JP5915339B2 - Color filter substrate used for organic electroluminescence display device, color filter for organic electroluminescence display device, and organic electroluminescence display device - Google Patents

Description

  The present invention relates to a color filter substrate used for an organic electroluminescence display device, a color filter for an organic electroluminescence display device, and organic electroluminescence comprising these (hereinafter sometimes referred to as “organic EL”). The present invention relates to a display device.

  In recent years, flat displays have been used in many fields and places, and their importance has been increasing with the progress of computerization.

  Currently, liquid crystal displays (LCD) can be said to be at the center of flat displays, but organic EL, inorganic EL, and plasma display panels (PDP) can be used as flat displays based on a different display principle from liquid crystal displays (LCD). Development of a light emitting diode display device (LED), a fluorescent display tube display device (VFD), a field emission display (FED), and the like is also actively conducted.

  Each of these new flat displays is called a self-luminous type, and is greatly different from a liquid crystal display (LCD) in the following points, and has an excellent feature not found in a liquid crystal display (LCD).

  A liquid crystal display (LCD) is called a light-receiving type, and the liquid crystal does not emit light by itself, but operates as a so-called shutter that transmits and blocks external light to constitute a display device. For this reason, a light source is required and generally a backlight is required. On the other hand, since the device itself emits light in the self-luminous type, no separate light source is required. In addition, in a light receiving type such as a liquid crystal display (LCD), the backlight is always lit regardless of the display function, and power that is almost the same as in the full display state is consumed. On the other hand, the self-luminous type has the advantage that less power is consumed compared to the light-receiving type display device because only the portion that needs to be lit according to the display information consumes power. Exists.

  Similarly, in a liquid crystal display (LCD), the light from the backlight source is shielded to obtain a dark state. Even with a small amount, it is difficult to completely eliminate light leakage. Since the state where no light is emitted is just a dark state, an ideal dark state can be easily obtained, and the self-light-emitting type is overwhelmingly superior in contrast. In addition, the liquid crystal display (LCD) uses polarization control based on the birefringence of the liquid crystal, so the display state changes greatly depending on the viewing direction, so-called viewing angle dependence is strong. Absent. Furthermore, since a liquid crystal display (LCD) uses a change in orientation derived from the dielectric anisotropy of liquid crystal, which is an organic elastic material, in principle, the response time to an electric signal is 1 ms or more. On the other hand, the above self-luminous technology, which is being developed, uses so-called carrier transitions such as electrons / holes, electron emission, plasma discharge, etc. Yes, it is so fast that it is incomparable with liquid crystals, and there is no problem of afterimages due to slow response of liquid crystal displays (LCDs).

  Recently, researches on organic EL display devices are particularly active among these. (1) Three primary color light emitting layers are formed in a predetermined pattern for each light emission color, (2) White light emitting light emitting layer is used, Display through three primary color filters, (3) Use a blue light emitting layer, install a color conversion layer using fluorescent dye, convert blue light into green fluorescence or red fluorescence and display three primary colors Something has been proposed.

  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 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, so that the ITO The effect of voltage drop is large.

  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.

  In addition, the following patent documents 1-patent document 4 are mentioned as a prior art considered to be related to this invention.

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, the upper portion located on the element isolation bank formed on the first substrate is one of the purposes to prevent unevenness in light emission luminance due to the voltage drop caused by the upper transparent electrode. The first substrate and the second substrate are arranged to face each other so that the electrode and the conductive light shielding pattern formed on the second substrate are electrically connected, and at least the upper electrode or the conductive light shielding pattern is An organic electroluminescence display device 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 with a large number of steps is wasted. Further, an organic EL element including an organic EL layer sandwiched between a pair of electrodes is usually covered and protected by a sealing layer for protecting the organic EL element, and the presence of this sealing layer Therefore, it is necessary to consider technically how to establish conduction with the coated electrode.

  Patent Document 2 discloses a high-output-quality organic EL device that can further reduce the resistance of the power supply wiring and the second electrode, reduce display luminance unevenness, and achieve high luminance and high contrast. In this proposal, the same problem as in Patent Document 1 can occur.

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

  In Patent Document 4, since the effective resistance value of the transparent electrode 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 be performed is made | formed, the problem similar to the said patent document 1 may arise also in the said proposal.

  Furthermore, in recent organic EL display devices, a convex column is formed on the color filter substrate that constitutes the organic EL display device, and the top of the column is used to connect the color filter substrate to the opposing substrate. Has been tried. However, in this case, disconnection may occur depending on the shape of the convex column formed, and it is not yet at a practical level.

  The organic EL display device has been described above as an example, but this problem may occur not only in the organic EL display device but also in other display devices. The present invention was devised under such circumstances, and the purpose thereof is, for example, when developing a large screen organic EL display device, the luminance unevenness between the central portion of the screen and the outer peripheral portion of the screen. The color unevenness can be prevented by forming the means for preventing the occurrence of luminance unevenness in a configuration that reduces the cost risk, and the conduction is not broken at the convex column portion. An object is to provide a substrate, a color filter, and an organic electroluminescence display device using these.

An invention for solving the above-mentioned problems is a color filter substrate used in an organic electroluminescence display device, which is formed around a transparent substrate, a pixel portion formed on the transparent substrate, and the pixel portion. A non-pixel area, a metal auxiliary electrode layer is provided in the non-pixel area, and at least one non-conductive convex column is formed in the non-pixel area. An electrode layer is provided on at least the top of the convex column, and the convex column has an inversely tapered column main body whose diameter gradually increases from the base side to the top at least in part, by having a shape correction unit consisting of a material different from that of the pillar main body is provided on at least part of the surface of the pillar main body, the convex pillar group at least in part And it forms a tapered shape whose diameter is gradually reduced to reach from the side to the top, wherein the electrode layer between the metal auxiliary electrode layer of the non-pixel area the convex Hashiraitadaki portion is conductive.

  In the above invention, the non-pixel area may have an intersection where lines in the vertical and horizontal directions intersect, and the convex column may be formed at the intersection.

