JP5504715B2 - Lighting device - Google Patents

Description

The present invention relates to lighting equipment.

  As a roof structure used for a waiting space such as a bus stop or a taxi stand or a carport, a roof structure having a light-shielding roof surface has been widely used for a long time. In recent years, a combination of a light-transmitting plate material and a frame member of a light-transmitting plate material made of a metal shape has become widespread. The roof structure is generally made of polycarbonate colored on a light-transmitting plate, and can be viewed in an upward view, so that a comfortable environment can be obtained.

  However, at bus stops, taxi stands, and carports, lighting may be required at night, but bus stops, taxi stands, or carports that are located away from the station are located away from the station. As described above, it is difficult to secure a power source in a place where there is no illumination in the periphery and particularly where illumination is required. Therefore, comfortable illumination cannot be obtained at night.

  In view of this, a roof structure having a lighting device using solar energy has been developed so that nighttime lighting can be secured even in places where it is difficult to secure a power source. In particular, roof structures with lighting devices have been developed that temporarily brighten places where it is difficult to obtain commercial power, for example, carports, warehouses, storerooms, and the like (see, for example, Patent Documents 1 to 3). These lighting devices include a solar panel, a battery, and a fluorescent lamp, and can generate nighttime lighting by generating electricity with the solar panel in the daytime and storing it in the battery.

JP 2007-113255 A JP 2007-154509 A JP 2007-317360 A

  However, in the conventional roof structure, when the roof surface is light-shielding or when the solar panel is provided so as to cover the roof surface, even under the daytime, Since sunlight was not inserted and the ceiling surface was darkened, there was a problem that a feeling of openness could not be obtained and a feeling of blockage was given to the user.

The present invention was devised to solve the above problems, can brighten below the light shielding portion, and the object is to provide a lighting equipment which can obtain a sense of openness daytime To do.

As means for solving the above-mentioned problems, the present invention provides a light guide plate configured to cover an end portion from an upper portion of a light shielding portion to a lower portion, and to face the end portion of the light shielding portion. Reflection means provided on the outer end surface of the light guide plate, the light shielding portion is configured by a roof, the light guide plate is an upper plate portion along the upper surface of the light shielding portion, and A lower plate portion along the lower surface of the light shielding portion, and a connecting portion that connects the upper plate portion and the lower plate portion, and the light guide plate is disposed so as to cover a tip portion of the roof. The upper plate portion and the lower plate portion are fixed so as to be parallel to the roof by being bolted only to the upper surface of the roof via a flat bracket, Sunlight incident on the plate is moved downward by the reflecting means while traveling in the light guide plate. The light shielding part is guided downward from the upper part of the light shielding part so as to wrap around the end part, and the lower part of the light shielding part is brightened, and the entire surface of the lower plate part becomes an illumination surface. This is a lighting device.

According to such a configuration, even when the roof surface is light-shielding or when the solar panel is provided so as to cover the roof surface, sunlight can be circulated below the light shielding portion. Thus, the lower part of the light shielding part can be brightened and a feeling of opening can be obtained. In addition, by concentrating sunlight on the upper plate part and efficiently transmitting it to the lower plate part through the connecting part in the light guide plate, it is possible to illuminate the lower surface of the light shielding part. The lower part can be brightened. Moreover, the lower part of a roof can be brightened and an open feeling can be acquired by attaching the illuminating device of this invention also with respect to the existing light-shielding roof. Furthermore, since the light guide plate plays the role of a kite, rainwater treatment can be performed by installing a vertical kite at an appropriate place such as an end of the light guide plate.

Further, the present invention is provided on the light guide plate configured to cover the end portion from the upper portion of the light shielding portion to the lower portion, and on the outer end surface of the light guide plate facing the end portion of the light shielding portion. Reflecting means, and the reflecting means is configured by installing a reflection sheet on the outer end face of the light guide plate in the light guide plate manufacturing process, and the sunlight travels through the light guide plate. The light guide plate is configured such that the light is reflected downward by the reflecting means and guided downward so as to wrap around the end portion from above the light shielding portion, and the lower portion of the light shielding portion is brightened. Comprises an upper plate portion along the upper surface of the light shielding portion, a lower plate portion along the lower surface of the light shielding portion, and a connecting portion for connecting the upper plate portion and the lower plate portion, Sunlight incident on the upper plate portion of the light guide plate reflects inside the light guide plate while the lower plate portion. In the process proceeds, the entire surface of the lower plate portion is illumination apparatus characterized by constituting the illuminated surface.

According to such a configuration, even when the roof surface is light-shielding or when the solar panel is provided so as to cover the roof surface, sunlight can be circulated below the light shielding portion. Thus, the lower part of the light shielding part can be brightened and a feeling of opening can be obtained. In addition, by concentrating sunlight on the upper plate part and efficiently transmitting it to the lower plate part through the connecting part in the light guide plate, it is possible to illuminate the lower surface of the light shielding part. The lower part can be brightened. Furthermore, the reflection means can be formed simply by attaching the reflection sheet to the end face of the light guide plate, and the manufacturing process becomes easy.

  Further, the present invention is characterized in that the reflection sheet is composed of a laminate film obtained by laminating an aluminum foil and a resin film.

  According to such a configuration, the reflection sheet can be easily installed at the end of the light guide plate, and the light reflectance can be increased.

  Furthermore, the present invention is characterized in that at least the lower plate portion of the light guide plate contains a phosphor or a pigment therein.

  According to such a configuration, the illuminance below the light shielding portion can be increased.

  The present invention is further characterized by further comprising a solar panel that converts solar energy into electrical energy, a battery that stores electrical energy converted by the solar panel, and a light source for illumination.

  According to such a configuration, since solar energy is converted into electric energy by the solar panel and stored in the battery, comfortable illumination can be obtained by the illumination light source even at night.

  Furthermore, the present invention is characterized in that the solar panel is configured separately from the light guide plate and is installed on an upper surface of the roof.

  According to such a configuration, a large area of the solar panel can be secured, and sufficient electric energy can be obtained.

  Further, the present invention is characterized in that the illumination light source is constituted by a light emitting diode.

  According to such a configuration, it is possible to obtain bright illumination with a small amount of power consumption, and to achieve downsizing of the illumination light source.

  Furthermore, the present invention is characterized in that the illumination light source is disposed at a predetermined interval along the longitudinal direction of the front end surface of the lower plate portion of the light guide plate.

  According to such a structure, the lower part of the light shielding part can be uniformly brightened without unevenness.

  According to the present invention, it is possible to brighten the lower part of the light shielding part and to exhibit an excellent effect that a feeling of opening can be obtained even in the daytime.

It is the whole perspective view which showed the state which attached the illuminating device which concerns on 1st embodiment to the roof structure. It is sectional drawing which showed the illuminating device which concerns on 1st embodiment. It is the perspective view which showed the illuminating device which concerns on 1st embodiment. It is the perspective view which showed the 1st modification of the illuminating device which concerns on 1st embodiment. It is the perspective view which showed the 2nd modification of the illuminating device which concerns on 1st embodiment. It is the whole perspective view which showed the state which attached the illuminating device which concerns on 2nd embodiment to the roof structure. It is the perspective view which showed the illuminating device which concerns on 2nd embodiment. It is sectional drawing which showed the illuminating device which concerns on 2nd embodiment, Comprising: (a) is the figure which showed the reflective state of the daytime light, (b) is the figure which showed the reflective state of the light at night. It is sectional drawing which showed the light source for illumination of the illuminating device which concerns on 2nd embodiment. It is the perspective view which showed the modification of the illuminating device which concerns on 2nd embodiment. It is the whole perspective view which showed the state which attached the illuminating device which concerns on 2nd embodiment to the roof structure of a fence. It is sectional drawing which showed the state which attached the illuminating device which concerns on 2nd embodiment to the roof structure of a fence. It is the perspective view which showed the illuminating device which concerns on 3rd embodiment. It is sectional drawing which showed the illuminating device which concerns on 3rd embodiment, Comprising: (a) is the figure which showed the reflective state of the daytime light, (b) is the figure which showed the reflective state of the light at night. It is the perspective view which showed the light source for illumination of the illuminating device which concerns on 3rd embodiment. It is the figure which showed the modification of the illuminating device which concerns on 3rd embodiment, (a) is sectional drawing which showed the 1st modification, (b) is sectional drawing which showed the 2nd modification, ( c) is a cross-sectional view showing a third modification. It is sectional drawing which showed the 4th modification of the illuminating device which concerns on 3rd embodiment.

(First embodiment)
First, the structure of the illuminating device and roof structure with an illuminating device which concern on 1st embodiment is demonstrated.

  As shown in FIG. 1, the roof structure 2 with a lighting device according to the first embodiment is used as a roof for a carport, for example, and has a light-shielding roof 3 in this embodiment. Yes. The roof 3 is made of a panel material made of a member having corrosion resistance and weather resistance such as aluminum or an aluminum alloy. As this panel material, for example, a sandwich honeycomb panel including an aluminum alloy honeycomb core material inside and sandwiching the core material with an aluminum alloy surface material may be used. The roof 3 has a rectangular shape in plan view. The roof 3 is supported by pillars 4. The pillar 4 is disposed at a position offset inward by a predetermined distance from the four corners of the roof 3, and is configured such that the peripheral edge of the roof 3 projects outward from the position of the pillar 4. The column 4 is made of an extruded shape made of aluminum or aluminum alloy. In the present embodiment, the pillar 4 is formed in a hollow shape (hollow), but may be solid (solid).

  The lighting device 1 is attached to a part of the peripheral edge of the roof 3. Specifically, the lighting device 1 is attached along the side portion extending in the X-axis direction at both ends in the width direction (Y-axis direction in FIG. 1) of the roof 3. The illuminating device 1 includes a light guide plate 10 configured to cover an end portion from an upper portion of a roof 3 that is a light shielding portion and to extend to a lower portion, and a light guide plate facing the end portion of the light shielding portion (roof 3). 10 and reflecting means 30 provided on the outer end face.

