JP2019045739A - Projection device - Google Patents

Abstract

To achieve downsizing in a depth direction of a projection device for displaying a background on a foreground.SOLUTION: The projection device includes: a projecting half mirror 1; a display device 2 for foreground that is disposed on the opposite side to the projection of the half mirror 1 and displays subject video capturing a subject; and two display devices 3a and 3b for background that are disposed on both sides of the half mirror 1 perpendicularly to the display device 2, and display the divided background video obtained by dividing the background video with respect to the subject video into right and left, respectively. The divided background video displayed on the two display devices 3a and 3b for background is reflected on the half mirror 1, and a virtual image of the background video is displayed on the depth side of the subject video displayed on the display device 2 for foreground.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a technique for projecting an image.

  In the field of remote communication and entertainment, there is a demand for a method of presenting people and virtual characters as if they were present on the spot. As such a method, there has been proposed a projector which reflects a display surface of a display device by a half mirror and displays a virtual image of an object in the display surface in the air.

  FIG. 9A is a top view showing a conventional projection apparatus. In the conventional projection apparatus, as shown in FIG. 9A, the flat half mirror 1 is disposed at an angle of about 45 ° as viewed from the left viewer, and one side of the half mirror 1 is for foreground. The display device 2 is arranged. Thus, the virtual image of the subject displayed on the display surface of the foreground display device 2 can be projected to the back of the half mirror 1.

  Further, the conventional projection device further arranges the background display device 3 at the back of the position where the virtual image of the subject is projected. By displaying the shadow of the subject, a predetermined texture, and the like on the background display device 3, it is possible to display the subject as a foreground and the shadow of the subject as a background. Thus, for example, as shown in FIG. 9B, it is possible to superimpose and display an image of the shadow of the subject shown by a solid line behind the virtual image of the subject shown by a broken line. Since the background is displayed on the foreground, the foreground can be given a sense of depth to emphasize the presence of the foreground.

Takamichi Hashiguchi, 5 others, "Proposal of a small multi-layered aerial image projector that can be used in smartphones", Information Processing Society of Japan, Interaction, March 4, 2016

  However, the conventional projection device arranges the foreground display device 2 on one side of the half mirror 1 and places the background display device 3 behind the position where the virtual image of the object is projected. A depth width W which is the sum of the width of the display surface and the distance width from the virtual image projection position to the background display device 3 is necessary, and it is difficult to miniaturize the projection device in the depth direction.

  The present invention has been made in view of the above circumstances, and has an object of realizing a reduction in the depth direction of the projection apparatus in a projection apparatus that displays a background together with the foreground.

  In order to solve the above problems, a projection device according to a first aspect of the present invention includes a convex half mirror, and a foreground display device which is disposed on the opposite convex side of the half mirror and displays an object image obtained by photographing an object. And two background display devices respectively disposed vertically on the foreground display device on both sides of the half mirror and respectively display divided background images obtained by dividing the background image with respect to the subject image on the left and right. Each split background image displayed on each of two background display devices is reflected on the half mirror, and a virtual image of the background image is displayed on the far side of the subject image displayed on the foreground display device. It features.

  A projection device according to claim 2 is the projection device according to claim 1, wherein the half mirror has a shape in which a convex portion of a convex shape is curved, and the display device for background is a curved portion of the half mirror. The ratio of the size in the horizontal axis direction of the divided background image of the part to be reflected is changed according to the curvature of the curved part.

  The projection apparatus according to claim 3 is the projection apparatus according to claim 1 or 2, wherein the half mirror is formed by bending one flat half mirror, and the transmittance of the bent curved part is a flat part. The background display device is configured to change the luminance of the divided background image of the portion reflected by the curved portion of the half mirror in accordance with the transmittance of the curved portion. .

  A projection device according to a fourth aspect of the present invention is the projection device according to any one of the first to third aspects, wherein the projection device is disposed on a floor surface between the half mirror and the background display device. It further comprises a boundary suppressor having the same texture as the texture of the floor between the display device and the display device.

  A projection device according to a fifth aspect of the present invention is the projection device according to any one of the first to fourth aspects, wherein the projection device is disposed on a floor surface between the half mirror and the background display device and displayed on the foreground display device. And a boundary suppressor having a texture associated with the subject.

  According to the present invention, downsizing of the projection apparatus in the depth direction can be realized.