  Further, in the above invention, when the arrangement density D1 of the convex columns arranged in the central portion of the substrate is compared with the arrangement density D2 of the convex columns arranged in the outer peripheral portion of the substrate , D1> D2.

An invention for solving the above-mentioned problems is a color filter for an organic electroluminescence display device, comprising a transparent substrate, a pixel portion formed on the transparent substrate, and a non-pixel formed around the pixel portion. A non-pixel area, a metal auxiliary electrode layer is provided in the non-pixel area, and at least one non-conductive convex column is formed at least in the non-pixel area, An electrode layer is provided on at least the top of the convex column, and the convex column has an inversely tapered column main body portion whose diameter gradually increases from the base side to the top at least in part, and the column by having a shape correction unit consisting of a material different from that of the pillar main body is provided on at least part of the surface of the body portion, the convex pillar top from the base side at least in part A color filter substrate that has a tapered shape with a diameter that gradually decreases until the metal auxiliary electrode layer and the electrode layer at the convex column top portion are electrically connected to each other, and the color filter substrate And a colored layer formed on a pixel portion of the substrate.

Furthermore, an invention for solving the above-mentioned problems is an organic electroluminescence display device, which is a transparent substrate, a pixel portion formed on the transparent substrate, and a non-pixel area formed around the pixel portion. In the non-pixel area, a metal auxiliary electrode layer is provided, and a non-conductive convex column is formed in at least one place of the non-pixel area, and the convex column An electrode layer is provided on at least the top of the column, and at least a part of the convex column has an inversely tapered column main body whose diameter gradually increases from the base side to the top , and by having a shape correction unit consisting of a material different from that of the pillar main body is provided on at least a part of a surface, the convex pillar to reach from the base side to the top at least part A color filter substrate in which the metal auxiliary electrode layer in the non-pixel area and the electrode layer at the convex column top portion are electrically connected, and a pixel portion of the color filter substrate. An organic EL element side substrate comprising: a color filter having a colored layer formed on the substrate; and an organic electroluminescence element including a substrate and an organic EL layer formed on the substrate. And the said color filter and the said organic EL element side board | substrate are arrange | positioned so that the said colored layer and the said organic electroluminescent element may oppose, The said organic electroluminescent element is the said organic EL layer, and the said organic The electrode including a pair of lower electrode layer and upper transparent electrode layer arranged so as to sandwich the EL layer and formed on the top of the convex column. Characterized in that a portion of the layer and the top surface transparent electrode layer is formed so attained that conducts in contact.

  According to the color filter substrate, the color filter, and the organic electroluminescence display device using these according to the present invention, the metal auxiliary electrode layer is provided in the non-pixel area, and the electrode layer is provided on the top of the convex column. Since they are provided and are electrically connected, it is possible to prevent the occurrence of uneven brightness between the center portion of the screen and the outer peripheral portion of the screen, particularly when a large-screen organic EL display device or the like is configured. In addition, since the convex column is made of a non-conductive material, there is no fear that a problem of strength reduction occurs as compared with the case where the conductive material is contained. Furthermore, since the convex column has a column main body portion and a shape correction portion, at least a portion thereof has a tapered shape in which the diameter gradually decreases from the base side to the top portion, so that the metal auxiliary electrode layer and There is no disconnection between the electrode layer at the top of the convex column.

It is sectional drawing which shows the color filter for organic EL display devices of this invention, and an organic EL element side board | substrate. It is sectional drawing of the organic electroluminescence display formed by joining the color filter for organic electroluminescence displays shown in FIG. 1, and the organic electroluminescent element side board | substrate. It is the top view which showed a part of color filter for organic EL display devices which is 1st Embodiment, and is equivalent to the (alpha)-(alpha) arrow top view of FIG. (A) is an expanded sectional view of the convex pillar 17 concerning this embodiment, FIG.4 (b) is an expanded sectional view of the convex pillar for a comparison. It is the schematic sectional drawing which showed a part of color filter for organic EL display devices which is 2nd Embodiment. It is the schematic sectional drawing which showed a part of color filter for organic EL display devices which is 3rd Embodiment. It is the schematic sectional drawing which showed a part of color filter for organic EL display apparatuses which is 4th Embodiment. It is the schematic sectional drawing which showed a part of color filter for organic EL display apparatuses which is 5th Embodiment. It is the schematic sectional drawing which showed a part of color filter for organic EL display devices which is 6th Embodiment. (A) is a schematic sectional drawing for demonstrating 7th Embodiment of the color filter of this invention, (b) is the schematic plan view which looked at this from the top. (A) is a schematic sectional drawing for demonstrating 8th Embodiment of the color filter of this invention, (b) is the schematic plan view which looked at this from the top.

  Hereinafter, a plurality of embodiments for carrying out the present invention will be described in detail with reference to the drawings. In addition, this invention is not limited to the form demonstrated below, In the range which does not deviate from a technical thought, it can implement in various deformation | transformation. In the accompanying drawings, the vertical and horizontal scales may be exaggerated for the sake of explanation, and the actual scales may differ.

  Further, the following description will focus on the color filter for an organic EL display device of the present invention, but the present invention is not limited to this. If only the colored layer is removed from the color filter described below, the present invention will be described. It becomes a substrate for a color filter.

<First Embodiment>
A color filter for an organic EL display device and an organic EL display device according to a first embodiment of the present invention will be described with reference to FIGS.

  FIG. 1 is a cross-sectional view showing a color filter 10 for an organic EL display device and an organic EL element side substrate 70 of the present invention. The cross-sectional views of these constituent members are shown in a plan view of the color filter 10 for an organic electroluminescence display device shown in FIG. 3, that is, ABCD-F-G-G-H-I-J-K-L. It is sectional drawing which looked at the cut surface in the -MN line, and the cut surface of the organic EL element side board | substrate 70 according to it. FIG. 2 is a cross-sectional view of the organic EL display device 100 formed by bonding the organic EL display device color filter 10 and the organic EL element side substrate 70 shown in FIG. FIG. 3 is a plan view showing a part of the color filter 10 for an organic EL display device according to the first embodiment, and corresponds to a plan view taken along the line α-α in FIG.

