JP6414726B2 - Panel material - Google Patents

Description

  The present invention relates to a panel member capable of guiding light incident from a certain direction to a first optical functional surface and guiding light incident from another direction different from the certain direction to a second optical functional surface.

  As a typical example of such a panel member, a display medium whose surface to be observed changes between the first optical functional surface and the second optical functional surface according to the observation direction of the panel member is exemplified (for example, a patent) Reference 1). In this panel member, for example, the first and second optical functional surfaces form a pattern forming surface on which different patterns are formed. The observer can observe different patterns given to the first and second optical functional surfaces according to the observation direction in which the panel member is observed.

  As shown in FIG. 13, in this panel member 1010, a plurality of unit lenses 130 are provided, and a region facing each unit lens 130 is divided into a first optical functional surface 111 and a second optical functional surface 112. . In the example shown in FIG. 13, the boundary between the first optical functional surface 111 and the second optical functional surface 112 is disposed at a position that becomes the focal point fp of the unit lens 130 with respect to the light L151 from the optical axis direction od. Then, in the observation from the direction inclined to one side (upper side in FIG. 13) from the normal direction of the panel member 1010, the pattern displayed by the first optical functional surface 111 is observed (see the light L152 in FIG. 13). In the observation from the direction inclined from the normal direction to the other side of the panel member, the pattern displayed by the second optical functional surface 112 is observed.

JP 2000-131783 A

  Such a panel member is generally produced using a transparent resin. And the refractive index of the cheap resin material generally used is about 1.40-1.60. Therefore, the light traveling direction cannot be greatly bent due to refraction at the lens surface of the unit lens. For this reason, the light L153 traveling in a direction inclined about 30 ° to one side from the normal direction of the panel member is refracted by the lens surface of the unit lens 130 and then faces another unit lens adjacent to the unit lens. 2 is incident on the optical function surface 112. Further, the light L154 traveling in the direction inclined further to the one side proceeds in the direction inclined more greatly even inside the panel member, and at the first optical functional surface 111 facing another unit lens, or at a further distant position. It is incident on a certain optical function surface. That is, in the conventional panel member, it is not possible to ensure a large angle range in which the optical function from the first optical function surface or the optical function from the second optical function surface is continuously expressed.

  In such a panel member, for example, when the optical functional surface forms a pattern formation surface, the pattern cannot be observed with a wide viewing angle. Therefore, it is difficult to use this panel member for general purposes as a medium for displaying a pattern, information, and the like. In addition, this panel member is used in an application in which the incident direction of incident light to the panel member is greatly changed, for example, an application in which sunlight is received and a desired optical function is expressed like a light receiving panel for a solar cell. Since the incident direction of sunlight on the panel member varies greatly with time and season due to the rotation and revolution of the earth, the panel member of FIG. 13 cannot be used efficiently or effectively.

  The present invention has been made in consideration of the above points, and provides a panel member capable of adjusting an angular range in which optical functions from each optical functional surface are continuously expressed with a high degree of freedom. For the purpose.

The first panel member according to the present invention includes a plurality of unit lenses arranged in at least one axial direction, a sheet-like main body portion on which the plurality of unit lenses are disposed, and the plurality of unit lenses. A light control sheet comprising: a plurality of first optical functional surfaces disposed in the main body; and a plurality of second optical functional surfaces disposed in the main body so as to face the plurality of unit lenses. ,
The first optical function surface is inclined with respect to a sheet surface of the light control sheet;
The second optical functional surface is inclined at an angle different from the first optical functional surface with respect to a sheet surface of the light control sheet;
The unit lens guides light incident from a certain direction to the first optical functional surface, and guides light incident from another direction different from the certain direction to the second optical functional surface.

In the first panel member according to the present invention, the first optical functional surface arranged corresponding to each unit lens is one in the uniaxial direction than the second optical functional surface arranged corresponding to the unit lens. Placed on the side
Each first optical functional surface has an end portion located on one side in the uniaxial direction so as to be closer to the unit lens in the normal direction of the panel member than an end portion located on the other side in the uniaxial direction. , Inclined with respect to the sheet surface of the light control sheet,
Each of the second optical functional surfaces has an end located on the other side in the uniaxial direction so as to be closer to the unit lens in the normal direction of the panel member than an end located on the one side in the uniaxial direction. The light control sheet may be inclined with respect to the sheet surface.

The second panel member according to the present invention includes a plurality of unit lenses arranged in at least one axial direction,
A plurality of first optical functional surfaces arranged to face the plurality of unit lenses;
A plurality of second optical functional surfaces disposed to face the plurality of unit lenses;
With
The first optical functional surface disposed to face a certain unit lens is disposed on one side in the uniaxial direction from the second optical functional surface disposed to face the unit lens.
The unit located on one side in the uniaxial direction of the first optical functional surface has the unit in the normal direction of the panel member more than the end located on the other side in the uniaxial direction of the first optical functional surface. Close to the lens,
The unit located on the other side in the uniaxial direction of the second optical functional surface has the unit in the normal direction of the panel member than the end located on the one side in the uniaxial direction of the second optical functional surface. Close to the lens,
The unit lens guides light incident from a certain direction to the first optical functional surface, and guides light incident from another direction different from the certain direction to the second optical functional surface.

  In the first or second panel member according to the present invention, the unit lens guides light incident from a direction inclined to the other side with respect to the normal direction of the panel member to the first optical function surface, and the panel. Light incident from a direction inclined to one side with respect to the normal direction of the member may be guided to the second optical function surface.

  1st or 2nd panel member by this invention WHEREIN: The edge part located in one side in the said uniaxial direction of the said 1st optical function surface, The edge located in the other side in the said uniaxial direction of the said 2nd optical function surface Between the end portion located on the other side in the uniaxial direction of the first optical functional surface and the end portion located on the one side in the uniaxial direction of the second optical functional surface. It may be wider than the interval between them.

  In the first or second panel member according to the present invention, an interval along the uniaxial direction between each position on the first optical functional surface and the corresponding second optical functional surface is on the first optical functional surface. The position may be narrower as the distance from the unit lens increases along the normal direction of the panel member.

  The 1st or 2nd panel member by this invention WHEREIN: The edge part located in the other side in the said uniaxial direction of the said 1st optical function surface is an edge located in one side in the said uniaxial direction of the said 2nd optical function surface. It may be connected to the department.

  In the first or second panel member according to the present invention, an end portion located on one side in the uniaxial direction of the first optical functional surface is adjacent to the first optical functional surface on one side in the uniaxial direction. You may connect with the edge part located in the other side in the said uniaxial direction of a 2nd optical function surface.

  In the first or second panel member according to the present invention, the first optical functional surface may be a display surface for performing display.

  In the first or second panel member according to the present invention, a display target element may be provided to each first optical function surface, and a display target may be formed by a combination of the display target elements.

  The 1st or 2nd panel member by this invention WHEREIN: A solar cell panel is provided facing the said 2nd optical function surface, and the said 2nd optical function surface comprises the light-incidence surface of the said solar cell panel. Also good.

  In the first or second panel member according to the present invention, the plurality of unit lenses are disposed apart from each other in the uniaxial direction, and together with the unit lenses between two unit lenses adjacent in the uniaxial direction. A connection surface forming the surface of the panel member may be provided.

  In the first or second panel member according to the present invention, each unit lens may extend linearly in a direction intersecting the uniaxial direction.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to adjust the angle range from which the optical function from each optical function surface will be expressed continuously with a high freedom degree.

