KR102087109B1 - System and method for controlling displaying image based user recognition using transparent screen - Google Patents

Abstract

The present invention is a user recognition-based image display control using a screen device having a holographic optical element manufactured by a transmissive hologram recording method, a reflective hologram recording method, etc. when controlling the display of an image based on information obtained by recognizing a user Propose a system and method. The system according to the invention comprises: a transparent screen with a holographic optical element in the form of a film; A user information acquisition unit located on a different side from the user based on the transparent screen, and obtaining user information including a location of the user's hand through the transparent screen; And an image output control unit outputting an image to the transparent screen based on user information.

Description

System and method for controlling displaying image based user recognition using transparent screen}

The present invention relates to a system and method for controlling the display of an image. More specifically, it relates to a system and method for controlling the display of an image based on information obtained by recognizing a user.

Screen devices are generally made of opaque or translucent materials to effectively display an image output by a projector.

However, as illustrated in FIG. 1, when the 3D camera 120 and the user 130 are located on both sides of the translucent screen 110, the 3D camera 120 is the hand of the user 130 due to the translucent screen 110. It becomes impossible to recognize motion. That is, in the structure as shown in FIG. 1, there is a problem that it is impossible for the 3D camera 120 to track the position of the user 130 hand.

Korean Patent Publication No. 2011-0093446 (Publication Date: 2011.08.18.)

The present invention has been devised to solve the above-mentioned problems, and proposes a user recognition-based image display control system and method using a screen device having a holographic optical element manufactured by a transmissive hologram recording method, a reflective hologram recording method, and the like. It aims to do.

However, the object of the present invention is not limited to the above-mentioned matters, and other objects not mentioned will be clearly understood by those skilled in the art from the following description.

The present invention was devised to achieve the above object, a transparent screen having a holographic optical element (Holographic Optical Elements) in the form of a film; A user information acquisition unit located on a different side from the user based on the transparent screen, and obtaining user information including a position of a user's hand through the transparent screen; And an image output control unit outputting an image to the transparent screen based on the user information.

Preferably, the user information acquisition unit acquires the user information using a 3D depth camera.

Preferably, the image output control unit outputs the image using a projector located on the same side as the user information acquisition unit.

Preferably, the transparent screen is placed on the ground using a support structure including a first flat plate formed in a horizontal direction with respect to the ground and a second flat plate formed in a vertical direction with respect to the ground from one end surface of the first flat plate. It is located in space.

Preferably, the video display control system is mounted on the kiosk.

Preferably, the transparent screen includes a transparent element formed of a transparent material; And a base film; And a first holographic optical element formed on the base film and including a first hologram pattern formed based on interference between multiple diverging object beams and a reference beam.

Preferably, the transparent screen includes a transparent element formed of a transparent material; And base film; And a second holographic pattern formed on the base film, the second hologram pattern formed based on interference between an object light incident on one side of the base film and a reference light incident on the other side of the base film. And optical elements.

In addition, the present invention is a method for operating a user recognition-based image display control system including a user information acquisition unit, an image output control unit, and a transparent screen, comprising the transparent screen having a holographic optical element in the form of a film. Acquiring user information including a position of a user's hand through the transparent screen by the user information acquisition unit located on a different side from the user as a reference; And outputting an image on the transparent screen based on the user information by the image output control unit.

The present invention can achieve the following effects through the configuration for achieving the above object.

First, even if the camera and the user are located on both sides of the screen, it is possible for the camera to accurately recognize the position or touch of the user's hand and output an image corresponding thereto to the screen.

Second, it can be applied to provide customized information to users through kiosks.

1 is a conceptual diagram schematically showing a conventional video display control system.
2 is a conceptual diagram schematically showing an image display control system according to an embodiment of the present invention.
3 is a cross-sectional view showing a detailed structure of a screen device according to a first embodiment of the present invention.
4 is a reference diagram showing an incident shape of an object light and a reference light used for generating a holographic optical element according to a first embodiment of the present invention.
5 is an exemplary view of a first embodiment for explaining a method of generating a holographic optical device according to a first embodiment of the present invention.
6 is an exemplary view of a second embodiment for explaining a method of generating a holographic optical device according to a first embodiment of the present invention.
7 is a cross-sectional view showing the internal structure of a screen device according to a second embodiment of the present invention.
8 is a reference diagram showing an incident shape of an object light and a reference light used for generating a holographic optical element according to a second embodiment of the present invention.
9 is a conceptual diagram illustrating a method of manufacturing a holographic optical device according to a second embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, when adding reference numerals to the components of each drawing, it should be noted that the same components have the same reference numerals as possible even though they are displayed on different drawings. In addition, in describing the present invention, when it is determined that detailed descriptions of related well-known structures or functions may obscure the subject matter of the present invention, detailed descriptions thereof will be omitted. In addition, a preferred embodiment of the present invention will be described below, but the technical spirit of the present invention is not limited to or limited thereto, and can be variously implemented by a person skilled in the art.

2 is a conceptual diagram schematically showing an image display control system according to an embodiment of the present invention.

According to FIG. 2, the image display control system 200 proposed in the present invention includes a 3D sensor unit 210, an image display unit 220, an image control unit 230, and a transparent screen 240.

The 3D sensor unit 210 is located on the other side from the user based on the transparent screen 240. That is, when the user's hand is located on the left side of the transparent screen 240, the 3D sensor unit 210 is located on the right side of the transparent screen 240, and when the user's hand is located on the upper side of the transparent screen 240, the 3D sensor The unit 210 is located under the transparent screen 240.

