WO2018088706A1

WO2018088706A1 - Virtual moving lens and manufacturing method therefor

Info

Publication number: WO2018088706A1
Application number: PCT/KR2017/011387
Authority: WO
Inventors: 김학린; 박민규
Original assignee: 경북대학교 산학협력단
Priority date: 2016-11-14
Filing date: 2017-10-16
Publication date: 2018-05-17
Also published as: KR20180053936A

Abstract

The present invention relates to a virtual moving lens. The virtual moving lens comprises: a first polarization dependent lens formed so as to be driven as a lens according to a polarization direction of incident light; and a second polarization dependent lens formed so as to be driven as a lens according to a polarization direction of incident light, and stacked on the surface of the first polarization dependent lens, wherein the polarization direction in which the first polarization dependent lens is driven as a lens and the polarization direction in which the second polarization dependent lens is driven as a lens are formed to be perpendicular to each other, such that only one of the first polarization dependent lens or the second polarization dependent lens is driven as a lens according to the polarization direction of incident light. It is preferable that a valley of the first polarization dependent lens and a valley of the second polarization dependent lens are disposed to be spaced apart from each other such that a focal position moves and varies according to the polarization direction of incident light. The virtual moving lens according to the present invention is formed by stacking polarization dependent lenses, which are determined to be driven as lenses according to the polarization direction of incident light, and switches the polarization direction of incident light by using a polarization switching unit driven at a high speed according to an applied voltage, thereby enabling the focal position to vary without a physical position movement of the lens.

Description

【Specification】

[Name of invention]

Virtual moving lens and manufacturing method thereof

Technical Field

The present invention relates to a virtual moving lens and a method of manufacturing the same, and more particularly, to stack two polarization-dependent lenses in which the driving to the lens is determined according to the polarization direction of the incident light and configured to By controlling the polarization direction, the present invention relates to a virtual moving lens configured to be able to move a focal position of a micro lens array, and a manufacturing method thereof.

Background Art

Recently, interest in three-dimensional application devices using microlens arrays is increasing. Auto-stereoscopic 3D displays, which are representative examples of such 3D application devices, include mult i-view displays and integrated image displays.

In order to support both 2D and 3D images, an auto-stereoscopic 3D display device must be implemented in a form that can select 2D and 3D modes, and various techniques for implementing the same have been developed. One of these techniques is to form a lens array structure on a 2D display that is actively driven by a lens only when the viewer watches a 3D image. Representative techniques for implementing such an active lens include a method using an electrowetting effect and a method using an electro-optic effect of a liquid crystal.

Mult i-view displays can be classified into two types: parallax barriers and microlens arrays. Parallax Barrier is a structure that blocks unwanted light, which is advantageous in terms of crosstalk, but the overall brightness characteristics are not good because the light is blocked by slit. There is a problem. Mult i-view 3D Display using microlens array can realize 3D image with little brightness reduction, and when only horizontal parallax is implemented, 1D array microlens array such as lenticular lens is applied, and horizontal / vertical parallax can be realized. In this case, the 2D array microlens array is applied, and the integrated image display is also applied to the 2D array microlens array.

1 is a conceptual diagram illustrating a mult i-view 3D display. Referring to FIG. 1, it can be seen that five views are formed through a lenticular lens in a 5D 3D display.

A mult i-view 3D display with multiple views in the view zone In addition to providing binocular disparity, as the viewer moves within the view zone, different images are displayed. For example, the front of the object is seen from the front, and the side of the object is seen as the viewer moves to the side. Thus, the more views in a given view zone, the more continuous and natural motion parallax can be felt. In particular, when two or more views are formed in the pupil of a person having a size of about 2 隱, the convergence-focus mismatch problem can be solved. do. Such a 3D display is called an ultra multiview 3D display.

When viewing 3D images, the focal position adjusted by the thickness of the lens is in front of the display panel, but the position perceived by the angle between the lens of both eyes is determined by the depth information and convergence perceived by the display panel, and thus the focus. Difference in depth information causes dizziness, which is called convergence-focus mismatch (vergence 一 accommodat ion conf l ict).

