JP2012137766A - Three-dimensional image display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a three-dimensional image display device with a compact structure that allows a two-dimensional image displayed on a screen of a two-dimensional image display device to be viewed as a three-dimensional image.SOLUTION: The three-dimensional image display device that three-dimensionally displays an image displayed on a screen of an image display device by reflecting the image using a plurality of mirrors, has a body case in which the image display device is mounted, and a mirror device provided with a mirror case which is formed integrally with the body case and in which the plurality of the mirrors are arranged at predetermined intervals and at a predetermined angle in parallel in the depth direction to be fixed. The mirror case is pivotally supported at a predetermined portion of the body case so as to be rotatable around a shaft. When a three-dimensional image is displayed, the mirror case is rotated toward the body case side and around the shaft to position the plurality of the mirrors so as to be inclined at a predetermined angle to the screen of the image display device and toward a viewer side, thereby reflecting and displaying the image displayed on the screen of the image display device.

Description

  The present invention relates to a three-dimensional video display device, and more particularly to a three-dimensional video display device that uses a two-dimensional video display device and a plurality of mirrors to display a three-dimensional video image that can be viewed without wearing special glasses.

  A conventional 3D image display apparatus includes a method in which a plurality of half mirrors are arranged in a 2D image display apparatus. For example, in the display devices disclosed in Patent Literature 1 and Patent Literature 2, virtual images generated by a half mirror from video displayed on a two-dimensional video display device are displayed on a plurality of display surfaces having different depth positions as viewed from the viewer. By displaying simultaneously, a three-dimensional image is generated. In Patent Document 1, the height of the half mirror is the same, and the visible range is narrow. However, in Patent Document 2, the height of the half-mee is increased as it is closer to the viewer, so that a wedge-shaped image area can be generated and visually recognized. The range is expanding.

  In this way, a 3D image in which a plurality of half mirrors are arranged on a 2D image display device and a planar virtual image is viewed in the depth direction is a 3D image like a book split used in a play stage. Does not require special glasses. In terms of the physiological factors of stereoscopic vision, all the factors of vergence, focus adjustment, binocular parallax, and motion parallax are used, which is exactly the same as when viewing normal stereoscopic images. There is no eye fatigue like the 3D image device seen only by the factor.

  In this specification, “full mirror” refers to a mirror having a reflectance of 100% to 80%. The “mirror” includes a half mirror and a full mirror.

JP 2006-135378 A JP 2008-020564 A

  The conventional apparatus described in Patent Document 1 and Patent Document 2 uses a low-reflectance material such as a vinyl chloride plate as a half mirror, so the generated three-dimensional image is dark and can only be viewed in a dark place. There was a drawback. Further, since the half mirror is attached to the two-dimensional video display device in a fixed manner, only the screen of the two-dimensional video display device cannot be viewed in a normal manner. There is also a problem that the entire apparatus is bulky and is not suitable for carrying.

  It is an object of the present invention to provide a 3D video display device having a compact structure that allows a 2D video displayed on the screen of the 2D video display device to be viewed as a 3D video.

The 3D video display device according to the present invention is preferably a 3D video display device that displays video displayed on the screen of the video display device using a plurality of mirrors to display the video in a three-dimensional manner. A main body case for mounting a display device, and a mirror device including a mirror case that is formed integrally with the main body case and in which a plurality of mirrors are arranged and fixed in parallel at predetermined intervals and predetermined angles in the depth direction;
The mirror case is pivotally supported on a predetermined part of the main body case so as to be rotatable around an axis,
When displaying a three-dimensional image, the mirror case rotates about the axis toward the main body case, and the plurality of mirrors are inclined at a predetermined angle toward the viewer with respect to the screen of the image display device. It is configured as a three-dimensional video display device that is positioned and reflects and displays the video displayed on the screen of the video display device.

  In a preferred example, the plurality of mirrors are arranged such that the height of the mirrors decreases toward the back, the first and second half mirrors arranged on the side closer to the viewer side, and the first And a three-dimensional image display device including one full mirror disposed behind the second half mirror.

