JP7012954B2 - Image display device and image display method - Google Patents

Description

The present invention relates to an image display device and an image display method.

An image display device is known which comprises a light source for irradiating a hologram recording medium with reproduced light and reproduces an image pattern pre-recorded on the hologram recording medium.

The hologram diffracts the reproduced light incident from a predetermined angle by the interference fringes formed on the hologram recording medium, and reproduces the light intensity and the phase corresponding to the predetermined image pattern pre-recorded on the hologram recording medium. The observer visually recognizes a predetermined image pattern recorded in advance as a virtual image by the light diffracted from the hologram recording medium.

For example, Patent Document 1 is characterized by comprising a support having a predetermined shape to which a reflective hologram on which a predetermined image is recorded is attached, and a light source for projecting reproduced light onto the reflective hologram. A display device using a hologram is disclosed.

Patent Document 2 discloses a lighting device and an image recording medium that improve the effect of effect by moving one light source from different positions or sequentially illuminating a plurality of light sources with respect to the hologram recording medium.

However, image display devices that display image patterns by moving the position of the light source that illuminates the hologram recording medium have become common, and further ingenuity is required to give the observer a special effect. ..

Therefore, there is a need for an image display device that improves the effect of hologram production with a simple configuration.

Japanese Unexamined Patent Publication No. 10-063210 JP-A-2015-0433117

An object of the present invention is to provide an image display device that improves the effect of producing a hologram with a simple configuration.

The image display device according to the present invention reproduces a hologram recording medium in which a plurality of holograms are recorded in an image area and an image pattern recorded in an arbitrary hologram among a plurality of holograms recorded in the hologram recording medium. It is characterized by including a light source for irradiating light, a hologram changing unit that holds a hologram recording medium so that the positional relationship with the light source can be changed, and a holding unit that holds the hologram changing unit and the light source.

According to the present invention, the effect of producing a hologram is improved with a simple configuration.

It is a perspective view which shows the embodiment of the image display apparatus which concerns on this invention. It is an exploded perspective view which looked at the said image display device from the front side and the left side surface side. It is an exploded perspective view which looked at the said image display device from the back side. It is a vertical sectional perspective view of the said image display device. It is (a) top view which shows the hologram plate, the said holding part, the said light source, the said arm in the said embodiment, and (b) the top view which shows how the said arm swings. It is a vertical sectional right side view of the said image display device. It is (a) front view and (b) side view which shows the hologram plate provided in the image display apparatus, and the hologram change part which holds the hologram plate. It is (a) front view and (b) side view which shows the light source and the arm provided with the hologram plate, the holding part, and the image display device.

Hereinafter, embodiments of the image display device and the image display method according to the present invention will be described with reference to the drawings.

● Image display device ●
As shown in FIGS. 1 to 4, the image display device 1 includes a housing 10, a display unit 2, a switch 3, a holding unit 4, a support 51, a light source unit 6, and a hologram position detecting unit 52. And an arm detection unit 7.

● Housing 10
As shown in FIG. 2, the housing 10 is a member that integrally holds the internal structure of the image display device 1, and is a hollow rectangular parallelepiped having an opening 11 behind the upper surface. The outer edges of the openings 11 have opposite sides parallel to each other. Of the outer edges of the opening 11, the sides facing each other in the front-rear direction are straight, and the sides facing each other in the left-right direction are substantially quarter circles in the left-right side view. The outer edge shape of the opening 11 corresponds to the end shape of the display unit 2, which will be described later.

The housing 10 has a flat plate 12 parallel to the bottom surface in front of the upper surface, and the flat plate 12 overlaps with the flat plate 222 (see FIG. 2) of the display unit 2 described later. A through hole 13 is formed in the substantially center of the flat plate 12. The through hole 13 corresponds to the outer shape of the switch 3 and is substantially rectangular in the present embodiment.

● Display 2
As shown in FIGS. 2 to 3, the display unit 2 includes a transparent plate 21, a hologram cover 22, and a hologram plate 23. The hologram plate 23 is an example of a hologram recording medium.

The transparent plate 21 is a thin plate attached to the upper part of the housing 10. The transparent plate 21 has a shape in which a substantially quarter-circular partial cylindrical plate 221 and a continuous flat plate 222 are combined with the partial cylindrical plate 221. The partial cylindrical plate 221 is transparent, and the hologram plate 23 arranged inside the housing 10 can be visually recognized through the partial cylindrical plate 221.

