JP2014146643A - Organic el device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an organic EL device easily applicable for an existing space and capable of suppressing the occurrence of emission unevenness even when the size of a light emitting area is large.SOLUTION: An organic EL device includes an organic EL element 10 comprising a first electrode layer 3, a functional layer 5 and a second electrode layer 6 laminated therein, on a circular substrate 2. When the substrate 2 is viewed in plan, a light emitting region emitting light in whole light lighting time has an inside light emitting region 22 located at the inside and an outside light emitting region 23 located at the outside. The outside light emitting region 23 is annular, and located so as to surround the circumference of the inside light emitting region 22, and an organic EL element 10a located in the inside light emitting region 22 is electrically connected in series to an organic EL element 10b located in the outside light emitting region 23.

Description

  The present invention relates to an organic EL (Electro Luminescence) device.

  In recent years, organic EL devices have attracted attention as a lighting device that can replace incandescent lamps and fluorescent lamps, and many studies have been made.

Here, the organic EL device is formed by laminating an organic EL element on a substrate such as a glass substrate, a transparent resin film, or a metal sheet, and forming a power feeding structure for feeding power to the organic EL element.
And an organic EL element makes two electrodes which one or both have translucency oppose, and laminated | stacked the light emitting layer which consists of an organic compound between this electrode. The organic EL device emits light by the energy of recombination of electrically excited electrons and holes.
That is, the organic EL device is a self-luminous device and can emit light of various wavelengths by appropriately selecting the material of the light emitting layer.

  In addition, the organic EL device has a feature that the thickness is extremely small and lighter than incandescent lamps, fluorescent lamps, and LED lighting, and light is emitted in a planar shape. Furthermore, since the organic EL device has higher luminous efficiency than incandescent lamps and fluorescent lamps, it has features that it consumes less power and generates less heat.

  By the way, conventionally, a lighting device having a disk shape using a fluorescent lamp and LED lighting has been used as a lighting device in a daily space such as a house or a conference room. Along with this, the design of everyday spaces such as homes and conference rooms is often designed according to the disk-type lighting device. However, currently developed organic EL devices are often designed in a rectangular shape. Therefore, such a rectangular organic EL device has a problem that it is difficult to adapt to a structure such as an existing house, and a lighting device using the organic EL device also has a disk shape that adapts to a conventional existing space. Organic EL devices have been desired from the market.

  In addition, since the organic EL device uses surface emission as described above, the luminance varies depending on the current density flowing in the organic EL element, and uneven light emission occurs. That is, when the light emitting area exceeds a predetermined size, the distribution of the voltage flowing in the surface becomes remarkable, and the current density may be distributed to cause obvious light emission unevenness. Therefore, in order to emit light evenly from the light emitting surface of the organic EL device, it is desirable to make the current density distribution as uniform as possible.

JP 2010-245032 A

  From such a background, in recent years, an organic EL device having a disk shape has been developed (for example, Patent Document 1). Since the organic EL device described in Patent Document 1 has a disk shape, it is easily adapted to a conventional existing space. Further, since the current flows uniformly from the outer peripheral side toward the center side, the current flows uniformly at any position in the circumferential direction, and the occurrence of uneven light emission in the circumferential direction can be reduced. However, in the radial direction of the circle, no measures are taken for the occurrence of uneven light emission, and when the emission area increases and the radius exceeds a predetermined size, the organic EL element is locally applied in the radial direction of the circle. There is a problem that excessive current is generated and uneven light emission occurs. Further, when the light emitting area is increased, heat is generated in the organic EL element, and there is a problem that the organic EL element is easily deteriorated by the generated heat.

  Therefore, an object of the present invention is to provide an organic EL device that can be easily adapted to an existing space and can suppress uneven light emission even when the light emission area is large.

  The invention according to claim 1 for solving the above problem is a cross-sectional structure having a laminate in which a first electrode layer, an organic light emitting layer, and a second electrode layer are laminated on a circular or elliptical base material. In an organic EL device having a light emitting region that emits light when all the lamps are viewed in plan view, the light emitting region has an inner light emitting region located inside and an outer light emitting region located outside. The outer light emitting region is positioned so as to surround the inner light emitting region, and the stacked body positioned in the inner light emitting region is electrically connected in series with the stacked body positioned in the outer light emitting region. The organic EL device is characterized in that

According to the structure of this invention, the light emission area | region is located on the circular or elliptical base material. That is, since the light emitting region emits light on a circular or elliptical base material, it is easy to attach to an existing structure and to be familiar.
According to the configuration of the present invention, the light emitting region has at least an inner light emitting region located inside and an outer light emitting region located outside. That is, the organic EL device of the present invention emits light by dividing the light emitting surface into a plurality of light emitting regions. Therefore, compared to an organic EL device composed of one light emitting region as in Patent Document 1, a distribution is less likely to occur in the current value per unit area. Further, it is possible to prevent heat from being accumulated locally.
Moreover, according to the structure of this invention, an outer side light emission area | region is located so that the circumference | surroundings of an inner side light emission area may be enclosed. That is, the outer light emitting region forms a ring continuously or intermittently in the circumferential direction as viewed from the inner light emitting region, the voltage distribution in the circumferential direction is uniform, and the current flows uniformly. For this reason, in the outer light emitting region, current density distribution in the circumferential direction is less likely to occur, and uneven light emission is less likely to occur.
According to the structure of this invention, the laminated body located in an inner side light emission area | region is electrically connected in series with the laminated body located in an outer side light emission area | region. That is, in the inner / outer direction (radial direction), the laminated body in the inner light emitting region and the laminated body in the outer light emitting region are connected in series. Uneven light emission hardly occurs between the laminates.
As described above, according to the organic EL device of the present invention, even when the light emission area is large, uneven light emission is less likely to occur in the circumferential direction and the radial direction when all lamps are used.

  The invention according to claim 2 has a non-light-emitting region that does not emit light when the lamp is viewed in plan view, and the non-light-emitting region is interposed between the inner light-emitting region and the outer light-emitting region. The organic EL device according to claim 1, wherein the organic EL device is an organic EL device.

  According to the configuration of the present invention, since the non-light emitting region is interposed between the inner light emitting region and the outer light emitting region, for example, a feeding structure for each of the inner light emitting region and the outer light emitting region is formed in the non light emitting region. Therefore, the installation of the power feeding structure does not hinder light emission.

  The invention according to claim 3 is characterized in that the light emitting area Si of the inner light emitting region is 0.8 to 1.2 times the light emitting area So of the outer light emitting region. This is an organic EL device.

  According to the configuration of the present invention, the light emitting area Si of the inner light emitting region is not less than 0.8 times and not more than 1.2 times the light emitting area So of the outer light emitting region. That is, the light emitting area Si of the inner light emitting region is not significantly different from the light emitting area So of the outer light emitting region. Therefore, in all lamps, uneven light emission due to an extremely large light emitting area in only one of the inner light emitting region and the outer light emitting region in the radial direction does not occur.

By the way, an illuminating device used in a daily space such as a house is often attached by a fixture such as a hook ceiling provided on a ceiling, and current is often supplied from a power supply line in the fixture. Such a fixture is considerably small with respect to the area of the lighting device, and is attached to a part of the lighting device to connect a power supply line so that a current is intensively supplied from the mounting portion.
However, since the organic EL device emits light as described above, a current must flow from one end to the opposite end to illuminate the entire surface. Therefore, in order to apply the organic EL device to a conventional structure, it is necessary to have a power feeding structure that can supply current to the whole by power feeding from a part.

  Therefore, the invention according to claim 4 is characterized in that the non-light-emitting region has an outer peripheral non-light-emitting region located outside the outer light-emitting region and surrounding the outer periphery of the outer light-emitting region, and is electrically connected to an external power source. A first conductive film connectable to the outer light emitting region and the outer peripheral non-light emitting region, and the first electrode in the outer peripheral non-light emitting region 4. The organic EL device according to claim 1, wherein the organic EL device is electrically connected to the stacked body in the outer light emitting region via a layer.

