KR102019393B1 - Polyhedron image projection apparatus - Google Patents

Abstract

The multi-spatial image projection apparatus capable of observing holographic images from a plurality of sides is provided in a polygonal columnar housing having a plurality of side surfaces, a top surface and a bottom surface, installed inside the housing, and a plurality of displays corresponding to the plurality of side surfaces and a plurality of side surfaces. And a plurality of prismatic arrays formed to refract light rays of the holographic images output from each of the plurality of displays to form a stereoscopic image inside the housing, wherein each of the plurality of displays is inclined at a predetermined angle with a corresponding prism array. Can be.

Description

Multi-sided spatial image projection apparatus {POLYHEDRON IMAGE PROJECTION APPARATUS}

The present invention relates to a multi-sided spatial image projection apparatus.

3D stereoscopic image display technology is a technique of reconstructing a 3D image by adding constant depth information to a 2D image.

The 3D stereoscopic image display technology provides a 3D image using a principle of binocular disparity of a person. According to the implementation method of the 3D stereoscopic image, since the image reflected to the left eye and the right eye are different from each other, it is possible to provide a stereoscopic feeling and a sense of protrusion through the perception of parallax by both observers' eyes.

There are two methods of separating the left and right images using binocular disparity. The glasses may include anaglyph, polarized glasses, shutter glasses, or the like, and may include a lenticular, a parallax barrier, an optical plate, and the like. . Here, the polarizing glasses method and the shutter glasses method of the glasses method is the oldest three-dimensional display method is widely used in stereoscopic movies, 3D TV and the like. However, polarizing glasses and shutter glasses have a problem of increasing the discomfort and eye fatigue to wear a special glasses for stereoscopic images. The lenticular method and the parallax barrier method among the autostereoscopic methods have low luminance and low resolution images, and the viewing point of the viewer is fixed and has a disadvantage of causing headache or dizziness when the viewer continuously observes.

On the other hand, there are holographic and volumetric three-dimensional display methods in the full stereoscopic method. Such a full stereoscopic method realizes only a stationary stereoscopic image through an expensive laser and a precise optical device, and does not provide a real-time high definition stereoscopic image.

Recently, methods for implementing real-time stereoscopic images at low cost using half mirrors, concave mirrors, Fresnel lenses, and prism arrays have been proposed. However, the method using the half mirror has a problem in that the image is formed in a virtual image, the physical size of the system is large, and the method using the concave mirror and the Fresnel lens has a problem of high manufacturing cost and a narrow viewing angle.

Recently, a method of forming a stereoscopic image in a virtual image using a prism array has been proposed. In this method, a prism array is installed at the top of the front of the display panel, and a stereoscopic image is projected to the rear of the prism array.

Meanwhile, in order for 3D stereoscopic image display technology to be used in advertisements, exhibitions, etc., it is necessary for an observer to observe stereoscopic images in various directions.

However, when the stereoscopic image is viewed in a multi-directional manner using a conventional half mirror, there is a problem in that the system is enlarged compared to the image size. FIG. 1 is a diagram illustrating an apparatus in which a conventional spatial image projection apparatus using a half mirror reflects an image through a half mirror to form a virtual image in space. The spatial image projection apparatus using the half mirror installs the half mirror at an angle of 45 degrees, and reflects the image output from the display installed below or above the half mirror to project the image in space. When only the image of the cross section is to be expressed, as shown by reference numeral 100, the image may be projected using the entire area of the half mirror. However, when the surface of the image to be projected becomes large, the installation angle of the half mirror should be narrowed, and the half mirror structure should be configured in the form of a polyhedron.

When the image of the four sides is to be represented, as shown by reference numeral 110, an image output from the display may be projected through a half mirror having a quadrangular pyramid shape. At this time, since the projected image is seen through the half mirror, the image is projected inside the square mirror shaped half mirror. However, since the height of the projection space decreases toward the outside, the image is actually projected in the intermediate space of the half mirror.