  As shown in FIG. 2, the light guide plate 10 transmits light introduced into the plate material in a flat plate direction (a direction in which the plate spreads) while totally reflecting the light, and the light is processed while being transmitted. The illumination effect is obtained by using a phenomenon in which light reflected by the surface of the plate material is changed in direction and light having a component larger than the total reflection critical angle emerges on the surface of the plate material. The light guide plate 10 is made of, for example, a light transmissive resin plate such as polymethyl methacrylate, polycarbonate, polystyrene, or acrylic. This light-transmitting resin plate has a low light transmittance as compared with a glass plate, but can sufficiently secure the transmittance as the light guide plate 10. Further, since the light-transmitting resin plate has high strength and is lightweight, it can cope with an increase in the area of the light guide plate 10. In the present embodiment, the light guide plate 10 is made of a light transmissive resin plate. However, the material is not limited to this, and the light guide plate 10 may be made of a light transmissive glass plate. In addition, the light guide plate 10 may be configured to have a plate shape by arranging a plurality of rod-shaped light guide members (not shown).

  2 and 3, the light guide plate 10 includes an upper plate portion 11 along the upper surface of the light shielding portion (roof 3), a lower plate portion 13 along the lower surface of the light shielding portion (roof 3), and an upper plate. A connecting portion 12 that connects the plate portion 11 and the lower plate portion 13 is provided. The connection part 12 is a part which covers and opposes the front-end | tip part of a light-shielding part (roof 3), Comprising: The light-guide plate 10 is attached so that the peripheral front-end | tip part of the roof 3 projected outside may be covered. Both the upper plate portion 11 and the lower plate portion 13 are formed in a flat plate shape and are parallel to each other. The connecting portion 12 is formed in a circular arc shape in cross section. The width dimension of the lower plate portion 13 (the dimension extending in the width direction of the roof 3 along the roof surface) is smaller than the width dimension of the upper plate portion 11, and the light guide plate 10 has a J-shaped cross section. Yes. The lower plate portion 13 is close to the lower surface of the roof 3 and constitutes an illumination surface that illuminates the roof 3. In the light guide plate 10, an upper plate portion 11, a connecting portion 12, and a lower plate portion 13 are integrally formed. Note that the light guide plate 10 may be formed by dividing and molding each part as appropriate and integrated with an adhesive or the like.

  The light guide plate 10 is bolted to the upper surface of the roof 3 via a flat bracket 14, and is fixed so that the upper plate portion 11 and the lower plate portion 13 are both parallel to the roof 3. Thus, since the light guide plate 10 is attached to the roof 3 via the bracket 14, the light guide plate 10 is disposed with a predetermined gap from the roof 3. Accordingly, rainwater flows through this gap and flows into the inside of the connecting portion 12 of the light guide plate 10. That is, since the light guide plate 10 plays the role of a kite, rainwater treatment can be performed by installing a vertical rod (not shown) at an appropriate position such as an end of the light guide plate 10. In addition, a drain hole (not shown) may be formed in the connection part 12 with a predetermined pitch along the longitudinal direction, and a vertical rod may be abbreviate | omitted.

At least the lower plate portion 13 (in this embodiment, the entire light guide plate 10) of the light guide plate 10 contains a phosphor therein. For example, calcium phosphate 3Ca ₃ (PO ₄ ) ₂ .Ca (F, Cl) ₂ : Sb is used as the phosphor. When the phosphor is included in the light guide plate 10, near-ultraviolet rays or visible light is irradiated to the phosphor. Thus, since the fluorescent light is emitted, the illuminance of the light guide plate 10 is increased. Further, the light guide plate 10 may contain a pigment instead of the phosphor. When the light guide plate 10 contains a pigment, the illumination can be colored in a desired color, so that it can be adapted to the surrounding environment and the aesthetics can be enhanced.

  The reflection means 30 is configured by a reflection sheet, and is installed on the outer end surface of the light guide plate 10 facing the end portion of the roof 3, that is, on the outer peripheral surface of the connecting portion 12. The reflection sheet is composed of a laminate film obtained by laminating an aluminum foil and a resin film. The laminate film is formed so that the resin film sandwiches the aluminum foil from both sides, and is configured to block the aluminum foil from the outside air. Of the two-layer resin film, at least the resin film located on the light guide plate 10 side is constituted by a transparent resin film. The reflecting means 30 is bonded to the light guide plate 10 with an adhesive having a lower optical refractive index than the light guide plate 10. The reflecting means 30 includes an upper surface (sunlight incident surface) of the light guide plate 10 (upper plate portion 11) located at the upper portion of the roof 3 and a light guide plate 10 (lower plate portion 13) located at the lower portion of the roof 3. You may install in each surface of the light-guide plate 10 except an end surface (sunlight emission surface).

  Note that the aluminum foil may be replaced with other materials as long as it has a mirror surface even if it is another metal. Further, instead of the laminate tube, a foamed PET (polyethylene terephthalate) sheet or a foamed polycarbonate sheet made of foamed resin (foamed plastic) may be employed as the reflecting means 30. The diameter of the foam formed at this time is about several μm, but the higher the density of the foam, the higher the reflectance. Since the foamed PET sheet or the foamed polycarbonate sheet has a light reflectance higher than that of the laminate film, the light loss inside the light guide plate 10 can be suppressed.

  As shown in FIG. 1, in addition to the light guide plate 10 and the reflecting means 30, the lighting device 1 includes a solar panel 40 that converts solar energy into electric energy, and a battery that stores the electric energy converted by the solar panel 40 (FIG. 1). (Not shown) and a light source 50 for illumination.

  As shown in FIG. 1, the solar panel 40 is configured separately from the light guide plate 10 and is installed on the upper surface of the roof 3. The solar panel 40 may be constituted by a known solar panel, but in the present embodiment, for example, a thin film solar cell is provided with a light transmissive back sheet. The solar panel 40 is in the form of a film and has appropriate flexibility, and is a flexible panel that can follow the surface shape of the roof 3. As the thin film solar cell, for example, a thin film silicon solar cell is used. A thin-film silicon solar cell is formed by forming a thin film of several μm made of amorphous silicon (a-Si: H), microcrystalline silicon (μc-Si: H), etc. on a flexible substrate. It is formed in a single large area. The thin film is formed by a CVD (chemical vapor deposition) method or the like. The thin-film solar battery cell has a lower power generation efficiency than a conventional crystal wafer-type solar power generation cell, but the power generation amount is ensured by forming it in a large area.

  In this embodiment, a thin film solar cell formed by forming a thin film with a thickness of several μm on the entire surface of the substrate is used, but the present invention is not limited to this. For example, pc-Si type (polycrystalline Si type) solar cells having a thickness of 150 to 300 μm may be arranged on the substrate with a predetermined gap.

  A back sheet (not shown) is provided so as to cover the surface of the thin film solar cell in order to protect the thin film. In this embodiment, the back sheet is provided so as to cover the upper surface of the thin film solar cell. Has been. The back sheet transmits at least part of sunlight. Specifically, the back sheet has a three-layer structure, and the outermost layer is a film or sheet material (fluorine resin film, fluororesin coating film, heat-resistant low oligomer, PET film, etc.) excellent in weather resistance. Configured. The intermediate layer is configured by installing a light-transmitting vapor-deposited PET film having excellent water vapor barrier properties. The innermost layer is composed of an electrically insulating PET film excellent in heat resistance, moisture resistance, electric resistance and the like.

  The solar panel 40 configured as described above is fixed to the upper surface of the roof 3 using a known fixing jig such as a bolt. Note that the solar panel 40 may be fixed to the upper surface of the roof 3 with an adhesive.

The battery is electrically connected to the solar panel 40 and the illumination light source 50 and is accommodated in the pillar 4, for example. Note that the battery storage position is not limited to this, and may be another place as long as it is not exposed to wind and rain such as the lower side of the roof 3. The battery is composed of, for example, an alkaline storage battery, a nickel-hydrogen storage battery, a lithium ion battery, or the like. The battery is not limited to the above-described battery, and may be any storage battery as long as it is a small, light, and high-performance rechargeable battery. Among these, a lithium ion battery is particularly preferable because of its high energy density. Generally, LiCoO ₂ is used for the positive electrode, C is used for the negative electrode, and an organic electrolyte containing Li ions such as LiClO ₄ and LiPF ₆ is used for the electrolyte as the separator. Here, Li ions can enter and leave the crystal of the positive electrode and negative electrode materials, and can be charged and discharged. In the Li ion battery, Li ions move from the positive electrode to the negative electrode through the separator during charging, and conversely, Li ions move from the negative electrode to the positive electrode during discharging.

  The illumination light source 50 is composed of a light emitting diode. The light emitting diode may be of any type as long as it utilizes a light emitting element that emits visible light or ultraviolet light by recombination of electrons and holes. As the light emitting element, for example, any of red, green, and blue light emitting diodes may be used, or white light may be emitted by combining these three color light emitting diodes. If a blue diode is used, the viewer's emotion can be cooled down to give a calm impression.

  In the present embodiment, the light emitting diode includes a light emitting element in which at least a light emitting layer is a nitride semiconductor, and an inorganic phosphor that emits fluorescence by absorbing at least a part of light emitted from the light emitting element and converting the wavelength. I have it. Specifically, an ultraviolet LED light emitting element that can emit light at 350 nm to 390 nm as the main peak of the emission spectrum is used. In this case, the light emitting layer is provided with a low-temperature buffer layer such as AlN on a sapphire substrate, for example, by metal organic chemical vapor deposition (MOCVD), and an AlGaN thick film, an AlGaN-based n-type nitride semiconductor, and the like. A p-type nitride semiconductor thin film is formed, and an InAlGaN light emitting layer is formed as a cladding layer. Of course, various emission wavelengths can be selected depending on the material used for the semiconductor layer and its composition.

