JP3972385B2 - Multi-view stereoscopic image display device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a multi-view stereoscopic image display device that can be used effectively in the field of viewing and observing stereoscopic images, and can be used in many fields such as TV games, 3D televisions, CAD, and art appreciation.
[0002]
[Prior art]
Examples of conventional techniques include the following which are introduced in a three-dimensional display (written by Chihiro Masuda, Sangyo Tosho). For example, a configuration for displaying a multi-view stereoscopic image using a lenticular lens is introduced in FIGS. 8 and 31 on page 132 of the same document (FIG. 13). In this method, a large number of image projection units are arranged at different positions, and each image is projected onto a lenticular screen, and an observer observes it without glasses.
[0003]
[Problems to be solved by the invention]
However, when a large number of image projectors are used, the apparatus becomes large, and the lenticular lens sheet is also expensive, which has been a hindrance for putting multi-view stereoscopic images into practical use.
[0004]
SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and constitutes a multi-view stereoscopic display device without glasses with a CRT having a size of about 10 to 30 inches that is currently mass-produced as a display, stably and easily, and at a low cost. The purpose is to do.
[0005]
[Means for Solving the Problems]
The present invention includes an image display means including a CRT, the image display means separately, an array of light transmitting portions and light shielding portion so that by transmitting a part of the image displayed on the image display unit An image transmission means; and an image optical path determination means for determining an optical path of an image transmitted through the image transmission means by moving a member in which the light transmission part and the light shielding part are arranged, and the image display means, the image transmission means The image display means repeatedly displays a plurality of images of three or more types, and the image light path determination means corresponds to a switching period of images displayed on the image display means. Then, the optical path of the image is sequentially switched by switching the spatial position of the light transmission part, and the observable positions of the plurality of images are stabilized even if the image display position in the image display means varies. And it is the structure which arranges sequentially in space.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0007]
(First embodiment)
FIG. 1 shows an outline and an optical path of the multi-view stereoscopic image display apparatus according to the first embodiment of the present invention. In FIG. 1, 1 is a display means for displaying an image, 2 is a housing, 3 is an image transmission means, 4 is an image optical path determination means, 5 is a drive means, 6a and b show the positions of the eyes of the observer, 7a , b, c, d indicate optical paths, and 10 indicates optical path control means.
[0008]
2 to 4 show details of the optical path control means of the multi-view three-dimensional image display apparatus according to the present embodiment. In the figure, 8 is a drive coil, 9 is a magnet, 11 is a light emitting means, and 12 is a light receiving means.
[0009]
FIG. 5 is a block diagram showing the image signal of the multi-view stereoscopic image display apparatus of this embodiment and the control of the optical path control means 10. In the figure, numerals 21, 22, 21a and 22a are memories for temporarily storing images, 23 is a buffer for outputting image signals to the monitor 26, 24 is a control means for controlling the memories 21, 22, 21a and 22a, and 25 is an optical path control. A drive control means 26 for controlling the means 10 is a monitor for displaying an image.
[0010]
The operation of the present embodiment configured as described above will be described. The basic principle of displaying a multi-view stereoscopic image is that areas that can be viewed from multiple viewpoints, which have been known for a long time, are sequentially arranged in the space so that images of different viewpoints can be observed depending on the position of the eyes. Is.
[0011]
This embodiment also follows this principle. In order to enable images of different viewpoints to be sequentially arranged and observed in the space, an optical path control means 10 is provided in front of the image display means (CRT) 1 in FIG. The optical path control means 10 determines the optical path by the image transmission means 3 and the image optical path determination means 4.
[0012]
In the figure, the optical paths are sequentially switched as 7a, 7b, 7c, 7d, a7, 7b, 7c, 7d,. In synchronization with this, the display image of the display means 1 is switched to images corresponding to the image observation points A, B, C, and D of the respective optical paths.
[0013]
In FIG. 2, the black portions of the image transmitting means 3 and the image light path determining means 4 absorb light, and the white portions transmit light. The direction in which the light of the image displayed on the CRT 1 travels is determined by the positional relationship of the light transmission / absorption means. In the state shown in the figure, the light travels in the direction indicated by 7d, the image light path determining means is sequentially shifted by the driving means 5a, b, and the light transmitting portion is moved little by little, and the light 7a, 7b, 7c, It is controlled so as to proceed sequentially in the direction of 7d.
