Patent Publication Number: US-2019178456-A1

Title: Self-generated lighting fixture

Description:
TECHNICAL FIELD 
     The present invention relates to a self-generated lighting fixture capable of absorbing light energy by a transparent solar cell, the light energy being radiated from a light source for illumination, and capable of self-generating photovoltaic power by a photovoltaic effect. 
     DESCRIPTION OF RELATED ART 
     Until now, photovoltaic power generation is a device that absorbs UV lights and light energy of daytime sunlight and self-generates photovoltaic power by the photovoltaic effect as its name suggests, and there has been no high interest in power generation of reusing light energy radiated from a light source for illumination instead of the daytime sunlight. 
     In recent years, as a light source for signboard illumination, a signboard illumination device using a LED (Light Emitting Diode) light source instead of a fluorescent lamp or a mercury lamp has been disclosed by the present inventor (see Patent Document 1). 
     Further, transparent solar cells utilizing daytime sunlight are also disclosed (see Patent Documents 2, 3, 4). 
     PRIOR ART DOCUMENT 
     Patent Document 
     [Patent Document 1] Japanese Patent No. 5189217 
     [Patent Document 2] Japanese Patent Application Laid-Open No. 2005-129987 
     [Patent Document 3] Japanese Patent Application Laid-Open No. 2009-229975 
     [Patent Document 4] Japanese Patent Application Laid-Open No. 2011-119455 
     SUMMARY OF THE INVENTION 
     Problem to be Solved the Invention 
     So far, much efforts are made to reduce power consumption of a light source for illumination, but it has been neglected to effectively reuse a self-radiated light energy by the light source for illumination. 
     Further, in the signboard illumination device described in Patent Document 1, although much efforts are made to reduce power consumption, there is no mentioning about the reuse of the light energy radiated from a LED light source. 
     In a mobile phone described in Patent Document 2, a problem is that there is a large variation in power generation amount due to weather, because the light energy of sunlight is used, although an entire housing is constituted of a transparent solar cell. 
     Further, in an electric bulletin board described in Patent Document 3, a problem is that power generation amount is extremely reduced in a case of rainy weather etc., because the light energy of sunlight is used as described above. 
     Further, in an organic EL device including a solar cell described in Patent Document 4, a problem is that there is a variation in power generation capacity due to the weather and stable power generation cannot be expected, because the light energy of daytime sunlight is absorbed to generate electricity. 
     An object of the present invention is to provide a self-generated lighting fixture capable of reusing a light energy radiated from a light source for illumination to self-generate electricity, and capable of realizing further power saving, in view of a long-term power failure due to an accident at nuclear power plants in Fukushima Prefecture, a surge of electricity price and a consciousness of power saving thereafter. 
     Means for Solving the Problem 
     (First Aspect) 
     According to a first aspect of the present invention, there is provided a self-generated lighting fixture, including: 
     a light source for illumination that emits light upon receiving supply of electric power; 
     a transparent solar cell that absorbs light energy to generate electricity; and 
     a power control unit that controls electric power supplied to the light source and includes commercial electric power as one of electric powers to be controlled, 
     wherein the light source has a first light source and a second light source provided independently of each other, 
     the transparent solar cell absorbs a summed light energy from both the first light source and the second light source to generate electricity, and 
     the power control unit supplies the commercial electric power to the first light source and supplies the electric power generated by the transparent solar cell to the second light source. 
     (Second Aspect) 
     According to a second aspect of the present invention, there is provided a self-generated lighting fixture, including: 
     a light source for illumination that emits light upon receiving supply of the electric power; 
     a mount-type substrate on which the light source is mounted; 
     a transparent solar cell that absorbs light energy to generate electricity; and 
     a power control unit that controls electric power supplied to the light source and includes commercial electric power as one of electric powers to be controlled, 
     wherein the light source includes a first light source mounted on one main surface of the mount-type substrate, a second light source mounted on the other main surface of the mount-type substrate so as to emit light toward the opposite side of the first light source, 
     the transparent solar cell absorbs light energy radiated from the first light source to generate electricity, and 
     the power control unit supplies the commercial electric power to the first light source and supplies the electric power generated by the transparent solar cell to the second light source. 
     (Third Aspect) 
     According to a third aspect of the present invention, there is provided a self-generated lighting fixture, including: 
     a light source for illumination that emits light upon receiving supply of electric power; 
     a transparent solar cell that absorbs light energy to generate electricity; 
     a power control unit that controls electric power supplied to the light source and includes commercial electric power as one of electric powers to be controlled; and 
     a power storage device including a storage battery that stores electricity upon receiving supply of the electric power from the power control unit, and supplies the electric power stored in the power storage battery, 
     wherein the transparent solar cell absorbs the light energy radiated from the light source to generate electricity, 
     the power control unit captures the commercial electric power and the electric power generated by the transparent solar cell, and supplies the captured electric power to the power storage device, and 
     the power storage device has a detecting function of detecting stop of supply of the electric power from the power control unit, and/or power failure, in addition to on/off function of a power switch, and when the stop of supply of the electric power from the power control unit and/or power failure is detected by the detecting function, the power storage device has an endless function of always turning on the light source by continuously supplying the electric power stored in the storage battery to the light source, and resuming supply of the electric power to the light source upon receiving supply of the electric power from the power control unit, the electric power being generated by the transparent solar cell by absorption of the light energy radiated from the light source during the on state. 
     (Fourth Aspect) 
     According to a fourth aspect of the present invention, there is provided a self-generated lighting fixture, including: 
     a light source for illumination that emits light upon receiving supply of electric power; 
     a panel having an illumination target surface irradiated with light energy from the light source; and 
     a transparent solar cell that absorbs the light energy to generate electricity, 
     wherein the light source is installed so as to be obliquely inclined with respect to the illumination target surface so that an illumination target surface of the panel is irradiated obliquely with the light energy, 
     an irradiation target surface of the panel is disposed outward, and 
     the transparent solar cell is formed in a planar shape on the irradiation target surface, and both the light energy radiated from the light source and the light energy of the sunlight are absorbed to generate electricity. 
     (Fifth Aspect) 
     According to a fifth aspect of the present invention, there is provided a self-generated lighting fixture, including: 
     a light source for illumination that emits light upon receiving supply of electric power; 
     a transparent solar cell that absorbs light energy to generate electricity; and 
     a power control unit that controls electric power supplied to the light source and includes commercial electric power as one of electric powers to be controlled, 
     wherein the transparent solar cell absorbs the light energy radiated from the light source to generate electricity, 
     the power control unit supplies summed power of the commercial electric power and the electric power generated by the transparent solar cell to the light source, and 
     the light source irradiates light energy by supplying the summed electric power. 
     Advantage of the Invention 
     According to the present invention, it is possible to provide a self-generated lighting fixture capable of reusing light energy radiated from a light source for illumination to self-generate electricity, and capable of realizing further power saving. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1A  is a schematic plan view showing a configuration of a surface mount-type LED package. 
         FIG. 1B  is a cross-sectional view taken along the line A-A of  FIG. 1A . 
         FIG. 1C  is a cross-sectional view showing another configuration of the surface mount-type LED package. 
         FIG. 2  is a schematic perspective view showing an arrangement of a transparent UV cut film, an organic thin film transparent solar cell and a purple LED module. 
         FIG. 3A  is a schematic perspective view of a purple LED module including a frame of a self-generated lighting fixture according to a first embodiment of the present invention. 
         FIG. 3B  is a sectional view taken along the line A-A of  FIG. 3A . 
         FIG. 3C  is a schematic view showing a configuration example of an electric circuit of a self-generated lighting fixture according to a first embodiment of the present invention. 
         FIG. 4A  is a perspective view including a frame of a self-generated lighting fixture according to a second embodiment of the present invention. 
         FIG. 4B  is a cross-sectional view taken along the line A-A of  FIG. 4A . 
         FIG. 4C  is a cross-sectional view taken along the line B-B of  FIG. 4B . 
         FIG. 4D  is a schematic view showing a configuration example of an electric circuit of a self-generated lighting fixture according to a second embodiment of the present invention. 
         FIG. 5A  is a perspective view including a frame of a self-generated lighting fixture according to a third embodiment of the present invention. 
         FIG. 5B  is a cross-sectional view taken along the line A-A of  FIG. 5A . 
         FIG. 5C  is a schematic view showing a configuration example of an electric circuit of a self-generated lighting fixture according to a third embodiment of the present invention. 
         FIG. 6A  is a perspective view including a frame of a self-generated lighting fixture according to a fourth embodiment of the present invention. 
         FIG. 6B  is a cross-sectional view taken along the line A-A of  FIG. 6A . 
         FIG. 6C  is a schematic view showing a configuration example of an electric circuit of a self-generated lighting fixture according to a fourth embodiment of the present invention. 
         FIG. 7A  is a perspective view including a frame of a self-generated lighting fixture according to a fifth embodiment of the present invention. 
         FIG. 7B  is a cross-sectional view taken along the line A-A of  FIG. 7A . 
