JP2005291026A - Self-bending thin film and movement device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a self-bending thin film and a movement device which are compact and can be propelled with reliability. <P>SOLUTION: The self-bending thin film 1 is constituted so that a light-bending film 11 constructed of an azobenzene compound is arranged so that it is sandwitched between a first organic EL device LF1 and a second organic EL device LF2. The first organic EL device emits light having a wavelength of 366nm, and the second organic EL device emits light having a wavelength of 540nm. Then electric energy is alternately fed to the first organic EL device LF1 and the second organic EL device LF2, and the light having the wavelength of 366nm and the light having the wavelength of 540nm are alternately irradiated to the light-bending film 11. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a self-bending thin film and an exercise device.

  In recent years, attention has been focused on micromachines as exercise devices that can be freely propelled by imitating flagellar movements of bacteria and the like. In this type of micromachine, in particular, development of a medical micromachine for propelling in a fluid under a low Reynolds coefficient such as blood in a living body, for example, is actively performed. The medical micromachine is, for example, that a drug is loaded, and when the inside of a blood vessel is self-propelled to reach a target location, the loaded drug is separated and administered. In order to further reduce the size of the above-described micromachine, it is desired to develop a microactuator that controls the drive of the micromachine.

On the other hand, in recent years, a polymer film that has been bent by receiving an electromagnetic wave having a specific wavelength such as light has been developed (for example, see Non-Patent Document 1).
Directed bending of a polymer film by light Miniaturizing a simple photomechanical system could expand its range of application., NATURE, VIL425, 11 SEPTEMBER 2003

  By the way, in recent years, application of the optically driven polymer film described in Non-Patent Document 1 to a driving mechanism of a micromachine is being studied. However, in the light-driven polymer film described in Non-Patent Document 1, a laser is assumed as a light source of a specific wavelength, and the laser light source is arranged at a place away from the bent part. Thus, the conventional optically driven polymer film requires a long optical transmission path from the laser light source to the polymer film at the bent portion. Therefore, when the above-described conventional optically driven polymer film is applied to a micromachine, various constraints occur in terms of performance of the driving mechanism, size reduction, and weight reduction.

  This invention is made | formed in view of the said situation, The objective is to provide the self-flexing thin film and exercise | movement apparatus which are small and can be propelled reliably.

  The self-bending thin film of the present invention includes a film-shaped first light source that emits light having a first wavelength, and a film-shaped second light source that emits light having a second wavelength different from the first wavelength. And a light bending film having a bending direction different from that of the light having the first wavelength and the light having the second wavelength.

  According to this, the light bending film is alternately applied to the first light source body side and the second light source body side by alternately irradiating the light bending film with the first wavelength light and the second wavelength light. Can be bent. Therefore, by arranging the self-bending thin film thus configured in, for example, a low Reynolds number fluid and bending the light bending film alternately on the first light source side and the second light source side, The self-bending thin film can be propelled in the fluid.

In this self-bending thin film, at least one of the first light source body and the second light source body may include a film-shaped solar cell.
According to this, for example, the first light source body and the second light source body are driven by electric power generated in the solar cell. Therefore, the self-bending thin film can be promoted without supplying external power.

In the self-bending thin film, at least one of the first wavelength and the second wavelength may be 366 nm.
According to this, for example, when the second wavelength is 540 nm, the light bending film is bent when the second light having a wavelength of 540 nm is irradiated, and the light having the first wavelength of 366 nm is irradiated. When the light bending film extends straight in a plane, the first light source body and the second light source body are driven by alternately emitting light. As a result, the self-bending thin film can be promoted.

In this self-bending thin film, the light bending film may be an azobenzene compound.
According to this, since the light bending film composed of the azobenzene compound is used, a light bending film in which the bending direction is surely different from that of the light having the first wavelength and the light having the second wavelength is realized. .

In the self-bending thin film, the first light source body and the second light source body may be organic EL elements.
According to this, each light source body can be formed thinly by comprising each light source body with an organic EL element.

