WO2015155924A1 - 有機el素子及び照明装置 - Google Patents
有機el素子及び照明装置 Download PDFInfo
- Publication number
- WO2015155924A1 WO2015155924A1 PCT/JP2015/001040 JP2015001040W WO2015155924A1 WO 2015155924 A1 WO2015155924 A1 WO 2015155924A1 JP 2015001040 W JP2015001040 W JP 2015001040W WO 2015155924 A1 WO2015155924 A1 WO 2015155924A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- region
- organic
- layer
- light
- light emitting
- Prior art date
Links
- 239000000758 substrate Substances 0.000 claims abstract description 84
- 230000003287 optical effect Effects 0.000 claims abstract description 75
- 239000000463 material Substances 0.000 claims description 32
- 238000000862 absorption spectrum Methods 0.000 claims description 27
- 238000000149 argon plasma sintering Methods 0.000 claims description 19
- 238000005286 illumination Methods 0.000 claims description 9
- 239000011810 insulating material Substances 0.000 claims description 4
- 239000010410 layer Substances 0.000 description 349
- 238000005401 electroluminescence Methods 0.000 description 97
- 239000010408 film Substances 0.000 description 45
- 230000002040 relaxant effect Effects 0.000 description 39
- 238000000034 method Methods 0.000 description 11
- 238000000059 patterning Methods 0.000 description 11
- 229920005989 resin Polymers 0.000 description 11
- 239000011347 resin Substances 0.000 description 11
- 238000010586 diagram Methods 0.000 description 9
- 238000007789 sealing Methods 0.000 description 9
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 239000011521 glass Substances 0.000 description 5
- 238000007740 vapor deposition Methods 0.000 description 5
- 239000004642 Polyimide Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 229920001940 conductive polymer Polymers 0.000 description 4
- 239000004020 conductor Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 229920001721 polyimide Polymers 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 229910052709 silver Inorganic materials 0.000 description 4
- 239000004332 silver Substances 0.000 description 4
- 238000004544 sputter deposition Methods 0.000 description 4
- 230000004304 visual acuity Effects 0.000 description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 239000000470 constituent Substances 0.000 description 3
- 238000001723 curing Methods 0.000 description 3
- 229920000178 Acrylic resin Polymers 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229920001609 Poly(3,4-ethylenedioxythiophene) Polymers 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- MWPLVEDNUUSJAV-UHFFFAOYSA-N anthracene Chemical compound C1=CC=CC2=CC3=CC=CC=C3C=C21 MWPLVEDNUUSJAV-UHFFFAOYSA-N 0.000 description 2
- 239000002041 carbon nanotube Substances 0.000 description 2
- 229910021393 carbon nanotube Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 229920000767 polyaniline Polymers 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- 229910052814 silicon oxide Inorganic materials 0.000 description 2
- 238000004528 spin coating Methods 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000005385 borate glass Substances 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 150000004696 coordination complex Chemical class 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 150000004985 diamines Chemical class 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000002019 doping agent Substances 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 230000005525 hole transport Effects 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920003986 novolac Polymers 0.000 description 1
- 239000012044 organic layer Substances 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 239000005365 phosphate glass Substances 0.000 description 1
- 238000000016 photochemical curing Methods 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 238000005268 plasma chemical vapour deposition Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- YVTHLONGBIQYBO-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) Chemical compound [O--].[Zn++].[In+3] YVTHLONGBIQYBO-UHFFFAOYSA-N 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/221—Static displays, e.g. displaying permanent logos
-
- 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
- H10K50/80—Constructional details
- H10K50/805—Electrodes
- H10K50/81—Anodes
-
- 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
- H10K50/80—Constructional details
- H10K50/805—Electrodes
- H10K50/82—Cathodes
- H10K50/828—Transparent cathodes, e.g. comprising thin metal layers
-
- 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
- H10K50/80—Constructional details
- H10K50/85—Arrangements for extracting light from the devices
- H10K50/854—Arrangements for extracting light from the devices comprising scattering means
-
- 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
- H10K50/80—Constructional details
- H10K50/86—Arrangements for improving contrast, e.g. preventing reflection of ambient light
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K2102/00—Constructional details relating to the organic devices covered by this subclass
- H10K2102/301—Details of OLEDs
- H10K2102/302—Details of OLEDs of OLED structures
- H10K2102/3023—Direction of light emission
- H10K2102/3031—Two-side emission, e.g. transparent OLEDs [TOLED]
Definitions
- the present invention relates to an organic EL (Electro-Luminescence) element and a lighting device including the organic EL element.
- organic EL Electro-Luminescence
- Patent Document 1 discloses an organic EL display device including an organic EL element.
- the organic EL display device described in Patent Document 1 includes a pair of electrodes, an organic EL layer provided between the pair of electrodes, and a pattern portion disposed on both surfaces of the main body. Furthermore, the organic EL display device includes a light-shielding layer that opens a light-emitting region and shields a non-light-emitting region between a light-emitting unit and a pattern unit, a circularly polarizing plate that covers the entire surface of the light-emitting unit and the non-light-emitting unit, A transflective layer that covers the entire surface of the non-light emitting portion is provided. This suppresses a decrease in contrast in the pattern layer.
- the non-light emitting region is shielded from light, the shape of the light emitting region can be confirmed in the light emitting surface even when no light is emitted. In other words, a natural light emitting surface cannot be shown when no light is emitted.
- the light emitting surface is a plane including a light emitting region and a non-light emitting region.
- the present invention provides an organic EL element and a lighting device that can show a natural light emitting surface when not emitting light.
- an organic EL element includes a light-transmitting substrate, a pair of electrode layers that are stacked above the substrate, at least one of which has light-transmitting properties, A planar light emitting layer provided between the pair of electrode layers, wherein one of the pair of electrode layers is disposed in a first region in plan view, and the organic EL element is further arranged in the plan view. And a relaxation layer disposed in a second region adjacent to the first region, for relaxing a difference in optical characteristics between the first region and the second region with respect to predetermined light.
- the organic EL element and the lighting device according to the present invention can show a natural light emitting surface when no light is emitted.
- FIG. 1A is a top view showing an organic EL element according to Embodiment 1 of the present invention.
- FIG. 1B is a bottom view showing the organic EL element according to Embodiment 1 of the present invention.
- FIG. 2 is a cross-sectional view showing the organic EL element according to Embodiment 1 of the present invention.
- FIG. 3 is a diagram showing a lighting example and a light-off example of the organic EL element according to Embodiment 1 of the present invention.
- FIG. 4 is a cross-sectional view showing an organic EL element according to Embodiment 2 of the present invention.
- FIG. 5A is a cross-sectional view showing an organic EL element according to Embodiment 3 of the present invention.
- FIG. 5B is a cross-sectional view showing another example of the organic EL element according to Embodiment 3 of the present invention.
- FIG. 6 is a sectional view showing an organic EL element according to Embodiment 4 of the present invention.
- FIG. 7 is a diagram showing a lighting example of the organic EL element according to Embodiment 4 of the present invention.
- FIG. 8 is a sectional view showing an organic EL element according to Embodiment 5 of the present invention.
- FIG. 9 is a diagram showing an illumination apparatus according to Embodiment 6 of the present invention.
