KR20160050423A - Film for autostereoscopic display - Google Patents

Abstract

The present invention relates to a film for an autostereoscopic three-dimensional display apparatus. The film for the autostereoscopic three-dimensional display apparatus comprises: (1) a first transparent substrate; (2) a lenticular lens layer which is disposed on one surface of the first transparent substrate; (3) a second transparent substrate which is disposed in parallel to the first transparent substrate on the lenticular lens layer, wherein the second transparent substrate comes into contact with an upper portion of the lenticular lens layer; and (4) a liquid crystal layer which includes a liquid crystal in a space formed between the lenticular lens layer and the second transparent substrate. According to the present invention, since an amount of liquid crystals is included in the film for the autostereoscopic three-dimensional display apparatus, a small amount of liquid crystals is used in manufacturing the film, and shape restoration performance, such as durability against warpage, is improved.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a film for a three-

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film for a spectacle-free stereoscopic image display device, and more particularly to a film for a spectacle-free stereoscopic image display device capable of 2D / 3D conversion.

The non-eyeglass stereoscopic image display device is constituted by combining a view forming device for separating and displaying images by direction in a flat panel display device such as an LCD, a PDP, and an OLED. According to a view forming device for separating images for each direction, A parallax barrier method of expressing left and right images in the vertical direction and separating both images by setting a large number of barriers so that the left and right channels can not be seen according to the line of sight and the left and right images are refracted through a screen in which the lenticular lenses are arranged vertically A lenticular system for viewing each image with both eyes, and an integrator for realizing a 3D image by arranging a micro-lens corresponding to each pixel in the form of a fly-eye lens, A hologram system that implements a three-dimensional shape by projecting a wave reflected from a three-dimensional object onto the air It can be split.

Among them, the parallax barrier method facilitates screen switching between 2D and 3D, and it is also possible to adjust the viewing distance. However, since the light emitted from the display element is blocked by the barrier, the luminance of the display is lowered and the implementation of multi- In addition, since the integrated method and the hologram method have a disadvantage in that the throughput of the data is too large to be practically realized, the lenticular method is recently attracting attention as a point-of-view stereoscopic image method. In the lenticular method, for example, when each lenticular lens is arranged corresponding to two columns of pixels, the pixels in two rows provide respective vertical sub-images (left / right image images), and the lenticular sheet provides these two vertical sub- The subpixel image corresponding to the display pixel columns associated with the lenticular lenses is projected on the left and right eyes of the viewer viewing from the front of the lenticular sheet so that the viewer views a single stereoscopic image.

Since the resolution of the lenticular lens is inevitably degraded in accordance with the principle of operation of the lenticular system as described above, recently, as the high resolution becomes the main point of the display, the lenticular lens is improved and the lenticular lens using the liquid crystal capable of 2D / The technology for the cylindrical lens system has been actively developed.

A stereoscopic display device capable of 2D / 3D conversion using a lenticular lens using a liquid crystal has a function of displaying a 2D plane image without resolution degradation, It is possible to project an image. As described above, the lenticular lens system using liquid crystal has a good luminance and can realize a 2D image which does not involve resolution degradation depending on whether a voltage is applied or a non-eyeglass stereoscopic image display.

However, in the case of a stereoscopic display device using a general lenticular lens using a liquid crystal, the lens height must be at least several tens of micrometers in order to exhibit a sufficient lens effect at an appropriate focal length. Therefore, In addition, when the flexible plastic film is used for producing a film for a spectaclesless stereoscopic image display device, the area where the upper / lower substrate films can be fixed by cohesion has only a narrow bony area between the lens and the lens. Therefore, And the like.

Accordingly, it is possible to reduce the amount of liquid crystal consumed when manufacturing a film for a spectacle-free stereoscopic image display device using a lenticular lens using liquid crystals, and to improve adhesion of the upper and lower substrates included in the film for a spectacle- Development of a film for a spectacle-free stereoscopic image display device having high shape retention such as durability is required.

WO 2013-104518 A1

Accordingly, an object of the present invention is to provide a film for a spectacle-free stereoscopic image display device using a lenticular lens using liquid crystal, which film has a small amount of liquid crystal and has high shape retention such as durability against bending .