(Description of Color Filter 10 for Organic EL Display Device)
The color filter 10 for an organic EL display device according to the present invention is a color filter for an organic EL display device (hereinafter simply referred to as an organic EL display device) used in an organic EL display device using light from an organic EL layer including a light emitting layer of an organic EL element as a light emission source. , Sometimes referred to as a color filter).

  As shown in FIG. 1, the color filter 10 according to the present invention includes a transparent substrate 11, a colored layer 13 that is a pixel portion formed on the transparent substrate 11, and a non-pixel formed around the colored layer 13. And an area 12. Usually, when attention is paid to most of the other colored layers 13 excluding the colored layer 13 arranged on the outermost periphery of the substrate, the non-pixel area 12 exists in a gap portion between the adjacent colored layers 13. Note that the pixel portion refers to a portion through which light is transmitted when the color filter is used in various display devices. In the color filter 10 of the present invention, the colored layer 13 is not necessarily formed in the pixel portion. Alternatively, a part of the pixel portion may simply be a region through which light is transmitted.

  The transparent substrate 11 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.

  The colored layer 13 has a red colored layer 13R, a green colored layer 13G, and a blue colored layer 13B, and is usually patterned in a state in which these are sequentially arranged, but the pattern arrangement is particularly limited to that shown in the drawing. It is not something. 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.

  In addition, the number (the number of pixels) of the colored layers 13 which are the pixel portions in the drawings is described as an example only, and is not limited to the illustrated example. As a formation method of the colored layer 13, a formation method of the colored layer 13 in a general color filter, for example, a photolithography method, an inkjet method, a printing method, or the like may be used.

  In the present embodiment, it is usually desirable to form a light shielding portion 12a (sometimes referred to as a so-called black matrix) in the non-pixel area 12, but this is indispensable for exhibiting the effects of the present invention. It will not be. The light shielding portion 12a is usually configured as a lattice-shaped light shielding layer, and is usually configured using a photoresist, a printing ink, or a metal such as chromium containing a black pigment, a binder resin, and a solvent. Examples of black pigments used in printing inks include carbon black and titanium black. Examples of binder resins include benzyl methacrylate: styrene: acrylic acid: 2-hydroxyethyl methacrylate copolymer. The solvent can be selected from various known solvents.

  As a method for forming the light shielding portion 12a, it can be formed by a photolithography method, various pattern printing methods, various plating methods, and the like.

  In the color filter 10 according to the present embodiment, an overcoat layer 14 is provided so as to cover the colored layer 13 that is the pixel portion described above and the entire light shielding portion 12 a located in the non-pixel area 12. The overcoat layer 14 is not an essential component of the present invention. However, by forming the overcoat layer 14, these formation surfaces are formed in forming the metal auxiliary electrode layer and the convex columns described later. This is preferable in that it can be flattened and the colored layer 13 can be protected.

  The material for forming the overcoat layer 14 is not particularly limited, and various types of conventionally used resins may be selected as appropriate, and various printing methods may be used even in the formation method.

  Here, in the non-pixel area 12, more specifically, a metal auxiliary electrode layer 15 is provided on the surface of the overcoat layer 14 located in the non-pixel area 12. Examples of the material used for the metal auxiliary electrode layer 15 include metals such as Cu, Ag, Au, Pt, Al, Cr, and Co, alloys thereof, or MAM (molybdenum / aluminum / neodymium alloy / molybdenum). A multilayer metal film etc. can be mentioned.

  As a method for forming the metal auxiliary electrode layer 15, for example, a method of patterning by photolithography after forming a thin film by vapor deposition or sputtering is preferably used.

  As for the place where the metal auxiliary electrode layer 15 is formed, as shown in FIGS. 1 and 2, it is preferable to arrange the pattern in a line in the non-pixel area 12, but the present invention is not limited to this. A position where the supplied current can be conducted to the organic EL element side substrate through an electrode layer formed on the top of the convex column, which will be described later, and the aperture ratio of the opening is reduced during display If there is no position, it can be designed freely.

  In the non-pixel area 12 of the color filter 10 according to the present embodiment, in addition to the metal auxiliary electrode layer 15, a non-conductive convex column 17 is formed in at least one place of the non-pixel area 12. An electrode layer 18 is provided on the top of the convex column 17. In the color filter 10 of the present invention, the metal auxiliary electrode layer 15 and the electrode layer 18 at the top of the convex column 17 are electrically connected. Thereby, the current from the organic EL element side substrate 70 having the organic EL layer 83 to be described later is guided to the color filter 10 side through the electrode layer 18 formed on the top of the convex column 17 and the metal auxiliary electrode layer 15. By letting it escape, a voltage drop can be prevented. As a result, it is possible to prevent the occurrence of luminance unevenness between the central portion of the screen and the outer peripheral portion of the screen, which is the subject of the present invention.

  Therefore, it is desirable that the convex column 17 is formed at a location where luminance unevenness is likely to occur, particularly near the center of the substrate. In the present embodiment, three convex pillars 17 are formed in the vicinity of the central portion of the cross-sectional view in FIG. 1, but these are merely shown as examples, and the number and arrangement location thereof are not shown. It is not limited to things. What is necessary is just to set a number, arrangement | positioning place, etc. suitably so that the effect of this invention can be expressed in the optimal state.

  In the case where one or a plurality of convex columns 17 are disposed, the arrangement density D1 of the convex columns disposed in the central portion of the substrate is compared with the arrangement density D2 of the convex columns disposed on the outer peripheral portion of the substrate. In this case, it is desirable to configure so that D1 ≧ D2, preferably D1> D2.

  When obtaining D1 and D2, the size of the substrate corresponding to the size of the screen is divided into three equal parts vertically and horizontally to divide the substrate into 3 × 3 9 divisions. The central area corresponds to the central part of the substrate, and the arrangement density of the convex columns measured here is defined as D1. Then, eight outer areas other than the central area correspond to the outer peripheral portion of the substrate, and the largest value among the arrangement density of the convex columns measured in each of these areas is defined as D2.

