JP2005295326A - Image display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image display device capable of forming an image having a higher stereoscopic effect and presence than ever before.
An image display device 100 of the present invention has a display body 1 having a display surface for displaying an image.
10 and a rotation driving means for rotating the display body 110, a plurality of display surfaces 110 </ b> P, 110 </ b> S, 110 that face different orientations on the outer surface of the display body 110.
T, 110U, 110V are provided, and the rotation axis 110X of the display body 110 is provided on a plurality of display surfaces.
Display planes 110P and 110S, 110T, 1 having different normal vector angle differences from each other
10U and 110V are included.
[Selection] Figure 1

Description

The present invention relates to an image display device, and more particularly to a structure of an image display device configured to allow an image to be observed while a display body having a display surface is rotated.

Conventionally, a rotating display system configured to display an image using a visual afterimage effect by switching an image according to a rotation angle of the display surface while the display surface rotates at high speed has been known. (For example, see Non-Patent Document 1 below).

In this rotating display system, as shown in FIG. 6, in an imaging system 20, an object is imaged by four small cameras 21 arranged around it, and the captured image is image synthesizer 2.
2 and then sent to the control PC 30 for predetermined image processing. Thereafter, a plurality of display images corresponding to a plurality of display orientations are formed based on the composite image subjected to the image processing, and each of these display images is sequentially sent to the image display device 10 shown in FIG. A display image is displayed on the display surface 11G in accordance with the rotation angle of the display body 11 that rotates at high speed around the rotation axis 11X.

On the other hand, it is configured to display a stereoscopic image using visual afterimage effect by sequentially projecting a cross-sectional image of an object on the screen from the image projection device while performing volume scanning of the image projection device and the screen at high speed. A stereoscopic image display device is also known (see, for example, Patent Document 1 below).
Hiroyuki Maeda and three others, "Prototype and evaluation of an all-around display system for a real space video avatar" Proceedings of the 8th Annual Conference of the Virtual Reality Society of Japan p. 115-118 (September 2003) JP 2001-197524 A

By the way, in the above rotating display system, display is performed while rotating the display surface, but since the display surface is configured in parallel with the rotation axis and in a planar shape, it is difficult to obtain a sense of depth of the image. There was a problem that the three-dimensional effect and the sense of reality were insufficient.

On the other hand, the image display device using the screen is configured to display a stereoscopic image by volume scanning the screen, but the screen is rotated in the same manner as the image display device 10 shown in FIG. In this case, the display surface is parallel to the rotation axis and is formed in a planar shape as described above. Moreover, since the cross-sectional image of the object must be processed and projected in a complicated manner according to the volume scanning mode (for example, the rotation angle) of the screen, there is a problem that the processing of the projected image becomes complicated. Furthermore, in the method of projecting such a cross-sectional image,
Since the visually recognized image becomes a perspective image of the object, there is a problem that it is difficult to improve the clarity of the image.

Accordingly, the present invention solves the above-described problems, and an object of the present invention is to provide an image display apparatus capable of forming an image having a higher stereoscopic effect and realism than before. Another object of the present invention is to provide an image display device that can display a stereoscopic image that is clearer than the conventional image processing and that requires simple image processing.

An image display device of the present invention is an image display device having a display body having a display surface for displaying an image and rotation driving means for rotating the display body. A plurality of display surfaces, and the plurality of display surfaces include display surfaces (that is, two or more display surfaces) having different normal vector angle differences with respect to the rotation axis of the display body. And

According to the present invention, the display surfaces having different normal vector angle differences with respect to the rotation axis of the display body are provided, in other words, the surface orientation of a certain display surface among the plurality of display surfaces, and the like. Since the surface orientation of the display surface has a different angle difference with respect to the rotation axis, when the display body is rotated around the rotation axis and a predetermined image is displayed on the display surface, the display surface is rotated around the rotation axis. Since the depth of the image position in the radial direction can be increased, it is possible to enhance the stereoscopic effect and the realistic sensation of the image viewed from an oblique direction with respect to the rotation axis. In addition, since it is sufficient to display an image corresponding to the surface orientation of each display surface for a plurality of display surfaces, a cross-sectional image is displayed according to the position and orientation of the display surface as in the past. This eliminates the need for complicated image processing and improves image clarity.

