WO2014204228A1 - 2d/3d switching lens for 3d image display device - Google Patents

Abstract

The present invention provides a 2D/3D switching lens characterized by comprising: a top plate including an upper substrate, an upper transparent electrode formed on the bottom surface of the upper substrate, and a reticular lens unit having a plurality of reticular lenses disposed in parallel in intersecting directions and formed on the bottom surface of the upper transparent electrode; a bottom plate including a lower substrate, a lower transparent electrode formed on the top surface of the lower substrate, and a lower orientation film formed on the top surface of the lower transparent electrode; and a liquid crystal layer included between the top plate and the lower plate and driven by an electric field applied by the upper transparent electrode and the lower transparent electrode, wherein a black matrix for preventing crosstalk due to light diffraction is formed on the bottom of the portions connecting one reticular lens to another.

Description

2D / 3D switching lens for stereoscopic display

The present invention relates to a 2D / 3D switching lens used in a stereoscopic image display device.

Stereoscopic displays usually provide the viewer with images with parallax from individual left and right eye viewpoints. There are two ways to provide parallax images in both eyes of the observer.

The first method uses a pair of shutters or 3D glasses that transmit or block light toward the viewer's eyes by alternating and synchronizing the left and right image displays.

In the second method, similarly to the above, the viewpoints of the right eye and the left eye are alternately displayed in each eye of the observer, but 3D glasses are not used. This second method is called autostereoscopic and is preferred for stereoscopic 3D viewing because no extra glasses are needed.

In the parallax barrier method, thin vertical slits are arranged at regular intervals in order to transmit or block light, and the left and right images can be precisely separated from each other to realize a 3D image. The parallax barrier method causes brightness deterioration due to the barrier, difficulty in manufacturing, and diffraction problems.

In the lenticular lens method, as shown in FIG. 1, the lenticular lens 1 is positioned between the display panel 2 and the viewer. The lenticular lens 1 changes the path (that is, the optical path) of the right eye image and the left eye image displayed on the display panel 2 so that the right eye image and the left eye image are projected by the viewer's right eye and left eye, respectively. . The lenticular lens method has a disadvantage in that crosstalk occurs due to diffraction of a signal transmitted through the lenticule and recognized by a viewer.

Korean Patent Laid-Open Publication No. 10-2010-0041698 discloses an aperture opening correction for a lenticular screen for applying an opaque material to the lenticular screen in order to prevent crosstalk due to such diffraction. However, the technique requires a separate lenticular screen to apply the impermeable material, and has the disadvantage of complicating the formation of the lenticular lens.

On the other hand, the lenticular lens method is advantageous in view angle and luminance when the display is enlarged compared to the parallax barrier method. However, the lenticular lens method uses more liquid crystals than the parallax barrier method, and as the size of the display increases, the thickness of the lens becomes thicker, thereby increasing the amount of liquid crystals used and the alignment of the liquid crystals. Therefore, while maintaining the performance of the conventional lenticular lens, a high degree of orientation is required with a small amount of liquid crystal is required.

The present invention has been made to solve the above problems of the prior art, to provide a 2D / 3D switching lens that can effectively prevent crosstalk due to the diffraction of the signal generated in the lenticular lens system. The purpose.

In addition, an object of the present invention is to provide a 2D / 3D switching lens in which the thickness of the liquid crystal layer is thin and thus the amount of liquid crystal used can be reduced, thereby reducing the cost and improving liquid crystal alignment.

The present invention,

An upper plate including an upper substrate, an upper transparent electrode formed on a lower surface of the upper substrate, and a lenticular lens portion in which a plurality of lenticular lenses formed on a lower surface of the upper transparent electrode are disposed in parallel in a lateral direction;

A lower plate including a lower substrate, a lower transparent electrode formed on an upper surface of the lower substrate, and a lower alignment layer formed on an upper surface of the lower transparent electrode; And

A liquid crystal layer included between the upper plate and the lower plate and driven by an electric field applied by the upper transparent electrode and the lower transparent electrode;

It provides a 2D / 3D switching lens, characterized in that the black matrix is formed under the connection portion of each of the lenticular lens and the lenticular lens.

