JP2014202861A - Stereoscopic video projection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stereoscopic video projection device which is capable of reducing the number of projection parts, while suppressing the size of the whole device from being increased and suppressing the configuration of the whole device from being complicated.SOLUTION: A stereoscopic video projection device 100 includes a scan type projector 1 projecting a stereoscopic projection image 11 and a mirror part 2 which has a reflection surface 21 arranged circularly and in which the scan type projector 1 is located inside the reflection surface 21 arranged circularly and is configured so that a light beam corresponding to the stereoscopic projection image 11 projected from the scan type projector 1 is reflected by the reflection surface 21 arranged circularly of the mirror part 2, to make the light beam corresponding to the stereoscopic projection image 11 incident on eyes of an observer 12.

Description

  The present invention relates to a stereoscopic video projection device, and more particularly to a stereoscopic video projection device including a projection unit that projects a stereoscopic projection image.

  2. Description of the Related Art Conventionally, a stereoscopic video projection apparatus including a projection unit that projects a stereoscopic projection image is known (see, for example, Patent Document 1).

  In Patent Document 1, as a first embodiment, a light beam controller having a cone shape or a columnar shape, and an outer surface of the light beam controller for irradiating a plurality of light beams over the entire outer peripheral surface of the light beam controller. There is disclosed a stereoscopic display (stereoscopic image projection apparatus) including a large number of projectors (projecting units) arranged adjacent to each other in a circumferential shape so as to surround a light beam controller. This three-dimensional display is configured to irradiate light beams from a large number of projectors on the outer peripheral surface of the light beam controller so as to transmit the light beam controller and present a three-dimensional image above the light beam controller with each light beam. . In addition, as a second embodiment, by providing a rotation mechanism that rotates the projector around the central axis of the cone-shaped or columnar beam controller in the stereoscopic display, the outer periphery of the beam controller can be reduced with a smaller number of projectors. The structure which irradiates a whole surface with a light ray is disclosed.

JP 2012-13788 A

  However, in the stereoscopic display according to the first embodiment of Patent Document 1, since the projector is disposed outside the cone-shaped or column-shaped light controller, a stereoscopic image is presented above the center of the light controller. In order to achieve this, it is necessary to collect the light beam that has passed through the light beam controller above the center of the light beam controller. For this reason, it is necessary to make the light emitted from the projector arranged outside the light controller incident at an angle close to perpendicular to the irradiation surface (outer peripheral surface) of the light controller. There is an inconvenience of increasing. In addition, since the projector is disposed outside the cone-shaped or columnar beam controller, the arrangement space for the projector and the beam controller is increased, which disadvantageously increases the size of the entire apparatus. Further, in the configuration of the second embodiment, by rotating the projector around the central axis of the light controller, it is possible to irradiate the entire area of the outer peripheral surface of the light controller with a plurality of fewer projectors. Since it is necessary to provide a rotation drive mechanism for rotating the projector, there is a disadvantage that the configuration of the entire apparatus becomes complicated. That is, the three-dimensional display disclosed in Patent Document 1 has a problem in that it is not possible to reduce the number of projectors while suppressing an increase in the size of the entire device and suppressing a complicated configuration of the entire device. .

  The present invention has been made in order to solve the above-described problems, and one object of the present invention is to suppress an increase in the size of the entire apparatus and to prevent the overall structure of the apparatus from becoming complicated. An object of the present invention is to provide a stereoscopic video projection apparatus capable of reducing the number of projection units.

  A stereoscopic video projection device according to one aspect of the present invention includes a mirror unit having a reflecting surface arranged in a substantially arc shape or a substantially circular shape, a projection unit that is located inside the mirror unit and projects a stereoscopic projection image. The light beam corresponding to the stereoscopic projection image is reflected by the reflecting surface of the mirror unit arranged in a substantially arc shape or a substantially circular shape by reflecting the light beam corresponding to the stereoscopic projection image projected from the projection unit. Is made incident.

  In the three-dimensional image projector according to one aspect of the present invention, as described above, the mirror unit having the reflecting surface arranged in a substantially arc shape or a substantially circular shape, and the three-dimensional projection image are located inside the mirror unit. Since the projection unit is arranged inside the reflection surface of the mirror unit by providing the projection unit to project, unlike the case where the projection unit is arranged outside, the arrangement space of the projection unit and the mirror unit is increased. Can be suppressed. As a result, the overall size of the apparatus can be suppressed. In addition, since the light emitted radially from the projection unit can be irradiated from the inside of the reflection surface of the mirror unit arranged in a substantially arc shape or a substantially circular shape, unlike the case of irradiating the light from the outside, Light rays can be incident at an angle close to perpendicular to a wider area of the irradiation surface (reflection surface, inner peripheral surface) from the projection unit. As a result, the reflected light can be collected in the vicinity of the center of the reflecting surface of the mirror unit arranged in a substantially arc shape or a substantially circular shape with fewer projection units, so that a stereoscopic projection image can be presented in the vicinity of the center. . In other words, it is possible to irradiate a plurality of reflecting surfaces arranged in a substantially arc shape or a substantially circular shape along the mirror portion with a light beam emitted radially from the projection unit. That is, a plurality of point light sources can be generated by a single projection unit. As a result, the number of projection units can be reduced without rotating the projection units. Therefore, in this stereoscopic image projection device, it is possible to reduce the number of projection units while suppressing an increase in size of the entire device and suppressing a complicated configuration of the entire device.

