JPH06339156A - Method and device for displaying three-dimensional picture - Google Patents

Abstract

PURPOSE:To provide a method and device for displaying a three-dimensional picture with a wide visual field while displaying a very large three-dimensional picture as well. CONSTITUTION:A proper display spatial atmosphere is formed in the inside of a display structure 1 covered with a translucent member and parabolic antenna groups 2YZ, 2XY are arranged on two side faces of the display structure 1. A scanning control circuit 5 controls changeover circuits 3a, 3b to select a couple of parabolic antennas from the parabolic antenna groups 2YZ, 2XY and to which microwaves M1, M2 are emitted in two directions. A plasma is generated at a cross point P1 of the microwaves M1, M2 and it is used for a spot. The spot is scanned in the display spatial atmosphere by the changeover control of the scanning control circuit 5 to display a three-dimensional picture Q.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a television,
The present invention relates to a stereoscopic image display method and apparatus applied to a stereoscopic image display monitor in an OA device or the like, or a stereoscopic movie, a stereoscopic image display device for advertisement, and the like, and particularly to a display technique suitable for obtaining a huge stereoscopic image. .

[0002]

2. Description of the Related Art Conventionally, holography using a laser is well known as a stereoscopic image display method, and recently, a display device in which a plurality of plasma displays are stacked (for example, Japanese Patent Laid-Open No. 62-76135). Japanese Patent Laid-Open No. 5-
2368) has been proposed.

[0003]

However, the conventional example having such a structure has the following problems. According to holography, a still image can be stereoscopically displayed, but it is extremely difficult to display a stereoscopic image with continuous movement. In addition, the viewing angle at which a stereoscopic image can be viewed is narrow, and it is difficult to obtain a huge stereoscopic image.

On the other hand, in the case of a display device using a multi-layer plasma display, it is difficult to make it large in size due to its structure. Also, if too many plasma displays are stacked, the transparency will drop, so naturally the number of stacked displays is limited, and therefore, Another problem is that the viewing angle is narrow.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a stereoscopic image display method and apparatus capable of displaying a huge stereoscopic image and having a wide viewing angle. I am trying.

[0006]

The present invention has the following constitution in order to achieve such an object. That is, the stereoscopic image display method according to claim 1 radiates electromagnetic waves having directivity from at least two directions into an appropriate display space atmosphere to generate bright spots at the intersections of the electromagnetic waves, By changing the irradiation direction of electromagnetic waves, the bright spots are scanned within the display space atmosphere to display a stereoscopic image.

According to a second aspect of the present invention, there is provided a three-dimensional image display device, which is covered with a translucent member and has an appropriate display space atmosphere formed therein, and the display structure. Electromagnetic wave irradiating means for irradiating the inside with directional electromagnetic waves from at least two directions to generate bright spots at intersections of the electromagnetic waves in the display space atmosphere, and irradiation directions of the respective electromagnetic waves radiated from the electromagnetic wave irradiating means. And a scanning control unit for scanning the bright spots in the display space atmosphere to display a stereoscopic image.

[0008]

The operation of the present invention is as follows. According to the method of claim 1, in the display space atmosphere, a bright spot is generated at an intersection of electromagnetic waves irradiated from at least two directions, and the bright spot is scanned by changing the irradiation direction of each electromagnetic wave. As a result, a stereoscopic image is displayed in the display space atmosphere.

According to the apparatus of the second aspect, the electromagnetic wave irradiating means irradiates the display structure with the electromagnetic waves from at least two directions, and produces bright points at the intersections of the electromagnetic waves. Then, the scanning control means controls the irradiation direction of each electromagnetic wave to scan the bright spots in the display space atmosphere and display a stereoscopic image.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. <First Embodiment> FIG. 1 is a view showing the schematic arrangement of a stereoscopic image display apparatus according to the first embodiment.

In FIG. 1, reference numeral 1 is a display structure in which a display space atmosphere described later is formed. The display structure 1 has a hollow cubic structure of about 10 m in each of the X, Y, and Z directions for the purpose of obtaining a huge stereoscopic image, and the four side surfaces 1a to 1d are, for example, an acrylic resin plate, a glass plate, or a transparent plate. It is covered with a transparent member such as a ceramic plate. However, the display structure of the present invention is not limited to such size and shape, and is appropriately formed according to the purpose. In order to prevent electromagnetic waves from leaking to the outside, it is preferable to cover the surface of the transparent member with a transparent metal thin film for absorbing electromagnetic waves or a metal net.

