JP6153356B2 - Organic EL module - Google Patents

Description

  The present invention relates to an organic EL module. In particular, the present invention relates to an organic EL module in which a top emission type organic EL panel and a bottom emission type organic EL panel are stacked.

  In recent years, organic EL modules 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 module is a combination of organic EL panels. The organic EL panel is obtained by applying a sealing structure and a casing to an organic EL device. In the organic EL device, an organic EL element is laminated on a base material such as a glass substrate, and a power feeding structure for the organic EL element is provided.
In addition, the organic EL element has two or more light-transmitting electrodes facing each other, and a light emitting layer made of an organic compound is laminated between the electrodes. The organic EL device emits light by the energy of recombination of electrically excited electrons and holes.
The organic EL panel is a self-luminous device and can emit light of various wavelengths by appropriately selecting a material of the light emitting layer. Further, since the thickness is extremely thin compared to incandescent lamps and fluorescent lamps, and the light is emitted in a planar shape, there are few restrictions on the installation location.

An organic EL panel used as a lighting device is generally configured to emit light on one main surface (one surface) side by stacking organic EL elements on a single substrate. That is, the main surface has a light emitting surface, and the light emitting surface is directed to a space such as a living space, so that the space is illuminated.
In addition, since the organic EL panel is surface emitting, the amount of light radiated into the space is small compared to LED lighting that collects light at a single point, and how to increase the amount of light is an issue. ing. Therefore, as a measure for increasing the amount of light of the organic EL panel, the technique of Patent Document 1 is disclosed.
That is, in the lighting device (organic EL panel) described in Patent Document 1, the light quantity of the entire lighting device is improved by changing the stack structure of the conventional organic EL elements and improving the light extraction efficiency and luminance in the organic EL elements. Is increasing.

JP 2010-192472 A

  However, since the illumination device described in Patent Document 1 improves the amount of light by changing the layer structure of the conventional organic EL element, the existing organic EL panel cannot be used and is versatile. There is a problem that it is low.

Further, in the lighting device described in Patent Document 1, when the light emitting area is increased, luminance unevenness may occur due to electrical resistance between the anode and the cathode.
When this problem is described in detail, the value of the current flowing through the light emitting layer differs between a position away from a portion fed from an external terminal (hereinafter also referred to as a power feeding unit) and a position close to the light emitting surface of the organic EL panel. . That is, current does not easily flow at a position away from the power feeding unit, and current tends to concentrate at a position near the power feeding unit. Therefore, the luminance is low at a position away from the power supply unit, and the luminance is high at a position near the power supply unit.
As described above, although the illumination device described in Patent Document 1 can improve the amount of light, luminance unevenness may occur when the light emission area increases.

  Therefore, an object of the present invention is to provide an organic EL module having a simple configuration and a large amount of light compared to the conventional one.

According to a first aspect of the present invention for solving the above-described problem, a first laminate including a first electrode layer, a first organic light emitting layer, and a second electrode layer on one main surface of a first substrate. Organic EL module comprising: a first organic EL panel having a body; and a second organic EL panel having a second stacked body in which a second organic light emitting layer and a third electrode layer are stacked on one main surface of a metal electrode substrate The first organic EL panel is a bottom emission organic EL panel that extracts light from the first substrate side, and all of the first substrate, the first electrode layer, and the second electrode layer have translucency. The second organic EL panel is a top emission organic EL panel that extracts light from the third electrode layer side, and at least the third electrode layer has translucency, and the metal electrode substrate The metal plate, the laminated structure of the metal plate and the metal electrode layer, and the insulation The first organic EL panel and the second organic EL panel are formed by any one of a laminated structure of a substrate and a metal electrode layer, and the main surface of the first substrate and the main surface of the metal electrode substrate are opposed to each other, and The first light emitting region that emits light when the first organic EL panel is driven and the second light emitting region that emits light when the second organic EL panel is driven are overlapped and integrated so as to substantially coincide with the stacking direction. The light emitted from the EL panel and the light emitted from the second organic EL panel can be irradiated in the same direction, and the first organic EL panel and the second organic EL panel are electrically connected in series , and are planar. The external power supply member has a first power supply unit on the front surface and a second power supply unit on the back surface, and the first power supply unit and the second power supply unit. Part of the first electrode layer and the metal electrode substrate The first power feeding unit is electrically connected to the first stacked body in the first light emitting region via the first electrode layer, and the second power feeding unit is An organic EL module that is electrically connected to a second stacked body in a second light emitting region via a metal electrode substrate .
That is, according to the present invention, a first organic EL panel having a first laminate including a first electrode layer, a first organic light emitting layer, and a second electrode layer on one main surface of a first substrate, a metal In the organic EL module including the second organic EL panel having the second stacked body in which the second organic light emitting layer and the third electrode layer are stacked on one main surface of the electrode substrate, the first organic EL panel includes: A bottom emission type organic EL panel that extracts light from one substrate side, and all of the first substrate, the first electrode layer, and the second electrode layer have translucency, and the second organic EL panel is A top emission type organic EL panel for extracting light from the third electrode layer side, wherein at least the third electrode layer has translucency, and the metal electrode substrate comprises a metal plate, a metal plate and a metal electrode layer And a laminated structure of an insulating substrate and a metal electrode layer In the first organic EL panel and the second organic EL panel, the main surface of the first substrate faces the main surface of the metal electrode substrate, and the first organic EL panel is driven. The first light emitting region that emits light and the second light emitting region that emits light when driving the second organic EL panel are integrated so as to substantially coincide with the stacking direction, and the light emitted from the first organic EL panel and the second light emitting region are integrated. Light emitted from the organic EL panel can be irradiated in the same direction, and the first organic EL panel and the second organic EL panel are electrically connected in series.

Here, “the first light emitting region of the first organic EL panel and the second light emitting region of the second organic EL panel substantially coincide with each other in the stacking direction” means that the first light emitting region and the second organic light emitting region This represents a state in which the area of the overlapping portion of the second light emitting region of the EL panel occupies 95% or more of the area of the first light emitting region of the first organic EL panel or the area of the second light emitting region of the second organic EL panel.
The “metal plate” here is not a thin film but a metal plate-like member that does not deform in a natural environment. That is, it has a predetermined rigidity and an average thickness of at least 100 μm.
Here, the “metal electrode layer” is a thin film having a smaller thickness than the metal plate. That is, it has an average thickness of at least less than 100 μm, and a metal film formed by vapor deposition metal film, electroplating or electroless plating can be preferably employed.
The “insulating substrate” is not a thin film but a plate-like member having an insulating property and is not deformed in a natural environment.
Here, “translucency” refers to a property of transmitting 80% or more of light. That is, it includes transparency.

According to the configuration of the present invention, the metal electrode substrate is formed of any one of a metal plate, a laminated structure of the metal plate and the metal electrode layer, and a laminated structure of the insulating substrate and the metal electrode layer. That is, when the metal electrode substrate is formed of a metal substrate, the metal plate functions as an electrode. When the metal electrode substrate is formed of a metal plate and a metal electrode layer, the metal electrode layer is used as an electrode. When the metal electrode substrate is formed of an insulating substrate and a metal electrode layer, the metal electrode layer functions as an electrode.
According to the configuration of the present invention, in the first organic EL panel, since the first substrate and the first electrode layer have translucency, the light generated in the first organic light emitting layer during driving is at least the first. It penetrates the substrate.
According to the configuration of the present invention, since the third electrode layer of the second organic EL panel has translucency, the light generated in the second organic light emitting layer during driving is at least the third electrode layer. Transparent.
Further, according to the configuration of the present invention, in the first organic EL panel and the second organic EL panel, the main surface of the first substrate and the main surface of the metal electrode substrate face each other. That is, the first stacked body and the second stacked body are located between the first substrate and the metal electrode substrate.
According to the configuration of the present invention, the first light emitting region that emits light when the first organic EL panel is driven and the second light emitting region that emits light when the second organic EL panel is driven are overlapped so as to substantially coincide with the stacking direction. It is integrated.
With the above configuration, the light emitted from the second organic EL panel is transmitted through the first substrate, the first electrode layer, and the second electrode layer of the first organic EL panel having translucency, so that the first organic EL panel Can be irradiated in the same direction as the light emitted from. Therefore, the amount of light emitted from the third electrode layer side of the second organic EL panel is the light emitted from the first organic EL panel at the overlapping portion of the light emitting region of the first organic EL panel and the light emitting region of the second organic EL panel. Are amplified by overlapping. Therefore, the amount of light per unit area of the entire organic EL module can be increased.
By the way, when the organic EL module is used for the lighting device, unlike the case where the organic EL module is used for the display, there are few applications in which the amount of light is partially controlled or strictly controlled by a plurality of systems when adjusting the light amount. That is, even when the dimming function is used, since each element is rarely controlled independently, it is preferable that the entire organic EL module can be controlled with as few systems as possible without forming a complicated wiring structure.
Therefore, according to the configuration of the present invention, since the first organic EL panel and the second organic EL panel are electrically connected in series, the first organic EL panel and the second organic EL panel are simultaneously connected to one system. Dimming is possible with constant current drive. That is, the wiring structure is not complicated, and the organic EL module has a simple wiring structure.

Although the foregoing invention, the first organic EL panel and the second organic EL panel has a connecting member for electrically connecting, the connecting member has been arranged on the side surface of the first organic EL panel and the second organic EL panel May be.

According to the configuration of the present invention, the first organic EL panel and the second organic EL panel are electrically connected in series via the connecting members disposed on the side surfaces located outside the respective light emitting regions. The first organic EL panel and the second organic EL panel are electrically connected without blocking light emitted from the first stacked body belonging to the first light emitting region and the second stacked body belonging to the second light emitting region by the connecting member. be able to.