In this self-bending thin film, a polarizing plate may be disposed between the light source body and the light bending film.
According to this, when the wavelength of the light emitted from the light source body includes light having a wavelength that inhibits the bending control of the optical bending film, the light having the desired wavelength is blocked by blocking the light having the wavelength to inhibit. By allowing only the light to pass through, the allowable range of the wavelength of the light emitted from the light source body can be widened, and the manufacture of the light source body can be facilitated.

The self-bending thin film may include a power storage unit capable of supplying power to the light source body.
According to this, for example, even when electric energy is no longer supplied from the solar cell, electric energy can be supplied to the light source body.

The exercise device of the present invention is formed by connecting a plurality of the self-bending thin films described above in series.
According to this, a plurality of the self-bending thin films are connected in series, and the first light source body and the second light source body are controlled, so that the exercise apparatus can be reduced in size and weight. it can.

Hereinafter, a self-bending thin film and an exercise device according to an embodiment of the present invention will be described with reference to the drawings. In each of the drawings shown below, the scale of each layer and each member is different in order to make each layer and each member recognizable on the drawing.
(First embodiment)
FIG. 1 is an overall perspective view of a self-bending thin film according to a first embodiment of the present invention. As shown in FIG. 1, the self-bending thin film 1 has a length (thickness) in the Z arrow direction in FIG. 1 that is shorter than the length in the X and Y arrow directions, and the length in the Y direction is the X direction. It has a substantially strip shape longer than the length (width). The self-bending thin film 1 is a bent portion whose substantially central portion is bent, and the bent portion is represented by a region C as shown in FIG.

  FIG. 2 is an enlarged perspective view of a part of the self-bending thin film 1 including the region C shown in FIG. As shown in FIG. 2, the self-bending thin film 1 has a multilayer laminated structure in which a plurality of films (four in this embodiment) are laminated. Specifically, the self-bending thin film 1 includes a light bending film 11, a first structure layer 12, a second structure layer 13, and a solar cell 14.

  Further, the self-bending thin film 1 emits, in the region C, the first organic EL element LF1 that emits light of the first wavelength and the light of the second wavelength different from the first wavelength. And a second organic EL element LF2. Each of the first and second organic EL elements LF1 and LF2 is a film-shaped light source body having substantially the same length as the width (length in the X direction) of the self-bending thin film 1. The first organic EL element LF1 is formed and supported and fixed so as to be embedded in a part of the first structure layer 12. On the other hand, the second organic EL element LF2 is formed and supported and fixed so as to be embedded in a part of the second structure layer 13.

  3 is a cross-sectional view of the self-bending thin film 1 taken along the line aa in FIG. As shown in FIG. 3, each of the light bending films 11, the first structure layer 12, the second structure layer 13 and the solar cell 14 constituting the self-bending thin film 1 is shown in FIG. From the lower side, the second structural layer 13, the light bending film 11, the first structural layer 12, and the solar cell 14 are laminated in this order.

  The light bending film 11 is a film made of a polymer film that bends in different bending directions with respect to light of each wavelength when irradiated with light of different wavelengths. The light bending film 11 of the present embodiment is composed of an azobenzene compound. Further, when irradiated with light having a wavelength other than 366 nm, for example, 540 nm, the irradiated side is bent as a valley fold side. Further, the light bending film 11 has a characteristic of extending straight in a planar shape when irradiated with light having a wavelength of 366 nm. Further, the light bending film 11 has a characteristic of maintaining the state when the light irradiation is stopped.

  The first and second organic EL elements LF1, LF2 are arranged so as to sandwich the light bending film 11, respectively. That is, the first organic EL element LF1 and the second organic EL element LF2 have a laminated structure in which the light bending film 11 is sandwiched. Each light emitted from the first and second organic EL elements LF1, LF2 irradiates the light bending film 11, respectively.

  A first structure layer 12 is formed on the light bending film 11 on the side of the arrow Z in FIG. The first structure layer 12 is supported and fixed so as to sandwich the first organic EL element LF1 in the region C. A second structure layer 13 is formed on the light bending film 11 on the side opposite to the Z arrow in FIG. The second structure layer 13 is supported and fixed so as to sandwich the second organic EL element LF2 in the region C.

