WO2015174006A1 - Élément électroluminescent organique et appareil d'éclairage - Google Patents

Élément électroluminescent organique et appareil d'éclairage Download PDF

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Publication number
WO2015174006A1
WO2015174006A1 PCT/JP2015/001730 JP2015001730W WO2015174006A1 WO 2015174006 A1 WO2015174006 A1 WO 2015174006A1 JP 2015001730 W JP2015001730 W JP 2015001730W WO 2015174006 A1 WO2015174006 A1 WO 2015174006A1
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Prior art keywords
plate
glass substrate
organic
light emitting
amount
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PCT/JP2015/001730
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English (en)
Japanese (ja)
Inventor
基晋 青木
浩史 久保田
展幸 宮川
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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 WO2015174006A1 publication Critical patent/WO2015174006A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S2/00—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V3/00—Globes; Bowls; Cover glasses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V3/00—Globes; Bowls; Cover glasses
    • F21V3/04—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings
    • 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
    • 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
    • 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]
    • H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers

Definitions

  • the present invention relates to an organic EL (Electro-Luminescence) element, and a lighting apparatus including the organic EL element.
  • organic EL Electro-Luminescence
  • Organic EL elements are useful as flexible light emitting devices. For this reason, conventionally, various devices using organic EL elements, for example, illumination devices and display devices using organic EL elements have been developed.
  • the organic EL element includes a thin glass substrate, a pair of electrodes stacked on the glass substrate, and a light emitting layer provided between the pair of electrodes.
  • Patent Document 1 discloses an electro-optical device substrate provided with an amorphous carbon film as a protective layer on the non-element formation surface side of the substrate material.
  • the present invention provides a flexible and flexible organic EL element and a lighting device.
  • an organic EL device includes a first plate, a flexible first glass substrate laminated on the main surface of the first plate, and organic light emission. And the breaking stress of the first plate is greater than the breaking stress of the first glass substrate, and the amount of deflection of the first plate is less than the amount of deflection of the first glass substrate.
  • FIG. 1 is a schematic perspective view showing an organic EL element according to Embodiment 1 of the present invention.
  • FIG. 2 is a schematic plan view showing the positional relationship of members provided in the organic EL element according to Embodiment 1 of the present invention.
  • FIG. 3 is a schematic cross-sectional view showing the organic EL element according to Embodiment 1 of the present invention.
  • FIG. 4A is a diagram showing the amount of bending of the glass substrate according to Embodiment 1 of the present invention.
  • FIG. 4B is a view showing the amount of deflection of the plate according to Embodiment 1 of the present invention.
  • FIG. 5 is a schematic perspective view showing a plate according to Modification 1 of Embodiment 1 of the present invention.
  • FIG. 1 is a schematic perspective view showing an organic EL element according to Embodiment 1 of the present invention.
  • FIG. 2 is a schematic plan view showing the positional relationship of members provided in the organic EL element according to Embodiment 1 of the
  • FIG. 6A is a schematic cross-sectional view showing an organic EL element according to Variation 2 of Embodiment 1 of the present invention.
  • FIG. 6B is a schematic cross-sectional view showing an organic EL element according to Variation 2 of Embodiment 1 of the present invention.
  • FIG. 6C is a schematic cross-sectional view showing the organic EL element according to the second modification of the first embodiment of the present invention.
  • FIG. 7A is a schematic cross-sectional view showing an organic EL element according to Embodiment 2 of the present invention.
  • FIG. 7B is a schematic cross-sectional view showing another example of the organic EL element according to Embodiment 2 of the present invention.
  • FIG. 8A is a schematic cross-sectional view showing an elastic body according to Embodiment 2 of the present invention.
  • FIG. 8B is a schematic cross-sectional view showing another example of the elastic body according to Embodiment 2 of the present invention.
  • FIG. 8C is a schematic cross-sectional view showing another example of the elastic body according to Embodiment 2 of the present invention.
  • FIG. 9 is a schematic perspective view showing a lighting apparatus according to Embodiment 3 of the present invention.
  • FIG. 10 is a schematic cross-sectional view showing a part of the lighting apparatus according to Embodiment 3 of the present invention.
  • each drawing is a schematic view, and is not necessarily illustrated exactly. Moreover, in each figure, the same code
  • FIG. 1 is a schematic perspective view showing an organic EL element 10 according to the present embodiment.
  • FIG. 2 is a schematic plan view which shows the positional relationship of the member with which the organic EL element 10 which concerns on this Embodiment is provided.
  • FIG. 3 is a schematic cross-sectional view showing the organic EL element 10 according to the present embodiment.
  • FIG. 3 shows a cross section taken along line AA in FIG.
  • the organic EL element 10 is, for example, a substantially rectangular flat light emitter.
  • the organic EL element 10 emits light planarly in the upper direction or the lower direction in FIG. 1 or in both directions.
  • the organic EL element 10 includes a first glass substrate 100, a second glass substrate 110, an organic light emitting unit 120, a first plate 130, and a second plate 140.
