JP2005208130A - Rotary display device and its driving method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotary display device that can display a high-quality three-dimensional image, that can easily obtain an optional angle of vision characteristic, and that can be manufactured at low cost, and also to provide a driving method of the device. <P>SOLUTION: In the rotary display device equipped with a cylindrical screen 3, black display data for displaying black is preliminarily stored, in the area of each rotation angle θ ranging from -5π/36(-25°) to -π/4(-45°) and from 5π/36(25°) to π/4(45°). Also, display data for displaying images is preliminarily stored, only in the area of a rotation angle θ ranging from -5π/36(-25°) to -π/4(45°). <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a rotary display device that performs three-dimensional display and a driving method thereof.

2. Description of the Related Art Conventionally, a rotary display device that rotates a display unit that directly displays a two-dimensional image in a captured direction is known (Non-Patent Document 1).
In this rotary display device, a flat display having a small viewing angle with respect to the left-right direction, that is, an image that cannot be observed from an oblique viewpoint, is rotated. In this rotary display device, a flat display with a small viewing angle is rotated at a constant speed, and an image displayed on the display is changed according to the orientation of the display, that is, the rotation angle, so that it varies depending on the viewpoint position. An image can be displayed. In other words, it is possible to display the entire circumference of a person approximately by shooting subjects such as people from different directions with multiple cameras and displaying the obtained images in the same direction as the shooting direction. Become.
Proceedings of the 8th Annual Meeting of the Virtual Reality Society of Japan (September 2003), pp. 115-118

  By the way, the conventional rotary display device described in Non-Patent Document 1 can realize a display with a stereoscopic effect using a flat display. However, the flat display has a relatively wide viewing angle range in which a displayed image can be recognized. When a flat display having such a viewing angle characteristic is applied to a rotary display device, in order to prevent an image viewed from one viewpoint from overlapping with an image viewed from an adjacent viewpoint, that is, from a certain viewpoint. In order to suppress the overlap between the display image and the display image of the adjacent viewpoint, it is necessary to limit the viewing angle of the display by some means. Therefore, in the conventional rotary display device, a privacy filter is attached to the surface of the display in order to reduce the viewing angle (viewing angle) of the display.

  For this reason, the conventional rotary display device has a problem that it is difficult to obtain an arbitrary viewing angle characteristic because the viewing angle of the display depends on the original viewing angle characteristic of the display. Moreover, in order to reduce the viewing angle of the display, the configuration in which the privacy filter is attached to the surface of the display increases the number of parts by the amount of the filter and takes time for manufacturing, resulting in an increase in manufacturing cost. There was a problem. Furthermore, in order to limit the viewing angle of the display, a method such as providing a black light shielding plate on the display to physically block the display period of the image can be considered, but in this case, the structure of the display itself becomes complicated. End up.

  The present invention has been made paying attention to the above-mentioned conventional problems, and its purpose is to enable high-quality three-dimensional image display, to easily obtain an arbitrary viewing angle characteristic, and at low cost. An object of the present invention is to provide a rotatable display device and a driving method thereof.

A rotary display device according to the present invention is a rotary display device that performs three-dimensional display, and is arranged in a cylindrical screen and rotatably inside the screen, and a plurality of displays on the screen by its own rotation. A projection means for displaying images taken from different directions in the area, and displaying the images taken from different directions in each of the plurality of display areas in synchronization with the rotation period of the projection means, The gist is that a black display period is provided between display periods for displaying the image.

  According to this, the projection means is rotated at a certain rotational speed, and two-dimensional images taken from different directions are taken in each of the plurality of display areas on the cylindrical screen in synchronization with the rotation cycle of the projection means. Display in the same direction as the selected direction. As a result, when each display area on the screen is viewed from each viewpoint corresponding to each display area, an observer at each viewpoint can observe a moving image displayed three-dimensionally.