Here, the normal vector is a vector indicating the surface orientation of the display surface. For example, if the display surface is a flat surface, the normal vector is a vector having a direction orthogonal to the display surface. Further, when the display surface is a curved surface, the above normal vector has the direction of the sum vector of the normal vectors for all points on the display surface.

In the present invention, it is preferable that a display surface separated from the rotation axis is included in the plurality of display surfaces. According to this, since the display surface separated from the rotation axis rotates (revolves) the position separated from the rotation axis by the rotation of the display body, the predetermined image is displayed on the display surface by the image. Since the three-dimensional shape can be easily expressed, it is possible to further enhance the three-dimensional effect and the realism of the image.

In the present invention, it is preferable that the display body has a polyhedral shape, and the plurality of display surfaces are respectively configured on a plurality of surfaces constituting the polyhedral shape. According to this, since the display surface is configured on each of the plurality of surfaces constituting the polyhedron shape of the display body, the three-dimensional shape can be easily expressed by the plurality of display surfaces. The feeling can be further enhanced. In this case, the display surfaces do not have to be formed on all surfaces of the polyhedron shape, and the display surfaces may be formed on at least a plurality of surfaces constituting the polyhedron shape. For example, display surfaces may not be formed on five remaining surfaces, and display surfaces may be formed on the other one of six surfaces constituting a hexahedron.

In the present invention, the display body has a prismatic shape with the rotation axis as an axis, and the display surfaces are formed on end surfaces in the extension direction of the rotation axis of the prismatic shape as the plurality of display surfaces, It is preferable to have a display surface formed on a side surface of a prismatic shape. According to this, since the display surface is formed not only on the prismatic side surface of the display body but also on the end surface in the extending direction of the rotation axis, the depth is determined by the image displayed on the display surface on the end surface. An image having a feeling can be formed.

In this invention, it is preferable that the said rotating shaft is comprised so that the vertex or ridgeline of the said polyhedral shape may be passed. According to this, it can prevent that the visual field with respect to a display surface is restrict | limited by the support member of a display body, or a shaft support structure because a rotating shaft passes the vertex or ridgeline of a polyhedron shape. Here, since the rotation axis passes through two or more points on the outer surface of the display body, the rotation axis passes through the vertex or ridge line of the polyhedron shape at one point, but the rotation axis passes through the polyhedron at other points. You may be comprised so that it may pass through parts other than the vertex or ridgeline of a shape. However, the other points at this time are preferably arranged in a portion where the display surface is not provided. In addition, it is desirable that all points through which the rotation axis passes on the outer surface of the display body are apexes or ridge lines of the polyhedral shape.

In the present invention, the display body has a three-dimensional rotating body shape, and the plurality of display surfaces are the 3
You may each comprise on the several area | region formed by dividing the outer surface of a three-dimensional rotary body shape. In this case, the three-dimensional rotating body shape is preferably a shape having the rotation axis as a rotation axis. According to this, since the outer surface position does not change temporally when the display body is rotated, a stable image with little blur can be displayed.

  Next, an embodiment of an image display device according to the present invention will be described with reference to the accompanying drawings.

[First embodiment]
FIG. 1 is a schematic perspective view showing the overall configuration of an image display apparatus 100 according to the first embodiment of the present invention. The image display device 100 includes a display body 110, a support stand 120 that supports the display body 110, and an image projection unit 130.

The display body 110 has a polyhedral shape, and has a plurality of display surfaces 110P, 110S, 1 on its outer surface.
10T, 110U, and 110V are provided, respectively. Each display surface is formed on each surface of the polyhedral shape. The display body 110 is connected to a support 120 via a support shaft 114.
It is connected and fixed to the rotating plate 121.