FIG. 1 is a perspective view showing a panel member for explaining an embodiment according to the present invention. FIG. 2 is a cross-sectional view taken along the line II-II in FIG. FIG. 3 is a diagram for explaining the optical function of the first optical functional surface of the panel member. FIG. 4 is a diagram for explaining the optical function of the first optical functional surface in the same cross section as FIG. FIG. 5 is a diagram for explaining the optical function of the second optical function surface in the same cross section as FIG. FIG. 6 is a diagram for explaining a method for manufacturing a panel member. FIG. 7 is a diagram for explaining a method for manufacturing a panel member. FIG. 8 is a diagram for explaining a method for manufacturing a panel member. FIG. 9 is a diagram for explaining a method for manufacturing a panel member. FIG. 10 is a diagram corresponding to FIG. 2, and is a cross-sectional view illustrating another arrangement example of the connection region between the first optical functional surface and the second optical functional surface. FIG. 11 is a cross-sectional view corresponding to FIG. 2 and showing still another arrangement example of the connection region between the first optical functional surface and the second optical functional surface. FIG. 12 is a diagram corresponding to FIG. 2, and is a cross-sectional view showing still another arrangement example of the connection region between the first optical functional surface and the second optical functional surface. FIG. 13 is a longitudinal sectional view showing a conventional panel member.

  Hereinafter, an embodiment of the present invention 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.

  1 to 9 are diagrams for explaining an embodiment of the present invention. 1 and 2 are perspective views or longitudinal sectional views showing the panel member 10, and FIGS. 3 to 5 are diagrams for explaining optical functions expressed by the panel member 10, and FIGS. FIG. 9 is a diagram for explaining an example of a method for manufacturing a panel member.

  The panel member 10 described here is a panel-like member including a first optical functional surface 11 and a second optical functional surface 12 that are expected to exhibit some optical function. The optical function surface is a flat surface or a curved surface having a function utilizing the action or property of light, or a surface combining these. Light means not only visible light but also infrared rays to ultraviolet rays. Examples of the action and properties of light include straight light propagation, refraction, reflection, absorption, light emission, interference, and polarization. Examples of the optical function include a display function, an illumination function, a light shielding function, and an optical connection function with a solar cell, an optical element, an optical member, or an optical device. As shown in FIGS. 1 and 2, the panel member 10 includes a plurality of unit lenses 30 arranged in the first axial direction d1. The unit lens 30 expresses a lens function with respect to light incident on the panel member 10 or light emitted from the panel member 10, and adjusts the traveling direction of the light. The unit lens 30 guides light incident from a direction within a certain angle range AR1 to the first optical function surface 11, and guides light incident from a direction within a certain angle range AR2 to the second optical function surface 12. That is, the unit lens 30 refracts the light from the first optical function surface 11 and emits the light in the direction within the first angle range AR1, and refracts the light from the second optical function surface 12 to refract the second angle range AR2. The light is emitted in the inner direction.

  That is, the first optical function surface 11 has some optical function for light incident on the panel member 10 from the first angle range AR1 or for light emitted from the panel member 10 toward the first angle range AR1. Demonstrate. The second optical function surface 12 has some optical function for light incident on the panel member 10 from the second angle range AR2 or for light emitted from the panel member 10 toward the second angle range AR2. Demonstrate.

  And in the panel member 10 demonstrated here, the angle range in which the optical function from each optical function surface 11 and 12 is expressed continuously, ie, 1st angle range AR1 and 2nd angle range AR2, is shown. A device has been devised to enable adjustment with a high degree of freedom. As a result, the optical functions of the optical function surfaces 11 and 12 are stably exhibited, and the panel member 10 functions effectively.

  In one embodiment described in detail below, as an example, the first optical function surface 11 forms a display surface for displaying the display target 13 as an example. Therefore, the light emitted from the panel member 10 toward the first angle range AR1 displays the display target 13. That is, the observer can observe the display object 13 from the first angle range AR1. Examples of the display target 13 include graphics (patterns) such as graphics, patterns, designs, colors, pictures, photographs, and characters, and information such as letters, marks, and numbers. The display target 13 may be stationary or moving. Here, the light incident on the panel member 10 is reflected by the first optical functional surface 11 or a display element connected thereto, the traveling direction is adjusted by the unit lens 30, and the panel is directed toward the first angle range AR1. The light is emitted from the member 10. Alternatively, when the first optical functional surface 11 or a display element connected thereto emits light, the traveling direction of the light emitted from the first optical functional surface 11 is adjusted by the unit lens 30, and the first angular range AR1. The light is emitted from the panel member 10 toward the front.

  The second optical functional surface 12 functions as the light incident surface 50 a of the solar cell panel 50. That is, the light incident on the panel member 10 from the second angle range AR2 is adjusted in the traveling direction by the unit lens 30 and enters the solar cell panel 50 via the second optical function surface 12 as the light incident surface 50a. Used for power generation. However, the present invention is not limited to the embodiment described in detail below, and the optical function by the first optical functional surface 11 and the optical function by the second optical functional surface 12 can be appropriately changed. .

  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 panel member 10, the sheet surface of the light control sheet 20 described later, the sheet surface of the main body 40 described later of the light control sheet 20, the panel surface of the solar cell panel 50, and The light incident surfaces 50a of the solar cell panels 50 are parallel to each other. 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.

  Hereinafter, the configuration and operational effects of the panel member 10 according to the present embodiment will be described in detail. As well shown in FIGS. 1 and 2, the panel member 10 includes a light control sheet 20 having a sheet-like main body portion 40 and a lens portion 25 supported on the main body portion 40. . The light control sheet 20 forms the front surface 10 a and the back surface 10 b of the panel member 10. The surface 10 a forms an incident surface for external light such as sunlight that enters the panel member 10. Further, the surface 10 a forms an emission surface from which light from the first optical functional surface 11 that visualizes the display target 13 is emitted from the panel member 10.

  The lens unit 25 located on the surface 10a side of the panel member 10 includes a large number of unit lenses 30 arranged in the first axial direction d1. A large number 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 arranged such that the optical axis od thereof is parallel to the normal direction nd of the panel member 10. The first axial direction d1 is along the panel surface of the panel member 10 and is orthogonal to the normal direction nd of the panel member 10. In the illustrated example, the panel member 10 is disposed such that the first axial direction d1 is parallel to the vertical direction.

  As shown in FIG. 1, the lens unit 25 constitutes a so-called lenticular lens or cylindrical lens. 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 plurality of unit lenses 30 included in the lens unit 25 are configured identically to each other.

  Each unit lens 30 has a convex lens-like lens surface 31 and protrudes from the sheet-like main body 40 toward the normal direction nd of the panel member. The lens surface 31 forms the surface 10 a of the panel member 10. In the cross section of FIG. 2 parallel to both the first axial direction d1 and the normal direction nd (hereinafter also referred to as “main cut surface”), the lens 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 on the focal point fp. The focal point fp shown in FIG. 2 is a focal point for the parallel light L21 incident along the optical axis od of the unit lens 30, and is thus located on the optical axis od of the unit lens 30.

  In the illustrated example, the unit lenses 30 are arranged in the first axial direction d1 with a gap therebetween. That is, a connection surface 38 is provided between the lens surfaces 31 of the two unit lenses 30 adjacent to each other in the first axial direction d1 to connect the base end portions 32b facing each other. In the illustrated example, the connection surface 38 extends along the panel surface of the panel member 10. The surface 10 a of the panel member 10 is formed by the lens surface 31 and the connection surface 38 of the unit lens 30. For example, the light control sheet 20 including the unit lens 30 can be manufactured by resin molding using a mold. By providing the connecting surface 38 and providing a gap between the adjacent unit lenses 30, before the light from the angle range greatly inclined with respect to the normal direction nd enters the unit lens 30, the adjacent unit lens The problem of being interrupted by 30, so-called “vignetting” can be reduced.