         FIG. 7C  is a schematic view showing a configuration example of an electric circuit of a self-generated lighting fixture according to a fifth embodiment of the present invention. 
         FIG. 8A  is a perspective view including a frame of a self-generated lighting fixture according to a sixth embodiment of the present invention. 
         FIG. 8B  is a cross-sectional view taken along the line A-A of  FIG. 8A . 
         FIG. 8C  is a schematic view showing a configuration example of an electric circuit of a self-generated lighting fixture according to a sixth embodiment of the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that in the specification of the present application, all the matters described in the specification, the scope of claims and the drawings of the basic application No. 2016-171257 are stated without omission, and the matters disclosed in the basic application can be added to the specification, claims, and drawings of the present application as necessary. 
     (Configuration of LED Package) 
     First, a configuration of an LED package used in an embodiment of the present invention will be described with reference to  FIGS. 1A, 1B, and 1C .  FIG. 1A  is a schematic plan view showing a configuration of a surface mount-type LED package, and  FIG. 1B  is a cross-sectional view taken along the line A-A of  FIG. 1A . 
     In this embodiment, as shown in  FIG. 1A  and  FIG. 1B , a surface mount-type purple LED package  1  is used as an LED package. The purple LED package  1  includes: a cavity  12  molded from ceramic or resin; a purple LED element  10  mounted in the cavity  12 ; a reflector  14  formed on the inner surface of the cavity  12 ; a sealing material  15  filling the inside of the cavity  12 ; a condenser lens  16 ; LED substrate  17 ; an organic thin film transparent solar cell  100 ; and a transparent UV cut film  104 . The sealing material  15 , the condenser lens  16 , the organic thin film transparent solar cell  100 , and the transparent UV cut film  104  are stacked in this order on the purple LED element  10 . 
     The reflector  14  reflects purple light energy  74  radiated from the purple LED element  10  to the front surface (upward in  FIG. 1B ). 
     The sealing material  15  seals the purple LED element  10 , and includes a silicone resin containing R (red) G (green) B (blue) phosphors. For the sealing material  15 , it is preferable to use a silicone resin having ultraviolet resistance and heat resistance in which RGB phosphors for simultaneous additive color mixture are dispersed. 
     The purple LED element  10  is mounted on the LED substrate  17 . 
     The purple LED element  10  radiates purple light energy  74 . The purple LED package  1  emits and radiates simultaneous additive white light energy  68 , by combining the purple light energy  74  radiated from the purple LED element  10  and the RGB phosphors contained in the sealing material  15 . 
     The organic thin film transparent solar cell  100  absorbs white light energy  68  and purple light energy  74 , and generates a photovoltaic power by a photovoltaic effect. 
     The transparent UV cut film  104  is formed just outside the organic thin film transparent solar cell  100  as seen from the purple LED element  10 . The transparent UV cut film  104  absorbs and eliminates UV lights which are transmitted through the organic thin film transparent solar cell  100  and which cannot be completely absorbed by the organic thin film transparent solar cell  100 . Therefore, the light energy passing through the transparent UV cut film  104  becomes the white light energy  68  which does not contain UV lights. 
     Note that in this embodiment, the purple LED package  10  and the organic thin film transparent solar cell  100  are used to constitute the purple LED package  1 . However, the configuration is not limited thereto, and for example, a blue LED element and a dye sensitized transparent solar cell may be used, or an LED package may be constituted by a combination of other LED elements and a transparent solar cell. Further, in this embodiment, the term “transparent” means not completely transparent that transmits 100% of visible light, but shows transparency to the extent that visible light is transmitted to some extent, for example, 60% or more. 
     Further, in the purple LED package  1 , white light energy  68  for obtaining the whole visible light region with phosphor emission, is realized by radiating the purple light energy  74  radiated from the purple LED element  10  toward the RGB phosphors contained in the sealing material  15 , that is, by simultaneous additive color mixture utilizing three primary colors of light. Therefore, color reproducibility is much higher, and it is easy to approximate Ra (average color rendering index) to 100 by adjusting increase/decrease of each phosphor of RGB, compared to a method of emitting and radiating pseudo white light in a combination of a blue LED element and a yellow phosphor which have been mainstream so far. Further, light emission of light energy such as red, green, blue, yellow, etc. other than white light can be easily controlled by adjusting the increase/decrease of each phosphor of RGB. Further, the purple light energy  74  is radiated from the purple LED element  10  as the light energy  68  for emitting white light by simultaneous additive color mixture with RGB phosphors, or for emitting a color that can be obtained by the simultaneous additive color mixture. The purple light energy  74  is also radiated as UV lights (UV light energy  73 ). 
     In this embodiment, the purple LED element  10  is employed as the LED element. However, other LED elements, for example, a near UV light LED element, a blue LED element, or a near infrared LED element may also be employed. Further, in this embodiment, a face-up type is employed as a mounting structure of the purple LED element  10  mounted in the cavity  12  on the LED substrate  17 . However, face-down type may also be employed. 
     Further, as shown in  FIG. 1B  and  FIG. 1C , the number of the purple LED elements  10  used for the purple LED package  1  may be one or plural. The condenser lens  16  and the transparent UV cut film  104  are not indispensable as the purple LED package  1 , and may be provided as necessary. 
     (Configuration of Transparent Solar Cell) 
       FIG. 2  is a schematic perspective view showing the arrangement of the transparent UV cut film, the organic thin film transparent solar cell and the purple LED module. 
     As shown in  FIG. 2 , the organic thin film transparent solar cell  100  is constituted of a first transparent electrode layer  101 , a transparent photoelectric conversion layer  102 , and a second transparent electrode layer  103 , as seen from the purple LED module  20 , and are stacked in this order. The purple LED module  20  is formed by connecting a plurality of purple LED packages  1  used in this embodiment, and emits UV light (UV light energy  73 ) together with the white light energy  68  by simultaneous additive color mixture. The organic thin film transparent solar cell  100  generates high photovoltaic power by adjusting an amount of UV light by increase/decrease of each phosphor of RGB. The organic thin film transparent solar cell  100  absorbs the UV light energy  73  radiated from the purple LED module  20  to generate electricity by the photovoltaic effect. The photovoltaic power which is self-generated by the organic thin film transparent solar cell  100  is supplied to the purple LED module  20  via a DC controller not shown, or stored in a secondary lithium ion storage battery (not shown). 
     Note that a voltage of the photovoltaic power which is self-generated by the organic thin film transparent solar cell  100  is affected by an amount of incident light of the UV light energy  73 , and therefore it is impossible to use the voltage as it is. Therefore, a DC controller is provided, to control the voltage generated by the organic thin film transparent solar cell  100  so as to be compatible with a scheduled supply destination. The DC controller controls the generated voltage so that the supply destination of the voltage generated by the organic thin film transparent solar cell  100  is compatible with each supply destination, for example, the generated voltage is compatible with each supply destination of the purple LED element  10 , the lithium ion storage battery or the like. Namely, after the voltage generated by the organic thin film transparent solar cell  100  is controlled by the DC controller, the generated voltage is supplied to the purple LED module  20 , or stored in the secondary lithium-ion battery. 
     (Configuration of Transparent UV Cut Film) 
     As shown in  FIG. 2 , the transparent UV cut film  104  is formed just outside the organic thin film transparent solar cell  100  as seen from the purple LED module  20 . The transparent UV cut film  104  absorbs and eliminates UV lights after being absorbed but not fully absorbed by the organic thin film transparent solar cell  100  to generate photovoltaic power. Thereby, the transparent UV cut film  104  suppresses a bad influence of emitting UV lights toward a lamp cover  105  or a human body existing in front of the transparent UV cut film  104 , by transmitting the white light energy  68  as it is not containing UV lights. 
     Note that in this embodiment, the transparent UV cut film  104  is employed. However, any other material may be used as long as it is transparent and absorbs and eliminates UV lights. Further, if the organic thin film transparent solar cell  100  absorbs the UV lights to some extent and there is little influence of emitting UV lights toward the lamp cover  105  or the human body existing outside the organic thin film transparent solar cell  100 , it is not necessary to form the transparent UV cut film  104 . 
     First Embodiment 
     Hereinafter, a self-generated lighting fixture according to a first embodiment of the present invention will be described. 
       FIG. 3A  is a schematic perspective view of a purple LED module including a frame of a self-generated lighting fixture according to a first embodiment of the present invention. Further,  FIG. 3B  is a cross-sectional view taken along the line A-A of  FIG. 3A , and  FIG. 3C  is a schematic view showing a configuration example of an electric circuit of the self-generated lighting fixture according to the first embodiment of the present invention. 
     The purple LED module  20  is formed by connecting a plurality of surface mount-type purple LED packages  1 . 
