WO2015194156A1 - Light emitting device - Google Patents

Light emitting device Download PDF

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Publication number
WO2015194156A1
WO2015194156A1 PCT/JP2015/002983 JP2015002983W WO2015194156A1 WO 2015194156 A1 WO2015194156 A1 WO 2015194156A1 JP 2015002983 W JP2015002983 W JP 2015002983W WO 2015194156 A1 WO2015194156 A1 WO 2015194156A1
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WO
WIPO (PCT)
Prior art keywords
substrate
intermediate layer
filler
light emitting
emitting device
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PCT/JP2015/002983
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French (fr)
Japanese (ja)
Inventor
真 白川
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パナソニックＩｐマネジメント株式会社
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Publication of WO2015194156A1 publication Critical patent/WO2015194156A1/en

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    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B33/00—Electroluminescent light sources
    • H05B33/02—Details
    • H05B33/04—Sealing arrangements, e.g. against humidity

Definitions

  • the present invention relates to a light emitting device, and more particularly, to a light emitting device (organic electroluminescent element) including an organic light emitter.
  • an organic electroluminescent element having a sealed structure is known as a light emitting device (see Japanese Patent Publication No. 2007-073459).
  • the organic electroluminescent element there is a possibility that the organic luminescent material may be deteriorated by moisture that has been transmitted from the outside into the organic electroluminescent element.
  • the present invention provides a light emitting device with improved waterproofness.
  • One embodiment of a light-emitting device includes a light-transmitting first substrate, a second substrate facing the first substrate, and between the first substrate and the second substrate.
  • An organic light emitter disposed on a side wall provided on an outer peripheral portion between the first substrate and the second substrate; the first substrate; the second substrate; the organic light emitter;
  • a filler formed of a curable resin and filled in a space formed by the side wall.
  • the light emitting device further includes an intermediate layer made of a curable resin between the side wall and the filler. The intermediate layer has a lower degree of curing than the filler.
  • FIG. 1 is a thickness direction cross-sectional view of an organic electroluminescent element according to Embodiment 1.
  • FIG. 1 is a plan view of an organic electroluminescent element according to Embodiment 1.
  • FIG. 5 is a cross-sectional view in the thickness direction of an organic electroluminescent element according to Embodiment 2.
  • FIG. 5 is a cross-sectional view in the thickness direction of an organic electroluminescent element according to Embodiment 3.
  • FIG. 6 is a cross-sectional view in the thickness direction of an organic electroluminescent element according to Embodiment 4.
  • FIG. 7 is a cross-sectional view in the thickness direction of an organic electroluminescent element according to Embodiment 5.
  • 7 is a cross-sectional view in the thickness direction of an organic electroluminescent element according to Embodiment 6.
  • the light-emitting device shown in the following embodiments is an organic electroluminescent element including an organic light emitter.
  • the light-emitting device of each embodiment has translucency and is the 1st board
  • the organic light-emitting body 6 provided on 1 and opposed to the second substrate 2 with a space therebetween, and the side wall 7 made of a curable resin, provided on the outer peripheral portion between the first substrate 1 and the second substrate 2.
  • the first substrate 1, the second substrate 2, the organic light emitting body 6, and the side wall 7 are filled with a filler 8 made of a curable resin.
  • the organic light-emitting body 6 is formed by laminating a first electrode 3, an organic light-emitting layer 4, and a second electrode 5 in order from the first substrate 1 side.
  • the organic electroluminescent element according to Embodiment 1 is the thickness of the organic electroluminescent element provided between the first substrate 1 and the second substrate 2 between the sidewall 7 and the filler 8.
  • the intermediate layer 9 has a rectangular cross section in the direction.
  • the side wall 7 and the filler 8 are each formed of a photocurable resin.
  • the intermediate layer 9 has a lower degree of curing than the photocurable resin used as the side wall 7 and the photocurable resin used as the filler 8, and has a light refractive index higher than that of the first substrate 1 and the second substrate 2. It is formed by a small photocurable resin.
  • the degree of cure of the photocurable resin used as the side wall 7 and the photocurable resin used as the filler 8 is not particularly limited.
  • the degree of cure in the case of using a photocurable resin is determined by the remaining amount of epoxy groups after irradiation with a predetermined amount of UV light.
  • the light emitting device according to the first embodiment includes a first substrate 1, a second substrate 2, an organic light emitter 6, a side wall 7, and a filler 8. .
  • the first substrate 1 and the second substrate 2 are arranged to face each other with a predetermined interval.
  • the first substrate 1 and the second substrate 2 are rectangular and have the same size.
  • the first substrate 1 and the second substrate 2 have translucency.
  • the first substrate 1 and the second substrate 2 are, for example, glass substrates.
  • the material of the glass substrate is, for example, inorganic glass such as alkali glass, non-alkali glass, or quartz glass.
  • the organic light emitter 6 is provided on the first substrate 1 between the first substrate 1 and the second substrate 2 and faces the second substrate 2 with a gap.
  • the organic light emitter 6 is disposed in the center of the first substrate 1.
  • the organic light emitter 6 is formed by laminating a first electrode 3, an organic light emitting layer 4, and a second electrode 5 in order from the first substrate 1 side. Moreover, the 1st electrode 3 and the 2nd electrode 5 have translucency.
  • the side wall 7 is provided on the outer peripheral portion of the first substrate 1 and the second substrate 2.
  • the side wall 7 surrounds the organic light emitter 6 in a plane orthogonal to the direction in which the first substrate 1 and the second substrate 2 face each other (vertical direction in FIG. 1, ie, the thickness direction of the light emitting device). It is formed.
  • the side wall 7 has a rectangular frame shape.
  • the filler 8 is filled in the space formed by the first substrate 1, the second substrate 2, the organic light emitter 6, and the side wall 7. That is, the filler 8 seals the organic light-emitting body 6 in a region surrounded by the first substrate 1, the second substrate 2, and the side wall 7. Moreover, the filler 8 has translucency.
  • the intermediate layer 9 is formed between the side wall 7 and the filler 8.
  • the intermediate layer 9 is provided from the first substrate 1 to the second substrate 2. That is, the intermediate layer 9 has a rectangular frame shape.
  • the intermediate layer 9 has translucency and has a refractive index smaller than that of the first substrate 1 and the second substrate 2.
  • the side wall 7, the filler 8, and the intermediate layer 9 are formed of a curable resin, in particular, a photocurable resin.
  • the side wall 7, the filler 8, and the intermediate layer 9 are formed of different curable resins.
  • the curable resin of the side wall 7 is the first curable resin
  • the curable resin of the filler 8 is the second curable resin
  • the curable resin of the intermediate layer 9 is the third curable resin. That's it.
  • the curable resin (curable resin composition) used as the first to third curable resins is selected so that the degree of cure is an index of the hardness of the curable resin with respect to predetermined curing conditions.
  • the degree of cure indicates the hardness of the curable resin immediately after the curable resin is cured under predetermined curing conditions.
  • the predetermined curing condition is, for example, irradiation with a predetermined amount of UV light.
  • the curable resin includes a resin containing an epoxy group and a curing agent that binds to the epoxy group.
  • the amount of epoxy group and the amount of curing agent decrease as the curing proceeds. Therefore, the degree of cure of the curable resin is determined by the remaining amount of epoxy groups immediately after the curable resin is cured under predetermined curing conditions. That is, the higher the remaining amount of epoxy groups, the lower the degree of curing, and the lower the remaining amount of epoxy groups, the higher the degree of curing. Similarly, the greater the remaining amount of the curing agent, the lower the curing degree, and the smaller the remaining amount of the curing agent, the higher the curing degree.
  • the degree of cure of the curable resin is directly linked to the hardness of the curable resin.
  • the degree of cure can be evaluated from the hardness of the curable resin. That is, the degree of cure of the first curable resin, the second curable resin, and the third curable resin can be compared from the hardness of the side wall 7, the filler 8, and the intermediate layer 9. For example, if the curable resin is hard, the degree of cure of the curable resin is large.
  • the curability is increased.
  • the hardness of the resin will not change. Therefore, there is no correlation between the degree of cure (remaining amount of epoxy group) and the hardness of the curable resin. Therefore, it becomes difficult to evaluate the degree of curing from the hardness of the curable resin.
  • the degree of curing of the curable resin can be evaluated from the remaining amount of the curing agent. That is, the degree of cure of the first curable resin, the second curable resin, and the third curable resin can be compared from the remaining amount of the curing agent contained in the side wall 7, the filler 8, and the intermediate layer 9. .
  • the third curable resin has a smaller degree of curing than the first curable resin and the second curable resin (the intermediate layer 9 has a smaller degree of curing than the side wall 7 and the filler 8). This means that after curing, the first curable resin and the second curable resin are harder than the third curable resin.
  • the first to third curable resins preferably have a curing degree of 60% or more.
  • the third curable resin preferably has a degree of cure of less than 75%, and the first and second curable resins preferably have a degree of cure of 75% or more.
  • the viscosity of the first to third curable resins before curing is appropriately adjusted so that the light emitting device can be easily manufactured.
  • the first curable resin preferably has a relatively large viscosity so that it can remain in a predetermined position as the material of the side wall 7.
  • the third curable resin preferably has a relatively large viscosity so that it can remain in place as the material of the intermediate layer 9.
  • the second curable resin preferably has a relatively low viscosity so that the space formed by the first substrate 1, the second substrate 2, the organic light emitter 6, and the side wall 7 can be sufficiently filled.
  • the first to third curable resins before curing are preferably not mixed with each other.
  • the light-emitting device of Embodiment 1 is manufactured as follows, for example. First, the organic light emitter 6 is formed on the first substrate 1. Further, the first curable resin for the side wall 7 and the third curable resin for the intermediate layer 9 are applied on the first substrate 1. Next, the second curable resin for the filler 8 is put in the space surrounded by the side wall 7, and the second substrate 2 is placed on the first substrate 1. Next, a predetermined amount of UV light is irradiated to cure the first to third curable resins to form the side wall 7, the filler 8, and the intermediate layer 9. The substrate 2 is bonded.
  • the degree of cure of the third curable resin is smaller than the degree of cure of the first and second curable resins, the intermediate layer 9 according to the change in the shape of the first and second curable resins due to curing.
  • the third curable resin becomes. Therefore, it can suppress that a clearance gap produces between the side wall 7 (1st curable resin) and the filler 8 (2nd curable resin).
  • the distance (gap) between the first substrate 1 and the second substrate 2 must be at least larger than the thickness of the element portion (the total thickness of the layers constituting the organic light-emitting body 6). is there.
  • the distance between the first substrate 1 and the second substrate 2 is 10 ⁇ m or more in order not to cause a reliability failure due to particles generated in the filling material 8 or particles generated during manufacturing. It is preferable.
  • the thickness of the side wall 7 is preferably 0.7 mm to 1.5 mm.
  • the thickness of the side wall 7 is a dimension between the outer surface (surface opposite to the organic light emitter 6) and the inner surface (surface facing the organic light emitter 6 side) of the side wall 7.
  • the thickness of the intermediate layer 9 is preferably 1/20 or less and 1/2 or less of the thickness of the side wall 7. In particular, the thickness of the intermediate layer 9 is preferably 50 ⁇ m to 700 ⁇ m.
  • the thickness of the intermediate layer 9 is a dimension between the outer surface (surface opposite to the organic light emitter 6) and the inner surface (surface facing the organic light emitter 6) of the intermediate layer 9.
  • the gap generated between the side wall 7 and the filler 8 near the interface becomes smaller as the side wall 7 is thicker. In particular, when the thickness of the sidewall 7 is 2000 ⁇ m or more, almost no gap is generated.
  • the gap hardly occurs when the total thickness of the side wall 7 and the intermediate layer 9 is 1000 ⁇ m or more. Therefore, by providing the intermediate layer 9, the thickness of the frame surrounding the space in which the organic light emitter 6 is accommodated (the thickness of the side wall 7 when the intermediate layer 9 is not present, and the side wall 7 when the intermediate layer 9 is present). And the total thickness of the intermediate layer 9) can be reduced.
  • the light-emitting device has a light-transmitting property, and the first substrate 1 and the second substrate 2 facing each other, and the first substrate 1 and the second substrate. 2, an organic light-emitting body 6 provided on the first substrate 1 and facing the second substrate 2 with a space therebetween, the first substrate 1 and the second substrate 2. Between the side wall 7 made of a curable resin, the first substrate 1, the second substrate 2, the organic light-emitting body 6, and the side wall 7 to be filled and cured. And a filler 8 made of a functional resin.
  • the light emitting device includes an intermediate layer 9 made of a curable resin having a lower degree of curing than the side wall 7 and the filler 8 between the side wall 7 and the filler 8.
  • the light emitting device (organic electroluminescent element) of the second embodiment is different from the light emitting device of the first embodiment in that an intermediate layer 10 is provided instead of the intermediate layer 9.
