JP2002313555A - Complex of planar emitter and fiber structure, its manufacturing method, and fiber structure used therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a planar emitter of high added value with excellent design and high-class sensation, its manufacturing method, and the new use of a fiber structure in this field. SOLUTION: This complex is constituted by arranging the fiber structure on the surface of the planar emitter which emits light by electroluminescence, and the fiber structure is provided for decorating the planar emitter which emits light by electroluminescence.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite of a planar light-emitting body and a fiber structure having novel characteristics, a method for producing the same, and a fiber structure used therefor.

[0002]

2. Description of the Related Art Conventionally, electroluminescence (E)
A planar illuminant that emits light from a film-like sheet using L) is known. In the old days, many materials used inorganic materials, and they are used for backlights of liquid crystal displays.Recently, research and development of types using organic materials, which have the potential for higher brightness and lower power consumption, have been actively conducted. It is.

[0003]

Although attempts have been made to use the planar light-emitting body as described above for lighting and decorative materials, it is possible to obtain an added value corresponding to the price of the planar light-emitting body using only a film-like sheet. However, it was difficult to limit the use.

In view of such circumstances, an object of the present invention is to provide a composite of a planar light emitting body and a fiber structure for the purpose of enhancing the decorativeness of the planar light emitting body using EL. More specifically, the composite and its manufacturing method, as well as the fiber used for the composite, which have a high-class feel, are flexible and can be deformed into a free shape, and are used as interior materials and lighting materials, are used to obtain higher value-added materials. It is intended to provide a structure.

[0005]

The present invention employs the following means in order to solve the above-mentioned problems.

That is, the composite of the planar light-emitting body and the fiber structure of the present invention is characterized in that the fiber structure is arranged on the surface of the planar light-emitting body that emits light by electroluminescence.

Further, the method for producing a composite of a planar light-emitting body and a fiber structure according to the present invention is characterized in that the planar light-emitting body which emits light by electroluminescence and the fiber structure are bonded.

Further, the present invention relates to a decorative fiber structure for a planar luminous body which emits light by electroluminescence.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, a planar luminous body which emits light by electroluminescence has a thin film structure in which a luminescent material is arranged between planar electrodes, and emits light when an AC or DC voltage is applied. A device that emits light from a material. As the light emitting material, a phosphor of an inorganic and / or organic compound is used. It is preferable that at least one surface of the electrode of the planar light emitting body is a transparent electrode in order to extract light from the light emitting body to the outside. ITO (indium tin oxide), IZ, which is well known as a transparent electrode
Materials such as O (indium zinc oxide), tin oxide, and zinc oxide may be used, but a conductive polymer may be used depending on the application.

[0010] In order to impart high processability and design to applications such as interior materials, it is desirable that the planar light-emitting body of the present invention be formed of a flexible plastic substrate instead of a glass substrate. That is, it is preferable that the substrate on which the transparent electrode is formed of the planar light-emitting body of the present invention is not a glass substrate but a plastic substrate.

As an example of a light emitting material of an inorganic compound, Zn
What is necessary is to appropriately select and use a necessary inorganic phosphor in general, such as S and SrS.

As the phosphor that can be used for the plastic substrate, there can be mentioned the one in which the above-mentioned phosphor particles have been subjected to a moisture-proof coating. Since such phosphors can reduce the level of sealing to prevent moisture,
This is preferable when a plastic substrate having higher moisture permeability than glass is used.

As an element structure of a planar light-emitting device using a light-emitting material of an inorganic compound, a transparent electrode (anode) is formed on a substrate, a phosphor layer and an insulating layer are laminated thereon, and a metal electrode is formed as a cathode on the opposite surface. An electrode or a carbon paste electrode may be formed. Barium oxide or the like may be used for the insulating layer.
The thickness of each layer to be laminated is not particularly limited. However, since the above-mentioned moisture-proof coated phosphor has a particle diameter of 30 to 50 μm, it may be in a range of, for example, about 80 to 200 μm so that the phosphor is uniformly coated. . A light emitting material of an inorganic compound usually has a voltage of about 100 to 200 V and a frequency of 100 to 200 V.
It emits light when an AC voltage of about 0 Hz is applied.