On the other hand, when implemented in a manner using a prism array, a problem that the three-dimensional image is output upside down from the side or rear of the system occurs. In order to solve this problem, a high-speed display device or the like is required, but there is a difficulty in practical use.

In this regard, Patent Document 10-1365449 discloses a stereoscopic image display apparatus for displaying a stereoscopic image.

It is an object of the present invention to provide a multi-spatial image projection apparatus capable of observing holographic images from multiple planes. Specifically, a plurality of displays corresponding to a plurality of side surfaces are disposed in the multi-sided spatial image projection apparatus, and light rays of the holographic images output from each display are refracted through an array of prisms installed in correspondence with each display to provide a three-dimensional image in a multiple plane. I would like to. However, the technical problem to be achieved by the present embodiment is not limited to the technical problems as described above, and other technical problems may exist.

As a technical means for achieving the above-described technical problem, the multi-spatial image projection apparatus capable of observing the hologram image in the plane according to the first aspect of the present invention comprises: a polygonal columnar housing having a plurality of side surfaces and an upper surface and a lower surface; A plurality of displays installed inside the housing and corresponding to the plurality of side surfaces; And a plurality of prisms formed on the plurality of side surfaces, the plurality of prisms arranged to refract light rays of the holographic images output from each of the plurality of displays to form a stereoscopic image inside the housing, each of the plurality of displays corresponding to a prism. It may be inclined at an angle with the array.

According to the second aspect of the present invention, a multi-sided spatial image projection apparatus capable of observing a hologram image may include: a polygonal columnar housing having a plurality of side surfaces, an upper surface, and a lower surface; And a plurality of hologram modules configured to provide stereoscopic images through the plurality of side surfaces, wherein each of the plurality of hologram modules includes a display and a prism array, and the display may be inclined at a predetermined angle with the prism array. have.

The above-mentioned means for solving the problems are merely exemplary, and should not be construed to limit the present invention. In addition to the exemplary embodiments described above, there may be additional embodiments described in the drawings and detailed description of the invention.

According to any one of the above-described problem solving means of the present invention, it is possible to provide a multi-spatial image projection apparatus capable of observing a hologram image from a multi-faceted. Specifically, a plurality of displays corresponding to a plurality of side surfaces are disposed in the multi-sided spatial image projection apparatus, and light rays of the holographic images output from each display are refracted through an array of prisms installed in correspondence with each display to provide a three-dimensional image in a multiple plane. can do.

1 is a view for explaining a conventional spatial image projection apparatus using a half mirror.
2 is a view for explaining the principle of the spatial image projection of the prism array.
3 is a diagram for describing a multi-sided spatial image projection apparatus according to an exemplary embodiment of the present invention.
4A to 4B illustrate a plan view of a multi-sided spatial image projector and an arrangement angle of a display according to an embodiment of the present invention.
5A to 5B are diagrams illustrating a plan view and a display angle of a multi-spatial spatial projection apparatus according to another exemplary embodiment of the present invention.
6A to 6D are diagrams illustrating a structure of a hologram module, a light path of a hologram image, and a stereoscopic image of a multi-spatial image projection apparatus according to an embodiment of the present invention.
7A to 7C are diagrams for describing a plurality of barriers used in the gamut control filter according to an exemplary embodiment of the present invention.
8 is a diagram for describing a method of removing a dual phase of a hologram module using polarization characteristics according to an exemplary embodiment of the present invention.
9A to 9B are views for explaining a configuration method of a conventional large-screen spatial image projection apparatus and a large-screen spatial image projection apparatus of the present invention.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

Throughout the specification, when a part is "connected" to another part, this includes not only "directly connected" but also "electrically connected" with another element in between. . In addition, when a part is said to "include" a certain component, which means that it may further include other components, except to exclude other components unless otherwise stated.

In the present specification, the term 'unit' includes a unit realized by hardware, a unit realized by software, and a unit realized by both. In addition, one unit may be realized using two or more pieces of hardware, and two or more units may be realized by one piece of hardware.

Hereinafter, with reference to the accompanying configuration diagram or processing flow chart, it will be described in detail for the practice of the present invention.