  • an intermediate layer 10 is provided instead of the intermediate layer 9.
  • middle layer 9 of Embodiment 2 are the same as Embodiment 1, the same code
  • the organic electroluminescent element according to Embodiment 2 has an intermediate layer 10 between the side wall 7 and the filler 8 as shown in FIG.
  • the intermediate layer 10 has a lower degree of curing than the photocurable resin used as the side wall 7 and the photocurable resin used as the filler 8, and has a light refractive index that is higher than that of the first substrate 1 and the second substrate 2. It is formed by a small photocurable resin.
  • the intermediate layer 10 is provided from the first substrate 1 to the second substrate 2, and has an inclined surface 100 so that the thickness becomes the thickest at the portion in contact with the first substrate 1 and the second substrate 2.
  • the cross-sectional shape of the intermediate layer 10 in the thickness direction of the organic electroluminescent element is a shape in which one side of the rectangle is curved in a concave shape. In other words, the thickness of the intermediate layer 10 increases from the portion between the first substrate 1 and the second substrate 2 toward the portion in contact with the first substrate 1 and the portion in contact with the second substrate 2.
  • the surface 100 on the filler side of the intermediate layer 10 is inclined. That is, the intermediate layer 10 is formed such that the inner surface (surface facing the filler 8) 100 is a concave surface.
  • the intermediate layer 10 is formed of the same curable resin as that of the intermediate layer 9.
  • the amount of moisture that permeates the interface between the first substrate 1 and the second substrate 2 and the side wall 7 is larger than the amount of moisture that permeates the side wall 7. Therefore, by increasing the thickness of the intermediate layer 10 near the first substrate 1 and the second substrate 2, it is possible to efficiently suppress moisture from reaching the organic light emitter 6.
  • the light emitted from the organic light emitter 6 is refracted in the direction of the first substrate 1 and the second substrate 2 by the inclined surface of the intermediate layer 10, and the light is efficiently reflected. It can be pulled out from one substrate 1 and the second substrate 2.
  • the light emitting device (organic electroluminescent element) of the third embodiment is different from the light emitting device of the first embodiment in that an intermediate layer 90 is provided instead of the intermediate layer 9.
  • an intermediate layer 90 of Embodiment 3 since structures other than the intermediate
  • the intermediate layer 90 includes a first intermediate layer 11 provided on the first substrate 1 and a second intermediate layer 12 provided on the second substrate 2.
  • the first intermediate layer 11 and the second intermediate layer 12 are spaced from each other (in the thickness direction of the light emitting device).
  • the first intermediate layer 11 and the second intermediate layer 12 both have a rectangular frame shape, and the cross section thereof is a rectangular shape.
  • the first and second intermediate layers 11 and 12 are formed of the same curable resin as the intermediate layer 9. Therefore, the first intermediate layer 11 has translucency and a refractive index smaller than that of the first substrate 1. Similarly, the second intermediate layer 12 has translucency and a refractive index smaller than that of the second substrate 2.
  • the organic electroluminescent element according to Embodiment 3 is spaced from the side wall 7 and the filler 8 between the first substrate 1 side and the second substrate 2 side as shown in FIG.
  • the first intermediate layer 11 and the second intermediate layer 12 are provided.
  • the first intermediate layer 11 is provided on the first substrate 1, and the second intermediate layer 12 is provided on the second substrate 2.
  • the cross-sectional shapes of the first intermediate layer 11 and the second intermediate layer 12 in the thickness direction of the organic electroluminescent element are rectangular.
  • the first intermediate layer 11 and the second intermediate layer 12 have a lower degree of curing than the photocurable resin used as the side wall 7 and the photocurable resin used as the filler 8, and the first substrate 1 and the second intermediate layer 12. It is made of a photocurable resin having a light refractive index smaller than that of the substrate 2.
  • the light emitting device of Embodiment 3 is manufactured as follows, for example. First, the organic light emitter 6 is formed on the first substrate 1. Further, the first curable resin for the side wall 7 and the third curable resin for the first intermediate layer 11 are applied on the first substrate 1, and the second intermediate layer is applied on the second substrate 2. A third curable resin for 12 is applied. Next, the second curable resin for the filler 8 is put in the space surrounded by the side wall 7, and the second substrate 2 is placed on the first substrate 1. Next, a predetermined amount of UV light is irradiated to cure the first to third curable resins to form the side wall 7, the filler 8, and the first and second intermediate layers 11 and 12. The substrate 1 and the second substrate 2 are joined.
  • the degree of cure of the third curable resin is smaller than the degree of cure of the first and second curable resins.
  • the distance (gap) between the first substrate 1 and the second substrate 2 is preferably 50 ⁇ m or more in order to provide the first and second intermediate layers 11 and 12.
  • the height of the first and second intermediate layers 11 and 12 (the vertical dimension in FIG. 3) is preferably about one third or less of the gap.
  • the aspect ratio of the first and second intermediate layers 11 and 12 (that is, the ratio of thickness to height) is preferably 2: 1.
  • the organic electroluminescent element according to the present embodiment forms the intermediate layer (first and second intermediate layers 11 and 12) with a small amount of resin, and the amount of moisture to be transmitted is larger than that of the other portions. It is possible to suppress the generation of a gap between the side wall 7 and the filler 8 in the vicinity of the interface between the substrate 1 and the second substrate 2 and the side wall 7.
  • the light emitting device (organic electroluminescent element) of the fourth embodiment is different from the light emitting device of the first embodiment in that an intermediate layer 91 is provided instead of the intermediate layer 9.
  • an intermediate layer 91 is provided instead of the intermediate layer 9.
  • symbol as Embodiment 1 is attached
  • subjected and description is abbreviate
  • the intermediate layer 91 includes a first intermediate layer 13 provided on the first substrate 1 and a second intermediate layer 14 provided on the second substrate 2.
  • the first intermediate layer 13 and the second intermediate layer 14 are spaced from each other (in the thickness direction of the light emitting device).
  • the first intermediate layer 13 has a rectangular frame shape, and its cross section has a right triangle shape. Therefore, the surface 131 on the filler 8 side of the first intermediate layer 13 is inclined so that the thickness of the first intermediate layer 13 increases from the second substrate 2 side toward the first substrate 1 side. . Further, the surface 131 on the filler 8 side of the first intermediate layer 13 is a flat surface.
  • the second intermediate layer 14 has a rectangular frame shape, and its cross section has a right triangle shape. Therefore, the surface 141 on the filler 8 side of the second intermediate layer 14 is inclined so that the thickness of the second intermediate layer 14 increases from the first substrate 1 side toward the second substrate 2 side. . Further, the surface 141 on the filler 8 side of the second intermediate layer 14 is a flat surface.
  • the first and second intermediate layers 13 and 14 are formed of the same curable resin as that of the intermediate layer 9. Therefore, the first intermediate layer 13 has translucency and a refractive index smaller than that of the first substrate 1. Similarly, the second intermediate layer 14 is translucent and has a lower refractive index than the second substrate 2.
  • the organic electroluminescent element according to Embodiment 4 is spaced from the side wall 7 and the filler 8 between the first substrate 1 side and the second substrate 2 side as shown in FIG.
  • the first intermediate layer 13 and the second intermediate layer 14 are provided.
  • the first intermediate layer 13 and the second intermediate layer 14 have a lower degree of curing than the photocurable resin used as the side wall 7 and the photocurable resin used as the filler 8, and the first substrate 1 and the second intermediate layer 14. It is made of a photocurable resin having a light refractive index smaller than that of the substrate 2.
  • the cross-sectional shape of the first intermediate layer 13 and the second intermediate layer 14 in the thickness direction of the organic electroluminescent element is a right triangle, and the first intermediate layer 13 has a portion close to the first substrate 1 in the first direction.
  • the second intermediate layer 14 has an inclined surface so that a portion near the second substrate 2 is thickened.
  • the first intermediate layer 13 and the second intermediate layer 14 are formed with a small amount of resin, and the first substrate 1 and the first substrate 1 have a larger amount of permeated moisture than other portions.
  • the generation of a gap between the side wall 7 and the filler 8 is suppressed, and light radiated from the organic light emitter 6 due to refraction by the inclined surface is transmitted to the first substrate 1. And can be pulled out in the direction of the second substrate 2.
  • the light emitting device (organic electroluminescent element) of the fifth embodiment is different from the light emitting device of the first embodiment in that an intermediate layer 92 is provided instead of the intermediate layer 9.
  • an intermediate layer 92 of Embodiment 5 since structures other than the intermediate
  • the intermediate layer 92 includes a first intermediate layer 15 provided on the first substrate 1 and a second intermediate layer 16 provided on the second substrate 2.
  • the first intermediate layer 15 and the second intermediate layer 16 are spaced from each other.
  • the first intermediate layer 15 has a rectangular frame shape, and its cross section has a right trapezoidal shape. Therefore, the surface (side surface) 151 on the filler 8 side of the first intermediate layer 15 is inclined so that the thickness of the first intermediate layer 15 increases from the second substrate 2 side toward the first substrate 1 side. is doing. Further, the surface 151 on the filler 8 side of the first intermediate layer 15 is a flat surface. Here, the inclination angle of the surface 151 of the first intermediate layer 15 on the filler 8 side is larger than the inclination angle of the surface 131 of the first intermediate layer 13 on the filler 8 side.
  • the second intermediate layer 16 has a rectangular frame shape, and its cross section has a right trapezoidal shape. Accordingly, the surface (side surface) 161 on the filler 8 side of the second intermediate layer 14 is inclined so that the thickness of the second intermediate layer 16 increases from the first substrate 1 side toward the second substrate 2 side. is doing. Further, the surface 161 on the filler 8 side of the second intermediate layer 16 is a flat surface. Here, the inclination angle of the surface 161 on the filler 8 side of the second intermediate layer 16 is larger than the inclination angle of the surface 141 on the filler 8 side of the second intermediate layer 14.
  • the first and second intermediate layers 15 and 16 are formed of the same curable resin as that of the intermediate layer 9. Therefore, the first intermediate layer 15 has translucency and a refractive index smaller than that of the first substrate 1. Similarly, the second intermediate layer 16 has translucency and a refractive index smaller than that of the second substrate 2.
  • the cross-sectional shapes of the first intermediate layer 15 and the second intermediate layer 16 in the thickness direction of the organic electroluminescent element according to this embodiment are trapezoidal as shown in FIG. And the side wall 7, the second substrate 2 and the side wall 7.
  • the first intermediate layer 15 has an inclined surface so that a portion close to the first substrate 1 is thickened
  • the second intermediate layer 16 has an inclined surface so that a portion close to the second substrate 2 is thick. Is obtained.
  • the inclination angle of the surface 151 of the first intermediate layer 15 is larger than the inclination angle of the surface 131 of the first intermediate layer 13, and the inclination angle of the surface 141 of the second intermediate layer 14 is that of the second intermediate layer 12. Since the inclination angle of the surface 121 is larger, the light emitted from the organic light emitter 6 can be extracted in the direction of the first substrate 1 and the second substrate 2 than in the case of the fourth embodiment.
  • the light emitting device (organic electroluminescent element) of the sixth embodiment is different from the light emitting device of the first embodiment in that an intermediate layer 93 is provided instead of the intermediate layer 9.
  • an intermediate layer 93 of Embodiment 6 since structures other than the intermediate
  • the intermediate layer 93 includes a first intermediate layer 17 provided on the first substrate 1 and a second intermediate layer 18 provided on the second substrate 2.
  • the first intermediate layer 17 and the second intermediate layer 18 are spaced from each other.
  • the first intermediate layer 17 has a rectangular frame shape.
  • the surface 171 on the filler 8 side of the first intermediate layer 17 is inclined so that the thickness of the first intermediate layer 17 increases from the second substrate 2 side toward the first substrate 1 side. Further, the surface 171 on the filler 8 side of the first intermediate layer 17 is a convex surface. That is, the cross section of the first intermediate layer 17 is a quarter ellipse.
  • the second intermediate layer 18 has a rectangular frame shape.
  • the surface 181 on the filler 8 side of the second intermediate layer 18 is inclined so that the thickness of the second intermediate layer 18 increases from the first substrate 1 side toward the second substrate 2 side. Further, the surface 181 on the filler 8 side of the second intermediate layer 18 is a convex surface. That is, the cross section of the second intermediate layer 18 is a quarter ellipse.
  • the first and second intermediate layers 17 and 18 are formed of the same curable resin as the intermediate layer 9. Therefore, the first intermediate layer 17 has translucency and a refractive index smaller than that of the first substrate 1. Similarly, the second intermediate layer 18 is translucent and has a refractive index smaller than that of the second substrate 2.
  • first intermediate layer 17 and the second intermediate layer 18 of the organic electroluminescent element according to the present embodiment are respectively the first substrate 1 and the side wall 7, the second substrate 2 and the side wall 7 as shown in FIG. And has a curved inclined surface.
