JP2018004944A - Display body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display body capable of enhancing the visibility of an image displayed by the display body.SOLUTION: The display body includes a rugged surface 10S on which light is made incident and which reflects the incident light. The rugged surface 10S includes a first area 11 and a second area 12. Each of the first area 11 and the second area 12 includes a plurality of surface elements. The plurality of surface elements include a first surface element 11a and a second surface element 12a. Each first surface element 11a includes a curved surface part and a flat surface part and is configured so that the flat surface part emits the light toward a predetermined fixed point according to the position of the flat surface part in the first surface element 11a. Each second surface element 12a includes the curved surface part and is configured so that the curved surface part of the second surface element 12a emits the light toward a fixed point according to the position of the curved surface part in the second surface element 12a. The surface element included in the first area 11 is the first surface element 11a and the surface element included in the second area 12 is the second surface element 12a.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a display body.

  A display body having a plurality of pyramids is known. In this display body, a plurality of pyramids having the same shape are regularly arranged with no gap between the pyramids adjacent to each other along one plane. Among a plurality of surfaces of one pyramid, a plurality of surfaces excluding a surface in contact with a plane on which the pyramid is located are reflection surfaces that reflect light. Each reflecting surface functions as an element for emitting light toward different fixed points and forming different images (see, for example, Patent Document 1).

JP-T-2015-505973

By the way, an observer of the display body may observe the display body from a direction in which both light emitted from one surface of the pyramid and light emitted from the other surface can be visually recognized. In the pyramid, the difference in the amount of light emitted from each reflecting surface toward a fixed point is small. In this case, the observer visually recognizes light in which two lights are mixed. As a result, it is difficult for an observer to recognize separately an image including light emitted from one surface and an image including light emitted from another surface, and as a result, the visibility of each image is improved. Lower.
An object of this invention is to provide the display body which made it possible to improve the visibility of the image which a display body displays.

  A display for solving the above-described problem includes an uneven surface that receives and reflects incident light, and the uneven surface includes a first region and a second region, and the first region and the first region Each of the two regions includes a plurality of surface elements, the plurality of surface elements include a first surface element and a second surface element, and each of the first surface elements includes a curved surface portion and a flat surface portion. The planar portion emits light toward a predetermined fixed point depending on the position of the planar portion in the first surface element, and each second surface element includes a curved surface portion and the second surface element. The curved surface portion of the second surface element is configured to emit light toward the fixed point according to the position of the curved surface portion of the surface element, and the surface element included in the first region includes the first surface element. And the surface element included in the second region is the second surface element. .

  According to the above configuration, when the observer observes the display body from a fixed point, the first surface element emits light from the flat surface portion having a predetermined area, while the second surface element emits light from the curved surface portion. . Therefore, the amount of light per unit area in the first region is larger than the amount of light per unit area in the second region. Therefore, the image formed by the light emitted from the first region and the image formed by the light emitted from the second region are recognized as different images depending on the contrast between the first region and the second region. It becomes easy. As a result, it is possible to improve the visibility of the image formed by the first region and the image formed by the second region and displayed by the display body.

  In the above display body, the first surface element further includes a combining plane portion, and the first surface element is different from the fixed point according to the position of the combining plane portion in the first surface element. And the second plane element further includes a synthesis plane portion, and the second plane element is the synthesis plane in the second plane element. Depending on the position of the portion, the combining plane portion of the second surface element may be configured to emit light toward the combining fixed point.

  According to the above configuration, when the observer visually recognizes the display body from a fixed point, the display body displays the light amount per unit area of the light emitted from the first region and the unit area of the light emitted from the second region. The image formed by the first region and the image formed by the second region can be displayed to the observer based on the difference from the amount of light hit. On the other hand, when the observer visually recognizes the display body from the synthesis fixed point, the difference in the amount of light per unit area between the light emitted from the first area and the light emitted from the second area becomes small. Therefore, the display body can display one image obtained by combining the light emitted from the first region and the light emitted from the second region toward the observer. Therefore, the display body can display different images toward different fixed points.

  In the display body, the synthesis plane portion of the first surface element and the synthesis plane portion of the second surface element are directed toward the synthesis fixed point according to the surface roughness of each synthesis plane portion. It may be configured to emit scattered light.

  According to the above configuration, the range of the emission angle in the light emitted from each synthesis plane is widened. Therefore, the range in which one image formed by the first region and the second region can be viewed in the viewing direction when the observer observes the display body can be expanded.

  In the display body, the fixed point is a first fixed point, and the uneven surface has a position on the uneven surface different from the first region and the second region, and a third region including the plurality of surface elements. Further, the plurality of surface elements further include a third surface element, each of the third surface elements includes a curved surface portion and a flat surface portion, and the third surface element is the flat surface of the third surface element. The plane portion of the third surface element emits light toward a second fixed point different from the first fixed point depending on the position of the portion, and the surface element included in the third region is Each of the second surface elements emits light toward the second fixed point by the curved surface portion of the second surface element according to the position of the curved surface portion of the second surface element. It may be configured.

  According to the above configuration, the display body has a difference between the light amount per unit area of the light emitted from the first region and the light amount per unit area of the light emitted from the second region toward the first fixed point. Thus, an image formed by the first region and an image formed by the second region can be displayed. Further, the display body has a third difference due to the difference between the light amount per unit area of the light emitted from the third region and the light amount per unit area of the light emitted from the second region toward the second fixed point. An image formed by the region and an image formed by the first region can also be displayed.

  In the display body, the fixed point is a first fixed point, and the uneven surface is a third region including a plurality of surface elements, the position of the uneven surface being different from the second region. The third area further includes a third area that overlaps a part of the first area, the plurality of surface elements further include a third surface element and a fourth surface element, and each of the third surface elements includes The third surface element includes a curved surface portion and a flat surface portion, and the third surface element moves toward the second fixed point different from the first fixed point according to the position of the flat surface portion in the third surface element. A plane portion is configured to emit light, and among the plurality of first surface elements, the first surface element located in a portion overlapping the third region is a fourth surface element, and the fourth surface In the element, the planar portion is a first planar portion, and the fourth surface element is a second planar portion. The fourth surface element is further configured to emit light toward the second fixed point according to a position of the second flat surface portion in the fourth surface element, and the fourth surface element includes the third region, The surface element included in the portion that does not overlap the first region is the third surface element, and each second surface element is a position of the curved surface portion of the second surface element in the second surface element. Thus, the curved surface portion of the second surface element may be configured to emit light toward the second fixed point.

  According to the above configuration, a single fourth surface element is used to form a part of an image formed by light emitted toward the first fixed point and light emitted toward the second fixed point. A portion of the image can be formed.

  In the display body, it is preferable that the curved surface portion is located between the first flat surface portion and the second flat surface portion in the fourth surface element.

  According to the above configuration, since the first plane portion and the second plane portion are not in contact with each other, compared to the configuration in which the first plane portion and the second plane portion are in contact, the light emitted from the first plane portion, It is possible to reduce the possibility that both the light emitted from the second plane portion and the light are simultaneously viewed by the observer. Therefore, mixing of the image formed by the first plane part and the image formed by the second plane part is suppressed, and the visibility of the image formed by the first plane part and the image formed by the second plane part is reduced. Can be increased respectively.

  ADVANTAGE OF THE INVENTION According to this invention, the visibility of the image which a display body displays can be improved.

The top view which shows the planar structure of the display body in 1st Embodiment. FIG. 2 is a partial cross-sectional view showing a partial cross-sectional structure of a display body taken along line II in FIG. 1. The perspective view which shows the perspective structure of the 1st convex part which a display body contains. The perspective view which shows the perspective structure of the 2nd convex part which a display body contains. The partial enlarged plan view which expands and shows the planar structure in a part of uneven structure layer contained in the area | region A of FIG. The action figure for demonstrating the effect | action of a display body. The top view which shows the planar structure which looked at an example of the 1st surface element from the upper surface. Sectional drawing which shows an example of the cross-section of the 1st convex part which follows the II-II line | wire of FIG. Sectional drawing which shows an example of the cross-section of the 1st convex part which follows the II-II line | wire of FIG. The top view which shows the planar structure which looked at an example of the 1st surface element from the upper surface. Sectional drawing which shows an example of the cross-section of the 1st convex part which follows the III-III line | wire of FIG. The fragmentary sectional view which shows the partial cross section structure of the display body which follows the II line | wire of FIG. 1 in a modification. The perspective view which shows the perspective structure of the 1st convex part which the display body in 2nd Embodiment contains. The perspective view which shows the perspective structure of the 2nd convex part which a display body contains. The action figure for demonstrating the effect | action of a display body. The action figure for demonstrating the effect | action of a display body. The top view which shows the planar structure of the display body in 3rd Embodiment. The top view which shows the planar structure which looked at the 1st convex part which a display body contains from the upper surface. The top view which shows the planar structure which looked at the 3rd convex part which a display body contains from the upper surface. The top view which shows the planar structure which looked at the 4th convex part which a display body contains from the upper surface. The top view which shows the planar structure which looked at the 5th convex part which a display body contains from the upper surface. The action figure for demonstrating the effect | action of a display body. The action figure for demonstrating the effect | action of a display body. The action figure for demonstrating the effect | action of a display body. The action figure for demonstrating the effect | action of a display body. The top view which shows the planar structure of the display body in 4th Embodiment which actualized the display body of this invention. The top view which shows the planar structure which looked at the 1st convex part which a display body contains from the upper surface. The top view which shows the planar structure which looked at the 3rd convex part which a display body contains from the upper surface. The top view which shows the planar structure which looked at the 4th convex part which a display body contains from the upper surface. The top view which shows the planar structure which looked at the 5th convex part which a display body contains from the upper surface. The top view which shows the planar structure which looked at the 6th convex part which a display body contains from the upper surface. The action figure for demonstrating the effect | action of a display body. The action figure for demonstrating the effect | action of a display body. The action figure for demonstrating the effect | action of a display body. The action figure for demonstrating the effect | action of a display body.