  Preferably, the main body case is a 3D video display device that houses a portable display device having a screen for displaying a 2D video as the 2D video display device.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the 3D video display apparatus of a compact structure which can view 2D video displayed on the screen of a 2D video display apparatus as 3D video.

It is a perspective view which shows the positional relationship of a two-dimensional video display apparatus and a mirror apparatus. It is a side view which shows the positional relationship of a two-dimensional video display apparatus and a mirror apparatus. It is a disassembled perspective view which shows the mirror apparatus and main body case in 1st Embodiment. It is a perspective view of the 3D video display device in a state where the screen of the 2D video display device in the first embodiment can be viewed. It is a figure explaining the mechanism in which a mirror rotates. It is a figure for demonstrating the intensity | strength of the axis | shaft of a mirror. It is a figure which shows the detail of the axis | shaft of a mirror. 1 is a perspective view of a 3D video display device when viewing a 3D video in a first embodiment. FIG. It is sectional drawing of the three-dimensional video display apparatus when appreciating the three-dimensional video in 1st Embodiment. It is a perspective view of a mirror apparatus when the mirror in 1st Embodiment is folded. It is a perspective view of the three-dimensional video display apparatus when the mirror in 1st Embodiment is folded. It is sectional drawing of the three-dimensional video display apparatus when the mirror in 1st Embodiment is folded. It is a side view which shows the mechanism by which a mirror is folded. It is a perspective view which shows incision of the mirror case in 1st Embodiment. It is a perspective view of the main body case in 1st Embodiment. It is sectional drawing of the three-dimensional video display apparatus in 1st Embodiment. It is a disassembled perspective view of the mirror apparatus in 2nd Embodiment. It is a perspective view which shows the three-dimensional video display apparatus in 2nd Embodiment. It is sectional drawing of the three-dimensional video display apparatus in 2nd Embodiment. It is a perspective view of the 3D video display device when viewing 3D video in the second embodiment. It is sectional drawing of the three-dimensional video display apparatus when appreciating the three-dimensional video in 2nd Embodiment.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 and FIG. 2 are a perspective view and a side view showing a positional relationship of elements constituting a 3D video display apparatus according to an embodiment of the present invention. Referring to FIGS. 1 and 2, main components of the 3D video display device are a 2D video display device 70 and a mirror device 80 provided on the 2D video display device 70. The main components of the mirror device 80 are two flat half mirrors 81 and 82 and one flat full mirror 83. 1 and 2, only the half mirrors 81 and 82 and the full mirror 83 are shown in the mirror device 80, and components for fixing the mirror at a predetermined position are not shown. In FIG. 2, half mirrors 81 and 82 and full mirror 83 reflect the images displayed on the screens 71a, 71b and 71c of the two-dimensional image display device 70 to generate virtual images 81a, 82a and 83a.

  As shown in FIG. 2, the half mirrors 81 and 82 and the full mirror 83 are arranged with a predetermined interval and a predetermined angle with respect to the screen 71. The half mirrors 81 and 82 and the full mirror 83 are inclined on the screen 71 at a constant angle, and are arranged so that the surfaces of all the half mirrors 81 and 82 and the full mirror 83 are parallel to each other. The half mirrors 81 and 82 and the full mirror 83 are preferably disposed at an angle of about 45 ° toward the viewer 200.

  The two-dimensional image display device 70 is a liquid crystal display, a plasma display, an LED display, etc. used for a flat-screen TV or a mobile phone. The entire flat-screen TV including the display part, the entire mobile phone, the entire portable game player, touch The entire formula tablet is shown. The mobile phone includes a display with a touch panel.

  As shown in FIG. 2, the viewing area V is wedge-shaped so that the heights of the half mirrors 81 and 82 and the full mirror 83 become lower as they go deeper as viewed from the viewer 200. The height ratio of the front and rear half mirrors 81 and 82 or the full mirror 83 is the same, and the range is from 1: 0.65 to 1: 0.95.

  Further, the height ratio of the front and rear half mirrors 81 and 82 or the full mirror 83 is preferably Ha: Hb = 1: 0.79 and Hb: Hc = 1: 0.79.