  In the stereoscopic video projection device according to the above aspect, preferably, the reflection surface of the mirror unit is a surface for diffusing the reflected stereoscopic projection image in the axial direction of the center line of the arc or circle on which the reflection surface is arranged. It has a shape. With this configuration, the reflected stereoscopic projection image can be diffused in the axial direction of the center line of the arc or circle where the reflecting surface is arranged, so that the center line of the arc or circle where the reflecting surface is arranged An observer positioned in the axial direction can easily view the stereoscopic projection image.

  In the three-dimensional image projector according to the above aspect, the reflection surface of the mirror unit is preferably arranged in an inclined state with respect to a plane perpendicular to the light beam emitted from the projection unit. According to this configuration, since the light rays are reflected in the direction away from the projection unit, a stereoscopic projection image can be presented at a position different from the projection unit that does not overlap the projection unit. Can be improved.

  In the three-dimensional image projector according to the above aspect, the projection unit is preferably arranged at the center of an arc or a circle forming the reflection surface of the mirror unit. If comprised in this way, since a projection part is arrange | positioned equidistantly from each point in the circumferential direction on the reflective surface of a mirror part, a light ray can be radiate | emitted equally toward a wider area | region of a reflective surface.

  In the stereoscopic image projection apparatus according to the above aspect, preferably, the mirror portion is a convex lens-shaped convex portion in which a cross section in a direction perpendicular to the axial direction of the center line of an arc or a circle on which the reflecting surface is disposed protrudes toward the projection portion side. Has a part. With this configuration, the angle at which the light rays are diffused by the convex portion is enlarged in the direction orthogonal to the axial direction of the center line of the arc or circle where the reflecting surface is arranged, so that even at a position close to the observer The viewer can visually recognize the stereoscopic projection image.

  In the stereoscopic image projection device according to the above aspect, preferably, the reflection surface of the mirror unit is formed by a plurality of reflection members having a trapezoidal reflection surface extending in the height direction, and the reflection surfaces of the plurality of reflection members are circumferential. By being arranged so as to be adjacent to each other in the direction, they are arranged in a substantially arc shape or a substantially circular shape. If comprised in this way, the several reflective member which has a trapezoid-shaped reflective surface can be arranged so that it may mutually adjoin, and a mortar-shaped (conical trapezoidal) reflective surface can be formed easily.

  In the stereoscopic image projection apparatus according to the above aspect, preferably, the reflection surface of the mirror unit is arranged in a substantially circular shape, and a plurality of projection units are provided, and each of the projection regions of the plurality of projection units is provided. Based on the size, the region of the reflective surface arranged in a substantially circular shape is divided into a plurality of different regions continuous in the circumferential direction, and a plurality of projection units are provided for each of the plurality of different regions continuous in the circumferential direction. Each is used to project the same stereoscopic projection image. With this configuration, the three-dimensional projection image can be projected over the entire area in the circumferential direction of the substantially circular reflecting surface by the plurality of projection units, so that the observer can view the stereoscopic projection image at any position in the circumferential direction. Can be visually recognized.

  In the three-dimensional image projector according to the above aspect, the projection unit preferably includes a projector. If comprised in this way, a three-dimensional projection image can be easily projected with a projector.

  According to the present invention, as described above, it is possible to reduce the number of projection units while suppressing an increase in the size of the entire apparatus and suppressing a complicated configuration of the entire apparatus.