- FIG. 10 is a diagram illustrating a lighting example of the lighting apparatus according to Embodiment 6 of the present invention.
- a conventional organic EL element for example, by forming at least one of a pair of electrodes in a predetermined shape (for example, a character or a symbol), light can be emitted in the predetermined shape. That is, in the organic EL element, the light emitting region and the non-light emitting region can be provided in a plane by forming at least one of the pair of electrodes in a predetermined shape.
- a predetermined shape for example, a character or a symbol
- an organic EL element includes a light-transmitting substrate and a pair of electrode layers that are stacked over the substrate and at least one of which has a light-transmitting property. And a planar light emitting layer provided between the pair of electrode layers, one of the pair of electrode layers is disposed in a first region in plan view, and the organic EL element further includes a first region in plan view. And a relaxation layer for relaxing a difference in optical characteristics of the first region and the second region with respect to predetermined light, which is disposed in a second region adjacent to the first region.
- the relaxation layer relieves the difference in optical characteristics between the first region and the second region, it is possible to suppress the appearance of the shape of the first region when no light is emitted. Accordingly, it is possible to show a natural light emitting surface when not emitting light, that is, a flat surface without a sense of incongruity without seeing a light emitting pattern or the like.
- FIG. 1A, FIG. 1B, and FIG. 1A and 1B are a top view and a bottom view, respectively, showing an organic EL element 10 according to the present embodiment.
- FIG. 2 is a cross-sectional view showing the organic EL element 10 according to the present embodiment.
- FIG. 1B is a view of the organic EL element 10 as viewed from below, but does not show the substrate 100.
- FIG. 2 shows an AA cross section in FIGS. 1A and 1B.
- the X-axis direction and the Y-axis direction are two directions that are parallel to and orthogonal to the light-emitting surface of the organic EL element 10, and the Z-axis direction is the light-emitting surface of the organic EL element 10.
- the vertical direction is the X-axis direction and the Y-axis direction.
- the organic EL element 10 has a first region 11 and a second region 12 in plan view.
- the first region 11 and the second region 12 are adjacent to each other in the plane of the organic EL element 10.
- the first region 11 is a light emitting region of the organic EL element 10 in a plan view
- the second region 12 is a non-light emitting region. That is, the organic EL element 10 emits light from the first region 11 and does not emit light from the second region 12 when viewed in plan.
- the first region 11 is surrounded by the second region 12.
- the organic EL element 10 includes a pair of substrates 100 and 110, a pair of first electrode layers 120 and second electrode layers 130, a planar light emitting layer 140, and a relaxation layer 150.
- an insulating groove 160 is provided between the first electrode layer 120 and the relaxing layer 150.
- the first region 11 is a region where the first electrode layer 120 is disposed. Specifically, the first region 11 is a region formed by the first electrode layer 120. That is, the shape of the first region 11 and the shape of the first electrode layer 120 in plan view are substantially the same.
- the second region 12 is a region where the first electrode layer 120 is not disposed in plan view. Specifically, the second region 12 is a region where the relaxing layer 150 and the insulating groove 160 are disposed.
- terminal portions 121 and 131 are provided. Although not shown, the terminal portions 121 and 131 are provided on the substrate 100. The terminal portions 121 and 131 are extraction electrodes for supplying power to the first electrode layer 120 and the second electrode layer 130, respectively.
- the substrates 100 and 110 are a pair of substrates provided such that their main surfaces face each other.
- the substrate 100 is a light-transmitting substrate.
- the substrate 100 is a transparent substrate that transmits at least part of visible light.
- the main surface of the substrate 100 (the lower surface of the substrate 100 in FIG. 2) opposite to the main surface facing the substrate 110 is the light emitting surface.
- the substrate 100 is a glass substrate such as soda glass, alkali-free glass, non-fluorescent glass, phosphate glass, or borate glass.
- the substrate 100 may be a quartz substrate or a plastic substrate.
- the substrate 100 may contain particles, powder, bubbles, etc. having a refractive index different from that of the substrate matrix in the substrate, or have a light diffusion effect by giving a shape to the substrate surface. Can also be used.
- the substrate 110 is a sealing substrate for sealing the planar light emitting layer 140 together with the substrate 100.
- An end portion of the substrate 110 is fixed to the substrate 100 by a sealing member (not shown) or the like.
- the substrate 110 is a box-shaped substrate having an open bottom surface. A side wall portion erected downward (Z-axis negative direction) from the end portion of the main surface of the substrate 110 is fixed to the substrate 100 by a sealing member or the like.
- the substrate 110 is a substrate having a recess, and the planar light emitting layer 140 is disposed in the recess.
- the recess is formed, for example, by digging a plate-like substrate material.
- the substrate 110 is a light-transmitting substrate.
- the substrate 110 is a transparent substrate that transmits at least part of visible light.
- the substrate 110 is a glass substrate, a quartz substrate, or a plastic substrate.
- substrate 110 does not need to have a light transmittance, for example, may be comprised from metals, such as stainless steel, aluminum, copper. Since the coefficients of thermal expansion are equalized when the substrate 100 and the substrate 110 have the same composition, the occurrence of cracks and poor sealing can be suppressed.
- the sealing member used for connecting the substrate 100 and the substrate 110 is, for example, a photo-curing resin such as an epoxy resin, an acrylic resin, or a silicon resin.
- the sealing member may be a thermosetting resin, a two-component curable resin, or a thermoplastic resin such as polyethylene or polypropylene.
- the inside can be sealed by applying a sealing member to at least one of the substrates 100 and 110 and bonding and curing the substrates 100 and 110.
- the space between the substrates 100 and 110 may be filled with a resin material (filling resin, fill material) or the like. Thereby, the sealing performance of the planar light emitting layer 140 can be further improved.
- a resin material filling resin, fill material
- contact between the substrate 100 and the substrate 110 can be suppressed, so that reliability can be ensured even when the substrate 110 is not formed with a recess. It becomes.
- the first electrode layer 120 and the second electrode layer 130 are a pair of electrode layers that are stacked above the substrate 100 and at least one of which has a light-transmitting property.
- the first electrode layer 120 is an electrode provided on the light emitting surface side, and is provided on the substrate 100, for example.
- the first electrode layer 120 is, for example, an anode, and a voltage higher than that of the second electrode layer 130 is applied when the planar light emitting layer 140 emits light.
- the first electrode layer 120 is made of a conductive material having translucency.
- the first electrode layer 120 is made of a transparent conductive material that transmits at least part of visible light.
- the first electrode layer 120 is made of, for example, indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide doped with aluminum (AZO), or the like.
- the first electrode layer 120 may be a thin metal film such as silver or aluminum that can transmit light. Ag nanowires and Ag particles may be dispersed.
- a conductive polymer such as PEDOT or polyaniline, a conductive polymer doped with an arbitrary acceptor, or a conductive light-transmitting material such as a carbon nanotube is used. it can.
- the first electrode layer 120 is formed by forming a transparent conductive film on the substrate 100 by vapor deposition, coating, sputtering, or the like, and patterning the formed transparent conductive film.
- the first electrode layer 120 is disposed in the first region 11.
- the planar view shape of the first electrode layer 120 corresponds to the light emitting region (first region 11).
