JP2016212375A - Device of displaying information on inside of water tank, and projection system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device of displaying information on the inside of a water tank that can display a virtual image having high luminance in the inside of a water tank with a simple configuration including a projector part and an intermediate screen.SOLUTION: A device of displaying information on the inside of a water tank 100 of the present invention is a device of displaying information on the inside of a water tank 100 that causes a viewer to visually recognize a display as a virtual image in the inside of a water tank from the viewer's visual area assumed in advance, comprises a projector part 83 that projects an image and an intermediate screen 40 that forms the image projected by the projector part 83 into an image, and performs display by reflecting the image formed by the intermediate screen 40 on a water tank wall part 90.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a water tank information display device that allows a viewer to visually recognize a display as a virtual image in a water tank, and a projection system using such a water tank information display device.

  An apparatus capable of displaying a virtual image in water in an aquarium such as an aquarium has been proposed.

  For example, in cited document 1 (Japanese Patent No. 3707944), a projector, a primary screen that projects an image from the projector on a surface opposite to the projector, and an image projected on the primary screen are described. A projection-type image projection apparatus including a transparent secondary screen capable of reflecting is disclosed.

Further, in Cited Document 2 (Act No. 1942770), an information feeder made of a cathode ray tube is provided in front of the transparent plate of the aquarium, and the installation location of the information feeder and the aquarium having the transparent plate as a symmetry plane An information display device for an aquarium is disclosed in which the intensity of the inner symmetric position is set brighter than the latter.
Japanese Patent No. 3707944 Noto 1942770 gazette

  Although the thing of the cited reference 1 and the cited reference 2 uses a projector and a liquid crystal screen, or uses a cathode ray tube, in order to visually recognize a virtual image, the light (video) which reflects the outer wall of an aquarium is used. In the conventional technology as described above, the diffusion angle of the light projected on the outer wall of the water tank is not controlled as a display image, and it is installed outdoors. However, there is a problem that the visibility of a virtual image cannot be secured because the image is dark. Further, when the conventional technique is used for a water tank installed in a dark room, there is a problem that the apparatus unintentionally illuminates the room.

  The present invention is for solving the above-described problems, and the information display device in the aquarium according to the present invention displays a virtual image in the aquarium for the viewer from the visual region of the viewer assumed in advance. An information display device in the aquarium to be visualized as, comprising a projector unit that projects an image, and an intermediate screen that forms an image projected by the projector unit, and an image formed on the intermediate screen, The display is performed by reflecting on the aquarium wall.

  In the aquarium information display device according to the present invention, the intermediate screen has two main surfaces, one main surface is provided with a microlens array composed of a plurality of microlenses, and the other main surface is smooth. It is a microlens array substrate which is a surface.

  In the aquarium information display device according to the present invention, the intermediate screen has two main surfaces, one main surface is provided with a microlens array composed of a plurality of microlenses, and the other main surface is light. It is a microlens array / light diffusion base material which is a diffusion surface.

  In the aquarium information display device according to the present invention, the intermediate screen has two main surfaces, one main surface is provided with a microlens array composed of a plurality of microlenses, and the other main surface is smooth. A microlens array substrate that is a surface, a light diffusion substrate that has two main surfaces, a light diffusion surface is provided on one main surface, and the other main surface is a smooth surface, The main surface of the lens array substrate on which the microlens array is provided and the main surface of the light diffusion substrate on which the light diffusion surface is provided are arranged to face each other.

  In the aquarium information display device according to the present invention, the projector unit includes a laser light source that generates a laser beam and a scanning unit that scans the intermediate screen with the laser beam.

  In the aquarium information display device according to the present invention, the projector section includes a light source that generates light and an LCOS element that reflects the light to the intermediate screen.

  In the aquarium information display device according to the present invention, the projector section includes a light source that generates light and a DMD element that reflects the light to the intermediate screen.

  In the aquarium information display device according to the present invention, the projector unit and the intermediate screen are attached to a movable stage.

  In the aquarium information display device according to the present invention, a plane including the intermediate screen and a plane including the aquarium wall are not parallel.

  Moreover, the information display apparatus in the water tank which concerns on this invention is characterized by a structure being arranged between the virtual image in the said water tank, and the said water tank wall part.

  In the aquarium information display device according to the present invention, the structure is a bubble generating device.

  Further, the projection system according to the present invention includes the aquarium information display device, a viewer wireless communication unit held by a viewer, a water tank wireless communication unit arranged in the vicinity of the water tank, and the viewer wireless communication unit. A communication detection unit that detects communication with the aquarium wireless communication unit, and an information processing device that stores projection data to be visualized as a virtual image by the viewer, wherein the communication detection unit is the viewer When communication is detected between the wireless communication unit and the water tank wireless communication unit, the information processing device transmits the projection data to the information display device in the water tank.

  In addition, the projection system according to the present invention stores the information display device in the aquarium, a sensor unit that is arranged in the vicinity of the aquarium and detects the presence / absence of a viewer, and projection data that is visually recognized by the viewer as a virtual image. An information processing device, and when the sensor unit detects the presence of a viewer, the information processing device transmits the projection data to the aquarium information display device.

  According to the information display device in the aquarium according to the present invention, it is possible to display a high-luminance virtual image in the aquarium with a simple configuration such as a projector unit or an intermediate screen. Can be ensured, and when used in a dark room, the effect of not unnecessarily illuminating the room can be obtained.

