KR20180065587A - Three-dimensional image projection apparatus - Google Patents

Abstract

A space projection image apparatus includes a display panel for outputting a hologram image, a prism array provided in front of the display panel and forming a stereoscopic image by refracting a light beam of the hologram image, and a visual field adjustment filter arranged between the display panel and the prism array and blocking the light beam which is incident at an angle of a preset range among the light beams of the hologram image outputted from the display panel. Accordingly, the present invention can solve an overlapping phenomenon of the stereoscopic image.

Description

{THREE-DIMENSIONAL IMAGE PROJECTION APPARATUS}

The present invention relates to a spatial projection imaging apparatus.

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

Such a three-dimensional image display technology provides a three-dimensional image using the binocular disparity principle of a person. There are two methods of separating left and right images using binocular disparity. The spectacle method includes an anaglyph method, a polarized spectacle method, a shutter spectacle method, and the non-spectacle method may include a lenticular method, a parallax barrier method, an optical plate method, and the like . Here, the polarizing glasses system and the shutter glasses system among the glasses system are the oldest three-dimensional display systems and widely used for stereoscopic movies, 3D TVs, and the like. However, polarized glasses and shutter glasses have the disadvantages of wearing special glasses for stereoscopic images and increasing eye fatigue. Among lenticular glasses, the lenticular and parallax barriers have a disadvantage in that the observation points of viewers are fixed with low luminance and low resolution images, and headaches or dizziness are caused when the viewer continuously observes them.

On the other hand, there are hologram and volumetric three-dimensional display systems as the complete stereoscopic system. This full stereoscopic system realizes stereoscopic stereoscopic images only through expensive laser and precision optical system, and does not provide real time high quality stereoscopic images.

In recent years, methods for implementing a real-time stereoscopic image at a low cost using a half mirror, a concave mirror, a Fresnel lens, a prism array, or the like have been proposed. However, the method using the half mirror has a problem that the image is virtual, the physical size of the system is large, and the method using the concave mirror and the Fresnel lens has a problem that the manufacturing cost is high and the viewing angle is narrow.

As a solution to this problem, a method of forming a stereoscopic image using a prism array to give a hologram effect has recently been proposed. In a conventional spatial imaging apparatus using a prism array, a symmetric prism array is used because of difficulty in manufacturing a prism array and manufacturing cost.

When such a symmetrical prism array is used, there is a problem in that a stereoscopic image overlaps a certain region as described later. In addition, there is a problem that the size and the viewing area of the stereoscopic image should be limited.

As a solution to this problem, there is a method of using a prism array having a small vertex angle, but there is a problem that unnecessary noise images are generated due to narrowed viewing range and total reflection.

In addition, although there is a method of increasing the distance between the display panel and the prism array, there is a problem that the system becomes large and the image quality of the image deteriorates.

In this regard, Korean Patent Laid-Open Publication No. 2014-0144617 discloses a display unit for displaying an image, in which a plurality of prisms are connected to form one surface of each prism, and a user can recognize an image through a prism And a prism array for refracting light corresponding to the image to a predetermined position in which the image is projected.

A field-of-view adjusting filter is provided between the display panel and the prism array so as to shield rays of light incident on the hologram image outputted from the display panel at an angle within a predetermined range through the field-adjusting filter. It is to be understood, however, that the technical scope of the present invention is not limited to the above-described technical problems, and other technical problems may exist.

According to a first aspect of the present invention, there is provided a spatial projection imaging apparatus comprising: a display panel for outputting a hologram image; A prism array disposed at a front side of the display panel to refract light rays of the hologram image to form a stereoscopic image; And a field-of-view adjusting filter disposed between the display panel and the prism array for blocking rays of light incident on the hologram image outputted from the display panel at a predetermined angle.

In one example, the field-of-view adjusting filter may be installed at an angle between the display panel and the prism array at an angle.

In one example, the field-of-view adjustment filter may be configured such that the predetermined angle is changeable so that the angle of the predetermined range can be controlled.

In one example, the view adjustment filter includes a base; And a plurality of barriers extending transversely of the base on the base. The plurality of barriers protrude perpendicularly to the base and may be spaced apart along the longitudinal direction of the base.

In one example, the field-of-view adjusting filter may be configured to control the angle of the predetermined range by changing at least one of height and arrangement interval of the plurality of barriers.

A spatial projection imaging apparatus according to a second aspect of the present invention includes: a display panel for outputting a hologram image; A prism array disposed at a predetermined distance in front of the display panel and refracting a light ray of the hologram image to form a stereoscopic image; And a field-of-view adjusting filter attached to the front of the display panel to block rays of light incident on the hologram image output from the display panel at a predetermined angle.