  Therefore, with respect to the depth D of the screen 71, the length Da of the video area 71a of the half mirror 81 is 0.41D, the length Db of the video area 71b of the half mirror 82 is 0.33D, and the length of the video area 71c of the full mirror 83 Dc is 0.26D, and the heights Ha, Hb, and Hc of the half mirrors 81 and 82 and the full mirror 83 are 1.4 times that of Da, Db, and Dc, respectively. In FIG. 1, the width Wm of the half mirrors 81 and 82 and the full mirror 83 is slightly longer than the width W of the screen 71.

  The virtual image 81a in the video area 71a under the half mirror 81, the virtual image 82a in the video area 71b under the half mirror 82, and the virtual image 83a in the video area 71c under the full mirror 83 overlap the depth position in the gaze direction 201 of the viewer 200. It looks like a 3D image.

  In this embodiment, a brighter three-dimensional image can be obtained by using a half mirror having a high reflectance that has not been used in the past. Specifically, the visible light transmittance of the foremost half mirror 81 as viewed from the viewer 200: The reflectance is in the range of 67:33 to 60:40, and the visible light transmittance of the next half mirror 82: reflectance. Is set to 50:50 to 55:45, and the visible light reflectivity of the innermost full mirror 83 is set to 100% to 80%, so that all the virtual images 81a, 81b, 81c have almost the same brightness from the viewers. It can be seen and an image with sufficient brightness can be obtained even when the lighting is turned on indoors. As a result, it is possible to view a 3D image with brightness with indoor lighting.

  As a preferable combination of the reflectance and transmittance of each mirror constituting the mirror device, the half mirror 81 may be 67:33, the half mirror 82 may be 50:50, and the full mirror 83 may have a reflectance of 100%. This assumes a case where the reflection performance of the full mirror 83 is high.

  In another preferred combination, the half mirror 81 is 69:31, the half mirror 82 is 55:45, and the full mirror 83 has a reflectance of 80%. This assumes that the reflection performance of the full mirror 83 is slightly inferior.

  In another preferred combination, the half mirror 81 is 60:40, the half mirror 82 is 50:50, and the full mirror 83 has a reflectance of 80%. Although the above two combinations are values based on theoretical calculations, this value is an experimentally obtained value.

  At this time, in order to reduce the ghost, the reflective surfaces of the half mirrors 81 and 82 and the full mirror 83 are arranged so that the viewer 200 faces the viewer.

Next, a specific embodiment for arranging and fixing the half mirrors 81 and 82, the full mirror 83, and the two-dimensional image display device 70 shown in FIGS. 1 and 2 at predetermined positions will be described. The basic proportional dimensions, transmittance and reflectance of the half mirrors 81 and 82 and the full mirror 83 are the same.
(1) First Embodiment FIG. 3 is an exploded perspective view showing the overall configuration of a 3D video display apparatus according to a first embodiment of the present invention. However, the two-dimensional image display device 70 is not included in this figure. Referring to FIG. 3, the mirror device 80 includes a mirror case 2, half mirrors 11 and 12, and a full mirror 13. The mirror device 80 can be combined with the main body case 3.

  The main body case 3 has a shape of a container into which the 2D image device 70 can enter without a gap, and a pair of bearing holes 3k for uniting with the mirror case 2 and a pair of valley-shaped units for stabilizing the position of the mirror case 2 A protrusion 3i is provided.

  The mirror case 2 fixes the half mirrors 11 and 12 and the full mirror 13 at predetermined positions, and has a function of combining with the main body case 3. The mirror case 2 includes a pair of substantially fan-shaped holes (shaft holes) 2a, 2b, 2c and a pair of stoppers 2d, 2f, 2h for fixing the half mirrors 11, 12 and the full mirror 13, and a pair of claws 2e, 2g and 2i are provided on both sides, and a pair of pivots 2k for merging with the body case and a pair of mountain-shaped protrusions 2j for stabilizing the positions of the mirror case 2 and the body case 3 are provided. . The material of the main body case 3 and the mirror case 2 is preferably a synthetic resin having elasticity such as polypropylene, polycarbonate, ABS resin, styrene resin, and hard vinyl chloride.

