JP2002352949A - Linear luminous body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a linear luminous body, in which driving by direct current and low voltage, and light emission of high luminance and high-speed response are made possible, and which is high in flexibility and elasticity and is superior in lightweight property, productivity and moreover in a process passing property. SOLUTION: On this linear luminous body where an electroluminescence element is installed comprising that an electrode layer composed of metal(s), having work function of not larger than 4.5 eV, at least in a part of the outer peripheral face of organic fiber, an organic light-emitting layer of at least one layer containing organic compound(s) having a carrier transport property, and a transparent electrode layer are laminated in this order.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a linear illuminant. More specifically, linear light emission that can be driven at direct current and low voltage, emit light with high luminance and high speed response, and is excellent in flexibility, flexibility, light weight, productivity, and process passability. About the body.

[0002]

2. Description of the Related Art Conventionally, as an electroluminescence (hereinafter sometimes abbreviated as EL) element, an inorganic EL which emits light by applying a voltage to an inorganic light emitting layer,
Organic E that emits light by injecting electrons into the organic light emitting layer
L is known, and in particular, with respect to a planar illuminant that emits light from a sheet on a film, the inorganic EL element is used in various fields such as a backlight of a liquid crystal display. Research and development of organic EL elements with higher luminance and lower power consumption are being actively conducted.

On the other hand, attempts have been made to use a linear EL element as a luminous body.
JP-A-32990 discloses an example of an EL element using a flexible conductor wire. In this technique, by forming an inorganic EL on a flexible conductor wire whose surface is insulated, a linear luminous body that emits light when an AC voltage is applied is formed, and it is preferable that the linear luminous body can be freely bent. Has advantages. However, when this linear light-emitting body is actually used as a light-emitting body, since it is an inorganic EL element, it is necessary to apply an alternating current and a relatively high voltage, and there is a risk of electric leakage or electric shock. The use may be very limited.

[0004] For example, Japanese Patent Application Laid-Open No. H10-64678 discloses an example of an organic EL type linear luminous body using metal as a linear conductor. In this technology,
The element can be driven with direct current and low voltage, and has low power consumption and is excellent.However, since metal is used as the linear conductor, the unit weight of the element is large, and it is used in large quantities for construction or decoration. In addition to being too heavy, this linear illuminant cannot be used as a material for fabric formation on a general loom or a tubular knitting machine, and has drawbacks such as poor workability and processability.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art, to perform driving at a direct current and a low voltage, to emit light with high luminance and high speed response, and to be excellent in energy saving. And flexible, flexible, lightweight, productivity,
It is still another object of the present invention to provide a linear luminous body having excellent processability.

[0006]

SUMMARY OF THE INVENTION The present invention provides a linear luminous body which has low power consumption, is excellent in energy saving, can emit light with high luminance and high speed response, is lightweight, and has excellent processability. For this reason, the present inventors have made intensive studies and found out that the disadvantages of the prior art can be solved by using a specific material and an electroluminescent element having a laminated structure, and have reached the present invention.

That is, according to the present invention, an electrode layer made of a metal having a work function of 4.5 eV or less and at least one layer of an organic compound containing an organic compound having a carrier transporting property are provided on at least a part of the outer peripheral surface of the organic fiber. An object of the present invention is to provide a linear light-emitting body provided with an electroluminescent element formed by laminating a light-emitting layer and a transparent electrode layer in this order.

[0008]

DETAILED DESCRIPTION OF THE INVENTION The organic fibers used in the present invention are:
There is no particular limitation, and examples include natural fibers, recycled fibers, semi-synthetic fibers, and synthetic fibers. As natural fibers, cotton, animal hair fibers, silk, hemp, etc., as regenerated fibers, rayon (viscose rayon) of cellulosic regenerated fibers,
Cupra (copper ammonia rayon) and the like, semi-synthetic fibers include cellulose-based semi-synthetic fibers such as acetate (triacetate), and synthetic fibers include polyester, polyamide, acrylic, aramid, and polyolefin. 1 out of
Although the seeds can be used alone and used, or two or more kinds of organic fibers can be used by blending, entanglement, blending, or twisting, the synthetic process is simple in terms of the production process. A method using a fiber alone is preferred. The form of the organic fiber is not particularly limited, and may be selected from long fibers (filaments) or short fibers (staples), or a mixture of long fibers and short fibers or a composite. As required
Although long fibers may be used as appropriate, long fibers are preferred. When such a long fiber is used, when forming and laminating each electrode layer for forming an EL element as described later or an organic light emitting layer, a more uniform laminated structure formed body having no spots can be obtained. Therefore, it is preferable.

