JP2016152831A - Device for optical treatment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for optical treatment that generates a small amount of heat during optical treatment, has high emission luminance, and is excellent in safety and portability.SOLUTION: The device for optical treatment of the present invention comprises a light emission diode for light radiation, and a thin battery whose thickness is equal to or less than 1.5 mm. The light emission diode for light radiation and the thin battery are connected with a connection member capable of electrical connection, and a light emission wavelength is in a range of wavelengths of 400-2000 nm.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a phototherapy device, and more particularly, a phototherapy device comprising a light emitting diode for light irradiation and a thin battery, having a thin film structure, little heat generation during treatment, excellent ignition prevention, and portable properties. About.

  Conventionally, it is known that treatment with light irradiation, so-called phototherapy, is effective for a specific disease. For example, treatment for pain relief such as stiff shoulders and low back pain and thin hair treatment is performed by irradiation with red light or infrared light. By irradiating this infrared ray, for example, near-infrared light, by expanding the blood vessels, increasing tissue blood flow, suppressing the excitement of the sympathetic nervous system, activating cellular tissues and promoting wound healing, It is well known to work on inflammatory cytokines and analgesics to produce anti-inflammatory and analgesic effects. In particular, it has been clarified that the near-infrared region in the vicinity of a wavelength of 800 to 900 nm with little absorption to water, hemoglobin, and melanin is excellent in living body permeability and suppresses inflammation and pain by an action mechanism different from the thermal effect. . On the other hand, for treatment of atopic dermatitis, treatment by irradiation with blue light or ultraviolet light is performed.

  In this way, light is used for treatment of various diseases, and this method of using light alone is called phototherapy, and phototherapy is a combination of photochemotherapy with light irradiation. It is called PDT (Photo Dynamic Therapy). In this PDT, a photosensitive therapeutic agent known as a photochemotherapeutic agent is supplied to the treated area of the body from the outside or the inside. These therapies can be used to treat various skin and internal diseases.

  As a phototherapy device used for the phototherapy as described above, a plurality of light emitting means in which inorganic light emitting diodes (hereinafter abbreviated as LEDs) are arranged on the surface, and the light emission amount for each of the light emitting means. And a phototherapy device for performing treatment such as amelioration of inflammatory pain with near-infrared light, which includes a control means for controlling the luminescence time (see, for example, Patent Document 1). According to the phototherapy device disclosed in Patent Document 1, the light intensity distribution and temperature distribution on the treatment light irradiation surface are made uniform, and the treatment light is uniformly irradiated on the entire irradiation surface serving as a treatment site, thereby providing a therapeutic effect. It is said that can be increased.

  However, since the irradiation part used as a light source is a light emitting element having a diffuser plate and the like together with an LED light source and poor flexibility, for example, trying to uniformly irradiate light on a curved surface structure for a human body. In this case, it is necessary to arrange a large number of LEDs, the light emission control of a large number of LEDs becomes complicated, and the influence of heat generated by the LEDs themselves is also a problem.

  In response to the above problems, a phototherapy device using an organic light-emitting diode (hereinafter referred to as an organic electroluminescence element, OLED, or organic EL element) as a light source has been proposed. For example, there is disclosed a phototherapy device that uses an organic EL element as an organic light emitting semiconductor in an area to be treated in a mobile device used for a therapeutic or cosmetic treatment, and performs treatment by irradiating light (for example, a patent). Reference 2). Further, a phototherapy device having an organic EL element that emits a therapeutic wavelength and a control module that controls light emission conditions of the organic EL element is disclosed (for example, see Patent Document 3). According to this disclosed method, the light irradiation system can be controlled to a desired color characteristic by selectively selecting a plurality of organic EL elements or controlling light emission by a control module.

  However, these proposed phototherapy devices using organic EL elements have been devised to irradiate the affected area with uniform light, but phototherapy devices composed of a plurality of organic EL elements Since the light source part generates heat with light emission and the affected part is affected by heat, it is difficult to perform a safe treatment or a long-term treatment. In addition, in a phototherapy apparatus using such an organic EL element, an organic EL element with high luminous efficiency is required.

  Therefore, it is a phototherapy device using an organic EL element (OLED) as a light source, has a shape correspondence (flexibility) to an affected part of a curved surface to be treated, and has a low heat generation amount during light emission and a high light emission efficiency. The development of a phototherapy device equipped with is eagerly desired.

  In addition, many of the methods proposed in the above-mentioned patent documents are a method of supplying power from a fixed power source or an outlet as a method of supplying power to an LED or an organic EL element that is a light emitter for phototherapy. , Will naturally be restricted in the place of use. Therefore, development of a phototherapy device excellent in portability that can be freely carried to a predetermined place without being restricted by the place of use is eagerly desired.

JP 2009-055969 A JP 2005-520583 A Special table 2012-514498 gazette

  The present invention has been made in view of the above problems, and a solution to the problem is to provide a phototherapy device that has a small amount of heat generated during phototherapy, has high emission luminance, and is excellent in safety and portability. It is to be.

  As a result of diligent examination in view of the above problems, the present inventor has a light emitting light emitting diode and a thin battery, and the light emitting light emitting diode and the thin battery are connected by a connection member capable of being electrically connected, A phototherapy device with a specific emission wavelength range provides shape support for a thin, curved surface to be treated, generates less heat during phototherapy, has high emission brightness, and is highly safe and portable. The present inventors have found that a phototherapy device can be obtained and have reached the present invention.

  That is, the said subject of this invention is solved by the following means.

  1. A light emitting diode for light irradiation and a thin battery having a thickness of 1.5 mm or less are connected, and the light emitting diode for light irradiation and the thin battery are connected by an electrically connectable connection member, and the light emission wavelength is 400 to 2000 nm. A device for phototherapy characterized by being in a wavelength range.

  2. 2. The phototherapy device according to item 1, wherein the light emitting light emitting diode and the thin battery are disposed on a flexible substrate.

  3. 3. The phototherapy device according to claim 1 or 2, wherein the thin battery is disposed on a surface opposite to a light emitting surface of the light emitting light emitting diode.

4). The thin battery is a lithium ion secondary battery,
The active material of the positive electrode contains manganese,
The active material layer of at least one of the positive electrode and the negative electrode contains a softening agent,
The phototherapy device according to any one of claims 1 to 3, wherein a degree of reduced pressure inside the lithium ion secondary battery is in a range of 100 to 1000 Pa.

5. The thin battery is a lithium ion primary battery,
The active material of the positive electrode contains manganese,
The active material layer of at least one of the positive electrode and the negative electrode contains a softening agent,
4. The phototherapy device according to any one of items 1 to 3, wherein a pressure reduction degree inside the lithium ion primary battery is in a range of 100 to 1000 Pa.

  6). Item 6. The phototherapy device according to Item 4 or 5, wherein the softening agent is an acrylic polymer or a diene polymer.

  7). The device for phototherapy according to any one of Items 4 to 6, wherein the thin battery has flexibility.

  8). The phototherapy device according to any one of Items 1 to 7, wherein the light emitting diode for light irradiation and the thin battery are bonded together.

  9. The phototherapy device according to any one of items 1 to 8, wherein the light emitting diode for light irradiation is an organic electroluminescence element.

  10. The organic electroluminescence element is a flexible laminate in which an organic functional layer unit including a light emitting layer sandwiched between a pair of electrodes and a flexible sealing member are laminated in this order on a flexible substrate. The phototherapy device according to Item 9.

  11. Item 11. The phototherapy device according to Item 10, wherein the organic electroluminescence element has a configuration in which two or more organic functional layer units including the light emitting layer are stacked.

  12 Item 12. The phototherapy device according to Item 10 or 11, wherein the light emitting layer contains a phosphorescent compound as a light emitting material.

  13. 13. The phototherapy device according to item 11 or 12, wherein the two or more organic functional layer units emit light having different emission maximum wavelengths.

  14 13. The phototherapy device according to item 11 or 12, wherein the two or more organic functional layer units each emit light having the same emission maximum wavelength.

  15. Item 15. The phototherapy device according to any one of items 1 to 14, wherein a photochemotherapeutic agent is used together with light irradiation by the light emitting diode for light irradiation.

  By means of the above-mentioned means of the present invention, a phototherapy device having a shape corresponding to an affected part of a curved surface to be treated with a thin shape, a small amount of heat generated during phototherapy, a high emission luminance, and excellent safety and portability. Can be provided.

  It is presumed that the above problem can be solved by the configuration defined in the present invention for the following reason.

  In the phototherapy device of the present invention, a light emitting diode for light irradiation and a thin battery having a thickness of 1.5 mm or less are provided, and the light emitting diode for light irradiation and the thin battery are electrically connectable members. It is connected and the emission wavelength is in a wavelength range of 400 to 2000 nm.

  As described above, in the conventional phototherapy device, when irradiating the affected area with light, particularly when irradiating a large area, when an LED or the like is used as a light source, many LEDs are required. Sometimes he had the problem of increased fever. For efficient treatment, a thin and light emission light source is required to make the device compact. In addition, when used on curved surfaces such as skin, flexible planar light emitting elements have been desired.

  On the other hand, portability that does not require a fixed power source is eagerly desired. In response to such a demand, the present invention has a thin light emitting diode for light irradiation with flexibility and a thin thickness of 1.5 mm or less. By using a phototherapy device combined with a battery, it is thinner and more portable than a conventional portable phototherapy device. In particular, when combined with a flexible planar light emitting device, it can be used for curved surfaces such as skin, and uniform light can be irradiated to the affected area.

  In addition, in the phototherapy device of the present invention, by combining a light emitting light emitting diode and a thin battery, the heat of the light source can be efficiently radiated, and ignition can be prevented and safe treatment can be provided. .

  That is, depending on the type of phototherapy, high-intensity light irradiation may be performed, and at that time, it is necessary to add a high current to the phototherapy device. As a result, since the heat generation amount of the light source and the battery is increased, it is effective that the light source and the battery are both thin and have a wide radiation surface from the viewpoint of efficiently radiating the generated thermal energy. In addition, when an electronic device including a light source and a thin battery is configured, if there is an extra space in the electronic device, heat generated by heat transfer may stay in the space and heat dissipation efficiency may decrease. From this point of view, it is important to combine a thin-film light source and a thin-film battery to achieve a thin and compact design that eliminates extra space.

Schematic exploded view showing an example of the overall configuration of the phototherapy device of the present invention Schematic exploded view showing another example of the overall configuration of the phototherapy device of the present invention Sectional drawing which shows an example of the LED light-emitting device which uses LED which is an inorganic light emitting diode which is an example of the light emitting diode for light irradiation as a light source Sectional drawing which shows an example of a structure of the organic EL element containing the organic functional unit used suitably as a light emitting diode for light irradiation concerning this invention Schematic sectional view showing an example of the configuration of an organic EL element having two organic functional layer units Schematic sectional view showing another example of the configuration of an organic EL element having two organic functional layer units Schematic sectional view showing an example of the configuration of an organic EL element having three organic functional layer units Schematic sectional view showing another example of the configuration of an organic EL element having three organic functional layer units Sectional drawing which shows the structure of the thin lithium ion battery which is an example of the thin battery which concerns on this invention Schematic cross-sectional view showing an example of a method for joining organic EL elements arranged in parallel and a thin battery Schematic cross-sectional view showing an example of a method for joining a stacked organic EL element and a thin battery Top view and sectional view showing an example of the configuration of a phototherapy device in which an organic EL element and a thin battery are arranged in parallel (Embodiment 1) A top view and a sectional view showing an example of a configuration of a phototherapy device in which an organic EL element and a thin battery are arranged vertically (Embodiment 2) A top view and a cross-sectional view showing an example of a configuration of a phototherapy device in which a plurality of organic EL elements and thin batteries are arranged vertically (Embodiment 3) A top view and a cross-sectional view showing another example of a configuration of a phototherapy device in which a plurality of organic EL elements and thin batteries are arranged vertically (Embodiment 4)

  The phototherapy device of the present invention includes a light emitting light emitting diode and a thin battery having a thickness of 1.5 mm or less, and the light emitting diode and the thin battery are connected by a connection member that can be electrically connected. The emission wavelength is in the wavelength range of 400 to 2000 nm, it is thin and has a shape correspondence to the affected area of the curved surface to be treated, has a low calorific value during phototherapy, has high emission luminance, and is safe In addition, a phototherapy device excellent in portability can be realized. This feature is a technical feature common to the inventions according to claims 1 to 15.

  As an embodiment of the present invention, it is highly flexible that the light emitting diode for light irradiation and the thin battery are arranged on a flexible base material from the viewpoint that the effects of the present invention can be further expressed. This is a preferred embodiment from the viewpoint that a light irradiation surface corresponding to an affected part having various curved surfaces can be formed, and a high phototherapy effect can be obtained.

  Further, by adopting a configuration in which the thin battery is disposed on the surface opposite to the light emitting surface of the light emitting light emitting diode, a wide light emitting area can be obtained and a high phototherapy effect can be obtained.