- the planar light emitting layer 140 can emit light in the predetermined shape.
- the first electrode layer 120 is patterned in the shape of an arrow.
- the planar view shape of the 1st electrode layer 120 is not restricted to this.
- the planar view shape of the first electrode layer 120 may be a predetermined character, number, symbol, figure, pattern, or the like. Patterning may be performed by etching after film formation. In addition, it can be manufactured at low cost by patterning with a mask. In addition, by directly drawing with a laser or the like, it becomes easy to pattern various types.
- the first electrode layer 120 is electrically connected to the terminal portion 121. As shown in FIG. 1B, the terminal portion 121 is provided so that a part of the first electrode layer 120 extends.
- the terminal portion 121 is formed by patterning the conductive film in the same process as the first electrode layer 120. Therefore, the terminal part 121 is comprised with the material same as the 1st electrode layer 120, for example. In addition, the terminal part 121 may be comprised from another material by the process different from the 1st electrode layer 120. FIG. For example, the terminal part 121 may be formed simultaneously with the terminal part 131.
- the second electrode layer 130 is an electrode provided on the side opposite to the light emitting surface, and is provided on the planar light emitting layer 140.
- the second electrode layer 130 is, for example, a cathode, and a voltage lower than that of the first electrode layer 120 is applied when the planar light emitting layer 140 emits light.
- the second electrode layer 130 is a reflective electrode that reflects light.
- the second electrode layer 130 reflects the light emitted from the planar light emitting layer 140 and emits it to the light emitting surface side.
- the second electrode layer 130 is made of, for example, aluminum, silver, magnesium, or an alloy containing at least one of these.
- the second electrode layer 130 is formed by forming a conductive film on the planar light emitting layer 140 by vapor deposition, coating, sputtering, or the like.
- the second electrode layer 130 is electrically connected to the terminal portion 131.
- the terminal portion 131 is provided so that a part of the second electrode layer 130 extends along the end surface of the planar light emitting layer 140. That is, the extending portion of the second electrode layer 130 covers the end surface of the planar light emitting layer 140.
- the terminal portion 131 is formed by patterning the conductive film in the same process as the second electrode layer 130. Therefore, the terminal portion 131 is made of the same material as that of the second electrode layer 130, for example.
- the terminal part 131 may be comprised from another material in the process different from the 2nd electrode layer 130.
- the planar light emitting layer 140 is an example of a light emitting unit provided between a pair of the first electrode layer 120 and the second electrode layer 130.
- the planar light emitting layer 140 emits light in a planar shape when a voltage is applied between the first electrode layer 120 and the second electrode layer 130. Specifically, only the light emitting region, that is, the first region 11 of the planar light emitting layer 140 emits light.
- the planar light emitting layer 140 includes a hole injection layer, a hole transport layer, a light emitting layer (organic EL layer), an electron transport layer, and an electron injection layer.
- the organic layer such as the light emitting layer is made of an organic material such as diamine, anthracene, or metal complex.
- the planar light emitting layer 140 may be doped with red, green and blue dopant dyes in the light emitting layer, or the blue hole transporting light emitting layer and the green color.
- a stacked structure of an electron transporting light emitting layer and a red electron transporting light emitting layer may be employed.
- planar light emitting layer 140 may have a multi-unit structure in which red, green, and blue light emitting units are stacked via an intermediate layer having light transmission and conductivity, and are electrically connected directly. .
- Each layer constituting the planar light emitting layer 140 is formed by vapor deposition, spin coating, casting, or the like.
- the relaxation layer 150 is disposed in the second region 12 and relaxes a difference in optical characteristics (optical contrast) between the first region 11 and the second region 12 with respect to predetermined light.
- the relaxation layer 150 is a predetermined region between the first region 11 (light emitting region) and the second region 12 (non-light emitting region) of the organic EL element 10 as compared with the case where the relaxation layer 150 is not provided. The difference in the optical characteristics with respect to the light is reduced.
- the relaxing layer 150 is not provided in the light emitting region, but is provided only in the non-light emitting region.
- the predetermined light is external light that enters the organic EL element 10 from the substrate 100 when no light is emitted.
- the predetermined light is light having a predetermined wavelength, and may be any of RGB, for example. Further, the predetermined light may be light having a peak wavelength of white light emitted by general organic EL illumination.
- the light reflected by the second electrode layer 130 enters the eyes.
- the first region 11 light emitting region
- the first electrode layer 120 light that reciprocates through the substrate 100, the first electrode layer 120, and the planar light emitting layer 140 enters the user's eyes.
- the second region 12 non-light emitting region
- light that reciprocates through the substrate 100, the relaxation layer 150, and the planar light emitting layer 140 is incident on the user's eyes.
- light is partially reflected on the light emitting surface of the substrate 100 and the interface between the layers, and enters the eyes of the user.
- the reflected light different between the first region 11 and the second region 12 is reflected light on the upper surface or the lower surface of the first electrode layer 120 and reflected light on the upper surface or the lower surface of the relaxation layer 150.
- the difference in optical characteristics between the first region 11 and the second region 12 corresponds to the difference between the optical property of the first electrode layer 120 and the optical property of the relaxation layer 150. Therefore, the relaxing layer 150 relaxes the difference in optical characteristics with the first electrode layer 120.
- the relaxing layer 150 reduces the difference in optical characteristics between the first region 11 and the second region 12 with respect to predetermined light to 15% or less. This is because, if the difference in optical characteristics is 15% or less, for example, a human with a visual acuity of 1.0 cannot recognize the difference at a background luminance of 1000 cd / m 2 (general luminance of organic EL lighting). is there.
- the optical characteristics that the relaxation layer 150 according to this embodiment relaxes will be described. Specifically, the optical characteristics are an optical length and an absorption spectrum.
- the optical length is one of optical characteristics.
- the relaxation layer 150 relaxes the phase difference in optical length between the first region 11 and the second region 12 with respect to predetermined light. Specifically, the relaxation layer 150 relaxes the phase difference in optical length between the light emitting region and the non-light emitting region.
- the optical length phase difference between the light emitting region and the non-light emitting region corresponds to the phase difference between the optical length of the first electrode layer 120 and the optical length of the relaxing layer 150.
- the optical length is an optical length with respect to light in the stacking direction, and is specifically represented by the product of the refractive index n and the thickness d.
- the phase difference is expressed by (difference in optical length) / 2 ⁇ / ⁇ .
- ⁇ is a wavelength included in external light incident on the organic EL element 10.
- the phase difference is represented by ⁇ (optical length difference) ⁇ m ⁇ ⁇ / 2 ⁇ / ⁇ .
- m is an integer.
- the relaxation layer 150 relaxes the phase difference from the optical length of the first electrode layer 120.
- the optical length of the first electrode layer 120 is represented by n1 ⁇ d1.
- the thickness d2 of the relaxation layer 150 is such that the optical length n1 ⁇ d1 of the first electrode layer 120 and the optical length n2 ⁇ d2 of the relaxation layer 150 are Is determined so as to reduce the difference.
- the film thickness d2 of the relaxation layer 150 may be determined to a value close to d1 ⁇ (n1 / n2).
- d2 may be determined to be 0.85 to 1.15 times larger than d1 ⁇ (n1 / n2).
