JP2006010852A - Display apparatus and image pickup apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To view a high resolution, sharp stereoscopic image from any directions without taking into account of the timing of projecting two-dimensional division images. <P>SOLUTION: A polygon mirror 5 composed of, for example, twenty-four mirrors arranged almost in a ring form around the rotatory shaft 23 of a screen 3 is disposed. In addition, four projectors 1a to 1d are arranged above the polygon mirror 5 and on the same circle around an axis 24 extended from the rotatory shaft 23. The projectors 1a to 1d each emit projection images including the division images for the corresponding group of six mirrors. These division images represent different sides of the same object. They are reflected by the different mirrors and projected onto the screen 3. The screen 3 is rotated such that the division images reflected by opposite mirrors are projected onto the faces of the screen 3. This forms and displays a stereoscopic image in which different sides of the object can be seen from different directions. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a display device and an imaging device that enable stereoscopic viewing by viewing different sides of a display object as the displayed video is viewed around the periphery.

  A display device that displays a stereoscopic image using a rotating screen has been proposed. As an example, two-dimensional image data of this object is created from three-dimensional image data representing the three-dimensional object when the object is viewed from each direction around the object. When creating the dimensional image data, a hidden surface erasing process that erases the data of the invisible part is performed), which is projected in turn on the rotating screen, but with the change in the orientation of the screen due to the rotation, The two-dimensional image projected on this is sequentially changed. According to this, when the screen is viewed from a certain point, the image displayed on the screen gradually changes by increasing the rotation of the screen. By performing the image display in this way, the projected image on the screen can be seen as a three-dimensional image with a visual afterimage effect (see, for example, Patent Document 1).

  In addition, as in the technique described in Patent Document 1, when a two-dimensional image is projected by rotating a screen so that a three-dimensional image is obtained, if the illuminance distribution of the projected two-dimensional image is uniform, In the image projected on the screen, the illuminance decreases as it moves away from the rotation axis side of the screen, and the illuminance distribution becomes non-uniform. A technique has also been proposed in which the illuminance distribution is non-uniform and the illuminance distribution of the image projected on the screen is uniform (see, for example, Patent Document 2).

Furthermore, each of the display objects is photographed from different viewpoints to create slide images, and each time the rotating screen faces these viewpoints, the slide image obtained from the corresponding viewpoint is projected. A camera that raises the rotational speed of the screen to about 300 to 600 revolutions / minute to induce an afterimage of the naked eye to form a pseudo three-dimensional image on the screen, or to move the display object around the periphery. In this way, a cylindrical film of the captured image is created by sequentially capturing images, and the images of the cylindrical film are sequentially read, and the images are connected to a spatial position via a mirror that rotates in synchronization with the reading of the cylindrical film. And a technology to generate a three-dimensional space floating image by the afterimage of the naked eye by sufficiently increasing the rotation speed of this mirror. Is (e.g., see Patent Document 3).
JP2001-103515 JP 2002-27504 A JP 2002-271820 A

  By the way, since the techniques described in Patent Documents 1 and 2 enable stereoscopic viewing using an afterimage, it is necessary to display slightly different images almost simultaneously. For this purpose, a sufficiently large number of two-dimensional images are required, and it takes a lot of labor and time to create them, and a memory for storing the data of such two-dimensional images is also required. In addition, since it is necessary to rotate the screen at high speed, it is necessary to accurately project a two-dimensional image corresponding to the orientation of the screen onto the screen. Therefore, it is necessary to maintain synchronization with the projection timing with high accuracy.

  Further, the technique described in Patent Document 3 also projects a two-dimensional image read from a cylindrical film at a peripheral spatial position by projecting a two-dimensional slide image on a high-speed rotating screen or by a high-speed rotating mirror. By forming an image, an afterimage of the naked eye acts to make it appear as a three-dimensional image. When projecting this slide image on the screen, as in the techniques described in Patent Documents 1 and 2 above, when the screen faces the above viewpoint, the corresponding slide image can be projected on this screen. Although necessary, since the screen rotates at a high speed, a very high accuracy is required for the timing of projecting the slide image onto the screen.

  In the technique described in Patent Document 3, when a three-dimensional image is displayed using the two-dimensional image read from the cylindrical film, complicated means for the cylindrical film to sequentially read the images is required. In addition, since the image read from the cylindrical film is imaged in space, a clear three-dimensional image can be seen only at this imaging position, and the viewing position is very limited. It will be a thing.

  The present invention has been made in view of the above points, and its purpose is to allow a high-resolution clear stereoscopic image to be viewed from any direction without considering the projection timing of the two-dimensional image. Another object is to provide a display device and an imaging device.

  In order to achieve the above object, a display device according to the present invention includes a viewing angle control means, and a rotatable screen and a plurality of rings arranged in a ring shape along a conical surface having the rotation axis of the screen as a central axis. And a plurality of electronic projectors arranged at positions to project different frame images representing different side surfaces of the object onto different mirror surfaces, opposite to the mirror surfaces of the mirrors constituting the mirror group. Each of the plurality of electronic projectors is arranged so as to project a frame image onto one or more predetermined mirrors of the mirror group, and each of the mirrors is a frame image projected from the electronic projector. It is arranged on the optical path of the optical system reflected on the mirror surface and projected onto the screen.

  In addition, when the plurality of electronic projectors are arranged so as to project a frame image onto a plurality of predetermined mirrors in the mirror group, a plurality of mirrors that receive the projection of the frame image from one electronic projector Are set, and the tilt and position of each mirror are set for each set.

  In addition, the mirror surface tilts and positions relative to the conical surface so that the center of the frame image is irradiated to the center position of each mirror surface, and the light beam reflected by the center point of the mirror surface is irradiated to the center point of the screen. Is set.

  Further, the electronic projector can be exchanged with an imaging device, and the screen can be exchanged with an imaging target. The imaging device captures a side surface of the imaging target through a mirror group, thereby projecting the image from the electronic projector. The video can be created.

  In addition to having the same number of imaging devices as the electronic projector, the screen can be exchanged with the imaging target of the imaging device, and the imaging device projects from the electronic projector by imaging the side surface of the imaging target via the mirror group. This makes it possible to create a frame image.

  Further, the imaging target, a mirror group composed of a plurality of mirrors arranged in a ring shape along a conical surface having the central axis of the imaging target as a central axis, and the mirror surface of the mirror constituting the mirror group, An imaging device comprising an imaging device that captures different side surfaces of an imaging target via a mirror surface, obtains an image of the side surface of the imaging target captured by the imaging device, and creates a frame image projected by the electronic projector It is.

  Also, the number of imaging devices and electronic projectors used is different, and images of different sides of the imaging target are extracted from the captured images of the imaging device, and frame images projected by the respective electronic projectors are created.

  In addition, the number of imaging devices used is larger than the number of electronic projectors used, and the imaging device to be used is an imaging device having a lower resolution than the imaging device when the number is the same as the number of electronic projectors. .

  In addition, the number of imaging devices used is smaller than the number of electronic projectors used, and the imaging device used is an imaging device with a higher resolution than the imaging device when the number is the same as the number of electronic projectors. .

  The frame image projected by the electronic projector is created by computer graphics.

  In order to achieve the above object, an imaging apparatus according to the present invention is arranged in a ring shape along an imaging target installation area for installing an imaging target and a conical surface having the center of the imaging target installation area as a central axis. A plurality of imaging devices, each having a mirror group composed of a plurality of mirrors, and a plurality of imaging devices that are opposed to the mirror surfaces of the mirrors constituting the mirror group and that image different side surfaces of the imaging target viewed from each mirror. Each of the mirrors is arranged so as to capture an image of the side surface of the imaging target viewed from one or more predetermined mirrors in the mirror group, and each of the mirrors reflects the side image of the imaging target on the mirror surface of the mirror, and It is arranged on the optical path of the optical system to be imaged.

  In addition, when each of the plurality of imaging devices is arranged to capture a side image of the imaging target viewed from a plurality of predetermined mirrors in the mirror group, the plurality of mirrors to be captured by one imaging device are provided. As a set, the inclination and position of each mirror are set for each set.

  In addition, the image processing apparatus includes means for creating a projection image using a side image of the imaging target viewed from the mirror as a frame image from images captured by a plurality of imaging devices.

  According to the present invention, it is not necessary to consider the projection timing of each frame image on the screen, and a clear stereoscopic image with improved resolution can be obtained.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is an external perspective view of a display device according to a first embodiment of the present invention, in which 1 is an electronic projector, 2 is a rotation mechanism (rotation drive source), 3 is a screen with a viewing angle limiting filter, and 4 is Mirrors 5 are polygonal mirrors (mirror groups), and 6 is a control unit.

  In the figure, the screen 3 with a viewing angle limiting filter is driven to rotate continuously or stepwise by the rotation mechanism 2. The polygon mirror 5 is a group of conical mirrors composed of a plurality of mirrors arranged in a ring shape on a circular locus of the same radius around the central axis of the cone on the conical surface. It is affixed on the back surface (lower surface) of the top plate of the display device. The polygon mirror 5 and the mirror 4 form a projection optical system. The electronic projector 1 uses liquid crystal or the like and projects an image of an object. The image from the electronic projector 1 is reflected by the mirror 4 and the polygonal mirror 5 and then projected on the screen 3 with a viewing angle limiting filter. The control unit 6 controls the rotation mechanism unit 2 and supplies video data to the electronic projector 1.