  Further, as a thin battery, the active material of the positive electrode contains manganese, the active material layer of at least one of the positive electrode and the negative electrode contains a softening agent, and the degree of vacuum inside the battery is in the range of 100 to 1000 Pa. By applying an ion secondary battery or a lithium ion primary battery, the device can be miniaturized and can be used anywhere without being restricted by a fixed power source and can be used for a long time. Thus, it is possible to provide a phototherapy device that has a high ignition prevention property and is safe even when used for a long time.

  Further, the softening agent contained in the thin battery is an acrylic polymer or a diene polymer, or has flexibility. A thin battery having high flexibility and stability without causing leakage of the electrolyte in the electrolyte layer and without destroying the electrolyte layer due to bending even when it is bent according to the shape of the affected part. Can be realized.

  Moreover, it is possible to realize a phototherapy device having a stable electric circuit by bonding a light emitting light emitting diode and a thin battery by bonding.

  In addition, the light emitting diode for light irradiation is an organic EL element. Further, the organic EL element includes an organic functional layer unit including a light emitting layer sandwiched between a pair of electrodes on a flexible substrate, and a flexible sealing member. The laminated body having flexibility laminated in order can realize excellent flexibility as a device for phototherapy, can freely set its shape corresponding to the affected area, and has high luminous efficiency, affected area It is possible to prevent adverse effects due to fever on the skin and to enable treatment in a low temperature environment.

  In addition, it is preferable that the organic EL element has a configuration in which two or more organic functional layer units including a light emitting layer are stacked from the viewpoint that light irradiation with higher luminance can be efficiently performed.

  In addition, when the light-emitting layer contains a phosphorescent compound as a light-emitting material, it is possible to obtain higher luminous efficiency, to prevent adverse effects due to heat on the affected area during phototherapy, and to treat in a low-temperature environment Can be made possible.

  In addition, since two or more organic functional layer units emit light having different light emission maximum wavelengths, optimal light treatment can be performed by selecting light emission wavelengths suitable for treatment. It is preferable from the viewpoint.

  Moreover, it is preferable from a viewpoint which can obtain much higher luminous efficiency by making 2 or more organic functional layer units light-emit the light of the same light emission maximum wavelength, respectively.

  Furthermore, it is preferable to use a photochemotherapeutic agent together with light irradiation by a photodiode from the viewpoint of further enhancing the phototherapy effect.

  The term “emission wavelength in the present invention is in the wavelength range of 400 to 2000 nm” means that the emission maximum wavelength (λmax) is in the range of 400 to 2000 nm when the spectral emission spectrum of the light emitting diode for light irradiation is created. Say.

  Hereinafter, the present invention, its components, and modes and modes for carrying out the present invention will be described in detail. In addition, "-" shown in this invention is used in the meaning which includes the numerical value described before and behind that as a lower limit and an upper limit.

<Outline of phototherapy>
First, an outline of a phototherapy method (hereinafter also referred to as a phototherapy method according to the present invention) using the phototherapy device of the present invention will be described.

  As described above, the phototherapy or phototherapy referred to in the present invention is a method of performing treatment by light irradiation, that is, so-called phototherapy for a specific disease, and the phototherapy device of the present invention includes at least It is a device that irradiates light rays effective for phototherapy equipped with a light emitting light emitting diode and a thin battery.

  For example, for relief of pain such as stiff shoulders and back pain and treatment of thinning hair, treatment by irradiation with red light or infrared light is performed. This infrared treatment is performed by, for example, irradiating the affected area with near-infrared light to increase blood flow by expanding blood vessels, suppressing excitement of the sympathetic nervous system, or activating cellular tissue to activate wounds. It promotes healing and acts on inflammatory cytokines and analgesics to bring about anti-inflammatory and analgesic effects. In particular, the near-infrared region in the vicinity of a wavelength of 800 to 900 nm that absorbs less water, hemoglobin, and melanin has excellent biological permeability, and can suppress inflammation and relieve pain by an action mechanism different from the thermal effect. Treatment of atopic dermatitis by blue or ultraviolet irradiation.

  Thus, for the treatment of various diseases, a method using light is referred to as phototherapy, and a treatment using a photochemotherapeutic agent together with light irradiation is referred to as photodynamic therapy (PDT). In this PDT, a photosensitive therapeutic agent known as a photochemotherapeutic agent is supplied to the treated area of the body from the outside or the inside.

  The phototherapy method according to the present invention can be applied to the treatment of any illness, syndrome, disease, symptom, or various illnesses that respond to phototherapy or cosmetic symptoms.

  Therapeutic diseases and cosmetic conditions to which phototherapy can be applied include, for example, skin diseases and skin-related symptoms including skin aging and cellulite, enlarged pores, oily skin, folliculitis, Precancerous actinic keratosis, skin damage, aging, bruised and sun-damaged skin, eyelids, skin ulcers (diabetic, pressure ulcer, venous stasis), rosacea acne, cellulite Light adjustment of sebaceous glands and surrounding tissues, scoring, acne scars and acne bacteria, inflammation, pain, trauma, mental and nervous system related diseases and symptoms, comedones, edema, Paget's disease, primary tumor and metastasis Sex tumors, connective tissue diseases, collagen treatment, fibroblasts, and fibroblast-derived cell levels in mammalian tissues, retinal irradiation, neoplastic diseases, neovascular diseases and hypertrophic diseases, inflammatory and allergic reactions, sweat, D Phosphorus sweat gland (sweat gland) or sweat from the apocrine gland and hyper-hydrosis, jaundice, vitiligo, ocular neovascular disease, bulimia nervosa, herpes zoster, seasonal affective disorder, depression, sleep disorder, skin Cancer, Kriegler-Nager disease, atopic dermatitis, diabetic skin ulcer, pressure ulcer, bladder infection, muscle pain relief, pain, joint stiffness, bacterial reduction, gingivitis, tooth whitening, teeth and mouth tissue Treatment, wound healing.

  The cosmetic symptoms are selected from acne, skin rejuvenation and skin wrinkles, cellulite and vitiligo, and psoriasis (mild, mild to severe, and severe).

<Wavelength applied to phototherapy>
In the phototherapy device of the present invention, the light emission wavelength of a light emitting light emitting diode, for example, an organic EL element is in a wavelength range of 400 to 2000 nm.

  Further, the emission wavelength of the light emitting light emitting diode, for example, the organic EL element is preferably 400 to 1000 nm, more preferably 400 to 950 nm, and particularly preferably 400 to 900 nm.

  One of the main effects of phototherapy is known to be able to alleviate, for example, stiffness and pain by irradiating the skin surface with light of various wavelengths. That is, stimulation of metabolism in mitochondria. After the phototherapy, the cells increase in metabolism, improve transmission, and improve resistance to good stress and the like.

  The light emitting diode for light irradiation according to the present invention, for example, an organic EL device can be used for cell stimulation. A preferred wavelength or wavelength range for cell stimulation is 600 to 900 nm, more preferably 620 to 880 nm, and particularly preferably 650 to 870 nm. Examples of particularly preferred wavelengths for cell stimulation are 683.7 nm, 667.5 nm, 772.3 nm, 750.7 nm, 846 nm, and 812.5 nm.

  The wavelength or wavelength range applied for skin care and skin repair is preferably in the range of 400 to 800 nm, more preferably in the range of 450 to 750 nm, still more preferably in the range of 500 to 700 nm. Preferably it is the range of 580-640 nm.

  Moreover, as a light emitting light emitting diode used for acne treatment, for example, an organic EL element, a combination of red light and blue light is particularly preferable. The red light is preferably selected from the range of 590 to 750 nm, more preferably 600 to 720 nm, and still more preferably 620 to 700 nm. Two additional wavelengths preferred for the treatment of acne are 633 nm and 660 nm.

  In the case of a comedone, it is particularly preferable to apply an organic EL element that emits light having a wavelength of 500 nm or a wavelength in the range of 500 to 700 nm.

  The wavelength for treatment or prevention of cellulite (subcutaneous fat) is in the range of 400 to 1000 nm, preferably in the range of 400 to 900 nm, more preferably in the range of 450 to 900 nm, and particularly preferably in the range of 500 to 850 nm. It is.

  In addition, the wavelength for treatment or prevention of skin aging and the reduction or prevention of wrinkle formation is in the range of 400 to 950 nm. This wavelength is preferably in the range of 550 to 900 nm, more preferably in the range of 550 to 860 nm.

  In addition, the light emitting diode for light irradiation applied to skin rejuvenation, for example, an organic EL element, is in the range of 700 to 1000 nm, preferably in the range of 750 to 900 nm, more preferably in the range of 750 to 860 nm, and particularly preferably 800. It is a light emitting diode for light irradiation that emits light in the range of ˜850 nm.

  The wavelength for treatment and prevention of skin redness is in the range of 460 to 660 nm. The wavelength is preferably in the range of 500 to 620 nm, more preferably in the range of 540 to 580 nm. One particularly preferred wavelength for this purpose is 560 nm.

  The wavelength for treatment and prevention of dermatitis is in the range of 470 to 670 nm. The wavelength is preferably in the range of 490 to 650 nm, more preferably in the range of 530 to 610 nm. Two particularly preferred wavelengths for this purpose are 550 nm and 590 nm.

  Moreover, the wavelength for the treatment and prevention of atopic eczema is in the range of 470 to 670 nm. The wavelength is preferably in the range of 490 to 650 nm, more preferably in the range of 530 to 610 nm.

  The wavelength used for the treatment of edema is preferably in the range of 760 to 940 nm, more preferably in the range of 780 to 920 nm, still more preferably in the range of 800 to 900 nm, and particularly preferably in the range of 820 to 880 nm. .

  Moreover, the phototherapy device of the present invention can be used to treat a wound. Preferred wavelengths for the treatment of wounds by phototherapy are in the range of 600-950 nm, more preferably in the range of 650-900 nm, particularly preferred wavelengths are 660, 720, 880 nm.

  In addition, as described in JP-T-2002-51916, by irradiating 1917 nm infrared rays, the immune system is stimulated, so that no harm is caused to normal cells. Can be treated.

  Moreover, the wavelength for the treatment and prevention of nervous system and mental diseases and symptoms is in the range of 350 to 600 nm. The wavelength is preferably in the range of 400 to 550 nm, more preferably in the range of 440 to 500 nm. Two preferred wavelengths for this purpose are 460 nm and 480 nm.

<< Photodynamic therapy (PDT) >>
In the phototherapy method using the phototherapy device of the present invention, it is preferable to apply photodynamic therapy (PDT) using a photochemotherapeutic agent together with light irradiation by the light emitting diode for light irradiation.

  PDT provides a topical or internal use of a photosensitive therapeutic agent known as a photopharmacological agent to the region of the body to be treated. Next, in this region, the photochemotherapy agent is activated by radiating light having an appropriate wavelength and intensity with the phototherapy device of the present invention. For example, a method of treating a tumor in which a photosensitizing substance as a photochemotherapeutic agent is taken into tumor cells and irradiated with light to kill the cells. More specifically, reactive oxygen is generated by introducing photosensitized fluorescent protein or the like into tumor cells or endothelial cells of new blood vessels in tumor tissue and irradiating with appropriate light. This active oxygen is a method in which tumor cells or tumor tissue are damaged and the tumor disappears.

  As a photochemotherapeutic agent (also referred to as a photosensitizing compound) applied to the photodynamic therapy (PDT), it is converted into a cytotoxic form upon irradiation with a photoactivating light beam, or is cytotoxic. A formulation containing a photosensitizing substance that gives rise to seeds.

  Photochemotherapeutic agents can be used for either systemic or local administration (eg, by delivery to the intestine, buccal, sublingual, gingival, palate, nasal, lung, vagina, rectum or eyeball). Photodynamic therapy formulations can also be provided in dosage forms suitable for oral or parenteral administration. Among these, photodynamic therapy preparations for topical administration include gels, creams, ointments, sprays, lotions, waxes, sticks, soaps, powders, tablets, films, vaginal suppositories, aerosols Formulated in any of drops, solutions, and conventional pharmaceutical forms in the art. In the case of topical administration or oral administration, absorption enhancers such as lubricants, moisturizers, emulsifiers, suspending agents, preservatives, sweeteners, flavoring agents, surface penetration aids and the like may be further included as necessary. .

  Examples of the photochemotherapeutic agent include 5-aminolevulinic acid hydrochloride (Crawford Pharmaceuticals), methylaminolevulinic acid (Metfix (registered trademark)), and Photocure (Photocure). ) And other topical agents. Also, for example, Photofin® (Photofin®) (from Axcan) and Foscan® (Fosscan®) (from Biolittech Ltd) There are injection drugs mainly used for malignant diseases. The drug is often applied in an inactive form, which is metabolized to a photosensitive photochemotherapeutic agent.

《Phototherapy device》
The phototherapy device of the present invention has a light emitting light emitting diode, for example, an organic EL element and a thin battery having a thickness of 1.5 mm or less, and the light emitting light emitting diode and the thin battery can be electrically connected. And a light emitting wavelength in a wavelength range of 400 to 2000 nm.