The flat plate 222 of the transparent plate 21 is parallel to the bottom surface of the housing 10 in the state where the transparent plate 21 is installed on the housing 10. There is a through hole 24 in the substantially center of the flat plate 222. The through hole 24 corresponds to the outer shape of the switch 3 and is substantially rectangular in the present embodiment. The front end of the flat plate 222 has an appropriate engaging portion, and this engaging portion is engaged with the front surface of the housing 10 to fix the transparent plate 21 to the housing 10.

The transparent plate 21 may be entirely transparent, or only the partially cylindrical plate 221 may be transparent, and the flat plate 222 may be opaque or translucent.

The hologram cover 22 is a hollow member having a trapezoidal side surface and a vertical trapezoidal pillar so that the long side of the trapezoid is on the bottom. The bottom surface of the hologram cover 22 is open in the installed state, and the hologram cover 22 is placed on the hologram plate 23 from the bottom surface side. The bottom end of the hologram cover 22 is fixed to the holding portion 4 with an appropriate configuration. A hole 220 for visually recognizing the hologram plate 23 from the outside of the hologram cover 22 is formed in the substantially center of the front surface of the hologram cover 22. The hole 220 has a shape in which the upper and lower portions of a substantially circular shape are linearly cut in the horizontal direction.

The hologram plate 23 is a substantially disk that records and reproduces a hologram by utilizing the principle of interference diffraction of light. In the hologram plate 23, the upper and lower ends of the hologram plate 23 are recessed toward the back side when viewed from the front side, and a step is formed. The shape of the central portion of the hologram plate 23 in a plan view corresponds to the shape of the hole 220 of the hologram cover 22. A hologram is recorded and interference fringes are formed on the front surface in the central portion of the hologram plate 23. The central portion of the hologram plate 23 is an image region in which an image pattern corresponding to an interference fringe can be reproduced by diffracting the reproduced light incident from a predetermined angle.

The hologram recorded on the hologram plate 23 is a Lipman hologram in the present embodiment. In the case of the Lipman hologram, unlike the embossed hologram, the image is reproduced only when it is irradiated from a limited direction, and when it is irradiated from another direction, the image cannot be seen at all and can be made transparent. Further, in the present embodiment, the hologram recorded on the hologram plate 23 can be reproduced by a white light source, for example, a white LED.

The hologram plate 23 has a plurality of holograms recorded in the same image area. A plurality of holograms are multiple-recorded by an angle multiplexing method so as to be reproduced by reproduced light having different incident angles. Different image patterns are recorded in each of the plurality of holograms.

The image pattern reproduced from the plurality of holograms may be a monochrome image or a color image, respectively. Further, the form of the hologram may be a planar image or a stereoscopic image, respectively.

The plurality of holograms recorded in the same image area of the hologram plate 23 are moving images in the present embodiment, but may be still image patterns. When only the still image pattern is recorded on the hologram plate, the swing mechanism of the arm 62, which will be described later, is unnecessary.

The number of holograms recorded in the same image area of the hologram plate 23 is arbitrary, but is, for example, two. In the case of two holograms, the hologram is reproduced by the regenerated light incident from the first position and the regenerated light incident from the second position rotated 180 degrees about the normal line of the hologram plate 23 with respect to the first position. Is formed in.

When the number of holograms recorded in the same image area of the hologram plate 23 is four, the normal line of the hologram plate 23 with respect to the first position in addition to the first position and the second position. It is preferable that the image is formed so as to be reproduced by the reproduced light incident from the third position rotated 90 degrees and the fourth position rotated 270 degrees. That is, it is preferable that the plurality of holograms are formed so as to be reproduced by the reproduced light incident on the normal lines of the hologram plate 23 at equal angles.

The hologram plate 23 is connected to and held by the support 51 at the center on the back surface side.

As shown in FIGS. 7 (a) and 7 (b), the support 51 has a shape in which a member having a plate-like side surface is bent into a Z shape. One end side of the support 51 is vertically fixed to the outer wall of the holding portion 4 by an appropriate configuration. The other end side of the support 51 is substantially parallel to the plane of the hologram plate 23.