1 is a schematic perspective view showing an overall configuration of a stereoscopic video projector according to a first embodiment of the present invention. It is the top view which showed the installation state of the three-dimensional-image projector by 1st Embodiment of this invention. FIG. 3 is a cross-sectional view taken along line 300-300 in FIG. 2. FIG. 4 is a cross-sectional view taken along line 400-400 in FIG. 1. It is sectional drawing along the 500-500 line | wire of FIG. It is a schematic diagram for demonstrating the projection principle of the stereoscopic video projector by 1st Embodiment of this invention. It is a schematic diagram for demonstrating the reflection principle of the three-dimensional-image projector by 1st Embodiment of this invention. It is a schematic diagram for demonstrating the principle which makes an observer visually recognize a distant point with the three-dimensional-image projector by 1st Embodiment of this invention. It is a schematic diagram for demonstrating the principle of making the point close | similar to an observer visually recognized by the three-dimensional-image projector by 1st Embodiment of this invention. It is the schematic diagram which showed the comparative example of the three-dimensional image projector by 1st Embodiment of this invention. It is the perspective view which showed the structure of the whole three-dimensional image projector by 2nd Embodiment of this invention. It is the top view which showed the installation state of the stereo image projector by 2nd Embodiment of this invention. It is sectional drawing along the 600-600 line of FIG. It is the elements on larger scale which showed the three-dimensional image projector and supporting member of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
With reference to FIGS. 1-9, the structure of the three-dimensional-image projector 100 by 1st Embodiment of this invention is demonstrated.

  As shown in FIG. 1, the stereoscopic image projection device 100 according to the first embodiment reflects one scanning projector 1 that projects a stereoscopic projection image 11 by light rays and the light rays emitted from the scanning projector 1. Thus, an arcuate mirror unit 2 for allowing a light beam corresponding to the stereoscopic projection image 11 to enter the eye of the observer 12 is provided. The scanning projector 1 is an example of the “projection unit” in the present invention.

  As shown in FIGS. 2 and 3, the scanning projector 1 and the mirror unit 2 include a mortar-shaped support member 4 (conical truncated cone shape, that is, a circular shape in plan view and a trapezoidal shape in side view) installed on the table 3. It is configured to be installed inside. Specifically, the support member 4 includes a circular bottom portion 42 having a hole portion 41 formed in the center, and a side portion 43 that extends upward from the end portion of the bottom portion 42. The scanning projector 1 is installed in the hole 41 of the bottom portion 42 of the support member 4, and the mirror unit 2 is installed so as to lean against the inner side surface of the circular side portion 43. The table 3 includes a circular top plate 31 and a plurality of leg portions 32 that support the top plate 31. At the center of the top plate 31, a truncated cone-shaped through hole 33 whose opening diameter decreases from the upper surface side toward the lower surface side is provided in the thickness direction, and the support member 4 is placed in the through hole 33. It is installed by being fitted from above.

  As described above, the stereoscopic image projection device 100 is installed in the support member 4 installed on the table 3 so that the observer 12 around the table 3 can visually recognize the stereoscopic projection image 11. It is configured. The principle of visually recognizing the stereoscopic projection image 11 will be described later.

  The stereoscopic video projector 100 is configured such that the scanning projector 1 is used as a device that projects the stereoscopic projection image 11. In order to irradiate the mirror unit 2 with a two-dimensional image, the scanning projector 1 is configured to scan the light beam in the horizontal direction and the vertical direction and modulate the intensity of the light beam and output it as a predetermined image. ing. As a result, the scanning projector 1 can project a two-dimensional image onto the opposite irradiation target surface.

  The mirror portion 2 is formed in a sector shape corresponding to a part of a mortar shape (conical shape, that is, a circular shape in plan view and a trapezoidal shape in side view). That is, the end in the Z1 direction (upward) is formed in a large-diameter arc shape, the end in the Z2 direction (downward) is formed in a small-diameter arc, and a large-diameter arc and a small-diameter arc It is formed in the sector shape which tied the edge part of this by the straight line. The scanning projector 1 is disposed at the center of a circle (one-dot chain line circle shown in FIG. 1) where the fan-shaped small-diameter arc-shaped end is located. Note that the arrangement in this case includes a case where a portion (light source) that emits the light beam of the scanning projector 1 is arranged at the center of the one-dot chain circle shown in FIG. Further, the size of the mirror part 2 and the inclination angle with respect to the bottom part 42 of the support member 4 are set according to the required size and brightness of the stereoscopic projection image 11.

  The mirror unit 2 has a reflecting surface 21 on the inner surface side. The reflecting surface 21 is arranged in a state inclined with respect to a surface perpendicular to the light beam emitted from the scanning projector 1. As a result, the mirror unit 2 is configured to reflect the light beam irradiated from the scanning projector 1 by the reflecting surface 21 in a direction away from the scanning projector 1. That is, the reflecting surface 21 is inclined so that the reflected light beam does not return directly to the scanning line projector 1 side. As a result, the stereoscopic projection image 11 is presented at a position above the scanning projector 1 that is different from the arrangement position of the scanning projector 1.

  The reflecting surface 21 of the mirror part 2 is formed by a plurality of reflecting members 22 having a trapezoidal reflecting surface 21 extending in the height direction. The reflecting surfaces 21 of the plurality of reflecting members 22 are arranged so as to be adjacent to each other in the circumferential direction (A direction shown in FIG. 1), thereby being arranged in an arc shape.

