JP2017044746A - Solar battery-compounded-type display - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solar battery-compounded-type display that can be harmonized with its environment and make displaying and power generation compatible with each other.SOLUTION: A solar battery-compounded-type display 10 is equipped with a sheet-shaped main body 40 having a first face 40a and a second face 40b, multiple unit lenses 30 arrayed on the second face 40b along one axial direction d1 to form lens faces 31 on the side reverse to the main body 40, a solar battery panel 50 arranged opposing the second face 40b of the main body 40 and multiple display faces 12 each arranged along part of the lens face 31 of the corresponding unit lens 30. The areas of the lens faces 31 in which the display faces 12 are arranged include areas rs where the angle of incidence of light L21 coming incident in the direction along the normal direction nd of the main body 40 is not smaller than the total reflection critical angle.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a solar cell composite-type display body that includes a display surface for performing display and can also perform power generation using a solar cell panel.

  As an example of such a solar cell composite display, a traffic sign provided with a solar cell panel is described in Patent Document 1. In the traffic sign described in Patent Document 1, it is possible to store the power generated by the solar panel in the daytime and use the stored power as a lighting power source to improve nighttime visibility and daytime warning effect. it can. Further, since a wiring cable or the like for supplying power from the outside is unnecessary, it can be easily installed even in an area where there is no power supply facility. Against this background, development of traffic signs with solar cell panels has been underway in recent years.

JP 2000-54325 A

  In the traffic sign described in Patent Document 1, a solar battery panel is provided above the display surface. The light receiving surface of the solar cell panel is exposed to the outside so that a large amount of power can be obtained by receiving a large amount of external light. For this reason, the light-receiving surface of the solar cell panel is in a position where it can be easily seen by an observer who observes the traffic sign. However, since the light receiving surface of the solar cell panel is a dark blue or black single color, the appearance of the solar cell panel is not compatible with the surrounding environment.

  The present invention has been made in consideration of the above points, and provides a solar cell composite display that can be harmonized with the surrounding environment and can be compatible with both display on the display surface and power generation by the solar cell panel. The purpose is to do. Moreover, an object of this invention is to provide the method of installing such a solar cell composite type display body.

A first solar cell composite display according to the present invention includes a sheet-like main body having a first surface and a second surface facing the first surface;
A plurality of unit lenses that are arranged on the second surface of the main body along the uniaxial direction and form a lens surface on a surface facing the opposite side of the main body;
A solar cell panel disposed to face the second surface of the main body in which the plurality of unit lenses are arranged;
A plurality of display surfaces arranged along the uniaxial direction on the lens surface of the main body unit or the unit lens,
The display surface is inclined with respect to the panel surface of the solar cell panel in a main cut surface parallel to both the uniaxial direction and the normal direction of the main body part,
Light incident on the solar cell composite display body from the first angle range reaches the display surface, and light incident on the solar cell composite display body from a second angle range different from the first angle range, Passing between the unit lens and two adjacent display surfaces to reach the solar cell panel,
The unit lens is a parallel light beam incident on the solar cell composite display body from the second angle range, and is incident on the lens surface from a certain direction inclined with respect to the normal direction of the main body. The parallel luminous flux is transmitted with a higher transmittance than the parallel luminous flux incident on the lens surface from the direction along the normal direction of the main body.

A second solar cell composite display according to the present invention includes a sheet-like main body having a first surface and a second surface facing the first surface;
A plurality of unit lenses that are arranged on the second surface of the main body along the uniaxial direction and form a lens surface on a surface facing the opposite side of the main body;
A solar cell panel disposed to face the second surface of the main body in which the plurality of unit lenses are arranged;
A plurality of display surfaces arranged along the uniaxial direction on the lens surface of the main body unit or the unit lens,
The display surface is inclined with respect to the panel surface of the solar cell panel in a main cut surface parallel to both the uniaxial direction and the normal direction of the main body part,
Light incident on the solar cell composite display body from the first angle range reaches the display surface, and light incident on the solar cell composite display body from a second angle range different from the first angle range, Passing between the unit lens and two adjacent display surfaces to reach the solar cell panel,
The unit lens totally reflects a part of a parallel light beam incident on the lens surface from a direction along a normal direction of the main body.

A third solar cell composite display according to the present invention includes a sheet-like main body having a first surface and a second surface facing the first surface;
A plurality of unit lenses that are arranged on the second surface of the main body along the uniaxial direction and form a lens surface on a surface facing the opposite side of the main body;
A solar cell panel disposed to face the second surface of the main body in which the plurality of unit lenses are arranged;
A plurality of display surfaces arranged along a part of the lens surface of the unit lens corresponding to each of the unit lenses,
The region of the lens surface where the display surface is disposed includes a region where the incident angle of light incident from the direction along the normal direction of the main body is equal to or greater than the total reflection critical angle.

A fourth solar cell composite display according to the present invention includes a sheet-like main body having a first surface and a second surface facing the first surface;
A plurality of unit lenses that are arranged on the first surface of the main body along the uniaxial direction and form a lens surface on a surface facing the opposite side of the main body;
A solar cell panel disposed opposite to the second surface of the main body,
A plurality of display surfaces arranged along the uniaxial direction on the lens surface of the main body unit or the unit lens,
The display surface is inclined with respect to the panel surface of the solar cell panel in a main cut surface parallel to both the uniaxial direction and the normal direction of the main body part,
Light incident on the solar cell composite display body from the first angle range reaches the display surface, and light incident on the solar cell composite display body from a second angle range different from the first angle range, Passing between the unit lens and two adjacent display surfaces to reach the solar cell panel,
The unit lens is a parallel light beam incident on the solar cell composite display body from the second angle range, and is incident on the lens surface from a certain direction inclined with respect to the normal direction of the main body. The parallel luminous flux is transmitted with a higher transmittance than the parallel luminous flux incident on the lens surface from the direction along the normal direction of the main body.

A fifth solar cell composite display according to the present invention includes a sheet-like main body having a first surface and a second surface facing the first surface;
A plurality of unit lenses that are arranged on the first surface of the main body along the uniaxial direction and form a lens surface on a surface facing the opposite side of the main body;
A solar cell panel disposed opposite to the second surface of the main body,
A plurality of display surfaces arranged along the uniaxial direction on the lens surface of the main body unit or the unit lens,
The display surface is inclined with respect to the panel surface of the solar cell panel in a main cut surface parallel to both the uniaxial direction and the normal direction of the main body part,
Light incident on the solar cell composite display body from the first angle range reaches the display surface, and light incident on the solar cell composite display body from a second angle range different from the first angle range, Passing between the unit lens and two adjacent display surfaces to reach the solar cell panel,
The unit lens totally reflects a part of a parallel light beam incident on the lens surface from a direction along a normal direction of the main body.

A sixth solar cell composite display according to the present invention includes a sheet-like main body portion having a first surface and a second surface facing the first surface;
A plurality of unit lenses that are arranged on the first surface of the main body along the uniaxial direction and form a lens surface on a surface facing the opposite side of the main body;
A solar cell panel disposed opposite to the second surface of the main body,
A plurality of display surfaces arranged along a part of the lens surface of the unit lens corresponding to each of the unit lenses,
The region of the lens surface where the display surface is disposed includes a region where the incident angle of light incident from the direction along the normal direction of the main body is equal to or greater than the total reflection critical angle.

  1st thru | or 6th solar cell composite display body by this invention WHEREIN: The said main-body part has a side surface extended between the said 1st surface and the said 2nd surface, and it reflects on the said side surface of the said main-body part. A layer may be provided.

  In the first to sixth solar cell composite display bodies according to the present invention, a display target element may be provided on each display surface, and a display target may be formed by a combination of the display target elements.

  ADVANTAGE OF THE INVENTION According to this invention, while aiming at harmony with the surrounding environment, the solar cell composite-type display body which can be compatible with the display by a display surface and the electric power generation by a solar cell panel can be provided.

FIG. 1 is a perspective view showing a solar cell composite display body, for explaining the first embodiment. FIG. 2 is a cross-sectional view taken along the line II-II in FIG. FIG. 3 is a diagram illustrating a state in which a parallel light beam is incident on the unit lens along the optical axis. FIG. 4 is a diagram illustrating a state in which a parallel light beam is incident on the unit lens illustrated in FIG. 3 from a direction inclined with respect to the optical axis. FIG. 5 is a diagram illustrating an example of a unit lens in which total reflection does not occur when a parallel light beam is incident from a direction along the optical axis. FIG. 6 is a diagram showing a state in which a parallel light beam is incident on the unit lens shown in FIG. 5 from a direction inclined with respect to the optical axis. FIG. 7 is a graph showing a result of simulating the relationship between the incident angle of the parallel light flux and the light transmittance for a plurality of unit lenses having different aspect ratios. FIG. 8 is a diagram illustrating an example of a display target displayed on the solar cell composite display. FIG. 9 is a diagram for explaining the operation of the solar cell composite display body in the same cross section as FIG. FIG. 10 is a diagram for explaining the operation of the solar cell composite display body in the same cross section as FIG. FIG. 11 is a diagram for explaining a method of manufacturing a solar cell composite display. FIG. 12 is a diagram for explaining a method for manufacturing a solar cell composite display. FIG. 13 is a perspective view showing an example in which a reflective layer is further provided on the solar cell composite display shown in FIG. FIG. 14 is a diagram for explaining the second embodiment, and is a cross-sectional view showing a solar cell composite display. FIG. 15 is a perspective view showing a solar cell composite display body, for explaining the third embodiment. 16 is a cross-sectional view taken along line XVI-XVI in FIG.