On the other end side of the support 51, a rotation drive unit as a hologram changing unit, that is, a motor, for example, a stepping motor 53 is attached. The center of rotation of the hologram plate 23 is coupled to the output shaft of the stepping motor 53. The stepping motor 53 controls the rotation position by the number of drive pulses, and rotates the hologram plate 23 in the circumferential direction with a predetermined angle as a unit. The stepping motor 53 holds the hologram plate 23 slightly tilted rearward with respect to the bottom surface of the image display device 1. As shown in FIG. 6, the hologram plate 23 is held by the support 51 so that the angle of the normal line with respect to the horizontal is, for example, about 20 degrees. In other words, the hologram changing portion and the support 51 hold the positional relationship between the hologram plate 23 and the light source 6 so as to be changeable. The positional relationship is specifically an incident angle at which the reproduced light from the light source 6 is incident on the hologram plate 23.

The support 51 is rotatably held in the circumferential direction with a normal line passing through the hologram plate 23 as a rotation axis by an appropriate link mechanism. In the present embodiment, this axis of rotation passes through the substantially center of the image region formed in the substantially center of the hologram plate 23 in a plan view. As described above, since the hologram plate 23 reproduces different holograms by the reproduced light having different incident angles, when the hologram plate 23 is rotated, the hologram plate 23 is reproduced based on the angle with respect to the reproduced light from the light source 6. The hologram to be played is switched.

The hologram changing unit may repeatedly rotate and stop the hologram plate 23 at regular intervals, or may be configured to rotate the hologram plate 23 based on the pressing of the switch 3 or an appropriate external input signal.

The hologram changing unit may manually and rotatably hold the hologram plate 23. At this time, for example, it may have a mechanism that gives a click feeling at each predetermined position based on the position where the hologram is reproduced by a cam or the like and promotes the stop of rotation at the predetermined position. .. Further, the hologram plate 23 may be freely rotated according to the manually applied power. For example, it has a mechanism to freely rotate the hologram plate 23 like a roulette wheel and stop the hologram plate 23 at a predetermined position based on the position where the hologram is reproduced when the rotation of the hologram plate 23 slows down. May be. The rotation direction of the hologram plate 23 is arbitrary.

The hologram changing unit is not limited to the stepping motor, and may be a normal motor. In that case, the hologram position detection unit 52 may detect the stop position of the hologram plate 23 to determine whether or not the hologram plate 23 is in a position where the hologram can be reproduced.

In other words, the hologram changing unit may have a mechanism that stops the rotation at each predetermined position, or it may rotate freely at the beginning and then finally stop at the predetermined position. It may be configured as follows. Further, the hologram plate 23 may always be rotated in only one direction, or may be rotated in the opposite direction or swung to be finally stopped at a predetermined position. The hologram plate 23 behaves in a manner that is difficult for the observer to predict, so that the effect of the effect can be further enhanced.

Up to this point, the hologram plate 23 having one image region has been described as an example of the hologram recording medium, but the hologram recording medium may have a plurality of image regions. Further, the hologram recording medium may be a columnar or polygonal column instead of a flat plate.

● Switch 3
The switch 3 is a push button type interface that penetrates the through hole 13 and the through hole 24, and can be pressed from the outside of the image display device 1. When the switch 3 is pressed from the outside, the operation is transmitted to the internal mechanism through the switch 3, and the image display device 1 performs various operations.

The image display device 1 may be configured so that the light source 61 included in the light source unit 6 is turned on in response to the pressing of the switch 3. Further, the hologram plate 23 may be configured to rotate by operating the motor in response to the pressing of the switch 3.

● Holding part 4
As shown in FIGS. 2 to 4, the holding unit 4 is a member that holds the support 51, the light source unit 6, and the arm detection unit 7. The holding portion 4 has a substantially square cylinder shape, that is, has a square hole 41 penetrating the upper surface and the bottom surface. The side wall of the holding portion 4 on the rear side in the installed state is formed with a substantially quadrangular opening 42 that communicates the outside with the square hole 41. The upper end portion of the holding portion 4 on the rear side in the installed state is provided with a flat surface portion 43 formed so that one side of the square cylinder extends outward in the radial direction. A support 51 is fixed to the outer wall on the flat surface portion 43 side via an appropriate member. Further, a control board 44 having a side having a length corresponding to the width of the holding portion 4 is fixed to the bottom surface on the wall side facing the support 51.

● Light source unit 6
The light source unit 6 includes a light source 61 and an arm 62.

The light source 61 is a light source that emits renewable light that can reproduce the hologram recorded on the hologram plate 23. The light source 61 is, for example, a white LED.