  FIG. 2 shows a specific example of an image projected by the electronic projector 1, and represents a plurality of frame images Ga to Gp arranged in a ring shape. These frame images Ga to Gp are images when the same object is viewed from different positions around it. For example, if the frame image Ga is a frame image viewed from the front of the object, the frame image Gi is an image of the same object viewed from directly behind, and the positions of the frame images Ga to Gp on the projection image plane are It corresponds to the position to see. These frame images Ga to Gp are respectively reflected by separate mirrors of the polygon mirror 5 and projected onto the screen 3 with a viewing angle limiting filter.

  FIG. 3 is a diagram showing an overall schematic configuration of the first embodiment of the display device shown in FIG. 1, wherein 7 is a drive circuit, 8 is a storage unit, and parts corresponding to those in FIG. ing.

  In the figure, the storage unit 8 stores video data representing the frame videos Ga to Gp shown in FIG. The control unit 6 controls the drive circuit 7 to drive the rotation mechanism unit 2 to rotate the screen 3 with a viewing angle limiting filter, and to read out video data from the storage unit 8 and supply it to the electronic projector 1. Then, an image as shown in FIG. 2 is projected. The projection image composed of the frame images Ga to Gp may be arbitrarily created by computer graphics or the like, or may be created by imaging with a CCD camera as will be described later. Further, when the image is created by imaging with a CCD camera, the creation may be performed at a remote place, and the created video data may be received and stored in the storage unit 8.

  With the above configuration, the control unit 6 reads the video data from the storage unit 8 and supplies it to the electronic projector 1. The electronic projector 1 emits an image as shown in FIG. 2 based on the received image data. The emitted image is reflected by the mirror 4 and then reflected by a different mirror of the polygon mirror 5 for each of the frame images Ga to Gp and projected onto the screen 3 with a viewing angle limiting filter. As a result, as shown in FIG. 4, when the directions of viewing the screen 3 with the viewing angle limiting filter from the periphery of the screen 3 with the viewing angle limiting filter are ap, the frame images Ga to Gp are respectively viewed from the ap directions. Is projected onto the screen 3 with a viewing angle limiting filter. As a result, as shown in FIG. 5, different frame images Ga to Gp are displayed on the screen 3 with the viewing angle limiting filter depending on the direction of viewing the screen 3 with the viewing angle limiting filter from the periphery. In FIG. 5, the frame images Ga to Gp are images projected onto the screen 3 with the viewing angle limiting filter when viewed from the directions a to p shown in FIG. 4, for example, the screen with the viewing angle limiting filter from the a direction. 3, when the surface of the screen 3 with a viewing angle limiting filter faces in the direction a, the frame image Ga is displayed on the screen 3 with the viewing angle limiting filter and can be viewed.

  According to such a configuration, when the screen 3 with the viewing angle limiting filter is continuously viewed from one direction (for example, the a direction in FIG. 4), when the surface of the screen 3 with the viewing angle limiting filter faces the a direction, a frame image is displayed. Ga is projected and displayed on the screen 3 with the viewing angle limiting filter. For this reason, the frame image can be seen from the a direction. That is, the frame image Ga is displayed once every time the screen 3 with the viewing angle limiting filter is rotated once. Therefore, in order to make this frame image Ga, which is one side of the stereoscopic image, not flickering and to be seen as a continuous image, when it is in a state where it remains visually due to an afterimage of the eye after starting to see the frame image Ga The rotation speed of the screen 3 with the viewing angle limiting filter must be set so that the screen 3 with the viewing angle limiting filter rotates once to display the next frame image. In this way, the minimum rotation speed of the screen 3 with the viewing angle limiting filter is determined.

  6A is a sectional view showing a part of one specific example of the screen 3 with a viewing angle limiting filter in FIG. 1, FIG. 6B is a perspective view thereof, 9a is a screen plate member, and 9b is Viewing angle limiting filter 10 is a fin.

  In FIGS. 2A and 2B, the screen 3 with a viewing angle limiting filter is provided with a viewing angle limiting filter 9b formed of a plurality of light-shielding fins 10 on both surfaces of the screen plate member 9a. These fins 10 have a thickness of about 100 to 200 μm, for example, and are provided at a pixel size of the screen 3 with a viewing angle limiting filter, for example, with a pitch of about 0.5 to 2 mm. When the image shown in FIG. 4 is projected, the frame image projected on the adjacent mirror of the polygon mirror 5 (the adjacent frame image) is shielded from light even if the screen 3 with the viewing angle limiting filter is viewed from any direction. In this direction, only the frame image projected by the corresponding mirror is visible.

  The viewing angle restriction filter 9b restricts the viewing angle by the fin 10 so that the adjacent frame image cannot be seen. The height of the fin 10 is set according to the viewing restriction angle (visible range). Is done. Here, the field-of-view restriction angle is given by about ± 360 ° / (number of frame images per round × 4). For example, when the number of frame images of the projected image is 16 frames as shown in FIG. 2, the viewing angle limit (visible range) is ± 5.6 ° (= ± 360 ° / (16 × 4)). The height of the fin 10 for this purpose is about 5 to 20 mm. In the case of 10 frames, the visual field limit angle is about ± 9.0 ° (= ± 360 ° / (10 × 4)), and the height of the fin 10 for this is about 3.2 to 13 mm. is there.

  Alternatively, when the viewing angle is about ± 5.6 ° (for 16 frames), the thickness is about 3 to 20, and the viewing angle is about ± 9.0 ° (for 10 frames). In this case, a light shielding partition (not shown) having a thickness of about 50 to 200 μm that performs the same function as the fin 10 is provided in a transparent film or transparent substrate (not shown) having a thickness of about 1.9 to 13 mm. It can also be set as the structure inserted by the pitch of about 0.3-2 mm. In addition, a configuration in which a cylindrical lens that condenses light in the viewing angle limiting direction may be arranged.

  As another specific example of the screen 3 with a viewing angle limiting filter in FIG. 1, a directional reflective screen material as described in JP-A-11-258697 may be used. FIG. 7 is a sectional view showing a screen 3 with a viewing angle limiting filter using such a directional reflecting screen material, wherein 11 is a directional reflecting material screen, and 12 is a viewing angle limiting filter. 8 is a perspective view showing the configuration of the directional reflector screen 11 in FIG. 7, in which 11a is a corner mirror sheet and 11b is a lenticular sheet.

  In FIG. 7, this specific example has a configuration in which a viewing angle limiting filter 12 is provided on a directional reflector screen 11. As shown in FIG. 8, the directional reflector screen 11 is composed of a corner mirror sheet 11a and a lenticular sheet 11b, and is retroreflective in the horizontal direction and diffused in the vertical direction with respect to the incident light. It has the property of reflecting, and reflects incident light in the incident direction with an incident angle within ± 45 °. That is, while this directional reflector screen 11 is rotated within a range of ± 45 ° from the right to left of the person who is facing this person, the person can see the same image. Therefore, the screen 3 with a viewing angle limiting filter using the directional reflector screen 11 has a range of input angles that can be reflected in a predetermined direction as compared with the screen 3 with a viewing angle limiting filter configured as shown in FIG. Since it is wide, the amount of reflected light is large, and as a result, a brighter image can be obtained as compared with the case of using the screen 3 with a viewing angle limiting filter having the configuration shown in FIG.

  However, when only the directional reflector screen 11 is used, depending on the incident angle of light, the light may be reflected in a direction different from the incident direction. Frame images from the direction may appear to overlap each other. Therefore, in order to prevent such reflected light from other directions and allow the viewer to see only the frame image corresponding to the direction, a viewing angle limiting filter 12 is also provided as shown in FIG. It is what. The viewing angle limiting filter 12 has a structure in which fins are arranged at a fine pitch, similarly to the viewing angle limiting filter 9b shown in FIG. For example, by attaching a viewing angle limiting filter (viewing angle limiting optical system) 12 having a viewing angle limit (visible range) of ± about 24 degrees with respect to the normal to the surface of the directional reflector screen 11, As shown in FIG. 9, only the frame image from the correct direction is displayed and can be seen only from the ap direction (FIG. 4) from the reflected light of the frame image from the neighborhood. Become. As a result, when the viewing direction around the screen 3 with the viewing angle limiting filter is changed to a, b, c,..., P, the frame image Ga of the object corresponding to the viewing direction for each viewing direction. It becomes possible to see only -Gp (FIG. 5), and the effect that several persons can enjoy an image | video simultaneously from arbitrary directions is acquired. Further, the two directional reflector screens 11 are bonded back to back, and the viewing angle limiting filter 12 is bonded to the surface of each of the directional reflecting material screens 11, thereby making the double-face type viewing angle limiting filter-equipped screen 3. be able to. When the screen 3 with a double-sided viewing angle limiting filter is used, unlike the screen 3 with a single-sided viewing angle limiting filter, the image projected from the mirror in a certain direction is viewed twice during one rotation of the screen. And you can see a brighter image.

  FIG. 10 is a modification of the first embodiment of the display device shown in FIG. 1, and portions corresponding to those in FIG.