  Hereinafter, embodiments will be described with reference to the drawings. In the drawings attached to the present specification, for the sake of illustration and ease of understanding, the scale, the vertical / horizontal dimension ratio, and the like are appropriately changed and exaggerated from those of the actual product. In addition, as used in this specification, the shape and geometric conditions and the degree thereof are specified, for example, terms such as “parallel”, “orthogonal”, “identical”, length and angle values, etc. are strictly Without being bound by meaning, it should be interpreted including the extent to which similar functions can be expected.

<< First Embodiment >>
1-13 is a figure for demonstrating 1st Embodiment. 1 and 2 are perspective views or longitudinal sectional views showing the configuration of the solar cell composite display body 10, and FIGS. 3 to 7 are diagrams for explaining optical characteristics of the unit lens 30. FIG. 8 to 10 are diagrams for explaining the operation of the solar cell composite display body 10, and FIGS. 11 and 12 are diagrams for explaining an example of a method for manufacturing the solar cell composite display body. is there.

  The solar cell composite display 10 described here exhibits both a predetermined display function and a power generation function using external light. 1 and FIG. 2 includes a plurality of unit lenses 30 arranged in the first axial direction d1, and the display surface 12 is part of the lens surface 31 of each unit lens 30. Has been placed. When the solar cell composite display body 10 is observed from the direction D21 within a certain angle range AR1, the display surface 12 disposed mainly on a part of the lens surface 31 of the unit lens 30 is observed. Therefore, the display surface 12 mainly exhibits a display function for an observer who observes the solar cell composite display body 10 from a certain angle range AR1. On the other hand, the light L23 incident from a direction within another certain angular range AR2 is mainly transmitted through the lens surface 31 of the unit lens 30 and guided to the solar cell panel 50. Therefore, the solar cell panel 50 mainly exhibits a power generation function with respect to light incident on the solar cell composite display body 10 from another certain angular range AR2. Thus, according to the solar cell composite display 10, the solar cell panel 50 is used when the observer observes the display surface 12 by utilizing the difference between the observation direction from the observer and the incident direction of the external light. Visibility is suppressed and it is possible to achieve harmony with the surroundings.

  Hereinafter, the configuration and operational effects of the solar cell composite display 10 according to the present embodiment will be described in detail. As well shown in FIGS. 1 and 2, the solar cell composite display 10 includes a light control sheet 20 and a solar cell panel 50 disposed on the back surface of the light control sheet 20. . The light control sheet 20 forms the surface 10 a of the solar cell composite display 10. The surface 10a forms an incident surface on which external light such as sunlight that enters the solar cell composite display 10 is incident, and light from the display surface 12 that visualizes the display target 13 (see FIG. 8) is sun light. An emission surface that emits light from the battery composite display 10 is also formed.

  The light control sheet 20 includes a sheet-like main body portion 40 and a shaping portion 25 stacked on the main body portion 40. Among these, the main-body part 40 has the 1st surface 40a and the 2nd surface 40b as a pair of main surface which mutually opposes. The first surface 40 a forms the surface 10 a of the solar cell composite display body 10, and the second surface 40 b forms a surface adjacent to the shaping portion 25. The main body 40 is made of a material having excellent light transmittance so that light incident on the solar cell composite display 10 is efficiently transmitted.

  In the present specification, terms such as “sheet”, “film”, and “plate” are not distinguished from each other only based on the difference in names. Therefore, for example, a “sheet” is a concept including a member that can also be called a film or a plate. As a specific example, the “light control sheet” includes members called “light control film”, “light control plate”, and the like.

  Further, in this specification, the “sheet surface (film surface, plate surface, panel surface)” is the plane of the target sheet-like member when the target sheet-like member is viewed as a whole and globally. A surface that matches the direction. In the embodiment described below, the panel surface of the solar cell composite display 10, the sheet surface of the light control sheet 20, the sheet surface of the main body 40, and the panel surface of the solar cell panel 50 are parallel to each other. It has become. Furthermore, in this specification, the “normal direction” used for a sheet-like (film-like, plate-like, panel-like) member refers to a normal direction to the sheet surface of the member.

  The shaping part 25 arrange | positioned at the 2nd surface 40b of the main-body part 40 contains many unit lenses 30 arranged in the 1st axial direction d1. In the present embodiment, the first axial direction d1 is along the sheet surface of the main body 40 and is orthogonal to the normal direction nd of the main body 40. In the illustrated example, the first axial direction d1 is parallel to the vertical direction.

  A large number of unit lenses 30 are arranged such that their optical axes od are parallel to each other. In the present embodiment, the optical axis od of each unit lens 30 is parallel to the normal direction nd of the main body 40.

  In particular, the unit lenses 30 constitute so-called lenticular lenses or cylindrical lenses as shown in FIG. That is, the unit lenses 30 extend linearly in a direction intersecting the first axis direction d1 that is the arrangement direction. In particular, in the illustrated example, the unit lens 30 extends linearly in a second axial direction d2 that is orthogonal to both the first axial direction d1 and the normal direction nd. The multiple unit lenses 30 are configured identically to each other.

  Each unit lens 30 protrudes from the sheet-like main body portion 40 toward the normal direction nd of the main body portion 40, and defines a lens surface 31 formed in a convex lens shape on the surface thereof. In the cross section of FIG. 2 parallel to both the first axial direction d1 and the normal direction of the solar cell panel 50, that is, the normal direction nd of the main body 40 (hereinafter also referred to as “main cut surface”), the lens The surface 31 is symmetric about the optical axis od. As shown in FIG. 2, each unit lens 30 collects parallel light beams incident on the lens surface 31 in a condensing region. The unit lens 30 shown in FIG. 2 shows an example in which the parallel light beam L22 incident along the optical axis od of the unit lens 30 is collected at the focal point fp. In this case, the focal point fp is the optical axis od of the unit lens 30. Located on the top.

  FIG. 3 is an enlarged view showing a state in which the parallel light beam L31 enters the unit lens 30 along the optical axis od. As shown in FIG. 3, the unit lens 30 totally reflects a part of the parallel light beam L31 incident on the lens surface 31 along the optical axis od, that is, along the normal direction nd of the main body 40. That is, the unit lens 30 according to the present embodiment is not intended to transmit light incident on the lens surface 31 along the normal direction nd of the main body 40 with high transmittance. Here, the transmittance refers to the ratio of the amount of light transmitted through the lens surface 31 to the amount of parallel light incident on the lens surface 31.

  FIG. 4 is a diagram showing that the light beam L41 is incident on the unit lens 30 from a direction inclined with respect to the optical axis od. In FIG. 4, the light beam is inclined by 60 ° with respect to the optical axis od. As shown in FIG. 4, the unit lens 30 transmits the parallel light beam L41 incident on the lens surface 31 from a direction inclined with respect to the optical axis od with a high transmittance. More specifically, the unit lens 30 has a light beam L41 incident on the lens surface 31 from a direction inclined with respect to the optical axis od, rather than a light beam L31 incident on the lens surface 31 along the normal direction nd of the main body 40. Is transmitted with high transmittance. As will be described later, since the solar altitude during the day is often in the range of 30 ° to 60 °, when the normal direction nd of the main body 40 faces the front direction, it is inclined with respect to the optical axis od. More light can be guided to the solar cell panel 50 as a whole by transmitting the light L41 incident on the lens surface 31 from the direction with a relatively high transmittance.

  On the other hand, FIG. 5 is a diagram illustrating an example of the unit lens 300 in which total reflection does not occur when the parallel light beam L51 is incident from the direction along the optical axis od. The unit lens 300 shown in FIG. 5 transmits all the parallel light beams L51 incident on the lens surface 310 along the optical axis od, but does not totally reflect even a part thereof. That is, in the unit lens 300 shown in FIG. 5, the parallel light beam L51 incident on the lens surface 310 along the optical axis od is less than the total reflection critical angle at an arbitrary point on the lens surface 310.

  FIG. 6 is a diagram illustrating a state in which the light beam L61 is incident on the unit lens 300 illustrated in FIG. 5 from a direction inclined with respect to the optical axis od. As shown in FIG. 6, the unit lens 300 shown in FIG. 5 totally reflects a part of the parallel light beam L61 incident on the lens surface 310 from the direction inclined with respect to the optical axis od, and transmits with high transmittance. I can't let you. That is, the unit lens 300 that transmits all the parallel light beams L101 incident on the lens surface 310 along the optical axis od has a high transmittance for the parallel light beams L61 incident on the lens surface 310 from a direction inclined with respect to the optical axis od. It cannot be transmitted. Since the solar altitude during the day is often in the range of 30 ° to 60 °, when the normal direction nd of the main body 40 faces the front direction, the unit lens 300 shown in FIG. On the other hand, the light L61 incident on the lens surface 31 from the inclined direction cannot be transmitted with high transmittance, and a large amount of light cannot be guided to the solar cell panel 50 as a whole.

