JP4052314B2 - Stereoscopic image display device and image display device - Google Patents

Description

  The present invention relates to a stereoscopic image display device and an image display device.

A rear projection image display device (rear projector) that projects colored light from the back side of the screen, a stereoscopic image display device that projects colored light with different polarization directions onto the screen, and allows the viewer to recognize the projected image as a stereoscopic image, Image apparatuses that project images from a plurality of projectors onto a plurality of large screens to give the viewer a sense of reality have been widely proposed.
In the invention disclosed in Patent Document 1, images are projected from four projectors arranged corresponding to each screen on the four screens of the front surface, the left surface, the right surface, and the floor surface, and the viewer has a wide viewing angle. An image device that provides realistic video is disclosed.
In the invention disclosed in Patent Document 2, four screens are arranged at predetermined positions in a room, and predetermined images are displayed on the respective screens using four projectors arranged in correspondence with each other.・ A virtual real system with a good sense of realism is disclosed.
JP 2000-122193 A Japanese Patent Laid-Open No. 10-233982

However, the invention disclosed in the above patent document has the following problems.
In other words, it is necessary to use a large screen in order to provide the viewer with a realistic image. Therefore, in order to project an image directly from the back side of the large screen by the projector, there is a problem that a wide projection space is required. Further, in the invention disclosed in the above patent document, it is necessary to use a four-sided (multi-sided) screen in order to ensure a wide viewing angle. Accordingly, there is a problem that four (many) projectors are required to project an image on each screen. In addition, since a plurality of screens and projectors and a wide projection space are required, there is a problem that the cost increases.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a stereoscopic image display device and an image display device that are reduced in thickness, size, and cost.

In order to solve the above problems, the present invention provides a first display means for emitting a right-eye image comprising a front-screen right-eye image and a bottom-screen right-eye image, a front-screen left-eye image, and a bottom Second display means for emitting a left-eye image comprising a screen left-eye image, the front-screen right-eye image emitted from the first display means, and the front emitted from the second display means. A first reflecting means for reflecting a front screen image comprising a screen left eye image; a bottom screen right eye image emitted from the first display means; and a bottom screen output from the second display means. A second reflecting means for reflecting a bottom screen image comprising a left-eye image; and the reflected by the first reflecting means. A front screen on which a front screen image is projected to form a parallax image composed of the front screen right eye image and the front screen left eye image, and the bottom screen image reflected by the second reflecting means Is projected, a bottom screen on which a parallax image composed of the bottom-screen right-eye image and the bottom-screen left-eye image is formed, and the front screen and the front of the parallax images projected on the bottom screen A right-eye transmission unit that transmits only the right-eye image for the screen and the right-eye image for the bottom screen; and the left-eye image for the front screen and the bottom screen among the parallax images projected on the front screen and the bottom screen For left eye A parallax image selection unit having a left-eye transmission unit that transmits only the image, and the right-eye image and the left-eye image emitted from the display unit are the front-screen image and the bottom-screen image. The bottom screen image is divided into two regions, and the front screen image is reflected an odd number of times by the first reflecting means and projected onto the front screen. When the image is reflected an even number of times by the second reflecting means and projected onto the bottom screen, and the front screen image is reflected an even number of times by the first reflecting means and projected onto the front screen, The bottom screen image is reflected an odd number of times by the second reflecting means, and the bottom screen image is reflected. When projected cleanly, the image is inverted upside down with respect to the front screen image.

  According to this configuration, the image for the right eye emitted from the first display unit and the image for the left eye emitted from the second display unit are reflected by the reflecting unit and projected onto the first screen and the second screen. That is, in the present invention, the image emitted from the display means is refracted (reflected) by the reflecting means and projected onto the screen. As a result, the projection space can be reduced as compared with the case of directly projecting an image from the back side of the screen. In addition, according to the present invention, a parallax image can be formed by two display units, the first display unit and the second display unit, to realize a stereoscopic image. Therefore, it is possible to reduce the thickness and the size of the stereoscopic image display device and to reduce the cost.

  In the stereoscopic image display apparatus according to the present invention, the first screen until the first screen right-eye image emitted from the first display means is projected onto the first screen through the first reflecting means. The optical path length of the optical axis of the right eye image and the second screen right eye image emitted from the first display means until the second screen right eye image is projected onto the second screen through the second reflecting means. It is also preferable that the optical path length of the optical axis of the two-screen right-eye image is the same.

  According to this configuration, the optical path length of the optical axis of the right-eye image from the first display means through the first reflection means to the first screen, and the first display means through the second reflection means. Since the optical path length of the optical axis of the right-eye image until it is projected on the second screen is optically equidistant, the focus of each image projected on each screen is the same. Thereby, it is possible to prevent blurring of the right-eye image projected on both the first screen and the second screen.

  In the stereoscopic image display device of the present invention, the first screen until the left-eye image for the first screen emitted from the second display means is projected onto the first screen through the first reflecting means. The optical path length of the optical axis of the left-eye image and the second screen image until the second-screen left-eye image emitted from the second display means is projected onto the second screen via the second reflecting means. It is also good that the optical path length of the optical axis of the left-eye image for two screens is the same.

  According to this configuration, the optical path length of the optical axis of the image for the left eye from the second display unit through the first reflection unit to the first screen, and the second display unit through the second reflection unit. Since the optical path length of the optical axis of the left-eye image until it is projected on the second screen is optically equidistant, the focus of each image projected on each screen is the same. Thereby, blurring of the image for the left eye projected on both the first screen and the second screen can be prevented.

  The stereoscopic image display device according to the present invention includes a first polarizing plate that converts the right-eye image emitted from the first display means into polarized light in a first direction, and the left eye emitted from the second display means. A second polarizing plate that converts the image for use into polarized light in a second direction that intersects the first direction, and the right-eye transmission unit of the parallax image selection unit transmits the polarized light in the first direction, It is also preferable that the left-eye transmission part transmits polarized light in the second direction.