  • the first intermediate layer 17 has an inclined surface so that the portion close to the first substrate 1 is thickened, and the second intermediate layer 18 is thick so that the portion close to the second substrate 2 is thick. Is obtained.
  • the organic light-emitting body is more effective than in the fourth and fifth embodiments.
  • the light emitted from 6 can be extracted in the direction of the first substrate 1 and the second substrate 2.
  • the first substrate 1 and the second substrate 2 may have a shape other than a square shape. Moreover, the 1st board
  • the first substrate 1 and the second substrate 2 may be plastic substrates.
  • the material of the plastic substrate is, for example, polyester, polycarbonate, polyether, polysulfone, polyethersulfone, or polyvinyl alcohol. In this case, it is preferable to provide a barrier layer for preventing permeation of moisture on the plastic substrate.
  • both the first and second substrates 1 and 2 have translucency.
  • substrate 2 does not need to have translucency.
  • the filler 8 and the intermediate layer (9, 10, 91, 92, 93) may not have translucency.
  • the organic light emitter 6 may be provided on the second substrate 2 and may be opposed to the first substrate 1 at an interval. In this case, whether or not the second substrate 2, the filler 8, and the intermediate layer (9, 10, 91, 92, 93) have translucency is determined by the light extraction direction.
  • the first electrode 3 and the second electrode 5 may be one of a reflective electrode and the other of a transparent electrode, as necessary.
  • middle layer 9 were formed with the photocurable resin, you may use a thermosetting resin as curable resin.
  • the degree of cure is determined by the remaining amount of epoxy groups after applying a predetermined amount of heat.
  • the side wall 7, the filler 8, and the intermediate layer 9 are not limited to the above example, and may be formed from an appropriate curable resin (curable resin composition).
  • curable resin composition examples include acrylic resin, phenol resin, melamine resin, epoxy resin, polyurethane, urea resin, alkyd resin, and unsaturated polyester resin.
  • the light-emitting device is opposite to the first substrate (1) having translucency and the first substrate (1).
  • the light emitting device further includes an intermediate layer (9, 10, 90, 91, 92, 93) made of a curable resin between the side wall (7) and the filler (8).
  • the intermediate layer has a lower curing degree than the filler (8).
  • the light emitting device of the second aspect according to the present invention is realized by a combination with the first aspect, and the side wall (7) is made of a curable resin.
  • the intermediate layer (9, 10, 90, 91, 92, 93) is less hardened than the side wall (7).
  • the light emitting device of the third aspect according to the present invention is realized by a combination with the first or second aspect, and the intermediate layer (9, 10) is formed from the first substrate (1) to the second one. It is provided over the substrate (2).
  • the light emitting device of the fourth aspect according to the present invention is realized by a combination with the third aspect, and the thickness of the intermediate layer (10) is the first substrate (1) and the second substrate (2).
  • the surface (100) is inclined.
  • the light emitting device according to the fifth aspect of the present invention is realized by a combination with any one of the first to fourth aspects, and the filler (8) has translucency.
  • the intermediate layers (9, 10) are translucent and have a refractive index smaller than that of the first substrate (1).
  • the light emitting device of the sixth aspect according to the present invention is realized in combination with the fifth aspect, and the second substrate (2) has translucency.
  • the intermediate layer (9, 10) has a refractive index smaller than that of the second substrate (2).
  • a light emitting device is realized by a combination with the first or second aspect, and the intermediate layer (90, 91, 92, 93) is formed on the first substrate (1).
  • the first intermediate layer (11, 13, 15, 17) and the second intermediate layer (12, 14, 16, 18) are spaced from each other.
  • the light emitting device of the eighth aspect according to the present invention is realized by a combination with the seventh aspect, and the thickness of the first intermediate layer (13, 15, 17) is from the second substrate (2) side.
  • Surfaces (131, 151, 171) on the filler (8) side of the first intermediate layer (13, 15, 17) are inclined so as to increase toward the first substrate (1) side. Yes.
  • the second intermediate layer (14) is formed such that the thickness of the second intermediate layer (14, 16, 18) increases from the first substrate (1) side toward the second substrate (2) side. , 16, 18) the surfaces (141, 161, 181) on the filler (8) side are inclined.
  • the light emitting device of the ninth aspect according to the present invention is realized by combination with the eighth aspect, and the surface (131, 151) on the filler (8) side of the first intermediate layer (13, 15).
  • Each of the surfaces (141, 161) on the filler (8) side of the second intermediate layer (14, 16) is a flat surface.
  • the light emitting device of the tenth aspect according to the present invention is realized by a combination with the eighth aspect, and the surface (171) on the filler (8) side of the first intermediate layer (17) and the second one.
  • Each of the surface (181) of the intermediate layer (18) on the filler (8) side is a convex surface.
  • the light emitting device of the eleventh aspect according to the present invention is realized by a combination with any one of the seventh to tenth aspects, and the filler (8) has translucency.
  • the first intermediate layer (11, 13, 15, 17) is translucent and has a lower refractive index than the first substrate (1).
  • the light emitting device of the twelfth aspect according to the present invention is realized by a combination with the tenth aspect, and the second substrate (2) has translucency.
  • the second intermediate layer (12, 14, 16, 18) has a refractive index smaller than that of the second substrate (2).
  • a light emitting device with improved waterproofness can be provided.
  • an organic electroluminescent element that suppresses moisture from reaching the organic light emitter as compared with the conventional case.

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Abstract

The present invention addresses the problem of providing a light emitting device the waterproofness of which is improved. This light emitting device comprises the following: a translucent first substrate (1); a second substrate (2) that faces the first substrate (1); an organic light emitting body (6) disposed between the first substrate (1) and the second substrate (2); a lateral wall (7) disposed in an outer peripheral section between the first substrate (1) and the second substrate (2); a filling material (8) that is made of a curing resin and that is filled into a space formed by the first substrate (1), the second substrate (2), the organic light emitting body (6), and the lateral wall (7); and an intermediate layer (9) formed of a hardening resin between the lateral wall (7) and the filling material (8). The degree of hardening of the intermediate layer (9) is smaller than that of the filling material (8).

Description

発光装置Light emitting device
　本発明は、発光装置に関し、特に、有機発光体を備える発光装置（有機電界発光素子）に関する。 The present invention relates to a light emitting device, and more particularly, to a light emitting device (organic electroluminescent element) including an organic light emitter.
　従来より、発光装置としては、封止構造の有機電界発光素子が知られている（日本国公開特許公報第２００７－０７３４５９号参照）。 Conventionally, an organic electroluminescent element having a sealed structure is known as a light emitting device (see Japanese Patent Publication No. 2007-073459).
　有機電界発光素子では、外部から有機電界発光素子内部へ透過した水分により、有機発光体が劣化するおそれがある。 In the organic electroluminescent element, there is a possibility that the organic luminescent material may be deteriorated by moisture that has been transmitted from the outside into the organic electroluminescent element.
　本発明は、防水性が向上した発光装置を提供する。 The present invention provides a light emitting device with improved waterproofness.
　本発明に係る一形態の発光装置は、透光性を有する第一の基板と、前記第一の基板に対向する第二の基板と、前記第一の基板と前記第二の基板との間に配置される有機発光体と、前記第一の基板と前記第二の基板との間における外周部分に設けられる側壁と、前記第一の基板、前記第二の基板、前記有機発光体、前記側壁が形成する空間に充填され、硬化性樹脂からなる充填材と、を備える。発光装置は、さらに、前記側壁と前記充填材との間に、硬化性樹脂からなる中間層を備える。前記中間層は、前記充填材よりも硬化度が小さい。 One embodiment of a light-emitting device according to the present invention includes a light-transmitting first substrate, a second substrate facing the first substrate, and between the first substrate and the second substrate. An organic light emitter disposed on a side wall provided on an outer peripheral portion between the first substrate and the second substrate; the first substrate; the second substrate; the organic light emitter; A filler formed of a curable resin and filled in a space formed by the side wall. The light emitting device further includes an intermediate layer made of a curable resin between the side wall and the filler. The intermediate layer has a lower degree of curing than the filler.
実施形態１に係る有機電界発光素子の厚さ方向断面図である。1 is a thickness direction cross-sectional view of an organic electroluminescent element according to Embodiment 1. FIG. 実施形態１に係る有機電界発光素子の平面図である。1 is a plan view of an organic electroluminescent element according to Embodiment 1. FIG. 実施形態２に係る有機電界発光素子の厚さ方向断面図である。5 is a cross-sectional view in the thickness direction of an organic electroluminescent element according to Embodiment 2. FIG. 実施形態３に係る有機電界発光素子の厚さ方向断面図である。5 is a cross-sectional view in the thickness direction of an organic electroluminescent element according to Embodiment 3. FIG. 実施形態４に係る有機電界発光素子の厚さ方向断面図である。6 is a cross-sectional view in the thickness direction of an organic electroluminescent element according to Embodiment 4. FIG. 実施形態５に係る有機電界発光素子の厚さ方向断面図である。7 is a cross-sectional view in the thickness direction of an organic electroluminescent element according to Embodiment 5. 実施形態６に係る有機電界発光素子の厚さ方向断面図である。7 is a cross-sectional view in the thickness direction of an organic electroluminescent element according to Embodiment 6.
　以下の実施形態で示す発光装置は、有機発光体を備える有機電界発光素子である。各実施形態の発光装置は、透光性を有し、互いに対向する第一の基板１及び第二の基板２と、第一の基板１と第二の基板２の間において、第一の基板１上に設けられ、第二の基板２と間隔をおいて対向する有機発光体６と、第一の基板１及び第二の基板２間の外周部分に設けられ、硬化性樹脂からなる側壁７と、第一の基板１、第二の基板２、有機発光体６、側壁７が形成する空間に充填され、硬化性樹脂からなる充填材８を有する。 The light-emitting device shown in the following embodiments is an organic electroluminescent element including an organic light emitter. The light-emitting device of each embodiment has translucency and is the 1st board | substrate between the 1st board | substrate 1 and the 2nd board | substrate 2 which mutually oppose, and the 1st board | substrate 1 and the 2nd board | substrate 2. The organic light-emitting body 6 provided on 1 and opposed to the second substrate 2 with a space therebetween, and the side wall 7 made of a curable resin, provided on the outer peripheral portion between the first substrate 1 and the second substrate 2. And the first substrate 1, the second substrate 2, the organic light emitting body 6, and the side wall 7 are filled with a filler 8 made of a curable resin.
　有機発光体６は、第一の基板１側から順に、第一の電極３、有機発光層４、第二の電極５が積層されてなる。 The organic light-emitting body 6 is formed by laminating a first electrode 3, an organic light-emitting layer 4, and a second electrode 5 in order from the first substrate 1 side.
　（実施形態１）
　実施形態１に係る有機電界発光素子は、図１のように、側壁７と充填材８の間に、第一の基板１から第二の基板２にかけて設けられた、有機電界発光素子の厚さ方向における断面が長方形状の中間層９を有する。側壁７と充填材８はそれぞれ光硬化性樹脂により形成される。中間層９は側壁７として用いられる光硬化性樹脂及び充填材８として用いられる光硬化性樹脂よりも硬化度が小さく、かつ第一の基板１及び第二の基板２よりも光の屈折率が小さい光硬化性樹脂によって形成される。側壁７として用いられる光硬化性樹脂及び充填材８として用いられる光硬化性樹脂の硬化度は特に限定されない。ここで、光硬化性樹脂を用いた場合の硬化度とは、所定量のＵＶ光を照射した後における、エポキシ基の残量によって定められる。 (Embodiment 1)
As shown in FIG. 1, the organic electroluminescent element according to Embodiment 1 is the thickness of the organic electroluminescent element provided between the first substrate 1 and the second substrate 2 between the sidewall 7 and the filler 8. The intermediate layer 9 has a rectangular cross section in the direction. The side wall 7 and the filler 8 are each formed of a photocurable resin. The intermediate layer 9 has a lower degree of curing than the photocurable resin used as the side wall 7 and the photocurable resin used as the filler 8, and has a light refractive index higher than that of the first substrate 1 and the second substrate 2. It is formed by a small photocurable resin. The degree of cure of the photocurable resin used as the side wall 7 and the photocurable resin used as the filler 8 is not particularly limited. Here, the degree of cure in the case of using a photocurable resin is determined by the remaining amount of epoxy groups after irradiation with a predetermined amount of UV light.
　以下、実施形態１の発光装置についてより詳細に説明する。図１及び図２に示すように、実施形態１に係る発光装置は、第一の基板１と、第二の基板２と、有機発光体６と、側壁７と、充填材８と、を有する。 Hereinafter, the light emitting device of Embodiment 1 will be described in more detail. As shown in FIGS. 1 and 2, the light emitting device according to the first embodiment includes a first substrate 1, a second substrate 2, an organic light emitter 6, a side wall 7, and a filler 8. .