     The term “connecting” means a state in which purple LED packages  1  are arranged to be continuous with each other and are electrically connected. In this case, each purple LED package  1  emits and radiates UV light energy  73  upon receiving supply of electric power converted from commercial electric power (AC) to DC by an AC/DC converter  110 . The organic thin film transparent solar cell  100  absorbs the UV light energy  73  emitted and radiated from each purple LED package  1  connected to a plurality of purple LED modules  20 , and self-generate photovoltaic power by the photovoltaic effect. 
     Note that in  FIG. 3B , the organic thin film transparent solar cell  100  is formed separately from the purple LED package  1 , but the organic thin film transparent solar cell  100  is functionally the same as the organic thin film transparent solar cell  100  shown in  FIG. 1B . Namely, the organic thin film transparent solar cell  100  may be anything as long as it absorbs the light energy radiated from the purple LED element  10  to generate electricity. Therefore, the organic thin film transparent solar cell  100  may be provided as a constituent element of the purple LED package  1 , or may be provided as a constituent element of the purple LED module  20 . 
     The transparent UV cut film  104  is formed just outside the organic thin film transparent solar cell  100  as seen from the surface mount-type purple LED package  1 . The transparent UV cut film  104  absorbs and eliminates UV lights transmitted through the organic thin film transparent solar cell  100 . The transparent UV cut film  104  absorbs and eliminates the remaining UV light after being absorbed by the organic thin film transparent solar cell  100  to generate photovoltaic power, and transmits the white light energy  68  as it is, not containing UV light. Thereby, the transparent UV cut film  104  suppresses a bad influence of emitting UV lights toward the lamp cover  105  or the human body existing in front of the transparent UV cut film  104 . 
     Note that in  FIG. 3B , the transparent UV cut film  104  is formed separately from the purple LED package  1 , but functionally, it is the same as the transparent UV cut film  104  shown in  FIG. 1B . Namely, the transparent UV cut film  104  may be anything as long as it can absorb and eliminate UV lights radiated from the purple LED element  10 . Therefore, the transparent UV cut film  104  may be provided as a constituent element of the purple LED package  1 , or may be provided as a constituent element of the purple LED module  20 . 
     The lamp cover  105  is disposed on the opposite side (the side from which light is emitted) of the LED substrate  17 , as seen from the purple LED package  1 . The lamp cover  105  is formed so as to surround and cover the purple LED module  20  in a square shape. The transparent UV cut film  104  is formed on an inner surface of the lamp cover  105 , and the organic thin film transparent solar cell  100  is formed on an inner surface of the transparent UV cut film  104 . Therefore, the organic thin film transparent solar cell  100 , the transparent UV cut film  104 , and the lamp cover  105  are stacked in this order, as seen from the purple LED package  1 . 
     The organic thin film transparent solar cell  100  absorbs the UV light energy  73  radiated from the purple LED module  20  to generate electricity by the photovoltaic effect. The photovoltaic power generated by the organic thin film transparent solar cell  100  is supplied to the purple LED module  20  via a DC controller  111 . 
     (Electric Circuit) 
     The power control unit  112  controls the electric power to be supplied to the purple LED module  20  (purple LED package  1 ) which is the light source, and includes commercial electric power as one of the electric powers to be controlled, and has an AC/DC converter  110  and a DC controller  111 . The AC/DC converter  110  converts the commercial electric power (AC) to DC power upon receiving supply of the commercial electric power (AC). The DC power converted by the AC/DC converter  110  is supplied to the purple LED module  20 . The DC power supplied to the purple LED module  20  is consumed to cause each purple LED package  1  to emit light (light up the purple LED module  20 ). The DC controller  111  controls so that the photovoltaic power generated by the organic thin film transparent solar cell  100  is compatible with the purple LED module  20 . The electric power controlled by the DC controller  111  is supplied to the purple LED module  20 . The electric power supplied from the DC controller  111  to the purple LED module  20  is consumed to cause each purple LED package  1  to emit light (light up the purple LED module  20 ) in the same manner as described above. 
     In the first embodiment of the present invention, each purple LED package  1  radiates UV light energy  73  by supplying the commercial electric power to the purple LED module  20  via the AC/DC converter  110 . Then, the organic thin film transparent solar cell  100  absorbs the UV light energy radiated from each purple LED package  1 , and generates the photovoltaic power by the photovoltaic effect. The photovoltaic power generated by the organic thin film transparent solar cell  100  is supplied to the purple LED module  20  via the DC controller  111 . Thereby, the summed electric power of the commercial electric power and the electric power generated by the organic thin film transparent solar cell  100  is supplied to the purple LED module  20 , and upon receiving the summed electric power, the purple LED module  20  radiates UV light energy  73 . Therefore, the purple LED module  20  can exhibit capability to emit and radiate light energy that far exceeds an emission radiation power of the commercial electric power. Namely, in each purple LED package  1  of the purple LED module  20 , the commercial electric power consumed for radiating UV light energy  73  may be a minimum necessary electric power, and it is possible to light up the purple LED module  20  with a power exceeding the emission radiation power of the commercial electric power only, due to summed power of the photovoltaic power generated by the organic thin film transparent solar cell  100  by absorption of the UV light energy  73  radiated by supplying minimum necessary electric power, and the commercial electric power. 
     Note that in the first embodiment, the purple LED package is used as the LED package, but the LED package is not limited thereto, and a near-UV light LED package, a blue LED package, a near-infrared LED package, or the like may also be used. Further, in the first embodiment, the organic thin film transparent solar cell is used as the transparent solar cell, but the transparent solar cell is not limited thereto, and transparent solar cells such as organic transparent solar cells including dye sensitized transparent solar cells, transparent innovative solar cells, transparent compound-based solar cells, transparent thin-film solar cells, etc., can be widely used. 
     Second Embodiment 
     Next, a self-generated lighting fixture according to a second embodiment of the present invention will be described. 
       FIG. 4A  is a perspective view including a frame of the self-generated lighting fixture according to a second embodiment of the present invention. Further,  FIG. 4B  is a cross-sectional view taken along the line A-A of  FIG. 4A ,  FIG. 4C  is a cross-sectional view taken along the line B-B of  FIG. 4B , and  FIG. 4D  is a schematic view showing a configuration example of an electric circuit of the self-generated lighting fixture according to the second embodiment of the present invention. Note that in the second embodiment, elements that are different from those of the first embodiment will be mainly described, elements that are substantially the same as the elements described in the first embodiment will be given the same reference numerals, and description thereof will be omitted as much as possible. 
     The self-generated lighting fixture according to the second embodiment of the present invention includes an LED module unit  41  constituting an LED lighting fixture. The LED module unit  41  includes two LED modules (light sources) provided independently of each other, namely, the purple LED module  20  and the purple LED module  21 . The purple LED module  20  is formed by connecting a plurality of surface mount-type purple LED packages  1   a . Each purple LED package  1   a  emits and radiates the UV light energy  73  upon receiving supply of the commercial electric power. The purple LED module  21  is formed by connecting a plurality of surface mount-type purple LED packages  1   b . Each purple LED package  1   b  emits and radiates the UV light energy  73  not upon receiving supply of the commercial electric power, but upon receiving the photovoltaic power from the organic thin film transparent solar cell  100 . 
     The purple LED package  1   a  of the purple LED module  20  and the purple LED package  1   b  of the purple LED module  21 , are mounted on a common LED substrate  17  but are not connected to each other. The purple LED module  21  (purple LED package  1   b ) self-radiates the UV light energy  73  independently of the purple LED module  20 , upon receiving supply of the electric power from the power control unit  112 , the electric power being generated by the organic thin film transparent solar cell  100 , and supplies the radiated UV light energy  73  to the organic thin film transparent solar cell  100 . Further, the purple LED module  21  radiates the UV light energy  73  by the electric power generated by the organic thin film transparent solar cell  100 , without requiring the commercial electric power. The purple LED package  1   a  and the purple LED package  1   b  are arranged in two rows in a zigzag manner on the LED substrate  17 , but this arrangement can be changed as necessary. 
     The organic thin film transparent solar cell  100  absorbs the UV light energy  73  radiated from each purple LED package  1   a  of the purple LED module  20  and the UV light energy  73  radiated from each purple LED package  1   b  of the purple LED module  21  respectively, and self-generates the photovoltaic power by the photovoltaic effect. 
     The transparent UV cut film  104  is formed just outside the organic thin film transparent solar cell  100  as seen from the purple LED packages  1   a  and  1   b . The transparent UV cut film  104  absorbs and eliminates the UV lights that have not been absorbed by the organic thin film transparent solar cell  100  but have passed through it. The transparent UV cut film  104  absorbs and eliminates the remaining UV light after being absorbed by the organic thin film transparent solar cell  100  to generate photovoltaic power, and transmits the white light energy  68  as it is not containing the UV light. Thereby, the transparent UV cut film  104  suppresses the bad influence of emitting the UV lights toward the lamp cover  105  or the human body existing in front of the transparent UV cut film  104 . 