[First Embodiment]
A first embodiment of a display body will be described with reference to FIGS. Below, the structure of a display body, the structure of the surface element which a display body contains, the effect | action of a display body, and the manufacturing method of a display body are demonstrated in order.

[Configuration of the display body]
The configuration of the display body will be described with reference to FIGS.
As shown in FIG. 1, the display body 10 includes an uneven surface 10 </ b> S that receives light and reflects the incident light. The uneven surface 10 </ b> S includes a first region 11 and a second region 12. The first region 11 and the second region 12 each include a plurality of surface elements, and the plurality of surface elements include a first surface element and a second surface element. In the display body 10, the surface element included in the first region 11 is a first surface element, and the surface element included in the second region 12 is a second surface element.

  In the display body 10, the uneven surface 10S is an incident surface on which light is incident. The uneven surface 10 </ b> S reflects the light incident on the uneven surface 10 </ b> S to the light incident side with respect to the display body 10, and the light incident side with respect to the display body 10 is the observation side of the display body 10. The uneven surface 10 </ b> S is composed of a first region 11 and a second region 12. All the surface elements included in the first region 11 are first surface elements, and all the surface elements included in the second region 12 are second surface elements.

  Of the uneven surface 10 </ b> S, the first region 11 is a region that displays an image having a predetermined shape by the light reflected by the first region 11, and the second region 12 is around the first region 11. This is an area for displaying an image as a background of an image displayed in the first area 11 by the light enclosed and reflected by the second area 12.

  The first region 11 is formed by light emitted from the first region 11 with an image having substantially the same shape as that of the first region 11. The first region 71 is a shape that schematically represents a human smile, and includes a region having a circular shape.

  As shown in FIG. 2, the display body 10 includes a base material 21, an uneven structure layer 22, and a reflective layer 23, and the base material 21, the uneven structure layer 22, and the reflective layer 23 are stacked in this order. The base material 21 has a plate shape, and the forming material of the base material 21 is, for example, a resin.

  The concavo-convex structure layer 22 is located on one surface of the substrate 21, and the surface of the concavo-convex structure layer 22 opposite to the surface in contact with the substrate 21 is the concavo-convex surface 22 </ b> S. The concavo-convex structure layer 22 includes a plurality of first protrusions 22 a and a plurality of second protrusions 22 b, and each protrusion is apex on the opposite side of the concavo-convex structure layer 22 from the surface in contact with the substrate 21. have. The 1st convex part 22a and the 2nd convex part 22b have a mutually different shape. The material for forming the uneven structure layer 22 is, for example, a resin.

  The reflective layer 23 covers the uneven surface 22S of the uneven structure layer 22. Of the reflective layer 23, the surface opposite to the surface in contact with the uneven structure layer 22 is the uneven surface 10 </ b> S of the display body 10. Since the reflective layer 23 has a shape that follows the uneven surface 22S of the uneven structure layer 22, the shape of the uneven surface 10S that the reflective layer 23 has is substantially equal to the shape of the uneven surface 22S that the uneven structure layer 22 has.

  Of the concavo-convex surface 10S of the reflective layer 23, in the thickness direction of the display body 10, the portion that overlaps the plurality of first protrusions 22a is the first region 11, and the portion that overlaps the plurality of second protrusions 22b is the second. Region 12. Of the concavo-convex surface 10S of the reflective layer 23, a portion that overlaps one convex portion in the thickness direction of the display body 10 is a surface element, and among the plurality of surface elements, a surface element that overlaps the first convex portion 22a is the first. The portion of the first surface element 11a that overlaps the second convex portion 22b is the second surface element 12a. The material for forming the reflective layer 23 may be, for example, either a metal or a metal compound.

[Configuration of surface elements]
The configuration of the surface element will be described with reference to FIGS. As described above, the display body 10 is configured to include the uneven structure layer 22 and the reflective layer 23, and the surface of the reflective layer 23 is the uneven surface 10 </ b> S of the display body 10. However, the thickness of the reflective layer 23 is about several nanometers to several tens of nanometers, and the shape of the reflective layer 23 is a shape that follows the concave-convex surface 22S of the concave-convex structure layer 22. The shape of the surface 22S can be regarded as the shape of the uneven surface 10S of the display body 10. Therefore, below, the structure of the surface element of the display body 10 is demonstrated using the uneven structure layer 22. FIG.

  FIG. 3 shows a perspective structure of the first convex portion 22 a included in the concave-convex structure layer 22. In the concavo-convex structure layer 22, each first convex portion 22a has the same shape as all the other first convex portions 22a.

  As shown in FIG. 3, the surface of the first convex portion 22 a is the first surface element 31. The first surface element 31 includes a curved surface portion 31a and a flat surface portion 31b, and is configured such that the flat surface portion 31b emits light toward a predetermined fixed point depending on the position of the flat surface portion 31b in the first surface element 31. ing.

  The first surface element 31 is composed of one curved surface portion 31a and one flat surface portion 31b. The first surface element 31 has a shape based on a virtual conical surface C, and has a vertex 31c. The conical surface C has an apex, and the bottom, which is the end of the conical surface C opposite to the apex, has an annular shape.

  Of the first surface element 31, the flat surface portion 31 b is a surface that passes through the apex of the conical surface C, that is, the apex 31 c of the first surface element 31 and any two points on the bottom of the conical surface C. The distance between the vertex 31c of the first surface element 31 and each point on the bottom is equal to each other between the two points on the bottom, whereby the plane portion 31b has an isosceles triangle shape.

  In addition, the distance between the vertex 31c of the first convex portion 22a and each point on the bottom may be different between the two points on the bottom, and the area of the plane portion 31b is different from each other on the vertex 31c and the bottom. Determined by the distance between points. Further, the angle formed by the plane portion 31b and the plane including the bottom of the conical surface C is the inclination angle θ of the plane portion 31b.

  The direction in which the flat portion 31b faces is the direction in which the flat portion 31b faces. A straight line passing through the apex 31c and extending in a direction parallel to the thickness direction of the uneven surface 10S is the rotation axis R. When viewed from the direction facing the apex 31c, the direction in which the plane portion 31b faces is a direction in which a straight line extending through the apex 31c and the bottom side of the plane portion 31b extends in the circumferential direction of the rotation axis R.

  The curved surface portion 31 a of the first surface element 31 has a shape that follows a part of the conical surface C. In the circumferential direction of the rotation axis R, a portion of the conical surface C excluding the flat surface portion 31b is a curved surface portion 31a.

  In addition, when the display body 10 is arranged indoors on a horizontal base and the display body 10 is observed by parallel light of a fluorescent lamp attached to the ceiling, the inclination angle θ is 5 degrees or more and less than 45 degrees. Preferably there is.

  When light enters the concavo-convex surface 10S of the display body 10 from a direction parallel to the thickness direction of the display body 10, in other words, light enters the concavo-convex surface 10S from the normal direction to the two-dimensional plane in which the uneven surface 10S spreads. When the inclination angle θ of the plane portion 31b is smaller, the angle formed by the reflected light emission direction and the incident light incident direction becomes smaller. Even when the display body 10 is arranged on a horizontal base, the observer of the display body 10 does not look from the normal direction with respect to the two-dimensional plane where the uneven surface 10S spreads, but from the direction forming a predetermined angle with the normal direction. The display body 10 may be observed. For this reason, if the inclination angle θ of the flat surface portion 31b is too small, the light emitted from the flat surface portion 31b becomes difficult to be visually recognized by the observer.

On the other hand, if the inclination angle θ of the flat portion 31b is too large, the light incident on the flat portion 31b may be emitted toward the base material 21 of the display body 10 and reflected by the concavo-convex structure layer 22 or the like. For this reason, even if the light reflected by the flat surface portion 31b is emitted to the outside of the display body 10, the light emission direction is not directed toward the observer, or the intensity of the emitted light is visually recognized by the observer. It is lowered to the extent that it is difficult.
In this regard, if the inclination angle θ is 5 degrees or greater and 45 degrees or less, the light emitted from the flat surface portion 31b is easily visible by the observer of the display body 10.

FIG. 4 shows a perspective structure of the second convex portion 22 b included in the concave-convex structure layer 22. Each 2nd convex part 22b has the mutually same shape as all the other 2nd convex parts 22b.
As shown in FIG. 4, the surface of the second convex portion 22 b is the second surface element 32. The second surface element 32 includes a curved surface portion, and the curved surface portion of the second surface element 32 emits light toward a fixed point depending on the position of the curved surface portion of the second surface element 32 in the second surface element 32. It is configured.

  The 2nd surface element 32 is comprised from the conical surface which is an example of a curved surface part. The second surface element 32 has the same shape as the conical surface C of the first surface element 31, but the second surface element 32 has a shape different from the conical surface C, for example, a conical surface It may have a shape with a different height from C or a shape with a different bottom size from the conical surface C.

  FIG. 5 shows an enlarged view of the first convex portion 22a and the second convex portion 22b included in the region A in FIG. In FIG. 5, as in FIGS. 3 and 4, for convenience of illustration and description, the illustration of the reflective layer 23 included in the display body 10 is omitted.

  As shown in FIG. 5, the plurality of first protrusions 22 a and the plurality of second protrusions 22 b are regularly arranged as viewed from a direction orthogonal to the two-dimensional plane in which the uneven structure layer 22 extends. All the protrusions including the plurality of first protrusions 22a and the plurality of second protrusions 22b are arranged in a square lattice pattern. That is, a virtual square lattice L is set on the two-dimensional plane in which the concavo-convex structure layer 22 spreads, and a plurality of convex portions are located one by one on the lattice points LP of the square lattice L.

  The plurality of convex portions may be arranged in a hexagonal lattice shape. In this case, a virtual hexagonal lattice is set on the two-dimensional plane in which the concavo-convex structure layer 22 extends, and the plurality of convex portions may be positioned one by one in the lattice points of the hexagonal lattice.