　第一の基板１及び第二の基板２は、所定の間隔を空けて互いに対向するように配置される。第一の基板１及び第二の基板２は、矩形状であり、同じ大きさを有している。第一の基板１及び第二の基板２は、透光性を有する。第一の基板１及び第二の基板２は、例えば、ガラス基板である。ガラス基板の材料は、例えば、アルカリガラス、無アルカリガラス、石英ガラスなどの無機ガラスである。 The first substrate 1 and the second substrate 2 are arranged to face each other with a predetermined interval. The first substrate 1 and the second substrate 2 are rectangular and have the same size. The first substrate 1 and the second substrate 2 have translucency. The first substrate 1 and the second substrate 2 are, for example, glass substrates. The material of the glass substrate is, for example, inorganic glass such as alkali glass, non-alkali glass, or quartz glass.
　有機発光体６は、第一の基板１と第二の基板２の間において、第一の基板１上に設けられ、第二の基板２と間隔をおいて対向する。有機発光体６は、第一の基板１の中央に配置される。有機発光体６は、第一の基板１側から順に、第一の電極３、有機発光層４、第二の電極５が積層されてなる。また、第一の電極３及び第二の電極５は、透光性を有する。 The organic light emitter 6 is provided on the first substrate 1 between the first substrate 1 and the second substrate 2 and faces the second substrate 2 with a gap. The organic light emitter 6 is disposed in the center of the first substrate 1. The organic light emitter 6 is formed by laminating a first electrode 3, an organic light emitting layer 4, and a second electrode 5 in order from the first substrate 1 side. Moreover, the 1st electrode 3 and the 2nd electrode 5 have translucency.
　側壁７は、第一の基板１及び第二の基板２の外周部分に設けられる。側壁７は、第一の基板１と第二の基板２とが対向する方向（図１における上下方向、つまり、発光装置の厚み方向）に直交する平面において、有機発光体６を、囲うように形成される。側壁７は、矩形枠状である。 The side wall 7 is provided on the outer peripheral portion of the first substrate 1 and the second substrate 2. The side wall 7 surrounds the organic light emitter 6 in a plane orthogonal to the direction in which the first substrate 1 and the second substrate 2 face each other (vertical direction in FIG. 1, ie, the thickness direction of the light emitting device). It is formed. The side wall 7 has a rectangular frame shape.
　充填材８は、第一の基板１、第二の基板２、有機発光体６、側壁７が形成する空間に充填される。つまり、充填材８は、第一の基板１、第二の基板２、及び、側壁７で囲まれた領域内で、有機発光体６を封止する。また、充填材８は、透光性を有する。 The filler 8 is filled in the space formed by the first substrate 1, the second substrate 2, the organic light emitter 6, and the side wall 7. That is, the filler 8 seals the organic light-emitting body 6 in a region surrounded by the first substrate 1, the second substrate 2, and the side wall 7. Moreover, the filler 8 has translucency.
　中間層９は、側壁７と充填材８との間に形成される。中間層９は、第一の基板１から第二の基板２にかけて設けられている。つまり、中間層９は、矩形枠状である。中間層９は、透光性を有し、また、第一の基板１及び第二の基板２より小さい屈折率を有する。 The intermediate layer 9 is formed between the side wall 7 and the filler 8. The intermediate layer 9 is provided from the first substrate 1 to the second substrate 2. That is, the intermediate layer 9 has a rectangular frame shape. The intermediate layer 9 has translucency and has a refractive index smaller than that of the first substrate 1 and the second substrate 2.
　側壁７と、充填材８と、中間層９とは、硬化性樹脂、特に、光硬化性樹脂で形成される。側壁７と、充填材８と、中間層９とは、互いに異なる硬化性樹脂で形成される。以下、必要に応じて、側壁７の硬化性樹脂を第一の硬化性樹脂、充填材８の硬化性樹脂を第二の硬化性樹脂、中間層９の硬化性樹脂を第三の硬化性樹脂という。 The side wall 7, the filler 8, and the intermediate layer 9 are formed of a curable resin, in particular, a photocurable resin. The side wall 7, the filler 8, and the intermediate layer 9 are formed of different curable resins. Hereinafter, if necessary, the curable resin of the side wall 7 is the first curable resin, the curable resin of the filler 8 is the second curable resin, and the curable resin of the intermediate layer 9 is the third curable resin. That's it.
　第一～第三の硬化性樹脂として使用される硬化性樹脂（硬化性樹脂組成物）は、所定の硬化条件に対して、硬化度が硬化性樹脂の硬さの指標となるように選択される。つまり、硬化度は、所定の硬化条件で硬化性樹脂を硬化させた直後の硬化性樹脂の硬さを示す。なお、硬化性樹脂が光硬化性樹脂である場合、所定の硬化条件は、たとえば、所定量のＵＶ光を照射することである。 The curable resin (curable resin composition) used as the first to third curable resins is selected so that the degree of cure is an index of the hardness of the curable resin with respect to predetermined curing conditions. The That is, the degree of cure indicates the hardness of the curable resin immediately after the curable resin is cured under predetermined curing conditions. When the curable resin is a photocurable resin, the predetermined curing condition is, for example, irradiation with a predetermined amount of UV light.
　たとえば、硬化性樹脂は、エポキシ基を含む樹脂と、エポキシ基と結合する硬化剤と、を含む。このような硬化性樹脂では、硬化が進むほど、エポキシ基の量及び硬化剤の量が減少する。そのため、硬化性樹脂の硬化度は、所定の硬化条件で硬化性樹脂を硬化させた直後のエポキシ基の残量によって定められる。つまり、エポキシ基の残量が多いほど硬化度が低く、エポキシ基の残量が少ないほど硬化度が高い。同様に、硬化剤の残量が多いほど硬化度が低く、硬化剤の残量が少ないほど硬化度が高い。 For example, the curable resin includes a resin containing an epoxy group and a curing agent that binds to the epoxy group. In such a curable resin, the amount of epoxy group and the amount of curing agent decrease as the curing proceeds. Therefore, the degree of cure of the curable resin is determined by the remaining amount of epoxy groups immediately after the curable resin is cured under predetermined curing conditions. That is, the higher the remaining amount of epoxy groups, the lower the degree of curing, and the lower the remaining amount of epoxy groups, the higher the degree of curing. Similarly, the greater the remaining amount of the curing agent, the lower the curing degree, and the smaller the remaining amount of the curing agent, the higher the curing degree.
　有機発光体６を充填材８で封止するのに要する時間（例えば数分）では、硬化性樹脂の硬化度は硬化性樹脂の硬さに直結する。硬化性樹脂の硬さから硬化度を評価できる。つまり、側壁７、充填材８、及び中間層９の硬さから、第一の硬化性樹脂、第二の硬化性樹脂、及び第三の硬化性樹脂の硬化度を比較できる。たとえば、硬化性樹脂が硬ければ、硬化性樹脂の硬化度が大きいということである。 In the time required for sealing the organic light emitter 6 with the filler 8 (for example, several minutes), the degree of cure of the curable resin is directly linked to the hardness of the curable resin. The degree of cure can be evaluated from the hardness of the curable resin. That is, the degree of cure of the first curable resin, the second curable resin, and the third curable resin can be compared from the hardness of the side wall 7, the filler 8, and the intermediate layer 9. For example, if the curable resin is hard, the degree of cure of the curable resin is large.
　有機発光体６を充填材８で封止してから（あるいは発光装置が製造されてから）十分な時間（実際に、発光装置が販売や使用されるのにかかる時間）が経過すると、硬化性樹脂の硬さは変化しなくなる。そのため、硬化度（エポキシ基の残量）と硬化性樹脂の硬さとの間の相関がなくなる。そのため、硬化性樹脂の硬さから硬化度を評価することが難しくなる。ただし、硬化性樹脂に含まれる硬化剤の残量と硬化度との相関は維持されているため、硬化剤の残量から硬化性樹脂の硬化度を評価できる。つまり、側壁７、充填材８、及び中間層９に含まれる硬化剤の残量から、第一の硬化性樹脂、第二の硬化性樹脂、及び第三の硬化性樹脂の硬化度を比較できる。 When sufficient time (actually, the time taken for the light emitting device to be sold or used) elapses after the organic light emitting body 6 is sealed with the filler 8 (or after the light emitting device is manufactured), the curability is increased. The hardness of the resin will not change. Therefore, there is no correlation between the degree of cure (remaining amount of epoxy group) and the hardness of the curable resin. Therefore, it becomes difficult to evaluate the degree of curing from the hardness of the curable resin. However, since the correlation between the remaining amount of the curing agent contained in the curable resin and the degree of curing is maintained, the degree of curing of the curable resin can be evaluated from the remaining amount of the curing agent. That is, the degree of cure of the first curable resin, the second curable resin, and the third curable resin can be compared from the remaining amount of the curing agent contained in the side wall 7, the filler 8, and the intermediate layer 9. .
　第三の硬化性樹脂は、硬化度が、第一の硬化性樹脂及び第二の硬化性樹脂よりも小さい（中間層９は、硬化度が、側壁７及び充填材８よりも小さい）。これは、硬化後には、第三の硬化性樹脂よりも、第一の硬化性樹脂及び第二の硬化性樹脂のほうが硬いことを意味する。例えば、第一～第三の硬化性樹脂は、硬化度が６０％以上であることが好ましい。そして、第三の硬化性樹脂は、硬化度が７５％未満であり、第一及び第二の硬化性樹脂は、硬化度が７５％以上であることが好ましい。 The third curable resin has a smaller degree of curing than the first curable resin and the second curable resin (the intermediate layer 9 has a smaller degree of curing than the side wall 7 and the filler 8). This means that after curing, the first curable resin and the second curable resin are harder than the third curable resin. For example, the first to third curable resins preferably have a curing degree of 60% or more. The third curable resin preferably has a degree of cure of less than 75%, and the first and second curable resins preferably have a degree of cure of 75% or more.
　なお、硬化前の第一～第三の硬化性樹脂の粘性は、発光装置の製造が容易に行えるように適宜調整される。例えば、第一の硬化性樹脂は、側壁７の材料として所定位置にとどまることができるように、比較的大きい粘性を有することが好ましい。同様に、第三の硬化性樹脂は、中間層９の材料として所定位置にとどまることができるように、比較的大きい粘性を有することが好ましい。一方、第二の硬化性樹脂は、第一の基板１、第二の基板２、有機発光体６、側壁７が形成する空間を十分に充填できるように、比較的低い粘性を有することが好ましい。また、硬化前の第一～第三の硬化性樹脂は、互いに混合されないことが好ましい。 It should be noted that the viscosity of the first to third curable resins before curing is appropriately adjusted so that the light emitting device can be easily manufactured. For example, the first curable resin preferably has a relatively large viscosity so that it can remain in a predetermined position as the material of the side wall 7. Similarly, the third curable resin preferably has a relatively large viscosity so that it can remain in place as the material of the intermediate layer 9. On the other hand, the second curable resin preferably has a relatively low viscosity so that the space formed by the first substrate 1, the second substrate 2, the organic light emitter 6, and the side wall 7 can be sufficiently filled. . The first to third curable resins before curing are preferably not mixed with each other.
　実施形態１の発光装置は、例えば、次のようにして製造される。まず、第一の基板１上に、有機発光体６を形成する。また、第一の基板１上に側壁７用の第一の硬化性樹脂及び中間層９用の第三の硬化性樹脂を塗布する。次に、充填材８用の第二の硬化性樹脂を、側壁７で囲まれる空間に入れ、第二の基板２を第一の基板１上に配置する。次に、所定量のＵＶ光を照射して、第一～第三の硬化性樹脂を硬化させて側壁７、充填材８、及び中間層９を形成して、第一の基板１と第二の基板２とを接合する。このとき、第三の硬化性樹脂の硬化度が第一及び第二の硬化性樹脂の硬化度より小さいから、硬化による第一及び第二の硬化性樹脂の形状の変化に応じて中間層９となる第三の硬化性樹脂が変形する。そのため、側壁７（第一の硬化性樹脂）と充填材８（第二の硬化性樹脂）との間に隙間が生じることを抑制できる。 The light-emitting device of Embodiment 1 is manufactured as follows, for example. First, the organic light emitter 6 is formed on the first substrate 1. Further, the first curable resin for the side wall 7 and the third curable resin for the intermediate layer 9 are applied on the first substrate 1. Next, the second curable resin for the filler 8 is put in the space surrounded by the side wall 7, and the second substrate 2 is placed on the first substrate 1. Next, a predetermined amount of UV light is irradiated to cure the first to third curable resins to form the side wall 7, the filler 8, and the intermediate layer 9. The substrate 2 is bonded. At this time, since the degree of cure of the third curable resin is smaller than the degree of cure of the first and second curable resins, the intermediate layer 9 according to the change in the shape of the first and second curable resins due to curing. The third curable resin becomes. Therefore, it can suppress that a clearance gap produces between the side wall 7 (1st curable resin) and the filler 8 (2nd curable resin).
