JP2000039672A - Hologram display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable an excellent video to be displayed and to obtain a high eye-catch effect by constituting a hologram display device of a hologram screen and a video projecting machine projecting video light toward the hologram screen and specifying a distance between the lower end of the hologram screen and a floor surface. SOLUTION: The hologram display device 1 is constituted of the hologram screen 11 and the video projecting machine 12 projecting the video light 125 toward the screen 11. Then, the distance A between the lower end 111 of the screen 11 and the floor surface 31 is set to be 80 to 180 cm. Besides, the center height C of the screen 11 from the floor surface 31 is set to be 110 to 210 cm. The machine 12 is fixed to the horizontal ceiling surface 32 of a show room by a fixing jig 129. It is preferable that the projecting angle of the video light 125 projected toward the screen 11 is set to be 20-50 deg.. The screen 11 is the transmission type screen and stuck to a window glass by stretch.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hologram display device that can be installed in a showroom or the like for displaying still images and moving images.

[0002]

2. Description of the Related Art In recent years, a new display device using a plasma display, a thin liquid crystal display, a projection television, or the like has been proposed as a means for presenting an image composed of a still image, a moving image, and the like to passersby in a showroom or the like. However, when these devices are enlarged in order to enhance the advertising effect, there is a possibility that the device may have a form that gives a sense of oppression to the viewer. Therefore, the installation location of such a display device is limited, and there is a difficulty in usability. The degree of freedom in design was not so high.

[0003] As a display device that can solve the above problems and achieve a higher advertising effect, a device using a hologram screen can be considered. The hologram screen is a screen formed by attaching a thin-film hologram element to a transparent substrate or the like as described later. The hologram element has interference fringes. When image light is projected on the interference fringes, a real image of the image light is formed here and further diffracted. As described above, the image light is reproduced on the hologram element and can be viewed as an image.

The hologram element has transparency, and the hologram screen itself has a so-called power source,
There is no need to provide a driving device or the like. Therefore, the installation area of the hologram screen can be easily reduced. This also gives a high degree of freedom in design.

[0005]

However, the hologram screen has a viewing angle as described later, and there is a problem that an image cannot be seen unless the hologram screen is observed from within the range of the viewing angle. For this reason,
If the hologram screen is not properly laid out, it may be difficult to observe an image.

Various attempts have been made to solve this problem. For example, in the mirror method, in manufacturing a hologram element, a light diffuser is surrounded by a mirror, object light is projected from a plurality of directions onto a photosensitive member, and complex interference fringes formed by the object light and the reference light are exposed. Record on the member.

However, the viewing angle is limited even in a hologram screen formed by a hologram element by the mirror method. That is, even in the hologram element by the mirror method, there is a portion where the light diffuser is not recorded, and a phenomenon that an image cannot be observed or not depending on the position of the observer occurs. In addition, depending on the position of the observer, only a low-luminance image can be observed, and the color of the image changes, so that only low-quality images can be observed. Thus, it was very difficult to sufficiently widen the viewing angle of the hologram screen.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a hologram display device capable of displaying an excellent image and having a high eye catching effect.

[0009]

According to a first aspect of the present invention, there is provided a hologram screen, and an image projector for projecting image light onto the hologram screen, and a lower end of the hologram screen is at a distance of 80 to 180 cm from a floor surface. In the hologram display device.

The hologram screen will be described. Examples of the hologram screen include a transmission hologram screen that transmits image light and a reflection hologram screen that reflects image light. In the present invention, any screen can be used. 18 to 20 to be described later.
Various forms can be used, as shown in Furthermore, it is possible to display an image by projecting image light onto the entire surface of the hologram screen. However, as shown in FIG. 21 described later, a part of the hologram screen is projected by using a zoom function of the image projector. It can also be used by projecting image light and displaying an image.

The transmission type hologram screen is a screen used by arranging a video projector on the back side of the screen. The image light projected from the image projector forms an image and a real image on a hologram screen. A human can recognize an image by the diffracted light scattered and transmitted from the real image.

On the other hand, a reflection type hologram screen is a screen used by arranging an image projector on the surface side of the screen. The image light projected from the image projector forms an image and a real image on a hologram screen.
The human can recognize the image by the diffracted light scattered and reflected from the real image.

In the method of manufacturing the hologram screen, diffused light passing through a light diffuser such as frosted glass is used as object light and non-diffused light as reference light. Is formed. Hereinafter, an example of production will be described.

When manufacturing a transmission type hologram screen, as shown in FIG. 15, after changing the optical path of the coherent light 34 emitted from the laser light source 51 by the mirror 511, the two light 341
342. Then, one light 341 is transmitted to the lens 5.
After diverging at 16, the light is transmitted through the light diffuser 52, and the obtained diffused light is projected on the photosensitive member 50 as object light 36.
The other light 342 split by the half mirror 512
Are changed by the mirrors 513 and 514,
The light is diverged at 15 and is projected on the photosensitive member 50 as reference light 35. Then, interference fringes are formed on the photosensitive member 50 by the reference light 35 and the object light 36. In the figure, the pulsating wave type display schematically shows diffused light.

On the other hand, when manufacturing a reflection type hologram screen, as shown in FIG. 16, the reference light 35 and the object light 36 are projected from opposite sides of the photosensitive member 50 to form interference fringes. A hologram screen can be formed by, for example, attaching a PET film to both surfaces of the photosensitive member 50 obtained by the above process and forming a protective film.

Next, as the video projector, a slide projector, an OHP (over head projector),
Various devices that can project video light such as still images and moving images such as projectors and projectors can be used. Further, an image can be supplied to the image projector from the outside. In this case, examples of the supply device include various playback devices such as a video tape, an optical disk, and a personal computer. Of course, the video projector can also incorporate a playback device or the like. Further, it can be supplied from outside using a telephone line, a line for satellite broadcasting, or the like.