The light source 61 is not limited to the white LED, and may be, for example, an LD.

The arm 62 is a rod-shaped member that holds the light source 61 on one end side. One end side of the arm 62 is inserted into the opening 42 of the holding portion 4 from the outside to the inside of the holding portion 4. That is, the light source 61 is arranged inside the square hole 41 of the holding portion 4. The arm 62 holds the light source 61 so that the reproduced light emitted from the light source 61 is incident on the fixed position of the hologram plate 23 at a predetermined angle. In other words, the arm 62 holds the light source 61 so that the angle formed by the center of the image region of the hologram plate 23 and the light source does not change in the cross section including the rotation axis of the hologram plate 23 and the light source 61. The fixed position of the hologram plate 23 is substantially the center of the image area of the hologram plate 23. The other end of the arm 62 is swingably connected to the support 51 in a horizontal plane.

The arm 62 is connected to an arm drive unit that electrically swings the arm 62.

As shown in FIGS. 5A and 5B, the arm 62 can swing left and right so as to draw an arc around the starting point from the connecting portion with the support 51. As the arm 62 swings, the irradiation angle of the reproduced light emitted from the light source 61 with respect to the image region continuously changes. The observer observing the image display device 1 from a fixed position due to the swing of the arm 62 visually recognizes the reproduced hologram as a moving image.

As shown in FIG. 6, the hologram plate 23 is arranged so that the angle of the normal line with respect to the horizontal is about 20 degrees. This angle is appropriately determined according to the positional relationship between the observer and the image display device 1. Further, the light source 61 is arranged so that the reproduced light from the light source 61 is incident on the hologram plate 23 at about 40 degrees.

● Hologram position detection unit 52
The hologram position detection unit 52 is a sensor that detects the rotational position of the hologram plate 23 in the circumferential direction. The hologram position detection unit 52 reads a flag appropriately arranged on the back surface of the hologram plate 23 to detect the rotation angle of the hologram plate 23.

As shown in FIGS. 7A and 7B, a plurality of flags readable by the hologram position detection unit 52 are arranged on the outer peripheral portion on the back surface side of the hologram plate 23. On the hologram plate 23, the same number of flags as the number of holograms are arranged. The flag is provided so that the flag is positioned at a fixed position when the hologram plate 23 is rotated so as to be at each position where the hologram is reproduced.

In the case of the present embodiment, when the hologram plate 23 is at each position, a flag is provided in a lower part thereof. That is, when the hologram plate 23 rotates, the position on the hologram plate 23 read by the hologram position detection unit 52 changes. When the hologram plate 23 reaches each position where the hologram is reproduced, each flag is arranged in the reading range of the hologram position detection unit 52, and the hologram position detection unit 52 correctly rotates the hologram plate 23 to a position where the hologram can be reproduced. Detect that it has been done.

● Arm detector 7
As shown in FIGS. 8A and 8B, the arm 62 and the control board 44 are provided with an arm detection unit 71 and an arm position reading unit 72, respectively. The arm detection unit 71 and the arm position reading unit 72 constitute the arm detection unit 7. The arm detected portion 71 is a protrusion formed at one end of the arm and protruding downward from the lower surface of the one end toward the control substrate 44. The arm position reading unit 72 is a U-shaped member arranged substantially in the center of the upper surface of the control board 44. The arm position reading unit 72 can detect whether or not the arm detected unit 71 is within the U-shaped opening. When the arm 62 is in the center of the hologram plate 23, the arm detected portion 71 and the arm position reading portion 72 are fitted, and it is detected that the arm 62 is in the center.

The image display device 1 may be configured by a plurality of small light sources in which the light source 61 is arranged at a position corresponding to the swing locus, instead of the configuration in which one light source 61 is swung by the arm 62. In this case, the light source 61 includes an electric circuit that sequentially turns on a plurality of small light sources. The reproduced light from the plurality of small light sources is incident on the center of the image region of the hologram plate 23 at different angles of incidence. The plurality of holograms are configured to be reproduced corresponding to the reproduced light from the plurality of small light sources. When the hologram plate 23 is sequentially irradiated with the reproduced light emitted from each of the plurality of small light sources, the image patterns of the plurality of holograms are sequentially reproduced.

● Image display method ●
The method in which the above-mentioned image display device 1 displays an image will be described.