[0009] Synthetic fibers are generally formed by a so-called spinning process in which a resin melt or a resin solution is discharged from a nozzle. The spinning method includes melt spinning, dry spinning, wet spinning, and dry spinning. Can be Among them, melt spinning has advantages such as extremely simple steps, excellent productivity, and the ability to freely control the cross-sectional shape of the fiber in producing synthetic fibers made of thermoplastic resin. In the present invention, the organic fibers are more preferably thermoplastic synthetic fibers. When the synthetic fiber obtained by the melt spinning is used as the organic fiber in the linear light-emitting body of the present invention, the material is not particularly limited, and may be a monofilament or a multifilament.

Hereinafter, among the organic fibers used in the present invention, thermoplastic synthetic fibers which are considered to be more preferable will be exemplified, but the present invention is not limited thereto.

The thermoplastic resin used for the thermoplastic synthetic fiber, which is considered to be more preferable among the organic fibers used in the present invention, is not particularly limited as a polymerization mode.
For example, a monomer having two condensable groups coexists (combination of AA type and BB type, or AB type alone), and when reaction conditions are appropriately selected, by-products are formed by polycondensation Synthesized by a mechanism in which a polymer is produced by elimination, a condensation type thermoplastic resin, for example,
Polyester formed by esterification reaction of carboxylic acid and alcohol, carboxylic acid or carboxylic acid chloride, and polyamide formed by reaction of amine, polycarbonate formed by transesterification reaction of alcohol and carbonic acid derivative, carboxylic acid anhydride Polyimides formed by cyclized polycondensation of diamines, polybenzimidazoles formed by the reaction of dicarboxylic acid esters and diamines, in addition, polysulfones, polyethers, polysulfides and the like are exemplified as condensation-type thermoplastic resins, Is, for example, only polyester,
Alternatively, it may be a single polycondensation reaction such as polyamide alone, or a poly (ester amide) in which both esterification and amidation can occur.
It may be a copolymerization reaction formed by a plurality of polycondensation reactions. In the same polycondensation reaction, for example, in a polyester, in an esterification reaction, a case where a copolymer is present may be used. For example, polycondensation with terephthalic acid, ethylene glycol and propylene glycol may be performed. Do, poly (ethylene terephthalate)
A copolymerized condensation-type thermoplastic resin called (propylene terephthalate) is produced, but such a copolymer may be used.

[0012] In addition to the above-mentioned condensation type thermoplastic synthetic resin, an addition type thermopolymer synthesized by a mechanism in which a monomer having a vinyl group, such as radical polymerization, anion polymerization or cationic polymerization, forms a polymer by an addition polymerization reaction. Plastic resins, for example, polyethylene, polypropylene, polymethylpentene, polystyrene, polyacrylic acid, polymethacrylic acid, polymethyl methacrylate, polyacrylonitrile, polytetrafluoroethylene, polyvinylidene fluoride, and the like are addition-type thermoplastic resins However, these may be, for example, homopolymerization such as polyethylene only or polypropylene only, or a copolymerization reaction formed by performing a polymerization reaction in the presence of a plurality of monomers. For example, styrene and methyl When carrying out the polymerization under methacrylate presence, poly - although (styrene methacrylate) that copolymerized added thermoplastic resin is produced, it may be a such a copolymer.

Among these thermoplastic resins, preferred are polyesters, polyamides and poly (ester amides) which are condensation-type thermoplastic resins. For example, in the case of polyester, as a dicarboxylic acid compound, for example, terephthalic acid, Aromas such as isophthalic acid, 2,6-naphthalenedicarboxylic acid, diphenyldicarboxylic acid, adipic acid, sebacic acid, eicosane diacid, 1,4-cyclohexanedicarboxylic acid, 5-sodium sulfoisophthalic acid, and 5-tetrabutylphosphonium isophthalic acid Group, aliphatic, alicyclic dicarboxylic acids and derivatives thereof. One of these dicarboxylic acid compounds may be used alone, or two or more kinds thereof may be used without impairing the gist of the invention. They may be used in combination. Aromatic, aliphatic, and alicyclic diol compounds such as lene glycol, propylene glycol, butylene glycol, tetramethylene glycol, 1,4-cyclohexanedimethanol, and polyethylene glycol can be mentioned. Among these diol compounds, One kind may be used alone, or two or more kinds may be used in combination as long as the gist of the invention is not impaired. Alternatively, one compound such as an aromatic, aliphatic, or alicyclic compound may be a single polycondensate of a hydroxycarboxylic acid compound having both a carboxylic acid and a hydroxyl group, such as polylactic acid and poly (3-hydroxypropionate). , Poly (3
-Hydroxybutyrate) and poly (3-hydroxybutyrate valerate), and a copolymer of these hydroxycarboxylic acids with dicarboxylic acids and diols. .