[0014]
The direction of the light is determined only by the relative positional relationship between the image transmission means 3 and the image optical path determination means 4, and the direction in which the image travels as light does not change even if the display position of the image on the CRT 1 changes somewhat.
[0015]
FIG. 5 shows a configuration for performing the above operation. Images from different viewpoints are input signals 1, 2, 3, and 4, which are written in temporary memories 21, 22, 21a, and 22a, sequentially transferred to a buffer, and displayed on a monitor. The control unit 24 controls the input signals 1, 2, 3, and 4 to be switched sequentially, and the drive control unit 25 is switched so that the optical path control unit 10 sequentially switches to the optical paths shown in FIGS. Make it work. FIGS. 6 and 7 show the timing of switching the image signal described above. In FIG. 6, the image is switched to 1, 2, 3, 4, 1, 2, 3, 4,... According to the vertical synchronization signal. Thus, the optical path is sequentially switched by the operation of the optical path control means 10. The image switching may not be the same as in FIG. 6, for example, as shown in FIG. 7, 1, 2, 3, 4, 3, 2, 1, 2, 3, 4,. You may switch to a wave form.
[0016]
This is because in the method of the present invention, the change in the position of the image does not cause crosstalk between the left and right images, but merely increases or decreases the parallax.
[0017]
In addition, absolute positional accuracy is not required, and only a relative position difference becomes an error with respect to parallax. Therefore, a slow change in absolute position does not cause any problem as a stereoscopic image. Therefore, the image display means 1 can also be applied to a CRT system in which the display position changes somewhat depending on the brightness of the image. This is an advantage that accurate alignment of each image is not required, unlike the conventional technique combining a lenticular screen and an image projection apparatus. 3 and 4 show the light traveling direction of the display image determined by the image transmission means 3 and the image light path determination means 4 in more detail.
[0018]
If the light transmission part of the image light path determining means 4 is arranged without interruption as shown in FIG. 3, the main lobe and the sublobe are connected, and the observer moves the head from the left to the right, 7a, 7b, 7c, 7d, 7a. , 7b, 7c, 7d... Are sequentially displayed in a cyclic manner. At this time, the viewpoint position of the display image becomes discontinuous at the moment of shifting from the main lobe observation to the sublobe observation.
[0019]
As shown in FIG. 4, in the light transmission part of the image light path determination means 4, when the light blocking part α is provided between the main lobe and the sublobe, the observer can see 7a, 7b, 7c, 7d, forbidden band, 7a, 7b, 7c, 7d, forbidden band, and so on.
[0020]
That is, there is a forbidden band where nothing is displayed in the discontinuous part of the displayed multi-view stereoscopic image, and the observer can easily recognize the position where the viewpoint is discontinuous.
[0021]
Next, control of the optical path control means will be described.
The image transmitting means 3 is arranged in front of the CRT, and when an image is observed through the image optical path control means 4 arranged further in front of this, for example, in the state of FIGS. 2 to 4, the image is observed through the optical path 7d. The
[0022]
At this time, no image is observed through the other optical paths 7a to 7c. At this time, crosstalk between different images can be reduced by setting the light transmitting portion of the image light path determining means 4 to be narrower than the light blocking portion so that the optical paths 7a to 7c do not overlap in space. However, since the brightness of the screen decreases if the width is narrow, care must be taken when setting the width of the light transmitting portion.
[0023]
Next, in a state in which the image optical path control means 4 has moved a little, an image is observed through the optical path 7c, and the position of the image optical path control means 4 changes sequentially to change to the optical paths 7b and 7a.
[0024]
The image optical path control means 4 is held by the drive means 5a and 5b, and by passing a drive current through the drive coil 8, it receives a drive force from the magnetic field by the magnet 9 and moves a minute amount in the direction indicated by the arrow. As shown in FIGS. 6 and 7, the drive current is changed in synchronization with the vertical synchronization signal, and images are presented for each field at positions A to D in FIG. When the field frequency is 120 Hz, the field frequency for one eye is 30 Hz. In order to eliminate the influence of image flicker, the field frequency needs to be 240 Hz. In the present embodiment, a four-eye stereoscopic image is used. However, the required field frequency increases as the number of eyes increases.
