JP2009175533A - Lighting system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lighting system that suppresses remarkable visual recognition of a solar battery panel when a translucent plate to be lit to which light is made to come, and improves the utilization factor of the solar battery panel in manufacturing the lighting system. <P>SOLUTION: The translucent display plate (plate to be lit) 15 is attached to a device body 2. A power generation unit 21 is built in the device body 2 so that it faces the back surface of the display plate 15. The unit 21 has the solar battery panel 23 for performing photoelectric conversion. A lighting unit 25 is attached to the device body 2. The unit 25 has a light emitting element 28 that is made to emit light with the electric power of a battery for storing electric power generated by the solar battery panel 23 and radiates light to a side surface 15b between front and back surfaces of the display plate 15. A blindfold member 31 covers the light incident surface of the solar battery panel 23, and is arranged between the panel and the display plate 15. The blindfold member 31 allows transmission of light of a wavelength for making the solar battery panel 23 generate power and suppresses sight through the power generation unit 21 from the display plate 15 side. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention is, for example, a nameplate device that displays the name of a resident and is put up on a doorway or a gate of a house, a post nameplate device that displays a resident's name or the like in a post box, or a signboard, crime prevention, etc. Therefore, the present invention relates to a lighting device used as a light emitting device or the like that starts lighting based on the fact that an approach of an object is detected.

  Conventionally, a solar cell is disposed on the front surface of the device, and an illuminating device that irradiates light downward is disposed above the solar cell and on an upper portion of the device that protrudes forward. A solar cell power type nameplate sign is known in which a sculptured transparent glass plate or transparent resin plate is arranged in front of the battery so as to be parallel to and opposed to the solar cell (see, for example, Patent Document 1). .

In this solar cell power type nameplate signboard, power is generated by the solar cell, and the lighting device emits light by the electric power stored in the storage battery, so that light is irradiated to the end face of the transparent glass plate or transparent resin plate, and this plate is engraved. This makes it possible to improve the nighttime visibility by highlighting the letters and designs.
Utility Model Registration No. 3106136 (Claim 1, paragraphs 0005-0007, FIGS. 1 to 3)

  A glass plate or resin plate with a sculpture that functions as a nameplate is transparent in order to allow light to enter a solar cell disposed facing the back. Therefore, when a person who tries to read the nameplate looks at the engraving of the nameplate, the surface state of the solar cell is easily seen through. Accordingly, there is a problem that the surface condition of the solar cell overlaps with the engraving on the nameplate, and the engraving is difficult to see and the display performance is not good.

  In addition, the solar cell is formed by connecting a predetermined number of photoelectric conversion elements in series and placing them on one side of an insulating substrate, and sealing the entire insulating substrate by embedding it in a synthetic resin that passes the wavelength for photoelectric conversion. Therefore, the surface of the solar cell may be rough due to the manufacturing process, and the color of the surface of the solar cell may be different from a predetermined color. Even if such a solar cell is functionally sufficient, when it is used, the engraving of the nameplate becomes more difficult to see due to the color defect of the surface.

  Similarly, even if the function of the solar cell is sufficient, the shape may be different from the predetermined shape, and even if the solar cell has the predetermined shape, the arrangement may not be properly performed. Even in the case of these shape defects and placement defects, the engraving of the nameplate may be difficult to see because it is seen through from the nameplate side.

  Therefore, in the manufacture of a solar cell power type nameplate signboard, a solar cell having a surface condition defect such as color or a shape defect must be discarded as a defective product in its own appearance inspection. At the same time, in the case of a poor placement of solar cells on the solar cell power type nameplate, there is a case where the placement and replacement of solar cells may be forced, and there is a need for improvement.

  An object of the present invention is to suppress the visibility of a solar cell panel when a light-transmitted illuminated plate on which light is incident is visually observed, and to reduce the utilization rate of the solar cell panel in manufacturing. An object of the present invention is to provide an illumination device that can be improved.

  The invention of claim 1 includes an apparatus main body, a translucent illuminated plate attached to the apparatus main body, and a solar cell panel that performs photoelectric conversion so as to face the back surface of the illuminated plate. A power generation unit built in the apparatus main body and a light emitting element that emits light to the side surface between the front and back surfaces of the illuminated plate while emitting light by the power of the storage battery in which the power generated by the solar cell panel is stored An illumination unit attached to the apparatus main body, and a light incident surface of the solar cell panel that is disposed between the solar cell panel and the illuminated plate so as to cover the light incident surface of the solar cell panel, A blindfold member that allows transmission and suppresses the see-through of the power generation unit from the illuminated plate side.