In the case of polyamide, for example, dicarboxylic acid compounds such as terephthalic acid, isophthalic acid, 2,6-naphthalenedicarboxylic acid, diphenyldicarboxylic acid, adipic acid, sebacic acid, 1,4-cyclohexanedicarboxylic acid, Aromatic, aliphatic, alicyclic dicarboxylic acids and derivatives thereof such as sodium-sulfoisophthalic acid and 5-tetrabutylphosphonium isophthalic acid; and one of these dicarboxylic acid compounds may be used alone. Good or two or more kinds may be used in combination within a range that does not impair the gist of the invention. Examples of the diamine compound include ethylenediamine, propylenediamine, butylenediamine, tetramethylenediamine, hexamethylenediamine, and 1,4-cyclohexane. Diamine Aromatic, aliphatic, and alicyclic diamine compounds. One of these diamine compounds may be used alone, or two or more diamine compounds may be used in combination without departing from the spirit of the invention. May be used,
Alternatively, one compound such as an aromatic, aliphatic, or alicyclic compound may be a single polycondensate of an aminocarboxylic acid compound having both a carboxylic acid and an amino group. For example, nylon 6, nylon 11 (poly-11-amino Undecanoic acid), and polyaminocarboxylic acids such as
Copolymers of these aminocarboxylic acids, dicarboxylic acids, and diamines may be used.

For example, in the case of poly (ester amide), a dicarboxylic acid capable of forming an ester and a diol;
Alternatively, a hydroxycarboxylic acid is formed by performing a polycondensation reaction in the presence of a dicarboxylic acid capable of forming an amide and a diamine or an aminocarboxylic acid,
There is no particular limitation, and these dicarboxylic acids, diols, hydroxycarboxylic acids, diamines, and aminocarboxylic acids may be used alone in each of the compound types, or within a range that does not impair the gist of the invention. Two or more kinds may be used in combination. Polyester terephthalate, polypropylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, or a liquid crystalline polyester, which is a polyester fiber, more preferably polyester, polyamide, or poly (ester amide).

The organic fiber of the present invention may be a matting agent, a flame retardant, a lubricant, an antioxidant, an ultraviolet absorber, an infrared absorber, a crystal nucleating agent, a fluorescent whitening agent, a terminal group, or the like, as long as the gist of the invention is not impaired. A small amount of an additive such as a sealant may be contained.

Although the fiber diameter of the organic fiber in the present invention is not particularly limited, it is 0.1 μm to
It is preferable to have a fiber diameter of 10 mm. In this case, it is preferable because the linear luminous body is rich in flexibility and flexibility, and is more excellent in productivity, processability, and the like.

Further, the strength of the organic fiber in the present invention is not particularly limited, but is 1.5 cN.
It is preferably at least / dtex. When the strength of the organic fiber is 1.5 cN / dtex or more, it is preferable because more stable flexibility and flexibility as a linear light-emitting body can be obtained, and productivity, process passability, and the like are further increased.

The linear illuminant of the present invention has a structure in which an EL element is provided on the surface of an organic fiber. The EL element comprises an electrode layer made of metal, an organic luminescent layer, and a transparent electrode layer. At least a part on the outer peripheral surface of the fiber, laminated and formed in this order, DC, driving at low voltage, and high brightness,
It functions as an electroluminescence element having characteristics such as light emission with high response speed. When the electrode layer made of metal is connected to the cathode of the power supply and the transparent electrode layer is connected to the anode, the light emitting layer emits light by the voltage applied from both, and this light is transmitted through the transparent electrode layer to the outer periphery of the linear luminous body. It is configured to radiate outward from the surface. The connection of the linear light emitter to the cathode and anode of the power supply is not particularly limited. For example, at one or both ends of the linear light emitter, an electrode made of a metal without forming an EL element A region where the layer and the transparent electrode layer are exposed may be provided, and this region may be used as a connection portion with a power supply.