  According to this configuration, the right-eye image is polarized light in the first direction, and the left-eye image is polarized light in the second direction. Thereby, parallax images with different polarization directions can be formed on the screen for the right-eye image and the left-eye image. Therefore, a stereoscopic image can be obtained by selecting a certain polarization direction using the parallax image selection means.

  The stereoscopic image display apparatus according to the present invention also includes a first wavelength separation unit that allows light in a first wavelength band to pass through the right-eye image emitted from the first display unit, and a second display unit. Second wavelength separation means for passing light in the second wavelength band of the left eye image, and the right eye transmission portion of the parallax image selection means transmits light in the first wavelength band, It is also preferable that the transmission part transmits light in the second wavelength band.

  According to this configuration, image light in a predetermined wavelength band can be obtained by using, for example, a bandpass filter for the separating unit. For example, the image light emitted from the first display means is transmitted only through the red wavelength band, and the image light emitted from the second display means is transmitted only through the blue wavelength band. Thereby, red and blue parallax images are projected onto the screen, and an anaglyph stereoscopic image is obtained.

  In the stereoscopic image display device of the present invention, it is also preferable that at least one of the first reflecting means and the second reflecting means is arranged in plural on the back side of the first screen and the second screen.

  According to this configuration, since a plurality of reflecting means are provided, it is possible to project an image on each screen by refracting a plurality of times. Thereby, the projection space can be further narrowed, and further space saving can be achieved. Therefore, it is possible to reduce the thickness and the size of the stereoscopic image display device and to reduce the cost.

  In the stereoscopic image display device of the present invention, it is also preferable that the first screen is a front screen and the second screen is a bottom screen.

  According to this configuration, by using two screens, a front screen and a bottom screen, an optimal screen arrangement is obtained for the viewing angle of the observer. Thereby, a natural stereoscopic effect can be reproduced and a realistic stereoscopic image can be realized.

In the stereoscopic image display device of the present invention, the first screen right-eye image emitted from the first display means is reflected on the first screen by the first reflecting means to be reflected an odd number of times or an even number of times, and The second screen right-eye image emitted from the first display means is reflected by the second reflecting means when the first reflecting means is reflected an odd number of times and by an even number of times. In this case, when the image is reflected an odd number of times and projected onto the second screen, the image for the right eye for the first screen emitted from the first display means is used for the second screen emitted from the first display means. It is also preferable that the right-eye image is turned upside down and emitted.
In the stereoscopic image display device of the present invention, the first screen left-eye image emitted from the second display unit is reflected by the first reflecting unit an odd number of times or an even number of times and projected onto the first screen, and The second screen left-eye image emitted from the second display means is reflected by the second reflecting means when the first reflecting means is reflected an odd number of times, and is reflected an even number of times. In this case, when the image is reflected an odd number of times and projected onto the second screen, the left-eye image for the first screen emitted from the second display means is emitted from the second display means for the second screen. It is also preferable that the left-eye image is turned upside down and emitted.

  When the first reflecting means is an odd number of times and the second reflecting means is an even number of times, or when the first reflecting means is an even number of times and the second reflecting means is an odd number of times, the image light reflected from the plurality of reflecting mirrors is mutually reflected. Since the plurality of reflecting mirrors are arranged inside the casing so as not to be reflected or blocked by the reflecting mirrors, an image whose top and bottom (top and bottom) is inverted is projected on either the first screen or the second screen. According to the present invention, the second screen right-eye image (second screen left-eye image) emitted from the display means is inverted in advance and emitted. Therefore, the second screen right-eye image (second screen left-eye image) emitted by being inverted upside down under the conditions of the plurality of reflecting mirrors is projected upside down on the second screen. Accordingly, the first screen right-eye image (first screen left-eye image) and the second screen right-eye image (second screen left-eye image) in the same direction are displayed on the first screen and the second screen. Are combined and projected to form a continuous image.

  The image display apparatus of the present invention includes a display unit that emits a first screen image and a second screen image, a first reflection unit that reflects the first screen image emitted from the display unit, and the display. A second reflecting means for reflecting the second screen image emitted from the means, a first screen on which the first screen image reflected by the first reflecting means is projected, and the second reflecting means. And a second screen on which the second screen image reflected by the projector is projected.

  According to this configuration, each of the first screen image and the second screen image emitted from the display unit and dispersed is reflected by the reflecting unit and projected onto the first screen and the second screen. That is, in the present invention, the image emitted from the display means by the reflecting means is refracted (reflected) and projected onto the screen. As a result, the projection space can be reduced as compared with the case of directly projecting an image from the back side of the screen. Further, according to the present invention, the image emitted from one display means is separated into a first screen image and a second screen image and projected onto each of the first screen and the second screen. Therefore, it is possible to reduce the thickness and the size of the image display device and to reduce the cost.

  In the image display apparatus of the present invention, it is also preferable that at least one of the first reflecting means and the second reflecting means is arranged in plural on the back side of the first screen and the second screen.

  According to this configuration, since a plurality of reflecting means are provided, it is possible to project an image on each screen by refracting a plurality of times. Thereby, the projection space can be further narrowed, and further space saving can be achieved. Therefore, it is possible to reduce the thickness and the size of the image display device and to reduce the cost.

  In the image display device of the present invention, it is also preferable that the first screen is a front screen and the second screen is a bottom screen.