  Any material may be used for the first and second structural layers 12 and 13, but a flexible member is preferable in order to prevent the bending operation of the optical bending film 11 from being hindered. Note that the first and second structural layers 12 and 13 do not become main bending portions of the self-bending thin film 1, and therefore are as flexible as the first and second organic EL elements LF1 and LF2 and the solar cell 14. Not needed.

  Each of the first and second organic EL elements LF1 and LF2 has a light emitting layer made of an organic material. Thereby, the first and second organic EL elements LF1 and LF2 themselves can be thinned. The first organic EL element LF1 is an EL element that emits light having a first wavelength. The second organic EL element LF2 is an EL element that emits light having a second wavelength different from the first wavelength. The first organic EL element LF1 of the present embodiment emits light having a wavelength of 366 nm as the first wavelength, and the second organic EL element LF2 of the present embodiment has a wavelength of, for example, 540 nm as the second wavelength. EL element that emits the light.

The first and second organic EL elements LF1, LF2 are preferably flexible and bendable. This is to prevent the organic EL elements LF1 and LF2 from inhibiting the bending operation of the light bending film 11. For example, the organic EL elements LF1 and LF2 can be made very thin by making them extremely thin. Moreover, you may give flexibility by making each organic EL element LF1, LF2 into the aggregate | assembly of many small EL elements.

  A solar cell 14 is formed on the first organic EL element LF1 on the side opposite to the side on which the light bending film 11 is formed. In the present embodiment, the solar cell 14 is formed over the entire surface of the first structure layer 12.

  The solar cell 14 is a film-like solar cell, and may be a silicon solar cell or a compound solar cell such as gallium arsenide (GaAs). The solar cell 14 is connected to each of the first and second organic EL elements LF1, LF2 via an electric circuit (not shown). And the solar cell 14 converts the light energy of the light irradiated from the outside into an electrical energy, and supplies the electrical energy to each organic EL element LF1, LF2 via the said electrical circuit. The conductive member constituting the electric circuit is preferably covered with an insulating layer or the like.

  The solar cell 14 is preferably a flexible thin film, that is, a flexible thin film. In particular, it is preferable that the bent portion of the self-bending thin film 1 in the solar cell 14, that is, the vicinity of the portion in contact with the first and second organic EL elements LF1 and LF2, is flexible. This is to prevent the solar cell 14 from inhibiting the bending operation of the light bending film 11. For example, the solar cell 14 may be divided into a plurality of parts so that the divided parts have flexibility. Moreover, you may give flexibility by making the solar cell 14 into a very thin film | membrane.

Next, a detailed configuration example around the first and second organic EL elements LF1 and LF2 in the self-bending thin film 1 of the present embodiment will be described with reference to FIGS.
FIG. 4 is a diagram for specifying the peripheral region R1 of the first organic EL element LF1 and the peripheral region R2 of the second organic EL element LF2 in the self-bending thin film 1 shown in FIG. FIG. 5A is a diagram for explaining the configuration of the first organic EL element LF1 in the peripheral region R1, and FIG. 5B shows the configuration of the second organic EL element LF2 in the peripheral region R2. It is a figure for demonstrating a structure.

  As shown in FIG. 5A, the first organic EL element LF1 includes a transparent substrate 15A, an anode 16A, a hole injection layer 17A, a light emitting layer 18A, and a cathode 19A. (A) The transparent substrate 15A → the anode 16A → the hole injection layer 17A → the light emitting layer 18A → the cathode 19A are laminated in this order from the side of the optical bending film 11 along the Z arrow direction. A first polarizing plate 20A is disposed between the transparent substrate 15A of the first organic EL element LF1 and the light bending film 11.

  The transparent substrate 15A is provided in the upper layer of the first polarizing plate 20A. As a material for the transparent substrate 15A, a soda glass substrate made of an insulating material having light transmittance such as glass, quartz, or resin (plastic or plastic film) is used.

  The anode 16A is made of a light-transmitting conductive material such as indium tin oxide (ITO) or indium zinc oxide (IZO). The anode 16A serves to inject holes into the light emitting layer 18A via the hole injection layer 17A.