     The lamp cover  105  is formed so as to surround and cover the purple LED module  20  and the purple LED module  21 . The lamp cover  105  is made of glass or resin. The transparent UV cut film  104  is formed on the inner surface of the lamp cover  105 , and the organic thin film transparent solar cell  100  is formed on the inner surface of the transparent UV cut film  104 . Therefore, the organic thin film transparent solar cell  100 , the transparent UV cut film  104 , and the lamp cover  105  are stacked in this order, as seen from purple LED packages  1   a  and  1   b.    
     (Electric Circuit) 
     The power control unit  112  controls the electric power to be supplied to the purple LED module  20  (purple LED package  1   a ) and the purple LED module  21  (purple LED package  1   b ) which are light sources, and includes commercial electric power as one of the electric powers to be controlled, and has the AC/DC converter  110  and the DC controller  111 . The AC/DC converter  110  converts the commercial electric power (AC) to DC power, upon receiving the commercial electric power (AC). The DC power converted by the AC/DC converter  110  is supplied to the purple LED module  20 . The DC power supplied to the purple LED module  20  is consumed to cause each purple LED package  1   a  to emit light (light up the purple LED module  20 ). The DC controller  111  controls so that the photovoltaic power generated by the organic thin film transparent solar cell  100  is compatible with the purple LED module  21 . The electric power controlled by the DC controller  111  is supplied to the purple LED module  21 . The electric power supplied from the DC controller  111  to the purple LED module  21  is consumed to cause each purple LED package  1   b  to emit light (light up the purple LED module  21 ). 
     In the second embodiment of the present invention, each purple LED package  1   a  radiates UV light energy  73  by supplying the commercial electric power to the purple LED module  20  via the AC/DC converter  110 . Then, the organic thin film transparent solar cell  100  absorbs the UV light energy  73  radiated from each purple LED package  1   a , and generates the photovoltaic power by the photovoltaic effect. The photovoltaic power generated by the organic thin film transparent solar cell  100  is supplied to the purple LED module  21  via the DC controller  111 . Thereby, each purple LED package  1   b  radiates UV light energy  73 , and the organic thin film transparent solar cell  100  absorbs the UV light energy  73  and generates the photovoltaic power. Then, the organic thin film transparent solar cell  100  absorbs the UV light energy  73  radiated from each purple LED package  1   b , and generates the photovoltaic power by the photovoltaic effect. Then, this photovoltaic power is again supplied to the purple LED module  21  via the DC controller  111 . As a result, the organic thin film transparent solar cell  100  absorbs a summed light energy (UV light energy  73 ) from both the purple LED package  1   a  of each purple LED module  20  and the purple LED package  1   b  of each purple LED module  21 , to generate electricity. Thereby, the LED module unit  41  can exhibit a power to radiate light energy that far exceeds the emission radiation power of the commercial electric power. Namely, in each purple LED package  1  of the purple LED module  20 , the commercial electric power consumed for radiating UV light energy  73  may be a minimum necessary electric power, and it is possible to light up the purple LED module  41  with a power exceeding the emission radiation power of the commercial electric power only, due to summed power of the photovoltaic power generated by the organic thin film transparent solar cell  100  by absorption of the UV light energy  73  radiated by supplying minimum necessary electric power, and the commercial electric power, thereby further increasing the power generation capability. 
     Note that in the second embodiment, the purple LED package is used as the LED package, but the LED package is not limited thereto, and the near-UV light LED package, the blue LED package, the near-infrared LED package, or the like may also be used. Further, in the second embodiment, the organic thin film transparent solar cell is used as the transparent solar cell, but the transparent solar cell is not limited thereto, and transparent solar cells such as organic transparent solar cells including dye sensitized transparent solar cells, transparent innovative solar cells, transparent compound-based solar cells, transparent thin-film solar cells, etc., can be widely used. 
     Third Embodiment 
     Next, a self-generated lighting fixture according to a third embodiment of the present invention will be described. 
       FIG. 5A  is a perspective view including a frame of a self-generated lighting fixture according to a third embodiment of the present invention,  FIG. 5B  is a cross-sectional view taken along the line A-A of  FIG. 5A , and  FIG. 5C  is a schematic view showing a configuration example of an electric circuit of the self-generated lighting fixture according to the third embodiment of the present invention. Note that in this third embodiment, elements that are different from those of the first embodiment will be mainly described, elements that are substantially the same as the elements described in the first embodiment will be given the same reference numerals, and description thereof will be omitted as much as possible. 
     The self-generated lighting fixture according to a third embodiment of the present invention includes a long LED lamp  70 . The LED lamp  70  includes: an LED substrate  17  serving as a mounting board; a purple LED module  20  in which a plurality of surface mount-type purple LED packages  1  are connected in a longitudinal direction; a UV light LED module  23  in which a plurality of UV light LED packages  3  are connected in a longitudinal direction; a titanium oxide apatite layer  25  exhibiting photocatalytic function; a back side lamp cover  26 ; the organic thin film transparent solar cell  100 ; the transparent UV cut film  104 ; and the lamp cover  105 . 
     Each purple LED package  1  of the purple LED module  20  emits and radiates the UV light energy  73  upon receiving supply of the commercial electric power, and supplies the UV light energy  73  to the organic thin film transparent solar cell  100 . 
     Each UV light LED package  3  of the ultraviolet LED module  23  is mounted on the LED substrate  17  common to the purple LED package  1  of the purple LED module  20 , but its mounting surface is opposite to the purple LED package  1  upside down. Namely, the purple LED package  1  is mounted on one main surface of the LED substrate  17 , and the UV light LED package  3  is mounted on the other main surface of the LED substrate  17 . Therefore, the UV light LED package  3  emits light to the side opposite to the purple LED package  1 . Further, the UV light LED package  3  is not connected to the purple LED package  1 . Each purple LED package  3  radiates the UV light energy  73  not upon receiving supply of the commercial electric power but upon receiving the photovoltaic power from the organic thin film transparent solar cell  100 . 
     The organic thin film transparent solar cell  100  absorbs the UV light energy  73  emitted and radiated from each purple LED package  1  of the purple LED module  20 , and self-generates the photovoltaic power by the photovoltaic effect. The photovoltaic power generated by the organic thin film transparent solar cell  100  is supplied to the ultraviolet LED module  23 , and consumed to cause each UV light LED package  3  to emit light. 
     The transparent UV cut film  104  is formed just outside the organic thin film transparent solar cell  100  as seen from the purple LED element  1 . The transparent UV cut film  104  absorbs the UV lights which are transmitted through the organic thin film transparent solar cell  100  and which cannot be completely absorbed by the organic thin film transparent solar cell  100 . The transparent UV cut film  104  absorbs and eliminates the remaining UV light after being absorbed by the organic thin film transparent solar cell  100  to generate the photovoltaic power, and transmits the white light energy  68  as it is not containing the UV light. Thereby, the transparent UV cut film  104  suppresses the bad influence of emitting the UV lights toward the lamp cover  105  or the human body existing in front of the transparent UV cut film  104 . 
     The ultraviolet LED module  23  is installed on the opposite side (back side) of the side (front side) on which the purple LED module  20  is installed with the LED substrate  17  interposed therebetween. Therefore, the ultraviolet LED module  23  emits and radiates the UV light energy  71  in a direction opposite to a direction in which the purple LED module  20  emits and radiates the UV light energy  71 . Thereby, it is possible to suppress the bad influence of radiating the UV light energy  71  toward human beings, animals and plants existing on the side where the purple LED module  20  emits and radiates the UV light energy  71 . 
     The lamp cover  105  is formed so as to surround and cover the purple LED module  20  (purple LED module  1 ). The lamp cover  105  is made of glass or resin. The transparent UV cut film  104  is formed on the inner surface of the lamp cover  105 , and the organic thin film transparent solar cell  100  is formed on the inner surface of the transparent UV cut film  104 . Therefore, the organic thin film transparent solar cell  100 , the transparent UV cut film  104 , and the lamp cover  105  are stacked in this order, as seen from the purple LED package  1 . 
     The back side lamp cover  26  is a resin or glass lamp so as to surround and cover the ultraviolet LED module  23  (UV light LED package  3 ). The titanium oxide apatite layer  25  is formed on the outer surface of the back side lamp cover  26 . The titanium oxide apatite layer  25  is formed by coating or sticking titanium oxide apatite to the outer surface of the back side lamp cover  26 , the titanium oxide apatite being formed by ion exchange of titanium oxide in an apatite crystal structure. The titanium oxide apatite layer  25  exhibits a photocatalytic function such as deodorant effect, antibacterial effect, and bactericidal effect, by being excited upon receiving the UV light energy  71  which is emitted and radiated from each UV light LED package  3  of the ultraviolet LED module  23 . 
     Note that in this third embodiment, the long LED lamp  70  is employed, but the LED lamp is not limited thereto, and surcline type, down light type, or projector type may also be employed. 