First, the light source 61 irradiates the hologram plate 23 with the regenerated light (first step). Next, the support 51 changes the positional relationship between the light source 61 and the hologram plate 23 (second step). Then, the image pattern recorded on any of the plurality of holograms is reproduced according to the positional relationship between the light source 61 and the hologram plate 23 (third step).

In the second step, the support 51 changes the positional relationship between the light source 61 and the hologram plate 23 by rotating the hologram plate 23 with the normal line passing through the hologram plate 23 as the axis of rotation. In the present embodiment, this axis of rotation passes through the substantially center of the image region formed in the substantially center of the hologram plate 23 in a plan view. While the hologram plate 23 is rotating, the reproduction of the moving image is stopped. When the hologram plate 23 stops at a predetermined position where the hologram is reproduced, a hologram different from that before rotation is reproduced.

Through the first to third steps, the arm 62 swings continuously. The swing of the arm 62 may be intermittent.

The image display device 1 repeats the second step and the third step as appropriate. According to this image display method, the observer can reproduce a moving image of the hologram, or the hologram plate 23 starts to rotate and the hologram disappears once, and then another hologram is reproduced after the hologram plate 23 is stopped. Can be observed. This image display method can give the observer a higher effect as compared with the image display in which only one hologram moving image is reproduced.

The image display device 1 may have a fourth step of stopping the light source 61 from irradiating the hologram plate 23 with the reproduced light. In the fourth step, the light source 61 may be turned off, or the regenerated light from the light source 61 may be blocked by an appropriate light-shielding member so as not to irradiate the hologram plate 23. According to the image display method in which the first to fourth steps are randomly repeated as appropriate, it is possible to give an even higher effect to the observer.

The image display device 1 may execute the first step in response to the pressing of the switch 3 by an observer or the like. Further, the image display device 1 may execute the second step in response to the pressing of the switch 3. In either case, in order to cause the observer or the like to press the switch 3, an instruction may be appropriately displayed somewhere in the image display device 1, or the instruction may be appropriately arranged near or integrally with the image display device 1. It may be transmitted to the observer or the like by the device of. By encouraging the observer or the like to move spontaneously, the observer can be made to pay attention to the image display device 1 and a higher effect can be given.

The technical idea of the present invention is not limited to the form in which the image display device operates independently, and can be applied to the form in which the image display device is incorporated in a part of an appropriate device.

1 Image display device 4 Holding unit 23 Hologram plate (hologram recording medium)
53 Hologram change part (stepping motor)
61 Light source

Claims (14)