- the optical length of the first electrode layer 120 is 200 nm.
- the refractive index n2 of the relaxation layer 150 is 1.9 and the film thickness d2 is 90 nm, the optical length of the relaxation layer 150 is 171 nm.
- the phase difference between the light emitting region and the non-light emitting region when the relaxing layer 150 is not provided in the non-light emitting region is (200/500) / 2 ⁇ . It is.
- the relaxation layer 150 is provided in the non-light emitting region, the phase difference between the light emitting region and the non-light emitting region is (200-171) / 500 / 2 ⁇ . Therefore, it can be seen that the relaxation layer 150 relaxes the phase difference of the optical length between the light emitting region and the non-light emitting region as compared with the case where the relaxation layer 150 is not provided.
- the film thickness d2 of the relaxing layer 150 may be determined so that the optical length of the first electrode layer 120 and the optical length of the relaxing layer 150 coincide. That is, the thickness d2 of the relaxation layer 150 may be equal to d1 ⁇ (n1 / n2). Thereby, it can suppress that a pattern like an interference fringe appears between a light emission area
- the relaxing layer 150 is made of the same material and the same film thickness as the first electrode layer 120. Since the relaxation layer 150 is made of the same material as the first electrode layer 120, the refractive index n2 of the relaxation layer 150 is equal to the refractive index n1 of the first electrode layer 120. Further, since the thickness d2 of the relaxation layer 150 is equal to the thickness d1 of the first electrode layer 120, the optical length of the relaxation layer 150 is equal to the optical length of the first electrode layer 120. Thereby, the phase difference of the optical length between the first electrode layer 120 and the relaxing layer 150 becomes substantially zero.
- the relaxation layer 150 is provided in the same layer as the first electrode layer 120.
- the reflected light on the upper surface or the lower surface of the relaxation layer 150 described above can be brought close to the reflected light on the upper surface or the lower surface of the first electrode layer 120.
- the relaxation layer 150 and the first electrode layer 120 can be formed in the same process, the manufacturing process can be facilitated and the manufacturing cost can be reduced.
- the relaxing layer 150 is formed by forming a conductive film on the substrate 100 by a vapor deposition method, a coating method, a sputtering method, or the like, and patterning the formed conductive film. .
- the relaxation layer 150 can be easily formed with the same material and the same film thickness as the first electrode layer 120.
- an insulating groove is provided between the first electrode layer 120 and the relaxing layer 150 as shown in FIGS. 1B and 2. 160 is provided. The insulating groove 160 will be described later.
- the difference in optical length need not be zero.
- the difference in optical length between the light emitting region and the non-light emitting region may be set to be an integral multiple of a half wavelength of incident light or a value close thereto, and the phase difference may be reduced. Even in this case, the interference fringes can be made almost invisible.
- the absorption spectrum is one of the optical characteristics.
- the relaxation layer 150 relaxes the absorption spectrum difference between the first region 11 and the second region 12 with respect to predetermined light. Specifically, the relaxation layer 150 relaxes the absorption spectrum difference between the light emitting region and the non-light emitting region. The difference in absorption spectrum between the light emitting region and the non-light emitting region corresponds to the difference between the absorption spectrum of the first electrode layer 120 and the absorption spectrum of the relaxation layer 150. The relaxation layer 150 relaxes the absorption spectrum difference from the first electrode layer 120.
- the absorption coefficient for the predetermined light of the first electrode layer 120 is ⁇ 1 and the film thickness is d1
- the absorption spectrum amount of the first electrode layer 120 is represented by ⁇ 1 ⁇ d1.
- the absorption coefficient varies depending on the wavelength of incident light.
- the thickness d2 of the relaxation layer 150 is determined by the absorption spectrum amount ⁇ 1 ⁇ d1 of the first electrode layer 120 and the absorption of the relaxation layer 150. It is determined so as to reduce the difference from the spectral amount ⁇ 2 ⁇ d2.
- the film thickness d2 of the relaxation layer 150 may be determined to a value close to d1 ⁇ ( ⁇ 1 / ⁇ 2).
- d2 may be determined to be 0.85 to 1.15 times d1 ⁇ ( ⁇ 1 / ⁇ 2).
- the absorption spectrum difference between the light emitting region and the non-light emitting region when the relaxing layer 150 is not provided in the non light emitting region is 100 nm ⁇ 0.03.
- the absorption spectrum difference can be made substantially zero.
- the film thickness d2 of the relaxation layer 150 may be determined so that the absorption spectrum amount of the first electrode layer 120 matches the absorption spectrum amount of the relaxation layer 150. That is, the thickness d2 of the relaxing layer 150 may be equal to d1 ⁇ ( ⁇ 1 / ⁇ 2). Thereby, when the organic EL element 10 is seen from the front, it can suppress that a color difference appears in a light emission area
- the relaxation layer 150 is configured with the same material and the same film thickness as the first electrode layer 120, so that the relaxation layer 150 and the first electrode layer 120 are formed.
- the absorption spectrum difference can be made substantially zero.
- the relaxation layer 150 may be made of a material different from that of the first electrode layer 120.
- the relaxation layer 150 may be made of polyimide, acrylic, or novolac resin material.
- the relaxation layer 150 may be made of a metal thin film such as aluminum or silver.
- the relaxation layer 150 is made of a material different from that of the first electrode layer 120, in order to reduce both the optical length phase difference and the absorption spectrum difference, the difference in the optical length is reduced by the incident light. What is necessary is just to use a value close to an integral multiple of a half wavelength.
- the thickness d2 of the relaxation layer 150 is such that the difference in optical spectrum with the first electrode layer 120 is substantially equal to an integral multiple of the half wavelength of incident light, and the difference in absorption spectrum is close to zero. Should be selected. As a result, the optical length phase difference and absorption spectrum difference can be simultaneously reduced.
- the insulating groove 160 is a groove provided between the first electrode layer 120 and the relaxing layer 150.
- the insulating groove 160 is electrically insulated by separating the first electrode layer 120 and the relaxing layer 150. Thereby, it is possible to prevent the power supplied from the terminal unit 121 from being supplied to the relaxation layer 150. That is, as a result, only the first electrode layer 120 forms a light emitting region.
- the insulating groove 160 is formed by patterning the conductive film. Any patterning method may be used, for example, photolithography. Alternatively, the conductive film in the insulating groove 160 may be removed using laser light, or the conductive film may be physically (mechanically) removed.
- the insulating groove 160 has a taper.
- the end surface of the first electrode layer 120 and the end surface of the relaxing layer 150 are inclined with respect to the stacking direction.
- the insulating groove 160 is formed so that its width becomes wider from the substrate 100 toward the substrate 110.
- the disconnection of the upper layer of the insulating groove 160 can be suppressed. Specifically, disconnection of the layers constituting the planar light emitting layer 140 can be suppressed. Therefore, a short circuit between electrodes can be suppressed and the reliability of the organic EL element 10 can be improved.
- the optical characteristics of the region where the insulating groove 160 is provided are different from the optical properties of the first electrode layer 120 (light emitting region) and the optical properties of the relaxation layer 150 (most of the non-light emitting region). For this reason, it is preferable that the width of the insulating groove 160 is small.