The light emitting material of the organic compound is tris (8-quinolinolato) aluminum complex (Alq) as a low molecular weight material, polyphenylenevinylene (PPV) or a derivative thereof as a high molecular weight material, a polyfluorene-based polymer. And various other types are known, and may be selected and used as needed. Such compounds include, for example, books such as “Organic EL Devices and the Forefront of Their Industrialization (Supervised by Seiya Miyata, NTT)” and Appl.
Examples include those reported in internal and external academic journals such as hys. Lett.

As a device structure of a planar light emitting device using a light emitting material of an organic compound, a transparent electrode (anode) is formed on a substrate, and a hole transport layer, a light emitting layer, an electron transport layer, and the like are required thereon. The layers are sequentially stacked as needed. Further, M is used as a cathode
A metal having a small surface work function, such as g / Ag or Ca, is laminated. There is no particular limitation on the material used for the hole transport layer,
A relatively low molecular weight aromatic amine such as, for example, N, N'-diphenyl-N, N'-bis (3-methylphenyl) -1,1'-biphenyl-4,4-diamine (TPD); or Poly-N-vinyl carbazole (PVK)
And the like, which itself has a carrier transporting property. Although there is no particular limitation on the material used for the electron transport layer, for example, 2- (4′-tert-butylphenyl) -5- (4 ″ biphenyl) -1,3,4-oxadiazole (Bu-PBD) and the like The thickness of each layer to be laminated is not particularly limited, but may be, for example, 20 to 2 so that an appropriate amount of current flows to obtain efficient light emission.
It may be in the range of 00 nm. The light emitting material of an organic compound emits light when a DC voltage of about 10 V is applied.

Various fluorescent and phosphorescent dyes may be used in combination with the luminescent material to control the hue of the luminescent color. Examples of such fluorescent dyes include cyanine dyes, xanthine dyes, oxazine dyes, coumarin derivatives, perylene derivatives, acridine derivatives, acridone dyes, quinoline dyes, and the like. Further, in order to simplify the manufacturing method, a material used for the hole transport layer or the electron transport layer and a luminescent material, a fluorescent or phosphorescent dye may be mixed in the same layer. Similarly, in order to control the hue of the emission color, emission layers of different emission colors may be formed as separate layers and stacked. It is desirable that the luminescent color from the planar illuminant of the present invention be white so that it can be used for a wide range of applications as interior materials.

Although the use of inorganic compound luminescent materials has been put to practical use ahead of time, the luminance is low and it is unlikely that the luminous efficiency can be improved as compared with the current level. Therefore, in the present invention, the luminous efficiency can be improved with higher luminance. It is desirable to use a light emitting material of an organic compound. In particular, as a light emitting material of the organic compound of the present invention,
There is a possibility that luminous efficiency comparable to fluorescent lamps may be obtained in the future,
It is desirable to use a material that can utilize phosphorescence.

The method for producing the planar light-emitting body of the present invention is not particularly limited, but includes methods such as vapor deposition, coating, and screen printing.
What is necessary is just to select the method suitable for the said light emitting material, and to manufacture by the method normally performed.

As the fiber structure in the present invention, filaments, spun yarns, woven fabrics, knitted fabrics, non-woven fabrics, napkins and the like, which are made of at least one of natural fibers, regenerated fibers, semi-synthetic fibers and synthetic fibers, can be used. . Natural fibers include cotton, animal hair fiber, silk, hemp, etc. Regenerated fibers include cellulosic regenerated fiber rayon (viscose rayon),
Examples of semi-synthetic fibers such as cupra (copper ammonia rayon) include cellulose (semi-synthetic fibers) such as acetate (triacetate), and examples of synthetic fibers include various fibers such as polyester, nylon, acrylic, and aramid.