  Here, in the first embodiment, the reflecting surface 21 of the mirror unit 2 is parallel to the XY plane (horizontal plane) shown in FIG. 1 so that the observer 12 can visually recognize the stereoscopic projection image 11 in a wide range. In addition, the light beam can be diffused in the Z direction (upward direction). Hereinafter, a configuration in which the reflecting surface 21 diffuses light will be described.

  First, a configuration in which the reflecting surface 21 diffuses light rays in a direction parallel to the XY plane (horizontal plane) shown in FIG. 1 will be described. As shown in FIG. 4, the mirror unit 2 is a direction orthogonal to the axial direction (Z direction (upward direction) shown in FIG. 1) of the center line C (broken line shown in FIG. 1) of the arc in which the reflecting surface 21 is arranged. A cross section (a plane parallel to the XY plane (horizontal cross section) shown in FIG. 1) has a convex lens-shaped convex portion 23 projecting toward the scanning projector 1 side. In addition, the mirror part 2 has shown only the cross-sectional shape in FIG. Further, this convex portion 23 is formed one by one for one reflecting member 22 and is continuously formed in the entire circumferential direction of the mirror portion 2 (curved arrow direction shown in FIG. 1). By forming such a convex portion 23 on the reflecting surface 21 of the mirror portion 2, the light beam having an angle α1 emitted from the scanning projector 1 is reflected by the convex portion 23, and has a wider angle of view (horizontal) than the angle α1. Angle) Diffused at α2. That is, the angle of view is expanded by diffusing light rays. Note that the principle of presenting the stereoscopic projection image 11 with the enlarged angle of view will be described later.

  Next, a configuration in which the reflecting surface 21 diffuses light rays in the Z direction (upward direction) shown in FIG. 1 will be described. As shown in FIG. 5, the reflecting surface 21 of the mirror unit 2 applies the reflected stereoscopic projection image 11 to the axial direction of the center line of the arc in which the reflecting surface 21 is arranged (Z direction (upward direction) shown in FIG. 1). ) Has a surface shape for diffusion. That is, a convex lens-shaped convex portion 24 formed continuously in the circumferential direction of the mirror portion 2 is formed on the reflecting surface 21 continuously in the tilt direction (obliquely upward direction) of the mirror portion 2 in FIG. Yes. By forming such a convex part 24 on the reflecting surface 21 of the mirror part 2, each light beam emitted from the scanning projector 1 is reflected by the convex part 24, and in the Z direction (upward direction) shown in FIG. 5. It is diffused at an angle (vertical angle) β so as to spread. That is, the viewing angle is expanded by diffusing light rays. The convex portion 24 is an example of the “surface shape” in the present invention.

  The mirror unit 2 is made of a material that reflects the light beam emitted from the scanning projector 1 without transmitting it. For example, as the material of the mirror part 2, a synthetic resin material, a member obtained by evaporating aluminum or silver on glass, a member obtained by finishing a metal into a mirror surface, or the like is used.

  The mirror unit 2 is configured by bonding a plurality of reflecting members 22 each having a trapezoidal reflecting surface 21 so that the reflecting surfaces 21 of the reflecting members 22 are adjacent to each other in the circumferential direction.

  Here, with reference to FIG. 6, the principle of generation of binocular parallax in the stereoscopic video projector 100 will be described.

  As shown in FIG. 6, when an observer 12 having a right eye E1 (12) and a left eye E2 (12) sees a point P1 on the reflecting surface 21 of the mirror unit 2, the right eye E1 has a scanning type. The right-eye light beam L1 emitted from the projector 1 is reflected by the reflecting surface 21 and is incident, and the right-eye light beam L1 is not incident on the left eye E2. Further, when the observer 12 sees the point P2 on the reflection surface 21 of the mirror unit 2, the left-eye light beam L2 emitted from the scanning projector 1 is reflected by the reflection surface 21 and enters the left eye E2. The left eye light beam L2 does not enter the right eye E1. Here, the right-eye light beam L1 and the left-eye light beam L2 are the same color (in this case, red).

  Both the right-eye light beam L1 and the left-eye light beam L2 emitted from the scanning projector 1 pass through a point P3 on the stereoscopic projection image 11. That is, the right eye light beam L1 and the left eye light beam L2 intersect at a point P3, thereby forming a point P3 which is a point light source on the stereoscopic projection image 11. In this case, the direction in which the right eye E1 views the point P3 is different from the direction in which the left eye E2 views the point P3. That is, a convergence angle θ is generated between the line-of-sight direction of the right eye E1 and the line-of-sight direction of the left eye E2. Thereby, the observer 12 can visually recognize the red point light source at the position of the point P3 in the space in order to obtain an index for grasping the depth to the point P3. Further, a plurality of point light sources such as the point P3 are gathered to form the stereoscopic projection image 11 in the space.