  The main body 40 has a first main surface 40a and a second main surface 40b as a pair of main surfaces facing each other. The first main surface 40 a forms a surface adjacent to the lens portion 25, and the second main surface 40 b forms the back surface 10 b of the panel member 10. The first optical functional surface 11 and the second optical functional surface 12 are disposed inside the main body 40. The plurality of first optical functional surfaces 11 and the plurality of second optical functional surfaces 12 are arranged in the first axial direction d1 corresponding to the unit lenses 30 as the arrangement direction of the unit lenses 30. Corresponding to one unit lens 30, one first optical functional surface 11 and one second optical functional surface 12 are arranged. The first optical functional surface 11 disposed corresponding to each unit lens 30 is disposed on one side in the first axial direction d1 relative to the second optical functional surface 12 disposed corresponding to the unit lens 30. ing. Therefore, the first optical functional surface 11 and the second optical functional surface 12 are alternately arranged along the first axial direction d1. Note that the unit lens 30 and the first optical functional surface 11 and the unit lens 30 and the second optical functional surface 12 do not always need to be arranged one-on-one.

  Each first optical functional surface 11 is positioned to face one unit lens 30 to which the first optical functional surface 11 corresponds. As shown in FIG. 2, each first optical functional surface 11 is disposed so as to face at least partially the corresponding unit lens 30 along the normal direction nd. In other words, each first optical functional surface 11 at least partially overlaps the corresponding unit lens 30 when viewed from the normal direction nd. In the present embodiment, like the unit lens 30, the first optical functional surface 11 extends linearly in a direction that intersects the first axial direction d1 that is the arrangement direction. More precisely, like the unit lens 30, the first optical functional surface 11 extends linearly in a second axial direction d2 orthogonal to the first axial direction d1. In the illustrated example, a large number of first optical functional surfaces 11 provided corresponding to the unit lenses 30 are configured identically.

  Each first optical functional surface 11 is inclined with respect to the sheet surface of the light control sheet 20, in other words, the panel surface of the panel member 10, and is also inclined with respect to a direction parallel to the optical axis od of the unit lens 30. Yes. That is, each first optical function surface 11 is not parallel to both the sheet surface of the light control sheet 20 and the optical axis od of the unit lens 30. According to such a first optical function surface 11, as will be described later, the first angle range AR1 that is an angle range in which the optical function from the first optical function surface 11 is expressed can be obtained with a high degree of freedom. It becomes possible to adjust.

  As shown in FIG. 2, each first optical functional surface 11 has one end portion 11 a located on one side in the first axial direction d <b> 1 (in the illustrated example, the upper side in FIG. 2 and the upper side in the vertical direction). The unit in the normal direction nd of the panel member 10 is more than the other end portion 11b located on the other side in the first axial direction d1 (the lower side in FIG. 2 and the lower side in the vertical direction in the illustrated example). The light control sheet 20 is inclined with respect to the sheet surface so as to be close to the lens 30. Therefore, the one end portion 11 a of the first optical functional surface 11 is closer to the unit lens 30 in the normal direction nd of the panel member than the other end portion 11 b of the first optical functional surface 11. As can be understood from FIG. 2, light from an angle range inclined to the other side (downward) with respect to the normal direction nd is easily incident on the first optical functional surface 11. Therefore, the optical function from the first optical function surface 11 is effectively exerted toward an angle range inclined to the other side (downward) with respect to the normal direction nd.

  From the viewpoint of strengthening such a tendency, the first optical functional surface 11 is stepwise from the one side (upper side) to the other side (lower side) in the first axial direction d1 in the main cut surface of the panel member. Alternatively, it is preferable that the distance from the unit lens 30 is continuously in the normal direction nd of the panel member. In the illustrated example, the first optical functional surface 11 is formed as a flat surface. And in the main cut surface of the panel member shown in FIG. 2, the first optical functional surface 11 is a panel having a constant inclination from one side to the other side in the first axial direction d1. It moves away from the unit lens 30 along the normal direction nd of the member. According to the first optical function surface 11 as described above, the optical function from the first optical function surface 11 is effectively exhibited toward an angle range inclined to the other side with respect to the normal direction nd. become.

  In the illustrated embodiment, in the main cutting surface of the panel member shown in FIG. 2, the other end portion 11 b that is an end portion on the other side (lower side) of the first optical function surface 11 in the first axial direction d1. Is located at the same position in the first axial direction d1 as the tip 32a of the lens surface 31 of the unit lens 30 corresponding to the first optical function surface 11. Further, in the main cut surface of the panel member shown in FIG. 2, one end portion 11a that is one end (upper side) end portion of the first optical functional surface 11 in the first axial direction d1 is the first optical functional surface. 11 is located on one side in the first axial direction d1 with respect to the base end portion 32b on one side in the first axial direction d1 of the lens surface 31 of the unit lens 30 corresponding to 11.

  In the illustrated embodiment, as described above, the first optical function surface 11 forms a display surface for displaying the display target 13. Therefore, the light emitted from the panel member 10 toward the first angle range AR1 makes the display target 13 visible. That is, the first optical functional surface 11 is visually recognized from the first angle range AR1, and as a result, the display target 13 formed on the first optical functional surface 11 can be observed. In addition, when displaying the display object 13 which moves by the 1st optical function surface 11, it is easy to use the electricity generated from the solar cell panel 50 adjacent to the 2nd optical function surface 12 for a drive.

  FIG. 3 shows an example of the display target 13 formed on the first optical function surface 11. A plurality of first optical functional surfaces 11 are arranged in the first axial direction d1, and each first optical functional surface 11 extends linearly in a second axial direction d2 orthogonal to the first axial direction d1. . Therefore, the first optical functional surface 11 located at each position in the first axial direction d1 is provided with the display target element 13a corresponding to the position of the first optical functional surface 11 in the first axial direction d1, The two-dimensional display target 13 can be displayed as a combination of display target elements 13a formed on the first optical functional surfaces 11 that are elongated in the second axial direction d2. In the example shown in FIG. 3, the capital letter “N” of the alphabet is displayed as the display target 13. As described above, since the display target 13 is displayed as a combination of the plurality of display target elements 13a, the sizes of the first optical functional surfaces 11 and the unit lenses 30 can be reduced. Even if the size of the member 10 is increased, a better display object 13 can be observed.

  As described above, the panel member 10 of the present embodiment can adjust the angular range in which the display target 13 is continuously displayed with a high degree of freedom. Therefore, the panel member 10 of this Embodiment can be used for various uses, for example, the large-sized panel use of several m-several dozen m size used with an outdoor signboard, a road information bulletin board, the outer wall surface of a building, etc. Examples include medium-sized panel applications of several tens of centimeters to several meters in size used for posters, signs, and inner walls of buildings, and small panel applications of several centimeters to several tens of centimeters used in table lamps, portable terminals, etc. can do.

  On the other hand, each second optical functional surface 12 is positioned to face one unit lens 30 to which the second optical functional surface 12 corresponds. As shown in FIG. 2, each second optical functional surface 12 is arranged so as to face at least partially the corresponding unit lens 30 along the normal direction nd. In other words, each second optical functional surface 12 overlaps at least partially with the corresponding unit lens 30 when viewed from the normal direction nd. In the present embodiment, like the unit lenses 30, the second optical functional surface 12 extends linearly in a direction that intersects the first axial direction d1 that is the arrangement direction. More precisely, like the unit lens 30, the second optical functional surface 12 extends linearly in a second axial direction d2 orthogonal to the first axial direction d1. In the illustrated example, a large number of second optical functional surfaces 12 provided corresponding to the unit lenses 30 are configured identically.