  In this figure, in this modification, an electronic projector 1 is fixed to the ceiling, and a rotating mechanism 2 and a screen 3 with a viewing angle limiting filter are installed below the vertical direction, and emitted from the electronic projector 1. The frame image is reflected by the polygonal mirror 5 having a conical surface and projected onto the screen 3 with a viewing angle limiting filter that rotates from the ap directions shown in FIG. Thereby, on the screen 3 with the viewing angle limiting filter, the frame images Ga to Gp as shown in FIG. 5 are displayed according to the direction (that is, the viewing direction).

  As described above, in the first embodiment, a plurality of people can enjoy a stereoscopic image from any direction at the same time, it is not necessary to adjust each mirror of the polygonal mirror 5, and the position and orientation of the mirror are not limited. Errors due to subtle deviations can also be reduced. Moreover, since the polygon mirror 5 can be arranged close to the screen 3 with the viewing angle limiting filter, the entire apparatus can be reduced in size, and a stereoscopic image can be viewed near the screen 3 with the viewing angle limiting filter.

  Further, since the projection image including all the frame images as shown in FIG. 2 can be always emitted from the electronic projector 1, it is not necessary to consider the emission timing for each frame image. Since the emitted frame image is projected onto the screen 3 with the viewing angle limiting filter, and the person views the projected frame image, a clear stereoscopic image can be viewed from any direction and position.

  In the above description, the electronic projector 1 is installed below the rotation axis of the screen 3 with the viewing angle limiting filter and projected upward, but the definition of these vertical positions makes it easy to understand. Therefore, it is used in relation to the rotational axis and the position where the image is formed, and is not limited to the positional relation with the floor or ceiling of the installation location of the display device. But you can.

  FIG. 11 is a diagram showing the principle of the imaging apparatus according to the present invention that creates the projection image shown in FIG. 2, wherein 13 is a CCD camera, 14 is a polygon mirror, and 15 is an object (photographing target).

  In the same figure, a polygon mirror 14 is composed of a plurality of mirrors arranged on a conical surface, like the polygon mirror 5 shown in FIG. 1, and a subject to be imaged around a central axis (not shown) of the conical surface. An object 15 is arranged. In addition, a CCD camera 13 is provided in an upward direction along the center axis of the conical surface so as to face downward. The entire polygon mirror 14 is included in the imaging field of view of the CCD camera 13. The mirrors of the polygon mirror 14 correspond to the directions a to p in FIG. 4, and the images of the object 15 reflected by the mirrors of the polygon mirror 14 are respectively captured by the CCD camera 13 as frame images. Is done. Thereby, for example, an image as shown in FIG. 2 is obtained. Note that the video imaged by the CCD camera 13 may be a still image or a moving image.

  FIG. 12 is a block diagram showing the first embodiment of the photographing apparatus according to the present invention using the principle shown in FIG. 11, wherein 16 is a mirror, and parts corresponding to those in FIG. .

  In this figure, here, the photographing target 15 is a person, and an image of the whole body of the person 15 is obtained. The mirror 16 is attached to the back surface of the ceiling above the CCD camera 13, and the CCD camera 13 faces the mirror 16 side. Each mirror of the polygonal mirror 14 is arranged on a conical surface like each mirror of the polygonal mirror 5 in FIG.

  Images of the person 15 viewed from the ap direction (FIG. 4) are reflected by the mirror corresponding to the polygonal mirror 14 and further reflected by the ceiling mirror 16 and imaged by the CCD camera 13. Thereby, an image as shown in FIG. 2 is obtained. In this case, as long as the polygon mirror 14 reflects light in the direction of the mirror 16, the imaging target is not limited, and a plurality of imaging targets may be included.

  FIG. 13 is a block diagram showing a second embodiment of the display device according to the present invention, in which 17 is a projection image photographing device based on the principle shown in FIG. 11, 18 is a communication channel, and FIGS. Corresponding portions are denoted by the same reference numerals and redundant description is omitted.

  In the figure, in the second embodiment, the display device is connected to the imaging device 17 via the communication path 18. In the imaging device 17, when the projection video is obtained by the CCD camera 13 as described in FIG. 11, the projection video is processed to generate a video signal such as NTSC / PAL, and this is communicated to the display device. Transmit via path 18. Upon receiving this video signal, the display device converts it to the original captured video and supplies it to the electronic projector 1. As a result, as in the first embodiment, the frame image of the object 15 corresponding to the rotation is displayed on the screen 3 with the viewing angle limiting filter, and in addition to the creation of the projection image, the stereoscopic image is displayed in real time. Is possible.

  Here, the communication path 18 may be wired or wireless. Further, the imaging device 17 may be configured to transmit the acquired projection video to a remote display device via a network. In this case, the imaging video may be sent as data in a digital video format such as MPEG. Good. Thereby, the stereoscopic image of the object 15 can be seen by this display device at a remote place.

  Furthermore, if the principle of the photographing apparatus shown in FIG. 11 is used, a photographing system having a size corresponding to the subject to be photographed can be made. In other words, by setting the size of each mirror of the conical polygon mirror and the size of the circle in which these mirrors are arranged in accordance with the size of the subject (imaging target), an imaging device corresponding to the imaging target can be obtained. Can be made. The height of the CCD camera is also adjusted so that the entire conical inner polygonal mirror can be accommodated in the field of view of the CCD camera, and frame images can be taken from all the mirrors of the polygonal mirror.

  FIG. 14 is an external perspective view showing a third embodiment of a display device according to the present invention. 19 is a sensor, and the same reference numerals are given to portions corresponding to those in FIG.

  This third embodiment enables interaction, and as shown in FIG. 14, sensors 19 are provided at a plurality of locations around the display device, or a mat switch is laid on the floor surface (not shown). By using such a method, it is possible to detect that a person is approaching. Further, as means for detecting the viewer's directions a to p (FIG. 4), it is sufficient to use as many infrared rays, proximity sensors, microphones, etc. as the number of directions to be detected (for example, 16 in the ap directions). At this time, the general movement of the viewer can be detected from the change in the signal obtained from the adjacent sensor.

  As shown in the figure, if a sensor 19 is provided, a signal obtained by the sensor 19 is processed by the control unit 6. The control unit 6 transmits an image corresponding to the movement of the viewer to the electronic projector 1. For example, the viewing angle limiting filter detects the direction in which the person approaches from the change in the signal of the sensor 19 and faces the character projected on the screen 3 with the viewing angle limiting filter directly facing the approaching person. Interaction such as rotating the attached screen 3 is possible. At this time, as a method of creating an image for causing the character to rotate, the control unit 6 stores the frame images Ga to Gp shown in FIG. 5 and, for example, the image shown in FIG. When projecting, by projecting an image in which the frame images Ga to Gp are shifted by one frame or several frames in the circumferential direction, it is possible to make a movement as if the character is rotating. Information on the direction indicating which of the frame images is in front may be stored in advance, and control may be performed so that the front image is formed in the direction detected when there is a person.

  Further, it is possible to perform an interaction such as returning the direction of the character in accordance with the direction in which the human hand moves or the movement from the signal change of the adjacent sensors 19. Furthermore, by attaching a plurality of sensors 19, it is possible to detect the approach and movement of a plurality of people and create an image corresponding to this.

  FIG. 15 is an external perspective view showing a fourth embodiment of a display device according to the present invention. Reference numeral 3a denotes a screen with a viewing angle limiting filter, and parts corresponding to those in FIG.

  In the same figure, this 4th Embodiment makes a semi-cylindrical shape, As shown in FIG. 15, it is comprised from the some mirror by which the polygonal mirror 5 was arranged in the shape of a semi-conical surface. . The viewing angle limiting filter-equipped screen 3a is rotationally driven continuously or stepwise by a rotation mechanism section (rotation drive source) 2. The mirror 4 is affixed to the back surface of the ceiling. The polygon mirror 5 and the mirror 4 form a projection optical system. For example, as shown in FIG. 16, the electronic projector 1 emits a projected image in which frame images Gb to Gi are arranged in a semicircular shape. The control unit 6 stores the projection image and supplies it to the electronic projector 1.

  FIG. 17 is a longitudinal sectional view of the fourth embodiment shown in FIG.

  In the figure, the electronic projector 1 emits a projection image as shown in FIG. 16 supplied from the control unit 6. This image is reflected by the mirror 4 on the back of the ceiling, and each frame image Gb to Gi of this image is reflected by the respective mirrors of the polygonal mirror 5 and projected onto the screen 3a with a viewing angle limiting filter.

  As shown in FIG. 16, the projected image emitted from the electronic projector 1 is obtained by dividing the divided frame images Gb to Gi (similar to FIG. 5) when the object is viewed in the ring region from the periphery, in the circumferential direction and half The images are arranged in a circle. As a method for creating such an image, it may be arbitrarily created by computer graphics or the like, or may be created by photographing with a CCD camera by the method described in FIG.