  Next, with reference to FIG. 7, the reflection of the light beam on the reflection surface 21 of the mirror unit 2 will be described. In order to facilitate understanding, the reflecting surface 21 will be described as having a planar shape. That is, it is assumed that the incident angle of light and the reflection angle are equal. The light beam emitted from the scanning projector 1 is configured to enter the reflecting members 22a, 22b and 22c as indicated by solid arrows and to be reflected as indicated by broken arrows. In addition, description of the reflected light from reflection member 22b and 22c is abbreviate | omitted on drawing. Further, by increasing the number of reflection members and the angle of view emitted from the scanning projector 1, it becomes possible to obtain a large number of light rays that are incident on both eyes of the observer 12 described in FIG. The stereoscopic projection image 11 can be formed on the space.

  Next, with reference to FIG. 8 and FIG. 9, the principle of allowing the observer 12 to visually recognize a point light source (point N1) far from the positions of both eyes E1 and E2 and a point light source near (point N2) will be described. To do. 8 and FIG. 9 indicates a light beam reflection position on the reflection surface 21. Here, it is assumed that the reflecting surface 21 is formed in a circular shape.

  First, with reference to FIG. 8, the principle of allowing the observer 12 to visually recognize a point light source (point N1) far away will be described.

  The right-eye light beam L3 emitted from the point O is reflected by the point Q1 on the reflecting surface 21 and is incident on the right eye E1 (12). The left-eye light beam L4 emitted from the point O is reflected by the point Q2 on the reflecting surface 21 and is incident on the left eye E2 (12). A point N1 where the right-eye light beam L3 and the left-eye light beam L4 intersect is formed so as to be visually recognized by the observer 12. The angles between the incident light and the reflected light of the right eye light beam L3 and the left eye light beam L4 are γ1 and γ2.

  Next, with reference to FIG. 9, the principle of allowing the observer 12 to visually recognize a nearby point light source (point N2) will be described.

  The right-eye light beam L5 emitted from the point O is reflected by the point Q3 on the reflecting surface 21 and is incident on the right eye E1 (12). The left-eye light beam L6 emitted from the point O is reflected by the point Q4 on the reflecting surface 21 and is incident on the left eye E2 (12). A point N2 where the right-eye light beam L5 and the left-eye light beam L6 intersect is formed so as to be visually recognized by the observer 12. The angles between the incident light and the reflected light of the right eye light beam L5 and the left eye light beam L6 are δ1 and δ2.

  Here, as shown in FIGS. 8 and 9, the angles δ1 and δ2 are formed larger than the angles γ1 and γ2. That is, when the near point light source (point N2) is visually recognized by the observer 12, the angle formed by the incident light and the reflected light on the reflecting surface 21 is larger than when the far point light source is visually recognized. Become. Here, if the reflecting surface 21 has a flat shape, the reflected light beam passes through the vicinity of the point O. In the case of such a flat reflecting surface 21, a point N1 that is visually recognized by the observer 12 is formed by the right-eye light beam L3 and the left-eye light beam L4 passing through the vicinity of the point O as shown in FIG. Is possible. However, it is impossible to form the point N2 visually recognized by the observer 12 by the right eye light beam L5 and the left eye light beam L6 that do not pass near the point O as shown in FIG. Therefore, in the first embodiment, as described above with reference to FIG. 4, by providing the convex portion 23 on the reflecting surface 21, the light beam is reflected at a wide angle in a direction parallel to the XY plane (horizontal plane). It is configured as possible. As a result, a point light source located near the observer 12 such as the point N2 can be visually recognized.

  In the first embodiment, as described above, the mirror unit 2 having the reflecting surface 21 arranged in an arc shape, and the scanning projector 1 that is located inside the mirror unit 2 and projects the stereoscopic projection image 11 are provided. Provide. Thereby, since the scanning projector 1 is disposed inside the reflection surface 21 of the mirror unit 2, the arrangement space of the scanning projector 1 and the mirror unit 2 is increased, unlike the case where the scanning projector 1 is disposed outside. Can be suppressed. As a result, the overall size of the apparatus can be suppressed. Further, since the light emitted radially from the scanning projector 1 can be irradiated from the inside of the reflecting surface 21 of the mirror unit 2, unlike the case of irradiating the light from the outside, the reflecting surface from one scanning projector 1 can be used. A light beam can be incident on a wider area of 21 (inner peripheral surface) at an angle close to vertical. As a result, the reflected light can be collected near the center of the reflecting surface 21 of the mirror portion 2 arranged in a substantially arc shape or a substantially circular shape by fewer scanning projectors 1, so that the three-dimensional projection is performed near the center of the mirror portion 2. An image 11 can be presented. In other words, it is possible to irradiate the plurality of reflecting surfaces 21 arranged in an arc along the mirror unit 2 with the light beams emitted radially from the scanning projector 1. That is, a plurality of point light sources can be generated by one projector. As a result, the number of scanning projectors 1 can be reduced without rotating the scanning projector 1. Therefore, in this stereoscopic image projection device 100, it is possible to reduce the number of scanning projectors 1 while suppressing an increase in size of the entire device and suppressing a complicated configuration of the entire device.