FIG. 1 is a top view showing a projection device according to a first embodiment. FIG. 1 is a top view showing a projection device according to a first embodiment. It is a top view which shows the projection apparatus which concerns on 2nd Embodiment. It is a top view which shows the projection apparatus which concerns on 3rd Embodiment. It is a top view showing a projection device concerning a 4th embodiment. It is a top view which shows the projector which concerns on 5th Embodiment. It is a top view which shows the projection apparatus which concerns on 6th Embodiment. It is a top view showing a projection device concerning a 7th embodiment. It is a top view which shows the conventional projection apparatus.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

First Embodiment
FIG. 1 is a top view showing a projection apparatus according to the first embodiment. The projection apparatus arranges the convex half mirror 1 so that the convex part is positioned on the observer side as viewed from the viewer on the left side, and arranges the foreground display device 2 on the non-convex side of the half mirror 1 Then, two background display devices 3a and 3b are disposed vertically on the foreground display device 2 on both sides of the half mirror 1, respectively.

  Then, the background image is divided into right and left by an image processing device (not shown), and each divided background image is divided and displayed by two background display devices 3a and 3b. Thereby, each divided background image divided into right and left is respectively reflected by two plane parts of the half mirror 1 (two plane parts excluding the convex part from the half mirror 1), and the original of the combined left and right backgrounds The virtual image of the background is projected to the back of the subject displayed on the foreground display device 2.

  That is, in the present embodiment, the foreground (subject) is displayed on the foreground display device 2 located at the back of the half mirror 1 to make the observer look directly, and the background (shadow of the subject, predetermined texture, etc.) It is divided and reflected by the convex half mirror 1 to display the virtual image of the background behind the foreground. Therefore, it is possible to reduce the physical distance width from the virtual image projection position of the subject to the background display device 3 which is required in the conventional projector shown in FIG. Further, since the background display device 3 displays a divided background image smaller in size than the original background image, the small background display device 3 with a smaller display surface can be used. Accordingly, the depth width W of the projection device shown in FIG. 1 can be made extremely small.

  Next, the components constituting the projection device will be described in detail.

  The half mirror 1 has a convex shape when viewed from the top, and has two flat portions divided into two by the convex portion of the convex shape. The half mirror 1 may be formed by preparing two flat half mirrors and bonding one piece to another, or preparing one large half flat mirror to form an in-plane central axis. You may bend and form. Preferably, the relative angle between the two planar portions is approximately 90 °. Further, as shown in FIG. 2, the two plane portions are disposed at an angle of about 45 ° with respect to the two background display devices 3a and 3b. In particular, when the half mirror 1 is bent and formed as shown in FIG. 2, it is preferable to make the joint of the divided virtual image of the left and right background inconspicuous by bending the convex portion 1a smoothly.

  The two background display devices 3a and 3b are disposed in such a manner that their display surfaces face each other on both sides of the half mirror 1, and are communicably connected to the above-described image processing device. Further, the two background display devices 3a and 3b have a function of displaying the left and right divided background images divided by the image processing device. Since the left and right divided background images displayed by the two background display devices 3a and 3b are respectively projected line-symmetrically by the plane portion of the half mirror 1, the display devices 3a and 3b are one background after projection. The background image is displayed in consideration of line symmetry so that the image matches the original background image. As a display method of divided background images in consideration of line symmetry, the existing reverse display function etc. of the display devices 3a and 3b for background may be used, or the image processing device or the display devices 3a and 3b for background may be used. The image may be appropriately adjusted by inverting it.

  In addition, when the half mirror 1 is formed by bending, the bent convex portion 1a has a curved shape, so distortion occurs in the virtual image of the background reflected by the curved portion. Specifically, the curved shape causes the central portion of the virtual image of the background to be projected as if it is laterally extended. In order to prevent this, each of the background display devices 3a and 3b, as shown in FIG. 2, except for the display area 3ab of the display surface corresponding to the flat surface of the half mirror 1, the display area corresponding to the convex portion 1a. A correction in consideration of the curvature of the convex portion 1a is added to the background image of the portion displayed at 3aa. That is, the background display devices 3a and 3b change the ratio of the size in the horizontal axis direction of each divided background image of the portion reflected by the curved portion of the half mirror 1 according to the curvature of the curved portion. . By applying such a correction, it is possible to match the projected background with the original background image.

  The foreground display device 2 is disposed at an angle of approximately 90 ° with the two background display devices 3a and 3b on the back side of the half mirror 1, and has a function of displaying a subject image obtained by photographing a subject. In order to project the virtual image of the background by the background display devices 3a and 3b to the back of the subject which is the foreground, the foreground display device 2 extends from the foreground display device 2 to the plane portion of the half mirror 1 as shown in FIG. Are arranged to be smaller than the distance D1 from the background display devices 3a and 3b to the plane portion of the half mirror 1. That is, by setting D1> D2, the virtual image of the background projected by the two background display devices 3a and 3b can be positioned behind the foreground that is the subject.