Examples of the inorganic phosphor that emits white light include 3Ca ₃ (PO ₄ ) ₂ .Ca (F, Cl) ₂ : Sb. In addition, a mixed phosphor that emits white light and is composed of a phosphor mixture of blue, green, and red light emission. When these fluorescent materials are used, they may be formed by mixing an appropriate amount of these fluorescent materials in a light-transmitting inorganic member such as glass or a light-transmitting organic member such as resin. Further, after applying a mixture of the fluorescent material, the organic binder, and the solvent to the inner wall or the outer wall of glass or the like, it may be heated to decompose and gasify only the binder and the solvent. With such a light emitting device, bright illumination can be obtained by efficiently converting the ultraviolet rays emitted from the light emitting diodes into white light by the inorganic phosphor.

  The illumination light source 50 is disposed on the front end surface of the lower plate portion 13 of the light guide plate 10 at a predetermined interval along the longitudinal direction thereof.

  As shown in FIG. 2, a reflector 51 is provided around the light emitting diode to direct the traveling direction of the emitted light forward (forward in the extending direction of the lower plate portion 13). The reflector 51 is formed by pressing an aluminum plate or an aluminum alloy plate excellent in thermal shock resistance, and its surface (illumination surface) is polished by CMP (Chemical Mechanical Polishing). As a result, the surface roughness is reduced and the light reflectance is increased. The reflector 51 is formed in an umbrella shape so as to cover the light emitting part at the tip of the light emitting diode, and reflects light irradiated backward from the light emitting diode in the front direction of the light emitting diode. Here, since the roof 3 is formed to be curved downward, the light reflected in the front direction of the light emitting diode through the reflector 51 illuminates the lower surface of the roof 3. The reflector 51 is not limited to aluminum or aluminum alloy. For example, a glass reflector in which a metal such as aluminum is deposited on the surface of a glass plate may be used.

  Next, the effect | action of the illuminating device 1 by the said structure and the roof structure 2 with an illuminating device is demonstrated.

  According to the illuminating device 1 and the roof structure 2 with the illuminating device, even if the roof 3 is light-shielding, in the daytime, sunlight is transmitted through the light guide plate 10 to the roof 3 (light shielding portion). The lower part of the roof 3 can be brightened by wrapping downward, and a feeling of opening can be obtained. Specifically, as shown in FIG. 2, sunlight irradiated on the upper plate portion 11 of the light guide plate 10 enters the upper plate portion 11 and proceeds to the connecting portion 12 while repeating reflection inside thereof. Further, it is transmitted to the lower plate portion 13. At this time, on the outer peripheral surface of the connecting portion 12, sunlight often hits the surface at an angle larger than the total reflection critical angle, but since the reflecting means 30 is installed on the outer peripheral surface, all light is reflected inward. And loss of light transmission can be prevented. In the lower plate part 13, a part of sunlight is reflected and the other part is emitted from the surface, so that the entire surface of the lower plate part 13 becomes an illumination surface along the depth direction of the roof 3. As a result, a strip-shaped illumination surface is formed along the edge of the roof 3, and the lower part of the roof 3 can be brightened. Moreover, since the light radiate | emitted from the lower board part 13 illuminates the lower surface of the roof 3, and reflects below, the illumination effect like indirect illumination can also be acquired.

  Furthermore, according to the illuminating device 1 of this embodiment, it can be easily attached to the existing roof surface, and the illumination effect can be easily obtained.

  Here, since at least the lower plate portion 13 of the light guide plate 10 contains a phosphor therein, the near-ultraviolet rays and visible light are irradiated on the phosphor in the light guide plate 10 to emit fluorescence. The illuminance of the light plate 10 is increased. Further, when the light guide plate 10 contains a pigment instead of the phosphor, the illumination can be colored in a desired color, so that it can be adapted to the surrounding environment and the aesthetics can be enhanced.

  Further, in the present embodiment, the reflecting means 30 is configured by laying the reflecting sheet on the outer end face of the light guide plate 10, so that the reflecting means 30 can be formed simply by sticking the reflecting sheet to the end face of the light guide plate 10. The manufacturing process becomes easy. Furthermore, since the reflection sheet is composed of a laminate film obtained by laminating an aluminum foil and a resin film, a high light reflectance can be obtained by the aluminum foil, and the aluminum foil can be blocked from the outside air by the resin film. Therefore, corrosion of the aluminum foil can be prevented, and a decrease in light reflectance can be suppressed.

  Further, as shown in FIG. 1, the lighting device 1 further includes a solar panel 40, a battery, and an illumination light source 50. Therefore, the solar panel 40 converts solar energy into electric energy and stores it in the battery. The illumination light source 50 can provide comfortable illumination even at night. In particular, since the solar panel 40 is configured separately from the light guide plate 10 and installed on the upper surface of the roof 3, a large area of the solar panel 40 can be ensured and sufficient electric energy can be obtained. it can.

  In addition, since the illumination light source 50 is composed of light emitting diodes, bright illumination can be obtained with a small amount of power consumption, and the illumination light source 50 can be downsized. Further, since the illumination light source 50 is disposed on the front end surface of the lower plate portion 13 of the light guide plate 10 at a predetermined interval along the longitudinal direction, the lower portion of the light shielding portion is uniformly brightened uniformly. can do.

  Next, with reference to FIG. 4, the 1st modification of the illuminating device 1 which concerns on 1st embodiment is demonstrated. This illuminating device 1 ′ is shown in FIG. 4, whereas the illuminating device 1 shown in FIGS. 1 to 3 extends in the depth direction (X direction) at the peripheral edge of the roof 3. Thus, it is characterized by being provided intermittently in the depth direction (X direction shown in FIG. 4) at the peripheral edge of the roof 3 ′. The roof 3 'is formed of a folded plate roof, and includes a mountain part 3'a and a valley part 3'b. The illuminating device 1 ′ has the same depth dimension (length in the X-axis direction) as the horizontal portion of the mountain portion 3′a, and the end portion (Y direction end portion) of each mountain portion 3′a of the roof 3 ′. Each is provided. Note that the cross-sectional shape and other configurations of the illumination device 1 ′ are the same as those of the illumination device 1 of FIG.

  According to such a configuration, it is possible to obtain the same function and effect as the lighting device 1, and the function and effect that the lighting device 1 ′ can be installed even if it has an uneven shape like the roof 3 ′. Can be obtained. Further, at night, when an illumination light source (not shown) provided on the front end surface of the lower plate portion 13 is turned on, the lower surface of the mountain portion 3'a and the lower surfaces of the inclined portions 3'c on both sides thereof are respectively illuminated. A bright portion is linearly formed for each mountain portion 3′a, and a striped illuminated portion (the lower surface of each mountain portion 3′a and the inclined portion 3′c) is formed on the lower surface of the roof 3 ′. As a result, a light impression can be given to the viewer.

  In the present embodiment, the lighting device 1 ′ is attached to the peak 3 ′ a of the roof 3 ′, but is not limited thereto, and may be attached to the valley 3 ′ b. However, it is preferable that the lighting device 1 ′ is attached to the mountain portion 3 ′ a in consideration of the water finish such as rainwater and the shape of the lighting portion.

  Next, with reference to FIG. 5, the 2nd modification of the illuminating device 1 which concerns on 1st embodiment is demonstrated. This illuminating device 1 ″ is different from the illuminating device 1 shown in FIGS. 1 to 3 in that the connecting portion 12 is formed in an arc shape in cross section, but as shown in FIG. 5, the connecting portion of the roof 3 ″. The cross section of 12 ″ is a lateral V-shape projecting outward. Depending on the shape of the connecting portion 12 ″, the reflecting means 30 ″ is also formed in a lateral V-shape. Since the other configuration of the illumination device 1 ″ is the same as that of the illumination device 1 of FIG.

  According to such a configuration, the same effect as the lighting device 1 can be obtained. In addition, sunlight is transmitted from the upper plate portion 11 to the lower plate portion 13 ″ through the connecting portion 12 ″ in the light guide plate 10 ″. Thus, it is possible to obtain an operational effect of being able to efficiently wrap around with a small number of reflections.

(Second embodiment)
Next, the structure of the illuminating device and roof structure with an illuminating device which concern on 2nd embodiment is demonstrated.

  As illustrated in FIG. 6, the roof structure 102 with a lighting device according to the second embodiment is used as a roof for a bus stop, for example, and includes a light-transmitting roof 103. The roof 103 is composed of a plurality of light transmissive plates 103a. The light transmissive plate member 103a is formed, for example, in a substantially rectangular shape in plan view, and its peripheral portion is supported by a frame member (beam member 105) to constitute a roof surface.

  The frame member is configured to have a grid-like section with a beam member 105 made of a metal shape member. The beam member 105 is supported by the column member 104. The column member 104 is erected on the ground at a predetermined interval, and has a base plate at its lower end. Anchor bolts (not shown) provided on the foundation of the ground are inserted through the base plate to fix the column member 104 to the ground. The beam member 105 includes a large beam 105a spanned between adjacent column members 104, a plurality of cantilever beams 105b extending from the large beam 105a, and a connecting beam 105c spanned between the end portions of the cantilever beam 105b. Has been. These beam members 105 are formed in a hollow shape, and reinforcing ribs (not shown) are formed inside or outside as required.

The beam member 105 and the column member 104 are made of extruded shapes made of aluminum or aluminum alloy. The extruded shape made of aluminum alloy is formed on the basis of 6063 alloy. The extruded profile based on the 6063 alloy has high strength and toughness because Mg ₂ Si is finely precipitated in the matrix by heat treatment after extrusion. Furthermore, the surface of the extruded shape material is subjected to an anodized film treatment, which is excellent in corrosion resistance and weather resistance. In the process of anodizing film treatment, it is possible to improve the appearance as a shape material of various colors by incorporating a pigment into the surface oxide film before sealing treatment. In this embodiment, the beam member 105 and the column member 104 are formed in a hollow shape (hollow), but may be in a solid state (solid).