  According to this configuration, by using two screens, a front screen and a bottom screen, an optimal screen arrangement is obtained for the viewing angle of the observer. As a result, a natural and realistic image can be realized.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, an XYZ orthogonal coordinate system is set, and the positional relationship of each member will be described with reference to this XYZ orthogonal coordinate system. The predetermined direction in the horizontal plane is the X-axis direction, the direction orthogonal to the X-axis direction in the horizontal plane is the Y-axis direction, and the direction orthogonal to each of the X-axis direction and the Y-axis direction (that is, the vertical direction) is the Z-axis direction. To do.

[First Embodiment]
FIG. 1 is a perspective view illustrating a schematic configuration of a stereoscopic image display apparatus 1 according to the present embodiment. The stereoscopic image display device 1 of the present embodiment includes an image display device 2 for displaying a parallax image, and glasses 3 (parallax image selection means) for generating a stereoscopic image from the parallax image.

  As shown in FIG. 1, the glasses 3 are worn by an observer, and the right-eye transmission unit 31 that transmits only the right-eye image among the parallax images displayed on the screen, and the parallax image displayed on the screen. And a left-eye transmission unit 32 that transmits only the left-eye image. Specifically, the right-eye transmission unit 31 is formed with a polarization axis parallel to the X-axis direction that transmits only, for example, an s-polarized right-eye image. On the other hand, in the left-eye transmission part 32, for example, a polarization axis parallel to the Y-axis direction that transmits only the left-polarized image of p-polarized light is formed.

Next, the image display device 2 will be described.
As shown in FIG. 1, the image display device 2 includes screens 10 and 12 onto which images are projected, and a housing 20 provided on the back side of the screens 10 and 12.

  As shown in FIG. 1, the screens 10 and 12 include a front screen 10 (first screen) disposed on the front side of the observer, and a bottom screen 12 (second screen) disposed on the lower surface side of the observer. It has. The bottom screen 12 extends from the lower side of the front screen 10 to the viewer side, and the front screen 10 and the bottom screen 12 constitute a continuous screen.

  2A and 2B are views of the front screen 10 and the bottom screen 12 as viewed from the viewer side. As shown in FIG. 2A, a front screen right-eye image 42 (first screen right-eye image) is projected onto the front screen 10, and a bottom screen right-eye image 44 (second screen) is projected onto the bottom screen 12. Right-eye image) is projected. Then, a continuous image (dice) 46 is formed by the front screen right-eye image 42 and the bottom screen right-eye image 44. The arrow direction of the front screen 10 shown in FIG. 2 and FIG. 3 to be described later is a direction in which the image becomes the front when the observer observes the image. In the present embodiment, this arrow direction is referred to as an image front direction d1. Similarly, the arrow direction of the bottom screen 12 is referred to as an image front direction d2. The left-eye image projected in FIG. 2B is the same as the above-described right-eye image (first-screen left-eye image, second-screen left-eye image), and will not be described.

Next, the structure inside the housing 20 of the image display apparatus 2 of the present embodiment will be described in detail.
FIG. 3 is a cross-sectional view schematically showing a schematic configuration of the inside 20 of the case of the image display device 2 of the present embodiment.
In the housing 20 of the image display device 2, a right-eye image projector 24 and a left-eye image projector 25 for generating an image to be projected on the screen, and the generated image are reflected and guided in the screen direction. The front screen reflecting mirror 14 (first reflecting means), the first bottom screen reflecting mirror 16 (second reflecting means), and the second bottom screen reflecting mirror 18 (second reflecting means) are provided. In the following, first, the right-eye image projector 24 will be described.

The right-eye image projector 24 is a projector for generating a right-eye image, and is disposed on the lower rear side of the housing 20 with the exit side inclined at a predetermined angle with respect to the projection surfaces of the screens 10 and 12. ing. As the right-eye image projector 24, a three-plate type (3LCD system) liquid crystal projector using three liquid crystal light valves as light modulation elements is used. In this method, light emitted from a light source is transmitted through a dichroic mirror only through light of a specific wavelength to be separated into R (red), G (green), and B (blue), and the light transmitted through each light valve is transmitted. After combining with a dichroic prism, it is projected onto a screen. It is also possible to use a single-plate liquid crystal projector that uses one liquid crystal light valve as the light modulation element, or a projector that uses a micromirror array device as the light modulation element.
A first polarizing plate 50 that transmits and emits only s-polarized light parallel to the X-axis direction (first direction) is disposed on the exit side of the right-eye image projector 24.

4A is a plan view schematically showing a liquid crystal light valve display area 36 of the right-eye image projector 24, and FIG. 4B is a plan view schematically showing a liquid crystal light valve display area 37 of the left-eye image projector 25. As shown in FIG. As shown in FIG. 4, the display area 36 of the right-eye image projector 24 includes a front screen display area 38 that outputs a front screen image projected on the front screen 10 and a bottom screen image projected on the bottom screen 12. Is divided into a bottom screen display area 40 for outputting. As a result, the right-eye image projector 24 can emit independent images for the front screen image and the bottom screen image.
In the present embodiment, as shown in FIGS. 2 and 4, the upper and lower portions of the front screen 10 correspond to the upper and lower portions of the front screen display area 36, respectively. Further, the viewer side (front side) of the bottom screen 12 and the opposite direction side (back side) of the viewer correspond to the lower side and the upper side of the bottom screen display region 36. Accordingly, the arrow directions shown in FIGS. 2 and 4 also correspond.

  Returning to FIG. 3, the front screen reflecting mirror 14 is arranged in the emission direction of the front screen image and on the back side of the front screen 10. The first bottom screen reflecting mirror 16 is arranged in the emission direction of the bottom screen image. The second bottom screen reflection mirror 18 is disposed in the reflection direction of the first bottom screen reflection mirror 16 and below the bottom screen 12. That is, in the present embodiment, an odd number of front screen reflecting mirrors 14 are arranged, and an even number of bottom screen reflecting mirrors 16 and 18 are arranged. Thus, only the front screen image 42 is incident and reflected on the front screen reflecting mirror 14, and only the bottom screen image 44 is incident and reflected on the bottom screen reflecting mirror.