- the width L of the insulating groove 160 is 1.5 mm or less, for example. This width means a width that cannot be identified when a person with a visual acuity of 1.0 is separated by a certain distance (for example, 5 m) or more based on the Landolt ring.
- the organic EL element 10 includes a light-transmitting substrate 100 and a pair of first electrode layers 120 that are stacked above the substrate 100 and at least one of which has light-transmitting properties. And the second electrode layer 130 and the planar light emitting layer 140 provided between the pair of the first electrode layer 120 and the second electrode layer 130, and the first electrode layer 120 is disposed in the first region 11 in plan view.
- the organic EL element 10 further has optical characteristics with respect to predetermined light of the first region 11 and the second region 12 arranged in the second region 12 adjacent to the first region 11 in plan view. And a relaxation layer 150 for relaxing the difference.
- the first region 11 is a light emitting region
- the second region 12 is a non-light emitting region.
- FIG. 3 is a diagram showing a lighting example and a light-off example of the organic EL element 10 according to the present embodiment.
- the first region 11 in the shape of an arrow emits light during light emission.
- the difference in optical characteristics between the first region 11 (light-emitting region) and the second region 12 (non-light-emitting region) is alleviated. Therefore, as shown in FIG.
- the pattern, that is, the shape of the first region 11 can be made difficult to see.
- the relaxation layer 150 relaxes the difference in optical characteristics between the first region 11 (light emitting region) and the second region 12 (non-light emitting region), it is possible to suppress the appearance of the light emitting pattern when no light is emitted. be able to. Accordingly, it is possible to show a natural light emitting surface when not emitting light, that is, a flat surface without a sense of incongruity without seeing a light emitting pattern or the like.
- the relaxation layer 150 relaxes the phase difference of the optical length of the first region 11 and the second region 12 with respect to predetermined light.
- the relaxation layer 150 relaxes the phase difference of the optical length between the light emitting region and the non-light emitting region, it is possible to suppress the appearance of an interference fringe pattern between the light emitting region and the non-light emitting region. Can do.
- the relaxation layer 150 relaxes the absorption spectrum difference for the predetermined light between the first region 11 and the second region 12.
- the relaxation layer 150 relaxes the absorption spectrum difference between the light emitting region and the non-light emitting region, it is possible to suppress the appearance of a color difference between the light emitting region and the non-light emitting region.
- the relaxation layer 150 is provided in the same layer as the first electrode layer 120.
- the relaxing layer 150 can be formed in the same process as the first electrode layer 120, the manufacturing process can be facilitated and the manufacturing cost can be reduced.
- the relaxing layer 150 is made of the same material and the same film thickness as the first electrode layer 120.
- the relaxation layer 150 has the same material and the same film thickness as the first electrode layer 120, the optical characteristics can be easily made the same.
- an insulating groove 160 is provided between the first electrode layer 120 and the relaxing layer 150.
- the relaxation layer 150 and the first electrode layer 120 can be insulated, it is possible to prevent power supplied to the first electrode layer 120 from being supplied to the relaxation layer 150.
- the width of the insulating groove 160 is 1.5 mm or less.
- the insulating groove 160 cannot be identified. Therefore, a more natural light emitting surface can be shown when no light is emitted.
- the relaxing layer 150 reduces the difference in optical characteristics between the first region 11 and the second region 12 with respect to predetermined light to 15% or less.
- FIG. 4 is a cross-sectional view showing the organic EL element 20 according to the present embodiment.
- the organic EL element 20 according to the present embodiment is different from the organic EL element 10 shown in FIG. 2 in that an insulating layer 261 is newly provided. Below, it demonstrates focusing on a different point.
- the insulating layer 261 is provided in the insulating groove 160.
- the insulating layer 261 is provided so as to fill the insulating groove 160.
- the insulating layer 261 has a light-transmitting property and is made of, for example, an insulating resin material such as polyimide or acrylic.
- the insulating layer 261 is formed by applying an insulating resin such as polyimide to the insulating groove 160 and curing it by heating or the like.
- the insulating layer 261 may be silicon oxide or silicon nitride.
- the insulating layer 261 is formed by, for example, forming a silicon oxide film and patterning it by plasma CVD (Chemical Vapor Deposition) or the like.
- the insulating layer 261 has substantially the same optical characteristic difference from the first region 11. Specifically, the insulating layer 261 has substantially the same optical phase retardation and absorption spectrum difference with respect to predetermined light as the first electrode layer 120. That is, the insulating layer 261 relaxes the optical length phase difference and the absorption spectrum difference between the first electrode layer 120 and the insulating layer 261, similarly to the relaxing layer 150. Specifically, the thickness and material of the insulating layer 261 are determined in the same manner as the relaxation layer 150.
- the optical length phase difference and the absorption spectrum difference with respect to predetermined light provided in the insulating groove 160 are substantially the same as those of the first electrode layer 120.
- An insulating layer 261 is provided.
- the difference in optical characteristics between the insulating layer 261 and the first region 11 (light emitting region) can be almost eliminated, it is possible to suppress the appearance of the shape of the insulating layer 261 when no light is emitted. Therefore, a more natural light emitting surface can be shown when no light is emitted.
- FIG. 5A is a cross-sectional view showing an organic EL element 30 according to the present embodiment.
- the organic EL element 30 according to the present embodiment is different from the organic EL element 10 shown in FIG. 2 in that a light scattering portion 370 is newly provided. Below, it demonstrates focusing on a different point.
- the light scattering portion 370 is provided at a boundary portion between the first region 11 (light emitting region) and the second region 12 (non-light emitting region) in plan view. Specifically, the light scattering portion 370 is provided in a region overlapping the insulating groove 160 in plan view. For example, as shown in FIG. 5A, the light scattering portion 370 is formed on the entire light emitting surface side of the substrate 100. That is, the light scattering portion 370 is formed in the entire region of the light emitting region and the non-light emitting region.
- the light scattering unit 370 scatters the light passing therethrough.
- the light scattering portion 370 is a light diffusing sheet or a light diffusing film having irregularities on the surface.
- the light scattering portion 370 may be formed by applying a texture to the light emitting surface of the substrate 100.
- the light scattering portion 370 may be formed by mixing light scattering particles or the like in the substrate 100.
- the organic EL element 30 further includes the light scattering portion 370 provided at the boundary between the first region 11 and the second region 12 in plan view.
- the light scattering unit 370 scatters the light at the boundary between the light emitting region and the non-light emitting region, so that the difference in optical characteristics at the boundary can be made inconspicuous. Therefore, a more natural light emitting surface can be shown when no light is emitted.
- FIG. 5B is a cross-sectional view showing an organic EL element 31 according to another example of the present embodiment.
- the organic EL element 31 according to the present modification is different from the organic EL element 10 shown in FIG. 2 in that a light scattering portion 370 and a planarizing film 380 are newly provided. ing.
- the planarization film 380 is an insulating film having a flat upper surface. Further, the planarization film 380 has a light-transmitting property.
- the planarization film 380 is made of an insulating resin material such as polyimide or acrylic.
- the planarization film 380 is formed by applying an insulating resin material on the substrate 100 and curing it by heating or the like.