The 2D / 3D switching lens may have a feature in which the black matrix is formed on the lower alignment layer.

The 2D / 3D switching lens may have the black matrix formed on a lower surface of the lower substrate.

The 2D / 3D switching lens may have a feature that the black matrix is coupled by adhesion with a tip of a connecting portion of the lenticular lens and the lenticular lens.

The 2D / 3D switching lens may have a feature that the black matrix includes an adhesive component.

The 2D / 3D switching lens may have a feature that an alignment layer is formed on an inner curved surface of each lenticular lens included in the lenticular lens unit.

In addition, the present invention,

An upper plate including a Fresnel lens portion on a first film and a lower surface of the first film, the plurality of Fresnel lenses arranged in parallel in a lateral direction;

A lower plate including a second film and a lower alignment layer formed on an upper surface of the second film; And

It provides a 2D / 3D switching lens comprising a liquid crystal layer between the upper plate and the lower plate.

The 2D / 3D switching lens may have a feature that an alignment layer is formed on a lower curved surface of the Fresnel lens unit.

The 2D / 3D switching lens further includes a first transparent electrode between the bottom surface of the first film and the top surface of the Fresnel lens portion; A second transparent electrode may be further provided between the upper surface of the second film and the lower alignment layer.

The 2D / 3D switching lens may have a characteristic that the liquid crystal contained in the liquid crystal layer is a cured reactive liquid crystal.

The 2D / 3D switching lens has a polarization switching unit coupled to a lower plate, and the polarization switching unit

A top plate including a third film, a first electrode formed on the bottom surface of the third film, and an upper alignment layer formed on the bottom surface of the first electrode;

A lower plate including a fourth film, a second electrode formed on the top surface of the fourth film, and a lower alignment layer formed on the top surface of the second electrode; And

It may have a feature including a liquid crystal layer between the upper plate and the lower plate.

In the 2D / 3D switching lens, the Fresnel lens is formed by the Flennel lens pattern of the resin layer formed on the lower surface of the first film, the black matrix is formed under the tip portion of the Fresnel lens pattern. Can have

In the 2D / 3D switching lens, the Fresnel lens is formed by a planar lens pattern of the resin layer formed on the bottom surface of the first transparent electrode, the black matrix is formed below the tip of the Fresnel lens pattern. Can have

In the 2D / 3D switching lens, the black matrix may be formed on the lower alignment layer.

In the 2D / 3D switching lens, the black matrix may have a feature formed on a lower surface of the lower substrate.

In the 2D / 3D switching lens, the black matrix may be coupled to the tip of the Fresnel lens pattern by adhesion.

In the 2D / 3D switching lens, the black matrix may include an adhesive component.

In the 2D / 3D switching lens of the present invention, since a black matrix is formed below the connecting portion of the lenticular lens and the lenticular lens, crosstalk due to diffraction of light is prevented, thereby providing a clearer stereoscopic image.

 In addition, when the black matrix is formed on the alignment layer and bonded by the tip of the lenticular lens and the connecting portion of the lenticular lens by adhesion, the black matrix provides an effect of preventing the lenticular lens from being lifted by thermal or mechanical force.

In addition, the 2D / 3D switching lens of the present invention includes a Fresnel lens portion under the first film in contact with the liquid crystal, so that the thickness of the liquid crystal layer becomes thin, thereby reducing the amount of liquid crystal used, thereby reducing the cost and improving the liquid crystal orientation. To provide.

1 is a view showing an implementation principle of a stereoscopic image by a lenticular lens.

2 is an exploded perspective view showing the structure of a 2D / 3D switching lens of the present invention.

3 and 4 are exploded perspective views showing an example of the 2D / 3D switching lens of the present invention.