  The subject video displayed on the foreground display device 2 may be a video of an observer captured by a camera separately prepared, or may be a video other than the observer. The background image displayed on the background display devices 3a and 3b may be an image of a shadow obtained by simulating the shadow of the viewer with a predetermined texture and color, or may be other than the image of the shadow. For example, landscapes, animals, etc. may be used as a background image.

  As described above, according to the present embodiment, the convex half mirror 1 and the foreground display device 2 disposed on the opposite convex side of the half mirror 1 and displaying a subject image in which the subject is photographed, and the half mirror 1 And two background display devices 3a and 3b arranged vertically on the foreground display device 2 on both sides and respectively displaying divided background images obtained by dividing the background image with respect to the subject image on the left and right, Since each divided background image displayed on each of the display devices 3a and 3b is reflected by the half mirror 1 and a virtual image of the background image is displayed on the back side of the object image displayed on the foreground display device 2, It is possible to reduce the physical distance width from the virtual image projection position of the object to the background display device 3 which is required in the conventional projector shown in FIG. Further, since the background display device 3 displays a divided background image smaller in size than the original background image, the small background display device 3 with a smaller display surface can be used. Accordingly, miniaturization of the projection apparatus in the depth direction can be realized.

  Further, according to the present embodiment, the half mirror 1 has a shape in which the convex portion of the convex shape is curved, and the two background display devices 3a and 3b are reflected by the curved portion of the half mirror 1, respectively. Since the ratio of the size in the horizontal axis direction of the divided background image of the part is changed according to the curvature of the curved part, distortion of the virtual image of the projected background is suppressed, and the administrator of the projection apparatus desires Can be projected in the original size and shape.

Second Embodiment
Next, a second embodiment will be described. In the second embodiment, the object is to make the joint of the virtual image of the background due to the curvature of the convex portion of the half mirror 1 inconspicuous.

  FIG. 3 is a top view showing a projection apparatus according to the second embodiment. The projection apparatus according to the second embodiment is the same as the first embodiment, but the configuration of the convex portion 1a of the half mirror 1 and each of the divided background images displayed by the two background display devices 3a and 3b. The display method is different.

  In order to achieve the above object, in the present embodiment, no reflection portion is provided on the convex portion 1 a of the curved portion of the half mirror 1. For example, the convex portion 1a is covered with a non-reflective member, or is formed of a low reflective member. Alternatively, the transmittance of the convex portion 1a is increased. Specifically, the convex portion 1a is configured by a half mirror with high transmittance, and the flat portion other than the convex portion 1a is configured by a half mirror with low transmittance. Thereby, the joint of the virtual image of the background due to the curvature of the convex portion 1 a of the half mirror 1 can be made inconspicuous.

  Further, the two background display devices 3a and 3b respectively display the divided background images with a brightness gradient (gradation). For example, in accordance with the reflectance or transmittance of the convex portion 1a of the curved portion of the half mirror 1, the divided background image is corrected and displayed so that the luminance gradually increases toward the convex portion 1a. Thereby, the luminance attenuation of the virtual image of the background corresponding to the convex portion 1 a of the half mirror 1 can be reduced, and the seam of the virtual image of the background due to the curvature of the convex portion 1 a can be made less noticeable.

  As described above, according to the present embodiment, the reflective portion is not provided in the convex portion 1a of the curved portion of the half mirror 1, or the transmittance of the convex portion 1a is enhanced, and two display devices for background are provided. 3a and 3b change the luminance of the divided background image of the portion reflected by the convex portion 1a of the curved portion of the half mirror 1 according to the reflectance or transmittance of the curved portion, respectively. The seam of the virtual image of the background due to the curvature of the part can be made inconspicuous.

Third Embodiment
Next, a third embodiment will be described. The third embodiment aims to make the boundary between the foreground display device 3 and the floor surface inconspicuous.

  FIG. 4 is a top view showing a projection apparatus according to the third embodiment. The projection apparatus according to the third embodiment further includes a boundary suppression body 4 in addition to the configuration of the first embodiment.

  The boundary suppressing body 4 is a member for making the boundary between the foreground display device 2 and the floor surface immediately below the foreground display device 2 inconspicuous, and the half mirror 1 and the two background display devices 3a and 3b. And placed on the floor between. For example, as shown in FIG. 4, it is a floor panel 4a and a foot type panel 4b. In addition, floor mats, plates, seals, etc. may be used.