2 is a view for explaining the principle of the spatial image projection of the prism array.

Referring to FIG. 2, the first light ray 204 incident on the prism array 202 in the first direction among the light rays of the hologram image output from the display panel 200 is refracted by the prism array 202. At this time, the observer 206 may observe the stereoscopic image 208 projected as a virtual image behind the prism array 202.

Meanwhile, the light ray 210 of the background image incident on the prism array 202 in the second direction from the real space is refracted by the prism array 202 and directed to the observer 206.

In other words, the first light ray 204 output from the display panel 200 is refracted through the first facet 212 of the prism, and the background light 210 is refracted through the second facet 214 of the prism. The stereoscopic image 208 and the actual background image are projected together.

However, the conventional prism array-based spatial image projection method using the above principle has a problem in that a double image occurs due to the use of a symmetric prism. In order to prevent such a double phase problem, the prism array and the display need to have a sufficient distance or limit the viewing angle, which causes a problem that the size of the system is increased.

Hereinafter, a method of configuring a spatial image projection apparatus if there is no problem of dual image will be described.

3 is a diagram for describing a multi-sided spatial image projection apparatus 30 according to an embodiment of the present invention.

Referring to FIG. 3, the multi-spatial image projection apparatus 30 may include a housing 300, a plurality of displays 310, and a plurality of prism arrays 320. However, since the multi-sided spatial image projection apparatus 30 of FIG. 3 is only an embodiment of the present invention, the present invention is not limitedly interpreted through FIG. 3 and is different from FIG. 3 according to various embodiments of the present invention. It may be configured.

The housing 300 may be, for example, formed in a polygonal column shape composed of a plurality of side surfaces, a top surface, and a bottom surface. A plurality of displays 310 for outputting a hologram image may be installed in the housing 300, and a plurality of prism arrays 320 for forming a stereoscopic image may be installed on the plurality of side surfaces of the housing 300. .

Each prism array 320 installed in correspondence with each of the plurality of side surfaces of the housing 300 and each display 310 corresponding to each prism array 320 may be included in any one of the hologram modules. For example, the first hologram module includes a first prism array and a first display corresponding to the first side of the housing 300, and the second hologram module comprises a second corresponding to the second side of the housing 300. It may include a prism array and a second display.

The plurality of displays 310 may be installed to correspond to each of the plurality of side surfaces of the housing 300, and may be installed at a predetermined angle with respect to each side. In detail, each of the plurality of displays 310 may be installed inside the housing 300 in a state inclined at a predetermined angle with each prism array corresponding to each display.

For example, the plurality of displays 310 may include one of a liquid crystal display (LCD) display, an organic light emitting diode (OLED) display, and a quantum dot display capable of outputting two-dimensional images. . As another example, the plurality of displays 310 may include one of a 3D display including a Parallax Barrier, a Lenticular Lens, and a Prism Array capable of outputting a 3D image. Can be. As another example, the plurality of displays 310 may include an integrated image display capable of outputting a 3D volume image, a hologram display, a rotating screen based volume display, a multilayer structure based volume display, and the like. As another example, the plurality of displays 310 may include a viewing area adjusting element capable of adjusting viewing area. Here, the viewing control element may include a viewing filter using a parallax barrier, a diffractive optical element (DOE), or a hologram optical element (HOE). In addition, the viewing area of the display may be adjusted by adding a viewing area adjusting optical system to the rear of each display 310.

Each of the plurality of prism arrays 320 may be formed at each side of the housing 300 corresponding to each of the plurality of displays 310. The plurality of prismatic arrays 320 may form a stereoscopic image corresponding to the holographic image by refracting light rays of the holographic image output from each of the plurality of displays 310.

The multi-sided spatial image projection apparatus 30 may be manufactured more compact by varying the number of side surfaces by adjusting the angle between the plurality of prism arrays 320.

4A to 5B, a method of arranging a plurality of displays and a plurality of prism arrays in the multi-faceted multi-spatial image projector 30 will be described.

