the light shielding portion 12 and the metal electrode layer 15 as illustrated in FIG. 14.

The light transmittance of the transparent electrode layer is not particularly limited as long as light from the light emitting layer of the organic EL layer can be transmitted and desired display can be performed. For example, the average transmittance at 380 nm to 780 nm is 85% to 98%. %, Preferably in the range of 90% to 97%, particularly preferably in the range of 92% to 96%.
The average transmittance can be measured by, for example, an ultraviolet-visible light spectrophotometer UV-3600 manufactured by Shimadzu Corporation.

In addition, the gas barrier property of the transparent electrode layer is not particularly limited as long as the barrier property can be exhibited with respect to gas such as water vapor, oxygen, desorption gas from the constituent members of the color filter. Specifically, the oxygen permeability of the transparent electrode layer (OTR) is 0.3cc ^/ m 2 ^/ day or less, and preferably less inter alia 0.1cc ^/ m 2 ^/ day.
Further, the water vapor transmittance of the transparent electrode layer (WVTR) is 0.1g ^/ m 2 ^/ day or less, and preferably less inter alia 0.05g ^/ m 2 ^/ day.
The oxygen permeability is a value measured using an oxygen gas permeability measuring device (manufactured by MOCON, OX-TRAN 2/20: trade name) under the conditions of a measurement temperature of 23 ° C. and a humidity of 90% Rh. Yes, the water vapor transmission rate is a value measured using a water vapor transmission rate measuring device (manufactured by MOCON, PERMATRAN-W 3/31: trade name) under the conditions of a measurement temperature of 37.8 ° C. and a humidity of 100% Rh. It is.

  The thickness of the transparent electrode layer is not particularly limited as long as desired conductivity and gas barrier properties can be exhibited, but it is within the range of 30 nm to 500 nm, particularly within the range of 40 nm to 450 nm, particularly within the range of 40 nm to 400 nm. It is preferable that If the thickness of the transparent electrode layer is less than the above range, the resistance of the transparent electrode layer may be increased. If the thickness of the transparent electrode layer exceeds the above range, the formation time of the transparent electrode layer is This is because it takes a lot and the manufacturing cost may be high. Moreover, it is because the stress of a transparent electrode layer becomes large and it may become easy to produce a crack etc.

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

  About the formation method of a transparent electrode layer, a well-known method can be used as a formation method of an electrode layer, for example, a vapor deposition method or sputtering method etc. can be mentioned.

4). Colored layer The colored layer used for this invention is formed in the opening part of the light-shielding part on a transparent substrate. In the present invention, it usually has three or more 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.

  About the pattern arrangement | sequence of the colored layer of several colors, since it can be made to be the same as that of the pattern arrangement | sequence of the opening part of the light shielding part mentioned above, description here is abbreviate | omitted.

The height (thickness) of the colored layer is not particularly limited as long as the height (thickness) is lower than the above-described height of the light-shielding portion and can perform a desired color display. It can be appropriately selected according to the use of the organic EL display device. The specific height (thickness) of the colored layer is preferably in the range of 0.5 μm to 5 μm, more preferably in the range of 0.7 μm to 4 μm, and particularly preferably in the range of 1 μm to 3 μm.
This is because if the height (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.

Next, the material of the colored layer will be described.
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.

  As a method for forming a colored layer, a known method can be used as a method for forming a colored layer of a general color filter. In the present invention, among these, the photolithography method can be preferably used.

5. Transparent substrate The transparent substrate used for this invention is used in order to support the light-shielding part, colored layer, and metal electrode layer which were mentioned above.

  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.

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

  For example, as shown in FIG. 13, the color filter 10 used in the present invention may have an overcoat layer 16 formed so as to cover the light shielding portion 12 and the colored layer 13. In this case, the metal electrode layer 15 and the transparent electrode layer 14 formed as necessary are formed on the overcoat layer 16. In the present invention, when the overcoat layer 16 is provided, the surfaces of the light shielding portion 12 and the colored layer 13 can be flattened, and the metal electrode layer 15 can be favorably formed. In addition, intrusion of oxygen, water vapor, or the like from the color filter side into the organic EL display device can be suppressed.