If the height of the hologram screen is less than 80 cm, the line of sight of the observer greatly deviates from the viewing angle peculiar to the hologram element, and it is difficult for the observer to observe an excellent image. Could be. Also, even when the distance exceeds 180 cm, the image may be difficult to see for the same reason. In this case, an excellent image refers to an image in which the color difference between the image light projected from the image projector and the brightness, contrast, brightness, and the like are substantially the same.

Further, the hologram display device according to the present invention can be installed both indoors and outdoors. When installed outdoors, the floor indicates the ground.

As shown in FIG. 22, which will be described later, the floor is the floor 311 where the observer 8 who observes the hologram display apparatus stands. Also,
As shown in FIGS. 18 to 20 described later, the hologram screen can take various shapes. FIG. 3 shows the lower end of the hologram screen. The hologram screen can be formed in a flat shape, but can also be formed in a curved state with a curvature.

Although the hologram screen can be assumed to have a very thin shape, the portion of the hologram display device according to the present invention which does not display an image which can be observed is the role of the hologram screen in the hologram display device of the present invention. Therefore, this elongated portion cannot be defined as the lower end. In determining the lower end of the hologram screen, it is necessary to consider the above circumstances (see FIG. 20 described later).

The hologram screen according to the present invention uses interference fringes, so that the color, brightness, and the like of the displayed image differ depending on the viewing angle. That is, the hologram screen has a position where the image is easy to see and a position where the image is hard to see. A position at which a particularly excellent image is clearly seen is called a viewing angle.

A specific description of the viewing angle will be described with reference to FIGS. The hologram screen has a feature that an image can be viewed only in a conical space formed by diffracting and diffusing image light from an image projector onto the hologram screen. Therefore, the image light can be seen only in a region where the individual conical spaces formed by irradiating the respective parts of the hologram screen are overlapped. This area is the viewing angle.

In FIG. 1, the image light 125 projected from the image projector 12 reaches the hologram screen 11 while spreading in a fan shape. The image light 125 hitting the upper end 112 of the hologram screen 11 is scattered and transmitted here and spreads in a fan shape. The image light 125 hitting the lower end 111 of the hologram screen 11 also spreads in a fan shape.

In FIG. 2, the image light 125 hitting the left end 113 of the hologram screen 11 and the right end 11
Each of the image lights 125 hitting No. 4 spreads in a fan shape.
Note that, since these descriptions have been made with reference to FIGS. 1 and 2 in the form of a plane, the state in which the image light 125 is diffused is expressed as a fan shape.

It is known that an image displayed on the hologram screen becomes difficult to see when the luminance of the image is less than half the central luminance. Here, the center luminance is the luminance of an image at the center of the hologram screen. Therefore, the viewing angle 89 of the hologram screen 11 is a fan-shaped area shown in FIGS.

Next, the function and effect of the present invention will be described. In the hologram display device according to the present invention, the hologram screen is installed under the conditions described above. Thus, the viewing angle of the hologram screen is exactly within the range of the observer's line of sight. As described above, this viewing angle is a region where an excellent image can be observed, and thus the hologram display device of the present invention can display an excellent image.

In this respect, the hologram display device according to the present invention can display an image having a high appeal effect to an observer in this respect, and can easily make the hologram screen itself transparent. Because it can be configured, it is possible to make the observer feel as if the image is being projected in an empty space. Therefore, the hologram display device according to the present invention is excellent in the effect of attracting attention, that is, the eye catching effect.

As described above, according to the present invention, it is possible to provide a hologram display device capable of displaying an excellent image and having a high eye catching effect.

Incidentally, the photosensitive member used for producing the hologram element is generally made of a photopolymer material. In the photopolymer material, a portion irradiated with the laser beam is crosslinked, and an interference fringe is formed there. In order to display an excellent image on the hologram screen, it is preferable that the interference fringes be in a state immediately after manufacturing (initial state).

However, the interference fringes may be deteriorated by heat. For example, a hologram screen is formed by attaching a hologram element to a transparent substrate such as a window glass.
There is a difference in thermal expansion between the hologram element and the transparent substrate. Therefore, when the hologram element and the transparent substrate are heated, a thermal stress acts between them. This thermal stress may cause distortion of the photopolymer constituting the hologram element. If the interference fringes are distorted,
The diffraction state of the image light is also distorted. As a result, the image reproduced on the hologram screen may be distorted.

The heat sources that cause such a problem include heat of the image light itself, hot air from a cooling fan or the like installed in the image projector, direct sunlight in a high temperature season such as summer, and ground heat. Heat due to reflection and the like can be given.

In the hologram display device according to the present invention, the hologram screen is installed under the above conditions. As a result, the hologram screen is installed at a certain distance from the floor surface, and it is possible to obtain a spatial clearance with respect to the floor surface.
For this reason, it is possible to prevent heat from accumulating around the hologram screen and heating the hologram screen.

The height of the hologram screen is 80c.
If it is less than m, there is a possibility of being exposed to the heat of reflection from the floor. In addition, since it is close to the floor surface, heat radiation may be deteriorated, and heat may be easily trapped. On the other hand, 180
When the distance exceeds cm, the installation position of the hologram screen is increased, and the image may be difficult to see.

In particular, in the case of a hologram screen used by being adhered to glass, the coefficient of thermal expansion (3 to 10 × 10 10) of the glass is used in order to more effectively reduce the influence of heat.
⁻⁶ cm / cm / ° C.)
It is preferable to sandwich the hologram screen with an ET film or the like.

In the hologram display device according to the present invention, the video projector can be installed either above or below the hologram screen (see Embodiments 1 and 2). In addition, it can be arranged obliquely upward and downward.