In addition, when displaying images taken from different directions in each of the plurality of display areas in synchronization with the rotation period of the projection unit, the images are displayed in two adjacent display areas among the plurality of display areas. A black display period for displaying black is provided between the display periods. For this reason, when a plurality of display areas on the screen are viewed from each viewpoint corresponding to each display area, the display period during which an image is displayed in each display area is limited by black display during the black display period. As a result, the visible range of the display image for the observer at each viewpoint is limited. Thereby, the overlap between the display image of each viewpoint and the display image of the adjacent viewpoint is suppressed, and it is possible to suppress the display image of the adjacent viewpoint from becoming an afterimage in the eyes of the observer of each viewpoint. Thereby, a high-quality three-dimensional image display is obtained. In addition, by appropriately changing the black display period of each display region, the visible range of the display image for the observer at each viewpoint can be changed.
Therefore, a high-quality three-dimensional image display is possible, an arbitrary viewing angle characteristic can be easily obtained, and a rotary display device that can be manufactured at low cost can be realized.

  In the rotary display device, black for displaying black on at least one of the display data before and after the display period on each of the plurality of display data for displaying images taken from different directions in each of the plurality of display areas. The gist is that display data is provided.

  According to this, by changing the data length of the black display data for black display, it is possible to change the black display period of each display region and change the visible range of the display image for the observer at each viewpoint. it can.

The gist of the rotary display device is that the projection means is provided in a number corresponding to each of the plurality of display areas.
According to this, the projection display device can project a two-dimensional image taken from different directions onto each of the plurality of screens in synchronization with the rotation period of the rotary display device.

The gist of the rotary type display device is that the projection means is a projection type display device having a liquid crystal light valve.
According to this, by rotating a projection type display device equipped with a liquid crystal light valve at a certain number of rotations, a two-dimensional image taken from different directions is synchronized with the rotation period of the display unit and is the same as the taken direction. By displaying each in the direction, a high-quality image can be displayed on the screen.

  The driving method of the rotary display device according to the present invention is a driving method of a rotary display device that performs three-dimensional display. A plurality of the display devices on the screen are rotated by rotation of projection means that is rotatably arranged inside a cylindrical screen. When displaying images taken from different directions in each of the display areas, and displaying them in synchronization with the rotation period of the projection means, the gist is to put black display during the display period for displaying the images. To do.

According to this, when displaying images taken from different directions in each of the plurality of display areas in synchronization with the rotation period of the projection means, the images are respectively displayed in two adjacent display areas among the plurality of display areas. Black display was added during the display period. For this reason, when a plurality of display areas on the screen are viewed from each viewpoint corresponding to each display area, the display period during which an image is displayed in each display area is limited by black display during the black display period. As a result, the visible range of the display image for the observer at each viewpoint is limited. Thereby, the overlap between the display image of each viewpoint and the display image of the adjacent viewpoint is suppressed, and it is possible to suppress the display image of the adjacent viewpoint from becoming an afterimage in the eyes of the observer of each viewpoint. Thereby, a high-quality three-dimensional image display is obtained. In addition, by appropriately changing the black display period of each display region, it is possible to change the visible range of the display image for the observer at each viewpoint.

  Therefore, a high-quality three-dimensional image display is possible, an arbitrary viewing angle characteristic can be easily obtained, and a rotary display device that can be manufactured at low cost can be realized.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, embodiments of the invention will be described with reference to the drawings.
A rotary display device 1 according to the present embodiment will be described with reference to FIGS. FIG. 1 is an overall perspective view of the rotary display device 1 according to the first embodiment, and FIG. 2 is a front view of the rotary display device 1. FIG. 3 is a plan view of the rotary display device 1.

  As shown in FIGS. 1 to 3, the rotary display device 1 includes a cylindrical screen 3 and four projection display devices P <b> 1, P <b> 2, which are rotatably arranged inside the cylindrical screen 3. P3 and P4. The four projection type display devices P1 to P4 have different directions to the first to fourth screens D1, D2, D3, and D4 as four display areas having different angles on the cylindrical screen 3 by their rotation. Display images taken from.