  In the first embodiment, the surface shape of the reflecting surface 21 of the mirror unit 2 is such that the reflected stereoscopic projection image 11 diffuses in the axial direction of the center line of the arc on which the reflecting surface 21 is arranged. Thereby, the reflected stereoscopic projection image 11 can be diffused in the axial direction of the center line of the arc in which the reflecting surface 21 is arranged, and thus is positioned in the axial direction of the center line of the arc in which the reflecting surface 21 is arranged. The observer 12 can easily visually recognize the stereoscopic projection image 11.

  Further, in the first embodiment, the reflecting surface 21 of the mirror unit 2 is arranged in an inclined state with respect to a plane perpendicular to the light beam emitted from the scanning projector 1. As a result, the three-dimensional projection image 11 can be presented at a position different from the scanning projector 1 that does not overlap the scanning projector 1 by reflecting the light rays in the direction away from the scanning projector 1. The visibility of the person 12 can be improved.

  In the first embodiment, the scanning projector 1 is arranged at the center of an arc that forms the reflection surface 21 of the mirror unit 2. Thereby, since the scanning projector 1 is arranged at equal distances from the respective points in the circumferential direction on the reflection surface 21 of the mirror unit 2, it is possible to emit light evenly toward a wider area of the reflection surface 21. .

  In the first embodiment, the convex portion 24 having a convex lens shape protruding toward the scanning projector 1 is provided in a cross section in a direction orthogonal to the axial direction of the center line of the arc where the reflecting surface 21 of the mirror portion 2 is disposed. Thereby, in the direction orthogonal to the axial direction of the center line of the arc or circle where the reflecting surface 21 is arranged, the angle at which the light beam is diffused from the convex portion 24 is enlarged, so even at a position close to the observer 12, The stereoscopic projection image 11 can be visually recognized by the observer 12.

  Moreover, in 1st Embodiment, the reflective surface 21 of the mirror part 2 is formed with the several reflective member 22 which has the trapezoid-shaped reflective surface 21 extended in a height direction, and the reflective surface 21 of the several reflective member 22 is formed. By arranging so as to be adjacent to each other in the circumferential direction, they are arranged in a substantially arc shape or a substantially circular shape. Thereby, the plurality of reflecting members 22 having the trapezoidal reflecting surface 21 can be arranged so as to be adjacent to each other, and the mortar-shaped (conical trapezoidal) reflecting surface 21 can be easily formed.

  In the first embodiment, the projection unit is configured by the scanning projector 1. Thereby, the stereoscopic projection image 11 can be easily projected by the scanning projector 1.

  Next, with reference to FIG. 7 and FIG. 10, a comparative example with the first embodiment will be described to explain that the number of the scanning projectors 1 can be reduced in the first embodiment.

  In the first embodiment, a reflected light beam (a light beam that is incident on the reflection surface 21 at an angle close to the vertical and can present the stereoscopic projection image 11 near the center of the mirror unit 2) as shown in FIG. In order to obtain it from the scanning projector 1 arranged outside 2, a configuration such as the following comparative example is required. In the comparative example, the mirror unit 2 in the first embodiment is replaced with a light beam control member 91 that transmits light without reflecting light.

  As shown in FIG. 10, the comparative example includes three scanning projectors 1 arranged at points S1, S2, and S3 outside the light beam control member 91. The light beam control member 91 is composed of transmission members 92a to 92c. Although not shown, the light beam is transmitted through the transmissive members 92b and 92c. In the comparative example, the reflecting members 22a to 22c in the first embodiment are replaced with transmitting members 92a to 92c that transmit light without reflecting light rays.

  Thus, the scanning projector 1 arranged at the center of the mirror unit 2 can be replaced with a plurality of scanning projectors 1 arranged outside the light beam control member 91 according to the number of transmission members 92. Therefore, in the first embodiment, the number of scanning projectors can be reduced as compared with the comparative example.

(Second Embodiment)
Next, with reference to FIGS. 11-13, the structure of the three-dimensional-image projector 200 by 2nd Embodiment of this invention is demonstrated.