  According to the first aspect of the present invention, as the light such as sunlight transmitted through the illuminated plate passes through the blind member and enters the solar cell panel of the power generation unit, the solar cell panel generates power, and the power Is stored in the storage battery. When the electric power of the storage battery is supplied to the light emitting element of the lighting unit, the light emitting element emits light, and the light enters the illuminated plate from the side surface of the illuminated plate, and the illuminated plate is illuminated. Therefore, when a display made of a sculpture or the like is given to the illuminated plate, the illuminated plate is used as a nameplate, a signboard, etc., and the display can be highlighted by the light of the light emitting element. When the display is not performed, the surroundings can be illuminated using this illuminated plate as a secondary light source.

  Since the blindfold member included in the invention of claim 1 covers the power generation unit from the light incident side thereof, it functions so that the presence of the power generation unit does not stand out when the illuminated plate is viewed. This makes it difficult to see the power generation unit regardless of whether or not the light emitting element emits light. Therefore, when a display made of engraving or the like is applied to the illuminated plate, the display of the illuminated plate is displayed by the solar cell panel of the power generation unit. It is suppressed that it becomes difficult to see, and the visibility of this display can be improved. At the same time, since the power generation unit is difficult to be visually recognized as described above, if the solar cell panel is functionally sufficient, even if the panel has a surface property defect such as color, the shape is defective. Alternatively, even if the arrangement is poor, it can be used. Therefore, in the illuminating device of this invention, the utilization factor of the solar cell panel used for this is improved, and resource efficiency can be improved.

  The invention of claim 2 is characterized in that, in the invention of claim 1, the blindfold member is formed of a sheet having fine light passage holes over the entire area.

  According to the second aspect of the present invention, since the blindfold member is formed of a sheet having a low material cost, the cost of the entire illumination device including this member can be reduced.

  The invention according to claim 3 is the invention according to claim 2, wherein the blindfold member is held in contact with the back surface of the translucent holding panel, and the blindfold member is in contact with the surface of the solar cell panel. It is characterized by.

  In the invention of claim 3, since the blindfold member made of a sheet can be handled integrally with the holding panel holding the member in assembling the lighting device, it is effective in improving the assembling property of the lighting device. At the same time, since the blindfold member is in contact with the back surface of the holding panel and the surface of the solar cell panel, in a lighting device used outdoors, the fine light passage hole of the blindfold member is clogged with dust. There is nothing. Accordingly, the performance of transmitting light such as sunlight through the blindfold member does not deteriorate over a long period of time, and the power generation performance of the solar cell panel can be maintained.

  A fourth aspect of the invention is characterized in that, in the invention according to any one of the first to third aspects, the illuminated plate is engraved for display.

  In this invention of Claim 4, it is suppressed that the engraving for a display of a translucent to-be-illuminated board is arrange | positioned on the back side of this to-be-illuminated board, and becomes difficult to see with the solar cell panel of an electric power generation unit, and visual recognition of this engraving Therefore, it can be effectively implemented as a display device such as a nameplate device.

  According to the illuminating device of the invention according to claims 1 to 4, the solar cell panel can be suppressed from being conspicuously recognized and manufactured when the translucent illuminated plate on which light is incident is visually observed. There exists an effect that the utilization factor of a solar cell panel can be improved above.

  An embodiment of the present invention will be described with reference to the drawings.

  In FIG. 1 to FIG. 3A, reference numeral 1 denotes an illumination device such as a nameplate device. The nameplate apparatus 1 includes an apparatus main body 2, an illuminated plate such as a display plate 15, a power generation unit 21, an illumination unit 25, a blindfold member 31, and a holding panel 35.

  The apparatus main body 2 is made of synthetic resin or metal, and is formed by connecting a back plate 3 and a front cover 5.