- planarization film 380 By providing the planarization film 380, unevenness due to the light scattering portion 370 can be planarized, and the first electrode layer 120, the relaxation layer 150, the planar light emitting layer 140, and the like can be formed with high accuracy. That is, the planar light emitting layer 140 with good film quality and the like can be formed.
- the light scattering portion 370 scatters the light at the boundary between the light emitting region and the non-light emitting region, so that the difference in optical characteristics at the boundary can be made inconspicuous. Therefore, a more natural light emitting surface can be shown when no light is emitted.
- FIG. 6 is a cross-sectional view showing the organic EL element 40 according to the present embodiment.
- the organic EL element 40 according to the present embodiment is different from the organic EL element 10 shown in FIG. 2 in that a second electrode layer 430 is provided instead of the second electrode layer 130. ing. Below, it demonstrates focusing on a different point.
- the second electrode layer 430 is different from the second electrode layer 130 in that it has translucency.
- the second electrode layer 430 is made of a transparent conductive material that transmits at least part of visible light.
- the second electrode layer 430 is made of, for example, indium tin oxide (ITO), IZO, AZO, or the like.
- the second electrode layer 430 may be a thin metal film such as silver or aluminum that can transmit light. Ag nanowires and Ag particles may be dispersed.
- a conductive polymer such as PEDOT or polyaniline, a conductive polymer doped with any acceptor, or a conductive light-transmitting material such as a carbon nanotube is used. it can.
- the second electrode layer 430 is formed by forming a transparent conductive film on the planar light emitting layer 140 by vapor deposition, coating, sputtering, or the like.
- the substrate 110 is also translucent. In the case of translucency, the shape of the first region 11 at the time of non-light emission can be easily seen, so that the effect of reducing the difference in optical characteristics is further increased.
- both the first electrode layer 120 and the second electrode layer 430 have translucency.
- FIG. 7 is a diagram showing a lighting example of the organic EL element 40 according to the present embodiment.
- the light emitting region emits light from either the front surface or the back surface of the organic EL element 40.
- the organic EL element 40 can be used for a building window or the like. That is, it can be used as a normal “window” when not emitting light, and can be used as a signage lamp or digital signage for information presentation, etc. by emitting light in a predetermined shape when emitting light.
- FIG. 8 is a cross-sectional view showing the organic EL element 50 according to the present embodiment.
- the organic EL element 50 has a relaxation layer 550 instead of the relaxation layer 150 as compared with the organic EL element 10 shown in FIG. The difference is that it is not provided. Below, it demonstrates focusing on a different point.
- the relaxing layer 550 is made of an insulating material.
- the relaxation layer 550 is different from the relaxation layer 150 in that it is made of an insulating material.
- the function of the relaxing layer 550 is the same as that of the relaxing layer 150.
- the relaxation layer 550 is made of a material different from that of the first electrode layer 120. Therefore, as described in Embodiment 1, the thickness of the relaxation layer 550 is determined in accordance with the refractive index of the material used for the relaxation layer 550.
- the relaxing layer 550 is made of an insulating material.
- the insulating groove 160 does not need to be provided, the shape of the insulating groove 160 cannot be seen when no light is emitted. Therefore, a more natural light emitting surface can be shown when no light is emitted.
- FIG. 9 is a diagram showing an illumination device 600 according to the present embodiment.
- the illumination device 600 includes an organic EL element 60, a first power supply circuit 610, and a second power supply circuit 620.
- the first region 11 and the second region 12 are regions that can emit light independently of each other. That is, not only the first region 11 but also the second region 12 is a light emitting region of the organic EL element 60.
- the organic EL element 60 is different from the organic EL element 10 shown in FIGS. 1A and 2 in that a terminal portion 151 is newly provided. Below, it demonstrates focusing on a different point.
- the terminal portion 151 is provided on the substrate 100.
- the terminal portion 151 is a lead electrode for supplying power to the relaxation layer 150.
- the relaxation layer 150 is made of a conductive material, and is made of, for example, the same material and the same film thickness as the first electrode layer 120.
- the terminal portion 151 is provided so that a part of the relaxing layer 150 extends.
- the terminal portion 151 is formed by patterning the conductive film in the same process as the relaxing layer 150. Therefore, the terminal part 151 is comprised with the material same as the relaxation layer 150, for example.
- the terminal part 151 may be comprised from another material by the process different from the relaxation layer 150. FIG.
- the terminal portion 151 may be formed simultaneously with the terminal portion 131.
- the relaxing layer 150 functions as a second anode of the planar light emitting layer 140 (note that the first electrode layer 120 is the first anode).
- the relaxation layer 150 By supplying power to the relaxation layer 150, the region where the relaxation layer 150 is provided, that is, the second region 12 can emit light.
- the first power supply circuit 610 is provided between the terminal portion 121 and the terminal portion 131.
- the first power supply circuit 610 is a DC current source or a DC voltage source connected to the terminal unit 121 and the terminal unit 131, and applies a predetermined voltage or current between the first electrode layer 120 and the second electrode layer 130. Apply. Thereby, the region where the first electrode layer 120 is provided, that is, the first region 11 can emit light.
- the second power supply circuit 620 is provided between the terminal portion 151 and the terminal portion 131.
- the second power supply circuit 620 is a DC current source or a DC voltage source connected to the terminal unit 151 and the terminal unit 131, and applies a predetermined voltage or current between the relaxation layer 150 and the second electrode layer 130. .
- the second region 12 can emit light.
- the first power supply circuit 610 and the second power supply circuit 620 can operate independently of each other. Therefore, each of the first region 11 and the second region 12 can be caused to emit light independently at an arbitrary timing.
- FIG. 10 is a diagram illustrating a lighting example of the illumination device 600 according to the present embodiment.
- only the first power supply circuit 610 can supply power so that only the first region 11 can emit light.
- only the second power supply circuit 620 can supply power so that only the second region 12 can emit light.
- the first region 11 and the second region 12 are regions that can emit light independently of each other.
- the area to emit light it is possible to change the area to emit light according to the situation. Since the shape of the first region 11 itself is not changed, the same shape (for example, an arrow) can be recognized when any of the first region 11 and the second region 12 is caused to emit light.
- first region 11 and the second region 12 may emit light simultaneously.
- first region 11 and the second region 12 may emit light with different colors or different light intensities.
- positioning of the terminal parts 121, 131, and 151 shown in FIG. 9 is only an example, and is not restricted to this.
- all of the terminal portions 121, 131, and 151 may be provided on the same side.
- one first electrode layer 120 that is, one light emitting region is provided in the plane.
- the organic EL element according to one embodiment of the present invention may include a plurality of first electrode layers 120. In other words, a plurality of symbols or characters such as arrows may be provided to emit light.
- the present invention is not limited thereto.
- the second electrode layer 130 may be patterned into a predetermined shape, and the first electrode layer 120 may be formed on the entire surface.
- the relaxing layer 150 may be provided in the same layer as the second electrode layer 130. That is, the relaxing layer 150 may be provided in the same layer as one of the pair of first electrode layer 120 and second electrode layer 130.
- the relaxation layer 150 may be provided in a layer different from the first electrode layer 120.
- the relaxing layer 150 may be provided between the planar light emitting layer 140 and the second electrode layer 130.
- the relaxing layer 150 may be provided outside the substrate 100 and the substrate 110.