  When the images taken from different directions are displayed on each of the first to fourth screens D1 to D4 in synchronization with the rotation period of the projection display devices P1 to P4, the first to fourth screens are displayed. A period of black display is provided between display periods of displaying the image on two adjacent screens among the screens D1 to D4.

  As shown in FIGS. 1 and 3, the cylindrical screen 3 has four support columns H fixed to the pedestal 2 at equal intervals, and each of the support columns H has the first to fourth screens. D1-D4 is stretched and the whole is made cylindrical.

  As shown in FIGS. 2 and 3, a rotation support shaft 4 is placed on the pedestal 2 on the central axis (z-axis direction) inside the hollow of the screen 3. That is, the first to fourth screens D <b> 1 to D <b> 4 are provided so as to be symmetric about the rotation support shaft 4. Further, the rotation support shaft 4 is rotated in the clockwise direction as shown in FIG. 3 by a motor 6 provided in the base 2.

  In addition, as shown in FIG. 2 and FIG. 3, the rotary display device 1 uses four projection display devices P <b> 1 to P <b> 4 to capture four two-dimensional images respectively taken from four different directions. Each of the screens D1 to D4 is projected in synchronization with the rotation period of the rotation support shaft 4.

The four projection display devices P <b> 1 to P <b> 4 are integrally supported on the rotation support shaft 4 and rotate in synchronization with the rotation cycle of the rotation support shaft 4. Each of the four projection display devices P1 to P4 is arranged so as to project the light representing the image in an enlarged manner toward the center of the corresponding screen among the four first to fourth screens D1 to D4. ing. As shown in FIG. 3, when the first projection type display device P1 is disposed at a position facing the first screen D1 among the projection type display devices P1 to P4, another second projection type display is performed. A device P2 is arranged on the second screen D2. At this time, the third projection type display device P3 is arranged at a position facing the third screen D3, and the fourth projection type display device P4 is arranged at a position facing the fourth screen D4. ing.

FIG. 4 is a view for explaining the rotary display device 1 when the projection display devices P1 to P4 are rotated by the rotation of the rotation support shaft 4. As shown in FIG.
As shown in FIG. 4, the angle formed when the projection display devices P1 to P4 are rotationally driven in the clockwise direction in FIG. 4 from the position where the viewpoint A of the stationary observer and the first screen D1 face each other. The rotation angle θ is assumed. Therefore, when the rotation angle θ = 0, the observer's viewpoint A is on the first screen D1, the observer's viewpoint B is on the second screen D2, and the observer's viewpoint C is on the third screen D3. The person's viewpoint D faces the fourth screen D4. At the position of θ = 0, the rotation angle θ of the projection display device P1 is 0, the rotation angle θ of the projection display device P2 is π / 2, the rotation angle θ of the projection display device P3 is π, and the projection The rotation angle θ of the mold display device P4 is 3π / 2.

  For example, images shown in FIG. 5 are displayed on the first to fourth screens D1 to D4 by the four projection display devices P1 to P4, respectively. On the first screen D1, an image obtained by photographing a person from the front is displayed in the same direction as the photographed direction by the first projection display device P1 (see FIG. 5A). On the second screen D2, the second projection display device P2 displays an image of the same person taken from the left side in the same direction as the direction in which the image was taken (see FIG. 5B). On the third screen D3, an image obtained by photographing the same person from the back is displayed in the same direction as the photographed direction by the third projection display device P3 (see FIG. 5C). Then, on the fourth screen D4, an image obtained by photographing the same person from the right side is displayed in the same direction as the photographed direction by the fourth projection display device P4 (see FIG. 5D).

  In this way, two-dimensional images taken from different directions by the four projection display devices P1 to P4 on the four first to fourth screens D1 to D4 are synchronized with the rotation period of the rotation support shaft 4. Each of the projection display devices P1 to P4 is rotationally driven so that the images are simultaneously displayed in the same direction as the imaged direction.