  By the way, the organic EL module of the above-described invention has the first laminated body and the second laminated body located between the first substrate of the first organic EL panel and the metal electrode substrate of the second organic EL panel. There is a problem that it is difficult to supply power from the external power source to the first laminated body and the second laminated body because the power feeding part to the body and the second laminated body is located inside the first substrate and the metal electrode substrate.

Accordingly, the invention described in claim 1 includes an external power supply member having a planar shape, and the external power supply member is provided with a first power supply portion on the front surface and a second power supply portion on the back surface. A part of the first power supply unit and the second power supply unit are interposed between the first electrode layer and the metal electrode substrate, and the first power supply unit passes through the first electrode layer. The second light emitting unit is electrically connected to the second stacked body in the second light emitting region via the metal electrode substrate, and is electrically connected to the first stacked body in the first light emitting region. Tei Ru.

  According to the configuration of the present invention, the external power supply member includes the first power supply unit on the front surface and the second power supply unit on the back surface, and the first power supply unit and the second power supply unit include the first power supply unit and the second power supply unit. It extends in and out (plane direction) of the space between the electrode layer and the metal electrode substrate. That is, the external power supply member faces the direction (opposite direction) in which the first power supply unit and the second power supply unit are separated from each other outside the space between the first electrode layer and the metal electrode substrate. Easy to connect terminals. On the other hand, since it is sandwiched between the first electrode layer and the metal electrode substrate inside the space between the first electrode layer and the metal electrode substrate, it is difficult to pick up noise or the like from the outside. Therefore, power can be easily and stably supplied.

Invention of Claim 2 has a connection member which electrically connects a 1st organic EL panel and a 2nd organic EL panel, The said connection member is a side surface of a 1st organic EL panel and a 2nd organic EL panel The first organic EL panel has a first auxiliary electrode layer having a conductivity higher than that of the second electrode layer, and the first auxiliary electrode layer is in contact with the second electrode layer. The organic EL module according to claim 1, wherein the organic EL module extends from a side surface of the first organic EL panel toward a side surface facing the first organic EL panel.

  According to the configuration of the present invention, in the first organic EL panel, the first auxiliary electrode layer is in contact with the second electrode layer and extends from the side surface side of the first organic EL panel toward the opposite side surface side. ing. Therefore, even if the second electrode layer is formed of a material having low conductivity, the first auxiliary electrode layer can assist the electric conduction in the second electrode layer. Low power loss is small, and high luminance and luminance unevenness can be reduced. In addition, since the first auxiliary electrode layer is provided so as to connect the side surface where the connection member is located and the side surface facing the side surface, the current easily flows from the first light emitting region side to the connection member, or the connection It tends to flow from the member to the first light emitting region side.

The above-described invention has a connection member that electrically connects the first organic EL panel and the second organic EL panel, and the connection member is disposed on the side surfaces of the first organic EL panel and the second organic EL panel. The second organic EL panel has a second auxiliary electrode layer having a conductivity higher than that of the third electrode layer, the second auxiliary electrode layer being in contact with the third electrode layer; 2 It may extend from the side surface side of the organic EL panel toward the opposite side surface side .

According to the configuration of this, in the second organic EL panel, the second auxiliary electrode layer, in contact with the third electrode layer, and extends toward the side surface side opposite from the side of the second organic EL panel. Therefore, even if the third electrode layer is formed of a material having low conductivity, the second auxiliary electrode layer can assist the electric conduction in the third electrode layer. Low power loss is small, and high luminance and luminance unevenness can be reduced.

Invention described above, the first organic EL panel and the second organic EL panel is bonded by a transparent resin, refractive index of the transparent resin may be I der 1.3 to 1.5 .

According to the configuration of this, the first organic EL panel and the second organic EL panel, the refractive index is adhered by 1.3 to 1.5 of the transparent resin, the light is easily transmitted. Therefore, the luminance of the entire organic EL module can be improved without substantially reducing the light extraction efficiency from the second organic EL panel.

According to a third aspect of the present invention, the second organic EL panel includes a metal oxide layer having a hole injection property, and the metal oxide layer includes the second organic light emitting layer and the third electrode layer. be between, in direct contact with the third electrode layer, the average thickness of the metal oxide layer is an organic EL module according to claim 1 or 2, characterized in that at 1nm or more 100nm or less .

  According to the configuration of the present invention, in the second organic EL panel, a metal oxide layer having a hole injection property is located between the second organic light emitting layer and the third electrode layer, and the metal oxide layer is , In direct contact with the third electrode layer. Therefore, for example, when the third electrode layer is formed by a CVD method or the like, damage applied to the first organic light emitting layer can be protected by the metal oxide layer. In addition, since the metal oxide layer has a hole injecting property, it is possible to easily extract holes from the third electrode layer during driving, so that the light emission efficiency of the second organic EL panel is increased. The brightness of the entire organic EL module is improved.

The organic EL module according to claim 3 , wherein the metal oxide layer preferably contains molybdenum oxide (claim 4 ).

Invention described above, the second electrode layer is a metal thin film layer, the average layer thickness of the second electrode layer may be I der than 50nm or less 3 nm.

According to the configuration of this, the second electrode layer, since the average layer thickness of less metal thin layer 50nm or 3 nm, while ensuring the transmission of light from the second organic EL panel, the first organic EL panel The light emission characteristics can be maintained, and the light emission efficiency is also improved.

By the way, in the present invention, since both the first organic EL panel and the second organic EL panel have a structure for extracting light from the first substrate side, the first organic EL panel is an ordinary bottom emission type organic EL. Unlike the panel, it is necessary to use a light-transmitting electrode (for example, a transparent conductive oxide or a metal thin film layer) for the non-light extraction side electrode (second electrode layer). However, for example, when a transparent conductive oxide is used as an electrode on the non-light-extraction side, the internal resistance is larger than that of a metal. Therefore, by contacting a thin-line finger electrode as an auxiliary electrode layer, light extraction is performed. There is a case where a structure for assisting electrical conduction of the side electrode is employed. In addition, for example, when a metal thin film layer is used as an electrode on the light non-extraction side, it is extremely thin, so that electric conduction is not sufficient, and by contacting a thin wire finger electrode as an auxiliary electrode layer, the light extraction side In some cases, a structure for assisting the electrical conduction of the electrodes is used. That is, in either case, finger electrodes are formed.
This finger electrode is usually formed by vacuum deposition or the like by covering the surface of the electrode on the light extraction side with a mask or the like. This finger electrode is preferably formed from the end of the electrode on the non-light-extraction side from the viewpoint of suppressing luminance unevenness. However, since it is formed by covering with a mask, the finger electrode is several mm between the ends of each finger electrode. A degree of disturbance will occur. Therefore, in some cases, the finger electrode may contact the electrode on the light extraction side beyond the end of the electrode on the non-light extraction side, and may be short-circuited during driving.

Accordingly, in the invention described in claim 5 , the first organic EL panel has a first auxiliary electrode layer having a conductivity higher than that of the second electrode layer, and the first auxiliary electrode layer is formed of a wire. The first finger electrode has a conductivity higher than that of the second electrode layer and is in direct contact with the second electrode layer. finger electrodes is located outside the first emission region, and, when the first substrate in plan Te superimposed portions smell of the first electrode layer and the second electrode layer and the second electrode layer and the first finger electrode extending an organic EL module according to any one of claims 1 to 4, characterized in that it is separated in the direction.
That is, according to the present invention, the first auxiliary electrode layer has a linearly extending first finger electrode, and the first finger electrode has higher conductivity than the second electrode layer, and The first finger electrode is outside the first light emitting region and when the first substrate is viewed in plan, the first electrode layer and the second electrode layer are in direct contact with the second electrode layer. This is related to the fact that the second electrode layer and the first finger electrode are separated in the extending direction by laser scribing at the overlapping portion.

According to the configuration of the present invention, since the first electrode layer and the second electrode layer are separated in the extending direction by laser scribing when the first substrate is viewed in plan, the first finger electrode is separated from the second electrode. Can extend to the end of the layer. Further, the second electrode layer and the first finger electrode are separated in the extending direction by laser scribing. Therefore, the separated part (side different from the first light emitting region side) does not contribute electrically, so even if the end of the first finger electrode and the first electrode layer are in contact with each other, a short circuit does not occur, and the reliability High nature.
In addition, in this specification, various grooves formed by laser scribing have a groove width that is too large for irradiating power to damage the substrate (including the substrate) or the like, or a laser light source for high output. In addition, the power to irradiate is too small, the tact time is prolonged, the separation and embedding are insufficient, and the reliability of electrical insulation and sealing insulation can be secured. In order to avoid disappearance, it is preferably 1 μm to 200 μm, more preferably 5 μm to 100 μm, further preferably 10 μm to 80 μm, and particularly preferably 25 μm to 60 μm. preferable.

According to a sixth aspect of the present invention, the first organic EL panel includes a first auxiliary electrode layer having a conductivity higher than that of the second electrode layer, and the first electrode layer includes a first light emitting region. The first auxiliary electrode layer has a plurality of first finger electrodes, and the first finger electrodes have a conductivity higher than that of the second electrode layer. be one, and in direct contact with the second electrode layer, one end of the first finger electrode is 1 to claim, characterized in that it is physically connected to the electrode terminal tracks 5. The organic EL module according to any one of 5 above.

  According to the configuration of the present invention, since the plurality of first finger electrodes that assist the second electrode layer at the time of driving are fixed by the electrode connection band, power can be supplied more reliably.

  According to the organic EL module of the present invention, the total light amount can be increased with a simple configuration in which a bottom emission type first organic EL panel and a top emission type second organic EL panel are stacked.