However, the number of views (angular resolut ion) in a given view zone

As it increases, the resolution of the 3D image (lateral resolut ion) decreases. The resolution of the 3D image is 1/2 of the 2D display resolution in 2-view, 1/3 of the 2D display resolution in 3-view, and 1/10 of the 2D display resolution in 10-view. Therefore, the number of views (angular resolut ion) and the resolution of the 3D image (lateral resolut ion) have a trade-off relationship. The aforementioned trade-of f relationship between the angular resolut ion and the lateral resolut ion is equally applied to the 3D information acquisition process.

In previous research, the lens was moved by physical force

Although the display is implemented, the lens may be

In case of moving, it is difficult to apply the time division technology, and the problems of the system become large and the system stability is low.

[Detailed Description of the Invention]

[Technical problem]

An object of the present invention for solving the above problems is to increase the resolution of the 3D image without reducing the number of viewpoints or to increase the number of viewpoints without reducing the resolution of the 3D image, according to the polarization direction of the incident light It is to provide a virtual moving lens to move the position of.

In addition, another object of the present invention is to provide a manufacturing method of the above-described virtual moving lens.

Technical Solution

According to an aspect of the present invention, a virtual moving lens includes: a first polarization dependent lens configured to be driven by a lens according to a polarization direction of incident light; And driven by the lens according to the polarization direction of the incident light. A ^second polarization dependent lens stacked on a surface of the ^first polarization dependent lens;

The polarization direction in which the first polarization dependent lens and the second polarization dependent lens are driven by the lens is perpendicular to each other, so that only one of the first polarization dependent lens and the second polarization dependent lens is a lens according to the polarization direction of the incident light. Configured to be driven.

In the virtual moving lens according to the first feature described above, the valley of the first polarization-dependent lens and the valley of the second polarization-dependent lens are arranged to be spaced apart from each other, and the focal position is shifted and varied according to the polarization direction of the incident light. It is desirable to be.

In the virtual moving lens according to the first aspect, the system-dependent polarization dependent lens comprises: a first lens structure made of optical isotropic polymer having an inverse phase structure of the lens; A first lens made of a liquid crystalline polymer material oriented in a first direction and formed in the first lens structure; And a first RM alignment layer for alignment of liquid crystal phase polymer between the system 1 lens structure and the first lens.

The second polarization dependent lens comprises: a system two lens structure made of an optically isotropic polymer having an inverse phase structure of the lens; A second lens made of a liquid crystalline polymer oriented in a second direction perpendicular to the first direction of the system and formed in the second lens structure; And a second RM alignment film for the alignment of the liquid crystal polymer between the second lens structure and the second lens, wherein the alignment directions of the liquid crystal polymer constituting the first lens and the second lens are perpendicular to each other. It is preferable.

In the virtual moving lens according to the above-described feature 1, the virtual moving lens further comprises a polarization switching unit configured to selectively convert the polarization direction of the incident light by adjusting the applied voltage, wherein the polarization switching unit is the first polarization It is preferable to be disposed on the surface of one of the dependent lens and the second polarization dependent lens, so as to be able to control the polarization direction of the light incident thereon.

In the virtual moving lens according to the first feature described above, the first polarization dependent lens and the second polarization dependent lens are preferably composed of a lenticular lens of a one-dimensional array or a lens of a two-dimensional array.

According to a second aspect of the present invention, there is provided _a method for fabricating a virtual moving lens, comprising: ( _a ) a first lens made of a liquid crystal polymer oriented in a first direction in a first lens structure made of an optically isotropic polymer material having a reverse lens structure; Manufacturing a first polarization dependent lens; (b) manufacturing a second polarization dependent lens composed of a second lens made of a liquid crystal phase polymer oriented in a second direction in a second lens structure made of an optically isotropic polymer material having a lens reverse phase structure; (c) applying a photocurable resin to the surface of the first polarization dependent lens; (d) arranging and arranging a second polarization dependent lens on the surface coated with the photocurable resin, and then photocuring the photocurable resin to bond the first polarization dependent lens to the second polarization dependent lens; And first and second directions perpendicular to each other. It is desirable.

In the virtual moving lens manufacturing method according to the second aspect of the present invention, the virtual moving lens manufacturing method, (e) polarization switching for selecting the polarization direction of the light incident on the first polarization-dependent lens and the second polarization-dependent lens It is preferable to further comprise a step of producing a portion and placing on the surface of one of the first polarization-dependent lens and the second polarization-dependent lens.