According to the structure of this invention, the 1st conductive film is distribute | arranged ranging over the said outer side light emission area | region and the said outer periphery non-light emission area | region. That is, the first conductive film extends from the outer peripheral non-light emitting area toward the inner side of the outer peripheral light emitting area.
And according to the structure of this invention, the 1st conductive film extended from the outer periphery non-light-emission area | region is electrically connected with the laminated body in the said outer side light emission area | region via the 1st electrode layer in an outer periphery non-light-emitting area | region. It is connected. In other words, the first conductive film can supply power to the first electrode layer in the outer peripheral non-light emitting region from the inner side of the outer peripheral non-light emitting region. For this reason, it is easy to collect a part of the power feeding from the external power source.

  The invention according to claim 5 is a first terminal portion capable of supplying power to the first conductive film in a region inside the outer light emitting region, and a second terminal portion capable of supplying power to the laminate in the inner light emitting region. The organic EL device according to claim 4, comprising:

  According to the configuration of the present invention, the laminated body located in the inner light emitting region and the laminated body located in the outer light emitting region are electrically connected in series, and the laminated body located in the outer light emitting region is connected from the first terminal portion. Since the power can be supplied from the second terminal portion to the laminated body located in the inner light emitting region, each of the inner light emitting region and the outer light emitting region is supplied with power from the inner side (center side) of the outer light emitting region to emit light. Can do. That is, concentrated power supply to the center side of the organic EL device is possible, and it is easy to attach to an existing structure.

  Incidentally, the organic EL device described in Patent Document 1 can only be switched between simple lighting and extinguishing. Therefore, the brightness cannot be adjusted even when there is another light source such as morning sunlight and the lighting device is too bright. Therefore, there is a demand from the user to adjust the brightness when there is another light source such as morning sunlight.

  Therefore, the invention according to claim 6 has an intermediate terminal portion in an area inside the outer light emitting region, and the intermediate terminal portion is electrically connected to the laminate in the inner light emitting region and the laminate in the outer light emitting region. The organic EL device according to claim 5, wherein the organic EL device can be electrically connected to the same potential site.

  According to the configuration of the present invention, the intermediate terminal portion located in the inner region of the outer light emitting region is an electrical connection portion between the stacked body in the inner light emitting region and the stacked body in the outer light emitting region and has the same potential. It is possible to conduct with the part. That is, electricity can be individually supplied to each of the stacked body in the inner light emitting region and the stacked body in the outer light emitting region via the intermediate terminal portion. Specifically, it is possible to cause only the outer light emitting region to emit light by flowing current between the first terminal portion and the intermediate terminal portion, and by flowing current between the intermediate terminal portion and the second terminal portion, Only the inner light emitting region can emit light. Thus, according to the configuration of the present invention, when there is another light source such as morning sunlight, the brightness is obtained by causing one of the outer light emitting region and the inner light emitting region to emit light and the other to be turned off. Can be adjusted.

  By the way, recent lighting devices are required not only to function as direct lighting but also to have additional functions such as enhancing the design of space. However, as described above, since the organic EL device described in Patent Document 1 can only be switched between simple lighting and extinguishing, the lighting device is particularly monotonous lacking a three-dimensional effect without accents, The lighting does not bring out a gorgeous effect.

  Accordingly, the invention described in claim 7 is characterized in that a variable resistor is provided between the intermediate terminal portion and one or more terminals selected from the group selected from the first terminal portion and the second terminal portion. The organic EL device according to claim 6.

According to the configuration of the invention, a variable resistor is provided between the intermediate terminal portion and one or more terminals selected from the group selected from the first terminal portion and the second terminal portion. That is, when a variable resistor is provided between the first terminal portion and the intermediate terminal portion, the outer light emitting region can be dimmed by controlling the resistance value of the variable resistor. When a variable resistor is provided between the second terminal portion and the intermediate terminal portion, the inner light emitting region can be dimmed by controlling the resistance value of the variable resistor.
Thus, the inner light emitting region and the outer light emitting region are relatively adjusted by controlling the resistance value between the first terminal portion and the intermediate terminal portion or the resistance value between the second terminal portion and the intermediate terminal portion. It is possible to light, and it is possible to perform dimming as a whole by controlling the resistance value between the first terminal part and the intermediate terminal part and the resistance value between the second terminal part and the intermediate terminal part It is. Therefore, the interior property by installing the lighting is brought out gorgeously, and the atmosphere of the space in which the lighting is installed can be enhanced.

  The invention according to claim 8 is the organic EL device according to any one of claims 1 to 7, wherein the light emission color of the inner light-emitting region and the light emission color of the outer light-emitting region are different for all lamps.

  According to the configuration of the present invention, since the light emission color of the inner light emitting region and the light emission color of the outer light emitting region are different at all lamps, for example, dimming is performed by dimming at least one of the inner light emitting region and the outer light emitting region. It is possible to obtain a color function. Therefore, the installation space can be made more gorgeous.

  According to the configuration of the present invention, it is possible to easily adapt to an existing space, and it is possible to suppress uneven light emission even when the light emitting area is large.

1 is a perspective view of an organic EL device according to a first embodiment of the present invention. It is AA sectional drawing of the organic electroluminescent apparatus of FIG. It is a cross-sectional perspective view of the organic EL element of FIG. It is explanatory drawing of each area | region at the time of seeing the organic EL apparatus of FIG. 2 from the board | substrate side, and has shown the dot in the site | part which light-emits at the time of all the lights. It is the disassembled perspective view which decomposed | disassembled the electroconductive base material from the organic electroluminescent apparatus of FIG. It is the perspective view seen from the other direction of the electroconductive base material of FIG. It is a disassembled perspective view of the electroconductive base material of FIG. It is explanatory drawing of each manufacturing process of the organic EL apparatus of FIG. 1, (a)-(h) is a top view in each manufacturing process. It is explanatory drawing of each manufacturing process of the organic EL apparatus of FIG. 1, (i)-(m) is a top view in each manufacturing process. It is explanatory drawing at the time of connecting the organic EL apparatus of FIG. 1 to an external power supply, (a) is an electrical circuit diagram, (b) is the figure which further demonstrated (a) using sectional drawing of an organic EL apparatus. It is. It is explanatory drawing of the electric circuit diagram of FIG. 10, (a) is explanatory drawing showing the flow of the electric current at the time of all the lights, (b) further demonstrated (a) using sectional drawing of an organic electroluminescent apparatus. FIG. It is explanatory drawing of the electric circuit diagram of FIG. 10, (a) is explanatory drawing showing the flow of an electric current at the time of lighting only an outer side light emission area | region, (b) is sectional drawing of an organic electroluminescent apparatus. It is the figure further demonstrated using. It is explanatory drawing of the electric circuit diagram of FIG. 10, (a) is explanatory drawing showing the flow of an electric current at the time of lighting only an inner side light emission area | region, (b) is sectional drawing of an organic electroluminescent apparatus. It is the figure further demonstrated using. FIG. 11 is an explanatory diagram of the electric circuit diagram of FIG. 10, (a) is an explanatory diagram showing the flow of current when the luminance of the outer light emitting region is lowered, and (b) is a sectional view of the organic EL device. It is the figure further demonstrated using. It is explanatory drawing of the electric circuit diagram of FIG. 10, (a) is explanatory drawing showing the flow of an electric current at the time of reducing the brightness | luminance of an inner side light emission area | region, (b) is sectional drawing of an organic electroluminescent apparatus. It is the figure further demonstrated using.

Hereinafter, embodiments of the present invention will be described in detail.
In the following description, unless otherwise specified, the vertical positional relationship of the organic EL device 1 will be described with reference to the posture of FIG. In addition, the drawings are drawn extremely as a whole as compared with actual sizes (length, width, thickness) for easy understanding.

The organic EL device 1 of the present embodiment is an organic EL device that is mainly used as a lighting device for a living space.
The organic EL device 1 according to this embodiment includes an organic EL element 10 (laminated body) laminated on a donut-shaped substrate 2 (base material) as shown in FIGS. Layer 7 (sealing layer) is laminated and sealed. Furthermore, the conductive base material 11 is placed on the inorganic sealing layer 7 and bonded with the soft adhesive layer 8 and the hard adhesive layer 9. In the organic EL device 1, the conductive substrate 11 and the organic EL element 10 are electrically connected by the extraction electrodes 13, 14, and 15 as shown in FIGS. 2 and 3.
As shown in FIG. 2, the organic EL element 10 is formed by laminating a first electrode layer 3, a functional layer 5, and a second electrode layer 6 in this order from the light-transmitting substrate 2 side. In the organic EL device of the present embodiment, a so-called bottom emission method in which light is extracted from the substrate 2 side is adopted.