- the width of the insulating groove 160 is 1.5 mm or less has been described, but the present invention is not limited thereto.
- the insulating groove 160 is not conspicuous even if the width of the insulating groove 160 is larger than 1.5 mm.
- the width of the insulating groove 160 may be larger than 1.5 mm.
- the difference in optical characteristics may be 15% or more.
- the lighting device 600 that emits light from both the first region 11 and the second region 12 has been described. However, for example, only the first region 11 as in Embodiments 1 to 5 is described. Is a light emitting region, the lighting device 600 may include only the first power supply circuit 610.
- the first electrode layer 120 is the anode and the second electrode layer 130 is the cathode is shown, but the reverse may be possible. That is, the first electrode layer 120 may be a cathode and the second electrode layer 130 may be an anode.
- planar view shape of the organic EL element may be a closed shape drawn by a straight line or a curve, such as a polygon, a circle, or an ellipse.
- the embodiment can be realized by arbitrarily combining the components and functions in each embodiment without departing from the scope of the present invention, or a form obtained by subjecting each embodiment to various modifications conceived by those skilled in the art. Forms are also included in the present invention.
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Electroluminescent Light Sources (AREA)
- Planar Illumination Modules (AREA)
- Illuminated Signs And Luminous Advertising (AREA)
Abstract
Description
本発明者は、「背景技術」の欄において記載した有機EL素子及び照明装置に関し、以下の問題が生じることを見出した。
[有機EL素子]
まず、本発明の実施の形態1に係る有機EL素子(平面発光体)について、図1A、図1B及び図2を用いて説明する。図1A及び図1Bはそれぞれ、本実施の形態に係る有機EL素子10を示す上面図及び下面図である。図2は、本実施の形態に係る有機EL素子10を示す断面図である。なお、図1Bは、有機EL素子10を下方から見た図であるが、基板100を示していない。また、図2は、図1A及び図1BにおけるA-A断面を示している。
基板100及び110は、互いの主面が対向するように設けられた一対の基板である。
第1電極層120及び第2電極層130は、基板100の上方に積層された、少なくとも一方が透光性を有する一対の電極層である。
平面発光層140は、一対の第1電極層120及び第2電極層130間に設けられる発光ユニットの一例である。平面発光層140は、第1電極層120及び第2電極層130間に電圧が印加されることで、面状に発光する。具体的には、平面発光層140のうち発光領域、すなわち、第1領域11のみが発光する。
緩和層150は、第2領域12に配置され、第1領域11と第2領域12との、所定の光に対する光学特性の差(光学コントラスト)を緩和する。具体的には、緩和層150は、緩和層150が設けられていない場合に比べて、有機EL素子10の第1領域11(発光領域)と第2領域12(非発光領域)との、所定の光に対する光学特性の差を緩和する。緩和層150は、発光領域には設けられず、非発光領域のみに設けられている。
光学長は、光学特性の1つである。緩和層150は、第1領域11と第2領域12との、所定の光に対する光学長の位相差を緩和する。具体的には、緩和層150は、発光領域と非発光領域との光学長の位相差を緩和する。発光領域と非発光領域との光学長の位相差は、第1電極層120の光学長と緩和層150の光学長との位相差に相当する。
吸収スペクトルは、光学特性の1つである。緩和層150は、第1領域11と第2領域12との、所定の光に対する吸収スペクトル差を緩和する。具体的には、緩和層150は、発光領域と非発光領域との吸収スペクトル差を緩和する。発光領域と非発光領域との吸収スペクトル差は、第1電極層120の吸収スペクトルと緩和層150の吸収スペクトルとの差に相当する。緩和層150は、第1電極層120との吸収スペクトル差を緩和する。
絶縁溝160は、第1電極層120と緩和層150との間に設けられた溝である。絶縁溝160は、第1電極層120と緩和層150とを離間させることで、電気的に絶縁している。これにより、端子部121から給電される電力が、緩和層150に供給されることを防止することができる。つまり、これにより、第1電極層120のみが発光領域を形成する。
以上のように、本実施の形態に係る有機EL素子10は、透光性を有する基板100と、基板100の上方に積層された、少なくとも一方が透光性を有する一対の第1電極層120及び第2電極層130と、一対の第1電極層120及び第2電極層130間に設けられた平面発光層140とを備え、第1電極層120は、平面視における第1領域11に配置されており、有機EL素子10は、さらに、平面視において第1領域11に隣接する第2領域12に配置された、第1領域11と第2領域12との、所定の光に対する光学特性の差を緩和するための緩和層150とを備える。また、例えば、第1領域11は、発光領域であり、第2領域12は、非発光領域である。
続いて、本発明の実施の形態2に係る有機EL素子について、図4を用いて説明する。図4は、本実施の形態に係る有機EL素子20を示す断面図である。
続いて、本発明の実施の形態3に係る有機EL素子について、図5Aを用いて説明する。図5Aは、本実施の形態に係る有機EL素子30を示す断面図である。
続いて、本発明の実施の形態4に係る有機EL素子について、図6を用いて説明する。図6は、本実施の形態に係る有機EL素子40を示す断面図である。
続いて、本発明の実施の形態5に係る有機EL素子について、図8を用いて説明する。図8は、本実施の形態に係る有機EL素子50を示す断面図である。
続いて、本発明の実施の形態6に係る照明装置について、図9を用いて説明する。図9は、本実施の形態に係る照明装置600を示す図である。
以上、本発明に係る有機EL素子及び照明装置について、上記実施の形態に基づいて説明したが、本発明は、上記の実施の形態に限定されるものではない。
11 第1領域
12 第2領域
100、110 基板
120 第1電極層
130、430 第2電極層
140 平面発光層
150、550 緩和層
160 絶縁溝
261 絶縁層
370 光散乱部
600 照明装置
Claims (15)
- 有機EL素子であって、
透光性を有する基板と、
前記基板の上方に積層された、少なくとも一方が透光性を有する一対の電極層と、
前記一対の電極層間に設けられた平面発光層とを備え、
前記一対の電極層の一方は、平面視における第1領域に配置されており、
前記有機EL素子は、さらに、
平面視において前記第1領域に隣接する第2領域に配置された、前記第1領域と前記第2領域との、所定の光に対する光学特性の差を緩和するための緩和層とを備える
有機EL素子。 - 前記緩和層は、前記第1領域と前記第2領域との、前記所定の光に対する光学長の位相差を緩和する
請求項1に記載の有機EL素子。 - 前記緩和層は、前記第1領域と前記第2領域との、前記所定の光に対する吸収スペクトル差を緩和する
請求項1又は2に記載の有機EL素子。 - 前記緩和層は、前記一対の電極層の一方と同層に設けられている
請求項1~3のいずれか1項に記載の有機EL素子。 - 前記緩和層は、前記一対の電極層の一方と同一の材料、かつ、同一の膜厚で構成されている
請求項4に記載の有機EL素子。 - 前記一対の電極層の一方と前記緩和層との間には、絶縁溝が設けられている
請求項4又は5に記載の有機EL素子。 - 前記有機EL素子は、さらに、前記絶縁溝に設けられた、前記所定の光に対する光学長の位相差及び吸収スペクトル差が前記一対の電極層の一方と略同一の絶縁層を備える
請求項6に記載の有機EL素子。 - 前記絶縁溝の幅は、1.5mm以下である
請求項6又は7に記載の有機EL素子。 - 前記緩和層は、前記第1領域と前記第2領域との、所定の光に対する光学特性の差を15%以下に緩和する
請求項1~8のいずれか1項に記載の有機EL素子。 - 前記有機EL素子は、さらに、平面視において、前記第1領域と前記第2領域との境界部分に設けられた光散乱部を備える
請求項1~9のいずれか1項に記載の有機EL素子。 - 前記一対の電極層の両方が、透光性を有する
請求項1~10のいずれか1項に記載の有機EL素子。 - 前記第1領域は、発光領域であり、
前記第2領域は、非発光領域である
請求項1~11のいずれか1項に記載の有機EL素子。 - 前記緩和層は、絶縁性材料から構成される
請求項12に記載の有機EL素子。 - 前記第1領域及び前記第2領域は、互いに独立して発光可能な領域である