FIG. 7 is a graph showing a result of simulating the relationship between the incident angle of the parallel light flux and the light transmittance for a plurality of unit lenses having different aspect ratios. In the graph of FIG. 7, the horizontal axis indicates the incident angle of the parallel light flux to the lens surface, and the vertical axis indicates the transmittance of the parallel light flux at each incident angle. Further, the aspect ratio of the investigated unit lens is as shown in Table 1 below.

  As can be understood from the graph of FIG. 7, in Samples 1 and 2 having an aspect ratio of 0.1 or less, the light transmittance tended to decrease as the incident angle of the parallel light flux increased. On the other hand, in Samples 3 to 7 having an aspect ratio of about 0.2 to 0.3, even when the incident angle of the parallel light flux changed, the light transmittance tended not to change much. In Samples 8 and 9 having an aspect ratio of about 0.4 to 0.5, the light transmittance tended to increase as the incident angle of the parallel light flux increased.

  In particular, the unit lenses according to Samples 1 and 2 have a transmittance of 100% for a parallel light beam with an incident angle of 0 °. That is, the unit lenses according to samples 1 and 2 correspond to lenses that transmit all the parallel light beams incident on the lens surface 310 along the optical axis od as shown in FIGS. Also from the result of the graph of FIG. 7, the lens that transmits all the parallel light beams incident on the lens surface 310 along the optical axis od has a high parallel light beam incident on the lens surface 310 from the direction inclined with respect to the optical axis od. It turns out that it cannot be permeate | transmitted with the transmittance | permeability.

  Now, referring back to FIG. 2, the unit lenses 30 are arranged in the first axial direction d1 with a gap therebetween. That is, a connection surface 38 that connects the two lens surfaces 31 is provided between the lens surfaces 31 of the two unit lenses 30 adjacent in the first axial direction d1. In the illustrated example, the connection surface 38 extends along the seat surface of the main body 40. The plurality of lens surfaces 31 and the plurality of connection surfaces 38 constitute a surface facing the solar cell panel 50 side of the light control sheet 20. As an example, the light control sheet 20 can be produced by resin molding using a mold. By providing the connection surface 38 and providing a gap between the adjacent unit lenses 30, light from an angle range greatly inclined with respect to the normal direction nd is emitted from the lens surface 31 of the unit lens 30 and then adjacent thereto. The problem of being blocked by the unit lens 30, so-called “vignetting”, can be reduced.

  Returning to FIG. 2, the display element 11 is arranged along a part of the lens surface 31 of each unit lens 30. Therefore, the plurality of display elements 11 are arranged in the first axial direction d <b> 1 corresponding to the unit lens 30, which is the arrangement direction of the unit lenses 30. Similarly to the unit lens 30, each display element 11 is linear in a direction intersecting the first axis direction d1 that is the arrangement direction, more strictly in a second axis direction d2 orthogonal to the first axis direction d1. It extends to.

  Here, in the main cut surface shown in FIG. 2, the both ends of the lens surface 31 are located on one side in the first axial direction d1 (in the example shown, the upper side in FIG. 2 and the upper side in the vertical direction). The end portion to be referred to as one end portion 31a, and the end portion located on the other side in the first axial direction d1 (in the illustrated example, the lower side in FIG. 2 and the lower side in the vertical direction) is referred to as the other end portion 31b. The point most distant from the one end 31a and the other end 31b along the normal direction nd of the main body 40 is referred to as a top 31c. The top portion 31 c of the present embodiment is a point closest to the solar cell panel 50 in the lens surface 31. The optical axis od of the unit lens 30 passes through the top portion 31c.

  Furthermore, in the main cut surface shown in FIG. 2, the area from the top part 31c to the one end part 31a located on one side in the first axial direction d1 among the lens surfaces 31 is called a one-side area 32a. A region up to the other end portion 31b located on the other side in the one axial direction d1 is referred to as an other side region 32b.

  As understood from FIG. 2, the one-side region 32 a extends from the top portion 31 c side to the one end portion 31 a side along the first axial direction d <b> 1 and extends along the normal direction nd of the main body portion 40. Keep away from. On the other hand, the other side region 32a is separated from the solar cell panel 50 along the normal direction nd of the main body portion 40 as it goes from the top portion 31c side to the other end portion 31b side along the first axial direction d1.

  Each display element 11 covers at least a part of one side region 32a of the lens surface 31 of the corresponding unit lens 30. In the example shown in FIG. 2, each display element 11 covers the entire one side region 32 a of the lens surface 31 of the corresponding unit lens 30 without a gap.

  On the other hand, each display element 11 is arranged so as to be shifted from the other side region 32 b of the lens surface 31 of the corresponding unit lens 30. That is, each display element 11 does not cover the other side region 32 b of the lens surface 31 of the corresponding unit lens 30. However, each display element 11 may cover a part of the other side region 32 b of the lens surface 31 of the corresponding unit lens 30.

  As shown in FIGS. 2 and 3, the one-side region 32a includes a region rs where the light L21 incident from the direction along the optical axis od is totally reflected. That is, the one side region 32a where the display element 11 is disposed includes a region where the incident angle of the light L21 incident from the direction along the normal direction nd of the main body 40 is equal to or greater than the total reflection critical angle.

  As described above, the solar cell composite display 10 according to the present embodiment is intended to be observed from the surface 10a side, and each display element 11 performs display on the surface facing the surface 10a side. The display surface 12 is provided. Since the display element 11 is disposed along the one side region 32a of the lens surface 31, the display surface 12 is also curved along the one side region 32a of the lens surface 31 correspondingly. More specifically, each display surface 12 corresponds to the shape of the one side region 32a of the lens surface 31, and one end portion 12a positioned on one side in the first axial direction d1 is on the other side in the first axial direction d1. It is curving so that it may space apart from the solar cell panel 50 in the normal line direction nd of the main-body part 40 rather than the other end part 12b located in this. As understood from FIG. 2, such a display surface 12 is easily visually recognized when observed from a direction D <b> 21 inclined to the other side (lower side) with respect to the normal direction nd. Therefore, the display function from the display surface 12 is effectively exhibited when observed from the direction D21 inclined to the other side with respect to the normal direction nd.

  In the present embodiment, the display target 13 is displayed by a combination of a plurality of display surfaces 12. Examples of the display target 13 include patterns (images) such as figures, patterns, designs, colors, pictures, photographs, and characters, and information such as letters, marks, and numbers. The display target 13 may be stationary or moving. In particular, when displaying the moving display object 13 on the display surface 12, it is easy to use electricity generated from the solar cell panel 50 for driving.

  FIG. 8 shows an example of the display target 13 given to the display surface 12. The plurality of display surfaces 12 are arranged in the first axis direction d1 corresponding to the plurality of unit lenses 30, and each display surface 12 is linear in the second axis direction d2 orthogonal to the first axis direction d1. It extends to. Therefore, the display surface 12 located at each position in the first axial direction d1 is given the display target component 13a according to the position of the display surface 12 in the first axial direction d1, so that the display surface 12 in the second axial direction d2 A two-dimensional display target 13 can be displayed as a combination of display target components 13a formed on each elongated display surface 12. In the example shown in FIG. 8, the capital letter “N” of the alphabet is displayed as the display target 13. Thus, since the size of each display surface 12 and each unit lens 30 can be reduced by displaying the display target 13 as a combination of a plurality of display target components 13a, the solar cell composite display 10 can be made compact. Is advantageous.

  In FIG. 8, the character “N” as the display target 13 is displayed in a discontinuous manner and is not displayed as a combination of continuously connected pixels. However, the interval between each display target component 13a and each adjacent display target component 13a is set to be sufficiently small, and for the naked eye, pixels in which the characters “N” as the display target 13 are continuously connected. Note that it can be viewed as:

  Now, returning to FIG. 2, the other side region 32 b of the lens surface 31 is not covered with the display element 11. For this reason, the light L23 incident on the other side region 32b passes through the other side region 32b while being refracted and travels toward the solar cell panel 50. That is, the region 32 b of the lens surface 31 that is not covered with the display element 11 functions as a light transmission region that guides the incident light L 23 to the light incident surface 50 a of the solar cell panel 50.

  The light L23 received by the light incident surface 50a of the solar cell panel 50 is used for power generation by the solar cell element included in the solar cell panel 50. The solar cell panel 50 is disposed so as to face the unit lens 30 and be separated from the unit lens 30.

  As shown in FIG. 2, the solar cell panel 50 extends in a planar shape so as to face the plurality of unit lenses 30 arranged in the first axial direction d1. In the illustrated example, the solar cell panel 50 extends in parallel with the sheet surface of the main body 40, in other words, the panel surface of the solar cell composite display body 10. Therefore, in the illustrated example, the solar cell panel 50 extends in parallel with the first axis direction d1 that is the arrangement direction of the unit lenses 30, and is also parallel to the second axis direction d2 that is the longitudinal direction of the unit lenses 30. It extends and spreads. Various known members can be used as the solar cell panel 50 and are not particularly limited.