  As seen from the viewpoint A shown in FIG. 3, the first screen D1 when the projection display devices P1 to P4 are rotating at a predetermined speed at a predetermined rotational speed is as shown in FIG. A three-dimensional display of a moving image obtained by photographing a simple person from the front. When the second screen D2 on the screen 3 is viewed from the viewpoint B shown in FIG. 3, a moving image obtained by photographing a person as shown in FIG. 5B from the left side is displayed three-dimensionally. When the screen D3 is viewed from the viewpoint C shown in the figure, a moving image obtained by photographing a person as shown in FIG. 5C from the back is displayed three-dimensionally. Then, when the fourth screen D4 is viewed from the viewpoint D shown in the figure, a moving image obtained by photographing a person as shown in FIG. 5D from the right side is displayed three-dimensionally.

  Next, details of the driving method of the rotary display device 10 configured as described above will be described with reference to FIGS. 6, 7, 8, 9, and 10. Since the first to fourth screens D1 to D4 and the projection display devices P1 to P4 all have the same configuration, only the driving method for the first screen D1 of the rotary display device 10 will be described for convenience of explanation. The details of the driving method for the other second to fourth screens D2 to D4 are omitted.

  6 to 9 are diagrams for explaining the viewing angle θs of the first screen D1 of the rotary display device 10, respectively. That is, as shown in FIG. 6, the first projection display device P <b> 1 faces the first screen D <b> 1 by rotating in a rotation angle θ range of −π / 4 to π / 4. In each of FIGS. 6 to 9, the projection display devices P <b> 1 to P <b> 4 indicate the rotation center point of the rotation support shaft 4 with Q.

  In the first projection display device P1 of the present embodiment, the projection display devices P1 to P4 (see FIG. 2) are rotationally driven, and the rotation angle θ is changed from −5π / 36 (−25 °) to −π / 4. Black for displaying black on the first screen D1 in the range of each rotation angle θ1 (see FIGS. 7 and 9) of (−45 °) and 5π / 36 (25 °) to π / 4 (45 °). Display data is stored in advance. Further, in the first projection display device P1 of the present embodiment, the rotation support shaft 4 is driven to rotate, and the rotation angle θ is a rotation angle of −5π / 36 (−25 °) to 5π / 36 (25 °). Display data for displaying an image is stored in advance on the first screen D1 in the range of θo (see FIG. 8). That is, a black display period for displaying black is provided between display periods for displaying the image on the first screen D1.

  First, the first projection display device P1 reaches the rotation angle θ = −π / 4 (−45 °). Then, the projection display devices P1 to P4 further rotate clockwise around the center point Q from the rotation angle θ, so that the first projection display device P1 has the rotation angle θ = −5π /. 36 (−25 °). During this rotation period, black based on the black display data is displayed on the first screen D1 (see FIG. 7).

  Subsequently, the projection display devices P1 to P4 rotate in the clockwise direction with the center point Q as the rotation center, and the rotation angle θ passes through 0 from −5π / 36 (−25 °) to 5π / 36 ( 25 °). During this rotation period, an image a based on the display data is displayed on the first screen D1 (see FIG. 8).

  Thereafter, the projection display devices P1 to P4 have the rotation angle θ in the clockwise direction from 5π / 36 (25 °) to π / 4 (45 °) with the center point Q as the rotation center. During this rotation period, black based on the black display data is displayed on the first screen D1 (see FIG. 9).

  10A shows the rotation angle θ, FIG. 10B shows the viewing angle θs when the display method of the present invention is used, and FIG. 10C shows the viewing angle when the conventional driving method is used. It is a figure for demonstrating each. As shown in FIG. 10B, the corresponding image a is displayed on the first screen D1 only when the rotation angle θ is −5π / 36 (−25 °) to 5π / 36 (25 °). Black display is performed during the rotation period of π / 4 (−45 °) to −5π / 36 (−25 °) and 5π / 36 (25 °) to π / 4 (45 °). In other words, in the first screen D1, the rotation angle θ is −π / 4 (−45 °) to −5π / 36 (−25 °) and 5π / 36 (25 °) to π / 4 (45 °). The rotation period is the black display period. Thus, by changing the data length of the black display data for displaying the black, the viewing angle θs is in the angle range of −5π / 36 (−25 °) to 5π / 36 (25 °), that is, 5π / 18 ( 50 °).