Next, the operation until the right-eye image is emitted from the right-eye image projector 24 and projected onto the front screen 10 and the bottom screen 12 will be described.
First, as shown in FIG. 4A, the right-eye image projector 24 emits a front screen image 42 generated in the same direction as the image front direction d1 of the front screen 10 shown in FIG. On the other hand, as shown in FIG. 4A, the right-eye image projector 24 generates a bottom screen image 44 generated by upside down in the direction opposite to the image front direction d2 of the bottom screen 12 shown in FIG. Exit.

The front screen image 42 emitted from the right-eye image projector 24 is incident on the front screen reflecting mirror 14. The incident front screen image 42 is reflected by the front screen reflecting mirror 14 and projected onto the front screen 10.
As shown in FIG. 2A, the image direction of the front screen image 42 projected on the front screen 10 is the image of the front screen image 42 emitted from the right-eye image projector 24 shown in FIG. Match the direction. Accordingly, the image direction of the front screen image 42 projected on the front screen 10 coincides with the image front direction d1 of the front screen 10.

On the other hand, the bottom screen image 44 emitted from the right-eye image projector 24 is incident on the first bottom screen reflecting mirror 16. The incident bottom screen image 44 is reflected by the first bottom screen reflecting mirror 16, enters the second bottom screen reflecting mirror 18, is further reflected by the second bottom screen reflecting mirror 18, and is projected onto the bottom screen 12. As shown in FIG. 2A, the image direction of the bottom screen image 44 projected onto the bottom screen 12 is the image of the bottom screen image 44 emitted from the right-eye image projector 24 shown in FIG. The direction is the opposite direction (upside down). As a result, the image direction of the bottom screen image 44 projected onto the bottom screen 12 coincides with the image front direction d2 of the bottom screen 12.
In this way, on the front screen 10 and the bottom screen 12, a continuous image 47 (dice) that coincides with the image front directions d1 and d2 of the screen is displayed.

In the present embodiment, the optical path length of the optical axis of each image from each projector to each screen is related as follows.
The screen 22 shown in FIG. 3 is a virtual screen when the right-eye image 46 emitted from the right-eye image projector 24 is projected without being refracted by the reflection mirror. In the present embodiment, the optical path length of the optical axis O of the front screen image 42 emitted from the right eye image projector 24, reflected by the front screen reflecting mirror 14 and projected onto the front screen 10, and the right eye image projector 24. The optical path length of the optical axis P of the bottom screen image 44 emitted and reflected by the first bottom screen reflecting mirror 16 and the second bottom screen reflecting mirror 18 and projected onto the bottom screen 12 is the optical path of the virtual optical axis L. It is set to be the same as the length. Therefore, the optical path length of the optical axis O of the front screen image 42 projected onto the front screen 10 is the same as the optical path length of the optical axis P of the bottom screen image 44 projected onto the bottom screen 12.
In the present embodiment, the front screen reflection mirror 14, the bottom screen first reflection mirror, the optical path length of the optical axis O of the front screen image 42 and the optical path length of the optical axis P of the bottom screen image 44 are the same. The bottom screen second reflecting mirror, the front screen 10 and the bottom screen 12 are arranged at predetermined positions. Further, the optical path lengths O and P of the optical axis of the right eye image 46 until the right eye image 46 is projected onto the screens 10 and 12 and the left eye until the left eye image 48 is projected onto the screens 10 and 12. It is also possible to make the optical path lengths O and P of the optical axis of the working image 48 the same.

Next, the left-eye image projector 25 will be described.
The left-eye image projector 25 is provided on the back side (Z-axis direction) in FIG. 3 of the right-eye image projector 24, and has the same configuration as the right-eye image projector 24 described above. As shown in FIG. 3, a second polarizing plate 52 that transmits and emits only p-polarized light parallel to the Y-axis direction (second direction) is disposed on the emission side of the left-eye image projector 25. Further, the front screen reflection mirror 14, the bottom screen reflection mirror, the front screen 10, and the bottom screen 12 are used in common with the right-eye image projector 24.
Accordingly, the front screen image 42 (first screen left eye image) emitted from the left eye image projector 25 is reflected by the front screen reflecting mirror 14 and projected onto the front screen 10. Similarly, the bottom screen image 44 (second screen left-eye image) is reflected by the first bottom screen reflecting mirror 16 and the second bottom screen reflecting mirror 18 and projected onto the bottom screen 12. At this time, in this embodiment, the optical path length of the optical axis of the front screen image 42 and the optical path length of the optical axis of the bottom screen image 44 are the same.

  In this manner, a parallax image including the right-eye image 46 and the left-eye image 48 shown in FIGS. 2A and 2B is formed on each of the front screen 10 and the bottom screen 12. When the observer wears the glasses 3 and observes the parallax image, the right-eye image out of the parallax images projected on the front screen 10 and the bottom screen 12 passes through the right-eye transmissive part of the glasses 3 and the right eye of the observer. The image for the right eye arrives. On the other hand, of the parallax images projected on the front screen 10 and the bottom screen 12, the left eye image passes through the left eye transmission part of the glasses 3, and the left eye image reaches the left eye of the observer. As a result, independent images are supplied to the viewer's right eye and left eye. As a result, the viewer's brain combines the right-eye image 46 and the left-eye image 48, and the viewer recognizes the parallax images projected on the front screen 10 and the bottom screen 12 as a stereoscopic image.