A hologram recording medium in which multiple holograms reproduced by reproduced light at different angles are recorded in the same image area, and
A light source that irradiates a reproduction light for reproducing an image pattern recorded on an arbitrary hologram among the plurality of holograms recorded on the hologram recording medium.
A hologram changing unit that rotatably holds the hologram recording medium around the normal line passing through the image region as a rotation axis .
The hologram changing portion, the holding portion that holds the light source, and the
A mechanism unit that swings the light source with respect to the hologram recording medium while keeping the light source directed toward the center of the image area of the hologram recording medium.
Equipped with
Each of the plurality of holograms is a moving image pattern.
The light source reproduces any one of the plurality of holograms as a moving image pattern by displacing the irradiation angle with respect to a fixed position of the hologram recording medium due to the shaking caused by the mechanism unit .
An image display device that reproduces a hologram different from each of the moving image patterns when the hologram recording medium is rotated by the hologram changing unit with the normal as the axis of rotation . The regenerated light is applied to a fixed position of the hologram recording medium, and the hologram changing unit reproduces an image pattern in which the regenerated light is recorded in any one of the plurality of holograms. The image display device according to claim 1, wherein the position of the hologram recording medium can be changed. The plurality of holograms are multiplex-recorded in the same image area of the hologram recording medium by an angle multiplexing method reproduced by reproduced light at different angles, and are reproduced when the hologram recording medium is rotated. The image display device according to claim 1 or 2, wherein the hologram can be switched. The image display according to any one of claims 1 to 3 , wherein the hologram changing unit includes a rotation driving unit that moves the hologram recording medium to electrically change the positional relationship between the light source and the hologram recording medium. Device. The rotation drive unit rotates the hologram recording medium at one of a plurality of predetermined positions so that the image pattern recorded on the plurality of holograms is reproduced. The image display device according to claim 4 , which holds the hologram recording medium. The mechanical unit holds the light source, swings in an arc around the starting point, and continuously changes the irradiation angle of the regenerated light emitted from the light source with respect to the fixed position.
An arm drive unit that swings the arm,
5. The image display device according to claim 5 . A hologram recording medium in which multiple holograms reproduced by reproduced light at different angles are recorded in the same image area, and
A light source that irradiates a reproduction light for reproducing an image pattern recorded on an arbitrary hologram among the plurality of holograms recorded on the hologram recording medium .
A hologram changing unit that rotatably holds the hologram recording medium around the normal line passing through the image region as a rotation axis .
Equipped with
Each of the plurality of holograms is a moving image pattern.
The light source is composed of a plurality of small light sources that irradiate the hologram recording medium from different angles, and the plurality of small light sources sequentially irradiate the hologram recording medium with emitted regenerated light, thereby causing the plurality of small light sources. Play one of the holograms as a video pattern and
An image display device that reproduces a hologram different from each of the moving image patterns when the hologram recording medium is rotated by the hologram changing unit with the normal as the axis of rotation . The plurality of holograms are reproduced in response to the reproduced light from the plurality of small light sources, and when the reproduced light emitted from each of the plurality of small light sources is sequentially applied to the hologram recording medium, the plurality of holograms of the plurality of holograms are reproduced. The image display device according to claim 7 , wherein the image patterns are sequentially reproduced. The hologram changing unit rotates the hologram recording medium in response to manually applied power. Hold rollable,
The image display device according to any one of claims 1 to 8. The hologram changing unit is described in the case where the hologram recording medium is manually rotated. The hologram recording medium at a predetermined position based on the position where the program is reproduced. Stop the body,
The image display device according to claim 9. A hologram recording medium in which multiple holograms reproduced by reproduced light at different angles are recorded in the same image area, and
A light source that irradiates a reproduction light for reproducing an image pattern recorded on an arbitrary hologram among the plurality of holograms recorded on the hologram recording medium.
A hologram changing unit that rotatably holds the hologram recording medium around the normal line passing through the image region as a rotation axis .
The hologram changing portion, the holding portion that holds the light source, and the
A mechanism unit that swings the light source with respect to the hologram recording medium while keeping the light source directed toward the center of the image area of the hologram recording medium.
It is an image display method of an image display device provided with
Each of the plurality of holograms is a moving image pattern.
The first step in which the light source irradiates the hologram recording medium with the regenerated light,
The second step in which the hologram changing unit rotates the hologram recording medium with the normal line passing through the image region as the axis of rotation.
A third step of reproducing any of the plurality of holograms according to the positional relationship between the light source and the hologram recording medium by swinging the light source while keeping it toward the center of the image region of the hologram recording medium. When,
Equipped with
The light source reproduces any one of the plurality of holograms as a moving image pattern by displacing the irradiation angle with respect to a fixed position of the hologram recording medium due to the shaking caused by the mechanism unit .
When the hologram recording medium is rotated about the normal as the axis of rotation by the second step, holograms different from those of the moving image pattern are reproduced.
Image display method. A hologram recording medium in which multiple holograms reproduced by reproduced light at different angles are recorded in the same image area, and
A light source that irradiates a reproduction light for reproducing an image pattern recorded on an arbitrary hologram among the plurality of holograms recorded on the hologram recording medium .
A hologram changing unit that rotatably holds the hologram recording medium around the normal line passing through the image region as a rotation axis .
The hologram changing portion, the holding portion that holds the light source, and the
It is an image display method of an image display device provided with
The first step in which the light source irradiates the hologram recording medium with the reproduced light,
The second step in which the hologram changing unit rotates the hologram recording medium with the normal line passing through the image region as the axis of rotation .
A third step of reproducing one of the plurality of holograms according to the positional relationship between the light source and the hologram recording medium by sequentially turning on the small light sources constituting the light source .
Equipped with
The light source reproduces any one of the plurality of holograms as a moving image pattern by shifting the irradiation angle with respect to a fixed position of the hologram recording medium by sequentially turning on the small light sources .
When the hologram recording medium is rotated about the normal as the axis of rotation by the second step, holograms different from those of the moving image pattern are reproduced.
Image display method. The image display method according to claim 11 or 12 , further comprising a fourth step of stopping the light source from irradiating the hologram recording medium with the reproduced light. When the hologram recording medium is manually rotated, the hologram recording medium is roughened. Further provided with a fifth step of stopping at a damp position,
The image display method according to any one of claims 11 to 13.

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