  In particular, in the main cut surface shown in FIG. 2, the solar cell panel 50 is disposed at a position farther from the unit lens 30 than the focal point fp at which the parallel light beam L22 incident along the optical axis od of the unit lens 30 converges. ing. According to such an arrangement, the parallel light beam L22 that enters the solar cell composite display 10 and travels toward the solar cell panel 50 reaches the solar cell panel 50 in a state of spreading after being condensed in the condensing region. For this reason, it contributes to making the parallel light beam L22 incident on the solar cell complex 10 reach a wide region of the solar cell panel 50.

  In the example illustrated in FIG. 2, the solar cell panel 50 is illustrated as being spaced apart from the light control sheet 20 via the air layer, but is not limited to such an example. For example, the solar cell panel 50 may be bonded to the light control sheet 20 via a low refractive index layer having a lower refractive index than the resin material forming the unit lens 30.

  Next, an example of the manufacturing method of the solar cell composite display 10 described above will be described mainly with reference to FIGS.

  First, as shown in FIG. 11, the main body 40 and the unit lens 30 are manufactured by molding a transparent resin. For the molding, hot-melt extrusion processing, injection molding, or the like can be employed. Next, as shown in FIG. 12, the display element 11 is arranged on the lens surface 31 of the unit lens 30. As an example, the display element 11 can be disposed on the lens surface 31 by inkjet printing. Thereafter, the solar cell panel 50 is installed so as to face the unit lens 30. Thereby, the solar cell composite display 10 is obtained.

  The solar cell composite display 10 thus obtained can be used for various purposes. For example, the solar cell composite display 10 has a size of several meters to several tens of meters used for outdoor signboards, road information bulletin boards, outer wall surfaces of buildings, and the like. Large panel use, medium size panel use of several tens of centimeters to several meters used for posters, signs, inner walls of buildings, etc., and small panel use of several centimeters to several tens of centimeters used for table lamps, portable terminals, etc. Etc. can be illustrated.

  Next, the operation of the solar cell composite display 10 will be described mainly with reference to FIGS. 9 and 10. For example, the solar cell composite display 10 is arranged such that the first axis direction d1 that is the arrangement direction of the unit lenses 30 is along the vertical direction. Specifically, the solar cell composite display 10 is arranged such that one side in the first axial direction d1 is along the upper side in the vertical direction and the other side in the first axial direction d1 is along the lower side in the vertical direction. The

  As is well shown in FIG. 9, the display surface 12 of the display element 11 disposed in the one side region 32 a of the lens surface 31 is easily visible from the front direction of the display surface 12. In the example shown in FIG. 9, the display surface 12 is curved such that one end portion 12a thereof is separated from the solar cell panel 50 more than the other end portion 12b, and therefore in the first axial direction d1 with respect to the normal direction nd. When the solar cell composite display 10 is observed from the directions D91, D92, and D93 in the first angle range AR1 inclined to the other side, the display surface 12 is easily visible. Therefore, when the observer observes the solar cell composite display 10 from the directions D91, D92, and D93 inclined to the other side in the first axial direction d1 with respect to the normal direction nd, the display is performed with excellent visibility. The object 13 can be observed.

  On the other hand, the light L101, L102, L103 incident on the solar cell composite display 10 from a direction different from the directions D91, D92, D93 in which the display surface 12 is easily visible, that is, the first axial direction d1 with respect to the normal direction nd. The light L101, L102, and L103 incident on the solar cell composite display body 10 from the direction inclined to one side in FIG. The light L101, L102, and L103 that are not incident on the display surface 12 are incident on the other side region 32b that is not mainly covered with the display element 11, and pass through the other side region 32b while being refracted by the lens action. Go to panel 50. As described above, the light L101, L102, and L103 incident on the solar cell composite display 10 from the second angle range AR2 that is different from the directions D91, D92, and D93 in which the display surface 12 is easily visible are mainly solar cells. By making it permeate | transmit toward the panel 50, it becomes possible to aim at coexistence of a display function and an electric power generation function.

  In particular, the altitude of the sun varies depending on the season and time zone, but the altitude of the sun during the day is often in the range of 30 ° to 60 °, for example. For this reason, sunlight L101, L102, and L103 falling on the solar cell composite display 10 is inclined upward with respect to the horizontal plane, that is, from the direction inclined upward with respect to the normal direction nd of the main body 40. It is mainly incident on the lens surface 31. In this respect, the unit lens 30 according to the present embodiment is from a direction inclined with respect to the normal direction nd of the main body 40 from the light beam L104 incident on the lens surface 31 along the normal direction nd of the main body 40. The light beams L101, L102, and L103 incident on the lens surface 31 are transmitted with high transmittance. For this reason, the sunlight L101, L102, L103 during the day that is incident on the lens surface 31 from a direction inclined with respect to the normal direction nd of the main body 40 can be transmitted with a relatively high transmittance, and as a whole A lot of light can be guided to the solar cell panel 50.

  However, the sunlight L104 in the early morning or sunset time period does not occupy a very long time, but is incident on the solar cell composite display 10 from substantially the horizontal direction. A part of such sunlight L104 is totally reflected by the lens surface 31. For this reason, it seems that the sunlight L104 which injects into the solar cell composite display body 10 from a substantially horizontal direction cannot be effectively used. However, in the present embodiment, since the display surface 12 is disposed along a part of the lens surface 31, even if the lens surface 31 transmits all the light, it should be transmitted through the lens surface 31. Part of the light is blocked by the display surface 12. In this respect, in the present embodiment, the region where the display surface 12 that blocks the light that should pass through the lens surface 31 is disposed, and the region that totally reflects the light L104 incident on the lens surface 31 from the horizontal direction. It corresponds to rs. For this reason, the area | region which interrupts | blocks the light L104 which injects into the lens surface 31 from a horizontal direction can be suppressed to the minimum, and it becomes possible to aim at the effective use of sunlight L101-L104 as a whole.

  As described above, according to the solar cell composite display body 10 according to the present embodiment, the sheet-like main body portion 40 having the first surface 40a and the second surface 40b facing the first surface 40a, and the uniaxial direction d1. A plurality of unit lenses 30 that are arranged on the second surface 40b of the main body 40 along the surface and that form a lens surface 31 on a surface facing the opposite side of the main body 40, and a main body in which the plurality of unit lenses 30 are arranged A plurality of display surfaces 12 arranged along the uniaxial direction d1 on the lens surface 31 of the main body 40 or the unit lens 30; The display surface 12 is inclined with respect to the panel surface of the solar cell panel 50 at a main cut surface parallel to both the uniaxial direction d1 and the normal direction nd of the main body 40, and is a solar cell composite type from the first angle range AR1. Incident on the display 10 The light reaches the display surface 12, and light incident on the solar cell composite display body 10 from the second angle range AR2 different from the first angle range AR1 passes between the unit lens 30 and the two adjacent display surfaces 12. It passes through and reaches the solar cell panel 50. According to such a form, since the display surface 12 is inclined with respect to the panel surface of the solar battery panel 50, the inclined display surface 12 is easily observed from the directions D21 and D91 to D93 that are the front direction. . On the other hand, the light beams L23 and L101 to L103 that are incident on the solar cell composite display body 10 from directions different from the directions D21 and D91 to D93 that allow the display surface 12 to be easily seen are between the two adjacent display surfaces 12. The light is transmitted and guided to the solar cell panel 50. As described above, the difference between the observation directions D21 and D91 to D93 from the observer and the incident directions of the external lights L23 and L101 to L103 is used to harmonize with the surrounding environment, and display on the display surface 12 and Coexistence of power generation by the solar cell panel 50 is effectively enabled. In addition, since the solar cell panel 50 is disposed to face the second surface 40b of the main body 40, the light receiving surface 50a of the solar cell panel 50 is not exposed to the outside. For this reason, the solar cell panel 50 can be made more inconspicuous.

  In addition, the unit lens 30 is a parallel light beam L23 incident on the solar cell composite display body 10 from within the second angle range AR2, and is a lens from a certain direction inclined with respect to the normal direction nd of the main body 40. The parallel light beam L23 incident on the surface 31 is transmitted with a higher transmittance than the parallel light beam L22 incident on the lens surface 31 from the direction along the normal direction nd of the main body 40. When the solar cell composite display 10 is installed so that the ratio of the sunlight L22 and L23 incident on the lens surface 31 from a direction inclined with respect to the normal direction nd of the main body 40 is large when viewed as a whole. The sunlight L23 incident on the lens surface 31 can be guided to the solar cell panel 50 with a relatively high transmittance, and the power generation amount of the solar cell panel 50 can be increased as a whole.