The linear luminous body of the present invention has an electrode layer made of metal on at least a part of the outer peripheral surface of the organic fiber. The electrode layer serves as a cathode in an EL device and serves to inject electrons. Is satisfied, the work function is 4.5 eV or less, and the work function is preferably 4.0 eV or less from the viewpoint of easier electron injection. Further, in consideration of the light emission luminance of the light emitting body, a material made of a material capable of reflecting light from the electroluminescence element is preferably employed. The material of the electrode layer is not particularly limited. For example, Na, K, Rb, Cs
Al, alkaline earth metals such as Ca, Sr, and Ba, and Li, Mg, Sc, Y, L
a, Ti, Zr, Hf, V, Nb, Ta, Cr, Mn,
Tc, Fe, Ag, Zn, Cd, Al, Ga, In, T
Examples include l, Sn, Pb, As, Bi, and alloys selected from a plurality of them. Considering that oxidation hardly occurs and that the moldability is good, Mg, Ca, Al, Mg
/ Ag, Mg / In, Mg / Al, Al / Ca, Al /
A metal such as Li, or an alloy thereof, and the like are given.

The method for forming an electrode layer made of a metal having a work function of 4.5 eV or less, which is formed on at least a part of the outer peripheral surface of the organic fiber of the present invention, is not particularly limited. , A vacuum evaporation method, a sputtering method, an ion plating method, an ionization evaporation method, or the like can be used.

The linear luminous body according to the present invention has at least one organic luminous layer containing an organic compound having a carrier transporting property because it is an EL element.
In general, carrier transport means that electrons or holes are injected from a cathode or an anode, respectively, and recombine, so that the injected electrons or holes are more easily recombined in a series of flows in which EL emits light. As described above, each of the substances having improved mobility. For example, in the case of the electron transporting property among the carrier transporting properties, the cathode has no barrier between the cathode material and the LUMO, or the light emitting layer has an electron emitting layer. In some cases, the material does not have a transport property, and in the case of a hole transport property, the material is not particularly limited as long as an anode material and a HOMO barrier are selected.

The organic material constituting the organic light emitting layer is not particularly limited. For example, as a low molecular weight material, a tris (8-quinolinolato) aluminum complex (Al
q) and the like, and various kinds of polymers such as polyphenylenevinylene (PPV) or a derivative thereof, and a polyfluorene-based polymer may be mentioned, and these may be selected and used as needed. Examples of the compound used for such an organic light-emitting layer include books such as “Organic EL Device and Its Forefront of Industrialization (Supervised by Seizo Miyata, NTT)”, and Appl. Phys. Lett. And those reported in conference papers.

The method for forming the organic light-emitting layer in the linear light-emitting body of the present invention is not particularly limited. If necessary, a dry method such as an organic molecular beam evaporation method or a vacuum evaporation method, or an organic method may be used. A solution may be formed by using a solvent, and a method of forming a substrate by a wet method such as coating by dipping, an LB film method, and a thin film method using a self-assembly phenomenon may be used as appropriate.

As the organic light emitting layer in the linear light emitting body of the present invention, if necessary, for example, a hole transport layer or the like may be provided between the above-mentioned metal electrode layer (cathode) and the organic light emitting layer. Further, an electron transporting layer or the like may be sequentially laminated between an organic light emitting layer and a transparent electrode layer to be described later, if necessary. Here, the material used for the hole transport layer is not particularly limited. For example, N, N′-diphenyl-N, N′-bis (3-methylphenyl) -1,
Relatively low molecular weight aromatic amines such as 1'-biphenyl-4,4-diamine (TPD) or poly-
Examples of such polymers include N-vinylcarbazole (PVK) and other polymers having carrier transport properties themselves. Also, the material used for the electron transport layer is not particularly limited. For example, 2- (4′-tert-butylphenyl) -5- (4 ″ biphenyl) -1,3,4-oxadiazole (Bu -PBD).

Each of the electron transporting layer and the hole transporting layer may be a film made of an electron transporting material or a hole transporting material alone, or a resin dispersion film in which the electron transporting material or the hole transporting material is dispersed in an appropriate binder resin. And the like. Of these, the former single film is formed by a so-called solution coating method in which either a transport material is deposited or a solution in which any transport material is dissolved in an appropriate solvent is applied by dipping and then dried. Is done. Further, the latter resin dispersion film may be formed by a solution coating method using a solution in which an electron transporting material or a hole transporting material and a binder resin are dissolved in an appropriate solvent in the same manner as described above.