  The organic EL device 1 according to the present embodiment has a light emitting area 20 that emits light when all the lamps are in the plane and a non-light emitting area 21 that does not emit light when all the lights are in the plane when the substrate 2 is viewed in plan as shown in FIG. And have.

The light emitting region 20 is a region corresponding to the overlapping portion of the first electrode layer 3, the functional layer 5, and the second electrode layer 6 as shown in FIG.
The light emitting region 20 is formed of an inner light emitting region 22 located on the center side and an outer light emitting region 23 located outside the inner light emitting region 22 as shown in FIGS.
The inner light emitting region 22 and the outer light emitting region 23 each contain the organic EL element 10.
The inner light emitting region 22 is an annular region continuous in the circumferential direction along the central opening 12 located at the center of the substrate 2 as shown in FIG. The inner light emitting region 22 has a predetermined width and expands in the inner and outer directions (radial direction) like a donut.

The outer light emitting region 23 is an annular region that is continuous in the circumferential direction so as to surround the inner light emitting region 22. The outer light emitting region 23 also has a predetermined width and expands in the inner and outer directions (radial direction) like a donut.
The center of the outer light emitting region 23 is concentric with the center of the inner light emitting region 22 and is concentric with the opening center of the central opening 12 of the substrate 2.
The light emitting area Si of the inner light emitting region 22 is preferably 0.8 to 1.2 times the light emitting area So of the outer light emitting region 23, more preferably 0.85 to 1.15 times. preferable.

As shown in FIG. 4, the non-light emitting region 21 includes an inner power feeding region 25 positioned further inside the inner light emitting region 22, an intermediate power feeding region 26 positioned between the inner light emitting region 22 and the outer light emitting region 23, and an outer side. The outer power feeding region 27 is located further outside the light emitting region 23.
The inner power supply region 25 is a region that assumes a cathode function when supplying power to the light emitting region 20.
The intermediate power feeding region 26 is a region that electrically connects the inner light emitting region 22 and the outer light emitting region 23. The intermediate power supply region 26 is a region that is continuous in the circumferential direction so as to be surrounded along the outer edge of the inner light emitting region 22, and is a region that is continuous along the inner edge of the outer light emitting region 23.
The outer power supply region 27 is a region that performs an anode function when supplying power to the light emitting region 20. The outer power feeding region 27 is a region that is continuous in the circumferential direction so as to surround the outer edge of the outer light emitting region 23, and is a region that extends along the edge of the substrate 2.

The area of the inner power feeding region 25 is preferably 1/50 or more and 1/10 or less of the area Si of the inner light emitting region 22. That is, it is preferable that the area of the inner power feeding region 25 is considerably smaller than the area Si of the inner light emitting region 22 and the area So of the outer light emitting region 23.
The area of the intermediate power supply region 26 is preferably 1/50 or more and 1/10 or less of the area Si of the inner light emitting region 22. That is, it is preferable that the area of the intermediate power feeding region 26 is considerably smaller than the area Si of the inner light emitting region 22 and the area So of the outer light emitting region 23.
The area of the outer power feeding region 27 is preferably 1/50 or more and 1/10 or less of the area Si of the inner light emitting region 22. That is, it is preferable that the area of the outer power feeding region 27 is considerably smaller than the area Si of the inner light emitting region 22 and the area So of the outer light emitting region 23.
In this way, the frame can be narrowed by making the areas of the inner power supply region 25, the intermediate power supply region 26, and the outer power supply region 27 smaller than the area Si of the inner light emitting region 22 and the area So of the outer light emitting region 23, respectively. And a sufficient light emitting area can be secured.

Hereinafter, the laminated structure of the organic EL device 1 will be described, and each layer configuration of the organic EL device 1 will be described later.
As described above, both the inner light emitting region 22 and the outer light emitting region 23 contain the organic EL element 10, and the organic EL element 10 in the inner light emitting region 22 and the organic EL element 10 in the outer light emitting region 23 are included. In the following description, the organic EL element 10 in the inner light emitting region 22 is represented as an organic EL element 10a, and the organic EL element 10 in the outer light emitting region 23 is represented as an organic EL element 10b.

As described above, in the organic EL device 1, most of the organic EL elements 10 are stacked on the substrate 2, and the inorganic sealing layer 7 (sealing layer) is stacked so as to cover the organic EL elements 10. 2 and divided into a plurality of grooves by a plurality of grooves having different depths as shown in FIG.
Specifically, the organic EL device 1 includes first electrode separation grooves 30 and 31 in which the first electrode layer 3 is partially removed as shown in FIG. 2 and electrode connection grooves 32 in which the functional layer 5 is partially removed. , 33, region separation grooves 34, 35, 36 in which both the second electrode layer 6 and the functional layer 5 are partially removed, and the functional layer 5, the second electrode layer 6, and the inorganic sealing layer 7 are partially formed. The removed extraction electrode connection grooves 37, 38, 39 are separated into a plurality of sections by these grooves.

Describing each groove in detail, the first electrode separation grooves 30 and 31 are grooves for separating the first electrode layer 3 stacked on the substrate 2 as shown in FIG.
The first electrode separation groove 30 is a groove that separates the inner power feeding region 25 and the inner light emitting region 22.
The first electrode separation groove 31 is a groove that separates the intermediate power feeding region 26 and the outer light emitting region 23.
The first electrode separation grooves 30 and 31 are formed in an annular shape around the central opening 12 located at the center of the substrate 2 as shown in FIG.
In addition, a part of the functional layer 5 straddling the inner feeding region 25 and the inner light emitting region 22 enters the first electrode separation groove 30 as shown in FIG. In direct contact with the substrate 2 at the bottom of 30. A part of the functional layer 5 straddling the intermediate power feeding region 26 and the outer light emitting region 23 enters the first electrode separation groove 31 as shown in FIG. It is in direct contact with the substrate 2 at the bottom.

The electrode connection grooves 32 and 33 are grooves for separating only the functional layer 5 into a plurality of regions as shown in FIGS. Further, as shown in FIG. 2, the electrode connection groove 32 includes a second electrode layer 6 extending from the organic EL element 10 a in the inner light emitting region 22 and a first electrode layer 3 in the inner power feeding region 25 in the inner power feeding region 25. It is a groove that physically connects.
As shown in FIG. 8D, the electrode connection groove 32 is formed inside the first electrode separation groove 30 and has an annular shape centering on the center of the substrate 2, and is concentric with the first electrode separation groove 30. Is formed.

As shown in FIG. 2, the electrode connection groove 33 includes a second electrode layer 6 extending from the organic EL element 10 b in the outer light emitting region 23 and a first electrode extending from the organic EL element 10 a in the inner light emitting region 22 in the intermediate power supply region 26. It is a groove for physically connecting one electrode layer 3. That is, it is a groove that electrically connects the organic EL element 10b in the outer light emitting region 23 and the organic EL element 10a in the inner light emitting region 22 in series.
The electrode connection groove 33 connects the second electrode layer 6 extending from the organic EL element 10 b in the outer light emitting region 23 and the first electrode layer 3 extending from the organic EL element 10 a in the inner light emitting region 22 in the intermediate power feeding region 26. It is possible to make the said contact site | part the same electric potential by making it contact.
The electrode connection groove 33 is formed in an annular shape around the center of the substrate 2 inside the first electrode separation groove 31 as shown in FIG. 8D, and is concentric with the first electrode separation groove 31. Is formed.

