JP4843901B2 - Display device - Google Patents

Description

  The present invention relates to a display device that can be viewed from any direction and can be viewed as a stereoscopic image from a display device toward a public space such as a station or a shopping center.

Conventionally, a display device provided in a public space or the like can only be viewed from a limited direction.
Japanese Patent Application Laid-Open No. 6-301019 discloses a display device in which a single filter is provided with both a viewing angle limiting function and a heating function to minimize a decrease in luminance of the display element.

JP-A-6-301019

An object of the present invention is to provide a display device that can view different information and images depending on the viewing angle and the individual.
Another object of the present invention is to provide a display device that allows a stereoscopic image to be seen in real from the peripheral direction.
Still another object of the present invention is to provide a display device that realizes binocular stereoscopic vision without using glasses or the like.

Another object of the present invention is to provide a photographing device that captures images from a plurality of directions at a time for a subject and shoots a video for a display device, and can be used in combination with this photographing device to enable stereoscopic video communication. It is to provide a display device.
It is still another object of the present invention to provide a display device that enables an interaction such that an image changes as a viewer approaches or moves a hand.

  In order to achieve the above object, the present invention provides a display unit having a viewing angle limiting filter on a surface thereof, a rotation mechanism that rotates the display unit, and a plurality of display units that are turned by the rotation mechanism. A display device comprising control means for displaying different information or video on the display unit according to an angle direction.

  Further, the present invention provides a display unit having a viewing angle limiting filter on a surface, a rotation mechanism for rotating the display unit, a detection unit for detecting the direction of a viewer, and the display by being rotated by the rotation mechanism. And a control unit that displays information or video suitable for the direction of the viewer on the display unit when the unit faces the direction of the viewer detected by the detection unit. .

  In the invention, it is preferable that the display unit includes a screen on which information or video is projected and displayed by a display or an electronic projector. Further, the present invention is characterized in that the control means includes a storage unit for storing information or video to be displayed on the display unit.

  The present invention also provides a screen having a viewing angle limiting filter on the surface, a rotating mechanism for rotating the screen, and different information or different information depending on a plurality of angular directions to which the screen is directed by being rotated by the rotating mechanism. A display device comprising: an electronic projector that projects a projected image composed of an image onto the screen.

  The present invention also provides a screen having a viewing angle limiting filter on the surface, a rotating mechanism for rotating the screen, an electronic projector that emits a projection image composed of a plurality of different information or images, and the electronic projector. Projection optics that divides an emitted projection image into a plurality of screens for each piece of information or video, and projects the divided screen onto the screen from a plurality of angular directions that the screen faces by being rotated by the rotation mechanism. And a display device.

Further, the present invention is characterized in that a stereoscopic image is formed by the plurality of different information or videos.
The present invention further includes means for acquiring a projection image for emission from the electronic projector and storing the projection image in the storage unit, and reading out the projection image stored in the storage unit by the means to read the electronic projector. It is characterized by having provided so that it may provide.

Further, according to the present invention, the imaging apparatus includes a reflection optical system in which a plurality of mirrors are arranged in a circular shape, and an imaging device such as a camera above the center of the circle formed by the mirror group. Each mirror reflects images from a plurality of directions with respect to a subject placed inside, so that an image in which images of the subject from a plurality of directions are arranged in a circular shape can be acquired by a photographing device.
In addition, the present invention includes means for attaching a short-distance sensor or the like around the display device, acquiring a change in the sensor with the control unit, and detecting a person's position and action based on the change in the sensor. The display apparatus is configured to read the projected image from the storage unit and provide the read image to the electronic projector.

According to the present invention, it is possible to view different information or video depending on which direction the display unit is viewed.
In addition, according to the present invention, for example, when an object is displayed, it is possible to display according to the viewing direction such that when the display is viewed by turning around the back, the back side of the object can be seen. .

In addition, according to the present invention, for example, when displaying information on road guidance and passage guidance, an effect is achieved in which an intuitive display such as displaying information corresponding to the direction in which the user is facing can be performed. .
Furthermore, according to the present invention, it is possible to view a binocular stereoscopic image without using glasses or the like, and to enjoy a stereoscopic image from a 360-degree direction anywhere on the back surface while maintaining the effect. It becomes possible. Moreover, the video source obtained from the storage unit may be a moving image, and more than one person can enjoy the effect at the same time.

Embodiments of a display device according to the present invention will be described with reference to the drawings.
[First Embodiment]
First, a first embodiment of a display device for public space such as a station or a shopping center where information can be viewed from any direction according to the present invention will be described with reference to FIGS. FIG. 1 is an external perspective view showing a first embodiment of a display device according to the present invention. In the first embodiment, the display unit 1 composed of a thin display such as liquid crystal or plasma with a limited viewing angle is rotated by the rotating shaft 3 of the rotating mechanism 2 so that the screen can be seen from the direction only when the screen comes to the front. The information or video (image) to be viewed or the information or video (image) to be seen only by the person can be displayed on the display unit 1 and viewed. That is, the first embodiment is configured such that different information or video displayed on the display unit 1 can be seen depending on the viewing angle or the individual. Although FIG. 1 shows the case where the display unit 1 is configured by a thin display such as a liquid crystal or plasma with a limited viewing angle, the display unit 1 includes two pieces of the above-described display as shown in FIG. A thin display may be integrated back to back, or three or four or more thin displays may be triangular or square when viewed from the direction of the rotational drive shaft about the rotational drive shaft 3. It may be arranged in a polygonal shape or more. However, although the cost increases when the number of thin displays increases, the image can be viewed multiple times during one rotation, which improves the brightness and visibility, and even if the screen switching speed cannot be increased, such as a liquid crystal display. Even if it changes slowly, it can also prevent the appearance from getting worse. Furthermore, the rotation speed of the display unit 1 can be reduced.