  The hole injection layer 17A is made of a conductive material having optical transparency such as a mixture of a polythiophene derivative such as polyethylenedioxythiophene and polystyrene sulfonic acid. The hole injection layer 17A has a function of receiving holes supplied from the anode 16A, injecting the holes into the light emitting layer 18A, and transporting the supplied holes inside the hole injection layer 17A. doing.

  The light emitting layer 18A is a layer that emits light of a specific first wavelength. The light emitting layer 18A of the present embodiment is made of a polysilane organic material and emits light having a first wavelength of 366 nm. The light emitting layer 18A is injected with holes supplied from the anode 16A via the hole injection layer 17A and free electrons (hereinafter simply referred to as “electrons”) supplied from the cathode 19A. Then, by recombining the injected holes and electrons, light having energy corresponding to the first wavelength (= 366 nm) is emitted.

The cathode 19A is made of a highly reflective metal film such as an aluminum (Al) film or silver (Ag). That is, the cathode 19A improves the light extraction efficiency by reflecting the light emitted from the light emitting layer 18A to the cathode 19A side and emitting it to the transparent substrate 15A side in addition to the function as an electrode for supplying electrons. It also has a function to make it. An anti-oxidation protective layer made of SiO, SiO ₂ , SiN or the like may be provided on the cathode 19A as necessary. Further, an electron injection / transport layer may be provided between the cathode 19A and the light emitting layer 18A. The electron injection / transport layer has a function of injecting electrons into the light emitting layer 18A and a function of transporting electrons inside the electron injection / transport layer. As this electron injection / transport layer, for example, lithium quinolinol, lithium fluoride, bathophenesium, or the like can be suitably used. A metal having a work function of 4 eV or less, such as Mg, Ca, Ba, Sr, Li, Na, Rb, Cs, Yb, Sm, or the like can also be used.

  Since the first organic EL element LF1 configured in this manner is preferably flexible, the transparent substrate 15A, the anode 16A, the hole injection layer 17A, the light emitting layer 18A, and the cathode 19A are each flexible. It is preferred that they are rich, and each is very thin.

  In the first polarizing plate 20A, the light having the first wavelength (366 nm) emitted from the light emitting layer 18A of the organic EL element LF1 includes light having a wavelength that hinders the bending control of the light bending film 11 and the like. Sometimes, the light having the wavelength to be blocked is blocked and only the light having the desired first wavelength (366 nm) is transmitted. Thereby, the allowable range of the wavelength of the light emitted from the first organic EL element LF1 can be widened, and the manufacture of the first organic EL element LF1 can be facilitated. Further, the first polarizing plate 20A is preferably rich in flexibility and is preferably extremely thin.

  The anode 16A in the first organic EL element LF1 is electrically connected to the high potential side terminal (plus terminal) of the solar cell 14 through the electric circuit (not shown). This electrical connection may be realized by providing a through hole or the like in the first structural layer 12. Further, a switch for switching the electrical connection between open and close may be provided. In FIG. 5A, the solar cell 14 is indicated by reference numeral 14A as its electrical equivalent member.

  Further, the cathode 19A in the first organic EL element LF1 is electrically connected through a capacitor film K formed on the low potential side terminal (minus terminal) of the solar cell 14. This capacitor film K constitutes a storage means for charging electric energy (charge) output from the solar cell 14. The capacitor film K may be included in the film forming the solar cell 14, the first organic EL element LF1, or the second organic EL element LF2. The capacitor film K may be disposed between the film forming the solar cell 14 and the first organic EL element LF1. The capacitor film K can supply the charged electric energy to the first organic EL element LF1 even when the self-bending thin film 1 is disposed in the dark part and the solar cell 14 no longer generates electric energy. it can. Note that the low potential side terminal (minus terminal) of the solar cell 14 may be directly connected to the cathode 19A without providing the capacitor film K.

In such a configuration, the first organic EL element LF1 is supplied with the electric energy supplied from the solar cell 14, and as a result, the first wavelength (366 nm) from the light emitting layer 18A.
Is emitted from the transparent substrate 15A side, passes through the first polarizing plate 20A, and reaches the light bending film 11.