  • the first plate 130, the first glass substrate 100, the organic light emitting unit 120, the second glass substrate 110, and the second plate 140 are stacked in this order.
  • the main surface of at least one of the first plate 130 and the second plate 140 is a light emitting surface of the organic EL element 10.
  • the first glass substrate 100 and the second glass substrate 110 have flexibility. Specifically, when a force is applied from the outside, the first glass substrate 100 and the second glass substrate 110 are bent. In other words, the first glass substrate 100 and the second glass substrate 110 bend when a force is applied. Details of the deflection will be described later with reference to FIGS. 4A and 4B.
  • At least one of the first glass substrate 100 and the second glass substrate 110 has translucency. Thereby, the light from the organic light emitting unit 120 can be extracted to the outside.
  • the first glass substrate 100 and the second glass substrate 110 are glass substrates such as soda glass and non-alkali glass.
  • the first glass substrate 100 and the second glass substrate 110 are made of the same material and have the same shape.
  • the plan view shapes of the first glass substrate 100 and the second glass substrate 110 are substantially rectangular as shown in FIG.
  • the first glass substrate 100 is stacked on the main surface of the first plate 130. Specifically, as shown in FIG. 3, the first glass substrate 100 is provided on the main surface of the first plate 130. An adhesive or the like may be provided between the first glass substrate 100 and the first plate 130.
  • the second glass substrate 110 is disposed to face the first glass substrate 100 with the organic light emitting unit 120 interposed therebetween.
  • the first glass substrate 100 and the second glass substrate 110 are disposed opposite to each other, for example, at a distance of 6 ⁇ m to 100 ⁇ m, for example 20 ⁇ m.
  • a filler (fill material) for sealing the organic light emitting unit 120 may be provided between the second glass substrate 110 and the first glass substrate 100.
  • sealing material is provided, for example, in the vicinity of the peripheral ends of the first glass substrate 100 and the second glass substrate 110 so as to surround the organic light emitting unit 120. That is, the sealing material is provided in a frame shape along the outer periphery of the first glass substrate 100 and the second glass substrate 110. Thus, the space surrounded by the first glass substrate 100, the second glass substrate 110, and the sealing material can be sealed.
  • a photocurable, thermosetting or two-component curable adhesive resin such as an epoxy resin, an acrylic resin, or a silicone resin
  • a thermoplastic adhesive resin such as polyethylene may be used.
  • the organic light emitting unit 120 is a light emitting unit that emits planar light when a voltage is applied.
  • the organic light emitting unit 120 includes a first electrode 121, an organic layer 122, and a second electrode 123, as shown in FIG. Specifically, the first electrode 121, the organic layer 122, and the second electrode 123 are stacked on the first glass substrate 100 in this order.
  • the shape in plan view of the organic light emitting unit 120 is substantially rectangular like the first glass substrate 100 and the second glass substrate 110.
  • the shape of the organic light emitting unit 120 in plan view is smaller than the first glass substrate 100 and the second glass substrate 110.
  • the above-described sealing material, extraction electrode, and the like are formed around the organic light emitting unit 120.
  • the first electrode 121 is an electrode provided on the light emitting surface side, and is provided, for example, on the first glass substrate 100.
  • the first electrode 121 is, for example, an anode, and has a potential higher than that of the second electrode 123 when the organic EL element 10 emits light.
  • the first electrode 121 is made of a light-transmitting conductive material.
  • the first electrode 121 is made of a transparent conductive material that transmits at least a part of visible light.
  • the first electrode 121 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 121 may be a thin film of metal such as silver or aluminum as long as light can be transmitted. Alternatively, Ag nanowires or Ag particles may be dispersed. Alternatively, as the first electrode 121, a conductive polymer such as PEDOT or polyaniline, a conductive polymer doped with an arbitrary acceptor, or a conductive light transmissive material such as a carbon nanotube can be used. .
  • the first electrode 121 is formed by depositing a transparent conductive film on the first glass substrate 100 by a vapor deposition method, a coating method, a sputtering method, an ion beam assist method, or the like and patterning the deposited transparent conductive film. Be done.
  • the film thickness of the first electrode 121 is 60 nm to 200 nm, and is 100 nm as an example.
  • the organic layer 122 is provided between the first electrode 121 and the second electrode 123.
  • the organic layer 122 includes a light emitting layer, and when a voltage is applied between the first electrode 121 and the second electrode 123, the organic layer 122 emits light in a planar manner.
  • the organic layer 122 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 122 such as a light emitting layer is made of, for example, an organic material such as diamine, anthracene, or a metal complex.
  • Each layer constituting the organic layer 122 is formed by a vapor deposition method, a spin coating method, a casting method, an ion beam assist method or the like.
  • the film thickness of the organic layer 122 is 150 nm to 350 nm, and for example, is 210 nm.
  • the organic layer 122 is formed by doping a red, green, and blue three-color dopant dye in the light emitting layer.