5 to 6 are cross-sectional views showing the structure of a conventional 2D / 3D switching lens.

7 to 8 are cross-sectional views showing an example of the 2D / 3D switching lens of the present invention.

9 and 10 are cross-sectional views showing an example of the 2D / 3D switching lens of the present invention in which a black matrix is formed.

11A and 11B show a conceptual diagram A of a Fresnel lens and a structure B of a Fresnel lens.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention. Prior to describing the present invention, if it is determined that a detailed description of related known functions and configurations may unnecessarily obscure the subject matter of the present invention, the description thereof will be omitted. In addition, in the following examples, individual components and functions may be generally selected unless explicitly required, and the order of the processes may be changed. Portions and features of some embodiments may be included in, or replaced by, other embodiments.

2 is an exploded perspective view showing the structure of a 2D / 3D switching lens of the present invention. 3 and 4 are exploded perspective views showing an example of the 2D / 3D switching lens of the present invention.

As shown in Figures 2 to 4, the present invention is the upper substrate 111, the upper transparent electrode 112 formed on the lower surface of the upper substrate and the plurality of lenticular lenses formed on the lower surface of the upper transparent electrode in the transverse direction An upper plate 110 including a lenticular lens unit 113 disposed in parallel;

A lower plate 120 including a lower substrate 121, a lower transparent electrode 122 formed on an upper surface of the lower substrate, and a lower alignment layer 123 formed on an upper surface of the lower transparent electrode; And

A liquid crystal layer (140) included between the upper plate (110) and the lower plate (120) and driven by an electric field applied by the upper transparent electrode (112) and the lower transparent electrode (122);

A black matrix 150 is formed under the connection portion of each of the lenticular lens and the lenticular lens to prevent crosstalk due to diffraction of light, thereby providing a 2D / 3D switching lens.

As shown in FIG. 3, the black matrix 150 may be formed on the lower alignment layer 123.

When the black matrix 150 is formed at the position as described above, the tip of the connecting portion of the lenticular lens and the lenticular lens may be bonded to the black matrix 150 by adhesion. In this case, the effect of preventing the lifting of the lenticular lens by heat or mechanical force can be obtained.

The bond may be formed by including an adhesive component in the black matrix, applying an adhesive to the upper end of the black matrix, or applying an adhesive to the tip of the connecting portion.

In addition, the black matrix 150 may be formed on the bottom surface of the lower substrate 121, as shown in FIG. 4.

The connection part of the lenticular lens and the lenticular lens in the above means a part where individual lenticular lenses are connected when the tunnel-shaped lens is viewed as an individual lenticular lens, and the parts formed in this connection form a sharp tip. It is referred to as "tip" in the present invention because it has.

 In the present invention, the black matrix 150 is formed at the lower portion of the connection portion of each lenticular lens and the lenticular lens to prevent crosstalk due to diffraction of light, and as illustrated in FIGS. 3 and 4. Is formed.

In the present invention, an upper alignment layer may be further formed on the inner curved surface of each lenticular lens included in the lenticular lens unit. However, such an alignment film is not essential. This is because the alignment of the liquid crystal may be possible only by rubbing the inner curved surface.

In the present invention, the display device 130 is a liquid crystal display (LCD), a field emission display (FED), a plasma display panel (PDP) and an organic light emitting diode (Organic Light) Flat panel display devices such as an Emitting Diode).

The 2D / 3D switching lens of the present invention includes an upper plate 110 and a lower plate 120 facing each other with an electrically controllable liquid crystal layer therebetween, so that the light from the display device 130 is transmitted in the 2D image mode as it is. In the 3D image mode, the light is refracted from the display device 130 to serve as an optical controller for separating the path of the light corresponding to the left eye image and the path of the light corresponding to the right eye image.

