JP2005202127A - Rotary type display device and driving method for rotary type display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotary type display device capable of easily obtaining optional view angle characteristic and being inexpensively manufactured without complicating the structure of a rotary display part itself, and a driving method for the rotary type display device. <P>SOLUTION: Display data for displaying black in the range of each rotational angle θo where a rotational angle θ is from -π/4(-45°) to -π/9(-20°) and from π/9(20°) to π/4(45°) is stored in advance in a projection type display device, and display data for displaying a picture only in the range of a rotational angle θ1 where the rotational angle θ is from -π/9(-20°) to π/9(20°) is stored in advance therein. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a rotary display device that rotates a display unit that displays an image and a driving method of the rotary display device.

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 of physically blocking the display range of the image by providing a black light shielding plate on the display may be considered, but in this case, the structure of the display itself becomes complicated. End up.

  The present invention has been made by paying attention to the above-mentioned conventional problems, and its purpose is that high-quality three-dimensional image display is possible, and arbitrary viewing angle characteristics can be easily obtained. An object of the present invention is to provide a rotary display device that can be manufactured at low cost without complicating the structure of the device itself, and a driving method of the rotary display device.

The projection display device according to the present invention is a rotary display device that performs three-dimensional display by rotating a display unit, and includes a rotation display unit that is rotatably supported by a plurality of display units. When the images taken from different directions are displayed on each of the plurality of display units in synchronization with the rotation period of the rotation display unit, two adjacent displays among the plurality of display units are rotated. The gist of the present invention is that a black display period for displaying black is provided between the display periods for displaying the image in each section.

  According to this, the rotation display unit is rotated at a certain number of rotations, and two-dimensional images captured from different directions are displayed on a plurality of display units in the same direction as the captured direction in synchronization with the rotation cycle of the rotation display unit. Display each one. As a result, when each display unit of the rotation display unit rotating at a certain number of rotations is viewed from each viewpoint corresponding to each display unit, the observer at each viewpoint displays a moving image three-dimensionally. Can be observed.

  When each of the plurality of display units of the rotation display unit is viewed from each viewpoint corresponding to each display unit, each of the plurality of display units includes a predetermined period before starting display and an image on the display. Since black is displayed in a predetermined period after the display is finished, the visible range of the display image for the observer at each viewpoint is limited. Thereby, it is suppressed that the image displayed on the display unit corresponding to the adjacent viewpoint is mixed, the overlap between the display image of each viewpoint and the display image of the adjacent viewpoint is suppressed, and the display image of the adjacent viewpoint is An afterimage can be suppressed in the eyes of the observer at the viewpoint. Therefore, an arbitrary viewing angle characteristic can be easily obtained, and a rotary display device that can be manufactured at low cost without complicating the structure of the rotary display unit itself can be realized.

The gist of the rotary display device is that the rotary display unit includes four display units as the plurality of display units.
According to this, two-dimensional images photographed from four directions can be displayed on the four display units in the same direction as the photographed direction in synchronization with the rotation period of the rotation display unit.

The gist of the rotary display device is that the rotary display unit includes three display units as the plurality of display units.
According to this, a two-dimensional image photographed from three directions can be displayed on the three display units in the same direction as the photographed direction in synchronization with the rotation period of the rotation display unit.

In the rotary display device, each of the plurality of display units is a screen arranged in parallel with the rotation center of the rotary display unit, and each of the plurality of screens receives light representing images taken from different directions. The gist is provided with projection means for projecting in synchronization with the rotation period of the rotation display section.
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 display device is that each of the plurality of display units is a thin display.

  According to this, the rotation display unit is rotated at a certain number of rotations, for example, two-dimensional images taken from different directions are photographed in synchronization with the rotation period of the rotation display unit by a plurality of liquid crystal displays of the rotation display unit. Can be displayed in the same direction.

  Thus, when each display of the rotation display unit rotating at a certain number of rotations is viewed from each viewpoint corresponding to each display, the observer at each viewpoint observes that the image is displayed three-dimensionally. be able to.