　以上の工程を経て、図１及び図２に示す実施形態１の発光装置が得られる。 Through the above steps, the light emitting device of Embodiment 1 shown in FIGS. 1 and 2 is obtained.
　ここで、第一の基板１と第二の基板２との間の距離（ギャップ）は、素子部分の厚み（有機発光体６を構成する層の厚みの合計）より大きいことが最低限必要である。ただし、充填材８に粒子が含まれる場合や製造時に発生するパーティクルによる信頼性不良を起こさないためには、第一の基板１と第二の基板２との間の距離が、１０μｍ以上であることが好ましい。 Here, the distance (gap) between the first substrate 1 and the second substrate 2 must be at least larger than the thickness of the element portion (the total thickness of the layers constituting the organic light-emitting body 6). is there. However, the distance between the first substrate 1 and the second substrate 2 is 10 μm or more in order not to cause a reliability failure due to particles generated in the filling material 8 or particles generated during manufacturing. It is preferable.
　側壁７の厚みは０．７ｍｍ～１．５ｍｍが好ましい。側壁７の厚みは、側壁７の外面（有機発光体６とは反対側の面）と内面（有機発光体６側を向いた面）との間の寸法である。中間層９の厚みは、側壁７の厚みの２０分の１以上２分の１以下が好ましい。特に、中間層９の厚みは、５０μｍ～７００μｍであることが好ましい。中間層９の厚みは、中間層９の外面（有機発光体６とは反対側の面）と内面（有機発光体６側を向いた面）との間の寸法である。 The thickness of the side wall 7 is preferably 0.7 mm to 1.5 mm. The thickness of the side wall 7 is a dimension between the outer surface (surface opposite to the organic light emitter 6) and the inner surface (surface facing the organic light emitter 6 side) of the side wall 7. The thickness of the intermediate layer 9 is preferably 1/20 or less and 1/2 or less of the thickness of the side wall 7. In particular, the thickness of the intermediate layer 9 is preferably 50 μm to 700 μm. The thickness of the intermediate layer 9 is a dimension between the outer surface (surface opposite to the organic light emitter 6) and the inner surface (surface facing the organic light emitter 6) of the intermediate layer 9.
　水分は、側壁７と第一の基板１又は第二の基板２との界面を透過しやすい。中間層９が存在しない場合、界面近傍において側壁７と充填材８との間に生じる間隙は、側壁７が厚いほど小さくなる。特に、側壁７の厚みが２０００μｍ以上になると間隙がほとんど生じない。 Water easily passes through the interface between the side wall 7 and the first substrate 1 or the second substrate 2. When the intermediate layer 9 is not present, the gap generated between the side wall 7 and the filler 8 near the interface becomes smaller as the side wall 7 is thicker. In particular, when the thickness of the sidewall 7 is 2000 μm or more, almost no gap is generated.
　一方、中間層９が存在する場合、側壁７と中間層９の厚みの合計が１０００μｍ以上になると間隙がほとんど生じなくなる。そのため、中間層９を設けることによって、有機発光体６が収納される空間を囲う枠の厚み（中間層９が存在しない場合は側壁７の厚みであり、中間層９が存在する場合は側壁７と中間層９との厚みの合計）を小さくできる。 On the other hand, when the intermediate layer 9 is present, the gap hardly occurs when the total thickness of the side wall 7 and the intermediate layer 9 is 1000 μm or more. Therefore, by providing the intermediate layer 9, the thickness of the frame surrounding the space in which the organic light emitter 6 is accommodated (the thickness of the side wall 7 when the intermediate layer 9 is not present, and the side wall 7 when the intermediate layer 9 is present). And the total thickness of the intermediate layer 9) can be reduced.
　以上述べたように、実施形態１に係る発光装置は、透光性を有し、互いに対向する第一の基板１及び第二の基板２と、前記第一の基板１と前記第二の基板２との間において、前記第一の基板１上に設けられ、前記第二の基板２と間隔をおいて対向する有機発光体６と、前記第一の基板１と前記第二の基板２との間における外周部分に設けられ、硬化性樹脂からなる側壁７と、前記第一の基板１、前記第二の基板２、前記有機発光体６、前記側壁７が形成する空間に充填され、硬化性樹脂からなる充填材８と、を備える。また、実施形態１に係る発光装置は、前記側壁７と前記充填材８との間に、前記側壁７及び前記充填材８よりも硬化度が小さい硬化性樹脂からなる中間層９を有する。 As described above, the light-emitting device according to Embodiment 1 has a light-transmitting property, and the first substrate 1 and the second substrate 2 facing each other, and the first substrate 1 and the second substrate. 2, an organic light-emitting body 6 provided on the first substrate 1 and facing the second substrate 2 with a space therebetween, the first substrate 1 and the second substrate 2. Between the side wall 7 made of a curable resin, the first substrate 1, the second substrate 2, the organic light-emitting body 6, and the side wall 7 to be filled and cured. And a filler 8 made of a functional resin. In addition, the light emitting device according to Embodiment 1 includes an intermediate layer 9 made of a curable resin having a lower degree of curing than the side wall 7 and the filler 8 between the side wall 7 and the filler 8.
　このような構成とすることにより、側壁７、充填材８、中間層９を光照射により硬化させる際に、光硬化性樹脂の硬化度の違いに起因して側壁７と充填材８との間に隙間が生じることを抑制できる。そして、これにより、水分が側壁７を透過した場合や、第一の基板１及び第二の基板２と側壁７の界面を透過した場合に、有機発光体６まで水分が到達することを抑制でき、有機電界発光素子の劣化を抑制することができる。 With such a configuration, when the side wall 7, the filler 8, and the intermediate layer 9 are cured by light irradiation, due to the difference in the degree of curing of the photocurable resin, between the side wall 7 and the filler 8. It can suppress that a clearance gap arises in the. And it can suppress that a water | moisture content reaches | attains the organic light-emitting body 6 when this permeate | transmits the side wall 7 or this permeate | transmits the interface of the 1st board | substrate 1, the 2nd board | substrate 2, and the side wall 7. Deterioration of the organic electroluminescent element can be suppressed.
　（実施形態２）
　図３に示すように、実施形態２の発光装置（有機電界発光素子）は、中間層９の代わりに中間層１０を備える点で、実施形態１の発光装置と異なる。なお、実施形態２の中間層９以外の構成は、実施形態１と同じであるから、実施形態１と同じ符号を付して説明を省略する。 (Embodiment 2)
As shown in FIG. 3, the light emitting device (organic electroluminescent element) of the second embodiment is different from the light emitting device of the first embodiment in that an intermediate layer 10 is provided instead of the intermediate layer 9. In addition, since structures other than the intermediate | middle layer 9 of Embodiment 2 are the same as Embodiment 1, the same code | symbol as Embodiment 1 is attached | subjected and description is abbreviate | omitted.
　実施形態２に係る有機電界発光素子は、図３のように、側壁７と充填材８の間に、中間層１０を有する。中間層１０は側壁７として用いられる光硬化性樹脂及び充填材８として用いられる光硬化性樹脂よりも硬化度が小さく、かつ第一の基板１及び第二の基板２よりも光の屈折率が小さい光硬化性樹脂によって形成される。 The organic electroluminescent element according to Embodiment 2 has an intermediate layer 10 between the side wall 7 and the filler 8 as shown in FIG. The intermediate layer 10 has a lower degree of curing than the photocurable resin used as the side wall 7 and the photocurable resin used as the filler 8, and has a light refractive index that is higher than that of the first substrate 1 and the second substrate 2. It is formed by a small photocurable resin.
　中間層１０は、第一の基板１から第二の基板２にかけて設けられ、厚みが前記第一の基板１及び前記第二の基板２に接する部分で最も厚くなるよう、傾斜面１００を有する。有機電界発光素子の厚さ方向における中間層１０の断面形状は長方形の一辺が凹状に湾曲した形状である。換言すれば、中間層１０の厚みが第一の基板１と第二の基板２との間の部分から第一の基板１に接する部分及び第二の基板２に接する部分に向かうにつれて大きくなるよう、中間層１０の充填材側の面１００が傾斜している。つまり、中間層１０は、内面（充填材８と対向する面）１００が凹面となるように形成されている。なお、中間層１０は、中間層９と同じ硬化性樹脂で形成される。 The intermediate layer 10 is provided from the first substrate 1 to the second substrate 2, and has an inclined surface 100 so that the thickness becomes the thickest at the portion in contact with the first substrate 1 and the second substrate 2. The cross-sectional shape of the intermediate layer 10 in the thickness direction of the organic electroluminescent element is a shape in which one side of the rectangle is curved in a concave shape. In other words, the thickness of the intermediate layer 10 increases from the portion between the first substrate 1 and the second substrate 2 toward the portion in contact with the first substrate 1 and the portion in contact with the second substrate 2. The surface 100 on the filler side of the intermediate layer 10 is inclined. That is, the intermediate layer 10 is formed such that the inner surface (surface facing the filler 8) 100 is a concave surface. The intermediate layer 10 is formed of the same curable resin as that of the intermediate layer 9.
　第一の基板１及び第二の基板２と側壁７の界面を透過する水分の量は、側壁７を透過する水分の量よりも多い。よって、第一の基板１及び第二の基板２に近い部分で中間層１０を厚くすることにより、有機発光体６まで水分が到達することを効率よく抑制できる。 The amount of moisture that permeates the interface between the first substrate 1 and the second substrate 2 and the side wall 7 is larger than the amount of moisture that permeates the side wall 7. Therefore, by increasing the thickness of the intermediate layer 10 near the first substrate 1 and the second substrate 2, it is possible to efficiently suppress moisture from reaching the organic light emitter 6.
　また、このような構成とすることにより、有機発光体６から放射された光が中間層１０の傾斜面により第一の基板１及び第二の基板２の方向へ屈折され、光を効率よく第一の基板１及び第二の基板２から引き出すことができる。 Further, with such a configuration, the light emitted from the organic light emitter 6 is refracted in the direction of the first substrate 1 and the second substrate 2 by the inclined surface of the intermediate layer 10, and the light is efficiently reflected. It can be pulled out from one substrate 1 and the second substrate 2.
　（実施形態３）
　図４に示すように、実施形態３の発光装置（有機電界発光素子）は、中間層９の代わりに中間層９０を備える点で、実施形態１の発光装置と異なる。なお、実施形態３の中間層９０以外の構成は、実施形態１と同じであるから、実施形態１と同じ符号を付して説明を省略する。 (Embodiment 3)
As shown in FIG. 4, the light emitting device (organic electroluminescent element) of the third embodiment is different from the light emitting device of the first embodiment in that an intermediate layer 90 is provided instead of the intermediate layer 9. In addition, since structures other than the intermediate | middle layer 90 of Embodiment 3 are the same as Embodiment 1, the same code | symbol as Embodiment 1 is attached | subjected and description is abbreviate | omitted.
　中間層９０は、第一の基板１上に設けられる第一の中間層１１と、第二の基板２上に設けられる第二の中間層１２と、を有する。第一の中間層１１と第二の中間層１２とは（発光装置の厚み方向において）相互に間隔をおいて設けられている。 The intermediate layer 90 includes a first intermediate layer 11 provided on the first substrate 1 and a second intermediate layer 12 provided on the second substrate 2. The first intermediate layer 11 and the second intermediate layer 12 are spaced from each other (in the thickness direction of the light emitting device).
　第一の中間層１１と第二の中間層１２は、いずれも矩形枠状であり、その断面は長方形状である。また、第一及び第二の中間層１１，１２は、中間層９と同じ硬化性樹脂で形成される。したがって、第一の中間層１１は、透光性を有し、第一の基板１よりも屈折率が小さい。同様に、第二の中間層１２は、透光性を有し、第二の基板２よりも屈折率が小さい。 The first intermediate layer 11 and the second intermediate layer 12 both have a rectangular frame shape, and the cross section thereof is a rectangular shape. The first and second intermediate layers 11 and 12 are formed of the same curable resin as the intermediate layer 9. Therefore, the first intermediate layer 11 has translucency and a refractive index smaller than that of the first substrate 1. Similarly, the second intermediate layer 12 has translucency and a refractive index smaller than that of the second substrate 2.