In the virtual moving lens manufacturing method according to the second aspect of the present invention,

Step (a) comprises the steps of (al) forming an optically isotropic polymer layer on the substrate; (a2) imprinting a lens-shaped stamp on the optically cylindrical polymer layer and photocuring to complete a first lens structure having a lens reverse phase structure on an upper surface of the optically isotropic polymer layer; 3) forming an RM alignment layer on the imprinted surface of the first lens structure to align the liquid crystal phase polymer in the first direction and rubbing along the system 1 direction; (a4) covering the film substrate having an additional RM alignment layer formed on top of the first lens structure; (a5) injecting and curing the liquid crystal phase polymer into the first lens structure formed by the RM alignment layer and the additional RM alignment layer, thereby forming a first lens comprising a lens-shaped liquid crystal phase polymer; (a6) separating and removing the film substrate on which the additional RM alignment layer is formed; preferably, manufacturing a first polarization dependent lens.

In the method of manufacturing a virtual moving lens according to the second aspect of the present invention, the step (a3) may include hydrophilicity after UV ozone treatment on the imprinted surface of the first lens structure having the reverse lens structure. It is preferable to form an RM alignment film on the ized surface.

In the virtual moving lens manufacturing method according to the second aspect of the present invention, the step (d) is preferably aligned so that the valley of the first polarization-dependent lens and the valley of the second polarization-dependent lens are spaced apart from each other.

【Effects of the Invention】

The virtual moving lens according to the present invention stacks two polarization-dependent lenses in which driving to the lens is determined according to the polarization direction of incident light, thereby switching the polarization direction of the incident light without physically moving the lens, thereby shifting the focus position. You can move the.

In addition, the virtual moving lens according to the present invention may adopt a time-division technique by field swirling by introducing a polarization switching element capable of high speed driving. Accordingly, the virtual moving lens according to the present invention can increase the resolution of a 3D image without decreasing the number of viewpoints or increase the number of viewpoints without decreasing the resolution of the 3D image with time division technology.

In addition, the virtual moving lens according to the present invention comprises a lens using a photocurable liquid crystal phase polymer, unlike a lens using a conventional liquid crystal, a liquid crystal phase After curing the polymer by photocuring, it is possible to remove all the films used as the substrate. As a result, it is possible to minimize the separation gap Gap between the first polarization dependent lens and the second polarization dependent lens that are stacked on each other. Thus, it is possible to minimize the problem that the position where the focus is formed by each lens is changed by the gap between each lens.

[Brief Description of Drawings]

1 is a conceptual diagram illustrating a mul t- view 3D display. 2 is a conceptual diagram illustrating a configuration and operation principle of a polarization dependent lens used in a virtual moving lens according to an exemplary embodiment of the present invention. 3 is a conceptual diagram illustrating the structure and operation principle of a virtual moving lens according to an exemplary embodiment of the present invention.

4 is a conceptual diagram illustrating an image of a focal point of a lens when a virtual moving lens according to a preferred embodiment of the present invention is configured as a two-dimensional array of square shapes.

FIG. 5 is a conceptual diagram illustrating an image of a focal point of a lens when a virtual moving lens according to an exemplary embodiment of the present invention is configured as a 2D array lens having a 2D hexagonal shape.

FIG. 6 shows microscope images observed on a crossed polarizer for a microlens array of a polarization dependent 2D hexagonal array in a virtual moving lens according to a preferred embodiment of the present invention.

FIG. 7 illustrates a focusing beam image according to polarization of incident light when the first and second polarization dependent lenses are composed of 1D lenticular lenses in a virtual moving lens according to an exemplary embodiment of the present invention. .

FIG. 8 illustrates a focusing beam image according to polarization of incident light when the first and second polarization dependent lenses are composed of 2D hexagonal array structures in a virtual moving lens according to an exemplary embodiment of the present invention. .

FIG. 9 illustrates an image captured in an image plane according to polarization of incident light when the first and second polarization dependent lenses are configured in a 2D hexagonal array structure in a virtual moving lens according to an exemplary embodiment of the present invention.

FIG. 10 is a flowchart sequentially illustrating a process of manufacturing a first or second polarization dependent lens in a method of manufacturing a virtual moving lens according to an exemplary embodiment of the present invention.

FIG. 11 is a flowchart sequentially illustrating a process of completing the virtual moving lens by combining the first and the second polarization dependent lenses in the method of manufacturing the virtual moving lens according to the preferred embodiment of the present invention.