In the support base 120, the rotating plate 121 is configured to be rotatable, and is configured to be rotationally driven by a rotation driving means (not shown) (such as an electric motor or a train wheel) disposed in the support base 120. Therefore, when the rotating plate 121 rotates, the display 110 is rotated about the rotation axis 11.
It is designed to rotate around 0X.

Specifically, the display body 110 has a rectangular parallelepiped (cubic) shape centering on the rotation axis 110X, and a display surface 110P is formed on the upper surface that is an end surface in the extension direction of the rotation axis. Display surfaces 110S, 110T, 110U, 110 on a plurality of side surfaces around the rotation axis, respectively.
V is formed. In the present embodiment, each display surface is a flat surface.

In the present embodiment, the display surface 110P has a normal vector component in the extending direction of the rotation axis 110X. That is, the normal vector of the display surface 110P has a vector component in the extending direction of the rotation axis 110X. In particular, the display surface 110P that is a flat surface is not parallel to the rotation axis 110X. More specifically, the display surface 110P is a surface orthogonal to the rotation axis 110X, and the rotation axis 110X passes through the center portion thereof. Therefore, the normal line of the display surface 110P coincides with the rotation axis 110X.

On the other hand, the display surfaces 110S, 110T, 110U, and 110V are all separated from the rotation axis 110X. Further, the display surfaces 110S, 110T, 110U, and 110V are all surfaces parallel to the rotation axis 110X, and the normal vector thereof does not have a component in the extending direction of the rotation axis 110X. Therefore, the angular difference between the normal vector of the display surface 110P and the rotation axis 110X (
0 degree in the illustrated example is different from the angular difference (90 degrees in the illustrated example) between the normal vector of the display surfaces 110S, 110T, 110U, and 110V and the rotation axis 110X.

In the present embodiment, display devices corresponding to the respective display surfaces are built in the display body 110. These display devices are preferably electro-optical devices, for example. A thin display is desirable as the electro-optical display device. Specifically, a liquid crystal display (LCD)
: Liquid Crystal Display), Plasma display device (PDP: Plasma Display)
Panel), electroluminescence display device (Electroluminescence), organic electroluminescence display device (Organic Electroluminescence), electrophoretic display display device, display device using electron-emitting devices (Field Emission Display and Surface-Conduc)
various types of display devices such as electron-emitter display) can be used.

In the present embodiment, while rotating the display body 110 around the rotation axis 110X,
By performing appropriate display on each of the display surfaces 110P, 110S, 110T, 110U, and 110V, it is possible to make a predetermined image visible to an observer around. For example, assuming that there is an observer in front of FIG. 1, at the timing shown in the drawing, that is, when the observer is at an angular position facing the display surfaces 110P, 110S, 110T, these display surfaces 110P.
, 110S, and 110T, it is possible to form an image that looks like a three-dimensional object is present inside the display 110 due to a visual afterimage effect.

At this time, after displaying the images on the display surfaces 110P, 110S, and 110T, the images are displayed on the display surfaces 110P, 110T, and 110U, and then the display surfaces 110P, 110T are displayed.
An image is displayed on both U and 110V, and further on the display surfaces 110P, 110V, and 110S. Thus, each time the display 110 rotates 90 degrees around the rotation axis 110X, the observer displays an image. You may comprise so that it may visually recognize. Of course, the display interval of the image is arbitrary. For example, the number of times of display during one rotation of the display body 110 may be 1 to 4 times, or several times during the rotation of the display body 110 a plurality of times. You may operate | move in the aspect of performing a display.

In the present embodiment, the angle difference between the normal vector of the display surface 110P and the rotation axis 110X is different from the angle difference between the normal vector of the display surfaces 110S, 110T, 110U, and 110V and the rotation axis 110X. Since the depth of the image position seen in the radial direction can be obtained, it is possible to enhance the sense of depth of the image particularly when the display body 110 is viewed from obliquely above. Further, the display surfaces 110S, 110T, 1 separated from the rotation axis 110X.
Since 10U and 110V are provided, the volume of a stereoscopic image can be expressed by these display surfaces. Therefore, the observer can visually recognize an image having a stereoscopic effect and a sense of reality more than before.