When the image projector is arranged on the lower side and the image light is projected from below, it is preferable that the position of the hologram screen is arranged as high as possible. Also,
When the image projector is arranged on the upper side and the image light is projected from above, it is preferable that the position of the hologram screen is arranged as low as possible. As a result, the zero-order light from the image projector (the image light itself projected from the image projector)
Can be prevented from entering the eyes of the observer.

Next, the invention of claim 2 comprises a hologram screen and an image projector for projecting image light to the hologram screen, and the center height of the hologram screen is 110 to 210 cm from the floor surface. A hologram display device,

In the hologram display device according to the present invention, as described above, the viewing angle of the hologram screen is exactly within the range of the line of sight of the observer, and an excellent image can be displayed within the range of the line of sight of the observer. it can. Therefore, in this respect, the present invention can display an image having a high appealing effect to the observer. That is, it has a high eye catching effect.

As described above, according to the present invention, it is possible to provide a hologram display device capable of displaying an excellent image and having a high eye catching effect.

If the center height is less than 110 cm, the observer's line of sight tends to deviate from the viewing angle, the color tone of the image deteriorates, and the image may be difficult to see. On the other hand, when it exceeds 210 cm, the installation position of the hologram screen becomes high, and the image may be difficult to see. In addition, the floor surface serving as a reference in the center height according to this example is a floor surface 311 on which the observer 8 stands, as shown in FIG. 22 described later.

By installing the hologram screen under the above-mentioned conditions, it is possible to prevent heat from being trapped around the hologram screen. If the height of the center is less than 110 cm, it is exposed to the heat reflected from the floor,
There is a possibility that the heat radiation property is deteriorated and the heat is easily trapped.

Next, the invention of claim 3 comprises a hologram screen and a video projector for projecting video light to the hologram screen, and the projection angle of the video projector to the hologram screen is 20 to 50
The hologram display device is characterized in that:

In the hologram display device according to the present invention, by setting the projection angle within the above-mentioned range, the viewing angle of the hologram screen is exactly within the range of the line of sight of the observer, and is excellent within the range of the line of sight of the observer. Video can be displayed. Therefore, in this respect, the present invention can display an image having a high appealing effect to the observer. That is, it has a high eye catching effect.

As described above, according to the present invention, it is possible to provide a hologram display device capable of displaying an excellent image and having a high eye catching effect.

If the projection angle is less than 20 degrees, the 0th-order light from the image projector may enter the eyes of the observer, and the image may not be normally observed. On the other hand, when the projection angle exceeds 50 degrees, trapezoidal distortion of the image reflected on the hologram screen increases, and it may be difficult to observe a normal image.

As shown in FIG. 1 and the like, which will be described later, the image projector may be installed obliquely above or below the hologram screen, and may be projected obliquely above or below the hologram screen. . As shown in FIG. 10, the projection angle is α
Means that a cone having a vertex at the center of the hologram screen is assumed, and the image projector is installed on the circumference of a circle forming the bottom surface of the cone. That is, as shown in the figure, a position t1 above the hologram screen, a position t2 below the hologram screen, and a position t obliquely above the hologram screen.
3. If a video projector is installed at a position t4 that is obliquely below the hologram screen, the projection angles of all the video projectors are equal to α.

Next, it is preferable that the hologram display device is provided with a trapezoidal distortion correcting mechanism. As a result, a correct image without trapezoidal distortion can be projected on the hologram screen, and a hologram display device that allows the observer to observe the correct image can be obtained. As the trapezoidal distortion correction mechanism, a trapezoidal distortion correction circuit that can electrically correct an image, a correction device that optically corrects using a lens, or the like can be used.

Next, the diagonal length of the hologram screen is 30 inches or more.
The projection distance of the image light is preferably 90 cm or more. As a result, the image projector can be installed in a small space,
In addition, it is possible to secure an image of 30 inches or more that is sufficient for obtaining the eye catch effect. In addition, almost all projectors commercially available as video projectors can be used.

The diagonal length indicates the length of the diagonal line of the substantially rectangular hologram screen. If it is less than 30 inches, the eye catching effect may be insufficient. The upper limit of the diagonal length is not particularly limited as long as the distance from the floor surface can be secured as described in the above-described claims.

The projection distance is determined by the distance between the surface of the hologram screen and the image light projection unit (eg,
(A lens of a liquid crystal projector, etc.). If the projection distance of the image light is shorter than 90 cm, the diagonal length of the image may not be 30 inches or more. Further, there is a possibility that the image projector itself is reflected on the hologram screen and can be seen by an observer.

The upper limit of this distance is preferably set to 350 cm. If the upper limit is exceeded, the installation space will be large, and it may be difficult to suspend the video projector on a low ceiling, or it may be difficult to secure the space even when the projector is placed below. Furthermore, even if the image is narrowed down by the zoom function of the image projector or the like, the image may run off the hologram screen.

Next, the distance between the diagonal length of the hologram screen and the projection distance is y.
= Ax + b (where x is the diagonal length [inch], y is the projection distance [cm], and a and b are coefficients determined by the video projector). This gives
The size of the hologram screen can be matched with the performance of the image projector, and the space can be saved. For example, in the case of a video projector of TH-L392J (manufactured by Matsushita Electric Industrial Co., Ltd.), a = 4.6, b = −
23.7. Generally, a is 4 to 5 and b is -20.
It often takes a value of -30.

As shown in FIG. 6, which will be described later, when a plurality of hologram screens are arranged and used as one large screen, the diagonal length in the shape of the entire large screen formed by the plurality of hologram screens is used. Is adopted as the diagonal length L of the hologram screen.

Next, the hologram screen has a contrast of 1.5 or more (where the contrast is (image white screen luminance + background luminance + external light luminance)).
/ (Determined by (image black screen luminance + background luminance + external light luminance)). As a result, it is possible to obtain an image appearance that can sufficiently secure the eye catch effect.