  Such a convex column 17 is formed of a non-conductive material. In the color filter 10 of the present invention, since conduction is ensured by the electrode layer 18 provided on the top of the convex column 17, it is not necessary to impart conductivity to the convex column 17 itself. The degree of freedom in material design can be improved, and since it is not necessary to mix a conductive material into the convex column 17, its strength does not decrease. As a specific material of the convex column 17, various resins can be used.

  FIG. 4A is an enlarged cross-sectional view of the convex column 17 according to the present embodiment, and FIG. 4B is an enlarged cross-sectional view of the convex column for comparison.

  Here, as shown in FIG. 4A, the convex column 17 according to the present embodiment includes a column main body portion 17a and a shape correcting portion 17b provided on at least a part of the surface of the column main body portion 17a. As a result, at least a part of the convex column 17 is configured to have a tapered shape whose diameter gradually decreases from the base side to the top as shown in the figure. It is a feature.

  As described above, the color filter 10 according to the present embodiment prevents a voltage drop by making the metal auxiliary electrode layer 15 and the electrode layer 18 at the top of the convex column 17 conductive. Therefore, conduction between the metal auxiliary electrode layer 15 and the electrode layer 18 at the top of the convex column 17 must be ensured. However, for example, when the cross-sectional shape of the convex column has a so-called reverse taper shape as shown in FIG. 4B, the conduction between the metal auxiliary electrode and the electrode layer at the top of the convex column is intended. There is a risk that the lead wire will break. Although it depends on the method of manufacturing the convex column, it is usually manufactured by a photolithography method using an ultraviolet curable resin, and the curing of the base side of the convex column is incomplete. Therefore, there is a high possibility that the convex column becomes an inversely tapered shape, and the risk of the disconnection is increased. Moreover, the risk tends to increase as the height of the convex column increases.

  On the other hand, the convex column 17 according to the present embodiment has a so-called forward tapered shape as the entire shape of the convex column 17 even if the column main body portion 17a of the convex column 17 has a reverse tapered shape. In other words, in the column main body portion 17a, since the shape correcting portion 17b is provided in a portion lacking with respect to an ideal so-called forward tapered shape, the above disconnection does not occur, and thus the convex column The height of 17 can be designed freely without worrying about disconnection.

  Specific examples of the convex column 17 having a tapered cross-sectional shape include a truncated cone having a shape obtained by cutting the tip of a cone as shown in the figure, a cylinder, a triangular frustum, a square frustum, and the like. Can do. The width of the base that is the base of the convex column 17 is about 8 to 100 μm, the width of the top is about 3 to 95 μm, and the height is about 2.5 to 25 μm. The taper angle from the base side to the top is about 30 to 89 °.

  Various embodiments of the column main body portion 17a and the shape correcting portion 17b constituting the convex column 17 according to the present embodiment will be described later.

  In the first embodiment, the electrode layer provided on the top of the convex column 17 is the transparent electrode layer 18 and is configured not only as the top but also as a so-called solid film. The electrode layer provided on the top of the convex body 17 in the present invention does not necessarily need to be transparent and does not need to be a solid film, but by configuring as a transparent solid film, This is preferable in that the conduction can be ensured and the formation thereof is easy.

  Examples of the material for forming the transparent electrode layer 18 include metal oxides having transparency and conductivity. Examples of such a metal oxide include indium tin oxide (ITO), indium oxide, zinc oxide, and stannic oxide. The thickness of the transparent electrode layer 18 is 50 nm to 1500 nm, and more preferably 120 nm to 1200 nm. As a method for forming the transparent electrode layer 18, for example, a vapor deposition method or a sputtering method may be used.

  The colored layer 13 that is preferably used in the color filter 10 of the present invention will be further described. As described above, in the color filter substrate of the present invention, the colored layer 13 is not an essential structure, and also in the color filter 10 of the present invention, a colored layer is provided on the entire pixel portion. It does not have to be.

  The colored layer 13 including the red colored layer 13R, the green colored layer 13G, and the blue colored layer 13B is provided corresponding to the unit pixel of the organic EL display device 100 (see FIG. 2). The red colored layer 13R, the green colored layer 13G, and the blue colored layer 13B are formed on the substrate after each colorant such as a pigment or dye is dispersed or dissolved in the photosensitive resin. .

  Examples of the colorant used in the red colored layer 13R 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 for the green colored layer 13G include phthalocyanine pigments such as halogen polysubstituted phthalocyanine pigments or halogen polysubstituted copper phthalocyanine pigments, triphenylmethane basic dyes, isoindoline pigments, and isoindoline. Examples include linone pigments. These pigments or dyes may be used alone or in combination of two or more.

  Examples of the colorant used for the blue colored layer 13B 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.

  Note that the non-pixel area 12 has an intersecting portion where lines in the vertical and horizontal directions intersect, and it is desirable to form the convex column 17 at the intersecting portion of the non-pixel area 12. This is because a space can be provided at the formation position of the convex column 17 and it can be formed in a state where the strength is increased. Further, it can be formed relatively easily and can contribute to an improvement in yield. Depending on the design of the TFT, the formation position of the convex column 17 may not be an intersection.

(Description of organic EL element side substrate 70)
As shown in FIG. 1, the organic EL element side substrate 70 includes a substrate 71 and an organic electroluminescence element 80 including an organic EL layer 83 formed on the substrate 71.

  By integrating and joining the organic EL element side substrate 70 and the color filter 10 as described above, an organic electroluminescence display device 100 as shown in FIG. 2 is formed. When the organic EL element side substrate 70 and the color filter 10 are integrated and joined, the organic electroluminescence element 80 of the organic EL element side substrate 70 and the colored layer 13 of the color filter 10 are arranged to face each other. Is done.

  The organic electroluminescence element 80 includes an organic EL layer 83, a pair of lower surface electrode layers 81 and an upper surface transparent electrode layer 85 arranged so as to sandwich the organic EL layer 83. In addition, an insulating layer 91 is formed around the organic EL layer 83, and the organic EL layer 83 is partitioned by the insulating layer 91, and the lower electrode layer 81 and the upper transparent electrode layer 85 may be in direct contact with each other. Is prevented. Furthermore, a sealing layer 95 for mainly protecting the organic EL layer 83 is formed on the upper transparent electrode layer 85 so as to cover the entire element. The sealing layer 95 is not an essential component for the organic electroluminescence display device 100.