It is a figure which shows the structure of the information display apparatus 100 in the water tank which concerns on embodiment of this invention. 2 is a perspective view of a microlens array substrate 50 used as an intermediate screen 40. FIG. It is the figure which looked at the micro lens array 54 extended in a 1st direction and a 2nd direction from the z-axis direction. It is a figure explaining the definition of a diffusion angle. It is a figure which shows the intermediate | middle screen 40 used for the information display apparatus 100 in the water tank which concerns on other embodiment of this invention. It is a figure which shows the intermediate | middle screen 40 used for the information display apparatus 100 in the water tank which concerns on other embodiment of this invention. It is a figure which shows the intermediate | middle screen 40 used for the information display apparatus 100 in the water tank which concerns on other embodiment of this invention. It is a figure which shows the structure of the information display apparatus 100 in the water tank which concerns on other embodiment of this invention. It is a figure which shows the structure of the information display apparatus 100 in the water tank which concerns on other embodiment of this invention. It is a figure explaining the relationship between the plane containing the intermediate | middle screen 40, and the plane containing the tank wall part 90 which reflects an image. It is a figure explaining the visual effect by the information display apparatus 100 in the tank which concerns on other embodiment of this invention. It is a figure which shows the structure of the projection system 200 which concerns on embodiment of this invention. It is a figure which shows the structure of the projection system 200 which concerns on other embodiment of this invention. It is a figure which shows the structure of the projection system 200 which concerns on other embodiment of this invention. 3 is a conceptual diagram of tiling of a microlens array substrate 50. FIG. It is a figure explaining the calculation conditions of the numerical aperture of the micro lens array base material.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing a configuration of an aquarium information display device 100 according to an embodiment of the present invention. Note that the drawings described below are schematic views and may differ from actual shapes, dimensions, and arrangements.

  The in-aquarium information display device 100 causes the viewer to visually recognize the display as a virtual image in the aquarium from the visual region (E) assumed for the viewer. According to such an aquarium information display device 100, the virtual image and the background of the virtual image can be simultaneously viewed, so that the viewer can recognize more information without shifting his line of sight. Is possible.

  The aquarium information display device 100 includes a projection unit 85 that projects an image, and the projection unit 85 includes an intermediate screen 40 and a projector unit 83. The aquarium wall 90 is configured to superimpose and display the virtual image on the front visual field by causing the display by the projection unit 85 to be visually recognized as a virtual image. It is assumed that the aquarium wall 90 is basically transparent.

  Next, the detail of the projection unit 85 which comprises the information display apparatus 100 in a water tank is demonstrated. FIG. 1 shows an example of the structure of the projection unit 85 of the aquarium information display device 100 according to the embodiment of the present invention.

  The coordinates in the projection unit 85 are defined by the xyz three-dimensional orthogonal coordinates shown in FIG. For example, the light emitted from the first light source 11 is light emitted in a direction parallel to the y direction. Further, it is assumed that the optical axis of the collimator lens 35 is in a direction parallel to the z direction.

  From the projection unit 10 in the projection unit 85, light of a projection image displayed by the in-aquarium information display device 100 is emitted. The projection unit 10 includes a first light source 11, a second light source 12, a third light source 13, a first dichroic prism 21, a second dichroic prism 22, a condenser lens 26, and the like.

  The first light source 11, the second light source 12, and the third light source 13 emit light having different wavelengths. The first light source 11 emits light of the first wavelength, and the second light source 12 emits the second light. The third wavelength light is emitted from the third light source 13. In the present embodiment, for example, the first wavelength light emitted from the first light source 11 is blue light, the second wavelength light emitted from the second light source 12 is green light, and the third light source. The light of the third wavelength emitted from 13 can be red light.

  As the first light source 11, the second light source 12, and the third light source 13, various laser devices such as a semiconductor laser device (laser light source) that emits laser light as coherent light can be used.

  In the present embodiment, the first wavelength light emitted from the first light source 11 and the second wavelength light emitted from the second light source 12 are incident on different surfaces of the first dichroic prism 21, respectively. The light of the third wavelength emitted from the third light source 13 is disposed so as to enter the second dichroic prism 22.

  In the first dichroic prism 21, the first wavelength light emitted from the first light source 11 is transmitted, and the second wavelength light emitted from the second light source 12 is reflected. Thereby, the light of the first wavelength and the light of the second wavelength are combined.

  The light having the first wavelength and the light having the second wavelength combined in this manner enter the second dichroic prism 22.

  In the second dichroic prism 22, the first wavelength light emitted from the first light source 11 and the second wavelength light emitted from the second light source 12 are transmitted, and the first light emitted from the third light source 13 is transmitted. Light of wavelength 3 is reflected. Thereby, the light of the first wavelength, the light of the second wavelength, and the light of the third wavelength are combined.

  In this way, the first wavelength light, the second wavelength light, and the third wavelength laser light combined by the second dichroic prism 22 are reflected by the projection mirror 30 via the condenser lens 26. , And enters the collimator lens 35. The projection mirror 30 has a function capable of changing the angle two-dimensionally, whereby the incident light can be scanned two-dimensionally, and a projection image by a desired laser beam is formed. The

  The projection mirror 30 further moves along a first axis (not shown) parallel to the x-axis so that the projection mirror 30 can move in the (a) direction, and a second axis (not shown) orthogonal to the first axis. ) About the direction of (b).

  The projection mirror 30 can be appropriately replaced with another optical member as long as it can scan incident light in a two-dimensional manner. As such an optical member, a galvanometer can be used. A mirror, a galvanometer scanner, a polygon mirror, a prism, an acoustooptic device, an optical device using a MEMS (Micro Electro Mechanical System) technology, or the like can be used as appropriate.