The region separation grooves 34, 35, and 36 are grooves that separate both the functional layer 5 and the second electrode layer 6 into a plurality of regions as shown in FIGS. The region separation groove 34 is a groove that functions as a connection portion between the inorganic sealing layer 7 and the first electrode layer 3.
As shown in FIGS. 2 and 8 (f), the region separation groove 34 is formed inside the electrode connection groove 32 in an annular shape with the center of the substrate 2 as the center, and is concentric with the electrode connection groove 32. Is formed. The region separation groove 34 is along the inner edge of the central opening 12 of the substrate 2 and can be said to be a notch.
The region separating groove 35 is a groove that separates into the inner light emitting region 22 and the intermediate power feeding region 26 as shown in FIGS.
The region separation groove 35 is formed in an annular shape inside the electrode connection groove 33, centering on the center of the substrate 2, and concentrically with the electrode connection groove 33.
The region separating groove 36 is a groove that separates the outer light emitting region 23 and the outer power feeding region 27 as shown in FIGS.
The region separation groove 36 is located in the vicinity of the outer peripheral edge of the substrate 2 and is formed in an annular shape with the center of the substrate 2 as the center.

  Further, a part of the inorganic sealing layer 7 enters the region separation grooves 34, 35, and 36 as shown in FIG. 2, and the inorganic sealing layer 7 is located at the bottom of the region separation grooves 34, 35, and 36. Each is in direct contact with the first electrode layer 3. That is, the region separation groove 35 electrically connects the second electrode layer 6 in the inner light emitting region 22 and the second electrode layer 6 straddling the outer light emitting region 23 to the intermediate power feeding region 26 by the inorganic sealing layer 7. Separated. The region separation groove 36 electrically separates the second electrode layer 6 in the outer light emitting region 23 from the second electrode layer 6 in the outer power feeding region 27 by the inorganic sealing layer 7.

The extraction electrode connection grooves 37, 38, and 39 are grooves that separate the functional layer 5, the second electrode layer 6, and the inorganic sealing layer 7 into a plurality of regions as shown in FIGS.
The extraction electrode connection groove 37 is a groove provided in a portion where the first electrode layer 3 and the second electrode layer 6 are at the same potential in the inner power feeding region 25 as shown in FIGS. 2 and 9 (i). is there. Specifically, the extraction electrode connection groove 37 is formed in an annular shape centering on the center of the substrate 2, and is a boundary portion between the electrode connection groove 32 and the region separation groove 34 and is concentric with the electrode connection groove 32. Is formed.
The extraction electrode connection groove 38 is a groove provided in a portion where the first electrode layer 3 and the second electrode layer 6 are at the same potential in the intermediate power supply region 26 as shown in FIGS. is there. Specifically, the extraction electrode connection groove 38 is formed in an annular shape with the center of the substrate 2 as the center, and is formed concentrically with the electrode connection groove 33 so as to partially overlap the electrode connection groove 33. Has been.
The extraction electrode connection groove 39 is a groove provided in a portion in the outer power feeding region 27 as shown in FIGS. 2 and 9 (i), where the first electrode layer 3 and the second electrode layer 6 have the same potential. is there. Specifically, the extraction electrode connection groove 39 is formed in an annular shape around the center of the substrate 2, and is formed outside the region separation groove 36 and concentrically with the region separation groove 36.

  In addition, the extraction electrodes 13, 14, and 15 can be mounted in the extraction electrode connection grooves 37, 38, and 39. By mounting the extraction electrodes 13, 14, and 15, the respective power supply regions 25 and 26 are provided. , 27 can supply power to the first electrode layer 3 and / or the second electrode layer 6.

  The positional relationship between the grooves will be described. The organic EL device 1 includes the region separation groove 34, the extraction electrode connection groove 37, the electrode connection groove 32, the first electrode separation groove 30, and the region separation from the central opening 12 side toward the outside. The groove 35, the extraction electrode connection groove 38, the electrode connection groove 33, the first electrode separation groove 31, the region separation groove 36, and the extraction electrode connection groove 39 are formed concentrically in this order.

  As described above, in the organic EL device 1, all the grooves are concentrically formed.

When attention is paid to the layer further above the organic EL element 10, the organic EL device 1 has the conductive base material 11 placed on the inorganic sealing layer 7 as described above, and the soft adhesive layer 8, hard adhesive Bonded with layer 9.
As shown in FIG. 5, the soft adhesive layer 8 is formed of a plate-like or sheet-like adhesive, and adheres the conductive substrate 11 and the inorganic sealing layer 7.
The soft adhesive layer 8 is formed of an inner soft adhesive layer 28 that covers most of the inner light emitting region 22 and an outer soft adhesive layer 29 that covers most of the outer light emitting region 23 as shown in FIGS.
The inner soft adhesive layer 28 has an annular shape centered on the central opening 12 of the substrate 2.
The outer soft adhesive layer 29 is outside the inner soft adhesive layer 28 and has an annular shape concentric with the inner soft adhesive layer 28.
In the present embodiment, as shown in FIG. 2, the inner soft adhesive layer 28 covers the entire projection surface in the member thickness direction of the organic EL element 10a in the inner light emitting region 22, and the outer soft adhesive layer 29 The projection surface in the member thickness direction of the organic EL element 10b in the light emitting region 23 is entirely covered.

The hard adhesive layer 9 is formed by curing a fluid adhesive, and adheres the substrate 2 and the conductive base material 11 as shown in FIG.
The hard adhesive layer 9 includes an inner hard adhesive layer 16 that covers a part of the extraction electrode 13, an intermediate hard adhesive layer 17 that covers a part of the extraction electrode 14, and an outer hard adhesive layer 18 that covers a part of the extraction electrode 15. Is formed.

As shown in FIG. 5, the inner hard adhesive layer 16 is provided from the inner peripheral edge of the inner soft adhesive layer 28 to the central opening 12 of the substrate 2, and a part of the inner peripheral edge of the inner soft adhesive layer 28 and the extraction electrode 13 are provided. A part of is covered. The inner surface of the extraction electrode 13 is exposed to the central opening 12 side.
The intermediate hard adhesive layer 17 covers the outer peripheral surface of the extraction electrode 14 located between the inner soft adhesive layer 28 and the outer soft adhesive layer 29 as shown in FIG. In other words, the intermediate hard adhesive layer 17 is taken out and the extraction electrode 14 is inserted.
As shown in FIG. 5, the outer hard adhesive layer 18 is provided from the outer peripheral edge of the outer soft adhesive layer 29 to the outer periphery of the substrate 2, and a part of the outer peripheral edge of the outer soft adhesive layer 29 and one of the extraction electrodes 15. The part is covered.

  As shown in FIGS. 5 and 7, the conductive base material 11 includes a second conductive film 44, a second insulating film 43, a first conductive film 42, and a first insulating film 41 that are stacked in order from the substrate 2 side. Has been formed.

A first exposed portion 45 in which the first conductive film 42 is exposed from the first insulating film 41 as shown in FIGS. There is a second exposed portion 46 where the second conductive film 44 is exposed from the insulating film 43.
The second exposed portion 46 is formed along the edge of the central opening 12 of the substrate 2.
The first exposed portion 45 is formed outside the second exposed portion 46 so as to surround the second exposed portion 46. The first exposed portion 45 and the second exposed portion 46 are spaced apart by a second insulating film 43, and the first exposed portion 45 and the second exposed portion 46 are insulated.
Both the first exposed portion 45 and the second exposed portion 46 are concentric rings centering on the center of the substrate.

On the other surface (substrate 2 side) of the conductive substrate 11, the third exposed portion 47 where the second conductive film 44 is exposed as shown in FIG. 6 and the first conductive film 42 is exposed from the second insulating film 43. The fourth exposed portion 48 is present.
The third exposed portion 47 is formed by exposing the entire lower surface of the second conductive film 44.
The fourth exposed portion 48 is formed by exposing a part of the first conductive film 42 through the opening 49 (see FIG. 7) of the second insulating film 43.
When the organic EL device 1 is assembled as shown in FIG. 1, the third exposed portion 47 is positioned on the projection surface in the member thickness direction of the extraction electrode connection groove 38 as shown in FIG. Direct contact. The fourth exposed portion 48 is located on the projection surface of the extraction electrode connection groove 39 in the member thickness direction, and the extraction electrode 15 is in direct contact therewith.
As described above, the first conductive film 42 can be electrically connected to the extraction electrode 15, and the second conductive film 44 can be electrically connected to the extraction electrode 14.