In the present invention, materials such as upper and lower substrates, upper and lower transparent electrodes, lenticular lenses, liquid crystals, alignment layers, and black matrices, and methods of constructing 2D / 3D switching lenses using them are not particularly limited, and techniques known in the art are used. Applicable

5 and 6 are perspective views showing the structure of a conventional 2D / 3D switching lens. As shown in FIG. 5 and FIG. 6, the conventional 2D / 3D switching lens is bonded by the display panel 300 and the pressure-sensitive adhesive layer 400.

The 2D / 3D switching lens 200 of the present invention includes an upper plate 210 and a lower plate 220 bonded to each other.

The upper plate 210 may include a first film 211, a first transparent electrode 212 formed on a bottom surface of the first film 211, a resin layer 213 formed on a bottom surface of the first transparent electrode 212, An upper alignment layer 214 formed on the bottom surface of the resin layer and a liquid crystal 215 in contact with the upper alignment layer 214.

The resin layer 213 has a plurality of lenticular lens patterns. The lower plate 220 includes a second film 221, a second transparent electrode 222 formed on an upper surface of the second film 221, and a lower alignment layer 223 formed on an upper surface of the second transparent electrode 222. It includes.

The upper plate 210 and the lower plate 220 are bonded to each other through a laminating process such that the liquid crystal 215 of the upper plate 210 and the lower alignment layer 223 of the lower plate 220 are in direct contact with each other.

In addition, the conventional 2D / 3D switching lens, as shown in FIG. 6, the upper plate 210, the lower plate 220 bonded to the upper plate 210, the polarization switching unit 230, and the lower plate 220. And an adhesive layer 240 between the polarization switching unit 230.

The upper plate 210 may include a first film 211, a resin layer 213 formed on the bottom surface of the first film 211, an upper alignment layer 214 formed on the bottom surface of the resin layer, and the upper alignment layer 214. And cured reactive mesogen 216 in contact with it. The resin layer 213 has a plurality of lenticular lens patterns.

The lower plate 220 includes a second film 221 and an upper alignment layer 223 formed on an upper surface of the second film 221.

The upper plate 210 and the lower plate 220 are bonded through a laminating process, and the cured reactive liquid crystal 216 of the upper plate 210 is in direct contact with the lower alignment layer 223 of the lower plate 220.

The polarization switching unit 230 bonded to the lower plate 220 through the adhesive layer 240 may include third and fourth films 231 and 232 and third and fourth films 231 and 232. ) And first and second transparent electrodes 233 and 234 formed on the upper and lower transparent layers 235 and 236 formed on the first and second transparent electrodes 233 and 234, respectively, and the The liquid crystal 237 is disposed between the alignment layers 235 and 236.

The molecular direction of the liquid crystal 237 between the upper and lower alignment layers 235 and 236 is determined by the upper and lower alignment layers 235 and 236 as illustrated in FIG. 6. As the electric field is applied between the first and second transparent electrodes 233 and 234, the molecular direction of the liquid crystal 237 is changed as illustrated in FIG. 6, and as a result, passes through the polarization switching unit 230. The polarization direction of one light is changed.

However, the 2D / 3D switching lens as described above has a disadvantage in that when the display is enlarged, the thickness of the lens is increased so that the amount of the liquid crystal is increased and the alignment of the liquid crystal is difficult to provide a high quality autostereoscopic image.

The present invention is characterized by employing a Fresnel lens element in a 2D / 3D switching lens to solve the above problems.

Since the phase of light changes periodically every 2π, the same convex lens functions even if the convex lens is formed by cutting out the point where the phase delay of the lens changes by 2π and attaching it to the plane. Such a lens is called a Fresnel lens, and FIGS. 11A and 11B illustrate the concept of such a Fresnel lens. Fresnel lens has the advantage of being able to manufacture the thick thickness of the conventional convex lens in a thin form. For the design of this Fresnel lens, the height of the Fresnel lens according to the distance in the structure shown in FIG. 6 (b) is defined as follows:

Equation 1

In the above formula, m means the number of Fresnel zone, f is the focal length of the Fresnel lens. If a liquid crystal lens is implemented in the form of a Fresnel lens rather than a general GRIN lens type, since a short focus can be implemented using a thin liquid crystal layer, it has advantages such as low driving voltage, fast response speed, and low chromatic aberration.