     (Electric Circuit) 
     The power control unit  112  controls the electric power to be supplied to the purple LED module  20  (purple LED package  1   a ) and the purple LED module  23  (purple LED package  3 ) which are light sources, and includes the commercial electric power as one of the electric powers to be controlled, and includes the AC/DC converter  110  and the DC controller  111 . The AC/DC converter  110  converts the commercial electric power (AC) to DC power upon receiving supply of the commercial electric power (AC). The DC power converted by the AC/DC converter  110  is supplied to the purple LED module  20 . The DC power supplied to the purple LED module  20  is consumed to cause each purple LED package  1  to emit light (light up the purple LED module  20 ). The DC controller  111  controls so that the photovoltaic power generated by the organic thin film transparent solar cell  100  is compatible with the purple LED module  23 . The electric power controlled by the DC controller  111  is supplied to the purple LED module  23 . The electric power supplied from the DC controller  111  to the purple LED module  23  is consumed to cause each purple LED package  3  to emit light (light up the purple LED module  23 ). 
     In the third embodiment of the present invention, each purple LED package  1  radiates the UV light energy  73  by supplying the commercial electric power to the purple LED module  20  via the AC/DC converter  110 . Then, the organic thin film transparent solar cell  100  absorbs the UV light energy  73  radiated from each purple LED package  1 , and generates the photovoltaic power by the photovoltaic effect. The photovoltaic power generated by the organic thin film transparent solar cell  100  is supplied to the UV light LED module  23  via the DC controller  111 . Thereby, each UV light LED package  3  radiates the UV light energy  71 . As a result, it becomes possible to emit and radiate the light energy to the front surface side and the back surface side of the LED lamp  70  respectively, utilizing the photovoltaic power generated by the organic thin film transparent solar cell  100 . Further, it is possible to exhibit photocatalytic functions such as deodorant effect, antibacterial effect, and bactericidal effect, by exciting the titanium oxide apatite layer  25  with the UV light emitted and radiated from each UV light LED package  3  of the UV light LED module  23 . 
     Note that in the third embodiment, the purple LED package and the UV light LED package are used as the LED package, but the LED package is not limited thereto, and the near-UV light LED package, the blue LED package, the near-infrared LED package, or the like may also be used, instead of the purple LED package or instead of the UV light LED package. Further, in the third embodiment, LED packages with different emission wavelengths are mounted on the front and back surfaces of the LED substrate  17 , but the mount of the LED packages is not limited thereto, and LED packages having the same emission wavelengths may be mounted on the front and back surfaces of the LED substrate  17 . Further, in the third embodiment, the organic thin film transparent solar cell is used as the transparent solar cell, but the transparent sola cell is not limited thereto, and transparent solar cells such as organic transparent solar cells including dye sensitized transparent solar cells, transparent innovative solar cells, transparent compound-based solar cells, transparent thin-film solar cells, etc., can be widely used. 
     Fourth Embodiment 
     Next, a self-generated lighting fixture according to a fourth embodiment of the present invention will be described.  FIG. 6A  is a perspective view including the frame of the self-generated lighting fixture according to the fourth embodiment of the present invention,  FIG. 6B  is a cross-sectional view taken along the line A-A of  FIG. 6A , and  FIG. 6C  is a schematic view showing a configuration example of an electric circuit of the self-generated lighting fixture according to the fourth embodiment of the present invention. Note that in the fourth embodiment, elements that are different from those of the first embodiment will be mainly described, elements that are substantially the same as the elements described in the first embodiment will be given the same reference numerals, and description thereof will be omitted as much as possible. 
     The self-generated lighting fixture according to the fourth embodiment of the present invention includes: a long blue LED module  19 , a dye sensitized transparent solar cell  95 , the lamp cover  105 , and an external transparent solar cell  96 . 
     The blue LED module  19  is formed by connecting a plurality of surface mount-type blue LED packages  2 . Each blue LED package  2  is mounted on the LED substrate  17  at a predetermined interval, and radiates the white light energy  68  upon receiving the electric power from the power storage device  121  (lithium ion storage battery  120 ). The blue LED package  2  has a blue LED element  11 . The blue LED element  11  is sealed by a resin-based sealing material  18  containing a yellow phosphor. 
     The dye sensitized transparent solar cell  95  absorbs the white light energy  68  radiated from each blue LED package  2  of the blue LED module  19 , and self-generates the photovoltaic power by the photovoltaic effect. 
     The external transparent solar cell  96  absorbs the light energy of street lights (including security lights) and sunlight, and self-generates the photovoltaic power by the photovoltaic effect. The external transparent solar cell  96  is formed in a planar shape on the back surface (outer surface) of the LED substrate  17  which is a back surface side radiating portion of the blue LED module  19 . The external transparent solar cell  96  can be constituted of the organic thin film transparent solar cell, the dye sensitized transparent solar cell, or other transparent solar cell. 
     The lamp cover  105  is formed so as to surround and cover the blue LED module  19  in a square shape. The lamp cover  105  is made of glass or resin. The dye sensitized transparent solar cell  95  is formed in a planar shape on the inner surface of the lamp cover  105  so as to face each blue LED package  2 . By disposing the dye sensitized transparent solar cell  95  immediately in the vicinity of the blue LED package  2 , the dye sensitized transparent solar cell  95  absorbs the white light energy  68  radiated from the blue LED package  2  with little attenuation, and can generate the electric power with high photovoltaic power. 
     (Electric Circuit) 
     The power control unit  112  controls the electric power to be supplied to the blue LED module  19  (blue LED package  2 ) which is a light source, and includes the commercial electric power as one of the electric powers to be controlled, and has the AC/DC converter  110  and the DC controller  111 . The power control unit  112  captures the commercial electric power and the electric power generated by the transparent solar cells ( 95 ,  96 ), and supplies the captured electric power to the power storage device  121 . The AC/DC converter  110  converts the commercial electric power (AC) to DC power upon receiving supply of the commercial electric power (AC). The DC power converted by the AC/DC converter  110  is stored in the lithium ion storage battery  120  of the power storage device  121 . The DC controller  111  controls so that the photovoltaic power generated by the dye sensitized transparent solar cell  95  and the external transparent solar cell  96  is compatible with the blue LED module  19 . The electric power controlled by the DC controller  111  is stored in the lithium ion storage battery  120  of the power storage device  121 . 
     The power storage device  121  includes a lithium ion storage battery  120  stores electricity upon receiving supply of the electric power from the power control unit  112 , and supplies the electric power stored in the lithium ion storage battery  120  to the blue LED package  2  of the blue LED module  19 . The lithium ion storage battery  120  stores electricity supplied from the AC/DC converter  110  and the DC controller  111  of the power control unit  112 . The electric power stored in the lithium ion storage battery  120  is supplied to the blue LED module  19 . The electric power supplied to the blue LED module  19  is consumed to cause each blue LED package  2  to emit light (light up the blue LED module  19 ). 
     Further, the power storage device  121  has a detecting function of detecting stop of supply of the electric power from the power control unit, and/or power failure, in addition to on (energizing)/off (cutoff) function of a power switch. When the stop of supply of the electric power from the power control unit  112  and/or the power failure is detected by the detecting function, the power storage device  121  has an endless function of always turning on the blue LED package  2  by continuously supplying the electric power stored in the lithium ion storage battery  120  to blue LED package  2  of the blue LED module  19  and resuming supply of the electric power to the blue LED package  2  of the blue LED module  19  upon receiving supply of the electric power generated by the dye sensitized transparent solar cell  95  by absorption of the white light energy  68  radiated from the blue LED package  2  during on-state. Note that the power switch is a switch for turning on the self-generated lighting fixture in the on-state and turning off the self-generated lighting fixture in the off state. Further, “always on-state” means to keep the light source for illumination on, before and after detecting with the detecting function. 
     Further, when a charged amount of the lithium ion battery  120  reaches a fully charged state upon receiving supply of the electric power from the power control unit  112 , the power storage device  121 , by itself, has an overcharge prevention function of stopping supply of the electric power from the power control unit  112 . Further, when supply of the electric power from the power control unit  112  is stopped by the overcharge prevention function and thereafter the electric power is consumed from the fully charged state to become storable, the power storage device  121  has a function of storing electricity upon receiving supply of the electric power from the power control unit  112 , the electric power being generated by the dye sensitized transparent solar cell  95  and the external transparent solar cell  96 , and when the storage amount of the lithium ion storage battery  120  is decreased to a preset remaining charged amount during this storage, the power storage device  121  has a function of resuming supply of the commercial electric power to the blue LED package  2  of the blue LED module  19  upon receiving supply of the commercial electric power from the power control unit  112 . For example, the remaining charged amount may be set within a range of 30% or more and 50% or less when the fully charged amount in the fully charged state is taken as 100%. Note that the reason why a range of 30% or more and 50% or less is set for the setting of the remaining charged amount is because, there is a possibility that a proper value of the remaining power storage amount may be changed depending on an installing location and an infrastructure environment of the self-generated lighting fixture. Specifically, the time required for recovery after power failure tends to be relatively short in urban areas and relatively long in mountainous areas, and in this case, it is better to set the remaining charged amount to about 30% in the urban areas, and it is better to set the remaining charged amount to about 50% in the mountainous areas. Therefore, it is desirable to appropriately set the remaining charged amount according to a location where the blue LED module  19  is used. 