  The beam member 105 is configured to support the peripheral portion of the light transmissive plate member. Specifically, a holding groove (not shown) is formed on each of the side surfaces of the large beam 105a, the cantilever beam 105b, and the connecting beam 105c on the light transmitting plate member 103a side, and the light transmitting plate member is formed in the holding groove. The periphery of 103a is inserted and supported. The grip groove is formed by opening the side surface of the hollow beam member 105 so that the hollow portion of the beam member 105 constitutes the internal space of the grip groove.

  In the present embodiment, the lighting device 101 is provided below the roof 103. The illuminating device 101 is fixed so as to come into contact with the lower surface of the light transmissive plate member 103a by a known mounting jig such as a bracket or a bolt (not shown). The lighting device 101 may be fixed to the lower surface of the light transmissive plate 103a with an adhesive. As shown in FIGS. 7 and 8, the lighting device 101 is opposed to the light guide plate 110 configured to cover the end portion from the upper portion of the light shielding portion and to go to the lower portion, and the end portion of the light shielding portion. The reflection means 130 is provided on the outer end surface of the light guide plate 110.

  The light guide plate 110 transmits light introduced into the plate material in a flat plate direction (direction in which the plate spreads) while totally reflecting the light, and the light is reflected on the processed plate material surface while being transmitted. The lighting effect is obtained by changing the direction and using a phenomenon in which light having a component larger than the total reflection critical angle emerges on the surface of the plate. The light guide plate 110 is made of, for example, a light transmissive resin plate such as polymethyl methacrylate, polycarbonate, polystyrene, or acrylic. This light-transmitting resin plate has a low light transmittance as compared with the glass plate, but can sufficiently secure the transmittance as the light guide plate 110. Moreover, since the light-transmitting resin plate has high strength and is lightweight, it can cope with an increase in the area of the light guide plate 110. In the present embodiment, the light guide plate 110 is made of a light transmissive resin plate. However, the material is not limited to this, and the light guide plate 110 may be made of a light transmissive glass plate.

  In this embodiment, the light shielding unit is configured by a solar panel 140 that converts solar energy into electric energy, and a light guide plate 110 is provided so as to surround the solar panel 140. The illumination light source 150 includes a solar panel 140 that serves as a light shield, and further includes a battery (not shown) that stores electrical energy converted by the solar panel 140, and an illumination light source 150. ing.

  The light guide plate 110 includes an upper plate portion 111 covering the upper surface of the solar panel 140, a lower plate portion 113 covering the lower surface of the solar panel 140, an end portion of the solar panel 140, and an upper plate portion 111 and a lower plate portion 113. And a connecting portion 112 that connects the two. The upper plate portion 111, the lower plate portion 113, and the connecting portions 112 and 112 are integrally formed, and the light guide plate 110 has a cylindrical shape. In addition, the light guide plate 110 has a thin cylindrical shape having an inner space portion on the inner side with respect to the length dimension of the upper plate portion 111 and the lower plate portion 113. In the light guide plate 110, an upper plate portion 111, a connecting portion 112, and a lower plate portion 113 are integrally formed. In addition, the light guide plate 110 may be formed by dividing and molding each part and integrating them with an adhesive or the like.

  The upper plate portion 111 and the lower plate portion 113 are both flat and have the same thickness, and cover the entire surface of the solar panel 140 from above and below, respectively. The upper plate portion 111 and the lower plate portion 113 are arranged in parallel to each other with an interval slightly larger than the thickness of the solar panel 140. That is, the cylindrical shape of the light guide plate 110 has a cross-sectional shape (a shape including a clearance into which the solar panel 140 can be inserted) that is substantially the same as the cross section of the solar panel 140. The solar panel 140 is installed between the upper plate portion 111 and the lower plate portion 113 by being inserted into the inner space from the side. The lower plate portion 113 constitutes an illumination surface that illuminates the lower portion of the roof 103.

  The connecting portion 112 is integrally formed at both ends of the upper plate portion 111 and the lower plate portion 113 so as to surround both ends of the solar panel 140 from the outside. The connecting portion 112 is a portion that connects the upper plate portion 111 and the lower plate portion 113, and has an inner portion 112 a having a rectangular cross section that connects the upper plate portion 111 and the lower plate portion 113, and an outer side of the inner portion 112 a. The outer end portion 112b having a semicircular cross section is connected. And the outer peripheral surface of the outer side edge part 112b becomes an outer side end surface in which the reflection means 130 is provided.

At least the lower plate portion 113 (in this embodiment, the entire light guide plate 110) of the light guide plate 110 contains a phosphor therein. For example, calcium phosphate 3Ca ₃ (PO ₄ ) ₂ .Ca (F, Cl) ₂ : Sb is used as the phosphor. When the phosphor is included in the light guide plate 110, near ultraviolet rays or visible light is irradiated to the phosphor. Thus, since the fluorescent light is emitted, the illuminance of the light guide plate 110 is increased. Further, the light guide plate 110 may contain a pigment instead of the phosphor. When the light guide plate 110 contains a pigment, the illumination can be colored in a desired color, so that it can be adapted to the surrounding environment and the beauty can be enhanced.

  The reflection means 130 is configured by a reflection sheet, and is installed on the arcuate outer end surface of the light guide plate 110. The reflection sheet is composed of a laminate film obtained by laminating an aluminum foil and a resin film. The laminate film is formed so that the resin film sandwiches the aluminum foil from both sides, and is configured to block the aluminum foil from the outside air. Of the two-layer resin film, at least the resin film located on the light guide plate 110 side is formed of a transparent resin film. The reflecting means 130 is bonded to the light guide plate 110 with an adhesive having a lower optical refractive index than the light guide plate 110.

  Note that the aluminum foil may be replaced with other materials as long as it has a mirror surface even if it is another metal. Further, instead of the laminate tube, a foamed PET (polyethylene terephthalate) sheet or a foamed polycarbonate sheet made of foamed resin (foamed plastic) may be adopted as the reflecting means 130. The diameter of the foam formed at this time is about several μm, but the higher the density of the foam, the higher the reflectance. Since the foamed PET sheet or the foamed polycarbonate sheet has a light reflectance higher than that of the laminate film, light loss inside the light guide plate 110 can be suppressed.

  The solar panel 140 may be configured by a known solar panel, but in the present embodiment, for example, a thin film solar cell is provided with a light transmissive back sheet. The solar panel 140 is in the form of a film and has appropriate flexibility, and is a flexible panel that can follow the surface shape of the light guide plate 110. As the thin film solar cell, for example, a thin film silicon solar cell is used. A thin-film silicon solar cell is formed by forming a thin film of several μm made of amorphous silicon (a-Si: H), microcrystalline silicon (μc-Si: H), etc. on a flexible substrate. It is formed in a single large area. The thin film is formed by a CVD (chemical vapor deposition) method or the like. The thin-film solar battery cell has a lower power generation efficiency than a conventional crystal wafer-type solar power generation cell, but the power generation amount is ensured by forming it in a large area. The thin film solar cell of this embodiment is a solar cell in which a thin film is formed on both surfaces of a substrate and light can be received by receiving light on both surfaces.

  In this embodiment, a thin film solar cell formed by forming a thin film with a thickness of several μm on the entire surface of the substrate is used, but the present invention is not limited to this. For example, pc-Si type (polycrystalline Si type) solar cells having a thickness of 150 to 300 μm may be arranged on the substrate with a predetermined gap.

  In order to protect the thin film, the back sheet (not shown) is provided so as to cover the surface of the thin-film solar cell. In this embodiment, the back-sheet (not shown) is provided so as to cover the upper and lower surfaces of the thin-film solar cell. Has been. The back sheet transmits at least part of sunlight. Specifically, the back sheet has a three-layer structure, and the outermost layer is a film or sheet material (fluorine resin film, fluororesin coating film, heat-resistant low oligomer, PET film, etc.) excellent in weather resistance. Configured. The intermediate layer is configured by installing a light-transmitting vapor-deposited PET film having excellent water vapor barrier properties. The innermost layer is composed of an electrically insulating PET film excellent in heat resistance, moisture resistance, electric resistance and the like.

  The solar panel 140 having the above configuration is inserted and accommodated in the inner space of the light guide plate 110 and is sandwiched and fixed between the upper plate portion 111 and the lower plate portion 113. The solar panel 140 may be adhered to the lower surface of the upper plate portion 111 or the upper surface of the lower plate portion 113.

The battery is electrically connected to the solar panel 140 and the light source 150 for illumination, and is accommodated in, for example, the column member 104 or the beam member 105. Note that the battery housing position is not limited to this, and may be another place as long as it is not exposed to wind and rain such as the lower side of the roof 103. The battery is composed of, for example, an alkaline storage battery, a nickel hydride storage battery, a lithium ion battery, or the like. The battery is not limited to the above-described battery, and may be any storage battery as long as it is a small, light, and high-performance rechargeable battery. Among these, a lithium ion battery is particularly preferable because of its high energy density. Generally, LiCoO ₂ is used for the positive electrode, C is used for the negative electrode, and an organic electrolyte containing Li ions such as LiClO ₄ and LiPF ₆ is used for the electrolyte as the separator. Here, Li ions can enter and leave the crystal of the positive electrode and negative electrode materials, and can be charged and discharged. In the Li ion battery, Li ions move from the positive electrode to the negative electrode through the separator during charging, and conversely, Li ions move from the negative electrode to the positive electrode during discharging.

  The illumination light source 150 is composed of a light emitting diode. The light emitting diode may be of any type as long as it utilizes a light emitting element that emits visible light or ultraviolet light by recombination of electrons and holes. As the light emitting element, for example, any of red, green, and blue light emitting diodes may be used, or white light may be emitted by combining these three color light emitting diodes. If a blue diode is used, the viewer's emotion can be cooled down to give a calm impression.