In the case of a liquid crystal display, the liquid crystal display includes a liquid crystal panel and a backlight.
FIG. 2 is an overall schematic configuration diagram showing a first embodiment of a display device according to the present invention. As will be described later, a viewing angle limiting filter (viewing angle limiting optical system) is added to the surface of the display unit 1 constituted by a display such as a liquid crystal. The display unit 1 is configured to be continuously rotated by the rotation drive shaft 3 of the rotation mechanism (rotation drive source) 2. The rotation angle sensor (detection means) 4 detects the rotation angle of the display unit 1 (the angle to which the display unit 1 is directed) by detecting the rotation angle of the rotary drive shaft 3, for example. Furthermore, you may install the detection means (not shown) which detects the direction (viewer) of a viewer using infrared rays etc. The drive circuit 5 is a circuit that drives the rotation mechanism (rotation drive source) 2. The storage unit 7 stores information or an image that should be seen by a viewing angle or an individual, or information or an image that should be seen. FIG. 3 shows a cross passage in which the first embodiment is installed. It is assumed that the passage A has an emergency exit, the passage B has a staircase, the passage C has an elevator, and the passage D has a toilet. In this case, the storage unit 7 stores information shown in FIG. 4 or screens a to d displayed in accordance with the directions A to D that the display unit 1 faces.

  Further, by placing a wireless transmitter (not shown) on the control unit 6 and placing a wireless receiver (not shown) on the display unit 1, the control unit 6 displays the display detected by the rotation angle sensor 4. In accordance with the rotation angle of the unit 1 (the angle at which the display unit 1 is directed), desired information or video is selected from the storage unit 7 and read out and transmitted to the display unit 1 wirelessly in the direction in which the display unit 1 is directed. The display can be switched accordingly. Furthermore, when the control unit 6 detects that the display unit 1 is directed by the rotation angle sensor 4 in the direction of the viewer detected by the detection unit, the control unit 6 selects a desired direction corresponding to the direction of the viewer from the storage unit 7. Information or video can be selected and read out and displayed on the display unit 1. When the control unit 6 transmits desired information or video selected and read from the storage unit 7 to the display unit 1 via the rotation drive shaft 3, the rotation mechanism 2 uses a slip ring, a brush, or the like. It is necessary to use the signal transmission means.

Further, a power source such as DC to the display unit 1 may be supplied from the rotation mechanism 2 to the conductor of the rotation drive shaft 3 using a slip ring, a brush, or the like, and supplied to the display unit 1 through the conductor.
Next, as shown in FIG. 3, the relationship between the field-of-view restriction angle and the interval (light-out interval) when different screens from four directions are displayed on the display unit 1 will be described. During the interval, for example, in the case of a liquid crystal display, either a single color such as black may be displayed or the backlight may be turned off. By the way, it is necessary to prevent the two types of screens from being seen at the same time from any direction. For this purpose, first, it is necessary to provide a viewing angle limiting filter (viewing angle limiting optical system) 12 on the surface of the display 11 constituting the display unit 1 as shown in FIG. As shown in FIG. 6A, the viewing angle limiting filter 12 has a pitch of about 1 to 3 mm, which is about the size of the pixel, and a thickness of about 100 to 200 μm, depending on the viewing angle (viewing range). However, when the field-of-view restriction angle is about ± 45 degrees, the height is about 1 to 3 mm, and when the field-of-view restriction angle is about ± 22.5 degrees, the fins 121 having a light-shielding property are arranged side by side. Composed. Further, as shown in FIG. 6B, the viewing angle limiting filter 12 varies depending on the viewing angle, but when the viewing angle is about ± 45 degrees, the viewing angle is about 1 to 3 mm, and the viewing angle is ± 22. In the case of about 5 degrees, a light-shielding partition 122 having a thickness of about 50 to 100 μm and having the same function as the fin is placed in a transparent film or transparent substrate 123 having a thickness of about 2 to 5 mm, which is about the size of a pixel. It may be configured to be inserted at a pitch of about 3 mm.

  As shown exaggeratedly in FIGS. 7 (a) and 7 (b), when the screen of the display 11 is viewed by a person, the angle increases from the center toward the periphery. It is necessary to add a little to avoid shadows. FIG. 7A shows a case where a person views the screen of the display 11 from the front, and FIG. 7B shows a case where the person views the screen of the display 11 when the display 11 is slightly rotated. In addition to this, the viewing angle limiting filter 12 may be a method of arranging a cylindrical lens that collects light in the viewing angle limiting direction.

  Furthermore, as shown in FIG. 8 and FIG. 9, in order to prevent two types of screens from being seen at the same time from any direction, an interval that is almost the same as the visual field limit angle (light-off section or video is not displayed). It is necessary to provide a bright section. In the light-off section, information or video displayed on the screen of the display 11 needs to display a single color such as black over the entire surface, or a liquid crystal display or the like to turn off the backlight. It is necessary to make it black (in the case of single-sided display on the display) so that it cannot be seen. In this way, a person in a certain direction can see only information or a video from that direction in a state where there is no moving object and there is no sense of incongruity.

  FIG. 8 shows a case where the viewing angle limit of the viewing angle limiting filter 12 is about ± 22.5 degrees when the display unit 1 is viewed from four directions. In order to make the visible range of each of the screens a, b, c, and d shown in FIG. If it has about 22.5 degrees, as shown in FIG.8 (b), it is necessary to make a light extinction area about 45 degrees. That is, when the display unit 1 rotates and the front of the display unit 1 is positioned at both ends of the display section, the viewing angle is about ± 22.5 degrees. In this case, each of the screens a, b, c, and d displays a section of about ± 22.5 degrees.

  FIG. 9 shows a case where the viewing angle limit of the viewing angle limiting filter 12 is about ± 45 degrees when the display unit 1 is viewed from four directions. In order to make the visible range of each of the screens a, b, c, and d shown in FIG. If it has 45 degrees, it is necessary to make a light extinction section about 90 degrees as shown in FIG. That is, when the display unit 1 rotates and the front of the display unit 1 is positioned at both ends of the display section, the viewing angle is about ± 45 degrees. In this case, each screen a, b, c, d is displayed for a moment.

  As described above, the viewing angle limiting filter 12 is provided on the surface of the display 11, and the extinguishing section or the non-displaying section is provided according to the viewing angle of the viewing angle limiting filter 12. This screen can be made invisible, and for example, a guidance display as shown in FIG. 4 can be displayed.