  Each second optical functional surface 12 is inclined with respect to the sheet surface of the light control sheet 20, that is, the panel surface of the panel member 10. The angle at which the second optical function surface 12 is inclined with respect to the sheet surface of the light control sheet 20 is different from the angle at which the first optical function surface 11 is inclined with respect to the sheet surface of the light control sheet 20. Each second optical function surface 12 is inclined with respect to a direction parallel to the optical axis od of the unit lens 30. According to such a second optical function surface 12, as will be described later, the second optical function surface 12, which is an angle range in which the optical function from the second optical function surface 12 is expressed, has a high degree of freedom. It becomes possible to adjust with.

  As shown in FIG. 2, each second optical functional surface 12 has the other end portion 12 b located on the other side (lower side) in the first axial direction d <b> 1 positioned on one side (upper side) in the first axial direction d <b> 1. It is inclined with respect to the sheet surface of the light control sheet 20 so as to be closer to the unit lens 30 in the normal direction nd of the panel member 10 than the one end portion 12a. Therefore, the other end portion 12 b of the second optical function surface 12 is closer to the unit lens 30 in the normal direction nd of the panel member 10 than the one end portion 12 a of the second optical function surface 12. As can be understood from FIG. 2, light from an angle range inclined to one side (upper side) with respect to the normal direction nd is easily incident on the second optical function surface 12. Accordingly, the optical function from the second optical function surface 12 is effectively exerted toward an angle range inclined to one side (upper side) with respect to the normal direction nd.

  From the viewpoint of strengthening such a tendency, the second optical functional surface 12 is stepwise from the other side (lower side) to the one side (upper side) in the first axial direction d1 in the main cutting surface of the panel member. Alternatively, it is preferable that the distance from the unit lens 30 is continuously in the normal direction nd of the panel member. In the illustrated example, the second optical functional surface 12 is formed as a flat surface. Then, in the main cutting surface of the panel member 10 shown in FIG. 2, the second optical functional surface 12 is continuously graded from the other side to the one side in the first axial direction d1, It moves away from the unit lens 30 along the normal direction nd of the panel member. According to the second optical function surface 12 as described above, the optical function from the second optical function surface 12 is effectively exerted toward an angle range inclined to one side with respect to the normal direction nd. become.

  In the illustrated embodiment, in the main cutting surface of the panel member shown in FIG. 2, one end portion 12a that is an end portion on one side (upper side) in the first axial direction d1 of the second optical functional surface 12 is: The tip 32a of the lens surface 31 of the unit lens 30 corresponding to the second optical function surface 12 is located at the same position in the first axial direction d1. Further, in the main cutting surface of the panel member shown in FIG. 2, the other end portion 12b which is the other side (lower side) end portion of the second optical functional surface 12 in the first axial direction d1 is the second optical function surface. The lens surface 31 of the unit lens 30 corresponding to the functional surface 12 is located on the other side in the first axial direction d1 than the base end portion 32b on the other side in the first axial direction d1.

  In the illustrated embodiment, the second optical functional surface 12 functions as the light incident surface 50 a of the solar cell panel 50 as described above. That is, the light incident on the panel member 10 from the second angle range AR2 enters the solar cell panel 50 via the second optical function surface 12 as the light incident surface 50a and is used for power generation. As shown in FIGS. 1 and 2, a light incident surface 50 a for taking in light of the solar cell panel 50 is superimposed on a surface forming the second optical functional surface 12 of the light control sheet 20. The solar cell panel 50 includes a solar cell element, and generates an electric current by the captured light. The solar cell panel 50 can use various known members, and is not particularly limited.

  Next, the arrangement relationship between the first optical functional surface 11 and the second optical functional surface 12 will be described. As shown in FIG. 2, the distance between the one end portion 11 a of the first optical functional surface 11 and the other end portion 12 b of the second optical functional surface 12 is the same as the other end portion 11 b of the first optical functional surface 11. The distance between the first optical function surface 12 and the one end portion 12a is wider. Further, the distance between each position on the first optical functional surface 11 and the corresponding second optical functional surface 12 changes stepwise or continuously. In the present embodiment, the distance along the first axial direction d1 between each position on the first optical function surface 11 and the corresponding second optical function surface 12 is the position on the first optical function surface 11. As the distance from the unit lens 30 increases along the normal direction nd of the panel member, the width gradually decreases stepwise or continuously. Therefore, the other end portion 11b of the first optical function surface 11 and the one end portion 12a of the second optical function surface 12 are closest to each other. In the illustrated embodiment, the other end portion 11 b of the first optical functional surface 11 and the one end portion 12 a of the second optical functional surface 12 are connected. However, the other end portion 11b of the first optical function surface 11 and the one end portion 12a of the second optical function surface 12 may be separated from each other.

  Further, as shown in FIG. 2, the connection region between the other end portion 11b of the connected first optical functional surface 11 and the one end portion 12a of the second optical functional surface 12 is the main cutting surface of the panel member. A parallel light beam L <b> 21 (see FIG. 2) traveling in the normal direction nd is located on the focal position fp of the unit lens 30 when it enters the unit lens 30. That is, the connection region between the other end portion 11 b of the connected first optical function surface 11 and the one end portion 12 a of the second optical function surface 12 is located on the optical axis od of the unit lens 30. According to such a panel member 10, it is possible to separate the first angle range AR1 and the second angle range AR2 with the normal direction nd of the panel member as a boundary.

  As shown in FIG. 2, one end 11 a of the first optical functional surface 11 is the other end of the second optical functional surface 12 that is adjacent to the first optical functional surface 11 on one side in the first axial direction d <b> 1. 12b is connected. The connection region between the one end portion 11a of the connected first optical function surface 11 and the other end portion 12b of the second optical function surface 12 is from the connection surface 38 that connects between the base end portions 32b of the two adjacent lens surfaces 31. The panel member is located at a position separated along the normal direction nd of the panel member. However, the one end portion 11a of the first optical function surface 11 is separated from the other end portion 12b of the second optical function surface 12 adjacent to the first optical function surface 11 on one side in the first axial direction d1. Also good.

  Next, an example of a method for manufacturing the panel member 10 described above will be described with reference mainly to FIGS.

  First, as shown in FIG. 6, a molded product is produced by molding a transparent resin. For the molding, hot-melt extrusion processing, injection molding, or the like can be employed. As shown in FIG. 6, in the obtained molded product 60, the first optical functional surface 11 and the second optical functional surface 12 and the surrounding portions of the main body portion 40 of the light control sheet 20 described above are as follows. The cut-out portion 62 has been cut away. Therefore, the lens portion 25 is formed on the molded product 60.

  Next, as shown in FIG. 7, a display surface as the first optical functional surface 11 is formed in the notch 62 of the molded product 60. As an example, the display object 13 is formed in the notch 62 of the molded product 60 by inkjet printing. Thereafter, as shown in FIG. 8, the solar cell panel 50 as the second optical function surface 12 is joined in the notch 62 of the molded product 60.

  Next, as shown in FIG. 9, the notch 62 of the molded product 60 is backfilled with a transparent resin. For example, by applying a liquid transparent resin and scraping with a squeegee, the transparent resin is filled into the notch 62 where the first optical functional surface 11 and the second optical functional surface 12 are formed. Next, the light control sheet 20 can be produced by solidifying the transparent resin in the notch 62. The first optical functional surface 11 and the second optical functional surface 12 can be protected by filling the notch 62 formed with the first optical functional surface 11 and the second optical functional surface 12 with a transparent resin. Thereby, the tolerance with respect to disturbances, such as a change of an environment and a vibration, can be provided to the 1st optical function surface 11 and the 2nd optical function surface 12 which were formed in the light control sheet | seat 20. FIG. However, the backfilling operation shown in FIG. 9 is performed as necessary and may not be performed.