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 by rotating the display unit. The rotary display device is driven to rotate by a plurality of display units. When the rotation display unit is rotated and an image taken from a different direction is displayed on each of the plurality of display units in synchronization with the rotation cycle of the rotation display unit, the plurality of display units are adjacent to each other. The gist is to display black during a display period in which the image is displayed on each of the two display units.

  According to this, when the plurality of display units of the rotation display unit are viewed from the respective viewpoints corresponding to the respective display units, each of the plurality of display units includes a display before start of display for displaying an image. Since black is displayed in each of the predetermined period and the predetermined period after the end of displaying the image, the visible range of the display image for the observer at each viewpoint is limited. Thereby, it is suppressed that the image displayed by the display part corresponding to an adjacent viewpoint mixes, and the overlap with the display image seen at each viewpoint and the display image of an adjacent viewpoint can be suppressed. Therefore, an arbitrary viewing angle characteristic can be easily obtained, and a rotary display device that can be manufactured at low cost without complicating the structure of the rotary display unit itself can be realized.

Hereinafter, embodiments embodying the present invention will be described with reference to the drawings.
(First embodiment)
A rotary display device 1 according to a first embodiment will be described with reference to FIGS. FIG. 1 is an overall perspective view of the rotary display device according to the present embodiment. FIG. 2 is a front view of the rotary display device. FIG. 3 is a top view of the rotary display device.

  The rotary display device 1 performs three-dimensional display by rotating a display unit. As shown in FIGS. 1 to 3, the rotary display device 1 includes a pedestal 2 and a rotary display unit 3 having a substantially rectangular parallelepiped shape that is rotatably supported on the pedestal 2.

  As shown in FIG. 2, the rotation display unit 3 includes a cylindrical housing having a bottom wall 5 and four side walls fixed to a rotation shaft 4 provided on the base 2. The bottom wall 5 is fixed to the rotating shaft 4. The rotating shaft 4 is rotationally driven by a motor 6 provided in the base 2. With such a configuration, the rotation display unit 3 as a whole is rotated on the pedestal 2 when the rotation shaft 4 is driven to rotate by the motor 6.

  As shown in FIG. 3, the four side walls of the rotation display unit 3 are equiangular (90 ° in this example) around the rotation axis 4 and parallel to the rotation axis 4 (see FIG. 2). Has been placed. These four screens D1 to D4 are planar screens serving as a plurality of display units having different angles. The four planar screens D <b> 1 to D <b> 4 are arranged symmetrically about the rotation axis 4.

  Further, as shown in FIGS. 2 and 3, the rotary display device 1 rotates light representing images representing images of a subject such as a person from four different directions on each of the four screens D1 to D4. 4 is provided with four projection type display devices P1 to P4 as projection means for projecting in synchronization with the three rotation periods.

  These four projection display devices P1 to P4 are integrally supported on a support member 7 fixed to the bottom wall 5 of the rotary display unit 3. The support member 7 is fixed to the bottom wall 5 of the rotation display unit 3 coaxially with the rotation shaft 4. Accordingly, the four projection display devices P1 to P4 rotate together with the rotation display unit 3. Further, the four projection display devices P1 to P4 are arranged so as to project the enlarged light toward the central portions of the corresponding screens D1 to D4, respectively.

Accordingly, the projection display device P1 is synchronized with the rotation of the rotation display unit 3 by the rotation of the rotation shaft 4.
-P4 is rotated at a predetermined rotational speed in the direction of the arrow in FIG. And as shown in FIG. 3, the 1st projection type display apparatus P1 of the four projection type display apparatuses P1-P4 by the rotational drive of the motor 6 is on the 1st screen D1 arrange | positioned in the position which opposes, The second projection display device P2 can display a predetermined image corresponding to the second screen D2 disposed at the facing position. Similarly, the third projection type display device P3 among the four projection type display devices P1 to P4 is driven on the third screen D3 arranged at the opposed position by the rotation drive of the motor 6. The mold display device P4 can display a predetermined image corresponding to the fourth screen D4 arranged at the facing position.