  Next, the control of the first embodiment will be described with reference to FIG. First, when started, the rotation angle sensor 4 detects the rotation angle of the display unit 1 rotated by the rotation mechanism 2 (step S101), and the control unit 6 stores the storage unit 7 according to the detected rotation angle of the display unit 1. Reference is made to the rotation angle-video database stored in (Step S102), information or video corresponding to the rotation angle is read out, transmitted to the display unit 1, and driven and displayed by the IC drive circuit in the display unit 1, Further, by displaying a single color such as black in the extinction section or controlling the backlight drive circuit to extinguish the backlight (step S103), and repeating this in step S104, as shown in FIG. From each direction, different information or images different from each other are displayed.

  In particular, if the display unit 1 is a display that can display 60 frames per second on one side, for example, when the four-way display is turned off or not displayed at 45 degrees, the turn-off section is executed with the backlight turned off. Since the image only needs to be changed four times by rotation, a display of 15 times / second can be realized. Also, considering that the light is turned off as one image, the image is changed 8 times per rotation, so that it is displayed 7.5 times / second in each direction. Furthermore, if a display capable of high-speed display is used, it is possible to increase the number of displays per second in each direction by increasing the number of rotations per second. In addition to stationary information or video, moving images can also be displayed. In the first embodiment, display in four directions at equal intervals has been described. However, the display need not be at equal intervals, and different images can be displayed in more directions.

  By the way, if the center of the screen of the display unit 1 is placed at the axis of the rotary drive shaft 3, the center of the screen can be made almost stationary. However, as the display unit 1 rotates, the center of the screen increases as it goes to the periphery of the screen. Will move. Therefore, if a plurality of information or images from which a stationary information or video can be obtained from the front even if the display unit 1 rotates within a certain angle range is created and stored in the storage unit 7, the stationary information or video is obtained. It will be seen. For the same reason, if the display device can provide sufficient brightness, the lighting time can be shortened as much as possible to make the display appear to be stationary.

[Second Embodiment]
Next, a second embodiment of a display device that allows a stereoscopic image to be seen by going around the present invention according to the present invention will be described with reference to FIGS.

  FIG. 12 is a diagram illustrating the principle of the second embodiment of the display device. The principle of the second embodiment is that the screen (display unit) 20 with a viewing angle limiting filter is rotated continuously or stepwise, and an electronic projector 21 using a liquid crystal or the like around it and an imaging optical system (CCD camera). ) A plurality of combinations with 22 (for the number of frames to be divided) are installed, and the electronic projector 21 installed in each angle direction corresponds to each angle read from, for example, the storage unit 31 shown in FIG. By projecting the projected images Ga to Gp of FIG. 17, the same image as when the object is present from an arbitrary position around the screen 20 with the viewing angle limiting filter as if the object is present is obtained. It was made visible.

  When a projected image is captured by the imaging optical system (CCD camera) 22, a three-dimensional object 35 is placed at a position where the screen 20 is installed, and each of the plurality of imaging optical systems 22 installed around the object 35. For example, the image may be stored in the storage unit 31 shown in FIG. If the object is stationary, the image may be a still image, and if it is moving, a moving image may be stored.

  In the principle diagram of the second embodiment described above, installing a plurality of electronic projectors 21 around the rotating screen 20 is more complicated and larger than another embodiment described later. Image quality is improved. In addition, each optical system has a light source and can produce sufficient brightness, so the screen turns on only for a moment when it comes to the front of the optical system (otherwise, it turns off or displays a single color such as black), making it clearer. Can be displayed. In that case, means for detecting the angle of the screen (not shown) is required.

  Then, next, another second embodiment will be described with reference to FIGS. FIG. 13 is an external perspective view showing a second embodiment of the display device. The screen 20 with the viewing angle limiting filter is rotated continuously or stepwise by a rotation mechanism (rotation drive source) 23. Reference numeral 25 denotes a cylindrical inner polygonal mirror (mirror group) arranged in a cylindrical shape. Reference numeral 26 denotes a frustoconical outer polygon mirror (mirror group). These 25 and 26 form a projection optical system. 27 is a liquid crystal or the like for projecting the video (video obtained by arranging the divided frame images when the object is viewed in the ring area in the circumferential direction) Ga to Gp based on the input video data shown in FIG. This is an electronic projector using As shown in FIG. 14, the overall control unit 28 is projected by a drive circuit 29 for driving the rotation mechanism 23, a control unit 30 for controlling the drive circuit 29 and the electronic projector 27, and the electronic projector 27. It is comprised from the memory | storage part 31 which memorize | stored the three-dimensional frame image Ga-Gp. By the way, a series of data of the three-dimensional frame images Ga to Gp to be stored in the storage unit 31 may be arbitrarily created by computer graphics or the like, or may be imaged by a CCD camera or the like as will be described later. In the case of imaging with a CCD camera, it is possible to receive and store a stereoscopic image from a remote location.

  With the above configuration, the control unit 30 reads out, for example, the video data shown in FIG. 15 from the storage unit 31 and transmits it to the electronic projector 27. The electronic projector 27 displays the received video data on a liquid crystal or the like, and emits the displayed video to be projected on the screen 20. The emitted light of each frame image Ga to Gp divided in the ring area is reflected by each mirror surface of the outer polygonal mirror 26 having a truncated cone shape and further reflected by each mirror surface of the inner polygonal mirror 25 having a cylindrical shape. For example, as shown in FIG. 16, the frame images Ga to Gp shown in FIG. 17 are projected onto the screen 20 from the directions a to p. The rotating screen 20 has a field-of-view angle (visible range) of ± about 5.6 degrees (for 16 frames: 360 degrees / (16 × 4)) with respect to the normal line on both surfaces of the screen plate member 20a. ) Having a viewing angle limiting filter (viewing angle limiting optical system) 20b (shown in FIG. 20), the adjacent frame image to be projected is shielded from each direction a to p as shown in FIG. Thus, the frame image is displayed and can be seen. As a result, the three-dimensional images Ga to Gp of the object shown in FIG. 17 can be displayed and viewed by going around the circumferential directions a to p. If this method is used, there is an effect that a plurality of people can enjoy video simultaneously from an arbitrary direction. On the other hand, for example, in the case of 16 frames per rotation, 31/32, that is, 97% of the time is not displayed.