　このように、実施形態３に係る有機電界発光素子は、図４のように、側壁７と充填材８の間に、第一の基板１側と第二の基板２側とに相互に間隔をおいて設けられた、第一の中間層１１及び第二の中間層１２を有する。第一の中間層１１は第一の基板１に、第二の中間層１２は第二の基板２にそれぞれ設けられている。有機電界発光素子の厚さ方向における第一の中間層１１及び第二の中間層１２の断面形状は長方形である。第一の中間層１１及び第二の中間層１２は側壁７として用いられる光硬化性樹脂及び充填材８として用いられる光硬化性樹脂よりも硬化度が小さく、かつ第一の基板１及び第二の基板２よりも光の屈折率が小さい光硬化性樹脂によって形成される。 As described above, the organic electroluminescent element according to Embodiment 3 is spaced from the side wall 7 and the filler 8 between the first substrate 1 side and the second substrate 2 side as shown in FIG. The first intermediate layer 11 and the second intermediate layer 12 are provided. The first intermediate layer 11 is provided on the first substrate 1, and the second intermediate layer 12 is provided on the second substrate 2. The cross-sectional shapes of the first intermediate layer 11 and the second intermediate layer 12 in the thickness direction of the organic electroluminescent element are rectangular. The first intermediate layer 11 and the second intermediate layer 12 have a lower degree of curing than the photocurable resin used as the side wall 7 and the photocurable resin used as the filler 8, and the first substrate 1 and the second intermediate layer 12. It is made of a photocurable resin having a light refractive index smaller than that of the substrate 2.
　実施形態３の発光装置は、例えば、次のようにして製造される。まず、第一の基板１上に、有機発光体６を形成する。また、第一の基板１上に側壁７用の第一の硬化性樹脂及び第一の中間層１１用の第三の硬化性樹脂を塗布し、第二の基板２上に第二の中間層１２用の第三の硬化性樹脂を塗布する。次に、充填材８用の第二の硬化性樹脂を、側壁７で囲まれる空間に入れ、第二の基板２を第一の基板１上に配置する。次に、所定量のＵＶ光を照射して、第一～第三の硬化性樹脂を硬化させて側壁７、充填材８、第一及び第二の中間層１１，１２を形成し、第一の基板１と第二の基板２とを接合する。このとき、第三の硬化性樹脂の硬化度が第一及び第二の硬化性樹脂の硬化度より小さいから、硬化による第一及び第二の硬化性樹脂の形状の変化に応じて、第一及び第二の中間層１１，１２となる第三の硬化性樹脂が変形する。そのため、側壁７（第一の硬化性樹脂）と充填材８（第二の硬化性樹脂）との間に隙間が生じることを抑制できる。 The light emitting device of Embodiment 3 is manufactured as follows, for example. First, the organic light emitter 6 is formed on the first substrate 1. Further, the first curable resin for the side wall 7 and the third curable resin for the first intermediate layer 11 are applied on the first substrate 1, and the second intermediate layer is applied on the second substrate 2. A third curable resin for 12 is applied. Next, the second curable resin for the filler 8 is put in the space surrounded by the side wall 7, and the second substrate 2 is placed on the first substrate 1. Next, a predetermined amount of UV light is irradiated to cure the first to third curable resins to form the side wall 7, the filler 8, and the first and second intermediate layers 11 and 12. The substrate 1 and the second substrate 2 are joined. At this time, the degree of cure of the third curable resin is smaller than the degree of cure of the first and second curable resins. And the 3rd curable resin used as the 2nd intermediate | middle layers 11 and 12 deform | transforms. Therefore, it can suppress that a clearance gap produces between the side wall 7 (1st curable resin) and the filler 8 (2nd curable resin).
　ここで、第一の基板１と第二の基板２との間の距離（ギャップ）は、第一及び第二の中間層１１，１２を設けるために、５０μｍ以上であることが好ましい。第一及び第二の中間層１１，１２の高さ（図３における上下方向の寸法）は、ギャップの約３分の１以下であることが好ましい。また、第一及び第二の中間層１１，１２のアスペクト比（つまり、高さに対する厚みの比）は２：１であることが好ましい。 Here, the distance (gap) between the first substrate 1 and the second substrate 2 is preferably 50 μm or more in order to provide the first and second intermediate layers 11 and 12. The height of the first and second intermediate layers 11 and 12 (the vertical dimension in FIG. 3) is preferably about one third or less of the gap. The aspect ratio of the first and second intermediate layers 11 and 12 (that is, the ratio of thickness to height) is preferably 2: 1.
　本実施形態に係る有機電界発光素子は、少ない樹脂量で中間層（第一及び第二の中間層１１，１２）を形成し、透過する水分の量が他の部分に比べて多い第一の基板１及び第二の基板２と側壁７の界面付近で、側壁７と充填材８の間に隙間が生じることを抑制できる。 The organic electroluminescent element according to the present embodiment forms the intermediate layer (first and second intermediate layers 11 and 12) with a small amount of resin, and the amount of moisture to be transmitted is larger than that of the other portions. It is possible to suppress the generation of a gap between the side wall 7 and the filler 8 in the vicinity of the interface between the substrate 1 and the second substrate 2 and the side wall 7.
　（実施形態４）
　図５に示すように、実施形態４の発光装置（有機電界発光素子）は、中間層９の代わりに中間層９１を備える点で、実施形態１の発光装置と異なる。なお、実施形態４の中間層９１以外の構成は、実施形態１と同じであるから、実施形態１と同じ符号を付して説明を省略する。 (Embodiment 4)
As shown in FIG. 5, the light emitting device (organic electroluminescent element) of the fourth embodiment is different from the light emitting device of the first embodiment in that an intermediate layer 91 is provided instead of the intermediate layer 9. In addition, since structures other than the intermediate | middle layer 91 of Embodiment 4 are the same as Embodiment 1, the same code | symbol as Embodiment 1 is attached | subjected and description is abbreviate | omitted.
　中間層９１は、第一の基板１上に設けられる第一の中間層１３と、第二の基板２上に設けられる第二の中間層１４と、を有する。第一の中間層１３と第二の中間層１４とは（発光装置の厚み方向において）相互に間隔をおいて設けられている。 The intermediate layer 91 includes a first intermediate layer 13 provided on the first substrate 1 and a second intermediate layer 14 provided on the second substrate 2. The first intermediate layer 13 and the second intermediate layer 14 are spaced from each other (in the thickness direction of the light emitting device).
　第一の中間層１３は、矩形枠状であり、その断面は直角三角形状である。したがって、第一の中間層１３の厚みが第二の基板２側から第一の基板１側に向かうにつれて大きくなるよう、第一の中間層１３の充填材８側の面１３１が傾斜している。また、第一の中間層１３の充填材８側の面１３１は、平面である。 The first intermediate layer 13 has a rectangular frame shape, and its cross section has a right triangle shape. Therefore, the surface 131 on the filler 8 side of the first intermediate layer 13 is inclined so that the thickness of the first intermediate layer 13 increases from the second substrate 2 side toward the first substrate 1 side. . Further, the surface 131 on the filler 8 side of the first intermediate layer 13 is a flat surface.
　第二の中間層１４は、矩形枠状であり、その断面は直角三角形状である。したがって、第二の中間層１４の厚みが第一の基板１側から第二の基板２側に向かうにつれて大きくなるよう、第二の中間層１４の充填材８側の面１４１が傾斜している。また、第二の中間層１４の充填材８側の面１４１は、平面である。 The second intermediate layer 14 has a rectangular frame shape, and its cross section has a right triangle shape. Therefore, the surface 141 on the filler 8 side of the second intermediate layer 14 is inclined so that the thickness of the second intermediate layer 14 increases from the first substrate 1 side toward the second substrate 2 side. . Further, the surface 141 on the filler 8 side of the second intermediate layer 14 is a flat surface.
　また、第一及び第二の中間層１３，１４は、中間層９と同じ硬化性樹脂で形成される。したがって、第一の中間層１３は、透光性を有し、第一の基板１よりも屈折率が小さい。同様に、第二の中間層１４は、透光性を有し、第二の基板２よりも屈折率が小さい。 The first and second intermediate layers 13 and 14 are formed of the same curable resin as that of the intermediate layer 9. Therefore, the first intermediate layer 13 has translucency and a refractive index smaller than that of the first substrate 1. Similarly, the second intermediate layer 14 is translucent and has a lower refractive index than the second substrate 2.
　このように、実施形態４に係る有機電界発光素子は、図５のように、側壁７と充填材８の間に、第一の基板１側と第二の基板２側とに相互に間隔をおいて設けられた、第一の中間層１３及び第二の中間層１４を有する。第一の中間層１３及び第二の中間層１４は側壁７として用いられる光硬化性樹脂及び充填材８として用いられる光硬化性樹脂よりも硬化度が小さく、かつ第一の基板１及び第二の基板２よりも光の屈折率が小さい光硬化性樹脂によって形成される。 As described above, the organic electroluminescent element according to Embodiment 4 is spaced from the side wall 7 and the filler 8 between the first substrate 1 side and the second substrate 2 side as shown in FIG. The first intermediate layer 13 and the second intermediate layer 14 are provided. The first intermediate layer 13 and the second intermediate layer 14 have a lower degree of curing than the photocurable resin used as the side wall 7 and the photocurable resin used as the filler 8, and the first substrate 1 and the second intermediate layer 14. It is made of a photocurable resin having a light refractive index smaller than that of the substrate 2.
　有機電界発光素子の厚さ方向における第一の中間層１３及び第二の中間層１４の断面形状は直角三角形状であり、第一の中間層１３は第一の基板１に近い部分が、第二の中間層１４は第二の基板２に近い部分がそれぞれ厚くなるよう傾斜面を有する。 The cross-sectional shape of the first intermediate layer 13 and the second intermediate layer 14 in the thickness direction of the organic electroluminescent element is a right triangle, and the first intermediate layer 13 has a portion close to the first substrate 1 in the first direction. The second intermediate layer 14 has an inclined surface so that a portion near the second substrate 2 is thickened.
　このような構成とすることにより、少ない樹脂量で第一の中間層１３及び第二の中間層１４を形成し、透過する水分の量が他の部分に比べて多い第一の基板１及び第二の基板２と側壁７の界面付近で、側壁７と充填材８の間に隙間が生じることを抑制するとともに、傾斜面による屈折によって有機発光体６から放射された光を第一の基板１及び第二の基板２の方向へ引き出すことができる。 By adopting such a configuration, the first intermediate layer 13 and the second intermediate layer 14 are formed with a small amount of resin, and the first substrate 1 and the first substrate 1 have a larger amount of permeated moisture than other portions. In the vicinity of the interface between the second substrate 2 and the side wall 7, the generation of a gap between the side wall 7 and the filler 8 is suppressed, and light radiated from the organic light emitter 6 due to refraction by the inclined surface is transmitted to the first substrate 1. And can be pulled out in the direction of the second substrate 2.
　（実施形態５）
　図６に示すように、実施形態５の発光装置（有機電界発光素子）は、中間層９の代わりに中間層９２を備える点で、実施形態１の発光装置と異なる。なお、実施形態５の中間層９２以外の構成は、実施形態１と同じであるから、実施形態１と同じ符号を付して説明を省略する。 (Embodiment 5)
As shown in FIG. 6, the light emitting device (organic electroluminescent element) of the fifth embodiment is different from the light emitting device of the first embodiment in that an intermediate layer 92 is provided instead of the intermediate layer 9. In addition, since structures other than the intermediate | middle layer 92 of Embodiment 5 are the same as Embodiment 1, the same code | symbol as Embodiment 1 is attached | subjected and description is abbreviate | omitted.
　中間層９２は、第一の基板１上に設けられる第一の中間層１５と、第二の基板２上に設けられる第二の中間層１６と、を有する。第一の中間層１５と第二の中間層１６とは相互に間隔をおいて設けられている。 The intermediate layer 92 includes a first intermediate layer 15 provided on the first substrate 1 and a second intermediate layer 16 provided on the second substrate 2. The first intermediate layer 15 and the second intermediate layer 16 are spaced from each other.
　第一の中間層１５は、矩形枠状であり、その断面は直角台形状である。したがって、第一の中間層１５の厚みが第二の基板２側から第一の基板１側に向かうにつれて大きくなるよう、第一の中間層１５の充填材８側の面（側面）１５１が傾斜している。また、第一の中間層１５の充填材８側の面１５１は、平面である。ここで、第一の中間層１５の充填材８側の面１５１の傾斜角度は、第一の中間層１３の充填材８側の面１３１の傾斜角度より大きい。 The first intermediate layer 15 has a rectangular frame shape, and its cross section has a right trapezoidal shape. Therefore, the surface (side surface) 151 on the filler 8 side of the first intermediate layer 15 is inclined so that the thickness of the first intermediate layer 15 increases from the second substrate 2 side toward the first substrate 1 side. is doing. Further, the surface 151 on the filler 8 side of the first intermediate layer 15 is a flat surface. Here, the inclination angle of the surface 151 of the first intermediate layer 15 on the filler 8 side is larger than the inclination angle of the surface 131 of the first intermediate layer 13 on the filler 8 side.