  According to the configuration in which the plurality of convex portions are arranged in a hexagonal lattice shape, the gap between the adjacent convex portions can be reduced as compared with the configuration in which the plurality of convex portions are arranged in a square lattice shape. Therefore, the image displayed on the display body 10 tends to be denser and brighter.

  Here, it is also possible to partition pixels arranged in a matrix on the uneven surface 10S of the display body 10 and design an image displayed on the display body 10 using the pixels. In this case, for example, after the first region 11 and the second region 12 are set in the concavo-convex surface 10S using image editing software or the like, the first convex portion 22a or the second convex portion 22b is arranged in each pixel. be able to.

  If the plurality of convex portions are arranged in a square lattice, one first convex portion 22a or one second convex portion 22b can be associated with one pixel. Therefore, since the convex portion is located at the pixel boundary, the shape of the convex portion is not changed to a shape other than the shape of the first convex portion 22a or the second convex portion 22b on the image editing software. Therefore, when the concavo-convex structure layer 22 has a convex portion having an unintended shape, light different from the light emitted from the first convex portion 22a or the second convex portion 22b is emitted from the convex portion. Can be suppressed.

[Action of display body]
The operation of the display body will be described with reference to FIG.
As shown in FIG. 6, when the observer observes from a fixed point on the observation side and the fixed point at which the light emitted from the flat surface portion 31 b of the first convex portion 22 a arrives, the observer is positioned in the first region 11. The image formed by the light emitted from the first surface element 31 can be visually recognized.

At this time, the observer visually recognizes the light emitted from the flat portion 31b having a predetermined area as the light emitted from the first region 11. On the other hand, the observer visually recognizes the light emitted from the second surface element 32 that is a curved surface as the light emitted from the second region 12. Therefore, the intensity of light emitted from each second convex portion 22b toward the fixed point becomes low. Therefore, the amount of light per unit area in the second region 12 is smaller than the amount of light per unit area in the first region 11, and the contrast between the first region 11 and the second region 12 is increased.
As a result, the image displayed by the first region 11 and the image displayed by the second region 12 are easily recognized by the observer as different images, and the visibility of each image is improved.

[Manufacturing method of display body]
When manufacturing the display body 10, first, the base material 21 is prepared, and then the uneven structure layer 22 is formed on one surface of the base material 21. Then, the reflective layer 23 is formed on the surface of the concavo-convex structure layer 22 opposite to the surface in contact with the substrate 21.

  In the step of preparing the base material 21, a resin sheet or a resin film formed from a predetermined resin, for example, polycarbonate, polyimide, polyethylene terephthalate, or the like may be prepared.

  In the step of forming the concavo-convex structure layer 22, first, a coating film is formed by applying a thermoplastic resin or a photocurable resin to one surface of the base material 21. In the coating film, the surface opposite to the surface in contact with the substrate 21 is the surface, and a metal stamper is pressed against the surface of the coating film. When the coating film forming material is a thermoplastic resin, the coating film is heated with the stamper pressed against the surface of the coating film. When the coating film forming material is a photocurable resin, the coating film surface is heated. The coating film is irradiated with light while the stamper is pressed, thereby curing the coating film. Then, by removing the stamper from the cured coating film, the concavo-convex structure layer 22 having the concavo-convex surface 22S can be obtained.

  In the step of forming the reflective layer 23, a metal layer or a metal compound layer may be formed as the reflective layer 23 on the concavo-convex surface 22 </ b> S of the concavo-convex structure layer 22 using a sputtering method, a vacuum deposition method, or the like. Thereby, the display body 10 provided with the base material 21, the uneven structure layer 22, and the reflective layer 23 can be obtained.

As described above, according to the first embodiment of the display body, the following effects can be obtained.
(1) When the observer observes the display body 10 from a fixed point, the first surface element 31 emits light from the flat surface portion 31b having a predetermined area, while the second surface element 32 emits light from the curved surface portion. To do. Therefore, the amount of light per unit area in the first region is larger than the amount of light per unit area in the second region, and as a result, an image formed by the first region 11 and an image formed by the second region 12 The visibility of the image displayed on the display body 10 can be improved.

[Modification of First Embodiment]
The first embodiment described above can be implemented with appropriate modifications as follows.
-Each 1st convex part 22a may have a mutually different shape from the other 1st convex part 22a. That is, the first surface element 31 included in each first protrusion 22a may have a shape different from the first surface element 31 included in the other first protrusion 22a.

An example of the shape of the first surface element 31 will be described with reference to FIGS.
FIG. 7 shows a planar structure of the first convex portion 22a as viewed from above. 8 and 9 show a cross-sectional structure taken along line II-II in FIG. In addition, the height of the 1st convex part 22a which FIG. 8 shows differs from the height of the 1st convex part 22a which FIG. 9 shows.
As shown in FIG. 7, the first surface element 31 includes one curved surface portion 31a and one flat surface portion 31b.

  In the first surface element 31 shown in FIG. 8, the height of the first surface element 31 is the first height h1, and the width of the first surface element 31 is the first width w1. The width of the first surface element 31 is the maximum value of the distance between the flat surface portion 31 b and the curved surface portion 31 a at the bottom of the first surface element 31. The inclination angle θ of the plane portion 31b is the first inclination angle θ1.

  In the first surface element 31 shown in FIG. 9, the height of the first surface element 31 is the second height h2 lower than the first height described above, and the width of the first surface element 31 is the first width w1. is there. The inclination angle θ of the planar portion 31b is the second inclination angle θ2, and the second inclination angle θ2 is smaller than the first inclination angle θ1 described above.

  Thus, since the first inclination angle θ1 and the second inclination angle θ2 are different from each other, the first incident angle θα1 of the incident light IL in the plane portion 31b in FIG. 8 and the incident light IL in the plane portion 31b in FIG. The second incident angle θα2 is different from each other. Accordingly, in the first surface element 31 in FIG. 8, a part of the incident light IL is emitted as the first regular reflection light RL1 having an emission angle of the first emission angle θβ1, while the first surface in FIG. In the element 31, a part of the incident light IL is emitted as the second regular reflection light RL2 having an emission angle of the second emission angle θβ2 different from the first emission angle θβ1.

  Of the light emitted from the flat portion 31b in FIG. 8, the light emitted toward the fixed point described above is the first light component PL1, and the light emitted from the flat portion 31b in FIG. 9 is directed toward the fixed point. The emitted light is the second light component PL2. The exit angle of the first light component PL1 is the first exit angle θγ1, the exit angle of the second light component PL2 is the second exit angle θγ2, and the first exit angle θγ1 and the second exit angle θγ2 are mutually different. Different.

  As a result, the amount of light emitted from the first surface element 31 in FIG. 8 toward the fixed point is different from the amount of light emitted from the first surface element 31 in FIG. 9 toward the fixed point. The difference between the second exit angle θβ2 and the second exit angle θγ2 is smaller than the difference between the first exit angle θβ1 and the first exit angle θγ1. Therefore, the light amount per unit area of the light emitted from the first convex portion 22a in FIG. 9 toward the fixed point is the light amount per unit area of the light emitted from the first convex portion 22a in FIG. 8 toward the fixed point. Bigger than.

  8 and the area of the flat portion 31b in FIG. 9 are different from each other, the light amounts of light emitted from the first surface elements 31 are also different from each other.

FIG. 10 shows a planar structure of the first protrusion 22a as viewed from above. FIG. 11 shows a cross-sectional structure taken along line III-III in FIG.
As shown in FIG. 10, the first convex portion 22a includes one curved surface portion 31a and one flat surface portion 31b. The area of the plane part 31b in FIG. 10 is smaller than the area of the plane part 31b in FIG.

  As shown in FIG. 11, the height of the first surface element 31 is the first height h1, while the width of the first surface element 31 is a second width w2 different from the first width w1. The inclination angle θ of the first convex portion 22a is the third inclination angle θ3, and the first inclination angle θ1 of the first surface element 31 in FIG. 8 and the second inclination angle θ2 of the first surface element 31 in FIG. The third inclination angle θ3 is larger than the first inclination angle θ1.

  Thus, the first inclination angle θ1 and the third inclination angle θ3 are different from each other. Therefore, the third incident angle θα3 of the incident light IL in the flat portion 31b in FIG. 11 is different from the first incident angle θα1 described above, and the third emission angle θβ3 of the third regular reflection light RL3 in the flat portion 31b in FIG. Is different from the first emission angle θβ1 described above.

  Of the light emitted from the flat portion 31b in FIG. 11, the light emitted toward the fixed point described above is the third light component PL3, and the third emission angle θγ3 that is the emission angle of the third light component PL3 is: This is an angle different from the first emission angle θγ1 described above. Further, since the difference between the third exit angle θβ3 and the third exit angle θγ3 is smaller than the difference between the first exit angle θβ1 and the first exit angle θγ1, from the first surface element 31 in FIG. 11 toward the fixed point. The amount of light emitted per unit area is larger than the amount of light emitted per unit area from the first surface element 31 toward the fixed point in FIG.

  In addition, on the assumption that the height of the 1st surface element 31 is the same, the area of the plane part 31b becomes large, so that inclination-angle (theta) is small. Therefore, in determining the amount of light emitted from each first surface element 31, it is necessary to consider not only the amount of light emitted per unit area but also the area of the flat surface portion 31b.

  In this way, by changing the height or width of the first surface element 31, in other words, by changing the inclination angle θ or the area of the flat surface portion 31b included in the first surface element 31, each first surface element 31 is fixed to a fixed point. It is possible to change the amount of light emitted toward the head.

  Therefore, if the plurality of first surface elements 31 includes a plurality of types of first surface elements 31 having at least one of height and width different from each other, an image displayed in the first region 11 is displayed with a plurality of gradations. Can be expressed.

  The flat surface portion 31 b included in the first surface element 31 may be a surface that does not pass through at least one of the apex of the conical surface C and the point on the bottom of the conical surface C. Even if it is such a structure, if the 1st surface element is provided with the plane part which injects light toward a fixed point, and the 2nd surface element is the structure provided with the curved surface part which injects light toward a fixed point, the above-mentioned The same effect as (1) can be obtained.