  Next, the operation of the panel member 10 will be described mainly with reference to FIGS. The panel member 10 is arrange | positioned so that the 1st axial direction d1 which is the arrangement direction of the unit lens 30 follows a vertical direction, for example. Specifically, the panel member 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.

  A lens portion 25 is provided on the most observer side of the panel member 10. The unit lens 30 of the lens unit 25 exhibits a lens function with respect to light incident on the panel member 10 or light emitted from the panel member 10 to adjust the traveling direction of the light. The unit lens 30 guides light incident from a direction within a certain angle range AR1 to the first optical function surface 11, and guides light incident from a direction within a certain angle range AR2 to the second optical function surface 12. In other words, the unit lens 30 refracts the light from the first optical function surface 11 and emits it in the direction within the first angle range AR1, and refracts the light from the second optical function surface 12 to the second angle range. The light is emitted in the direction within AR2. Accordingly, the first optical function surface 11 has some optical function for light incident on the panel member 10 from the first angle range AR1 or for light emitted from the panel member 10 toward the first angle range AR1. Can be demonstrated. The second optical function surface 12 has some optical function for light incident on the panel member 10 from the second angle range AR2 or for light emitted from the panel member 10 toward the second angle range AR2. Can be demonstrated.

  In the present embodiment, the first optical functional surface 11 is a display surface on which the display target 13 is formed. Therefore, the display object 13 formed on the first optical function surface 11 can be observed from the first angle range AR1. In this application, the first angle range AR1 is a viewing angle at which the display target 13 can be observed. In general, the first angle range AR1 that is the viewing angle is preferably widened. As in the prior art described with reference to FIG. 13, in a display medium in which a viewing angle of about 30 ° repeatedly appears with a gap, the visibility of a display target to be displayed is significantly reduced, and the information display function is effectively used. I can't demonstrate it. Therefore, it is preferable that the viewing angle of the second angle range AR2 is about 45 ° or more in order to further exhibit the features of the panel member 10 of the present embodiment. Note that the upper limit of the viewing angle of the second angle range AR2 may be set as appropriate in balance with the first angle range AR1, but it is considered that there are many cases where it is less than about 135 °.

  On the other hand, the second optical function surface 12 forms the light incident surface 50 a of the solar cell panel 50. Therefore, it is preferable to guide light incident from a wide angle range to the second optical functional surface 12 and use it for power generation in the solar cell panel 50. In particular, sunlight changes its position according to the time zone and season. In the panel member 10, it is preferable if the sunlight that changes the incident direction according to the time zone and the season can be stably guided to the second optical function surface 12. That is, when taking in sunlight that changes the incident direction with high efficiency, it is preferable that the second angle range AR2 described above is widened.

  Table 1 below shows the South-South Altitude (°) by season in major cities in some countries of the world. When the second optical functional surface 12 functions as the light incident surface 50a of the solar battery panel 50, the south and middle altitudes for spring equinox in major cities in the country where the use is assumed are included in the second angle range AR2. Is preferred. 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 panel member 10 at an angle. On the other hand, the upper limit of the angle range of the second angle range AR2 may be set as appropriate in balance with the first angle range AR1, but by setting it to less than about 135 °, as described later, The feature of the panel member 10 can be exhibited more.

  The panel member 10 according to the present embodiment described above includes a plurality of unit lenses 30 arranged in the first axial direction d1 and a plurality of unit lenses 30 arranged in the main body 40 so as to face the corresponding unit lenses 30 respectively. A first optical functional surface 11 and a second optical functional surface 12; The first optical functional surface 11 and the second optical functional surface 12 are inclined at different angles with respect to the sheet surface of the light control sheet 20.

  In such a panel member 10, as well shown in FIG. 4, the inclined first optical functional surface 11 emits light L <b> 42, L <b> 43, L <b> 44 coming from the front direction of the first optical functional surface 11. It becomes possible to receive light efficiently. In the example shown in FIG. 4, the first optical functional surface 11 is inclined to one side in the first axial direction d1 with respect to the optical axis od of the unit lens 30, and therefore the first axial direction with respect to the optical axis od. Light L42, L43, and L44 incident on the lens surface 31 from a direction inclined to the other side in d1 can be efficiently received. In the conventional example described with reference to FIG. 13, the light L153 and L154 from the direction inclined by about 30 ° or more with respect to the optical axis of the unit lens 130 due to the refractive index of the resin material that can be practically selected are The traveling direction is not greatly bent by the lens function of the unit lens 130, and as a result, the light is incident on the optical function surfaces 111 and 112 facing the unit lenses other than the unit lens 130. On the other hand, according to the present embodiment, as shown in FIG. 4, the light L44 incident on the lens surface 31 from the direction greatly inclined to the other side in the first axial direction d1 with respect to the optical axis od is also incident. The first optical functional surface 11 facing the unit lens 30 receives light. As shown by a dotted line in FIG. 4, if the first optical functional surface 11 is arranged on the same surface as the back surface 10 b of the panel member 10, the light L44 is incident on a unit lens different from the unit lens 30 that has entered. Proceed to the facing area and cause the problem described in the prior art.

  In other words, the first optical function surface 11 is tilted with respect to the sheet surface of the light control sheet 20, and is the first angle range in the incident direction to the panel member 10 that is guided to the first optical function surface 11. The angle range AR1, in other words, the first angle range AR1, which is the angle range of the light emission direction from the first optical functional surface 11, is adjusted with a higher degree of freedom than the conventional example shown in FIG. be able to. In particular, the first optical functional surface 11 is inclined with respect to the sheet surface of the light control sheet 20 in the main body 40 closer to the unit lens 30 than the back surface 10 b of the panel member 10. Accordingly, the first optical functional surface 11 is inclined with respect to the optical axis od than the conventional panel member shown in FIG. 13 in which the first optical functional surface 11 is arranged on the same surface as the back surface 10b of the panel member 10. It becomes possible for the first optical functional surface 11 to effectively receive the light L42, L43, L44 coming from the front direction. As a result, the first optical functional surface 11 can receive light L42, L43, L44 coming from a wide range of directions inclined with respect to the optical axis od, as compared with the conventional example shown in FIG. The first angle range AR1 can be widened. The adjustment or widening of the first angle range AR1 does not require the use of a high-refractive index material, which is generally expensive, for the unit lens 30, and a material similar to the conventional one may be used. In other words, the adjustment and widening of the first angle range AR1 can be realized without increasing the cost from the material side.

  From the above, the optical function from the first optical function surface 11 is exhibited within the wide first angle range AR1. In the panel member 10 according to the present embodiment, it is possible to observe the display target 13 provided to the first optical function surface 11 stably from a wide viewing angle. Therefore, the observer can observe the display target 13 with excellent visibility and can display the display target 13 with excellent design.