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 light-shielding portion can be flattened. It is preferably within a range of 0.0 μm, more preferably within a range of 0.7 μm to 3.0 μm, and particularly preferably within a 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 surface of the colored layer and the light-shielding portion. For example, a spin coating method, a casting method, a dipping method, a bar coating method, Examples thereof include a blade coating method, a roll coating method, a gravure coating method, a flexographic printing method, and a spray coating method.

7). Color Filter Forming Method The color filter forming method used in the present invention can be a known method as a general color filter forming method, and thus description thereof is omitted here.

II. 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 formed on the lower electrode layer formed on the substrate, the organic EL layer formed on the lower electrode layer, including the light emitting layer, and the organic EL layer. Further, it has an upper transparent electrode layer.

(1) Organic EL layer The organic EL layer used for this invention is formed on the lower surface electrode layer mentioned later, and contains 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.

(A) 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, a white light emitting layer may be included, and a red light emitting layer, a blue light emitting layer, and a green light emitting layer may be used. 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. Further, in the emission spectrum, the ratio of the maximum emission intensity of the green light (470 nm to 600 nm) peak to the maximum emission intensity of the blue light (430 nm to 470 nm) peak (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 in the range of 0.3 to 0.5. Is preferred.

  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 effect of reducing the power consumption due to the large transmittance of the blue pattern is more effectively exhibited. Can do. 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. It is preferable to be within the range of 3 to 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.

(B) 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.

(C) 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 or 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.

(2) Upper surface transparent electrode layer The upper surface transparent electrode layer in the present invention is formed on the organic EL layer described above, and a voltage is applied to the organic EL layer sandwiched between the lower electrode layer described later, and 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 etching using a photolithography method as necessary is suitably used.

(3) 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 and added. Can do.

(1) 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.

(2) 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.

(3) Sealing layer The organic EL element side base material used in the present invention may have a sealing layer.
As shown in FIG. 2, the sealing layer 95 is formed in a portion other than the conductive portion with the metal electrode layer 15 on the upper surface transparent electrode layer 85 (hereinafter sometimes referred to as a non-conductive 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-conductive 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 an organic EL element side substrate used in the present invention, a known method can be used as a method for forming an organic EL element side substrate used in a general organic EL display device. Since it can do, description here is abbreviate | omitted.

III. 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. Sealing Agent The organic EL display device of the present invention may have a sealing agent. 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 of the display device 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 wiring 202-204 from the other pole of the power source P to the metal electrode layer 15 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 metal electrode layer 15 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.

IV. Organic EL Display Device The organic EL display device of the present invention is characterized in that the metal electrode layer and the upper transparent electrode layer are in contact with each other so as to be conductive. As the organic EL display device of the present invention, among the above-described embodiments, the metal electrode layer and the upper transparent electrode layer are in direct contact, or the metal electrode layer and the upper transparent electrode layer are interposed via the transparent electrode layer. It is preferable that the contact is made. This is because the number of manufacturing steps of the organic EL display device can be reduced, and an organic EL display device with higher productivity can be obtained.

V. 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.

VI. 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 light shielding portion formed on the transparent substrate and having an opening, and the opening of the light shielding portion on the transparent substrate. A transparent electrode layer formed on the entire surface of the light shielding portion and the colored layer, and a metal electrode layer formed on the light shielding portion, and the height of the light shielding portion is It is characterized by being higher than the height of the colored layer.

  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, the height of the light-shielding portion is higher than the height of the colored layer, and the metal electrode layer formed on the light-shielding portion has a metal electrode when used in an organic EL display device. Since the electrode layer can be brought into contact with the upper surface transparent electrode layer of the organic EL element side substrate, it is possible to suitably suppress the occurrence of uneven brightness and color mixture of parallax, and an organic product with good productivity. A color filter for an EL display device can be obtained.