1 is a perspective view conceptually showing an organic EL module according to a first embodiment of the present invention. It is AA sectional drawing of the organic EL module of FIG. It is BB sectional drawing of the organic EL module of FIG. It is a disassembled perspective view of the organic EL module of FIG. It is a perspective view which shows the state which expand | deployed the 1st organic EL panel and 2nd organic EL panel of FIG. It is the disassembled perspective view which decomposed | disassembled the 1st organic EL panel of the state of FIG. It is the disassembled perspective view which decomposed | disassembled the 2nd organic EL panel of the state of FIG. It is explanatory drawing of each area | region of the 1st organic EL panel of FIG. 4, and the 2nd organic EL panel, (a) is the top view which looked at the 1st organic EL panel from the transparent insulation board | substrate side, (b) is 2nd It is the top view which looked at the organic EL panel from the 3rd inorganic sealing layer side. It is explanatory drawing showing the positional relationship of each area | region of the 1st organic EL panel of FIG. 4, and a 2nd organic EL panel. It is explanatory drawing showing the manufacturing process of the 1st organic EL panel of FIG. 1, (a) is a top view after forming the electrode connection band formation groove | channel, (b) is AA sectional drawing of (a). It is. It is explanatory drawing showing the manufacturing process of the 1st organic EL panel of FIG. 1, (a) is a top view after forming the 1st functional layer, (b) is AA sectional drawing of (a). is there. It is explanatory drawing showing the manufacturing process of the 1st organic EL panel of FIG. 1, (a) is a top view after forming the 2nd electrode layer, (b) is AA sectional drawing of (a). is there. It is explanatory drawing showing the manufacturing process of the 1st organic EL panel of FIG. 1, (a) is a top view after forming the 1st auxiliary electrode layer, (b) is AA sectional drawing of (a). It is. It is explanatory drawing showing the manufacturing process of the 1st organic EL panel of FIG. 1, (a) is a top view after forming the short circuit prevention groove | channel, (b) is AA sectional drawing of (a). . It is explanatory drawing showing the manufacturing process of the 1st organic EL panel of FIG. 1, (a) is a top view after forming the 1st inorganic sealing layer, (b) is the AA cross section of (a). FIG. It is explanatory drawing showing the manufacturing process of the 2nd organic EL panel of FIG. 1, (a) is a top view after forming the 2nd organic EL element, (b) is AA sectional drawing of (a). It is. It is explanatory drawing showing the manufacturing process of the 2nd organic EL panel of FIG. 1, (a) is a top view after forming the 2nd inorganic sealing layer, (b) is AA cross section of (a). FIG. It is explanatory drawing showing the manufacturing process of the 2nd organic EL panel of FIG. 1, (a) is a top view after forming the 2nd auxiliary electrode layer, (b) is AA sectional drawing of (a). It is. It is explanatory drawing showing the manufacturing process of the 2nd organic EL panel of FIG. 1, (a) is a top view after forming the 3rd inorganic sealing layer, (b) is the AA cross section of (a). FIG. It is a perspective view showing the 2nd organic electroluminescent panel of the state of FIG. It is explanatory drawing showing the panel connection process which connects the 1st organic EL panel and 2nd organic EL panel of FIG. 1, and is a perspective view showing the state before attaching a 1st organic EL panel. It is a conceptual diagram showing the flow of the electric current in an organic EL module at the time of connecting an external power supply to the organic EL module of FIG. It is explanatory drawing showing the flow of the light of each organic EL panel of the organic EL module of FIG. 1, (a) is a figure showing the optical path of the light emitted from a 1st organic EL panel, (b) is 2nd organic. It is a figure showing the optical path of the light emitted from an EL panel. It is explanatory drawing of the process of forming the short circuit prevention groove | channel of this embodiment. It is the perspective view which showed notionally the organic EL module of other embodiment.

  The present invention mainly relates to an organic EL module used in a lighting device. FIG. 1 shows an organic EL module 1 according to the first embodiment of the present invention. Hereinafter, the positional relationship between the top, bottom, left, and right will be described based on the posture of FIG. 1 unless otherwise specified. That is, the light extraction side when the organic EL module 1 is turned on is on. In addition, the drawings are drawn extremely as a whole as compared with actual sizes (length, width, thickness) for easy understanding.

2 and 3, the organic EL module 1 of the present embodiment is formed by laminating the first organic EL panel 2 and the second organic EL panel 3 with a transparent adhesive resin 4 so as to integrate light from the same direction. It is something to take out. Further, the first organic EL panel 2 and the second organic EL panel 3 are electrically connected via a connection member 5 as shown in FIG.
In addition, the first organic EL panel 2 and the second organic EL panel 3 can be fed from an external power source by an external feeding member 6.

The first organic EL panel 2 is a bottom emission type organic EL panel that extracts light from the transparent insulating substrate 12 (first substrate) side.
As shown in FIG. 6, the first organic EL panel 2 has a first electrode layer 13, a first functional layer 15 (first organic light emitting layer), and a second electrode layer 16 on the surface (main surface) of the transparent insulating substrate 12. Are stacked in this order in the first organic EL element 20.
Further, the first organic EL panel 2 is provided with a first auxiliary electrode layer 17 on the second electrode layer 16, and the first organic EL element 20 is mostly covered by the first inorganic sealing layer 18 from above. It is sealed.

The first auxiliary electrode layer 17 is a layer that functions as an auxiliary electrode that assists the electric conduction of the second electrode layer 16, and is a layer that electrically connects the connection member 5 and the second electrode layer 16. The first auxiliary electrode layer 17 is formed of a plurality of first finger electrodes 22 that are in direct contact with the second electrode layer 16 and extend from the connecting member 5 side toward the opposing external power supply member 6 side.
The detailed configuration of each layer of the first organic EL panel 2 will be described later.

  The first organic EL panel 2 includes a first light emitting region 25 that emits light when driven (lighted) and a first light that does not emit light when the transparent insulating substrate 12 is viewed in plan as shown in FIGS. A non-light emitting area 26 is provided.

The first light emitting region 25 is a region where the overlapping portion of the first electrode layer 13, the first functional layer 15, and the second electrode layer 16 is located as shown in FIGS.
The first non-light emitting region 26 is a frame-like region formed so as to surround the first light emitting region 25 as shown in FIG. 8A, and the first non-light emitting region 26 in the first light emitting region 25 as shown in FIG. The first power supply region 27 is electrically connected to the first electrode layer 13, and the second power supply region 28 is electrically connected to the second electrode layer 16 in the first light emitting region 25.
The first power supply region 27 and the second power supply region 28 are provided at positions facing each other across the first light emitting region 25 in the lateral direction s (width direction) as shown in FIG.

  Further, the first organic EL panel 2 includes an electrode connection band forming groove 55 in which the first electrode layer 13 is partially removed as shown in FIG. 2, the first functional layer 15, the second electrode layer 16, and the first auxiliary electrode. A short-circuit prevention groove 56 in which three layers of the layer 17 are partially removed is provided.

  The electrode connection band forming groove 55 is a groove extending in the longitudinal direction l (length direction) as shown in FIGS. 2 and 6, and located at the boundary between the first light emitting region 25 and the second power feeding region 28. It is. That is, the electrode connection band forming groove 55 is a groove that physically separates the first electrode layer 13 belonging to the first light emitting region 25 and the first electrode layer 13 belonging to the second power feeding region 28 as shown in FIGS. Thus, it is a groove for forming a strip-shaped electrode connection band 14.

  The short-circuit prevention groove 56 is a groove extending in the longitudinal direction l as shown in FIGS. 2 and 6 and located at a boundary portion between the first power feeding region 27 and the first light emitting region 25. The short-circuit prevention groove 56 is a groove that prevents the first electrode layer 13 and the first auxiliary electrode layer 17 from contacting each other as shown in FIGS.

  Here, the positional relationship of each layer in the first organic EL panel 2 will be described. The first electrode layer 13 laminated on the transparent insulating substrate 12 is divided into two regions by the electrode connection band forming groove 55 as described above. The electrode connection band 14 is separated and located in the second power feeding region 28.

  As shown in FIG. 10, the first electrode layer 13 laminated on the transparent insulating substrate 12 covers the entire surface of the transparent insulating substrate 12 except for the electrode connection band forming groove 55. That is, the end portions of the first electrode layer 13 in the vertical direction 1 and the horizontal direction s reach each end portion of the transparent insulating substrate 12.

As shown in FIG. 2, the first functional layer 15 stacked on the first electrode layer 13 extends from the first light emitting region 25 to the regions on both sides of the first feeding region 27 and the second feeding region 28 in the lateral direction. Is formed.
One end of the first functional layer 15 (end on the second power feeding region 28 side) extends to a part of the electrode connection band 14 beyond the electrode connection band forming groove 55 as shown in FIG. That is, the first functional layer 15 is filled in the electrode connection band forming groove 55 and is in direct contact with the first electrode layer 13 through the electrode connection band forming groove 55. Therefore, the first electrode layer 13 in the first light emitting region 25 and the first electrode layer 13 (electrode connection band 14) in the second power feeding region 28 are bordered by the first functional layer 15.
On the other hand, the other end of the first functional layer 15 (the end on the first power feeding region 27 side) does not reach the end of the first electrode layer 13 as shown in FIG. The first functional layer 15 is accommodated.
In the vertical direction, as shown in FIG. 3, both end portions of the first functional layer 15 do not reach the end portion of the first electrode layer 13, and the first functional layer 15 is accommodated on the first electrode layer 13.