     In the fourth embodiment of the present invention, each blue LED package  2  radiates white light energy  68 , by supplying the commercial electric power stored in the lithium ion storage battery  120 , to the blue LED module  19  by the power storage device  121  via the AC/DC converter  110 . Then, the dye sensitized transparent solar cell  95  absorbs the white light energy  68  radiated from each blue LED package  2 , and generates the photovoltaic power by the photovoltaic effect. Meanwhile, the external transparent solar cell  96  absorbs the light energy of street lights or sunlight, and generates the photovoltaic power by the photovoltaic effect. The photovoltaic power generated by the dye sensitized transparent solar cell  95  and the external transparent solar cell  96  in this manner is captured into the power storage device  121  via the DC controller  111 , stored in the lithium ion storage battery  120 , and thereafter supplied again to the blue LED module  19  by the power storage device  121 . As a result, it is possible to emit and radiate the white light energy  68  from the blue LED package  2  of the blue LED module  19 , utilizing the photovoltaic power generated by the dye sensitized transparent solar cell  95  and the external transparent solar cell  96 . 
     Further, when the stop of supply of the electric power from the power control unit  112  or the power failure is detected due to some abnormality while the power supply switch is turned on, the power storage device  121  continuously supplies the electric power stored in the lithium ion storage battery  120 , to the blue LED package  2  of the blue LED module  19 . Thereby, it is possible to maintain the blue LED package  2  in the on-state (lighting state of the blue LED module  19 ). Further, the power storage device  121  stores electricity in the lithium ion storage battery  120  upon receiving the photovoltaic power from the power control unit  112 , the photovoltaic power being generated by the dye sensitized transparent solar cell  95  using the white light energy  68  radiated from the on-state blue LED package  2  and the photovoltaic power being generated by the external transparent solar cell  96  using the light energy of the street lights or the sunlight, and resumes supply of the electric power to the blue LED package  2  therefrom. Thereby, it is possible to maintain the blue LED package  2  in the on-state while minimizing the consumption of commercial electric power. 
     Further, when supply of the electric power from the power control unit  112  is stopped by the overcharge prevention function and thereafter the electric power is consumed from the fully charged state to become storable, the power storage device  121  stores electricity in the lithium ion storage battery  120  upon receiving supply of the electric power from the power control unit  112 , the electric power being generated by the dye sensitized transparent solar cell  95  and the external transparent solar cell  96 , and when the storage amount of the lithium ion storage battery  120  is decreased to a preset remaining charged amount during the storage, the power storage device  121  resumes supply of the commercial electric power to the blue LED package  2  of the blue LED module  19  upon receiving supply of the commercial electric power from the power control unit  112 . Thereby, it is possible to maintain the blue LED package  2  in the on-state, while supplementing a shortage of the charged amount by supply of the commercial electric power, the shortage being caused by supply of the electric power generated by the dye sensitized transparent solar cell  95  and the external transparent solar cell  96 . 
     Even if the power failure occurs while being in the lighting state of the blue LED module  19  (blue LED package  2 ), the blue LED package  2  emits the white light energy  68  upon receiving supply of the electric power continuously from the lithium ion storage battery  120 , and the dye sensitized transparent solar cell  95  repeats self-power generation by absorption of the white light energy  68 , and stores electricity in the lithium ion storage battery  120 . Thereby, it is possible to achieve a longer life of the discharge capacity time of the lithium ion storage battery  120 . Further, the blue LED package  2  continues to emit the white light energy  68  until the charged amount in the lithium ion storage battery  120  becomes zero as long as the power switch is not turned off (cut off). Therefore, it is possible to realize the self-generated lighting fixture having both a function as a lighting fixture responding to long-term emergency power failure and a power saving function during stop of the supply of the commercial electric power. 
     Note that in the fourth embodiment, the blue LED package is used as the LED package, but the LED package is not limited thereto, and the purple LED package, the near-UV light LED package, the near infrared LED package, or the like may also be used. Further, in the fourth embodiment, the dye sensitized transparent solar cell is used as the transparent solar cell, but the transparent solar cell is not limited thereto, and transparent solar cells such as organic transparent solar cells including organic thin film transparent solar cells, transparent innovative solar cells, transparent compound-based solar cells, transparent thin-film solar cells, etc., can be widely used. This also applies to the external transparent solar cell  96 . Further, in the fourth embodiment, the blue LED module formed in a long shape is used, but the blue LED module is not limited thereto, and for example, an LED module formed in a surcline type, square shape, round shape, or projector type may also be used. Further, in the fourth embodiment, the lamp cover is formed into a square shape, but the shape of the lamp cover is not limited thereto, and it may have any shape such as an elliptical shape, a round shape, and the like. Further, in the fourth embodiment, the lithium ion storage battery is used as an example of the storage battery (secondary battery), but other storage batteries (for example, a lead storage battery, a nickel storage battery, etc.) may also be used. 
     Fifth Embodiment 
     Next, a self-generated lighting fixture according to a fifth embodiment of the present invention will be described. 
       FIG. 7A  is a perspective view including a frame of a self-generated lighting fixture according to a fifth embodiment of the present invention,  FIG. 7B  is a cross-sectional view taken along the line A-A of  FIG. 7A , and  FIG. 7C  is a schematic view showing a configuration example of an electric circuit of the self-generated lighting fixture according to the fifth embodiment of the present invention. Note that in the fifth embodiment, elements that are different from those of the first embodiment will be mainly described, elements that are substantially the same as the elements described in the first embodiment will be given the same reference numerals, and description thereof will be omitted as much as possible. 
     The self-generated lighting fixture according to the fifth embodiment of the present invention includes: the long purple LED module  20 ; an external light signboard frame  90 , a picture display panel  93 , and the organic thin film transparent solar cell  100 . 
     The purple LED module  20  is formed by connecting a plurality of surface mount-type purple LED packages  1 . Each purple LED package  1  is disposed in the longitudinal direction of the purple LED module  20  at a predetermined interval, and radiates the UV light energy  73  upon receiving supply of the electric power from the power storage device  121  (lithium ion storage battery  120 ). The purple LED module  20  is disposed on the signboard to be irradiated (including the external light signboard frame  90 ) or the surrounding wall surface of the signboard in such a manner as being inclined at a predetermined angle, so that the picture display panel  93  is irradiated from an oblique direction (diagonally upward in the figure) with the UV light energy  73  radiated from the purple LED package  1 . An inclination angle of the purple LED module  20  can be represented by an angle at which a principal ray of the UV light energy  73  radiated from the purple LED package  1  is incident on the organic thin film transparent solar cell  100 , and for example, it is set in a range of 10 degrees or more and 60 degrees or less. 
     The external light signboard frame  90  is a frame installed at a signboard installation place such as a wall surface of a building. 
     The picture display panel  93  is integrally formed with the external light signboard frame  90  as a part of the external light signboard frame  90 , or is formed separately from the external light signboard frame  90 . The picture display panel  93  has a display surface (bulletin board) on which a picture to be displayed on the external signboard is displayed. When the picture display panel  93  is integrally formed with the external light signboard frame  90 , the picture to be displayed is pasted directly on the external light signboard frame  90  by painting, cutting characters or the like. The picture display panel  93  is an irradiation target surface which is irradiated with the UV light energy  73  from the purple LED package  1 , and is disposed outward. 
     The organic thin film transparent solar cell  100  is formed on the display surface of the picture display panel  93  in a planar shape so as to cover the display surface. An inner surface of the organic thin film transparent solar cell  100  is close to and faces the display surface of the picture display panel  93 . An outer surface of the organic thin film transparent solar cell  100  forms an outermost surface of the external light signboard. The display surface of the picture display panel  93  covered with the organic thin film transparent solar cell  100  is irradiated with the UV light energy  73  from the purple LED package  1  of the purple LED module  20 . Therefore, the display surface of the picture display panel  93  becomes a surface to be irradiated with the UV light energy  73  from the purple LED package  1  of the purple LED module  20 . Further, the display surface of the picture display panel  93  is also irradiated with the UV light energy  73  from the sunlight. Therefore, the organic thin film transparent solar cell  100  absorbs both the UV light energy  73  radiated from the purple LED package  1  of the purple LED module  20  and the UV light energy  73  from the sunlight, and generates the photovoltaic power by the photovoltaic effect. 
     (Electric Circuit) 
     The power control unit  112  controls the electric power to be supplied to the purple LED module  20  (purple LED package  1 ) which is a light source, and includes the commercial electric power as one of the electric powers to be controlled, and has the AC/DC converter  110  and the DC controller  111 . The AC/DC converter  110  converts the commercial electric power (AC) to DC power, upon receiving supply of commercial electric power (AC). The DC power converted by the AC/DC converter  110  is stored in the lithium ion storage battery  120  of the power storage device  121 . The DC controller  111  controls so that the photovoltaic power generated by the organic thin film transparent solar cell  100  is compatible with the purple LED module  20 . The electric power controlled by the DC controller  111  is stored in the lithium ion storage battery  120  of the power storage device  121 . 