In order to achieve the above object,

(1) a first transparent substrate;

(2) a lenticular lens layer located on one surface of the first transparent substrate;

(3) a second transparent substrate positioned on the lenticular lens layer in parallel with the first transparent substrate, the second transparent substrate being in contact with an upper end of the lenticular lens layer; And

(4) A liquid crystal display device comprising a liquid crystal layer including a liquid crystal in a space portion formed between the lenticular lens layer and the second transparent substrate

And a film for a spectacle-free three-dimensional image display device.

The film for a spectaclesless stereoscopic image display according to the present invention has a small amount of liquid crystals because it contains a small amount of liquid crystals and thus has a small amount of liquid crystals during production and high shape retention such as durability against warpage, It can represent an image or represent a 3D stereoscopic image.

1 is a diagram schematically showing a state in which a film for a spectacles-free stereoscopic image display apparatus according to an embodiment of the present invention operates in a 3D mode.
2 is a diagram schematically showing a state in which a film for a spectacles stereoscopic image display apparatus according to an embodiment of the invention operates in a 2D mode.

Hereinafter, the present invention will be described in more detail.

The non-eyeglass stereoscopic image display film of the present invention comprises (1) a first transparent substrate; (2) a lenticular lens layer located on one surface of the first transparent substrate; (3) a second transparent substrate positioned on the lenticular lens layer in parallel with the first transparent substrate, the second transparent substrate being in contact with an upper end of the lenticular lens layer; And (4) a liquid crystal layer including a liquid crystal in a space portion formed between the lenticular lens layer and the second transparent substrate, (5) an adhesive layer positioned on the other surface of the first transparent substrate, and (6) anti-reflection (AR), anti-glare (AG), high clear (HC) layer, functional layer) located on the other surface of the second transparent substrate in contact with the upper end of the lenticular layer As shown in FIG.

(1) First transparent substrate

The first transparent substrate may be made of a transparent plastic or a glass substrate, preferably a transparent plastic.

A transparent electrode may be deposited on the first transparent substrate to apply a voltage. Examples of the transparent electrode include indium tin oxide (ITO), carbon nano tube (CNT), metal mesh metal mesh, and Ag nanowire.

It is preferable that the first transparent substrate should have good adhesion to the binder resin, transmittance of light incident from the rear surface is 90% or more, and smoothness of the surface is uniform so that the brightness does not vary.

The thickness of the first transparent substrate may be 50 to 500 mu m, preferably 50 to 200 mu m, more preferably 80 to 125 mu m.

Specific examples of the material suitable for the first transparent substrate include polyether sulfone (PES), polyacrylate (PAR), polyetherimide (PEI), polyethylene naphthalate (PEN) (PET), polyphenylene sulfide (PPS), polyallylate, polyimide, polycarbonate (PC), cellulose triacetate (TAC), cellulose acetate propionate Cellulose acetate propionate (CAP) and mixtures thereof. Preferably, polyethylene terephthalate, polycarbonate, cellulose triacetate or polyacrylate having optically isotropic properties can be used.

(2) Lenticular lens layer

The lenticular lens layer is disposed on one surface of the first transparent substrate, and the lenticular lens layer is composed of a plurality of lenticular lenses. The shape of the upper end of the lenticular lens may be a flat surface. That is, each lenticular lens may have a shape in which the lower end portion and the upper end portion are formed as flat surfaces, and the area of the flat surface of the upper end portion with respect to the area of the lower end portion of the lenticular lens is 3 to 50%, preferably 6 to 33% And more preferably 11 to 33%.

The height of the lenticular lens may be 2 to 300 탆, preferably 5 to 120 탆, more preferably 20 to 80 탆, so that the height of the lenticular lens layer is 2 to 300 탆, preferably 5 to 120 탆 , And more preferably 20 to 80 탆.

The size of the lenticular lens may be a size typically used depending on the resolution and the pixel size of the display device or the viewing distance, and may have a radius of, for example, about 0.01 to 10 mm, 0.05 to 8 mm, and 0.1 to 5 mm . The lenticular lens may be aspherical.

The lenticular lens layer may be manufactured by applying a lenticular lens shape to one surface of the first transparent substrate. For example, a binder resin is applied to one surface of a transparent plastic constituting the first transparent substrate, and then roll molding is performed using a roll having a predetermined pattern, followed by curing to form a convex lenticular lens have.