2 and 6, the second conductive film 44 has a part of the lower surface (substrate 2 side) between the inner soft adhesive layer 28 and the intermediate hard adhesive layer 17 and between the outer soft adhesive layer 29 and the intermediate hard adhesive. The inorganic sealing layer 7 is in contact with the layer 17. That is, the outer side of the intermediate hard adhesive layer 17 depends on the entry sites between the inner soft adhesive layer 28 and the intermediate hard adhesive layer 17 and between the outer soft adhesive layer 29 and the intermediate hard adhesive layer 17 of the second conductive film 44. The entrance route for water, etc. is blocked. Therefore, the sealing performance is high.
In addition, in FIG. 2 etc., since it draws extremely on the relationship of drawing, it seems that a part of 2nd conductive film 44 becomes a protrusion, but in fact, the 1st conductive film like FIG. The film 42 and the second conductive film 44 are smooth films.

  Subsequently, each layer configuration of the organic EL device 1 will be described.

The board | substrate 2 has translucency and insulation. The material of the substrate 2 is not particularly limited, and is appropriately selected from, for example, a flexible film substrate or a plastic substrate. In particular, a glass substrate or a transparent film substrate is preferable in terms of transparency and good workability.
The substrate 2 has a circular or elliptical shape, and is preferably circular. In this embodiment, a circular glass substrate is employed.
And the board | substrate 2 is provided with the through-hole penetrated in the member thickness direction in the center, and the center opening 12 is formed. The opening shape of the central opening 12 is similar to the substrate or circular.

The material of the first electrode layer 3 is not particularly limited as long as it is transparent and has conductivity. For example, indium tin oxide (ITO), indium zinc oxide (IZO), oxidation Transparent conductive oxides such as tin (SnO ₂ ) and zinc oxide (ZnO) are employed. In this embodiment, ITO is adopted.

  The functional layer 5 is a layer provided between the first electrode layer 3 and the second electrode layer 6 and having at least one light emitting layer. The functional layer 5 is composed of a plurality of layers mainly made of organic compounds. The functional layer 5 can be formed of a known material such as a low molecular dye material or a conjugated polymer material used in a general organic EL device. In addition, the functional layer 5 may have a multilayer structure including a plurality of layers such as a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, and an electron injection layer.

The material of the 2nd electrode layer 6 is not specifically limited, For example, metals, such as silver (Ag) and aluminum (Al), are mentioned. The second electrode layer 6 of this embodiment is made of Al. These materials are preferably deposited by sputtering or vacuum evaporation.
In addition, the electrical conductivity and thermal conductivity of the second electrode layer 6 are larger than those of the first electrode layer 3. In other words, the second electrode layer 6 has higher electrical conductivity and thermal conductivity than the first electrode layer 3.

The material of the inorganic sealing layer 7 is not particularly limited as long as it has insulating properties and sealing properties, but one or more elements selected from oxygen, carbon, and nitrogen, and silicon It is preferably formed of a silicon alloy composed of an element, and silicon nitride or silicon oxide containing a bond such as Si—O, Si—N, Si—H, or N—H, and an oxynitride that is an intermediate solid solution of both. Particularly preferred is silicon.
The inorganic sealing layer 7 is preferably a layer in which compressive stress is generated in a direction away from the organic EL element 10 under predetermined conditions.
Here, the “predetermined condition” refers to a case where a pressing force generated due to thermal expansion or the like of the organic EL element 10 is received.

In this embodiment, an inorganic sealing layer having a multilayer structure is used.
Specifically, the inorganic sealing layer 7 includes a first inorganic sealing layer 50 formed by a dry method from the organic EL element 10 side as shown in FIG. 2 and a second inorganic sealing layer formed by a wet method. 51 are laminated in this order.

  The first inorganic sealing layer 50 is a layer formed by chemical vapor deposition, and more specifically, a layer formed by plasma CVD using silane gas, ammonia gas, or the like as a raw material. Since the 1st inorganic sealing layer 50 can be formed into a film continuously in the formation process of the organic EL element 10 in an atmosphere with a low moisture content in the manufacturing process of the organic EL device 1 as will be described later, Film formation can be performed without exposure, and the occurrence of initial dark spots immediately after use can be reduced.

The second inorganic sealing layer 51 is a layer formed through a chemical reaction after applying a liquid or gel material. More specifically, the second inorganic sealing layer 51 is made of dense silica. The second inorganic sealing layer 51 is preferably made from a polysilazane derivative. In the case where the second inorganic sealing layer 51 is formed by silica conversion using a polysilazane derivative, weight increase occurs during silica conversion, and volume shrinkage is small. Further, it is possible to make cracks sufficiently at a temperature that the resin can withstand when the silica film is converted (solidified).
Here, the polysilazane derivative is a polymer having a silicon-nitrogen bond, such as SiO ₂ , Si ₃ N _{4 made of} Si—N, Si—H, N—H, etc., and a ceramic such as an intermediate solid solution SiOxNy of both. It is a precursor polymer. The polysilazane derivative also includes a derivative in which a hydrogen part bonded to Si is partially substituted with an alkyl group or the like.
Among the polysilazane derivatives, perhydropolysilazane in which all side chains are hydrogen, and derivatives in which a hydrogen part bonded to silicon is partially substituted with a methyl group are particularly preferable.

  Moreover, it is preferable to apply and use this polysilazane derivative in the solution state melt | dissolved in the organic solvent. As the organic solvent to be dissolved, hydrocarbon solvents such as aliphatic hydrocarbons, alicyclic hydrocarbons and aromatic hydrocarbons, ethers such as halogenated hydrocarbon solvents, aliphatic ethers and alicyclic ethers can be used. .

  The second inorganic sealing layer 51 is formed by laminating a material different from that of the first inorganic sealing layer 50 as the sealing layer. Generation of dark spots can be prevented, and the expansion of the generated dark spots can be suppressed.

The average thickness of the inorganic sealing layer 7 is preferably 1 μm to 10 μm, and more preferably 2 μm to 5 μm.
The thickness of the first inorganic sealing layer 50 serving as a part of the inorganic sealing layer 7 is preferably 1 μm to 5 μm, and more preferably 1 μm to 2 μm.
The thickness of the second inorganic sealing layer 51 that bears a part of the inorganic sealing layer 7 is preferably 1 μm to 5 μm, and more preferably 1 μm to 3 μm.

When the eyes are moved to the soft adhesive layer 8, the soft adhesive layer 8 is a layer that has flexibility and undergoes plastic deformation or elastic deformation under a predetermined condition. In the present embodiment, when the soft adhesive layer 8 receives a compressive stress or the like of the inorganic sealing layer 7, the soft adhesive layer 8 can be plastically deformed hardly against the stress.
As for the Shore hardness of the soft adhesive layer 8 according to JIS K 6253, the Shore hardness is A30 or more and A70 or less, preferably A40 or more and A65 or less, and more preferably A45 or more and A63 or less.
When the shore hardness of the soft adhesive layer 8 is greater than A70, the rigidity of the soft adhesive layer 8 is too large to sufficiently absorb swelling and impact. In addition, when the conductive base material 11 having a low rigidity, such as a film, is used, the shape of the conductive base material 11 cannot be maintained if the shore hardness of the soft adhesive layer 8 is smaller than A30.
The flexural modulus of the soft adhesive layer 8 is preferably 3 MPa or more and 30 MPa or less, more preferably 3 MPa or more and 25 Pa or less, and particularly preferably 3.9 MPa or more and 23 MPa or less.

Specific materials for the soft adhesive layer 8 include acrylic rubber (ACM), ethylene propylene rubber (EPM, EPDM), silicone rubber (Q), butyl rubber (IIR), styrene-butadiene rubber (SBR), and butadiene rubber (BR). ), Fluoro rubber (FKM), nitrile rubber (NBR), isoprene rubber (IR), urethane rubber (U), chlorosulfonated polyethylene (CSM), epichlorohydrin rubber (CO, ECO), chloroprene rubber (CR), etc. One or more materials selected from acrylic rubber-based resins, ethylene-propylene rubber-based resins, silicone rubber-based resins, and butyl rubber-based resins can be used, although they have a certain water vapor barrier property and are available at low cost. In particular, butyl rubber, which is easily available as a film, is preferable. System resin is more preferable.
Note that the inner soft adhesive layer 28 and the outer soft adhesive layer 29 of this embodiment both employ a butyl rubber resin adhesive.
Moreover, the soft adhesive layer 8 has adhesiveness, and a plurality of members can be bonded to each other. The soft adhesive layer 8 of this embodiment is a sheet-like or plate-like member as described above, and the surface is subjected to adhesive processing.