As shown in FIG. 2, the second electrode layer 16 laminated on the first functional layer 15 extends in the lateral direction from the first light emitting region 25 to the regions on both sides of the first feeding region 27 and the second feeding region 28. Is formed.
In the lateral direction, one end of the second electrode layer 16 (the end on the second power feeding region 28 side) covers the outside beyond the end of the first functional layer 15 as shown in FIG. 2 It is in contact with a part of the first electrode layer 13 (electrode connection band 14) in the power feeding region 28. That is, the second electrode layer 16 and the electrode connection band 14 are physically connected.
On the other hand, the other end of the second electrode layer 16 (the end on the first power feeding region 27 side) reaches the end of the first functional layer 15 as shown in FIG. The second electrode layer 16 is accommodated on the functional layer 15.
In the vertical direction, both ends of the second electrode layer 16 do not reach the end of the first functional layer 15 as shown in FIG. 3, and the second electrode layer 16 is accommodated on the first functional layer 15.

The first finger electrodes 22 of the first auxiliary electrode layer 17 laminated on the second electrode layer 16 are evenly distributed over the entire surface (surface on the light non-extraction surface side, back surface side) of the second electrode layer 16 as shown in FIG. It is distributed and formed.
As shown in FIG. 2, each first finger electrode 22 of the first auxiliary electrode layer 17 extends from the first light emitting region 25 to the regions on both sides of the first feeding region 27 and the second feeding region 28 in the lateral direction. Is formed.
In the lateral direction, one end (the second power feeding region 28 side) of each first finger electrode 22 protrudes beyond the end of the second electrode layer 16 as shown in FIG. It also extends. Then, one end (the second power feeding region 28 side) of each first finger electrode 22 reaches the vicinity of the end of the electrode connection band 14. That is, each first finger electrode 22 is. As shown in FIG. 6, the second electrode layer 16 is provided over the entire lateral direction s, and each first finger electrode 22 and the electrode connection band 14 are physically connected as shown in FIG.
On the other hand, the other end portion of each first finger electrode 22 (the end portion on the first power feeding region 27 side) has its end surface reaching the end portion of the second electrode layer 16 as shown in FIG. First, each first finger electrode 22 is accommodated on the second electrode layer 16.

In the vertical direction, the first finger electrodes 22 are arranged at equal intervals as shown in FIG.
The distance L1 between the first finger electrodes 22 adjacent to the longitudinal direction l is preferably 0.5 mm or more and 10 mm or less, and more preferably 1 mm or more and 5 mm or less.
When the distance between the adjacent first finger electrodes 22 and 22 is less than 0.5 mm, the first finger electrodes 22 are too dense, and the light generated from the organic EL panels 2 and 3 cannot be extracted sufficiently, and the light extraction efficiency is increased. There is a risk that the current will be significantly reduced. If the thickness is larger than 10 mm, current may not be allowed to flow evenly over the entire second electrode layer 16, and uneven brightness may occur in the first organic EL panel 2.

The first inorganic sealing layer 18 laminated on the first auxiliary electrode layer 17 is laterally extended from the first light emitting region 25 to regions on both sides of the first feeding region 27 and the second feeding region 28 as shown in FIG. It is formed straddling. That is, the first inorganic sealing layer 18 covers at least the organic EL element 20 in the first light emitting region 25.
In the lateral direction, one end of the first inorganic sealing layer 18 (the end on the second power feeding region 28 side) exceeds the projection surface in the member thickness direction of the electrode connection band forming groove 55 as shown in FIG. And extends to the outside of the second electrode layer 16. However, the first inorganic sealing layer 18 does not cover the end of the first auxiliary electrode layer 17. When viewed from the first auxiliary electrode layer 17 side, the end portion of the first auxiliary electrode layer 17 forms a second exposed portion 61 exposed from the first inorganic sealing layer 18 on the electrode connection band 14.
On the other hand, the other end portion (the end portion on the first power feeding region 27 side) of the first inorganic sealing layer 18 exceeds the short-circuit prevention groove 56 as shown in FIG. 2, and further the first functional layer 15 and the second electrode layer. 16, and reaches the outside of the end portion of the first auxiliary electrode layer 17. That is, the first inorganic sealing layer 18 is filled in the short-circuit prevention groove 56 and is in direct contact with the first electrode layer 13 through the short-circuit prevention groove 56.
The first inorganic sealing layer 18 covers the end surfaces of the first functional layer 15, the second electrode layer 16, and the first auxiliary electrode layer 17, and directly contacts the first electrode layer 13 outside these. ing. However, the first inorganic sealing layer 18 does not reach the end of the first electrode layer 13. When viewed from the first electrode layer 13 side, the first exposed portion 60 exposed from the first inorganic sealing layer 18 is formed.

In the vertical direction, the first inorganic sealing layer 18 covers at least the organic EL element 20 in the first light emitting region 25 and further covers both outer sides of the first functional layer 15 as shown in FIG. The end of the first electrode layer 13 is not reached, and the first inorganic sealing layer 18 is accommodated on the first electrode layer 13.
Thus, the first inorganic sealing layer 18 completely covers the first organic EL element 20 in the first light emitting region.

Next, the second organic EL panel 3 will be described.
The second organic EL panel 3 is a top emission type organic EL panel that extracts light from the third electrode layer 36 side.
The second organic EL panel 3 includes a second organic EL element 40 in which a second functional layer 35 and a third electrode layer 36 are laminated in this order on the surface (main surface) of the metal electrode substrate 32 as shown in FIG. ing. Most of the second organic EL element 40 is sealed by the second inorganic sealing layer 38 and the third inorganic sealing layer 39.

In the second organic EL panel 3, a second auxiliary electrode layer 37 is laminated on the second inorganic sealing layer 38 and the third electrode layer 36 as shown in FIGS.
The second auxiliary electrode layer 37 is a layer that functions as an auxiliary electrode that assists the electrical conduction of the third electrode layer 36, and is a layer that electrically connects the connection member 5 and the third electrode layer 36.
The second auxiliary electrode layer 37 is formed of a plurality of second finger electrodes 49 that are in direct contact with the third electrode layer 36 and extend from the connecting member 5 side toward the opposing external power feeding member 6 side.
The detailed configuration of each layer of the second organic EL panel 3 will be described later.

  As shown in FIGS. 2 and 8B, the second organic EL panel 3 includes a second light emitting region 41 that emits light when driven, like the first organic EL panel 2, when the metal electrode substrate 32 is viewed in plan view. The second non-light emitting region 42 that does not emit light is provided.

The second light emitting region 41 is a region where the overlapping portion of the metal electrode substrate 32, the second functional layer 35, and the third electrode layer 36 is located as shown in FIG.
The second non-light emitting region 42 is a frame-like region formed so as to surround the second light emitting region 41 as shown in FIG. 8B, and the metal in the second light emitting region 41 as shown in FIG. A third power feeding region 43 electrically connected to the electrode substrate 32 and a fourth power feeding region 44 electrically connected to the third electrode layer 36 in the second light emitting region 41 are provided.
The third power supply region 43 and the fourth power supply region 44 are provided at positions facing each other across the second light emitting region 41 as shown in FIG.

Here, the positional relationship between the respective layers in the second organic EL panel 3 will be described. The second functional layer 35 laminated on the metal electrode substrate 32 is separated from the second light emitting region 41 in the lateral direction as shown in FIG. It is formed across the regions on both sides of the third power supply region 43 and the fourth power supply region 44.
Further, as shown in FIG. 3, the second functional layer 35 is formed across the regions on both sides of the second non-light emitting region 42 from the second light emitting region 41 in the vertical direction.
As shown in FIG. 7, all the end portions of the second functional layer 35 in the vertical direction l and the horizontal direction s are accommodated on the metal electrode substrate 32. When viewed from the metal electrode substrate 32 side, respective end portions in the vertical direction 1 and the horizontal direction s of the metal electrode substrate 32 protrude from the second functional layer 35.

The third electrode layer 36 laminated on the second functional layer 35 is laminated at the approximate center of the second functional layer 35 as shown in FIG. 7, and all end portions in the vertical direction l and the horizontal direction s are the first. It is accommodated on the bifunctional layer 35.
As shown in FIG. 2, the third electrode layer 36 is formed to extend from the second light emitting region 41 to regions on both sides of the third feeding region 43 and the fourth feeding region 44 in the lateral direction.
Further, as shown in FIG. 3, the third electrode layer 36 is formed to extend from the second light emitting region 41 to the regions on both sides of the second non-light emitting region 42 in the vertical direction.

The second inorganic sealing layer 38 stacked over the metal electrode substrate 32, the second functional layer 35, and the third electrode layer 36 is formed outside the second light emitting region 41 as shown in FIGS. Has been. That is, the second inorganic sealing layer 38 belongs to the second non-light emitting region 42 but does not belong to the second light emitting region 41.
When viewed from the third electrode layer 36 side, an opening 52 exposed from the second inorganic sealing layer 38 is formed on the third electrode layer 36 as shown in FIG. The opening shape of the opening 52 is the same as or similar to the shape of the second light emitting region 41. Specifically, it has a quadrangular shape.

In the lateral direction, one outer end portion (end portion on the fourth power feeding region 44 side) of the second inorganic sealing layer 38 exceeds the end portion of the second functional layer 35 as shown in FIG. It covers to the end of the.
The other outer end portion (the end portion on the third power feeding region 43 side) of the second inorganic sealing layer 38 exceeds the end portion of the second functional layer 35 and is in front of the end portion of the metal electrode substrate 32 as shown in FIG. It extends to. When viewed from the metal electrode substrate 32 side, a part of the metal electrode substrate 32 protrudes from the second inorganic sealing layer 38 and is exposed to form a third exposed portion 62.
In the longitudinal direction, both end portions of the second inorganic sealing layer 38 do not reach the end portion of the metal electrode substrate 32 as shown in FIG. 3, and a part of the metal electrode substrate 32 is the same as the third exposed portion 62. The second inorganic sealing layer 38 is exposed.