7 to 8 are perspective views showing an example of the 2D / 3D switching lens of the present invention.

As illustrated in FIG. 7, the 2D / 3D switching lens of the present invention may be bonded to the display panel 300 by the adhesive layer 400.

The 2D / 3D switching lens 200 includes an upper plate 210 and a lower plate 220 that are bonded to each other.

The upper plate 210 may include a first film 211, a first transparent electrode 212 formed on a bottom surface of the first film 211, a resin layer 213 formed on a bottom surface of the first transparent electrode 212, An upper alignment layer 214 formed on the bottom surface of the resin layer, and a liquid crystal 215 in contact with the upper alignment layer 214.

The resin layer 213 has a plurality of Fresnel lens patterns. The lower plate 220 includes a second film 221, a second transparent electrode 222 formed on an upper surface of the second film 221, and a lower alignment layer 223 formed on an upper surface of the second transparent electrode 222. It includes.

The upper plate 210 and the lower plate 220 are bonded to each other through a laminating process such that the liquid crystal 215 of the upper plate 210 and the lower alignment layer 223 of the lower plate 220 are in direct contact with each other. The initial molecular direction of the liquid crystal 215 between the upper and lower alignment layers 214 and 223 is determined by the alignment layers 214 and 223 as illustrated in FIG. 5. As the electric field is applied between the first and second transparent electrodes 212 and 222, as illustrated in FIG. 6, the molecular direction of the liquid crystal 215 is changed, and as a result, the refractive index of the liquid crystal 215 is changed. Will also change. For example, mode switching to 3D may be performed by applying an electric field between the first and second transparent electrodes 212 and 222. The switching lens 200 of the present invention passes the incident light without changing the path in the 2D mode, but functions as a lens for changing the path of the incident light to provide different two-dimensional images in the left eye and the right eye in the 3D mode. .

As shown in FIG. 8, the 2D / 3D switching lens of the present invention includes an upper plate 210, a lower plate 220 bonded to the upper plate 210, a polarization switching unit 230, and the lower plate 220. The adhesive layer 240 between the polarization switching unit 230 is included.

The upper plate 210 may include a first film 211, a resin layer 213 formed on the bottom surface of the first film 211, an upper alignment layer 214 formed on the bottom surface of the resin layer, and the upper alignment layer 214. And cured reactive mesogen 216 in contact with it. The resin layer 213 has a plurality of Fresnel lens patterns.

The lower plate 220 includes a second film 221 and a lower alignment layer 223 formed on an upper surface of the second film 221.

The upper plate 210 and the lower plate 220 are bonded through a laminating process, and the cured reactive liquid crystal 216 of the upper plate 210 is in direct contact with the lower alignment layer 223 of the lower plate 220.

The polarization switching unit 230 bonded to the lower plate 220 through the adhesive layer 240 may include third and fourth films 231 and 232 and third and fourth films 231 and 232. ) And first and second transparent electrodes 233 and 234 formed on the upper and lower transparent layers 235 and 236 formed on the first and second transparent electrodes 233 and 234, respectively, and the The liquid crystal 237 is disposed between the alignment layers 235 and 236.

The molecular direction of the liquid crystal 237 between the upper and lower alignment layers 235 and 236 is determined by the alignment layers 235 and 236, as illustrated in FIG. 6. As the electric field is applied between the first and second transparent electrodes 233 and 234, the molecular direction of the liquid crystal 237 is changed as illustrated in FIG. 6, and as a result, passes through the polarization switching unit 230. The polarization direction of one light is changed.