  In the second embodiment, unlike the first embodiment in which one scanning projector 1 is arranged at the center of an arc that forms the reflection surface 21 of the mirror unit 2, a circle that forms the reflection surface 21 of the mirror unit 202. A three-dimensional image projector 200 in which four scanning projectors 1a to 1d are arranged at the center will be described. The scanning projectors 1a to 1d are examples of the “projection unit” in the present invention.

  As shown in FIG. 11, the stereoscopic video projector 200 according to the second embodiment includes a reflective surface 21 arranged in a circle and four scanning projectors 1 a to 1 d. In addition, the stereoscopic image projection device 200 equally distributes the region of the reflective surface 21 arranged in a circle to 90 ° in the circumferential direction based on the size of the projection region of each of the four scanning projectors 1a to 1d. Are divided into four continuous regions with a phase difference of 4 mm, and the same three-dimensional projection image 11 is projected using each of the four scanning projectors 1a to 1d for each of four consecutive regions in the circumferential direction. It is configured as follows. The four scanning projectors 1a to 1d are arranged so as to emit light rays in the circumferential direction with a phase difference of 90 °.

  The mirror unit 202 has a mortar shape (conical shape, that is, a circular shape in plan view and a trapezoidal shape in side view). The scanning projectors 1 a to 1 d are installed in a hole 41 formed at the center of the bottom 42 of the mortar-shaped support member 4. Further, the mirror unit 202 is installed so as to contact the inner surface of the side part 43 of the mirror unit 202. The specific number of the reflecting members 22 of the mirror unit 202 is preferably about 2 or more and about 100 or less for one projector 2. The number of reflection members 22 is set in consideration of the balance between the resolution of the mirror unit 202 and the resolutions of the scanning projectors 1a to 1d.

  Then, as shown in FIGS. 12 and 13, the stereoscopic image projection device 200 is installed on the table 3, so that the observer 212 positioned in the circumferential direction of the table 3 faces each of the observers 212. The same three-dimensional projection image 11 formed by the projectors 1a to 1d can be viewed above the scanning projectors 1a to 1d.

  In addition, the other structure of 2nd Embodiment is the same as that of the said 1st Embodiment.

  In the second embodiment, as described above, the mirror unit 202 having the reflective surface 21 arranged in a circle and the scanning projectors 1a to 1d positioned inside the reflective surface 21 arranged in a circle is provided. . As a result, in the same manner as in the first embodiment, in the stereoscopic image projection apparatus 200, the overall size of the apparatus is suppressed, and the overall configuration of the apparatus is suppressed, while the configuration of the entire apparatus is suppressed. The number of 1d can be reduced.

  In the second embodiment, as described above, the reflection surface 21 of the mirror unit 202 is arranged in a circular shape, and four scanning projectors 1a to 1d are provided, and the projection areas of the four scanning projectors 1a to 1d are provided. The area of the reflection surface 21 arranged in a circle is divided into four different areas continuous in the circumferential direction, and four scans are made for each of the four different areas continuous in the circumferential direction. The same three-dimensional projection image 11 is projected using each of the type projectors 1a to 1d. Thereby, since the three-dimensional projection image 11 can be projected over the whole area of the circular reflecting surface 21 in the circumferential direction by the four scanning projectors 1a to 1d, the observer 212 is able to project at any position in the circumferential direction. The stereoscopic projection image 11 can be visually recognized.

  The remaining effects of the second embodiment are similar to those of the aforementioned first embodiment.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes all modifications within the meaning and scope equivalent to the scope of claims for patent.

  For example, in the first and second embodiments, as an example of the mirror portion of the present invention, a sector shape corresponding to a part of a mortar-shaped mortar shape (conical shape, that is, a circular shape in plan view and a side-view shape). Although the example formed in a shape was shown, this invention is not limited to this. In the present invention, a cylindrical shape or a flat plate shape corresponding to a part of the cylindrical shape may be used.

  Moreover, in the said 1st and 2nd embodiment, although the structure installed in a table was shown as an example of the stereo image projector of this invention, this invention is not limited to this. In this invention, the structure installed other than a table, such as attaching to a wall surface, may be sufficient.

  Moreover, in the said 1st and 2nd embodiment, although the structure which arrange | positions a projection part in the center of the circular arc or circle which forms the reflective surface of a mirror part was shown, this invention is not limited to this. In the present invention, the position may be shifted from the center of the substantially arc shape or the substantially circular shape as long as it is inside the reflecting surface arranged in a substantially arc shape or a substantially circular shape.