A spatial projection imaging apparatus according to a third aspect of the present invention includes a display panel; A prism array disposed in front of the display panel; A field-of-view adjusting filter disposed between the display panel and the prism array; And a control unit for controlling a blocking angle of the field-of-view adjusting filter to block rays of light incident on the hologram image outputted from the display panel at an angle of a predetermined range.

The above-described task solution is merely exemplary and should not be construed as limiting the present invention. In addition to the exemplary embodiments described above, there may be additional embodiments described in the drawings and the detailed description of the invention.

According to any one of the above-mentioned objects, there is provided a field-of-view adjusting filter between a display panel and a prism array, wherein a light ray incident at an angle of a predetermined range from a light ray of a hologram image output from a display panel, . This solves the problem of superimposing the stereoscopic images formed by refracting the rays of the hologram image, and a larger stereoscopic image can be provided in a wide vertical viewing area.

FIGS. 1A and 1B are views for explaining characteristics of a stereoscopic image in a conventional spatial image projection apparatus.
2A and 2B are views of a spatial projection imaging apparatus using a field-of-view adjustment filter, according to an embodiment of the present invention.
3A and 3B are views for explaining a view adjustment filter according to an embodiment of the present invention.
4A and 4B are views of a spatial projection imaging apparatus using a field-of-view filter according to another embodiment of the present invention.
5 is a view for explaining a view adjustment filter according to another embodiment of the present invention.
6A and 6B are views of a spatial projection imaging apparatus using a field-of-view adjusting filter according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when a part is referred to as being "connected" to another part, it includes not only "directly connected" but also "electrically connected" with another part in between . Also, when an element is referred to as "comprising ", it means that it can include other elements as well, without departing from the other elements unless specifically stated otherwise.

In this specification, the term " part " includes a unit realized by hardware, a unit realized by software, and a unit realized by using both. Further, one unit may be implemented using two or more hardware, or two or more units may be implemented by one hardware.

In this specification, some of the operations or functions described as being performed by the terminal or the device may be performed in the server connected to the terminal or the device instead. Similarly, some of the operations or functions described as being performed by the server may also be performed on a terminal or device connected to the server.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings.

FIGS. 1A and 1B are views for explaining characteristics of a stereoscopic image in a conventional spatial image projection apparatus.

Referring to FIG. 1A, a conventional spatial image projection apparatus may include a display panel 101 and a prism array 103. The display panel 101 receives the d _s (t) from the prism array 103 As shown in FIG.

)를 가지고 프리즘 어레이(103)의 상부로 향하는 제 1 광선은 프리즘 어레이(103)에서 굴절되어 관찰자의 시야 방향으로 굴절된다. 또한, 디스플레이 패널(101)에서 출력된 홀로그램 영상의 복수의 광선 중 입사 각도(

)를 가지고 프리즘 어레이(103)의 하부로 향하는 제 2 광선도 프리즘 어레이(103)에서 굴절되어 관찰자의 시야 방향으로 굴절된다.The display panel 101 can output a hologram image. Of the plurality of light beams of the hologram image outputted from the display panel 101,

) Of the prism array 103 is refracted in the prism array 103 and refracted in the visual field direction of the observer. Of the plurality of light beams of the hologram image outputted from the display panel 101,

And refracted in the second light ray prism array 103 which is directed to the lower portion of the prism array 103 and refracted in the visual field direction of the observer.

The prism array 103 includes a plurality of prisms 111 arranged side by side. Each of the plurality of prisms 111 has an incident surface 113 as an optical plane on which a light beam is incident, a first facet 115 as an optical plane for refracting the first light ray of the hologram image incident in the first direction, And a second facet 117 that is an optical plane that refracts a second light ray of a hologram image incident in a second direction on the display panel 101 in a different direction than one light ray. The refracted first ray and the refracted second ray proceed parallel to each other in the visual field direction of the observer.

When a first ray of light in a first direction among a plurality of rays of a hologram image is incident on a first facet 115 of the prism 111 and refracted, a first stereoscopic image 107 is arranged behind the prism array 103 . A second light beam incident in the second direction is incident on the second facet 117 of the prism array 103 and is refracted to form a second stereoscopic image 105 behind the prism array 103.

In this case, the first light beam incident from the lower portion of the display panel 101 and the second light beam incident from the upper portion are refracted toward the prism array 103 in the substantially middle region 121 of the prism array 103.

Accordingly, in the substantially middle region 121 of the prism array 103 in which both the first ray and the second ray are incident, the first stereoscopic image 107 for the refracted first ray and the second stereoscopic image There is a problem that a noise image is generated in which a certain portion 109 of the first stereoscopic image 107 and a certain portion 109 of the second stereoscopic image 105 are overlapped with each other .

