JP3150461U - Decorative luminous body - Google Patents

Abstract

In a decorative light emitter, an outer peripheral surface of a three-dimensional object can be made to emit light with a simple configuration without impairing the aesthetic appearance based on the outer shape of the three-dimensional object serving as a base. A decorative light emitter 1 has a base 2 having a curved outer peripheral surface, a cathode layer 3 coated on the outer peripheral surface of the base, an organic light emitting layer 4 coated on the outer side of the cathode layer, The anode layer 5 is coated on the outside of the organic light emitting layer, and the power source 7 applies a predetermined voltage between the cathode layer and the anode layer. [Selection] Figure 1

Description

  The present invention relates to a decorative luminous body using organic EL (Organic Electro-Luminescence).

  Conventionally, as this type of decorative light emitter, an EL sheet in which a transparent electrode is provided on a transparent substrate, and a light emitting layer, an insulating layer, and a back electrode are sequentially stacked on the transparent electrode; A transparent sheet bonded to the light emitting surface, and the multi-color ink layer is printed on the transparent sheet, and the multi-color ink layer emits multi-color partial light using the EL sheet as a backlight. In addition, it is known that a light shielding layer is partially printed on the back side of the multicolor ink layer (see Patent Document 1). According to this, it is possible to obtain a decorative effect by causing the multicolor ink layer to emit light in multiple colors using the EL sheet as a backlight.

Japanese Patent No. 2723177

  However, since the above-described conventional technique uses an EL sheet (sheet-like light emitter) for light emission, there is a problem that it is difficult to apply to decoration of a three-dimensional object (such as an ornament). A method of curving the EL sheet and sticking it to a three-dimensional object is also conceivable, but the application target is limited to a three-dimensional object having a relatively simple outer peripheral surface shape, or the original outer shape of the three-dimensional object is changed. There was a problem that the beauty was impaired.

  The present invention has been devised in view of the problems of the prior art, and emits light to the outer peripheral surface of the three-dimensional object with a simple configuration without impairing the aesthetic appearance based on the outer shape of the three-dimensional object serving as a base. It is an object of the present invention to provide a decorative light emitter that can be made to operate.

  In order to solve the above-mentioned problems, a first idea is that a base (2) having a curved outer peripheral surface, a first electrode layer (3) applied on the outer peripheral surface of the base, and the first An organic light emitting layer (4) applied outside the electrode layer, a second electrode layer (5) applied outside the organic light emitting layer, and between the first electrode layer and the second electrode layer A power supply (7) for applying a predetermined voltage is provided.

  In addition, as a second device, a color filter layer (6) applied on the outside of the second electrode layer may be further provided.

  As a third device, the organic light emitting layer may be applied so as to cover the entire outer peripheral surface of the base.

  According to the first device described above, an excellent effect is achieved that the outer peripheral surface of the three-dimensional object can be emitted with a simple configuration without impairing the aesthetic appearance based on the outer shape of the three-dimensional object serving as a base. Moreover, according to the said 2nd invention, it becomes possible to carry out color light emission of the outer peripheral surface of the solid thing used as a base. Moreover, according to the said 3rd design, the decoration effect increases because the whole outer peripheral surface of the solid object used as a base light-emits.

The partially broken perspective view which shows schematic structure of the light-emitting body for decoration which concerns on embodiment

  Hereinafter, a decorative light emitter according to an embodiment of the present invention will be described with reference to the drawings. For convenience of explanation, in FIG. 1, the shape (thickness and the like) of the base 2 and each of the layers 3 to 6 in the fracture region is shown in a different form from a practical one.

  As shown in FIG. 1, the decorative light emitter 1 is a decorative article in which a base 2 is provided with an outer shell having a light emission curved surface, and a cathode layer (first electrode layer) 3 provided on the outer peripheral surface of the base 2. An organic light emitting layer 4 provided outside the cathode layer 3, an anode layer (second electrode layer) 5 provided outside the organic light emitting layer 4, and a color filter layer provided outside the anode layer 5 6 and a power source 7 for applying a predetermined DC voltage (for example, 2.5 to 10 V) between the cathode layer 3 and the anode layer 5.

  The base 2 is formed of a hollow sphere made of a resin such as polypropylene. The base 2 is not limited to the structure shown in the present embodiment, and an arbitrary three-dimensional object having an outer peripheral surface having at least a curved surface and capable of forming the layers 3 to 6 on the outer peripheral surface. Can be used. For example, the decorative light emitter 1 can be realized as a member constituting a design surface of a vehicle and a ship, a three-dimensional monument, or the like.

  The cathode layer 3 is formed by applying a binder resin to which conductive particles are added by spraying or the like so as to cover at least a part of the outer peripheral surface of the base 2. As the conductive particles, metal particles or carbon particles can be used. In some cases, a metal such as aluminum or magnesium may be attached to the outer peripheral surface of the base 2 by vapor deposition or the like.