[0025]
Next, a method for accurately moving the image optical path determination means 4 by a certain amount will be described below. The drive control of the image optical path determination unit 4 is performed by detecting the position by the light emitting unit 11 and the light receiving unit 12 and performing feedback control. FIG. 8 shows how the level of light received by the light receiving means 12 changes depending on the relative position with respect to the light emitting means 11. In FIG. 8, 11 is a light emitting means for converting signals modulated at three different frequencies into light, and 4 is an image optical path control means.
[0026]
As shown in FIG. 8, the three light sources of the light emitting means have an interval of points at which there is no difference in the level of light from adjacent light sources when the light is received × the number of viewpoints of the displayed image is equal to the pitch of the image light path control means 4. Arrange to match half length.
[0027]
FIG. 9 is a block diagram showing an example of the configuration of the drive control means 25.
In FIG. 9, 31 is a demodulator that demodulates the output of the light receiving means 12 and outputs the levels C1, C2, C3, C4, and C5 of the three light sources of the light emitting means 11, and 32a and 32b compare the light receiving levels of adjacent light sources. The subtractor 34 is a fine adjustment means for optimizing the observation state at the observer's position, and 33 is a drive signal generating means. The demodulating unit 31 demodulates the output of the light receiving unit 12 for each modulation frequency, and outputs light levels C1, C2, C3, C4, and C5 corresponding to different modulation frequencies. Demodulation is performed in a period other than the period in which the level of the drive current changes, as shown in FIGS.
[0028]
The subtractors 32a, 32b, 32c, and 32d each output a difference in light reception level between adjacent light sources. Further, the fine adjustment means 34 outputs a fine adjustment signal Δ for optimizing the observation state at the observer's position. The drive signal generating means 33 outputs the drive current in synchronization with the vertical synchronization as shown in FIGS. 6 and 7, and drives the drive coil means 8. The levels L1 to L4 of the drive current are controlled so as to converge to the target value by feedback control shown in (Equation 1).
[0029]
(Formula 1)
L1 = L10−k1 (C2−C1) + Δ
L2 = L20−k2 (C3−C2) + Δ
L3 = L30−k3 (C4−C3) + Δ
L4 = L40−k4 (C5−C4) + Δ
However, k1 to K4> 0
By controlling in this way, the relative positions of the image transmission means 3 and the image optical path control means 4 are stably controlled, and each image passes through the optical paths 7a to 7d and passes through the spatial positions A to D, respectively. Each image can be observed at the position.
[0030]
As described above, according to the present embodiment, even when a CRT whose image display position is not stable is used as the display means, the light path control means 10 can stably control the direction of light in a predetermined direction. A stable stereoscopic image can be displayed without glasses.
[0031]
(Second Embodiment)
FIG. 10 is a block diagram for explaining the image signal of the stereoscopic display device and the control of the optical path control means 10 in the second embodiment of the present invention, wherein 1 is a display means for displaying an image, and 3 is an image. Transmitting means, 4 is an image optical path determining means, 5a and b are driving means, 11 is a light emitting means, and 12 is a light receiving means.
[0032]
The above configuration is the same as the configuration of the first embodiment, and is different from the configuration of the first embodiment in that the linear moving unit 40 that moves the position of the light receiving unit 12, the image optical path determination unit 4, and the image Thickness control means 41a, b for changing the distance of the transmission means 3 are newly added, and the drive control means 25 controls the linear moving means 40 and the thickness control means 41a, b in addition to the light emitting means 11 and the light receiving means 12. The point is that the three-dimensional position of the observer's viewpoint is detected by the magnetic field generation means 43, the magnetic field detection coil 42, and the three-dimensional position measurement means 44.
[0033]
The second embodiment configured as described above will be described below. The basic principle of displaying a stereoscopic image is the same as in the first embodiment, and the optical path control means 10 sequentially determines the optical paths of a plurality of images by the image transmission means 3 and the image optical path determination means 4.
[0034]
In the first embodiment, when the observer moves to the left and right, images of a plurality of viewpoints can be observed sequentially. However, if the observer moves to the optical paths 7a to 7b observed with the main lobe in the case of FIGS. Next, since the image of the side lobe is observed, the image jumps to 7a, and this is repeated.
[0035]
Also, if the observer moves in the front-rear direction, the eyes will be misaligned with the optical path, making it impossible to observe the stereoscopic image. The second embodiment eliminates this point.