請求項1~11のいずれか1項に記載の有機EL素子。 - 請求項1~14のいずれか1項に記載の有機EL素子を備える照明装置。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2016512577A JPWO2015155924A1 (ja) | 2014-04-08 | 2015-02-27 | 有機el素子及び照明装置 |
US15/127,238 US10243028B2 (en) | 2014-04-08 | 2015-02-27 | Organic electroluminescent element and lighting device with buffer layer |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2014079680 | 2014-04-08 | ||
JP2014-079680 | 2014-04-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2015155924A1 true WO2015155924A1 (ja) | 2015-10-15 |
Family
ID=54287518
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2015/001040 WO2015155924A1 (ja) | 2014-04-08 | 2015-02-27 | 有機el素子及び照明装置 |
Country Status (3)
Country | Link |
---|---|
US (1) | US10243028B2 (ja) |
JP (1) | JPWO2015155924A1 (ja) |
WO (1) | WO2015155924A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2017217111A1 (ja) * | 2016-06-14 | 2017-12-21 | コニカミノルタ株式会社 | 発光モジュール |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61146894U (ja) * | 1985-03-04 | 1986-09-10 | ||
JPH0652990A (ja) * | 1992-07-28 | 1994-02-25 | Nippondenso Co Ltd | エレクトロルミネッセンス素子 |
WO2001078461A1 (fr) * | 2000-04-06 | 2001-10-18 | Seiko Epson Corporation | Dispositif el organique et panneau d'affichage |
JP2012134312A (ja) * | 2010-12-21 | 2012-07-12 | Denso Corp | 有機el表示装置 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3446301A1 (de) | 1984-12-19 | 1986-06-19 | Degussa Ag, 6000 Frankfurt | Verfahren zur delignifizierung von sulfatzellstoffen |
JP3560375B2 (ja) | 1994-12-27 | 2004-09-02 | 出光興産株式会社 | 有機エレクトロルミネセンス素子 |
WO1996034514A1 (fr) * | 1995-04-25 | 1996-10-31 | Citizen Watch Co., Ltd. | Dispositif d'electroluminescence organique |
JP2000231985A (ja) | 1999-02-12 | 2000-08-22 | Denso Corp | 有機el素子 |
JP2007094165A (ja) | 2005-09-29 | 2007-04-12 | Tohoku Pioneer Corp | 表示装置 |
US7911133B2 (en) * | 2007-05-10 | 2011-03-22 | Global Oled Technology Llc | Electroluminescent device having improved light output |
JP4968471B2 (ja) | 2007-10-11 | 2012-07-04 | 大日本印刷株式会社 | 発光型有機el表示パネル |
JP5173871B2 (ja) | 2009-01-29 | 2013-04-03 | エルジー ディスプレイ カンパニー リミテッド | 有機elディスプレイ |
GB201105582D0 (en) | 2011-04-01 | 2011-05-18 | Cambridge Display Tech Ltd | Organic light-emitting device and method |
US20140246664A1 (en) * | 2011-10-18 | 2014-09-04 | Toppan Printing Co., Ltd. | Organic electroluminescence display panel and manufacturing method therefor |
-
2015
- 2015-02-27 WO PCT/JP2015/001040 patent/WO2015155924A1/ja active Application Filing
- 2015-02-27 JP JP2016512577A patent/JPWO2015155924A1/ja active Pending
- 2015-02-27 US US15/127,238 patent/US10243028B2/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61146894U (ja) * | 1985-03-04 | 1986-09-10 | ||
JPH0652990A (ja) * | 1992-07-28 | 1994-02-25 | Nippondenso Co Ltd | エレクトロルミネッセンス素子 |
WO2001078461A1 (fr) * | 2000-04-06 | 2001-10-18 | Seiko Epson Corporation | Dispositif el organique et panneau d'affichage |
JP2012134312A (ja) * | 2010-12-21 | 2012-07-12 | Denso Corp | 有機el表示装置 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2017217111A1 (ja) * | 2016-06-14 | 2017-12-21 | コニカミノルタ株式会社 | 発光モジュール |
Also Published As
Publication number | Publication date |
---|---|
US10243028B2 (en) | 2019-03-26 |
US20170110523A1 (en) | 2017-04-20 |
JPWO2015155924A1 (ja) | 2017-04-13 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP6542867B2 (ja) | 表示装置 | |
KR101990312B1 (ko) | 유기전계발광표시장치 및 그 제조방법 | |
TWI601283B (zh) | Display device | |
TWI544471B (zh) | 發光模組及照明模組 | |
TWI506835B (zh) | 有機發光二極體、包含其之顯示面板及顯示裝置 | |
TWI667782B (zh) | 有機發光二極體顯示面板及包含其之有機發光二極體顯示裝置 | |
KR101461780B1 (ko) | 유기 전계 발광 소자 및 조명 장치 | |
JP5703251B2 (ja) | 有機電界発光素子、照明装置及び有機電界発光素子の製造方法 | |
KR102540135B1 (ko) | 유기발광표시장치 | |
TWI693708B (zh) | 透明顯示面板 | |
US10224379B2 (en) | Organic light emitting diode device with different laminated structures | |
TW201806141A (zh) | 顯示裝置 | |
JP2015109190A (ja) | 有機エレクトロルミネッセンス表示装置 | |
WO2018188354A1 (zh) | 光源面板和显示装置 | |
JP2015158981A (ja) | 有機エレクトロルミネッセンス素子及び照明装置 | |
CN106024835A (zh) | 一种透明显示面板及其制备方法 | |
JP2013073800A (ja) | 表示装置 | |
US20240168328A1 (en) | Hybrid display device and spliced display device | |
CN108417725A (zh) | 发光器件、显示基板 | |
JP5572693B2 (ja) | 高い明度を有する、透明な有機発光デバイス | |
WO2015155925A1 (ja) | 平面発光体及び照明装置 | |
WO2015155924A1 (ja) | 有機el素子及び照明装置 | |
JP5854173B2 (ja) | 面発光ユニット | |
WO2015079912A1 (ja) | 面状発光ユニット | |
JP5136844B2 (ja) | バックライト及び液晶表示装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 15776899 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2016512577 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 15127238 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 15776899 Country of ref document: EP Kind code of ref document: A1 |