  On the other hand, as shown in FIG. 5B, the second organic EL element LF2 includes a transparent substrate 15B, an anode 16B, a hole injection layer 17B, a light emitting layer 18B, and a cathode 19B. 5B, the transparent substrate 15B, the anode 16B, the hole injection layer 17B, the light emitting layer 18B, and the cathode 19B are stacked in this order from the side of the optical bending film 11 along the direction opposite to the arrow Z. Further, a second polarizing plate 20B is disposed between the transparent substrate 15B of the second organic EL element LF2 and the light bending film 11.

  The transparent substrate 15B, the anode 16B, the hole injection layer 17B, and the cathode 19B of the second organic EL element LF2 are the transparent substrate 15A, the anode 16A, the hole injection layer 17A, and the cathode 19B of the first organic EL element LF1, respectively. It has the same material and function as the cathode 19A. Therefore, detailed description of each transparent substrate 15B, anode 16B, hole injection layer 17B, and cathode 19B of the second organic EL element LF2 is omitted.

  In the present embodiment, the light emitting layer 18B of the second organic EL element LF2 is, for example, anthracene, pyrene, 8-hydroxyquinoline aluminum, bisstyrylanthracene derivative, tetraphenylbutadiene derivative, coumarin derivative, oxadiazole derivative, Styrylbenzene derivatives, pyrrolopyridine derivatives, perinone derivatives, cyclopentadiene derivatives, thiadiazolopyridine derivatives, or low molecular weight materials such as rubrene, quinacridone derivatives, phenoxazone derivatives, DCM, DCJ, perinone, perylene derivatives, coumarin derivatives, diazaindacene derivatives It is an organic material doped with the like. And the 2nd wavelength of the light radiate | emitted from this light emitting layer 18B is 540 nm, for example.

  The second polarizing plate 20B of the second organic EL element LF2 transmits only a specific second wavelength (for example, 540 nm) different from the light having the first wavelength (366 nm). That is, in the second polarizing plate 20B, the light having the second wavelength emitted from the light emitting layer 18B of the second organic EL element LF2 includes light having a wavelength that hinders the bending control of the light bending film 11 and the like. When blocking, the light having the wavelength to be blocked is blocked and only the light having the desired second wavelength is transmitted. Thereby, the allowable range of the wavelength of the light emitted from the second organic EL element LF2 can be widened, and the manufacture of the second organic EL element LF2 can be facilitated. Moreover, it is preferable that the 2nd polarizing plate 20B is rich in a softness | flexibility, and it is preferable that it is very thin.

  The anode 16B in the second organic EL element LF2 is electrically connected to the high potential side terminal (plus terminal) of the solar cell 14 through the electric circuit. That is, the electric circuit connected to the anode 16A of the first organic EL element LF1 and supplying a current as electric energy from the solar cell 14 is also connected to the anode 16B of the second organic EL element LF2. Have been routed to

  Further, the cathode 19B in the second organic EL element LF2 is electrically connected through the capacitor film K formed on the low potential side terminal (minus terminal) of the solar cell 14. The capacitor film K can supply the charged electric energy to the second organic EL element LF2 even when the self-bending thin film 1 is disposed in the dark part and the solar cell 14 no longer generates electric energy. it can. Alternatively, the low potential side terminal (minus terminal) of the solar cell 14 may be directly connected to the cathode 19B without providing the capacitor film K.

In such a configuration, the second organic EL element LF2 is supplied with the electric energy supplied from the solar cell 14, and as a result, the second organic EL element LF2 is different from the first wavelength (366 nm) from the light emitting layer 18B. Light having a wavelength is emitted from the transparent substrate 15B side, and reaches the light bending film 11 through the second polarizing plate 20B.