The laser light reflected by the projection mirror 30 scans the collimator lens 35 to form a projection image by the desired laser light. In the present embodiment, the point (r ₀ ) where the laser light is incident on the projection mirror 30 and reflected is set so as to exist on the optical axis of the collimator lens 35. The collimator lens 35 collimates the laser light incident from the projection mirror 30 and emits it toward the intermediate screen 40.

  A projected image by the incident laser beam is formed on the intermediate screen 40. The aquarium wall 90 displays the image I formed on the intermediate screen 40 by reflection. Thereby, it is possible to cause the viewer to visually recognize the display as the virtual image I ′ from the visual region (E) of the viewer assumed in advance. The intermediate screen 40 is an optical member made of a transparent base material having a predetermined transparency or higher. The intermediate screen 40 can be configured by molding using an organic resin material, or can be configured by using an inorganic material such as glass.

  In this embodiment, the microlens array substrate 50 is used as the intermediate screen 40, but other substrates may be used.

  In the present embodiment, an optical system including a collimator lens 35 is disposed between the projection mirror 30 and the intermediate screen 40, but these are not necessarily essential constituent elements. Further, a projection optical system can be appropriately used between the intermediate screen 40 and the water tank wall 90.

  Here, the intermediate screen 40 used in the aquarium information display device 100 according to the present invention will be described in more detail. FIG. 2 is a perspective view of a microlens array substrate 50 used as the intermediate screen 40.

  The microlens array substrate 50 has a first main surface 51 and a second main surface 52, and a microlens array 54 in which a plurality of microlenses 53 are periodically arranged on the first main surface 51. And the second main surface 52 is a smooth surface 55. The microlens array substrate 50 is made of a transparent substrate.

  The direction of the axis parallel to the x-axis is defined as the first direction, and the direction of the axis parallel to the y-axis is defined as the second direction (orthogonal relationship with the first direction).

  Here, when the viewer visually views the aquarium wall 90, the first direction of the intermediate screen 40 (microlens array substrate 50) is a direction in which an image that is viewed as a horizontal image by the viewer is formed. The second direction of the intermediate screen 40 (microlens array substrate 50) is a direction in which an image viewed as a vertical image by a viewer is formed.

  Under the definitions as described above, the microlens array substrate 50 that is the intermediate screen 40 has a main surface that extends in a first direction and a second direction orthogonal to the first direction.

  FIG. 3 is a view of the microlens array 54 spreading in the first direction and the second direction as seen from the z-axis direction. As shown in the figure, in the intermediate screen 40 (microlens array substrate 50) according to the present embodiment, the microlens 53 is a square having a side length d when viewed from the z-axis direction. Something is used. Note that the microlens 53 may not be square, and may be, for example, a regular hexagon. However, it is preferable that the adjacent microlenses 53 are in close contact with each other, and a smooth surface that does not form a lens does not remain in the gap between the adjacent microlenses 53. This is to reduce the linearly transmitted light.

Each microlens 53 is a spherical lens or an aspherical lens, and has a curvature with a radius of curvature R _{1 in} the first direction and a radius of curvature R _{2 in} the second direction at the apex on the first main surface 51 side. Has a curvature of. The apex means a point where each micro lens 53 protrudes most in the z-axis direction.

Then, the cross-sectional shape of the surface of each microlens 53 that is parallel to the first direction and includes the optical axis of the microlens 53 is a surface that is parallel to the second direction and includes the optical axis of the microlens 53. It is preferable to make it different from the cross-sectional shape in FIG. More specifically, the radius of curvature R ₁ of the first direction in the first principal surface 51 side apex of each microlens 53, it is also possible to equalize the radius of curvature R ₂ of the second direction, varying Is preferred.

In general, the aspect ratio of the image information displayed on the in-aquarium information display device 100 is different, and the reduction in the luminance at the periphery of the image is suppressed around the upper and lower ends of the image and the periphery of the left and right ends of the image. in the to the same extent, the radius of curvature R ₁ of the first direction in the first principal surface 51 side apex of each microlens 53, because it is better to the curvature of the second and radial R ₂ are different is there.

Furthermore, in general, taking into account that the image information displayed on the information display device 100 in the aquarium is horizontally long, the radius of curvature R in the first direction at the apex of each microlens 53 on the first main surface 51 side. ₁ is preferably smaller than the radius of curvature R ₂ in the second direction.

  In the aquarium information display device using a laser light source as the light source of the aquarium information display device 100, the use of the microlens array 54 has an advantage that speckle noise due to laser light is suppressed.

  Next, when the intermediate screen 40 (microlens array base material 50) is used for the information display apparatus 100 in the water tank, optical characteristics preferable as the intermediate screen 40 will be described. First, since the diffusion angle is frequently used below, this is defined.

FIG. 4 is a diagram for explaining the definition of the diffusion angle. In this specification, the maximum scattering of light emitted when light substantially parallel to the principal surface normal direction is incident from the microlens array base material 50 and the light diffusion base material 60 constituting the intermediate screen 40. The full width at half maximum (FWHM), which is the difference between the two angles that are half the light intensity I _max , is defined as the diffusion angle θ. The scattered light intensity depends on the Y value of the XYZ color system (CIE 1931 color system) and is measured by a three-dimensional variable angle spectrophotometric system (GCMS-13 type, manufactured by Murakami Color Research Laboratory Co., Ltd.). ing.