  • the organic layer 122 may have a laminated structure of a blue hole transporting light emitting layer, a green electron transporting light emitting layer, and a red electron transporting light emitting layer.
  • the organic layer 122 may have a multi-unit structure in which red, green, and blue light emitting units are stacked via an intermediate layer having light transparency and conductivity, and are electrically connected directly.
  • the second electrode 123 is an electrode provided on the side opposite to the light emitting surface, and is provided on the organic layer 122, for example.
  • the second electrode 123 is, for example, a cathode, and has a potential lower than that of the first electrode 121 when the organic EL element 10 emits light.
  • the second electrode 123 is made of a conductive material having light reflectivity.
  • the second electrode 123 reflects the light emitted from the organic layer 122 and emits the light to the light emitting surface side.
  • the second electrode 123 is made of, for example, aluminum, silver or magnesium, or an alloy containing at least one of them.
  • the second electrode 123 is formed by depositing a conductive film over the organic layer 122 by a vapor deposition method, a coating method, a sputtering method, an ion beam assist method, or the like.
  • the film thickness of the second electrode 123 is 20 nm to 200 nm, and is 100 nm as an example.
  • the second electrode 123 may be made of a light-transmitting conductive material.
  • the same material as the first electrode 121 can be used.
  • the organic EL element 10 is used as a double-sided light emitting type lighting device, for example, in windows of buildings or vehicles. can do.
  • the lead-out electrode (terminal part) for supplying electric power to the 1st electrode 121 and the 2nd electrode 123 on the 1st glass substrate 100, for example Provided.
  • the first lead-out electrode electrically connected to the first electrode 121 and the second electrode 123 are provided at a portion which is a peripheral end portion of the first glass substrate 100 and outside the sealing material.
  • An electrically connected second extraction electrode is provided.
  • the same material as the first electrode 121 or the second electrode 123 can be used as the first extraction electrode and the second extraction electrode.
  • the first plate 130 and the second plate 140 are disposed to face each other with the first glass substrate 100, the organic light emitting unit 120, and the second glass substrate 110 interposed therebetween.
  • the first plate 130 is provided on the main surface on the side opposite to the side on which the organic light emitting unit 120 is provided, of the two main surfaces of the first glass substrate 100.
  • the second plate 140 is provided on the main surface of the second glass substrate 110 opposite to the side on which the organic light emitting unit 120 is provided.
  • the first plate 130 is adhered to the first glass substrate 100 by an adhesive or the like
  • the second plate 140 is adhered to the second glass substrate 110 by an adhesive or the like.
  • the first plate 130 and the second plate 140 are protective members provided to suppress breakage of the first glass substrate 100 and the second glass substrate 110, respectively.
  • each of the first plate 130 and the second plate 140 is a single plate.
  • each of the first plate 130 and the second plate 140 is formed of a uniform single plate in which a hole or a recess is not formed.
  • the first plate 130 and the second plate 140 respectively cover the first glass substrate 100 and the second glass substrate continuously in plan and without gaps.
  • first plate 130 and the second plate 140 have flexibility. Therefore, the first plate 130 and the second plate 140 are bent when an external force is applied. Therefore, the entire organic EL element 10 can be bent.
  • At least one of the light extraction sides of the first plate 130 and the second plate 140 has translucency. Both the first plate 130 and the second plate 140 may have translucency.
  • the first plate 130 and the second plate 140 are made of, for example, a resin material.
  • a resin material for example, polyethylene terephthalate, polyethylene naphthalate, polyvinyl chloride, polycarbonate, polypropylene, polyethylene, polyimide or the like can be used.
  • the first plate 130 and the second plate 140 are formed by resin molding using a mold or the like.
  • the first plate 130 and the second plate 140 are made of, for example, the same material and have the same shape.
  • the planar view shape of the 1st board 130 and the 2nd board 140 is a substantially rectangle, as shown in FIG.
  • the first plate 130 and the second plate 140 respectively protrude outward from the first glass substrate 100 and the second glass substrate 110 in plan view.
  • the first plate 130 and the second plate 140 respectively have larger areas than the first glass substrate 100 and the second glass substrate 110 in plan view, and the first glass substrate 100 and the entire second glass substrate 110 are covered.
  • the first plate 130 and the second plate 140 are respectively slightly larger than the first glass substrate 100 and the second glass substrate 110.
  • the end portions of the first glass substrate 100 and the second glass substrate 110 can be protected.
  • only a part of the first plate 130 and the second plate 140 may protrude outward from the first glass substrate 100 and the second glass substrate 110. .
  • FIG. 4A is a diagram showing the amount of bending of the glass substrate according to the present embodiment.
  • FIG. 4B is a diagram showing the amount of deflection of the plate according to the present embodiment.
  • the amount of deflection of the first glass substrate 100 is determined based on the thickness of the first glass substrate 100, the Young's modulus of the material constituting the first glass substrate 100, and a predetermined force applied in the thickness direction.