  In the fourth embodiment of the display device, the control unit 6 reads, for example, video data shown in FIG. 16 and supplies it to the electronic projector 1 with the above configuration. The electronic projector 1 emits a projection image of the supplied image data. The light of each of the divided frame images Gb to Gi in the ring area of the projected image that has been emitted is reflected by the mirror 4 on the back surface of the ceiling, and then further mirror surfaces of the polygonal mirrors 5 arranged in a semiconical surface. For example, the frame images Gb to Gi are projected onto the screen 3a with a viewing angle limiting filter from the bi directions shown in FIG. The screen 3a with a viewing angle limiting filter is a screen having a property of transmitting an image projected from the back side, but limits the viewing angle in the horizontal direction so that different images can be seen depending on the viewing direction, and further in the vertical direction. It is desirable that the screen has a wide viewing angle range. Therefore, a transflective screen or the like used in a rear projection display is used.

  As one method for realizing the screen 3a with a viewing angle limiting filter, a method using a Fresnel lens is conceivable.

  FIG. 18 is a diagram illustrating the characteristics of the Fresnel lens 20.

  In the same figure, the Fresnel lens 20 is a linse in which the lens curved surface is not continuous but stepped. When this Fresnel lens 20 is used, light passes through an extension line in the incident direction and is collected at a certain position, so that a viewer can see each of the mirrors of the polygonal mirror 5 arranged in a semiconical surface and such Fresnel. From a certain position on a straight line connecting the screen (Fresnel lens screen) 1a using the lens 20, an image reflected on the mirror can be seen. In other words, the use of the Fresnel lens 20 provides an effect that an image corresponding to the viewing direction can be seen, similar to the retroreflection described in the first embodiment.

  Further, while the angle of the Fresnel lens screen 3a is within a certain range (within the viewing angle range) from the angle facing the viewer, the image projected on the screen 3a can be viewed.

  FIG. 19 shows two types of Fresnel lenses, and the Fresnel lens 20a shown in FIG. 19 (a) is the most common one, with concentric curved cuts. . Since this Fresnel lens 20a condenses in both the horizontal direction and the vertical direction, when used in the screen 3a with a viewing angle limiting filter in FIGS. 15 and 17, the frame image reflected by each mirror of the polygon mirror 5 is used. Can be seen only from the range of viewing angles of the Fresnel lens in both the horizontal and vertical directions.

  Therefore, when the Fresnel lens 20b, which is stepped in the horizontal direction shown in FIG. 19B, is used for the screen 3a with a viewing angle limiting filter, the light is condensed only in the horizontal direction. It is suitable as a material for the screen 3a.

  Further, in order to suppress the light collection in the vertical direction and to make the image appear in a wider range, it may be processed so as to be diffusely reflected in the vertical direction. FIG. 20 shows a specific example thereof, in which a Fresnel lens is given a function of diffuse reflection in the vertical direction. In this example, a lenticular sheet 21 similar to the lenticular sheet 11b shown in FIG. 8 is bonded to the lens surface of the Fresnel lens 20, and the diffuse reflection in the vertical direction is realized. As a result, the entire surface of the screen with the viewing angle limiting filter 3a can be seen with a more uniform brightness in the vertical direction, which makes it easier to see.

  FIG. 21 is a configuration diagram (viewed from above) of the screen 3a with a viewing angle limiting filter in FIG. 15 in the case where a Fresnel lens is used, and the same reference numerals are given to portions corresponding to the previous drawings.

  In the figure, a lenticular sheet 21 for diffuse reflection shown in FIG. Further, in order to limit the viewing angle, similarly to the viewing angle limiting filter 9b shown in FIG. 6, a fin is attached to form the viewing angle limiting filter 22 to limit the target viewing angle, or PC or A viewing angle limiting filter that is also used in a liquid crystal screen of a mobile phone is used.

  In the fourth embodiment described above, unlike the first embodiment, an image projected from the back surface of the screen 3a with the viewing angle limiting filter is viewed, so that light is directly applied to the edge of the fin of the viewing angle limiting filter. Wo n’t be hit and flickering will be reduced. Thereby, an image with clear contrast can be seen. Moreover, in this 4th Embodiment, it can approach from the direction where the polygon mirror 5 is not installed instead of being able to go around the perimeter. Therefore, it can approach the screen 3a with a viewing angle limiting filter compared with the all-round display device. Further, in the cylindrical display device as in the first embodiment, in order to enlarge the screen 3 with the viewing angle limiting filter and the image displayed on the screen, it is necessary to enlarge the entire device. There is also a problem that the distance from the screen 3 is increased. However, in the fourth embodiment, even if the device itself is enlarged, the distance between the screen 3a and the viewer is not affected.

  Further, in the first embodiment of the display device, the projection image in which the frame images Ga to Gp (in the case of 16 frames) are arranged in a ring shape as shown in FIG. 2 is projected from the electronic projector 1. . However, in the fourth embodiment, the electronic projector 1 projects a projection image in which the frame images Gb to Gi (in the case of 8 frames) are arranged in a semicircular shape as shown in FIG. When the resolution of the projected image projected from the electronic projector 1 is the same, the required frame image is half of that in the fourth embodiment of the display device in the display device. For this reason, the resolution of each frame image projected from the electronic projector 1 in the fourth embodiment is four times the resolution of the frame image projected from the electronic projector 1 in the first embodiment. This improves the expressive power of the projected frame image.

  In the fourth embodiment of the display device described above, the polygonal mirror is a semicircular shape, but the cylinder in which the mirror is arranged may be half or more and half or less. In this case, The angle direction in which the image can be viewed is determined by the range of the angle direction in which the mirror is arranged in the cylinder. In addition, a screen with a viewing angle limiting filter that can transmit light and suppress reflection can be used to form a cylindrical display device around the entire periphery as in the first embodiment of the display device. Is possible.

  FIG. 22 is a main part configuration diagram showing a display device according to a fifth embodiment of the present invention, wherein 1a to 1d are electronic projectors, 25a to 25d are projection optical systems, and 26a to 26d are projection areas. Portions corresponding to the outgoing drawings are given the same reference numerals.

  In the figure, the fifth embodiment uses a plurality of electronic projectors, and here, it is assumed that four electronic projectors 1a to 1d are used. These electronic projectors 1a to 1d are arranged above a polygonal mirror (mirror group) 5, and the center of the projection optical systems 25a to 25d of these electronic projectors 1a to 1d is a screen 3 with a viewing angle limiting filter. These electronic projectors 1a to 1d are arranged so as to be on the circumference of the same radius centered on the extension shaft 24 of the rotary shaft 23 and at equal intervals (interval of 90 degrees when viewed from the extension shaft 24). Has been.

Each of the electronic projectors 1a to 1d arranged in this manner projects the polygon mirror 5 part by part. The projection area 26a is an area onto which an image emitted from the electronic projector 1a is projected. In the projection area 26a, at least one of the polygon mirrors 5 is provided.
(Number of mirrors constituting the polygon mirror 5) ÷ (Number of electronic projectors)
Are completely included in the projection area 26a. Here, assuming that the number of mirrors constituting the polygonal mirror 5 is 24, the number of electronic projectors is 4, and therefore the number of mirrors completely included in the projection region 26a is at least 6.

  The projection area 26b is an area onto which an image emitted from the electronic projector 1b is projected. In the projection area 26b, six mirrors following the six mirrors completely included in the projection area 26a are completely included. And it is contained in this projection area | region 26b full. Similarly, the projection area 26c is an area onto which an image emitted from the electronic projector 1c is projected. The projection area 26c includes six mirrors following the six mirrors completely included in the projection area 26b. Are completely included in the projection area 26c. The projection area 26d is an area onto which an image emitted from the electronic projector 1d is projected. In the projection area 26d, six mirrors between six mirrors completely included in the projection areas 26c and 26a are provided. It is completely included in the projection area 26d. This also applies to the specific examples described later.

  This will be described with reference to FIG. Assuming that the polygon mirror 5 is composed of 24 mirrors from the mirror 5 (1) to the mirror 5 (24), the mirror 5 (1) to the mirror 5 (6) are completely in the projection area 26a. The projection region 26b completely includes the mirrors 5 (7) to 5 (12), and the projection region 26c completely includes the mirrors 5 (13) to 5 (18). Thus, the projection area 26d completely includes the mirror 5 (19) to the mirror 5 (24).

  In the fifth embodiment of the display device, the polygon mirror 5 is composed of 24 mirrors 5 (1) to (24), and therefore is arranged in a ring shape as shown in FIG. A projection image including 24 frame images is used, and each of the electronic projectors 1a to 1d shares six frame images and projects them onto a mirror that is completely included in the corresponding projection area. FIG. 24 shows, for example, a projected image emitted from the electronic projector 1d. In this projected image, six frame images are displayed on the mirrors 5 (19) to 5 (24) in the projection region 26d. It is included in the sequence corresponding to the sequence. These six frame images are projected onto these mirrors 5 (19) to 5 (24), and the centers of these frame images are projected so as to coincide with the centers of the corresponding mirror surfaces. In addition, the position and orientation of the opening 25d (FIG. 22) of the electronic projector 1d are set. The same applies to the other electronic projectors 1a to 1c.