  The half mirrors 11 and 12 and the full mirror 13 have a substantially rectangular shape with rectangular shafts 11a, 12a and 13a on both sides of one side so that they can be inserted into the substantially fan-shaped holes (shaft holes) 2a, 2b and 2c in the mirror case 2. Presents. The thicknesses of the half mirrors 11 and 12 and the full mirror 13 are preferably 1 mm to 2 mm when the diagonal length of the screen 71 is about 3.5 inches.

  When the screen 71 is about 10 inches, 2 mm to 3 mm is preferable. When the screen 71 is about 30 inches, 3 mm to 5 mm is preferable. The half mirrors 11 and 12 and the full mirror 13 are preferably made of glass, acrylic, hard vinyl chloride, or polycarbonate. The color is preferably as transparent as possible. The visible light transmittance and reflectance of the half mirrors 11 and 12 are as described above, and the half mirrors 11 and 12 are preferably half mirrors with a dielectric multilayer coating in order to suppress the visible light absorption. The full mirror 13 is preferably a dielectric multilayer coating, but may be an Inconel coating with a metal vapor deposition film.

  FIG. 4 shows a state where the 2D video display device 70 is accommodated in the main body case 3 and the mirror device 80 and the main body case 3 are combined. The mirror device 80 is assembled by inserting the shafts of the half mirrors 11 and 12 and the full mirror 13 into the substantially fan-shaped holes 2a, 2b and 2c of the mirror case 2, respectively.

  Further, the mirror device 80 and the main body case 3 can be combined by inserting the pivot 2k of the mirror case 2 into the bearing hole 3k of the main body case 3 (see FIG. 12D). In the state of FIG. 4, since the entire screen 71 is visible, the screen 71 can be viewed normally. However, since the half mirrors 11 and 12 and the full mirror 13 are not in a predetermined position with respect to the screen 71, 3D video can be viewed. I can't.

  FIG. 5 is a view showing a state in which the half mirror 11 rotates around the axis. FIG. 5A is a perspective view of the half mirror 11, and FIG. 5B is a side view. Referring to FIG. 5, the axis 11a of the half mirror 11 is a rectangle protruding outward, the length is d, and the width is w. The length d is equal to the diameter of the substantially fan-shaped bearing hole 2a. The half mirror 11 having the rectangular shafts 11a on both sides can be rotated around the rotation shaft 101 in the range of the substantially fan-shaped fan apex angle α without being dropped by being sandwiched by the substantially fan-shaped bearing holes 2a (see FIG. 3) from both sides. To be fixed. That is, the half mirror 11 can be rotated to the position indicated by the dotted half mirror 11 without the rotation axis being shaken. The shaft of the rotating part is usually thin, but considering that the half mirror 11 is made of glass or synthetic resin, the shaft 11a is made rectangular to increase the strength and reduce the risk of the shaft falling off. Yes. By the same mechanism, the half mirror 12 and the full mirror 13 are also fixed while being able to rotate by the substantially fan-shaped bearing holes 2b and 2c, respectively.

  6 and 7 are diagrams illustrating the strength of the axes 11a, 12a, and 13a of the half mirrors 11 and 12 and the full mirror 13. FIG. FIGS. 6A and 6B are diagrams showing axes having different shapes of d1 and d2. The shafts 11a, 12a, and 13a are all shaped as 100 in FIG. In the case of such a shape, stress concentration with respect to the load often occurs in the corner portions C1 and C2. When the plane stress analysis of the finite element method is performed under the condition that the base B is fixed and the load is applied to the position P, stress concentration of the maximum principal stress occurs in the corner portions C1 and C2.

  It is assumed that the axis of the normal rotating portion is thin, and the maximum principal stress σa at the corner in the case of a shape such as width w: length d1 = 1: 1 as shown in FIG. On the other hand, as shown in FIG. 6B, by setting w: d2 = 1: 5 to a rectangular shape with a long shaft shape, the maximum principal stress σb of the corner portion is about 0.3.

  Since the half mirrors 11 and 12 and the full mirror 13 are made of glass or synthetic resin, the stress at the stress concentration portion should be reduced as much as possible in order to prevent the shaft from falling off. Therefore, in this embodiment, the corner portion stress is reduced by increasing the ratio of the length d2 to the shaft width w. Note that the ratio of width w: length d2 is preferably 1: 4 or more, and by setting the ratio to 1: 5, the stress at the corner portion can be reduced to about one third compared to the case of 1: 1.