  By the way, in the present embodiment, a projector or the like is arranged so that the optical axis of the image emitted from the projector is in a non-vertical direction with respect to each projection surface of each screen, and image light is transmitted to each screen from a predetermined angle. By projecting, the image display device is reduced in thickness. However, in this case, since image light is projected on each screen from a non-perpendicular direction, distortion occurs in the image projected on each screen. As a method for correcting this distortion, a method disclosed in Japanese Patent Application Laid-Open No. 2002-139794 can be employed. FIG. 5 is a simplified diagram of the principle of a shift optical system that corrects this distortion. For example, when the right-eye image projector 24 includes a light source device 64, a liquid crystal light valve 62, and a projection system 60 (enlargement system), the light exit surface 62A of the liquid crystal light valve 62 is an optical axis L2 of the projection system 60. It is arranged in the vertical direction. Further, the light source device 64 is arranged so that the central axis (see the optical path L1) of the light beam emitted from the liquid crystal light valve 62 and the optical axis L2 of the projection system 60 are shifted. As a result, light (green light) is emitted from the light source device 64 in a non-perpendicular direction to the light incident surface 62B of the liquid crystal light valve 62. With this method, the distortion projected on each screen is corrected in this embodiment.

  In addition, the central axis of the light beam emitted from the liquid crystal light valve 5 and the optical axis of the projection system 60 are aligned, and the light emission surface of the liquid crystal light valve 62 is arranged non-perpendicular to the optical axis of the projection system 60. It is also possible to construct an optical system (so-called tilt optical system) that corrects the distortion of the projected image.

  According to the present embodiment, the right-eye image 46 emitted from the right-eye image projector 24 and the left-eye image 48 emitted from the left-eye image projector 25 are reflected by the reflection mirror and are reflected on the front screen 10 and the bottom screen 12. Projected. That is, in this embodiment, the image is refracted (reflected) by the reflection mirror and projected onto the screen. Further, according to the present embodiment, a stereoscopic image can be realized by forming a parallax image by using two display units, ie, a right-eye image projector and a left-eye image projector. As a result, the projection space can be reduced as compared with the case of directly projecting an image from the back side of the screen. Therefore, the stereoscopic image display device 1 can be reduced in thickness and size, and the cost can be reduced.

  Further, according to the present embodiment, the optical path length of the optical axis of the right-eye image (left-eye image) from the right-eye image projector 24 (left-eye image projector 25) to the projection onto the front screen 10 via the front reflection mirror. And the optical path length of the optical axis of the right-eye image (left-eye image) from the right-eye image projector 24 (left-eye image projector 25) to the bottom screen 12 through the bottom reflection mirror is optically equidistant. Therefore, the focus of each image projected on the front screen 10 and the bottom screen 12 becomes the same. Thereby, it is possible to prevent blurring of the right-eye image (left-eye image) projected on both the front screen 10 and the bottom screen.

  Furthermore, according to the present embodiment, by using two screens of the front screen 10 and the bottom screen 12, an optimal screen arrangement can be obtained with respect to the viewing angle of the observer. Thereby, a natural stereoscopic effect can be reproduced and a realistic stereoscopic image can be realized.

  Furthermore, in the stereoscopic image display device 1 according to the present embodiment, since the odd number of front screen reflecting mirrors 14 and the even number of bottom screen reflecting mirrors 16 and 18 are arranged, the front screen right eye image 42 (front screen left eye Image) is reflected an odd number of times, and the bottom screen right-eye image 44 (bottom screen left-eye image) is reflected an even number of times and projected onto the screens 10 and 12. Therefore, in the present embodiment, the bottom screen right-eye image 44 (bottom screen left-eye image) emitted from the projector 24 is inverted in advance and emitted. As a result, the front screen right eye image 42 (front screen left eye image) and the bottom screen right eye image 44 (bottom screen left eye image) in the same direction are combined with the front screen 10 and the bottom screen 12. Thus, a continuous right-eye image 46 (left-eye image) is formed.

[Second Embodiment]
Hereinafter, the present embodiment will be described with reference to the drawings.
In the above-described embodiment, a parallax image is projected on the screen using the polarization-separated right-eye image and left-eye image, and the stereoscopic image is visually recognized using glasses that transmit only polarized light in a predetermined direction. In contrast, in the present embodiment, a so-called anaglyph method is used in which a parallax image is projected on a screen using a right-eye image and a left-eye image that are wavelength-separated, and a stereoscopic image is visually recognized using glasses that transmit only wavelengths in a predetermined direction. Is different in that it is adopted. The other basic configurations of the stereoscopic image display apparatus are the same as those of the first embodiment, and common constituent elements are denoted by the same reference numerals and detailed description thereof is omitted.

FIG. 6 is a cross-sectional view schematically showing a schematic configuration of the inside 20 of the case of the image display device 2 of the present embodiment.
In the present embodiment, the first filter 28 (first wavelength separation means) that transmits only the wavelength in the red wavelength band is disposed on the emission side of the right-eye image projector 24. As a result, only the red wavelength of the right-eye image 46 emitted from the right-eye image projector 24 is transmitted, reflected by the reflecting mirror, and projected onto the front screen 10 and the bottom screen 12, respectively. On the other hand, the second filter 30 (second wavelength separation means) that transmits only the wavelength in the wavelength band of blue (color complementary to red) is disposed on the emission side of the left-eye image projector 25. Thus, only the blue wavelength of the left-eye image 48 emitted from the left-eye image projector 25 is transmitted, reflected by the reflection mirror, and projected onto the front screen 10 and the bottom screen 12. In this manner, a parallax image composed of the red right-eye image 46 and the blue left-eye image 48 is formed on the front screen 10 and the bottom screen 12.