In the present embodiment, since the support stand 120 is a visual obstacle, the display body 1
Although no display surface is provided on the bottom surface of 10, if the bottom surface is configured to be visible from the outside, a display surface can also be provided on the bottom surface. Further, in this embodiment, the display body 110 is cantilevered on the bottom surface side, but although the field of view is limited by a support member, a shaft support structure, etc., by providing a support structure on the top surface side, You may comprise so that a display body may be supported in a holding state.

[Second Embodiment]
Next, an image display apparatus 200 according to the second embodiment of the present invention will be described with reference to FIG. In this embodiment, the display body 210 is configured to rotate about the rotation axis 210X by the same rotational driving means as in the first embodiment. The display body 210 of this embodiment is
It has the same polyhedral shape as the first embodiment (a rectangular parallelepiped (cubic) shape that is also a polygonal column shape),
It is the same as the display body 110 of the first embodiment in that a plurality of display surfaces 210P, 210S, 210T, 210U, and 210V are provided on each surface.

The present embodiment is different from the first embodiment in that the display body 210 does not display on the display surface itself, but image projection means 230A, 230B, 230C, 230D, and 23 arranged outside.
The point is that the image is projected on each display surface by 0E. That is,
Each display surface has a screen function for displaying an image projected by the image projection means.

In the present embodiment, although the method for displaying an image on the display surface is different from that in the first embodiment, the image viewed from the observer can be configured in the same manner as in the first embodiment. Rotating shaft 210X
2, for example, when it is assumed that there is an observer in front of FIG. 2, the timing shown in FIG. 2, that is, when the observer faces the display surfaces 210 </ b> P, 210 </ b> S, 210 </ b> T. If a predetermined image is projected on the respective display surfaces 210P, 210S, and 210T by the image projection means 230A, 230B, and 230C, the observer can visually recognize the same image as in the first embodiment. At this time, the display interval of the image is also arbitrary as in the first embodiment.

Also in the present embodiment, the display surface 2 is formed on the bottom surface of the display body 210 as in the first embodiment.
10 W may be formed. In this case, image projection means for the display surface 210W can be separately provided. In FIG. 2, the support structure of the display body 210 is omitted, but it may have either a cantilever support or a both-end support structure as in the first embodiment.

In the present embodiment, a separate image projecting unit is provided for each display surface. However, it is also possible to project an image on a plurality of display surfaces by a single image projecting unit. For example,
By projecting an image from the front side of the drawing onto the display surfaces 210P, 210S, and 210T shown in FIG. 2, the images can be displayed on the plurality of display surfaces. However, since the plurality of display surfaces have different plane orientations (or normal vectors) with respect to a predetermined projection direction,
It is preferable to adjust the projected image so that the image is not distorted.

[Third Embodiment]
Next, an image display apparatus 300 according to a third embodiment of the present invention will be described with reference to FIG. In this embodiment, the display body 310 is connected to a rotating plate 321 provided on the support base 320 via a support shaft 314, and the display body 310 is centered on the rotation axis 310 </ b> X by the rotation driving means built in the support base 320. It is the same as that of 1st Embodiment by the point comprised so that it may rotate.

This embodiment is different from the first embodiment in that the rotation axis 310X of the display body 310 is set so as to pass through the apex of the display body 310 having a polyhedral shape. Display 310
Has a polyhedron shape (more specifically, a rectangular parallelepiped (cube) shape which is also a polygonal column shape) and has six apexes. The rotation axis 310X is configured to pass through two vertices arranged opposite to each other among the vertices.

FIG. 4 is a schematic perspective view (a) to (f) sequentially illustrating postures when the image display apparatus 300 of the above embodiment is operated and the display body 310 is rotated. Here, a plurality of display surfaces 310G, 310H, 310I, 310J, 310K, and 310L are provided on the outer surface of the display body 310. These display surfaces are respectively formed on a plurality of surfaces of the polyhedral display body 310. 4A to 4F show the postures when the display 310 is rotated around the rotation axis 310X by 60 degrees.