  In the present embodiment, the light emitting diode includes a light emitting element in which at least a light emitting layer is a nitride semiconductor, and an inorganic phosphor that emits fluorescence by absorbing at least a part of light emitted from the light emitting element and converting the wavelength. I have it. Specifically, an ultraviolet LED light emitting element that can emit light at 350 nm to 390 nm as the main peak of the emission spectrum is used. In this case, the light emitting layer is provided with a low-temperature buffer layer such as AlN on a sapphire substrate, for example, by metal organic chemical vapor deposition (MOCVD), and an AlGaN thick film, an AlGaN-based n-type nitride semiconductor, and the like. A p-type nitride semiconductor thin film is formed, and an InAlGaN light emitting layer is formed as a cladding layer. Of course, various emission wavelengths can be selected depending on the material used for the semiconductor layer and its composition.

Examples of the inorganic phosphor that emits white light include 3Ca ₃ (PO ₄ ) ₂ .Ca (F, Cl) ₂ : Sb. In addition, a mixed phosphor that emits white light and is composed of a phosphor mixture of blue, green, and red light emission. When these fluorescent materials are used, they may be formed by mixing an appropriate amount of these fluorescent materials in a light-transmitting inorganic member such as glass or a light-transmitting organic member such as resin. Further, after applying a mixture of the fluorescent material, the organic binder, and the solvent to the inner wall or the outer wall of glass or the like, it may be heated to decompose and gasify only the binder and the solvent. With such a light emitting device, bright illumination can be obtained by efficiently converting the ultraviolet rays emitted from the light emitting diodes into white light by the inorganic phosphor.

  As shown in FIG. 7, the illumination light source 150 is inserted into the light source hole 114 formed in the connecting portion 112 of the light guide plate 110 and is built in the light guide plate 110. The light source hole 114 extends from the outer end surface of the light guide plate 110 toward the lower plate portion 113 at a side position of the lower plate portion 113, and its front end surface (bottom surface) faces the lower plate portion 113. Is formed. The light source hole 114 is formed in a circular shape in cross section, and its opening is covered with a reflection sheet as the reflection means 130. A plurality of light source holes 114 are formed at predetermined intervals along the longitudinal direction of the outer end face of the light guide plate 110.

  As shown in FIG. 9, a reflector 151 is provided around the light emitting diode (illumination light source 150) to direct the traveling direction of the emitted light in the forward direction (the lower plate portion 113 side direction). The reflector 151 is formed by pressing an aluminum plate or an aluminum alloy plate excellent in thermal shock resistance, and its surface (illuminated surface) is polished by CMP (Chemical Mechanical Polishing). As a result, the surface roughness is reduced. The reflector 151 is formed in an umbrella shape so as to cover the light emitting part at the tip of the light emitting diode, and reflects light irradiated backward from the light emitting diode in the front direction of the light emitting diode. The reflector 151 is not limited to aluminum or aluminum alloy. For example, a glass reflector in which a metal such as aluminum is deposited on the surface of a glass plate may be used.

  Behind the reflector 151, a base portion 152 for fixing the body portion of the light emitting diode is provided. The base portion 152 is made of, for example, a resin and has a cylindrical shape. A male screw portion 153 is formed in the body portion of the light emitting diode, and a screw hole 154 is formed in the inner peripheral surface of the base portion 152. The axial position of the light emitting diode (illumination light source 150) can be adjusted by screwing the male screw portion 153 into the screw hole 154. The light source 150 for illumination is fixed to the light guide plate 110 by fitting and inserting the base portion 152 to which the light source for illumination 150 is attached into the light source hole 114. As described above, the orientation and the axial direction of the illumination light source 150 can be accurately positioned by a simple operation such as fitting the base portion 152 into the light source hole 114.

  The illumination light source 150 is provided in each of the pair of connecting portions 112 and 112 and is configured to face each other. As shown in FIG. 9, the reflecting means 130 is provided behind each illumination light source 150, and the reflecting means 130 is provided on the end face facing the end face on the side where the illumination light source 150 is disposed. It will be. As a result, the light to be emitted to the outside from the end face of the light guide plate 110 can be reflected inward and returned to the inside of the light guide plate 110, and the light from the illumination light source 150 can be efficiently discarded. Can be used. Further, if the reflecting means 130 is provided not only on the outer end face of the connecting portion 112 but also on the entire end face of the light guide plate 110, the light incident on the lower plate portion 113 does not escape from the end face, It can be used even more efficiently.

  As shown in FIGS. 7 and 8, a diffusion sheet 120 is provided on the lower surface of the lower plate portion 113 of the light guide plate 110 to diffuse light and emit it downward. The diffusion sheet 120 is attached so as to cover the entire lower surface of the lower plate portion 113 and the lower surface of the inner portion 112a of the connecting portion 112. The diffusion sheet 120 is formed by unevenly mixing a resin having a high optical transparency such as polyethylene terephthalate (PET) or polycarbonate and a resin having a refractive index different from that of the resin. The diffusion sheet 120 may be a mat type sheet in which unevenness is formed on one surface (lower surface).

  Next, the operation of the lighting device 101 and the roof structure 102 with the lighting device will be described with reference to FIGS. 6 to 9 as appropriate.

  According to the lighting device 101 and the roof structure 102 with the lighting device, part of sunlight transmitted through the light-transmitting plate material 103a constituting the roof 103 is transmitted through the upper plate portion 111 of the light guide plate 110 in the daytime. Then, the solar panel 140 is irradiated. At this time, sunlight is blocked by the solar panel 140, but a part of the sunlight can be circulated below the solar panel 140 via the light guide plate 110, so that the lower part of the roof 103 can be brightened and an open feeling can be obtained. Can do.

  Specifically, as illustrated in FIG. 8A, sunlight irradiated on the upper plate portion 111 of the light guide plate 110 is incident on the upper plate portion 111 and connected while being repeatedly reflected therein. Proceed to section 112 and further transmitted to lower plate section 113. At this time, on the outer end face of the connecting part 112, sunlight often hits the surface at an angle larger than the total reflection critical angle, but since the reflecting means 130 is installed on the outer end face, all light is reflected inward. And loss of light transmission can be prevented. In the lower plate portion 113, part of sunlight is reflected, and the other portion is emitted from the surface, so that the entire surface of the lower plate portion 113 becomes an illumination surface. Thereby, the lower part of the roof 103 can be brightened.

  Here, since at least the lower plate portion 113 of the light guide plate 110 contains a phosphor, the near-ultraviolet rays and visible rays are irradiated on the phosphor in the light guide plate 110 to emit fluorescence. The illuminance of the light plate 110 is increased. Further, when the light guide plate 110 contains a pigment instead of the phosphor, the illumination can be colored in a desired color, so that it can be adapted to the surrounding environment and the aesthetics can be enhanced.

  Further, in the present embodiment, the reflecting means 130 is configured by installing the reflecting sheet on the outer end surface of the light guide plate 110. Therefore, the reflecting means 130 can be formed only by pasting the reflecting sheet on the end surface of the light guide plate 110. The manufacturing process becomes easy. Furthermore, since the reflective sheet is composed of a laminated film made by laminating an aluminum foil and a resin film, the light reflectance can be increased by the aluminum foil, and the aluminum foil can be blocked from the outside air by the resin film. Therefore, corrosion of the aluminum foil can be prevented, and a decrease in light reflectance can be suppressed.

  On the other hand, according to the illuminating device 101 of the present embodiment, a part of sunlight transmitted through the light transmissive plate material 103a is transmitted through the upper plate portion 111 of the light guide plate 110 and irradiated to the solar panel 140. Panel 140 can convert solar energy into electrical energy and store it in the battery. Further, the solar panel 140 can generate light by receiving light on both sides, and part of the sunlight transmitted to the lower plate portion 113 through the light guide plate 110 is emitted upward from the upper surface of the lower plate portion 113. Since the solar panel 140 is irradiated on the lower surface, power can be generated by the solar panel 140 and stored in the battery.

  In this embodiment, since the solar panel 140 is inserted into the inner space of the flat cylindrical light guide plate 110 and sandwiched between the upper plate portion 111 and the lower plate portion 113, the solar panel 140 is The lighting device 101 can be efficiently manufactured because the structure can be simplified and the structure can be simplified. On the other hand, since the solar panel 140 is configured to include a thin-film solar battery cell made of a thin-film silicon photovoltaic cell capable of transmitting light, the thin-film solar battery cell can be laid on the entire solar panel 140. And a large light receiving area can be secured. Moreover, since the thin film solar cell is in the form of a film and is composed of a flexible panel capable of following the surface shape of the roof 103 and the light guide plate 110, it can be provided following the roof 103 having a shape other than the flat plate shape. It is possible to increase the degree of freedom in designing the roof shape.

  As described above, the solar panel 140 converts solar energy into electric energy and stores it in the battery, so that the illumination light source 150 can provide comfortable illumination even at night.

  Specifically, as illustrated in FIG. 8B, light from the illumination light source 150 is incident from the bottom surface of the light source hole 114 toward the lower plate portion 113. Here, since the illumination light source 150 is composed of a light emitting diode, it is possible to obtain bright illumination with a small amount of power consumption, and the illumination light source 150 can be reduced in size and the light guide plate 110 can be reduced in thickness. Contributing. Thereby, a light impression can be given to the person who sees the lighting device 101. Furthermore, since the light emitting diode is attached to the base portion 152 and inserted and fixed in the light source hole 114 of the connecting portion 112 of the light guide plate 110, fixing and positioning operations can be easily performed.

  In addition, since the reflector 151 is provided around the light emitting diode, light from the light emitting diode is reflected forward. Therefore, the light from the light emitting diode can be efficiently used without being wasted. Furthermore, since the illumination light source 150 includes a male screw portion 153 and is screwed into a screw hole 154 formed in the base portion 152, the position in the axial direction can be easily adjusted.