  In order to achieve the above object, in the present embodiment, two methods will be described.

  First, the texture of the boundary suppressor 4 and the texture of the foreground front floor 5 between the half mirror 1 and the foreground display device 2 are matched. That is, the floor panel 4a having the same texture as the texture of the foreground front floor 5 is disposed on the floor between the half mirror 1 and the background display devices 3a and 3b. As a result, since the virtual image 4a 'of the texture of the floor panel 4a is displayed overlapping the texture of the foreground front floor 5, it appears that the texture of the floor continues on the far side of the foreground display device 2, The boundary between the display device 2 and the floor surface can be made inconspicuous. Conversely, the floor panel 4a is disposed on the floor surface between the half mirror 1 and the foreground display device 2, and the texture of the floor panel 4a is displayed on the floor between the half mirror 1 and the background display devices 3a and 3b. It may match the texture of the surface.

  The second relates the texture of the boundary suppressor 4 to the texture of the object displayed on the foreground display device 2. For example, when the subject displayed on the foreground display device 2 is a humanoid, the foot-shaped panel 4b having the same texture as that of the humanoid is a floor between the half mirror 1 and the background display devices 3a and 3b. Arrange on the surface. As a result, the virtual image 4b 'of the foot panel 4b looks like a shadow of a human foot as a subject, and the boundary between the foreground display device 2 and the floor can be made inconspicuous. It can be enhanced.

  In addition, the floor surface texture by the boundary suppression body 4 may be fixedly determined, and may be displayed dynamically. In the case of dynamic display, a display device is added, the display surface is embedded in the floor surface toward the installation side of the half mirror 1, and the floor surface texture is adjusted in the image displayed by the display device. In the second case, it is necessary to consider the position and texture of the subject image displayed on the foreground display device 2. In this case, for example, the added display device is displayed on the foreground display device 2. An image of a subject is acquired, and image analysis is performed to generate and display a foot-form image of a position and texture that matches the subject.

  As described above, according to the present embodiment, since the floor panel 4a having the same texture as the texture of the foreground front floor 5 is disposed on the floor between the half mirror 1 and the background display devices 3a and 3b, the foreground The boundary between the display device 2 and the floor surface can be made inconspicuous.

  Further, according to the present embodiment, the foot type panel 4b corresponding to the shadow of the foot of the human figure displayed on the foreground display device 2 is a floor surface between the half mirror 1 and the background display devices 3a and 3b. As a result, the boundary between the foreground display device 2 and the floor surface can be made inconspicuous, and the presence of the subject can be enhanced.

Fourth Embodiment
Next, a fourth embodiment will be described. The fourth embodiment aims to prevent the viewer from viewing divided background images of the two background display devices 3a and 3b on both sides.

  FIG. 5 is a top view showing a projection apparatus according to the fourth embodiment. The projection device according to the fourth embodiment is configured to further include a pair of polarizing plates 6 a and 6 b and a polarizing plate 7 in addition to the configuration of the first embodiment.

  The pair of polarizing plates 6a and 6b are disposed between the half mirror 1 and the two background display devices 3a and 3b, respectively, and have a function of transmitting light only in the direction (direction A) where the half mirror 1 is positioned. Have. The polarizing plate 7 is disposed between the half mirror 1 and the observer, and has a function of transmitting light only in the direction (direction B) where the observer is positioned.

  For example, a circularly polarizing plate or a linear polarizing plate can be used. When a circularly polarizing plate is used, the light transmitted through the polarizing plates 6 a and 6 b in the direction A is reversed in polarity by the reflection of the half mirror 1, so the light is transmitted through the polarizing plate 7 in the direction B but is reflected by the half mirror 1 No light can not pass through the polarizing plate 7 in the direction B. In the case of using a linear polarizing plate, it is sufficient to use a half mirror transmission wavelength + 1/4 lambda wavelength plate whose polarization is broken when it is reflected by the half mirror 1.

  As described above, according to the present embodiment, the polarizing plates 6a and 6b are disposed between the half mirror 1 and the two background display devices 3a and 3b, respectively, and the polarizing plate is disposed between the half mirror 1 and the observer. Since 7 is arranged, it is possible to prevent the viewer from seeing the divided background image of the two background display devices 3a and 3b on both sides.

Fifth Embodiment
Next, a fifth embodiment will be described. In the fifth embodiment, as in the fourth embodiment, it is an object to prevent the viewer from viewing divided background images of the two background display devices 3a and 3b on both sides.