That is, the polarization direction of the light passing through the polarization switching unit 230 and the first and second transparent electrodes 233 and 234 without an electric field applied between the first and second transparent electrodes 233 and 234. The polarization direction of the light passing through the polarization switching unit 230 in a state in which an electric field is applied is different, and the cured reactive liquid crystal 216 has different refractive indices with respect to incident light having different polarization directions. .

As a result, the switching lens 200 according to the second embodiment of the present invention also passes the incident light as it is without changing the path in the 2D mode, but in the 3D mode, the path of the incident light is provided to provide different two-dimensional images to the left and right eyes. It functions as a lens for changing.

For example, mode switching to 3D may be performed by applying an electric field between the first and second transparent electrodes 233 and 234.

In the 2D / 3D switching lens of the present invention, as shown in FIG. 7, the Fresnel lens may be formed by the planel lens pattern of the resin layer 213 formed on the bottom surface of the first film 211. have. In addition, as illustrated in FIGS. 9 and 10, a black matrix 250 may be formed below the tip of the Fresnel lens pattern.

In addition, as shown in FIG. 8, the Fresnel lens is formed by the planel lens pattern of the resin layer 213 formed on the bottom surface of the first transparent electrode 212, and the tip portion of the Fresnel lens pattern is formed. The black matrix 250 may be formed below.

The black matrix 250 is formed to prevent crosstalk due to diffraction of light.

As illustrated in FIG. 9, the black matrix may be formed on the lower alignment layer, or as illustrated in FIG. 10, on the bottom surface of the lower substrate.

When the black matrix 250 is formed on the lower alignment layer, the tip portion of the Fresnel lens pattern may be bonded to the black matrix 250 by adhesion. In this case, the effect of preventing the lifting of the Fresnel lens pattern by heat or mechanical force can be obtained.

The bond may be formed by including an adhesive component in the black matrix 250, applying an adhesive to the upper end of the black matrix 250, or applying an adhesive to the tip of the Fresnel lens pattern.

The tip of the Fresnel lens pattern refers to a sharp portion formed toward the lower alignment layer 223 as a planel lens pattern formed on the resin layer 213.

In the present invention, the display panel 300 may provide a 2D image in 2D mode and a 3D image (left eye image and right eye image) in 3D mode, and may be a PDP panel, an LCD panel, or an OLED panel.

As an adhesive for forming the pressure-sensitive adhesive layer 400 for bonding the switching lens 200 and the display panel 300, for example, a transparent pressure-sensitive adhesive may be preferably used.

Fresnel lens in the present invention is not particularly limited, as long as it is known in the art.

In the present invention, the upper alignment layer formed on the inner surface of each Fresnel lens included in the resin layer 213 is not essential. This is because the alignment of the liquid crystal may be possible only by rubbing the inner curved surface.

Since the 2D / 3D switching lens of the above-described form has a small thickness of the liquid crystal layer, the amount of liquid crystal used is small, thereby providing an effect of cost reduction and liquid crystal alignment.

In the present invention, materials such as the first film, the second film, the third film, the fourth film, the upper and lower alignment layers, the first transparent electrode, the second transparent electrode, the liquid crystal, and the like and a method of constructing the 2D / 3D switching lens using the same Is not particularly limited, and techniques known in the art may be applied.

Since the above has just been described with respect to some of the preferred embodiments that can be implemented by the present invention, the scope of the present invention, as is well known, should not be construed as limited to the above embodiments, the present invention described above Technical idea and the technical idea together with the basic will all be included in the scope of the present invention.