[0036]
First, the principle of a method for allowing a stereoscopic image to be always observed with respect to the observer's viewpoint movement will be described with reference to FIG.
[0037]
FIG. 11A shows a case where the observer moves left and right parallel to the CRT, and FIG. 11B shows a case where the observer moves back and forth perpendicularly to the CRT. In FIG. 11A, it is assumed that the light on the surface of the CRT is incident on the observer's eyes D through the transmission region C of the image transmission unit 3 and the transmission region A of the image optical path determination unit 4.
[0038]
Here, when the position of the observer's eye D changes to E, in order to make the light from the same image incident on the eye E, the light is image light path so that the center of the transmission region of the image light path determining means 4 is B. What is necessary is just to move a determination means horizontally to right and left. At this time, if the horizontal movement amount of the eye is Δx, the distance between the image transmission means 3 and the image optical path determination means 4 is d, and the viewing distance is L, the horizontal movement amount Δw of the image transmission means is
(Formula 2)
Δw = d / L × Δx
It is represented by
[0039]
Further, as shown in FIG. 11B, when the observer's eyes have moved by ΔD from G to H in the front-rear direction, the distance d between the image transmission means 3 and the image optical path determination means 4 is changed by Δz. Good.
[0040]
The amount of change Δz at this time is
(Formula 3)
Δz = d / L × ΔD
It becomes.
[0041]
In this way, the movement of the observer's eyes is measured, and by changing the position of the image optical path determining means 4 and the distance between the image transmitting means 3 and the image optical path determining means 4 based on this, it is always possible to observe the eyes of the observer. The light path can come to the position. Actually, in the method described in the first embodiment, the position of the light receiving means 12 is moved by the linear moving means 40 in accordance with the left / right movement of the observer's eyes (FIG. 9).
[0042]
Further, the distance between the image transmitting means 3 and the image optical path determining means 4 is changed by the thickness control means 41a, b in accordance with the movement of the observer's eyes in the front-rear direction.
[0043]
When the observer's eyes move left and right, first, the amount of movement in the left-right direction is measured by the magnetic field generation means 43, the magnetic field detection coil 42, and the three-dimensional position measurement means 44 shown in FIG. The means for measuring the three-dimensional position of an observer using such a magnetic field is the same as that often used in recent virtual reality technology (Reference: Supervision of Fundamentals of Three-Dimensional Video, Izumi Takehiro, Ohm Corporation 1995PP. 210-213). This is because three types of magnetic fields orthogonal to each other are generated from the magnetic field generating means 43, detected by three types of coils wound in directions orthogonal to each other, and calculated by the three-dimensional position measuring means 44. The three-dimensional position and rotation angle (yaw, pitch, roll) of this coil are measured.
[0044]
Using the observer's horizontal movement amount Δx and the observer's viewing distance L thus obtained, the drive control means 25 obtains the movement amount Δw of the image optical path determination means 4 from Equation 2, and from this, the drive currents L1 to L4. (See FIGS. 6 and 7) is determined by (Equation 1). Here, the drive control means 25 determines the magnitude of the fine adjustment signal Δ so that the movement amount Δw of the image optical path determination means 4 and the movement amount of the light receiving means 12 by the linear movement means 40 are equal.
[0045]
By controlling in this way, the positional relationship between the light emitting means 11 and the light receiving means 12 can be kept constant even if the position of the observer's eyes moves left and right, and the relative relationship between the image transmitting means 3 and the image optical path control means 4 can be maintained. The position is stably controlled, and the image for the right eye passes through the optical path 7b and enters the right eye, and the image for the left eye passes through the optical path 7a and enters the left eye, and is recognized as a stereoscopic image.
[0046]
However, in this case, since the observed image is the same even if the observer moves, one of the advantages of multi-view stereoscopic image display is motion parallax (the different directions of the subject as the observer moves). The effect of producing a three-dimensional effect) cannot be observed. However, if the head is appropriately placed in the observation area, two of the four images are incident on the eyes, so that it is easy to see with both eyes first, and there are no discontinuities in the displayed image even if the image is moved to the left or right.