The second finger electrodes 49 of the second auxiliary electrode layer 37 stacked on the third electrode layer 36 are evenly distributed over the entire surface of the exposed portion from the opening 52 of the third electrode layer 36 as shown in FIGS. It is distributed and formed.
Each second finger electrode 49 of the second auxiliary electrode layer 37 extends from the second light emitting region 41 to the regions on both sides of the third feeding region 43 and the fourth feeding region 44 in the lateral direction as shown in FIG. Is formed.
In the lateral direction, one end of the second auxiliary electrode layer 37 (the end on the fourth power feeding region 44 side) is second inorganic sealed from above the third electrode layer 36 in the opening 52 as shown in FIG. It extends over the layer 38 and further extends to the vicinity of the outer end of the second inorganic sealing layer 38.
On the other hand, the other end portion of the second auxiliary electrode layer 37 (the end portion on the third power feeding region 43 side) also has a second inorganic sealing layer 38 from above the third electrode layer 36 in the opening 52 as shown in FIG. It extends over the top and further extends to the vicinity of the outer end of the second inorganic sealing layer 38.
That is, each second finger electrode 49 is provided on the second inorganic sealing layer over substantially the entire lateral direction as shown in FIG. 7, and the third electrode layer 36 and the second inorganic sealing layer 38 are provided. It is provided across. That is, each second finger electrode 49 is in contact with the surface of the third electrode layer 36 via the inside of the opening 52 where the third electrode layer 36 is exposed, and further on the second inorganic sealing layer 38. Direct contact.

In the vertical direction l, as shown in FIGS. 3 and 7, the second finger electrodes 49 are arranged at equal intervals.
The distance L2 (see FIG. 7) between the second finger electrodes 49 adjacent to each other in the longitudinal direction l is preferably 0.5 mm or more and 10 mm or less, and more preferably 1 mm or more and 5 mm or less.
When the distance between the adjacent second finger electrodes 49 and 49 is less than 0.5 mm, the second finger electrodes 49 are too dense, and the light generated from the organic EL panel 3 cannot be sufficiently extracted, and the light extraction efficiency is remarkably high. If it exceeds 10 mm, it may not be possible to allow a current to flow evenly throughout the third electrode layer 36, and uneven brightness may occur in the second organic EL panel 3.

The third inorganic sealing layer 39 laminated on the second auxiliary electrode layer 37 is formed in the lateral direction from the second light emitting region 41 to the regions on both sides of the third feeding region 43 and the fourth feeding region 44 as shown in FIG. It is formed straddling.
In the lateral direction, one end of the third inorganic sealing layer 39 (end on the fourth power feeding region 44 side) does not reach the end of the second auxiliary electrode layer 37 as shown in FIG. A part of the auxiliary electrode layer 37 is exposed. When viewed from the second auxiliary electrode layer 37 side, the second auxiliary electrode layer 37 has a fourth exposed portion 63 exposed from the third inorganic sealing layer 39.
The other end of the third inorganic sealing layer 39 (the end on the third feeding region 43 side) reaches the end of the second inorganic sealing layer 38 and covers the end surface of the second auxiliary electrode layer 37. ing.

In the vertical direction, the third inorganic sealing layer 39 covers at least the second organic EL element 40 in the second light emitting region 41 and reaches the end of the second inorganic sealing layer 38 as shown in FIG. Yes.
As described above, the second inorganic sealing layer 38 and the third inorganic sealing layer 39 completely cover the second organic EL element 40 in the second light emitting region 41.

Next, the connection member 5 will be described.
The connection member 5 is a member that connects the first auxiliary electrode layer 17 of the first organic EL panel 2 and the second auxiliary electrode layer 37 of the second organic EL panel 3 as shown in FIGS. It is a member that covers the side surfaces of the organic EL panel 2 and the second organic EL panel 3 and forms part of the side surface of the organic EL module 1.
The connecting member 5 is a foil-like conductive member having conductivity as shown in FIG. The material of the connection member 5 is not particularly limited as long as it has conductivity, but metal materials such as gold, silver, copper, nickel, chromium, and aluminum are preferable from the viewpoint of low resistivity. .

The transparent adhesive resin 4 is a member that bonds the first inorganic sealing layer 18 of the first organic EL panel 2 and the third inorganic sealing layer 39 of the second organic EL panel 3 as described above, and specifically, The adhesive material has translucency.
The “adhesive” here includes not only a liquid adhesive but also a solid pressure-sensitive adhesive.
The refractive index of the transparent adhesive resin 4 is preferably 1.3 or more and 1.5 or less.
If it is this range, it can suppress that the light irradiated from the 2nd organic EL panel 3 totally reflects in the interface with the transparent adhesive resin 4. FIG.

  The transparent adhesive resin 4 is an adhesive that has flexibility and is plastically deformed or elastically deformed under predetermined conditions, and is obtained by subjecting the surface of a sheet-like member to adhesive processing. In this embodiment, when the transparent adhesive resin 4 receives a compressive stress or the like from the first inorganic sealing layer 18 or the third inorganic sealing layer 39, the transparent adhesive resin 4 can be plastically deformed with almost no resistance to the stress. Yes.

The Shore hardness of the transparent adhesive resin 4 according to JIS K 6253 is such that 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 transparent adhesive resin 4 is larger than A70, the rigidity of the transparent adhesive resin 4 is too large to absorb the swelling and impact sufficiently.
The flexural modulus of the transparent adhesive resin 4 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 transparent adhesive resin 4 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. But, among them, butyl, which is easily available as a film Beam-based resin is more preferable.
The average thickness of the transparent adhesive resin 4 is preferably 2 μm or more and 100 μm or less, and more preferably 5 μm or more and 50 μm or less.
When the average thickness of the transparent adhesive resin 4 is thinner than 2 μm, the swelling and impact of the first inorganic sealing layer 18 and the third inorganic sealing layer 39 cannot be sufficiently absorbed.

The hard adhesive layer 7 is a hard adhesive having higher rigidity than the transparent adhesive resin 4. Specifically, the shore hardness (and the approximate value of the corresponding flexural modulus) of the hard adhesive layer 7 according to JIS K 6253 is preferably Shore A80 or higher, that is, Shore D30 or higher (25 MPa or higher). From the viewpoint of providing a highly 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 (4000 MPa or lower) More preferably.
The hard adhesive layer 7 is formed by solidifying a solution or a gel-like fluid, and has waterproofness and adhesiveness.
As a specific material of the hard adhesive layer 7, a thermosetting resin or an ultraviolet curable resin can be adopted. In addition, in this embodiment, it is a thermosetting resin and employs an epoxy resin among them.

The external power supply member 6 (circuit board) is a member that can be electrically connected to an external power supply and serves as a power supply terminal that supplies power to the first organic EL panel 2 and the second organic EL panel 3 from the outside.
As shown in FIGS. 2 and 4, the external power supply member 6 is a support substrate between two first power supply layers 46 (first power supply portions) and second power supply layers 47 (first power supply portions) having electrical conductivity. 48 is interposed. In other words, the first power supply layer 46 and the second power supply layer 47 are formed on the front and back main surfaces of the support substrate 48, and the first power supply layer 46 and the second power supply layer 47 have a thickness with respect to the support substrate 48. Facing outward.

The first power supply layer 46 and the second power supply layer 47 are foil-like conductive members, and the material of the first power supply layer 46 and the second power supply layer 47 is not particularly limited as long as it has conductivity. For example, copper foil, gold foil, silver foil, platinum foil, aluminum foil, etc. can be employed.
The support substrate 48 is a plate-like or film-like member having insulating properties. The material of the support substrate 48 is not particularly limited as long as it has insulating properties. For example, polyethylene terephthalate (PET) can be used.

  Then, the positional relationship of each site | part of the 1st organic EL panel 2 and the 2nd organic EL panel 3 is demonstrated.

  As described above, the first inorganic sealing layer 18 of the first organic EL panel 2 and the third inorganic sealing layer 39 of the second organic EL panel 3 are bonded together by the transparent adhesive resin 4 and the hard adhesive layer 7. That is, on the basis of the transparent adhesive resin 4, the first organic EL element 20 is laminated inside the transparent insulating substrate 12 as shown in FIGS. 2 and 3, and the second organic EL element is inside the metal electrode substrate 32. 40 are stacked.

  Further, in the surface direction (the bonding surface direction of the first organic EL panel 2 and the second organic EL panel 3), the external power supply member 6 is located outside the hard adhesive layer 7, and the connection member 5 is hard bonded. It is located outside the layer 7 and on the side opposite to the external power supply member 6.

The first exposed portion 60 of the first organic EL panel 2 and the third exposed portion 62 of the second organic EL panel 3 are in corresponding positions with the external power supply member 6 interposed therebetween as shown in FIG. The first exposed portion 60 of the first organic EL panel 2 and the first feeding layer 46 of the external feeding member 6 are connected via the conductive adhesive 8, and the third exposed portion 62 of the second organic EL panel 3. The second power supply layer 47 of the external power supply member 6 is connected via the conductive adhesive 9.
That is, when the support substrate 48 is used as a reference, the first power feeding layer 46 and the second power feeding layer 47 of the external power feeding member 6 face both outer sides, and the first exposed portion 60 and the second organic layer of the first organic EL panel 2 are faced. The third exposed portion 62 of the EL panel 3 faces both inner sides.

  The second exposed portion 61 of the first organic EL panel 2 and the fourth exposed portion 63 of the second organic EL panel 3 are at corresponding positions with the connection member 5 interposed therebetween as shown in FIG. The second exposed portion 61 of the first organic EL panel 2 and the fourth exposed portion 63 of the second organic EL panel 3 are connected via the connection member 5. That is, the connecting member 5 is physically connected from the second exposed portion 61 located on the light extraction surface side to the fourth exposed portion 63 located on the light non-extraction surface side via the outside of the hard adhesive layer 7. Yes.