  The light incident on the lower plate portion 113 of the light guide plate 110 from the bottom surface of the light source hole 114 proceeds to the other end surface while repeating total reflection between the upper surface and the lower surface of the lower plate portion 113. On the way, according to Snell's law, the light emitted toward the lower surface is emitted from the lower surface to the lower outside of the lower plate portion 113 when the incident angle to the lower surface is larger than the critical angle of total reflection, When the incident angle is smaller than the critical angle of total reflection, the incident angle is reflected upward on the lower surface and returns to the inside of the lower plate portion 113. Since the light incident on the lower plate portion 113 is irradiated onto the phosphor contained therein and emits fluorescence, the illuminance on the illumination surface is increased. Furthermore, when the light guide plate 110 contains a pigment, the roof surface emits light in a desired color, and the beauty can be enhanced.

  On the other hand, light emitted from the upper surface of the lower plate 113 at an incident angle larger than the critical angle of total reflection is irradiated from the upper surface to the lower surface of the solar panel 140. Here, the solar panel 140 is a solar battery cell in which the thin film of the thin film solar cell is formed on both surfaces of the substrate and can generate light by receiving light on both surfaces. It is possible to generate electricity using light. Of the light energy radiated upward from the lower plate 113, depending on the peak wavelength of light emitted from the light emitting diode used as the illumination light source 150, the type of semiconductor used in the thin film solar cell, etc. About 5% of energy can be recovered as electric energy, and loss of light can be reduced.

  Since the diffusion sheet 120 is laid on the lower surface of the lower plate portion 113 of the light guide plate 110, the light emitted from the lower surface of the lower plate portion 113 of the light guide plate 110 is diffused and emitted downward. Thus, unevenness in brightness can be eliminated, the illuminance can be made uniform, and illumination with stable illuminance can be obtained.

  In the present embodiment, a light-transmissive back sheet that transmits at least part of sunlight is laid on both sides of the solar panel 140, and a light that can be received and generated on both sides is adopted. It is not limited to. The back sheet on the lower surface may be made of aluminum foil. In this case, although light cannot be received from the lower surface, all of the light incident on the lower plate portion 113 is emitted from the lower surface, so that the illuminance at the lower plate portion 113 can be increased.

  In the present embodiment, the illumination light source 150 is provided in the vicinity of the outer peripheral end surface of the connecting portion 112 of the light guide plate 110, but is not limited thereto. As shown in FIG. 10, an illumination light source 150 may be provided on an end surface 115 where an inner space of the light guide plate 110 having a flat cylindrical body opens. A plurality of light source holes 114 are formed in the lower plate portion 113 of the end face 115, and an illumination light source 150 attached to the base portion 152 (see FIG. 9) is inserted therein. The light source hole 114 extends from one end surface 115 of the lower plate portion 113 toward the inside of the lower plate portion 113, and has a tip surface (bottom surface) facing the other end surface 115. . A reflection sheet as the reflection means 130 is laid on the end surfaces 115 and 115 on both sides, and the opening of the light source hole 114 is covered with the reflection sheet. A plurality of light source holes 114 are formed at predetermined intervals along the longitudinal direction of the end surface 115 of the light guide plate 110.

  According to such a configuration, it is possible to obtain the same operational effects as the illumination device 101 shown in FIG. In this modified example, the end surfaces 115 and 115 are parallel to each other. Therefore, when the light emitted from one end surface 115 strikes the other end surface 115, it is not reflected to the upper plate portion 111 side and is not reflected to the lower plate portion 113. Therefore, it is possible to prevent light loss and increase the illuminance. In the daytime, similarly to the lighting device 101 in FIG. 7, sunlight is transmitted from the upper plate portion 111 to the lower plate portion 113 through the connecting portion 112.

  Next, the case where the illuminating device 101 which concerns on this embodiment is attached to the roof structure of a fence is demonstrated, referring FIG. 11 and FIG.

  As shown in FIGS. 11 and 12, the ridge 160 is attached to the entrance or the like, and is formed of, for example, an aluminum honeycomb panel and is a member that does not transmit light. The honeycomb panel is a sandwich panel in which surface materials 162 and 162 are provided above and below a core material 161 (see FIG. 12). The lighting device 101 is formed to have a thickness dimension equivalent to that of the core material 161. The illuminating device 101 is built in the ridge 160 and is provided so as to be exposed vertically from the opening 163 of the surface material 162 provided at an appropriate position in the middle of the ridge 160. The illuminating device 101 is fixed to the collar 160 by connecting the peripheral edge portion thereof to the core material 161 or the upper and lower surface materials 162 and 162. Although not shown, the battery is separately provided at a position where it is not exposed to wind and rain, such as inside the tub 160 or under the tub.

  As described above, when the lighting device 101 is attached to the ridge 160, even if the ridge 160 does not transmit light, a part of sunlight is transmitted from the upper plate portion 111 of the light guide plate 110 through the connecting portion 112 to the lower plate. Since it is transmitted to the part 113 and irradiated downward, the lower part of the heel 160 can be brightened, and a feeling of opening can be obtained.

  Moreover, since a part of sunlight passes through the upper plate portion 111 and is irradiated to the solar panel 140, the solar panel 140 can convert solar energy into electric energy and store it in the battery. A comfortable illumination can be obtained even at night by an illumination light source (not shown in FIG. 12).

  The installation position of the lighting device 101 configured as described above is not limited to the roof or the fence. For example, you may install in the wall surface of show windows, such as a store. In this case, an illumination light source is provided on the light receiving surface side of the solar panel. According to such a configuration, it is possible to illuminate the show window by generating electricity with a solar panel in the daytime and storing it in the battery and turning on the illumination light source at night.

(Third embodiment)
Next, the structure of the illuminating device which concerns on 3rd embodiment is demonstrated.

  The illuminating device 201 according to the third embodiment is fixed so as to abut on the lower surface of the light-transmitting plate material constituting the light-transmitting roof, similarly to the illuminating device 101 according to the second embodiment.

  As shown in FIG. 13 and FIG. 14, the lighting device 201 is opposed to the light guide plate 210 configured to cover the end portion from the upper portion of the light shielding portion to the lower portion, and the end portion of the light shielding portion. The reflection means 230 is provided on the outer end surface of the light guide plate 210. As in the second embodiment, the light guide plate 210 is made of, for example, a light-transmitting resin plate such as polymethyl methacrylate, polycarbonate, polystyrene, or acrylic. This light-transmitting resin plate has a low light transmittance as compared with a glass plate, but can sufficiently ensure the transmittance as the light guide plate 210. Further, since the light-transmitting resin plate has high strength and is lightweight, it can cope with an increase in the area of the light guide plate 210. In the present embodiment, the light guide plate 210 is made of a light transmissive resin plate. However, the present invention is not limited to this, and the light guide plate 210 may be made of a light transmissive glass plate.

  The light shielding unit is configured by a solar panel 240 that converts solar energy into electric energy, and a light guide plate 210 is provided so as to surround the solar panel 240. That is, the illuminating device 201 has a solar panel 240 serving as a light shielding part built in the light guide plate 210, and further, a battery (not shown) that stores electrical energy converted by the solar panel 240, and an illumination light source 250. And further.

  The light guide plate 210 includes an upper plate portion 211 covering the upper surface of the solar panel 240, a lower plate portion 213 covering the lower surface of the solar panel 240, an end portion of the solar panel 240, and an upper plate portion 211 and a lower plate portion 213. And a connecting portion 212 that connects the two. In the present embodiment, the light guide plate 210 includes an upper light guide plate 210a and a lower light guide plate 210b that have a larger area than the solar panel 240 and are disposed so as to sandwich the solar panel 240 from above and below. A part of the upper light guide plate 210a (a part covering the solar panel 240 on the center side) constitutes the upper plate part 211, and a part of the lower light guide plate 210b (a part covering the solar panel 240 on the center side). While constituting the lower plate portion 213, the portion that protrudes outward from the planar position of the solar panel 240 and the portion where the upper light guide plate 210a and the lower light guide plate 210b abut (the upper light guide plate 210a and the lower light guide plate 210b Both end portions) constitute the connecting portion 212.

  The upper light guide plate 210a is formed in a plate shape having a trapezoidal shape with a short upper side and a long lower side, and the lower light guide plate 210b is formed in a plate shape having a cross-sectional trapezoidal shape with a long upper side and a short lower side. The lower surface of the upper light guide plate 210a and the upper surface of the lower light guide plate 210b are formed in the same shape and are in contact with each other. The hypotenuses on both sides of the trapezoidal cross section of the upper light guide plate 210a and the hypotenuses on both sides of the trapezoidal cross section of the lower light guide plate 210b are symmetrical in the vertical and horizontal directions, and the lower surface of the upper light guide plate 210a (the lower light guide plate 210b The inclination angle with respect to the upper surface is preferably in the range of 40 to 45 degrees. As a result, the outer end surface of the connecting portion 212 of the light guide plate 210 has a horizontal V shape whose cross section protrudes outward.

  In the present embodiment, the upper light guide plate 210a and the lower light guide plate 210b are formed in a flat plate shape. However, the present invention is not limited to this, and the light transmissive plate material of the roof is curved. Is formed in a curved shape according to its radius of curvature.

  A recess 214 for accommodating the solar panel 240 is formed on the lower surface of the upper light guide plate 210a (the surface on the lower light guide plate 210b side). The recess 214 is formed in a rectangular plane shape with a peripheral wall perpendicular to the lower surface, and has a plane area equivalent to that of the solar panel 240. Further, the recess 214 has a depth (height) that can accommodate the solar panel 240 and a prism sheet 215 described later.

  The upper light guide plate 210a and the lower light guide plate 210b are fixed by a resin adhesive having a lower light refractive index than the upper light guide plate 210a and the lower light guide plate 210b. The resin-based adhesive is light-transmitting, and is applied annularly to the peripheral edge of the concave portion 214 of the upper light guide plate 210a to integrally fix the upper light guide plate 210a and the lower light guide plate 210b. As the resin adhesive, an epoxy adhesive, an acrylic adhesive, or the like is used. In addition, you may use the adhesive agent used for an adhesive tape etc.