The 3D sensor unit 210 performs a function of recognizing information about a user, such as a user's hand position, touch, and gesture, in the above arrangement. The 3D sensor unit 210 performs a function of transmitting information about the user to the image controller 230 when information about the user is obtained. The 3D sensor unit 210 may be implemented as, for example, a 3D depth camera.

The image display unit 220 is located on the same side as the 3D sensor unit 210 based on the transparent screen 240. That is, when the 3D sensor unit 210 is located on the right side of the transparent screen 240, the image display unit 220 is also located on the right side of the transparent screen 240, and the 3D sensor unit 210 is located on the lower side of the transparent screen 240. When located on the image display unit 220 is also located under the transparent screen 240.

The image display unit 220 performs a function of outputting a predetermined image on the transparent screen 240 in the above arrangement. The image display unit 220 may output a predetermined image on the transparent screen 240 under the control of the image control unit 230. The image display unit 220 may be implemented as a projector, for example.

The image controller 230 performs a function of controlling the 3D sensor unit 210 and the image display unit 220. The image controller 230 and the 3D sensor unit 210 so that a predetermined image is output on the transparent screen 240 by the image display unit 220 based on information about the user obtained by the 3D sensor unit 210 The image display unit 220 may be controlled.

As an example, when the 3D sensor unit 210 is located below the transparent screen 240 and the user's hand is positioned on the side of the transparent screen 240 from the top of the transparent screen 240, the image control unit 230 The 3D sensor unit 210 and the image display unit 220 may be controlled to output an image suitable for the location of the user's hand. The image control unit 230 may be implemented as, for example, a computer or a server.

The transparent screen 240 displays an image output from the image display unit 220 under the control of the image control unit 230. In the present invention, when the 3D sensor unit 210 and the user's hand are located on different sides of the transparent screen 240, the 3D sensor unit 210 effectively recognizes the location, touch, gesture, etc. of the user's hand, A transparent screen 240 formed in a form in which a HOE (Holographic Optical Elements) film is attached to one surface of a transparent structure such as acrylic or glass is used.

As a HOE film provided on the transparent screen 240, a predetermined holographic optical element (HOE) may be produced and used in the form of a film. In the present invention, VHOE manufactured according to a transmissive hologram recording method, a reflective hologram recording method, etc. (Volume Holographic Optical Elements) film is also possible. The VHOE film will be described later.

The transparent screen 240 is, for example, taking into account the point applied to the screen of the kiosk (Kiosk), the length formed in the vertical direction from the first plate 251 formed in the horizontal direction and one end of the first plate 251 in the horizontal direction The second flat plate 252 may be formed on a predetermined space on the ground through the support structure 250 formed by coupling. The transparent screen 240 may have a structure other than the above-described structure in the present invention if the 3D sensor unit 210 and the user's hand are positioned on both sides.

On the other hand, when the transparent screen 240 is formed on the space above the ground through the support structure 250, the image display unit 220 is the first flat plate in the inner space formed by the transparent screen 240 and the support structure 250 It may be formed on (251), 3D sensor unit 210 may be attached to one side of the second flat plate (252).

The image display control system 200 proposed in the present invention is a user recognition based system that utilizes the transparency of the transparent screen 240, and uses the transparent screen 240 with a HOE film as a screen device. So, when the image display control system 200 is applied to the kiosk, the 3D sensor unit 210 can be located inside the kiosk. When the 3D sensor unit 210 is formed inside the kiosk, it is possible to obtain an effect of reducing the possibility of damage than when it is located outside the kiosk. In addition, since the 3D sensor unit 210 recognizes the position of the user's hand in the vertical direction from the lower side of the transparent screen 240, than when recognizing the position of the user's hand at an oblique angle from the upper side of the transparent screen 240 An effect of improving the recognition rate can also be obtained.

Next, the transparent screen 240 provided with the VHOE film will be described. First, a transparent screen having a VHOE film manufactured according to a transmission hologram recording method will be described, and then a transparent screen having a VHOE film manufactured according to a reflective hologram recording method will be described.

3 is a cross-sectional view showing a detailed structure of a screen device according to a first embodiment of the present invention.

The screen device according to the first embodiment, that is, the first screen device 300 is a holographic optical element in which a hologram pattern is formed according to a transmission hologram recording method based on multiple diverging object light and reference light, that is, the first holographic optics The device 320 is provided.

The first holographic optical element 320 is suitable for a transparent screen device such as a beam projector screen, and has a wide viewing angle and high luminance characteristics. In addition, the first holographic optical element 320 is capable of effectively projecting an image even if the projection angle by the beam projector has a large inclination angle, and full color expression is also possible. Hereinafter, the present invention will be described in detail with reference to FIG. 3.

According to FIG. 3, the first screen device 300 includes a transparent element 310 and a first holographic optical element 320. In the present invention, the first screen device 300 may be applied as a beam projector screen.

The transparent element 310 has a plate shape and may be formed of a transparent material. The transparent element 310 may be formed of, for example, a glass component as a material, but the present invention is not limited thereto, and may be formed of an acrylic component or the like.

The first holographic optical element 320 is a diffraction plate including volume diffraction elements diffracted in a pre-designed direction, and functions to transmit and diffract light having different wavelength bands in the same direction. The first holographic optical element 320 may be formed as a single layer and stacked on the bottom surface of the transparent element 310.

The first holographic optical element 320 may be stacked on the bottom surface of the transparent element 310 using a lamination method. The first screen device 300 may further include a coating layer (not shown). When the first holographic optical element 320 is stacked on the bottom surface of the transparent element 310, the coating layer may be stacked on the top surface of the transparent element 310. The coating layer may be formed of an anti-reflection (AR) coating layer.