  As shown in FIG. 2, the back plate 3 has a quadrangular shape, and has a bent edge 3 a that is continuous over the lower edge and the left and right side edges and protrudes forward, and is bent from the upper edge to be obliquely forward. It has the receiving edge 3b which protrudes upwards. In the upper part of the center position in the left-right direction of the back plate 3, a Dalma hole-shaped attachment hole 4 is formed. The back plate 3 is fixed to, for example, a doorway of a house by a fixing screw (not shown) passing through the mounting hole 4.

  As shown in FIG. 2, the front cover 5 is formed by connecting a rectangular frame-like frame body 6, a head 8, and a pair of left and right side plates 9.

  As shown in FIG. 3A, the lower edge 6a of the frame 6 protrudes rearward and is bent. The upper edge 6b of the frame body 6 is further bent upwards after protruding forward and being bent. A through-hole 7 penetrating the upper edge 6b in the vertical direction is formed in at least one place, for example, two places, in the upper edge 6b.

  The head 8 is fixed to a portion bent upward of the upper edge 6 b of the frame body 6, and is continuously provided on the upper side of the frame body 6. The opened lower end of the head 8 is positioned below the upper edge 6b of the frame 6 and covers the upper edge 6b. The rear surface of the head 8 is open, and the downward-facing rear edge 8a that partitions the open rear surface from the upper side is bent obliquely upward and forward and has a substantially V-shaped cross section.

  The left and right side plates 9 are connected to the left and right ends of the head 8 and the frame body 6. The upper portions of these side plates 9 are closed so as to close the left and right ends of the head 8 and bend backward with respect to the left and right ends of the frame body 6.

  A connecting member, for example, a nut 10 having a female screw hole therethrough is fixed at a plurality of positions of the frame body 6 of the front cover 5, specifically, at each of the four corners of the frame body 6 by welding or adhesion. These nuts 10 serve as spacers and panel fixing members and project forward from the frame 6, but the female screw holes are also opened on the back surface of the front cover 5.

  The apparatus main body 2 is assembled in the following procedure. First, the back plate 3 is fixed to a doorway of the house with a screw (not shown) passed through the mounting hole 4. Next, the front cover 5 is put on the fixed back plate 3 from the front side. In this case, the upper edge 6 b of the front cover 5 is engaged with the back side of the receiving edge 3 b of the back plate 3 so as to be inserted from above, and the bent edge 3 a of the back plate 3 is overlapped with the inner surface of the peripheral portion of the front cover 5. To. Thereby, the back surface of the front cover 5 is closed by the back plate 3 fitted in the front cover 5. Finally, the connecting screw 11 shown in FIGS. 2 and 3A is screwed upward into the lower edge 6a of the front cover 5 and screwed into the bending edge 3a of the back plate 3 overlying the lower edge 6a. As a result, the assembly of the apparatus main body 2 is completed. Note that at least one connecting screw 11 may be used.

  The display plate 15 is formed of a translucent panel, for example, a transparent acrylic resin plate or a transparent glass plate. The display board 15 has a rectangular shape and is approximately the same size as the frame body 6. The display board 15 has a display (not shown) on at least one of its front and back surfaces. This display is composed of characters, designs, etc., and is preferably provided by engraving.

  The display board 15 is attached to the apparatus main body 2 so as to be exposed to the front thereof. Specifically, the display plate 15 is attached to the frame body 6 which is disposed on the front side of the frame body 6 and below the head 8 and which the apparatus main body 2 has. The display plate 15 is attached to the frame 6 by screwing the nuts 10 through the decorative screws 16 in the respective mounting holes 15a in a state where the mounting holes 15a provided at the four corners of the display plate 15 are aligned with the nuts 10. It is made by. The screwing depth of the decorative screw 16 from the front with respect to the nut 10 is approximately half of the axial length of the nut 10 as shown in FIG.

  3A and 3B, the display board 15 is parallel to the front surface of the frame body 6 with the nut 10 as a spacer and spaced from the front surface of the frame body 6 by a predetermined distance. Placed in. At the same time, the display plate 15 is arranged with the upper side surface 15 b between the front and back surfaces thereof facing directly below the through hole 7.

  The power generation unit 21 is built in the apparatus main body 2 as will be described later. As shown in FIGS. 2 and 3B, the power generation unit 21 and the support plate 22 and one or more, specifically, three solar power units. And a battery panel 23. The number of solar cell panels 23 used is determined according to the generated power required for the nameplate device 1.