  A prism sheet 215 is laid on the bottom surface of the recess 214. The prism sheet 215 enhances the light condensing effect on the solar panel 240, and is configured by forming irregularities on the surface of a resinous sheet, for example. The prism sheet 215 has a planar rectangular shape, and is affixed over the entire bottom surface of the recess 214 with a resin adhesive. Accordingly, the prism sheet 215 covers the entire surface of the solar panel 240 inserted into the recess 214. The laying position of the prism sheet 215 is not limited to the bottom surface of the recess 214, and may be the top surface of the upper light guide plate 210a. However, it is preferable to provide it on the bottom surface of the concave portion 214 because it is not exposed to the outside, so that it is protected.

  At least the lower light guide plate 210b (in this embodiment, the entire light guide plate 210 including the upper light guide plate 210a) of the light guide plate 210 contains a phosphor (equivalent to the second embodiment) therein. Further, the light guide plate 210 may contain a pigment instead of the phosphor.

  The reflection means 230 is composed of a reflection sheet, and is installed on the outer end face of the light guide plate 210 having a horizontal V shape. Similar to the second embodiment, the reflection sheet is composed of a laminate film obtained by laminating an aluminum foil and a resin film. Also in the present embodiment, the aluminum foil may be replaced with other materials as long as it has a mirror surface even if it is another metal. Further, instead of the laminate tube, a foamed PET (polyethylene terephthalate) sheet or a foamed polycarbonate sheet made of foamed resin (foamed plastic) may be adopted as the reflecting means 130.

  The solar panel 240 may be configured by a known solar panel, but in the present embodiment, for example, a thin-film solar cell is provided with a light-transmissive back sheet (as in the second embodiment). same product). The solar panel 240 is in the form of a film and has appropriate flexibility, and is a flexible panel that can follow the surface shape of the light guide plate 210. The thin film solar cell is a solar cell in which a thin film is formed on both surfaces of a substrate and can generate light by receiving light on both surfaces.

  The solar panel 240 configured as described above is housed in the concave portion 214 of the upper light guide plate 210a together with the prism sheet 215, and is sandwiched and fixed between the upper light guide plate 210a and the lower light guide plate 210b. The solar panel 240 may be bonded to the lower surface of the upper light guide plate 210a or the upper surface of the lower light guide plate 210b integrally with the prism sheet 215.

  The battery is electrically connected to the solar panel 240 and the illumination light source 250, and is accommodated in, for example, a pillar material. Note that the battery housing position is not limited to this, and may be another place as long as it is not exposed to wind and rain, such as under the roof. The battery is configured in the same manner as in the second embodiment.

  As shown in FIG. 15, the illumination light source 250 is configured by a light emitting diode, as in the second embodiment. The light emitting diode may be of any type as long as it utilizes a light emitting element that emits visible light or ultraviolet light by recombination of electrons and holes. As the light emitting element, for example, any of red, green, and blue light emitting diodes may be used, or white light may be emitted by combining these three color light emitting diodes.

  As shown in FIG. 14B, the illumination light source 250 is inserted into the light source hole 216 formed in the connecting portion 212 at the end of the upper light guide plate 210 a and is built in the light guide plate 210. . The light source hole 216 extends from the upper side of the outer end surface to the lower side at a side position of the upper light guide plate 210a, and the tip surface (bottom surface) thereof faces the inclined surface of the outer end surface of the lower light guide plate 210b. Is formed. The light source hole 216 is formed in a circular shape in cross section, and its opening is covered with a reflection sheet as the reflection means 230. A plurality of light source holes 216 are formed at predetermined intervals along the longitudinal direction of the outer end face of the light guide plate 210.

  As shown in FIGS. 14 and 15, a reflector 251 is provided around the light emitting diode (illumination light source 250) to direct the traveling direction of the emitted light downward and outward (the inclined surface side of the upper light guide plate 210a). It has been. The reflector 251 is integrally formed with a base portion 252 that fixes a body portion of the light emitting diode. The base portion 252 is formed in a columnar shape, and a reflector 251 having an arcuate cross section, in which a part of the cylindrical shape is cut out, is integrally formed at a lower portion thereof. The outer diameters of the reflector 251 and the base portion 252 have the same dimensions as the inner diameter of the light source hole 216. The reflector 251 and the base portion 252 are made of an aluminum plate or an aluminum alloy plate excellent in thermal shock resistance, and the surface (illumination surface) is polished by CMP (Chemical Mechanical Polishing). The surface roughness is small and the reflectivity is high. Further, the outer peripheral surfaces of the reflector 251 and the base portion 252 are also polished to reduce the surface roughness, and the reflectance is high. A screw hole 254 (see FIG. 15) is formed in the inner peripheral surface of the base portion 252, and a male screw portion 253 (see FIG. 15) formed in the body portion of the light emitting diode is screwed together. The axial position of the light-emitting diode (illumination light source 250) can be adjusted by screwing the male screw portion 253 into the screw hole 254. The illumination light source 250 is fixed to the light guide plate 210 by fitting and inserting the base portion 252 and the reflector 251 to which the illumination light source 250 is attached into the light source hole 216. At this time, the notch 251a of the reflector 251 is disposed and inserted so as to face the reflecting means 230 provided on the inclined surface of the upper light guide plate 210a. As described above, the orientation and the axial direction of the illumination light source 250 can be accurately positioned by a simple operation of fitting and inserting the base portion 252 and the reflector 251 into the light source hole 216.

  The illumination light source 250 is provided in each of the pair of connecting portions 212 and 212 (see FIG. 13). With the illumination light source 250 installed on the light guide plate 210, the reflecting means 230 provided on the inclined surface of the lower light guide plate 210b is positioned in front of the light emitting diode, and the notch 251a of the reflector 251 is connected to the upper light guide. Reflecting means 230 provided on the inclined surface of the optical plate 210a is located. As a result, the light to be emitted from the light emitting diode to the periphery is emitted by the reflector 251 toward the reflecting means 230 provided on the inclined surface of the upper light guide plate 210a, and is reflected downward by the reflecting means 230. The light is reflected toward the center of the lower light guide plate 210b by the reflecting means 230 provided on the inclined surface of the lower light guide plate 210b. On the other hand, the light emitted forward from the light emitting diode is reflected toward the center of the lower light guide plate 210b by the reflecting means 230 provided on the inclined surface of the lower light guide plate 210b. As described above, by providing the reflector 251, the light from the illumination light source 250 can be efficiently reflected toward the center side of the lower light guide plate 210b without being wasted. Further, if the reflecting means 230 is provided not only on the outer end face of the connecting portion 212 but also on the entire circumference of the end face of the light guide plate 210, the light incident on the lower light guide plate 210b does not escape from the end face, It can be used even more efficiently.

  As shown in FIG. 14, a diffusion sheet 220 that diffuses light and emits it downward is laid on the lower surface of the lower light guide plate 210b. The diffusion sheet 220 is the same as that of the second embodiment, and is attached so as to cover the entire lower surface of the lower light guide plate 210b.

  Next, the operation of the lighting device 201 and the roof structure with lighting device (not shown) having the above-described configuration will be described.

  According to the lighting device 201, in the daytime, a part of sunlight transmitted through the light-transmitting plate material constituting the roof is transmitted through the upper light guide plate 210 a of the light guide plate 210 and irradiated to the solar panel 240. At this time, sunlight is blocked by the solar panel 240, but as in the second embodiment, a part of the sunlight is circulated below the solar panel 240 through the light guide plate 210 to brighten the lower part of the roof. And a sense of openness can be obtained.

  On the other hand, according to the illuminating device 201 of the present embodiment, a part of sunlight transmitted through the upper light guide plate 210a is irradiated to the solar panel 240. Therefore, the solar panel 240 converts solar energy into electric energy and the battery. Can be charged. Therefore, comfortable illumination can be obtained by the illumination light source 250 even at night.

  In this embodiment, since the light guide plate 210 is composed of the upper light guide plate 210a and the lower light guide plate 210b, the installation of the solar panel 240 is sandwiched between the upper light guide plate 210a and the lower light guide plate 210b, and the upper light guide plate 210a. It is only necessary to bond the lower light guide plate 210b. Therefore. The structure of the lighting device 201 is simplified, and the manufacturing can be performed efficiently.

  According to the illuminating device 201, the effect similar to the illuminating device of 2nd embodiment can be acquired otherwise.

  Next, a modification of the lighting device according to the third embodiment will be described.

In the first modification, as shown in FIG. 16A, the second reflecting means 217 for partially reflecting the light in the lower light guide plate 210b is provided on the upper surface of the lower light guide plate 210b. In the first modification, the second reflecting means 217 is configured by a transflective reflective dot sheet, and is attached to the upper surface of the lower light guide plate 210b. The reflective dot sheet is a resin sheet such as polyethylene terephthalate (PET) or polycarbonate, and has no optical absorption such as titanium white (TiO ₂ ) or precipitated barium sulfate (BaSO ₄ ) as a base material. It is manufactured by applying a reflective ink 217a obtained by kneading a high pigment and a resin binder by a screen printing method. The semi-transmissive reflective dot sheet becomes a semi-transmissive type by reflecting / refracting light (partially transmitted) at a portion where the reflective ink 217a is applied and transmitting light at a portion where the reflective ink 217a is not applied. .

  The reflective ink 217a is applied according to a unique gradation pattern. Specifically, the reflective ink 217 a is applied so as to be along the radiation direction of the light from the illumination light source 250, the portion close to the illumination light source 250 is small, and increases as the distance from the illumination light source 250 increases. By the way, since the illumination light source 250 is provided on both sides of the light guide plate 210, the reflective ink 217a is applied so as to enlarge the middle portion, and the amount of reflection is uniform when seen in plan view of the lower light guide plate 210b. It is configured as follows. Since the transflective reflective dot sheet is affixed to the upper surface of the lower light guide plate 210b, an adhesive is applied to the surface opposite to the surface on which the reflective ink 217a is printed. That is, the transflective reflective dot sheet is arranged so that the surface on which the reflective ink 217a is printed is on the upper side, and the adhesive is applied to the lower surface thereof. As the adhesive, an epoxy adhesive, an acrylic adhesive, or the like is used. In addition, you may use the adhesive agent used for an adhesive tape etc.