If the contrast is less than 1.5, the appearance of the image is poor, and the eye catch effect may be insufficient. The more preferable upper limit of the contrast is 300. If the value is higher than this value, the image may be too bright and difficult to see.

The video white screen brightness is the brightness of a normally white screen input from a personal computer, and the video black screen brightness is the brightness of a black screen input to a personal computer. The background luminance is the brightness of the object behind the hologram screen, and the external light luminance is the brightness of the object reflected on the hologram screen.

In order to realize the above environment, it is preferable to provide the hologram display device with a configuration as described below. For example, it is preferable to provide a sensor for detecting the brightness or the like around the hologram screen and to configure the image projector so that the image brightness and the image size can be adjusted in conjunction with the sensor. Also, for example, as shown in a seventh embodiment to be described later, it is preferable to provide a polarizing film or an anti-reflection film on the hologram screen to reduce the background luminance and the external light luminance and increase the contrast.

The hologram display device according to the present invention is preferably installed such that direct sunlight does not hit the hologram screen. As a result, the adverse effect of heat can be eliminated, and the contrast of the environment where the hologram screen is installed can be 1.5 or more as described above.

However, as a countermeasure, if an anti-reflection film, a polarizing film or the like is mounted on the hologram screen as shown in a seventh embodiment described later, a normal image can be observed even in a very bright place such as direct sunlight. It can be configured to be able to do so. Further, it is also possible to adopt a configuration in which sunlight is prevented, eaves, blinds, etc. are provided to prevent direct sunlight.

Next, as in the eighth aspect of the present invention, it is preferable that the hologram screen has a chamfered corner, or a cross section of the hologram screen is tapered. Thereby, the hologram screen can be installed without being easily peeled off. In particular, when a hologram screen is installed on a window glass or the like as shown in a first embodiment described later, it is possible to prevent the hologram screen from peeling off when cleaning the window.

Here, "the corner is chamfered" means that a so-called corner R is provided. For example, as shown in FIGS. Is to configure. Further, “providing a taper in the cross section” means, for example, FIG.
That is, the hologram screen is configured in a state as shown in (c) and (d).

Next, as in the ninth aspect of the present invention, it is preferable that the hologram screen is installed by applying water. As a result, since there is a time until the drying, the fine adjustment of the installation position of the hologram screen can be performed using the sliding of the water during that time.

The pressure-sensitive adhesive used for the water application is, for example, an acrylate copolymer, an styrene acrylate copolymer, polyvinyl alcohol, polyvinyl butyral, or the like, a water-soluble polymer, a water-soluble emulsion, or the like. Resin-based organic binders or the like can be used.

Next, according to the tenth aspect of the present invention, the image projector is fixed to the ceiling horizontal plane at an inclination angle of 20 degrees with a fixing jig.
It is preferable that the angle is fixed at 50 degrees. This prevents the 0th-order light of the image projector from entering the eyes of the observer, and allows the image to be normally observed. If the inclination angle is less than 20 degrees, the zero-order light may enter the eyes of the observer. If it exceeds 50 degrees, the image will be too distorted,
Or the focus may be out of focus.

The tilt angle of the video projector with respect to the ceiling horizontal plane will be described. Consider a straight line perpendicular to the hologram screen installation surface. When this straight line is parallel to the ceiling surface (see FIG. 1 described later), the ceiling surface becomes a ceiling horizontal plane. The angle formed by the ceiling horizontal plane and the video projector is the tilt angle.

On the other hand, when the straight line perpendicular to the installation surface of the hologram screen is not parallel to the surface of the ceiling (see FIG. 23 described later), the plane including the vertical straight line is the ceiling horizontal plane. The angle formed by the ceiling horizontal plane and the video projector is the tilt angle. In addition, when the hologram screen is a flat surface, the plane including the surface of the hologram screen can be regarded as the mounting surface.

The hologram display device according to the present invention may be provided with various sensors, and the operation of the video projector may be controlled by a signal from the sensors. This makes it possible to obtain a device that automatically starts when necessary. In addition, as the above various sensors,
Sensors for detecting brightness, weight, rain, humidity, temperature, smell, solar radiation and the like can be used.

Further, a large hologram screen can be formed by bonding hologram screens in parallel. In this case, by projecting the image light corrected in accordance with the characteristics of each hologram screen, it is possible to observe an integrated image without a sense of incongruity as a whole. Note that the correction is to adjust the color tone, brightness, and the like of the image light.

[0069]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First Embodiment A hologram display device according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2
As shown in FIG.
Is a hologram screen 11 and a video projector 12 for projecting video light 125 onto the hologram screen 11.
And the lower end 11 of the hologram screen 11
The distance A between 1 and the floor 31 is 110 cm.

The center height C of the hologram screen 11 is 140 cm from the floor surface 31, the distance B between the upper end 112 and the ceiling horizontal plane 32 is 100 cm, and the left end 11
The distance E between 3 and the wall surface 33 and the distance F between the right end 114 and the wall surface 34 are each 35 cm.

The projection angle α of the image light 125 to the hologram screen 11 is 35 degrees, the diagonal length of the hologram screen 11 is 40 inches, and the projection distance D of the image light 125 is 160 cm. The projection distance D is the center of the hologram screen 11,
Projector lens 1 which is a video projector 12 described later
20.

Next, the installation state of the hologram display device 1 according to this embodiment will be described with reference to FIG. FIG. 3 shows a showroom 20 in which the hologram display device 1 according to the present embodiment is installed. Hologram screen 1
Reference numeral 1 denotes a transmission type, and the hologram screen 11 is attached to a window glass 20 in the showroom 2 by applying water. The adhesive for water application used is made of an acrylic ester copolymer, which becomes a transparent film when dried.