  FIG. 4 is a diagram for explaining the rotary display device 1 when the rotary display unit 3 rotates. As shown in FIG. 4, the angle formed when the rotary shaft 4 is driven to rotate clockwise in FIG. 4 from the position where the viewpoint A of the stationary observer and the first screen D1 face each other is defined as the rotation angle θ. . Accordingly, the rotation angle θ of the second screen D2 when the viewer's viewpoint B faces the second screen D2 is π / 2, and the third rotation when the viewer's viewpoint C faces the third screen D3. The rotation angle θ of the screen D3 is π, and the rotation angle θ of the fourth screen D4 when the observer's viewpoint D faces the fourth screen D4 is 3π / 2.

  In each of the projection display devices P1 to P4, the subject is photographed in advance by four cameras arranged at equal angles to each other (90 ° in this example), and display data of the obtained image is stored. Yes. For example, the first projection display device P1 stores display data corresponding to an image of the subject viewed from the front (rotation angle θ = 0). The second projection display device P2 stores display data corresponding to an image obtained by viewing the subject from the left side (rotation angle θ = π / 2). For example, the third projection display device P3 stores display data corresponding to an image obtained by viewing the subject from the rear (rotation angle θ = π). Further, for example, the fourth projection display device P4 stores display data corresponding to an image obtained by viewing the subject from the right side (rotation angle θ = 3π / 2). The rotation shaft 4 of the motor 6 is driven to rotate at a constant speed, so that the rotation display unit 3 rotates at a constant speed, and the images displayed on the screens D1 to D4 are oriented to the screens D1 to D4. That is, the display is switched according to the rotation angle θ.

  For example, an image as shown in FIG. 5 is displayed on the four screens D1 to D4 by the four projection display devices P1 to P4. FIG. 5 shows an example of images displayed on the screens D1 to D4. An image obtained by photographing a person from the front is displayed on the screen D1 by the projection display device P1 (see FIG. 5A). On the screen D2, an image obtained by photographing the same person from the left side is displayed by the projection display device P2 (see FIG. 5B). On the screen D3, an image obtained by photographing the same person from behind is displayed by the projection display device P3 (see FIG. 5C). Then, on the screen D4, an image obtained by photographing the same person from the right side is displayed by the projection display device P4 (see FIG. 5D).

  Images taken from different directions are displayed on the four screens D <b> 1 to D <b> 4 in synchronization with the rotation period of the rotation display unit 3 by the four projection display devices P <b> 1 to P <b> 4. For example, while the rotation display unit 3 makes one rotation, the four screens D1 to D4 are different from each other in the screens D1 to D4 within a predetermined angle range centering on positions corresponding to the corresponding four viewpoints A to D. The projection display devices P1 to P4 are driven and controlled so that images taken from the direction are simultaneously displayed by the projection display devices P1 to P4.

When the screen D1 of the rotation display unit 3 rotating at a certain number of rotations while driving and controlling the four projection display devices P1 to P4 in this way is viewed from the viewpoint A shown in FIG. 3, FIG. A moving image obtained by photographing a person from the front is displayed three-dimensionally. When the screen D2 of the rotation display unit 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. When the 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 in a three-dimensional manner.

  In the rotary display device 1 configured as described above, when the screen D1 of the rotary display unit 3 rotating at a constant rotational speed is viewed from the viewpoint A shown in FIG. 3, as shown in FIG. A three-dimensional display of a moving image obtained by photographing a simple person from the front. When the screen D2 of the rotation display unit 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. When the 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 in a three-dimensional manner.

  Next, details of a driving method of the rotary display device 1 configured as described above will be described with reference to FIGS. In the driving method of this example, when the rotation display unit 3 is rotated and images taken from different directions are displayed on the screens D1 to D4 in synchronization with the rotation period of the rotation display unit 3, the screen is used. A feature is that a black display period for displaying black is provided between display periods for displaying the image on two adjacent screens among D1 to D4.

  FIG. 6 is a diagram for explaining the viewing angle θs of the screen in the present invention. The first screen D1 is rotated from θ = −π / 4 (−45 °) to θ = + π / 4 (+45). It is the figure which displayed the case where it rotated (pi) / 2 (90 degrees) in the range of (degree) as rotation in the center part Q of the screen D1.