The binder resin may be a commonly used thermosetting resin and a UV curing resin. For example, an acrylic resin, a urethane resin, an epoxy resin, a vinyl resin, a polyester resin, a polyamide resin or a mixture thereof may be used. Specific examples thereof include (meth) acrylate resin, unsaturated polyester resin, polyester (meth) acrylate resin, silicone urethane (meth) acrylate resin, silicone polyester (meth) acrylate resin, fluorourethane Acrylate resins and mixtures thereof. Preferably, acrylic resins capable of realizing excellent coating properties, mechanical properties, adhesive strength, durability and the like can be used. Specific examples thereof include methyl methacrylate, methacryl, ethyl acrylate, butyl acrylate, aryl acrylate, hexyl acrylate, isopropyl A homopolymer having repeating units of methacryl, benzyl acryl, vinyl acryl, 2-methoxyethyl acryl or styrene, or a copolymer obtained by copolymerizing the above two or more components may be used.

The binder resin may have a refractive index after curing of 1.4 to 1.8, preferably 1.45 to 1.7, more preferably 1.5 to 1.65.

(3) The second transparent substrate

The second transparent substrate is disposed on the lenticular lens layer in parallel with the first transparent substrate, and contacts the upper end of the lenticular lens layer.

Each of the lenticular lenses constituting the lenticular lens layer has a narrower area at the upper end than at the lower end, so that a space is formed between the lenticular lens layer and the second transparent substrate.

The second transparent substrate may be made of a transparent plastic or a glass substrate, and preferably a transparent plastic.

A transparent electrode may be deposited on the second transparent substrate to apply a voltage in the same manner as the first transparent substrate. Examples of the transparent electrode include indium tin oxide (ITO), carbon nano tube, CNTs, metal meshes, Ag nanowires, and the like. As a result, the first transparent substrate and the second transparent substrate are electrically connected, and the orientation of the liquid crystal can be changed as the voltage is applied.

A specific example of the material suitable for the second transparent substrate is the material described above as a material suitable for the first transparent substrate.

The second transparent substrate may be attached to the upper end of the lenticular lens layer through a bonding agent. Since the upper end portion of the lenticular lens is formed as a flat surface, the area of the upper end portion is larger than that of a typical lenticular lens, so that the attachment area is large. Therefore, even when the film for a spectacle- The second transparent substrate can be prevented from being peeled off from the second transparent substrate, and the shape-retaining force such as durability against warping is high.

Examples of the adhesive agent include acrylic adhesives, urethane adhesives, epoxy adhesives and silicone adhesives.

(4) liquid crystal layer

The space portion formed between the lenticular lens layer and the second transparent substrate includes a liquid crystal to form a liquid crystal layer. At this time, the liquid crystal alignment layer may be positioned on the lenticular lens layer and the second transparent substrate, and the space portion may be surrounded by the liquid crystal alignment layer. The liquid crystal alignment layer may have a groove in a predetermined direction so that the liquid crystal contained in the liquid crystal layer can be oriented in a predetermined direction depending on whether a voltage is applied or not. Accordingly, the liquid crystal contained in the liquid crystal layer is oriented in a certain direction according to the application of a voltage and the refractive index of the liquid crystal layer changes, so that the film for a spectacles stereoscopic image display of the present invention can be converted into a 2D mode and a 3D mode do. That is, the refractive index of the liquid crystal layer may vary depending on the alignment state of the liquid crystal contained in the liquid crystal layer.

For example, when the film for an eyeglass stereoscopic image display apparatus of the present invention operates in a 2D mode, the extraordinary ray refraction index (n _e ) or normal ray refraction index (n ₀ ) of the liquid crystal layer coincides with the refractive index of the lenticular lens layer , Allowing the light incident from the display panel to pass through without being refracted. Meanwhile, when the film for the spectacles spectacles stereoscopic image display apparatus of the present invention is operated in the 3D mode, the refractive index of the liquid crystal layer is changed by changing the orientation state of the liquid crystal so that light incident from the display panel passes through the lenticular lens layer The liquid crystal layer is refracted to realize a stereoscopic image.

When a voltage is applied to the liquid crystal layer to change the refractive index to operate in the 3D mode, the liquid crystal layer may have a lower refractive index than the lenticular lens layer.

(2) the refractive index of the lenticular lens layer is n1, (4) the extraordinary ray refraction index (n _e ) of the liquid crystal layer or the ordinary ray refraction index (n _o ) is n 2, then 0.05 ≤ | n 1 - n 2 | ≪ 0.26, preferably 0.06? | N1 - n2 | ≪ 0.20, and more preferably 0.08? | N1 - n2 | ≪ 0.15 can be satisfied.