[Description of Drawing Reference]

110: upper plate 111: upper substrate

112: upper transparent electrode 113: lenticular lens

114: upper alignment layer 120: lower plate

121: lower substrate 122: lower transparent electrode

123: lower alignment layer 130: display device

140: liquid crystal layer 150: black matrix

200: switching lens 210: top plate

211: first film 212: first transparent electrode

213: resin layer (fresnel lens portion) 214, 235: upper alignment film

215, 216, 237: liquid crystal 220: lower plate

221: second film 222: second transparent electrode

223 and 236: lower alignment layer 230: polarization switching unit

231: third film 232: fourth film

233: first transparent electrode 234: second transparent electrode

240 and 400: adhesive layer 300: display panel

Claims (17)

An upper plate including an upper substrate, an upper transparent electrode formed on a lower surface of the upper substrate, and a lenticular lens portion in which a plurality of lenticular lenses formed on a lower surface of the upper transparent electrode are disposed in parallel in a lateral direction; A lower plate including a lower substrate, a lower transparent electrode formed on an upper surface of the lower substrate, and a lower alignment layer formed on an upper surface of the lower transparent electrode; And A liquid crystal layer included between the upper plate and the lower plate and driven by an electric field applied by the upper transparent electrode and the lower transparent electrode; 2D / 3D switching lens, characterized in that a black matrix is formed under the connection portion of each of the lenticular lens and the lenticular lens. The method according to claim 1, The black matrix is a 2D / 3D switching lens, characterized in that formed on the lower alignment layer. The method according to claim 1, The black matrix is a 2D / 3D switching lens, characterized in that formed on the lower surface of the lower substrate. The method according to claim 1, The black matrix is a 2D / 3D switching lens, characterized in that coupled by the adhesive portion and the tip of the connecting portion of the lenticular lens and the lenticular lens. The method according to claim 4, The black matrix is a 2D / 3D switching lens, characterized in that it comprises an adhesive component. The method according to claim 1, 2D / 3D switching lens, characterized in that the alignment film is formed on the inner curved surface of each lenticular lens included in the lenticular lens unit. An upper plate including a Fresnel lens portion on a first film and a lower surface of the first film, the plurality of Fresnel lenses arranged in parallel in a lateral direction; A lower plate including a second film and a lower alignment layer formed on an upper surface of the second film; And 2D / 3D switching lens comprising a liquid crystal layer between the upper plate and the lower plate. The method according to claim 7, 2D / 3D switching lens, characterized in that the alignment film is formed on the lower curved surface of the Fresnel lens. The method according to claim 7, A first transparent electrode is further provided between the bottom surface of the first film and the top surface of the Fresnel lens unit; 2D / 3D switching lens, characterized in that the second transparent electrode is further provided between the second film upper surface and the lower alignment layer. The method according to claim 7, 2D / 3D switching lens, characterized in that the liquid crystal contained in the liquid crystal layer is a cured reactive liquid crystal. The method according to claim 7, The lower plate is coupled to the polarization switching unit, the polarization switching unit A top plate including a third film, a first electrode formed on the bottom surface of the third film, and an upper alignment layer formed on the bottom surface of the first electrode; A lower plate including a fourth film, a second electrode formed on the top surface of the fourth film, and a lower alignment layer formed on the top surface of the second electrode; And 2D / 3D switching lens comprising a liquid crystal layer between the upper plate and the lower plate. The method according to claim 7, The Fresnel lens is formed by a planar lens pattern of the resin layer formed on the bottom surface of the first film, the 2D / 3D switching lens, characterized in that the black matrix is formed under the tip of the Fresnel lens pattern. The method according to claim 9, The Fresnel lens is formed by a planar lens pattern of the resin layer formed on the bottom surface of the first transparent electrode, the 2D / 3D switching lens, characterized in that the black matrix is formed under the tip of the Fresnel lens pattern. The method according to claim 12 or 13, The black matrix is a 2D / 3D switching lens, characterized in that formed on the lower alignment layer. The method according to claim 12 or 13, The black matrix is a 2D / 3D switching lens, characterized in that formed on the lower surface of the lower substrate. The method according to claim 12, The black matrix is a 2D / 3D switching lens, characterized in that coupled by adhesion with the tip of the Fresnel lens pattern. The method according to claim 16, The black matrix is a 2D / 3D switching lens, characterized in that it comprises an adhesive component.

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