  In the phototherapy device of the present invention, furthermore, it is composed of a light emitting light emitting diode having flexibility, for example, an organic EL element and a very thin thin battery having a thickness of 1.5 mm or less, It can be placed at appropriate positions along a wide range of treatment sites with various curved surfaces, and by using a surface emitting device, light irradiation under high-brightness conditions is possible, and heat generation at affected areas etc. By suppressing the above, it is possible to obtain an effective therapeutic effect with high output. Furthermore, by adopting a lithium ion battery containing manganese as a thin battery, it is a phototherapy device with high ignition prevention and high safety in handling.

  Hereinafter, the specific configuration and the like of the phototherapy device of the present invention will be described in detail with reference to the drawings. First, the schematic overall configuration of the phototherapy device of the present invention, and then the phototherapy device of the present invention. The light emitting diode for light irradiation, which is the main constituent element, particularly the organic EL element among them, will be described in detail, and finally a specific embodiment will be described. Note that, in the drawings described below, the same components are denoted by the same reference numerals, and redundant descriptions are omitted. In the description, numerals and symbols described in parentheses after each component represent the reference numerals of the components described in each figure.

<Schematic configuration of phototherapy device>
First, a schematic overall configuration of the phototherapy device of the present invention will be described.

  FIG. 1 is an example of the overall configuration of the phototherapy device of the present invention, and is a schematic exploded view showing an example in which an organic EL element and a thin battery are used as light emitting diodes for light irradiation and are arranged in parallel on the same plane.

  (A) of FIG. 1 is an overall view of a phototherapy device (100) in which the constituent members (I) to (III) shown in (b) of FIG. 1 are assembled, and (101) is an organic EL. This is a light irradiation window that transmits light emitted from the element (EL) and irradiates the affected area.

  (B) of FIG. 1 is a diagram showing the arrangement of the constituent members of the phototherapy device (100). The outermost surface protects the phototherapy device (100) as (I), and is irradiated with light. A surface substrate (102) having a window (101) is disposed. In addition, you may abbreviate | omit a surface base material (102) according to the objective and a structure.

  In (II), an organic EL element (EL), which is a light emitting light emitting diode, and a thin battery (104), for example, a lithium ion battery, are arranged in parallel on the same plane below the surface substrate (102). ing. The organic EL element (EL) and the thin battery (104) are connected by an electrically connectable connection member (a connection member (106) described in FIGS. 10 and 12 to be described later). Description is omitted. In addition, (103) represents the light emission area | region in an organic EL element (EL).

  In (III), the flexible base material (105) for hold | maintaining both is arrange | positioned under the organic EL element (EL) and the thin battery (104). The flexible substrate (105) may be omitted depending on the configuration. Further, a wearing member for fixing the phototherapy device (100) to a housing or the like, for example, an adhesive layer or the like may be provided.

  FIG. 2 is a schematic exploded view showing another example of the overall configuration of the phototherapy device of the present invention, which is a phototherapy device in which an organic EL element and a thin battery are arranged vertically as a light emitting diode for light irradiation.

  As in FIG. 1, (a) of FIG. 2 is an overall view of the phototherapy device (100) in which the constituent members are assembled, and (b) of FIG. 2 is each constituent member of the phototherapy device (100). The arrangement of

  In (b) of FIG. 2, as shown by (I), a surface base material (102) having a light irradiation window (101) is disposed on the entire surface. The lower part has an organic EL element (EL) having a light emitting region (103) as shown in (IIa), and the lower part has a thickness of 1.5 mm or less as shown in (IIb). Thin battery (104) is arranged. The organic EL element (EL) indicated by (IIa) and the thin battery (104) indicated by (IIb) are connected by an electrically connectable connecting member (not shown). A flexible base material (105) for holding each member constituting (I) to (IIb) is provided at the lowermost part. The flexible substrate (105) may be omitted depending on the configuration. Further, a wearing member for fixing the phototherapy device (100) to a housing or the like, for example, an adhesive layer or the like may be provided.

<< Each component of phototherapy device >>
[Surface substrate (102) and flexible substrate (105)]
In the phototherapy device of the present invention, the surface substrate (102) disposed on the outermost surface is at least a position (101) corresponding to a light emitting diode for light irradiation, for example, a light emitting region (103) of an organic EL element (EL). However, for example, in order to irradiate the affected area to be treated with light irradiated by the organic EL element, it is necessary to have light transmittance in a wavelength range of 400 to 2000 nm. About another part, it can be set as arbitrary structures regardless of especially transparency and opaqueness. Moreover, about the flexible base material (105) arrange | positioned at the lowermost part, it can be set as arbitrary structures regardless of transparent and opaque. The light transmittance in the present invention means that the light transmittance in a predetermined wavelength region is 60% or more, preferably 70% or more, more preferably 80% or more, and particularly preferably 90% or more. It is.

  The flexibility referred to in the present invention means that each substrate is wound 10 times around an ABS resin (acrylonitrile-butadiene-styrene copolymer resin) rod having a diameter of 5 mm and repeatedly opened and then visually confirmed. It refers to the property that the substrate is not damaged such as cracks or chips.

  Examples of the material constituting the surface base material (102) and the flexible base material according to the present invention include polyesters such as polyethylene terephthalate (PET) and polyethylene naphthalate (PEN), polyethylene, polypropylene, cellophane, cellulose diacetate, and cellulose. Cellulose esters such as triacetate (TAC), cellulose acetate butyrate, cellulose acetate propionate (CAP), cellulose acetate phthalate, cellulose nitrate and their derivatives, polyvinylidene chloride, polyvinyl alcohol, polyethylene vinyl alcohol, syndiotactic Polystyrene, polycarbonate, norbornene resin, polymethylpentene, polyetherketone, polyimide, polyethersulfone ( ES), polyphenylene sulfide, polysulfones, polyether imide, polyether ketone imide, polyamide, fluororesin, nylon, polymethyl methacrylate, acrylic and polyarylates, Arton (trade name, manufactured by JSR) and Appel (trade name, Mitsui Chemicals) And cycloolefin-based resins, etc.

[Light emitting diode for light irradiation]
The light-emitting light-emitting diode applicable to the phototherapy device of the present invention is not particularly limited, and examples thereof include inorganic light-emitting diode LEDs and organic light-emitting diode organic EL elements. It is particularly preferable to use the organic EL element as a light emitting diode for light irradiation from the viewpoint of enabling thinning and obtaining light with high luminance.

[LED device]
FIG. 3 is a cross-sectional view showing an example of an LED light-emitting device that uses an LED, which is an inorganic light-emitting diode, which is an example of a light-emitting light-emitting diode, as a light source.

  In FIG. 3, an LED light emitting device (201) includes an LED light source (202), a light guide (204), a reflector (205), and a diffuser plate (L) for emitting light (L) uniformly over a wide range. 206). As the light guide (204), for example, an acrylic plate can be used, and the diffuser plate (206) may include unevenness processing or fine particles to increase the light extraction efficiency in the resin film.

  In order to obtain light emission of an arbitrary wavelength, an LED light source (201) that emits emitted light (203) of an LED of an arbitrary wavelength may be used, or a layer coated with a light emitting material having an arbitrary light emission wavelength, Alternatively, the contained layer is arranged on the upper surface or the lower surface of the diffusion plate (206), or the diffusion plate (206) containing a light emitting substance having an arbitrary emission wavelength is used to be excited by the LED light source (202) to emit light. Also good. Examples of the light emitting substance having such a function include quantum dots and fluorescent materials. Alternatively, the white LED light source (202) is converted into white light by using a color filter installed on the upper surface or lower surface of the diffuser plate (206) or a diffuser plate (206) having a color filter function. A method of obtaining light emission of a wavelength may be used.

[Organic EL device]
Next, the details of the organic EL element suitable as the light emitting light emitting diode according to the present invention will be described.

  In the following description, a configuration in which an organic functional layer unit including a light emitting layer sandwiched between a pair of electrodes and a flexible sealing member is provided on at least a flexible substrate is referred to as an “organic EL element (EL)”, which is an anode, light emitting The structure composed of the layer, the organic functional layer group, and the cathode is referred to as “light emitting unit (12)”, and the structure composed of the light emitting layer and the organic functional layer group is referred to as “organic functional layer unit (4)”.

(1. Basic configuration of organic EL element)
Next, a detailed configuration including the light emitting unit (12) of the organic EL element (EL) will be described with reference to the drawings.

  FIG. 4 is a partial configuration diagram showing a basic configuration including a light emitting unit of an organic EL element.

  The organic EL element (EL) according to the present invention has a tandem structure in which an organic functional layer unit (4) including at least two light emitting layers is laminated on a flexible substrate (1).

  FIG. 4 shows a first electrode (3, anode) constituting a pair of electrodes on a flexible substrate (1), and an organic functional layer group 1 (22), a light emitting layer (23), and an organic function thereon. It has an organic functional layer unit (4) composed of layer group 2 (24). In FIG. 4, only one organic functional layer unit (4) is shown for convenience, but a structure in which two or more organic functional layer units (4) are stacked has a higher luminance. This is preferable in that light can be obtained.

  The second electrode (6, cathode) on the organic functional layer unit (4) is formed, and the light emitting unit (12) is configured by the first electrode (3) to the second electrode (6). An adhesive layer for sealing (13) and a flexible sealing substrate (14) are provided on the second electrode (6) so as to cover at least the organic functional layer unit, and the organic EL element (EL) is provided. Forming. In such a configuration, the light emitting region (103) in the organic EL element is a region where the organic functional layer unit (4) and the second electrode (6) are formed.

  In the organic EL element (EL) shown in FIG. 4, the first electrode (3) is formed of a transparent electrode, whereby the emitted light L emitted at the light emitting point h of the light emitting unit is converted into the first electrode (transparent electrode). 3) It can be taken out from the side.

  The organic EL element (EL) according to the present invention is characterized in that the emission wavelength is in the range of 400 to 2000 nm. By having such a wide light emission wavelength range, light emission suitable for phototherapy can be selected at any time. Such control of the emission wavelength can be realized by selecting the type of the luminescent compound used in the luminescent layer or combining two or more luminescent compounds.

  Moreover, in the organic EL element which concerns on this invention, it is set as the structure in which two or more organic functional layer units each have a different light emission maximum wavelength, irradiates the light of a suitable wavelength according to a treatment object. This is preferable. In addition, when two or more organic functional layer units have the same emission maximum wavelength, it is possible to irradiate high-luminance light without heat generation, which is a preferable mode.

(2. Organic EL device with tandem structure)
In the organic EL element (EL) applied to the phototherapy device of the present invention, a preferred embodiment is a tandem structure in which two or more organic functional layer units including a light emitting layer are laminated.

  Hereinafter, a basic configuration of an organic EL element having a tandem structure applicable to the present invention will be described with reference to the drawings. However, the configuration of the organic EL element according to the present invention is not limited to the configuration shown by using a specific example. Details of each component will be described later.

  As shown in FIG. 4, the organic EL device according to the present invention has a first electrode (3) and a second electrode (6) on a flexible substrate (1), and the first electrode (3) and the second electrode (2). At least one of the electrodes (6) is a transparent electrode (3) electrode, and the organic functional layer unit (4) composed of the organic functional layers (22 and 24) including the light emitting layer (23) is connected to the first electrode ( 3) and a structure in which two or more layers are laminated between the second electrode (6) is a preferred embodiment, and moreover, two or more organic functional layer units are separated by an intermediate electrode layer. It is preferable that the intermediate electrode layer has an independent connection terminal for obtaining an electrical connection.

<2.1: Organic EL element (embodiment A)>
The organic EL element according to the present invention shown in FIG. 5 is a schematic cross-sectional view showing an example of a tandem structure having two organic functional layer units (4-A and 4-B). In the drawings used in the following description, the description of the sealing adhesive layer (13) and the flexible sealing substrate (14) is omitted.

  In FIG. 5, the organic EL element (EL) has the first electrode (3) and the second electrode (6) disposed on the flexible substrate (1) at positions facing each other. The configuration shown in FIG. 4 shows a case where the first electrode (3) is an anode that is a transparent electrode and the second electrode (6) is a cathode.

  Between the 1st electrode (3, anode) and the 2nd electrode (6, cathode), the 1st organic functional layer unit (4-A) comprised from the organic functional layer containing a luminescent layer and the 2nd The organic functional layer unit (4-B) is sandwiched, and an intermediate electrode layer (5) having independent connection terminals (not shown) is disposed between the organic functional layer units.

  Each of the first electrode (3) and the intermediate electrode layer (5) is wired with a lead wire (11-A), and an organic function is applied by applying about 2 to 40 V as a driving voltage V1 to each connection terminal. The layer unit (4-A) emits light. Similarly, the intermediate electrode layer (5) and the second electrode (6) are also wired with lead wires (11-B), and by applying a drive voltage V2 of about 2 to 40 V to each connection terminal, The functional layer unit (4-B) emits light.

  Specifically, when driving the organic EL element (EL), the drive voltage V1 applied between the first electrode (3) and the intermediate electrode layer (5), and between the intermediate electrode layer (5) and the second electrode (6). When a DC voltage is applied, the drive voltage V2 applied to the first electrode (3) as an anode has a positive polarity, the second electrode (6) as a cathode has a negative polarity, and the voltage 2 to The voltage is applied within the range of 40 V, and an intermediate voltage between the anode and the cathode is applied to the intermediate electrode layer (5).