The first holographic optical element 320 may be generated by forming a pattern on a volume holographic optical element (VHOE) film using a transmissive hologram recording method. A detailed description of the transmissive hologram recording method will be described later with reference to FIGS. 5 and 6.

The first holographic optical element 320 may be generated by recording a VHOE film using multiple divergent beams having a wide angle as object light. In detail, the first holographic optical element 320 proposed in the present invention can be generated by dispersing and diffracting respective color lights such as R, G, and B on a VHOE film using white light as an ambient light source. Also, the first holographic optical element 320 may be generated as an element that performs a transparent screen function by allowing the diffused and diffracted color lights to overlap and radiate.

The first holographic optical element 320 may be generated by sequentially transmitting red light, green light, blue light, etc. in a predetermined order to perform a transparent screen function even when light of any wavelength band is incident. Here, red light means light having a wavelength band associated with red (R), green light means light having a wavelength band associated with green (G), and blue light has a wavelength band associated with blue (B). It means light.

The first holographic optical element 320 may be generated as an element capable of performing a transparent screen function according to the following procedure.

First, red light is transmitted at a first angle to one surface of the first holographic optical element 320. Then, primary dispersion and diffraction are reflected on the first holographic optical element 320 by red light.

The first angle may be determined based on the angle between the object light and the reference light. The incident angle of the object light may be determined based on the viewer's gaze angle looking at the first screen device 300. In addition, the incident angle of the reference light may be determined based on the incident angle of the projector beam projected on the first screen device 300. In the present invention, the first angle may be determined based on the incident angle of the object light and the incident angle of the reference light determined as described above.

Thereafter, green light is transmitted at a second angle to the same surface of the first holographic optical element 320. Then, secondary dispersion and diffraction are reflected to the first holographic optical element 320 by red light and then green light.

Light having different wavelength bands form different diffraction angles when passing through the first screen device 300. In the present invention, considering this point, the second angle can be determined based on the optical diffraction angle unique to each wavelength. Since the second angle is related to the diffraction angle for each wavelength, the second angle must be minimized in order for the first screen device 300 to secure a wider viewing angle than the conventional one. Therefore, the second angle is preferably formed at a much smaller angle than the first angle.

Meanwhile, the wavelength band of green light is closer to the wavelength band of red light than the wavelength band of blue light. In the present invention, a second angle obtained by subtracting a predetermined angle from a first angle is used as an incident angle of green light in consideration of the law of color dispersion.

Thereafter, blue light is transmitted at a third angle to the same surface of the first holographic optical element 320. Then, the third dispersion and diffraction are reflected to the first holographic optical element 320 by red light and green light, followed by blue light.

Like the second angle, the third angle may be determined based on the optical diffraction angle unique to each wavelength. The third angle is preferably formed at a much smaller angle than the first angle, like the second angle.

Meanwhile, the wavelength band of blue light is closer to the wavelength band of green light than the wavelength band of red light. In the present invention, in consideration of the law of color dispersion, an angle equal to the second angle can be used as an angle of incidence of blue light as a third angle, or an angle obtained by adding or subtracting a predetermined angle from the second angle can be used as an angle of incidence of blue light. have.

On the other hand, if the first holographic optical element 320 can effectively perform the transparent screen function, it may be generated by using light related to other colors in addition to red light, green light, blue light, and the like.

Meanwhile, when the first holographic optical element 320 is manufactured in a large size, it may be generated in the following manner.

First, the first holographic optical element 320 may be generated by recording a large area using divergent type object light and divergent type reference light.

Second, the first holographic optical element 320 may be generated in a multiple recording method using a masking technique and a shifting technique.

Third, the first holographic optical element 320 may be generated by recording a large area using a tiling technique.

Meanwhile, the first holographic optical element 320 may be sealed after being generated and then laminated to the bottom surface of the transparent element 310 using either a thermal compression method or an adhesive compression method. The present invention can prevent the first holographic optical element 320 from being deteriorated through the sealing process, and it is possible to protect the first holographic optical element 320 from the external environment.

When performing the transparent screen function, the first holographic optical element 320 may increase the difference in incident angle between lights having different wavelength bands to secure a wide field of view (FOV). The conventional viewing angle is based on the viewing angle of a general scattering white screen. The 'wide viewing angle' referred to above means a relatively wide viewing angle than this conventional viewing angle.

In the present invention, the first holographic optical element 320 may be generated by recording the VHOE film using interference between an object beam and a reference beam. The shape of the object light and the reference light used to generate the first holographic optical element 320 may be designed with the following in mind.

(1) Design the shape of the object light so as to maximize the diffraction efficiency of incident color lights and ensure an optimized wide viewing angle (FOV). For this, the object light can be designed as follows.

① It can be designed as a beam forming a uniform intensity distribution as a whole.

② It can be designed as a beam having a scattering angle related to the viewing angle of a typical white screen.

③ It can be designed as a beam having the maximum efficiency of light intensity.

(2) The shape of the reference light is designed to obtain an optimized light efficiency for acting as a transparent screen for the projected light. To this end, the reference light can be designed as follows.

① It can be designed as a beam forming a uniform intensity distribution as a whole while having a screen shape with a desired size and proportion.

② It can be designed as a beam having the maximum efficiency of light intensity.

4 is a reference diagram showing an incident shape of an object light and a reference light used for generating a holographic optical element according to a first embodiment of the present invention.