Among these, polyester fibers are the most important as materials having a wide range of applications as interior materials among general-purpose fibers. Therefore, in the present invention, polyester fiber structures such as polyethylene terephthalate, polypropylene terephthalate and polybutylene terephthalate are used. Is more effective. As polyester-based fiber structures, besides those consisting of polyester fibers only, cotton,
It includes a mixture of polyester fibers and at least one of natural fibers such as wool, semi-synthetic fibers such as acetate, regenerated fibers such as rayon, and synthetic fibers such as nylon, and the like.

In the present invention, such a fibrous structure is arranged on the surface of the planar light emitting device of the present invention. Here, as a mode of arranging the fiber structure on the surface of the planar light-emitting body, the fiber structure may be installed, fixed, bonded, or the like on one or both surfaces of the planar light-emitting body. An adhesive, an adhesive, a void, and the like may exist between the fiber structure and the planar light-emitting body as long as the effects of the present invention are not impaired.

In the present invention, when the planar illuminant and the fiber structure are bonded, the bonding may be performed by melting a part of the planar illuminant or the fibrous structure, or using an adhesive or an adhesive. The method used may be used. When bonding, it is desirable that the adhesive or the adhesive is transparent.

The fiber structure of the present invention desirably has a light transmittance of 50% or more and 99% or less so that light from the planar light emitter can be sufficiently emitted to the outside. The reason for this is that if the light transmittance is smaller than this, light from the planar light emitting body is obstructed and sufficient brightness cannot be obtained. If the light transmittance is larger than this, the fiber structure becomes too sparse. This is because it is difficult to obtain sufficient decorativeness. Here, the light transmittance may be calculated by using a colorimeter (Minolta 3700d or the like) in the transmission measurement mode and calculating the ratio of the integrated intensity of all wavelengths when the cloth is not installed and when the cloth is installed.

The composite of the planar light-emitting body and the fiber structure of the present invention has high flexibility and can be freely deformed.
It is desirable that the bending stiffness measurement value (B) specified by KES (Kawabat Evaluation System) generally used as a texture measurement system for a fiber structure is 0.01 or more and 6 or less. Here, the unit of the measured bending stiffness (B) is gf · cm ² / cm. The reason is that if the bending stiffness is larger than this, the force required for bending deformation is large and it is not possible to perform free deformation, and if the bending stiffness is smaller than this, the material and thickness will function as a planar light emitter. This is because there is a tendency that a sufficient configuration cannot be obtained. In the present invention, since a more flexible composite has a higher degree of freedom in design, it is more preferable that the measured bending stiffness is 3 or less.

In order to obtain such flexibility, the plastic substrate used for the planar light emitting device of the present invention preferably has a thickness of 10 μm or more and 80 μm or less. The reason is that if the thickness is larger than this, the flexibility may be impaired, and if the thickness is smaller than this, handling becomes difficult during the manufacturing process of the planar light emitter. For the same reason, it is desirable that the measured value of bending stiffness (B) of the planar light-emitting body is 0.01 or more and 6 or less. Since the film-like sheet has no voids in the material as compared with the fiber structure, the flexibility of the composite of the present invention is significantly inferior even at the same thickness, so that the flexibility of the composite of the present invention is more like a film-like surface than the fiber structure. The luminous body has a dominant effect.

Next, a method for producing the composite of the planar light-emitting body and the fiber structure of the present invention will be described. In the present invention, a planar light-emitting body that emits light by electroluminescence is bonded to a fiber structure. Here, "to bond" means to join the planar light-emitting body and the fiber structure using an adhesive or an adhesive. Adhesive is a general term for substances that are made of chemical substances such as glue and joins substrates, and adhesive is a general term for things that physically join substrates such as screws and pins. It is.

In the present invention, it is desirable to use an adhesive, particularly a transparent adhesive. The reason for this is that by using a transparent adhesive, as much light from the planar illuminant as possible can be extracted to the outside. Examples of transparent adhesives include epoxy, cyanoacrylate, urethane,
Melamine-based, acrylic-based, and other various adhesives may be used with high transparency. In particular, in the present invention, it is preferable to use an optical adhesive used for bonding an optical fiber or the like as having high transparency.