  In the glasses worn by the observer, a blue film is attached to the right-eye transmission part 31 and a red film is attached to the left-eye transmission part 32. Therefore, when the observer wears spectacles and observes the parallax image, the red right-eye image 46 is transmitted through the right-eye transmission unit 31 of the spectacles, and the red right-eye image 46 reaches the right eye of the observer. On the other hand, the blue left-eye image 48 is transmitted through the left-eye transmission part 32 of the glasses, and the blue left-eye image 48 reaches the left eye of the observer. In this way, independent images are supplied to the viewer's right eye and left eye. As a result, the viewer's brain combines the right-eye image 46 and the left-eye image 48, and the viewer recognizes the parallax images projected on the front screen 10 and the bottom screen 12 as a stereoscopic image.

  According to this embodiment, the anaglyph type stereoscopic image display device 1 can be realized. Similarly to the above embodiment, the projection space can be narrowed because the image emitted from the projector is refracted by the reflecting mirror and projected onto the screen. Therefore, the stereoscopic image display device 1 can be reduced in thickness and size, and the cost can be reduced.

[Third Embodiment]
Hereinafter, the present embodiment will be described with reference to the drawings.
In the above embodiment, the front screen image is reflected once by the reflection mirror and projected onto the front screen, and the bottom screen image is reflected twice by the reflection mirror and projected onto the front screen. On the other hand, the present embodiment is different in that the bottom screen image is reflected three times and projected onto the bottom screen. The other basic configurations of the stereoscopic image display apparatus are the same as those of the first embodiment, and common constituent elements are denoted by the same reference numerals and detailed description thereof is omitted.

  FIG. 7 is a cross-sectional view schematically showing a schematic configuration of the image display device 2 of the present embodiment. 8A is a plan view schematically showing a display region 36 of the liquid crystal light valve of the right-eye image projector 24, and FIG. 8B is a plan view schematically showing a display region 37 of the liquid crystal light valve of the projector 25 for left-eye image. FIGS. 9A and 9B are plan views schematically showing the front screen 10 and the bottom screen 12 of the present embodiment.

  As shown in FIG. 7, the first bottom screen reflecting mirror 16 is arranged in the emission direction of the bottom screen image 44. The second bottom screen reflection mirror 18 is disposed in the reflection direction of the first bottom screen reflection mirror 16. Further, the third bottom screen reflection mirror 34 (second reflection means) is disposed in the reflection direction of the second bottom screen reflection mirror 18 and below the bottom screen 12. That is, in the present embodiment, an odd number of front screen reflecting mirrors 14 are arranged, and an odd number of bottom screen reflecting mirrors 16, 18, and 34 are arranged.

Next, the operation until the right-eye image is emitted from the right-eye image projector 24 and projected onto the front screen 10 and the bottom screen 12 will be described. Note that the left-eye image projector 25 has the same operation as the right-eye image projector 24, and a description thereof will be omitted.
As shown in FIG. 8A, the right-eye image projector 24 has a front screen image 42 generated in the same direction as the image front direction d1 of the front screen 10 and the image front direction d2 of the bottom screen 12 in the same direction. The generated bottom screen image 44 is emitted.

The front screen image 42 emitted from the right-eye image projector 24 is incident on the front screen reflecting mirror 14. The incident front screen image 42 is reflected by the front screen reflecting mirror 14 and projected onto the front screen 10.
As shown in FIG. 9A, the image direction of the front screen image 42 projected on the front screen 10 is the image of the front screen image 42 emitted from the right-eye image projector 24 shown in FIG. Match the direction. Accordingly, the image direction of the front screen image 42 projected on the front screen 10 coincides with the image front direction d1 of the front screen 10.

  Further, the bottom screen image 44 emitted from the right-eye image projector 24 is incident on the first bottom screen reflecting mirror 16. The incident bottom screen image 44 is reflected by the first bottom screen reflecting mirror 16 and enters the second bottom screen reflecting mirror 18. The incident bottom screen image 44 is reflected by the second bottom screen reflecting mirror 18, further reflected by the third bottom screen reflecting mirror 34, and projected onto the bottom screen 12. As shown in FIG. 9A, the image direction of the bottom screen image 44 projected onto the bottom screen 12 is the image of the bottom screen image 44 emitted from the right-eye image projector 24 shown in FIG. Match the direction. Accordingly, the image direction of the bottom screen image 44 projected onto the bottom screen 12 matches the image front direction d2 of the bottom screen 12. In this way, the front screen 10 and the bottom screen 12 display a continuous image 47 (dice) that coincides with the image front d1 and d2 directions of the screen.

  Also in the present embodiment, the same effects as those in the above embodiment can be obtained. That is, since the image emitted from the projector is refracted multiple times by the reflection mirror and projected onto the screen, the projection space can be narrowed. Therefore, the stereoscopic image display device 1 can be reduced in thickness and size, and the cost can be reduced.

  Furthermore, the stereoscopic image display device 1 of the present embodiment has an odd number of front screen reflecting mirrors 14 and an odd number of bottom screen reflecting mirrors 16, 18, 34. Left-eye image) is reflected an odd number of times, and the bottom screen right-eye image 44 (bottom screen left-eye image) is reflected an odd number of times and projected onto the screens 10 and 12. Therefore, in the present embodiment, the front screen right-eye image 42 (front screen left-eye image) and the bottom screen right-eye image 44 (bottom screen left-eye image) emitted from the projector 24 are emitted in the same image direction. I am letting. As a result, the front screen right eye image 42 (front screen left eye image) and the bottom screen right eye image 44 (bottom screen left eye image) in the same direction are combined with the front screen 10 and the bottom screen 12. Thus, a continuous right-eye image 46 (left-eye image) is formed.