(5) Adhesive layer

The film for a spectacles-free stereoscopic image display apparatus of the present invention may further include an adhesive layer positioned on the first transparent substrate.

The adhesive layer is for attaching a spectacle-free stereoscopic image display film to a display panel, and can be formed by applying a pressure-sensitive adhesive composition containing a pressure-sensitive adhesive on the other surface of the first transparent substrate.

The application of the pressure-sensitive adhesive composition may be performed by a method such as gravure roll coating, die coating, comma coating or gap coating.

Examples of the pressure-sensitive adhesive include acrylic, urethane, epoxy, and silicone adhesives, and preferably acrylic pressure-sensitive adhesives.

The thickness of the pressure-sensitive adhesive layer may be 1 to 100 占 퐉, preferably 2 to 20 占 퐉.

(6) Antireflection (functional, AR, AG, HC function) layer

The film for a spectaclesless stereoscopic image display apparatus of the present invention may further include an antireflection (functional) layer positioned on the other side of a surface of the second transparent substrate which is in contact with the upper end of the lenticular layer.

The antireflection layer may be formed on the other surface of the second transparent substrate, which is in contact with the upper end of the lenticular layer, through a coating, or an antireflection layer may be formed on a separate support, Or by attaching them using a chemical agent.

The anti-reflection layer reduces irregular reflection of reflected light due to external light incident on the spectacle-free three-dimensional image display film of the present invention, thereby reducing haze and minimizing the influence of reflection of external light, So that the film exhibits high light transmittance.

In addition, the surface hardness of the transparent support film can be increased to prevent the occurrence of scratches on the surface.

The antireflection layer may be formed of a resin composition including a resin such as a thermoplastic resin, a thermosetting resin, and an ionizing radiation curable resin. The antireflection layer preferably includes ionizing radiation (ultraviolet ray or electron beam) curable resin so as to have a particularly high surface hardness Based resin composition.

Specific examples of the thermoplastic resin and the thermosetting resin include a polyester resin, an acrylic resin, an acrylic urethane resin, a polyester acrylate resin, a polyurethane acrylate resin, an epoxy acrylate resin, a urethane resin, an epoxy resin, a poly Based resin, a melamine-based resin, a phenol-based resin, a silicone-based resin, and a mixture thereof, and the like can be given.

As the ionizing radiation curable resin, a photopolymerizable prepolymer which is crosslinked and cured by irradiation with ionizing radiation can be used. Examples of the photopolymerizable prepolymer include a cationic polymerization prepolymer and a radical polymerization prepolymer.

Examples of the cationic polymerization type photopolymerizable prepolymer include epoxy resins and vinyl ether resins. Examples of the epoxy resins include bisphenol-based epoxy resins, novolak-type epoxy resins, alicyclic epoxy resins, aliphatic epoxy resins, And the like.

As the radically polymerizable photopolymerizable prepolymer, an acrylic prepolymer (hard prepolymer) having two or more acryloyl groups in one molecule and having a three-dimensional network structure through crosslinking curing can be used particularly preferably from the viewpoint of hard coatability .

Examples of the acrylic type prepolymer include urethane acrylate, polyester acrylate, epoxy acrylate, melamine acrylate, polyfluoroalkyl acrylate, silicone acrylate, and mixtures thereof.

The urethane acrylate-based prepolymer can be obtained, for example, by esterifying a polyurethane oligomer obtained by a reaction of a polyether polyol or a polyester polyol with a polyisocyanate through a reaction with (meth) acrylic acid.

The polyester acrylate-based prepolymer may be obtained by, for example, esterifying a hydroxyl group of a polyester oligomer having hydroxyl groups at both terminals obtained by condensation of a polyvalent carboxylic acid and a polyhydric alcohol with (meth) acrylic acid, (Meth) acrylic acid at the terminal hydroxyl group of an oligomer obtained by adding a seed.

The epoxy acrylate-based prepolymer can be obtained by, for example, esterifying a bisphenol-type epoxy resin having a relatively low molecular weight or an oxirane ring of a novolac epoxy resin with a (meth) acrylic acid.

The antireflection layer may further comprise a photopolymerizable monomer for imparting various performances such as improvement of crosslinking curability or adjustment of curing shrinkage.