As the type of the adhesive used in the present invention, various types such as a thermosetting type, a moisture setting type, a hot melt type, and a light setting type can be used. Since the planar illuminant of the present invention emits light during use, it is more preferable to use a photocurable adhesive that cures with light.

The adhesive is applied by using screen printing or various kinds of coating equipment, and is applied to the surface light-emitting body and / or the fiber structure, and then bonded by bonding according to each type of adhesive. Allow the agent to cure. For example, in the case of a photocurable adhesive, curing can be performed by emitting light from a planar light-emitting body, and in the case of a thermosetting adhesive, heat treatment may be performed at a temperature of about 120 to 200 ° C.

The fibrous structure of the present invention is characterized by being used for decoration of a planar luminous body which emits light by electroluminescence. Here, decoration refers to changing the smooth surface of the planar light-emitting body to give it a design property and add value. In the present invention, the fiber structure is used particularly for decoration of the planar light-emitting body, whereby a new added value can be given to the planar light-emitting body.

For the purpose of decoration, the fiber structure of the present invention uses a yarn having a variety of structures, such as a composite false twisted yarn, a fusion false twisted yarn, a design yarn, a glossy yarn, and the like. It is desirable to use a weaving / knitting structure rich in changes such as weaving. Further, the fibrous structure of the present invention may be dyed, or a pattern may be printed.

The composite of the present invention is used as a light-emitting interior or the like having an excellent sense of quality and design, and is particularly suitably used as a light stand or a foot light.

[0033]

[Example] <Light transmittance> Colorimeter (Minolta 3700d)
Was used in the transmission measurement mode, and was calculated from the ratio of the total wavelength integrated intensity when the fabric was not installed and when the fabric was installed. <Bending stiffness> The texture measurement system KES (Kawabata Evalu)
The average value B of the lateral stiffness of the sample was measured using a measurement system (manufactured by Kato Tech Co., Ltd.). (Example 1) ITO was added to a 125 μm thick PET film.
Using a thin film formed by sputtering for the substrate,
In addition, a pink-white inorganic phosphor (Sylvania)
The layer, the barium oxide layer, and the carbon paste electrode were sequentially laminated by screen printing. This was sealed with an epoxy resin to obtain a planar light-emitting body using a light-emitting material of an inorganic compound.

A light-curing adhesive (LC manufactured by Toa Gosei: LC
R0136) was also applied by screen printing at an application amount of 4 g / m ² , and a polyester woven fabric using fusion-bonded yarn (yarn use: warp and weft both having a total fineness of 83 dtex-36 multifilament, weaving density: warp 80 × weft) 64 / inch,
(Woven texture: Amundsen, color: white, light transmittance: 45%) were overlapped, and the planar illuminant was allowed to emit light for 5 minutes to cure the adhesive.

The obtained composite emitted light brightly when an alternating current of 100 V and 400 Hz was applied. Further, the flexural rigidity in 6.3gf · cm ² / cm, it was possible flexible deformation. (Example 2) The same operation as in Example 1 was performed except that a PET film having a thickness of 75 µm was used as a substrate.

As a result, the bending rigidity of the obtained composite was 2.4.
It was gf · cm ² / cm and was very flexible and easy to deform. (Example 3) Polyester woven fabric using glossy yarn having a triangular cross section as a cloth (using yarn: both warp and weft have a total fineness of 56 decitex-24 multifilament, woven density: warp 62 x weft 44 / inch, woven structure: organdy, (Color: white, light transmittance: 70%) except that the color filter was used.