　第二の中間層１６は、矩形枠状であり、その断面は直角台形状である。したがって、第二の中間層１６の厚みが第一の基板１側から第二の基板２側に向かうにつれて大きくなるよう、第二の中間層１４の充填材８側の面（側面）１６１が傾斜している。また、第二の中間層１６の充填材８側の面１６１は、平面である。ここで、第二の中間層１６の充填材８側の面１６１の傾斜角度は、第二の中間層１４の充填材８側の面１４１の傾斜角度より大きい。 The second intermediate layer 16 has a rectangular frame shape, and its cross section has a right trapezoidal shape. Accordingly, the surface (side surface) 161 on the filler 8 side of the second intermediate layer 14 is inclined so that the thickness of the second intermediate layer 16 increases from the first substrate 1 side toward the second substrate 2 side. is doing. Further, the surface 161 on the filler 8 side of the second intermediate layer 16 is a flat surface. Here, the inclination angle of the surface 161 on the filler 8 side of the second intermediate layer 16 is larger than the inclination angle of the surface 141 on the filler 8 side of the second intermediate layer 14.
　また、第一及び第二の中間層１５，１６は、中間層９と同じ硬化性樹脂で形成される。したがって、第一の中間層１５は、透光性を有し、第一の基板１よりも屈折率が小さい。同様に、第二の中間層１６は、透光性を有し、第二の基板２よりも屈折率が小さい。 The first and second intermediate layers 15 and 16 are formed of the same curable resin as that of the intermediate layer 9. Therefore, the first intermediate layer 15 has translucency and a refractive index smaller than that of the first substrate 1. Similarly, the second intermediate layer 16 has translucency and a refractive index smaller than that of the second substrate 2.
　つまり、本実施形態に係る有機電界発光素子の厚さ方向における第一の中間層１５及び第二の中間層１６の断面形状は、図６のように台形状であり、それぞれ第一の基板１及び側壁７、第二の基板２及び側壁７に接している。 That is, the cross-sectional shapes of the first intermediate layer 15 and the second intermediate layer 16 in the thickness direction of the organic electroluminescent element according to this embodiment are trapezoidal as shown in FIG. And the side wall 7, the second substrate 2 and the side wall 7.
　第一の中間層１５は第一の基板１に近い部分が、第二の中間層１６は第二の基板２に近い部分がそれぞれ厚くなるよう傾斜面を有し、実施形態４と同様の効果が得られる。特に、第一の中間層１５の面１５１の傾斜角度が第一の中間層１３の面１３１の傾斜角度より大きく、第二の中間層１４の面１４１の傾斜角度が第二の中間層１２の面１２１の傾斜角度より大きいから、実施形態４の場合よりも、有機発光体６から放射された光を第一の基板１及び第二の基板２の方向へ引き出すことができる。 The first intermediate layer 15 has an inclined surface so that a portion close to the first substrate 1 is thickened, and the second intermediate layer 16 has an inclined surface so that a portion close to the second substrate 2 is thick. Is obtained. In particular, the inclination angle of the surface 151 of the first intermediate layer 15 is larger than the inclination angle of the surface 131 of the first intermediate layer 13, and the inclination angle of the surface 141 of the second intermediate layer 14 is that of the second intermediate layer 12. Since the inclination angle of the surface 121 is larger, the light emitted from the organic light emitter 6 can be extracted in the direction of the first substrate 1 and the second substrate 2 than in the case of the fourth embodiment.
　（実施形態６）
　図７に示すように、実施形態６の発光装置（有機電界発光素子）は、中間層９の代わりに中間層９３を備える点で、実施形態１の発光装置と異なる。なお、実施形態６の中間層９３以外の構成は、実施形態１と同じであるから、実施形態１と同じ符号を付して説明を省略する。 (Embodiment 6)
As shown in FIG. 7, the light emitting device (organic electroluminescent element) of the sixth embodiment is different from the light emitting device of the first embodiment in that an intermediate layer 93 is provided instead of the intermediate layer 9. In addition, since structures other than the intermediate | middle layer 93 of Embodiment 6 are the same as Embodiment 1, the same code | symbol as Embodiment 1 is attached | subjected and description is abbreviate | omitted.
　中間層９３は、第一の基板１上に設けられる第一の中間層１７と、第二の基板２上に設けられる第二の中間層１８と、を有する。第一の中間層１７と第二の中間層１８とは相互に間隔をおいて設けられている。 The intermediate layer 93 includes a first intermediate layer 17 provided on the first substrate 1 and a second intermediate layer 18 provided on the second substrate 2. The first intermediate layer 17 and the second intermediate layer 18 are spaced from each other.
　第一の中間層１７は、矩形枠状である。第一の中間層１７の厚みが第二の基板２側から第一の基板１側に向かうにつれて大きくなるよう、第一の中間層１７の充填材８側の面１７１が傾斜している。また、第一の中間層１７の充填材８側の面１７１は、凸面である。つまり、第一の中間層１７の断面は１／４楕円形状である。 The first intermediate layer 17 has a rectangular frame shape. The surface 171 on the filler 8 side of the first intermediate layer 17 is inclined so that the thickness of the first intermediate layer 17 increases from the second substrate 2 side toward the first substrate 1 side. Further, the surface 171 on the filler 8 side of the first intermediate layer 17 is a convex surface. That is, the cross section of the first intermediate layer 17 is a quarter ellipse.
　第二の中間層１８は、矩形枠状である。第二の中間層１８の厚みが第一の基板１側から第二の基板２側に向かうにつれて大きくなるよう、第二の中間層１８の充填材８側の面１８１が傾斜している。また、第二の中間層１８の充填材８側の面１８１は、凸面である。つまり、第二の中間層１８の断面は１／４楕円形状である。 The second intermediate layer 18 has a rectangular frame shape. The surface 181 on the filler 8 side of the second intermediate layer 18 is inclined so that the thickness of the second intermediate layer 18 increases from the first substrate 1 side toward the second substrate 2 side. Further, the surface 181 on the filler 8 side of the second intermediate layer 18 is a convex surface. That is, the cross section of the second intermediate layer 18 is a quarter ellipse.
　また、第一及び第二の中間層１７，１８は、中間層９と同じ硬化性樹脂で形成される。したがって、第一の中間層１７は、透光性を有し、第一の基板１よりも屈折率が小さい。同様に、第二の中間層１８は、透光性を有し、第二の基板２よりも屈折率が小さい。 The first and second intermediate layers 17 and 18 are formed of the same curable resin as the intermediate layer 9. Therefore, the first intermediate layer 17 has translucency and a refractive index smaller than that of the first substrate 1. Similarly, the second intermediate layer 18 is translucent and has a refractive index smaller than that of the second substrate 2.
　つまり、本実施形態に係る有機電界発光素子の第一の中間層１７及び第二の中間層１８は、図７のようにそれぞれ第一の基板１及び側壁７、第二の基板２及び側壁７に接し、さらに湾曲した傾斜面を有する。 That is, the first intermediate layer 17 and the second intermediate layer 18 of the organic electroluminescent element according to the present embodiment are respectively the first substrate 1 and the side wall 7, the second substrate 2 and the side wall 7 as shown in FIG. And has a curved inclined surface.
　第一の中間層１７は第一の基板１に近い部分が、第二の中間層１８は第二の基板２に近い部分がそれぞれ厚くなるよう傾斜面を有し、実施形態４と同様の効果が得られる。特に、第一の中間層１７の充填材８側の面１７１及び第二の中間層１８の充填材８側の面１８１が凸面であるから、実施形態４，５の場合よりも、有機発光体６から放射された光を第一の基板１及び第二の基板２の方向へ引き出すことができる。 The first intermediate layer 17 has an inclined surface so that the portion close to the first substrate 1 is thickened, and the second intermediate layer 18 is thick so that the portion close to the second substrate 2 is thick. Is obtained. In particular, since the surface 171 on the filler 8 side of the first intermediate layer 17 and the surface 181 on the filler 8 side of the second intermediate layer 18 are convex surfaces, the organic light-emitting body is more effective than in the fourth and fifth embodiments. The light emitted from 6 can be extracted in the direction of the first substrate 1 and the second substrate 2.
　（変形例）
　第一の基板１及び第二の基板２は、四角形状以外の形状であってもよい。また、第一の基板１及び第二の基板２は、同じ大きさでなくてもよい。また、第一の基板１及び第二の基板２は、プラスチック基板であってもよい。プラスチック基板の材料は、例えば、ポリエステル、ポリカーボネート、ポリエーテル、ポリスルホン、ポリエーテルスルホン、ポリビニルアルコールである。この場合、プラスチック基板に、水分の透過を防止するバリア層などを設けることが好ましい。 (Modification)
The first substrate 1 and the second substrate 2 may have a shape other than a square shape. Moreover, the 1st board | substrate 1 and the 2nd board | substrate 2 do not need to be the same magnitude | size. The first substrate 1 and the second substrate 2 may be plastic substrates. The material of the plastic substrate is, for example, polyester, polycarbonate, polyether, polysulfone, polyethersulfone, or polyvinyl alcohol. In this case, it is preferable to provide a barrier layer for preventing permeation of moisture on the plastic substrate.
　上記実施形態では、第一及び第二の基板１，２の両方が透光性を有している。しかしながら、第二の基板２は、透光性を有していなくてもよい。この場合、充填材８及び中間層（９，１０，９１，９２，９３）も透光性を有していなくてもよい。 In the above embodiment, both the first and second substrates 1 and 2 have translucency. However, the 2nd board | substrate 2 does not need to have translucency. In this case, the filler 8 and the intermediate layer (9, 10, 91, 92, 93) may not have translucency.
　有機発光体６は、第二の基板２上に設けられ、第一の基板１と間隔をおいて対向してもよい。この場合、第二の基板２、充填材８、中間層（９，１０，９１，９２，９３）が透光性を有するかどうかは、光の取り出し方向によって決定される。 The organic light emitter 6 may be provided on the second substrate 2 and may be opposed to the first substrate 1 at an interval. In this case, whether or not the second substrate 2, the filler 8, and the intermediate layer (9, 10, 91, 92, 93) have translucency is determined by the light extraction direction.
　有機発光体６において、第一の電極３及び第二の電極５は、必要に応じて、一方が反射電極、他方が透明電極であってもよい。 In the organic light-emitting body 6, the first electrode 3 and the second electrode 5 may be one of a reflective electrode and the other of a transparent electrode, as necessary.
　なお、上述の実施形態では側壁７、充填材８、中間層９を光硬化性樹脂によって形成したが、硬化性樹脂として熱硬化性樹脂を用いてもよい。この場合に硬化度は、所定量の熱を加えた後における、エポキシ基の残量によって定められる。 In addition, in the above-mentioned embodiment, although the side wall 7, the filler 8, and the intermediate | middle layer 9 were formed with the photocurable resin, you may use a thermosetting resin as curable resin. In this case, the degree of cure is determined by the remaining amount of epoxy groups after applying a predetermined amount of heat.
　上述の例に限定されず、側壁７、充填材８、中間層９は、適宜の硬化性樹脂（硬化性樹脂組成物）から形成されてもよい。硬化性樹脂は、例えば、アクリル樹脂、フェノール樹脂、メラミン樹脂、エポキシ樹脂、ポリウレタン、ユリア樹脂、アルキド樹脂、及び不飽和ポリエステル樹脂である。 The side wall 7, the filler 8, and the intermediate layer 9 are not limited to the above example, and may be formed from an appropriate curable resin (curable resin composition). Examples of the curable resin include acrylic resin, phenol resin, melamine resin, epoxy resin, polyurethane, urea resin, alkyd resin, and unsaturated polyester resin.
　（本発明に係る態様）
　上記の実施形態及び変形例から明らかなように、本発明に係る第１の態様の発光装置は、透光性を有する第一の基板（１）と、前記第一の基板（１）に対向する第二の基板（２）と、前記第一の基板（１）と前記第二の基板（２）との間に配置される有機発光体（６）と、前記第一の基板（１）と前記第二の基板（２）との間における外周部分に設けられる側壁（７）と、前記第一の基板（１）、前記第二の基板（２）、前記有機発光体（６）、前記側壁（７）が形成する空間に充填され、硬化性樹脂からなる充填材（８）と、を備える。発光装置は、さらに、前記側壁（７）と前記充填材（８）との間に、硬化性樹脂からなる中間層（９，１０，９０，９１，９２，９３）を備える。前記中間層は、前記充填材（８）よりも硬化度が小さい。 (Aspect according to the present invention)
As is clear from the above-described embodiments and modifications, the light-emitting device according to the first aspect of the present invention is opposite to the first substrate (1) having translucency and the first substrate (1). A second substrate (2), an organic light emitter (6) disposed between the first substrate (1) and the second substrate (2), and the first substrate (1) And the second substrate (2), the organic light emitter (6), the side wall (7) provided on the outer peripheral portion between the first substrate (2) and the second substrate (2), And a filler (8) made of a curable resin, filled in a space formed by the side wall (7). The light emitting device further includes an intermediate layer (9, 10, 90, 91, 92, 93) made of a curable resin between the side wall (7) and the filler (8). The intermediate layer has a lower curing degree than the filler (8).