  A through hole 95a is formed on the surface of the sealing layer 95 facing the color filter 10. The through hole 95a can be inserted into the tip of the convex column 17 formed in the color filter 10, and the transparent electrode layer 18 formed on the top of the convex column 17 and the organic electro The luminescent element 80 is formed so as to be in contact with the upper transparent electrode layer 85 so as to be conductive. It is desirable that the through hole 95a has a tapered shape similar to the tip of the convex column 17 to be inserted, and that the tip of the convex column 17 can be fitted into the through hole 95a. Further, the depth of the through hole 95 a is set to a depth that reaches the upper transparent electrode layer 85. Further, although not shown, a conductive film may be formed on the side surface of the through hole 95a so as to facilitate the conduction between the transparent electrode layer 18 and the upper transparent electrode layer 85. Providing such a through hole 95a is preferable because conduction can be ensured even when the sealing layer 95 is provided.

  The part where the through hole 95a is formed is preferably provided in a part where the organic EL layer does not exist so as not to narrow the light emitting area. For example, as shown in FIGS. 1 and 2, a through hole 95 a may be formed in a gap portion between adjacent organic EL layers 83.

  By adopting the configuration as described above, as described above, the current from the organic EL element side substrate 70 having the organic EL layer 83 is applied to the transparent electrode layer 18 formed on the top of the convex column 17, and the transparent electrode By leading to the color filter 10 side through the conductive metal auxiliary electrode layer 15 and letting it escape, the voltage drop can be prevented.

  As shown in the figure, TFTs (Thin Film Transistors) 75 for controlling the current flowing in the organic electroluminescence elements 80 constituting the pixels are arranged and formed on the substrate 71 for each pixel. A gate line, a signal line, and a power supply line (not shown) are connected to this circuit. Such a TFT 75 may be formed by a known method, and an insulating layer 77 is usually formed on the TFT 75. Note that as the insulating layer 77, a material similar to that of the insulating layer 91 described later can be used.

  Hereinafter, each configuration of the organic EL element side substrate 70 will be further described.

Board 71
The substrate 71 used in the present invention is not particularly limited as long as it can support the organic electroluminescence element 80 and the like, and those generally used as a constituent member of an organic EL display device can be used. In addition, since this embodiment is a so-called top emission system in which light is extracted from the color filter 10 side for the organic EL display device, the substrate 71 of the organic EL element side substrate 70 is transparent or opaque. There may be.

Insulating layer 91
As described above, the insulating layer 91 in the present invention is formed to prevent the lower electrode layer 81 and the upper transparent electrode layer 85 from coming into direct contact.

  As a material for forming such an insulating layer 91, 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. The pattern of the insulating layer 91 can be generally linear. By forming the insulating layer 91, a pattern having openings such as a matrix shape or a stripe shape can be formed.

  Examples of a method for forming the insulating layer 91 include a method of applying the above-described material and patterning by a photolithography method. Also, a printing method or the like can be used.

Organic EL layer 83
The organic EL layer 83 used in the present invention is configured to have a light emitting layer, particularly preferably a white light emitting layer. Instead of the white light-emitting layer, a red light-emitting layer, a blue light-emitting layer, and a green light-emitting layer may be sequentially provided. Here, a case where a white light-emitting layer that is a more preferable embodiment is provided will be described as an example. .

  The organic EL layer 83 is usually composed of a plurality of organic layers in addition to the light emitting layer, and holes are introduced into a charge injection layer such as a hole injection layer and an electron injection layer, and a white light emitting layer. It can have a charge transport layer such as a hole transport layer for transporting and an electron transport layer for transporting electrons to the white light emitting layer.

White light emitting layer The white light emitting layer used as a suitable light emitting layer in this invention should just be what can light-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 83. ) As long as it has an emission spectrum in the wavelength region. Furthermore, 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 (the maximum emission intensity of the green light peak / the maximum of the blue light peak is high intensity). ) 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 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, oxadiazole 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.

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). 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.

Electron Injection Layer In the present invention, an electron injection layer may be formed between the white light emitting layer and the cathode (upper surface transparent electrode layer 85 or lower electrode layer 81). This is because by providing the electron injection layer, the injection of electrons into the white light emitting layer is stabilized, and the light emission 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.

Upper transparent electrode layer 85
The upper transparent electrode layer 85 in the present invention is provided to apply a voltage to the organic EL layer 83 sandwiched between the lower electrode layer 81 described in detail later and cause the white light emitting layer to emit light.

  Moreover, since the upper surface transparent electrode layer 85 transmits the light generated in the white light emitting layer to the color filter side for the organic EL display device, the organic EL layer 83 and the organic EL layer as shown in FIG. The organic EL display device color filter 10 located above 83 is disposed.

  Examples of the material for forming the upper transparent electrode layer 85 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 85 made of such a material is usually about 100 nm to 300 nm.

  As a method for forming the upper transparent electrode layer 85, for example, a method of patterning by a photolithography method after forming a thin film by a vapor deposition method or a sputtering method is suitably used.

Lower electrode layer 81
The lower electrode layer 81 in the present invention is disposed between the organic EL layer 83 and the substrate 71 located below the organic EL layer 83 as shown in FIG. The lower electrode layer 81 forms the other electrode for causing the white light emitting layer to emit light, and is configured as an electrode having a charge opposite to that of the upper transparent electrode layer 85 described above.

Examples of the material for forming the lower surface electrode layer 81 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 / copper mixture, magnesium / silver mixture, magnesium / aluminum mixture, magnesium / indium mixture, aluminum / aluminum oxide (Al ₂ O ₃ ) mixture, indium, Examples include lithium / aluminum mixtures and rare earth metals. More preferable examples include a magnesium / silver mixture, a magnesium / aluminum mixture, a magnesium / indium mixture, an aluminum / aluminum oxide (Al ₂ O ₃ ) mixture, and a lithium / aluminum mixture.

  The lower electrode layer 81 preferably has a sheet resistance of several Ω / cm or less. The film thickness of the lower electrode layer 81 is normally about 10 nm to 1 μm.