  The support plate 22 is made of a metal plate or a synthetic resin plate. The support plate 22 has the same number of recesses 22 a that are open on the front surface of the support plate 22 as the number of solar cell panels 23 used. The front surface of the peripheral portion 22b of the support plate 22 and the front surface of the partition portion 22c between the concave portions 22a are at the same height position with respect to the bottom surface of the concave portion 22a. At the same time, the support plate 22 has a positioning peripheral edge 22d bent forward so as to come into contact with the back surface of the frame body 6 from the peripheral portion 22b.

  The solar cell panel 23 is fitted into each of the recesses 22a and fixed with an adhesive. The plurality of solar battery panels 23 are electrically connected in series. The electric power generated by these solar battery panels 23 is stored in the storage battery 24. As shown in FIG. 3A, the storage battery 24 is disposed in the head 8 of the front cover 5. The storage battery 24 is desirably mounted on a circuit board 26 described later.

  As shown in FIG. 3A, the lighting unit 25 includes a circuit board 26, various electric components 27 for lighting control mounted on the circuit board 26, a light emitting element 28, and the like.

  The circuit board 26 is connected at its lower end to the upper part of the support plate 22 by screws. The circuit board 26 is built in the head 8. A storage battery 24 is electrically connected to the circuit board 26, and the electric power of the storage battery 24 is supplied to the light emitting element 28 via an electrical component 27. In addition, when the electric component 27 has a timer function, this power supply may be performed only in a predetermined time zone for each season, or continuously supplied without such supply control. You can also.

  For example, a light emitting diode is used for the light emitting element 28. The same number of the light emitting elements 28 as the through holes 7 of the front cover 5 are used, and the tips of the light emitting elements 28 are arranged facing the through holes 7 from above or inserted from above. As a result, the light emitted from the light emitting element 28 is applied to the upper side surface 15 b of the display panel 15.

  The blind member 31 has a function of allowing light having a wavelength to generate power to the solar cell panel 23 and suppressing the see-through of the power generation unit 21 from the display panel 15 side. For example, it is made of a black sheet having a light passage hole (not shown) over the entire area. The preferable hole diameter (diameter) of each light passage hole is 0.3 to 0.7 mm, and the hole interval is preferably 0.8 to 1.2 mm.

  As shown in FIG. 3B, the blind member 31 covers the light incident surface formed from the front surface of the solar cell panel 23 and is disposed between the solar cell panel 23 and the display plate 15. That is, the blindfold member 31 is held in surface contact with the back surface of the holding panel 35. And the blindfold member 31 is arrange | positioned with this holding panel 35 in the said position.

  The holding panel 35 is made of a translucent material such as a transparent acrylic resin plate. The thickness of the peripheral portion 35a of the holding panel 35 is thinner than the thickness of the portion surrounded by the peripheral portion 35a, and the portion surrounded by the peripheral portion 35a of the holding panel 35 is forward of the peripheral portion 35a. It is formed in a protruding state.

  Next, assembly of the nameplate apparatus 1 will be described.

  First, after the power generation unit 21 is assembled, an assembly in which the illumination unit 25 is screwed to the upper end portion of the support plate 22 is assembled. At the same time, the solar battery panel 23 and the storage battery 24 of the power generation unit 21 are electrically connected.

  Thereafter, the holding panel 35 with the blindfold member 31 held on the back surface is fitted into the opening of the frame 6 from the back side of the front cover 5 and combined. Thereby, as shown in FIG. 3 (B), the peripheral portion 35a of the holding panel 35 is in contact with the periphery of the opening of the frame body 6 from the back side of the frame body 6, and the holding panel 35 is positioned on the frame body 6. The opening of the frame 6 is closed by the holding panel 35.

  Next, the assembly is disposed on the back side of the holding panel 35, and the storage battery 24 and the lighting unit 25 are accommodated in the head 8 of the front cover 5. In this assembly, as shown in FIG. 3 (B), the peripheral edge 22d of the support plate 22 is fitted to the peripheral portion 35a of the holding panel 35, so that the blindfold member 31 held by the holding panel 35 The assembly is arranged so as to be in surface contact with the surface of the battery panel 23. With this arrangement, the assembly is positioned, and each of the plurality of connecting holes 22e (see FIG. 2) of the support plate 22 communicates with the nut 10 at the corresponding position.