  Further, the unit lens 30 totally reflects a part of the parallel light beam L22 incident on the lens surface 31 from the direction along the normal direction nd of the main body 40. By designing the lens surface 31 like this, the lens surface 31 is made to transmit the sunlight L23 incident on the lens surface 31 from a direction inclined with respect to the normal direction nd of the main body portion 40 with high transmittance. Can be optimized. As a result, when viewed as a whole, the sunlight L23 incident on the lens surface 31 can be guided to the solar cell panel 50 with a relatively high transmittance, and the power generation amount of the solar cell panel 50 can be increased.

  Or according to this Embodiment, the sheet-like main-body part 40 which has the 2nd surface 40b facing the 1st surface 40a and the 1st surface 40a, and the 2nd surface 40b of the main-body part 40 along uniaxial direction d1. And a plurality of unit lenses 30 forming a lens surface 31 on a surface facing the opposite side of the main body 40, and a second surface 40b of the main body 40 on which the plurality of unit lenses 30 are arranged. And a plurality of display surfaces 12 arranged along a part of the lens surface 31 of the unit lens 30 corresponding to each of the solar cell panels 50. According to such a form, since the some display surface 12 is arrange | positioned in the front surface of the solar cell panel 50, the solar cell panel 50 can be made not conspicuous. On the other hand, since each display surface 12 is disposed along a part of the corresponding lens surface 31, external light L22 and L23 that are not blocked by the display surface 12 adjust the traveling direction at the lens surface 31. It goes toward the solar cell panel 50 while being done. Thereby, the external lights L22 and L23 not blocked by the display surface 12 can be effectively utilized for power generation by the solar cell panel 50 while utilizing the lens effect. In this way, according to the present embodiment, the solar cell panel 50 is made inconspicuous so as to achieve harmony with the surrounding environment, and at the same time, both the display on the display surface 12 and the power generation by the solar cell panel 50 are achieved. Is possible. In addition, since the display surface 12 can be arranged on a part of the lens surface 31 of each unit lens 30, the solar cell composite display body 10 can be easily manufactured.

  In addition, according to the present embodiment, in the region where the display surface 12 is arranged in the lens surface 31, the incident angle of the light L21 incident from the direction along the normal direction nd of the main body 40 is totally reflected. A region rs that is greater than the critical angle is included. According to such a configuration, the light incident on the lens surface 31 from the direction along the normal direction nd of the main body portion 40 is set in the region where the display surface 12 that blocks the light to be transmitted through the lens surface 31 is disposed. It is possible to correspond to the region rs that totally reflects L104. For this reason, the area | region which interrupts | blocks the light L104 which injects into the lens surface 31 from the direction along the normal line direction nd of the main-body part 40 can be suppressed to the minimum, and the effective use of sunlight L101-L104 is aimed at as a whole. It becomes possible.

  Further, according to the present embodiment, in the cross section parallel to both the uniaxial direction d1 and the normal direction nd of the main body portion 40, one side of the lens surface 31 from the top portion 31c of the lens surface 31 in the uniaxial direction d1. If the region from the top 31c to the other end 31b located on the other side in the uniaxial direction d1 is the other side region 32b, the display surface 12 At least a part of the one side region 32a of the lens surface 31 of the corresponding unit lens 30 is covered. In this case, the one side region 32a is observed when the solar cell composite display 10 is observed from the directions D21, D91 to D93 inclined to the other side in the uniaxial direction d1 with respect to the normal direction nd of the main body 40. easy. Therefore, when the solar cell composite display body 10 is observed from the directions D21 and D91 to D93 inclined to the other side in the uniaxial direction d1, the display surface 12 arranged in the one side region 32a can be easily seen. .

  In particular, according to the present embodiment, each display surface 12 is displaced from the other side region 32 b of the lens surface 31 of the corresponding unit lens 30. In this case, light L23 from a direction inclined to one side in the uniaxial direction d1 with respect to the normal direction nd of the main body portion 40 is likely to enter the other side region 32b. Therefore, by disposing the display surface 12 in the other side region 32b, the light L23 incident on the solar cell composite display body 10 from a direction inclined to one side in the uniaxial direction d1 can be easily guided to the solar cell panel 50. Thus, by utilizing the difference between the observation direction D21 from the observer and the incident direction of the external light L23, it is possible to further achieve both the display by the display surface 12 and the power generation by the solar cell panel 50.

  In particular, in the solar cell composite 10 according to the present embodiment, the uniaxial direction d1 that is the arrangement direction of the unit lenses 30 is along the vertical direction, one side in the uniaxial direction d1 corresponds to the upper side, and the other side in the uniaxial direction d1 is the lower side. It corresponds to. Such a method of installation is suitable for the case where the solar cell composite 10 is installed at a position higher than the line of sight in a use as a display plate assumed as a typical use. Since the observer observes the solar cell complex 10 while looking up to the upper side in the vertical direction, it is easy to visually recognize the display surface 12 arranged in the one side region 32a. On the other hand, although the incident direction of sunlight changes depending on the time zone and season, it enters the solar cell composite display 10 while proceeding in a direction inclined downward in the vertical direction. For this reason, even if the incident direction changes according to the time zone and season, sunlight is incident on the solar cell composite display body 10 from a direction inclined downward in the vertical direction, and is mainly transmitted through the lens surface 31. It can go to the solar cell panel 50. Therefore, according to such a form, the display by the display surface 12 and the electric power generation by the solar cell panel 50 can be effectively made compatible.

  By the way, Table 2 below shows the south-middle altitude (°) for each season in major cities in some countries of the world. It is preferable that the south and middle altitudes of the equinox in the major cities of the country where the use is assumed be included in the second angle range AR2. This is because there is a high possibility that it can be used effectively in that country. For example, when the country assumed to be used is Japan, the altitude from 54 ° to 56 ° may be included in the second angle range AR2. Furthermore, it is preferable that an altitude from 49 ° to 61 ° is included in the second angle range AR2, since there is a high possibility that it can be used effectively in many countries in the world. In addition, it is more preferable that the second angle range AR2 includes a range from the southern middle altitude of the summer solstice to the southern middle altitude of the winter solstice in the main cities of the country assumed to be used. This is because there is a high possibility that it can be used effectively throughout the year in that country. For example, when the country assumed to be used is Japan, the altitude from 31 ° to 79 ° may be included in the second angle range AR2. Furthermore, it is preferable that an altitude of 25 ° to 84 ° is included in the second angle range AR2, since there is a high possibility that it can be used effectively in many countries in the world. In order to make it easier for the desired altitude to be included in the second angle range AR2, it is preferable that the angle range of the second angle range AR2 is continuous by about 45 ° or more. However, it is also possible to make the desired altitude fall within the second angle range AR2 by arranging the solar cell composite display 10 so as to be inclined. On the other hand, the upper limit of the angle range of the second angle range AR2 may be appropriately set in balance with the first angle range AR1, but by setting it to less than about 135 °, the solar cell composite display according to the present embodiment. The features of the body 10 can be exhibited more.

  In the above-described embodiment, as illustrated in FIG. 2, each unit lens 30 is an example of a convex lens that protrudes toward the normal direction nd of the main body 40. It is not limited to such an example. Each unit lens 30 may be a concave lens that is recessed toward the normal direction nd of the main body 40.

  Moreover, the solar cell composite display 10 described above may further include a reflective layer 70 disposed around the main body 40. FIG. 13 shows an example in which the solar cell composite display body 10 further includes a reflective layer 70. As shown in FIG. 13, the main body 40 has a side surface 40c extending between the first surface 40a and the second surface 40b, and a reflective layer 70 is provided on at least a part of the side surface 40c.

  The side surface 40c includes a pair of upper and lower side surfaces 40d and 40e opposed to the first axial direction d1, and a pair of lateral side surfaces 40f opposed to the second axial direction d2 (see also FIG. 1). The reflective layer 70 covers the entire area of the four surfaces 40d to 40f constituting the side surface 40c. As an example, such a reflective layer 70 can be formed of a thin film made of a material having a high reflectance.

  According to the reflective layer 70, sunlight incident on the solar cell composite display body 10 can be prevented from leaking from the side surface 40c of the main body 40, and can be returned so as to travel in the main body 40. Use efficiency can be increased.

<< Second Embodiment >>
Next, a second embodiment will be described with reference to FIG. FIG. 14 is a cross-sectional view showing the solar cell composite display body 10 according to the second embodiment. The second embodiment described with reference to FIG. 14 differs in the arrangement of the unit lenses 30, but the other configurations can be configured in the same manner as the first embodiment and its modifications. In the following description of the second embodiment and the drawings used in the following description, parts that can be configured in the same manner as in the above-described first embodiment and its modifications are described with respect to corresponding parts in the above-described form. The same reference numerals as those used are used, and redundant description is omitted.

  In the second embodiment shown in FIG. 14, the plurality of unit lenses 30 are arranged on the first surface 40 a of the main body 40, and the second surface 40 b of the main body 40 faces the solar cell panel 50. However, in the second embodiment, the uniaxial direction d1 that is the arrangement direction of the unit lenses 30 is along the vertical direction, but unlike the first embodiment, one side in the uniaxial direction d1 corresponds to the lower side. The other side in the uniaxial direction d1 corresponds to the upper side.