  As a method for forming the lower electrode layer 81, for example, a method of patterning by a photolithography method after forming a thin film by an evaporation method or a sputtering method is suitably used. Note that a TFT (Thin Film Transistor) 75 for controlling a current flowing through the organic EL element is connected to the lower electrode layer 81.

Sealing layer 95
The sealing layer 95 having the above-described through hole 95a is formed on the upper transparent electrode layer 85, that is, between the upper transparent electrode layer 85 and the color filter 10 for the organic EL display device. The sealing layer 95 is usually provided as a protective layer that blocks water vapor and oxygen from reaching the organic EL layer 83.

  The sealing layer 95 is not particularly limited as long as it can exhibit barrier properties against water vapor and oxygen and is transparent. For example, a transparent inorganic film, a transparent resin film, or an organic-inorganic hybrid film Etc. are used. Among these, a transparent inorganic film is preferable because of its high barrier property.

  Examples of a material for forming a transparent inorganic film panel suitably used as the sealing layer 95 include oxides such as aluminum oxide, silicon oxide, and magnesium oxide; nitrides such as silicon nitride; nitride oxides such as silicon nitride oxide; Etc. are used. In particular, silicon nitride oxide is preferable because pinholes hardly occur and gas barrier properties are high.

  The sealing layer 95 may be a single layer or a multilayer. For example, when the sealing layer 95 is a multilayer in which a plurality of silicon nitride oxide films are stacked, the barrier property can be further improved. Moreover, when the sealing layer 95 is a multilayer, you may use a different material for each layer, respectively.

  The film thickness of the sealing layer 95 may be appropriately determined according to the type of the forming material of the sealing layer 95 to be used. Usually, it is about 5 nm to 5 μm. If the sealing layer 95 is too thin, the barrier property tends to be insufficient, and if the sealing layer 95 is too thick, a phenomenon such as cracking due to the film stress of the thin film tends to occur. Occurs.

  When the sealing layer 95 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. Examples thereof include a vacuum deposition method such as a coating method, an electron beam (EB) deposition method and a resistance heating method, an atomic layer epitaxy (ALE) method, a laser ablation method, and a chemical vapor deposition (CVD) method. Among these, the sputtering method, the ion plating method, and the CVD method are preferably used from the viewpoint of productivity.

  As a method for forming the above-described through-hole 95a at a predetermined portion of the sealing layer 95, for example, a method of patterning by a photolithography method after forming a thin film of the sealing layer 95 is preferably used.

  An organic EL display device 100 as shown in FIG. 2 is formed by integrating and joining the organic EL element side substrate 70 having such a configuration and the color filter 10. That is, when the organic EL element side substrate 70 and the color filter 10 are integrated and joined, the through hole 95a formed in the sealing layer 95 of the organic EL element side substrate 70 and the non-pixel area of the color filter 10 are provided. After aligning the tip of the convex column 17 formed, the tip of the convex column 17 is fitted into the through-hole 95a of the sealing layer 95, and the tip 17a of the convex column is formed. The portion of the transparent electrode layer 18 and the upper transparent electrode layer 85 are brought into contact with each other so as to be integrated. Thereafter, the gap between the sealing layer 95 and the transparent electrode layer 18 is filled with an adhesive layer 99 as shown in FIG. 2, and the color filter 10 and the organic EL element side substrate 70 are integrated and joined. As a result, an organic electroluminescence display device 100 as shown in FIG. 2 is formed.

  The adhesive layer 99 is not particularly limited as long as it is transparent, has adhesive force, and has curability. As a material for forming such an adhesive layer 99, 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.

  Further, the gap between the sealing layer 95 and the transparent electrode layer 18 is left without providing the adhesive layer 99, and the organic EL element side substrate 70 and the organic EL are left in an inert gas atmosphere such as nitrogen. The peripheral edge of the color filter 10 for display device may be sealed with a sealing agent, and a water capturing agent such as barium oxide may be provided inside the hollow.

  For example, as shown in FIG. 2, 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 202-203 from the other pole of the power source to the upper transparent electrode layer 85. And wirings 202-204 extending from the other pole of the power source to the metal auxiliary electrode layer 15. 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 auxiliary electrode layer 15 on the color filter side to prevent a voltage drop is wiring. 201 and wirings 204-202.

  By adopting such a configuration, the current from the organic EL element side substrate 70 having the organic EL layer 83 as described above is applied to the transparent electrode layer 18 and the metal auxiliary electrode layer formed on the top of the convex column 17. By leading to the color filter 10 side through 15 and escaping, it is possible to prevent the voltage drop.

  In addition, in said embodiment, as a suitable aspect, the color filter provided with the red colored layer 13R, the green colored layer 13G, and the blue colored layer 13B is used for the white light emitted from the organic EL layer provided with the white light emitting layer. The method of using and emitting light in three colors of RGB has been described. However, the present invention is not limited to this method. For example, an organic EL layer that emits blue light has three colors of RGB using a color conversion layer (CCM) that absorbs blue light and emits light in green and red colors. The configuration of the main part of the present invention can be applied to either a so-called blue EL color conversion (CCM) full-color system that emits light or a so-called RGB light-emitting layer juxtaposed full-color system that coats organic EL elements that emit RGB light for each pixel. .

  Hereinafter, various embodiments of the color filter for an organic EL display device of the present invention will be described with reference to the drawings. In the following description, only the color filter is described, and the description of the organic EL element side substrate and the organic electroluminescence display device integrated and bonded thereto is omitted. Further, the description will focus on the convex column which is a characteristic part of the present invention. Furthermore, for convenience of explanation, the same reference numerals are used for the same configurations as those shown in FIGS.

<Second Embodiment>
FIG. 5 is a schematic cross-sectional view for explaining a second embodiment of the color filter of the present invention.

  Similar to the color filter 10 shown in FIGS. 1 to 3, the color filter 20 includes a transparent substrate 11, a colored layer 13 that is a pixel portion, and a light shielding portion 12 a that serves as a non-pixel area. 13 and an overcoat layer 14 are provided so as to cover the entire light shielding portion 12a. A metal auxiliary electrode layer 15 is provided on the surface of the overcoat layer 14 located in the non-pixel area 12, and a convex column 17 is also provided. Further, the transparent electrode layer 18 is provided so as to cover the side surface of the convex column 17, the metal auxiliary electrode layer 15, and the entire overcoat layer 14 including the top of the convex column 17.