The object light 440 is incident on the first holographic optical element 320 in the form of light emitted as shown in FIGS. 4A and 4B. On the other hand, the reference light 450 is a form of light incident on the first holographic optical element 320 in the form of parallel light as shown in FIG. 4 (a) or diverging as shown in FIG. 4 (b). As a result, it may be incident on the first holographic optical element 320. In the present invention, it is preferable to enter the first holographic optical element 320 in the form of light that emits the reference light 450 together with the object light 440 to obtain a wider viewing angle.

The first holographic optical element 320 may be generated using a lens array, a prism sheet, or a light diffusion plate to obtain an optimized wide viewing angle (FOV). This will be described below.

5 is an exemplary view of a first embodiment for explaining a method of generating a holographic optical device according to a first embodiment of the present invention.

First, the object light 440 is sequentially incident on the prism sheet 410, the lens sheet 420, and the diffusion plate 430 (STEP A).

Subsequently, the object light 440 and the reference light 450 that have passed through the prism sheet 410, the lens sheet 420, and the diffusion plate 430 in turn are simultaneously incident on the first holographic optical element 320 (STEP). B).

The object light 440 passes through the prism sheet 410, the lens sheet 420, the diffusion plate 430, and the like, and enters the first holographic optical element 320 in the form of a multi-emission beam. In the present invention, in order to secure transparency, the object light 440 may be formed as a multi-emissive beam using a prism sheet 410, a lens sheet 420, a diffusion plate 430, or the like.

The reference light 450 has a different angle of incidence from the object light 440 with respect to one surface of the first holographic optical element 320. Unlike the object light 440, the reference light 450 is incident on the first holographic optical element 320 without passing through the prism sheet 410, the lens sheet 420, and the diffusion plate 430. In this case, the reference light 450 may be incident on the first holographic optical element 320 in the form of a parallel beam, or may be incident on the first holographic optical element 320 in the form of a divergent beam.

Thereafter, a first pattern 322a is formed on the first holographic optical element 320 by interference between the object light 440 and the reference light 450 (STEP C).

In the present invention, when an object wave 440 is incident on the prepared optical systems 410, 420, and 430 as parallel light and an overlapping wavefront is obtained by multiple divergent light, an interference pattern between the wavefront and the reference light 450 is obtained. The first pattern 322a is formed on the first holographic optical element 320 by recording on an optical diffraction plate.

The prism sheet 410 means a sheet on which a micro prism array 411 is formed.

The prism sheet 410 functions to condense the incident object light 440. This function of the prism sheet 410 can obtain an effect of improving luminance. In the present invention, if it is possible to perform the function of condensing the object light 440, it is also possible to use a condensing sheet other than the prism sheet 410 or a condensing lens (ex. Fresnel lens).

The lens sheet 420 means a micro lens sheet in which a micro lens array 421 is formed on one surface. In the present invention, the micro lens array 421 may be composed of a plurality of convex lenses.

The lens sheet 420 may be formed of convex lenses having a short focal length to diameter to obtain a wide viewing angle. However, the present invention is not limited to this, and the lens sheet 420 may be formed of concave lenses in addition to convex lenses if the focal length is shorter than the diameter. Also, the lens sheet 420 may be configured with a combination of convex lenses and concave lenses satisfying the above conditions.

The diffusion plate 430 refers to a component including micro diffusion elements 431 therein. The diffusion plate 430 functions to diffuse the object light 440 that has passed through the prism sheet 410 and the lens sheet 420 in order to the entire surface of the second holographic optical element 510. In the present invention, instead of the diffusion plate 430, it is also possible to use another (ex. Diffusion sheet) that functions to diffuse light.

Meanwhile, when the first holographic optical element 320 is generated in the present invention, the prism sheet 410, the lens sheet 420, and the diffusion plate 430 may not be provided. When only one of the prism sheet 410, the lens sheet 420, and the diffusion plate 430 is provided, the first holographic optical element 320 is incident as shown in FIGS. 4A and 4B. A diffuser plate 430 may be provided to generate the object light 440 to be emitted in the form of light. In addition, when two of the prism sheet 410, the lens sheet 420 and the diffusion plate 430 are selectively provided, any one of the prism sheet 410 and the lens sheet 420 together with the diffusion plate 430 is provided. It can be provided.

6 is an exemplary view of a second embodiment for explaining a method of generating a holographic optical device according to a first embodiment of the present invention.

First, the object light 440 and the reference light 450 are sequentially incident on the prism sheet 410, the lens sheet 420, the diffusion plate 430, and the like. At this time, the object light 440 and the reference light 450 have different angles of incidence with respect to the same surface of the prism sheet 410.

Thereafter, when the object light 440 and the reference light 450 pass through the prism sheet 410, the lens sheet 420, and the diffusion plate 430, the object light 440 and the reference light 450 pass through the first holographic image. The second pattern 322b is formed on the first holographic optical element 320 by interference between the object light 440 and the reference light 450 by incident on the optical element 320.

The first pattern 322a formed on the first holographic optical element 320 according to the first embodiment of FIG. 5 and the first pattern 322a formed on the first holographic optical element 320 according to the second embodiment of FIG. 6 The two patterns 322b have different shapes because the targets to which the reference light 450 is incident (the first holographic optical element 320 in FIG. 5 and the prism sheet 410 in FIG. 6) are different. However, it is noted that each pattern 122a, 122b has a constant period and a constant distribution ratio as shown in FIGS. 5 and 6.

The first and second embodiments for generating the first holographic optical element 320 have been described above with reference to FIGS. 5 and 6. The first embodiment of FIG. 5 is the first holographic optical element 320 in the form of light incident on the first holographic optical element 320 in the form of light emitted by the object light 440 and parallel to the reference light 450. It is an example in the case of incident on (see Fig. 4 (a)). On the other hand, the second embodiment of FIG. 6 is an example when the object light 440 and the reference light 450 are both incident on the first holographic optical element 320 in the form of emitted light (see FIG. 4 (b)). ).