  In this state, the connecting bolts 37 are passed through the connecting holes 22e forward and screwed into the nuts 10 respectively. As a result, the assembly is connected to the back side of the front cover 5, and the holding panel 35 to which the blindfold member 31 is bonded is sandwiched between the assembly and the frame 6 of the front cover 5. Is in close contact with the front surface of each solar cell panel 23. At the same time, the light emitting element 28 of the illumination unit 25 accommodated in the head 8 of the front cover 5 is disposed directly above the through hole 7 opened in the upper edge 6 b of the frame 6.

  Thereafter, the apparatus main body 2 is assembled using the connecting screw 11 according to the procedure described above. Accordingly, the holding panel 35 holding the blindfold member 31 and the assembly are accommodated in the apparatus main body 2.

  Finally, the display board 15 is attached to the front side of the frame 6 included in the front cover 5 using the decorative screw 16 from the front of the front cover 5. Thereby, the display board 15 is disposed in front of the frame body 6 so as to cover the opening of the frame body 6 from the front side, and the assembly of the nameplate apparatus 1 is completed. A state where the assembly is completed is shown in FIGS. 1 and 3A. In this state, the power generation unit 21 is built in the apparatus main body 2 so as to face the back surface of the display plate 15 with the holding panel 35 with the blindfold member 31 interposed between the power generation unit 21 and the frame body 6.

  In the above assembly, the blindfold member 31 made of a low-waist sheet can be handled integrally with the holding panel 35, so that the assemblage of the nameplate apparatus 1 is good. At the same time, the blindfold member 31 is held in contact with the back surface of the holding panel 35 and the front surface of the solar cell panel 23. Therefore, in the nameplate apparatus 1 used outdoors, the blindfold member 31 is fine. The light passage hole is not clogged with dust. Therefore, the power generation performance by photoelectric conversion of the solar cell panel 23 can be maintained without deterioration of the performance of light such as sunlight passing through the blindfold member 31 over a long period of time.

  When the assembled nameplate apparatus 1 is in use, light such as sunlight transmitted through the translucent display plate 15 passes through the transparent holding panel 35 and the light passage hole of the blindfold member 31 to generate the power generation unit. 21 is incident on the solar cell panel 23. For this reason, the solar cell panel 23 generates electric power, and the electric power is stored in the storage battery 24.

  And since the electric power of this storage battery 24 is supplied to the light emitting element 28 of the illumination unit 25, this light emitting element 28 light-emits. Thereby, the light emitted from the light emitting element 28 enters the display plate 15 from the upper side surface 15b of the display plate 15 used as a nameplate, and the display plate 15 is illuminated. Therefore, the display engraved on the display plate 15 can be highlighted by the light emitted from the light emitting element 28.

  When the display panel 15 is viewed in such a state of use, the presence of the power generation unit 21 can be made inconspicuous by the blind member 31 that covers the power generation unit 21 from the light incident side thereof. Therefore, it is difficult to see through the power generation unit 21 regardless of whether or not the light emitting element 28 emits light, so that the display on the display panel 15 is suppressed from being difficult to see by the solar cell panel 23 of the power generation unit 21. Visibility can be improved. In particular, in the present embodiment, since the blindfold member 31 having fine light passage holes throughout the entire area appears as a blackish background, for example, when the light emitting element 28 emits light, the display on the display panel 15 is blindfolded. Since it is more conspicuous in relation to the 31 colors, it is preferable for further improving the visibility of the display.

  Since the power generation unit 21 of the nameplate apparatus 1 is difficult to be visually recognized as described above, the solar cell panel 23 has a shape that is functionally sufficient even if the surface properties such as color are poor. Even if it is defective or the arrangement is poor, it can be used. Therefore, although the incidence of light on the solar cell panel 23 is suppressed with the use of the blind member 31 and the power generation efficiency is reduced, the utilization rate of the solar cell panel 23 used in the nameplate device 1 is improved. Resource efficiency can be increased.

  The present invention is not limited to the one embodiment. For example, as the blindfold member 31, instead of a black sheet with a light passage hole, a mesh net similar to the blindfold member 31 made of this sheet can be used. The net body may be a net body formed of a synthetic resin such as a black type, but a net body formed by knitting a black type of fiber or a metal wire can be used. It is preferable to use a mesh body in which black mesh wires having a diameter of 0.15 to 0.25 mm are knitted with a pitch interval of 0.5 to 0.7 mm.