  The emitted light (L) emitted from the light emitting point (h) of each organic functional layer unit is taken out from the first electrode (3) side, which is a transparent electrode, and irradiated to the affected part at the time of phototherapy. In addition, the light emitted to the second electrode (6) side is reflected by the second electrode (6) surface and similarly extracted from the first electrode (3) side.

  In the phototherapeutic apparatus of the present invention having a tandem configuration in which two organic functional layer units including the light emitting layer shown in FIG. 5 are laminated and having an organic EL element with high luminous efficiency, a flexible substrate is used. (1) Light (L) in a specific wavelength range selected within a range of 400 to 2000 nm is emitted from the light emitting surface side of the surface. As a result, it is possible to irradiate a specific narrowband wavelength of emitted light (L) that is uniform and has a high therapeutic effect to a wide range of treatment sites with little influence of heat generation. It can be expected to achieve a high therapeutic effect on the treatment site.

<2.2: Organic EL element (embodiment B)>
FIG. 6 is a schematic cross-sectional view showing a configuration of an organic EL element Type B having a tandem structure having two organic functional layer units (4-A and 4-B). In addition to the above configuration shown in FIG. The structure which provided the nitrogen atom content layer (7) in the lower part of the intermediate electrode layer (5) is shown.

  By providing the nitrogen atom-containing layer (7) adjacent to the intermediate electrode layer (5), when forming the intermediate electrode layer on the nitrogen atom-containing layer (7), the metal constituting the intermediate electrode layer and nitrogen It interacts with the metal atom affinity compound contained in the atom-containing layer, the diffusion distance of metal atoms on the surface of the nitrogen atom-containing layer is reduced, and the aggregation of metal atoms at a specific location is suppressed.

  That is, a metal atom first forms a two-dimensional nucleus on the surface of a nitrogen atom-containing layer containing a compound having a nitrogen atom having an affinity for the metal atom, and a two-dimensional single crystal layer is formed around that. The film is formed by the layer growth type (Frank-van der Merwe: FM type) film growth. As a result, more excellent power efficiency and light emission lifetime can be obtained.

  In FIG. 6, the other configuration is the same as the configuration described in FIG.

  In the phototherapy device of the present invention having a tandem structure in which two organic functional layer units including a light emitting layer as shown in FIG. 6 are laminated and having an organic EL element with high light emission efficiency, a flexible substrate (1 ) Emitted light (L) in a specific wavelength range selected within a range of 400 to 2000 nm is emitted from the light emitting surface side of the surface. As a result, it is possible to irradiate a specific narrowband wavelength of emitted light (L) that is uniform and has a high therapeutic effect to a wide range of treatment sites with little influence of heat generation. It can be expected to achieve a high therapeutic effect on the treatment site.

<2.3: Organic EL element (embodiment C)>
FIG. 7 is a schematic cross-sectional view showing a configuration of an organic EL element TypeC having a tandem structure having three organic functional layer units (4-A, 4-B and 4-C).

  In FIG. 7, the organic EL element (EL) has a first electrode (3) and a second electrode (6) arranged on the flexible substrate (1) in a facing positional relationship. In the configuration of FIG. 7, a configuration example in which the first electrode (3) is an anode that is a transparent electrode and the second electrode (6) is a cathode is shown.

  Between the first electrode (3, anode) and the second electrode (6, cathode), a first organic functional layer unit (4-A) composed of an organic functional layer including a light emitting layer, a second The organic functional layer unit (4-B) and the third organic functional layer unit (4-C) are sandwiched, and independent connection terminals (not shown) are provided between the organic functional layer units. The intermediate electrode layer (5-1, 5-2) and the nitrogen atom-containing layer (7-1, 7-2) are disposed.

  Each of the first electrode (3) and the intermediate electrode layer (5-1) is wired with a lead wire (11-A), and by applying about 2 to 40V as a drive voltage V1 to each connection terminal, The organic functional layer unit (4-A) emits light. Similarly, the intermediate electrode layer (5-1) and the intermediate electrode layer (5-2) are wired with lead wires (11-B), and a drive voltage V2 of about 2 to 40 V is applied to each connection terminal. As a result, the organic functional layer unit (4-B) emits light. Similarly, the intermediate electrode layer (5-2) and the second electrode (6) are also wired with lead wires (11-C), and a drive voltage V3 of about 2 to 40 V is applied to each connection terminal. The organic functional layer unit (4-C) emits light.

  When a direct current voltage is applied as the driving voltage V1, the driving voltage V2, and the driving voltage V3 when driving the organic EL element (EL), the first electrode (3) that is the anode has a positive polarity and the first voltage that is the cathode. Two electrodes (6) are applied with a negative polarity within a voltage range of 2 to 40 V, and the first electrode (3) and the second electrode (5-2) are applied to the intermediate electrode layers (5-1 and 5-2). Apply at an intermediate voltage with 6).

  By applying each driving voltage, the emitted light (L) emitted from the light emitting point (h) of each organic functional layer unit is taken out from the first electrode (3) side which is a transparent electrode. In addition, the light emitted to the second electrode (6) side is reflected by the second electrode (6) surface and similarly extracted from the first electrode (3) side.

  In an organic EL element having a tandem structure composed of three organic functional layer units (4-A to 4-C) as shown in FIG. 7, for example, a light emitting layer constituting the organic functional layer unit (4-A) The blue light emitting compound contains a blue light emitting unit, the light emitting layer constituting the organic functional layer unit (4-B) contains a green light emitting compound to form a green light emitting unit, and the organic functional layer unit (4 The light emitting layer constituting -C) contains a red light emitting compound to form a red light emitting unit, and by appropriately adjusting each driving voltage V1 to V3, white light emission or light emission of a desired wavelength can be realized. it can.

  In the phototherapeutic apparatus of the present invention having a tandem configuration in which three organic functional layer units including a light emitting layer as shown in FIG. 7 are stacked and having an organic EL element with high luminous efficiency, a flexible substrate (1 ) Emitted light (L) in a specific wavelength range selected within a range of 400 to 2000 nm is emitted from the light emitting surface side of the surface. As a result, it is possible to irradiate a specific narrowband wavelength of emitted light (L) that is uniform and has a high therapeutic effect to a wide range of treatment sites with little influence of heat generation. It can be expected to achieve a high therapeutic effect on the treatment site.

<2.4: Organic EL element (embodiment D)>
FIG. 8 is a schematic cross-sectional view showing a configuration of an organic EL element TypeC having a tandem structure having three organic functional layer units (4-A, 4-B, and 4-C).

  The basic configuration is a configuration approximate to the organic EL element TypeC described with reference to FIG. 7, but as a bandpass filter between the flexible substrate (1) and the organic functional layer unit (4-A), The structure provided with the dielectric multilayer film layer (8) is illustrated.

  As shown in FIG. 8, the dielectric multilayer film layer (8) is disposed between the flexible substrate (1) having optical transparency and the organic functional layer unit (4-A). This dielectric multilayer film layer (8) is generated in three organic functional layer units (4-A, 4-B and 4-C), and out of the light (L) transmitted through the flexible substrate (1), The layer is provided as a microcavity that transmits only light of a specific wavelength used for treatment, and has a function of transmitting light of a specific narrowband wavelength having a half-value width of 100 nm or less, preferably a half-value width of 50 nm or less.

The dielectric multilayer film layer includes, for example, a high refractive index material layer such as niobium oxide (Nb ₂ O ₅ ), titanium oxide (TiO ₂ ), or zinc sulfide (ZnS), and silicon oxide (SiO ₂ ). A structure in which low refractive index material layers are alternately stacked with a film thickness in accordance with the resonance wavelength can be used.

  Such a dielectric multilayer film layer (8) is formed on the substrate surface of the flexible substrate (1) by a film forming method, and further, an organic function is formed on the dielectric multilayer film layer (8). Each layer constituting the layer unit (12) is sequentially formed by film formation. Such a dielectric multilayer film layer (8) has a layer structure that does not impair the flexibility of the flexible substrate (1).

  In the phototherapy device including the organic EL element shown in FIG. 8, emitted light (L) having a specific narrow band wavelength is emitted from the light emitting surface side of the flexible substrate (1). As a result, it is possible to irradiate a specific narrowband wavelength of emitted light (L) that is uniform and has high therapeutic effect over a wide range of treatment sites. It is possible to expect to achieve this.

(3. Components of organic EL elements)
Next, details of each component of each organic EL element (EL) described in FIGS. 4 to 8 will be described.

  In the organic EL device (EL) according to the present invention, as described with reference to FIG. 4, the anode (3) as the first electrode is formed on the flexible substrate (1) from the bottom, and then, for example, a hole injection layer. Organic functional layer group 1 (22) composed of a hole transport layer and the like, and light emitting layer (23), for example, organic functional layer group 2 (24) composed of an electron transport layer, an electron injection layer, and the like are laminated. Thus, a light emitting area is configured. Further, a cathode (6) as a second electrode, a sealing adhesive layer (13), and a flexible sealing substrate (14) are provided on the upper part.

  In the present invention, in particular, two organic functional layer units (4) composed of the organic functional layer group 1 (22), the light emitting layer (23) and the organic functional layer group 2 (24) are provided via the intermediate electrode. A stacked structure as described above is preferable. In the following description of the configuration, for convenience, only the configuration of one organic functional layer unit (4) is shown, and the description of the stacked tandem configuration is omitted.

  Below, the typical example of a structure of an organic EL element is shown.

(I) Anode (3) / organic functional layer unit (4) [organic functional layer group 1 (22: hole injection transport layer) / light emitting layer (23) / organic functional layer group 2 (24: electron injection transport layer) ] / Cathode (6)
(Ii) Anode (3) / organic functional layer unit (4) [organic functional layer group 1 (22: hole injecting and transporting layer) / light emitting layer (23) / organic functional layer group 2 (24: hole blocking layer / Electron injection transport layer)] / cathode (6)
(Iii) Anode (3) / organic functional layer unit (4) [organic functional layer group 1 (22: hole injection transport layer / electron blocking layer) / light emitting layer (23) / organic functional layer group 2 (24: positive Hole blocking layer / electron injecting and transporting layer)] / cathode (6)
(Iv) Anode (3) / organic functional layer unit (4) [organic functional layer group 1 (22: hole injection layer / hole transport layer) / light emitting layer (23) / organic functional layer group 2 (24: electrons) Transport layer / electron injection layer)] / cathode (6)
(V) Anode (3) / organic functional layer unit (4) [organic functional layer group 1 (22: hole injection layer / hole transport layer) / light emitting layer (23) / organic functional layer group 2 (24: positive Hole blocking layer / electron transport layer / electron injection layer)] / cathode (6)
(Vi) Anode (3) / organic functional layer unit (4) [organic functional layer group 1 (22: hole injection layer / hole transport layer / electron blocking layer) / light emitting layer (23) / organic functional layer group 2 (24: hole blocking layer / electron transport layer / electron injection layer)] / cathode (6)
Further, in the case of forming a plurality of light emitting layers, a non-light emitting intermediate layer may be provided between the light emitting layers. The intermediate layer may be a charge generation layer or a multi-photon unit configuration.

  Regarding the outline of the organic EL element applicable to the present invention, for example, JP2013-157634A, JP2013-168552A, JP2013-177361A, JP2013-187221A, JP JP 2013-191644 A, JP 2013-191804 A, JP 2013-225678 A, JP 2013-235994 A, JP 2013-243234 A, JP 2013-243236 A, JP 2013-2013 A. JP 242366, JP 2013-243371, JP 2013-245179, JP 2014-003249, JP 2014-003299, JP 2014-013910, JP 2014-014933 Gazette, JP, 2014-017494, A It can be mentioned configurations described in.

  Specific examples of the tandem organic EL element include, for example, US Pat. No. 6,337,492, US Pat. No. 7,420,203, US Pat. No. 7,473,923, US Pat. No. 6,872,472, US Pat. No. 6107734, U.S. Pat. No. 6,337,492, JP-A-2006-228712, JP-A-2006-24791, JP-A-2006-49393, JP-A-2006-49394, JP-A-2006 No. 49396, JP 2011-96679, JP 2005-340187, JP 47114424, JP 34096681, JP 3884564, JP 4213169, JP 2010-192719. Gazette, JP2009-076929 As described in JP 2008-078414 A, JP 2007-059848 A, JP 2003-272860 A, JP 2003-045676 A, International Publication No. 2005/009087, International Publication No. 2005/094130, and the like. However, the present invention is not limited to these.

  Furthermore, each layer which comprises an organic EL element is demonstrated.

(3.1: Flexible substrate)
There is no restriction | limiting in particular as a flexible substrate (1) applicable to an organic EL element (EL), For example, types, such as glass and a plastic, can be mentioned.

  The flexible substrate as used in the present invention refers to a 5 mm diameter ABS resin (acrylonitrile-butadiene-styrene copolymer resin) rod that is repeatedly wound and released 10 times, and then the substrate is cracked or chipped by visual inspection. This refers to the characteristics that are not damaged.