The hard adhesive layer 9 is a hard material that is higher in rigidity than the soft adhesive layer 8.
Specifically, each of the hard adhesive layers 9 has a Shore hardness according to JIS K 6253 (and a corresponding approximate value of flexural modulus) of Shore A 80 or more, that is, Shore D 30 or more (25 MPa or more). From the viewpoint of providing a more reliable organic EL device, Shore D55 or higher (250 MPa or higher), Shore D95 or lower (6000 MPa or lower) is more preferable, Shore D80 or higher (1500 MPa or higher), Shore D90 or lower More preferably (4000 MPa or less).

In addition, the hard adhesive layer 9 has both waterproofness and adhesiveness (adhesiveness), and a plurality of members can be bonded to each other. Specifically, each of the hard adhesive layers 9 of the present embodiment is formed by solidifying a solution or a gel-like fluid.
As a specific material of the hard adhesive layer 9, for example, an epoxy resin can be employed.
In the inner hard adhesive layer 16, the intermediate hard adhesive layer 17, and the outer hard adhesive layer 18 of this embodiment, all employ an epoxy resin (epoxy adhesive).

The conductive substrate 11 is a plate-like or sheet-like member having moisture resistance and conductivity, and is a substrate provided with a current conduction path. That is, the conductive substrate 11 is a member that functions as a power feeding member for the organic EL element 10.
As described above, the conductive base material 11 includes the foil-shaped first insulating film 41, the foil-shaped first conductive film 42, the foil-shaped second insulating film 43, and the foil-shaped second conductive film 44. Laminated.

  The material of the 1st conductive film 42 and the 2nd conductive film 44 will not be specifically limited if it has soaking | uniform-heating property or heat dissipation, and water vapor | steam barrier property, For example, copper, aluminum, stainless steel, etc. can be employ | adopted. Of these, aluminum is preferable. In addition, aluminum has corrosion resistance, high heat conductivity, and therefore has a high heat transfer function, and also has a low moisture permeability and therefore has a high sealing function. Therefore, in the present embodiment, aluminum foil is employed as the first conductive film 42 and the second conductive film 44.

  The material of the first insulating film 41 and the second insulating film 43 is not particularly limited as long as it has insulating properties, but from the viewpoint of high sealing properties, polyethylene terephthalate (PET) and polyvinylidene chloride (PVDC) ) And polytetrafluoroethylene (PTFE).

In the present embodiment, the conductive base material 11 covers at least the inner light emitting region 22, the intermediate power feeding region 26, and the outer light emitting region 23 as shown in FIG. A part or all of the outer power feeding region 27 is covered. In this embodiment, the conductive base material 11 is laid on the entire surface of the substrate 2 as shown in FIG.
Therefore, the conductive base material 11 can equalize the heat of the entire inner light emitting region 22 and the outer light emitting region 23 by the soaking function of the first conductive film 42 and the second conductive film 44. Further, the occurrence of uneven light emission in the outer light emitting region 23 can be prevented.
In addition, since the conductive base material 11 extends to the inner power supply region 25 and the outer power supply region 27, the distance between the outside and the organic EL elements 10 in the inner light emitting region 22 and the outer light emitting region 23 is increased. It is possible to effectively prevent water or the like from entering the organic EL element 10 in the inner light emitting region 22 and the outer light emitting region 23.

  When the eyes are moved to the extraction electrodes 13, 14, 15, the extraction electrodes 13, 14, 15 are plate-like or foil-like members having conductivity, and the organic EL element 10 and the conductive substrate 11 are electrically connected. It is a member to connect. When the substrate 2 is viewed in plan, the extraction electrodes 13, 14, 15 are all in an annular shape as shown in FIG. 5 and are concentric.

  The material of the extraction electrodes 13, 14, 15 is not particularly limited as long as it has electrical conductivity. For example, copper, aluminum, stainless steel, etc. can be adopted, and among these, it is preferable that the material is formed of copper. .

Next, a method for manufacturing the organic EL device 1 according to this embodiment will be described.
The organic EL device 1 is manufactured by forming a film using a vacuum vapor deposition device and a CVD device (not shown), and patterning using a patterning device (not shown), in this embodiment, a laser scribing device.

First, the organic EL element formation process which laminates | stacks the organic EL element 10 is performed.
Specifically, first, the first electrode layer 3 is formed on most of the substrate 2 by sputtering or CVD (FIG. 8A).

Thereafter, first electrode separation grooves 30 and 31 are formed on the substrate on which the first electrode layer 3 is formed by a laser scribing device (FIGS. 8A to 8B).
At this time, the first electrode separation grooves 30 and 31 are formed in parallel with the outer peripheral edge of the first electrode layer 3, and are formed on an arc concentric with the center of the substrate 2. Further, the substrate 2 is exposed from the bottom of the first electrode separation grooves 30 and 31.

Next, a hole injection layer, a hole transport layer, a light-emitting layer, an electron transport layer, an electron injection layer, and the like are sequentially stacked on this substrate by a vacuum deposition apparatus to form a functional layer 5 (FIG. 8C) ).
At this time, the functional layer 5 is stacked and filled in the first electrode separation grooves 30 and 31.

Thereafter, electrode connection grooves 32 and 33 are formed on the substrate on which the functional layer 5 is formed by a laser scribing device (FIGS. 8C to 8D).
At this time, the electrode connection grooves 32 and 33 are formed concentrically with the center of the substrate 2. The electrode connection groove 32 is formed in the intermediate power supply region 26 when the organic EL device 1 is formed, and the electrode connection groove 33 is formed in the inner power supply region 25 when the organic EL device 1 is formed. Yes. The electrode connection grooves 32 and 33 extend parallel to the outer peripheral edge of the substrate 2 in the circumferential direction. The first electrode layer 3 is exposed from the bottom of the electrode connection grooves 32 and 33.

Thereafter, the second electrode layer 6 is formed on almost the entire surface of the substrate on which the functional layer 5 is formed by using a vacuum vapor deposition apparatus (FIG. 8E).
At this time, the second electrode layer 6 is fixed in contact with the first electrode layer 3 in the inner feeding region 25 and the first electrode layer 3 in the intermediate feeding region 26, and the first electrode in the inner feeding region 25 is fixed. The layer 3 and the second electrode layer 6 are physically connected to the first electrode layer 3 and the second electrode layer 6 in the intermediate feeding region 26, respectively. The second electrode layer 6 is stacked and filled in the electrode connection grooves 32 and 33.

Thereafter, region separation grooves 34, 35, and 36 are formed on the substrate on which the second electrode layer 6 is formed by a laser scribing device (FIGS. 8E to 8F).
At this time, the region separation grooves 34, 35, and 36 are all formed concentrically. The first electrode layer 3 is exposed from the bottom of the region separation grooves 34, 35, 36.
The above is the organic EL element forming step.

Then, the inorganic sealing layer lamination process which forms the inorganic sealing layer 7 is performed.
First, a part of the substrate is covered with a mask, and the first inorganic sealing layer 50 is formed by a CVD apparatus (FIG. 8G).
At this time, the first inorganic sealing layer 50 covers at least the second electrode layer 6 in the inner light emitting region 22 and the outer light emitting region 23, and further on the projection surface in the member thickness direction of the region separation grooves 34 and 36. It extends to. That is, the first inorganic sealing layer 50 is stacked and filled in the region separation grooves 34, 35, and 36. Therefore, a sufficient sealing function can be ensured.

Thereafter, the first inorganic sealing layer 50 is taken out from the CVD apparatus, and the raw material of the second inorganic sealing layer 51 is applied to form the second inorganic sealing layer 51, whereby the inorganic sealing layer 7 is formed. (FIG. 8 (h)).
At this time, the second inorganic sealing layer 51 covers the entire surface of the first inorganic sealing layer 50.
Thus, the 2nd inorganic sealing layer 51 is laminated | stacked on the 1st inorganic sealing layer 50, and the inorganic sealing layer 7 is formed.