  In the present invention, a visible light filter can be used as a blindfold member instead of the sheet or the net. The visible light filter has the performance of passing light of the wavelength for converting the light source of the solar battery panel, but not of light of other wavelengths. Therefore, by using this filter, the solar battery Light reception of the panel and visual recognition of the panel can be suppressed. In addition, since the cost of the visible light filter is very high at present, forming the blindfold member with a sheet having a low material cost as in the embodiment described above is the cost of the entire lighting device including the blindfold member. Is preferable in that it can be reduced.

  Further, in the one embodiment, the display plate (illuminated plate) is illuminated with the light emitting element from the upper side surface, but the illumination unit is disposed on at least one of the left and right sides of the display plate (illuminated plate), It is also possible to illuminate at least one of the left and right side surfaces of the display board (illuminated board) from the side. Alternatively, the display plate (illuminated plate) can be illuminated by irradiating light from a plurality of directions, for example, from above and from the side of the display plate (illuminated plate).

  Furthermore, the present invention can be used not only as a nameplate device but also as a post nameplate device, a signboard, or a light emitting device that starts lighting based on the detection of an approach of an object for crime prevention or the like.

  The assembly and display plate 15 described in the above embodiment may be attached to the front cover 5 as follows. First, a spacer member having a hexagonal outer periphery and having a screw hole opened to the front surface, and a connecting member having a stepped structure integrally projecting from the center portion of the rear surface of the spacer portion and having a bolt portion having a smaller diameter than the spacer portion. Is used in place of the nut and fixed to the frame 6 of the front cover 5. This fixing is performed by screwing the bolt part from the front side of the frame body 6 until the stepped portion of the connecting member comes into contact with the front surface of the frame body 6 in each of the screw holes provided at, for example, the four corners of the frame body 6. This is done by protruding the back side of the body 6. Next, the assembly is overlapped on the back side of the front cover 5, and bolt portions are inserted into the connection holes 22 a of the support plate 22 included in the assembly, and then nuts are screwed into the bolt portions and tightened. Thus, the front cover 5 and the assembly are connected. Thereafter, the display plate 15 is applied to the front end of the spacer portion, the display plate 15 is positioned on the front side of the front cover 5, and in this state, the decorative screw 16 is passed through the display plate 15 and screwed into the screw hole of the spacer portion. The display board 15 is fixed by combining. As described above, the assembly and the display plate 15 can be attached to the front cover 5.

The perspective view which shows the nameplate apparatus which concerns on one Embodiment of this invention. The disassembled perspective view which shows the nameplate apparatus of FIG. (A) is sectional drawing which shows the nameplate apparatus of FIG. (B) is sectional drawing which expands and shows the F3B part in FIG. 3 (A). Sectional drawing which shows F4 part in FIG.3 (B).

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Nameplate apparatus (illuminating device), 2 ... Apparatus main body, 15 ... Display board (illuminated board), 15b ... Side surface of a display board, 21 ... Power generation unit, 23 ... Solar cell panel, 24 ... Storage battery, 25 ... Illumination unit 28 ... Light emitting element, 31 ... Blindfold member, 35 ... Holding panel

Claims (4)

The device body;
A translucent illuminated plate attached to the device body;
A power generation unit built in the apparatus main body so as to face the back surface of the illuminated plate having a solar cell panel for photoelectric conversion,
An illumination unit attached to the apparatus body having a light emitting element that emits light to the side surface between the front and back surfaces of the illuminated plate and emits light by the power of a storage battery in which the power generated by the solar cell panel is stored ,
Covering the light incident surface of the solar cell panel, the solar cell panel is disposed between the solar cell panel and the illuminated plate, allows light having a wavelength to generate power to the solar cell panel, and from the illuminated plate side. A blindfold member for suppressing the perspective of the power generation unit;
An illumination device comprising:   The lighting device according to claim 1, wherein the blindfold member is formed of a sheet having fine light passage holes throughout the entire area.   The lighting device according to claim 2, wherein the blindfold member is held in contact with the back surface of the translucent holding panel, and the blindfold member is in contact with the surface of the solar cell panel.   The lighting device according to any one of claims 1 to 3, wherein the illuminated plate is engraved for display.

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