  • the amount of deflection of the first plate 130 is determined based on the thickness of the first plate 130, the Young's modulus of the material forming the first plate 130, and a predetermined force applied in the thickness direction.
  • the amount of bending of the first glass substrate 100 and the amount of bending of the first plate 130 do not bend when they are bonded together, but bend when a predetermined force is applied to them as separate independent members. Amount.
  • Equation (1) is an equation for calculating the deflection amount f c of the cantilever.
  • E is the Young's modulus of the material which comprises a member. Young's modulus is a fixed value depending on the material.
  • P is the pushing pressure. Specifically, as shown in FIGS. 4A and 4B, it is a pressure that pushes the other end of the member fixed at one end in the thickness direction of the member. In the example of FIGS. 4A and 4B, the left ends of the first glass substrate 100 and the first plate 130 are fixed.
  • A is the length of the member.
  • the length of the member is the distance from the fixed end of the member to the other end.
  • I is a cross-sectional second moment, which is determined based on (Equation 2) below.
  • Equation (2) b is the width of the member, and t is the thickness of the member.
  • the deflection amount f c2 of the first plate member 130 is smaller than the deflection amount f c1 of the first glass substrate 100.
  • the size (length, width, thickness) and material (Young's modulus) of the members are designed so that the amount of deflection of the first plate 130 is smaller than the amount of deflection of the first glass substrate 100,
  • the first plate 130 and the first glass substrate 100 are used.
  • the size and the material of the first plate 130 are selected according to the size and the material of the member used as the first glass substrate 100.
  • the material and thickness used as the first plate 130 are appropriately selected.
  • the first glass substrate 100 For example, a case where a glass having a Young's modulus E of 73 GPa, a width b of 50 mm, a length a of 200 mm and a thickness t of 50 ⁇ m will be described as the first glass substrate 100.
  • deflection amount f c1 of the first glass substrate 100 is as follows.
  • the sectional moment of inertia I 1 is It becomes.
  • the deflection amount f c1 is It becomes. Therefore, the first plate 130 may be designed to have a deflection amount smaller than the deflection amount fc1 of the first glass substrate 100.
  • the deflection amount f c2 of the first plate 130 is as follows Become.
  • the sectional second moment I 2 is It becomes.
  • the deflection amount f c2 is It becomes. Accordingly, deflection of f c2 of the first plate member 130 is smaller than the deflection of f c1 of the first glass substrate 100.
  • the thickness of the first plate 130 can be increased. The single plate 130 can be made more difficult to bend than the first glass substrate 100.
  • the size and material of the second plate 140 may be designed so that the amount of deflection of the second plate 140 is also smaller than that of the second glass substrate 110.
  • the first glass substrate 100 is more easily bent than the first plate 130 because the amount of bending is larger than that of the first plate 130. That is, the first plate 130 is more difficult to bend than the first glass substrate 100.
  • the second glass substrate 110 is easier to bend than the second plate 140, in other words, the second plate 140 is more difficult to bend than the second glass substrate 110.
  • the organic EL element 10 can be bent at a large radius, that is, flexible, but can suppress bending at a locally small radius and can be hard to be broken.
  • the Young's modulus of the first glass substrate 100 and the second glass substrate 110 is 70 GPa to 80 GPa, and is 73 GPa as an example.
  • the thickness of the first glass substrate 100 and the second glass substrate 110 is 20 ⁇ m to 100 ⁇ m, and is 50 ⁇ m as an example.
  • the lengths of the first glass substrate 100 and the second glass substrate 110 are 50 mm to 2000 mm, for example, 200 mm.
  • the width of the first glass substrate 100 and the second glass substrate 110 is 5 mm to 1500 mm, for example, 50 mm.
  • the Young's modulus of the first plate 130 and the second plate 140 is 1 GPa to 5 GPa, and is 4.3 GPa as an example.
  • the thickness of the first plate 130 and the second plate 140 is 100 ⁇ m to 1000 ⁇ m, for example 500 ⁇ m.
  • the lengths of the first plate 130 and the second plate 140 are 50 mm to 2000 mm, for example, 200 mm.
  • the width of the first plate 130 and the second plate 140 is 5 mm to 1,500 mm, and is 50 mm as an example.
  • the bending amount in a cantilever was demonstrated as a definition of bending amount, it does not restrict to this. It may be a deflection amount when both ends are fixed or when both ends are supported.
  • the force (central load) which presses one point was demonstrated also about predetermined
  • breaking stress is a limit stress that can hold the member without being broken (broken) by external force. Therefore, the greater the breaking stress of the member, the less likely it is the member to be broken.
  • the breaking stress of the first plate 130 is larger than the breaking stress of the first glass substrate 100. Further, the breaking stress of the second plate 140 is larger than the breaking stress of the second glass substrate 110. Therefore, the first plate 130 is less likely to be broken than the first glass substrate 100, and the second plate 140 is less likely to be broken than the second glass substrate 110. That is, in the present embodiment, the fragile glass substrate is protected by a non-breakable plate.