[Best form for implementation of the invention] The virtual moving lens according to the present invention is constructed by stacking polarization-dependent lenses in which driving to a lens is determined according to a polarization direction of incident light, and uses a polarization switching unit that is driven at a high speed according to an applied voltage. By switching the, the focus position can be changed without moving the physical position of the lens.

Hereinafter, the configuration and operation of a virtual moving lens according to an exemplary embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2 is a conceptual diagram illustrating a configuration and operation principle of a polarization dependent lens used in a virtual moving lens according to an exemplary embodiment of the present invention. Referring to FIG. 2, the polarization dependent lens 20 includes a lens structure 200 having a reverse phase structure of a microlens and a lens made of a liquid crystal polymer (React ive Mesogen; 'RM') filling the inside of the lens structure ( 210, and the liquid crystal phase polymer is oriented in one direction of the microlenses, and has a structure in which the lens is silver (On) / off (Off) according to the polarization direction of incident light. Generally, the rod-like liquid crystal polymer has birefringence characteristics, the refractive index in the major axis direction of the liquid crystal polymer is, and the refractive index in the minor axis direction is n ₀ . Therefore, the refractive index of the liquid crystal phase polymer is determined to be one of n _e and n ₀ depending on the polarization direction of the incident light. On the other hand, the lens structure 200 is composed of an optically isotropic polymer, the refractive index is ¾ and n _P coincides with the refractive index n _{0 in the} axial direction of the RM.

As shown in FIG. 2A, when the polarization direction incident in the ON state where the voltage is applied to the polarization switching unit 22 coincides with the short axis direction, the refractive index of RM is n ₀ , which is the refractive index η _ρ of the lens structure. The lens function disappears. On the other hand, as shown in (b) of FIG. 2, when the polarization direction incident in the OFF state where no voltage is applied to the polarization switching unit 22 coincides with the major axis direction, the refractive index of RM is n _e , which is the lens structure refractive index. n _{p is} inconsistent with the lens.

3 is a conceptual diagram illustrating the structure and operation principle of a virtual moving lens according to an exemplary embodiment of the present invention.

3, the virtual movement according to the preferred embodiment of the present invention

The lens 30 includes a first polarization dependent lens 300, a second polarization dependent lens 310, and a polarization switching unit 320. In the virtual moving lens according to the present invention, the polarization switching unit 320 may be integrally formed with the first and second polarization dependent lenses or may be manufactured separately from the first and second polarization dependent lenses. However, in the present invention, for convenience of description, the first and second polarization dependent lenses and the polarization switching unit will be described on the basis of being integrated.

The first polarization dependent lens 300 and the second polarization dependent lens 310 are configured to be driven by a lens according to the polarization direction of incident light, and the first polarization dependent lens and the second polarization dependent lens are incident light. According to the polarization direction of only one of the first polarization-dependent lens and the second polarization dependent lens to drive the lens The focus position is shifted and varied according to the polarization direction of the incident light. Preferably, the valley of the first polarization dependent lens and the valley of the second polarization dependent lens are disposed to be spaced apart from each other.

The first polarization dependent lens 300 has a first lens structure 302 and a first lens 304. The first lens structure 302 is made of an optically isotropic polymer and consists of an inverted form of microlenses. The first lens 304 is made of a liquid crystalline polymer (React ive Mesogen) oriented in the system 1 direction and is formed in the lens 1 lens structure.

The second polarization dependent lens 310 includes a second lens structure 312 and a second lens 314 and has the same structure as that of the first polarization dependent lens, and includes the alignment direction of the liquid crystal phase polymer of the low 12 lens. The alignment direction of the liquid crystal phase polymer of the first lens is disposed to be perpendicular to each other.

The first polarization dependent lens further comprises a first RM alignment layer for the alignment of the liquid crystal phase polymer between the first lens structure and the first lens, wherein the second polarization dependent lens comprises: the second lens structure and the first lens structure; It is preferable to further provide a 2nd RM alignment film for orientation of a liquid crystalline polymer between two lenses.

The first polarization-dependent lens and the second polarization-dependent lens are stacked on each other, and as shown in FIG. 3, the RM plane of the first lens and the RM plane of the second lens are laminated so as to be in contact with each other, or the first lens. The RM surface of the first lens structure and the isotropic polymer surface of the second lens structure are laminated so as to be in contact, or the isotropic polymer surface of the first lens structure and the RM surface of the second lens It is also possible to laminate so that the isotropic polymer surface of a 2nd lens structure contact | connects.