  The display element 11 is arranged along a part of the lens surface 31 of each unit lens 30. In the example illustrated in FIG. 8, the display element 11 is disposed so as to cover the one side region 32 a of the lens surface 31, and does not cover the other side region 32 b. As can be understood from FIG. 8, the one side region 32a is a solar cell along the normal direction nd of the main body portion 40 as it goes from the top portion 31c side to the one end portion 31a side along the first axial direction d1. Approach the panel 50. On the other hand, the other side region 32b approaches the solar cell panel 50 along the normal direction nd of the main body 40 as it goes from the top portion 31c side to the other end portion 31b side along the first axial direction d1.

  Each display element 11 has a display surface 12 for performing display on the surface facing the front surface 10a side. Since the display element 11 is disposed along the one side region 32a of the lens surface 31, the display surface 12 is also curved along the one side region 32a of the lens surface 31 correspondingly. More specifically, each display surface 12 corresponds to the shape of the one side region 32a of the lens surface 31, and one end portion 12a positioned on one side in the first axial direction d1 is on the other side in the first axial direction d1. It is curving so that it may approach the solar cell panel 50 in the normal line direction nd of the main-body part 40 rather than the other end part 12b located in this. As understood from FIG. 14, such a display surface 12 is easily visually recognized when observed from a direction D141 inclined to one side (downward) with respect to the normal direction nd.

  On the other hand, the light L143 incident on the solar cell composite display 10 from a direction different from the direction D141 in which the display surface 12 is easily visible, that is, on the other side (upper side) in the first axial direction d1 with respect to the normal direction nd. The light L 143 incident on the solar cell composite display body 10 from the inclined direction is difficult to be incident on the display surface 12. The light L143 that is difficult to be incident on the display surface 12 is incident mainly on the other side region 32b that is not covered with the display element 11, passes through the other side region 32b while being refracted by the lens action, and travels toward the solar cell panel 50. Go. As described above, the light L143 incident on the solar cell composite display 10 from a direction different from the direction D141 in which the display surface 12 is easily visible can be transmitted toward the solar cell panel 50, so that the display function and the power generation function can be achieved. It is possible to achieve both.

  As described above, according to the present embodiment, the sheet-like main body 40 having the first surface 40a and the second surface 40b facing the first surface 40a, and the first main body 40 along the uniaxial direction d1. A plurality of unit lenses 30 that form a lens surface 31 on a surface that faces the opposite side of the main body portion 40 and is arranged on one surface 40a, and a solar cell panel 50 that is disposed to face the second surface 40b of the main body portion 40. And a plurality of display surfaces 12 arranged along the uniaxial direction d1 on the lens surface 31 of the main body 40 or the unit lens 30, and the display surface 12 includes the uniaxial direction d1 and the normal direction nd of the main body 40. Are inclined with respect to the panel surface of the solar cell panel 50, and light incident on the solar cell composite display body 10 from the first angle range AR1 reaches the display surface 12 and is Second angle different from the angle range AR1 Light incident from enclosed AR2 to the solar cell composite display body 10 reaches the solar panel 50 passes between the unit lenses 30 and two display surfaces 12 adjacent. According to such a form, since the display surface 12 is inclined with respect to the panel surface of the solar battery panel 50, the inclined display surface 12 is easily observed from the direction D141 which is the front direction. On the other hand, the light beam L 143 incident on the solar cell composite display 10 from a direction different from the direction D 141 in which the display surface 12 can be easily viewed is transmitted between the two adjacent display surfaces 12 to the solar cell panel 50. Led. In this way, the difference between the observation direction D141 from the observer and the incident direction of the external light L143 is utilized to achieve harmony with the surrounding environment, and at the same time, display on the display surface 12 and power generation by the solar cell panel 50 are compatible. Is effectively possible. In addition, since the solar cell panel 50 is disposed to face the second surface 40b of the main body 40, the light receiving surface 50a of the solar cell panel 50 is not exposed to the outside. For this reason, the solar cell panel 50 can be made more inconspicuous.

  In addition, the unit lens 30 is a parallel light beam L143 incident on the solar cell composite display body 10 from within the second angle range AR2, and is a lens from a certain direction inclined with respect to the normal direction nd of the main body 40. The parallel light beam L143 incident on the surface 31 is transmitted at a higher transmittance than the parallel light beam L142 incident on the lens surface 31 from the direction along the normal direction nd of the main body 40. The solar cell composite display 10 is installed so that the ratio of the sunlight L142 and L143 incident on the lens surface 31 from a direction inclined with respect to the normal direction nd of the main body 40 when viewed as a whole increases. In this case, when viewed as a whole, the sunlight L143 incident on the lens surface 31 can be guided to the solar cell panel 50 with a relatively high transmittance, and the power generation amount of the solar cell panel 50 can be increased.

  Further, the unit lens 30 totally reflects a part of the parallel light beam L142 incident on the lens surface 31 from the direction along the normal direction nd of the main body 40. By designing the lens surface 31 like this, the lens surface 31 is made to transmit the sunlight L143 incident on the lens surface 31 from a direction inclined with respect to the normal direction nd of the main body portion 40 with high transmittance. Can be optimized. As a result, when viewed as a whole, the sunlight L143 incident on the lens surface 31 can be guided to the solar cell panel 50 with a relatively high transmittance, and the power generation amount of the solar cell panel 50 can be increased.

  Or according to this Embodiment, the sheet-like main-body part 40 which has the 2nd surface 40b which opposes the 1st surface 40a and the 1st surface 40a, and the 1st surface 40a of the main-body part 40 along uniaxial direction d1. A plurality of unit lenses 30 that form a lens surface 31 on a surface facing the opposite side of the main body 40, and a solar cell panel 50 that is disposed to face the second surface 40b of the main body 40, respectively. And a plurality of display surfaces 12 arranged along a part of the lens surface 31 of the unit lens 30 corresponding to the solar cell composite display body 10 is provided. According to such a form, since the some display surface 12 is arrange | positioned in the front surface of the solar cell panel 50, the solar cell panel 50 can be made not conspicuous. On the other hand, since each display surface 12 is disposed along a part of the corresponding lens surface 31, external light L142 and L143 that are not blocked by the display surface 12 adjust the traveling direction on the lens surface 31. It goes toward the solar cell panel 50 while being done. Thereby, the external lights L142 and L143 that are not blocked by the display surface 12 can be effectively used for power generation by the solar cell panel 50 while utilizing the lens effect. In this way, according to the present embodiment, the solar cell panel 50 is made inconspicuous so as to achieve harmony with the surrounding environment, and at the same time, both the display on the display surface 12 and the power generation by the solar cell panel 50 are achieved. Is possible. In addition, since the display surface 12 can be arranged on a part of the lens surface 31 of each unit lens 30, the solar cell composite display body 10 can be easily manufactured.

  In addition, according to the present embodiment, in the region of the lens surface 31 where the display surface 12 is disposed, the incident angle of the light L142 incident from the direction along the normal direction nd of the main body 40 is totally reflected. A region rs that is greater than the critical angle is included. According to such a configuration, the light incident on the lens surface 31 from the direction along the normal direction nd of the main body portion 40 is set in the region where the display surface 12 that blocks the light to be transmitted through the lens surface 31 is disposed. It is possible to correspond to the region rs that totally reflects L142. For this reason, the area | region which interrupts | blocks the light L142 which injects into the lens surface 31 from the direction along the normal line direction nd of the main-body part 40 can be suppressed to the minimum, and the effective use of sunlight L142 and L143 is aimed at as a whole. It becomes possible.

  Further, according to the present embodiment, each display surface 12 covers at least a part of the one side region 32 a of the lens surface 31 of the corresponding unit lens 30. In this case, the one-side region 32a is easily observed when the solar cell composite display body 10 is observed from the direction D141 inclined to one side in the uniaxial direction d1 with respect to the normal direction nd of the main body 40. Therefore, when the solar cell composite display 10 is observed from the direction D141 inclined to one side in the uniaxial direction d1, the display surface 12 arranged in the one-side region 32a can be easily seen.

  In particular, according to the present embodiment, each display surface 12 is displaced from the other side region 32 b of the lens surface 31 of the corresponding unit lens 30. In this case, light L133 from a direction inclined to the other side in the uniaxial direction d1 with respect to the normal direction nd of the main body portion 40 is likely to enter the other side region 32b. Therefore, by not arranging the display surface 12 in the other side region 32b, the light L133 incident on the solar cell composite display body 10 from the direction inclined to the other side in the uniaxial direction d1 can be easily guided to the solar cell panel 50. Thus, by utilizing the difference between the observation direction D131 from the observer and the incident direction of the external light L133, it is possible to further achieve both the display on the display surface 12 and the power generation by the solar cell panel 50.