  • the tensile stress ⁇ is expressed by the following (Expression 3).
  • E is the Young's modulus of the material which comprises a member
  • t is the thickness of a member
  • the fracture stress of the first glass substrate 100 is 50 MPa and the fracture stress of the first plate 130 is 230 MPa will be described as an example.
  • the tensile stress of the outer peripheral surface of each of the first glass substrate 100 and the first plate 130 bonded together and bent at a radius of 0.036 m is as follows.
  • the first plate 130 is effective as a protection portion of the first glass substrate 100. That is, even when the first glass substrate 100 is broken, the first plate 130 is not broken when bent at a predetermined radius, so that the outer shape of the organic EL element 10 can be maintained.
  • the fracture stress of the first glass substrate 100 and the second glass substrate is 5 MPa to 150 MPa, for example, 50 MPa.
  • the fracture stress of the first plate 130 and the second plate 140 is 150 MPa to 1000 MPa, for example 230 MPa.
  • the organic EL element 10 includes the first plate 130 and the flexible first glass substrate 100 laminated on the main surface of the first plate 130 and the organic light emission.
  • the breaking stress of the first plate 130 is larger than the breaking stress of the first glass substrate 100, and the amount of bending of the first plate 130 is smaller than the amount of bending of the first glass substrate 100.
  • the first plate 130 is less likely to bend than the first glass substrate 100. Therefore, bending of the first glass substrate 100 can be suppressed locally.
  • the breaking stress of the first plate 130 is larger than the breaking stress of the first glass substrate 100, the first plate 130 is less likely to be broken than the first glass substrate 100.
  • the organic EL element 10 according to the present embodiment can be bent at a large radius, that is, flexible, but can suppress bending at a locally small radius and can be hard to be broken. That is, the organic EL element 10 according to the present embodiment can be used as a light emitter that is not easily broken and is flexible.
  • the amount of deflection of the first plate 130 is based on the thickness of the first plate 130, the Young's modulus of the material constituting the first plate 130, and the predetermined force applied in the thickness direction.
  • the deflection amount of the first glass substrate 100 is determined based on the thickness of the first glass substrate 100, the Young's modulus of the material forming the first glass substrate 100, and a predetermined force.
  • the amount of bending can be controlled by adjusting the thickness, and thus the degree of freedom in the design of the first plate 130 can be enhanced.
  • the organic EL element 10 further includes a flexible second glass substrate 110, a first glass substrate 100, and organic light emission, which are disposed to face the first glass substrate 100 with the organic light emitting unit 120 interposed therebetween. And a second plate 140 disposed opposite to the first plate 130 with the portion 120 and the second glass substrate 110 interposed therebetween.
  • the breaking stress of the second plate 140 is determined by the breaking stress of the second glass substrate 110.
  • the deflection amount of the second plate 140 is larger than the deflection amount of the second glass substrate 110.
  • the organic light emitting unit 120 can be exposed to moisture and the like in the air. It can be prevented. Therefore, the lifetime of the organic EL element 10 can be extended.
  • the first plate 130 is a single plate.
  • the first plate 130 is not a single plate, for example, when the first plate 130 is composed of two plates and there is a joint between the two plates, the first joint 130 The glass substrate 100 may be locally bent and broken. On the other hand, since the first plate 130 is formed of a single plate, there is no joint, and local bending of the first glass substrate 100 can be suppressed.
  • the first plate 130 protrudes outward from the first glass substrate 100 in a plan view.
  • the end of the first glass substrate 100 can be protected.
  • a certain object for example, a mounting body such as a lighting fixture
  • the object collides with the first plate 130 instead of the first glass substrate 100.
  • the breaking stress of the first plate 130 is larger than the breaking stress of the first glass substrate 100, the first plate 130 can protect the end of the first glass substrate 100.
  • FIG. 5 is a schematic perspective view showing a plate according to the present modification.
  • the 1st board 130 and the 2nd board 140 showed about the example which is a one-plate body, it does not restrict to this.
  • the first plate 130 and the second plate 140 may have a reinforcing structure.
  • the reinforcing structure has, for example, a structure that disperses stress.
  • the reinforcing structure is a structure in which one or more regularly arranged holes are formed in the plate.
  • one or more holes may be arranged in line symmetry or point symmetry to properly disperse stress.
  • the first plate 131 shown in FIG. 5 has a lattice-like reinforcing structure.
  • the grid parts are orthogonal to each other, and substantially rectangular holes are two-dimensionally arranged.
  • the first plate 131 is formed by resin molding using a mold or the like.
  • the first plate body 131 has a reinforcing structure.
  • the reinforcing structure is not limited to the lattice shown in FIG. 5, but may be, for example, a truss structure or a honeycomb structure.
  • FIGS. 6A to 6C are schematic cross-sectional views showing the organic EL elements 11 to 13 according to this modification.
  • Embodiment 1 demonstrated the structure provided with the 2nd glass substrate 110 for sealing the organic light emission part 120, it does not restrict to this. Like the organic EL elements 11 to 13 according to the present modification, the second glass substrate 110 and the second plate 140 may not be provided.