4A through 5B illustrate a multi-sided spatial image projection apparatus 30 having five surfaces, but the number of planes of the multi-sided spatial image projection apparatus 30 is not limited thereto. For example, the spatial image projection apparatus 30 may be configured to have more or fewer sides than five sides.

4A is a diagram illustrating a cross-section of the multi-sided spatial image projection apparatus 30 having five surfaces according to an embodiment of the present invention.

Referring to FIG. 4A, each of the displays 311 to 319 may be arranged with a predetermined rule so as not to be engaged with each other. For example, the first display 311 may include the first display 311 and the first display so that a line connecting the one end 331 and the other end 333 of the first display 311 does not pass through the second display 313. 2 displays 313 may be disposed. In addition, the third display 315, the fourth display 317, and the fifth display 319 may also be disposed in the same manner.

For example, an angle formed by each display 311 to 319 and each prism array 321 to 329 may be configured as shown in FIG. 4B. Referring to FIG. 4B, a first angle formed by a line connecting one end 331 of the first display 311 and one vertex 335 of the first prism array 321 to the surface of the first prism array 321. A second angle 410 is formed by a line connecting the other end 333 of the first display 311 and the other vertex 337 of the first prism array 321 to the surface of the first prism array 321. It can be set equal to).

5A is a diagram illustrating a cross-section of the multi-sided spatial image projection apparatus 30 having five surfaces according to another embodiment of the present invention. Referring to FIG. 5A, the plurality of prismatic arrays 321 to 329 includes five prismatic arrays forming five surfaces of the housing, and the plurality of displays 311 to 319 include five corresponding to each of the five prism arrays. It may include a display.

The plurality of displays may include a first display 311, a second display 313 neighboring the first display 311, a third display 315 neighboring the second display 313, and a third display 315. The neighboring fourth display 317, the fourth display 317, and the neighboring fifth display 319 may be included.

The plurality of prism arrays refracting the light rays of the holographic image output from the first display 311 to refract the light rays of the holographic image output from the first prism array 321 and the second display 313 to form a stereoscopic image. The second prism array 323 forming the stereoscopic image, the third prism array 325 and the fourth display 317 outputting the refraction of the hologram image output from the third display 315 to form a stereoscopic image. A fourth prism array 327 that refracts light rays of the hologram image, and forms a stereoscopic image, and a fifth prism array 329 that refracts light rays of the hologram image output from the fifth display 319 to form a stereoscopic image. It may include.

Here, each of the displays 311 to 319 may be disposed to be engaged with each other to minimize the internal space. For example, the first display 311 has a first display 311 and a second such that a line connecting one end 331 and the other end 333 of the first display 311 passes through the second display 313. Display 313 may be disposed. In addition, the third display 315, the fourth display 317, and the fifth display 319 may also be disposed in the same manner.

For example, an angle formed by each display 311 to 319 and each prism array 321 to 329 may be configured as shown in FIG. 5B. Referring to FIG. 5B, a first angle formed by a line connecting one end 331 of the first display 311 and one vertex 335 of the first prism array 321 to the surface of the first prism array 321. A second angle 510 is formed by the line connecting the other end 333 of the first display 311 and the other vertex 337 of the first prism array 321 to the surface of the first prism array 321. It can be set smaller than).

As described above, when the asymmetric hologram module having the first angle 500 and the second angle 510 is different from each other, a more compact multi-spatial image projection apparatus 30 may be manufactured.

As described above, in order to form a compact and large stereoscopic image through a plurality of hologram modules, it is necessary to set the first angle 500 small. However, when the first angle 500 is set below a predetermined angle, a problem occurs that a double phase occurs.

For example, referring to FIG. 6A, the first light ray 620 of the hologram image output from the first display 311 in the front direction of the first display 311 is directed to the entire region of the first prism array 321. Toward the first facet of the first prism array 321 to form a stereoscopic image.

At the same time, the second light beam 630 output from the first display 311 in a direction different from that of the first light beam 620 is directed toward one side of the first prism array 321 and at the second facet of the first prism array 321. It is refracted to form a stereoscopic image.