  In particular, in the solar cell complex 10 according to the present embodiment, the uniaxial direction d1 that is the arrangement direction of the unit lenses 30 is along the vertical direction, one side in the uniaxial direction d1 corresponds to the lower side, and the other side in the uniaxial direction d1 is the upper side. It corresponds to. Such a method of installation is suitable for the case where the solar cell composite 10 is installed at a position higher than the line of sight in a use as a display plate assumed as a typical use. Since the observer observes the solar cell complex 10 while looking up to the upper side in the vertical direction, it is easy to visually recognize the display surface 12 arranged in the one side region 32a. On the other hand, although the incident direction of sunlight L143 changes according to the time zone and season, it enters the solar cell composite display 10 while proceeding in a direction inclined downward in the vertical direction. For this reason, even if the incident direction changes according to the time zone or season, the sunlight L143 is incident on the solar cell composite display body 10 from the direction inclined downward in the vertical direction and mainly transmits through the lens surface 31. To the solar cell panel 50. Therefore, according to such a form, the display by the display surface 12 and the electric power generation by the solar cell panel 50 can be effectively made compatible.

  Further, according to the present embodiment, in the cross section parallel to both the normal direction nd and the uniaxial direction d1 of the main body portion 40, the solar cell panel 50 has the parallel luminous flux incident along the optical axis od of the unit lens 30. It is arranged at a position farther from the unit lens 30 than the focal point fp at which L142 converges. According to such an arrangement, the parallel light beams L142 and L143 that are incident on the solar cell composite display 10 and directed toward the solar cell panel 50 reach the solar cell panel 50 in a state of being expanded after being condensed in the condensing region. To do. For this reason, it contributes to making the parallel light beams L142 and L143 incident on the solar cell complex 10 reach a wide region of the solar cell panel 50.

<< Third Embodiment >>
Next, a third embodiment will be described with reference to FIGS. 15 and 16. FIG.15 and FIG.16 is the perspective view and sectional drawing which respectively show the solar cell composite display body 10 in 3rd Embodiment. The third embodiment described with reference to FIGS. 15 and 16 differs in the arrangement of the display surface 12, but the other configurations can be configured in the same manner as in the first embodiment and its modifications. . In the following description of the third embodiment and the drawings used in the following description, parts that can be configured in the same manner as in the above-described first embodiment and its modifications are described with respect to corresponding parts in the above-described form. The same reference numerals as those used are used, and redundant description is omitted.

  As shown in FIGS. 15 and 16, the solar cell composite display 10 includes a sheet-like main body 40 and a solar cell panel 50 disposed to face the second surface 40 b of the main body 40. .

  On the first surface 40a of the main body 40, a plurality of unit lenses 30 are arranged in the first axial direction d1. The plurality of unit lenses 30 are arranged such that their optical axes od are parallel to each other. In particular, in the illustrated example, the unit lens 30 is disposed such that the optical axis od thereof is parallel to the normal direction nd of the solar cell composite display body 10. The first axial direction d1 is along the panel surface of the solar cell composite display body 10 and is orthogonal to the normal direction nd of the solar cell composite display body 10.

  The unit lens 30 constitutes a so-called lenticular lens or cylindrical lens. That is, each unit lens 30 extends linearly in a direction intersecting the first axis direction d1 that is the arrangement direction, more specifically in a second direction d2 orthogonal to the first axis direction d1. The unit lens 30 has a convex lens-like lens surface 31 formed on the surface facing the opposite side of the main body 40.

  A plurality of display surfaces 12 are arranged in the main body 40 along the first axial direction d1 corresponding to the unit lenses 30. As shown in FIG. 16, each display surface 12 is disposed so as to face at least partially the corresponding unit lens 30 along the normal direction nd. In the present embodiment, like the unit lens 30, the display surface 12 is in a direction intersecting the first axis direction d1 that is the arrangement direction, more strictly, in a second direction d2 orthogonal to the first axis direction d1. It extends in a straight line. Each display surface 12 is inclined with respect to the panel surface of the solar cell panel 50 and the normal direction nd of the main body 40.

  Next, the effect | action of the solar cell composite display body 10 by this Embodiment is demonstrated. For example, the solar cell composite display 10 is arranged such that the first axis direction d1 that is the arrangement direction of the unit lenses 30 is along the vertical direction. In addition, one end 12a located on one side of the display surface 12 in the first axial direction d1 is located on the upper side in the vertical direction, and the other end 12b located on the other side in the first axial direction d1 of the display surface 12. The solar cell composite display body 10 is disposed so as to be positioned on the lower side in the vertical direction.

  As well shown in FIG. 16, the inclined display surface 12 is easily visible from the front direction of the display surface 12. In the present embodiment, since the display surface 12 is inclined to one side in the first axial direction d1 with respect to the optical axis od of the unit lens 30, the other side in the first axial direction d1 with respect to the optical axis od. When the solar cell composite display 10 is observed from the directions D161 and D162 inclined in the direction, the display surface 12 is easily visible. In particular, even when the solar cell composite display 10 is observed from the direction D162 that is largely inclined to the other side in the first axial direction d1 with respect to the optical axis od, the light is incident due to the condensing action of the lens surface 31. The display surface 12 facing the unit lens 30 can be observed. If a plurality of display surfaces 12 are arranged on the second surface 40b of the main body 40 along the second surface 40b, as shown by a dotted line in FIG. The display surface 12 facing the unit lens 30 may be observed, and the intended display function may not be exhibited. That is, by tilting the display surface 12 with respect to the panel surface of the solar battery panel 50, the first angle range AR1 serving as a viewing angle at which the display surface 12 is observed, in other words, emission of light from the display surface 12 is displayed. The first angle range AR1 that is the angle range of the direction can be adjusted with a high degree of freedom.

  On the other hand, the light flux L164 that travels in the main body 40 from the direction in which the angle formed with respect to the display surface 12 is smaller is less likely to be received by the display surface 12. Therefore, the light beam L164 directed to the solar cell panel 50 without being interrupted by the inclined display surface 12 is inclined in the direction opposite to the directions D161 and D162 in which the display surface 12 can be effectively observed, as shown in FIG. Light flux L164. That is, light that enters the unit lens 30 while traveling to the other side in the first axial direction d1, in the illustrated example, a light beam L164 that enters the unit lens 30 while traveling downward in the vertical direction is between the two display surfaces 12. It becomes easy to be guided to the solar cell panel 50 through the region 60.

  As described above, according to the present embodiment, the sheet-like main body 40 having the first surface 40a and the second surface 40b facing the first surface 40a, and the first main body 40 along the uniaxial direction d1. A plurality of unit lenses 30 that form a lens surface 31 on a surface that faces the opposite side of the main body portion 40 and is arranged on one surface 40a, and a solar cell panel 50 that is disposed to face the second surface 40b of the main body portion 40. And a plurality of display surfaces 12 arranged along the uniaxial direction d1 on the lens surface 31 of the main body 40 or the unit lens 30, and the display surface 12 includes the uniaxial direction d1 and the normal direction nd of the main body 40. Are inclined with respect to the panel surface of the solar cell panel 50, and light incident on the solar cell composite display body 10 from the first angle range AR1 reaches the display surface 12 and is Second angle different from the angle range AR1 Light incident from enclosed AR2 to the solar cell composite display body 10 reaches the solar panel 50 passes between the unit lenses 30 and two display surfaces 12 adjacent. According to such a form, since the display surface 12 is inclined with respect to the panel surface of the solar battery panel 50, the inclined display surface 12 is easily observed from the directions D161 and D162 which are the front directions. On the other hand, the light beam L164 incident on the solar cell composite display body 10 from a direction different from the directions D161 and D162 in which the display surface 12 is easily visible can be transmitted between the two adjacent display surfaces 12 and the solar cell panel. To 50. As described above, the difference between the observation directions D161 and D162 from the observer and the incident direction of the external light L164 is used to achieve harmony with the surrounding environment, and display on the display surface 12 and power generation by the solar cell panel 50. Can be effectively achieved. In addition, since the solar cell panel 50 is disposed to face the second surface 40b of the main body 40, the light receiving surface 50a of the solar cell panel 50 is not exposed to the outside. For this reason, the solar cell panel 50 can be made more inconspicuous.

  In addition, the unit lens 30 is a parallel light beam L164 that is incident on the solar cell composite display body 10 from within the second angle range AR2, and is a lens from a certain direction that is inclined with respect to the normal direction nd of the main body 40. The parallel light beam L164 incident on the surface 31 is transmitted with a higher transmittance than the parallel light beam L163 incident on the lens surface 31 from the direction along the normal direction nd of the main body 40. The solar cell composite display 10 is installed so that the ratio of the sunlight L163 and L164 incident on the lens surface 31 from the direction inclined with respect to the normal direction nd of the main body 40 when viewed as a whole increases. In this case, when viewed as a whole, the sunlight L164 incident on the lens surface 31 can be guided to the solar cell panel 50 with a relatively high transmittance, and the power generation amount of the solar cell panel 50 can be increased.

  Further, the unit lens 30 totally reflects a part of the parallel light beam L163 that enters the lens surface 31 from the direction along the normal direction nd of the main body 40. By designing the lens surface 31 like this, the lens surface 31 is made to transmit the sunlight L164 incident on the lens surface 31 from a direction inclined with respect to the normal direction nd of the main body 40 with high transmittance. Can be optimized. As a result, when viewed as a whole, sunlight L164 incident on the lens surface 31 can be guided to the solar cell panel 50 with a relatively high transmittance, and the power generation amount of the solar cell panel 50 can be increased.