  Therefore, the viewing angle θs at which the observer can visually recognize the image a is an angle range from −5π / 36 (−25 °) to 5π / 36 (25 °), that is, 5π / 18 (50 °). The rotation angle θ of the first screen D1 is from −5π / 36 (−25 °) to 5π / 36 (25 °) corresponds to the display period described above.

  On the other hand, as shown in FIG. 10C, conventionally, the observer's viewpoint A has a rotation angle θ on the first screen D1 of −π / 4 (−45 °) to π / 4. Since the image a is displayed during the rotation period of (45 °), the range of the viewing angle θs at which the displayed image can be recognized is π / 2 (90 °).

The same applies to the other screens D2 to D4. The second screen D2 displays an image only when the rotation angle θ is 13π / 36 (65 °) to 23π / 36 (115 °). A black image is displayed during the rotation periods of π / 4 (45 °) to 13π / 36 (65 °) and 23π / 36 (115 °) to 3π / 4 (135 °).

  The third screen D3 displays an image only when the rotation angle θ is 31π / 36 (155 °) to 41π / 36 (205 °), and 3π / 4 (135 °) to 31π / 36 (155 °). ) And 41π / 36 (205 °) to 5π / 4 (225 °) rotation period, a black image is displayed. Similarly, on the fourth screen D4, an image is displayed only when the rotation angle θ is 49π / 36 (245 °) to 59π / 36 (295 °), and 5π / 4 (225 °) to 49π / 36. A black image is displayed during the rotation period of (245 °) and 59π / 36 (295 °) to 7π / 4 (315 °).

  In the same manner as described above, the rotation angle θ of the second screen D2 from 13π / 36 (65 °) to 23π / 36 (115 °) corresponds to the display period described above. The rotation angle θ of the third screen D3 is 31π / 36 (155 °) to 41π / 36 (205 °) corresponds to the display period described above. Further, the rotation angle θ of the fourth screen D4 between 49π / 36 (245 °) and 59π / 36 (295 °) corresponds to the display period described above.

  In this way, images taken from different directions are displayed on each of the first to fourth screens D1 to D4 in synchronization with the rotation periods of the corresponding first to fourth projection display devices P1 to P4. In this case, a black display period is provided between display periods for displaying the image. For this reason, when the first to fourth screens D1 to D4 are viewed from the viewpoints A to D corresponding to the respective screens, the display period in which the images are displayed on the screens D1 to D4 is the black display period. Limited by black display. As a result, the visible range of the display image for the observer at each viewpoint A to D is limited. Thereby, the overlap between the display images of the respective viewpoints A to D and the display images of the adjacent viewpoints can be suppressed, and the display images of the adjacent viewpoints can be suppressed from becoming afterimages to the observers of the respective viewpoints. Thereby, a high-quality three-dimensional image display is obtained.

In addition, by appropriately changing the black display period of each of the first to fourth screens D1 to D4, it is possible to arbitrarily change the visible range of the display image for the observer at each viewpoint A to D.
Further, as described above, each of the projection type display devices P1 to P4 of the present embodiment has a rotation angle θ of −π / 4 (−45 °) to −5π / 36 (−25 °) and 5π in the display data. Data for displaying black was stored for each rotation angle θ from / 36 (25 °) to π / 4 (45 °). Therefore, the viewing angle range (viewing angle range) can be narrowed without providing a means for limiting the viewing angle, such as a privacy filter. As a result, it is possible to provide a rotary display device having an excellent display quality in which an image viewed from one viewpoint A, B, C, D does not overlap with an image viewed from another adjacent viewpoint. In addition, since it is not necessary to provide a means for limiting the viewing angle such as a privacy filter, a high-quality three-dimensional image display is possible, an arbitrary viewing angle characteristic can be easily obtained, and it can be manufactured at low cost. A rotary display device can be realized.