[0047]
In the above case, control is performed so that the same image is observed when the observer moves. For example, in FIGS. 2 to 4, the observer observes 7b and 7c with the left eye and the right eye, respectively. In this case, until the observer moves to the right and observes 7c and 7d, the image optical path determination means 4 is not controlled, and only when it exceeds this, the image optical path determination means 4Δw is calculated only for the excess. You can also In this case, the movement parallax can be displayed for the movement of the observer in the multi-view stereoscopic image observation area, and if the observer moves outside the multi-view stereoscopic image observation area, the observation range is set as the image optical path determining means only for the movement. The discontinuous point of the display image can also be removed by the movement of 4 in the left-right direction.
[0048]
When the observer moves left and right beyond the multi-view stereoscopic image observation range, the image optical path determination means 4 is moved rightward to remove discontinuities in the display image. 7c and 7d in FIGS. 2 to 4 are observed. Considering the case where the observer moves further to the right, it is determined from the output of the three-dimensional position measuring means 44 that the observer is stationary. In this case, the observer is at the center of the main lobe in FIGS. If the three-dimensional position measuring means 44 is gradually moved so as to observe the images, that is, 7b and 7c, the observer can always obtain a stereoscopic effect due to motion parallax.
[0049]
When the observer's eyes move in the front-rear direction, the drive control means 25 gives a command to change the distance d between the image transmission means 3 and the image optical path determination means 4 by Δz according to (Equation 3), the thickness control means 41a, Tell b. The thickness control means 41a, b changes the distance d between the image transmission means 3 and the image optical path determination means 4 by Δz by moving the positions of the driving means 5a, b back and forth. Thereby, even if the position of the observer's eyes moves back and forth, a predetermined image can always be displayed on each of the left and right eyes.
[0050]
As described above, according to the present embodiment, even if the position of the observer's eyes moves, the direction of light can always be controlled by the eyes of the observer, and the stereoscopic image display without glasses having a wide image observation range. A device can be realized.
[0051]
In the second embodiment, the movement of the observer's eyes changes not only in the front / rear / left / right movement of the head but also in accordance with the inclination of the observer's head. In particular, when the head moves in the left-right direction, the head often tilts greatly to the left and right. In order to solve the shift of the eye position due to this, the position of the magnetic field detection coil 42 mounted on the observer's head and the positional relationship between the left and right eyes are measured in advance, so that the eye position can be accurately determined. Thus, an accurate image can be made visible to the left and right eyes even when the observer's head is tilted.
[0052]
Although the direct-view type CRT is used as the display means of the stereoscopic image display apparatus according to the present embodiment, it is not necessarily limited to the direct-view type CRT, and may be a projection type using the CRT. Further, the present invention can be applied not only to a CRT but also to a plasma display or a liquid crystal display, and is included in the present invention. In the case of a plasma display or a liquid crystal display, since the pixels are fixed at a fixed position, it is preferable that the image transmission means correspond to the cycle of the pixels. An integer multiple is suitable without moire. Further, when the light emitting portion of the display is the same or narrower than the non-light emitting portion, the image transmission means may not be used.
[0053]
Further, in each of the above embodiments, the operations of the image optical path determination means 4 and the drive means 5a and b vibrate the horizontal position of the vertical stripe at high speed, and the positional relationship between the light transmitting part and the light blocking part is high speed. This movement may be realized by using a transmissive liquid crystal element.
[0054]
FIG. 12 shows an example in which the image optical path determination unit 4 and the driving units 5a and 5b are realized using liquid crystal elements. FIG. 12 does not show a specific driving circuit for each pixel of the liquid crystal, but this is realized by using a commonly used technology such as STN, TFT liquid crystal display panel, or the like. In FIG. 12, the shaded area is an area that blocks light, and the other area is an area that transmits light. The light blocking / transmitting operation is realized by controlling the voltage for driving the liquid crystal.
[0055]
By sequentially switching FIGS. 12A to 12D in synchronization with the field period of the image signal, the optical path can be changed as shown in FIGS. 7A to 7D. An enlarged view is shown on the right side of the figure. Each light transmitting / blocking stripe is composed of a plurality of pixels, and a minute stripe position is changed by shifting the stripe region by one pixel.