More specifically, according to the present invention, since the metal electrode layer is provided, the metal electrode layer is electrically connected to the upper transparent electrode layer of the organic EL element side substrate when used in an organic EL display device. Since the current from the organic EL element side substrate can be guided to the color filter side through the metal electrode layer and escaped, the occurrence of uneven brightness can be suppressed.
In addition, according to the present invention, since the metal electrode layer is formed on the light-shielding portion having a relatively large area, the conductive area of the metal electrode layer and the upper transparent electrode layer when used in an organic EL display device. Therefore, it is possible to suitably suppress the occurrence of luminance unevenness.
Further, according to the present invention, since the height of the light shielding portion is higher than the height of the colored layer, when used in an organic EL display device, the transparent substrate can be obtained by making the color filter and the organic EL element side substrate face each other. The organic EL element can be arranged in a space surrounded by the substrate and the light shielding portion, and the diffracted light generated inside the organic EL display device can be absorbed by the light shielding portion, and the organic EL display device is viewed from an oblique direction. Sometimes it is possible to prevent light from the organic EL element from being transmitted through a colored layer disposed in another adjacent pixel, thereby preventing parallax color mixing and the like.
Further, according to the present invention, when used in an organic EL display device, the metal electrode layer can be brought into contact with the upper transparent electrode layer using the light shielding portion, so that, for example, the metal electrode such as a column portion Since no other member is required to bring the layer and the upper transparent electrode layer into contact with each other, the number of manufacturing steps of the color filter for the organic EL display device can be reduced, and the organic EL with good productivity A color filter for a display device can be obtained.

Further, according to the present invention, since the transparent electrode layer is formed on the entire surface of the light shielding portion and the colored layer, when used in an organic EL display device, the transparent electrode layer is led to the color filter side through the metal electrode layer. Therefore, the difference in voltage drop between the peripheral portion and the central portion of the organic EL display device can be further reduced, so that display with less luminance unevenness can be achieved.
In addition, according to the present invention, since the transparent electrode layer is formed, gas barrier properties can be imparted to the color filter. Therefore, when used in an organic EL display device, the deterioration of the organic EL element is suppressed. can do.

  The details of the color filter for the organic EL display device of the present invention can be the same as those described in the above-mentioned section “A. Organic EL display device I. Color filter”, and thus description thereof is omitted here. To do.

  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 the composition for forming a light shielding part)
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 light shielding part forming composition.
<Composition of composition for light shielding part formation>
-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 light shielding part)
Next, the obtained light shielding part forming composition was applied to a transparent substrate, patterned by photolithography, and then baked to form a light shielding part.
The film thickness of the obtained light shielding part was 3 μm.

(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 light shielding portion on the glass substrate, patterned by photolithography, and then 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. Thereby, a colored layer in which a red colored layer, a green colored layer, a blue colored layer, and a white colored layer were arranged was formed.
The thickness of the colored layer was 1.5 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 light shielding portion and the colored layer by vapor deposition, and then patterned by photolithography to form a metal electrode layer on the non-pixel area where the light shielding portion is formed. Formed.

(Formation of transparent 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 transparent electrode layer.

(Annealing treatment)
Thereafter, annealing was performed for 40 minutes at 150 ° C.
A color filter was obtained by the above procedure.

(Production of organic EL display device)
As an organic EL element side substrate for producing an organic EL display device facing the above color filter, an organic EL element side substrate including a white light-emitting light source was prepared in the following manner.
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.
On this, a lower electrode layer made of aluminum was formed so as to correspond to the colored layers of each color of the color filter substrate, and an insulating layer (partition wall) made of polyimide was formed in the gap between these lower electrode layers. 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.
Thereafter, 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 transparent electrode layer face each other, and the transparent electrode layer on the color filter side and the upper transparent electrode layer are in contact with each other. Then, an organic EL display device was produced by pasting together via an adhesive (NT-01UV manufactured by Nitto Denko Corporation).