  The first surface element 31 is not limited to the conical surface C, and may have a shape based on a shape having a curved surface such as a cylindrical surface, a hemispherical surface, and a semi-ellipsoidal surface. The cylindrical surface, the hemispherical surface, and the semi-ellipsoidal surface are rotation surfaces having a rotation axis extending along a direction parallel to the normal direction of the two-dimensional plane in which the uneven surface 10S extends. Even if it is such a structure, if the 1st surface element is provided with the plane part which injects light toward a fixed point, and the 2nd surface element is the structure provided with the curved surface part which injects light toward a fixed point, the above-mentioned The same effect as (1) can be obtained.

  The display body 10 may be configured to include a resin coating layer instead of the reflective layer 23. In this case, the coating layer only needs to have a light transmission property, and the refractive index of the coating layer may be different from the refractive index of the uneven structure layer 22. Thereby, the light incident on the display body 10 can be reflected at the interface between the coating layer and the concavo-convex structure layer 22. In such a configuration, the uneven surface 22S of the uneven structure layer 22 is an uneven surface that reflects light.

  The display body 10 does not have to include the reflective layer 23. Even in such a configuration, the uneven surface 22S of the uneven structure layer 22 has a difference between the refractive index of the uneven structure layer 22 and the refractive index of air. The incident light can be reflected not a little.

  -The uneven | corrugated surface 10S of the display body 10 may also contain the surface element comprised only from a plane part. In such a configuration, the display region that is a part of the uneven surface 10S only needs to be configured by a first region that includes only the first surface element and a second region that includes only the second surface element. The same effect as (1) described above can be obtained.

  As shown in FIG. 12, the display body 40 includes a base material 41 and a concavo-convex structure layer 42, and the surface of the concavo-convex structure layer 42 opposite to the surface in contact with the base material 41 is the concavo-convex surface 42S. The concavo-convex structure layer 42 may include a plurality of concave portions. The plurality of recesses include a first recess 42a and a second recess 42b, and the surface of the first recess 42a may be the first surface element and the surface of the second recess 42b may be the second surface element. That is, the surface of the first concave portion 42a may include a curved surface portion and a flat surface portion that emits light toward a fixed point, and the surface of the second concave portion 42b may include a curved surface portion that emits light toward the fixed point. That's fine. Even if it is such a structure, the effect equivalent to (1) mentioned above can be acquired.

  -In the structure demonstrated previously with reference to FIG. 12, the display body 40 may be provided with the reflective layer which covers the uneven structure layer 42, and may be provided with a coating layer. Even if it is such a structure, the effect equivalent to the effect by the uneven structure layer 22 provided with a some convex part can be acquired.

[Second Embodiment]
A second embodiment of the display body will be described with reference to FIGS. The second embodiment differs from the first embodiment in the shapes of the first convex portion and the second convex portion. Therefore, in the following, such differences will be described in detail, and detailed description of the configuration common to the first embodiment will be omitted. Hereinafter, the configuration of the surface elements and the operation of the display body will be described in order.

[Configuration of surface elements]
The configuration of the surface element will be described with reference to FIGS. 13 and 14. Similar to the first embodiment, the display body includes a reflective layer and an uneven structure layer, and the shape of the uneven surface of the uneven structure layer can be regarded as the shape of the uneven surface of the display body. Therefore, below, the structure of the surface element of a display body is demonstrated using an uneven structure layer.

  FIG. 13 shows a perspective structure of the first protrusion 51 provided in the uneven structure layer. In the plurality of first protrusions 51, each first protrusion 51 has the same shape as all the other first protrusions 51.

  As shown in FIG. 13, the surface of the first convex portion 51 is a first surface element 52. The first surface element 52 further includes a synthesis plane part 52c in addition to the curved surface part 52a and the plane part 52b. The first plane element 52 is configured such that the synthesis plane portion 52 c emits light toward a synthesis fixed point different from the fixed point depending on the position of the synthesis plane portion 52 c in the first surface element 52.

  The first surface element 52 includes one curved surface portion 52a, one flat surface portion 52b, and one combining flat surface portion 52c. The first surface element 52 has a shape based on a virtual truncated cone surface TC. The truncated cone surface TC has a top surface, and the bottom portion, which is the end of the truncated cone surface TC opposite to the top surface, has an annular shape like the truncated cone surface C.

  Of the first surface element 52, the flat surface portion 52b is a surface that passes through two arbitrary points on the circumference of the top surface of the truncated cone surface TC and two arbitrary points on the bottom portion of the truncated cone surface TC. The plane part 52b has a trapezoidal shape.

  The curved surface portion 52a of the first surface element 52 has a shape that follows the side surface of the truncated cone surface TC. When viewed from the direction facing the top surface of the truncated cone surface TC, the portion excluding the flat surface portion 52b in the circumferential direction of the side surface of the truncated cone surface TC is the curved surface portion 52a.

  The combining plane portion 52c of the first surface element 52 has a shape that follows the top surface of the truncated cone surface TC. When viewed from the direction facing the top surface of the truncated cone surface TC, the portion excluding the planar portion 52b in the circumferential direction of the top surface of the truncated cone surface TC is the combining planar portion 52c. The combining plane portion 52c is a surface that extends along a direction parallel to the two-dimensional plane in which the uneven surface of the display body extends.

  The combining plane portion 52c of the first surface element 52 is preferably configured to emit scattered light toward the combining fixed point depending on the surface roughness of the combining plane portion 52c.

  FIG. 14 shows a perspective structure of the second protrusion 53 provided in the uneven structure layer. In the plurality of second convex portions 53, each second convex portion 53 has the same shape as all the other second convex portions 53.

  As shown in FIG. 14, the surface of the second convex portion 53 is the second surface element 54. The second surface element 54 further includes a combining plane portion 54b in addition to the curved surface portion 54a. The second surface element 54 is configured such that the combining plane portion 54b of the second surface element 54 emits light toward the combining fixed point depending on the position of the combining plane portion 54b in the second surface element 54. .

  The second surface element 54 is a truncated cone surface, the side surface of the truncated cone surface is an example of a curved surface portion 54a, and the top surface of the truncated cone surface is an example of a synthesis plane portion 54b. The combining plane part 54b is a surface that extends along a direction parallel to the two-dimensional plane in which the uneven surface of the display body extends. The second surface element 54 has the same shape as the truncated cone surface TC in the first surface element 52, but the second surface element 54 has a shape different from the truncated cone surface TC. It may have a shape with a different height from TC or a shape with a different bottom size from the truncated cone surface TC.

  The combining plane portion 54b of the second surface element 54 is preferably configured to emit scattered light toward the combining fixed point depending on the surface roughness of the combining plane portion 54b.

[Action of display body]
The operation of the display body will be described with reference to FIGS. 15 and 16.
As shown in FIG. 15, the uneven surface 60 </ b> S of the display body 60 includes a first region 61 and a second region 62 surrounding the first region 61, as in the first embodiment. In the thickness direction of the display body 60, the plurality of first protrusions 51 are arranged in a portion overlapping the first region 61, and the plurality of second protrusions 53 are arranged in a portion overlapping the second region 62.

  When the observer of the display body 60 observes the display body 60 from a fixed point, the observer can visually recognize an image formed by the light emitted from each first surface element 52 located in the first region 61. . In addition, the observer can visually recognize an image formed by the light emitted from each second surface element 54 located in the second region 62.

  As described above, since the contrast between the first region 61 and the second region 62 is large, the image displayed by the first region 61 and the image displayed by the second region 62 are easily visually recognized as different images. As a result, the visibility of each image is increased.

  On the other hand, as shown in FIG. 16, when the observer observes the display body 60 from a fixed point for synthesis, that is, a point located in a normal direction with respect to the two-dimensional plane in which the uneven surface 60S spreads, The light emitted from the combining planar portion 52 c of the first surface element 52 and the light emitted from the combining planar portion 54 b of the second surface element 54 are visually recognized. Therefore, in the light visually recognized by the observer, the light amount per unit area of the light emitted from the first region 61 and the light amount per unit area of the light emitted from the second region 62 are substantially equal. Thereby, the observer can visually recognize one image obtained by combining the light emitted from the first region 61 and the light emitted from the second region 62.

If each synthesis plane part emits scattered light, the range of emission angles in the light emitted from the synthesis plane part is widened. Therefore, in the visual recognition direction when the observer observes the display body, the range in which one image formed by the entire uneven surface can be visually recognized can be expanded.
Thus, according to the display body 60, two types of images different from each other can be formed by the light emitted from the uneven surface 60S.

As described above, according to the second embodiment of the display body, in addition to the effect (1) described above, the following effect can be obtained.
(2) When the observer visually recognizes the display body 60 from a fixed point, the display body 60 is caused by the difference between the light amount emitted from the first region 61 and the light amount emitted from the second region 62. The image formed by the first region 61 and the image formed by the second region 62 can be displayed toward the observer. On the other hand, when the observer visually recognizes the display body 60 from the synthesis fixed point, the difference in the amount of light between the light emitted from the first region 61 and the light emitted from the second region 62 becomes small. The display body 60 can display one image obtained by combining the light emitted from the first region 61 and the light emitted from the second region 62 toward the observer. Therefore, the display body 60 can display different images toward different fixed points.

  (3) If each combining plane portion emits scattered light, the range of the emission angle in the light emitted from each combining plane portion is widened, so the viewing direction when the observer observes the display body The range in which one image formed by the entire uneven surface can be visually recognized can be expanded.

[Modification of Second Embodiment]
Note that the second embodiment described above can be implemented with appropriate modifications as follows.
Each flat surface portion for synthesis may be a flat surface. That is, the combining plane portion emits light only in a predetermined emission angle range including the regular reflection emission angle, and emits the light so that the light quantity at the regular reflection emission angle is maximized. The structure which injects may be sufficient. Even in such a configuration, the first plane element includes a synthesis plane portion that emits light toward the synthesis fixed point, and the second plane element emits light toward the synthesis fixed point. If it is provided, the same effect as (2) described above can be obtained.