  Further, since the screens D1, D2, D3, and D4 are provided with black light shielding plates so that the viewing angle range (viewing angle range) can be narrowed without physically blocking the image display period, the screen itself. There is no complication of the structure. Furthermore, since the rotation angle θ can be changed by changing the data length of the display data for displaying black, the viewing angle range (viewing angle range) can be arbitrarily set.

According to 1st Embodiment comprised as mentioned above, there exist the following effects.
○ According to the present embodiment, the projection display devices P1 to P4 are rotated at a certain rotational speed, and the four screens D1 to D4 of the screen 3 are photographed from different directions by the four projection display devices P1 to P4. A two-dimensional image is displayed in the same direction as the direction taken in synchronization with the rotation period of the projection display devices P1 to P4.

  When the screens D1 to D4 of the screen 3 rotating at a certain number of rotations are viewed at the viewpoints A to D shown in FIG. 3, the observers at the respective viewpoints can view the screens shown in FIGS. It can be observed that an image as shown in FIG.

  ○ According to this embodiment, the first to fourth projection display devices P1 to P4 store black display data for displaying black in the range of the respective rotation angles θo, and the rotation angle θ is Display data for displaying a corresponding image for each range of the rotation angle θ1 is stored in advance.

  Accordingly, when displaying images taken from different directions on each of the first to fourth screens D1 to D4 in synchronization with the rotation periods of the corresponding first to fourth projection display devices P1 to P4. A period for black display is provided between the display periods for displaying the image. For this reason, when the first to fourth screens D1 to D4 are viewed from the viewpoints A to D corresponding to the respective screens, the display period in which the images are displayed on the respective screens D1 to D4 displays black. Limited by black display in period. As a result, the visible range of the display image for the observer at each viewpoint A to D is limited. Thereby, the overlap between the display images of the respective viewpoints A to D and the display images of the adjacent viewpoints can be suppressed, and the display images of the adjacent viewpoints can be suppressed from becoming afterimages to the observers of the respective viewpoints. Thereby, a high-quality three-dimensional image display is obtained.

  ○ According to this embodiment, since the rotation angle θ can be changed by changing the data length of the black display data for displaying black, the range (viewing angle range) of the viewing angle θs can be arbitrarily set. .

[Projection type display device]
Next, an example of the projection display devices P1 to P4 used in the first embodiment will be described with reference to FIG.

  This projection type display device P1 (P2, P3, P4) is a projection type display provided with transmissive liquid crystal light valves 112, 113, 114 for different colors of R (red), G (green), and B (blue). Device. These transmissive liquid crystal light valves 112, 113, and 114 are each constituted by a liquid crystal display panel.

  The projection display device P1 includes a projector main body 111, an illumination device 120, a color separation / synthesis system 130, and a projection optical system 140 as a projection device having a plurality of projection lenses. The projector main body 111 includes a lighting device 120, a color separation / synthesis system 130, a power supply device 150, and the like.

  The illumination device 120 includes a light source 115, two fly-eye lenses 116 and 117, and a polarization conversion device 118. The color separation / synthesis system 130 includes two dichroic mirrors 121 and 122, three reflection mirrors 123 to 125, three relay lenses 126 to 128, three transmissive liquid crystal light valves 112 to 114, and a cross dichroic prism 129. And have.

The light source 115 includes a lamp 120a such as a high-pressure mercury lamp or a metal halide lamp, and a reflector 120b that reflects light L from the lamp 120a (hereinafter referred to as “light source light L”). Further, in order to make the illuminance distribution of the light source light L uniform in the transmissive liquid crystal light valves 112 to 114, two fly-eye lenses 116 and 117 are provided. Each fly-eye lens 116, 117 is composed of a plurality of (for example, 6 × 8) lenses 116a, 117a arranged two-dimensionally. Thus, the transmissive liquid crystal light valves 112 to 114 are illuminated with uniform light intensity by the fly-eye lenses 116 and 117 with the light source light L.