An image of a part of the display panel 101 (upper part or lower part) may be removed to solve the problem of generating a noise image.

1B, the image of the upper portion 119 of the display panel 101, which outputs light refracted in the substantially middle region 121 of the prism array 103 in FIG. 1A, is removed from the display panel 101, It is possible to solve the problem that the image occurs.

However, this method has a problem that the size of the stereoscopic image is reduced.

On the other hand, there is a method of sufficiently widening the interval between the display panel 101 and the prism array 103. Accordingly, the first stereoscopic image 107 and the second stereoscopic image 105 can be completely separated.

를 가지고 프리즘 어레이(103)에 입사되는 높이는

가 되고, 디스플레이 패널(101)의 상단부에서 출력된 광선이 프리즘 어레이(103)에 입사되는 높이는

가 된다. 이 때, 두 광선이 겹치지 않기 위해서는 수학식 1을 만족해야 한다.In this regard, when the height of the display panel 101 is h _d , the light beam output from the lower end of the display panel 101 is incident on the display panel 101 at an incident angle

And the height incident on the prism array 103 is

And the height at which the light beam output from the upper end of the display panel 101 is incident on the prism array 103

. In this case, Equation (1) must be satisfied in order that the two rays do not overlap.

가 작아지면 디스플레이 패널(101)과 프리즘 어레이(103) 간의 거리가 멀어지게 되어 입체 영상에 대한 화질이 떨어지는 문제점이 있다.However, when the height of the display panel 101 is increased or the incident angle of the light incident on the display panel 101

The distance between the display panel 101 and the prism array 103 is increased, and thus the image quality of the stereoscopic image is deteriorated.

가 커져 제 1 입체 영상(107)과 제 2 입체 영상(105)이 분리될 수 있다. 하지만 프리즘의 꼭지각의 크기가 작아지게 되면 프리즘의 두께가 두꺼워지고 내부 전반사 등의 문제 등으로 인하여 화질의 저하가 발생할 수 있다. Alternatively, by reducing the size of the vertex angle of a plurality of prisms constituting the prism array 103, the incident angle of the light incident on the prism array 103

The first stereoscopic image 107 and the second stereoscopic image 105 can be separated from each other. However, if the size of the vertex of the prism becomes smaller, the thickness of the prism becomes thicker and the image quality may be deteriorated due to problems such as total internal reflection.

Hereinafter, a spatial projection imaging apparatus for solving the problems described above will be described in detail.

2A and 2B are views of a spatial projection imaging apparatus using a field-of-view adjustment filter, according to an embodiment of the present invention.

Referring to FIG. 2A, the spatial projection imaging apparatus 20 may include a display panel 101, a prism array 103, and a field-of-view adjusting filter 105.

The display panel 101 can output a hologram image. For example, the display panel 101 may be composed of one of a 3D display including a parallax barrier capable of outputting a three-dimensional image, a lenticular, and a prism array. For example, the display panel 101 may consist of an integrated image display capable of outputting a three-dimensional volumetric image, a holographic display, a volumetric display based on a rotating screen, or a volumetric display based on a multi-layered structure.

The prism array 103 is installed in front of the display panel 101 and refracts the light rays of the hologram image outputted from the display panel 101 to form a stereoscopic image corresponding to the hologram image.

The field-of-view adjustment filter 105 is disposed between the display panel 101 and the prism array 103, and may be installed at an inclined angle.

The field-of-view adjustment filter 105 may block rays of light incident on the hologram image outputted from the display panel 101 at an angle within a predetermined range. For example, a first ray of light in a first range of rays of a hologram image output from the display panel 101 passes through the prism array 103, while a second ray of light at an angle of a second range And is blocked by the field-of-view adjustment filter 105. 3A and 3B, the details of the view adjustment filter 105 will be described.

3A, the field of view adjustment filter 105 includes a bottom surface 301, an upper surface 303, and a plurality of horizontally extending pluralities of viewers 301, And a barrier 311 of barrier layer 314.

The plurality of barriers 311 protrude vertically from the bottom surface 301 toward the top surface 303 and can be disposed at intervals along the longitudinal direction when the observer views the space projection imaging apparatus.

When the height 305 of the plurality of barriers 311 is P _h and the arrangement interval 307 between the plurality of barriers 311 is P _w , the angle of passage of light rays that can pass through the field- (309) is expressed by Equation (2).