As a result, as shown in FIG. 6B, a dual image is generated according to each stereoscopic image refracted by the first and second facets of the first prism array 321. The observer observes that in addition to the stereoscopic image formed at the center of the multi-sided spatial image projection apparatus 30, the dual image formed by being compressed in the horizontal direction is formed on the right side.

As described above, it is necessary to solve the problem of double image occurring when the spatial image projection apparatus 30 is more compact.

As a method for removing the double phase, setting the first angle 500 large may be considered. However, in this case, a problem arises in that the width of the stereoscopic image is narrowed and the viewing area is reduced.

In addition, when the first angle 500 increases, the second angle 510 also becomes large, which makes it difficult to construct the compact multi-spatial image projection apparatus 30 using the plurality of hologram modules.

In order to solve the above problem, a viewing filter may be additionally installed in each of the plurality of displays. For example, a viewing filter may be attached to the front of each of the plurality of displays.

Here, the gamut adjustment filter is a filter that blocks light rays output at an angle within a predetermined range of light rays of the holographic image output from the display.

For example, referring to FIG. 6C, the first light ray 620 of the hologram image output from the first display 311 in the front direction of the first display 311 passes through the viewing filter and the first prism array. Although refracted by the first facet of 321 to form a stereoscopic image, the second light ray 630 output in a direction different from the first light ray 620 is blocked by the viewing filter. At this time, the observer can observe only the stereoscopic image refracted by the first facet from which the dual phase is removed, as shown in FIG. 6D.

For a moment, the viewing filter will be described with reference to FIGS. 7A to 7C.

Referring to FIG. 7A, the viewing filter may include a top surface 701 and a bottom surface 703, and may include a plurality of barriers 711 extending in a direction crossing the top surface 701 and the bottom surface 703. .

The plurality of barriers 711 protrude from the lower surface 703 toward the upper surface 701 in a vertical direction, and may be disposed at intervals along the longitudinal direction when the viewer views the multi-sided spatial projection imaging apparatus 30. .

When the height 705 of the plurality of barriers 711 is P _h and the arrangement interval 707 between the plurality of barriers 711 is P _w , the angle of passage of the light rays of the hologram image that can pass through the viewing filter can be passed. 709 is the same as Equation 1.

[Equation 1]

Referring to FIG. 7B, the viewing filter may adjust the angle at which the light passes and the angle at which the light is blocked by changing at least one of the heights and the arrangement intervals 707 of the plurality of barriers 711. For example, reference numeral 713 denotes a first arrangement form of the plurality of barriers 711, and allows a stereoscopic image to be viewed only in a specific direction by passing only a light beam within a specific angle of the light beam.

In addition, reference numeral 715 denotes a second arrangement of the plurality of barriers 711. By setting the height of the barrier 711 relatively high, the angle of passage of the light beams can be narrowly adjusted.

In addition, reference numeral 717 denotes a third arrangement of the plurality of barriers 711. By setting the height of the barrier 711 low, the angle of passage of the light beams can be adjusted widely. In addition, as shown by reference numerals 719 and 721, the passage angle of the light beams can be adjusted to be wider or narrower by setting the intervals of arrangement of the plurality of barriers 711 to be wider or narrower.

)로 기울어진 시역 조절 필터를 사용할 수 있다. Referring to FIG. 7C, the left and right viewing angles of the hologram module may vary depending on the characteristics of the display and prism array angle, the prism vertex angle of the prism array, and the like. In order to solve this problem, the plurality of barriers 711 may have a predetermined angle (

You can use a tilt filter with).

)로 기울어져 돌출되어 있으며, 관찰자가 다면 공간 투영 영상 장치(30)를 바라볼 때 종방향을 따라 간격을 두고 배치될 수 있다. Here, the plurality of barriers 711 is a predetermined angle (

Protruding at an angle of), the viewer may be disposed at intervals along the longitudinal direction when the viewer views the multi-dimensional spatial projection imaging apparatus 30.