Displayed products 25 are displayed behind the hologram screen 11. When no image is displayed, the displayed product 25 can be viewed through the hologram screen 11.

[0074] As shown in FIG.
The image projector 12 is fixed on the ceiling horizontal surface 32 inside the fixing jig 12.
9. The fixing jig 129 fixes the video projector 12 at an inclination angle β = 35 degrees with respect to the ceiling horizontal plane. The lens 120 for projecting the image light of the image projector 12 is operable. The image projector 12 is a commercially available liquid crystal projector of 400 c.
Those capable of emitting a luminance of d / m ² or more (when the image light is normally white) were used.
A and b of the video projector 12 are 4.6, respectively.
−23.7. Further, the image projector can be covered with a natural state, a houseplant, an object, or the like so that the image projector cannot be seen from the observer 8, so that a more mysterious feeling can be produced and the eye catch effect can be enhanced.

The trapezoidal distortion correcting mechanism 14 is arranged behind the horizontal surface 32 of the ceiling of the showroom 20. Further, an optical disk on which a video is recorded and a reproducing device 13 storing the optical disk are arranged. Reproduction device 1
3, the trapezoidal distortion correction mechanism 14 and the video projector 12 are connected by a cable. The trapezoidal distortion correction mechanism 14 corrects and deforms an image input from the reproducing device 13 so that the image has a correct shape when reflected on the hologram screen 11. After that, the trapezoidal distortion correction mechanism 14 sends the video to the video projector 12.

The hologram screen 11 according to the present embodiment
Means that a transmission type hologram element is placed on a PET film.
It is constituted by laminating a plurality of sheets or a plurality of them, pasting a PET film also on the reflection surface and processing it into a sandwich structure. The viewing angle of the hologram screen according to the present example is 35 degrees vertically and 60 degrees horizontally.

Next, the operation and effect of this embodiment will be described. In the hologram display device 1 according to this example, since the hologram screen 11 is installed under the above-described conditions, the viewing angle 89 is exactly within the range of the line of sight of the observer 8.

Therefore, the hologram display device 1 of the present embodiment can display an image within the line of sight of the observer 8 and the hologram screen 11 itself is transparent, It is possible to make it feel as if the image is being projected in an empty space. Therefore, the hologram display device 1 of the present embodiment is excellent in the effect of attracting attention, that is, the eye catching effect.

As described above, according to the present embodiment, it is possible to provide a hologram display device capable of displaying an excellent image and having a high eye catch effect.

In the hologram display device 1 according to this embodiment, the lower end 111 of the hologram screen 11
Hologram screen 11 so that
Is installed. As a result, the hologram screen 11 is installed at a certain distance from the floor surface 31,
Spacious room can be obtained around. For this reason,
Heat can be prevented from accumulating around the hologram screen 11 and heating the hologram screen 11. As described above, according to the present embodiment, it is possible to provide a hologram display device that can prevent image distortion due to heat.

Although the form of the hologram screen according to the present embodiment is a flat plate shape, as another form, a narrow plate-like screen piece is formed in a blind shape.
Alternatively, it is also possible to use a member constructed in the form of a noren and hang it from the ceiling for use. By adopting such a shape, the hologram screen can be stored and stored by rolling up the hologram screen when not in use, thereby saving space.

The hologram screen 11 according to the present embodiment is installed at a location other than the above-mentioned window glass 20 in the showroom 2, as well as in the indoor partition and the like.
It can also be configured to be fitted into a product shelf or the like.

When the hologram screen 11 is attached to the window glass 20 in this embodiment, it can be installed on both the front and back of the window glass 20. In this case, as shown in FIGS. 4C and 4D, the hologram screen 11 can be provided with a tapered cross section in order to prevent the hologram screen 11 from peeling off due to cleaning of the window glass 20 or the like. Alternatively, as shown in FIGS. 4A and 4B, the corner of the hologram screen 11 can be chamfered. This chamfering can be performed by linearly cutting off the corners as shown in FIG. 4A, or can be formed in a curved shape as shown in FIG. 4B.

In the hologram display device 1 according to the present embodiment, as shown in FIG. 5A, one hologram screen 11 is installed independently, and one video projector is provided for one screen. 12 was used to project image light 125. In addition, as shown in FIG. 5B, four hologram screens 11 are arranged and used as one large screen, and the four video projectors 1 are used.
2, the image light 125 can be projected.

Further, as shown in FIG. 5C, the image light 125 can be projected onto the four hologram screens 11 using one large image projector 12. In addition, as shown in FIG.
3 are arranged vertically and horizontally to form a large screen with a diagonal length L,
Can be used.

When a plurality of hologram screens 11 are arranged on the same plane and used as one large screen, the gap length d between the hologram screens 11 is determined by the distance between the observer and the hologram screen 1.
It is determined to some extent by the distance to 1. In other words, as the observer is farther away from the hologram screen 11, even if the gap is larger, the phenomenon that the image to be displayed is cut off and the image becomes hard to see becomes less noticeable. In a case where the observer is located at a distance of several tens of meters, the gap may be 10 cm or more.

The images displayed on the hologram display device according to the present embodiment include, in addition to so-called product advertisements, leisure, weather, traffic congestion information, hot-selling product information, new product information, campaign information such as quizzes, and emergency alerts. Information and the like. Further, the hologram display device according to the present embodiment can be used as a virtual product shelf for introducing products that cannot be exhibited. It can also be used like a touch panel in combination with a touch screen.

In the hologram display device 1 according to the present embodiment, an image position adjusting function or the like attached to the image projector 12 is used so that the image can be properly displayed on the hologram screen 11 without leakage. It is preferable to perform fine adjustment of the image. Since the hologram display device 1 of the present embodiment is constituted by the transmission type hologram screen 11, such adjustment is made by the adjuster by observing the hologram screen 11 from the position of the observer 8 in FIG. There is a need.