Two side surfaces 1e, 1 of the display structure 1 which are orthogonal to each other
In f, a parabona antenna group 2 as an electromagnetic wave irradiation means
_YZ and 2 _XY are deployed. In this embodiment, each parabona antenna group 2 _YZ , 2 _XY is configured by arranging 100 parabona antennas 2 each having a diameter of about 10 cm vertically and horizontally, so that a total of 10,000 parabona antennas 2 are two-dimensionally arranged. There is.

The diameter of the parabona antenna 2 is appropriately set according to the size of one pixel, and the number thereof is appropriately set according to the number of pixels of the display device. In this embodiment, the parabona antenna groups 2 _YZ and 2 _XY are configured as described above, and there are 100 in each of the X, Y and Z directions, for a total of 10.
A three-dimensional image is displayed with 0,000 pixels. However, in the drawing, the number of parabona antennas is reduced for convenience of drawing.

The parabona antenna group 2 _YZ is connected to the microwave oscillation circuit 4a via the switching circuit 3a. In addition, the parabona antenna group 2 _XY includes a switching circuit 3
It is connected to the microwave oscillation circuit 4b via b.
The switching circuits 3a and 3b are switched and controlled by the scanning control circuit 5, respectively, to supply microwaves to the pair of parabona antennas 2 which are sequentially selected from the parabona antenna groups 2 _YZ and 2 _XY. There is.

As shown in FIG. 2, in this embodiment, one parabona antenna 2 _YZi which is sequentially selected from the parabona antenna group 2 _YZ and one parabona antenna group 2 _XY which is sequentially selected from the parabona antenna group 2 _XY. Microwaves M ₁ and M ₂ are simultaneously _radiated from two parabona antennas 2 _XYi to intersect the _two microwaves M ₁ and M ₂ in the display space atmosphere, and the plasma generated at the intersection P _i is a bright spot. Is used as. As a display space atmosphere for generating plasma,
Atmosphere in which powder of metal or intermetallic compound and oxygen (air) coexist, or powder of metal or intermetallic compound,
An atmosphere in which oxygen (air) and water vapor coexist is preferable.

Examples of the above metals include Al, Cu,
Besides simple metals such as Mg, Sn, Ni, Co, Fe, Zn, Ag, and Au, alloys such as brass can also be used. Further, as the intermetallic compound, for example, CuZn, A
g ₃ Al, Cu ₅ Sn, Cu ₅ Zn ₈ , CuZn ₃ , F
e ₃ Al, Fe ₃ Ti, MnAu ₄ , Mn ₄ N and the like. The particle size of the powder is 0.01 to 10 μm, preferably 1
˜5 μm, and the powder density in the space is 10 ² to 1
0 ⁵ / cm ³ is preferred. In order to evenly distribute these powders in the display structure 1, the blower fan 6 is arranged at an appropriate position in the display structure 1 in the apparatus of this embodiment.

Next, the operation of the above-described embodiment apparatus will be described. The scanning control circuit 5, as shown in FIG. 3, has discrete points n _i (i = 1, 2 ,,) along the contour of the solid to be displayed.
3, three-dimensional coordinates of _{......) (x i, y i} , based on z _i), from the parabolic antenna group 2 _YZ, 2 _XY, for lighting the pixel P _i that corresponds to the discrete points n _i The two parabona antennas 2 are determined and the switching circuits 3a, 3
b is controlled by switching. Here, as shown in FIG. 2, parabolic antenna 2 _YZi from the parabolic antenna group 2 _YZ is, a parabolic antenna 2 _xyi is selected from the parabolic antenna group 2 _XY.

[0018] As a result, the irradiated microwave M _1, M ₂ from the parabolic antenna 2 _YZi and 2 _xyi, these microwave M _1, M ₂ pixels P _i of the display space atmosphere
It intersects at the point where it hits, and high energy is obtained at this intersection. Here, by setting the energy of each of the microwaves M ₁ and M ₂ to be slightly lower than the energy at which the plasma state is obtained, plasma can be generated only at the intersection points. In this embodiment, the luminous state of this plasma is used as a bright spot. Although the mechanism of plasma generation is well known and will not be described in detail, free electrons in particles such as metal floating in the display space atmosphere move due to fluctuations in the electric field at the intersection of the microwaves M ₁ and M _2. As a result, positive (+) and negative (-) polarization is generated in the particles, which interacts with oxygen in the air to generate plasma.

The microwaves M ₁ and M ₂ are appropriately adjusted to have such power that visible light is generated at their intersections.
It is also possible to change the brightness and color of the bright spot by changing the microwave power and the type of metal powder in the atmosphere.