In addition, the virtual moving lens according to the present invention may be made of a photocurable liquid crystal polymer, thereby curing the liquid crystal polymer to solidify the film to a film state, and then removing the substrate. As a result, between the first and second polarization dependent lenses It is possible to minimize the gap (Gap) of the. If the lens is made of liquid crystal, the substrate cannot be removed so that a gap exists between the first and second polarization dependent lenses. If the gap between the stacked first and second polarization dependent lenses is not minimized, a problem arises in that the position where the focus is formed by each lens is changed. Therefore, the virtual moving lens according to the present invention is a photocurable liquid crystal phase polymer

By using this, after the photocuring, the liquid crystal phase polymer may be solidified to remove the upper film used as the substrate, thereby minimizing the gap between the first and second polarization dependent lenses.

The polarization switching unit 320 selectively converts the polarization direction of the incident light according to the applied voltage and outputs the incident light to the first polarization dependent lens or the second polarization dependent lens. The polarization switching unit may be disposed on a surface of one of the first polarization dependent lens and the second polarization dependent lens to control the polarization direction of the light incident thereto. Referring to FIG. 3), when the polarization of light incident to the virtual moving lens by the polarization switching unit 320 is in the Y-axis direction, the second lens 314 may have a refractive index of n ₀ in the second polarization dependent lens. The refractive index between the second lens 314 and the second lens structure 312 is matched so that light travels without refraction. In the first polarization-dependent lens 300, the first lens 304 reduces the refractive index of n _p . The refractive index between the first lens 304 and the first lens structure 302 is inconsistent such that light is refracted.

Referring to FIG. 3B, when the polarization of the light incident by the polarization switching unit 320 into the virtual moving lens is in the X-axis direction, the second lens 314 is formed of n _P in the second polarization dependent lens. Since the refractive index between the second lens 314 and the second lens structure 312 does not match, the light is refracted and proceeds. In the first polarization dependent lens 300, the first lens 304 is formed of n ₀ . The refractive index is such that the refractive index between the first lens 304 and the first lens structure 302 coincide so that light travels without refraction. On the other hand, since the liquid crystal phase polymer of the first polarization dependent lens and the liquid crystal phase polymer of the second polarization dependent lens are oriented in the vertical direction to each other, the first polarization dependent lens and the second polarization dependent lens are dependent on the polarization direction of the incident light. Only one of the lenses is driven by the lens. In addition, since the valley of the first polarization-dependent lens and the valley of the second polarization-dependent lens are arranged to be spaced apart from each other, the position of the focal point of the virtual moving lens is shifted according to the lens driven by the polarization direction of the incident light. ^'

The first polarization dependent lens and the second polarization dependent lens may be configured as a lenticular lens in a one-dimensional array, or may be configured as a lens in a two-dimensional array having a rectangular or hexagonal shape. In particular, in the case of a two-dimensional array of lenses, it is possible to move in the X-axis direction, the Y-axis direction, or the diagonal direction depending on the alignment direction of the first and second polarization dependent lenses. .

The disposition position of the first polarization dependent lens and the second polarization dependent lens may be determined according to the direction of movement of the focus required in the system. As shown in FIG. 4 and FIG. 5, it can be seen that the moving direction of the focus varies according to the arrangement positions of the first polarization dependent lens and the second polarization dependent lens.

FIG. 4 is a conceptual diagram illustrating an image of a focal point of a lens when a virtual moving lens according to an exemplary embodiment of the present invention is configured as a two-dimensional array of square shapes. FIG. 4A illustrates a case where the two-dimensional array of square-shaped lenses are disposed at a reference position, and FIG. 4B illustrates a case where the first polarization dependent lens is moved in the horizontal direction at the reference position of (a). (D) shows the focus images when the first polarization dependent lens is moved in the diagonal direction, respectively.

FIG. 5 is a conceptual diagram illustrating an image of a focal point of a lens when a virtual moving lens according to an exemplary embodiment of the present invention is configured as a 2D array lens having a 2D hexagonal shape. (A) of FIG. 5 shows that when the lenses of the two-dimensional array of the hexagonal shape are arranged at the reference position, (b) is the first polarization dependent type at the reference position of (a). When the lens is moved in the horizontal or vertical direction, (c) shows the focus images when the first polarization dependent lens is moved in the diagonal direction, respectively.