Examples of the photopolymerizable monomer include monofunctional acrylic monomers (e.g., 2-ethylhexyl acrylate, 2-hydroxyethyl acrylate, 2-hydroxypropyl acrylate, butoxyethyl acrylate, etc.), bifunctional acrylic monomers For example, 1,6-hexanediol diacrylate, neopentyl glycol acrylate, diethylene glycol diacrylate, polyethylene glycol diacrylate, hydroxypivalic acid ester neopentyl glycol diacrylate, etc.), trifunctional or higher acryl And monomers (e.g., dipentaerythritol hexaacrylate, trimethyl propane triacrylate, pentaerythritol triacrylate, etc.).

When the antireflection layer is formed by curing the resin composition by ultraviolet irradiation, a photopolymerization initiator may be further included in addition to the photopolymerizable prepolymer and the photopolymerizable monomer.

As the photopolymerization initiator, any of ordinary initiator surfaces commonly used for curing the ultraviolet ray hardening resin can be used. Examples of the photopolymerization initiator include oxime ester, acetophenone, benzophenone, benzoin and benzoyl, xanthone, triazine, halomethyl A photoinitiator such as an oxadiazole series or a ropin dime group can be used. These may be used alone or in combination of two or more.

The photopolymerization initiator may be used in an amount of usually 0.2 to 10 parts by weight based on 100 parts by weight of the total of the photopolymerizable prepolymer and the photopolymerizable monomer.

The antireflection layer may contain further additives as needed insofar as the effect of the present invention is not impaired.

The additive may be at least one selected from the group consisting of a surface control agent, a lubricant, a coloring agent, a pigment, a dye, a fluorescent whitening agent, a flame retardant, an antibacterial agent, a fungicide, an ultraviolet absorber, a light stabilizer, a heat stabilizer, an antioxidant, Antifoaming agents, dispersants, storage stabilizers, crosslinking agents or silane coupling agents.

The antireflection layer can be formed by applying a resin composition containing the resin and, if necessary, a further additive on the transparent substrate (4), and curing the resin composition.

The application of the resin composition may be performed by a method such as gravure roll coating, die coating, comma coating or gap coating.

The antireflection layer may have a surface hardness of H or more, preferably 2H or more, more preferably 3H or more. The value of the surface hardness is a value represented by pencil hardness measured by a method in accordance with JIS-K5400 (1990).

The film for a spectacle-free three-dimensional image display device of the present invention

(1) A glass substrate on which a transparent electrode such as ITO or the like is coated or a binder resin is coated on one side of a transparent substrate (first transparent substrate), roll molding is performed using a roll having a predetermined pattern, Forming a lenticular lens layer having a convex shape to manufacture a lenticular lens film;

(2) A liquid crystal alignment film such as polyimide (PI) is formed on the transparent electrode of the glass substrate or the transparent substrate (second transparent substrate) on which transparent electrodes such as ITO are deposited as described above, Rubbing the liquid crystal molecules to align the liquid crystal molecules in one direction by forming a fine scratch using a rubbing cloth made of a material;

(3) After the lenticular lens layer is brought into contact with the liquid crystal alignment layer, the liquid crystal alignment layer is adhered using an adhesive, and the liquid crystal is injected into the space between the lenticular lens layer and the liquid crystal alignment layer.

At this time, if necessary, the anti-reflection layer may be formed on one side of the second transparent substrate in the step (2), and a liquid crystal alignment layer may be formed on the lenticular lens.

A wire for voltage application is connected to the transparent electrode of the film for a spectacles stereoscopic image display of the present invention manufactured as described above and attached to a display panel including a plurality of stereoscopic views, A stereoscopic image display device can be manufactured.

Accordingly, the present invention provides a non-eyeglass stereoscopic image display device including the film for the non-eyeglass stereoscopic image display device and the display panel including a plurality of stereoscopic view images. The diameter of the upper end of the lenticular lens included in the non-eyeglass stereoscopic image display device may coincide with one pixel width of the stereoscopic view.

In the 3D mode of a stereoscopic display device capable of 2D / 3D conversion using a lenticular lens using a liquid crystal in the past, light emitted from a display pixel of a display passes through a liquid crystal in a lenticular lens through a lower substrate, Is refracted at the interface with the ground layer, passes through the transparent electrode and the upper substrate, and exits to the viewing space to reach the viewer's eyes. A liquid crystal alignment layer is disposed on the inner surface of the lenticular lens and the upper portion of the lower substrate, and the liquid crystal can be aligned in a predetermined direction when a voltage is applied.