  The flexible substrate according to the present invention may be light transmissive or light opaque. The flexible substrate applicable to the present invention is not particularly limited, and examples thereof include a resin substrate, a thin film metal foil, and a thin plate flexible glass.

  However, in the configuration in which the light L is extracted from the flexible substrate (1) side, the flexible substrate (1) needs to be made of a transparent material, and the transparent flexible substrate (1) preferably used includes glass, quartz, and a resin substrate. Can be mentioned. More preferably, it is a resin substrate from the viewpoint of imparting flexibility to the organic EL element.

  Examples of the resin substrate applicable to the present invention include polyesters such as polyethylene terephthalate (abbreviation: PET), polyethylene naphthalate (abbreviation: PEN), polyethylene, polypropylene, cellophane, cellulose diacetate, and cellulose triacetate (abbreviation: TAC). Cellulose acetate butyrate, cellulose acetate propionate (abbreviation: CAP), cellulose esters such as cellulose acetate phthalate, cellulose nitrate and their derivatives, polyvinylidene chloride, polyvinyl alcohol, polyethylene vinyl alcohol, syndiotactic polystyrene, Polycarbonate (abbreviation: PC), norbornene resin, polymethylpentene, polyetherketone, polyimide, polyethersulfone ( Name: PES), polyphenylene sulfide, polysulfones, polyether imide, polyether ketone imide, polyamide, fluororesin, nylon, polymethyl methacrylate, acrylic and polyarylates, Arton (trade name, manufactured by JSR) and Appel (product) Name, manufactured by Mitsui Chemicals, Inc.) and the like.

  Among these resin substrates, films such as polyethylene terephthalate (abbreviation: PET), polybutylene terephthalate, polyethylene naphthalate (abbreviation: PEN), polycarbonate (abbreviation: PC) are flexible in terms of cost and availability. It is preferably used as a resin substrate.

  The thickness of the resin substrate is preferably a thin resin substrate within the range of 3 to 200 μm, more preferably within the range of 10 to 150 μm, and particularly preferably within the range of 20 to 120 μm. is there.

  Moreover, the thin plate flexible glass applicable as the flexible substrate according to the present invention is a glass plate that is thin enough to be bent. The thickness of the thin flexible glass can be appropriately set within the range where the thin flexible glass exhibits flexibility.

  Examples of the thin flexible glass include soda-lime glass, barium / strontium-containing glass, lead glass, aluminosilicate glass, borosilicate glass, barium borosilicate glass, and quartz. As thickness of thin plate flexible glass, it is the range of 5-300 micrometers, for example, Preferably it is the range of 20-150 micrometers.

  The material for forming the thin film metal foil is, for example, one or more metals selected from the group consisting of stainless steel, iron, copper, aluminum, magnesium, nickel, zinc, chromium, titanium, molybdenum, silicon, germanium, and tantalum. The thing which consists of alloys is mentioned. The thickness of the thin film metal foil can be appropriately set within a range in which the thin film metal foil exhibits flexibility, and is, for example, in the range of 10 to 100 μm, and preferably in the range of 20 to 60 μm.

(3.2: 1st electrode: anode)
As an anode constituting the organic EL element, a metal such as Ag or Au or an alloy containing a metal as a main component, a CuI or indium-tin composite oxide (ITO), a metal oxide such as SnO ₂ and ZnO can be cited. However, a metal or a metal-based alloy is preferable, and silver or a silver-based alloy is more preferable.

  When the transparent anode is composed mainly of silver, the silver purity is preferably 99% or more. Further, palladium (Pd), copper (Cu), gold (Au), or the like may be added to ensure the stability of silver.

  The transparent anode is a layer composed mainly of silver, but specifically, it may be formed of silver alone or an alloy containing silver (Ag). Examples of such an alloy include silver-magnesium (Ag-Mg), silver-copper (Ag-Cu), silver-palladium (Ag-Pd), silver-palladium-copper (Ag-Pd-Cu), silver -Indium (Ag-In) etc. are mentioned.

  Among the constituent materials constituting the anode, the anode constituting the organic EL device according to the present invention is a transparent anode composed mainly of silver and having a thickness in the range of 2 to 20 nm. Preferably, the thickness is more preferably in the range of 4 to 12 nm. A thickness of 20 nm or less is preferable because the absorption component and reflection component of the transparent anode can be kept low and high light transmittance can be maintained.

  In the present invention, the layer composed mainly of silver means that the silver content in the transparent anode is 60% by mass or more, preferably the silver content is 80% by mass or more, More preferably, the silver content is 90% by mass or more, and particularly preferably the silver content is 98% by mass or more. The term “transparent” in the transparent anode according to the present invention means that the light transmittance at a wavelength of 550 nm is 50% or more.

  The transparent anode may have a configuration in which a layer composed mainly of silver is divided into a plurality of layers as necessary.

  Further, in the present invention, when the anode is a transparent anode composed mainly of silver, a base layer may be provided at the lower portion from the viewpoint of improving the uniformity of the silver film of the transparent anode to be formed. preferable. Although there is no restriction | limiting in particular as a base layer, It is preferable that it is a layer containing the organic compound which has a nitrogen atom or a sulfur atom, and the method of forming a transparent anode on the said base layer is a preferable aspect.

(3.3: Intermediate electrode)
In the organic EL device according to the present invention, having a structure in which two or more organic functional layer units composed of an organic functional layer group and a light emitting layer are laminated between an anode and a cathode is a major feature. In order to obtain electrical connection between two or more organic functional layer units, it is preferable to adopt a structure in which the intermediate electrode layer units having independent connection terminals are separated.

  Also for the intermediate electrode, the material for forming the first electrode (3, anode) described above can be used in the same manner.

(3.4: Light emitting layer)
In the light emitting layer (23) constituting the organic EL element (EL), a phosphorescent light emitting compound or a fluorescent compound can be used as the light emitting material. In the present invention, in particular, a phosphorescent light emitting compound is used as the light emitting material. The contained structure is preferable.

  This light emitting layer is a layer that emits light by recombination of electrons injected from the electrode or the electron transport layer and holes injected from the hole transport layer, and the light emitting portion is in the layer of the light emitting layer. Alternatively, it may be the interface between the light emitting layer and the adjacent layer.

  As such a light emitting layer, there is no restriction | limiting in particular in the structure, if the light emitting material contained satisfy | fills the light emission requirements. Moreover, there may be a plurality of layers having the same emission spectrum and emission maximum wavelength. In this case, it is preferable to have a non-light emitting intermediate layer between the light emitting layers.

  The total thickness of the light emitting layers is preferably in the range of 1 to 100 nm, and more preferably in the range of 1 to 30 nm because a lower driving voltage can be obtained. In addition, the sum total of the thickness of a light emitting layer is the thickness also including the said intermediate | middle layer, when a nonluminous intermediate | middle layer exists between light emitting layers.

  For the light emitting layer as described above, a light emitting material and a host compound to be described later may be used by publicly known methods such as a vacuum deposition method, a spin coating method, a casting method, an LB method (Langmuir-Blodget, Langmuir Broadgett method), and an ink jet method. Can be formed.

  In the light emitting layer, a plurality of light emitting materials may be mixed, and a phosphorescent light emitting material and a fluorescent light emitting material (also referred to as a fluorescent dopant or a fluorescent compound) may be mixed and used in the same light emitting layer. The structure of the light-emitting layer preferably includes a host compound (also referred to as a light-emitting host) and a light-emitting material (also referred to as a light-emitting dopant compound), and emits light from the light-emitting material.

<Host compound>
As the host compound contained in the light emitting layer, a compound having a phosphorescence quantum yield of phosphorescence emission at room temperature (25 ° C.) of less than 0.1 is preferable. Further, the phosphorescence quantum yield is preferably less than 0.01. Moreover, it is preferable that the volume ratio in the layer is 50% or more among the compounds contained in a light emitting layer.

  As the host compound, a known host compound may be used alone, or a plurality of types of host compounds may be used. By using a plurality of types of host compounds, it is possible to adjust the movement of charges, and the efficiency of the organic electroluminescent device can be improved. In addition, by using a plurality of kinds of light emitting materials described later, it is possible to mix different light emission, thereby obtaining an arbitrary light emission color.

  The host compound used in the light emitting layer may be a conventionally known low molecular compound or a high molecular compound having a repeating unit, and a low molecular compound having a polymerizable group such as a vinyl group or an epoxy group (evaporation polymerizable light emitting host). )

  Examples of the host compound applicable to the present invention include, for example, JP-A Nos. 2001-257076, 2001-357777, 2002-8860, 2002-43056, 2002-105445, 2002-352957, 2002-231453, 2002-234888, 2002-260861, 2002-305083, US Patent Application Publication No. 2005/0112407, US Patent Application Publication No. 2009/0030202, International Publication No. 2001/039234, International Publication No. 2008/056746, International Publication No. 2005/089025, International Publication No. 2007/063754, International Publication No. 2005/030900, International Publication 2009 No. 086028, WO 2012/023947, can be mentioned JP 2007-254297, JP-European compounds described in Japanese Patent No. 2034538 Pat like.

<Light emitting material>
As a light-emitting material that can be used in the present invention, a phosphorescent compound (also referred to as a phosphorescent compound, a phosphorescent material, or a phosphorescent dopant) and a fluorescent compound (both a fluorescent compound or a fluorescent material) are used. In particular, it is preferable to use a phosphorescent compound from the viewpoint of obtaining high luminous efficiency.

<Phosphorescent compound>
A phosphorescent compound is a compound in which light emission from an excited triplet is observed. Specifically, it is a compound that emits phosphorescence at room temperature (25 ° C.), and the phosphorescence quantum yield is 0 at 25 ° C. A preferred phosphorescence quantum yield is 0.1 or more, although it is defined as 0.01 or more compounds.

  The phosphorescence quantum yield can be measured by the method described in Spectroscopic II, page 398 (1992 edition, Maruzen) of Experimental Chemistry Course 4 of the 4th edition. The phosphorescence quantum yield in the solution can be measured using various solvents, but when using a phosphorescent compound in the present invention, the phosphorescence quantum yield is 0.01 or more in any solvent. Should be achieved.

  The phosphorescent compound can be appropriately selected from known compounds used for the light emitting layer of a general organic EL device, but preferably contains a group 8-10 metal in the periodic table of elements. More preferred are iridium compounds, more preferred are iridium compounds, osmium compounds, platinum compounds (platinum complex compounds) or rare earth complexes, and most preferred are iridium compounds.

  In the present invention, at least one light emitting layer may contain two or more phosphorescent compounds, and the concentration ratio of the phosphorescent compound in the light emitting layer varies in the thickness direction of the light emitting layer. It may be an embodiment.

  Specific examples of known phosphorescent compounds that can be used in the present invention include compounds described in the following documents.

Nature 395, 151 (1998), Appl. Phys. Lett. 78,
1622 (2001), Adv. Mater. 19, 739 (2007), Chem. Mater. 17, 3532 (2005), Adv. Mater. 17, 1059 (2005), International Publication No. 2009/100991, International Publication No. 2008/101842, International Publication No. 2003/040257, US Patent Application Publication No. 2006/835469, US Patent Application Publication No. 2006 /. Examples thereof include compounds described in US Patent No. 0202194, US Patent Application Publication No. 2007/0087321, US Patent Application Publication No. 2005/0244673, and the like.

  Inorg. Chem. 40, 1704 (2001), Chem. Mater. 16, 2480 (2004), Adv. Mater. 16, 2003 (2004), Angew. Chem. lnt. Ed. 2006, 45, 7800, Appl. Phys. Lett. 86, 153505 (2005), Chem. Lett. 34, 592 (2005), Chem. Commun. 2906 (2005), Inorg. Chem. 42, 1248 (2003), International Publication No. 2009/050290, International Publication No. 2009/000673, US Pat. No. 7,332,232, US Patent Application Publication No. 2009/0039776, US Pat. No. 6,687,266, US Patent Application Publication No. 2006/0008670, US Patent Application Publication No. 2008/0015355, US Pat. No. 7,396,598, US Patent Application Publication No. 2003/0138667, US Pat. No. 7090928 And the like.

  Also, Angew. Chem. lnt. Ed. 47, 1 (2008), Chem. Mater. 18, 5119 (2006), Inorg. Chem. 46, 4308 (2007), Organometallics 23, 3745 (2004), Appl. Phys. Lett. 74, 1361 (1999), International Publication No. 2006/056418, International Publication No. 2005/123873, International Publication No. 2005/123873, International Publication No. 2006/082742, US Patent Application Publication No. 2005/0260441. U.S. Pat. No. 7,534,505, U.S. Patent Application Publication No. 2007/0190359, U.S. Pat. No. 7,338,722, U.S. Pat. No. 7,279,704, U.S. Patent Application Publication No. 2006/103874, etc. Mention may also be made of the compounds described.

  Furthermore, International Publication No. 2005/076380, International Publication No. 2008/140115, International Publication No. 2011/134013, International Publication No. 2010/086089, International Publication No. 2012/020327, International Publication No. 2011/051404. Further, compounds described in International Publication No. 2011/073149, JP2009-114086, JP2003-81988, JP2002-363552, and the like can also be mentioned.