FIG. 6 illustrates microscope images observed on a crossed polarizer for a microlens array of a polarization dependent 2D hexagonal array in a virtual moving lens according to a preferred embodiment of the present invention. 6 (a) shows a dark state because retardat ions do not occur when the polarization direction (P) and the alignment direction (R) coincide. FIG. 6 (b) shows the polarization direction (P) and the orientation direction. When (R) is 45 degrees to each other

As retardat ions are generated, light leaks, and the height is changed by the lens structure, the amount of retardat ions varies depending on the position, thereby forming a concentric circle pattern. FIG. 7 illustrates a focusing beam image according to polarization of incident light when the first and second polarization dependent lenses are configured as 1D lenticular lenses in a virtual moving lens according to an exemplary embodiment of the present invention. 7 (a) shows that the polarized light in the X-axis direction is incident and focused by the second polarization dependent lens.

As an image, the first polarization-dependent lens does not cause refraction due to refractive index matching between the first lens and the first lens structure. FIG. 7B shows polarized light in the Y-axis direction incident to the system of the first polarization-dependent lens. As a focused image, the second polarization dependent lens does not cause refraction due to refractive index matching of the second lens and the second lens structure.

FIG. 8 illustrates a focusing beam image according to polarization of incident light when the first and second polarization dependent lenses are configured as a 2D hexagonal array structure in a virtual moving lens according to an exemplary embodiment of the present invention. . FIG. 8A is an image in which polarized light in the X-axis direction is incident and focused by the second polarization dependent lens, and FIG. 8B is an image in which polarized light in the 45-degree direction is incident from the focal plane. 8C illustrates an image in which polarized light in the Y-axis direction is incident and focused by the first polarization dependent lens. Referring to FIG. 8B, since the X-axis polarization component and the Y-axis polarization component exist at a ratio of 1: 1 in the case of 45 degree polarization, the X-axis polarization component is focused by the second polarization dependent lens and Y It can be seen that the axial polarization component is focused by the first polarization dependent lens so that both the focus focused by the two polarization dependent lenses is observed, but the intensity is reduced in half.

The lens structures used in FIGS. 7 to 8 are 1D array microlenses having a period of 150 and a height of 3m, and 2D hexagonal arrays having a period of 28m and a height of 25, respectively.

FIG. 9 illustrates an image captured in an image plane according to polarization of incident light when the first and second polarization dependent lenses are configured as a 2D hexagonal array structure in a virtual moving lens according to an exemplary embodiment of the present invention. 9

For reference, it can be seen that the microlens is virtually moved according to the incident polarization to move the captured image. Hereinafter, a manufacturing method of a virtual moving lens according to an exemplary embodiment of the present invention will be described in detail with reference to FIGS. 10 and 11.

According to a preferred embodiment of the present invention, a method of manufacturing a virtual moving lens may include manufacturing and aligning first and second polarization dependent lenses, and then coating and aligning a photocurable resin on surfaces abutting the first and second polarization dependent lenses. Thereafter, photocuring is performed to bond the first and second polarization dependent lenses together.

FIG. 10 is a flowchart sequentially illustrating a process of manufacturing a first and a second polarization dependent lens in a method of manufacturing a virtual moving lens according to an exemplary embodiment of the present invention. Referring to FIG. 10, first, a photocurable isotropic polymer material 410 is coated on a film substrate 400, followed by imprinting a stamp 420 having a microlens structure, followed by photocuring to form a microlens made of an isotropic polymer material. The lens structure 412 of the reversed phase structure is completed (a, b, c in FIG. 10). As the photocurable isotropic polymer material, N0A65 ^™ product having a refractive index of 1.524 of Normand Corporation may be used. Next, on the surface of the lens structure of the microlens reversed-phase structure

Polyvinylachol (PVA) is applied to a thickness of about 200nm and then rubbed according to the alignment direction required for the system to complete the RM alignment layer 430, which is used to align the liquid crystal phase polymer injected in the post process in a bottom-up manner. (Degrees

10 d and e). As the alignment film in the manufacturing method according to the present invention, a low temperature process of about 90-100 ° C. is possible, and PVA dissolved in a polar solvent such as DI water is preferably used. In general, a polyimide ('ΡΓ) is used for the liquid crystal alignment, and the polyimide requires a high-silver heat treatment of about 230 to 250 ° C. in order to perform polymer izat ion. Is difficult.