  FIG. 7 is a diagram illustrating an example of changing the shape of the shaft. As shown in FIG. 7, the stress can be further dispersed by adding R to corner portions C1 and C2 (see FIG. 6C) where the axes of the half mirrors 11 and 12 and the full mirror 13 are formed. . In this case, the radius r of R is preferably 1/3 to 1/4 of w.

  The rotational movement of the mirror device 80 will be described.

  In the mirror device 80 of FIG. 4, the half mirror 11 is not allowed to rotate because it is in the state of entering the stopper 2d and the claw 2e (see FIGS. 9A, 9B, and 3) provided in the mirror case 2. Is in a state. Similarly, the half mirror 12 and the full mirror 13 are not allowed to rotate by the stoppers 2f and 2h and the claws 2g and 2i. (See FIG. 9A).

  FIG. 8 and FIG. 9 show a state in which the mirror device 80 is rotated around the pivot 2k from the state of FIG. 4 and is put on the main body case 3 containing the 2D image display device 70. FIG. 9A is a partial cross-sectional view of a 3D video display device when viewing a 3D video, and FIG. 9B is a cross-sectional view of a portion indicated by an arrow BB in FIG. 9A. FIG. 9C is a cross-sectional view of a portion indicated by an arrow CC in FIG. 9A. In the state shown in FIG. 9A, the half mirrors 11 and 12 and the full mirror 13 are at predetermined positions with respect to the screen 71, and the state of viewing the 3D video in this embodiment is obtained. The body case 3 and bearing hole 3k, the mirror case 2 and pivot 2k, and the substantially fan-shaped holes 2a, 2b and 2c, stoppers 2d, 2f and 2h, and claws 2e, 2g and 2i are half mirrors for the screen 71 in this state. 11, 12 and the full mirror 13 are arranged so as to be in predetermined positions. The top angles of the substantially fan-shaped holes 2a, 2b, and 2c are about 28 degrees, about 23 degrees, and about 15 degrees, respectively.

  In the state when viewing the three-dimensional image in FIGS. 8 and 9, as shown in FIG. 9C, the mountain-shaped protrusion 2j provided in the mirror case 2 is the same as the valley-shaped protrusion 3j of the main body case 3. It is in the valley part. for that reason. The positions of the mirror device 80 and the body case 3 are fixed to some extent. Since the mirror case 2 and the main body case 3 are made of an elastic synthetic resin such as polypropylene, the mountain-shaped protrusion 2j is detached from the valley-shaped protrusion 3j with a certain amount of force, and the mirror case 2 is rotated. It can be in the state of. It is possible to change from the state of FIG. 4 to the states of FIGS. 8 and 9 for the same reason. Since the mirror device 80 can be easily rotated and moved in this manner, it is possible to easily switch between the state of viewing the 3D image and the state of viewing the screen 71 of the 2D image display device 70. . When the screen 71 has a touch panel, the screen can be touched in the state shown in FIG.

  As described above, in this embodiment, even after mounting, only the part of the mirror device 80 is separated from the screen of the 2D video display device, thereby switching between 2D video and 3D video instantly and with simple operation. It becomes possible to see.

  The folding of the mirror device 80 will be described.

  FIG. 10 shows a state in which the mirror is folded in the mirror case 2 from the state of FIG. 10, when the force P1 is applied, the half mirror 11 gets over the claw 2e and folds to the bottom 2n of the mirror case 2 (see FIG. 3). The half mirror 12 and the full mirror 13 can be folded in the same manner. 11 and 12 show a state in which the mirror case 2 in the state shown in FIG. Unlike the 3D image viewing shown in FIG. 9, the half mirrors 11 and 12 and the full mirror 13 are folded in the mirror case 2, and the mirror device 80 is folded close to the main body case 3 and the 2D image display device 70. It is. It can be seen that the overall volume is reduced compared to the time of viewing in FIG.