The scanning control circuit 5 sequentially switches the switching circuits 3a and 3b according to the coordinates of the discrete points n _i of the contour of the stereoscopic image, and selects an appropriate pair of parabona antennas from the parabona antenna groups 2 _YZ and 2 _XY. The bright spots are scanned by sequentially selecting the antennas 2, and a huge stereoscopic image Q is displayed in the display structure 1.
Is displayed. According to the apparatus of this embodiment, the stereoscopic image Q can be seen from the four side surfaces 1a to 1d of the display structure 1 covered with the translucent member, and an extremely wide field of view can be obtained. It is also easy to display a moving stereoscopic image by temporally changing the data (coordinates of discrete points) of the display image.

In the first embodiment described above, the plasma generated in the display space atmosphere is used as the bright spot.
The present invention is not limited to this. For example, the display structure 1
A similar low-temperature ignitable gas such as phosphorus is enclosed in the inside, and the power of each microwave is adjusted so that the gas is ignited at the intersection of the microwaves irradiated from two directions. Can be realized.

Also, Soviet Nobel Prize physicist Kapitza has shown that a plurality of electromagnetic waves having a wavelength of several tens of centimeters interfere with each other in the normal atmosphere and become strong, and the atmosphere is ionized to generate a plasma state. According to the document, especially when the size of the plasma is about the wavelength, the electromagnetic wave is strongly absorbed by the plasma, and all the energy of the electromagnetic wave is converted into the energy of the plasma. Therefore, if the conditions are satisfied, it is possible to realize the same stereoscopic image display even in the normal atmosphere.

Further, in the first embodiment, the display structure 1
Parabona antenna groups 2 _YZ and 2 _XY are provided on the two sides of
Parabona antenna groups may be provided on three orthogonal side surfaces of the display structure 1 so that bright points are generated at the intersections of the microwaves irradiated from the three directions.

Although the parabona antenna is used as the electromagnetic wave irradiating means in the embodiment, it may be constituted by using a waveguide or an electromagnetic wave generating element. Further, the electromagnetic waves are not limited to microwaves.

<Second Embodiment> In the first embodiment, the bright spots are scanned by switching and controlling a large number of parabona antennas, but in the device according to the second embodiment, the microwaves from the two parabona antennas are scanned. Bright spots are scanned by controlling the irradiation direction. Hereinafter, description will be given with reference to FIG.

Parabona antennas 2 ₁ and 2 ₂ are installed at appropriate two positions of the display structure 1 similar to the first embodiment, and the microwave M ₁ emitted from these parabona antennas 2 ₁ and 2 _{2 is provided.} , M ₂ are reflected by the reflection mirrors 7 ₁ and 7 ₂ to generate intersections (bright spots) P of the microwaves M ₁ and M _{2 in} the atmosphere of the display space. The method of generating plasma at the intersection point P of the microwaves M ₁ and M ₂ is the same as that in the first embodiment, and therefore the description thereof is omitted here.

The reflecting mirrors 7 ₁ and 7 ₂ are driven by a driving mechanism 8
_The angle can be set in any direction of X, Y and Z by ₁ , 8 ₂ . The scan control circuit 9 includes a drive mechanism 8
By applying a control signal to ₁ and 8 ₂ , the microwave M
Scan the bright spots by changing the irradiation directions of ₁ and M ₂ . As a result, a stereoscopic image Q similar to that of the first embodiment is displayed in the display space atmosphere.

According to this embodiment, the number of parabona antennas is smaller than that of the first embodiment, so that the structure of the entire apparatus is simplified.

In the second embodiment, the reflecting mirrors 7 ₁ ,
Although the irradiation directions of the microwaves M ₁ and M ₂ are changed by using 7 ₂ , the irradiation directions of the microwaves M ₁ and M ₂ may be changed by moving the parabona antennas 2 ₁ and 2 ₂ .

Also, in the present embodiment, as in the first embodiment,
A low temperature ignitable gas such as phosphorus may be used, an electromagnetic wave irradiation means such as a waveguide may be used, or microwaves may be irradiated from three or more directions to generate bright spots at the intersections. . Further, the electromagnetic wave is not limited to the microwave.

<Third Embodiment> In each of the above-described embodiments, an electromagnetic wave having a wavelength longer than that of visible light is used, but in this embodiment, the wavelength is shorter than visible light and the frequency is different from at least two directions. Electromagnetic waves are radiated toward the atmosphere of the display space having light-scattering properties, a bright spot is generated by causing modulation of both electromagnetic waves at the intersection, and a stereoscopic image is displayed by scanning the bright spots. ing. Below, FIG.
It will be specifically described with reference to.