[Fourth Embodiment]
Hereinafter, the present embodiment will be described with reference to the drawings.
In the above embodiment, the front screen image is reflected once by the reflection mirror and projected onto the front screen, and the bottom screen image is reflected twice by the reflection mirror and projected onto the front screen. On the other hand, the present embodiment is different in that the front screen image is reflected twice by the reflection mirror and projected onto the front screen, and the bottom screen image is reflected three times and projected onto the bottom screen. The other basic configurations of the stereoscopic image display apparatus are the same as those of the first embodiment, and common constituent elements are denoted by the same reference numerals and detailed description thereof is omitted.

  FIG. 10 is a cross-sectional view schematically showing a schematic configuration of the image display device 2 of the present embodiment. 11A is a plan view schematically showing a display area 36 of the liquid crystal light valve of the right-eye image projector 24, and FIG. 11B is a plan view schematically showing a display area 37 of the liquid crystal light valve of the projector 25 for the left-eye image. 12A and 12B are plan views schematically showing the front screen 10 and the bottom screen 12 of the present embodiment.

  As shown in FIG. 10, the first front reflecting mirror 14 (first reflecting means) is arranged in the emission direction of the front screen image 42. The second front reflection mirror 54 (first reflection means) is disposed in the reflection direction of the first front reflection mirror 14 and on the back side of the front screen 10. The first bottom screen reflection mirror 16 is disposed in the emission direction of the bottom screen image 44. The second bottom screen reflection mirror 18 is disposed in the reflection direction of the first bottom screen reflection mirror 16. Further, the third bottom screen reflection mirror 34 is arranged in the reflection direction of the second bottom screen reflection mirror 18 and below the bottom screen 12. That is, in the present embodiment, an even number of front screen reflecting mirrors 14 and 54 are arranged, and an odd number of bottom screen reflecting mirrors 16, 18 and 34 are arranged.

Next, the operation until the right-eye image is emitted from the right-eye image projector 24 and projected onto the front screen 10 and the bottom screen 12 will be described. Note that the left-eye image projector 25 has the same operation as the right-eye image projector 24, and a description thereof will be omitted.
As shown in FIG. 11A, the right-eye image projector 24 emits a front screen image 42 generated in the same direction as the image front direction d1 of the front screen 10. On the other hand, as shown in FIG. 11A, the right-eye image projector 24 emits a bottom screen image 44 generated by upside down in a direction opposite to the image front direction d2 of the bottom screen 12.

  The front screen image 42 emitted from the right-eye image projector 24 is incident on the front screen reflecting mirror 14. The incident front screen image 42 is reflected by the first front screen reflecting mirror 14 and the second front screen reflecting mirror 54 and projected onto the front screen 10. As shown in FIG. 12A, the image direction of the front screen image 42 projected on the front screen 10 is the image of the front screen image 42 emitted from the right-eye image projector 24 shown in FIG. Match the direction. Accordingly, the direction 42 of the front screen image projected on the front screen 10 coincides with the image front direction d1 of the front screen 10.

  Further, the bottom screen image 44 emitted from the right-eye image projector 24 is incident on the first bottom screen reflecting mirror 16. The incident bottom screen image 44 is reflected by the first bottom screen reflecting mirror 16 and enters the second bottom screen reflecting mirror 18. The incident bottom screen image 44 is reflected by the second bottom screen reflecting mirror 18, further reflected by the third bottom screen reflecting mirror 34, and projected onto the bottom screen 12. As shown in FIG. 12A, the image direction of the bottom screen image 44 projected onto the bottom screen 12 is the image of the bottom screen image 44 emitted from the right-eye image projector 24 shown in FIG. The direction is the opposite direction (upside down). As a result, the direction 44 of the bottom screen image projected onto the bottom screen 12 coincides with the image front direction d2 of the bottom screen 12. In this way, on the front screen 10 and the bottom screen 12, a continuous image 47 (dice) that coincides with the image front directions d1 and d2 of the screen is displayed.

  Also in the present embodiment, the same effects as those in the above embodiment can be obtained. That is, since the image emitted from the projector is refracted multiple times by the reflection mirror and projected onto the screen, the projection space can be narrowed. Therefore, the stereoscopic image display device 1 can be reduced in thickness and size, and the cost can be reduced.

  Further, in the stereoscopic image display device 1 of the present embodiment, since the even number of front screen reflecting mirrors 14 and 54 are arranged and the odd number of bottom screen reflecting mirrors 16, 18 and 34 are arranged, the front screen right-eye image 42 ( The front screen left-eye image) is reflected even times, and the bottom screen right-eye image 44 (bottom screen left-eye image) is reflected odd times and projected onto the screens 10 and 12. Therefore, in the present embodiment, the bottom screen right-eye image 44 (bottom screen left-eye image) emitted from the projector 24 is inverted in advance and emitted. As a result, the front screen right eye image 42 (front screen left eye image) and the bottom screen right eye image 44 (bottom screen left eye image) in the same direction are combined with the front screen 10 and the bottom screen 12. Thus, a continuous right-eye image 46 (left-eye image) is formed.

It should be noted that the technical scope of the present invention is not limited to the above-described embodiments, and includes those in which various modifications are made to the above-described embodiments without departing from the spirit of the present invention.
For example, in the above embodiment, a parallax image is formed on the screen, and a stereoscopic image device is realized using polarized glasses. On the other hand, an image emitted from one projector is separated into a front screen image and a bottom screen image, the front screen image is projected onto the front screen, and the bottom screen image is projected onto the bottom screen. Is also possible. According to this, although a stereoscopic image cannot be obtained, the image emitted from the projector is refracted a plurality of times by the reflection mirror and projected onto the screen, so that the projection space can be narrowed. In addition, an image can be projected on two screens with one projector. Therefore, it is possible to reduce the thickness and cost of the image display device, and to realize a realistic image. In addition, as described in the above embodiment, a plurality of reflection mirrors can be arranged on the back surface of the screen. At this time, the reflecting mirror is arranged at a predetermined position so that the optical path length of the optical axis of the front screen image from the projector until it is projected onto the screen is the same as the optical path length of the optical axis of the bottom screen image. To do.