  The frame images of the projected images emitted from the electronic projectors 1a to 1d are reflected by the corresponding mirrors of the polygonal mirror 5 and projected onto the rotating screen 3 with a viewing angle limiting filter. Here, as in the first to fourth embodiments of the previous display device, when the projection port of the electronic projector 1 is on the extension shaft 24 of the rotation shaft 23 of the screen 3 with a viewing angle limiting filter, By arranging the surfaces of the mirrors of the polygonal mirror 5 on the same conical surface, a frame image is projected satisfactorily on the screen 3 with a viewing angle limiting filter. However, as in the fifth embodiment, When the projection ports 25a to 25d of the projectors 1a to 1d are deviated from the extension shaft 24, the surfaces of the mirrors of the polygon mirror 5 are arranged on the same conical surface. The frame image reflected by the mirror is projected at a position shifted on the screen 3 with the viewing angle limiting filter. Then, when a deviation occurs in the projection position as described above, when the viewer moves around the screen 3 with the viewing angle limiting filter and looks at the projection video of the screen 3 with the viewing angle limiting filter, the projected video is displayed. The position varies according to the viewing position, resulting in an unnatural display. For example, if the displayed projected image is an image of a stationary object, when the projected image is viewed while moving around the screen 3 with the viewing angle limiting filter, the projected image appears to move up and down, left and right. become.

  In order to eliminate such unnatural movement of the projected image displayed on the screen 3 with the viewing angle limiting filter, in the fifth embodiment, the polygonal mirror 5 on which the electronic projectors 1a to 1d project the frame image. The six mirrors are set as a set, and the direction of each mirror is adjusted for each set.

  That is, each mirror reflects an optical image formed between the electronic projector, the mirror, and the screen when the frame image projected from the corresponding electronic projector is reflected on the mirror surface and projected onto the screen 3 with the viewing angle limiting filter. Adjust so that the position and angle are appropriate on the optical path of the system.

  That is, now, the electronic projector 1a will be described with reference to FIG. 25. The central ray of each frame image in the projection image emitted from the electronic projector 1a corresponds to the mirror 5 ( 1), 5 (2), 5 (3), 5 (4), 5 (5), and 5 (6) after being reflected at the center of the screen 3 with the viewing angle limiting filter so as to be collected. More specifically, these mirrors 5 (1), 5 (2), 5 (3), 5 (4), 5 (5), and so on are collected at the center position of the screen 3 with the viewing angle limiting filter. 5 (6) slope is set.

  Therefore, a conical surface having an inclination of the center position of these mirrors 5 (1) to 5 (6), that is, the boundary between the mirror 5 (3) and the mirror 5 (4) is assumed. When the mirror is arranged at the boundary position, this conical surface is so reflected that the light at the center of the emitted light from the electronic projector 1a is reflected at the center of the mirror and is applied to the center of the screen 3 with the viewing angle limiting filter. If it has an inclination, these mirrors 5 (1) to 5 (6) are inclined with respect to the assumed conical surface. Since specific numerical values can be obtained by calculation, they are omitted. However, the mirror 5 (3) and the mirror 5 (4) are centered on the boundary between the mirror 5 (3) and the mirror 5 (4). The mirror 5 (2) and the mirror 5 (5) are tilted from the conical surface assumed to be equiangular in the direction facing each other, and the mirror 5 (1) and the mirror are tilted from the conical surface assumed to be equiangular in the direction facing each other. 5 (6) is inclined from the conical surface assumed to be equiangular in the direction facing each other. In this case, the inclination angles of the mirrors 5 (2) and 5 (5) are made larger than the inclination angles of the mirrors 5 (3) and 5 (4), and the inclination angles of the mirrors 5 (2) and 5 (5) are further increased. The inclination angle of the mirrors 5 (1) and 5 (6) is made larger than that.

  In this way, by setting the mirrors 5 (1) to 5 (6) to be inclined with respect to the assumed conical surface, the center light of each frame image emitted from the electronic projector 1a is respectively mirrored. After being reflected at the center position of 5 (1) to 5 (6), it is collected at the center position of the screen 3 with the viewing angle limiting filter. As a result, on the rotating screen 3 with a viewing angle limiting filter, the frame image reflected and projected by each mirror of the polygon mirror 5 is displayed at the correct position, and as shown in FIG. Even when the stereoscopic image displayed on the screen 3 with the viewing angle limiting filter is viewed while moving around, an unnatural movement or shaking of the stereoscopic image does not appear, and a favorable stereoscopic image can be viewed.

  In the fifth embodiment of the display device, a plurality of (4 in this case) electronic projectors 1a to 1d are used to share and display a plurality of frame images representing a stereoscopic image. Looking at each of the projectors 1a to 1d, the number of frame images to be displayed is smaller than that in the first to fourth embodiments, and each frame image when emitted from the electronic projectors 1a to 1d is enlarged accordingly. Therefore, each frame image can be projected as a high-resolution image. As a result, the three-dimensional image projected on the screen 3 with the viewing angle limiting filter becomes a high-definition image with high resolution.

  FIG. 27 is a block diagram showing another embodiment of the photographing apparatus according to the present invention for creating projected images for each of the electronic projectors 1a to 1d in FIG. 22, wherein 27a to 27d are imaging devices such as CCD cameras. , 28a to 28d are optical systems of the imaging devices 27a to 27d, 29a to 29d are imaging regions, 30 is an imaging target, and parts corresponding to those in FIG.

  When creating projection images for each of the electronic projectors 1a to 1d in FIG. 22, in the display device shown in FIGS. 22 and 26, the screen 3 with a viewing angle limiting filter is removed from the rotary shaft 23 (FIG. 25). Further, as shown in FIG. 27, an imaging target 30 that is a target object of these projection images is attached.

  That is, in FIGS. 22 and 26, the position where the screen 3 with the viewing angle limiting filter is installed is the installation area of the imaging target.

  At the same time, the electronic projectors 1a to 1b (FIG. 22) are removed, and the imaging devices 27a to 27d are attached instead. Each of these electronic projectors 27a, 27b, 27c, and 27d images the imaging areas 29a, 29b, 29c, and 29d with respect to the polygonal mirror 5, and here, the imaging area 29a is the electronic in FIG. 22 and FIG. So as to coincide with the projection area 26a of the projector 1a (in this case, it is not necessary to completely coincide, but from the point of resolution described later, a plurality of mirrors for photographing as a frame image in the imaging area 29a is provided. (This is the same for the other imaging regions 29b to 29d and in the case of the sixth embodiment of the display device described later), the position of the imaging device 27a, The inclination of the optical axis of the optical system 28a (accordingly, the orientation of the imaging device 27a) is set, and similarly, the imaging region 29b is the electronic program shown in FIGS. The position of the imaging device 27b and the inclination of the optical axis of the optical system 28b (accordingly, the orientation of the imaging device 27b) are set so as to coincide with the projection area 26b of the projector 1b, and the imaging area 29c is shown in FIGS. The position of the imaging device 27c and the inclination of the optical axis of the optical system 28c (accordingly, the orientation of the imaging device 27c) are set so as to coincide with the projection area 26c of the electronic projector 1c of FIG. The position of the imaging device 27d and the inclination of the optical axis of the optical system 28d (and hence the orientation of the imaging device 27d) are set so as to coincide with the projection area 26d of the electronic projector 1d in FIG.

  According to this, as shown in FIG. 28, for example, when the imaging device 27a sees one mirror 5 (i) of the polygon mirror 5 in the imaging area 29a, the imaging target 30 is related to this mirror 5 (i). Is to image a virtual imaging object 30 ′ at a symmetrical position. With respect to the three-dimensional coordinate system of x (vertical), y (horizontal), and z (height) for the imaging target 30, u (vertical), v (horizontal), and w (height) for the virtual imaging target 30 ′. ) Is rotated in accordance with the inclination of the surface of the mirror 5 (i) in the x, y, z coordinate system. Thereby, the imaging device 27a can see the same side of the virtual imaging symmetry 30 ′ as the side of the imaging target 30 viewed through the mirror 5 (i) with the same size, and thus the mirror 5 (i). The side surface of the imaging object 30 that can be seen through the image can be captured.

  The same applies to the other mirrors of the polygon mirror 5 in the imaging region 29a, and the side surface of the imaging target 30 viewed from each of the mirrors included in the imaging region 29a is simultaneously imaged by the imaging device 27a. The same applies to the other imaging devices 27b to 27d.

  In this way, each of the imaging devices 27a to 27d performs shooting of the imaging target 30 (in this case, these imaging devices 27a to 27d may shoot simultaneously or at different timings). Thus, an image as shown in FIG. 29A is obtained. That is, regarding the imaging device 27a, a captured image including a side image of the imaging target 30 reflected by all the mirrors of the polygon mirror 5 included in the imaging region 29a (FIG. 27) of the imaging device 27a is obtained. It will be.

  The captured video is processed to create a projected video in which only the necessary side video is extracted as a frame video, as shown in FIG. In this case, as shown in FIG. 23, side images from the mirrors 5 (1) to 5 (6) in the projection area 26a (equal to the imaging area 29a) are extracted to create a projection image as a frame image. Is done. The same applies to the captured images obtained from the other imaging devices 27b to 27d, and thus the projected images projected from the respective electronic projectors 1a to 1d in FIG. 22 are created.

  In addition, as a method of removing the reflected image from the unnecessary mirror from the captured images of the imaging devices 27a to 27d, a mask for shielding the image light from the unnecessary mirrors applied to the optical systems 28a to 28d of the imaging devices 27a to 27d is provided. Alternatively, the signal components of the video from the unnecessary mirror may be removed by, for example, gating the output video signals of the imaging devices 27a to 27d.