The organic light-emitting layer in the linear light-emitting body of the present invention may use various fluorescent or phosphorescent dyes in combination to control the hue of the emission color. Such fluorescent and phosphorescent dyes are not particularly limited, and include, for example, a cyanine dye, a xanthine dye, an oxazine dye, a coumarin derivative, a perylene derivative, an acridine derivative, an acridone dye, a quinoline dye, and the like. It is used by being mixed with an organic light emitting layer or by being deposited and laminated as a thin film.

The linear luminous body of the present invention is formed by laminating a transparent electrode layer in the order after the organic luminous layer in order to extract the light from the organic luminous layer to the outside when forming the EL element. is there. The material of the transparent electrode layer is not particularly limited. For example, ITO, IZO, tin oxide, zinc oxide, a translucent film of gold, a conductive polymer, or the like may be selected and used as needed.

The method for forming the transparent electrode layer is not particularly limited. If necessary, chemical vapor deposition, spray pyrolysis, vacuum evaporation, electron beam evaporation, sputtering, ion Various methods such as a beam sputtering method, an ion plating method, and an ion-assisted evaporation method may be appropriately used, and annealing may be performed at a high temperature after the layer is formed for the purpose of obtaining a transparent electrode layer having a lower resistivity. .

The linear luminous body of the present invention can form an EL element by using a transparent electrode layer as the outermost layer. Although there is no particular problem as the luminous body, the linear luminous body can be made more process-permeable. In order to be able to be excellent, or to protect the EL element,
For the purpose of suppressing deterioration, it is preferable that the entire outer surface of the linear luminous body is formed and protected with a light-transmitting protective film such as a transparent resin to form an EL element.

The linear luminous body of the present invention is an EL element in which layers having the respective functions are sequentially formed, and the thickness of each layer to be laminated is not particularly limited, but is not limited to an appropriate size. It is preferable that each layer has a layer thickness of 20 to 300 nm in consideration of the fact that an efficient light emission can be obtained by flowing the current. In this case, the light emitting material of the organic compound can emit light sufficiently by applying a DC voltage having a voltage of about 10 V.

The time at which the EL element is formed on the outer periphery of the organic fiber in order to obtain the linear luminous body in the present invention is not particularly limited. For example, the organic fiber is spun, mixed, entangled, Alternatively, after blending, an apparatus for laminating an electrode layer made of a metal, at least one organic light-emitting layer containing an organic compound, and a transparent electrode layer in this order is installed in the middle of the process immediately before winding, and lamination is performed. Such a method may be appropriately selected as necessary.

Further, the organic light-emitting layer in the linear light-emitting body of the present invention is used as an organic material capable of forming the light-emitting layer, as a hole transport layer or an electron transport layer, from the viewpoint of simplifying the manufacturing method. Materials, fluorescence, phosphorescent dyes and the like may be mixed to form the same layer and laminated.

For the above reasons, the linear luminous body of the present invention can emit light with high luminance and high speed response and can be driven at a direct current and a low voltage by using an organic EL element. Therefore, power consumption is small and energy saving or economy is excellent. In addition, since organic fibers are used as the material of the linear illuminant, the flexibility, flexibility, and lightness are excellent, so that, for example, a conventional linear illuminant using a metallic linear conductor as a material is used. It can be used as a night light emitting material for clothing, as well as being able to be replaced with a heavy light emitting body. From the viewpoint of clothing, the linear light-emitting body of the present invention is an organic EL element as described above, and it is not necessary to apply a very large voltage as in the case of the inorganic EL element used so far. Because of high light emission and high brightness, the possibility of causing harm to the human body is low, and it is very excellent in that the possibility of use for clothing is greatly expanded. And furthermore, that the linear luminous body of the present invention is made of organic fibers, it is possible to be a very inexpensive, and a light emitting element suitable for mass production,
It is excellent in productivity, and since the physical properties such as the breaking strength of the linear luminous body largely depend on the yarn physical properties of the base organic fiber, it is possible to control the fiber physical properties as necessary In addition to being excellent in that a flexible material design is possible, it is possible to obtain a linear luminous body that is excellent in process passability by providing desired yarn physical properties.

A fiber material formed using the linear light-emitting body of the present invention, for example, a cloth such as a woven fabric or a knitted fabric, is a lighting device or a liquid crystal display because it has high brightness, energy saving and excellent flexibility as a planar light-emitting body. It is suitable as a luminous body.

Hereinafter, the present invention will be described in more detail with reference to examples. However, the present invention is not limited to the following examples.