In a 2D mode of a stereoscopic display device capable of 2D / 3D conversion using a conventional lenticular lens using liquid crystal, when a voltage is applied, the liquid crystal is oriented in a certain direction, so that the refractive indices of the liquid crystal and the resin layer become equal So that light refraction does not occur at the interface between the resin layer and the lenticular lens.

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

FIGS. 1 and 2 schematically show states of a non-eyeglass stereoscopic image display device according to an exemplary embodiment of the present invention in a 3D mode and a 2D mode, respectively.

1, a film for a spectaclesless stereoscopic image display device according to an exemplary embodiment of the present invention includes a first transparent substrate 110, a lenticular lens layer 120 located on one surface of the first transparent substrate 110, A second transparent substrate 130 disposed on the layer 120 in parallel with the first transparent substrate 110 and contacting the upper end 121 of the lenticular lens layer 120; And a liquid crystal layer 140 having a space portion between the lenticular lens layer 120 and the second transparent substrate 130 and including a liquid crystal 150 in the space portion. At this time, the shape of the upper end 121 of the lenticular lens layer 120 may be a flat surface.

The liquid crystal 150 may be irregularly positioned in the 3D mode. However, when a voltage is applied for the 2D mode, the liquid crystal 150 may be moved in the 3D mode, And is oriented in one direction.

An adhesive layer (not shown) may be disposed on the other surface of the first transparent substrate 110, and a plurality of (three in FIG. 1) three-dimensional viewing views, The stereoscopic image display device can be attached to the stereoscopic image display device 200, thereby making it possible to construct a spectacle-free stereoscopic image display device.

In the non-eyeglass stereoscopic image display apparatus according to the present invention, the diameter of the upper end 121 of the lenticular lens 12 included in the spectacle-free stereoscopic image display device may coincide with the width of one pixel 210 of the stereoscopic view .

Hereinafter, the present invention will be described in more detail with reference to the following examples. However, the following examples are for illustrative purposes only and are not intended to limit the scope of the present invention.

Example  One

A resin (UV curable acrylic resin) having a refractive index of 1.61 was coated on one side of a first transparent substrate made of PET having a thickness of 188 탆 on which a transparent electrode made of ITO was deposited and then a mold was used to measure a radius of 0.305 mm and a height of 72.2 탆 A lenticular lens layer (convex shape) having a pitch of 411.75 占 퐉 (having a height up to the flat surface; 80 占 퐉 in the case of a circular lens having no flat surface) and a pitch of 411.75 占 퐉 was formed to produce a lenticular lens film. At this time, the upper end of the lenticular lens was a flat surface, and the diameter of the flat surface was 137.25 탆 in diameter so as to coincide with one pixel width of the stereoscopic view of the display panel including three stereoscopic views.

Next, a liquid crystal alignment layer made of a polyimide film having a thickness of 100 nm was formed on one surface of a second transparent substrate made of PET having a thickness of 188 탆 on which a transparent electrode made of ITO was deposited by an ink-jet coating method.

(Or a thermoplastic resin such as EVA) adhesive so that the upper surface of the lenticular lens layer of the lenticular lens film and the liquid crystal alignment layer of the second transparent substrate on which the liquid crystal alignment film is formed are in contact with each other, And n _o = 1.51 and n _e = 1.61 were injected into the space between the first transparent substrate film and the second transparent substrate film to prepare a film for a spectacle-free stereoscopic image display device.

Further, a pressure-sensitive adhesive (X-313, Saidensa) made of acrylic resin was coated on the other surface of the first transparent substrate of the above-prepared film for a non-eyeglass stereoscopic image display device by die coating to form an adhesive layer, Eye stereoscopic image display device was manufactured by attaching a film for a spectacle-free stereoscopic image display device to the display panel including the stereoscopic view through the adhesive layer.

Example  2

In Embodiment 1, when the upper end of the lenticular lens is a flat surface (diameter: 137.25 占 퐉), a lenticular lens layer having a lens pitch of 686.25 占 퐉 is formed so that the display panel includes five stereoscopic views , A film for a spectacle-free stereoscopic image display device was produced in the same manner as in Example 1, and a film for a spectacle-free stereoscopic image display device was formed on the display panel including five stereoscopic views through the above- Thereby manufacturing a spectacle-free three-dimensional image display device.