  -Each synthesis plane part may be a surface that extends along a plane that intersects the two-dimensional plane in which the uneven surface 60S extends. According to such a configuration, although the position of the synthesis fixed point on the observation side of the display body 60 is different from the configuration in which each synthesis plane portion extends along a plane parallel to the two-dimensional plane in which the uneven surface 60S extends, The same effect as (2) described above can be obtained.

  -The 1st surface element 52 and the 2nd surface element 54 do not need to have the shape based on a truncated cone surface, respectively. In short, the first surface element 52 includes a flat surface portion that emits light toward a fixed point, a curved surface portion, and a combining flat surface portion that emits light toward a fixed point for combining, and the second surface element 54. However, what is necessary is just to provide the curved surface part which inject | emits light toward a fixed point, and the synthetic | combination plane part which inject | emits light toward the fixed point for a synthesis | combination. With such a configuration, the same effect as (2) described above can be obtained.

[Third Embodiment]
A third embodiment of the display body will be described with reference to FIGS. 3rd Embodiment differs in the number of the area | regions which the uneven | corrugated surface of a display body contains compared with 1st Embodiment. Therefore, in the following, such differences will be described in detail, and detailed description of the configuration common to the first embodiment will be omitted. In addition, below, the structure of a display body, the structure of a surface element, and the effect | action of a display body are demonstrated in order.

[Configuration of the display body]
The configuration of the display body will be described with reference to FIG.
As shown in FIG. 17, the display body 70 has a plate shape extending along the X direction as one direction and the Y direction orthogonal to the X direction, and a direction orthogonal to the X direction and the Y direction. It has a predetermined thickness along the Z direction.

  The uneven surface 70S of the display body 70 includes a first region 71 and a second region 72, as in the display body 10 of the first embodiment. The uneven surface 70S further includes a third region 73, a fourth region 74, and a fifth region 75 whose positions on the uneven surface 70S are different from the first region 71 and the second region 72. The third region 73, the fourth region 74, and the fifth region 75 each include a plurality of surface elements. The plurality of surface elements constituting the uneven surface 70S further include a third surface element in addition to the first surface element and the second surface element described above.

  The first region 71, the third region 73, the fourth region 74, and the fifth region 75 have different positions on the uneven surface 70S, and among the uneven surface 70S, the first region 71, the third region 73, the fourth region 70S. A portion other than the region 74 and the fifth region 75 is filled with the second region 72.

  In the uneven surface 70S, the first region 71 and the third region 73 are arranged along the Y direction, and the first region 71 and the fourth region 74 are arranged along the X direction. In the uneven surface 70S, the third region 73 and the fifth region 75 are arranged along the X direction, and the fourth region 74 and the fifth region 75 are arranged along the Y direction. In the display body 70, the state in which the first area 71, the third area 73, the fourth area 74, and the fifth area 75 are arranged in this way in the X direction and the Y direction is the initial state of the display body 70. State.

  Each of the first region 71, the third region 73, the fourth region 74, and the fifth region 75 has a different shape. Each region is formed by light emitted from each region with an image having substantially the same shape as each region. The first region 71 has a shape that schematically represents a human smile, the third region 73 has a star shape, and the fourth region 74 has a crescent shape. The fifth region 75 has a shape representing the sun, and is composed of a region having a circular shape and a region having a plurality of triangles arranged along the circumferential direction of the region having the circular shape.

[Configuration of surface elements]
With reference to FIGS. 18 to 21, the configuration of the surface elements included in each region will be described. Similar to the first embodiment, the display body 70 is configured to include a reflective layer and an uneven structure layer, and the shape of the uneven surface of the uneven structure layer is regarded as the shape of the uneven surface 70S of the display body 70. Can do. Therefore, below, the structure of the surface element of the display body 70 is demonstrated using an uneven | corrugated structure layer.

  Moreover, the several surface element with which the 2nd area | region 72 is provided is a 2nd surface element which is a conical surface similarly to the display body 10 of 1st Embodiment. Therefore, below, the description about the structure of the surface element with which the 2nd area | region 72 is provided is abbreviate | omitted. Hereinafter, the configuration of each surface element in the display body 70 in the initial state will be described.

FIG. 18 shows a planar structure in which the first convex portion 81 included in the concavo-convex structure layer is viewed from above.
As shown in FIG. 18, the surface of the first convex portion 81 is a first surface element 82, and the first surface element 82 is composed of one curved surface portion 82a and one flat surface portion 82b. The first surface element 82 is configured such that the flat surface portion 82 b emits light toward the first fixed point depending on the position of the flat surface portion 82 b in the first surface element 82.

  The 1st surface element 82 has the shape based on the virtual conical surface C similarly to the 1st surface element 31 of 1st Embodiment, and has the vertex 82c. The plane part 82b has a triangular shape and extends along a plane having a predetermined inclination with respect to the ZX plane. The direction in which the flat portion 82b faces is the direction in which the flat portion 82b faces. When the rotation axis is a straight line that passes through the vertex 82c and extends in the Z direction, the planar portion 82b faces in a predetermined direction in the circumferential direction of the rotation axis in a plan view facing the vertex 82c. .

  FIG. 19 shows a planar structure in which the third protrusion 83 provided in the uneven structure layer is viewed from above. The concavo-convex structure layer includes a plurality of third convex portions 83, and each third convex portion 83 has the same shape as all the other third convex portions 83.

  As FIG. 19 shows, the surface of the 3rd convex part 83 is the 3rd surface element 84, and the 3rd surface element 84 contains the curved surface part 84a and the plane part 84b. The third surface element 84 is configured such that the flat surface portion 84b emits light toward a second fixed point different from the first fixed point depending on the position of the flat surface portion 84b in the third surface element 84. The surface element included in the third region 73 is a third surface element 84. In other words, the third region 73 includes only the third surface element 84 as the surface element.

  Similar to the first surface element 82, the third surface element 84 has a shape based on a virtual conical surface C and has a vertex 84c. The plane portion 84b has a triangular shape and extends along a plane having a predetermined inclination with respect to the ZY plane. When the rotation axis is a straight line that passes through the vertex 84c and extends in the Z direction, the direction in which the plane portion 84b faces in the plan view facing the vertex 84c is the first surface element 82 in the circumferential direction of the rotation axis. It differs by 90 degrees counterclockwise with respect to the direction in which the flat portion 82b faces.

  FIG. 20 shows a planar structure in which the fourth convex portion 85 provided in the concavo-convex structure layer is viewed from above. The concavo-convex structure layer includes a plurality of fourth convex portions 85, and each fourth convex portion 85 has the same shape as all the other fourth convex portions 85.

  As shown in FIG. 20, the surface of the fourth convex portion 85 is the fourth surface element 86, and the fourth surface element 86 includes a curved surface portion 86a and a flat surface portion 86b. According to the position of the plane portion 86b of the fourth plane element 86, the plane portion 86b of the fourth plane element 86 emits light toward the first fixed point and the third fixed point different from the second fixed point. It is configured to inject. The surface element included in the fourth region 74 is a fourth surface element 86. In other words, the fourth region 74 includes only the fourth surface element 86 as the surface element.

  Similar to the first surface element 82, the fourth surface element 86 has a shape based on a virtual conical surface C, and has a vertex 86c. The plane part 86b has a triangular shape and extends along a plane having a predetermined inclination with respect to the ZY plane. When the rotation axis is a straight line that passes through the vertex 86c and extends in the Z direction, the direction in which the plane portion 86b faces in the plan view facing the vertex 86c is the first surface element 82 in the circumferential direction of the rotation axis. It differs by 270 degrees counterclockwise with respect to the direction in which the flat portion 82b faces.

  FIG. 21 shows a planar structure in which the fifth convex portion 87 included in the concavo-convex structure layer is viewed from above. The concavo-convex structure layer includes a plurality of fifth convex portions 87, and each fifth convex portion 87 has the same shape as all the other fifth convex portions 87.

  As shown in FIG. 21, the surface of the fifth convex portion 87 is a fifth surface element 88, and the fifth surface element 88 includes a curved surface portion 88a and a flat surface portion 88b. In the fifth surface element 88, the flat surface portion 88b emits light toward a fourth fixed point different from the first fixed point, the second fixed point, and the third fixed point, depending on the position of the flat surface portion 88b in the fifth surface element 88. It is configured as follows. The surface element included in the fifth region 75 is a fifth surface element 88. That is, the fifth region 75 includes only the fifth surface element 88 as the surface element.

  Similar to the first surface element 82, the fifth surface element 88 has a shape based on a virtual conical surface C and has a vertex 88c. The plane portion 88b has a triangular shape and extends along a plane having a predetermined inclination with respect to the ZX plane. When the rotation axis is a straight line that passes through the vertex 88c and extends in the Z direction, the planar surface 88b faces the first surface element 82 in the circumferential direction of the rotation axis in a plan view facing the vertex 88c. Is different from the plane portion 82b by 180 degrees counterclockwise.

  The plurality of surface elements included in the second region 72 are second surface elements that are conical surfaces, like the display body 10 of the first embodiment, and the entire second surface element is configured by a curved surface portion. Yes. Therefore, the second surface element is configured to emit light from the curved surface portion toward each of the second fixed point, the third fixed point, and the fourth fixed point as well as the first fixed point described above.

  In addition, when four types of surface elements that are different from each other by 90 degrees in the circumferential direction of the rotation axis are formed, four points that divide the bottom portion of the conical surface C into four equal parts are set. A plane passing through two points adjacent to each other in the circumferential direction of the bottom and the apex of the conical surface C may be defined as one display plane. Thereby, it is possible to make the inclination angle and the area in the plane portion equal among the four types of surface elements.

[Action of display body]
The operation of the display body will be described with reference to FIGS. In the following, in a plan view facing the uneven surface 70S, a straight line that passes through the center of the uneven surface 70S and extends along the Z direction is set as the rotation axis R, and the viewer sees the display body 70 and the visual recognition. An operation of the display body 70 when the display body 70 is rotated around the rotation axis R in a state where the direction to be fixed is fixed will be described.