Under the above definition, the microlens array substrate 50 has a diffusion angle θ ₁ corresponding to the horizontal direction (first direction) of display by the aquarium information display device 100 and a display by the aquarium information display device 100. It is preferable that there is a relationship of θ ₁ > θ ₂ between the diffusion angle θ ₂ corresponding to the vertical direction (second direction). This is because the image information displayed on the aquarium information display device 100 is horizontally long.

Further, the horizontal diffusion angle θ ₁ is preferably 20 ° or more and 60 ° or less, and the vertical diffusion angle θ ₂ is preferably 5 ° or more and 35 ° or less. More preferably, when the horizontal diffusion angle θ ₁ is 20 ° or more and 50 ° or less and the vertical diffusion angle θ ₂ is 10 ° or more and 30 ° or less, the intermediate screen 40 used in the aquarium information display device 100 is optimal. It will be something. This realizes high-intensity virtual image display while suppressing the output of the light source while keeping the luminance at the periphery of the image uniform for the viewer facing the virtual image and illuminating the room as much as possible. The above range is optimal when the processing accuracy of the microlens array and the design freedom of the virtual image size are allowed.

  Next, the material of the base material that becomes the base of the intermediate screen 40 will be described. The base material used as the base of the intermediate screen 40 may be any transparent material, such as thermoplastic resin, thermosetting resin, UV curable resin, electron beam curable resin, or glass. Can be used.

  If a thermoplastic resin is used as the base material of the intermediate screen 40, for example, polycarbonate resin, acrylic resin, fluorine acrylic resin, silicone acrylic resin, epoxy acrylate resin, polystyrene resin, cycloolefin Examples thereof include polymers, methylstyrene resins, fluorene resins, PET, and polypropylene.

  Further, the intermediate screen 40 is not necessarily formed from one base base material. For example, in the case of the microlens array substrate 50, the microlens array 54 and the like and the substrate-like member may be configured as separate members, and these may be bonded together with an adhesive or the like. However, in this case, it is preferable that all members have the same refractive index.

  According to the information display device 100 in the aquarium according to the present invention, it is possible to display a high-intensity virtual image in the aquarium with a simple configuration such as the projector unit 83 and the intermediate screen 43, and an image when used outdoors. Can be ensured, and when used in a dark room, the effect of not unnecessarily illuminating the room can be obtained. Such an effect of the present invention is largely due to the fact that the diffusion angle of the intermediate screen 40 is controlled.

  In the above embodiment, the laser scanning method including the projection unit 10 and the projection mirror 30 has been described based on an example in which the display unit 100 is applied as a drawing method of the in-aquarium information display device 100. The display unit 100 according to the invention employs an LCOS method using a light source and an LCOS (Liquid crystal on silicon) element, or a light source and a DMD (Digital Mirror Device) element as a drawing method. The present invention can also be applied to a device employing a DLP (Digital Light Processing) method. Examples of the light source include a halogen lamp, a metal halide lamp, an ultrahigh pressure mercury lamp, an LED, and a semiconductor laser.

  In the case of the LCOS method, the light from the light source is selectively reflected by the LCOS element, which is a reflective liquid crystal element, with respect to the intermediate screen 40, and in the case of the DLP method. Realizes the information display device 100 in the aquarium by selectively reflecting the light from the light source with respect to the intermediate screen 40 by the DMD element which is a reflective element in which a plurality of micromirrors are arranged. can do.

  Next, another embodiment of the present invention will be described. In the aquarium information display device 100 according to another embodiment of the present invention, the intermediate screen 40 used is different from the aquarium information display device 100 according to the previous embodiment.

  FIG. 5 is a view showing an intermediate screen 40 used in the aquarium information display device 100 according to another embodiment of the present invention. In the present embodiment, a microlens array / light diffusion base material 70 is used as the intermediate screen 40. In addition, the arrow in a figure has shown the light into which the light from the collimator lens 35 injects.

  The microlens array / light diffusing substrate 70 has a first main surface 71 and a second main surface 72, and a plurality of microlenses 73 are periodically arranged on the first main surface 71. A lens array 74 is provided, and the second main surface 72 is a light diffusion surface 75. The microlens array substrate 70 is made of a transparent substrate.

  The light diffusing surface 75 is composed of fine irregularities having a random cycle. Such a light diffusion surface 75 is configured by providing fine scratches on a smooth surface, for example, like ground glass. In order to configure the light diffusion surface 75, blasting such as sand blasting or bead blasting is suitable.

  Even when the microlens array / light diffusion base material 70 as described above is used, the same effects as those of the previous embodiment can be obtained.

  Next, another embodiment of the present invention will be described. The information display device 100 in the aquarium according to another embodiment of the present invention is also different from the information display device 100 in the aquarium according to the previous embodiment because the intermediate screen 40 used is different from the information display device 100 according to the previous embodiment.

  6 and 7 are views showing an intermediate screen 40 used in the aquarium information display device 100 according to another embodiment of the present invention. In the present embodiment, two sheets of the microlens array substrate 50 and the light diffusion substrate 60 described so far are used as the intermediate screen 40. In addition, the arrow in a figure has shown the direction in which the light from the collimator lens 35 injects.

  The light diffusing substrate 60 has a first main surface 61 and a second main surface 62, a light diffusing surface 64 is provided on the first main surface 61, and the second main surface 62 is a smooth surface 65.

  The light diffusing surface 64 is composed of fine irregularities having a random period. Such a light diffusing surface 64 is configured by providing fine scratches on a smooth surface like ground glass, for example. In order to configure the light diffusion surface 64, blasting such as sand blasting or bead blasting is suitable.