  In the color filter 20, the colored layer 13 has a transparent colored layer 13W in addition to the red colored layer 13R, the green colored layer 13G, and the blue colored layer 13B. Thus, in the color filter of the present invention, the colored layer 13 does not necessarily have to be composed of the three primary colors of R, G, and B, and may have a transparent colored layer 13W as shown in FIG. Good. By providing the transparent colored layer 13W, the luminance of the entire organic electroluminescence display device can be improved.

  Here, the convex column 17 of the color filter 20 according to the present embodiment includes a column main body portion 17a and a shape correcting portion 17b, and the shape correcting portion 17b is formed integrally with the overcoat layer 14 described above. In other words, the shape correction portion 17b is formed by the overcoat layer 14. As described above, the shape correcting portion 17b does not need to be provided independently from other members constituting the color filter 20, and the overcoat layer 14 also serves as the shape correcting portion 17b as in the present embodiment. Also good. By adopting such a configuration, the shape correcting portion 17b can be formed around the column main body portion 17a by forming the so-called solid film overcoat layer 14 by coating or the like.

  According to the color filter 20 according to the second embodiment, since the shape of the convex column 17 as a whole is a so-called tapered shape by the shape correcting portion 17b integrated with the overcoat layer 14, it is positioned at the top of the convex column. The transparent electrode layer 18 and the transparent electrode layer 18 provided on the metal auxiliary electrode layer 15 are conducted with a gentle curve so that no disconnection occurs.

<Third Embodiment>
FIG. 6 is a schematic cross-sectional view for explaining a third embodiment of the color filter of the present invention.

  In this color filter 25, the electrode layer provided on the top of the convex column 17 is a metal electrode layer 18, and the metal electrode layer 18 extends to the side surface of the convex column 17 and is electrically connected to the metal auxiliary electrode layer 15. The color filter according to the second embodiment shown in FIG. 5 is different from the color filter 20 according to the second embodiment shown in FIG. 20 in common.

  Thus, since the convex column 17 is composed of the column main body portion 17a and the shape correcting portion 17b and the cross-sectional shape thereof is tapered, there is no fear of disconnection, so the electrode provided on the top of the convex column 17 It is also possible to employ a metal electrode layer as the layer and extend it to the side surface of the convex column 17. Thereby, the metal auxiliary electrode layer 15 and the electrode layer provided on the top of the convex column 17 can be formed of the same material at the same time. In the color filter of the present invention, the position at which the metal auxiliary electrode layer 15 is disposed is not particularly limited, and is not necessarily provided below the convex column 17. That is, the metal auxiliary electrode layer 15 can be thinned and disposed so as not to cause a voltage drop. Even in such an embodiment, a voltage drop can be prevented by the metal electrode layer 18 located at the top of the convex column 17 and the metal auxiliary electrode layer 15 electrically connected thereto.

<Fourth Embodiment>
FIG. 7 is a schematic cross-sectional view for explaining a fourth embodiment of the color filter of the present invention.

  The color filter 30 is a second embodiment shown in FIG. 5 in that the shape correcting portion 17b constituting the convex column 17 is alone and there is no overcoat layer covering the colored layer 13. Unlike the color filter 20 according to the second embodiment, the other portions are the same as those of the color filter 20 according to the second embodiment.

  As described above, in the present invention, the shape correcting portion 17b constituting the convex column 17 may be present alone. In this case, the shape correcting portion 17b may be formed using, for example, a resin used when forming the overcoat layer, or other materials may be appropriately selected and used. In this case, since the shape correcting portion 17b exists in the non-pixel area, it is not necessarily transparent. By setting it as such an aspect, the color filter 30 whole can be made thin.

<Fifth Embodiment>
FIG. 8 is a schematic cross-sectional view for explaining a color filter according to a fifth embodiment of the present invention.

  The color filter 35 is not an overcoat layer but a solid film formed of the same material as that of the transparent colored layer 13W, thereby forming a shape correcting portion 17b constituting the convex column 17 as shown in FIG. Unlike the color filter 20 according to the second embodiment, the other parts are the same as those of the color filter 20 according to the second embodiment.

  As described above, in forming the shape correcting portion 17b constituting the convex column 17, not only the so-called diverting of the overcoat layer but also the integral formation with the transparent coloring layer 13W, in other words, transparent coloring The shape correcting portion 17b may be formed by the layer 13W. According to this aspect, the manufacturing process of the entire color filter 35 can be simplified, and the yield can be improved and the cost can be reduced.

<Sixth Embodiment>
FIG. 9 is a schematic cross-sectional view for explaining a sixth embodiment of the color filter of the present invention.

  This color filter 40 is different from the color filter 30 according to the fourth embodiment shown in FIG. 7 in that the shape correcting portion 17b constituting the convex column 17 is formed of the same material as that of the red colored layer 13R. The portion is common to the color filter 30 according to the fourth embodiment.

  As described above, in forming the shape correcting portion 17b constituting the convex column 17, not only the overcoat layer and the transparent colored layer 13W but also the colored colored layer 13 such as the red colored layer 13R is used. In other words, the shape correcting portion 17b may be formed by the red colored layer 13R. Also according to this aspect, the manufacturing process of the entire color filter 35 can be simplified, and the yield can be improved and the cost can be reduced. Although not shown, it goes without saying that the shape correcting portion 17b may be formed by using the green colored layer 13G or the blue colored layer 13B instead of the red colored layer 13R, and further, selected from these three colors. The shape correction portion 17b may be formed by laminating two colored layers, or all three colored layers.

<Seventh Embodiment>
FIG. 10A is a schematic cross-sectional view for explaining a seventh embodiment of the color filter of the present invention, and FIG. 10B is a schematic plan view of the color filter as viewed from above.

  Unlike the first to sixth embodiments, the shape correcting portion 17b in the color filter 45 is characterized in that it is formed only on the base side of the column main body portion 17a, that is, only on a part thereof. .