The hologram screen 11 of the hologram display device 1 can be installed on a ceiling, a wall, a floor, etc., in addition to the window glass 20 shown in this embodiment. When the hologram screen 11 is attached to the window glass 20, it can be attached using an adhesive tape 191 or a seal 192 as shown in FIG.
In this case, there are a method of fixing all the edges of the hologram screen 11 as shown in FIG. 7A and a method of fixing only the vertexes of the four corners as shown in FIG. 7B.

The interference fringes indispensable for the hologram screen 11 to function as a screen are delicate, and are broken when a strong force is applied. Adhesive tape 1
By using the seal 91 and the seal 192, the hologram screen 11 can be peeled off with a small force, so that the hologram screen 11 once fixed can be attached to another place and reused.

Further, the image projector may be arranged outside the show room, and the image light may be applied to the hologram screen attached to the window glass 20 from outside. In this case, the same effect as that of the present embodiment can be obtained even when an image projected on the hologram screen is observed from inside the showroom. Furthermore, the hologram screen is a window glass 2
It can be attached to both sides (that is, inside and outside the showroom) of 0, and the effect of the present example can be obtained in both cases.

Embodiment 2 In this embodiment, as shown in FIGS. 8 to 10, a hologram display device 1 on which a video projector 12 is placed on the floor will be described. As shown in FIGS. 8 and 9, the hologram display device 1 according to the present embodiment is also installed in a show room, and a hologram screen 11 attached to a window glass 20 and an image fixed on a gantry 16 and arranged on a floor 31. And a projector 12.

In the hologram display device 1, the distance A is 130 cm, the center height C is 160 cm, the projection distance D is 160 cm, and the distances E and F are 35 cm. The projection angle α is 35 degrees. In the hologram display device 1 according to the present example, a thermal stress relaxation film 119 made of biaxially stretched PET is attached to the hologram screen 11. Others are the first embodiment.
Is the same as

In the hologram display device 1 according to the present embodiment, the video projector 12 is arranged below the hologram screen 11 and the hologram screen 11 is arranged in such a positional relationship as described above.

As a result, it is possible to prevent the zero-order light from the video projector 12 from entering the line of sight of the observer 8.
Further, the viewing angle of the hologram screen 11 can be set within the range of the line of sight of the observer 8. Therefore, an excellent eye catching effect can be obtained. Further, the video projector 12
Since it is placed on the floor, there is no need for ceiling work and installation is easy. Further, since the thermal stress relaxation film 119 is attached, deformation of interference fringes due to thermal stress can be more strongly prevented. Others have the same operation and effects as the first embodiment.

The image projectors 12 according to the first embodiment and the present example are respectively installed above or below the hologram screen 11, but they are located at positions t1 and t2 in FIG. It means that there is. Then, as shown in FIG. 10, the projection angle α is defined as the center 110 of the hologram screen 11.
Assuming a cone having an apex at the top, a state is shown in which the image projector is installed around the circumference of the circle that forms the bottom surface of the cone.

That is, in addition to the position t1 above the hologram screen 11 and the position t2 below the hologram screen 11, the image is displayed at a position t3 obliquely above the hologram screen 11, and at a position t4 obliquely below the hologram screen 11. When the projectors are installed, the projection angles of all the video projectors are equal to α. Therefore, α
By installing the video projector on the circumference shown in FIG. 10 in which the angle is 20 to 50 degrees, the same effect as in the first embodiment can be obtained.

Embodiment 3 This embodiment is, as shown in FIG.
1 is a hologram display device 1 in which two mirrors are provided between a hologram display device 1 and a video projector 12. As shown in FIG. 11, a hologram screen 11 supported on a support 40 and a first mirror 4 supported on a support 404 are provided on a base 401.
1, a video projector 12 disposed on a gantry 402, a gantry 403 installed above the video projector 12, and a second mirror 42. Others are the same as the first embodiment.

In the hologram display device 4 according to the present embodiment, the image light emitted from the image projector 12 is reflected by the first mirror 41 and travels to the second mirror 42. After being reflected by the second mirror 42, the image light reaches the hologram screen 11 and projects an image.

According to the hologram display device 4 of this embodiment, the image projector 12 and the hologram screen 1
Although the distance from the first mirror 41 and the second mirror 4 is short,
By reflecting the image light at 2, it is possible to project an image of 40 inches or more, and it is possible to increase the optical path length required to secure an incident angle of 35 degrees. Therefore, the hologram display device 4 that can be installed in a narrower space can be obtained.

Further, by using a concave mirror or a convex mirror as the mirror to be used, the optical path long distance can be adjusted. In addition, by coloring the mirror and the hologram screen, it is possible to adjust the difference in the optical path length between the upper end and the lower end of the hologram screen, and to adjust the focus blur between the upper and lower portions. In particular, a trapezoidal distortion correction effect can be obtained by using an aspherical mirror.

Fourth Embodiment As shown in FIG. 12, this embodiment is a hologram display device 1 including a hologram screen 11 and an image projector 12 which are installed from the horizontal surface 32 of the ceiling by arms 117 and 127. In the hologram display device 1, the hologram screen 11 is inclined to increase the distance between the hologram screen 11 and the projection distance D of the image light. Others have the same configuration, operation and effect as those of the first embodiment.

Embodiment 5 The hologram display device of this embodiment reflects the image light emitted from the image projector by using a mirror, and drives the mirror while changing the angle by a driving device to form a plurality of hologram screens. It is configured to form an image. Furthermore, rails are provided on the ceiling surface, floor surface, and the like, and are moved together with the video projector alone or the mirror so that a new effect can be obtained.