  Therefore, the direction a to p of the viewer is detected by detection means (not shown) such as infrared rays, or a radio signal indicating the direction a to p generated by a remote operation of the viewer (such as a remote switch) is detected and controlled. The unit 30 may be controlled to drive the rotation mechanism 23 via the drive circuit 29 so that the front of the screen 20 is always directed toward the viewer. In order for the control unit 30 to perform rotational drive control so that the front of the screen 20 is directed toward the viewer, it is necessary to detect the rotational angle of the screen 20 with a rotational angle detection sensor (not shown). At this time, if the viewer moves around the periphery, the control unit 30 controls the rotation so that the front of the screen 20 faces the viewer according to the movement. By doing in this way, the viewer can see the frame image projected on the screen 20 from the front while being always displayed.

  In addition, if only the frame image in the direction in which the viewer 30 is positioned is projected from the electronic projector 27 onto the screen, the viewing angle limiting filter 20b can be eliminated. In addition, when a plurality of people try to see, the screen is basically rotated, but it may be rotated stepwise so as to make the time facing the front of each viewer a little longer. Also, a method of displaying only the moment when the screen comes to the front is conceivable so that the image projected from each direction does not appear to flow. In that case, the projector lamp may be switched to a type that emits flash light, or light may be blocked by a shutter (not shown) except for the moment when the screen comes to the front. In any method, the moment of turning to the front direction of each image can be detected by means for detecting the rotation angle of the screen (not shown).

  As shown in FIGS. 19 and 20, the viewing angle limiting filter 20b has a pitch of about 0.5 to 2 mm, a thickness of about 100 to 200 μm, and changes according to the viewing angle (visible range). When the viewing angle is about ± 5.6 degrees (16 frames), the height is about 5 to 20 mm. When the viewing angle is about ± 9.0 degrees (10 frames), the height is 3.2. The fins 211 having a light shielding property of about ˜13 mm are arranged side by side. The viewing angle limiting filter 20b varies depending on the viewing angle, but when the viewing angle is about ± 5.6 degrees (16 frames), the viewing angle is about ± 20 mm. In the case of about 10 degrees (in the case of 10 frames), a light shielding film with a thickness of about 50 to 200 μm that plays the same role as the fin in a transparent film or transparent substrate (not shown) with a thickness of about 1.9 to 13 mm. Partitions (not shown) may be inserted at a pitch of about 0.3 to 2 mm. In addition, a method of arranging a cylindrical lens that condenses light in the viewing angle limit direction may be used.

  Next, a method for creating the frame images Ga to Gp shown in FIG. 15 will be described with reference to FIG. That is, the means (apparatus) for acquiring the frame images Ga to Gp is provided with a switching mirror 37 and an imaging optical system (CCD camera) 36 in the apparatus shown in FIG. First, the screen 20 with the viewing angle limiting filter is removed from the rotating mechanism 23, and the object 35 is placed at the position of the screen 20 with the viewing angle limiting filter. Then, for example, as shown in FIG. 16, a frame image obtained from the stationary object 35 in each of the directions a to p is reflected by each mirror surface of the cylindrical inner polygonal mirror 25, and further a truncated cone-shaped outer polygon. Reflected by each mirror surface of the mirror 26, reflected by the switching mirror 37 and imaged by the CCD camera 36, frame images Ga to Gp shown in FIG. 17 are obtained and stored in the storage unit 31. That is, each frame image is obtained by each mirror surface of the cylindrical inner polygonal mirror 25 or each mirror surface of the frustoconical outer polygonal mirror 26. The object may be moving and can be recorded as a moving image.

  Further, when the CCD camera 36 captures the frame images Ga to Gp from the surroundings a to p with respect to the object 35, for example, when illumination is necessary, a half mirror (see FIG. If the half mirror is irradiated with illumination light from an illumination light source, the object 35 is illuminated from each direction ap.

  Of course, when each frame image Ga to Gp is projected and displayed on the rotating screen 20, the object 35 is removed, the screen 20 is attached to the rotating mechanism 26, and the switching mirror 37 is switched and started. .

  As described above, the frame images Ga to Gp can be captured by the CCD camera 36 having the same viewing angle as that of the electronic projector 27. As a result, the captured frame image becomes an image that can be used as it is by the electronic projector 27, and a small and inexpensive system can be realized. It is also possible to transmit and receive a stereoscopic image by using two of these systems, setting one as a camera and the other as an electronic projector, and transmitting the captured image.

[Third Embodiment]
Next, a third embodiment of binocular stereoscopic vision will be described with reference to FIG.
As shown in FIG. 23 (a), when the display of the first embodiment or the screen of the second embodiment is viewed with both eyes at an arbitrary position, the viewing angle of the left and right eyes adjacent to each other is restricted. If it is configured such that images from different angles can be seen, binocular stereoscopic vision can be realized as shown in FIG. 23B without using glasses or the like. That is, considering that the distance between the left and right eyes is 6 to 7 cm, the angle from both eyes is about 6 to 7 degrees when considered at a position about 30 cm away from the center of the screen, and is about 25 to 30 divisions (frame number). Therefore, the viewing angle limiting filter can be realized with a viewing angle limit of about 3 to 3.5 degrees or less.

According to the third embodiment described above, stereo viewing is possible by improving the angular resolution to such an extent that different images can be seen by the left and right eyes, and binocular stereoscopic viewing is possible without using glasses or the like. This makes it possible to view the video that has been lifted up and enjoy the stereoscopic video from the 360 degree direction anywhere on the back surface while maintaining the effect. In addition, the video source obtained from the storage units 7 and 31 may be a moving image, and more than one person can enjoy the effect at the same time.
In addition, when a frame image is created under the above conditions using the system for capturing an object image with the camera according to the second embodiment, the above three-dimensional image can be easily captured and easily reproduced. It becomes possible.