  Subsequently, an extraction electrode mounting step of mounting the extraction electrodes 13, 14, and 15 on the substrate formed by the above-described procedure is performed.

First, extraction electrode connection grooves 37, 38, and 39 are formed on the substrate on which the inorganic sealing layer 7 is formed by a laser scribing device (FIG. 9 (i)).
At this time, the extraction electrode connection groove 37 is located in the inner power feeding region 25 and is formed away from the electrode connection groove 32. The extraction electrode connection groove 38 is located in the intermediate power supply region 26 and is formed so as to partially overlap the electrode connection groove 33. That is, there is a portion where the second electrode layer 6 is exposed on the inner walls of the extraction electrode connection grooves 37 and 38. The first electrode layer 3 is exposed at the bottom of the extraction electrode connection grooves 37, 38, 39.
The extraction electrode connection groove 39 is located in the outer power feeding region 27 and is formed away from the region separation groove 36.

Thereafter, annular extraction electrodes 13, 14, and 15 are mounted in the extraction electrode connection grooves 37, 38, and 39, respectively (FIG. 9 (j)).
At this time, a part of the extraction electrodes 13, 14, 15 protrudes from the extraction electrode connection grooves 37, 38, 39.

Thereafter, the extraction electrode 13 positioned on the central opening 12 side of the substrate is bent inward (on the central opening 12 side), and a part of the extraction electrode 13 is exposed on the projection surface of the central opening 12.
At this time, a part of the upper surface of the inorganic sealing layer 7 in the inner power feeding region 25 is covered with the extraction electrode 13.

Then, the electroconductive base material connection process which connects the electroconductive base material 11 to the extraction electrodes 13, 14, and 15 formed by the above-mentioned procedure is performed.
In the conductive base material connection step, the conductive base material 11 is bonded to the inorganic sealing layer 7 by the soft adhesive layer 8 and the hard adhesive layer 9, and the conductive base material 11 and the extraction electrodes 13, 14, 15 are connected.
Specifically, the inner soft adhesive layer 28 and the outer soft adhesive layer 29 are bonded to the inorganic sealing layer 7 with a vacuum laminator, and the inner hard adhesive layer 16, the intermediate hard adhesive layer 17, and the outer hard adhesive layer 18 are bonded. The raw material is applied by a dispenser (FIG. 9 (k) to FIG. 9 (l)).
Then, by another process, the conductive base material 11 in which the first conductive film 42, the first insulating film 41, the second conductive film 44, and the second insulating film 43 are integrated is placed and attached by laminating (see FIG. 9 (m)).
At this time, the first conductive film 42 is electrically connected to the extraction electrode 15 by direct contact with the fourth exposed portion 48, and the second conductive film 44 is connected to the extraction electrode 14 by the third exposed portion 47. They are electrically connected by direct contact.
A bent portion of the extraction electrode 13 is exposed to the central opening 12 side of the substrate, and the second exposed portion 46 is exposed on the projection surface of the extraction electrode connection groove 37 in the member thickness direction. Further, the first exposed portion 45 is exposed on the projection surface of the inner light emitting region 22 in the member thickness direction.

  In this way, the conductive substrate connecting step is completed, and an electric circuit described later is connected to complete the organic EL device 1.

Finally, the current flow when the organic EL device 1 of the present embodiment is connected to an external power source as shown in FIG. 10 will be described.
First, the connection relationship of the electric circuit built in the organic EL device 1 of the present embodiment will be described. As shown in FIG. 10, the first wiring 55 connected to the anode of the external power source is connected to the first exposed portion 45. A second wiring 56 connected to the cathode of the external power source is connected to the exposed portion of the extraction electrode 13. That is, a closed circuit of the external power supply, the first wiring 55, the organic EL element 10b in the outer light emitting region 23, the organic EL element 10a in the inner light emitting region 22, and the second wiring 56 is formed.
The third wiring 57 is connected to the second exposed portion 46. The third wiring 57 is at the end opposite to the connection portion with the second exposed portion 46, the first branch wiring 59 connected to the first wiring 55, and the second branch wiring connected to the second wiring 56. Branching to 60.
A first variable resistor 53 is provided in the middle flow direction of the first branch wiring 59 in the electricity flow direction, and a second variable resistor 54 is provided in the middle flow direction of the second branch wiring 60 in the electricity flow direction.
That is, the first variable resistor 53 is electrically in parallel with the organic EL element 10b in the outer light emitting region 23, and the second variable resistor 54 is electrically connected to the organic EL element 10a in the inner light emitting region 22. In parallel.
The first variable resistor 53 is a resistor whose resistance value can be changed, and is a known variable resistor.
The second variable resistor 54 is a resistor whose resistance value can be changed, and is a known variable resistor.

Next, the flow of electricity during all lighting will be described.
That is, the flow of current when the resistance values of the first variable resistor 53 and the second variable resistor 54 are maximized will be described. The current supplied from the external power source is first from the first wiring 55 as shown in FIG. It reaches the exposed portion 45, passes through the first conductive film 42 from the first exposed portion 45, and reaches the extraction electrode 15 in the outer power feeding region 27. The current reaching the extraction electrode 15 in the outer power feeding region 27 reaches the outer light emitting region 23 via the first electrode layer 3, and the first electrode layer 3 passes through the functional layer 5 in the outer light emitting region 23. It is transmitted to the two-electrode layer 6. At this time, the functional layer 5 of the organic EL element 10b emits light, and the entire outer light emitting region 23 emits light.
The current reaching the second electrode layer 6 in the outer light emitting region 23 passes through the electrode connection groove 33 (or the extraction electrode 14) from the second electrode layer 6 to the first electrode layer 3 in the intermediate feeding region 26. It is transmitted. The intermediate power supply region 26 reaches the inner light emitting region 22 through the first electrode layer 3, and is transmitted from the first electrode layer 3 to the second electrode layer 6 through the functional layer 5 in the inner light emitting region 22. At this time, the functional layer 5 in the organic EL element 10a emits light, and the entire inner light emitting region 22 emits light.
The current reaching the second electrode layer 6 in the inner light emitting region 22 is transmitted to the inner power feeding region 25 through the second electrode layer 6 and from the second electrode layer 6 in the inner power feeding region 25 through the extraction electrode 13. It is transmitted to the second wiring 56 and returns to the external power source.
In this way, both the inner light emitting region 22 and the outer light emitting region 23 emit light when all the lights are on.

Subsequently, when only the outer light emitting region 23 is desired to emit light, the resistance value of the second variable resistor 54 is set to zero.
The current flow at this time will be described. The current supplied from the external power source reaches the first exposed portion 45 from the first wiring 55 and passes through the first conductive film 42 from the first exposed portion 45 as shown in FIG. Thus, the lead electrode 15 in the outer power feeding region 27 is reached. The current reaching the extraction electrode 15 in the outer power feeding region 27 reaches the outer light emitting region 23 via the first electrode layer 3, and the first electrode layer 3 passes through the functional layer 5 in the outer light emitting region 23. It is transmitted to the two-electrode layer 6. At this time, the functional layer 5 in the organic EL element 10b emits light, and the entire outer light emitting region 23 emits light.
The current reaching the second electrode layer 6 in the outer light emitting region 23 reaches the intermediate power supply region 26 via the second electrode layer 6, and is transmitted to the third wiring 57 via the extraction electrode 14 in the intermediate power supply region 26. Then, the current reaching the third wiring 57 reaches the second branch wiring 60. The second branch wiring 60 passes through the second variable resistor 54, is transmitted to the second wiring 56, and returns to the external power source.