  The polarization conversion device 118 includes a polarization beam splitter array (PBS array) provided on the fly-eye lens 117 side, and a half-wave plate that converts the polarization direction of polarized light reflected by the PBS array, and is a light source light The polarization direction of light is aligned in one direction without impairing the light intensity of L.

  The dichroic mirrors 121 and 122 are formed, for example, by laminating a dielectric multilayer film having a predetermined wavelength selectivity on a glass substrate. The dichroic mirror 121 transmits the red light LR of the light source light L and reflects the green light LG and the blue light LB. The dichroic mirror 122 reflects the green light LG among the green light LG and the blue light LB reflected by the dichroic mirror 121 and transmits the blue light LB.

  As a result, in the color separation / combination system 130, the red light LR out of the light source light L incident from the illumination device 120 passes through the dichroic mirror 121 and is then reflected by the reflection mirror 123 to be transmitted through the transmissive liquid crystal light for red light. The light enters the valve 112. The green light LG is reflected by the dichroic mirror 121, then reflected by the dichroic mirror 122, and is incident on the transmissive liquid crystal light valve 112 for green light. The blue light LB is reflected by the dichroic mirror 121, then passes through the dichroic mirror 122, passes through a relay system composed of three relay lenses 126 to 128 and two reflection mirrors 124 and 125, and transmits blue liquid. The light enters the light valve 114.

The transmissive liquid crystal light valves 112 to 114 as light modulators are each driven by a drive circuit (not shown) based on display data such as a video signal.
The cross dichroic prism 129 has a structure in which a right angle prism is bonded, and a dielectric multilayer film that reflects the red light LR and transmits the green light LG is formed on one of the two mirror surfaces orthogonal to the cross shape. On the other side, dielectric multilayer films that reflect the blue light LB and transmit the green light LG are formed. The three color lights of the red light LR, the green light LG, and the blue light LB are combined by the cross dichroic prism 129 to form light representing a color image, and this light is enlarged and projected onto the screen 141 by the projection optical system 140. It has come to be.

  By using the projection display device P1 having such a configuration for the projection display devices P1 to P4, it is possible to realize a rotary display device capable of obtaining a high-quality display image on the screens D1 to D4 shown in FIG. Can do.

In addition, embodiment of invention is not limited to said each embodiment, You may implement as follows.
In the above embodiment, four projection display devices P1 to P4 are used as projection means, and each time these four projection display devices P1 to P4 rotate within a range of a rotation angle θ1 that is a period for displaying black. Further, black is displayed on each of the screens D1 to D4 at the same time according to the black display data stored in the projection display devices P1 to P4. The present invention can also be applied to a configuration in which one projection display device is rotated instead of the four projection display devices P1 to P4. In this case, images are sequentially displayed on the four screens D1 to D4 while one projection display device makes one rotation. That is, the screen D1 is rotated while the display device is rotating 0 to π / 2, the screen D2 is rotated while the display device is further rotated π / 2, and the screen D3 is rotated while the display device is further rotated π / 2. The image is displayed on the screen D4 while the display device rotates for the remaining π / 2.

  Therefore, in this case, in one projection display device, four types of display data for displaying images on the four screens D1 to D4 are stored in the order in which the images are displayed by the rotation of the projection display device. ing. Each of the four types of display data is provided with black display data for displaying black in the period of the rotation angle θ1, which is the black display period described above. By doing in this way, the effect similar to the said embodiment can be acquired.

  In the above embodiment, for example, the first projection display device P1 has a rotation angle θ of −5π / 36 (−25 °) to −π / 4 (−45 °) and 5π / 36 (25 °). To display black data for displaying black on the first screen D1 in a period of each rotation angle θ1 from π / 4 (45 °). This is a range of rotation angles θ1 whose rotation angle θ is −5π / 36 (−25 °) to −π / 4 (−45 °) or 5π / 36 (25 °) to π / 4 (45 °). Black display data for displaying black on the first screen D1 may be stored in advance in either one of these. At this time, black is displayed on the second to fourth screens D2 to D4 corresponding to only one of the rotation angles θ1 on the other second to fourth projection display devices P2 to P4. For this purpose, black display data is stored in advance. By doing in this way, the effect similar to the said embodiment can be acquired.