  As described above, the shape correcting portion 17b constituting the convex column 17 does not necessarily need to be formed so as to cover the entire column main body portion 17a. In order to make the shape of the convex column 17 a so-called tapered shape. For example, as shown in FIG. 10, when the shape of the column main body portion 17a is such that only the base side is missing over the entire circumference, as shown in FIG. It is sufficient that the shape correcting portion 17b is provided only in the case. In this embodiment, the shape correcting portion 17b is formed of the same material as that of the red colored layer 13R, as in the sixth embodiment, but is not limited thereto, and the green colored layer is not limited thereto. The shape correcting portion 17b may be formed using 13G, the blue colored layer 13B, or the transparent colored layer 13W, and further, the shape correcting portion 17b may be formed by stacking two or more colored layers selected from these four colors. . Further, when an overcoat layer is formed, it can be formed of the same material as the overcoat layer.

<Eighth Embodiment>
FIG. 11A is a schematic cross-sectional view for explaining an eighth embodiment of the color filter of the present invention, and FIG. 11B is a schematic plan view of the color filter as viewed from above.

  In this color filter 50, the shape correcting portion 17 b is not formed over the entire circumference of the column main body portion 17, and the conduction between the electrode layer 18 formed on the top of the convex column 17 and the metal auxiliary electrode layer 15 is ensured. The color filter 45 is different from the color filter 45 according to the seventh embodiment in that it is formed only in a portion necessary for the purpose.

  Thus, the shape correcting portion 17b constituting the convex column 17 does not necessarily need to be formed over the entire circumference of the column main body portion 17a, that is, all cross-sectional shapes of the convex column 17 need to be tapered. Rather, it may be formed in a part so that only the part with a risk of disconnection has a tapered shape. In this embodiment, as shown in FIG. 11B, the shape correcting portion 17b is formed only in the portion where the metal wiring 15 extending in the left-right direction in the drawing is present, but the present invention is not limited to this. For example, only the left side of the shape correcting portion 17b in FIG. 11B may be formed.

10, 20, 25, 30, 35, 40, 45, 50 ... Color filter 11 for organic EL display device ... Transparent substrate 12 ... Non-pixel area 13 ... Colored layer 15 ... Metal auxiliary electrode layer 17 ... Convex column 17a ... Column Main body portion 17b ... Shape correcting portion 18 ... Electrode layer 70 ... Organic EL element side substrate 100 ... Organic EL display device

Claims (5)

A transparent substrate, a pixel portion formed on the transparent substrate, and a non-pixel area formed around the pixel portion,
In the non-pixel area, a metal auxiliary electrode layer is provided, and a non-conductive convex column is formed in at least one place of the non-pixel area,
An electrode layer is provided on at least the top of the convex column,
The convex pillars, at least a pillar main body of the inverted tapered shape the diameter thereof gradually increases to up to the top from the base portion in part, the pillars the pillar main body is provided on at least part of the surface of the body portion By having a shape correcting part made of a material different from the part, the convex column has a tapered shape in which the diameter gradually decreases from the base side to the top part at least in part,
A substrate for a color filter used in an organic electroluminescence display device, wherein the metal auxiliary electrode layer in the non-pixel area and the electrode layer at the top of the convex column are electrically connected.   The color used in the organic electroluminescence display device according to claim 1, wherein the non-pixel area has an intersection where a plurality of lines intersect, and the convex column is formed at the intersection. Filter substrate.   When the arrangement density D1 of the convex columns arranged in the central part of the substrate and the arrangement density D2 of the convex columns arranged in the outer peripheral part of the substrate are compared, D1> D2. A substrate for a color filter used in the organic electroluminescence display device according to claim 1. A transparent substrate; a pixel portion formed on the transparent substrate; and a non-pixel area formed around the pixel portion. A metal auxiliary electrode layer is provided in the non-pixel area. In addition, a non-conductive convex column is formed in at least one portion of the non-pixel area, an electrode layer is provided on at least the top of the convex column, and the convex column has at least one The column main body portion having a reverse taper shape whose diameter gradually increases from the base side to the top portion at the portion, and a shape made of a material different from that of the column main body portion provided on at least a part of the surface of the column main body portion By having the correction portion, at least a part of the convex column has a tapered shape in which the diameter gradually decreases from the base side to the top portion, and the metal auxiliary electrode layer in the non-pixel area and the convex portion. Condition And the electrode layer of the top is conductive, the substrate for a color filter used in the organic electroluminescence display device,
A colored layer formed on a pixel portion of the color filter substrate;
A color filter for an organic electroluminescence display device, comprising: A transparent substrate; a pixel portion formed on the transparent substrate; and a non-pixel area formed around the pixel portion. A metal auxiliary electrode layer is provided in the non-pixel area. In addition, a non-conductive convex column is formed in at least one portion of the non-pixel area, an electrode layer is provided on at least the top of the convex column, and the convex column has at least one The column main body portion having a reverse taper shape whose diameter gradually increases from the base side to the top portion at the portion, and a shape made of a material different from that of the column main body portion provided on at least a part of the surface of the column main body portion By having the correction portion, at least a part of the convex column has a tapered shape in which the diameter gradually decreases from the base side to the top portion, and the metal auxiliary electrode layer in the non-pixel area and the convex portion. Condition A color for an organic electroluminescence display device, comprising: a color filter substrate used in an organic electroluminescence display device, which is electrically connected to a top electrode layer; and a colored layer formed on a pixel portion of the color filter substrate. Filters,
An organic electroluminescence display device comprising: a substrate and an organic electroluminescence element including an organic EL layer formed on the substrate; and an organic EL element side substrate comprising:
The color filter and the organic EL element side substrate are arranged so that the colored layer and the organic electroluminescence element face each other.
The organic electroluminescence element includes the organic EL layer, a pair of lower electrode layers and an upper transparent electrode layer disposed so as to sandwich the organic EL layer,
An organic electroluminescence display device, wherein the portion of the electrode layer formed on the top of the convex column and the upper transparent electrode layer are in contact with each other so as to be conductive.

Images