When the transparent insulating substrate 12 is viewed in plan, the first light emitting region 25 of the first organic EL panel 2 overlaps the second light emitting region 41 of the second organic EL panel 3 as shown in FIGS. Similarly, the first power supply region 27 overlaps with the third power supply region 43, and the second power supply region 28 overlaps with the fourth power supply region 44.
That is, the light extraction site in the first organic EL panel 2 is on the projection plane in the member thickness direction of the light extraction site in the second organic EL panel 3 as shown in FIG.
In the present embodiment, the first light emitting region 25 of the first organic EL panel 2 and the second light emitting region 41 of the second organic EL panel 3 are completely coincident with each other in the member thickness direction.

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

  The first organic EL panel 2 and the second organic EL panel 3 are formed by a separate process. The organic EL module 1 of the present embodiment includes a first organic EL panel forming step for forming the first organic EL panel 2, a second organic EL panel forming step for forming the second organic EL panel 3, and a first organic EL. It is formed by a panel connection process for connecting the panel 2 and the second organic EL panel 3.

First, the first organic EL panel forming step will be described.
The first electrode layer 13 is formed on the transparent insulating substrate 12 by a sputtering apparatus or a CVD apparatus as shown in FIG. Thereafter, the electrode connection band forming groove 55 is formed by a laser scribing device.
At this time, the electrode connection band forming groove 55 is formed parallel to the vertical side of the transparent insulating substrate 12 and is provided over the entire vertical direction l. An electrode connection band 14 is formed on the transparent insulating substrate 12.

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 (hereinafter also including a laminate on the transparent insulating substrate 12) by a vacuum deposition apparatus. Then, the first functional layer 15 is formed as shown in FIG.
At this time, the first functional layer 15 is formed beyond the electrode connection band forming groove 55 in the lateral direction s. In the first electrode layer 13, the electrode connection band 14 and other parts are edged in the plane direction by the first functional layer 15.

Thereafter, the second electrode layer 16 is formed on the substrate by a sputtering apparatus or a vacuum evaporation apparatus as shown in FIG.
At this time, the second electrode layer 16 is physically connected to the electrode connection band 14 beyond the first functional layer 15 in the lateral direction s. The second electrode layer 16 is accommodated on the first functional layer 15 in the vertical direction.

Thereafter, the substrate is covered with a mask at a predetermined portion, and the first auxiliary electrode layer 17 is formed by a vacuum deposition apparatus as shown in FIG.
At this time, each first finger electrode 22 extends in the lateral direction s and is connected to the electrode connection band 14 beyond the second electrode layer 16. The first finger electrodes 22 are arranged in the vertical direction, and are parallel to each other. Each first finger electrode 22 is also parallel to the lateral side of the substrate.

Thereafter, a part of the laminated body on the first electrode layer 13, that is, the three layers of the first functional layer 15, the second electrode layer 16, and the first auxiliary electrode layer 17 is applied to the substrate by a laser scribing device. The short-circuit preventing groove 56 is formed as shown in FIG.
At this time, the short-circuit prevention groove 56 is formed so as to intersect with each first finger electrode 22, and is formed so as to be orthogonal to each first finger electrode 22 in this embodiment. That is, the short-circuit preventing groove 56 separates the first finger electrodes 22 in the extending direction. In addition, the short-circuit prevention groove 56 of the present embodiment is formed linearly along the edge of the first functional layer 15.

  Thereafter, a part of the substrate is covered with a mask, and a first inorganic sealing layer 18 is formed by a CVD apparatus as shown in FIG.

At this time, the first inorganic sealing layer 18 is filled in the short-circuit prevention groove 56, and the first inorganic sealing layer 18 and the first electrode layer 13 are directly physically connected inside the short-circuit prevention groove 56. Has been.
At this time, a part of the first electrode layer 13 is exposed from the first inorganic sealing layer 18 to form the first exposed portion 60, and a part of the first auxiliary electrode layer 17 is the first. It is exposed from the inorganic sealing layer 18 and forms a second exposed portion 61.

  Subsequently, the second organic EL panel forming step will be described.

The second functional layer 35 is formed by sequentially stacking the electron injection layer 69, the electron transport layer 68, the light emitting layer 67, the hole transport layer 66, the hole injection layer 65, and the like on the metal electrode substrate 32 by a vacuum deposition apparatus. Thereafter, as shown in FIG. 16, the third electrode layer 36 is formed on the substrate by the sputtering apparatus or the CVD apparatus to form the second organic EL element 40.
At this time, the metal electrode substrate 32 protrudes from the second functional layer 35 and the third electrode layer 36.

Subsequently, a part of the upper surface (light extraction side surface) of the third electrode layer 36 is covered with a mask, and the second inorganic sealing layer 38 is formed by a CVD apparatus as shown in FIG.
At this time, the second inorganic sealing layer 38 covers the second organic EL element 40 in the second non-light emitting region 42, but does not cover the second organic EL element 40 in the second light emitting region 41. That is, the second inorganic sealing layer 38 has an opening 52 surrounding the second organic EL element 40 in the second light emitting region 41 as shown in FIG. The three-electrode layer 36 is exposed.
At this time, a part of the metal electrode substrate 32 is exposed from the second inorganic sealing layer 38 to form a third exposed portion 62.

Thereafter, a part of the substrate on which the second inorganic sealing layer 38 is laminated is covered with a mask, and the second auxiliary electrode layer 37 is laminated as shown in FIG.
At this time, the second auxiliary electrode layer 37 is provided across the third electrode layer 36 exposed from the opening 52 and the second inorganic sealing layer 38 surrounding the third electrode layer 36. A part of the third electrode layer 36 is exposed from the gap between the second finger electrodes 49.

Thereafter, a third inorganic sealing layer 39 is laminated on the substrate on which the second auxiliary electrode layer 37 is laminated by a CVD apparatus as shown in FIG.
At this time, the third inorganic sealing layer 39 is directly laminated on the third electrode layer 36 that is filled with a part of the gap between the second finger electrodes 49 and exposed from the second finger electrode 49.
A part of the second finger electrode 49 in the fourth power feeding region 44 is exposed from the third inorganic sealing layer 39 to form a fourth exposed portion 63.

Next, the panel connection process will be described.
The transparent adhesive resin 4 is adhered onto the third inorganic sealing layer 39 of the second organic EL panel 3, and then the raw material of the hard adhesive layer 7 is applied along the edge of the transparent adhesive resin 4 by a dispenser. Then, the external power supply member 6 is attached to the outside of the hard adhesive layer 7 with the conductive adhesives 8 and 9. Further, the connecting member 5 is also attached to the outside of the hard adhesive layer 7 by a separate process (FIG. 21). Thereafter, the first inorganic sealing layer 18 and the third inorganic sealing layer 39 are bonded together and heated at a predetermined temperature to form the hard adhesive layer 7.

At this time, the first inorganic sealing layer 18 and the third inorganic sealing layer 39 are bonded together by the transparent adhesive resin 4 as shown in FIG. 2, and the first inorganic sealing layer 18, the transparent adhesive resin 4, and the third inorganic sealing layer are bonded together. Each interface of the sealing layer 39 is covered with the hard adhesive layer 7. That is, the hard adhesive layer 7 is formed in an annular shape as shown in FIG. 21, and includes a region including the first light emitting region 25 of the first organic EL panel 2 and a second light emitting region 41 of the second organic EL panel 3. It is formed so as to surround the region to be included.
At this time, the external power supply member 6 is sandwiched between the first organic EL panel 2 and the second organic EL panel 3 via the conductive adhesives 8 and 9 as shown in FIG.

Next, a current flow when an external power source is connected to the organic EL module 1 will be described.
In the organic EL module 1 shown in FIG. 22, the power supply terminal of one pole of the external power supply is connected to the first power supply layer 46 of the external power supply member 6, and the power supply terminal of the other pole of the external power supply is connected to the external power supply member 6. The second power supply layer 47 is connected. In the present embodiment, the anode power supply terminal of the external power supply is connected to the first power supply layer 46 of the external power supply member 6, and the cathode power supply terminal of the external power supply is connected to the second power supply layer 47 of the external power supply member 6. .

First, the current supplied from the external power source is transmitted from the first power feeding layer 46 to the first electrode layer 13 through the conductive adhesive 8 as shown in FIG. The power is transmitted from the power supply region 27 to the first electrode layer 13 in the first light emitting region 25.
The current transmitted to the first electrode layer 13 in the first light emitting region 25 passes through the first functional layer 15 and is transmitted to the second electrode layer 16.
At this time, a voltage is applied to the first functional layer 15, holes and electrons are recombined, and the light emitting layer in the first functional layer 15 emits light.
The current transmitted to the second electrode layer 16 in the first light emitting region 25 reaches the electrode connection band 14 belonging to the second power feeding region 28 via the first auxiliary electrode layer 17, and reaches the electrode connection band 14. Is transmitted to the second auxiliary electrode layer 37 of the second organic EL panel 3 through the connection member 5. The current transmitted to the second auxiliary electrode layer 37 diffuses through the second auxiliary electrode layer 37 and is transmitted from the fourth power supply region 44 to the third electrode layer 36 in the second light emitting region 41. The current transmitted to the third electrode layer 36 in the second light emitting region 41 passes through the second functional layer 35 and is transmitted to the metal electrode substrate 32. At this time, a voltage is applied to the second functional layer 35, holes and electrons are recombined, and the light emitting layer in the second functional layer 35 emits light.
The current transmitted to the metal electrode substrate 32 in the second light emitting region 41 reaches the third power feeding region 43 from the second light emitting region 41 in the metal electrode substrate 32, and the second power feeding layer via the conductive adhesive 9. 47, and returns from the second power supply layer 47 to the external power source.

  Then, the optical path at the time of lighting of the organic EL module 1 is demonstrated.