[Fourth Embodiment]
Next, a fourth embodiment of a display device capable of viewing a stereoscopic image by going around the periphery according to the present invention will be described with reference to FIGS. 15 to 20 and FIGS.
FIG. 24 is an external perspective view showing a fourth embodiment of the display device. The screen 39 with a viewing angle limiting filter is rotated continuously or stepwise by a rotation mechanism (rotation drive source) 41. Reference numeral 40 denotes an inner polygonal mirror (mirror group) arranged in a cylindrical shape, and 38 denotes a mirror attached to the back surface of the top plate of the display device. These 38 and 40 form a projection optical system. 42, for example, an image based on the input image data shown in FIG. 15 (an image in which divided frame images are arranged in the ring region when the object is viewed in the ring area in the circumferential direction) Ga to Gp, etc. This is an electronic projector used.

  FIG. 25 is an overall schematic configuration diagram showing a fourth embodiment of the display device. A drive circuit 44 that drives the rotation mechanism 41, a control unit 43 that controls the electronic projector 42, and a storage unit 45 that stores the three-dimensional frame images Ga to Gp projected by the electronic projector 42. By the way, a series of data of the three-dimensional frame images Ga to Gp stored in the storage unit 45 may be arbitrarily created by computer graphics or the like, or may be captured by a CCD camera or the like as will be described later. In the case of imaging with a CCD camera, for example, video data shown in FIG. 15 can be received and stored from a remote location.

  With the above configuration, the control unit 43 reads out, for example, the video data shown in FIG. 15 from the storage unit 45 and transmits it to the electronic projector 42. The electronic projector 42 emits the received video data for projection onto the screen 39. The emitted image is reflected by the top plate rear surface mirror 38 of the display device, and further reflected by each mirror surface of the cylindrical inner polygonal mirror 40. For example, as shown in FIG. Each frame image Ga to Gp shown in FIG. 17 is projected onto the screen 39.

  For the rotating screen 39, in addition to the method shown in FIG. 20, a method using a directional reflecting screen material as described in JP-A-11-258697 can be considered. FIG. 26 is a configuration diagram of the screen 39 when a directional reflective screen material is used. FIG. 27 is a configuration diagram of the directional reflection screen material 46. The directional reflection screen material 46 includes a corner mirror sheet 46a and a lenticular sheet 46b. The directional reflector screen 46 has a characteristic of retroreflecting in the horizontal direction and diffusely reflecting in the vertical direction with respect to incident light, and has been incident on light having an incident angle within ± 45 degrees. Reflects light in the direction. That is, the viewer can see the same image while the directional reflector screen 46 rotates within a range of ± 45 degrees to the left and right from the position facing the viewer. Therefore, the screen configuration method using a directional reflector has a larger range of incident angles that can be reflected than that shown in FIG. As a result, it looks brighter than the screen of FIG.

  However, depending on the incident angle of light, the light may be reflected in a direction different from the incident direction. As a result, depending on the viewing direction, images from a plurality of directions may appear to overlap each other. Therefore, a viewing angle limiting filter 47 (shown in FIG. 26) is used in order to prevent such reflected light from other directions and allow a viewer to view an image corresponding to the direction. The viewing angle limiting filter 47 has a structure in which fins are arranged at a fine pitch in the same manner as the viewing angle limiting filter shown in FIGS. By attaching a viewing angle limiting filter (viewing angle limiting optical system) 47 having a viewing angle limit (visible range) of ± about 24 degrees with respect to the normal to the surface of the directional reflector screen 46, for example, The reflected light from the image is shielded, and the frame image can be displayed and viewed from each direction ap as shown in FIG. As a result, it is possible to display and view the stereoscopic images Ga to Gp of the object shown in FIG. 17 by circulating in the circumferential directions a to p, and there is an effect that a plurality of people can enjoy the images simultaneously from arbitrary directions. . Also, a double-sided screen can be made by adhering two directional reflector screens back to back and pasting a lenticular sheet and a viewing angle limiting filter on both sides. When a double-sided screen is used, unlike a single-sided screen, the image projected from a mirror in one direction is reflected by the two front and back screens, so the time that the image can be viewed while the screen rotates once Becomes longer.

  FIG. 28 shows a configuration diagram of a display device having a projection optical system different from the configuration method of the display device shown in FIG. The configuration of the screen 51 with a viewing angle limiting filter, the electronic projector 48, the rotation mechanism 50, the control unit 49 for controlling the electronic projector 48, the cylindrical inner polygon mirror 52, etc. is the same as above, but the electronic projector 48 Is fixed to the ceiling, and a rotating mechanism 50 and a screen 51 are installed below the vertical direction. The image emitted from the electronic projector 48 is reflected by each mirror surface of the cylindrical inner polygonal mirror 52, and each frame image Ga-Gp shown in FIG. 17 from each direction a-p as shown in FIG. Is projected onto the screen 51.

  In both the display devices of the fourth embodiment and the second embodiment, a plurality of people can simultaneously enjoy a stereoscopic image from an arbitrary direction, but in the second embodiment, a cylindrical inner polygon Adjustment must be made so that each of the mirror groups and each of the frustoconical outer polygon mirror groups face each other. In the fourth embodiment, there is no need for adjustment, and it is considered that errors due to subtle deviations such as the position and orientation of the mirror can be reduced. In the second embodiment, since it is not necessary to install anything above the screen, it is considered highly effective that the image feels as if it floats there. Since a certain size is required, the appearance is larger than that of the fourth embodiment, and there is a feature that there is a distance between the viewer and the screen.

  In the above description, the electronic projector is installed below the rotation axis of the screen and projected upward. However, for the sake of easy understanding, these vertical positions are defined by the rotation axis and image. It is used in relation to the position where it is formed, and is not limited to, for example, the positional relation with the floor or ceiling of the installation location of the display device, and may be upside down.