Comparative Example  One

Except that a lenticular lens layer (concave shape) having a radius of 0.305 mm, a height of 80 占 퐉 and a lens pitch of 411.75 占 퐉 was formed at the time of manufacturing the lenticular lens layer in Example 1 and the upper end of the lens was not formed as a flat surface , And a lenticular lens film was produced in the same manner as in Example 1.

Next, a liquid crystal alignment layer made of a polyimide film having a thickness of 100 nm was formed on one surface of a second transparent substrate made of PET having a thickness of 188 탆 on which a transparent electrode made of ITO was deposited by an ink-jet coating method.

The lenticular lens film and the liquid crystal alignment film of the second transparent substrate on which the liquid crystal alignment film was formed were brought into contact with each other so as to be in contact with each other. Then, the film was sealed with a UV curable sealant (Henkel LP-163) Liquid crystal having n _o = 1.5 and n _e = 1.7 was injected into the lens of the lenticular lens layer to prepare a film for a spectacle-free stereoscopic image display device.

Further, a pressure-sensitive adhesive (X-313, Saidensa) made of acrylic resin was coated on the other surface of the first transparent substrate of the above-prepared film for a non-eyeglass stereoscopic image display device by die coating to form an adhesive layer, Eye stereoscopic image display device was manufactured by attaching a film for a spectacle-free stereoscopic image display device to the display panel including the stereoscopic view through the adhesive layer.

Liquid crystal filling volume
(Comparative Example 1, 100% basis) Adhesive contribution area at the top
(Compared to the lower end of the lens) Example 1 47 1/3 Example 2 48 1/5 Comparative Example 1 100

0

0

As can be seen from the above Table 1, the film for a spectacle-free stereoscopic image display according to Examples 1 and 2 of the present invention has a small liquid crystal filling volume and can reduce the amount of liquid crystal used, and the upper end of the lenticular lens is flat The area of adhesion with the transparent film laminated on the lenticular lens layer is large and a high adhesive force can be exhibited, so that the shape retaining force such as durability against warping is high.

110: first transparent substrate 120: lenticular lens layer
121: upper end part 130: second transparent substrate
140: liquid crystal layer 150: liquid crystal
200: Display panel including stereoscopic view
210: pixel of stereoscopic view

Claims (10)

(1) a first transparent substrate;
(2) a lenticular lens layer located on one surface of the first transparent substrate;
(3) a second transparent substrate positioned on the lenticular lens layer in parallel with the first transparent substrate, the second transparent substrate being in contact with an upper end of the lenticular lens layer; And
(4) A liquid crystal display device comprising a liquid crystal layer including a liquid crystal in a space portion formed between the lenticular lens layer and the second transparent substrate
And a film for a spectacle-free three-dimensional image display device.
The method according to claim 1,
(5) The film for a spectacles-free stereoscopic image display device, further comprising an adhesive layer located on the other surface of the first transparent substrate.
The method according to claim 1,
(6) an antireflection (functional) layer located on the other surface of the second transparent substrate in contact with the upper end of the lenticular lens layer.
The method according to claim 1,
Wherein the lenticular lens layer is composed of a plurality of lenticular lenses and the shape of the upper end of the lenticular lens is a flat surface.
5. The method of claim 4,
Wherein the area of the flat surface of the upper end with respect to the area of the lower end of the lenticular lens is 3 to 50%.
The method according to claim 1,
Wherein the lenticular lens layer has a height of 2 to 300 占 퐉.
The method according to claim 1,
Wherein the refractive index of the liquid crystal layer changes in accordance with an orientation state of the liquid crystal contained in the liquid crystal layer.
The method according to claim 1,
Wherein the extraordinary ray refraction index (n _e ) or normal ray refraction index (n _o ) of the liquid crystal layer coincides with the refractive index of the lenticular lens layer.
9. A non-eyeglass stereoscopic image display device comprising a film for a spectacle-free stereoscopic image display device according to any one of claims 1 to 8, and a display panel including a plurality of stereoscopic views.
10. The method of claim 9,
Wherein the diameter of the upper end of the lenticular lens included in the spectacle-free stereoscopic image display device coincides with one pixel width of the stereoscopic view.

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