  In the intermediate screen 40 according to the present invention, the first main surface 51 provided with the microlens array 54 of the microlens array substrate 50 and the first main surface provided with the light diffusion surface 64 of the light diffusion substrate 60. 61 are arranged opposite to each other. Further, the facing distance between the microlens array substrate 50 and the light diffusion substrate 60 is preferably 0 μm or more and 100 μm or less.

  The surface on which the light from the collimator lens 35 is incident may be on the smooth surface 55 side of the microlens array substrate 50 as shown in FIG. 6, or as the smooth surface 65 of the light diffusion substrate 60 as shown in FIG. Also good. However, the former layout can make the brightness of the virtual image more uniform.

  Note that the above-described distance between the opposing surface is the top where the microlens array 54 protrudes most from the main surface of the microlens array substrate 50 and the top where the light diffusion surface 64 protrudes most from the main surface of the light diffusion substrate 60. The interval between.

  In the present embodiment, since an image is formed by the microlens array base material 50 and the light diffusion base material 60 as the intermediate screen 40, light is more effectively used than when a simple screen is used to form an image. Can be transmitted, and the luminance can be increased. In addition, since sufficient luminance can be obtained with a small amount of light, it is possible to save power by suppressing the output of each laser light source and the like.

In addition, as the light-diffusion base material 60, it is preferable that diffusion angle (theta) _D is 5 degrees or more and 6 degrees or less. When the microlens array substrate 50 and the light diffusion substrate 60 are used in combination like the intermediate screen 40 according to the present embodiment, the anisotropic diffusion property (horizontal direction and vertical direction) of the microlens array substrate 50 is used. It is desirable to combine with a light diffusing substrate 60 having a small diffusion angle (in combination with a light diffusing substrate having a large diffusion angle), in order to maintain a property that the diffusion profile is different). Because the nature of becomes dominant and approaches the isotropic diffusion as a whole). However, since the rainbow pattern caused by diffracted light does not disappear when the diffusion angle of the light diffusion base material 60 is 5 ° or less, in the present invention, the diffusion base material 60 has a diffusion angle θ _D of 5 ° or more and 6 ° or less. The thing is adopted.

  Even when the intermediate screen 40 including the microlens array substrate 50 and the light diffusion substrate 60 as described above is used, the same effects as those of the previous embodiment can be obtained.

  Next, another embodiment of the present invention will be described. FIG. 8 is a diagram showing a configuration of an in-aquarium information display device 100 according to another embodiment of the present invention. In the aquarium information display device 100 according to another embodiment of the present invention, a projection unit 85 including a projector unit 83 and an intermediate screen 40 is attached to an XYZ stage (not shown), and the projection unit 85 is movable. Has been. The movement of the projection unit 85 may be electric or manual. According to such a configuration, for example, when the projection unit 85 is moved in the direction indicated by A, the virtual image I ′ in the water tank moves in the direction A ′. According to the aquarium information display device 100 according to another embodiment of the present invention, it is possible to perform more various video display and information display, and to give a greater enjoyment to the viewer who sees the aquarium. it can.

  As described above, according to the information display device in the aquarium according to the present invention, it is possible to display a high-intensity virtual image in the aquarium with a simple configuration such as a projector unit or an intermediate screen. Visibility can be secured, and when used in a dark room, the effect of not unnecessarily illuminating the room can be obtained.

  Next, another embodiment of the present invention will be described. FIG. 9 is a diagram showing a configuration of an aquarium information display device 100 according to another embodiment of the present invention. In the embodiments described so far, the plane including the intermediate screen 40 and the plane including the water tank wall 90 that reflects the image formed on the intermediate screen 40 are parallel.

  In contrast, the aquarium information display device 100 according to another embodiment of the present invention reflects a plane including the intermediate screen 40 and an image formed on the intermediate screen 40 as shown in FIG. It is characterized in that the plane including the aquarium wall 90 is not parallel. The information display device 100 in the aquarium according to this embodiment is characterized in that the intermediate screen 40 is inclined with respect to the aquarium wall 90.

  In the aquarium information display device 100 according to the present embodiment, in this way, by tilting the intermediate screen 40 with respect to the aquarium wall 90, the viewer can easily observe a virtual image. can do.

  FIG. 10 is a diagram for explaining the relationship between the plane including the intermediate screen 40 and the plane including the aquarium wall 90 that reflects the image. The intermediate screen 40 is extracted from the aquarium information display device 100. The relationship between the plane which the water tank wall part 90 makes is shown.

FIG. 10A shows an example of FIG. 9 in which the plane including the intermediate screen 40 is inclined at an angle φ ₁ with respect to the plane including the aquarium wall 90. Further, as shown in FIG. 10B, the water tank in which the plane including the intermediate screen 40 of the information display device 100 in the water tank is inclined at an angle φ ₂ with respect to the plane including the water tank wall 90. The internal information display device 100 may be used.

The angle φ ₁ and the angle φ ₂ are preferably 20 ° to 40 °. Within such an angle range, it is possible to obtain an effect that the viewer can easily observe the virtual image without giving the viewer an impression that the virtual image is inclined.

  In any example of FIG. 10, the plane including the intermediate screen 40 of the aquarium information display device 100 is inclined about the horizontal axis passing through the intermediate screen 40. On the other hand, you may make it incline the plane in which the intermediate screen 40 of the information display apparatus 100 in a tank is contained centering | focusing on the axis | shaft of the perpendicular direction which passes along the intermediate screen 40. FIG.