Referring to FIG. 3B, the angle at which the light beam passes and the angle at which the light beam is blocked can be adjusted by adjusting the height and the arrangement interval 307 of the plurality of barriers 311. For example, reference numeral 313 denotes a first arrangement type of the barrier 311, which allows only a light ray within a certain angle of a light ray to pass through to see a stereoscopic image in a specific direction.

Reference numeral 315 denotes a second arrangement type of the barrier 311. By setting the height of the barrier 311 to be relatively high, the angle of passage of the light beam can be narrowed.

Reference numeral 317 denotes a third arrangement of the barrier 311, and the angle of passage of the light beam can be adjusted to be wide by setting the height of the barrier 311 to be low. Furthermore, as in the case of reference numerals 319 and 321, the passage angle of the light beam can be adjusted to be wider or narrower by setting the arrangement interval of the plurality of barriers 311 to be wider or narrower.

Referring again to FIG. 2A, the field-of-view adjustment filter 105 may change a predetermined angle with respect to a ray to be blocked by adjusting at least one of height and arrangement interval of the plurality of barriers 311.

For example, when a first ray incident in the first direction is incident on the prism array 103 and refracted, a first stereoscopic image 107 is formed behind the prism array 103, Since the second light beam is blocked by the field-of-view adjustment filter 105, no second stereoscopic image is formed behind the prism array 103.

_top인 제 1 광선(203)이 시역 조절 필터(105)에 입사되고, 시역 조절 필터(105)의 배리어(311)와 이루는 각도가

_bot 인 제 2 광선(205)이 시역 조절 필터(105)에 입사되는 경우, 시역 조절 필터(105)의 통과 각도

에 따라 제 1 방향으로 입사되는 제 1 광선(203)은 시역 조절 필터(105)를 통과하고 제 2 방향으로 입사되는 제 2 광선(205)은 차단될 수 있다. 2B, an angle formed between the plurality of light beams output from one pixel 201 of the display panel 101 and the barrier 311 of the field-of-view adjusting filter 105 is

_top is incident on the field-of-view adjustment filter 105, and the angle formed by the first light ray 203 and the barrier 311 of the field-

_When the second light ray 205, which is the _bot , is incident on the view adjustment filter 105, the passage angle of the view adjustment filter 105

The first light ray 203 incident in the first direction may be blocked by the second light ray 205 passing through the view adjustment filter 105 and incident in the second direction.

Accordingly, only the first light ray 203 in the first direction is refracted by the prism array 103 and projected as a stereoscopic image on the space. As a result, a large stereoscopic image can be seen in a wide viewing area without superimposing stereoscopic images.

If the angle of passage of the light rays is adjusted to be small in the view adjustment filter 105, the angles of the rays incident on the prism array 103 become small, and the vertical viewing range of the spatial projection imaging apparatus 20 becomes narrow. The angle of passage of the filter 105 should be appropriately adjusted in accordance with the characteristics of the spatial projection imaging apparatus 20.

4A and 4B are views of a spatial projection imaging device 40 using a field-of-view adjustment filter 105, in accordance with another embodiment of the present invention.

Referring to FIG. 4A, the spatial projection imaging apparatus 40 may include a display panel 101, a prism array 103, and a field-of-view adjusting filter 105. The display panel 101 can output a hologram image.

The prism array 103 is provided at a predetermined distance in front of the display panel 101 and can refract the light rays of the hologram image output from the display panel 101 to form a stereoscopic image.

The field-of-view adjustment filter 105 is attached to the front of the display panel 101 and can block rays of light incident on the hologram image outputted from the display panel 101 at an angle within a predetermined range. For example, the first light ray incident on the hologram image outputted from the display panel 101 at an angle of the first range passes through the field-of-view adjustment filter 105, but the second light ray, which is incident at an angle of the second range, Is blocked by the field-of-view adjustment filter 105.

_p)로 기울어져 돌출되어 있으며, 관찰자가 공간 투영 영상 장치를 바라볼 때 종방향을 따라 간격을 두고 배치될 수 있다. 5, a description will be made of a time-domain control filter 105 according to another embodiment of the present invention. 5, the view adjustment filter 105 includes a lower surface 501, an upper surface 503, and a plurality of horizontally extending pluralities of viewers 503, 503, And a barrier 513 of barrier 513. The plurality of barriers 513 are arranged at a predetermined angle (

_p , and can be spaced along the longitudinal direction when the observer looks at the spatial projection imaging device.

Since the plurality of barriers 513 are arranged in a tilted state, only light beams substantially parallel to the respective barriers 513 can pass through the field-of-view adjusting filter 105.

p라고 하면, 시역 조절 필터(105)를 통과하는 광선의 통과 각도

는 수학식 3과 같다. The arrangement interval 507 of the plurality of barriers 513 is P _w , the height 505 is P _h , and the inclined angle 511 of each barrier 513 is

p, the passage angle of the light ray passing through the time-

Is expressed by Equation (3).