  As shown in FIG. 22, when the display body 70 is in the initial state, in the first surface element 82, the flat surface portion 82b can emit light toward the observer. On the other hand, in the third surface element 84, the fourth surface element 86, and the fifth surface element 88, the plane portion included in each surface element cannot emit light toward the observer, The curved surface portion included in each surface element can emit light toward the observer.

  Therefore, the amount of light per unit area of the light emitted from the first region 71 toward the observer is per unit area of the light emitted toward the viewer from the portion other than the first region 71 on the uneven surface 70S. It becomes larger than the amount of light. Therefore, the observer can visually recognize an image formed by the first region 71 and an image formed by a portion other than the first region 71 on the uneven surface 70S.

  As shown in FIG. 23, the display body 70 is rotated clockwise by 90 degrees about the rotation axis R. The direction in which the flat surface portion 84b of the third surface element 84 faces differs from the flat surface portion 82b of the first surface element 82 by 90 degrees in the circumferential direction of the rotation axis R. Therefore, the flat surface portion 84b of the third surface element 84 can emit light toward the observer. On the other hand, in the 1st surface element 82, the 4th surface element 86, and the 5th surface element 88, the curved-surface part with which each surface element is provided can inject | emit light toward an observer.

  Therefore, the amount of light per unit area of the light emitted from the third region 73 toward the observer per unit area of the light emitted toward the viewer from the portion other than the third region 73 on the uneven surface 70S. It becomes larger than the amount of light. As a result, the observer can visually recognize an image formed by the third region 73 and an image formed by a portion other than the third region 73 on the uneven surface 70S.

  As shown in FIG. 24, the display body 70 is further rotated 90 degrees clockwise around the rotation axis R. That is, the display body 70 is rotated 180 degrees clockwise around the rotation axis R with respect to the initial state.

  The direction in which the flat surface portion 88b of the fifth surface element 88 faces differs by 180 degrees counterclockwise in the circumferential direction of the rotation axis R with respect to the direction in which the flat surface portion 82b of the first surface element 82 faces. Therefore, the flat surface portion 88b of the fifth surface element 88 can emit light toward the observer. On the other hand, in the 1st surface element 82, the 3rd surface element 84, and the 4th surface element 86, the curved-surface part with which each surface element is provided can inject | emit light toward an observer.

  Therefore, the amount of light per unit area of the light emitted from the fifth region 75 toward the observer is the amount of light per unit area of the light emitted from the uneven surface 70S other than the fifth region 75 toward the viewer. Bigger than. As a result, the observer can visually recognize an image formed by the fifth region 75 and an image formed by a portion other than the fifth region 75 on the uneven surface 70S.

  As shown in FIG. 25, the display body 70 is further rotated 90 degrees clockwise around the rotation axis R. That is, the display body 70 is rotated 270 degrees clockwise around the rotation axis R with respect to the initial state.

  The direction in which the flat surface portion 86b of the fourth surface element 86 faces differs from the direction in which the flat surface portion 82b of the first surface element 82 faces in the circumferential direction of the rotation axis R by 270 degrees counterclockwise. Therefore, the flat surface portion 86b of the fourth surface element 86 can emit light toward the observer. On the other hand, in the 1st surface element 82, the 3rd surface element 84, and the 5th surface element 88, the curved-surface part with which each surface element is provided can inject | emit light toward an observer.

  Therefore, the amount of light per unit area of the light emitted from the fourth region 74 toward the observer is the amount of light per unit area of the light emitted from the uneven surface 70S other than the fourth region 74 toward the viewer. Bigger than. As a result, the observer can visually recognize an image formed by the fourth region 74 and an image formed by a portion other than the fourth region 74 on the uneven surface 70S.

As described above, according to the third embodiment of the display body, in addition to the effect (1) described above, the following effects can be obtained.
(4) The display body 70 has a difference between the light amount per unit area of the light emitted from the first region 71 and the light amount per unit area of the light emitted from the second region 72 toward the first fixed point. Thus, an image formed by the first region 71 and an image formed by the second region 72 can be displayed. Further, the display body 70 has a difference between the light amount per unit area of the light emitted from the third region 73 and the light amount per unit area of the light emitted from the second region 72 toward the second fixed point. The image formed by the third region 73 and the image formed by the second region 72 can also be displayed.

[Modification of Third Embodiment]
The concavo-convex surface 70S is at least one region other than the first region 71 and the second region 72, and the first region 71 and the second region 72 include a region where the positions on the concavo-convex surface 70S do not overlap. Just do it. And the area | region different from the 1st area | region 71 and the 2nd area | region 72 should just be the structure containing the 3rd surface element different from a 1st surface element and a 2nd surface element as a surface element. According to such a configuration, an effect equivalent to (4) described above can be obtained.

  -Between the 1st surface element 82, the 3rd surface element 84, the 4th surface element 86, and the 5th surface element 88, at least one of the height and the width | variety mentioned above in each surface element may differ from each other. That is, at least one of the inclination angle θ and the area in the plane portion included in each surface element may be different from each other. According to such a configuration, the brightness of the images can be made different between the images formed by the first region 71, the third region 73, the fourth region 74, and the fifth region 75, respectively.

  -You may implement in combination with the structure of 2nd Embodiment. That is, each surface element may have a shape based on a truncated cone surface and a composition plane portion. Even in such a configuration, the uneven surface 70S includes the third region 73, and the third region 73 includes a third surface element including a plane portion that emits light toward the second fixed point. The effect equivalent to (4) described above can be obtained.

  -Of the plurality of regions included in the concavo-convex surface 70S, in the region excluding the second region 72, the shape of each region may be the same as the shape of all other regions. According to such a configuration, by rotating the display body 70 around the rotation axis R, the display body 70 is an image having the same shape as each other, and is positioned at different portions on the uneven surface 70S. An image can be formed.

[Fourth Embodiment]
A fourth embodiment in which the display body of the present invention is embodied will be described with reference to FIGS. 4th Embodiment differs in the number of the area | regions which the uneven | corrugated surface of a display body contains compared with 1st Embodiment. Therefore, in the following, such differences will be described in detail, and detailed description of the configuration common to the first embodiment will be omitted. In addition, below, the structure of a display body, the structure of a surface element, and the effect | action of a display body are demonstrated in order.

[Configuration of the display body]
The configuration of the display body will be described with reference to FIG.
As shown in FIG. 26, the display body 90 has a plate shape that extends along the X direction and the Y direction, and has a predetermined thickness along the Z direction. The uneven surface 90 </ b> S of the display body 90 further includes a third region 93 in addition to the first region 91 and the second region 92. The third region 93 differs from the second region 92 in the position on the uneven surface 90S and includes a plurality of surface elements. A part of the third region 93 overlaps a part of the first region 91. That is, the third region 93 includes a first portion 93 a that does not overlap the first region 91 and a second portion 93 b that overlaps the first region 91.

  The uneven surface 90 </ b> S further includes a fourth region 94. The fourth region 94 is different from the second region 92 in the position on the uneven surface 90S and includes a plurality of surface elements. A part of the fourth region 94 overlaps a part of the first region 91. In other words, the fourth region 94 includes a first portion 94 a that does not overlap the first region 91 and a second portion 94 b that overlaps the first region 91.

  In the uneven surface 90S, a part of the third region 93 and a part of the fourth region 94 overlap with a part of the first region 91, respectively, and the first region 91 and the third region 93 of the uneven surface 90S. In addition, the second region 92 fills a portion other than the fourth region 94.

  In other words, the first region 91 includes a first portion 91a, a second portion 91b, and a third portion 91c. The first portion 91 a is a portion that does not overlap with either the third region 93 or the fourth region 94. The second portion 91 b overlaps with a part of the third region 93 and is the same portion as the second portion 93 b of the third region 93. The third portion 91 c is a portion that overlaps a part of the fourth region 94 and is the same portion as the second portion 94 b of the fourth region 94.

  In the uneven surface 90S, the first portion 93a of the third region 93, the first region 91, and the first portion 94a of the fourth region 94 are arranged along the arrangement direction intersecting the Y direction. The angle formed by the Y direction and the arrangement direction is approximately 45 degrees. In the display 90, the state in which the first region 91, the third region 93, and the fourth region 94 are arranged in this way in the X direction and the Y direction is the initial state of the display 90.

  Each of the 1st field 91, the 3rd field 93, and the 4th field 94 has a mutually different shape. Each region is formed by light emitted from each region with an image having substantially the same shape as each region. The first region 91 has a shape that schematically represents a human smile, the third region 93 has a star shape, and the fourth region 94 has a shape that represents the sun.

[Configuration of surface elements]
With reference to FIGS. 27 to 31, the configuration of the surface elements included in each region will be described. Similar to the first embodiment, the display body 90 includes a reflective layer and an uneven structure layer, and the shape of the uneven surface of the uneven structure layer is regarded as the shape of the uneven surface 90S of the display body 90. Can do. Therefore, below, the structure of the surface element of a display body is demonstrated using an uneven structure layer.

  Moreover, the several surface element with which the 2nd area | region 92 is provided is a 2nd surface element which is a conical surface similarly to the display body 10 of 1st Embodiment. Therefore, below, the description about the structure of the surface element with which the 2nd area | region 92 is provided is abbreviate | omitted.

FIG. 27 shows a planar structure of the first protrusion 101 provided in the concavo-convex structure layer as viewed from above.
As shown in FIG. 27, the surface of the first convex portion 101 is the first surface element 102, and the first surface element 102 includes one curved surface portion 102a and one flat surface portion 102b. The first surface element 102 is configured such that the flat surface portion 102b emits light toward the first fixed point depending on the position of the flat surface portion 102b in the first surface element 102.