  • the organic EL element 11 illustrated in FIG. 6A does not include the second glass substrate 110 and the second plate body 140.
  • the first glass substrate 100 and the organic light emitting unit 120 are stacked on the main surface of the first plate 130 in this order.
  • a filler or the like is preferably provided so as to cover the organic light emitting unit 120.
  • the organic EL element 12 shown in FIG. 6B does not include the second glass substrate 110 and the second plate 140.
  • the first plate 130 is disposed to face the first glass substrate 100 with the organic light emitting unit 120 interposed therebetween.
  • the organic light emitting unit 120 and the first glass substrate 100 are stacked on the first plate 130 in this order. That is, the organic light emitting unit 120 is provided between the first glass substrate 100 and the first plate 130.
  • the organic EL element 13 shown to FIG. 6C does not equip the 2nd glass substrate 110 and the 2nd plate body 140 similarly.
  • the organic EL element 13 further includes a first plate 130a. That is, the organic EL element 13 includes the two first plate members 130 and 130a disposed to face each other.
  • the two first plates 130 and 130 a are disposed to face each other with the first glass substrate 100 and the organic light emitting unit 120 interposed therebetween.
  • the first glass substrate 100 and the organic light emitting unit 120 are provided between the two first plates 130 and 130a.
  • the organic EL elements 11 to 13 include the first glass substrate 100, the organic light emitting unit 120, and the first plate 130.
  • the stacking order of the first glass substrate 100, the organic light emitting unit 120, and the first plate 130 is not limited. That is, the first glass substrate 100 and the organic light emitting unit 120 may be sequentially stacked on the main surface of the first plate 130 (see FIG. 6A), or the organic light emitting unit may be stacked on the main surface of the first plate 130. 120 and the first glass substrate 100 may be laminated in order (see FIG. 6B).
  • two first plates may be provided on both sides of the first glass substrate 100 as first plates 130 and 130a (see FIG. 6C).
  • the organic EL elements 11 to 13 can be used as light emitters that are not easily broken and that are flexible.
  • FIG. 7A and 7B are schematic cross-sectional views showing the organic EL elements 20 and 21 according to the present embodiment.
  • the organic EL elements 20 and 21 according to the present embodiment newly include an elastic body 250.
  • the organic EL element 20 shown in FIG. 7A is different from the organic EL element 11 shown in FIG. 6A in that an elastic body 250 is newly provided.
  • the organic EL element 21 shown in FIG. 7B is different from the organic EL element 13 shown in FIG. 6C in that elastic members 250 and 260 are additionally provided. The following description will focus on the differences.
  • the elastic body 250 is provided between the first glass substrate 100 and the first plate 130.
  • the elastic body 250 is an adhesive for bonding the first glass substrate 100 and the first plate 130.
  • the elastic body 250 is made of a resin material such as a silicone resin or an elastomer such as rubber.
  • the Young's modulus of the elastic body 250 is smaller than the Young's modulus of the first plate 130. That is, the elastic body 250 is made of a material which can be stretched more easily than the first plate 130. Thereby, it is possible to suppress the bending of the first glass substrate 100 against local stress.
  • the elastic body 250 may be formed, for example, by roll coating, spin coating, screen printing, spray coating, slit coating, squeegee coating, or a drawing application using a dispenser depending on the viscosity and film thickness of the resin material used. A resin material is applied.
  • the elastic body 250 protrudes outward beyond the first glass substrate 100 in a plan view.
  • the elastic body 250 has a larger area than the first glass substrate 100 in plan view, and covers the entire first glass substrate 100.
  • the elastic body 250 is one size larger than the first glass substrate 100 and one size smaller than the first plate 130.
  • the thickness of the elastic body 250 is, for example, 100 ⁇ m to 1000 ⁇ m, and is 500 ⁇ m as an example.
  • the length of the elastic body 250 is, for example, 50 mm to 2000 mm, and is 200 mm as an example.
  • the width of the elastic body 250 is, for example, 5 mm to 1000 mm, and is 50 mm as an example.
  • the elastic body 260 shown to FIG. 7B is provided between the 1st glass substrate 100 and the 1st plate 130a.
  • the elastic body 260 is provided between the organic light emitting unit 120 and the first plate 130 a.
  • the elastic body 260 is an adhesive for bonding the organic light emitting unit 120 and the first plate 130 a.
  • the size and material of the elastic body 260 for example, the same size and material as the elastic body 250 can be used.
  • the organic EL element 20 further includes the elastic body 250 provided between the first glass substrate 100 and the first plate 130.
  • the Young's modulus of the elastic body 250 is smaller than the Young's modulus of the material constituting the first plate 130.
  • an elastic body 250 is provided between the first glass substrate 100 and the first plate 130 so as to have a smaller Young's modulus and is easier to stretch than the first plate 130.