  On the other hand, the second optical function surface 12 inclined at an angle different from that of the first optical function surface 11 efficiently transmits light L52, L53, and L54 incident from a direction different from the light incident on the first optical function surface 11. It becomes possible to receive light. As well shown in FIG. 5, the second optical functional surface 12 can efficiently receive the light L52, L53, L54 coming from the front direction of the second optical functional surface 12. . In the example shown in FIG. 5, the second optical functional surface 12 is inclined to the other side in the first axial direction d1 with respect to the optical axis od of the unit lens 30, and therefore the first axial direction with respect to the optical axis od. Light L52, L53, and L54 incident on the lens surface 31 from a direction inclined to one side in d1 can be efficiently received. As described above, in the conventional example described with reference to FIG. 13, due to the refractive index of the resin material that can be selected practically, it is from a direction inclined by about 30 ° or more with respect to the optical axis of the unit lens 130. The light L153 and L154 are not greatly bent in the traveling direction due to the lens function of the unit lens 130, and as a result, enter the optical function surfaces 111 and 112 that face unit lenses other than the unit lens 130. It was. On the other hand, according to the present embodiment, as shown in FIG. 5, the light L54 incident on the lens surface 31 from the direction greatly inclined to one side in the first axial direction d1 with respect to the optical axis od is also incident. The light is received by the second optical function surface 12 facing the unit lens 30. As indicated by a dotted line in FIG. 5, if the second optical functional surface 12 is arranged on the same surface as the back surface 10 b of the panel member 10, the light L54 is transmitted to a unit lens different from the incident unit lens 30. Proceed to the facing area and cause the problem described in the prior art.

  That is, the second optical function surface 12 is an angle range in the incident direction to the panel member 10 that is guided to the second optical function surface 12 by inclining the second optical function surface 12 with respect to the sheet surface of the light control sheet 20. The angle range AR2, in other words, the second angle range AR2 that is the angle range of the light emission direction from the second optical functional surface 12 is adjusted with a higher degree of freedom than the conventional example shown in FIG. be able to. In particular, the second optical functional surface 12 is inclined with respect to the sheet surface of the light control sheet 20 in the main body 40 closer to the unit lens 30 than the back surface 10 b of the panel member 10. Accordingly, the second optical functional surface 12 is inclined with respect to the optical axis od than the conventional panel member shown in FIG. 13 in which the second optical functional surface 12 is arranged on the same surface as the back surface 10 b of the panel member 10. The light L52, L53, and L54 coming from the front direction can be effectively received by the second optical function surface 12. As a result, the second optical functional surface 12 can receive light L52, L53, L54 coming from a wide range of directions inclined with respect to the optical axis od, as compared with the conventional example shown in FIG. The second angle range AR2 can be widened. Further, the adjustment or widening of the second angle range AR2 does not require the use of a high-refractive index material, which is generally expensive, for the unit lens 30, and a material similar to the conventional one may be used. That is, the adjustment and widening of the second angle range AR2 can be realized without increasing the cost from the material side.

  From the above, the optical function from the second optical function surface 12 is exhibited within the wide second angle range AR2. In panel member 10 according to the present embodiment, it is possible to efficiently receive sunlight that changes the incident direction according to the time zone and season, and use it for power generation in solar cell panel 50.

  As described above, according to the present embodiment, the unit lenses 30 arranged in the first axial direction d1 and the unit lenses 30 are arranged in the sheet-like main body 40 so as to face the corresponding unit lenses 30. A light control sheet 20 including a plurality of first optical functional surfaces 11 and a plurality of second optical functional surfaces 12 disposed in the main body 40 so as to face the corresponding unit lenses 30; The second optical functional surface 12 is inclined with respect to the sheet surface of the light control sheet 20 at an angle different from that of the first optical functional surface 11, and the unit lens 30 transmits light incident from a certain direction to the first optical functional surface. 11, the light incident from another direction different from the certain direction is guided to the second optical function surface 12. According to such a panel member 10, the optical function at the first angle range AR <b> 1 and the second optical function surface 12 that are the angle ranges in the direction in which the optical function at the first optical function surface 11 is exhibited is exhibited. It is possible to adjust the second angle range AR2 that is the angle range of the direction with a high degree of freedom. It is also possible to effectively widen the first angle range AR1 and the second angle range AR2. Furthermore, the adjustment or widening of the first angle range AR1 and the second angle range AR2 does not require the use of a high-refractive index material, which is generally expensive, for the unit lens 30, and the same material as the conventional one can be used. That's fine. That is, the first angle range AR1 and the second angle range AR2 can be adjusted or widened without increasing the cost from the material side.

  By the way, when observing the display object 13 formed on the first optical function surface 11, if the solar cell panel 50 superimposed on the second optical function surface 12 together with the display object 13 is observed, the display object 13 is displayed. Visibility and designability will be significantly impaired. Therefore, the first angle range AR1 in which the first optical functional surface 11 on which the display target 13 is formed can be observed is separated from the second angle range AR2 in which the solar cell panel 50 can be observed. Preferably they do not overlap.

  Therefore, in the panel member 10 of the present embodiment, as shown in FIG. 2, each first optical function surface 11 is arranged on one side in the first axial direction d1 with respect to the corresponding second optical function surface 12. ing. And each 1st optical function surface 11 has the one end part 11a located in one side in the 1st axial direction d1, and the normal line of a panel member rather than the other end part 11b located in the other side in the 1st axial direction d1. Each second optical functional surface 12 is inclined with respect to the sheet surface of the light control sheet 20 so as to be close to the unit lens 30 in the direction nd, and the other end 12b positioned on the other side in the first axial direction d1. Further, the light control sheet 20 is inclined with respect to the sheet surface of the light control sheet 20 so as to be closer to the unit lens 30 in the normal direction nd of the panel member than the one end portion 12a located on one side in the first axial direction d1. According to the present embodiment, the light L23 incident on the panel member 10 from the direction inclined to the other side in the first axial direction d1 with respect to the normal direction nd of the panel member, in other words, the first axial direction d1. , The light L23 incident on the panel member 10 while proceeding to one side can be selectively guided to the first optical function surface 11 rather than the second optical function surface 12. In other words, the light L23 from the first optical function surface 11 is easily emitted in a direction inclined to the other side in the first axial direction d1 with respect to the normal direction nd of the panel member. Further, the light L22 incident on the panel member 10 from a direction inclined to one side in the first axial direction d1 with respect to the normal direction nd of the panel member, in other words, the panel member 10 while proceeding to the other side in the first axial direction d1. The light L22 incident on the second optical function surface 12 can be guided to the selection rather than the first optical function surface 11. In other words, the light L22 from the second optical function surface 12 is easily emitted in a direction inclined to one side in the first axial direction d1 with respect to the normal direction nd of the panel member.

  That is, according to such a form, the first angle range AR1 that is the angle range of the incident direction to the panel member 10 that is guided to the first optical functional surface 11 is relative to the normal direction nd of the panel member. The second angle range AR2 that corresponds to the direction inclined to the other side in the first axial direction d1 and is the angle range in the incident direction to the panel member 10 that is guided to the second optical function surface 12 is the panel member. This corresponds to a direction inclined to one side in the first axial direction d1 with respect to the normal direction nd. For this reason, the first angle range AR1 and the second angle range AR2 are easily divided. 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.

  Thus, if the overlap between the first angle range AR1 and the second angle range AR2 is reduced, and if it is possible to further separate the first angle range AR1 and the second angle range AR2, the first optical functional surface is obtained. The optical function at 11 and the optical function at the second optical function surface 12 are more effectively exhibited without adversely affecting each other. In the present embodiment, when observing the display object 13 given to the first optical function surface 11, the solar cell panel 50 superimposed on the second optical function surface 12 together with the display object 13 is observed. This can be effectively prevented. 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 panel member 10 according to the present embodiment, the first angle range AR1 that is the angle range of the incident direction to the panel member 10 to be guided to the first optical function surface 11 is inclined downward in the vertical direction. The second angle range AR2 that is the angle range of the incident direction to the panel member 10 to be guided to the second optical function surface 12 is set to a direction inclined upward in the vertical direction. In this case, when the panel member 10 is installed at a position higher than the line of sight in an application as a display plate assumed as a typical use, the observer observes the panel member 10 while looking up at the upper side in the vertical direction. The display object 13 formed on the first optical functional surface 11 can be observed from the first angle range AR1. On the other hand, the incident direction of sunlight changes depending on the time zone and season, but enters the lens surface 31 while proceeding in a direction inclined downward in the vertical direction. For this reason, sunlight can enter the lens surface 31 from the second angle range AR2 and travel toward the second optical functional surface 12 even if the incident direction changes according to the time zone or season. Therefore, according to such a form, the reception of sunlight and the display of the display target 13 can be effectively made compatible.