It will be described again with reference to FIG. 3.

The first holographic optical element 320 includes a base film 321 and a first hologram pattern 322 formed on the base film 321.

When the first hologram pattern 322 is exposed according to the interference pattern by the object light 440 and the reference light 450, a specific shape is aligned while a monomer is polymerized by combining with a functional group. Is formed.

The shape of the first hologram pattern 322 illustrated in FIG. 3 is only an example, and the shape of the first hologram pattern 322 in the present invention is not limited thereto. The first hologram pattern 322 may have various shapes according to a distance between the diffusion plate 430 and the first holographic optical element 320.

The distance between the diffusion plate 430 and the first holographic optical element 320 may be changed according to characteristics of the first screen device 300 such as uniformity of light efficiency and viewing angle. That is, when the distance between the diffuser plate 430 and the first holographic optical element 320 is set to be narrow, the viewing angle can be enlarged while reducing the uniformity of light efficiency, and the diffuser plate 430 and the first holographic optical element ( 320) By setting the distance between them wide, the viewing angle can be shrunk while increasing the uniformity of light efficiency. In the above, the distance between the diffuser plate 430 and the first holographic optical element 320 is the first holographic optical element 320 after the object light 440 multiplies by the diffuser plate 430 in FIG. 5. It means the distance traveled to reach, and in FIG. 6, the combined light of the object light 440 and the reference light 450 is diverged by the diffuser plate 430 to the first holographic optical element 320. It means the distance traveled to reach.

Next, a transparent screen including a VHOE film manufactured according to a reflective hologram recording method will be described.

7 is a cross-sectional view showing the internal structure of a screen device according to a second embodiment of the present invention.

The screen device according to the second embodiment, that is, the second screen device 500 is a holographic optical element in which a hologram pattern is formed according to a reflective hologram recording method based on object light and reference light incident from different directions, that is, A holographic optical element 520 is provided.

The second holographic optical element 520, like the first holographic optical element 320, is suitable for a transparent screen device such as a beam projector screen, and has a wide viewing angle and high luminance characteristics. In addition, the second holographic optical element 520 can effectively project an image even if the projection angle by the beam projector has a large inclination angle, and full color expression is also possible. Hereinafter, the present invention will be described in detail with reference to FIG. 7.

According to FIG. 7, the second screen device 500 includes a transparent element 310 and a second holographic optical element 510. In the present invention, the second screen device 500 may be used as a beam projector screen as in the first screen device 300.

The second holographic optical element 510 is a diffraction plate including volume diffraction elements diffracted in a pre-designed direction, and functions to transmit and diffract light having different wavelength bands in the same direction. The second holographic optical element 510 may be formed as a single layer and stacked on the bottom surface of the transparent element 310.

The second holographic optical element 510 may be stacked on the bottom surface of the transparent element 310 using a lamination method. The second screen device 500 may further include a coating layer (not shown). When the second holographic optical element 510 is stacked on the bottom surface of the transparent element 310, the coating layer may be stacked on the top surface of the transparent element 310. In the present invention, the coating layer may be formed of an anti-reflection (AR) coating layer.

The second holographic optical element 510 may be generated by forming a pattern on a volume holographic optical element (VHOE) film using a reflective hologram recording method. A detailed description of the reflective hologram recording method will be described later with reference to FIG. 9.

The second holographic optical element 510 may be generated by recording the VHOE film using multiple divergent light having a wide angle as object light. In detail, the second holographic optical element 510 proposed in the present invention can be generated by dispersing and diffracting respective color lights such as R, G, and B on a VHOE film using white light as an ambient light source. In addition, the second holographic optical element 510 may be generated as an element that performs a transparent screen function by allowing diffused and diffracted color lights to overlap and radiate.

The second holographic optical element 510 determines a red beam, a green beam, a blue beam, and the like in order to perform a transparent screen function even when light of any wavelength band is incident. Depending on the permeation can be generated. The method of generating the second holographic optical element 510 by sequentially using red light, green light, blue light, and the like is the same as that of the first holographic optical element 320, and thus detailed description thereof will be omitted here. .

In addition, the case where the second holographic optical element 510 is manufactured in a large size is the same as that of the first holographic optical element 320, so a detailed description thereof will be omitted here.

8 is a reference diagram showing an incident shape of an object light and a reference light used for generating a holographic optical element according to a second embodiment of the present invention.

The object light 610 is incident on one side of the second holographic optical element 510 in the form of light emitted as shown in FIGS. 8A and 8B. On the other hand, the reference light 620 is incident on the other side of the second holographic optical element 510 in the form of parallel light as shown in Figure 8 (a), or diverged as shown in Figure 8 (b) It may be incident on the other side of the second holographic optical element 510 in the form of light. In the present invention, it is preferable to enter the second holographic optical element 510 in the form of light that emits the reference light 620 together with the object light 610 to obtain a wider viewing angle.

The second holographic optical element 510 may be generated using a lens sheet, a prism sheet, or a light diffusion plate to obtain an optimized wide viewing angle (FOV). This will be described below.

9 is a conceptual diagram illustrating a method of manufacturing a holographic optical device according to a second embodiment of the present invention.

First, the prism sheet 410, the lens sheet 420, the diffuser plate 430, the second holographic optical element 510, the mirror assembly 710, and the like are sequentially arranged (STEP A).