Since the plurality of barriers 711 are disposed in an inclined state, only light rays substantially parallel to each barrier 711 may pass through the viewing filter.

라고 하면, 시역 조절 필터를 통과하는 광선의 통과 각도는 수학식 2와 같다. The arrangement interval 707 of the plurality of barriers 711 is P _w , the height 705 is P _h , and the inclined angle 713 of each barrier 711 is

In this case, the passing angle of the light ray passing through the viewing filter is expressed by Equation (2).

[Equation 2]

Therefore, the viewing filter adjusts the height 705 of the plurality of barriers 711, the arrangement interval 707, and the angle (degree of inclination of the barrier 711, 713) to adjust the output direction and the passing angle of the light beam. do.

3, as another method of removing the dual image of the stereoscopic image, a first type of polarizing film is attached to each of the plurality of displays 310 of the multi-spatial image projector 30, and each prism array 230 is provided. The dual phase of the stereoscopic image can be removed by attaching the first kind of polarizing film to the first facet of) and attaching the second kind of polarizing film to the second facet. Under the present circumstances, a 2nd type polarizing film is a film which has the polarization characteristic perpendicular | vertical to a 1st type polarizing film.

Referring to FIG. 8 for a while, a first type polarizing film 800 is attached to a screen of the first display 311, and faces a first display 311 among a plurality of facets of the first prism array 321. The first type of polarizing film 800 is attached to the first facet 810 as viewed, and the first type of polarizing film 800 is orthogonal to each other on the second facet 820 opposite to the first facet 810. The second type of polarizing film 850 having a direction may be attached.

Here, when the hologram image is output from the first display 311, the first light ray 830 of the hologram image output from the first display 311 is the first type of polarizing film attached to the first display 311. While passing through the (800) it will have a polarization characteristic in a specific direction. The first light ray 830 that reaches the first prism array 321 is refracted by the first facet 810 to pass through the first facet 810. At this time, since the moving direction of the first light ray 830 is in the same direction as the first kind of polarizing film 800 attached to the first facet 810, the first light ray 830 is directed to the first facet 810. It passes through the polarized film 800 of the attached first type as it is, and forms a stereoscopic image corresponding to the first ray 830.

However, the second light ray 840 directed to the second facet 820 causing the double phase problem among the plurality of light rays output from the first display 311 is the second type of polarizing film 850 attached to the second facet 820. ) Are blocked and cannot pass because they have polarization characteristics orthogonal to each other.

9A to 9B are diagrams for describing a method of configuring a spatial image projector according to still another exemplary embodiment of the present invention.

Referring to FIG. 9A, a large-area spatial image projection apparatus is manufactured by using a large prism array 321 and a large display 311. Such a manufacturing method may include difficulties in manufacturing the large prism array 321 and an increase in unit cost, a unit price increase due to the use of the large display 311, and a decrease in image quality due to an increase in the distance between the large prism array 321 and the large display 311. It brought a problem, and there was a problem that the size of the entire spatial image projection apparatus increases.

In order to solve this problem, a plurality of relatively small displays corresponding to each prism array of the multi-sided spatial image projector 30 may be arranged.

Referring to FIG. 9B, when the multi-spatial image projector 30 is configured to horizontally connect a plurality of displays 910, 920, and 930 corresponding to the prism array 321, an image having the same size as that of FIG. 9A. While it can be expressed, the deterioration of the image quality of the three-dimensional image projected on the space can be prevented.

The foregoing description of the present invention is intended for illustration, and it will be understood by those skilled in the art that the present invention may be easily modified in other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

The scope of the present invention is shown by the following claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention. .