  In the above embodiment, for example, the first projection display device P1 has a rotation angle θ of −5π / 36 (−25 °) to −π / 4 (−45 °) and 5π / 36 (25 °). To π / 4 (45 °) in the range of each rotation angle θ1, black display is performed according to previously stored black display data. A black display is displayed in a range of rotation angles other than −5π / 36 (−25 °) to −π / 4 (−45 °) and 5π / 36 (25 °) to π / 4 (45 °). The black display period may be changed as appropriate. Similarly, in the other second to fourth projection display devices P2 to P4, the black display period during which the black display is displayed may be appropriately changed.

  In the above embodiment, there are four screens as display areas on the screen 3, but the present invention is not limited to this. For example, there may be three. By doing in this way, the effect similar to the said embodiment can be acquired.

  In the rotary display device 1 according to the above embodiment, the range (viewing angle range) of the viewing angle θs is arbitrarily set by controlling the data length of black display data for displaying black. Instead, by changing the rotation speed of the first to fourth projection type display devices P1 to P4 for display data having a certain data length for displaying black, the range of the viewing angle θs (viewing angle range) ) May be set arbitrarily. By doing in this way, the range (viewing angle range) of viewing angle (theta) s can be easily set only by controlling the rotational speed of 1st-4th projection type display apparatus P1-P4.

  The liquid crystal projector as the projection display device has been described as an example of the projection display device used in the first embodiment, but the present invention is also applied to a configuration in which a liquid crystal projector having one liquid crystal light valve is used as the projection display device. The invention is applicable.

1 is an overall perspective view of a rotary display device according to an embodiment. 1 is a front view of a rotary display device according to an embodiment. It is a top view of the rotary display device according to the embodiment. It is a figure for demonstrating the rotation type display apparatus when a screen rotates. It is a figure for showing an example of the image displayed on each screen, (a) is an image which photoed the person from the front, (b) is an image which photoed the same person from the left side, and (c). (D) is an image n of the same person taken from the right side. It is a figure for demonstrating the visual recognition angle of a screen. It is a figure for demonstrating the visual recognition angle of a screen. It is a figure for demonstrating the visual recognition angle of a screen. It is a figure for demonstrating the visual recognition angle of a screen. (A) is a figure for demonstrating a rotation angle. (B) is a figure for demonstrating the visual recognition angle at the time of using the drive method of this invention. (C) is a figure for demonstrating the viewing angle at the time of using the conventional drive method. It is a figure for demonstrating an example of a projection type display apparatus.

Explanation of symbols

    D1 to D4... First to fourth screens as display areas, P1 to P4... Projection type display device as projection means, 1... Rotary display device, 3.

Claims (5)

In a rotary display device that performs three-dimensional display,
A cylindrical screen;
Projection means that is rotatably arranged inside the screen and displays images taken from different directions in a plurality of display areas on the screen by its rotation,
A black display period is provided between the display periods for displaying the images when the images taken from different directions are displayed in each of the plurality of display areas in synchronization with the rotation period of the projection unit. A rotary display device characterized by the above. The rotary display device according to claim 1,
Each of the plurality of display data for displaying images taken from different directions in each of the plurality of display areas is provided with black display data for black display at least before or after the display period. Rotating display device characterized. The rotary display device according to claim 1 or 2,
A number of projection means are provided corresponding to each of a plurality of display areas. The rotary display device according to any one of claims 1 to 3,
The rotary display device, wherein the projection means is a display device having a liquid crystal light valve. In a driving method of a rotary display device that performs three-dimensional display,
An image taken from different directions is displayed on each of the plurality of display areas on the screen by rotation of the projection means rotatably arranged inside the cylindrical screen,
A method for driving a rotary display device, wherein a black display is inserted during a display period for displaying the image when displaying in synchronization with a rotation cycle of the projection means.

Images