  Next, an operation example of the self-bending thin film 1 of the present embodiment will be described with reference to FIGS. 6 and 7 are schematic side views showing an operation example of the self-bending thin film 1 of the present invention. Here, the self-bending thin film 1 includes control means (not shown) for individually controlling current supply from the solar cell 14 or the capacitor film K to each of the first and second organic EL elements LF1 and LF2. And This control means is preferably capable of controlling on / off of current supply to the first and second organic EL elements LF1, LF2 and the amount of current. The control means ends the current supply to the first organic EL element LF1 after supplying the current to the first organic EL element LF1 for a predetermined period, and then supplies the current to the second organic EL element LF2. Supply current for a predetermined period.

  As shown in FIG. 6A, first, as an initial state, when the control means does not supply current to the first and second organic EL elements LF1, LF2 of the self-bending thin film 1, that is, each EL element LF1. , LF2 are not emitting light, the self-bending thin film 1 has a flat shape without bending.

  Next, when the self-bending thin film 1 is irradiated with light and the control means supplies a current only to the second organic EL element LF2, the second organic EL element LF2 receives the current and receives the second current. The light of the wavelength (540 nm) is emitted. Then, the light reaches the light bending film 11 via the second polarizing plate 20B, and the light bending film 11 turns the second organic EL element LF2 side into the valley folding side, that is, the first organic EL element LF1 side. Bend with the mountain fold side. As a result, as shown in FIG. 6B, the substantially central portion of the self-bending thin film 1 is bent into a V shape in FIG. 6B. After that, even if the current supply to the second organic EL element LF2 is stopped and the EL element LF2 is turned off, the state of the light bending film 11 does not change, so that the self-bending thin film 1 is in the state shown in FIG. Is maintained (see FIG. 6C).

  Next, when the control unit supplies a current only to the first organic EL element LF1, the first organic EL element LF1 receives the supply of the current and emits light having a first wavelength (366 nm). Then, the light reaches the light bending film 11 through the first polarizing plate 20A, and the light bending film 11 is bent into a V shape as shown in FIG. Bending gradually to return to the original planar shape as shown in FIG. Thereby, the whole self-bending thin film 1 becomes a planar shape as shown in FIG.

Further, when the current supply to the first organic EL element LF1 is continued, as shown in FIG. 7C, the optical bending film 11 has a planar shape in the initial state where the self-bending thin film 1 is not bent.
After that, even if the current supply to the first organic EL element LF1 is stopped and the first organic EL element LF1 is turned off, the state of the light bending film 11 does not change. ) Is maintained.

  Thus, the control unit can control the bending direction and the bending angle θ of the self-bending thin film 1 by controlling the amount of current supplied to each of the first and second organic EL elements LF1 and LF2. The bending angle θ can be related (for example, proportional) to the amount of current supplied to the first and second organic EL elements LF1 and LF2.

In addition, the self-bending thin film 1 of the present embodiment may include a shape detection unit that detects the bending state of the light bending film 11 or the self-bending thin film 1 itself. And a control means is good also as controlling the electric current supply amount with respect to each of 1st and 2nd organic EL element LF1, LF2 based on the detection result of a shape detection means. In this way, the bending state of the self-bending thin film 1 can be feedback-controlled, and the bending state of the self-bending thin film 1 can be controlled more precisely.