  FIG. 30 is a diagram showing a system configuration when a projected image is created by the imaging device shown in FIG. 27 for the fifth embodiment of the display device. 31a to 31d are clients, and 32a to 32d are control processes. , 33a to 33d are storage units, 34a to 34d are communication units, 35 is a server, 36 is a control unit, 37 is a communication unit, 38 is a communication path, and parts corresponding to FIG. Yes.

  In the figure, each of the clients 31a to 31d is connected to the communication unit 37 of the server 35 via the communication path 38 by the communication units 34a to 34d. Each of the clients 31a to 31d is provided with control processing units 32a to 32d and storage units 33a to 33d. Further, the server 35 is provided with a control unit 36 that generates various command signals in response to an operation of an operation unit (not shown). Here, since the projection images of the electronic projectors 1a to 1d (FIG. 22) are created, the imaging devices 27a to 27d are connected to the control processing units 32a to 32d of the clients 31a to 31d, respectively. The imaging devices 27a to 27d are arranged as described with reference to FIG.

  Now, when the user of this display device performs a command operation for creating a projected image by operating means (not shown) in the server 35, the control unit 36 generates a command signal and transmits it from the communication unit 37 to the communication path 38. To do. This command signal is transmitted through the communication path 38 and received by the communication unit 34a of the clients 31a to 31d. In the client 31a, the control processing unit 32a causes the imaging device 27a to start imaging in response to a command signal received by the communication unit 34a. The video signal output from the imaging device 27a by this imaging is processed by the control processing unit 32a and then stored in the storage unit 33a as a video signal of a projection video used for the electronic projector 1a (FIG. 22). In this case, the control processing unit 32a may perform a process of removing a signal component due to a reflected image from an unnecessary mirror of the polygon mirror 5 (FIG. 27). Thereby, the projection video used for the electronic projector 1a (FIG. 22) is stored in the storage unit 33a.

  The same applies to the clients 31b to 31d, and projection images used for the electronic projectors 1b to 1d (FIG. 22) are stored in the storage units 33b, 33c, and 33d.

  Note that, when displaying a stereoscopic image of a still image, projection image data stored in the storage units 33a to 33d may be image data of one field or one frame period, but the imaging target 30 (FIG. 27). ) Is moving, and when displaying a stereoscopic image of the imaging target 30, projection images for a predetermined period are stored in the storage units 33a to 33d as necessary. From the above, when the imaging device 27a to 27d is started to be imaged by an activation command from the server 35 by the operation of the user of the display device, and the user performs a command operation for still image imaging, the imaging devices 27a to 27d The output video signal is extracted for one field or one frame period, and this is stored in the storage units 33a to 33d as projection video data of the electronic projectors 1a to 1d. 33a to 33d, a recording start command and a recording end command are issued), and a captured video signal for a period corresponding to the command may be recorded in the storage units 33a to 33d as projection video data.

  As described above, when recording projection video data in the storage units 33a to 33d of the respective clients 31a to 31d and displaying a stereoscopic video using these projection videos, as shown in FIG. In 31a, the imaging device 27a is removed and the electronic projector 1a is attached. Similarly, in the clients 31b to 31d, the imaging devices 27b to 27d are removed and the electronic projectors 1b to 1d are attached. At this time, these electronic projectors 1a to 1d are arranged as described with reference to FIG.

  After the above configuration, when a user of the display device performs a display command operation using an operation unit (not shown) of the server 35, the control unit 36 generates a display command signal and transmits the display command signal from the communication unit 37 to the communication path 38. . In each of the clients 31a to 31d, the display command signal is received by the communication units 34a to 34d and supplied to the control processing units 32a to 32d. Upon receiving this display command signal, these control processing units 32a to 32d start up the electronic projectors 1a to 1d, take in projection image data from the storage unit 33a, and supply them to the electronic projectors 1a to 1d. As a result, the electronic projectors 1a to 1d project their respective projected images, and as a result, stereoscopic images are displayed on the rotating screen 3 with a viewing angle limiting filter (FIG. 22).

  In the above description, the imaging devices 27a to 27d and the electronic projectors 1a to 1d are replaced by the same clients 31a to 31d to create a projected image and project the projected image. 27. As shown in FIG. 27, the image pickup devices 27a to 27d are arranged in an arrangement relationship in which the arrangement relationship is rotated by a predetermined angle around the extension shaft 24 with respect to the arrangement of the projectors 1a to 1d. 22, an imaging device 27a is disposed between the electronic projectors 1a and 1b, an imaging device 27b is disposed between the electronic projectors 1b and 1c, and an imaging device 27c is disposed between the electronic projectors 1c and 1d. By arranging the imaging device 27d between the electronic projectors 1d and 1a, the imaging devices 27a to 27 are arranged. It is possible to to eliminate the replacement work of the electronic projector 1a~1d. In this case, as shown in FIG. 32, the projection areas 26a to 26d (indicated by solid lines) of the electronic projectors 1a to 1d shown in FIG. The rotated one is set to the positions (indicated by broken lines) of the imaging regions 29a to 29d of the imaging devices 27a to 27d shown in FIG.

  In the case of such a configuration, as shown in FIG. 33, an imaging device 27a and an electronic projector 1a that projects a projection image created thereby can be connected to the same client 31a. Similarly, the client 31b The imaging device 27b and the electronic projector 1b that projects the projection image created thereby are imaged on the client 31c, and the imaging device 27c and the electronic projector 1c that projects the projection image created thereby are imaged on the client 31d. The device 27d can be connected to the electronic projector 1d that projects the projection image created thereby. Then, the clients 31a to 31d read the projection video data obtained by the imaging of the imaging devices 27a to 27d and stored in the storage units 33a to 33d under the control of the display control units 39a to 39d, respectively. Then, the projection images are supplied to the electronic projectors 1a to 1d, and the respective projected images are projected.

  In this case, the stereoscopic image displayed by the rotating screen 3 with the viewing angle limiting filter is rotated around the rotation axis 23 by the predetermined rotation angle with respect to the original imaging target imaged by the imaging devices 27a to 27d. This is not relevant for the viewer. Needless to say, the server 35 issues a command for imaging an imaging target with the imaging devices 27a to 27d and a command for projecting a projected image with the electronic projectors 1a to 1d.

  In the above system, the storage units 33a to 33d are provided for the clients 31a to 31d (FIGS. 30, 31, and 33). As shown in FIG. 40, and the projection video data generated by the clients 31a to 31d may be stored together in the storage unit 40. In the case of displaying a stereoscopic video, the data of the corresponding projection video read from the storage unit 40 may be supplied to each electronic projector (not shown). 34, the imaging devices 27a to 27d and the electronic projector are exchanged by the clients 31a to 31d. However, as shown in FIG. 33, the imaging device and the electronic projector may be connected. Good.

  Furthermore, in the above description, four electronic projectors are used. However, the present invention is not limited to this, and each electronic projector projects an equal integer number of frame images, and these electronic projectors provide polygon mirrors. If the number of mirrors constituting the polygonal mirror is m and the number of electronic projectors to be used is n, then m ÷ n is The number of electronic projectors m), which is an integer, and the number of electronic projectors used are not limited to four.

  FIG. 35 (a) shows a case where two electronic projectors are used. In this case, projection areas 26a and 26b are set for each, and half of the mirrors forming the polygonal mirror 5 are provided. (Here, it is assumed that the polygon mirror 5 is composed of 24 mirrors, and therefore each of them is 12). Each electronic projector is responsible for the projection of the frame image. FIG. 35 (b) shows a case where six electronic projectors are used. In this case, projection areas 26a, 26b, 26c, 26d, 26e, and 26f are set for each of the electronic projectors. The number of mirrors that form the square mirror 5 is one-sixth of the number (here, the polygonal mirror 5 is made up of 24 mirrors, and therefore four each). Will be responsible.

  In the fifth embodiment of the display device described above, the polygon mirror 5 is used for creating projected images by the imaging devices 27a to 27d and for projecting projected images by the electronic projectors 1a to 1d. As in the second embodiment of the display device shown in FIG. 13, an imaging device for creating a projection image used for each electronic projector is provided separately, and the created projection image is transmitted to each electronic projector. You may do it.

Next, a sixth embodiment of the display device according to the present invention will be described.
In the fifth embodiment of the display device described above, the number of used imaging devices and electronic projectors for creating a projected image is equal, but in the sixth embodiment of this display device, The number used is different. That is, the configuration for displaying a stereoscopic image using the electronic projector of the sixth embodiment of the display device is basically the same as the configuration shown in FIG. 22, and the projection image used for these electronic projectors is created. The configuration of the imaging apparatus for this purpose is basically the same as that shown in FIG. 27, but the number of used imaging devices and electronic projectors is different as described above.

  FIG. 36 shows a process of creating a projection image used for these electronic projectors in the sixth embodiment of the display device when six image pickup devices are used as the image pickup device and four electronic projectors are used as the display device. FIG.