[Fifth Embodiment]
Next, a method for creating the frame images Ga to Gp shown in FIG. 15, that is, a fifth embodiment of an imaging apparatus that can capture images from a plurality of directions at once for an object that is a subject. This will be described with reference to FIGS. 16 and 29 to 31. FIG. 29 is a diagram illustrating the principle of the embodiment of the imaging apparatus. The cylindrical inner polygonal mirror 55 is arranged in a circle like the cylindrical inner polygonal mirror 40 described in the fourth embodiment. An imaging optical system (CCD camera) 53 is installed above the cylindrical inner polygon mirror 55 in the vertical direction, and an object to be imaged (object 54) is placed inside the circle of the cylindrical inner polygon mirror. Then, for example, a frame image obtained in each of the directions a to p as shown in FIG. 16 with respect to the object 54 is reflected by each mirror surface of the cylindrical inner polygonal mirror 55 and captured by the CCD camera 53, for example. An image as shown in FIG. 15 is obtained. The image captured by the CCD camera 53 may be a still image or a moving image.

  FIG. 31 is a configuration diagram of an apparatus that captures an image of a person's whole body. As the configuration of the apparatus shown in FIG. 31, a cylindrical inner polygon mirror 64, a CCD camera 63, and a ceiling back mirror 62 are provided, and a person to be photographed enters the circle inside the cylindrical inner polygon mirror 64. . Then, for example, a frame image obtained in each of the directions a to p as shown in FIG. 16 is reflected by each mirror surface of the cylindrical inner polygonal mirror 64 and further reflected by the ceiling back surface mirror 62 and imaged by the CCD camera 63. To do. In this case, the object to be photographed is not limited as long as it falls within the cylindrical inner polygonal mirror 64, and a plurality of objects may be included.

FIG. 30 shows a configuration diagram of real-time stereoscopic video communication between the CCD camera 53 and the electronic projector 61 of the display device in the above photographing apparatus. Real-time stereoscopic video communication can be performed by transmitting video captured by the CCD camera 53 from the communication unit of the imaging device to the projector 61 by the NTSC / PAL system or the like. This communication may be performed by wire or wirelessly. It is also possible to transmit the acquired video to a remote location via a network and display it at a remote location using the display device.
At this time, if the photographed video is a moving image, it can be displayed as a moving image.

  Furthermore, if the principle of the present photographing apparatus is used, it is possible to make a photographing system having a size corresponding to the subject to be photographed. That is, by setting the size of each of the cylindrical inner polygonal mirrors and the diameter of the circle on which the mirror is arranged in accordance with the size of the subject, it is possible to make an imaging device corresponding to the imaging target. Also, the height of the CCD camera is adjusted so that an image can be captured in which the entire cylindrical inner polygonal mirror as shown in FIG.

[Sixth Embodiment]
Next, a sixth embodiment of the interaction function of the display device according to the present invention will be described with reference to FIGS.
FIG. 32 is an external perspective view of a display device that enables interaction. As shown in FIG. 32, it is possible to detect that a person is approaching by installing a plurality of short-range sensors or the like around the display device or using a mat switch on the floor surface. Further, as a means for detecting the directions a to p of the viewer (shown in FIG. 16), only the number of directions (for example, 16 of a to p) in which infrared rays, short-range sensors, microphones, and the like are to be detected may be used. Good. At this time, an approximate movement of the viewer can be detected from a change in the signal obtained from the adjacent sensor.

  Signals obtained from the sensors 65 are processed by the control unit 66, and the control unit 66 transmits an image corresponding to the movement of the viewer to the electronic projector 67. For example, it is possible to perform an interaction such as detecting the direction in which a person is approaching from a change in signals of sensors and rotating the character projected on the screen so as to face the person. At this time, as a method of creating a video in which the character rotates, the control unit 66 stores the frame images Ga to Gp shown in FIG. 17, and for example, when the image shown in FIG. By projecting the images Ga to Gp shifted by one frame or several frames in the circumferential direction, it is possible to make a motion as if the character is rotating. Information on the direction indicating which of the frame images is the front may be stored in advance, and control may be performed so that the front image is formed in the direction in which it is detected that there is a person.

  Further, interaction such as changing the direction of the character according to the direction in which the human hand moves or the movement is also possible from the signal change of the adjacent sensor. Furthermore, by attaching a plurality of sensors, it is also possible to detect the approach and movement of a plurality of people and produce a video corresponding to this.

[Seventh Embodiment]
Next, a seventh embodiment of a semi-cylindrical display device capable of viewing stereoscopic images according to the present invention will be described with reference to FIGS. 15 to 17 and FIGS. 33 to 35.
FIG. 33 is an external perspective view of a semi-cylindrical display device according to a seventh embodiment. FIG. 34 is an overall schematic side view showing a seventh embodiment of the display device. The screen 69 with a viewing angle limiting filter is rotated continuously or stepwise by a rotation mechanism (rotation drive source) 70. 73 is an inner polygonal mirror (mirror group) arranged in a semi-cylindrical shape, and 68 is a mirror attached to the back of the top plate of the display device. These 68 and 73 form a projection optical system. Reference numeral 71 denotes an electronic projector that projects the video data shown in FIG. 35, for example. Reference numeral 72 denotes a control unit that stores the video data and transmits the video data to the electronic projector 71.

  FIG. 35 is an image in which divided frame images Gb to Gi (shown in FIG. 17) when an object is viewed in the ring area are arranged in a semicircular direction in the circumferential direction. 35 may be arbitrarily created by computer graphics or the like, or may be imaged by a CCD camera or the like as in the method described in the fifth embodiment.

  With the above configuration, the control unit 72 reads out the video data shown in FIG. 35, for example, and transmits it to the electronic projector 71. The electronic projector 71 emits the received video data for projection onto the screen 69. The light of each of the frame images Gb to Gi divided in the emitted ring region is reflected by the top plate rear surface mirror 68 and further reflected by each mirror surface of the inner polygonal mirror (mirror group) 73 disposed in the semi-cylindrical shape. Then, for example, each frame image Gb to Gi is projected onto the screen 69 from each direction of b to i shown in FIG. The rotating screen 69 is a screen having a property of transmitting an image projected from the rear side. A screen having a viewing angle limit in the horizontal direction and a wide viewing angle range in the vertical direction is desirable so that different images can be seen depending on the viewing direction. Therefore, a transflective film or the like used in a rear projection display is used.