  The 1st surface element 102 has the shape based on the virtual conical surface C similarly to the 1st surface element 31 of 1st Embodiment, and has the vertex 102c. The plane portion 102b has a triangular shape and extends along a plane having a predetermined inclination with respect to the ZX plane. When the rotation axis is a straight line that passes through the vertex 102c and extends in the Z direction, the planar portion 102b faces in a predetermined direction in the circumferential direction of the rotation axis in a plan view facing the vertex 102c. .

  FIG. 28 shows a planar structure in which the third protrusion 103 provided in the concavo-convex structure layer is viewed from above. The concavo-convex structure layer includes a plurality of third protrusions 103, and each third protrusion 103 has the same shape as all the other third protrusions 103.

  As shown in FIG. 28, the surface of the third convex portion 103 is the third surface element 104, and the third surface element 104 includes a curved surface portion 104a and a flat surface portion 104b. The third surface element 104 is configured such that the flat surface portion 104b of the third surface element 104 emits light toward a second fixed point different from the first fixed point depending on the position of the flat surface portion 104b in the third surface element 104. ing. A surface element included in the first portion 93 a that is a portion that does not overlap the first region 91 in the third region 93 is the third surface element 104. That is, the third region 93 includes only the third surface element 104 as a surface element.

  The 3rd surface element 104 has the shape based on the virtual conical surface C similarly to the 1st surface element 102, and has the vertex 104c. The plane portion 104b has a triangular shape and extends along a plane having a predetermined inclination with respect to the ZY plane. When a straight line that passes through the vertex 104c and extends in the Z direction is a rotation axis, the planar portion 104b faces in the plan view facing the vertex 104c and the planar portion 102b of the first surface element 102 faces in the plan view. Is different by 90 degrees counterclockwise in the circumferential direction of the rotation axis.

  FIG. 29 shows a planar structure in which the fourth convex portion 105 provided in the concavo-convex structure layer is viewed from above. The concavo-convex structure layer includes a plurality of fourth protrusions 105, and each fourth protrusion 105 has the same shape as all the other fourth protrusions 105.

  As shown in FIG. 29, the surface of the fourth convex portion 105 is a fourth surface element 106, and the fourth surface element 106 includes a curved surface portion 106a, a first flat surface portion 106b, and a second flat surface portion 106c. Yes. The fourth surface element 106 emits light toward the first fixed point according to the position of the first flat surface portion 106b in the fourth surface element 106, and the fourth surface element 106 according to the position of the second flat surface portion 106c in the fourth surface element 106. It is configured to emit light toward two fixed points. A surface element included in the second portion 91 b that is a portion overlapping the third region 93 in the first region 91 is a fourth surface element 106. That is, the second portion 91b of the first region 91, in other words, the second portion 93b of the third region 93 includes only the fourth surface element 106 as a surface element.

  The 4th surface element 106 has the shape based on the virtual conical surface C similarly to the 1st surface element 102, and has the vertex 106d. The first plane portion 106b has a triangular shape and extends along a plane having a predetermined inclination with respect to the ZX plane. The direction in which the first flat surface portion 106b faces is equal to the direction in which the flat surface portion 102b of the first surface element 102 faces.

  In contrast, the second plane portion 106c has a triangular shape and extends along a plane having a predetermined inclination with respect to the ZY plane. The direction in which the second flat surface portion 106c faces is different from that of the first flat surface portion 106b. When a straight line passing through the vertex 106d and extending along the Z direction is a rotation axis, the direction in which the second plane portion 106c faces and the direction in which the first plane portion 106b faces in a plan view facing the vertex 106d In the circumferential direction of the rotating shaft, it differs by 90 degrees counterclockwise.

  In the circumferential direction of the rotation axis, the first flat surface portion 106b and the second flat surface portion 106c are in contact with each other, and the curved surface portion 106a is in contact with the first flat surface portion 106b and the second flat surface portion 106c. In other words, the curved surface portion 106a is sandwiched between the first flat surface portion 106b and the second flat surface portion 106c in the circumferential direction of the rotation axis.

  FIG. 30 shows a planar structure in which the fifth convex portion 107 provided in the concavo-convex structure layer is viewed from above. The concavo-convex structure layer includes a plurality of fifth convex portions 107, and each fifth convex portion 107 has the same shape as all the other fifth convex portions 107.

  As shown in FIG. 30, the fifth surface element 108 includes a curved surface portion 108a and a flat surface portion 108b. According to the position of the flat surface portion 108b in the fifth surface element 108, the fifth surface element 108 is directed to the first fixed point and the third fixed point different from the second fixed point by the flat surface portion 108b of the fifth surface element 108. It is configured to inject. A surface element included in the first portion 94 a that is a portion that does not overlap the first region 91 in the fourth region 94 is a fifth surface element 108. That is, the first portion 94a of the fourth region 94 includes only the fifth surface element 108 as the surface element.

  Similar to the first surface element 102, the fifth surface element 108 has a shape based on a virtual conical surface C and has a vertex 108c. The plane part 108b has a triangular shape and extends along a plane having a predetermined inclination with respect to the ZX plane. When the rotation axis is a straight line that passes through the vertex 108c and extends in the Z direction, the planar surface 108b faces the first surface element 102 in the circumferential direction of the rotation axis in a plan view facing the vertex 108c. It differs by 180 degrees counterclockwise with respect to the direction in which the flat portion 102b faces. The direction in which the flat surface portion 108b faces differs from the direction in which the flat surface portion 104b of the third surface element 104 faces in the plan view facing the vertex 108c by 90 degrees counterclockwise in the circumferential direction of the rotation axis.

  FIG. 31 shows a planar structure in which the sixth convex portion 109 provided in the concavo-convex structure layer is viewed from above. The concavo-convex structure layer includes a plurality of sixth convex portions 109, and each sixth convex portion 109 has the same shape as all the other sixth convex portions 109.

  As shown in FIG. 31, the surface of the sixth convex portion 109 is a sixth surface element 110, and the sixth surface element 110 includes a curved surface portion 110a, a first flat surface portion 110b, and a second flat surface portion 110c. Yes. The sixth surface element 110 emits light toward the first fixed point depending on the position of the first flat surface portion 110b in the sixth surface element 110, and the sixth surface element 110 changes depending on the position of the second flat surface portion 110c in the sixth surface element 110. It is configured to emit light toward two fixed points. The surface element included in the third portion 91 c that is a portion overlapping the fourth region 94 in the first region 91 is the sixth surface element 110. That is, the third portion 91c of the first region 91, in other words, the second portion 94b of the fourth region 94 includes only the sixth surface element 110 as a surface element.

  Similar to the first surface element 102, the sixth surface element 110 has a shape based on a virtual conical surface C and has a vertex 110d. The first plane portion 110b has a triangular shape and extends along a plane having a predetermined inclination with respect to the ZX plane. The direction in which the first plane portion 110b faces is equal to the direction in which the plane portion 102b of the first surface element 102 faces.

  On the other hand, the second plane part 110c has a triangular shape and extends along a plane having a predetermined inclination with respect to the ZX plane. When a straight line passing through the vertex 110d and extending along the Z direction is a rotation axis, the direction in which the second plane portion 110c faces in the plan view facing the vertex 110d is relative to the direction in which the first plane portion 110b faces. Thus, it differs by 180 degrees counterclockwise in the circumferential direction of the rotation axis.

  In the sixth surface element 110, the curved surface portion 110a is located between the first flat surface portion 110b and the second flat surface portion 110c. The curved surface portion 110a of the sixth surface element 110 is composed of a first portion 110a1 and a second portion 110a2, and a plane portion and a part of the curved surface portion 110a are alternately arranged in the circumferential direction of the rotation axis. That is, in the circumferential direction of the rotation axis, the first flat surface portion 110b, the first portion 110a1 of the curved surface portion 110a, the second flat surface portion 110c, and the second portion 110a2 of the curved surface portion 110a are arranged in this order.

  Since the first plane part 110b and the second plane part 110c are not in contact with each other, the light emitted from the first plane part 110b and the second plane are compared with the configuration in which the first plane part and the second plane part are in contact with each other. It is possible to reduce the possibility that both the light emitted from the portion 110c and the light are simultaneously viewed by the observer. Therefore, mixing of the image formed by the first plane part 110b and the image formed by the second plane part 110c is suppressed, and the image formed by the first plane part 110b and the image formed by the second plane part 110c are suppressed. Visibility can be improved respectively.

  Note that the plurality of surface elements included in the second region 92 are second surface elements that are conical surfaces, like the display body 10 of the first embodiment, and the entire second surface element is configured by a curved surface portion. Yes. Therefore, the second surface element is configured to emit light from the curved surface portion toward not only the first fixed point described above but also the second fixed point and the third fixed point.

[Action of display body]
The operation of the display body will be described with reference to FIGS. In the following, in a plan view facing the uneven surface 90S, a straight line that passes through the center of the uneven surface 90S and extends along the Z direction is set as the rotation axis R, and the viewer can visually recognize the display body 90. The operation of the display body 90 when the display body 90 is rotated around the rotation axis R in a state where the direction to be fixed is fixed will be described.

  As shown in FIG. 32, when the display body 90 is in the initial state, the flat surface portion 102b of the first surface element 102, the first flat surface portion 106b of the fourth surface element 106, and the first flat surface of the sixth surface element 110. The unit 110b can emit light toward the observer.

  On the other hand, the flat surface portion 104b of the third surface element 104, the second flat surface portion 106c of the fourth surface element 106, the flat surface portion 108b of the fifth surface element 108, and the second flat surface portion 110c of the sixth surface element 110. Cannot emit light toward the observer. On the other hand, the curved surface portion 104a of the third surface element 104 and the curved surface portion 108a of the fifth surface element 108 can emit light toward the observer.

  Therefore, the amount of light per unit area of the light emitted from the first region 91 toward the observer is per unit area of the light emitted toward the viewer from a portion other than the first region 91 on the uneven surface 90S. It becomes larger than the amount of light. Therefore, the observer can visually recognize the image formed by the first region 91 and the image formed by a portion other than the first region 91 on the uneven surface 90S.