[0056]
In FIG. 12, reference numeral 4 denotes an image optical path determination means, which covers the entire CRT screen with three liquid crystal elements 51, 52, and 53. An operation of exchanging the light blocking portion (shaded portion) and the light transmitting portion (not shaded portion) of the liquid crystal elements 51, 52, 53 is performed at the timing of vertical synchronization of the input image by a signal from the drive control means 25 in FIG. However, since the operation of the liquid crystal element is slow in time at this time, it takes time to invert the position of the vertical stripe on the entire screen, and crosstalk occurs between the left and right images. Therefore, by using the timing of image scanning in the CRT, the liquid crystal driving means 54 divides the period from one vertical synchronization time to the next vertical synchronization time into three, and sends commands to the liquid crystal elements 51, 52, 53 in order. In the vertical period, the vertical stripe positions of the liquid crystal elements 51, 52, and 53 are reversed in order, so that crosstalk between the left and right images is prevented even with a liquid crystal element that operates slowly.
[0057]
As described above, by realizing the image optical path determination means 4 with a liquid crystal element, it can be operated in a purely electronic manner without using mechanical vibration, and the reliability of the apparatus can be improved. Further, in this case, since the liquid crystal element is not spatially shifted, feedback control by the issuing means 11 and the light receiving means 12 is not necessary.
[0058]
【The invention's effect】
As described above, according to the present invention, even when a CRT whose image display position is unstable is used as the display means, the light path control means can stably control the direction of the light in a predetermined direction, and the observer can move. Even so, a stable multi-view stereoscopic image can be displayed without glasses.
[Brief description of the drawings]
FIG. 1 is a diagram showing an outline of a configuration of a multi-view stereoscopic image display device according to a first embodiment of the present invention. FIG. 2 is a diagram showing a configuration of an optical path control means of the multi-view stereoscopic image display device. FIG. 4 is a diagram showing a configuration example of the optical path control means of the multi-view stereoscopic image display device. FIG. 4 is a diagram showing another configuration example of the optical path control means of the multi-view stereoscopic image display device. FIG. 6 is a block diagram showing signal processing of the multi-view stereoscopic image display apparatus according to the first embodiment. FIG. 6 is a diagram showing an example of temporal control of the image optical path determining means of the present invention. FIG. 8 is a diagram illustrating another example of temporal control. FIG. 8 is a diagram illustrating characteristics of a light receiving unit used in the present invention. FIG. 9 is a diagram illustrating a configuration of a drive control unit used in the present invention. FIGS. 11A and 11B are diagrams showing a configuration of a multi-view stereoscopic image display apparatus according to an embodiment of the present invention. FIGS. FIGS. 12A to 12D are diagrams showing an image optical path changing operation with respect to an observer's movement of the image display device. FIGS. 12A to 12D are liquid crystal elements. Fig. 13 is a block diagram showing a conventional multi-view stereoscopic image display device.
DESCRIPTION OF SYMBOLS 1 Display means 2 Housing 3 Image transmission means 4 Image optical path determination means 5 Driving means 6 Eye position 7 Optical path 8 Driving coil 9 Magnet 10 Optical path control means 11 Light emitting means 12 Light receiving means 21, 22, 21a, 22a Memory means 23 Buffer Means 24 Control means 25 Drive control means 26 Image display means 31 Demodulation means 32 Subtractor 33 Drive signal generation means 34 Fine adjustment means 40 Linear movement means 41 Thickness control means 42 Magnetic field detection coil 43 Magnetic field generation means 44 Three-dimensional position measurement means

Claims (2)

Image display means comprising a CRT ;
Separately from the image display means, an image transmission means having an array of light transmitting portions and light shielding portion so that by transmitting a portion of an image displayed on the image display means,
An image light path determining unit that moves a member in which a light transmitting part and a light shielding part are arranged and determines an optical path of an image transmitted through the image transmitting unit ;
Arranged in the order of the image display means, the image transmission means, the image optical path determination means,
The image display means sequentially displays a plurality of images of three or more types, and the image light path determination means determines the spatial position of the light transmission portion corresponding to the switching period of the image displayed on the image display means. By sequentially switching the optical path of the image,
A multi-view three-dimensional image display device characterized by having a configuration in which the observable positions of the plurality of images are stably and sequentially arranged in a space even when the image display position in the image display means varies. The image optical path determination means provides a light-shielding region between light transmitting portions that determine the optical path of an image, and provides a region where multi-view stereoscopic image observation is not possible between a main lobe and a side lobe, or between side lobes, The multi-view stereoscopic image display apparatus according to claim 1, wherein a discontinuous point of the multi-view image can be easily recognized by an observer.

Images