  As a method for realizing the screen 69, a method using a Fresnel lens can be considered. FIG. 36 is a side view of the Fresnel lens showing the characteristics of the Fresnel lens. A Fresnel lens is a lens having a curved lens surface that is stepped rather than continuous, and has a feature that refracts light rays at a stepped portion as shown in FIG. 36 and collects transmitted light in the same direction as the incident direction of light. Further, the viewing angle of the Fresnel lens is different depending on the existing products, but there is also a lens having a wide viewing angle of ± about 60 degrees. When this Fresnel lens is used, the light is transmitted in the same direction as the direction in which the light is incident and condensed at a certain position, so that the viewer can see each mirror of the inner polygonal mirror 73 disposed in the semi-cylindrical shape. From a certain position on a straight line connecting the Fresnel lens screen, you can see the image reflected on the mirror. That is, by using the Fresnel lens, it is possible to realize an effect that an image corresponding to the viewing direction can be seen similarly to the retroreflection described in the fourth embodiment.

  Further, while the Fresnel lens screen angle is within a certain range (within the viewing angle range) from the angle facing the viewer, the image projected on the screen can be viewed. FIG. 37 shows two types of Fresnel lenses. 74a is the most common Fresnel lens and has a concentric curved cut. Since the lens 74a condenses in both the horizontal direction and the vertical direction, when it is used as the screen 69 of the display device in the seventh embodiment, the image reflected by each mirror of the inner polygon mirror 73 is horizontal. It can be seen only from the range of the viewing angle of the Fresnel lens in the vertical direction. Therefore, it is considered that the use of a Fresnel lens having a stepped cut only in the horizontal direction as in 74b is suitable as a material for the screen 69 because the light is condensed only in the horizontal direction.

  Further, in order to suppress the light collection in the vertical direction and make the image visible from a wider range, it may be processed so as to be diffusely reflected in the vertical direction. FIG. 38 is a configuration diagram for causing the Fresnel lens to have diffuse reflection in the vertical direction. By attaching a lenticular sheet 75 similar to the lenticular sheet 46b shown in FIG. 27 to the surface of the Fresnel lens, diffuse reflection in the vertical direction can be realized. As a result, the entire screen can be seen in the vertical direction with a more uniform brightness, making it easier to see.

  FIG. 39 is a configuration diagram (viewed from above) of the screen 69 when a Fresnel lens is used. A lenticular sheet 75 for diffuse reflection shown in FIG. 38 is attached to the Fresnel lens. Further, in order to limit the viewing angle, a fin is attached to limit the target viewing angle in the same manner as the viewing angle limiting filter shown in FIG. 20, or it is also used in a liquid crystal screen of a PC or a mobile phone. A method using a viewing angle limiting filter is conceivable.

  In the method of the seventh embodiment described above, unlike the first, second, and fourth embodiments, an image projected from the back is seen, so directly on the edge of the fin of the viewing angle limiting filter, The light is no longer hit and the flicker is reduced. As a result, an image with clear contrast can be seen. Further, in the seventh embodiment, it is not possible to go around the entire circumference, but it is possible to see from the side where the inner polygon mirror is not installed. Therefore, it can be seen closer to the screen than the all-round type. Further, in the cylindrical display devices as in the first, second, and fourth embodiments, in order to enlarge the image displayed on the screen and the screen, it is necessary to enlarge the entire device. There is also a problem that the distance between and will also increase. However, in the seventh embodiment, even if the device itself is enlarged, the distance between the screen and the viewer is not affected.

  Further, regarding the image projected from the electronic projector, in the first, second, and fourth embodiments, an image in which the frame images Ga to Gp (for example, 16 frames) are arranged in a ring shape as shown in FIG. It was projected by a projector. However, in the seventh embodiment, an image in which frame images (for example, 8 frames) are arranged in a semicircular shape as shown in FIG. 35 is projected. When the resolution of the image projected from the electronic projector is the same, the number of necessary frame images is halved in the seventh embodiment. Therefore, the resolution of each frame image projected from the electronic projector in the seventh embodiment is about four times the resolution of each frame image projected in the first, second, and fourth embodiments. As a result, the expressive power of the image is improved.

  In the above seventh embodiment, the embodiment in which the inner polygon mirror is disposed in the semi-cylindrical shape has been described, but the cylinder in which the mirror is disposed may be more than 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. Further, it is possible to provide a cylindrical display device of the entire circumference as in the second and fourth embodiments by using a screen that has light transmittance and can suppress reflection.