  Further, according to the present embodiment, the distance between the one end portion 11 a of the first optical function surface 11 and the other end portion 12 b of the second optical function surface 12 is the other end of the first optical function surface 11. The distance between the portion 11b and the one end portion 12a of the second optical functional surface 12 is wider. According to such a form, the 1st optical functional surface 11 and the 2nd optical functional surface 12 can be arrange | positioned with sufficient balance, and it contributes to distinguishing 1st angle range AR1 and 2nd angle range AR2. To do.

  Further, according to the present embodiment, the distance along the first axial direction d1 between each position on the first optical functional surface 11 and the corresponding second optical functional surface 12 is the first optical functional surface 11. As the upper position moves away from the unit lens 30 along the normal direction nd of the panel member 10, it becomes narrower. According to such a form, the first optical functional surface 11 blocks light that should be incident on the second optical functional surface 12, or the second optical functional surface 12 is directed to the first optical functional surface 11. It is possible to effectively suppress blocking of light to be incident. Therefore, the first optical functional surface 11 is more sensitive to light incident on the panel member 10 from the first angle range AR1 or to light emitted from the panel member 10 toward the first angle range AR1. The optical function can be surely exhibited. In addition, the second optical functional surface 12 is more reliable for light incident on the panel member 10 from the second angle range AR2 or for light emitted from the panel member 10 toward the second angle range AR2. The optical function can be exhibited.

  Further, according to the present embodiment, the other end portion 11b located on the other side in the first axial direction d1 of the first optical functional surface 11 is on one side in the first axial direction d1 of the second optical functional surface 12. It connects with the one end part 12a located. According to such a configuration, it is possible to prevent the light bent by the lens surface 31 from passing between the other end portion 11b of the first optical functional surface 11 and the one end portion 12a of the second optical functional surface 12. The light can be incident on the first optical functional surface 11 or the second optical functional surface 12. As a result, the light incident on the panel member 10 can be used efficiently. In particular, in the connection region between the other end portion 11b of the first optical functional surface 11 and the one end portion 12a of the second optical functional surface 12, the parallel light beams L21, L41, and L51 traveling in the normal direction nd of the panel member are unit lenses 30. Is located on the focal position fp of the unit lens 30 when the light enters the lens. According to such a panel member 10, it is possible to separate the first angle range AR1 and the second angle range AR2 with the normal direction nd of the panel member as a boundary.

  Further, according to the present embodiment, the one end portion 11a located on one side in the first axial direction d1 of the first optical functional surface 11 is connected to the first optical functional surface 11 on one side in the first axial direction d1. The adjacent second optical function surface 12 is connected to the other end portion 12b located on the other side in the first axial direction d1. According to such a form, the light incident on the panel member 10 is transmitted between the one end portion 11a of the first optical function surface 11 and the other end portion 12b of the adjacent second optical function surface 12. And the light can be incident on the first optical functional surface 11 or the second optical functional surface 12. As a result, the light incident on the panel member 10 can be used efficiently.

  In addition, according to the present embodiment, the plurality of unit lenses 30 are arranged apart from each other in the first axial direction d1, and between the two unit lenses 30 adjacent to each other in the first axial direction d1, the unit lens. A connection surface 38 that forms the surface 10 a of the panel member 10 together with 30 is provided. As described above, the light control sheet 20 including the unit lens 30 can be efficiently manufactured by resin molding using a mold as an example. By providing the connection surface 38, it is possible to reduce “scratching” of the adjacent lens with respect to light traveling obliquely.

≪Modification≫
Note that various modifications can be made to the above-described embodiment. Hereinafter, an example of modification will be described with reference to the drawings. In the following description and the drawings used in the following description, the same reference numerals as those used for the corresponding parts in the above-described embodiment are used for parts that can be configured in the same manner as in the above-described embodiment, and overlapping Description to be omitted is omitted.

  In the above-described embodiment, as shown in FIG. 2, in the main cutting surface of the panel member, the connection region between the other end portion 11 b of the first optical function surface 11 and the one end portion 12 a of the second optical function surface 12 is Although an example in which the main cutting surface of the panel member is positioned on the focal position fp of the unit lens 30 has been shown, the present invention is not limited to such an example. 10 and 11 show other arrangement examples of the connection region between the other end portion 11b of the first optical functional surface 11 and the one end portion 12a of the second optical functional surface 12. FIG. In the example shown in FIGS. 10 and 11, the parallel light flux traveling in the normal direction nd of the panel member is in the connection region between the other end portion 11 b of the first optical functional surface 11 and the one end portion 12 a of the second optical functional surface 12. The unit lens 30 is disposed so as to deviate from the focal position fp when entering the unit lens 30.

  Among these, in the example shown in FIG. 10, the connection region between the other end portion 11 b of the first optical functional surface 11 and the one end portion 12 a of the second optical functional surface 12 is more than the focal point fp of the corresponding unit lens 30. It is located on the other side in the first axial direction d1. Further, the connection region is located on the virtual plane p1 defined by the focal points fp of the multiple unit lenses 30. According to such a configuration, the first angle range AR1 and the second angle range AR2 are centered on the direction da inclined to one side (upper side) in the first axial direction d1 relative to the normal direction nd of the panel member. It can be cut. In this case, for example, it is suitable when the panel member 10 is installed at a position that is not so high with respect to the line of sight in a use as a display plate assumed as a typical use. That is, when the observer observes the panel member 10 from the direction db with a small angle with respect to the horizontal direction or the direction dc inclined upward in the vertical direction, it is formed on the first optical functional surface 11. The displayed display object 13 can be observed. On the other hand, the sunlight L26 that travels in the direction de inclined downward in the vertical direction and enters the lens surface 31 can travel toward the second optical function surface 12. Therefore, according to such a form, while sufficiently capturing sunlight at the second optical function surface 12, the display object 13 given to the first optical function surface 11 is the same as or above the line of sight. It can be observed with excellent visibility.

  On the other hand, in the example shown in FIG. 11, the connection region between the other end portion 11 b of the first optical functional surface 11 and the one end portion 12 a of the second optical functional surface 12 is greater than the focal point fp of the corresponding unit lens 30. It is located on one side in the one axial direction d1. Further, the connection region is located on the virtual plane p1 defined by the focal points fp of the multiple unit lenses 30. According to such a configuration, the first angle range AR1 and the second angle range AR2 are centered on the direction df inclined to the other side (lower side) in the first axial direction d1 than the normal direction nd of the panel member. Can be carved. In this case, for example, it is suitable when the panel member 10 is installed at a position relatively higher than the line of sight in a use as a display plate assumed as a typical use. That is, since the observer observes the panel member 10 while looking up at the upper side in the vertical direction, the display object 13 formed on the first optical functional surface 11 is looked up in the direction dg inclined upward in the vertical direction. Can be observed. On the other hand, the sunlight L27 and L28 that enter the panel member 10 from the direction dh having a small angle with respect to the horizontal direction or entering the direction di inclined downward in the vertical direction are incident on the second optical function surface 12. Can proceed towards. Therefore, according to such a form, it is possible to look up at the display target 13 given to the second optical functional surface 12 with sufficient visibility, and to greatly emit sunlight on the first optical functional surface 11. It can be captured with high efficiency.