  Moreover, although the example which provides the convex part of the convex lens shape which continued in the upper direction in the mirror part of this invention was shown in the said 1st and 2nd embodiment, this invention is not limited to this. In the present invention, it may have a diffraction grating surface shape.

  In the first and second embodiments, as an example of the mirror portion of the present invention, a cross section in a direction orthogonal to the axial direction of the center line of the arc on which the reflecting surface is arranged is continuous in the circumferential direction protruding to the projector side. Although the structure which has the convex part of the convex lens shape to show was shown, this invention is not limited to this. In the present invention, if the light beam can be diffused in a direction perpendicular to the axial direction of the center line of the arc or circle where the reflecting surface is arranged, the mirror portion has a shape other than the convex lens shape, such as a concave lens shape. You may have.

  In the first and second embodiments, the scanning projector and the mirror unit are installed on the mortar-shaped support member so that the positional relationship between them is determined. However, the present invention is not limited to this. Absent. In the present invention, a bar-shaped connecting member may be provided between the scanning projector and the mirror unit to integrally form both.

  In the first and second embodiments, the scanning projector is shown as an example of the projection unit of the present invention, but the present invention is not limited to this. In the present invention, a projector other than a scanning projector such as an LCD (Liquid Crystal Display) projector, an LCOS (Liquid CrystalL On Silicon) projector, and a DLP (Digital Light Processing) projector may be used. In addition, a projection unit other than a projector, such as a plurality of laser pointers, may be used as long as a stereoscopic projection image can be projected.

  Moreover, although the example which arrange | positions four projectors was shown in the said 2nd Embodiment, this invention is not limited to this. In the present invention, if the stereoscopic video projection device can project the same stereoscopic projection image using each of a plurality of projection units for each of a plurality of different reflecting surface regions that are continuous in the circumferential direction, the projector is A plurality other than four may be used. Further, a plurality of scanning projectors may be arranged with respect to the arc-shaped mirror portion.

  In the first and second embodiments, the mirror unit is configured by bonding a plurality of reflecting members having trapezoidal reflecting surfaces so that the reflecting surfaces of the reflecting members are adjacent to each other in the circumferential direction. However, the present invention is not limited to this. In the present invention, the mirror portion may be fabricated integrally. For example, when a synthetic resin material is used, the mirror part can be produced by injection molding. Moreover, when using a metal material, a mirror part can be produced by cutting and polishing.

1, 1a to 1d Scanning projector (projection unit)
2, 202 Mirror part 11 Stereoscopic projection image 12, 212 Observer 21 Reflecting surface 22 Reflecting member 23 Convex part 24 Convex part (surface shape)
100, 200 stereoscopic image projection apparatus

Claims (8)

A mirror portion having a reflecting surface arranged in a substantially arc shape or a substantially circular shape;
A projection unit that is located inside the mirror unit and projects a stereoscopic projection image;
The light beam corresponding to the stereoscopic projection image projected from the projection unit is reflected by the reflecting surface of the mirror unit arranged in a substantially arc shape or a substantially circular shape to reflect the stereoscopic projection image. A stereoscopic image projection device configured to make the light incident.   The reflective surface of the mirror section has a surface shape for diffusing the reflected stereoscopic projection image in an axial direction of a center line of an arc or a circle in which the reflective surface is disposed. The three-dimensional image projector described in 1.   The stereoscopic image projection apparatus according to claim 1, wherein the reflection surface of the mirror unit is disposed in a state of being inclined with respect to a surface perpendicular to the light beam emitted from the projection unit.   The stereoscopic image projection device according to claim 1, wherein the projection unit is disposed at a center of an arc or a circle that forms the reflection surface of the mirror unit.   The said mirror part has the convex part of the convex lens shape from which the cross section of the direction orthogonal to the axial direction of the centerline of the circular arc or circle | round | yen where the said reflective surface is arrange | positioned protrudes in the said projection part side. 5. The three-dimensional image projector according to claim 4.   The reflection surface of the mirror part is formed by a plurality of reflection members having a trapezoidal reflection surface extending in the height direction, and the reflection surfaces of the plurality of reflection members are arranged adjacent to each other in the circumferential direction. The three-dimensional image projector of any one of Claims 1-5 arrange | positioned by substantially arc shape or substantially circle shape. The reflection surface of the mirror part is arranged in a substantially circular shape,
A plurality of the projection units are provided,
Based on the size of the projection area of each of the plurality of projection units, the area of the reflecting surface arranged in a substantially circular shape is divided into a plurality of different areas that are continuous in the circumferential direction, and continuous in the circumferential direction The stereoscopic video projection according to claim 1, wherein the same stereoscopic projection image is projected using each of the plurality of projection units for each of a plurality of different regions. apparatus.   The three-dimensional image projector according to claim 1, wherein the projection unit includes a projector.

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