  In FIG. 6, (A) is the screen D1 when the rotation angle θ is −π / 4 (−45 °), and (B) is the case when the rotation angle θ is −π / 9 (−20 °). (C) is the screen D1 when the rotation angle θ is 0 (0 °). (D) is the screen D1 when the rotation angle θ is π / 9 (20 °), and (E) is the screen D1 when the rotation angle θ is + π / 4 (+ 45 °).

  In the first projection display device P1 of the present embodiment, the rotation shaft 4 (see FIG. 2) is driven to rotate, and the rotation angle θ is changed from −π / 4 (−45 °) to −π / 9. Display data for displaying black is stored in advance in the range of rotation angles θ1 of (−20 °) and π / 9 (20 °) to π / 4 (45 °). Further, in the first projection display device P1 of the present embodiment, the rotation shaft 4 is driven to rotate, and the rotation angle θ is a rotation angle of −π / 9 (−20 °) to π / 9 (20 °). Display data for displaying an image is stored in advance only in the range of θo.

  7A shows the rotation angle θ, FIG. 7B shows the viewing angle θs when the driving method of the present invention is used, and FIG. 7C shows the viewing angle when the conventional driving method is used. It is a figure for demonstrating each. As shown in FIG. 7B, the first screen D1 displays the corresponding image a only when the rotation angle θ is −π / 9 (−20 °) to π / 9 (20 °), A black image is displayed in a rotation period of −π / 4 (−45 °) to −π / 9 (−20 °) and π / 9 (20 °) to π / 4 (45 °). Therefore, the viewpoint A of the observer has an angle range in which the viewing angle θs at which the image a can be viewed is −π / 9 (−20 °) to π / 9 (20 °), that is, 5π / 18 (50 °). It becomes.

That is, the rotation display unit 3 rotates at a constant rotation speed as described above. Therefore, when the rotation angle θ is from −π / 9 (−20 °) to π / 9 (20 °), the first projection display device P1 before the display of an image on the first screen D1 is started. This corresponds to a predetermined period according to the rotation speed. Further, during the rotation period in which the rotation angle θ is π / 9 (20 °) to π / 4 (45 °), the first projection display device P1 has finished displaying images on the first screen D1. This corresponds to a predetermined period. In other words, the first screen D1 includes a black display period in which a black image is displayed in a predetermined period before the start period of the display period in which an image is displayed and a predetermined period after the end period. By controlling the data length of the display data for displaying the display angle, the viewing angle θs is set to an angle range of −π / 9 (−20 °) to π / 9 (20 °), that is, 5π / 18 (50 °). Can do.

  On the other hand, conventionally, as shown in FIG. 7C, 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 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 °).

  As described above, since the black image is displayed in the predetermined period before the start period of the image display period and the predetermined period after the end period, the range of the viewing angle of the image displayed on the first screen D1 ( The viewing angle range) can be made narrower than the conventional one. As a result, it is possible to prevent an image viewed from the viewpoint A of the observer from overlapping with images viewed from the viewpoints B and C of other adjacent observers.

  Similarly, on the second screen D2, an image is displayed only when the rotation angle θ is 13π / 36 (65 °) to 23π / 36 (115 °), and π / 4 (45 °) to 13π / 36 ( A black image is displayed during a rotation period of 65 °) and 23π / 36 (115 °) to 3π / 4 (135 °).

  Further, 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 a rotation period of 41π / 36 (205 °) to 5π / 4 (225 °), 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 °).

  Accordingly, in the same manner as described above, the viewing angle range (viewing angle range) of each image displayed on the second, third and fourth screens D2, D3, D4 is made narrower than the conventional one. Therefore, it is possible to prevent the images viewed from the viewpoints B, C, and D of the respective observers from overlapping with the images viewed from the adjacent viewers.

  Further, as described above, each of the projection display devices P1 to P4 of the present embodiment has a rotation angle θ of −π / 4 (−45 °) to −π / 9 (−20 °) and π in the display data. Data for displaying black was stored in each rotation angle θ from / 9 (20 °) 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, the manufacturing cost of the rotary display device having the display quality can be reduced.