  As shown in FIG. 33, the display body 90 is rotated 90 degrees clockwise around the rotation axis R. The direction in which each of the flat surface portion 104b of the third surface element 104 and the second flat surface portion 106c of the fourth surface element 106 faces is relative to the flat surface portion 102b of the first surface element 102 in the circumferential direction of the rotation axis R. It differs by 90 degrees counterclockwise.

  Therefore, the plane part 104b of the 3rd surface element 104 and the 2nd plane part 106c of the 4th surface element 106 can irradiate light toward an observer. On the other hand, in the 1st surface element 102, the 5th surface element 108, and the 6th surface element 110, the curved surface part of each surface element can irradiate light toward an observer.

  Therefore, the amount of light per unit area of the light emitted from the third region 93 toward the observer per unit area of the light emitted toward the viewer from the portion other than the third region 93 on the uneven surface 90S. It becomes larger than the amount of light. As a result, the observer can visually recognize an image formed by the third region 93 and an image formed by a portion other than the third region 93 on the uneven surface 90S.

  As shown in FIG. 34, the display body 90 is further rotated 90 degrees clockwise around the rotation axis R. That is, the display body 90 is rotated clockwise by 180 degrees around the rotation axis R with respect to the initial state.

  The direction in which each of the planar portion 108b of the fifth surface element 108 and the second planar portion 110c of the sixth surface element 110 faces is relative to the planar portion 102b of the first surface element 102 in the circumferential direction of the rotation axis R. It differs by 180 degrees counterclockwise.

  Therefore, the flat part 108b of the fifth surface element 108 and the second flat part 110c of the sixth surface element 110 can emit light toward the observer. On the other hand, in the first surface element 102, the third surface element 104, and the fourth surface element 106, the curved surface portion of each surface element can emit light toward the observer.

  Therefore, the amount of light per unit area of the light emitted from the fourth region 94 toward the observer per unit area of the light emitted toward the viewer from a portion other than the fourth region 94 on the uneven surface 90S. It becomes larger than the amount of light. As a result, the observer can visually recognize an image formed by the fourth region 94 and an image formed by a portion other than the fourth region 94 on the uneven surface 90S.

  As shown in FIG. 35, the display body 90 is further rotated 90 degrees clockwise around the rotation axis R. That is, the display body 90 is rotated clockwise by 270 degrees around the rotation axis R with respect to the initial state.

  Here, as described above, each surface element included in the uneven surface 90S faces counterclockwise by 270 degrees in the circumferential direction of the rotation axis R with respect to the direction in which the flat surface portion 102b of the first surface element 102 faces. It does not include planes with different directions. Therefore, in all the surface elements included in the uneven surface 90S, the curved surface part emits light toward the observer. Therefore, the observer can visually recognize one image formed by the entire uneven surface 90S.

As described above, according to the fourth embodiment of the display body, in addition to the effect (1) described above, the following effects can be obtained.
(5) Using one fourth surface element 106, a part of an image formed by light emitted toward the first fixed point and an image formed by light emitted toward the second fixed point A part can be formed.

  (6) It is possible to reduce the possibility that both the light emitted from the first plane part 110b and the light emitted from the second plane part 110c are simultaneously viewed by the observer. The visibility of the image formed by 110b and the image formed by the second planar portion 110c can be improved.

[Modification of Fourth Embodiment]
The concavo-convex surface 90 </ b> S is at least one region other than the first region 91 and the second region 92, and it is sufficient that the position on the concavo-convex surface 90 </ b> S overlaps the first region 91. And the part which the 1st area | region 91 and other area | regions overlap should just be the structure containing a 4th surface element as a surface element. According to such a configuration, the same effect as (5) described above can be obtained.

  Between the first surface element 102, the third surface element 104, the fourth surface element 106, the fifth surface element 108, and the sixth surface element 110, the inclination angle θ and the area of the plane portion provided in each surface element At least one may be different from each other. According to such a configuration, the brightness of the image can be made different between the images formed by the first region 91, the third region 73, and the fourth region 94, respectively.

  -At least one of inclination | tilt angle (theta) and an area may differ between the 1st plane part 106b with which the 4th surface element 106 is provided, and the 2nd plane part 106c. In addition, at least one of the inclination angle θ and the area may be different between the first plane part 110b and the second plane part 110c included in the sixth surface element 110. According to such a configuration, in each surface element, the brightness of the image can be made different between the image formed by the first plane portion and the image formed by the second plane portion.

  -You may implement in combination with the structure of 2nd Embodiment. That is, each surface element may have a shape based on a truncated cone surface and a composition plane portion. Even in such a configuration, the uneven surface 90S includes the third region 93, a part of the third region 93 overlaps the first region 91, and the surface element included in the third region 93 is the fourth surface element. If it is. Even with this configuration, it is possible to obtain the same effect as the above-described (5).

  -Of the plurality of regions included in the concavo-convex surface 90S, in the region excluding the second region 92, the shape of each region may be the same as the shape of all other regions. Even with this configuration, it is possible to obtain the same effect as the above-described (5).

  -One surface element may be provided with three or more plane parts from which the direction which faces is mutually different. In such a configuration, light can be emitted from one surface element toward three or more fixed points. That is, one surface element can emit light for forming three different images.

  10, 40, 60, 70, 90 ... display body, 10S, 22S, 42S, 60S, 70S, 90S ... uneven surface, 11, 61, 71, 91 ... first region, 11a, 31, 52, 82, 102 ... 1st surface element, 12, 62, 72, 92 ... 2nd area | region, 12a, 32, 54 ... 2nd surface element, 21, 41 ... base material, 22, 42 ... Uneven structure layer, 22a, 51, 81, 101 ... 1st convex part, 22b, 53 ... 2nd convex part, 23 ... Reflective layer, 31a, 52a, 54a, 82a, 84a, 86a, 88a, 102a, 104a, 106a, 108a, 110a ... Curved surface part, 31b, 52b , 82b, 84b, 86b, 88b, 102b, 104b, 108b ... plane part, 31c, 82c, 84c, 86c, 88c, 102c, 104c, 106d, 108c, 110d ... vertex, 42a ... first Part, 42b ... 2nd recessed part, 52c, 54b ... plane part for composition, 73, 93 ... 3rd area, 74, 94 ... 4th area, 75 ... 5th area, 83, 103 ... 3rd convex part, 84, 104 ... 3rd surface element, 85,105 ... 4th convex part, 86,106 ... 4th surface element, 87,107 ... 5th convex part, 88,108 ... 5th surface element, 91a, 93a, 94a, 110a1 ... 1st part, 91b, 93b, 94b, 110a2 ... 2nd part, 91c ... 3rd part, 106b, 110b ... 1st plane part, 106c, 110c ... 2nd plane part, 109 ... 6th convex part, 110 ... Sixth surface element, C: conical surface, L: square lattice, LP: lattice point, R: rotation axis, TC: truncated cone surface.

Claims (6)

It has an uneven surface that reflects the incident light as it enters,
The uneven surface includes a first region and a second region,
Each of the first region and the second region includes a plurality of surface elements,
The plurality of surface elements include a first surface element and a second surface element,
Each of the first surface elements includes a curved surface portion and a flat surface portion, and is configured such that the flat surface portion emits light toward a predetermined fixed point depending on the position of the flat surface portion in the first surface element,
Each of the second surface elements includes a curved surface portion, and the curved surface portion of the second surface element emits light toward the fixed point according to the position of the curved surface portion of the second surface element. ,
The surface element included in the first region is the first surface element;
The display element included in the second region is the second surface element. The first surface element further includes a combining plane portion,
The first plane element is configured such that the synthesis plane portion emits light toward a synthesis fixed point different from the fixed point depending on the position of the synthesis plane portion in the first surface element,
The second surface element further includes a combining plane portion,
The second surface element is configured such that the combining plane portion of the second surface element emits light toward the combining fixed point according to the position of the combining plane portion in the second surface element. The display body according to claim 1. The synthesis plane portion of the first surface element and the synthesis plane portion of the second surface element emit scattered light toward the synthesis fixed point depending on the surface roughness of each synthesis plane portion. It is comprised as follows. The display body of Claim 2. The fixed point is a first fixed point;
The uneven surface further includes a third region having a position on the uneven surface different from the first region and the second region and including the plurality of surface elements,
The plurality of surface elements further include a third surface element;
Each of the third surface elements includes a curved surface portion and a flat surface portion,
The third surface element is configured such that the planar portion of the third surface element emits light toward a second fixed point different from the first fixed point depending on a position of the planar portion in the third surface element. And
The surface element included in the third region is the third surface element,
Each said 2nd surface element is comprised so that the said curved surface part of the said 2nd surface element inject | emits light toward the said 2nd fixed point by the position of the said curved surface part in the said 2nd surface element. The display body as described in any one of 1-3. The fixed point is a first fixed point;
The concavo-convex surface is a third region having a position on the concavo-convex surface different from that of the second region and including the plurality of surface elements, wherein a part of the third region is a part of the first region. Further comprising the overlapping third region,
The plurality of surface elements further include a third surface element and a fourth surface element,
Each of the third surface elements includes a curved surface portion and a flat surface portion,
The third surface element is configured such that the planar portion of the third surface element emits light toward a second fixed point different from the first fixed point depending on a position of the planar portion in the third surface element. And
Of the plurality of first surface elements, the first surface element located in a portion overlapping the third region is a fourth surface element,
In the fourth surface element, the planar portion is a first planar portion,
The fourth surface element further includes a second planar portion,
The fourth surface element is configured to emit light toward the second fixed point according to a position of the second plane portion in the fourth surface element,
Of the third region, the surface element included in a portion that does not overlap the first region is the third surface element,
Each of the second surface elements is configured such that the curved surface portion of the second surface element emits light toward the second fixed point according to the position of the curved surface portion of the second surface element in the second surface element. It is comprised, The display body as described in any one of Claim 1 to 3. The display body according to claim 5, wherein in the fourth surface element, the curved surface portion is located between the first flat surface portion and the second flat surface portion.