As described above, the present embodiment has the following effects.
(1) According to the present embodiment, the first organic EL element LF1 that emits light having a wavelength of 366 nm and the light having a wavelength of 540 nm are emitted from the light bending film 11 made of an azobenzene compound. The self-bending thin film 1 was arranged so as to be sandwiched between two organic EL elements LF2. Then, by alternately supplying electric energy to the first organic EL element LF1 and the second organic EL element LF2, light having a wavelength of 366 nm and light having a wavelength of 540 nm are alternately applied to the light bending film 11. To be irradiated. Therefore, when light having a wavelength of 366 nm is irradiated, the light having a wavelength of 366 nm is bent in a direction in which the side irradiated with the light has a valley fold side, and light having a wavelength of 540 nm is irradiated. The self-bending thin film 1 that extends straight in a plane can be realized.
(2) According to the present embodiment, the film-shaped solar cell 14 is provided in the upper layer of the first organic EL element LF1. And the solar cell 14 was electrically connected to each anode 16A, 16B and cathode 19A, 19B of 1st organic EL element LF1 and 2nd organic EL element LF2. The electric energy (current) generated by the solar cell 14 is supplied to each organic EL element LF1, LF2. Accordingly, since the first organic EL element LF1 and the second organic EL element LF2 are driven by the electric energy (current) generated in the solar cell 14, the self-bending thin film 1 is not supplied without supplying external power. Can be promoted.
(3) According to the present embodiment, the light source body that irradiates the light bending film 11 with light having a wavelength of 366 nm is the first organic EL in which the first light emitting layer 18A is composed of a polysilane organic material. It comprised with element LF1. In addition, the light source body that irradiates the light bending film 11 with light having a wavelength of 540 nm is composed of the second organic EL element LF2 in which the second light emitting layer 18B is composed of an organic material such as anthracene or pyrene. Therefore, each light source body can be formed thin.
(4) According to the present embodiment, the self-bending thin film 1 is provided with the capacitor film K as a power storage means for charging the electric energy (charge) output from the solar cell 14. Therefore, even when the self-bending thin film 1 is disposed in the dark part and the solar cell 14 no longer generates electric energy, the charged electric energy can be supplied to the first and second organic EL elements LF1 and LF2. it can.
(5) According to this embodiment, the light having the first wavelength (366 nm) emitted from the light emitting layer 18A of the first organic EL element LF1 is bent between the transparent substrate 15A and the light bending film 11. When light having a wavelength that inhibits the bending control of the film 11 is included, the first polarizing plate 20A that blocks only the light having the desired wavelength and blocks only the light having the desired first wavelength (366 nm). Formed. Therefore, the allowable range of the wavelength of the light emitted from the first organic EL element LF1 can be widened, and the manufacture of the first organic EL element LF1 can be facilitated.

Similarly, the light having the second wavelength (540 nm) emitted from the light emitting layer 18B of the second organic EL element LF2 between the transparent substrate 15B and the light bending film 11 is controlled to bend the light bending film 11. The second polarizing plate 20 </ b> B that blocks only the light having the desired second wavelength (540 nm) by blocking the light having the wavelength that inhibits the light having the wavelength that inhibits the light is formed. Therefore, the allowable range of the wavelength of the light emitted from the second organic EL element LF2 can be widened, and the manufacture of the second organic EL element LF2 can be facilitated.
(Second Embodiment)
Next, an example of a micromachine as an exercise device having the self-bending thin film 1 of the first embodiment as a component will be described with reference to FIGS. FIG. 8 is a perspective view showing a micromachine according to an embodiment of the present invention. The micromachine 30 of the present embodiment is a device that can propel a liquid phase such as a fluid having a low Reynolds number, that is, blood in a blood vessel in a living body.

As illustrated in FIG. 8, the micromachine 30 includes, for example, a storage unit 31 that stores a pharmaceutical agent and a drive unit 32 that controls driving of the micromachine 30. The micromachine 30 having such a configuration is formed by connecting a plurality of self-bending thin films 1 in the form of a belt-like form of the first embodiment in a row.

  FIG. 9 is a schematic enlarged cross-sectional view for explaining the configuration of the drive unit 32 of the micromachine 30. As shown in FIG. 9, the drive unit 32 is configured by connecting each of the eight self-bending thin films 1 to the adjacent self-bending thin films 1 in a row in the width direction. Each of the eight self-bending thin films 1 connected continuously in the width direction is continuously provided in the longitudinal direction (direction perpendicular to the width direction) of the self-bending thin film 1 having the strip shape. Connected side by side. At this time, the first organic EL element LF1 and the second organic EL element LF2 of the predetermined self-bending thin film 1, the first organic EL element LF1 and the second organic EL element LF2 of the adjacent self-bending thin film 1 and The arrangements of, for example, are alternated.

  Then, as each self-bending thin film 1 is bent, the drive unit 32 moves, for example, imitating flagelling movement or flagella movement such as bacteria. At this time, since the drive unit 32 is driven by the electric energy (current) generated in the solar cell 14, it is not necessary to supply electric power from the outside.