Further, since the screen D1, D2, D3, D4 is provided with a black light shielding plate, the viewing angle range (viewing angle range) can be narrowed without physically blocking the image display range, so the screen itself. There is no complication of the structure. Furthermore, since the rotation angle θ can be controlled by controlling 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 this embodiment, the rotation display unit 3 is rotated at a certain number of rotations, and the four screens D1 to D4 of the rotation display unit 3 are photographed from different directions by the four projection display devices P1 to P4. The three-dimensional images are displayed in the same direction as the direction in which the images were photographed in synchronization with the rotation cycle of the rotation display unit 3.

When the screens D1 to D4 of the rotation display unit 3 rotating at a certain number of rotations are viewed at the viewpoints A to D shown in FIG. It can be observed that an image as shown in d) is displayed three-dimensionally.
○ According to the present embodiment, the rotation angle θ is changed from −π / 4 (−45 °) to −π / 9 (−20 °) and π / 9 (20 °) to the first projection display device P1. In the range of each rotation angle θo of π / 4 (45 °), display data for displaying black is stored in advance. In addition, display data for displaying an image on the first projection display device P1 only in the range of the rotation angle θ1 of the rotation angle θ of −π / 9 (−20 °) to π / 9 (20 °). Stored in advance. Accordingly, since the image is displayed on the first screen D1 only when the rotation angle θ is −π / 9 (−20 °) to π / 9 (20 °), the viewing angle at which the displayed image can be recognized is displayed. The range can be narrowed. As a result, it is possible to prevent an image viewed from the viewpoint A of the observer from overlapping with images viewed from the viewpoints B and C of other adjacent observers.

  In addition, display of each image displayed on the second, third, and fourth screens D2, D3, and D4 is started on the other second to fourth projection display devices P2 to P4 in the same manner as described above. The range of the viewing angle can be narrowed compared to the conventional one. Therefore, it is possible to prevent the images viewed from the viewpoints B, C, and D of each observer from overlapping with images viewed from adjacent observers.

  ○ According to the present embodiment, the rotation angle θ can be controlled by controlling the data length of the display data for displaying black, so the range (viewing angle range) of the viewing angle θs can be arbitrarily set. .

[Second Embodiment]
Next, a rotary display device 1A according to the second embodiment will be described with reference to FIG.
In the rotary display device 1 according to the first embodiment, the screens D <b> 1 to D <b> 4 are arranged symmetrically about the rotation axis 4 on the four side walls of the substantially rectangular parallelepiped casing. On the other hand, in the rotary display device 1A according to the second embodiment, the screens E1 to E3 are respectively formed on the three side walls of the substantially triangular prism casing. Each of the screens E1 to E3 is a display unit.

  Further, as shown in FIG. 8, the rotary display device 1 </ b> A synchronizes the two-dimensional images taken from three different directions on each of the three screens E <b> 1 to E <b> 3 in synchronization with the rotation cycle of the rotary display unit 3. Three projection display devices P11, P22, and P33 for projecting are provided.

  In the rotary display device 1A as described above, as in the first embodiment, the rotary display unit 3 displays black images in the start period and the end period of the period in which the image is displayed. I tried to do it. By doing in this way, the effect similar to the said 1st Embodiment can be acquired.

[Projection type display device]
Next, the projection display devices P1 to P4 and P11 to P33 used in the first and second embodiments.
An example will be described with reference to FIG.

  The projection display device 110 is a three-plate projection color display device that includes transmissive liquid crystal light valves 112, 113, and 114 for different colors of R (red), G (green), and B (blue). . These transmissive liquid crystal light valves 112, 113, and 114 are each constituted by a liquid crystal display panel.

  The projection display device 110 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 / combination system 130 includes two dichroic mirrors 121 and 122, three reflection mirrors 123 to 125, three relay lenses 126 to 128, three liquid crystal light valves 112 to 114, and a cross dichroic prism 129. 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 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 liquid crystal light valves 112 to 114 are illuminated with uniform illumination 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, is reflected by the reflection mirror 123, and is then the liquid crystal light valve 112 for red light. Is incident on. The green light LG is reflected by the dichroic mirror 121, then reflected by the dichroic mirror 122, and enters the 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 including three relay lenses 126 to 128 and two reflection mirrors 124 and 125, and is a liquid crystal light valve for blue light. 114.