Then, the object light 610 in the form of parallel light is incident on the prism sheet 410 (STEP B). The object light 610 incident on the prism sheet 410 passes through the prism sheet 410, the lens sheet 420, the diffuser plate 430, and the like, in the form of divergent light (multiple divergent beams). ) And is incident on the second holographic optical element 510 (STEP C). In the present invention, transparency can be secured by forming the object light 610 as a beam that emits multiple light by using the prism sheet 410, the lens sheet 420, and the diffusion plate 430.

On the other hand, when generating the second holographic optical element 510 in the present invention, the prism sheet 410, the lens sheet 420, the diffusion plate 430, etc. may not be provided. When only one of the prism sheet 410, the lens sheet 420, and the diffusion plate 430 is provided, it is incident on the second holographic optical element 510 as shown in FIGS. 8A and 8B. A diffuser plate 430 may be provided to generate the object light 610 to be emitted in the form of light. In addition, when two of the prism sheet 410, the lens sheet 420 and the diffusion plate 430 are selectively provided, any one of the prism sheet 410 and the lens sheet 420 together with the diffusion plate 430 is provided. It can be provided.

When the reference light 620 is incident on the second holographic optical element 510, it is incident at a different incident angle from the object light 610. When the object light 610 incident on the second holographic optical element 510 passes through the second holographic optical element 510 and is output to the outside, the object light 610 is a mirror assembly 340 Is reflected by the second holographic optical element 510 (STEP D). In the present invention, the reflected light is used as the reference light 620.

The mirror assembly 340 functions to reflect light, and may include a micro mirror array 341 on one surface of the present invention. The micro-mirror array 341 is a device that serves to reflect the beam at an inclination angle designed by returning the light transmitted through the film, and may be composed of a plurality of concave mirrors, and a reference light on the front surface of the holographic optical device 120 It can be composed of a plurality of concave mirrors inclined (inclined) at a predetermined angle in one direction so that it can be evenly incident.

The mirror assembly 340 includes a micro mirror array 341 composed of a plurality of concave mirrors (e.g. a micro lens array composed of a plurality of concave lenses) if it can perform a function of reflecting light. It is also possible.

The micro mirror array 341 may be composed of a plurality of concave mirrors as described above. In this case, the inclined direction is such that when the reference incident beam is incident vertically, the transmitted light is inclined and reflected from the upper direction to the lower direction, and from the left direction to the right direction. Is designed. However, the inclination direction may be changed depending on the recording system. The inclination angles can be respectively selected according to the recording angles such that they are inclined and reflected within 30 to 70 degrees. The divergence angle depends on the divergence angle of the applied beam project.

The size of the concave mirror should theoretically be less than 100 micrometers, but currently 1mm to 10mm is the actual size that can be produced as designed with a reflective recording pattern.

The light reflected from the mirror array becomes the reference light, and has a slope value in the range of 30 to 70 degrees.

When the light reflected by the mirror assembly 710 is incident on the second holographic optical element 510 as the reference light 620, the second holographic optical element (due to interference between the object light 610 and the reference light 620) A predetermined hologram pattern 712 is formed on 510 (STEP E).

In the present invention, when an object wave 610 is incident on the prepared optical systems 410, 420, and 430 as parallel light and an overlapping wavefront is obtained by multiple divergent light, an interference pattern between the wavefront and the reference light 620 is obtained. A predetermined hologram pattern 512 is formed on the second holographic optical element 510 by recording on the optical diffraction plate. The hologram pattern 512 thus formed has a constant period and a constant distribution ratio.

The method for manufacturing the second holographic optical element 510 has been described above with reference to FIG. 9. The embodiment of FIG. 9 is the second holographic optical element 510 in the form of light incident on one side of the second holographic optical element 510 in the form of light emitted by the object light 610 and the reference light 620 being parallel. ) Is an example of incident on the other side.

Meanwhile, in the present invention, the mirror assembly 710 includes a micro mirror array including a plurality of convex mirrors, a micro lens array including a plurality of convex lenses, and the like, instead of the micro mirror array 711 including a plurality of concave mirrors. It is also possible. In the present invention, the reference light 620 may be incident on the second holographic optical element 510 in the form of light emitted similarly to the object light 610 through these configurations.

The manufacturing method of the second holographic optical element 510 described above with reference to FIG. 9 is a diffusion film technology recorded in full color when recording in a reflective type, and is transparent while compensating for color dispersion. It is a technology that realizes a full color holographic diffusion film.

In the method proposed in the present invention, a hologram must be recorded with two beams incident in opposite directions, and a structure that causes interference by reflecting a transmitted beam with a mirror without using the two beams as before. This structure is based on the Dennischuck type reflective hologram recording principle, but unlike the existing Dennischk, the structure uses a reflected beam as a reference beam. Therefore, although the existing structure cannot avoid color dispersion as pure hologram recording, the present technology is a structure capable of solving the problem.

The technology of the present invention can also be recorded in large format. When projecting, it is composed of a front projection type, and the transmissive type basically requires a lot of space on the back side, but in the case of a reflective type, the basic projection display space has an advantage of being in close contact with the wall surface.

It will be described again with reference to FIG. 7.

The second holographic optical element 510 includes a base film 511 and a second hologram pattern 512 formed on the base film 511.

When the second hologram pattern 512 is exposed according to the interference pattern by the object light 610 and the reference light 620, a specific shape is aligned while a monomer is polymerized by combining with a functional group. Is formed.

The shape of the second hologram pattern 512 illustrated in FIG. 7 is only an example, and the shape of the second hologram pattern 512 in the present invention is not limited thereto. The second hologram pattern 512 is the distance between the diffuser plate 430 and the second holographic optical element 510, the type of the reference light 620 incident on the second holographic optical element 510 (ex. , Parallel light, etc.).