  • the bending of the glass substrate 100 can be suppressed. Therefore, the organic EL element 20 or 21 according to the present embodiment is configured to be less likely to be broken.
  • the elastic body according to the present embodiment may have a plurality of small chambers (spaces).
  • the organic EL element 20 or 21 according to the present embodiment may include any of elastic bodies 251 to 253 shown in FIGS. 8A to 8C instead of the elastic bodies 250 and 260.
  • 8A to 8C are schematic cross-sectional views showing elastic bodies 251 to 253 according to modifications of the present embodiment.
  • FIG. 8A shows an elastic body 251 in which a plurality of sponge-like cells are formed.
  • a spherical space is formed in the elastic body 251 as a small chamber.
  • FIG. 8B shows an elastic body 252 in which a plurality of stripe-shaped small chambers are formed.
  • a plurality of substantially rectangular spaces are formed in a stripe shape as a thin chamber.
  • substantially rectangular spaces of the same size are regularly formed at predetermined intervals.
  • FIG. 8C shows an elastic body 253 in which a plurality of brick-like small chambers are formed.
  • a plurality of substantially rectangular spaces are formed in a brick shape as a thin chamber.
  • a substantially rectangular space having a random size is randomly formed.
  • the elastic bodies 251 to 253 having small chambers are formed, for example, by resin molding or the like.
  • a sponge-like elastic body 251 can be formed by foam-molding a resin.
  • the elastic body 252 in a stripe shape, the elastic body 253 in a brick shape, and the like can be formed by resin molding using a mold or the like.
  • the elastic body may have a plurality of chambers.
  • the elastic bodies 251 to 253 can be reduced in weight and elasticity can be enhanced, so that the organic EL element 20 or 21 according to the present embodiment can be made more difficult to break.
  • FIG. 9 is a schematic perspective view showing a lighting device 30 according to the present embodiment.
  • FIG. 10 is a schematic cross-sectional view showing a part of the illumination device 30 according to the present embodiment.
  • the illuminating device 30 shown in FIG. 9 is equipped with the organic EL element 40 shown in FIG.
  • the lighting device 30 includes a light emitting unit 31 formed of a plurality of organic EL elements 40, a hanging tool 32 for installing the light emitting unit 31 on a ceiling, and a power cord 33 connecting the light emitting unit 31 and the hanging tool 32.
  • the light emission part 31 is arranged side by side, for example so that the some organic EL element 40 may mutually adjoin.
  • the end of the light emitting unit 31 is covered and protected by the lamp case 34.
  • the hanger 32 has on its surface a remote control light receiver 35 for receiving a remote control signal transmitted from a remote control (not shown).
  • the organic EL element 40 shown in FIG. 10 differs from the organic EL element 10 shown in FIG. 1 in that a first plate 330 is provided instead of the first plate 130.
  • the second plate 140 side is a light emitting surface
  • the first plate 330 side is a non-light emitting surface. That is, as shown in FIG. 10, the organic EL element 40 is disposed such that the first plate 330 is in contact with the lamp case 34.
  • the first plate 330 is substantially the same as the first plate 130 according to the first embodiment. At this time, the thermal conductivity of the first plate body 330 is smaller than the thermal conductivity of the first glass substrate 100.
  • the thermal conductivity of the first glass substrate 100 is 0.9 W / m ⁇ K to 1.1 W / m ⁇ K
  • the thermal conductivity of the first plate 330 is 0.9 W / m. It is less than m ⁇ K.
  • the thermal conductivity of the first glass substrate 100 is 1 W / m ⁇ K
  • the thermal conductivity of the first plate 330 is 0.3 W / m ⁇ K.
  • the first plate 330 is made of a heat insulating material.
  • the first plate body 330 polyethylene terephthalate, polyethylene naphthalate, polyvinyl chloride, polycarbonate, polypropylene, polyethylene, polyimide or the like can be used as in the first plate body 130.
  • the first plate body 330 is formed by resin molding using a mold or the like.
  • the organic EL element 10 may be disposed so as to cover the screw 34a provided in the lamp case 34.
  • the screw 34a is an example of a high thermal conductivity portion made of, for example, metal.
  • the high thermal conductivity part includes not only screws but also nails and the like.
  • the first plate body 330 is provided to be in contact with the lamp case 34 and the screw 34 a. Therefore, if the thermal conductivity of the first plate 330 is high, the heat generated by the organic light emitting unit 120 is conducted to the screw 34 a through the first glass substrate 100 and the first plate 330. For this reason, the temperature of the organic light emitting unit 120 is locally decreased at the portion of the screw 34a, which may cause a dark portion.
  • the first plate body 330 according to the present embodiment suppresses the heat conduction from the first glass substrate 100, it is possible to suppress the occurrence of the light emission dark part.
  • lighting installation 30 concerning this embodiment is provided with organic EL element 40, for example.
  • the thermal conductivity of the first plate 330 is smaller than the thermal conductivity of the first glass substrate 100.