  FIG. 36A shows an imaging region of each imaging device with respect to the polygon mirror 5 when configured as an imaging device. Here, the number of mirrors constituting the polygon mirror 5 is 24. It is said. Here, as shown in FIG. 22, the polygon mirror may be a polygon mirror 5 used when displaying a stereoscopic image (in this case, the imaging device and the electronic projector are exchanged). It may also be provided in an imaging device that is used exclusively for creating a projected video. In addition, the imaging area by an imaging device is made into imaging area 29a, 29b, 29c, 29d, 29e, 29f in order. Imaging devices for the imaging regions 29a, 29b,..., 29f are imaging devices 27a, 27b,. In addition, the four electronic projectors used in the case of being configured as a display device are referred to as electronic projectors 1a, 1b, 1c, and 1d.

  As shown in FIG. 36A, the imaging region 29a of the imaging device 27a is set to a region that completely includes the four mirrors of the polygonal mirror 5, as in the fifth embodiment, and the next imaging device 27b. The imaging area 29b is set to an area that completely includes the following four mirrors. Similarly, the imaging areas 29c, 29d, 29e, and 29f are set to areas that completely include four mirrors in order (in this case, each of the imaging areas 29a to 29f includes four mirrors). It ’s better to include it as much as possible.)

  As a result, as shown in FIG. 36 (b), an imaged image 41a including four complete frame images is obtained from the image pickup device 27a, and the next four complete frame images are included from the image pickup device 27b. A captured image 41b is obtained. In the same manner, although not shown, captured images including four complete frame images are obtained from the imaging devices 27c, 27d, 27e, and 27f. Of course, these frame images are images when an imaging target (not shown) is viewed from different directions.

  A frame image is extracted from the captured images 41a and 41b thus obtained as shown in FIG. Assuming that the frame images 42a, 42b, 42c, 42d, 42f, 42g, 42h, and 42i are selected, the six frame images 42a, 42b, 42c, 42d, and 42f are selected in order, and FIG. As shown in (), an image in which these are arranged in an arc shape is created. This is a projection image used for one of the electronic projectors, that is, the electronic projector 1a.

  Further, four frame images are extracted from the captured image obtained by the imaging device 27c capturing the imaging region 29c, and the remaining frame images 42g and 42h of the frame image extracted from the captured image 41b by the imaging device 27b. An image in which (FIG. 36C) is arranged in an arc shape is created. This is a projection image used for the next electronic projector 1b. In this way, projection images used for the two electronic projectors 1a and 1b are obtained from the captured images obtained from the three imaging devices 27a to 27c. Similarly, a projection image used for the electronic projector 1c is created from the four frame images obtained by imaging the imaging region 29d and the two frame images obtained by imaging the imaging region 29e, and the imaging region 29e is created. A projection image used for the electronic projector 1d is created from the remaining two frame images of the frame image obtained by the above imaging and the four frame images obtained by the imaging of the imaging region 29f.

  In this way, projection images used for four electronic projectors are created using six image pickup devices, but each image pickup device is different from the case where the same number of image pickup devices as electronic projectors are used. A large frame image can be captured in the captured image, and as a result, the resolution of the frame image is increased. Therefore, when six image pickup devices are used, a high-definition stereoscopic image with improved resolution can be obtained compared to the case where the same number of image pickup devices as the electronic projector is used. If a 3D image with the same resolution as when using the same number of imaging devices as the projector is obtained, the resolution of each imaging device shall be lower than when using the same number of imaging devices as the electronic projector. Therefore, an inexpensive imaging device with a low resolution can be used. This applies to the case where the number of used imaging devices and electronic projectors is not limited to the above example, and the number of used imaging devices is larger than the number of used electronic projectors.

  FIG. 37 shows a sixth embodiment of the display device when one image pickup device is used when configured as an image pickup device, and when four electronic projectors are used when configured as a display device. It is a figure which shows the preparation process of the projection image | video used for these electronic projectors.

  FIG. 37A shows the imaging region of the imaging device with respect to the polygon mirror 5, and here, the number of mirrors constituting the polygon mirror 5 is 24. Also in this case, as shown in FIG. 22, the polygon mirror 5 may be a polygon mirror 5 used when displaying a stereoscopic image (in this case, the imaging device and the electronic projector are They may be used interchangeably, or may be arranged at the center of the arrangement of four electronic projectors (on the extension shaft 24 in FIG. 22)), or a projected image It may be provided in an imaging device that is used exclusively for creating the image. Note that an imaging area by this imaging device is an imaging area 29. An imaging device for the imaging area 29 is an imaging device 27, and four electronic projectors to be used are electronic projectors 1a, 1b, 1c, and 1d.

  As shown in FIG. 37A, the imaging region 29 of the imaging device 27 completely includes the entire polygonal mirror 5 (preferably so that it is included as much as possible in the imaging region 29). The captured image obtained by the imaging device 27 includes all frame images arranged in a ring shape.

  Each frame image is extracted from the captured image thus obtained (FIG. 37 (b)), and is divided into the number of electronic projectors used in the order of arrangement (ie, 24 ÷ 4 = 6 frame images). 37) For each section, as shown in FIG. 37 (c), a projection image in which six frame images are arranged in an arc shape according to the arrangement of the mirrors in the polygon mirror 5 is created. In this way, projection images used for the electronic projectors 1a to 1d are created.

  In this way, when one imaging device 29 is used, the frame image in the captured image becomes smaller than when a plurality of imaging devices are used as in the specific example shown in FIG. Although the resolution of the video is lowered, if the imaging device 29 is a high-resolution device, a considerably high resolution of the frame video can be obtained, and a high-definition stereoscopic video can be obtained. It will be. This is also true when two or more imaging devices are used. When a high-resolution imaging device is used, the number of imaging devices used should be less than the number of electronic projectors used. Can do.

  FIG. 38 is a diagram conceptually showing still another embodiment of the imaging apparatus according to the present invention for creating a projected image in the sixth embodiment of the display apparatus.

  In this specific example, as shown in FIG. 5A, a plurality of imaging devices 27 are arranged around the imaging target 30, and each side images the side surface of the imaging target 30 from different directions. Here, as the imaging devices 27, the number equal to the number of frame images when displaying a stereoscopic image with an electronic projector, that is, the number of mirrors constituting a polygon mirror is used. Therefore, for example, if the number of mirrors constituting the polygonal mirror is 24, 24 imaging devices 27 are also used, and the imaging directions of the imaging target 30 are the same at the same intervals around the imaging target 30. Arranged to point to a single point. Each of these imaging devices 27 corresponds to each mirror constituting the polygon mirror, and directly and simultaneously images the side surfaces of the same imaging target 30 from different directions. In this way, each imaging device 27 obtains a captured image that is a frame image irradiated on the corresponding mirror of the polygonal mirror.

  Then, as shown in FIG. 38B, a frame image used for stereoscopic display is extracted from the captured images from each imaging device 27 and corresponds to the arrangement order of the imaging devices 27 when imaging the imaging target 30. Assuming an arrangement of frame images as shown in FIG. 37 (a), the frame images are distributed to the electronic projectors used for stereoscopic display in this arrangement order. For example, if the polygon mirror is composed of 24 mirrors, the number of imaging devices 27 is 24 (thus, 24 frame images can be obtained), and the number of electronic projectors used is 4. The obtained 24 frame images are divided into 6 pieces, and the divided 6 pieces of frame images are sequentially assigned to the respective electronic projectors.

  As shown in FIG. 38 (c), the six frame images allocated in this way are arranged in an arc shape according to the arrangement of the mirrors in the polygon mirror, and an electronic projector comprising such an arrangement of the frame images. A projected image is created.

  In this way, this specific example directly captures the imaging target 30 with the imaging device 27 without using a polygon mirror, and therefore can deal with a large imaging target 30 and has a high degree of freedom. Also, a high-resolution frame image can be obtained, and a high-resolution stereoscopic image can be obtained.

  As described above, in the sixth embodiment of the display device, it is possible to obtain a higher-resolution three-dimensional image as compared with the fifth embodiment of the display device described with reference to FIGS. It is possible to reduce the number of devices used.

  By the way, in the fifth and sixth embodiments of the display device described above, the projected video emitted from the electronic projector can be created from the captured video obtained from the imaging device of the imaging device. Can be created. FIG. 39 is a flowchart showing a process of creating a projection image corresponding to the resource (supply source) of the projection image.

  In the figure, when a video output request is received from the user of the display device (step 100), it is determined whether or not the video resource is a camera (imaging device) (step 101). Assuming now that the captured image of the camera is used, the camera is connected (activated) (step 102), and the captured image is acquired from the camera (step 103). Then, for each camera, the number of mirrors that the polygon mirror is in charge of (i.e., picks up an image for the frame image) is obtained (step 104), and the frame image from that number of mirrors is cut out (step 5). Also, for each electronic projector, calculate the number of mirrors in charge of the polygon mirror (step), and create a projection image in which the corresponding frame image is arranged for each of the mirrors in consideration of its position and arrangement (Step 109). Then, the created projection images are respectively supplied to the corresponding electronic projectors and emitted (step 110). As a result, a stereoscopic image is formed and displayed on the previous screen with a viewing angle limiting filter.

  If the resource is something other than a camera such as a computer graphic (step 101), a video resource is selected and set (step 106), and a video, that is, a frame video is captured from this resource (step 107). . Then, by performing the processing of steps 108 and 109 on the captured frame image, a projection image for each electronic projector is created and projected to display a stereoscopic image such as an animation, for example. (Step 110).