  In the present invention, preferred phosphorescent compounds include organometallic complexes having Ir as a central metal. More preferably, a complex containing at least one coordination mode of a metal-carbon bond, a metal-nitrogen bond, a metal-oxygen bond, or a metal-sulfur bond is preferable.

  The phosphorescent compound described above (also referred to as a phosphorescent metal complex) is described in, for example, Organic Letter, vol. 16, 2579-2581 (2001), Inorganic Chemistry, Vol. 30, No. 8, 1685-1687 (1991), J. Am. Am. Chem. Soc. , 123, 4304 (2001), Inorganic Chemistry, Vol. 40, No. 7, 1704-1711 (2001), Inorganic Chemistry, Vol. 41, No. 12, 3055-3066 (2002) , New Journal of Chemistry. 26, 1171 (2002), European Journal of Organic Chemistry, 4, 695-709 (2004), and methods disclosed in the references described in these documents. Can be synthesized.

<Fluorescent compound>
Fluorescent compounds include coumarin dyes, pyran dyes, cyanine dyes, croconium dyes, squalium dyes, oxobenzanthracene dyes, fluorescein dyes, rhodamine dyes, pyrylium dyes, perylene dyes, stilbene dyes. And dyes, polythiophene dyes, and rare earth complex phosphors.

(3.5: Organic functional layer group)
Next, each layer constituting the organic functional layer unit will be described in the order of a charge injection layer, a hole transport layer, an electron transport layer, and a blocking layer.

<Charge injection layer>
The charge injection layer is a layer provided between the electrode and the light emitting layer in order to lower the driving voltage and improve the light emission luminance. “The organic EL element and its industrialization front line (November 30, 1998, NT. The details are described in Chapter 2, “Electrode Material” (pages 123 to 166) of the second edition of “S. Co., Ltd.”, and there are a hole injection layer and an electron injection layer.

  In general, the charge injection layer is present between the anode and the light emitting layer or the hole transport layer in the case of a hole injection layer, and between the cathode and the light emitting layer or the electron transport layer in the case of an electron injection layer. However, the present invention is characterized in that the charge injection layer is disposed adjacent to the transparent electrode. When used in an intermediate electrode, it is sufficient that at least one of the adjacent electron injection layer and hole injection layer satisfies the requirements of the present invention.

  The hole injection layer is a layer disposed adjacent to the anode, which is a transparent electrode, in order to lower the driving voltage and improve the luminance of light emission. “The organic EL element and its industrialization front line (November 30, 1998 (Issued by TS Co., Ltd.) ”, Chapter 2“ Electrode Materials ”(pages 123 to 166) in the second volume.

  The details of the hole injection layer are described in JP-A-9-45479, 9-260062, 8-28869, etc., and these compounds can be used for the hole injection layer. it can.

  In addition, hexaazatriphenylene derivatives such as those described in JP-A-2003-519432 and JP-A-2006-135145 can also be used as a hole transport material.

  The electron injection layer is a layer provided between the cathode and the light emitting layer for lowering the driving voltage and improving the light emission luminance. When the cathode is composed of the transparent electrode according to the present invention, Chapter 2 “Electrode materials” (pages 123-166) of the second edition of “Organic EL elements and their forefront of industrialization” (published on November 30, 1998 by NTT) ) Is described in detail.

  The details of the electron injection layer are described in JP-A-6-325871, JP-A-9-17574, JP-A-10-74586, and the like. It can be preferably used. The electron injection layer is desirably a very thin film, and although depending on the constituent material, the layer thickness is preferably in the range of 1 nm to 10 μm.

<Hole transport layer>
The hole transport layer is made of a hole transport material having a function of transporting holes. In a broad sense, the hole injection layer and the electron blocking layer also have the function of a hole transport layer. The hole transport layer can be provided as a single layer or a plurality of layers.

  The hole transport material has any of hole injection or transport and electron barrier properties, and may be either organic or inorganic.

  As the hole transport material, those described above can be used, but porphyrin compounds, aromatic tertiary amine compounds and styrylamine compounds can be used, and in particular, aromatic tertiary amine compounds can be used. preferable.

  For the hole transport layer, known methods such as vacuum deposition, spin coating, casting, printing including ink jet, and LB (Langmuir Brodget, Langmuir Broadgett) are used as the hole transport material. Thus, it can be formed by thinning. Although there is no restriction | limiting in particular about the layer thickness of a positive hole transport layer, Usually, about 5 nm-5 micrometers, Preferably it is the range of 5-200 nm. The hole transport layer may have a single layer structure composed of one or more of the above materials.

  Moreover, p property can also be made high by doping the material of a positive hole transport layer with an impurity. Examples thereof include JP-A-4-297076, JP-A-2000-196140, 2001-102175 and J.P. Appl. Phys. 95, 5773 (2004), and the like.

  Thus, it is preferable to increase the p property of the hole transport layer because an element with lower power consumption can be manufactured.

<Electron transport layer>
The electron transport layer is made of a material having a function of transporting electrons, and in a broad sense, an electron injection layer and a hole blocking layer are also included in the electron transport layer. The electron transport layer can be provided as a single layer structure or a stacked structure of a plurality of layers.

  In the electron transport layer having a single-layer structure and the electron transport layer having a multilayer structure, an electron transport material (also serving as a hole blocking material) constituting a layer portion adjacent to the light emitting layer is used as an electron transporting material. What is necessary is just to have the function to transmit. As such a material, any one of conventionally known compounds can be selected and used. Examples include nitro-substituted fluorene derivatives, diphenylquinone derivatives, thiopyran dioxide derivatives, carbodiimides, fluorenylidenemethane derivatives, anthraquinodimethane, anthrone derivatives, and oxadiazole derivatives. Furthermore, in the above oxadiazole derivative, a thiadiazole derivative in which the oxygen atom of the oxadiazole ring is substituted with a sulfur atom, and a quinoxaline derivative having a quinoxaline ring known as an electron-withdrawing group can also be used as a material for the electron transport layer. it can. Furthermore, a polymer material in which these materials are introduced into a polymer chain, or a polymer material having these materials as a polymer main chain can also be used.

In addition, metal complexes of 8-quinolinol derivatives such as tris (8-quinolinol) aluminum (abbreviation: Alq ₃ ), tris (5,7-dichloro-8-quinolinol) aluminum, tris (5,7-dibromo-8- Quinolinol) aluminum, tris (2-methyl-8-quinolinol) aluminum, tris (5-methyl-8-quinolinol) aluminum, bis (8-quinolinol) zinc (abbreviation: Znq), etc. and the central metal of these metal complexes A metal complex replaced with In, Mg, Cu, Ca, Sn, Ga, or Pb can also be used as a material for the electron transport layer.

  The electron transport layer can be formed by thinning the above material by a known method such as a vacuum deposition method, a spin coating method, a casting method, a printing method including an inkjet method, and an LB method. Although there is no restriction | limiting in particular about the layer thickness of an electron carrying layer, Usually, about 5 nm-5 micrometers, Preferably it exists in the range of 5-200 nm. The electron transport layer may have a single structure composed of one or more of the above materials.

<Blocking layer>
The blocking layer includes a hole blocking layer and an electron blocking layer, and is a layer provided as necessary in addition to the constituent layers of the organic functional layer unit 3 described above. For example, it is described in JP-A Nos. 11-204258, 11-204359, and “Organic EL elements and their forefront of industrialization” (issued by NTT, Inc. on November 30, 1998). Hole blocking (hole block) layer and the like.

  The hole blocking layer has a function of an electron transport layer in a broad sense. The hole blocking layer is made of a hole blocking material that has a function of transporting electrons but has a very small ability to transport holes, and recombines electrons and holes by blocking holes while transporting electrons. Probability can be improved. Moreover, the structure of an electron carrying layer can be used as a hole-blocking layer as needed. The hole blocking layer is preferably provided adjacent to the light emitting layer.

  On the other hand, the electron blocking layer has a function of a hole transport layer in a broad sense. The electron blocking layer is made of a material that has the ability to transport holes and has a very small ability to transport electrons. By blocking holes while transporting holes, the probability of recombination of electrons and holes is improved. Can be made. Moreover, the structure of a positive hole transport layer can be used as an electron blocking layer as needed. The layer thickness of the hole blocking layer applied to the present invention is preferably in the range of 3 to 100 nm, more preferably in the range of 5 to 30 nm.

(3.6: Second electrode: Cathode)
The cathode is an electrode film that functions to supply holes to the organic functional layer group and the light emitting layer, and a metal, an alloy, an organic or inorganic conductive compound, or a mixture thereof is used. Specifically, gold, aluminum, silver, magnesium, lithium, magnesium / copper mixture, magnesium / silver mixture, magnesium / aluminum mixture, magnesium / indium mixture, indium, lithium / aluminum mixture, rare earth metal, ITO, ZnO, TiO Oxide semiconductors such as ₂ and SnO ₂ .

  The cathode can be produced by forming a thin film of these conductive materials by a method such as vapor deposition or sputtering. The sheet resistance as the second electrode is preferably several hundred Ω / □ or less, and the film thickness is usually selected in the range of 5 nm to 5 μm, preferably 5 to 200 nm.

  In the case where the organic EL element is a double-sided light emitting type in which the emitted light L is extracted also from the cathode side, a cathode having good light transmittance may be selected and configured.

(3.7: Sealing member)
Examples of the sealing means used for sealing the organic EL element include a method of bonding a flexible sealing member, a cathode and a transparent substrate with a sealing adhesive.

  As a sealing member, it should just be arrange | positioned so that the display area | region of an organic EL element may be covered, and it may be concave plate shape or flat plate shape. Further, transparency and electrical insulation are not particularly limited.

  Specifically, a thin film glass plate, a polymer plate, a film, a metal film (metal foil) having flexibility, and the like can be given. Examples of the glass plate include soda-lime glass, barium / strontium-containing glass, lead glass, aluminosilicate glass, borosilicate glass, barium borosilicate glass, and quartz. Examples of the polymer plate include polycarbonate, acrylic, polyethylene terephthalate, polyether sulfide, and polysulfone. Examples of the metal film include one or more metals or alloys selected from the group consisting of stainless steel, iron, copper, aluminum, magnesium, nickel, zinc, chromium, titanium, molybdenum, silicon, germanium, and tantalum.

In the present invention, as the sealing member, a polymer film and a metal film can be preferably used from the viewpoint that the organic EL element can be thinned. Further, the polymer film has a water vapor transmission rate of 1 × 10 ⁻³ g / m ² .multidot.m at a temperature of 25 ± 0.5 ° C. and a relative humidity of 90 ± 2% RH measured by a method according to JIS K 7129-1992. The oxygen permeability measured by a method according to JIS K 7126-1987 is preferably 1 × 10 ⁻³ ml / m ² · 24 h · atm (1 atm is 1.01325 × 10 ⁵ a Pa) equal to or lower than a temperature of 25 ± 0.5 ° C., water vapor permeability at a relative humidity of 90 ± 2% RH is preferably not more than ^{1 × 10 -3 g / m 2} · 24h.

  In the gap between the sealing member and the display area (light emitting area) of the organic EL element, an inert gas such as nitrogen or argon, or an inert liquid such as fluorocarbon or silicon oil is injected in the gas phase and liquid phase. You can also Further, the gap between the sealing member and the display area of the organic EL element can be evacuated, or a hygroscopic compound can be sealed in the gap.

  Further, the organic EL element is transparent in a state that completely covers the light emitting functional layer unit and exposes the terminal portions of the anode (3) as the first electrode and the cathode (6) as the second electrode in the organic EL element. A sealing film can also be provided on the substrate.

  The sealing material as described above is provided in a state in which the terminal portions of the anode (3) as the first electrode and the cathode (6) as the second electrode in the organic EL element are exposed and at least the light emitting functional layer is covered. It has been.

(4) Manufacturing method of organic EL element As a manufacturing method of the organic EL element, an anode, an organic functional layer group 1, a light emitting layer, an organic functional layer group 2 and a cathode are laminated on a transparent substrate to form a laminate. To do.

  First, a transparent substrate is prepared, and a thin film made of a desired electrode material, for example, an anode material, is deposited on the transparent substrate so as to have a thickness of 1 μm or less, preferably within a range of 10 to 200 nm. The anode is formed by a method such as sputtering. At the same time, a connection electrode portion connected to an external power source is formed at the anode end portion.

  Next, a hole injection layer and a hole transport layer constituting the organic functional layer group 1, a light emitting layer, an electron transport layer constituting the organic functional layer group 2, and the like are sequentially laminated thereon.

The formation of each of these layers includes spin coating, casting, inkjet, vapor deposition, and printing, but vacuum vapor deposition is easy because a homogeneous layer is easily obtained and pinholes are difficult to generate. The method or spin coating method is particularly preferred. Further, different formation methods may be applied for each layer. When employing a vapor deposition method for forming each of these layers, the vapor deposition conditions vary depending on the type of compound used, but generally a boat heating temperature of 50 to 450 ° C. and a degree of vacuum of 1 × 10 ⁻⁶ to 1 × 10 ⁻² Pa. It is desirable to appropriately select the respective conditions within the ranges of the deposition rate of 0.01 to 50 nm / second, the substrate temperature of −50 to 300 ° C., and the layer thickness of 0.1 to 5 μm.