 Accordingly, it is possible to adjust the output direction of the light beam and the angle of passage by adjusting the height, the arrangement interval and the angle (inclination degree of the barrier 513) of the plurality of the barriers 513.

Referring again to FIG. 4A, the field-of-view adjustment filter 105 adjusts the height and arrangement interval of the plurality of barriers 513, and the angle of the plurality of barriers 513, In order to control the angle of the predetermined range.

4B is a view showing a state in which a plurality of barriers 513 are inclined toward the upper side of the display panel 101 and the view adjustment filter 105 is used. 4B, a first light ray 403 incident in a first direction (upward direction) out of light rays output from one pixel 401 of the display panel 101 passes through a barrier 513 of the field-of-view adjusting filter 105, The second light ray 405 incident in the second direction (downward direction) can be blocked without passing through the field-of-view adjusting filter 105 .

6A and 6B are views of a spatial projection imaging device 60 using a field-of-view adjustment filter, in accordance with another embodiment of the present invention.

6A and 6B, the spatial projection imaging apparatus 60 may include a display panel 101, a prism array 103, a field-of-view adjustment filter 105, and a controller 501. The prism array 103 may be installed in front of the display panel 101.

The field-of-view adjustment filter 105 may be disposed between the display panel 101 and the prism array 103. For example, the field-of-view adjustment filter 105 may be slanted at a predetermined angle between the display panel 201 and the prism array 103 as shown in FIG. 6A. Or the viewing zone adjustment filter 105 may be installed in front of the display panel 101 as shown in FIG. 6B.

The control unit 507 can control the blocking angle of the field-of-view adjusting filter 105 so as to block rays of light incident on the hologram image outputted from the display panel 101 at an angle of a predetermined range.

The controller 507 may control the blocking angle of the field-of-view adjusting filter 105 so that light beams incident at a predetermined range of angles are blocked by adjusting the height, arrangement interval, and tilted angle of the plurality of barriers.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

It is intended that the present invention covers the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents. .

101: Display panel
103: prism array
105: Time Zone Filter

Claims (11)

In a spatial projection imaging apparatus,
A display panel for outputting a hologram image;
A prism array disposed at a front side of the display panel to refract light rays of the hologram image to form a stereoscopic image; And
A hologram image filter disposed between the display panel and the prism array for intercepting light rays incident at a predetermined angle among the hologram image rays output from the display panel,
The spatial projection imaging device comprising:
The method according to claim 1,
Wherein the field-of-view adjustment filter is installed between the display panel and the prism array at an angle.
3. The method of claim 2,
Wherein the field-of-view adjustment filter is configured so that the predetermined angle is changeable so that the angle of the predetermined range is controllable.
The method according to claim 1,
The field-of-view adjustment filter includes a plurality of barriers extending transversely between an upper surface and a lower surface
The spatial projection imaging device comprising:
5. The method of claim 4,
Wherein the plurality of barriers protrude in a vertical direction from the lower surface toward the upper surface, and are spaced apart along the longitudinal direction.
5. The method of claim 4,
Wherein the field-of-view adjustment filter is configured to control the angle of the predetermined range by changing at least one of a height and an arrangement interval of the plurality of barriers.
In a spatial projection imaging apparatus,
A display panel for outputting a hologram image;
A prism array disposed at a predetermined distance in front of the display panel and refracting a light ray of the hologram image to form a stereoscopic image; And
And a viewing angle adjusting filter attached to the front of the display panel for blocking rays incident on the hologram image at a predetermined angle among the rays of the hologram image outputted from the display panel,
The spatial projection imaging device comprising:
8. The method of claim 7,
The field-of-view adjustment filter includes a plurality of barriers extending transversely between an upper surface and a lower surface
The spatial projection imaging device comprising:
9. The method of claim 8,
Wherein the plurality of barriers protrude in a vertical direction from the lower surface toward the upper surface, and are spaced apart along the longitudinal direction.
9. The method of claim 8,
Wherein the field-of-view adjustment filter is configured to control the angle of the predetermined range by changing at least one of a height and an arrangement interval of the plurality of barriers.
In a spatial projection imaging apparatus,
A display panel;
A prism array disposed in front of the display panel;
A field-of-view adjusting filter disposed between the display panel and the prism array; And
A controller for controlling a blocking angle of the field-of-view adjusting filter so as to block rays of light incident on the hologram image outputted from the display panel at an angle of a predetermined range,
The spatial projection imaging device comprising:

Images