The distance between the diffuser plate 430 and the second holographic optical element 510 is moved until the object light 610 is multiplied by the diffuser plate 430 and reaches the second holographic optical element 510. Mean distance.

The distance between the diffusion plate 430 and the second holographic optical element 510 may be changed according to characteristics of the second screen device 500 such as uniformity of light efficiency and viewing angle. When the distance between the diffuser plate 430 and the second holographic optical element 510 is set narrow, the viewing angle may be enlarged while reducing the uniformity of light efficiency. On the other hand, if the distance between the diffuser plate 430 and the second holographic optical element 510 is set wide, the viewing angle may shrink while increasing the uniformity of light efficiency.

The embodiments of the present invention have been described above with reference to FIGS. 1 to 9. Hereinafter, a preferred embodiment of the present invention that can be deduced from such an embodiment will be described.

A user recognition-based image display control system according to a preferred embodiment of the present invention includes a transparent screen, a user information acquisition unit, and an image output control unit.

The transparent screen is provided with a holographic optical element in the form of a film. The transparent screen is a concept corresponding to the transparent screen 240 of FIG. 2.

The transparent screen may be positioned on the space above the ground by using a support structure including a first flat plate formed in a horizontal direction with respect to the ground and a second flat plate formed in a vertical direction with respect to the ground from one end surface of the first flat plate. You can.

The user information acquisition unit is located on a different side from the user based on the transparent screen. The user information acquisition unit performs a function of acquiring user information including a location of a user's hand through a transparent screen. The user information acquisition unit is a concept corresponding to the 3D sensor unit 210 of FIG. 2.

The user information acquisition unit may acquire user information using a 3D depth camera.

The image output control unit outputs an image on the transparent screen based on the user information acquired by the user information acquisition unit. The image output control unit is a concept corresponding to the image control unit 230 of FIG. 2.

The image output control unit may output an image using a projector located on the same side as the user information acquisition unit.

The video display control system described above may be mounted on the kiosk.

Next, a transparent screen will be described. Hereinafter, a transparent screen manufactured according to the transmission hologram recording method is defined as a first transparent screen, and a transparent screen manufactured according to the reflective hologram recording method is defined as a second transparent screen.

The first transparent screen includes a transparent element and a first holographic optical element. The first transparent screen is a concept corresponding to the first screen device 300 of FIG. 3.

The transparent element is formed of a transparent material.

The first holographic optical element is formed on a base film and includes a first hologram pattern formed based on interference between multiple diverging object beams and a reference beam. The first holographic optical element may be stacked on one surface of the transparent element.

The first holographic optical element is a hologram recording method using light emitted as reference light, a holographic recording method using a multi-recording method using mask shifting, and a tile having a predetermined size on which a pattern is formed. Based on at least one hologram recording method among the hologram recording methods for performing) may be produced in a larger form than the reference.

The first holographic optical element may form a first hologram pattern using reference light having a different shape depending on whether the light output by the beam projector is parallel light.

The first holographic optical element forms a first hologram pattern by using reference light moving in parallel when the light output by the beam projector is parallel light, and uses the reference light emitted when the light output by the beam projector is not parallel light By doing so, a first hologram pattern can be formed.

The first hologram pattern may be formed by sequentially using light associated with colors that generate white in combination as object light.

The first hologram pattern may use light related to red, light related to green, and light related to blue as lights related to colors that generate white in combination. At this time, light related to red, light related to green, and light related to blue may be transmitted to the base film at different incidence angles. The incident angle of the light associated with red may have a larger value than the incident angle of the light associated with green and the incident angle of light associated with blue.

The first hologram pattern may be formed using object light in the order of light related to red, light related to green, and light related to blue.

The first hologram pattern may be formed using divergent light or parallel light as reference light.

The shape of the first hologram pattern may be changed according to a distance between the element and the base film that multiply emit object light, or an object to which the reference light is incident.

When forming the first holographic pattern on the first holographic optical element, the object light may be transmitted through at least one of a prism sheet, a lens sheet, and a diffusion plate to multi-emit. . In the above, the lens sheet may include lenses having a relatively short focal length to diameter.

When the object light passes through the prism sheet, the lens sheet, and the diffuser plate, the prism sheet, the lens sheet, and the diffuser plate may sequentially transmit.

When the reference light is divergent light, at least one of a prism sheet, a lens sheet, and a diffusion plate may be transmitted.

The first transparent screen may further include a coating layer.

The coating layer is laminated on the other side of the transparent element.

Next, the second transparent screen will be described.

The second transparent screen includes a transparent element and a second holographic optical element. The second transparent screen is a concept corresponding to the second screen device 500 of FIG. 7.

The second holographic optical element is formed on the base film, and includes a second hologram pattern formed based on interference between an object light incident on one side of the base film and a reference light incident on the other side of the base film. The second holographic optical element may be stacked on one surface of the transparent element.

The second holographic optical element is a hologram recording method using divergent light as reference light, a holographic recording method using multiple masks using mask shifting, and tiling on a film having a predetermined size on which a pattern is formed. Based on at least one hologram recording method of performing the hologram recording method, it may be manufactured in a form larger than the reference.

The second holographic optical element may form a second hologram pattern using reference light having a different shape depending on whether the light output by the beam projector is parallel light.

The second hologram pattern may be formed based on the reference light incident at a different angle from the object light.

The second hologram pattern may be formed by using reflected light reflected after passing through the base film as a reference light.

The second hologram pattern may be formed based on reference light formed of reflected light by using a reflective unit that reflects light.