On the other hand, in order to improve the coating property of PVA, it is preferable to hydrophilize the surface allol having a lens reverse phase structure by UV ozone treatment.

Next, after forming an additional RM alignment layer 440 on the film substrate 442, it is disposed on the upper surface of the lens structure, which is used to orient the liquid crystal phase polymer injected in the post-process in a top-down manner (F of FIG. 10). Also in this case, in order to improve the coating property of PVA, it is preferable to carry out UV ozone treatment of the film substrate 442, and to make a surface hydrophilic.

Next, photo-polymerization at 35 ⁰ C after the heat treatment for 30 minutes at temperature and then injected into the photo-curable between the liquid crystal of the RM alignment film 430 gwachu of RM alignment film 440 of the lens structure polymer at 70 ^o C temperature 50 ° C To complete the lens 450 (Fig. 10G).

Next, the film substrate 442 and the additional RM alignment layer 440 are separated and removed to complete the first polarization dependent lens including the lens structure 412, the RM alignment layer 430, and the lens 450 (FIG. 10). H of i). Second polarization dependent type through the same process The lens is also completed, except that the alignment direction of the liquid crystal phase polymer of the second polarization dependent lens is perpendicular to the alignment direction of the liquid crystal phase polymer of the first polarization dependent lens.

The method may further include removing the lower substrate after completing the first and second polarization dependent lenses.

When the first and second polarization dependent lenses are completed by the above-described process, they are combined to complete the virtual moving lens. FIG. 11 is a flowchart sequentially illustrating a process of completing a virtual moving lens by adhering a first and a second polarization dependent lens in a method of manufacturing a virtual moving lens according to an exemplary embodiment of the present invention.

Referring to FIG. 11, first, a UV curable resin 480 is applied to an adhesive surface of one of the first and system 2 polarization dependent lenses 460 and 462 (FIG. 11 a), and the first And aligning the second polarization dependent lenses 460 and 462 (b of FIG. 11), followed by photocuring to bond the first and second polarization dependent lenses (FIG. 11 c). In aligning the first and second polarization dependent lenses, the first and second polarization dependent lenses of the first polarization dependent lens are removed by removing all of the substrate films on the upper and lower surfaces of the first and second polarization dependent lenses. The second lens of the first polarization-dependent lens or the first lens structure of the first polarization-dependent lens and the second lens structure of the second polarization-dependent lens And the second lens structure of the second polarization dependent lens to abut each other.

The first lens structure of the second polarization dependent lens and the second lens of the second polarization dependent lens may be bonded to each other.

In the above, with reference to the preferred embodiment of the present invention

Although described, this is merely an example and does not limit the present invention, those skilled in the art to which the present invention belongs without departing from the essential features of the present invention without departing from the various features and modifications of the above various You will see that this is possible. And differences relating to such modifications and applications will be construed as being included in the scope of the invention defined in the appended claims.

Industrial Applicability

The virtual moving lens according to the present invention can be used for a multiview 3D display.

Claims

[Range of request]

[Claim 1]

A first polarization dependent lens configured to be driven by the lens according to the polarization direction of the incident light; And

A second polarization dependent lens configured to be driven by a lens according to a polarization direction of incident light, and laminated on a surface of the first polarization dependent lens;

And a polarization direction in which the first polarization dependent lens is driven by a lens and a polarization direction in which the second polarization dependent lens is driven by a lens are perpendicular to each other, and according to the polarization direction of incident light, the first polarization A virtual moving lens, characterized in that only one of the dependent lens and the low 12 polarization dependent lens is driven by the lens.

[Claim 2]

The virtual movement of claim 1, wherein the valleys of the first polarization-dependent lens and the valleys of the second polarization-dependent lens are arranged to be spaced apart from each other, and the focal position is shifted and varied according to the polarization direction of the incident light. lens.

[Claim 3]

According to claim 1, wherein the system 1 polarization dependent lens

A first lens structure made of an optically isotropic polymer having an inverse phase structure of the lens; And

A system 1 lens made of a liquid crystalline polymer material oriented in a system 1 direction and formed in the first lens structure;

The second polarization dependent lens,

A second lens structure made of an optically isotropic polymer having an inverse phase structure of the lens; And

A second lens made of a liquid crystalline polymer oriented in a second direction perpendicular to the first direction and formed in the second lens structure; And

The alignment direction of the liquid crystal phase polymer constituting the first lens and the second lens is perpendicular to each other.