  After the organic functional layer group 2 is formed as described above, a cathode is formed thereon by an appropriate formation method such as vapor deposition or sputtering. At this time, the cathode is patterned in a shape in which terminal portions are drawn from the upper side of the organic functional layer group to the periphery of the transparent substrate while maintaining an insulating state with respect to the anode by the organic functional layer group.

  After forming the cathode, the transparent base material, the anode, the organic functional layer group, the light emitting layer, and the cathode are sealed with a sealing material. That is, a sealing material covering at least the organic functional layer group is provided on the transparent substrate with the terminal portions of the anode and the cathode exposed.

[3: Thin battery]
Subsequently, the thin battery which comprises the phototherapy apparatus of this invention is demonstrated.

  As a thin battery applicable to the present invention, any battery can be applied as long as it has a thickness of 1.5 mm or less, and it may be a primary battery or a secondary battery. Examples include alkaline storage batteries, organic electrolyte batteries, solar batteries, etc. In the present invention, among them, organic electrolyte batteries, more preferably lithium batteries are preferable, and lithium having a thickness of 1.5 mm or less is particularly preferable. An ion battery is preferred. That is, in the present invention, it is preferable to use a lithium ion battery in that it is possible to supply sufficient power for driving the organic EL element even if the lithium ion battery is thinned to 1.5 mm or less.

(Lithium ion secondary battery)
In a thin battery, the active material of the positive electrode contains manganese, the active material layer of at least one of the positive electrode and the negative electrode contains a softening agent, and the internal pressure of the lithium ion battery is in the range of 100 to 1000 Pa. A secondary battery is preferred.

  FIG. 9 shows a configuration of a thin lithium ion secondary battery which is an example of the thin battery according to the present invention.

  In the lithium ion secondary battery (50) which is a preferable example of the thin battery (104) shown in FIG. 9, the thickness T is 1.5 mm or less, preferably 1.0 mm or less, more preferably 0.5 mm. It is the following and it is preferable that it has flexibility.

  When the thin battery according to the present invention is a thin lithium ion secondary battery, the lithium ion secondary battery (50) includes a positive electrode current collector (51) and a positive electrode active material layer (52) as shown in FIG. The electrolyte layer (53), the separator (54), the electrolyte layer (53), the negative electrode active material layer (55), and the negative electrode current collector (56) are laminated, and the periphery is sealed with a sealing material (57). The configuration is stopped. An extraction tag (21a and 26a: electrode terminal) is connected to the positive electrode current collector (51) and the negative electrode current collector (56), and the extraction tag (51a and 56a: electrode terminal) is connected to a sealing material (57 ) Extending outside.

  The thickness T of the lithium ion secondary battery (50) including the sealing material (57) is 1.5 mm or less.

For the electrolyte layer (53), an electrolyte solution in which an electrolyte such as LiPF ₆ is dissolved in a solvent such as a mixed solvent of EC (ethylene carbonate) and EMC (ethyl methyl carbonate) can be used.

  Further, the electrolyte layer (53) may be polymerized in order to prevent the electrolyte layer (53) from being broken and the electrolyte solution from leaking against the bending of the flexible secondary battery. For example, the electrolyte layer (53) can be made into a polymer gel by including the electrolyte solution in a polymer polymer such as polyethylene oxide or polyvinylidene fluoride.

  The negative electrode active material layer (55) is made of a conventionally known negative electrode active material. For example, it is composed of an active material such as graphite, a binder, an additive, and the like, and silicon is added as necessary. As the binder of the negative electrode active material layer (55), for example, SBR (styrene butadiene latex) can be used. As an additive of the negative electrode active material layer (55), for example, carboxymethyl cellulose (CMC) which is a thickener can be used.

  For the positive electrode current collector (51), a conventionally known material for a positive electrode current collector such as Al can be used.

  For the negative electrode current collector (56), a conventionally known material for a negative electrode current collector, such as Cu, can be used.

  For the separator (54), for example, polyolefin such as polypropylene and polyethylene can be used.

  As the sealing material (57), a conventionally known sealing material such as multilayer Al and PET (polyethylene terephthalate) film can be used.

A positive electrode active material, a binder, an additive, etc. are used for a positive electrode active material layer (52). It is preferable to use lithium oxide for the positive electrode active material. Examples of the lithium oxide material of the positive electrode active material include LiCoO ₂ , Li (Ni, Co, Mn) O ₂ , LiNi _1/3 Co _1/3 Mn _1/3 O ₂ , LiNiO ₂ , LiFePO ₄ , and Li excess oxidation. A thing etc. can be used. Moreover, you may use a sulfur compound as a positive electrode active material. As an additive of the positive electrode active material layer (52), for example, acetylene black which is a conductive agent can be used.

  In addition, in a thin lithium ion secondary battery (50) of 0.5 mm or less, in order to drive the organic EL element (EL), it is preferable to increase the capacity and output of the battery. The increase in capacity of the lithium ion secondary battery (50) can be achieved by increasing the capacity of the positive electrode.

  In order to increase the capacity of the positive electrode, a positive electrode active material containing Mn is used as the positive electrode active material layer (52).

Examples of the positive electrode active material containing Mn include Li (Mn, Co, Ni) O ₂ , LiMnO ₂ , Li (Li, Mn) _1-x Co _x O _2, and Li ₂ MnO ₃ .

By using the positive electrode active material containing Mn, the capacity of the positive electrode can be increased as compared with a positive electrode active material not containing Mn (for example, LiCoO ₂ or the like).

  More preferably, lithium-excess Mn oxide is used as the positive electrode active material.

In Li (Mn, Co, Ni) O ₂ and LiMnO ₂ , the theoretical capacity is about 150 mAh / g.

On the other hand, when Li (Li, Mn) _1-x Co _x O ₂ or Li ₂ MnO _3, which is an excess Mn oxide of lithium, is used as the positive electrode active material, the theoretical capacity is about 250 to 400 mAh / g. To improve.

  In addition, the lithium ion secondary battery (50) preferably has high flexibility. The standard of flexibility is a bending radius of 100 mm or less, preferably a bending radius of 30 mm to 3 mm.

  In order to give flexibility to the lithium ion secondary battery (50), it is preferable to reduce the package pressure when sealing the secondary battery. For example, the package decompression degree of the lithium ion secondary battery is set to 100 to 1000 Pa. More preferably, it is the range of 200-800 Pa, Most preferably, it is 500 Pa.

  In order to improve the flexibility of the lithium ion secondary battery (50), the positive electrode active material layer (52) may contain a binder (softener). More preferably, an acrylic polymer or a diene polymer is preferably used as the softening agent that is a binder. A copolymer of an acrylic polymer or a diene polymer and another binder material may be formed. By using an acrylic polymer or a diene polymer as a softening agent, flexibility can be improved as compared with the case of using other binder materials.

  Specific examples of the acrylic polymer and the diene polymer include butadiene, PTFE (polytetrafluoroethylene), VDF (vinylidene fluoride), TFE (tetrafluoroethylene), and the like.

  Specifically, for example, BM-400 manufactured by Nippon Zeon Co., Ltd. can be used as the binder.

  As a power feeding method to the lithium ion secondary battery (50), wireless power feeding such as an electromagnetic induction method or an electromagnetic resonance method may be used.

  As described above, the lithium ion secondary battery used in the present invention contains Mn as the positive electrode active material of the positive electrode active material layer, the package decompression degree inside the sealing material is 100 to 1000 Pa, and the positive electrode A configuration in which a softener is contained as a binder in the active material layer or the negative electrode active material layer is preferable from the viewpoint of obtaining high capacity and sufficient flexibility.

(Lithium ion primary battery)
Moreover, as a thin battery, the active material of the positive electrode contains manganese, the active material layer of at least one of the positive electrode and the negative electrode contains a softening agent, and the internal pressure reduction degree is in the range of 100 to 1000 Pa. An ion primary battery can also be used. When the thin battery is a lithium ion primary battery, the lithium ion secondary battery described above has the same configuration except that the negative electrode active material is Li. It can be implemented.

  Examples of the lithium ion primary battery include FDK CF042039 (nominal voltage 3.0 V, discharge capacity 18 mAh, thickness 0.45 mm) and CF042722 (nominal voltage 3.0 V, discharge capacity 11 mAh, thickness 0.45 mm). Is mentioned.

[Connecting member]
Next, in the phototherapy device of the present invention, a method for connecting a light emitting light emitting diode and a thin battery will be described by taking an organic EL element and a lithium ion secondary battery as an example.

(Organic EL element and lithium ion secondary battery are arranged in parallel)
A connection method in a configuration in which the organic EL element and the lithium ion secondary battery illustrated in FIG. 1 are arranged in parallel will be described with reference to FIG.

  FIG. 10 is a schematic cross-sectional view showing an example of a method for electrically joining an organic EL element and a lithium ion secondary battery arranged in parallel.

  As shown in FIG. 10, when the lithium ion secondary battery (50) and the organic EL element (EL) are joined, the positive electrode terminal (51a) and the negative electrode terminal (56a) on the lithium ion secondary battery (50) side. And the anode terminal (3a) and the cathode terminal (6a) from the anode on the organic EL element (EL) side, respectively, are connected by members that are electrically connected to form a connection portion (106).

  The member to be electrically connected is not particularly limited as long as it is a member having conductivity, but is preferably an anisotropic conductive film (ACF), a conductive paste, or a metal paste.

  Examples of the anisotropic conductive film (ACF) include a layer having fine conductive particles having conductivity mixed in a thermosetting resin. The conductive particle-containing layer that can be used in the present invention is not particularly limited as long as it is a layer containing conductive particles as an anisotropic conductive member, and can be appropriately selected according to the purpose. The conductive particles that can be used as the anisotropic conductive member according to the present invention are not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include metal particles and metal-coated resin particles. Examples of commercially available ACFs include low-temperature curable ACFs that can also be applied to resin films, such as MF-331 (manufactured by Hitachi Chemical).

  Examples of the metal particles include nickel, cobalt, silver, copper, gold, and palladium. These may be used individually by 1 type and may use 2 or more types together. Among these, nickel, silver, and copper are preferable. In order to prevent these surface oxidations, particles having gold or palladium on the surface may be used. Furthermore, you may use what gave the metal film and the insulating film with the organic substance on the surface.

  Examples of the metal-coated resin particles include particles in which the surface of the resin core is coated with any metal of nickel, copper, gold, and palladium. Similarly, particles obtained by applying gold or palladium to the outermost surface of the resin core may be used. Further, a resin core whose surface is coated with a metal protrusion or an organic material may be used.

  Moreover, as a metal paste, the silver particle paste, silver-palladium particle paste, gold particle paste, copper particle paste, etc. which are commercially available metal nanoparticle pastes can be selected suitably and used. Examples of the metal paste include silver pastes for organic EL element substrates (CA-6178, CA-6178B, CA-2500E, CA-2503-4, CA-2503N, CA-271, etc. sold by Daiken Chemical Co., Ltd. , Specific resistance value: 15-30 mΩ · cm, formed by screen printing method, curing temperature: 120-200 ° C., LTCC paste (PA-88 (Ag), TCR-880 (Ag), PA-Pt (Ag · Pt)), silver paste for glass substrates (US-201, UA-302, firing temperature: 430 to 480 ° C.), and the like.

(Configuration in which organic EL elements and lithium ion secondary batteries are stacked one above the other)
Next, a connection method in a configuration in which the organic EL element and the lithium ion secondary battery as illustrated in FIG. 2 are stacked one above the other will be described with reference to FIG.

  FIGS. 11A and 11B are schematic cross-sectional views illustrating an example of a method of joining a stacked organic EL element and a lithium ion secondary battery.

  As shown to (a) of FIG. 11, the arrangement position of a lithium ion secondary battery (50) is the back side of an organic EL element (EL) with a connection part (106), ie, the opposite side to the light emission surface side. Arranged on the back side. With such a configuration, the organic EL element (EL) and the thin lithium ion secondary battery (50) can be designed in a compact manner, and wiring and the like can be reduced.

  At this time, the light emitting region (103) of the organic EL element (EL) and the lithium ion secondary battery (50) are bonded together by bonding through an adhesive layer (107) as shown in FIG. It is preferable to do this. Specifically, a sealing material (13 and 57) for sealing each of the light emitting region (103) of the lithium ion secondary battery (50) and the organic EL element (EL) is interposed via the adhesive layer (107). A method of bonding can be used.

  As described above, since the organic EL element (EL) and the lithium ion secondary battery (50) are electrically connected through the connecting portion (106), the lithium ion secondary battery (50) The EL element (EL) can be driven to emit light. Further, if a sheet-like flexible lithium ion secondary battery (50) and a sheet-like flexible organic EL element (EL) are used, the light treatment has flexibility. Device (100) can be obtained. In this case, it is preferable to use a flexible adhesive layer (107). As a constituent material of such an adhesive layer (107), for example, a 3M VHB (registered trademark) acrylic foam structural bonding tape, a 3M transparent silicone resin / acrylic double-sided tape, or the like may be used. Although it can, it is not limited to these.