[Example 2]
A colored layer was formed by the same method as in Example 1, and then an overcoat layer was prepared by the following method.

(Formation of overcoat layer, etc.)
The curable resin composition A was applied on a substrate on which a colored layer had been formed by a spin coating method and dried to form a coating film having a dry coating film thickness of 1 μm.
A photomask is placed at a distance of 100 μm from the coating film of the curable resin composition, and an ultraviolet ray is applied only to the region corresponding to the overcoat 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 development was carried out, and only the uncured part of the coating film of the 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. Thereafter, a metal electrode layer, a transparent electrode layer, and an annealing treatment were performed in the same manner as in Example 1 to produce 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]
In the same manner as in Example 1, the thickness of the light shielding part was changed to 1.0 μm, and then the colored layer was prepared in the same manner as in Example 1. Next, convex columns were formed using NN780 (manufactured by JSR) at a predetermined location in the non-pixel area 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]
Up to the metal electrode layer was formed in the same manner as in Example 2. Next, convex columns were formed in the same manner as in Comparative Example 1. Finally, the transparent electrode layer was annealed with 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 less than 10%, and ΔY was 10% or more, x.

(Evaluation method of parallax color mixture)
The organic EL display device was displayed as a single color pixel with white pixels, and the color shift when viewed from 60 ° obliquely with respect to the front surface was visually checked for the presence or absence of color mixing. In Table 1, the case where the color mixing level was improved from Comparative Example 1 was determined as “good”, and the case where the color mixing level in Comparative Example 1 was equal to or lower than that in Comparative Example 1 was determined as “poor”.

(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 production method having one fewer steps than Comparative Example 2 was designated as -1, the production method having two fewer steps, -2, and the production method having three, fewer steps, as -3. Further, in the column of cost in Table 1, a manufacturing method having one process less than that of Comparative Example 2 was designated as “◯”, and a manufacturing method having two or more processes 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 ... Light-shielding part 13 ... Colored layer 14 ... Transparent electrode layer 15 ... Metal electrode layer 70 ... Organic EL element side substrate 71 ... Substrate 80 ... Organic EL element 81 ... Bottom electrode layer 83 ... Organic EL layer 85 ... Upper surface Transparent electrode layer 100 ... Organic EL display device

Claims (4)

A transparent substrate, a light shielding portion formed on the transparent substrate and having an opening, a colored layer formed in the opening of the light shielding portion on the transparent substrate, formed on the entire surface on the light shielding portion and the colored layer A transparent electrode layer, and a color filter including a metal electrode layer formed on the light-shielding portion, and a height of the light-shielding portion higher than that of the colored layer;
A substrate, and a bottom electrode layer formed on the substrate, an organic electroluminescence layer formed on the bottom electrode layer and including a light emitting layer, and a top transparent electrode layer formed on the organic electroluminescence layer An organic electroluminescence element side substrate provided with an organic electroluminescence element,
The difference between the height of the light shielding part and the height of the colored layer is 1 μm or more and 5 μm or less,
The light shielding part 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,
An organic electroluminescence display device, wherein the metal electrode layer and the upper transparent electrode layer are in contact with each other so as to be conductive.   The organic electroluminescence display device according to claim 1, wherein the light-shielding portion is formed of a laminate of colored layers for light-shielding portions of a plurality of colors. A transparent substrate;
A light-shielding portion formed on the transparent substrate and having an opening;
A colored layer formed in the opening of the light-shielding portion on the transparent substrate;
A transparent electrode layer formed on the entire surface of the light shielding portion and the colored layer;
A metal electrode layer formed on the light shielding portion,
The height of the light shielding part rather higher than the height of the colored layer,
A color filter for an organic electroluminescence display device , wherein a difference between a height of the light shielding portion and a height of the colored layer is 1 μm or more and 5 μm or less .   The color filter for an organic electroluminescence display device according to claim 3, wherein the light shielding portion is formed of a laminated body of colored layers for light shielding portions of a plurality of colors.

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