In the present embodiment, the display surfaces 310G, 310H, 310I, 310J, 310K,
310L is a surface having a normal vector component in the extending direction of the rotation axis 310X. However, the normal vectors of the display surfaces 310G, 310I, and 310K and the rotation axis 310X
Is different from the angle difference between the normal vector of the display surfaces 310H, 310J, and 310L and the rotation axis 310X (45 degrees in the illustrated example).

Here, when it is assumed that there is an observer in front of FIG. 4, the display 310 is displayed in FIGS.
), The image is displayed on the three display surfaces facing the front at the time of being in at least one of the postures so that the viewer can visually recognize an image having a stereoscopic effect or a sense of presence. Here, since the position and orientation of the display surface visually recognized by the observer are the same at intervals of 120 degrees, it is also possible to perform display at intervals of 120 degrees. In addition, since the position and orientation of the display surface visually recognized by the observer change at intervals of 60 degrees, display in different modes is performed by superimposing the display surfaces in different display surface states at different positions and orientations. An image can also be formed. This can further enhance the stereoscopic effect of the image.

In the above embodiment, since the rotation shaft 310X is configured to pass through the apex of the polyhedron shape, when a support member and a shaft support structure (not shown) are provided on the display body 310, these support members and the shaft support structure are provided. This prevents a part of the image on the display surface from being hidden.
Here, the rotation shaft 310X may be configured to pass through a polyhedral ridgeline. Also in this case, it is possible to prevent a part of the image on the display surface from being hidden by the support member or the shaft support structure. Further, the rotation axis 310 normally passes through two points on the outer surface of the display 310, but it is preferable that both of the two points are on the vertex or ridge line as in the present embodiment. One of the points may be on the vertex or ridge line, and the other point may be on a portion other than the vertex or ridge line. In this case, it is preferable that a display surface is not provided in a portion where the other one point exists.

Note that the present embodiment can also be configured to display by projecting an image on a display surface by providing an image projecting unit as in the second embodiment. In this case, the specific configuration is exactly the same as that described in the second embodiment.

[Fourth Embodiment]
Next, an image display device 400 according to a fourth embodiment of the present invention will be described with reference to FIG. This embodiment has a display body 410 shown in FIG. Here, the point that the display body 410 is configured to rotate about the rotation axis 410X is the same as that of each of the above embodiments. In FIG. 5, the rotation driving means is omitted.

The display body 410 has a spherical shape, and a plurality of display surfaces 410P and 410Q are formed on the outer surface thereof. In the figure, display surfaces 410P and 410Q are part of a spherical surface divided by a two-dot chain line in the drawing. In the present embodiment, the display surfaces 410P and 410Q may be display screens configured by a display device as in the first embodiment, or by image projection means provided separately as in the second embodiment. It may be a screen surface on which an image is projected.

In the present embodiment, the display surfaces 410P and 410Q are surfaces having a normal vector component in the extension direction of the rotation axis 410X. The display surfaces 410P and 410Q are curved surfaces, and the normal vector at this time has the direction of the sum vector of the normal vectors at all points on the display surfaces 410P and 410Q in this specification. To do. Here, display surface 4
10P is a plurality of display surfaces on one side (upper side in the drawing) along the extending direction of the rotation shaft 410X, and the display surface 410Q is on the other side (lower side in the drawing) along the extending direction of the rotation shaft 410X. It is a plurality of display surfaces.

In the present embodiment, the angle difference between the normal vector P of the display surface 410P and the rotation axis 410X (45 degrees in the illustrated example) is the angle difference between the normal vector Q of the display surface 410Q and the rotation axis 410X (in the illustrated example). 135 degrees). Therefore, by displaying images on these display surfaces 410P and 410Q, the depth of the image position can be given in the radial direction of the rotation axis 410X, so that observation is performed particularly from an oblique line of sight with respect to the rotation axis 410X. In this case, an image with a three-dimensional effect or a sense of reality can be visually recognized. In addition, the display surfaces 410P and 410Q have a rotation axis 410.
Since it is provided at a position away from X, it is possible to give a sense of volume to the display, so that it is possible to further enhance the stereoscopic effect and presence of the image. That is, with respect to an observer who is in a predetermined orientation with respect to the display body 410, a plurality of display surfaces 410 facing the observer.
By displaying a predetermined image on each of P and 410Q, it is possible to provide an image with a high degree of stereoscopic effect and presence.