　本発明に係る第２の態様の発光装置は、第１の態様との組み合わせにより実現され、前記側壁（７）は、硬化性樹脂からなる。前記中間層（９，１０，９０，９１，９２，９３）は、前記側壁（７）よりも硬化度が小さい。 The light emitting device of the second aspect according to the present invention is realized by a combination with the first aspect, and the side wall (7) is made of a curable resin. The intermediate layer (9, 10, 90, 91, 92, 93) is less hardened than the side wall (7).
　本発明に係る第３の態様の発光装置は、第１又は第２の態様との組み合わせにより実現され、前記中間層（９，１０）は、前記第一の基板（１）から前記第二の基板（２）にかけて設けられている。 The light emitting device of the third aspect according to the present invention is realized by a combination with the first or second aspect, and the intermediate layer (9, 10) is formed from the first substrate (1) to the second one. It is provided over the substrate (2).
　本発明に係る第４の態様の発光装置は、第３の態様との組み合わせにより実現され、前記中間層（１０）の厚みが前記第一の基板（１）と前記第二の基板（２）との間の部分から前記第一の基板（１）に接する部分及び前記第二の基板（２）に接する部分に向かうにつれて大きくなるよう、前記中間層（１０）の前記充填材（８）側の面（１００）が傾斜している。 The light emitting device of the fourth aspect according to the present invention is realized by a combination with the third aspect, and the thickness of the intermediate layer (10) is the first substrate (1) and the second substrate (2). The intermediate layer (10) on the side of the filler (8) so as to increase from a portion between and a portion in contact with the first substrate (1) and a portion in contact with the second substrate (2) The surface (100) is inclined.
　本発明に係る第５の態様の発光装置は、第１～第４の態様のいずれか一つとの組み合わせにより実現され、前記充填材（８）は、透光性を有する。前記中間層（９，１０）は、透光性を有し、前記第一の基板（１）よりも屈折率が小さい。 The light emitting device according to the fifth aspect of the present invention is realized by a combination with any one of the first to fourth aspects, and the filler (8) has translucency. The intermediate layers (9, 10) are translucent and have a refractive index smaller than that of the first substrate (1).
　本発明に係る第６の態様の発光装置は、第５の態様との組み合わせにより実現され、前記第二の基板（２）は、透光性を有する。前記中間層（９，１０）は、前記第二の基板（２）よりも屈折率が小さい。 The light emitting device of the sixth aspect according to the present invention is realized in combination with the fifth aspect, and the second substrate (2) has translucency. The intermediate layer (9, 10) has a refractive index smaller than that of the second substrate (2).
　本発明に係る第７の態様の発光装置は、第１又は第２の態様との組み合わせにより実現され、前記中間層（９０，９１，９２，９３）は、前記第一の基板（１）上に設けられる第一の中間層（１１，１３，１５，１７）と、前記第二の基板（２）上に設けられる第二の中間層（１２，１４，１６，１８）と、を有する。前記第一の中間層（１１，１３，１５，１７）と前記第二の中間層（１２，１４，１６，１８）とは、相互に間隔をおいて設けられている。 A light emitting device according to a seventh aspect of the present invention is realized by a combination with the first or second aspect, and the intermediate layer (90, 91, 92, 93) is formed on the first substrate (1). The first intermediate layer (11, 13, 15, 17) provided on the second substrate (2) and the second intermediate layer (12, 14, 16, 18) provided on the second substrate (2). The first intermediate layer (11, 13, 15, 17) and the second intermediate layer (12, 14, 16, 18) are spaced from each other.
　本発明に係る第８の態様の発光装置は、第７の態様との組み合わせにより実現され、前記第一の中間層（１３，１５，１７）の厚みが前記第二の基板（２）側から前記第一の基板（１）側に向かうにつれて大きくなるよう、前記第一の中間層（１３，１５，１７）の前記充填材（８）側の面（１３１，１５１，１７１）が傾斜している。前記第二の中間層（１４，１６，１８）の厚みが前記第一の基板（１）側から前記第二の基板（２）側に向かうにつれて大きくなるよう、前記第二の中間層（１４，１６，１８）の前記充填材（８）側の面（１４１，１６１，１８１）が傾斜している。 The light emitting device of the eighth aspect according to the present invention is realized by a combination with the seventh aspect, and the thickness of the first intermediate layer (13, 15, 17) is from the second substrate (2) side. Surfaces (131, 151, 171) on the filler (8) side of the first intermediate layer (13, 15, 17) are inclined so as to increase toward the first substrate (1) side. Yes. The second intermediate layer (14) is formed such that the thickness of the second intermediate layer (14, 16, 18) increases from the first substrate (1) side toward the second substrate (2) side. , 16, 18) the surfaces (141, 161, 181) on the filler (8) side are inclined.
　本発明に係る第９の態様の発光装置は、第８の態様との組み合わせにより実現され、前記第一の中間層（１３，１５）の前記充填材（８）側の面（１３１，１５１）及び前記第二の中間層（１４，１６）の前記充填材（８）側の面（１４１，１６１）のそれぞれは、平面である。 The light emitting device of the ninth aspect according to the present invention is realized by combination with the eighth aspect, and the surface (131, 151) on the filler (8) side of the first intermediate layer (13, 15). Each of the surfaces (141, 161) on the filler (8) side of the second intermediate layer (14, 16) is a flat surface.
　本発明に係る第１０の態様の発光装置は、第８の態様との組み合わせにより実現され、前記第一の中間層（１７）の前記充填材（８）側の面（１７１）及び前記第二の中間層（１８）の前記充填材（８）側の面（１８１）のそれぞれは、凸面である。 The light emitting device of the tenth aspect according to the present invention is realized by a combination with the eighth aspect, and the surface (171) on the filler (8) side of the first intermediate layer (17) and the second one. Each of the surface (181) of the intermediate layer (18) on the filler (8) side is a convex surface.
　本発明に係る第１１の態様の発光装置は、第７～第１０の態様のいずれか一つとの組み合わせにより実現され、前記充填材（８）は、透光性を有する。前記第一の中間層（１１，１３，１５，１７）は、透光性を有し、前記第一の基板（１）よりも屈折率が小さい。 The light emitting device of the eleventh aspect according to the present invention is realized by a combination with any one of the seventh to tenth aspects, and the filler (8) has translucency. The first intermediate layer (11, 13, 15, 17) is translucent and has a lower refractive index than the first substrate (1).
　本発明に係る第１２の態様の発光装置は、第１０の態様との組み合わせにより実現され、前記第二の基板（２）は、透光性を有する。前記第二の中間層（１２，１４，１６，１８）は、前記第二の基板（２）よりも屈折率が小さい。 The light emitting device of the twelfth aspect according to the present invention is realized by a combination with the tenth aspect, and the second substrate (2) has translucency. The second intermediate layer (12, 14, 16, 18) has a refractive index smaller than that of the second substrate (2).
　本発明に係る態様によれば、防水性が向上した発光装置を提供できる。換言すれば、従来に比べて有機発光体に水分が到達することを抑制した有機電界発光素子を提供することができる。 According to the aspect of the present invention, a light emitting device with improved waterproofness can be provided. In other words, it is possible to provide an organic electroluminescent element that suppresses moisture from reaching the organic light emitter as compared with the conventional case.

Claims (12)

  1. 　透光性を有する第一の基板と、
    　前記第一の基板に対向する第二の基板と、
    　前記第一の基板と前記第二の基板との間に配置される有機発光体と、
    　前記第一の基板と前記第二の基板との間における外周部分に設けられる側壁と、
    　前記第一の基板、前記第二の基板、前記有機発光体、前記側壁が形成する空間に充填され、硬化性樹脂からなる充填材と、
    　を備え、
    　さらに、前記側壁と前記充填材との間に、硬化性樹脂からなる中間層を備え、
    　前記中間層は、前記充填材よりも硬化度が小さい、
    　発光装置。     A first substrate having translucency;
    A second substrate facing the first substrate;
    An organic light emitter disposed between the first substrate and the second substrate;
    A side wall provided at an outer peripheral portion between the first substrate and the second substrate;
    The first substrate, the second substrate, the organic light emitter, the filler formed in the space formed by the sidewall, and made of a curable resin;
    With
    Furthermore, an intermediate layer made of a curable resin is provided between the side wall and the filler,
    The intermediate layer has a lower degree of curing than the filler,
    Light emitting device.
  2. 　前記側壁は、硬化性樹脂からなり、
    　前記中間層は、前記側壁よりも硬化度が小さい、
    　請求項１に記載の発光装置。     The side wall is made of a curable resin,
    The intermediate layer has a lower degree of curing than the side wall,
    The light emitting device according to claim 1.
  3. 　前記中間層は、前記第一の基板から前記第二の基板にかけて設けられている、
    　請求項１又は２に記載の発光装置。     The intermediate layer is provided from the first substrate to the second substrate.
    The light emitting device according to claim 1.
  4. 　前記中間層の厚みが前記第一の基板と前記第二の基板との間の部分から前記第一の基板に接する部分及び前記第二の基板に接する部分に向かうにつれて大きくなるよう、前記中間層の前記充填材側の面が傾斜している、
    　請求項３に記載の発光装置。     The intermediate layer has a thickness that increases from a portion between the first substrate and the second substrate toward a portion in contact with the first substrate and a portion in contact with the second substrate. The surface of the filler side of is inclined,
    The light emitting device according to claim 3.
  5. 　前記充填材は、透光性を有し、
    　前記中間層は、透光性を有し、前記第一の基板よりも屈折率が小さい、
    　請求項１～４のいずれか一つに記載の発光装置。     The filler has translucency,
    The intermediate layer has translucency and has a refractive index smaller than that of the first substrate.
    The light emitting device according to any one of claims 1 to 4.
  6. 　前記第二の基板は、透光性を有し、
    　前記中間層は、前記第二の基板よりも屈折率が小さい、
    　請求項５に記載の発光装置。     The second substrate has translucency,
    The intermediate layer has a refractive index smaller than that of the second substrate.
    The light emitting device according to claim 5.
  7. 　前記中間層は、
    　　前記第一の基板上に設けられる第一の中間層と、
    　　前記第二の基板上に設けられる第二の中間層と、
    　を有し、
    　前記第一の中間層と前記第二の中間層とは、相互に間隔をおいて設けられている、
    　請求項１又は２に記載の発光装置。     The intermediate layer is
    A first intermediate layer provided on the first substrate;
    A second intermediate layer provided on the second substrate;
    Have
    The first intermediate layer and the second intermediate layer are spaced from each other,
    The light emitting device according to claim 1.
  8. 　前記第一の中間層の厚みが前記第二の基板側から前記第一の基板側に向かうにつれて大きくなるよう、前記第一の中間層の前記充填材側の面が傾斜し、
    　前記第二の中間層の厚みが前記第一の基板側から前記第二の基板側に向かうにつれて大きくなるよう、前記第二の中間層の前記充填材側の面が傾斜している、
    　請求項７に記載の発光装置。     The surface on the filler side of the first intermediate layer is inclined so that the thickness of the first intermediate layer increases from the second substrate side toward the first substrate side,
    The filler side surface of the second intermediate layer is inclined so that the thickness of the second intermediate layer increases from the first substrate side toward the second substrate side,
    The light emitting device according to claim 7.
  9. 　前記第一の中間層の前記充填材側の面及び前記第二の中間層の前記充填材側の面のそれぞれは、平面である、
    　請求項８に記載の発光装置。     Each of the surface on the filler side of the first intermediate layer and the surface on the filler side of the second intermediate layer is a plane.
    The light emitting device according to claim 8.
  10. 　前記第一の中間層の前記充填材側の面及び前記第二の中間層の前記充填材側の面のそれぞれは、凸面である、
    　請求項８に記載の発光装置。     Each of the surface on the filler side of the first intermediate layer and the surface on the filler side of the second intermediate layer is a convex surface.
    The light emitting device according to claim 8.
  11. 　前記充填材は、透光性を有し、
    　前記第一の中間層は、透光性を有し、前記第一の基板よりも屈折率が小さい、
    　請求項７～１０のいずれか一つに記載の発光装置。     The filler has translucency,
    The first intermediate layer has translucency and has a refractive index smaller than that of the first substrate.
    The light emitting device according to any one of claims 7 to 10.
  12. 　前記第二の基板は、透光性を有し、
    　前記第二の中間層は、前記第二の基板よりも屈折率が小さい、
    　請求項１０に記載の発光装置。     The second substrate has translucency,
    The second intermediate layer has a refractive index smaller than that of the second substrate.
    The light emitting device according to claim 10.
PCT/JP2015/002983 2014-06-19 2015-06-15 Light emitting device WO2015194156A1 (en)

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