[0037]

EXAMPLES Example 1 A cross section of 1 mm in diameter was round and the yarn strength was 3.5 cN /
dtex polyethylene terephthalate fiber is used as an organic fiber, and Mg and A
electrode layer (film thickness 60 nm; work function 3.7 e)
V), and a film of Alq alone (electron transport layer, film thickness of 60 nm) and a film of TPD alone (hole transport layer, film thickness of 60 nm) were formed on the electrode layer in this order by a vacuum deposition method. An organic light emitting layer having a two-layer structure was formed by forming and laminating. Then, a 100 nm-thick ITO film is formed on the hole transport layer.
A transparent electrode layer was formed by a vacuum deposition method to constitute an EL element, thereby producing a linear luminous body. At both ends of the linear luminous body, a region where the metal electrode layer on which the EL element is not formed and the transparent electrode layer were respectively exposed was provided over a length of 10 mm, and was used as a connection portion with a power supply. The metal electrode layer where the EL element was not formed and the region where the transparent electrode layer was exposed were connected to a cathode and an anode of a power source, respectively, and a voltage was applied to the light emitting layer at room temperature and in the air. It was confirmed that green light was emitted at the voltage. The emission luminance was about 100 cd / m ² .

Example 2 A belt having a width of 1 mm and a thickness of 0.2 mm and a yarn strength of 4.8 c
An electrode layer (film thickness: 60 nm; work function: 3.7 eV) made of Mg and Al is formed all around the outer peripheral surface of the organic fiber by using as an N / dtex polyethylene modified cross-section yarn organic fiber. Bu-PBD in PVK
And a resin dispersion film (100 nm thick) in which coumarin 6, which is a fluorescent dye represented by the following chemical formula 1, is dispersed by a solution coating method (dipping) to form a single-layer organic light emitting layer. And

[0039]

Embedded image

Next, an ITO transparent electrode layer having a thickness of 100 nm was formed on the light emitting layer by a vacuum evaporation method to constitute an EL element, thereby producing a linear luminous body. At both ends of the linear luminous body, regions where the metal electrode layer on which the EL element was not formed and the transparent electrode layer were respectively exposed were provided over a length of 10 mm, and were used as connection portions with a power supply. The metal electrode layer where the EL element was not formed and the region where the transparent electrode layer was exposed were connected to a cathode and an anode of a power source, respectively, and a voltage was applied to the light emitting layer at room temperature and in the air. It was confirmed that green light was emitted at the voltage. The emission luminance is about 80 cd /
m ² .

[0041]

The linear illuminant of the present invention uses an organic EL element to provide high-luminance, high-speed luminescence, direct current,
It is excellent in energy saving or economy because it can be driven at low voltage, and has excellent flexibility, flexibility and light weight by using organic fiber as a base material. Not only can it be used as a luminous body, but it can also be used as a luminescent material at night for clothing.
Furthermore, since the linear luminous body of the present invention uses an organic fiber as a material, it can be a very inexpensive light-emitting element suitable for mass production, and is excellent in productivity and process passability. . When a fiber material is formed using the linear light-emitting body of the present invention, for example, a fabric such as a woven fabric or a knitted fabric has high brightness, energy-saving properties as a planar light-emitting body,
Since it is excellent in flexibility, it is suitable as a light emitting device such as a lighting fixture or a liquid crystal display.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H05B 33/22 H05B 33/22 D (72) Inventor Yasuhiko Tanabe 1-6-20 Dojima, Kita-ku, Osaka-shi F-term in Osaka Toray Co., Ltd. F-term (reference) 3K007 AB02 AB04 AB06 AB18 BA03 CA06 CB01 DA01 DB03 EB00

Claims (6)

[Claims] An electrode layer comprising a metal having a work function of 4.5 eV or less on at least a part of an outer peripheral surface of an organic fiber, and at least one electrode containing an organic compound having a carrier transporting property.
A linear luminous body provided with an electroluminescent element formed by laminating an organic luminescent layer and a transparent electrode layer in this order. 2. The linear luminous body according to claim 1, wherein the organic fibers are made of synthetic fibers. 3. The linear luminous body according to claim 1, wherein the organic fiber is a long fiber. 4. The linear luminous body according to claim 1, wherein the strength of the organic fiber is 1.5 cN / dtex or more. 5. The organic fiber has a fiber diameter of 0.1 μm to 10 mm.
The linear illuminator according to any one of claims 1 to 4, wherein 6. The linear luminous body according to claim 1, further comprising a coat layer as an outermost layer.