  FIG. 6 is a top view showing a projection apparatus according to the fifth embodiment. The projector according to the fifth embodiment is configured to further include a pair of viewing angle limiting films 8a and 8b in addition to the configuration of the first embodiment.

  The pair of viewing angle limiting films 8a and 8b are disposed between the half mirror 1 and the two background display devices 3a and 3b, respectively, and have a function of limiting the viewing angle to only about 60.degree. Have. Therefore, the divided background image of the background display devices 3a and 3b can be restricted for the viewer located outside the range of the viewing angle.

  As described above, according to the present embodiment, the viewing angle limiting films 8a and 8b are disposed between the half mirror 1 and the two background display devices 3a and 3b. It is possible to prevent the background images divided by the background display devices 3a and 3b from being viewed.

Sixth Embodiment
Next, a sixth embodiment will be described. In the sixth embodiment, it is an object to make the foreground and the background 3D.

  FIG. 7 is a top view showing a projection apparatus according to the sixth embodiment. The projector according to the sixth embodiment is the same as that of the first embodiment, but the device types of the foreground display device 2 and the two background display devices 3a and 3b are different.

  As the foreground display device 2 and the two background display devices 3a and 3b, it is generally considered to use a 2D display device such as a general-purpose display or a screen. On the other hand, in this embodiment, a 3D display device such as a 3D display, a multi-viewpoint screen, a multilayer display, a DFD (Depth-Fused 3-D), or the like is used.

  As described above, according to the present embodiment, the foreground display device 2 and the two background display devices 3a and 3b are configured by the 3D display device, so that the foreground and the background can be 3D.

Seventh Embodiment
Next, a seventh embodiment will be described. The seventh embodiment aims to make the background multilayered.

  FIG. 8 is a top view showing a projection apparatus according to the seventh embodiment. The projection apparatus according to the second embodiment is the same as the first embodiment, but further includes a convex half mirror 1B and a pair of background display devices 3c and 3d.

  In order to achieve the above object, in the present embodiment, two convex half mirrors 1A and 1B are arranged in multiple stages, and a pair of display devices for background ((3a, 3b) on both sides of each half mirror 1A, 1B. , (3c, 3d)) are respectively arranged. The pair of background display devices 3c and 3d in the second row are also arranged at positions maintaining the magnitude relationship of D1> D2 as shown in FIG. As a result, it is possible to project the virtual image of the background by the pair of background display devices 3c and 3d in the second row on the back of the virtual image of the background by the pair of background display devices 3a and 3b in the first row. Of course, it is also possible to project a virtual image of three or more layers of backgrounds by using three or more combinations of the half mirror 1 and the pair of background display devices.

  As described above, according to the present embodiment, since two half mirrors 1A and 1B and two pairs of background display devices ((3a, 3b), (3c, 3d)) are provided, the virtual image of the background is two layers. Can be

1, 1A, 1B: half mirror 2: display for foreground 3, 3a to 3d: display for background 4, 4a, 4b: boundary suppressor 5: foreground front floor 6, 6a, 6b: polarizing plate 7. polarization Plate 8a, 8b ... view angle limiting film

Claims (5)

Convex half mirror,
A foreground display device disposed on the non-convex side of the half mirror and displaying an object image obtained by photographing an object;
And two background display devices respectively disposed vertically on the foreground display device on both sides of the half mirror and respectively display divided background images obtained by dividing the background image for the subject image into right and left.
The split background images respectively displayed on the two background display devices are respectively reflected by the half mirror, and a virtual image of the background image is displayed on the far side of the subject image displayed on the foreground display device. A projection device characterized by The half mirror has a shape in which a convex portion of a convex shape is curved,
The background display device is
The projection apparatus according to claim 1, wherein the ratio of the size in the horizontal axis direction of the divided background image of the portion reflected by the curved portion of the half mirror is changed according to the curvature of the curved portion. The half mirror is formed by bending one flat half mirror, and the transmittance of the bent curved portion is higher than the transmittance of the flat portion,
The background display device is
The projection apparatus according to claim 1 or 2, wherein the brightness of the divided background image of the portion reflected by the curved portion of the half mirror is changed according to the transmittance of the curved portion.   It further comprises a boundary suppressor disposed on the floor between the half mirror and the background display, and having the same texture as the floor texture between the half mirror and the foreground display. The projection apparatus according to any one of claims 1 to 3, characterized in that:   4. The apparatus according to claim 1, further comprising: a boundary suppression body disposed on a floor surface between the half mirror and the background display device and having a texture related to the subject displayed on the foreground display device. The projection apparatus according to any one of 4.