  According to the aquarium information display device 100 according to another embodiment of the present invention as described above, in addition to the same effects as the aquarium information display device 100 according to the embodiments described so far, a viewer observes a virtual image. The effect that it becomes easy to do can also be enjoyed.

  Next, another embodiment of the present invention will be described. FIG. 11 is a view for explaining the visual effect of the aquarium information display device 100 according to another embodiment of the present invention. In FIG. 11, the in-water tank information display device 100 itself is not shown, and a virtual image I ′ that is visually recognized by a viewer by the in-water tank information display device 100 is shown.

  The present embodiment is characterized in that a structure such as the bubble generating device 110 is disposed between the virtual image I ′ in the water tank and the water tank wall 90. By generating bubbles with such a bubble generation device 110, it is possible to add interest to the visual effect of the information display device 100 in the aquarium. Further, since the bubbles generated from the bubble generation device 110 are transparent, even if the virtual image I ′ behind is visually recognized, the viewer does not feel uncomfortable.

  Further, the structure is not limited to the bubble generating device 110, and may be, for example, a rock, aquatic plant, or an object. This is because the virtual image is visually recognized even if there is a structure between the virtual image I ′ and the reflecting surface of the water tank wall 90. In this case, despite the projection from the front surface of the aquarium wall 90 by the aquarium information display device 100, the virtual image I ′ exists regardless of the aquarium information display device 100 because there is an object in front of the virtual image I ′. The floating feeling of the virtual image I ′ can be enhanced. Further, it is possible to make the viewer feel the illusion that the virtual image I ′ is real.

  According to the aquarium information display device 100 according to another embodiment of the present invention as described above, in addition to the same effects as the aquarium information display device 100 according to the embodiments described so far, the aquarium information display device 100. It is possible to add interest to the visual effect of.

  Next, a projection system 200 using the in-aquarium information display device 100 according to the present invention will be described. FIG. 12 is a diagram showing a configuration of a projection system 200 according to the embodiment of the present invention. In FIG. 12, the detailed configuration of the aquarium information display device 100 is not shown. As an example of use of such a projection system 200, for example, it can be used to make a virtual image I 'visible in a water tank to a visitor who purchases an entrance ticket and enters the facility. A tag is embedded in the admission ticket as described above.

  In FIG. 12, as the personal computer 150, a general-purpose computer having a data reception function, a calculation function, a data storage function, a data transmission function, and the like can be used. In a data storage unit (not shown) of the personal computer 150, projection data projected by the aquarium information display device 100 is stored. The personal computer 150 is communicably connected to the aquarium information display device 100, and can transmit projection data to the aquarium information display device 100.

  A tag reader 125 is disposed in the vicinity of the water tank. The tag reader 125 is configured to be communicable with the personal computer 150. When an admission ticket (tag) 123 that is assumed to be held by a viewer is brought close to the tag reader 125, wireless communication is performed with the admission ticket (tag) 123. The presence of the admission ticket (tag) 123 is detected, and the detected data is transmitted to the personal computer 150.

  When the personal computer 150 receives the detection data of the admission ticket (tag) 123, the personal computer 150 transmits projection data corresponding to the viewer carrying the admission ticket (tag) 123 to the aquarium information display device 100. The aquarium information display device 100 projects a virtual image I ′ based on the transmitted projection data.

  In the claims, the tag reader 125 is referred to as “aquarium wireless communication unit”, and the admission ticket (tag) 123 is referred to as “visual wireless communication unit”. The “communication detection unit” in the claims is built in the tag reader 125.

  Further, an NFC reader (Near Field Communication) can be used as the “water tank wireless communication unit”, and an NFC (Near Field Communication) tag can be used as the “visual wireless communication unit”.

  Further, a beacon receiver can be used as the “aquarium wireless communication unit”, and a beacon transmitter can be used as the “visual radio communication unit”. In this case, Bluetooth LE, iBeacon, or the like can be used as the beacon transmission / reception technology.

  In addition, although it is not a technology using wireless communication, a QR code reader may be used as an alternative to the “aquarium wireless communication unit” and the QR code itself may be used as an alternative to the “visual wireless communication unit”. it can.

  According to the projection system 200 according to the present invention as described above, it can be used for visualizing the virtual image I ′ in the aquarium at a timing desired by the viewer holding the tag.

  Next, a projection system 200 according to another embodiment of the present invention will be described. FIG. 13 is a diagram showing a configuration of a projection system 200 according to another embodiment of the present invention. In FIG. 13, the detailed configuration of the aquarium information display device 100 is not shown.

  As an example of use of such a projection system 200, for example, a viewer has a smartphone 135 in which a tag reader is incorporated and an application that cooperates with the tag reader is installed. Can also be used for visualizing the virtual image I ′ in the water tank.

  In FIG. 13, as the personal computer 150, a general-purpose computer having a data reception function, a calculation function, a data storage function, a data transmission function, and the like can be used. In a data storage unit (not shown) of the personal computer 150, projection data projected by the aquarium information display device 100 is stored. The personal computer 150 is communicably connected to the aquarium information display device 100, and can transmit projection data to the aquarium information display device 100.

  The personal computer 150 is configured to be communicable with a smartphone (tag reader) 135 via the relay point 142 and the communication network 145. Furthermore, the personal computer 150 can communicate data with the server 160 via the communication network 145.

  As the server 160, a general-purpose server having a data reception function, a calculation function, a data storage function, a data transmission function, and the like can be used. In a data storage unit (not shown) of the server 160, projection data based on personal information that can be projected by the in-aquarium information display device 100 is stored. As the content of the projection data based on the personal information, an advertisement or the like is assumed. The server 160 transmits projection data based on personal information to the personal computer 150 in response to a request from the personal computer 150.