In the figure, reference numeral 11 is a display structure whose entire peripheral surface is covered with a light-transmissive member, in which light is scattered (for example, fine powder of alumina, silica, metal, etc.,
A display space atmosphere in which water vapor, smoke of a substance, etc.) is suspended is formed. An appropriate 2 outside the display structure 11
Ultraviolet laser light sources 12 ₁ and 12 with different frequencies
₂ are deployed. An acousto-optic deflecting element (AO) for scanning the laser light on the optical path of each laser light source 12 ₁ , 12 _2.
D) 13 ₁ and 13 ₂ , each acousto-optic deflection element 1
Choppers 14 ₁ and 14 for chopping laser light between 3 ₁ and 13 ₂ and laser light sources 12 ₁ and 12 _2.
Two are intervening. Scanning / brightness control circuit 15
Controls the irradiation direction of the laser light by changing the voltage applied to the acousto-optic deflecting elements 13 ₁ and 13 ₂ and also controls the chopping time by the choppers 14 ₁ and 14 ₂ .

The operation of the apparatus of this embodiment will be described below. For example, the laser light source 12 ₁ to 1.000 × 10 ¹⁶ Hz ultraviolet laser light L ₁ and the laser light source 12 ₂ to 1.060 × 10 ¹⁶ Hz ultraviolet laser light L ₂ are respectively displayed. Irradiate so as to intersect inside. Then, as shown in FIG. 6, both laser beams L ₁ ,
The modulated wave ML is generated at the intersection P of L ₂ . This modulated wave M
L becomes visible light of 6.0 × 10 ¹⁴ Hz. Laser light L
Visible light at the intersection P of ₁ and L ₂ is scattered by the light scattering substance in the display space atmosphere and can be seen from the entire periphery of the display structure 11. In this embodiment, this is used as a bright spot. Since the laser beams L ₁ and L ₂ are ultraviolet rays, even if they are scattered by the scattering material, they are invisible except at the intersection.

[0034] By changing appropriately the irradiation direction of the laser beam L _1, L ₂ by the acousto-optic deflector 13 _1, 13 _2, can be scanned in the display space atmosphere bright points described above, this The stereoscopic image Q can be displayed by. Further, the brightness of the bright spot can be adjusted by appropriately chopping the laser beams L ₁ and L ₂ using the choppers 14 ₁ and 14 ₂ to adjust the light intensity.

The laser light sources 12 ₁ and 1 as described above are used.
Two sets of 2 ₂ are installed so that the laser light emitted from each set of laser light sources intersects at each adjacent position, and each set is such that the frequency of the modulated wave ML at each intersection becomes the three primary colors of light. It is also possible to realize a stereoscopic image display device capable of color display by setting the frequency of the laser light.

The deflection control is performed by the acousto-optic deflection element (A
OD), and the brightness control is not limited to the chopper. For these, appropriate means can be adopted. The substance that scatters light may be fine particles or gas that emits visible light fluorescence.

[0037]

As is apparent from the above description, according to the method and apparatus of the present invention, the display space atmosphere is irradiated with electromagnetic waves from at least two directions to generate bright spots at the intersections thereof. By controlling the irradiation direction of each electromagnetic wave, the bright spots are scanned in the display space atmosphere to display a stereoscopic image, so a huge stereoscopic image can be displayed and a wide viewing angle due to its configuration. You can also get

[Brief description of drawings]

FIG. 1 is a diagram showing a schematic configuration of a stereoscopic image display device according to a first embodiment.

FIG. 2 is a diagram for explaining the operation of the apparatus of the embodiment.

FIG. 3 is a diagram for explaining a selection operation of a pair of parabona antennas.

FIG. 4 is a diagram showing a schematic configuration of a stereoscopic image display device according to a second example.

FIG. 5 is a diagram showing a schematic configuration of a stereoscopic image display device according to a third example.

FIG. 6 is a diagram for explaining the operation of the device of the third embodiment.

[Explanation of symbols]

1 ... display structure 2 _YZ, 2 _XY ... parabolic antenna group 3a, 3b ... switching circuit 4a, 4b ... microwave oscillation circuit 5 ... scanning control circuit M _1, M ₂ ... microwave P ... Mairoku wave intersection (bright Point) Q ... 3D image

Claims (2)

[Claims] 1. By radiating electromagnetic waves having directivity from at least two directions into an appropriate display space atmosphere,
A stereoscopic image display characterized in that a bright spot is generated at an intersection of the electromagnetic waves and the irradiation direction of each electromagnetic wave is changed to scan the bright spot in the display space atmosphere to display a stereoscopic image. Method. 2. A display structure covered with a translucent member, in which an appropriate display space atmosphere is formed, and an electromagnetic wave having directivity from at least two directions to the inside of the display structure. The bright spots are displayed by controlling the irradiation direction of the electromagnetic waves emitted from the electromagnetic wave irradiation means and the electromagnetic wave irradiation means for generating bright points at intersections of the electromagnetic waves in the display space atmosphere. A stereoscopic image display device, comprising: a scanning control unit that displays a stereoscopic image by scanning in a space atmosphere.