It is an external appearance perspective view which shows the principal part of 1st Embodiment of the display apparatus by this invention. It is a figure which shows 16 frame images projected on the rotating screen from an electronic projector. It is a block diagram which shows schematically the whole 1st Embodiment shown in FIG. It is a figure which shows 16 directions ap of the circumference | surroundings with respect to the screen with a rotation viewing angle restriction | limiting filter in FIG. It is a figure which shows 16 frame images Ga-Gp used as a three-dimensional image by going around the periphery in 1st Embodiment of the display apparatus shown in FIG. It is explanatory drawing of a specific example of the screen with a viewing angle limiting filter in FIG. It is a block diagram which shows the other specific example of the screen with a viewing angle restriction | limiting filter in FIG. It is a perspective view which shows one specific example of the directional reflector screen in FIG. It is explanatory drawing of a visual field restriction | limiting angle. It is an external appearance perspective view which shows the modification of 1st Embodiment of the display apparatus shown in FIG. It is explanatory drawing of the principle of the imaging device by this invention for preparation of the projection image | video shown in FIG. It is an external appearance perspective view which shows one Embodiment of the imaging device by this invention using the principle shown in FIG. It is an external appearance perspective view which shows 2nd Embodiment of the display apparatus by this invention. It is an external appearance perspective view which shows the principal part of 3rd Embodiment of the display apparatus by this invention. It is an external appearance perspective view which shows the principal part of 4th Embodiment of the display apparatus by this invention. It is a figure which shows a specific example of the projection image used in 4th Embodiment of the display apparatus shown in FIG. It is a longitudinal cross-sectional view of 4th Embodiment of the display apparatus shown in FIG. It is a figure which shows the characteristic of a Fresnel lens. It is a figure which shows a different kind of Fresnel lens. It is a figure which shows one specific example of the Fresnel lens which implement | achieved the diffuse reflection of the perpendicular direction. It is sectional drawing which shows the screen with a viewing angle restriction | limiting filter in FIG. 15 using the Fresnel lens shown in FIG. It is an external appearance perspective view which shows the principal part of 5th Embodiment of the display apparatus by this invention. It is a figure which shows the projection area | region by each electronic projector in FIG. It is a figure which shows typically the projection image by the electronic projector in FIG. It is a figure for demonstrating arrangement | positioning of the mirror corresponding to the electronic projector in the polygon mirror in FIG. It is a perspective view which shows the whole external appearance of 5th Embodiment of the display apparatus by this invention. It is a block diagram which shows other embodiment of the imaging device by this invention which produces the projection image used for each electronic projector in FIG. It is a figure which shows notionally the imaging of the imaging device with the imaging device shown in FIG. FIG. 28 is a diagram showing a specific example of a method for creating a projection image used for the electronic projector shown in FIG. 22 from the imaged image of the imaging device shown in FIG. 27. FIG. 28 is a block diagram showing a specific example of a system configuration for creating a projection video by the imaging device shown in FIG. 27 for the fifth embodiment of the display device shown in FIG. 22. FIG. 23 is a block diagram showing a specific example of a system configuration using the fifth embodiment of the display device shown in FIG. 22. FIG. 23 is a diagram illustrating a relationship between an imaging region of an imaging device and a projection region of an electronic projector when the fifth embodiment of the display device illustrated in FIG. 22 has a system configuration including an imaging device and an electronic projector at the same time. . FIG. 23 is a block diagram illustrating a specific example of a system configuration when an imaging device and an electronic projector are provided simultaneously in the fifth embodiment of the display device illustrated in FIG. 22. It is a block diagram which shows the other specific example of the system configuration using 5th Embodiment of the display apparatus shown in FIG. It is a figure which shows a projection area | region when the use number of the electronic projector in 5th Embodiment of a display apparatus differs. It is a figure which shows the creation process of the projection image | video used for these electronic projectors, when six imaging devices in 6th Embodiment of the display apparatus by this invention are used and four electronic projectors are used. It is a figure which shows the creation process of the projection image | video used for these electronic projectors when one imaging device in 6th Embodiment of the display apparatus by this invention is used and four electronic projectors are used. It is a figure which shows the concept of the production method of the projection image | video in 6th Embodiment of the display apparatus by this invention. It is a flowchart which shows the production process of the projection image | video according to the resource (supply source) of the projection image | video in 5th, 6th embodiment of the display apparatus by this invention.

Explanation of symbols

1, 1a to 1d Electronic projector 2 Rotating mechanism 3, 3a Screen with viewing angle limiting filter 4 Mirror 5 Polygon mirror 5 (1) to 5 (25) Mirror constituting polygon mirror 5 6 Control unit 7 Drive circuit 8 Storage unit 13 CCD camera 14 Polygon mirror 15 Imaging object 16 Mirror 17 Imaging device 18 Communication path 19 Sensor 26a-26f Projection area 27, 27a-27d Imaging device (camera)
29a to 29d imaging area 30 imaging target 31a to 31d client 32a to 32d control processing unit 33a to 33d storage unit 34a to 34d communication unit 35 server 36 control unit 37 communication unit 38 communication path 39a to 39d display control unit 40 storage unit 41a, 41b Captured image 42a-42h Frame image

Claims (13)

A viewing angle control means, a rotatable screen;
A mirror group consisting of a plurality of mirrors arranged in a ring shape along a conical surface with the rotational axis of the screen as the central axis;
A plurality of electronic projectors arranged opposite to the mirror surfaces of the mirrors constituting the mirror group and disposed at positions for projecting different frame images representing different side surfaces of the object onto the separate mirror surfaces;
Each of the plurality of electronic projectors is arranged to project the frame image onto one or more predetermined mirrors of the mirror group,
Each of the mirrors is disposed on an optical path of an optical system in which the frame image projected from the electronic projector is reflected by the mirror surface of the mirror and projected onto the screen. In claim 1,
When the plurality of electronic projectors are arranged so as to project the frame image onto a plurality of predetermined mirrors of the mirror group, a plurality of frames that receive the frame image projection from one electronic projector. A display device, wherein the mirror is set as a set, and the tilt and position of each mirror are set for each set. In claim 1 or 2,
Each of the mirror surfaces is irradiated with the center of the frame image at its center position,
The display device, wherein the mirror surface is inclined and positioned with respect to the conical surface so that the light beam reflected at the central point of the mirror surface is irradiated to the central point of the screen. In claim 1, 2 or 3,
The electronic projector can be replaced with an imaging device, and the screen can be replaced with an imaging target.
A display device characterized in that the frame image projected from the electronic projector can be created by imaging an image of a side surface of the imaging target through the mirror group with the imaging device. In claim 1, 2 or 3,
With the same number of imaging devices as the electronic projector, the screen can be exchanged with an imaging target of the imaging device,
A display device characterized in that the frame image projected from the electronic projector can be created by imaging an image of a side surface of the imaging target through the mirror group with the imaging device. In claim 1, 2 or 3,
An imaging target, a mirror group composed of a plurality of mirrors arranged in a ring shape along a conical surface with the central axis of the imaging target as a central axis, and a mirror surface of the mirror constituting the mirror group, And an imaging device comprising an imaging device that images different side surfaces of the imaging target through the mirror surface,
A display device that acquires an image of a side surface of the imaging target imaged by the imaging device and creates the frame image projected by the electronic projector. In claim 4 or 6,
The imaging device and the electronic projector are used in different numbers,
A display device, wherein images of different sides of the imaging target are extracted from images captured by the imaging device, and frame images projected by the electronic projectors are created. In claim 7,
The number of the imaging devices used is larger than the number of the electronic projectors used, and the imaging device to be used is an imaging device having a lower resolution than the imaging device when the number is the same as the number of the electronic projectors. A display device characterized by that. In claim 7,
The number of the imaging devices used is less than the number of the electronic projectors used, and the imaging device to be used is an imaging device having a higher resolution than the imaging device when the number is the same as the number of the electronic projectors. A display device characterized by that. In claim 1, 2 or 3,
The display device, wherein the frame image projected by the electronic projector is created by computer graphics. An imaging target installation area for installing the imaging target;
A mirror group consisting of a plurality of mirrors arranged in a ring shape along a conical surface with the center of the imaging target installation area as the central axis;
A plurality of imaging devices that oppose the mirror surfaces of the mirrors that constitute the mirror group and that image different side surfaces of the imaging target viewed from the mirrors;
Each of the plurality of imaging devices is arranged to image a side surface of the imaging target viewed from one or more predetermined mirrors of the mirror group,
Each of the mirrors is disposed on an optical path of an optical system in which a side image of the imaging target is reflected by a mirror surface of the mirror and captured by the imaging device. In claim 11,
When each of the plurality of imaging devices is arranged so as to capture a side image of the imaging target viewed from a plurality of predetermined mirrors of the mirror group, a plurality of images captured by one imaging device An imaging apparatus, wherein the mirror is set as a set, and the tilt and position of each mirror are set for each set. In claim 11 or 12,
An imaging apparatus comprising: means for creating a projection video having a side image of the imaging target viewed from the mirror as a frame video from videos captured by the plurality of imaging devices.

Images