Embodiment 6 As shown in FIGS. 13 and 14, this embodiment is a hologram display device using a hologram screen formed by bonding a mirror and a hologram element. As shown in FIG. 14, the hologram screen 61 according to the present embodiment is configured by attaching a mirror 63 to a transmission hologram element 62. Then, the image light 125 is projected onto the hologram screen 61 from the side where the hologram element 62 exists by using the image projector 12. Others are the same as the first embodiment.

An image is displayed on the hologram screen 61 according to the present example as follows. As shown in FIG. 14, image light 125 is projected from the image projector 12.
The image light 125 passes through the transmission type hologram element 62 and reaches the mirror 63. The image light 125 is reflected on the surface of the mirror 63 and enters the hologram element 62 again.

The hologram element 62 is of a transmission type.
The interference fringes in the hologram element 62 diffract only the image light 125 reflected by the mirror 63 in the direction of the arrow 650. As a result, the video projector 125 disposed on the hologram element 62 side is present at the position of the reference numeral 65 on the mirror 63 side, and it looks as if the video light 655 is projected from here.

As shown in FIG. 13, when the hologram screen 61 is installed in a sufficiently bright place, the surrounding scenery 85 is reflected on the mirror 63 (an arrow 66 shown in FIG. Trajectory). The person 8 standing in front of the hologram screen 61 is also reflected on the mirror 63. Thus, the image 850 of the scenery 85 and the image 80 of the person 8 are reflected on the hologram screen 61.

As described above, the hologram screen 61 of the hologram display device 6 according to the present embodiment has the surrounding scenery 85, the person 8 standing in front of the hologram screen 61, and the image light 125 projected from the image projector 12.
Will be displayed together.
Therefore, the person 8 can feel as if the scenery 85 behind the person 8 is reflected on the hologram screen 61 and an image is displayed thereon.

As described above, the effect that the observer himself can be seen in the projected image and the eye catch effect is further enhanced,
Alternatively, an active approach such as taking a composite photograph can be obtained.

Embodiment 7 This embodiment is a hologram display device constructed by attaching an antireflection film or a polarizing film to a hologram screen as shown in FIG. As shown in FIG. 17, the hologram display device 1 of the present embodiment includes a hologram screen 11 attached to an inner side surface 201 of a window glass 20 and a ceiling horizontal surface 32, as in the first embodiment.
And a video projector 12 fixed to the

A polarizing film 791 is stuck on the indoor side of the hologram screen 11, and an anti-reflection film 792 is provided on the outside of the door via the window glass 20. Note that in FIG.
Reference numeral 7 denotes an outdoor, and reference numeral 79 denotes an outdoor background. Others are the same as the first embodiment.

In the hologram display device 1 according to this embodiment, when an observer observes the hologram screen, the following phenomenon occurs. An illuminating device 75 is installed on the ceiling horizontal surface 32 of the showroom 2. Illuminating light emitted from the illuminating device 75 is reflected on the indoor background 78 and the like, and the reflected light 751 passes through the hologram screen 11 and is transmitted to the observer 8. Will arrive. In the outside 7, the direct sunlight 701 and the direct sunlight 701 from the sun 70 are reflected by the window glass 20 on the outside background 79 or the like, and the reflected light 702 reaches the observer 8.

If the polarizing film 791 according to the present example is not provided, the reflected light 751 overlaps the image projected on the hologram screen, the background luminance increases, and the contrast of the image decreases. If the antireflection film 792 according to the present embodiment is not provided, the direct sunlight 701 and the reflected light 702 are reflected by the window glass 20, so that the brightness of external light is increased and the contrast of the image is reduced. As described above, the image contrast is (image white screen luminance + background luminance + external light luminance)
/ (Image black screen luminance + background luminance + external light luminance).

As described above, by providing the polarizing film 791 and the antireflection film 792 to the hologram screen 11, the background luminance and the external light luminance can be reduced, and the contrast of the image can be further increased.
As a result, it is possible to obtain an image appearance that can sufficiently secure the eye catch effect.

Embodiment 8 This embodiment describes a hologram screen used in a hologram display device. As shown in FIGS. 18, 19, and 20, the shape of the hologram screen 11 is not particularly limited, and the hologram screen 11 has a desired shape including the shapes described in these drawings and the shapes not described here. Can be used in a hologram display device.

In each of the hologram screens 11 shown in FIGS. 18, 19 and 20, the lower end 111 has a lowermost portion in the hologram screen if the side is a side.
The side is the lower end (FIGS. 18 (a), 19 (a), 20 (b), etc.). If the lowermost part is a vertex or an arc, a straight line including that part is the lower end (FIG. 18D,
19 (b) and 20 (a). If the lowermost part does not contribute to the image, the part contributing to the image is the lower end 111 (FIGS. 20 (e) and 20 (f)). Also,
Each of the hologram screens 11 shown in FIGS. 18, 19, and 20
In, the center is the position of the center of gravity of each hologram screen. In the case of FIGS. 20E and 20F, the position of the center of gravity of the portion contributing to the image is obtained.

When projecting image light on the hologram screen 11, an image may not be formed on the entire surface of the hologram screen 11, and as shown in FIG. Image 10
0 can also be projected. Others are the same as the first embodiment. Further, even when such a hologram screen 11 is used, the same operation and effect as those of the first embodiment can be obtained.

Embodiment 9 In this embodiment, as shown in FIGS. 22 and 23, the installation location of the hologram display device will be described. As shown in FIG. 22, the hologram display device 1 of the present embodiment has the same configuration as that of the first embodiment, and a floor surface 311 on which the observer 8 stands and a floor in the show room 2 where the hologram display device 1 is installed. The height from the surface 312 is different. In this case, the lower end 111 of the hologram screen 11
Is at a distance of 80 to 180 cm from the floor surface 311 (A in the same figure). Alternatively, the center height of the hologram screen 11 is at a distance of 110 to 210 cm from the floor surface 311 (C in the same figure).