  The organic light emitting layer 4 has a thickness of several tens to several hundreds nm and has a three-layer structure including an electron transporting light emitting layer 11, a carrier block layer 12, and a hole transporting light emitting layer 13.

  The electron transporting light-emitting layer 11 is formed by applying a material containing a fluorescent material by spraying or the like using an electron transporting material as a base material so as to cover the outside of the cathode layer 3. The electron transporting light emitting layer 11 receives electrons from the cathode layer 3 and transports them to the carrier block layer 12 side. As the electron transporting material, for example, a known compound such as a 1,3,4-oxazole derivative or a 1,2,4-triazole derivative (TAZ) can be used. Examples of the fluorescent material include tris (8-quinolinolato) aluminum complex (Alq), bis (benzoquinolinolato) beryllium complex (BeBq), tri (dibenzoylmethyl) phenanthroline europium complex (Eu (DBM) 3 ( Phen)) and ditoluyl vinyl biphenyl (DTVBi) can be used.

  The carrier block layer 12 is formed by applying an alcohol-based organic solvent in which a vinyl polymer is dissolved on the electron-transporting light-emitting layer 11 by spraying or the like. The carrier block layer 12 controls the movement of carriers (holes, electrons) between the light emitting layers 11 and 13 by changing the film thickness.

  The hole transporting light emitting layer 13 is formed by applying a material containing a fluorescent material with a hole transporting material as a base material onto the carrier block layer 12 by spraying or the like. The hole transporting light emitting layer 13 receives holes from the anode layer 5 and transports them to the carrier block layer 12 side. As the hole transporting material, for example, a known aromatic amine derivative can be used.

  The anode layer 5 is a transparent conductive film having a high transmittance in the visible light region, and is sprayed with a binder resin to which ITO (Indium Tin Oxide) particles are added so as to cover at least a part of the outer peripheral surface of the organic light emitting layer 4. It is formed by applying by, for example.

  The color filter layer 6 has the same structure as an RGB color filter used for a known organic EL display or the like, and is sensitized by adding a binder resin or the like to a resin composition in which a pigment is dispersed with a dispersant or the like. The photosensitive colored resin composition is applied by spraying or the like so as to cover the anode layer 5.

  In the decorative light-emitting body 1 having the above-described configuration, when the power supply 7 is turned on, electrons are injected from the cathode layer 3 into the electron-transporting light-emitting layer 11 and holes from the anode layer 5 to the hole-transporting light-emitting layer 13. And recombination of holes and electrons occurs in the light emitting layers 11 and 13 through the carrier block layer 12 interposed between the light emitting layers 11 and 13, respectively. By this recombination, the organic molecules are energized and become excited, and when they return to the ground state, they emit energy and emit light.

  As described above, in the decorative light emitter 1 having the above configuration, the organic light emitting layer 4 is formed along the outer peripheral surface of the base 2, so that the aesthetic appearance based on the outer shape (here, spherical shape) of the base 2 is not impaired. With a simple configuration, the outer peripheral surface can emit light. In addition, the decorative light-emitting body 1 is configured to emit light using the organic light-emitting layer 4, and thus has an advantage of saving power and generating less heat. Moreover, since the color light emitting layer 1 is formed on the outer side of the anode layer 5, the decorative light emitting body 1 can emit color light on the outer peripheral surface of the base 2. Further, in the decorative light emitter 1, since the organic light emitting layer 4 is applied so as to cover the entire outer peripheral surface of the base 2, the entire outer peripheral surface of the base 2 emits light and the decorative effect is enhanced.

  Although this invention was demonstrated in detail based on specific embodiment, these embodiment is an illustration to the last, Comprising: This invention is not limited by these embodiment. For example, the constituent material of the organic light emitting layer can be variously changed in consideration of film formability (coating property) and light emission capability. Moreover, the structure which formed the cathode layer as a transparent conductive film and reversed the arrangement | positioning of each layer inside and outside with the case of embodiment is also possible. Further, a configuration in which a sealing polymer film or oxide film is further formed outside the color filter layer is also possible.

DESCRIPTION OF SYMBOLS 1 Light-emitting body for decoration 2 Base 3 Cathode layer (1st electrode layer)
4 Organic light emitting layer 5 Anode layer (second electrode layer)
6 Color filter layer 7 Power source 11 Electron transporting light emitting layer 12 Carrier block layer 13 Hole transporting light emitting layer

Claims (3)

A base having an outer peripheral surface forming a curved surface;
A first electrode layer applied on the outer peripheral surface of the base;
An organic light emitting layer applied to the outside of the first electrode layer;
A second electrode layer applied to the outside of the organic light emitting layer;
A decorative light emitter comprising a power source for applying a predetermined voltage between the first electrode layer and the second electrode layer.   The decorative light emitter according to claim 1, further comprising a color filter layer applied to the outside of the second electrode layer.   The decorative light-emitting body according to claim 1 or 2, wherein the organic light-emitting layer is applied so as to cover the entire outer peripheral surface of the base.

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