It is a perspective view which shows schematic structure of a stereo image display apparatus. It is a figure which shows the image projected on the screen. It is sectional drawing which shows schematic structure of the image display apparatus which concerns on 1st Embodiment. FIG. 3 is a plan view showing a display area of the liquid crystal light valve. It is a figure which shows the principle of the shift optical system which correct | amends the distortion projected on a screen. It is sectional drawing which shows schematic structure of the image display apparatus which concerns on 2nd Embodiment. It is sectional drawing which shows schematic structure of the image display apparatus which concerns on 3rd Embodiment. FIG. 3 is a plan view showing a display area of the liquid crystal light valve. It is a figure which shows the image projected on the screen similarly. It is sectional drawing which shows schematic structure of the image display apparatus which concerns on 4th Embodiment. FIG. 3 is a plan view showing a display area of the liquid crystal light valve. It is a figure which shows the image projected on the screen similarly.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Stereoscopic image display apparatus, 2 ... Image display apparatus, 3 ... Glasses (parallax image selection means), 10 ... Front screen (1st screen), 12 ... Bottom screen (2nd screen), 14 ... Front screen reflective mirror ( First reflecting means) 16 First bottom screen reflecting mirror (second reflecting means) 18 Second bottom screen reflecting mirror (second reflecting means) 24 Right image projector (first displaying means) 25 ... left-eye image projector (second display means) 28 ... first filter (first wavelength separation means) 30 ... second filter (second wavelength separation means) 31 ... right-eye transmission section 32 ... left-eye transmission 34: third bottom screen reflecting mirror (second reflecting means), 42: front screen image (first screen right eye image), 44 ... bottom screen image (first screen right eye image) 46 ... right eye image 48 ... left eye image 50 ... first polarizing plate 52 ... second polarizing plate 54 ... second front screen reflecting mirror ( First reflecting means), L, O, P ... optical axis

Claims (6)

First display means for emitting a right-eye image comprising a front- screen right-eye image and a bottom- screen right-eye image, a left-eye image comprising a front- screen left-eye image and a bottom- screen left-eye image Second display means for emitting an image;
A first reflecting means for reflecting the front screen image consisting of the emitted said front screen for the left-eye image from the first emitted from the display unit the said front screen for the right-eye image and the second display means, said first a second reflection means for reflecting an image for bottom screen consisting of the emitted said bottom screen for the left-eye image from the right eye image and the second display means for the bottom screen is emitted from the first display means,
Wherein said front screen image that has been reflected by the first reflecting means is projected, a front screen parallax images are formed consisting of the front screen for the right eye image and the front screen for the left eye image, the second reflecting a bottom screen the image for bottom screen that has been reflected is projected, parallax images consisting of the right-eye image for the bottom screen and the bottom screen for the left eye image is formed by means,
And the right eye transmission portion that transmits only the front screen and the for front screen right eye image and the right-eye image for the bottom screen of the parallax images projected on the bottom screen, projected on the front screen and the bottom screen A parallax image selection means including a left-eye transmission unit that transmits only the front- screen left-eye image and the bottom- screen left-eye image among the parallax images thus obtained ,
The image for the right eye and the image for the left eye emitted from the display means are divided into two parts to be the front screen image and the bottom screen image,
The region to be the bottom screen image is
The front screen image is reflected an odd number of times by the first reflecting means and projected onto the front screen, while the bottom screen image is reflected an even number of times by the second reflecting means and projected onto the bottom screen. And the front screen image is reflected an even number of times by the first reflecting means and projected onto the front screen, while the bottom screen image is reflected an odd number of times by the second reflecting means. A stereoscopic image display device, wherein the stereoscopic image display device is vertically inverted with respect to the front screen image when projected onto the front screen . The optical path length of the optical axis of the right-eye image for the front screen until the right-eye image for the front screen emitted from the first display means is projected onto the front screen via the first reflecting means; the optical path length of the optical axis of the bottom screen for the right-eye image to the right eye image for the bottom screen that has been emitted is projected on the bottom screen via the second reflecting means from the first display means, but the same The stereoscopic image display apparatus according to claim 1, wherein The optical path length of the optical axis of the left-eye image for the front screen until the left-eye image for the front screen emitted from the second display means is projected onto the front screen via the first reflecting means; the optical path length of the optical axis of the bottom screen for left-eye image to the left eye and the image for the bottom screen that has been emitted is projected on the bottom screen via the second reflecting means from the second display means, but the same The stereoscopic image display device according to claim 1, wherein the stereoscopic image display device is a display device. A first polarizing plate that converts the right-eye image emitted from the first display means into polarized light in a first direction, and the left-eye image emitted from the second display means intersect in the first direction. A second polarizing plate for converting into polarized light in the second direction,
The right-eye transmission unit of the parallax image selection unit transmits the polarized light in the first direction,
4. The stereoscopic image display device according to claim 1, wherein the left-eye transmission unit transmits polarized light in the second direction. 5. First wavelength separation means for passing light in the first wavelength band in the right-eye image emitted from the first display means, and second wavelength band in the left-eye image emitted from the second display means. A second wavelength separation means for passing the light of
The right-eye transmission unit of the parallax image selection unit transmits light in the first wavelength band,
5. The stereoscopic image display device according to claim 1, wherein the left-eye transmission unit transmits light in the second wavelength band. 6. 6. The device according to claim 1, wherein at least one of the first reflecting unit and the second reflecting unit is disposed on the back side of the front screen and the bottom screen. 3D image display device.

Images