As shown in FIG. 23, the hologram display device 1 of this embodiment has the same configuration as that of the first embodiment, and is installed in a showroom 2 having a sloped ceiling. In the case of such a showroom 2, a straight line perpendicular to the installation surface 118 of the hologram screen 11 is not parallel to the surface of the ceiling. In this case, a plane including the vertical straight line is defined as a ceiling horizontal plane 32, and an angle β formed between the ceiling horizontal plane 32 and the video projector 12 is an inclination angle, and the inclination angle is 20 to 50 degrees.

[Brief description of the drawings]

FIG. 1 is an explanatory side view of a hologram display device according to a first embodiment.

FIG. 2 is an explanatory plan view of the hologram display device according to the first embodiment.

FIG. 3 is an explanatory view of installation of the hologram display device according to the first embodiment.

4A and 4B are plan views of a hologram screen with chamfered corners according to the first embodiment, and FIG.
(D) A sectional view of a hologram screen provided with a sectional taper.

FIG. 5 is an explanatory diagram of a configuration when a plurality of hologram screens are used according to the first embodiment.

FIG. 6 is an explanatory diagram showing a diagonal length when a plurality of hologram screens are used according to the first embodiment.

FIG. 7 is an explanatory diagram of a case where the hologram screen according to the first embodiment is adhered with (a) an adhesive tape or (b) a seal.

FIG. 8 is an explanatory side view of the hologram display device according to the second embodiment.

FIG. 9 is an explanatory plan view of the hologram display device according to the second embodiment.

FIG. 10 is an explanatory diagram showing a hologram screen and an installable position of a video projector when the projection angle is α according to the second embodiment.

FIG. 11 is an explanatory perspective view of a hologram display device having two mirrors according to a third embodiment.

FIG. 12 is a side view illustrating a hologram display device according to a fourth embodiment, in which a hologram screen and a video projector are suspended from a ceiling surface.

FIG. 13 is an explanatory diagram showing a configuration and a use state of a hologram display device according to a sixth embodiment.

FIG. 14 is an explanatory view showing the principle of a hologram screen according to the sixth embodiment.

FIG. 15 is an explanatory view showing a method of manufacturing a transmission type hologram screen according to the present invention.

FIG. 16 is an explanatory view showing a method of manufacturing a reflection type hologram screen according to the present invention.

FIG. 17 is an explanatory diagram showing a configuration of a hologram display device according to a seventh embodiment.

FIG. 18 is an explanatory view showing various forms of hologram screens according to the eighth embodiment.

FIG. 19 is an explanatory view showing various forms of hologram screens according to the eighth embodiment.

FIG. 20 is an explanatory view showing various forms of hologram screens according to the eighth embodiment.

FIG. 21 is an explanatory diagram of a hologram screen partially showing an image according to the eighth embodiment.

FIG. 22 is an explanatory diagram of the hologram display device according to the ninth embodiment, which is installed at a place where the height of the floor of the show room and the floor of the observer are different.

FIG. 23 is an explanatory diagram of a hologram display device installed in a showroom having a sloped ceiling according to Embodiment 9;

[Explanation of reference numerals] 1, 4, 6. . . Hologram display device, 11, 61. . . Hologram screen, 111. . . Lower end, 112. . . Top end, 12 . . Video projector, 14. . . 30. trapezoidal distortion correction mechanism . . Floor, 32. . . Ceiling horizontal surface, 89. . . Viewing angle,

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2H049 CA01 CA07 CA22 2K008 AA04 CC03 EE01 FF24 HH27 5G435 AA00 BB12 BB17 DD02 DD07 FF05 GG02 GG08 GG46 HH03 KK07 LL15

Claims (10)

[Claims] 1. A hologram comprising: a hologram screen; and an image projector for projecting image light onto the hologram screen, and a lower end of the hologram screen is at a distance of 80 to 180 cm from a floor surface. Display device. 2. A hologram screen comprising: a hologram screen; and an image projector for projecting image light onto the hologram screen, wherein a center height of the hologram screen is 110 to 210 cm from a floor surface. Hologram display device. 3. A hologram screen and an image projector for projecting image light onto the hologram screen, and a projection angle of the image projector to the hologram screen is 20 to 50 degrees. Hologram display device. 4. The method according to claim 1, wherein:
A hologram display device, wherein the hologram display device is provided with a trapezoidal distortion correction mechanism. 5. The method according to claim 1, wherein:
A hologram display device wherein the diagonal length of the hologram screen is 30 inches or more, and the projection distance of image light is 90 cm or more. 6. The method according to claim 1, wherein:
The distance between the diagonal length of the hologram screen and the projection distance is y = ax + b (where x is the diagonal length [inch],
a hologram display apparatus, wherein y satisfies a relationship of a projection distance [cm], and a and b are coefficients determined by a video projector. 7. The method according to claim 1, wherein:
The hologram screen has a contrast of 1.5 or more (where the contrast is (image white screen luminance + background luminance +
External light luminance) / (Video black screen luminance + Background luminance + External light luminance)
Hologram display device, wherein the hologram display device is installed in an environment where 8. The method according to claim 1, wherein:
The hologram screen has chamfered corners,
Alternatively, a hologram display device characterized in that a cross section of the hologram screen is provided with a taper. 9. The method according to claim 1, wherein:
The hologram display device, wherein the hologram screen is installed by applying water. 10. The hologram display device according to claim 1, wherein the image projector is fixed at a tilt angle of 20 to 50 degrees with respect to a horizontal plane of a ceiling by a fixing jig.