First, the light emitted from the first organic EL panel 2 will be described. The light generated in the first functional layer 15 is generated on the first electrode layer 13 side and the second side as shown by the solid line and the broken line in FIG. Irradiation is performed on the electrode layer 16 side. The light irradiated to the first electrode layer 13 side indicated by the solid line in FIG. 23A passes through the first electrode layer 13 and the transparent insulating substrate 12 and is extracted outside.
On the other hand, the light extracted to the second electrode layer 16 side indicated by the broken line in FIG. 23A is the first inorganic sealing layer 18, the transparent adhesive resin 4, the third inorganic sealing layer 39, and the third electrode layer 36. The light passes through each layer of the second functional layer 35 and is reflected by the metal electrode substrate 32. The reflected light passes through the second functional layer 35, the third electrode layer 36, the third inorganic sealing layer 39, the transparent adhesive resin 4, the first organic EL panel 2, and the transparent insulation of the first organic EL panel 2. It is taken out from the substrate 12.
As described above, almost all the light emitted from the first organic EL panel 2 is extracted from the transparent insulating substrate 12 side of the first organic EL panel 2.

Next, the light emitted from the second organic EL panel 3 will be described. The light generated in the second functional layer 35 is formed on the third electrode layer 36 side and the metal as shown by the solid line and the broken line in FIG. Irradiation is performed on the electrode substrate 32 side.
The light irradiated to the third electrode layer 36 side indicated by the solid line in FIG. 23B is the third electrode layer 36 and the third inorganic sealing layer 39 of the second organic EL panel 3, the transparent adhesive resin 4, and Then, it passes through each layer of the first organic EL panel 2 and is taken out from the transparent insulating substrate 12 of the first organic EL panel 2.

On the other hand, the light irradiated to the metal electrode substrate 32 side indicated by the broken line in FIG. 23B is totally reflected to the first organic EL panel 2 side because the surface of the metal electrode substrate 32 is a mirror surface. Then, the second functional layer 35, the third electrode layer 36, the third inorganic sealing layer 39, the transparent adhesive resin 4, and the first organic EL panel 2 of the second organic EL panel 3 are transmitted through the first organic EL panel 2. Light is extracted from the second electrode layer 16 side.
Thus, almost all of the light emitted from the second organic EL panel 3 is extracted from the transparent insulating substrate 12 side of the first organic EL panel 2.

  As described above, since almost all of the light generated in the organic EL module 1 is irradiated from the transparent insulating substrate 12 of the first organic EL panel 2, both of the organic EL panels 2 and 3 are organic that exhibits a white emission color. Luminance can be improved by using an EL panel, or by combining organic EL panels 2 and 3 with organic EL panels that exhibit different light emission colors, and adding and mixing light to emit white light.

The first organic EL panel 2 of the organic EL module 1 of the present embodiment includes a short-circuit prevention groove 56.
The function of this short-circuit prevention groove 56 will be described.
In the first organic EL panel forming step, when each first finger electrode 22 of the first auxiliary electrode layer 17 is formed, the film formation surface is covered with a mask, and a plurality of first finger electrodes 22 are formed simultaneously. At this time, the first finger electrode 22 is preferably formed from the end portion to the end portion in the first light emitting region 25 from the viewpoint of assisting the electric conduction of the second electrode layer 16. When each first finger electrode 22 is formed to the very end, the end of each first finger electrode 22 is theoretically aligned, but in reality, each first finger electrode 22 is formed as shown in FIG. Variations will occur at the ends. Therefore, depending on the case, a part of the first finger electrode 22 may come into contact with the first electrode layer 13 to cause a short circuit. Therefore, in the organic EL module 1 of the present embodiment, the first finger electrode 22 and the layer laminated on the first electrode layer 13 are removed by laser scribing at the boundary between the first light emitting region 25 and the first power feeding region 27. ing. For this reason, the portion separated by the first power feeding region 27 does not contribute electrically to light emission during driving, and therefore even if a part of the first finger electrode 22 is in contact with the first electrode layer 13. , Never short circuit. Therefore, the organic EL module 1 of this embodiment has high reliability.

  Moreover, since the organic EL panel 1 of this embodiment can form each organic EL panel 2 and 3 by another process, it can improve manufacturing efficiency.

  In the organic EL module 1 of the present embodiment, a first organic EL panel 2 and a second organic EL panel 3 are electrically connected in series. Further, a portion where the current is supplied from the external power supply member 6 to the first organic EL panel 2 (first exposed portion 60) and a portion where the current is supplied from the second organic EL panel 3 to the external power supply member 6 (third exposed portion 62). Are in positions opposite to each other in the member thickness direction, and the second exposed portion 61 and the fourth exposed portion 63 are the first exposed portion 60 and the third exposed portion 62, and the first light emitting region 25 and the second light emitting region 41. Therefore, the direction in which the current flows in the first organic EL panel 2 and the direction in which the current flows in the second organic EL panel 3 flow in opposite directions. Therefore, the luminance unevenness of the light emitted from the first organic EL panel 2 and the luminance unevenness of the light emitted from the second organic EL panel 3 can be complemented to make the luminance uniform.

  In the organic EL module 1 according to the present embodiment, the first organic EL panel 2 and the second organic EL panel 3 are electrically connected in series by using the connection member 5, so that power is supplied from the outside by a pair of power supply terminals. Is possible.

  Since the organic EL panels 2 and 3 of the organic EL module 1 of the present embodiment can use an organic EL panel having a conventional configuration, the versatility is high and the cost can be reduced.

  In the organic EL module 1 of the present embodiment, since the first power supply layer 46 and the second power supply layer 47 of the external power supply member 6 face outward in the thickness direction, power can be easily supplied from the outside.

  In the organic EL module 1 of the present embodiment, the metal electrode substrate 32 has a mirror surface at least on the second functional layer 35 side. That is, almost all of the light generated from the second organic EL panel 3 can be irradiated to the transparent insulating substrate 12 side of the first organic EL panel 2, and further, the first organic EL panel 2 to the second organic EL panel 3 can be irradiated. The light emitted toward the side is also reflected by the metal electrode substrate 32 of the second organic EL panel 3, and almost all can be irradiated to the transparent insulating substrate 12 side of the first organic EL panel 2, so that the organic EL module The amount of light per unit area of one whole can be increased.

The organic EL module 1 according to the present embodiment employs an adhesive having a sheet-like shape before bonding as the transparent adhesive resin 4. Therefore, for example, even if the organic EL panels 2 and 3 having a large light emitting area are used, the thickness of the transparent adhesive resin 4 can be made uniform.
In addition, since a solid adhesive is used, unlike the case where the transparent adhesive resin 4 is formed using a liquid adhesive, air enters the inside of the adhesive during solidification, so-called air clogging. Problems are less likely to occur. Furthermore, compared with the case where the transparent adhesive resin 4 is formed using a liquid adhesive, it is possible to suppress an increase in application time associated with the panel area expansion, and to improve manufacturing efficiency.

  In the organic EL module 1 of the present embodiment, the organic EL elements 20 and 40 in the light emitting regions 25 and 41 of the organic EL panels 2 and 3 are primarily sealed with the inorganic sealing layers 18, 38, and 39. Since the secondary sealing is performed by the hard adhesive layer 7, the sealing performance is high.

  Finally, the configuration of each layer of the organic EL module 1 will be described.

The transparent insulating substrate 12 has translucency and insulating properties. Specifically, a glass substrate such as soda-lime glass or non-alkali glass can be employed.
The transparent insulating substrate 12 has a circular shape or a polygonal shape, and a rectangular shape is preferable among them. In this embodiment, a rectangular glass substrate is employed.

The metal electrode substrate 32 is a conductive substrate having electrical conductivity and is a substrate containing metal. Specifically, the metal electrode substrate 32 is formed of any one of a metal plate, a laminated structure of a metal plate and a metal electrode layer, and a laminated structure of an insulating substrate and a metal electrode layer.
Although it does not specifically limit as a metal which comprises a metal substrate and a metal electrode layer, For example, metals, such as silver (Ag) and aluminum (Al), are mentioned.
Moreover, what comprises an insulating substrate can employ | adopt the glass substrate made from soda-lime glass, an alkali free glass, etc.

The metal electrode substrate 32 has the same or similar shape as the transparent insulating substrate 12, and in this embodiment, has the same shape. That is, the metal electrode substrate 32 has a rectangular shape.
Further, the metal electrode substrate 32 has a mirror surface at least on the second functional layer 35 side.

The material of the first electrode layer 13 and the third electrode layer 36 is not particularly limited as long as it has optical transparency and conductivity. For example, indium tin oxide (ITO), indium zinc oxide Transparent conductive oxides such as (IZO), tin oxide (SnO ₂ ), and zinc oxide (ZnO) are employed. ITO or IZO with high transparency is particularly preferable in that light generated from the light emitting layer in the first functional layer 15 or the second functional layer 35 can be effectively extracted. In the present embodiment, both the first electrode layer 13 and the third electrode layer 36 employ ITO.
The first electrode layer 13 and the third electrode layer 36 are preferably formed by sputtering.

The material of the 2nd electrode layer 16 (metal thin film layer) will not be specifically limited if it has electronic conductivity, For example, metals, such as silver (Ag) and aluminum (Al), are mentioned.
The second electrode layer 16 of the present embodiment is formed of a metal whose main component is silver (for example, silver alone). The electrical conductivity (conductivity) of the second electrode layer 16 is larger than that of the first electrode layer 13.
The average film thickness of the second electrode layer 16 is 3 nm to 50 nm and is extremely thin. Therefore, light can be transmitted.