     The power storage device  121  includes a lithium ion storage battery  120  stores electricity upon receiving supply of the electric power from the power control unit  112 , and supplies the electric power stored in the lithium ion storage battery  120  to the purple LED package  1  of the purple LED module  20 . The lithium ion storage battery  120  stores electricity supplied from the AC/DC converter  110  and the DC controller  111  of the power control unit  112 . The electric power stored in the lithium ion storage battery  120  is supplied to the purple LED module  20 . The electric power supplied to the purple LED module  20  is consumed to cause each purple LED package  1  to emit light (light up the purple LED module  20 ). 
     Further, the power storage device  121  has a detecting function of detecting stop of supply of the electric power from the power control unit  112 , and/or power failure, in addition to on (energizing)/off (cutoff) function of a power switch. Then, when the stop of supply of the electric power from the power control unit  112  and/or the power failure is detected by the detecting function, the power storage device  121  has an endless function of always turning on the purple LED package  1  by continuously supplying the electric power stored in the lithium ion storage battery  120  to the purple LED package  1  of the purple LED module  20  and resuming supply of the electric power to the purple LED package  1  of the purple LED module  20  upon receiving supply of the electric power from the power control unit  112 , the electric power being generated by the organic thin film transparent solar cell  100  by absorption of the UV light energy  73  radiated from the purple LED package  1  during the on-state. 
     Further, when a charged amount of the lithium ion battery  120  reaches a fully charged state upon receiving supply of the electric power from the power control unit  112 , the power storage device  121 , by itself, has an overcharge prevention function of stopping supply of the electric power from the power control unit  112 . Further, when supply of the electric power from the power control unit  112  is stopped by the overcharge prevention function and thereafter the electric power is consumed from the fully charged state to become storable, the power storage device  121  has a function of storing electricity upon receiving supply of the electric power generated by the organic thin film transparent solar cell  100  from the power control unit  112 , and when the storage amount of the lithium ion storage battery  120  is decreased to a preset remaining charged amount during this storage, the power storage device  121  has a function of resuming supply of the commercial electric power to the purple LED package  1  of the purple LED module  20  upon receiving supply of the commercial electric power from the power control unit  112 . Note that the setting of the remaining charged amount is the same as that in the fourth embodiment. 
     In the fifth embodiment of the present invention, each purple LED package  1  radiates the UV light energy  73 , by supplying the commercial electric power stored in the lithium ion storage battery  120 , to the purple LED module  20  by the power storage device  121  via the AC/DC converter  110 . Then, the organic thin film transparent solar cell  100  absorbs the UV light energy  73  radiated from each purple LED package  1 , and generates the photovoltaic power by the photovoltaic effect. Further, the organic thin film transparent solar cell  100  absorbs the UV light energy  73  from the sunlight, and generates the photovoltaic power by the photovoltaic effect. The photovoltaic power generated by the organic thin film transparent solar cell  100  in this manner is captured into the power storage device  121  via the DC controller  111 , stored in the lithium ion storage battery  120 , and thereafter supplied again to the purple LED module  20  by the power storage device  121 . As a result, it is possible to radiate the UV light energy  73  from the purple LED package  1  of the purple LED module  20  and to irradiate the display surface of the picture display panel  93  with the UV light energy  73 . 
     Further, when the stop of supply of the electric power from the power control unit  112  is detected due to some abnormality or power failure while the power supply switch is turned on, the power storage device  121  continuously supplies the electric power stored in the lithium ion storage battery  120 , to the purple LED package  1  of the purple LED module  20 . Thereby, it is possible to maintain the purple LED package  1  in the on-state (lighting state of the purple LED module  20 ). Further, the power storage device  121  stores electricity in the lithium ion storage battery  120  upon receiving the photovoltaic power from the power control unit  112 , the photovoltaic power being generated by the organic thin film transparent solar cell  100  using the UV light energy  73  radiated from the purple LED package  1  during the on-state and the photovoltaic power being generated by the organic thin film transparent solar cell  100  using the light energy of the sunlight, and resumes supply of the electric power to the purple LED package  1  therefrom. Thereby, it is possible to maintain the purple LED package  1  in the on-state while minimizing the consumption of commercial electric power. 
     Further, when supply of the electric power from the power control unit  112  is stopped by the overcharge prevention function and thereafter the electric power is consumed from the fully charged state to become storable, the power storage device  121  stores electricity in the lithium ion storage battery  120  upon receiving supply of the electric power from the power control unit  112 , the electric power being generated by the organic thin film transparent solar cell  100 , and when the storage amount of the lithium ion storage battery  120  is decreased to a preset remaining charged amount during this storage, the power storage device  121  resumes supply of the commercial electric power to the purple LED package  1  of the purple LED module  20  upon receiving supply of the commercial electric power from the power control unit  112 . Thereby, it is possible to maintain the purple LED package  1  in the on-state, while supplementing the shortage of the charged amount by supply of the commercial electric power, the shortage of the charged amount being caused by supply of the electric power generated by the organic thin film transparent solar cell  100 . 
     As described above, even if the power failure occurs while being in the lighting state of the obliquely inclined purple LED module  20 , the purple LED package  1  radiates the UV light energy  73  upon receiving supply of the electric power continuously from the lithium ion storage battery  120 , and the organic thin film transparent solar cell  100  repeats power generation by absorption of the UV light energy  73  to self-generate electricity, and stores it in the lithium ion storage battery  120 . Thereby, it is possible to achieve a longer life of the discharge capacity time of the lithium ion storage battery  120 . Further, the purple LED package  1  continuously emits the UV light energy  73  until the charged amount in the lithium ion storage battery  120  becomes zero as long as the power switch is not turned off (cut off). Therefore, it is possible to realize the self-generated lighting fixture having both the function as a lighting fixture responding to long-term emergency power failure and the power saving function during stop of the supply of the commercial electric power. Further, in many cases, the external lighting fixtures assumed in the fifth embodiment are installed on the walls of buildings beside sidewalks in downtown areas. Therefore, if the self-generated lighting fixture of the fifth embodiment is applied to such an external lighting fixture, it is possible to give a sense of safety and security to the surroundings by illuminating an entrance of the building and the sidewalk brightly at the time of the power failure. 
     Note that in the fifth embodiment, the purple LED package is used as the LED package, but the LED package is not limited thereto, and the blue LED package, the near-UV light LED package, the near infrared LED package, or the like may also be used. Further, in the fifth embodiment, the organic thin film transparent solar cell is used as the transparent solar cell, but the transparent solar cell is not limited thereto, and transparent solar cells such as organic transparent solar cells including dye sensitized transparent solar cells, transparent innovative solar cells, transparent compound-based solar cells, transparent thin-film solar cells, etc., can be widely used. Further, in the fifth embodiment, the lithium ion storage battery is used as an example of the storage battery (secondary battery), but other storage batteries (for example, a lead storage battery, a nickel storage battery, etc.) may also be used. Further, in the fifth embodiment, the picture display panel is used as the panel having an irradiation target surface, but it may be a panel displaying things other than a picture, or a panel without a picture or the like. 
     Sixth Embodiment 
     Next, a self-generated lighting fixture according to a sixth embodiment of the present invention will be described. 
       FIG. 8A  is a perspective view including the frame of the self-generated lighting fixture according to the sixth embodiment of the present invention,  FIG. 8B  is a cross-sectional view taken along the line A-A of  FIG. 8A , and  FIG. 8C  is a schematic view showing a configuration example of an electric circuit of the self-generated lighting fixture according to the sixth embodiment of the present invention. Note that in the sixth embodiment, elements that are different from those of the first embodiment will be mainly described, elements that are substantially the same as the elements described in the first embodiment will be given the same reference numerals, and description thereof will be omitted as much as possible. 
     The self-generated lighting fixture according to the sixth embodiment of the present invention includes: a frame  30 , an organic EL (Electro Luminescence) display panel  31  serving as a light source for illumination, and a dye sensitized transparent solar cell  95 . 
     The frame  30  houses the organic EL panel  31  and the dye sensitized transparent solar cell  95 , and is formed in a rectangular frame shape. 
     The organic EL panel  31  is lighted up by emitting the white light energy  68  upon receiving supply of the electric power. The organic EL panel  31  includes: a metal electrode  32 , an organic electron transporting layer  33 , an organic light emitting layer  34 , an organic hole transporting layer  35 , an ITO (indium tin oxide) transparent electrode  36 , and a transparent substrate  37 . The ITO transparent electrode  36 , the organic hole transport layer  35 , the organic light emitting layer  34 , the organic electron transport layer  33 , and the metal electrode  32  are stacked on the transparent substrate  37  in this order. The organic EL panel  31  radiates the white light energy  68  in such a manner that electrons carried from the metal electrode  32  through the organic electron transport layer  33  and holes carried from the ITO transparent electrode  36  through the organic hole transport layer  35  are combined in the organic light emitting layer  34 , and a light emitting material of the organic light emitting layer  34  is excited by the energy resulting from this combination. 