On the other hand, when only the inner light emitting region 22 is desired to emit light, the resistance value of the first variable resistor 53 is set to zero.
The current flow at this time will be described. The current supplied from the external power source passes through the first variable resistor 53 of the first branch wiring 59 from the first wiring 55 to the third wiring 57 as shown in FIG. To the second exposed portion 46. The current transmitted to the second exposed portion 46 is transmitted to the second electrode layer 6 and the first electrode layer 3 in the intermediate feeding region 26 via the extraction electrode 14 and reaches the first electrode layer 3 in the inner light emitting region 22. . The light is transmitted from the first electrode layer 3 to the second electrode layer 6 via the functional layer 5 in the inner light emitting region 22. At this time, the functional layer 5 in the organic EL element 10b emits light, and the entire inner light emitting region 22 emits light.
Then, the current transmitted to the second electrode layer 6 in the inner light emitting region 22 is transmitted to the inner power feeding region 25 through the second electrode layer 6, and is transmitted to the second wiring 56 through the extraction electrode 13, and Return to the external power supply via the second wiring 56.
As described above, according to the organic EL device 1 of the present embodiment, the inner light emitting region 22 and the outer light emitting region 23 can emit light individually.

Further, the organic EL device 1 of the present embodiment also has a light control function.
Specifically, when dimming, the resistance values of the first variable resistor 53 and the second variable resistor 54 are changed. For example, when it is desired to reduce the luminance of the outer light emitting region 23, if the resistance value of the first variable resistor 53 is decreased as shown in FIG. It flows to the first branch wiring 59, passes through the first variable resistor 53, is transmitted to the third wiring 57, and passes through the extraction electrode 14 in the intermediate power supply region 26 to the second electrode layer 6 in the intermediate power supply region 26. It is transmitted. At this time, the current that has passed through the first variable resistor 53 and the current that has passed through the outer light emitting region 23 merge in the second electrode layer 6 in the intermediate power feeding region 26.
Thus, the current supplied to the organic EL device 1 is shunted to the organic EL element 10b side and the first variable resistor 53 side in the outer light emitting region 23, so that the current of the organic EL element 10b in the outer light emitting region 23 is divided. The amount of passage is reduced, and the brightness of the outer light emitting region 23 is lowered.

For example, when it is desired to lower the luminance of the inner light emitting region 22, if the resistance value of the second variable resistor 54 is decreased as shown in FIG. 15, a part of the current that has passed through the outer light emitting region 23 is extracted. Is transmitted to the third wiring 57 through the second branch wiring 60. The current that reaches the second branch wiring 60 passes through the second variable resistor 54 and is transmitted to the second wiring 56. At this time, the current that has passed through the second variable resistor 54 and the current that has passed through the inner light emitting region 22 merge in the second wiring 56.
Thus, the current that has passed through the outer light emitting region 23 is shunted to the organic EL element 10 a side and the second variable resistor 54 side in the inner light emitting region 22, so that the current passing through the organic EL element 10 a in the inner light emitting region 22 is performed. The amount decreases and the brightness of the inner light emitting region 22 decreases.

  As described above, the organic EL device 1 according to the present embodiment has a dimming function in each of the light emitting regions 22 and 23 by adjusting the variable resistors 53 and 54. Therefore, the interior property by installing the lighting is brought out gorgeously, and the atmosphere of the space in which the lighting is installed can be enhanced.

  In the organic EL device 1 of the present embodiment, since the inner light emitting region 22 and the outer light emitting region 23 are annular as described above, each of the inner light emitting region 22 and the outer light emitting region 23 is even in the circumferential direction during lighting. A current flows into the region to emit light, and uneven light emission in the light emitting region 20 can be suppressed. Furthermore, the organic EL device 1 according to the present embodiment has a current density distribution by electrically connecting these light emitting regions 22 and 23 in series, and therefore can emit light uniformly without light emission unevenness.

  The organic EL device 1 according to this embodiment includes heat generated in the light emitting regions 22 and 23 by the first conductive film 42 and the second conductive film 44 having heat equalization or heat dissipation constituting the conductive base material 11. Can be uniformly heated or radiated as a whole, so that uneven light emission hardly occurs.

In the above-described embodiment, the same type of functional layer is used for the functional layer 5 of the inner light emitting region 22 and the functional layer 5 of the outer light emitting region 23. However, the present invention is not limited to this, and Different types of functional layers may be used for the functional layer and the functional layer in the outer light emitting region. For example, functional layers that emit different emission colors may be combined.
Specifically, a light emitting layer that emits a cold emission color is used for the functional layer of the inner light emitting region, and a light emitting layer that emits a warm light emitting color is used for the functional layer of the outer light emitting region. And the light emitted from the outer light emitting region are mixed to obtain a white emission color. More specifically, by using a light emitting layer that emits a blue light emitting color for the functional layer of the inner light emitting region and a light emitting layer that emits an orange light emitting color for the functional layer of the outer light emitting region, the light in the inner light emitting region is obtained. And the light emitted from the outer light emitting region are mixed to obtain a white emission color.
In addition, a toning function can be added by dimming using this organic EL device.
Here, the “cold light emitting layer” is a light emitting layer having an emission peak only at a wavelength of less than 570 nm, and the “warm color light emitting layer” has an emission peak only at a wavelength of 570 nm or more. It is a light emitting layer.
The “blue light-emitting layer” is a light-emitting layer designed to have a blue light-emitting color having a light emission peak only at a wavelength of 400 nm or more and less than 500 nm among cold colors. The “orange light emitting layer” is a light emitting layer designed to have an orange light emitting color having an emission peak only at a wavelength of 570 nm or more and less than 620 nm in the warm color system.

  In the above-described embodiment, the case where a circular glass substrate is used as the substrate 2 has been described. However, the present invention is not limited to this and may be an elliptical shape.

  In the above-described embodiment, a variable resistor is used to control light emission, but the present invention is not limited to this, and a switch may be used. Moreover, you may adjust by PWM control.

1 Organic EL device 2 Substrate (base material)
3 First electrode layer 5 Functional layer (organic light emitting layer)
6 Second electrode layer 7 Inorganic sealing layer (sealing layer)
10, 10a, 10b Organic EL element (laminate)
13 Extraction electrode (second terminal part)
20 light-emitting area 21 non-light-emitting area 22 inner light-emitting area 23 outer light-emitting area 27 outer power feeding area (outer peripheral non-light-emitting area)
42 1st conductive film 45 1st exposure part (1st terminal part)
46 Second exposed part (intermediate terminal part)
53 First variable resistor (variable resistor)
54 Second variable resistor (variable resistor)

Claims (8)

A cross-sectional structure having a laminate in which a first electrode layer, an organic light emitting layer, and a second electrode layer are laminated on a circular or elliptical base material, and when the base material is viewed in plan view, In an organic EL device having a light emitting region that emits light,
The light emitting area has an inner light emitting area located inside and an outer light emitting area located outside,
The outer light emitting region is positioned so as to surround the inner light emitting region,
The organic EL device, wherein the stacked body positioned in the inner light emitting region is electrically connected in series with the stacked body positioned in the outer light emitting region. When the substrate is viewed in plan, it has a non-light emitting area that does not emit light at all lamps,
The organic EL device according to claim 1, wherein the non-light emitting region is interposed between the inner light emitting region and the outer light emitting region.   3. The organic EL device according to claim 1, wherein a light emitting area Si of the inner light emitting region is 0.8 to 1.2 times a light emitting area So of the outer light emitting region. The non-light-emitting region has an outer periphery non-light-emitting region located outside the outer light-emitting region and surrounding the outer periphery of the outer light-emitting region,
A first conductive film electrically connectable to an external power source;
The first conductive film is disposed across the outer light emitting region and the outer peripheral non-light emitting region, and is laminated in the outer light emitting region via the first electrode layer in the outer peripheral non light emitting region. The organic EL device according to claim 1, wherein the organic EL device is electrically connected to a body. In the area inside the outer light emitting area,
5. The organic EL device according to claim 4, further comprising a first terminal portion capable of supplying power to the first conductive film and a second terminal portion capable of supplying power to the laminated body in the inner light emitting region. It has an intermediate terminal part in the area inside the outer light emitting area,
The organic terminal according to claim 5, wherein the intermediate terminal portion is an electrical connection portion between the stacked body in the inner light emitting region and the stacked body in the outer light emitting region, and can be electrically connected to the same potential portion. EL device.   The organic EL device according to claim 6, further comprising a variable resistor between the intermediate terminal portion and at least one terminal selected from the group selected from the first terminal portion and the second terminal portion.   The organic EL device according to any one of claims 1 to 7, wherein a light emission color of the inner light-emitting region and a light emission color of the outer light-emitting region are different for all lamps.

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