  12A is a partial cross-sectional view at the time of folding, FIG. 12B is a cross-sectional view of a portion indicated by an arrow BB in FIG. 12A, and FIG. In (A), it is sectional drawing of the part shown by arrow CC, FIG.12 (D) is sectional drawing of the part shown by arrow DD in FIG. 12 (A). In this embodiment, as shown in FIG. 12B, the half mirror 11 is displaced from the stopper 2d and the claw 2e. Further, as shown in FIG. 12C, the mountain-shaped protrusion 2j deviates from the valley-shaped protrusion 3j.

  As described above, according to this embodiment, it is possible to provide a three-dimensional image display device suitable for storage and carrying by adopting a structure that can be compacted by folding a bulky half mirror.

  FIG. 13 shows a mechanism in which the half mirrors 11 and 12 and the full mirror 13 are folded into the mirror case 2. In FIG. 13A, if the bottom 2n ′ of the mirror case 2 is not flat and is a flat plate, the half mirrors 11 and 12 and the full mirror 13 are folded into the mirror case, and the mirror case 2 is further covered with the main body case 3. It is a figure which shows the state which tried to do. At this time, by reducing the height h1 of the bottom 2n 'when the mirror case 2 is folded from the screen 71 as much as possible, the volume in the folded state can be reduced. However, if this is to be realized, the rotation axis k 'connecting the mirror case 2 and the main body case 3 must be located away from the main body case 3, and the two cannot be combined. Further, when the rotation axis k is arranged in the main body case 3 so that the two can be combined as shown in FIG. 13B, the height h2 when the bottom 2n ′ and the screen 71 are folded is the same as when viewing the 3D image. The height is about 40% of hmax. At this time, the end 2w 'of the mirror case 2 has the highest height, and this height is the height h2 when folded.

  FIG. 13C shows a case where the bottom 2n of the mirror case 2 is folded at the vicinity of the upper end 2v of the full mirror 13. FIG. In this case, since the end 2w of the mirror case 2 approaches the screen 71 by setting the folding angle θ to about 19 degrees, the position 2v of the mirror case 2 is the maximum height, and the height h3 when folded is an ornamental It can be about 30% of the height hmax. Further, since the position 2v having the highest height comes near the center of the bottom 2n of the mirror case 2, it has a non-angular shape in which the center swells compared to FIG. 13B, and is suitable for carrying. Thus, even if the bottom 2n of the mirror case 2 is folded in the vicinity of 2v, there is a space for the full mirror 13 to be accommodated, so that the folding of the full mirror 13 is not affected.

  FIG. 14 is a perspective view showing the upper surface of the mirror case. As shown in FIG. 14, the bottom of the mirror case 2 has U-shaped cuts 2p, 2q, 2r. By applying force P2 such as a finger or hand to the inner part 2s of the U-shaped cut 2p, the inside of the cut can be bent toward the half mirror 11 by the elasticity of synthetic resin. When this operation is performed in the state shown in FIG. 10, the portion 2s hits the half mirror 11 to be pushed out, and can be rotated from the folded state to a position between the stopper 2d and the claw 2e. In this way, the half mirror 11 can be rotated without directly touching the half mirror 11 with a finger or hand. Similarly, the half mirror 12 and the full mirror 13 can be rotated without touching them directly with a finger or the like by applying force to the 2t and 2u portions.

  FIG. 15 is a perspective view showing a main body case 4 having a different form from the main body case 3. The main body case 4 has a shape that covers only the end of the two-dimensional image display device 70 without any gap. FIG. 16 is a cross-sectional view of a state in which the two-dimensional video display device 70 is inserted into the main body case 4 and the mirror case 2 is combined. The body case 4 is also preferably made of an elastic synthetic resin. Further, the main body case 4 and the 2D image display device 70 are not easily detached by frictional force. The bearing hole 4k and the valley-shaped protrusion 4j perform the same functions as the bearing hole 3k and the valley-shaped protrusion 3j of the main body case 3.