  Since other configurations are the same as those of the third embodiment, the same reference numerals are given and description thereof is omitted.

  According to such a configuration, the light reflected from the end surface of the lower light guide plate 210b to the other end surface proceeds while repeating total reflection between the upper surface and the lower surface of the lower light guide plate 210b. On the way, the incident light hits the reflecting dots formed by the reflecting ink 217a of the reflecting dot sheet as the second reflecting means 217, is irregularly reflected in the reflecting dots, and the lower surface (illumination surface) of the lower light guide plate 210b. Or it radiates | emits toward the opposite direction (upper surface). According to Snell's law, the light emitted toward the lower surface is emitted from the lower surface to the lower outside of the lower light guide plate 210b when the incident angle on the lower surface is larger than the critical angle of total reflection. When it is smaller than the critical angle of total reflection, it is reflected upward on the lower surface and returns to the inside of the lower light guide plate 210b. At this time, since the reflective ink 217a is applied in accordance with a gradation pattern corresponding to the arrangement of the light emitting diodes, light can be reflected efficiently and illuminance can be increased. In addition, since the light incident on the lower light guide plate 210b is emitted to the phosphor contained therein and emits fluorescence, the illuminance of the illumination surface formed by the lower light guide plate 210b is increased. Furthermore, when the lower light guide plate 210b contains a pigment, the illumination surface emits light in a desired color, and the beauty can be enhanced.

  On the other hand, the light emitted to the portion where there is no reflective dot on the upper surface of the lower light guide plate 210b is emitted from the upper surface to the upper part of the lower light guide plate 210b when the incident angle on the upper surface is larger than the critical angle of total reflection. . Here, the solar panel 240 is a solar cell in which the thin film of the thin-film solar cell is formed on both surfaces of the substrate and can receive light on both surfaces and generate electric power. Therefore, the solar panel 240 is radiated from the lower light guide plate 210b. It is possible to generate electricity using light. Here, depending on the peak wavelength of light emitted from the light emitting diode used as the illumination light source 250, the type of semiconductor used in the thin film solar cell, etc., the light is emitted from the lower light guide plate 210b to the outside. About 5% of the light energy can be recovered as electric energy, and light loss can be reduced.

In the second modification, a semi-transmissive reflective dot sheet is used as the second reflecting means 217, but is not limited to this. For example, as shown in FIG. 16B, the reflective ink 217b may be directly printed on the upper surface of the lower light guide plate 210b to form reflective dots, which may be used as the reflective means (third modification). In this case, the reflective ink 217b is obtained by kneading a highly reflective pigment and a resin binder on the upper surface of the lower light guide plate 210b, such as titanium white (TiO ₂ ) or precipitated barium sulfate (BaSO ₄ ), which is not optically absorbed. The reflective ink 217b is applied by a screen printing method. The shape of the reflective dots is applied according to the same gradation pattern as that of the transflective reflective dot sheet.

  Further, as shown in FIG. 16C, the second reflecting means 217 may be constituted by a reflecting groove 218 formed on the upper surface of the lower light guide plate 210b (fourth modification). For example, a plurality of reflection grooves 218 having a V-shaped cross section are formed, and are integrally formed by convex portions processed into a mold when the lower light guide plate 210b is injection molded. Further, the reflection groove 218 may be formed on the surface of the lower light guide plate 210b by cutting or the like. According to such a configuration, since the light incident on the reflection groove 218 is reflected downward or emitted upward depending on the incident angle, the second reflecting means 217 is a semi-transmissive type.

  According to the configuration of the third modification and the fourth modification as described above, it is possible to generate power using the light emitted from the lower light guide plate 210b on the lower surface of the solar panel 240, as in the second modification. Is possible.

  Next, a further modification of the lighting device according to the third embodiment will be described.

  In the third embodiment described above, the concave portion 214 is formed in the upper light guide plate 210a to accommodate the solar panel 240 and the like. However, the present invention is not limited to this, and as shown in FIG. A recess 219 for accommodating the solar panel 240 or the like may be formed on the upper surface of 210b. Since other configurations are the same as those of the third embodiment, the same reference numerals are given and description thereof is omitted. Even with such a configuration, the same effects as those of the third embodiment can be obtained.

  Further, although not shown, the concave portions may be formed on both surfaces of the lower surface of the upper light guide plate 210a and the upper surface of the lower light guide plate 210b. In this case, the depths of the upper and lower recesses are adjusted so as to have the same thickness as the accommodated item accommodated inside the solar panel 240 or the like.

  Furthermore, in the above-described third embodiment, the outer end portion of the light guide plate 210 has a horizontal V shape that protrudes outward. However, the present invention is not limited to this, and as in this modification, the cross-section arc shape. You may form so that it may become (refer FIG. 17). Even with such a configuration, it is possible to obtain the same functions and effects as those of the third embodiment.

  As mentioned above, although the form for implementing this invention was demonstrated, this invention is not limited to the said embodiment, In the range which does not deviate from the meaning of this invention, a design change is possible suitably. For example, in the said embodiment, although the light-guide plate is comprised with the light transmissive resin plate, it is not restricted to this, You may form with a glass plate. If the light guide plate is formed of a glass plate, a higher transmittance than that of the light transmissive resin plate can be obtained, so that the illuminance can be increased. Whether to adopt a light-transmitting resin plate or a glass plate is appropriately determined according to required illuminance, structural strength, shape, and the like.

  Further, the frame material and column material constituting the roof structure with a lighting device of the present invention are not limited to those made of aluminum or aluminum alloy, but steel, stainless steel, titanium and copper as long as they have the necessary strength. Of course, other materials such as wood can be applied. However, in consideration of weight, cost, and aesthetics, it is preferable to form the frame member and the column member with aluminum or an aluminum alloy.

  Furthermore, the roof structure with a lighting device according to the present invention is not limited to being used as a carport roof or a fence. For example, it can be used on a waiting space roof, a resting place in a park, a terrace of a house, or the like.

DESCRIPTION OF SYMBOLS 1 Lighting apparatus 2 Roof structure with lighting apparatus 10 Light guide plate 11 Upper plate part 12 Connection part 13 Lower plate part 30 Reflecting means 40 Solar panel 50 Light source for illumination 51 Reflector 101 Lighting apparatus 102 Roof structure body with lighting apparatus 110 Light guide plate 111 Upper plate portion 112 Connecting portion 113 Lower plate portion 120 Diffusion sheet 130 Reflecting means 140 Solar panel 150 Illumination light source 151 Reflector 201 Lighting device 210 Light guide plate 210a Upper light guide plate 210b Lower light guide plate 211 Upper plate portion 212 Connection portion 213 Lower plate portion 214 Concavity 215 Prism sheet 217 Second reflection means 219 Concavity 220 Diffusion sheet 230 Reflection means 240 Solar panel 250 Illumination light source 251 Reflector

Claims (8)

A light guide plate configured to cover the end from the upper part of the light shielding part to the lower part, and
Reflecting means provided on the outer end face of the light guide plate facing the end of the light shielding part,
The light shielding part is composed of a roof,
The light guide plate includes an upper plate portion along the upper surface of the light shielding portion, a lower plate portion along the lower surface of the light shielding portion, and a connecting portion that connects the upper plate portion and the lower plate portion. And
And the said light-guide plate is arrange | positioned so that the front- end | tip part of the said roof may be covered, and it bolts only to the upper surface of the said roof via a flat bracket, and both the said upper board part and the said lower board part are the said. It is fixed to be parallel to the roof,
Sunlight incident on the upper plate portion of the light guide plate is reflected downward by the reflecting means while traveling through the light guide plate, and guided downward so as to wrap around the end portion from above the light shielding portion. And the lower part of the said light-shielding part is comprised so that it may become bright, The whole surface of this lower board part becomes an illumination surface, The illuminating device characterized by the above-mentioned. A light guide plate configured to cover the end from the upper part of the light shielding part to the lower part, and
Reflecting means provided on the outer end face of the light guide plate facing the end of the light shielding part,
The reflection means is configured by installing a reflection sheet on the outer end face of the light guide plate in the manufacturing process of the light guide plate,
Sunlight is reflected downward by the reflecting means while traveling in the light guide plate, and is guided downward so as to wrap around the end portion from above the light shielding portion, and below the light shielding portion. Configured to brighten,
The light guide plate includes an upper plate portion along the upper surface of the light shielding portion, a lower plate portion along the lower surface of the light shielding portion, and a connecting portion that connects the upper plate portion and the lower plate portion. And
The sunlight that has entered the upper plate portion of the light guide plate travels to the lower plate portion while reflecting inside the light guide plate, and the entire surface of the lower plate portion constitutes an illumination surface . The lighting device according to claim 1 , wherein the reflection sheet is configured by a laminate film obtained by laminating an aluminum foil and a resin film. Wherein at least the lower plate portion of the light guide plate, the illumination device according to any one of claims 1 to 3, characterized by containing a phosphor or dye therein. A solar panel that converts solar energy into electrical energy, and battery for storing electric energy converted by the solar panel, an illumination light source, further one of claims 1 to 4, characterized in that it comprises 1 The lighting device according to item. The said solar panel is comprised separately from the said light-guide plate, and is installed in the upper surface of the said roof. The illuminating device of Claim 5 characterized by the above-mentioned. The illumination light source, the illumination apparatus according to claim 5 or claim 6, characterized in that it is constituted by a light emitting diode. The illumination light source may be any of claims 5 to 7, characterized in that along its longitudinal direction to the distal end surface of the lower plate portion of the light guide plate is disposed at a predetermined distance The lighting device according to item 1.

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