  Also, in the present embodiment, as shown in FIG. 16, each display surface 12 has one end 12a located on one side in the first axial direction d1 and the other end located on the other side in the first axial direction d1. It inclines with respect to the panel surface of the said solar cell panel 50 so that it may approach the unit lens 30 in the normal line direction nd of the main-body part 40 rather than the part 12b. Since the display surface 12 is easily observed from the front direction of the display surface 12, the display surface 12 is easily visually recognized from the directions D161 and D162 inclined to the other side in the first axial direction d1 with respect to the normal direction of the solar cell panel 50. On the other hand, the light flux L164 from the direction inclined to one side in the first axial direction d1 with respect to the normal direction of the solar cell panel 50 travels in the main body 40 from the direction in which the angle formed with the display surface 12 is small. Hard to be blocked by the display surface 12. Light from a direction inclined to one side in the first axial direction d1 with respect to the normal direction of the solar cell panel 50, which is not easily blocked by the display surface 12, in other words, the sun while proceeding to the other side in the first axial direction d1 The light beam L164 incident on the battery-combined display 10 is easily received by the solar cell panel 50 through the light transmission region 60.

  That is, according to the above embodiment, the first angle range AR1 that is the angle range in the direction in which the display function from the display surface 12 is developed, and the power generation function of the solar cell panel 50 are exhibited. The second angle range AR2, which is the angle range of the direction, is easily distinguished from the normal direction nd of the main body 40. In other words, the first angle range AR1 and the second angle range AR2 are difficult to overlap. Thereby, the first angle range AR1 and the second angle range AR2 can each be effectively widened.

  As described above, if the overlap between the first angle range AR1 and the second angle range AR2 is reduced, and if the first angle range AR1 and the second angle range AR2 can be further separated from each other, The display function and the power generation function of the solar battery panel 50 are more effectively exhibited without adversely affecting each other. In the present embodiment, it is possible to suppress the solar cell panel 50 from being observed together with the display target 13 while observing the display target 13 given to the display surface 12. In this case, the visibility of the display target 13 and the design of the display target 13 can be improved.

  In particular, in the solar cell composite display body 10 according to the present embodiment, the second angle range AR2 that is the angle range of the incident direction to the solar cell composite display body 10 that is guided to the solar cell panel 50 is set in the vertical direction. The first angle range AR1 in which the display function from the display surface 12 is expressed is set in the direction inclined downward in the vertical direction. In this case, it is suitable for the case where the solar cell composite display 10 is installed at a position higher than the line of sight in a use as a display plate assumed as a typical use. The observer can observe the display object 13 given to the display surface 12 from the first angle range AR1 in the direction of looking up, in order to observe the solar cell composite display 10 while looking up to the upper side in the vertical direction. it can. On the other hand, although the incident direction of sunlight changes according to the time zone and season, it is incident on the unit shape element 30 while proceeding in a direction inclined downward in the vertical direction or in a substantially horizontal direction. For this reason, even if the incident direction changes according to the time zone and the season, the sunlight enters the lens surface 31 from the second angle range AR2 that is inclined downward and travels toward the solar cell panel 50. Can do. Therefore, according to such a form, it is possible to effectively balance solar power generation and display of the display target 13.

  In addition, although the some modification with respect to embodiment mentioned above was demonstrated above, naturally, it is also possible to apply combining several modifications suitably.

DESCRIPTION OF SYMBOLS 10 Solar cell composite type display body 10a Front surface 10b Back surface 12 Display surface 13 Display target 30 Unit lens 31 Lens surface 40 Main body part 40a First surface 40b Second surface 50 Solar cell panel 50a Light-receiving surface

Claims (8)

A sheet-like main body having a first surface and a second surface facing the first surface;
A plurality of unit lenses that are arranged on the second surface of the main body along the uniaxial direction and form a lens surface on a surface facing the opposite side of the main body;
A solar cell panel disposed to face the second surface of the main body in which the plurality of unit lenses are arranged;
A plurality of display surfaces arranged along the uniaxial direction on the lens surface of the main body or the unit lens;
A solar cell composite display comprising:
The display surface is inclined with respect to the panel surface of the solar cell panel in a main cut surface parallel to both the uniaxial direction and the normal direction of the main body part,
Light incident on the solar cell composite display body from the first angle range reaches the display surface, and light incident on the solar cell composite display body from a second angle range different from the first angle range, Passing between the unit lens and two adjacent display surfaces to reach the solar cell panel,
The unit lens is a parallel light beam incident on the solar cell composite display body from the second angle range, and is incident on the lens surface from a certain direction inclined with respect to the normal direction of the main body. A solar cell composite display that transmits a parallel light beam with a higher transmittance than a parallel light beam that is incident on the lens surface from a direction along a normal direction of the main body. A sheet-like main body having a first surface and a second surface facing the first surface;
A plurality of unit lenses that are arranged on the second surface of the main body along the uniaxial direction and form a lens surface on a surface facing the opposite side of the main body;
A solar cell panel disposed to face the second surface of the main body in which the plurality of unit lenses are arranged;
A plurality of display surfaces arranged along the uniaxial direction on the lens surface of the main body or the unit lens;
A solar cell composite display comprising:
The display surface is inclined with respect to the panel surface of the solar cell panel in a main cut surface parallel to both the uniaxial direction and the normal direction of the main body part,
Light incident on the solar cell composite display body from the first angle range reaches the display surface, and light incident on the solar cell composite display body from a second angle range different from the first angle range, Passing between the unit lens and two adjacent display surfaces to reach the solar cell panel,
The unit lens is a solar cell composite display body that totally reflects a part of a parallel light beam incident on the lens surface from a direction along a normal direction of the main body. A sheet-like main body having a first surface and a second surface facing the first surface;
A plurality of unit lenses that are arranged on the second surface of the main body along the uniaxial direction and form a lens surface on a surface facing the opposite side of the main body;
A solar cell panel disposed to face the second surface of the main body in which the plurality of unit lenses are arranged;
A plurality of display surfaces arranged along a part of the lens surface of the unit lens corresponding to each;
With
The region of the lens surface where the display surface is disposed includes a region in which an incident angle of light incident from a direction along a normal direction of the main body portion is equal to or greater than a total reflection critical angle. Composite display. A sheet-like main body having a first surface and a second surface facing the first surface;
A plurality of unit lenses that are arranged on the first surface of the main body along the uniaxial direction and form a lens surface on a surface facing the opposite side of the main body;
A solar cell panel disposed opposite to the second surface of the main body,
A plurality of display surfaces arranged along the uniaxial direction on the lens surface of the main body or the unit lens;
A solar cell composite display comprising:
The display surface is inclined with respect to the panel surface of the solar cell panel in a main cut surface parallel to both the uniaxial direction and the normal direction of the main body part,
Light incident on the solar cell composite display body from the first angle range reaches the display surface, and light incident on the solar cell composite display body from a second angle range different from the first angle range, Passing between the unit lens and two adjacent display surfaces to reach the solar cell panel,
The unit lens is a parallel light beam incident on the solar cell composite display body from the second angle range, and is incident on the lens surface from a certain direction inclined with respect to the normal direction of the main body. A solar cell composite display that transmits a parallel light beam with a higher transmittance than a parallel light beam that is incident on the lens surface from a direction along a normal direction of the main body. A sheet-like main body having a first surface and a second surface facing the first surface;
A plurality of unit lenses that are arranged on the first surface of the main body along the uniaxial direction and form a lens surface on a surface facing the opposite side of the main body;
A solar cell panel disposed opposite to the second surface of the main body,
A plurality of display surfaces arranged along the uniaxial direction on the lens surface of the main body or the unit lens;
A solar cell composite display comprising:
The display surface is inclined with respect to the panel surface of the solar cell panel in a main cut surface parallel to both the uniaxial direction and the normal direction of the main body part,
Light incident on the solar cell composite display body from the first angle range reaches the display surface, and light incident on the solar cell composite display body from a second angle range different from the first angle range, Passing between the unit lens and two adjacent display surfaces to reach the solar cell panel,
The unit lens is a solar cell composite display body that totally reflects a part of a parallel light beam incident on the lens surface from a direction along a normal direction of the main body. A sheet-like main body having a first surface and a second surface facing the first surface;
A plurality of unit lenses that are arranged on the first surface of the main body along the uniaxial direction and form a lens surface on a surface facing the opposite side of the main body;
A solar cell panel disposed opposite to the second surface of the main body,
A plurality of display surfaces arranged along a part of the lens surface of the unit lens corresponding to each;
With
The region of the lens surface where the display surface is disposed includes a region in which an incident angle of light incident from a direction along a normal direction of the main body portion is equal to or greater than a total reflection critical angle. Composite display. The main body has a side surface extending between the first surface and the second surface;
The solar cell composite display according to any one of claims 1 to 6, wherein a reflective layer is provided on the side surface of the main body.   The display target element is given to each display surface, and the display target is formed by a combination of the display target elements. The solar cell composite display according to any one of claims 1 to 7.

Images