As described above, in this embodiment, a mirror device such as a half mirror can be easily attached to and detached from a two-dimensional image display device such as a liquid crystal display, and the mirror device can be folded and made compact. , 3D images can be easily carried and enjoyed.
(2) Second Embodiment Next, a second embodiment of the present invention will be described. FIG. 17 is a diagram showing components of the 3D image display apparatus according to the second embodiment of the present invention. However, this figure does not include a 2D video display device. As shown in FIG. 17, the mirror device 50 includes a mirror case 5a, half mirrors 21 and 22, a full mirror 23, and a main body case 5b. Since the mirror case 5a and the main body case 5b are connected by a hinge portion 5f, it is preferable that the mirror case 5a and the main body case 5b are made by integral molding using a synthetic resin having high hinge resistance such as polypropylene.

  The mirror case 5a has grooves 5c, 5d, and 5e for fixing and mounting the half mirrors 21 and 22 and the full mirror 23. The thicknesses and materials of the half mirrors 21 and 22 and the full mirror 23, the transmittance, and the reflectance are the same as those in the first embodiment, but the shapes are all rectangular.

  The main body case 5b has a shape that covers only the end of the two-dimensional image display device 70 without a gap.

  18 and 19 are views showing a state in which the mirror device 50 is formed by fixing the half mirrors 21 and 22 and the full mirror 23 to the mirror case 5a, and the two-dimensional image display device 70 is put in the main body case 5b. This is a state in which the screen 71 of the two-dimensional video display device 70 is normally viewed.

  20 and 21 are diagrams showing a state in which the mirror case 5a is rotated around the hinge 5f and is put on the screen 71. FIG. In this state, since the half mirrors 21 and 22 and the full mirror 23 are located at predetermined positions with respect to the screen 71, a three-dimensional image can be viewed. Since the mirror device 50 can be easily rotated and moved in this way, it is possible to easily switch between the state of viewing a 3D image and the state of viewing the screen 71 of the 2D image display device 70 in a normal manner. . When the screen 71 is equipped with a touch panel, the screen can be touched in the states of FIGS.

  In the second embodiment, the volume cannot be reduced by folding the part of the mirror device 50 as in the first embodiment. However, the second embodiment has fewer parts than the first embodiment, and the shape of the parts is simple. Therefore, it is possible to reduce the manufacturing cost compared to the first embodiment.

  As described above, in this embodiment, a mirror device such as a half mirror can be easily attached to and detached from a two-dimensional image display device such as a liquid crystal display, and a three-dimensional image can be enjoyed.

  In any of the above embodiments, the case where two half mirrors and one full mirror are provided at the rear thereof has been described. However, the present invention is not limited to this, and three or more half mirrors may be provided.

  As mentioned above, although embodiment of this invention was described with reference to drawings, this invention is not limited to the thing of embodiment shown in figure. Various modifications and variations can be made to the illustrated embodiment within the same range or equivalent range as the present invention.

The 3D image display apparatus according to the present invention can be easily attached to and detached from the 2D image display apparatus, can easily view 3D images without wearing special glasses, and is compactly folded and carried. It is advantageously used as a three-dimensional video display device suitable for the above.

81, 82, 11, 12, 21, 22: Half mirror,
83, 13, 23: Full mirror,
81a, 82a, 83a: Virtual images
2: Mirror case
3, 4: Body case
70: 2D image display device,
71: screen,
50, 80: Mirror device.

Claims (3)

In a three-dimensional video display device that reflects a video displayed on a screen of a video display device using a plurality of mirrors and displays it three-dimensionally,
A body case for mounting the video display device;
A mirror device including a mirror case that is formed integrally with the main body case and in which a plurality of mirrors are arranged and fixed in parallel at a predetermined interval and a predetermined angle in the depth direction;
The mirror case is pivotally supported on a predetermined part of the main body case so as to be rotatable around an axis,
When displaying a three-dimensional image, the mirror case rotates about the axis toward the main body case, and the plurality of mirrors are inclined at a predetermined angle toward the viewer with respect to the screen of the image display device. A three-dimensional video display device characterized by reflecting and displaying an image displayed on the screen of the video display device. The plurality of mirrors are arranged such that the height of the mirrors decreases toward the back, the first and second half mirrors arranged on the side closer to the viewer side, and the first and second mirrors The three-dimensional image display apparatus according to claim 1, further comprising: one full mirror disposed behind the half mirror. 4. The 3D video display device according to claim 1, wherein the main body case houses a portable display device having a screen for displaying a 2D video as the 2D video display device. 5.

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