1 is an external perspective view showing a first embodiment of a display device according to the present invention. 1 is an overall schematic configuration diagram showing a first embodiment of a display device according to the present invention. It is explanatory drawing of the guidance in a channel | path. It is a figure for demonstrating the guidance screen displayed on a display part. It is a figure which shows the viewing angle restriction | limiting filter provided in the surface of the display. (A), (b) is a perspective view which shows the specific Example of the viewing angle limiting filter provided in the surface of the display, respectively. It is a figure which exaggerates and shows the case where a slight inclination is given as it goes to the periphery in a viewing angle restriction filter, (a) shows the case where a person looks at the screen of a display from the front, (b) shows the display slightly It is a figure which shows the case where a person looks at the screen of a display when rotating. It is explanatory drawing in case a visual field restriction angle is about +/- 22.5 degree | times, (a) is a figure which shows it, (b) is a figure which shows a display area and a light extinction area, (c) is a screen ad It is a figure which shows a visible range. It is explanatory drawing in case a visual field restriction angle is about +/- 45 degree | times, (a) is a figure which shows it, (b) is a figure which shows a display area and a light extinction area, (c) is the visible range of screen ad FIG. It is a figure which shows the control flow in 1st Embodiment of the display apparatus which concerns on this invention. It is a figure which shows the display part which integrated the display with two viewing angle limiting filters back-to-back. It is a principle figure which shows 2nd Embodiment of the display apparatus which concerns on this invention. It is an external appearance perspective view which shows 2nd Embodiment of the display apparatus which concerns on this invention. It is a whole schematic block diagram which shows 2nd Embodiment of the display apparatus which concerns on this invention. It is a figure which shows 16 frame images projected on the rotating screen from an electronic projector. It is a figure which shows the surrounding 16 directions ap projected on the rotating screen. It is a figure which shows 16 frame images Ga-Gp used as a three-dimensional image by going around. It is explanatory drawing of a visual field restriction | limiting angle. It is a figure explaining the screen with a viewing angle restriction filter. It is a perspective view which shows one Example of a screen with a viewing angle restriction | limiting filter. It is an external appearance perspective view which shows the means to acquire a frame image in 2nd Embodiment of the display apparatus which concerns on this invention. It is a whole schematic block diagram which shows the means to acquire a frame image | video in 2nd Embodiment of the display apparatus which concerns on this invention. It is a figure for demonstrating 3rd Embodiment of the binocular stereoscopic vision which concerns on this invention. It is an external appearance perspective view which shows 4th Embodiment of the display apparatus which concerns on this invention. It is a whole schematic block diagram which shows 4th Embodiment of the display apparatus which concerns on this invention. It is a whole schematic block diagram which shows another Example of the screen with a viewing angle limiting filter. It is a perspective view which shows the structure of a directional reflective material screen. It is an external appearance perspective view which shows another embodiment of the display apparatus which concerns on this invention. It is an external appearance perspective view which shows 5th Embodiment of the imaging device which concerns on this invention. 1 is an overall schematic configuration diagram showing an embodiment of a stereoscopic video communication apparatus according to the present invention. It is an external appearance perspective view which shows other embodiment of the imaging device which concerns on this invention. It is an external appearance perspective view which shows embodiment of the interaction function in the display apparatus which concerns on this invention. It is an external appearance perspective view which shows other embodiment of the display apparatus which concerns on this invention. It is a whole schematic side view which shows other embodiment of the display apparatus which concerns on this invention. It is a figure which shows 12 frame images projected on the screen rotated from an electronic projector in 7th Embodiment of the display apparatus which concerns on this invention. It is a figure for showing the characteristic of a Fresnel lens. It is a figure for showing the kind of Fresnel lens. It is a block diagram for implement | achieving a vertical direction diffuse reflection using a Fresnel lens. It is a whole schematic side view of the screen in 7th Embodiment of the display apparatus which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Display part (display with a viewing angle restriction filter), 2 ... Rotation mechanism (rotation drive source), 3 ... Rotation drive shaft, 4 ... Rotation angle sensor (angle detection means), 5. ..Drive circuit, 6 ... control unit, 7 ... storage unit, 11 ... display, 12 ... viewing angle limiting filter, 121 ... fin, 122 ... light shielding partition, 123 ... -Transparent film or transparent substrate, 20 ... display unit (screen with viewing angle limiting filter), 21 ... electronic projector, 22 ... CCD camera, 23 ... rotating mechanism, 25 ... cylindrical , Inner polygonal mirror, 26... Frustoconical outer polygonal mirror, 27... Electronic projector, 28... Overall control unit, 29... Drive circuit, 30. ... Storage unit, 36 ... CCD 37, switching mirror, 38 ... mirror on the back of the top plate, 39 ... display (screen with viewing angle limiting filter), 40 ... cylindrical inner polygonal mirror, 41 ... Rotation mechanism (rotation drive source), 42 ... electronic projector, 43 ... control unit, 44 ... drive circuit, 45 ... storage unit, 46 ... directional reflector screen, 46a ... Corner mirror sheet, 46b ... lenticular sheet, 47 ... viewing angle limiting filter, 48 ... electronic projector, 49 ... control unit, 50 ... rotating mechanism, 51 ... display unit ( Screen with viewing angle limiting filter), 52 ... cylindrical inner polygon mirror, 53 ... CCD camera, 54 ... object (subject), 55 ... cylindrical inner polygon mirror, 56. ..Heaven Back mirror, 57... Display unit (screen with viewing angle limiting filter), 58... Cylindrical inner polygon mirror, 59... Rotating mechanism (rotation drive source), 60. ... Electronic projector, 62 ... Top plate rear surface mirror, 63 ... Photographing equipment (CCD camera), 64 ... Cylindrical inner polygonal mirror, 65 ... Sensors (Infrared short-range sensor) Etc.), 66... Control unit, 67... Electronic projector, 68... Mirror on the top plate, 69... Display unit (screen with viewing angle limiting filter), 70. Drive source), 71 ... electronic projector, 72 ... control unit, 73 ... semi-cylindrical inner polygon mirror, 74 ... Fresnel lens, 75 ... lenticular sheet, 76 ... field of view Angular limit filter .

Claims (8)

  A screen, an electronic projector, a rotating mechanism for rotating the screen, a top-like mirror installed on a plane perpendicular to an extension line of the rotating shaft of the rotating mechanism, and rotation of the screen and the rotating mechanism A plurality of cylinders arranged in a cylindrical shape so as to surround the axis, and arranged non-parallel to the extension line of the rotation axis so that an image emitted from the electronic projector reflected by the top mirror can be projected onto the screen. And a projection mirror group comprising a pair of mirrors. The display device according to claim 1,
The image includes a plurality of images different from each other according to a plurality of angular directions toward the screen, and the plurality of different images are projected onto the screen through a plurality of mirrors of the projection mirror group, thereby providing a three-dimensional image. A display device that forms an image.   The display device according to claim 1, wherein the screen is formed of a directional reflective screen.   The display device according to claim 1, wherein the screen is a transflective screen.   5. The display device according to claim 4, wherein the projection mirror group is composed of a plurality of mirrors installed in a part of the angular direction in the cylindrical shape. The display device according to claim 3,
The display device is characterized in that the directional reflection screen has a characteristic of retroreflecting in the horizontal direction and diffusely reflecting in the vertical direction with respect to incident light. An imaging unit, and an image reflection mirror group including a plurality of mirrors arranged in a cylindrical shape so as to surround the subject;
A top plate mirror installed on a plane that intersects at right angles to the optical axis direction of the image pickup unit, and the image of the subject is captured via the image reflection mirror group and the top plate mirror. An image pickup apparatus for shooting with a camera.   8. The photographing apparatus according to claim 7, further comprising a communication unit that communicates with a display device, wherein the photographed image is transmitted from the communication unit to the display device.

Images