  In the example shown in FIGS. 2, 10, and 11, the connection region between the other end portion 11 b of the first optical functional surface 11 and the one end portion 12 a of the second optical functional surface 12 is on the main cut surface of the panel member. Although an example in which the unit lens 30 is positioned on the virtual plane p1 defined by the focal points fp of the unit lenses 30 is shown, the present invention is not limited to such an example. FIG. 12 shows still another arrangement example of the connection region between the other end portion 11 b of the first optical function surface 11 and the one end portion 12 a of the second optical function surface 12. In the example shown in FIG. 12, the connection region between the other end portion 11 b of the first optical functional surface 11 and the one end portion 12 a of the second optical functional surface 12 is the focal point of many unit lenses 30 on the main cutting surface of the panel member. The virtual surface defined by fp, that is, the rear surface 10 b of the panel member 10 is disposed at a position closer to the unit lens 30. According to such a configuration, the first optical functional surface 11 or the second optical functional surface 12 receives light that is being condensed from the lens surface 31 toward the condensing region such as the focal point fp. Can do. Therefore, the light received by the first optical functional surface 11 or the second optical functional surface 12 becomes light that has spread before being relatively condensed. In particular, when the first optical functional surface 11 or the second optical functional surface 12 forms the light incident surface 50a of the solar cell panel 50, the solar cell panel 50 is more preferable than receiving light locally at the light incident surface 50a. It is possible to generate power more efficiently when light is received in a wider area of the light incident surface 50a. That is, according to the panel member 10 shown in FIG. 12, when the first optical functional surface 11 or the second optical functional surface 12 forms the light incident surface 50a of the solar cell panel 50, the connection region is on the focal point fp1. High power generation efficiency is demonstrated compared with the case where it is arranged.

  Moreover, as already demonstrated, the 1st optical function surface 11 functions as a surface which displays the display target 13, or the 2nd optical function surface 12 functions as the light-incidence surface 50a of the solar cell panel 50. FIG. That is just an example. As an example, the second optical function surface 12 may also function as a display surface for performing display. In this modification, the panel member 10 is arranged so that the first direction d1 intersects the horizontal direction, and the display target displayed by the first optical functional surface 11 and the display displayed by the second optical functional surface 12 are displayed. The object may be switched and observed by changing the observation direction in the horizontal plane. At this time, the display object 13 moved by the first optical function surface 11 is displayed by superimposing the display on the first optical function surface 11, and the stationary display object is displayed by the second optical function surface 12. Good. As another example, the second optical functional surface 12 may function as a surface for displaying the display target 13, and the first optical functional surface 11 may function as the light incident surface 50 a of the solar cell panel 50. . As a result, the inclined first optical functional surface 11 can easily receive sunlight incident from above.

  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 Panel member 10a Front surface 10b Back surface 11 1st optical function surface 11a One end part 11b Other end part 12 2nd optical function surface 12a One end part 12b Other end part 13 Display object 20 Light control sheet 25 Lens part 30 Unit lens 31 Lens surface 32a Front end portion 32b Base end portion 38 Connection surface 40 Main body portion 50 Solar cell panel 50a Light incident surface 60 Molded product 62 Notched portion

Claims (9)

A plurality of unit lenses arranged in at least one axial direction, a sheet-like main body portion on which the plurality of unit lenses are arranged, and a plurality of second lenses arranged in the main body portion so as to face the plurality of unit lenses. A panel member including a light control sheet including one optical function surface and a plurality of second optical function surfaces disposed in the main body so as to face the plurality of unit lenses,
The first optical function surface is inclined with respect to a sheet surface of the light control sheet;
The second optical functional surface is inclined at an angle different from the first optical functional surface with respect to a sheet surface of the light control sheet;
The unit lens guides light incident from a certain direction to the first optical functional surface, guides light incident from another direction different from the certain direction to the second optical functional surface,
The first optical functional surface arranged corresponding to each unit lens is arranged on one side in the uniaxial direction from the second optical functional surface arranged corresponding to the unit lens,
Each of the first optical functional surfaces has an end portion located on one side in the uniaxial direction closer to the unit lens in the normal direction of the panel member than an end portion located on the other side in the uniaxial direction. Inclined with respect to the sheet surface of the light control sheet,
Each of the second optical functional surfaces has an end located on the other side in the uniaxial direction so as to be closer to the unit lens in the normal direction of the panel member than an end located on the one side in the uniaxial direction. Inclined with respect to the sheet surface of the light control sheet,
Each first optical functional surface is inclined at a constant angle from one side to the other side in the uniaxial direction in a cross section parallel to both the uniaxial direction and the normal direction of the panel member,
Each second optical functional surface is inclined at a constant angle from one side to the other side in the uniaxial direction in a cross section parallel to both the uniaxial direction and the normal direction of the panel member ,
The first optical function surface is a display surface for performing display,
A panel member in which a display target element is given to each first optical functional surface, and a display target is formed by a combination of the display target elements. A plurality of unit lenses arranged in at least one axial direction;
A plurality of first optical functional surfaces arranged to face the plurality of unit lenses;
A plurality of second optical functional surfaces disposed to face the plurality of unit lenses;
A panel member comprising:
The first optical functional surface disposed to face a certain unit lens is disposed on one side in the uniaxial direction from the second optical functional surface disposed to face the unit lens.
The end portion located on one side in the uniaxial direction of the first optical function surface is more in the normal direction of the panel member than the end portion located on the other side in the uniaxial direction of the first optical function surface. Close to the unit lens,
The end portion located on the other side in the uniaxial direction of the second optical function surface is more in the normal direction of the panel member than the end portion located on the one side in the uniaxial direction of the second optical function surface. Close to the unit lens,
The unit lens guides light incident from a certain direction to the first optical functional surface, guides light incident from another direction different from the certain direction to the second optical functional surface,
The first optical functional surface and the second optical functional surface are flat surfaces ,
The first optical function surface is a display surface for performing display,
A panel member in which a display target element is given to each first optical functional surface, and a display target is formed by a combination of the display target elements.   The unit lens guides light incident from a direction inclined to the other side with respect to the normal direction of the panel member to the first optical function surface, and is inclined to one side with respect to the normal direction of the panel member. The panel member according to claim 1, wherein light incident from a direction is guided to the second optical functional surface.   An interval between an end portion located on one side in the uniaxial direction of the first optical functional surface and an end portion located on the other side in the uniaxial direction of the second optical functional surface is set to be the first optical The distance between the end portion located on the other side in the uniaxial direction of the functional surface and the end portion located on the one side in the uniaxial direction of the second optical functional surface is wider. The panel member as described in any one of 1-3.   The distance along the uniaxial direction between each position on the first optical functional surface and the corresponding second optical functional surface is such that the position on the first optical functional surface is along the normal direction of the panel member. The panel member according to claim 4, wherein the panel member becomes narrower as the distance from the unit lens increases.   The end located on the other side in the uniaxial direction of the first optical functional surface is connected to the end located on the one side in the uniaxial direction of the second optical functional surface. The panel member according to claim 1.   The end portion located on one side in the uniaxial direction of the first optical functional surface is the other side in the uniaxial direction of the second optical functional surface adjacent to the first optical functional surface on one side in the uniaxial direction. The panel member as described in any one of Claims 1-6 connected with the edge part located in this. A solar cell panel is provided facing the second optical functional surface,
The second optical functional surface, said forms an incident surface of the solar cell panel, the panel member according to any one of claims 1 to 7. The plurality of unit lenses are arranged apart from each other in the uniaxial direction,
The panel member as described in any one of Claims 1-8 with which the connection surface which makes the surface of a panel member with the said unit lens between the two unit lenses adjacent to the said uniaxial direction is provided.

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