  The first functional layer 15 is a layer provided between the first electrode layer 13 and the second electrode layer 16 and having at least one light emitting layer. The first functional layer 15 is composed of a plurality of layers mainly made of an organic compound. The first functional layer 15 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 first functional layer 15 has a hole injection layer 65, a hole transport layer 66, and light emission from the first electrode layer 13 side to the second electrode layer 16 side, similarly to the second functional layer 35 described later. A multilayer structure including a plurality of layers such as the layer 67, the electron transport layer 68, and the electron injection layer 69 may be used.

The second functional layer 35 is a layer provided between the metal electrode substrate 32 and the third electrode layer 36 and having at least one light emitting layer. The second functional layer 35 is composed of a plurality of layers mainly made of organic compounds.
As shown in FIG. 3, the second functional layer 35 of the present embodiment includes a hole injection layer 65, a hole transport layer 66, a light emitting layer 67, and an electron transport from the third electrode layer 36 side to the metal electrode substrate 32 side. The layer 68 and the electron injection layer 69 are laminated.

The hole injection layer 65 (metal oxide layer) is a layer that takes holes from the anode (third electrode layer 36). As the hole injection layer 65, metal oxides such as vanadium oxide, molybdenum oxide, ruthenium oxide, aluminum oxide, and titanium oxide can be employed. Among them, in the present embodiment, as described above, ITO is employed as the third electrode layer 36, so that the metal oxide mainly composed of molybdenum oxide is used as the hole injection layer 65 from the viewpoint of efficiently injecting holes. The thing is adopted.
The average film thickness of the hole injection layer 65 is not less than 1 nm and not more than 100 nm, and is extremely thin. Therefore, light can be transmitted.

  The hole transport layer 66 is a layer that restricts the movement of electrons to the anode side (second electrode layer 16 side) while efficiently transporting holes from the hole injection layer side.

  The light-emitting layer 67 is a light-emitting layer having at least one of a hole transport property and an electron transport property. When an electric field is applied, a hole flowing from the hole transport layer 66 and an electron transport layer 68 are formed. This is a layer in which light-emitting excitons are generated by combining with electrons flowing in from.

  The electron transport layer 68 is a layer that limits the movement of holes to the cathode (metal electrode substrate 32) side while efficiently transporting electrons from the electron injection layer 69 side.

  The electron injection layer 69 is a layer that takes electrons from the metal electrode substrate 32.

  The 1st inorganic sealing layer 18 and the 2nd inorganic sealing layer 38 are layers which seal the 1st organic EL element 20 or the 2nd organic EL element 40, and have translucency and gas impermeableness. Yes. As the 1st inorganic sealing layer 18 and the 2nd inorganic sealing layer 38, if it has translucency and gas non-permeability, it will not specifically limit, A well-known substance can be used. For example, metal oxide (MO), metal nitride (MN), metal carbide (MC), etc. can be employed. M represents a metal. Silicon nitride and silicon oxide made of Si—N, Si—H, N—H, or the like, and silicon oxynitride that is an intermediate solid solution of both are preferable.

  The 3rd inorganic sealing layer 39 is a layer which seals the 2nd organic EL element 40, and has gas impermeableness. In other words, unlike the second inorganic sealing layer 38, the third inorganic sealing layer 39 may be one that does not have translucency. The third inorganic sealing layer 39 is not particularly limited as long as it has gas impermeability, and a known substance can be used. For example, metal oxide (MO), metal nitride (MN), metal carbide (MC), etc. can be employed. M represents a metal. Silicon nitride and silicon oxide made of Si—N, Si—H, N—H, or the like, and silicon oxynitride that is an intermediate solid solution of both are preferable.

The 1st finger electrode 22 and the 2nd finger electrode 49 are thin wire-like conductive members.
The material of the first finger electrode 22 and the second finger electrode 49 is not particularly limited as long as it has higher conductivity than the second electrode layer 16 or the third electrode layer 36, but the viewpoint that the resistivity is low. Therefore, metal materials such as gold, silver, copper, nickel, and chromium are preferable.

The widths of the first finger electrode 22 and the second finger electrode 49 are appropriately selected depending on the number and interval of the first finger electrode 22 and the second finger electrode 49 provided, and are preferably 50 μm or more and 100 μm or less, and 50 μm. More preferably, it is 80 μm or less.
If it exceeds 100 μm, the light generated in the first functional layer 15 and the light generated in the second functional layer 35 may be blocked during driving (lighting), and the light extraction efficiency may be reduced. If the thickness is less than 50 μm, sufficient electrical conduction may not be achieved, or disconnection may occur during energization (driving).

  In the above-described embodiment, the transparent adhesive resin 4 is formed and bonded to the entire interface between the first inorganic sealing layer 18 and the third inorganic sealing layer 39, but the present invention is not limited to this, and the first The transparent adhesive resin 4 may be formed and bonded only to the overlapping portion of the first non-light emitting region 26 of the organic EL panel 2 and the second non-light emitting region 42 of the second organic EL panel 3.

  In the above-described embodiment, the transparent adhesive resin 4 is formed and bonded to the entire interface between the first inorganic sealing layer 18 and the third inorganic sealing layer 39, but the present invention is not limited to this. As in 25, the first inorganic sealing layer 18 and the third inorganic sealing layer 39 may be bonded together by another member 100 such as a frame.

  In the above-described embodiment, a foil-like conductive member is employed as the connection member 5, but the present invention is not limited to this, and a conductive adhesive such as an anisotropic conductive film or a low-temperature solder may be used. Good.

DESCRIPTION OF SYMBOLS 1 Organic EL module 2 1st organic EL panel 3 2nd organic EL panel 4 Transparent adhesive resin (transparent resin)
5 Connection member 6 External power supply member 12 Transparent insulating substrate (first substrate)
13 1st electrode layer 14 Electrode connection zone 15 1st functional layer (1st organic light emitting layer)
16 Second electrode layer (metal thin film layer)
17 First auxiliary electrode layer (auxiliary electrode layer)
22 First finger electrode 25 First light emitting region 32 Metal electrode substrate 35 Second functional layer (second organic light emitting layer)
36 3rd electrode layer 37 2nd auxiliary electrode layer 41 2nd light emission area | region 46 1st electric power feeding layer (1st electric power feeding part)
47 Second feeding layer (second feeding part)
49 Second finger electrode 65 Hole injection layer (metal oxide layer)

Claims (6)

A first organic EL panel having a first laminate including a first electrode layer, a first organic light emitting layer, and a second electrode layer on one main surface of the first substrate, and one main surface of the metal electrode substrate In the organic EL module including the second organic EL panel having the second stacked body in which the second organic light emitting layer and the third electrode layer are stacked on the surface,
The first organic EL panel is a bottom emission type organic EL panel that extracts light from the first substrate side, and all of the first substrate, the first electrode layer, and the second electrode layer have translucency. And
The second organic EL panel is a top emission type organic EL panel that extracts light from the third electrode layer side, and at least the third electrode layer has translucency,
The metal electrode substrate is formed of any one of a metal plate, a laminated structure of a metal plate and a metal electrode layer, and a laminated structure of an insulating substrate and a metal electrode layer,
In the first organic EL panel and the second organic EL panel, the main surface of the first substrate and the main surface of the metal electrode substrate are opposed to each other, and the first light emitting region and the first light emitting region that emit light when the first organic EL panel is driven 2 The second light emitting region that emits light when driving the organic EL panel is integrated so as to be substantially coincident with the stacking direction,
The light emitted from the first organic EL panel and the light emitted from the second organic EL panel can be irradiated in the same direction,
The first organic EL panel and the second organic EL panel are electrically connected in series ,
It has an external power supply member that spreads in a plane,
The external power supply member is provided with a first power supply unit on the front surface and a second power supply unit on the back surface,
A part of the first power feeding part and the second power feeding part is interposed between the first electrode layer and the metal electrode substrate,
The first power feeding unit is electrically connected to the first stacked body in the first light emitting region via the first electrode layer,
The organic EL module, wherein the second power feeding unit is electrically connected to the second stacked body in the second light emitting region via the metal electrode substrate . A connection member for electrically connecting the first organic EL panel and the second organic EL panel;
The connection member is arranged on the side surfaces of the first organic EL panel and the second organic EL panel,
The first organic EL panel has a first auxiliary electrode layer having a larger conductivity than the second electrode layer,
2. The organic material according to claim 1, wherein the first auxiliary electrode layer is in contact with the second electrode layer and extends from the side surface side of the first organic EL panel toward the opposite side surface side. EL module. The second organic EL panel has a metal oxide layer having a hole injection property,
The metal oxide layer is between the second organic light emitting layer and the third electrode layer and is in direct contact with the third electrode layer;
The organic EL module according to claim 1 or 2 , wherein an average thickness of the metal oxide layer is 1 nm or more and 100 nm or less. The organic EL module according to claim 3 , wherein the metal oxide layer contains molybdenum oxide. The first organic EL panel has a first auxiliary electrode layer having a larger conductivity than the second electrode layer,
The first auxiliary electrode layer has a first finger electrode extending linearly,
The first finger electrode has a higher conductivity than the second electrode layer and is in direct contact with the second electrode layer,
The first finger electrode is located outside the first light-emitting area, and the first electrode layer and the second electrode layer Te superimposed portions smell of the second electrode layer and the first finger when the first substrate in plan the organic EL module according to any one of claims 1 to 4 electrode is characterized in that it is separated in the stretching direction. The first organic EL panel has a first auxiliary electrode layer having a larger conductivity than the second electrode layer,
The first electrode layer has a strip-like extended electrode connection band outside the first light emitting region,
The first auxiliary electrode layer has a plurality of first finger electrodes,
The first finger electrode has a higher conductivity than the second electrode layer and is in direct contact with the second electrode layer,
The organic EL module according to any one of claims 1 to 5 , wherein one end of the first finger electrode is physically connected to the electrode connection band.

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