30: multi-space spatial image projection device
300: housing of polygonal column shape
310: multiple displays
320: multiple prism arrays

Claims (20)

In the multi-spatial image projection apparatus capable of observing hologram images in the plane,
A polygonal columnar housing having a plurality of side surfaces, a top surface and a bottom surface;
A plurality of displays installed inside the housing and corresponding to the plurality of side surfaces; And
A plurality of prismatic arrays formed on the plurality of side surfaces and configured to refract light rays of the holographic images output from each of the plurality of displays to form a stereoscopic image inside the housing,
Each of the plurality of displays is tilted at a predetermined angle with a corresponding prism array,
And each of the plurality of displays includes a field-of-view adjustment filter that blocks light rays output at an angle within a predetermined range of light rays of the holographic image.
The method of claim 1,
The plurality of displays comprises a first display and a second display neighboring the first display,
And a line connecting one end and the other end of the first display to the first display and the second display to pass through the second display.
The method of claim 1,
The plurality of displays comprises a first display and a second display neighboring the first display,
And a line connecting one end of the first display to the other end of the first display is disposed so that the first display and the second display do not pass through the second display.
The method of claim 1,
The plurality of displays comprises a first display,
The plurality of prism arrays include a first prism array that forms a stereoscopic image by refracting light rays of the holographic image output from the first display.
A line connecting one end of the first display and one vertex of the first prism array connects a first angle formed with the surface of the first prism array, the other end of the first display, and the other vertex of the first prism array. And a second angle formed by a line to the surface of the first prism array is the same.
The method of claim 1,
The plurality of displays comprises a first display,
The plurality of prism arrays include a first prism array that forms a stereoscopic image by refracting light rays of the holographic image output from the first display.
A first angle formed by a line connecting one end of the first display and one vertex of the first prism array to the surface of the first prism array connects the other end of the first display and the other vertex of the first prism array. And a line larger than a second angle formed with the surface of the first prism array.
The method of claim 1,
The plurality of side surfaces are five sides,
The plurality of prismatic arrays includes five prismatic arrays forming five surfaces of the housing,
And the plurality of displays comprises five displays corresponding to the five prismatic arrays.
delete The method of claim 1,
The viewing filter includes a top surface and a bottom surface, the plurality of barriers extending in a direction crossing the top and bottom surfaces.
That is, comprising a multi-sided spatial image projection apparatus.
The method of claim 8,
And the viewing area adjustment filter is configured to control the angle of the predetermined range by changing at least one of heights and placement intervals of the plurality of barriers.
The method of claim 1,
Wherein each of the plurality of displays comprises a first type of polarizing film.
The method of claim 10,
In each of the plurality of prismatic arrays, the first facet facing the corresponding display comprises the first type of polarizing film and the second facet has a polarization characteristic perpendicular to the first type of polarizing film. A multi-faceted spatial image projection device, comprising two kinds of polarizing films.
In the multi-spatial image projection apparatus capable of observing hologram images in the plane,
A polygonal columnar housing having a plurality of side surfaces, a top surface and a bottom surface; And
It includes a plurality of hologram module for providing a stereoscopic image through the plurality of sides,
Each of the plurality of hologram modules comprises a display and a prism array,
The display is tilted at an angle with the prism array,
The display apparatus of claim 1, further comprising a viewing filter for blocking light incident at an angle within a predetermined range of light rays of the output hologram image.
The method of claim 12,
And a line connecting one end of the display to the other end is arranged such that the display passes through a neighboring display.
The method of claim 12,
And the display is arranged such that a line connecting one end and the other end of the display does not pass through a neighboring display.
The method of claim 12,
A first angle between a line connecting one end of the display and one vertex of the prism array to a surface of the prism array, and a line connecting the other end of the display and the other vertex of the prism array to a surface of the prism array. And the second angle is the same.
The method of claim 12,
A first angle of a line connecting one end of the display and one vertex of the prism array to the surface of the prism array is a line connecting the other end of the display and the other vertex of the prism array to the surface of the prism array. And greater than a second angle.
The method of claim 12,
The plurality of side surfaces are five sides,
And the plurality of hologram modules include five hologram modules corresponding to five surfaces of the housing, respectively.
delete The method of claim 12,
And said display comprises a first type of polarizing film.
The method of claim 19,
The first facet facing the display of the prism array includes the first type of polarizing film, and the second facet includes the second type of polarizing film having polarization characteristics perpendicular to the first type of polarizing film. Multi-spatial image projection apparatus.

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