In addition, since the display body 410 is configured to have a spherical shape with the rotation axis 410X passing through the center point, the position of the outer surface of the display body 410 does not change with time even if the display body 410 rotates. It is possible to prevent the display image from being shaken due to the change in the outer surface position.

In the present embodiment, the display body 410 has a spherical shape. However, for example, a three-dimensional rotating body shape such as a spheroid (a three-dimensional shape obtained by rotating a predetermined cross-sectional shape around a rotation axis) is used. You may have. Further, the rotation axis 410X passes through the center of the display body 410, and the outer surface position of the display body 410 does not change with time. In the present invention, the rotation axis 410 is the center of the display body 410. You may be comprised so that it may not pass.

In each of the above embodiments, for example, when an observer views the display body from an oblique direction with respect to the rotation axis, the visual field always includes a plurality of displays in which the angular difference between the normal vector and the rotation axis is different from each other. It is comprised so that a surface may be included simultaneously. However, the present invention is not limited to the case where a plurality of display surfaces are formed on the display body in such a manner. For example, when the angle difference between one display surface and the rotation axis is different from the angle difference between the other display surface and the rotation axis, the one display surface is in the viewer's field of view at some point when the display body is rotating. However, at another point in time, another display surface may enter the viewer's field of view, and one display surface may not enter. Even if it is configured in this way, if each display surface is displayed when it enters the viewer's field of view, the display body rotates and the visual afterimage effect causes the same as in the above embodiment. It is because the external appearance is obtained.

1 is a schematic perspective view of an image display device according to a first embodiment of the present invention. The schematic perspective view of the image display apparatus of 2nd Embodiment. The schematic perspective view of the image display apparatus of 3rd Embodiment. The schematic perspective view (a)-(f) which shows the attitude | position change of the display body at the time of operation | movement of 3rd Embodiment. The schematic perspective view of the display body of 4th Embodiment. Explanatory drawing which shows the structure of the image supply system with respect to the conventional image display apparatus. The front perspective view which shows the example of the conventional image display apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100,200,300,400 ... Image display apparatus, 110,210,310,410 ... Display body, 110P, 110S, 110T, 110U, 110V ... Display surface, 110X ... Rotation axis line, 114 ... Support axis, 120 ... Support stand 121 ... Rotating plates, 230A to 230E ... Image projection means

Claims (7)

In an image display device having a display body having a display surface for displaying an image, and rotation driving means for rotating the display body,
A plurality of display surfaces facing different directions are provided on the outer surface of the display body,
The image display device according to claim 1, wherein the plurality of display surfaces include display surfaces having different normal vector angular differences with respect to the rotation axis of the display body. The image display apparatus according to claim 1, wherein the plurality of display surfaces include a display surface separated from the rotation axis. The image display device according to claim 1, wherein the display body has a polyhedron shape, and the plurality of display surfaces are respectively formed on a plurality of surfaces constituting the polyhedron shape. The image display apparatus according to claim 3, wherein the rotation axis is configured to pass a vertex or a ridge line of the polyhedral shape. The display body has a prismatic shape with the rotation axis as an axis, the display surfaces being formed on end surfaces in the extension direction of the rotation axis of the prismatic shape as the plurality of display surfaces, and the side surfaces of the prismatic shape. The image display apparatus according to claim 3, further comprising a display surface formed on the display surface. The display body has a three-dimensional rotating body shape, and the plurality of display surfaces are respectively formed on a plurality of regions obtained by partitioning an outer surface of the three-dimensional rotating body shape. 1 or 2
The image display device described in 1. The image display device according to claim 6, wherein the three-dimensional rotating body shape is a shape having the rotation axis as a rotation axis.

Images