  A tag 133 is disposed in the vicinity of the water tank. When a smartphone (tag reader) 135 assumed to be held by a viewer is brought close to the tag 133, the smartphone (tag reader) 135 detects that the tag 133 is detected, and the smartphone (tag reader) 135. The personal information relating to the owner is transmitted to the personal computer 150 via the relay point 142 and the communication network 145.

  The personal computer 150 transmits projection data corresponding to the detected tag 133 to the aquarium information display device 100. The aquarium information display device 100 projects a virtual image I ′ based on the transmitted projection data.

  Further, the personal computer 150 requests projection data based on the personal information to the server 160 based on the personal information related to the owner of the smartphone (tag reader) 135 as necessary. When the personal computer 150 receives the projection data based on the personal information from the server 160, it transmits this to the aquarium information display device 100. The aquarium information display device 100 projects a virtual image I ′ based on the projection data based on the transmitted personal information.

  In the claims, the tag 133 is referred to as a “water tank wireless communication unit”, and the smartphone (tag reader) 135 is referred to as a “viewer wireless communication unit”. The “communication detection unit” in the claims is built in the smartphone (tag reader) 135.

  Further, an NFC (Near Field Communication) tag can be used as the “aquarium wireless communication unit”, and an NFC reader (Near Field Communication) can be used as the “visual wireless communication unit”.

  Further, a beacon transmitter can be used as the “water tank wireless communication unit”, and a beacon receiver can be used as the “viewer wireless communication unit”. In this case, Bluetooth LE, iBeacon, or the like can be used as the beacon transmission / reception technology.

  In addition, although it is not a technique using wireless communication, a QR code can be used as an alternative to the “aquarium wireless communication unit” and a QR code reader can be used as an alternative to the “visual wireless communication unit”. .

  According to the projection system 200 according to the present invention as described above, the virtual image I ′ based on the personal information is visualized in the aquarium as needed at a timing desired by a viewer who holds a smartphone (tag reader). It can be used for things.

  Next, a projection system 200 according to another embodiment of the present invention will be described. FIG. 14 is a diagram showing a configuration of a projection system 200 according to another embodiment of the present invention. In FIG. 14, the detailed configuration of the aquarium information display device 100 is not shown.

  As an example of use of such a projection system 200, for example, it can be used for visualizing a virtual image I 'in a water tank for a viewer approaching the water tank.

  In FIG. 14, as the personal computer 150, a general-purpose computer having a data reception function, a calculation function, a data storage function, a data transmission function, and the like can be used. In a data storage unit (not shown) of the personal computer 150, projection data projected by the aquarium information display device 100 is stored. The personal computer 150 is communicably connected to the aquarium information display device 100, and can transmit projection data to the aquarium information display device 100.

  A sensor 170 that detects the presence or absence of a person is disposed in the vicinity of the water tank. As the sensor 170, a human sensor using infrared rays or a sensor for detecting the weight of a person can be used. Further, the sensor 170 may be configured such that the presence or absence of a person is determined by a viewer pressing a button.

  The sensor 170 is configured to be able to communicate with the personal computer 150. Here, when the sensor 170 detects the presence of a person, the detection data is transmitted to the personal computer 150.

  When the personal computer 150 receives human detection data, the personal computer 150 transmits the projection data to the aquarium information display device 100. The aquarium information display device 100 projects a virtual image I ′ based on the transmitted projection data.

  According to the projection system 200 according to the present invention as described above, it can be used for visualizing the virtual image I ′ in the water tank to a viewer near the water tank.

  The projection data projected by the aquarium information display device 100 itself or the projection system 200 may be still image data or moving image data.

  Still image data may be any of photos, characters, and illustrations (including handwriting), and moving image data may be any of a live-action movie, a character movie, or an illustration movie, or two or more of these. It may be projection data configured in combination.

  In the aquarium information display device 100, if the peripheral portion of the projected image is black, the viewer is not conscious of the projection range or the contour of the image, so that the floating feeling of the image can be enhanced, or the image is You can have the illusion of being real.

  In addition, among the laser scanning method, the LCOS method, and the DLP method as the drawing method of the aquarium information display device 100, the laser scanning method has the highest contrast (that is, black is displayed blacker than other methods, Since the reflected light at the aquarium wall 90 is less), the effect of enhancing the floating feeling of the image or making the illusion that the image is real can be obtained. The information can be most expected for the laser scanning information display apparatus 100 in the water tank.

  It is also possible to keep living things in the aquarium. In this case, since the light emitted from the aquarium information display device 100 to the living thing is scattered light from the intermediate screen 40, compared to the irradiation method in which the projection light of the projector such as project mapping is irradiated as it is to the living thing. The stress given can be reduced.

  Next, a method for obtaining a microlens array having a larger area will be described. FIG. 15 is a conceptual diagram of tiling of the microlens array substrate 50. FIG. 15 shows the thickness of the microlens array substrate 50. The microlens array substrate 50 (see FIG. 2) has a microlens array 54 and a microlens non-formation region 57 around it.

  By tiling the microlens array substrate 50 as described above so that the microlens array 54 and the microlens non-formation region 57 overlap each other, the area of the microlens array can be increased. . At that time, as shown in FIG. 15, tiling may be performed so that a step is generated.