[Claim 4]

The lens of claim 3, wherein the first polarization dependent lens further comprises a first RM alignment layer for the alignment of liquid crystal phase polymer between the first lens structure and the first lens, wherein the second polarization dependent lens comprises: the first polarization dependent lens; And a second RM alignment film for alignment of the liquid crystal phase polymer between the two lens structures and the second lens.

[Claim 5]

The method of claim 1, wherein the virtual moving lens

Further comprising a polarization switching unit configured to selectively convert the polarization direction of the incident light by adjusting the applied voltage,

And the polarization switching unit is disposed on a surface of one of the first polarization dependent lens and the second polarization dependent lens to control the polarization direction of light incident thereto.

[Claim 6]

6. The virtual device according to any one of claims 1 to 5, wherein the first polarization dependent lens and the second polarization dependent lens are composed of a lenticular lens in a one-dimensional array or a lens in a two-dimensional array. Moving lens.

[Claim 7]

(a) manufacturing a first polarization dependent lens composed of a first lens composed of a liquid crystalline polymer oriented in a first direction in a system one lens structure composed of an optically circular polymer material having a lens reverse phase structure;

(b) fabricating a second polarization dependent lens composed of a second lens composed of a liquid crystalline polymer oriented in a second direction in a twelfth lens structure composed of an optically isotropic polymer material having a lens reverse phase structure;

(c) applying a photocurable resin to the surface of the crater 1 polarization dependent lens;

(d) arranging and arranging a second polarization dependent lens on the surface to which the photocurable resin is applied, and then bonding the first polarization dependent lens to the _second polarization dependent lens by photocuring the photocurable resin;

And a first direction and a second direction are perpendicular to each other.

[Claim 8]

The method of claim 7, wherein the virtual moving lens manufacturing method

(e) manufacturing a polarization switching unit for selecting a polarization direction of light incident on the first polarization dependent lens and the second polarization dependent lens and disposing the polarization switching unit on a surface of one of the first polarization dependent lens and the second polarization dependent lens; Method of manufacturing a virtual moving lens, characterized in that it further comprises.

[Claim 9]

The method of claim 7, wherein the step (a),

(al) forming an optically isotropic polymer layer on the substrate;

(a2) imprinting a lens-shaped ramp on the optically isotropic polymer layer Photocuring to complete a first lens structure having a lens reverse phase structure on an upper surface of the optically isotropic polymer layer;

(a3) forming an RM alignment layer on the imprinted surface of the first lens structure to align the liquid crystal phase polymer in the first direction and rubbing along the first direction;

(a4) covering the film substrate on which the additional rubbed RM alignment layer is formed on top of the first lens structure;

(a5) injecting and curing the liquid crystal phase polymer into the first lens structure formed by the RM alignment layer and the additional RM alignment layer to form a first lens made of a lens-like liquid crystal phase polymer;

(a6) separating and removing the film substrate on which the additional RM alignment layer is formed;

And a first polarization dependent lens to manufacture a virtual moving lens.

[Claim 10]

The method of claim 9, wherein step (a3) comprises:

A method of fabricating a virtual moving lens, characterized in that an imprinted surface of a first lens structure having a reverse lens structure is subjected to UV ozone treatment to be hydrophilized to form an RM alignment layer on the hydrophilized surface.

[Claim 111]

The method of claim 7, wherein step (d) comprises arranging the valleys of the first polarization-dependent lens and the valleys of the second polarization-dependent lens to be spaced apart from each other.

[Claim 12]

20. The method of claim 19, further comprising removing the substrate after completing the first polarization dependent lens.

[Claim 13]

The method of claim 7, wherein step (d),

The liquid crystal phase polymer (RM) surface of the low U polarization dependent lens and the M surface of the second polarization dependent lens are bonded to each other,

Bonding the isotropic polymer surface of the first polarization dependent lens and the isotropic polymer surface of the second polarization dependent lens to be in contact with each other;

M surface of the first polarization dependent lens and the isotropic polymer surface of the second polarization dependent lens are bonded to each other,

Of the isotropic polymer surface of the first polarization dependent lens and the second polarization dependent lens Method of manufacturing a virtual moving lens characterized in that the RM surface is bonded to abut each other