     The dye sensitized transparent solar cell  95  is disposed in a light emitting direction of the organic EL panel  31 . Specifically, the dye sensitized transparent solar cell  95  is formed on the surface on the opposite side of the ITO transparent electrode  36 , which is one main surface of the transparent substrate  37 . The dye sensitized transparent solar cell  95  is formed in a planar shape so as to cover the main surface of the transparent substrate  37 . The dye sensitized transparent solar cell  95  absorbs the white light energy  68  radiated from the organic EL panel  31 , and generates the photovoltaic power by the photovoltaic effect. 
     (Electric Circuit) 
     The power control unit  112  controls the electric power to be supplied to the organic EL panel  31  and includes the commercial electric power as one of the electric powers to be controlled, and has the AC/DC converter  110  and the DC controller  111 . The AC/DC converter  110  converts the commercial electric power (AC) to DC power, upon receiving supply of the commercial electric power (AC). The DC power converted by the AC/DC converter  110  is stored in the lithium ion storage battery  120  of the power storage device  121 . The DC controller  111  controls so that the photovoltaic power generated by the dye sensitized transparent solar cell  95  is compatible with the organic EL panel  31 . The electric power controlled by the DC controller  111  is stored in the lithium ion storage battery  120  of the power storage device  121 . 
     The power storage device  121  includes the lithium ion storage battery  120  that stores electricity upon receiving supply of the electric power from the power control unit  112 , and supplies the electric power stored in the lithium ion storage battery  120  to the organic EL panel  31 . The lithium ion storage battery  120  stores electricity supplied from the AC/DC converter  110  and the DC controller  111  of the power control unit  112 . The electric power stored in the lithium ion storage battery  120  is supplied to the organic EL panel  31 . The electric power supplied to the organic EL panel  31  is consumed for causing the organic light emitting layer  34  of the organic EL panel  31  to emit light (lighted up). 
     Further, the power storage device  121  has a detecting function of detecting stop of supply of the electric power from the power control unit  112 , and/or power failure, in addition to on (energizing)/off (cutoff) function of a power switch. When the stop of supply of the electric power from the power control unit  112  and/or the power failure is detected by the detecting function, the power storage device  121  has an endless function of always turning on the organic EL panel  31  by continuously supplying the electric power stored in the lithium ion storage battery  120  to the organic EL panel  31  and resuming supply of the electric power to the organic EL panel  31  upon receiving supply of the electric power generated by the dye sensitized transparent solar cell  95  by absorption of the white light energy  68  radiated from the organic EL panel  31  during the on-state. 
     Further, when the charged amount of the lithium ion battery  120  reaches a fully charged state upon receiving supply of the electric power from the power control unit  112 , the power storage device  121 , by itself, has an overcharge prevention function of stopping supply of the electric power, from the power control unit  112 . Further, when supply of the electric power from the power control unit  112  is stopped by the overcharge prevention function and thereafter the electric power is consumed from the fully charged state to become storable, the power storage device  121  has a function of storing the electric power upon receiving supply of the electric power from the power control unit  112 , the electric power being generated by the dye sensitized transparent solar cell  95 , and when the storage amount of the lithium ion storage battery  120  is decreased to a preset remaining charged amount during this storage, the power storage device  121  has a function of resuming supply of the commercial electric power to the organic EL panel  31  upon receiving supply of the commercial electric power from the power control unit  112 . Note that the setting of the remaining charged amount is the same as that in the fourth embodiment. 
     In the sixth embodiment of the present invention, the organic EL panel  31  radiates the white light energy  68  because the power storage device  121  supplies the commercial electric power stored in the lithium ion storage battery  120  to the organic EL panel  31  via the AC/DC converter  110 . Then, the dye sensitized transparent solar cell  95  absorbs the white light energy  68  radiated from the organic EL panel  31 , and generates the photovoltaic power by the photovoltaic effect. The photovoltaic power generated by the dye sensitized transparent solar cell  95  in this manner is captured into the power storage device  121  via the DC controller  111 , stored in the lithium ion storage battery  120 , and thereafter supplied again to the organic EL panel  31  by the power storage device  121 . As a result, it is possible to radiate the white light energy  68  from the organic EL panel  31  using the photovoltaic power generated by the dye sensitized transparent solar cell  95  and to use this emission for illumination. 
     Further, when the stop of supply of the electric power from the power control unit  112  is detected due to some abnormality or the power failure while the power supply switch is turned on, the power storage device  121  continuously supplies the electric power stored in the lithium ion storage battery  120 , to the organic EL panel  31 . Thereby, it is possible to maintain the organic EL panel  31  in the on-state (lighting state of the organic EL panel  31 ). Further, the power storage device  121  stores electricity in the lithium ion storage battery  120  upon receiving the photovoltaic power from the power control unit  112 , the photovoltaic power being generated by the dye sensitized transparent solar cell  95  using the white light energy  68  radiated from the on-state organic EL panel  31 , and resumes supply of the electric power to the organic EL panel  31  therefrom. Thereby, it is possible to maintain the organic EL panel  31  in the on-state while minimizing the consumption of commercial electric power. 
     Further, when supply of the electric power from the power control unit  112  is stopped by the overcharge prevention function and thereafter the electric power is consumed from the fully charged state to become storable, the power storage device  121  stores electricity in the lithium ion storage battery  120  upon receiving supply of the electric power from the power control unit  112 , the electric power being generated by the dye sensitized transparent solar cell  95 , and when the storage amount of the lithium ion storage battery  120  is decreased to a preset remaining charged amount during this storage, the power storage device  121  resumes supply of the commercial electric power to the organic EL panel  31  upon receiving supply of the commercial electric power from the power control unit  112 . Thereby, it is possible to maintain the organic EL panel  31  in the on-state, while supplementing the shortage of the charged amount by supply of the commercial electric power, the shortage of the charged amount being caused by supply of the electric power generated by the dye sensitized transparent solar cell  95 . 
     Even if the power failure occurs while being in the lighting state of the organic EL panel  31 , the organic EL panel  31  radiates the white light energy  68  upon receiving supply of the electric power continuously from the lithium ion storage battery  120 , and the dye sensitized transparent solar cell  95  repeats power generation to self-generate electricity by absorption of the white light energy  68 , and stores it in the lithium ion storage battery  120 . Thereby, it is possible to achieve a longer life of the discharge capacity time of the lithium ion storage battery  120 . Further, the organic EL panel  31  continues to radiate the white light energy  68  until the charged amount in the lithium ion storage battery  120  becomes zero as long as the power switch is not turned off (cut off). Therefore, it is possible to realize the self-generated lighting fixture having both the function as a lighting fixture responding to long-term emergency power failure and the power saving function during stop of the supply of the commercial electric power. 
     Note that in the sixth embodiment, the dye sensitized transparent solar cell is used as the transparent solar cell, but the transparent solar cell is not limited thereto, and transparent solar cells such as organic transparent solar cells including organic transparent thin film solar cells, transparent innovative solar cells, transparent compound-based solar cells, transparent thin-film solar cells, etc., can be widely used. Further, in the sixth embodiment, the lithium ion storage battery is used as an example of the storage battery (secondary battery), but other storage batteries (for example, a lead storage battery, a nickel storage battery, etc.) may also be used. 
     INDUSTRIAL APPLICABILITY 
     Currently used lighting fixture does not self-generate electricity by reusing the light energy radiated from the lighting fixture itself, and therefore much electric power is required. The self-generated lighting fixture of the present invention can self-generate the electric power by reusing the self-radiated light energy. Further, by providing a transparent solar cell that absorbs light energy from a light source to self-generate electricity, stable self-power generation can be calculated without being influenced by weather, and enormous power saving becomes possible, which helps to prevent global warming. 
     DESCRIPTION OF SIGNS AND NUMERALS 
     
         
           1  . . . Purple LED package 
           2  . . . Blue LED package 
           3  . . . Ultraviolet light LED package 
           10  . . . Purple LED element 
           11  . . . Blue LED element 
           17  . . . LED substrate 
           19  . . . Blue LED module 
           20  . . . purple LED module 
           21  . . . Purple LED module 
           23  . . . Ultraviolet LED module 
           25  . . . Titanium oxide apatite layer 
           26  . . . Back side lamp cover 
           31  . . . Organic EL panel 
           41  . . . LED module unit 
           68  . . . White light energy 
           73  . . . UV light energy 
           74  . . . Purple light energy 
           93  . . . Picture display panel 
           95  . . . Dye sensitized transparent solar cell 
           96  . . . External transparent solar cell 
           100  . . . Organic thin film transparent solar cell 
           105  . . . Lamp cover 
           110  . . . AC/DC converter 
           111  . . . DC controller 
           112  . . . Power control unit 
           120  . . . Lithium ion storage battery 
           121  . . . Electric storage device