  • the thermal conductivity of the plate on the mounting surface side is smaller than the thermal conductivity of the glass substrate. Therefore, when the second plate 140 is on the non-light emitting surface side, the thermal conductivity of the second plate 140 is smaller than the thermal conductivity of the second glass substrate 110.
  • the illuminating device 30 can acquire the same effect, even if it is the structure installed not only in the structure suspended by a ceiling but in a wall.
  • the organic EL element 40 is attached to a mounting wall such as a gypsum board instead of the lamp case 34.
  • the temperature of the screw portion may be lowered by the high thermal conductivity portion such as the screw provided on the gypsum board, and the dark portion may be locally generated.
  • the organic EL element 40 according to the present embodiment since the thermal conductivity of the first plate 330 is lower than the thermal conductivity of the first glass substrate 100, the heat is the first plate 330. Transmission to the screw part etc. can be suppressed. Therefore, the generation of local dark areas can be suppressed.
  • the illuminating device 30 which concerns on this Embodiment may be equipped with not the organic EL element 40 but the organic EL element 10 or 20 mentioned above.
  • the illumination device 30 according to the present embodiment exhibits the same effect as that of the first or second embodiment. That is, it can be used as a lighting device that is not easily broken and is flexible.
  • the plan view shape of the first plate 130 and the plan view shape of the first glass substrate 100 may be the same.
  • the first glass substrate 100 may protrude outward from the first plate 130 in a plan view. In this case, although the end of the first glass substrate 100 is not protected, local bending of the first glass substrate 100 can be suppressed.
  • the present invention is not limited thereto.
  • the first plate 130 may have a structure in which a plurality of plates are connected.
  • the organic EL element 10 can be made less likely to be broken than in the case where the first plate 130 is not provided.
  • the first electrode 121 is an anode and the second electrode 123 is a cathode is shown, the opposite may be applied. That is, the first electrode 121 may be a cathode and the second electrode 123 may be an anode.
  • plan view shape of the organic EL element 10 is substantially rectangular
  • the present invention is not limited to this.
  • the planar view shape of the organic EL element 10 may be a closed shape drawn as a straight line or a curve, such as a polygon, a circle, or an ellipse.
  • the present invention can be realized by arbitrarily combining components and functions in each embodiment without departing from the scope of the present invention or embodiments obtained by applying various modifications that those skilled in the art may think to each embodiment.
  • the form is also included in the present invention.
  • organic EL element 30 lighting device 100 first glass substrate 110 second glass substrate 120 organic light emitting unit 130, 130 a, 131, 330 first plate 140 second plate 250 , 251, 252, 253, 260 elastic body

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

L'invention concerne un élément électroluminescent organique (10) qui est pourvu : d'un premier corps de carte (130) ; et d'un premier substrat de verre souple (100) et d'une section électroluminescente organique (120), qui sont stratifiés sur la surface principale du premier corps de carte (130). La charge de rupture rationnelle du premier corps de carte (130) est supérieure à celle du premier substrat de verre (100), et la flexion du premier corps de carte (130) est inférieure à celle du premier substrat de verre (100).
PCT/JP2015/001730 2014-05-13 2015-03-26 Élément électroluminescent organique et appareil d'éclairage WO2015174006A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2014099579 2014-05-13
JP2014-099579 2014-05-13

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018027892A (ja) * 2012-10-19 2018-02-22 日東電工株式会社 薄ガラス長尺体

Citations (5)

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Publication number Priority date Publication date Assignee Title
JP2004205601A (ja) * 2002-12-24 2004-07-22 Seiko Epson Corp 電気光学装置、電気光学装置の製造方法、電子機器
JP2010262897A (ja) * 2009-05-11 2010-11-18 Rohm Co Ltd 有機半導体装置
JP2011108566A (ja) * 2009-11-20 2011-06-02 Konica Minolta Holdings Inc 有機ｅｌパネル
JP2011204364A (ja) * 2010-03-24 2011-10-13 Brother Industries Ltd Ｅｌ発光素子
JP2012051186A (ja) * 2010-08-31 2012-03-15 Nippon Electric Glass Co Ltd ガラス−樹脂積層体、およびそれを巻き取ったガラスロール、並びにガラスロールの製造方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004205601A (ja) * 2002-12-24 2004-07-22 Seiko Epson Corp 電気光学装置、電気光学装置の製造方法、電子機器
JP2010262897A (ja) * 2009-05-11 2010-11-18 Rohm Co Ltd 有機半導体装置
JP2011108566A (ja) * 2009-11-20 2011-06-02 Konica Minolta Holdings Inc 有機ｅｌパネル
JP2011204364A (ja) * 2010-03-24 2011-10-13 Brother Industries Ltd Ｅｌ発光素子
JP2012051186A (ja) * 2010-08-31 2012-03-15 Nippon Electric Glass Co Ltd ガラス−樹脂積層体、およびそれを巻き取ったガラスロール、並びにガラスロールの製造方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018027892A (ja) * 2012-10-19 2018-02-22 日東電工株式会社 薄ガラス長尺体

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