As a result, the obtained composite emits brighter light.
And its bending rigidity is 2.1 gf · cm ^Two/ Cm, very
It was flexible and easy to deform. (Example 4) ITO thin on a 75 μm thick PET film
A film formed by sputtering is used for the substrate, and
PVK as a hole transport polymer on top of
To Bu-PBD and 1,1,4,4-
Traphenyl-1,3 butadiene (TPB), Coomaly
6, DCM1 and Nile Red to mix
It was applied by clean printing. Further, Mg / Ag is steamed on it.
Light emission of organic compounds by attaching and sealing with epoxy resin
A planar light-emitting body using the material was obtained.

A light-curing adhesive (LC manufactured by Toa Gosei: LC
R0136) was also applied by screen printing at an application amount of 4 g / m ² , and a polyester woven fabric using fusion-bonded yarn (yarn use: warp and weft both having a total fineness of 83 dtex-36 multifilament, weaving density: warp 80 × weft) 64 / inch,
(Woven texture: Amundsen, color: white, light transmittance: 45%) were overlapped, and the planar illuminant was allowed to emit light for 5 minutes to cure the adhesive.

The obtained composite had a positive electrode on the ITO side and Mg /
Very bright light was emitted when a direct current of 10 V was applied using the Ag side as a negative electrode. Its bending rigidity is 1.7 gf · cm.
² / cm, it was very flexible and easy to deform. (Example 5) Polyester woven fabric using glossy yarn having a triangular cross section as a fabric (yarn use: warp and weft both having a total fineness of 56 dtex-24 multifilament, weaving density: warp 62 x weft 44 / inch, weaving structure: organdy, (Color: white, light transmittance: 70%) except that the procedure was the same as in Example 4.

As a result, the obtained composite emits brighter light.
And its bending rigidity is 1.3 gf · cm ^Two/ Cm, very
It was flexible and easy to deform.

[0041]

According to the present invention, a luminous interior material excellent in sense of quality and design can be obtained. Such interior materials are effective in creating new forms of light stands and foot lights. Further, since the composite of the planar light emitter and the fiber structure of the present invention is a planar light emitter, it is an eye-friendly light source with less glare. Furthermore, since the composite of the planar light-emitting body and the fiber structure of the present invention is flexible, it is possible to design freely with good workability, and for example, it is possible to provide a light-emitting interior that moves, such as fluttering due to vibration.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification FI FI Theme Court ゛ (Reference) // F21W 121: 00 F21W 121: 00 F21Y 105: 00 F21Y 105: 00 (72) Inventor Yasuhiko Tanabe Osaka 1-6-20 Dojima, Kita-ku, Osaka Toray Industries, Inc. Osaka Works F-term (reference) 3K007 AB00 AB18 BA07 CA06 CB01 DA01 DA05 DB03 EA02 EB00 EC01 FA00 4F100 AK42 AR00A BA02 CB00 CB04 DG11B DG12 EC182 GB90 JK02 JN01B JN01N JN30A YY00 YY00B

Claims (8)

[Claims] 1. A composite of a planar illuminant and a fibrous structure, wherein a fibrous structure is disposed on the surface of a planar illuminant that emits light by electroluminescence. 2. The fiber structure has a light transmittance of 50% or more and 99% or more.
% Or less, the composite of the planar light emitter and the fiber structure according to claim 1. 3. The KE of a composite of the planar light-emitting body and a fiber structure.
The composite of a planar light-emitting body and a fiber structure according to claim 1 or 2, wherein a measured value of flexural rigidity (B) defined by S measurement is 0.01 or more and 6 or less. 4. The planar light emitting device and the fiber structure according to claim 1, wherein a transparent adhesive is present between the planar light emitting device and the fiber structure. Complex. 5. A method for producing a composite of a planar light-emitting body and a fiber structure, comprising bonding the planar light-emitting body that emits light by electroluminescence and the fiber structure. 6. The fiber structure has a light transmittance of 50% or more and 99% or more.
%. The method for producing a composite of a planar light-emitting body and a fiber structure according to claim 5, wherein 7. The method according to claim 5, wherein a transparent adhesive is used for bonding. 8. A fibrous structure characterized by being used for decoration of a planar illuminant that emits light by electroluminescence.