  As a result, for example, there is no need to provide a microactuator for driving the drive unit 32 in the storage unit 31 of the micromachine 30 as a separate body from the drive unit 32, so the micromachine 30 itself is very small and lightweight. can do. Further, when the control means for controlling the optical bending film 11 of each self-bending thin film 1 is arranged in a space S formed by connecting the self-bending thin films 1 side by side as shown in FIG. Wiring or the like for the control signal is not required, and the exercise device can be further reduced in size and weight.

  The technical scope of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention, and the specific materials and layers mentioned in the embodiment can be added. The configuration is merely an example, and can be changed as appropriate.

  In the present invention, for example, a motion mechanism that performs a complicated motion such as a linear motion, a rotational motion, or an insect wing can be configured only by the self-bending thin film 1 of the embodiment. Therefore, a rotary motor and a linear motor can be comprised only with the self-bending thin film 1 of the said embodiment. Further, the device for always directing the light receiving surface of the solar cell 14 toward the sun (light source) can be configured in a small and closed system using only the self-bending thin film 1 of the embodiment. For example, the direction of the solar cell 14 may be periodically changed, and the maximum output direction at that time may be set as the sun direction, and control may be performed so that the light receiving surface faces in that direction. In addition, for example, a motion mechanism that can move a robot arm, a ship rudder, an airplane elevator, and the like can be configured only by the self-bending thin film 1. The self-bending thin film 1 of the present invention is also suitable for a propulsion / position control mechanism of an unmanned airplane or an unmanned airship serving as a stratospheric platform used for communication. In addition, an artificial blood vessel, an artificial valve, an artificial muscle, etc. in an artificial organ can be constituted only by the self-flexing thin film of the present invention. Furthermore, the self-bending thin film of the present invention can be applied to a picture book that pops out, a moving toy, a shape-variable accessory, and the like.

1 is an overall perspective view of a self-bending thin film according to a first embodiment. It is an expansion perspective view which permeate | transmitted a part of self-flexing thin film which concerns on 1st Embodiment. It is sectional drawing of a self-bending thin film. It is a schematic cross section which specifies the EL element peripheral region in the self-flexible thin film same as the above. (A) is a figure for demonstrating the structure of a 1st organic EL element, (b) is a figure for demonstrating the structure of a 2nd organic EL element. (A), (b), (c) is a schematic side view which shows the operation example of the self-bending thin film same as the above, respectively. Similarly, (a), (b), and (c) are schematic side views showing an operation example of the self-bending thin film as described above. 1 is an overall perspective view of a micromachine as an exercise device according to an embodiment of the present invention. It is a model expanded sectional view for demonstrating the structure of the drive part of a micromachine.

Explanation of symbols

  LF1: a first organic EL element as a first light source body, LF2: a second organic EL element as a second light source body, 1 ... a self-bending thin film, 11 ... a light bending film, 14 ... a solar cell, 30 ... a micromachine as an exercise device.

Claims (8)

A film-shaped first light source that emits light of a first wavelength;
A film-shaped second light source that emits light of a second wavelength different from the first wavelength;
A self-bending thin film, comprising: a light bending film having a bending direction different from each of the light having the first wavelength and the light having the second wavelength. The self-bending thin film according to claim 1,
A self-bending thin film comprising a film-shaped solar cell in at least one of the first light source body and the second light source body. The self-bending thin film according to claim 1 or 2,
The self-bending thin film characterized in that at least one of the first wavelength and the second wavelength is 366 nm. The self-bending thin film according to any one of claims 1 to 3,
The self-bending thin film, wherein the light bending film is made of an azobenzene compound. The self-bending thin film according to any one of claims 1 to 4,
The self-bending thin film, wherein the first light source body and the second light source body are organic EL elements. The self-bending thin film according to any one of claims 1 to 5,
A self-bending thin film, wherein a polarizing plate is disposed between the light source body and the light bending film. The self-bending thin film according to any one of claims 1 to 6,
A self-bending thin film comprising a power storage means capable of supplying power to the light source body. An exercise apparatus comprising a plurality of self-flexing thin films according to claim 1 connected in series.

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