  Moreover, when a high-intensity treatment is required for the phototherapy device (100), a high current is required, and in this case, the organic EL element (EL) and the lithium ion secondary battery (50) generate heat. In view of efficiently dissipating the generated thermal energy, a heat conductive sheet may be disposed instead of the adhesive layer (107). A heat conductive sheet is a sheet for improving heat dissipation using heat conduction, and examples thereof include Sun Morphee (registered trademark) T300 and T400 manufactured by Sun Delta, which are thermoplastic elastomer-based heat conductive sheets. . In addition, a heat conductive sheet can serve as the function of an adhesive layer.

  Further, as shown in FIG. 11 (b), a lithium ion secondary battery (50) is directly laminated on the back side of the organic EL element (EL) without forming an adhesive layer, and the whole is a sealing member ( It is also possible to take the configuration of sealing in 13). In FIG. 11B, the description of the connecting portion (106) for electrically connecting the two is omitted.

<< Embodiment of Phototherapy Device >>
Specific examples (embodiments 1 to 4) of the phototherapy device formed by the above-described constituent members will be described with reference to the drawings.

[Embodiment 1]
First, Embodiment 1 which is an example of a configuration of a phototherapy device in which a light emitting light emitting diode and a thin battery are arranged in parallel will be described.

  FIG. 12 is a top view and a cross-sectional view for explaining in more detail the entire configuration diagram of the phototherapy device in which the light emitting light emitting diode and the thin battery described above in FIG. 1 are arranged in parallel.

  FIG. 12 (a) is a top view of the phototherapy device (1) of the present invention similar to FIG. 1 (a), and the light emitted from the organic EL element (EL) is partially emitted into the region. A light irradiation window (101) for transmitting and irradiating the affected area is formed.

  FIG. 12B shows a configuration similar to that described above with reference to FIG. 1B, and a surface substrate (102) having a light irradiation window (101) is disposed on the outermost surface. An organic EL element (EL), which is a thin light emitting diode for light irradiation, and a thin battery (104) are arranged in parallel below the surface base material (102). Both are connected by an electrically connectable connecting member (106) as described in detail with reference to FIG. 10, and driving power is supplied from the thin battery (104) to the organic EL element (EL). . Reference numeral 103 denotes a light emitting region in the organic EL element (EL).

  A flexible base material (105) for holding the organic EL element (EL) and the thin battery (104) is disposed in the lowermost layer portion.

  These phototherapy devices (100) may be further fixed to a housing or the like for holding the phototherapy device.

[Embodiment 2]
Next, Embodiment 2 which is an example of a configuration of a phototherapy device in which a light emitting light emitting diode and a thin battery are stacked one above the other will be described.

  FIG. 13 is a top view and a cross-sectional view for explaining in more detail the overall configuration diagram of the phototherapy device in which the light emitting light emitting diode and the thin battery described above with reference to FIG. 2 are stacked one above the other. .

  Similarly to FIG. 12, (a) of FIG. 13 is an overall view of the phototherapy device (100) in which the constituent members are assembled, and (b) of FIG. 13 is each constituent member of the phototherapy device (100). The arrangement of

  In FIG. 13A, a light irradiation window (101) for irradiating the affected area is provided on the entire surface base material (102) of the phototherapy device (100).

  FIG. 13B is a configuration similar to that described above with reference to FIG. 2B, and a surface base material (102) having a light irradiation window (101) on the entire surface is disposed on the outermost surface. Yes. An organic EL element (EL), which is a thin light emitting diode for light irradiation, is disposed below the surface base material (102), and a thin battery (104) is disposed on the lower surface side thereof with an adhesive layer (107) interposed therebetween. Laminated.

  The organic EL element (EL) and the thin battery (104) are bonded together by bonding through an adhesive layer (107) as illustrated in FIG.

  At this time, the organic EL element (EL) and the thin battery (104) are connected by the electrically connectable connecting member (106), and driving power is supplied from the thin battery (104) to the organic EL element (EL). Is done. Reference numeral 103 denotes a light emitting region in the organic EL element (EL).

  A flexible base material (105) for holding the organic EL element (EL) and the thin battery (104) is disposed in the lowermost layer portion.

  These phototherapy devices (100) may be further fixed to a housing or the like for holding the phototherapy device.

[Embodiment 3]
Next, Embodiment 3 which is an example of the configuration of a phototherapy device in which a plurality of light emitting light emitting diodes and thin batteries are stacked one above the other will be described.

  FIG. 14 shows a plurality of organic EL elements (EL), which are light emitting diodes for light irradiation, with respect to the phototherapy device (100) in which the light emitting light emitting diodes and thin batteries shown in FIG. It is the top view and sectional drawing of the apparatus (three in FIG. 14) and the phototherapy apparatus arranged in parallel.

  FIG. 14 (a) is an overall view of the phototherapy device (100) in which the constituent members are assembled, and FIG. 14 (b) shows the arrangement of the constituent members of the phototherapy device (100).

  In FIG. 14A, light irradiation windows (101A to 101C) for irradiating each affected area corresponding to a plurality (three in FIG. 14) of organic EL elements (LE-A to LE-C). Is provided on the entire surface of the surface base material (102) of the phototherapy device (100).

  In FIG. 14B, a surface base material (102) having a plurality of light irradiation windows (101A to 101C) on the entire surface is disposed on the outermost surface. Three thin organic EL elements (EL-A to EL-C) which are light emitting diodes for light irradiation are arranged in parallel on the same plane under the surface base material (102), and an adhesive layer is provided on the lower surface side thereof. A thin battery (104) is stacked via (107).

  As illustrated in FIG. 11, the three organic EL elements (EL-A to EL-C) and the single thin battery (104) are bonded together through an adhesive layer (107).

  At this time, each of the organic EL elements (EL-A to LE-C) and the single thin battery (104) are respectively connected by electrically connectable connection members (106A to 106C), and the thin battery ( 104), driving power is supplied to each organic EL element (EL-A to EL-C). 103A to 103C represent light emitting regions in the respective organic EL elements (EL-A to EL-C).

  The flexible base material (105) for hold | maintaining each organic EL element (EL-A-EL-C) and a thin battery (104) is arrange | positioned at the lowest layer part.

  By adopting such a configuration, the organic EL elements (EL-A to EL-C) are respectively elements having different emission wavelengths, and an optimal wavelength is selected according to the characteristics of the affected area to perform phototherapy. Can do.

[Embodiment 4]
Next, Embodiment 4 which is another example of the configuration of the phototherapy device in which a plurality of light emitting light emitting diodes and thin batteries are stacked one above the other will be described.

  FIG. 15 shows an organic EL that is a light emitting light emitting diode for the phototherapy device (100) in which a plurality of light emitting light emitting diodes shown in FIG. It is the top view and sectional drawing of the phototherapy apparatus which have arrange | positioned three light emitting units comprised with the element (EL) and the thin battery in parallel.

  FIG. 15A is an overall view of the phototherapy device (100) in which the constituent members are assembled, and FIG. 14B shows the arrangement of the constituent members of the phototherapy device (100).

  In FIG. 15 (a), similarly to FIG. 14 (a), each affected area corresponds to a plurality (three in FIG. 15) of organic EL elements (LE-A to LE-C). A light irradiation window (101A to 101C) for irradiating is provided on the entire surface substrate (102) of the phototherapy device (100).

  In FIG. 15B, a surface base material (102) having a plurality of light irradiation windows (101A to 101C) on the entire surface is disposed on the outermost surface. In the lower part of the surface base material (102), as in FIG. 14, three thin organic EL elements (EL-A to EL-C), which are light emitting diodes for light irradiation, are arranged in parallel on the same plane. . On the lower surface side, three thin batteries (104A to 104C) are stacked and arranged corresponding to each organic EL element via an adhesive layer (107).

  The three organic EL elements (EL-A to EL-C) and the three thin batteries (104A to 104C) are bonded to each other through bonding layers (107A to 107C).

  Each organic EL element (EL-A to LE-C) and thin battery (104A to 104C) are connected by electrically connectable connecting members (106A to 106C), respectively, to form three light emitting units. doing.

  Driving power is supplied from the thin batteries (104A to 104C) independently to the corresponding organic EL elements (EL-A to EL-C). 103A to 103C represent light emitting regions in the respective organic EL elements (EL-A to EL-C).

  The flexible base material (105) for hold | maintaining each organic EL element (EL-A-EL-C) and a thin battery (104) is arrange | positioned at the lowest layer part.

  With such a configuration, each organic EL element (EL-A to EL-C) is an element having a different emission wavelength, and an optimal wavelength is selected according to the characteristics of the affected area to perform phototherapy. be able to.

  The device for phototherapy of the present invention has shape compatibility (flexibility) with respect to an affected part of a curved surface to be treated, has a small calorific value at the time of phototherapy, has high emission luminance, safety (ignition prevention), and Portable phototherapy device that can be applied to any illness, syndrome, disease, symptom, or treatment of various illnesses that respond to phototherapy and cosmetic symptoms without any restrictions on the place to treat. be able to.

1 Flexible substrate 3 First electrode (anode)
4, 4-A, 4-B, 4-C Organic functional layer unit 5, 5-1, 5-2 Intermediate electrode layer 6 Second electrode (cathode)
7, 7-1, 7-2, 7-3 Nitrogen atom containing layer 8 Band pass filter 9 Dielectric multilayer film layer 10 Gas barrier layer 11-A, 11-B, 11-C Lead wire 12 Light emitting unit 13 Sealing Adhesive layer 14 Flexible sealing substrate 15, 15A, 15B Charge generation layer 22 Organic functional layer group 1
23 Light emitting layer 24 Organic functional layer group 2
DESCRIPTION OF SYMBOLS 50 Lithium ion secondary battery 51 Positive electrode collector 51a Positive electrode terminal 52 Positive electrode active material layer 53 Electrolyte layer 54 Separator 55 Negative electrode active material layer 56 Negative electrode current collector 56a Negative electrode terminal 57 Sealant 100 Phototherapy apparatus 101, 101A, 101B, 101C Light irradiation window 102 Surface base material 103, 103A, 103B, 103C Light emitting area 104, 104A, 104B, 104C Thin battery 105 Flexible base material 106, 106A, 106B, 106C Connection member 107, 107A, 107B, 107C Adhesive layer 201 LED light emitting device 202 LED light source 203 radiated light 204 light guide plate 205 reflector plate 206 diffuser plate EL, EL-A, EL-B, EL-C organic EL element L emitted light h emitting point

Claims (15)

  A light emitting diode for light irradiation and a thin battery having a thickness of 1.5 mm or less are connected, and the light emitting diode for light irradiation and the thin battery are connected by an electrically connectable connection member, and the light emission wavelength is 400 to 2000 nm. A device for phototherapy characterized by being in a wavelength range.   The phototherapy device according to claim 1, wherein the light emitting light emitting diode and the thin battery are disposed on a flexible base material.   The phototherapy device according to claim 1 or 2, wherein the thin battery is disposed on a surface opposite to a light emitting surface of the light emitting light emitting diode. The thin battery is a lithium ion secondary battery,
The active material of the positive electrode contains manganese,
The active material layer of at least one of the positive electrode and the negative electrode contains a softening agent,
The device for phototherapy according to any one of claims 1 to 3, wherein a degree of decompression inside the lithium ion secondary battery is in a range of 100 to 1000 Pa. The thin battery is a lithium ion primary battery,
The active material of the positive electrode contains manganese,
The active material layer of at least one of the positive electrode and the negative electrode contains a softening agent,
The device for phototherapy according to any one of claims 1 to 3, wherein a pressure reduction degree inside the lithium ion primary battery is in a range of 100 to 1000 Pa.   6. The phototherapy device according to claim 4, wherein the softening agent is an acrylic polymer or a diene polymer.   The said thin battery has flexibility, The phototherapy apparatus as described in any one of Claim 4-6 characterized by the above-mentioned.   The phototherapy device according to any one of claims 1 to 7, wherein the light emitting diode for light irradiation and the thin battery are bonded together.   The phototherapy device according to any one of claims 1 to 8, wherein the light emitting light emitting diode is an organic electroluminescence element.   The organic electroluminescence element is a flexible laminate in which an organic functional layer unit including a light emitting layer sandwiched between a pair of electrodes and a flexible sealing member are laminated in this order on a flexible substrate. The phototherapy device according to claim 9.   The device for phototherapy according to claim 10, wherein the organic electroluminescence element has a configuration in which two or more organic functional layer units including the light emitting layer are stacked.   The phototherapy device according to claim 10 or 11, wherein the light emitting layer contains a phosphorescent compound as a light emitting material.   The device for phototherapy according to claim 11 or 12, wherein the two or more organic functional layer units emit light having different emission maximum wavelengths.   The device for phototherapy according to claim 11 or 12, wherein the two or more organic functional layer units each emit light having the same emission maximum wavelength.   The phototherapy device according to any one of claims 1 to 14, wherein a photochemotherapeutic agent is used together with light irradiation by the light emitting light emitting diode.

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