  Next, a suitable value for the numerical aperture of the microlens array substrate 50 will be examined. FIG. 16 is a diagram for explaining the calculation conditions for the numerical aperture of the microlens array substrate 50. FIG. 16 is a view of the thickness of the microlens array substrate 50. In FIG. 16, W indicates the width (or height) of the microlens array 54, and is the minimum distance from the microlens array substrate 50 to the range visually recognized by the viewer. Θ ′ is an angle that is ½ of the range in which light diffuses.

  This θ ′ is substantially equal to the diffusion angle θ defined as the full width at half maximum (FWHM) in relation to FIG. That is, since θ≈θ ′, hereinafter, the notation is unified to θ.

  Considering that the medium is air, the following expression (1) is established between θ and the numerical aperture NA.

  The viewer sees in the shaded area. At this time, the condition that the luminance of the virtual image is uniform from end to end is to satisfy Expression (2).

  From equations (1) and (2), it can be seen that the equation (3) should be used as the minimum numerical aperture NA.

  From the above, when the microlens array substrate 50 satisfying the formula (3) is used as the numerical aperture NA, a suitable in-water information display device 100 can be configured.

  Table 1 shows the minimum value of the numerical aperture NA at the visual distance D and the size W of the virtual image when facing the virtual image.

DESCRIPTION OF SYMBOLS 10 ... Projection part 11 ... 1st light source 12 ... 2nd light source 13 ... 3rd light source 21 ... 1st dichroic prism 22 ... 2nd dichroic prism 26 ... condensing lens 30 ... Projection mirror (scanning section)
35 ... Collimator lens 40 ... Intermediate screen 50 ... Micro lens array substrate 51 ... First main surface 52 ... Second main surface 53 ... Micro lens 54 ... Micro lens array 55 ... smooth surface 57 ... microlens non-formation region 60 ... light diffusion base material 61 ... first main surface 62 ... second main surface 64 ... light diffusion surface 65 ... Smooth surface 70 ... micro lens array / light diffusion base material 71 ... first main surface 72 ... second main surface 73 ... micro lens 74 ... micro lens array 75 ... light diffusion surface 83 ... Projector unit 85 ... Projection unit 90 ... Water tank wall (transparent body)
DESCRIPTION OF SYMBOLS 100 ... Water tank information display apparatus 110 ... Bubble generator 123 ... Admission ticket (tag)
125 ... Tag reader 133 ... Tag 135 ... Smartphone (tag reader)
142 ... Relay point 145 ... Communication network 150 ... Personal computer (information processing device)
160 ... Server (information processing device)
170 ... sensor 200 ... projection system

Claims (13)

An information display device in the aquarium for visualizing the display as a virtual image in the aquarium, from the visual region of the viewer assumed in advance,
A projector unit for projecting an image;
An intermediate screen for forming an image projected by the projector unit,
An aquarium information display device for displaying an image formed on the intermediate screen by reflecting the image on a wall of the aquarium. The intermediate screen is
2. A microlens array substrate having two main surfaces, wherein a microlens array comprising a plurality of microlenses is provided on one main surface, and the other main surface is a smooth surface. The information display apparatus in the water tank described in 1. The intermediate screen is
A microlens array / light diffusing substrate having two main surfaces, a microlens array comprising a plurality of microlenses on one main surface and the other main surface being a light diffusion surface The aquarium information display device according to claim 1. The intermediate screen is
A microlens array substrate having two main surfaces, a microlens array comprising a plurality of microlenses on one main surface, and the other main surface being a smooth surface;
A light diffusing substrate having two main surfaces, wherein one main surface is provided with a light diffusion surface, and the other main surface is a smooth surface;
Consists of
The main surface of the microlens array substrate on which the microlens array is provided and the main surface of the light diffusion substrate on which the light diffusion surface is provided are arranged to face each other. The information display apparatus in the water tank described in 1. The projector unit is
A laser light source for generating laser light;
5. The aquarium information display device according to claim 1, further comprising: a scanning unit configured to scan the intermediate screen with the laser light. The projector unit is
A light source that generates light;
5. The aquarium information display device according to claim 1, further comprising: an LCOS element that reflects the light to the intermediate screen. 6. The projector unit is
A light source that generates light;
The aquarium information display device according to any one of claims 1 to 4, further comprising: a DMD element that reflects the light to the intermediate screen. The in-water tank information display device according to any one of claims 1 to 7, wherein the projector unit and the intermediate screen are attached to a movable stage. A plane including the intermediate screen;
The in-aquarium information display device according to any one of claims 1 to 8, wherein a plane including the aquarium wall portion is not parallel to the plane. 10. The aquarium information display device according to claim 1, wherein a structure is disposed between the virtual image in the aquarium and the aquarium wall. 11. The in-water information display device according to claim 10, wherein the structure is a bubble generating device. The aquarium information display device according to any one of claims 1 to 11,
A viewer wireless communication unit possessed by the viewer;
An aquarium wireless communication unit disposed in the vicinity of the aquarium;
A communication detection unit for detecting communication between the viewer wireless communication unit and the aquarium wireless communication unit;
An information processing device for storing projection data to be viewed as a virtual image by a viewer,
When the communication detection unit detects communication between the viewer wireless communication unit and the aquarium wireless communication unit,
The projection system, wherein the information processing device transmits the projection data to the information display device in the aquarium. The aquarium information display device according to any one of claims 1 to 11,
A sensor unit that is arranged in the vicinity of the water tank and detects the presence or absence of a viewer,
An information processing device for storing projection data to be viewed as a virtual image by a viewer,
When the sensor unit detects the presence of a viewer, the information processing apparatus transmits the projection data to the information display apparatus in the aquarium.

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