The liquid crystal light valves 112 to 114 as light modulation devices are respectively driven by drive circuits (not shown) based on display data such as video signals.
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 110 having such a configuration for the projection display devices P1 to P4 and P11 to P33, the screens D1 to D4 shown in FIG. 1 and the screens E1 to E3 shown in FIG. A rotary display device capable of obtaining a display image can be realized.

In addition, embodiment of invention is not limited to said each embodiment, You may implement as follows.
In the rotary display device 1 according to the first embodiment, the four side walls of the rotary display unit 3A are screens D1 to D4 as display units, respectively. You may make it fix the thin liquid crystal display used as a display part to the four side walls of 3 A of rotation display parts, respectively. By doing so, the same effect as in the first embodiment can be obtained.

  Similarly, in the rotary display device 1A according to the second embodiment, the three side walls of the rotary display unit are screens E1 to E3 as display units, respectively. You may make it fix the thin liquid crystal display used as a display part to the three side walls of a rotation display part, respectively. By doing in this way, the effect similar to the said 2nd Embodiment can be acquired.

Furthermore, the display unit is not limited to a thin liquid crystal display, but includes, for example, an organic EL display including an organic EL element OLED, a display using a digital micromirror device (DMD), a display using an electron-emitting element (FED), SED (Surface-Condition Electron-Emitter Display) may be used.
In the rotary display devices 1 and 1A according to the first and second embodiments, the range (viewing angle range) of the viewing angle θs is arbitrarily set by controlling the data length of the display data for displaying black. I did it. Alternatively, the range (viewing angle range) of the viewing angle θs may be arbitrarily set by controlling the rotation speed of the rotation shaft 4 of display data having a certain data length for displaying black. In this way, the range (viewing angle range) of the viewing angle θs can be easily set simply by controlling the rotation speed of the rotating shaft 4.

  In the rotary display devices 1 and 1A according to the first and second embodiments, the projection display devices P1 to P4 and P11 to P33 have a display for displaying black at each rotation angle θ1. Data was stored in advance, and display data for displaying an image for the range of the rotation angle θo was stored in advance. Alternatively, black display data for displaying black may be inserted between display data for displaying an image. In this way, the display data can be separated from each other by the black display data, so that the same effect as in the above embodiments can be obtained.

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

1 is an overall perspective view of a rotary display device according to a first embodiment. 1 is a front view of a rotary display device according to a first embodiment. 1 is a top view of a rotary display device according to a first embodiment. It is a figure for demonstrating the rotation type display apparatus at the time of a rotation display part rotating. 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. (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 top view of the rotary display device according to the second embodiment. It is a figure for demonstrating an example of a projection type display apparatus.

Explanation of symbols

    D1 to D4, E1 to E3, a screen or display as a display unit, P1 to P4, P11 to P33, a projection display device as a projection means, 1 ... a rotary display device, 3 ... a rotation display unit.

Claims (6)

In a rotary display device that performs three-dimensional display by rotating a display unit,
A rotation display unit rotatably supported by a plurality of display units;
When rotating the rotation display unit and displaying images taken from different directions on each of the plurality of display units in synchronization with the rotation cycle of the rotation display unit, the display units are adjacent to each other. A rotary display device, wherein a black display period for displaying black is provided between display periods for displaying the image on the two display units. The rotary display device according to claim 1,
The rotation display unit includes four display units as the plurality of display units. The rotary display device according to claim 1,
The rotary display unit includes three display units as the plurality of display units. The rotary display device according to any one of claims 1 to 3,
Each of the plurality of display units is a screen arranged in parallel with the rotation center of the rotation display unit,
A rotary display device comprising: a projection unit configured to project light representing images taken from different directions onto each of the plurality of screens in synchronization with a rotation period of the rotary display unit. The rotary display device according to any one of claims 1 to 3,
Each of the plurality of display units is a thin display. In a driving method of a rotary display device that performs three-dimensional display by rotating a display unit,
The rotary display device rotates a rotary display unit that is rotationally driven and includes a plurality of display units, and images captured from different directions are synchronized with the rotation period of the rotary display unit on each of the plurality of display units. When the display is performed, black is displayed during a display period in which the image is displayed on each of two adjacent display units among the plurality of display units.

Images