The second hologram pattern may be formed using a reflective unit in which a concave mirror array is formed on one side.

The second hologram pattern may be formed using a reflection unit in which a concave mirror array inclined at a predetermined angle is formed on one side.

The second hologram pattern may be formed by using multiple divergent lights as object light.

The second hologram pattern may be formed on the basis of object light generated by multiple divergent lights using a diffusion unit that multiple diverges light.

The second hologram pattern may be formed on the basis of object light generated by multiple divergent light passing through a prism sheet, a lens sheet, and a diffusion unit in sequence.

The second hologram pattern may be formed by sequentially using light associated with colors that generate white in combination as object light.

The second hologram pattern may be formed by sequentially using light related to red, light related to green, and light related to blue as object light. At this time, light related to red, light related to green, and light related to blue may be incident on the base film at different incidence angles. The incident angle of the light associated with red may have a larger value than the incident angle of the light associated with green and the incident angle of light associated with blue.

The second hologram pattern may have a different shape based on at least one of a distance between a diffusion unit for multi-emitting object light and a base film, and an incident shape of the reference light.

The second transparent screen may further include a coating layer laminated on the other surface of the transparent element.

Next, an operation method of the video display control system based on user recognition will be described.

First, based on a transparent screen having a holographic optical element in the form of a film, a user information acquisition unit located on a different side from the user acquires user information including the position of the user's hand through the transparent screen. (STEP A).

Thereafter, the image output control unit outputs the image on the transparent screen based on the user information (STEP B).

The fact that all the components constituting the embodiments of the present invention described above are described as being combined or operated as one, the present invention is not necessarily limited to these embodiments. That is, within the object scope of the present invention, all of the components may be selectively combined and operated. In addition, although all of the components may be implemented as one independent hardware, a part or all of the components are selectively combined to perform a combined function of some or all of functions in one or a plurality of hardware. It may be implemented as a computer program having a. In addition, such a computer program is stored in a computer-readable recording medium (Computer Readable Media), such as a USB memory, CD disk, flash memory, etc., and read and executed by a computer, thereby implementing an embodiment of the present invention. The recording medium of the computer program may include a magnetic recording medium, an optical recording medium, and the like.

In addition, all terms, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which the present invention pertains, unless otherwise defined in the detailed description. Commonly used terms, such as predefined terms, should be interpreted as being consistent with the contextual meaning of the related art, and are not to be interpreted as ideal or excessively formal meanings unless explicitly defined in the present invention.

The above description is merely illustrative of the technical idea of the present invention, and those of ordinary skill in the art to which the present invention pertains may make various modifications, changes, and substitutions without departing from the essential characteristics of the present invention. will be. Therefore, the embodiments and the accompanying drawings disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain the scope of the technical spirit of the present invention. . The scope of protection of the present invention should be interpreted by the claims below, and all technical spirits within the scope equivalent thereto should be interpreted as being included in the scope of the present invention.

Claims (10)

Transparent screen having a holographic optical element in the form of a film (Holographic Optical Elements);
A user information acquisition unit located on a different side from the user based on the transparent screen, and obtaining user information including a position of a user's hand through the transparent screen; And
And an image output control unit outputting an image to the transparent screen based on the user information.
The transparent screen,
A transparent element formed of a transparent material; And
Base film; And a first holographic optical element formed on the base film, the first holographic optical element including a first hologram pattern formed based on interference between multiple diverging object beams and a reference beam,
The shape of the first hologram is changed by adjusting the uniformity of light efficiency according to the distance traveled until the object light passes through the diffusion plate and reaches the first holographic optical element, and the first hologram pattern is the User recognition-based image display control system, characterized in that the shape is changed according to the state in which the reference light is transmitted through the diffusion plate or not. According to claim 1,
The user information acquisition unit acquires the user information using a three-dimensional depth camera User recognition-based image display control system. According to claim 1,
The image output control unit is a user recognition-based image display control system, characterized in that for outputting the image using a projector located on the same side as the user information acquisition unit. According to claim 1,
The transparent screen is positioned on a space above the ground by using a support structure including a first flat plate formed in a horizontal direction with respect to the ground and a second flat plate formed in a vertical direction with respect to the ground from one end surface of the first flat plate. User recognition based video display control system, characterized in that. According to claim 1,
The video display control system is a user recognition-based video display control system, characterized in that mounted on the kiosk. delete Transparent screen having a holographic optical element in the form of a film (Holographic Optical Elements);
A user information acquisition unit located on a different side from the user based on the transparent screen, and obtaining user information including a position of a user's hand through the transparent screen; And
And an image output control unit outputting an image to the transparent screen based on the user information.
The transparent screen,
A transparent element formed of a transparent material; And
Base film; And a second holographic pattern formed on the base film, the second hologram pattern formed based on interference between an object light incident on one side of the base film and a reference light incident on the other side of the base film. It includes an optical element,
The second hologram pattern is formed on the basis of the object light generated by multiple divergent light passing through a prism sheet, a lens sheet and a diffusion unit in sequence,
The second hologram pattern is formed by using the reflected light reflected by the reflector using the reflector after the object light generated by the multiple divergent lights passes through the base film,
The reflector is formed of a convex mirror array to emit the reference light,
If the distance between the diffusion unit for multi-emission of the object light and the base film is set narrow, the viewing angle is enlarged while reducing the light efficiency according to the emission angle, and the distance between the diffusion unit for multi-emission of the object light and the base film When wide is set, a user recognition based image display control system characterized in that the viewing angle is adjusted in consideration of shrinking the viewing angle while increasing light efficiency according to the divergence angle. delete delete delete

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